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  • 1
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Five human teratoma cell lines have been characterized for the presence of a certain number of marker antigens whose presence or absence has been shown to be characteristic of mouse embryonal carcinoma (EC) cells. Four out of the five lines have been shown to respond to at least some of the criteria associated with murine EC cells even though only limited in vitro differentiation could be demonstrated. The significance of certain unusual marker antigen combinations present on the cell line Tera I and its clones and so far unobserved for the murine model is discussed. The observation in Tera I populations of cells carrying simultaneously both the F9 and β2-microglobulin or HLA antigens, suggest that the human cell lines may represent a novel material for the study of mammalian differentiation.
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  • 2
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 8 (1981), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Principles of Gene Manipulation. Studies in Microbiology
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  • 3
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: A healthy 22-year-old woman was noted to have erythrocytes of the Pk phenotype: a strong Pk antigen, no detectable P antigen and anti-P antibody in her serum. Her erythrocytes contained four to six times as much Pk glycolipid (globotriaosylceramide or CTH) and approximately half as much P glycolipid (globotertraosylceramide or globoside) as normal red cells. The structures of CTH and globoside were characterized by analysis of permethylated sugars and complement fixation in addition to chromaographic mobility and sugar composition. Inasmuch as the erythrocytes of two Pk individuals that were analysed previously (Marcus et al., 1976) contained no detectable globoside, these abnormalities appear o represent a new phenotype in the P blood group system.
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  • 4
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: We studied 201 unrelated French Basque individuals for HLA and Bf polymorphisms. The haplotypes of eighty-seven of them were deduced from family studies. The results show the frequency of the Bf F1 allele (0.1393) which is the highest one currently reported. They confirm the high frequencies of HLA-Aw19.2 and B18 previously reported in that population and show that a whole haplotype with strong linkage disequilibria, namely Aw19.2, Cw5, B18, Bf F1, DRw3 is frequent. On the other hand, the gene frequency of Bf S is decreased (0.5497) as compared with the other European Caucasoïd populations, while a slight increase in the Bf F gene frequency (0.2960) appears. These results point out that it is of importance to consider the genetic background in choosing the population where linkage disequilibria are to be studied.
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  • 5
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The genetic control of hybrid resistance to BALB/c fibrosarcoma Meth-A was investigated. A Meth-A tumour grew slower in (BALB/c X C57BL/6)F1 and reciprocal hybrid mice than in syngeneic BALB/c mice and was also found to grow slower in females than in males. Significant F1 resistance was demonstrated after both subcutaneous and intraperitoneal injection of tumour cells. However, (BALB/c X DBA/2)F1 mice did not show any significant resistance to Meth-A. In H-2 linkage studies of [BALB/c X (BALB/c X C57BL/6)] backcross mice, no statistically significant differences in the resistance of H-2 heterozygotes and homozygotes to Meth-A were observed. These results indicated that F1 hybrid resistance to Meth-A was controlled by non-H-2-linked resistance factor(s). No linkage was observed between resistance to Meth-A and coat colour c- and b-loci.
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  • 6
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: CBA/N mice have an X-linked B cell defect which prevents them from responding to non-mitogenic thymic independent (TI-II) antigens such as dinitrophenylated (DNP-AGG) Ficoll. The F1 male progeny of CBA/N female mice express the same defect. Spleen cell suspensions from such defective mice (CBA/N X C3H/HeN F1 males) could not respond to DNP-AGG-Ficoll following in vitro immunization and subsequent transfer into irradiated, syngeneic, F1 male recipients as expected. In contrast, normal CBA/N X C3H/HeN F1 female spleen cells could respond and effect a ‘rescue'; they mounted strong plaque-foriming cell 7 days after in vitro exposure to DNP-AGG-Ficoll and subsequent transfer into irradiated F1 male recipients. Defective F1 male spleen cells could bind significant quantities of DNP-AGG-Ficoll, however, after, in vitro exposure. Extensive washing of these spleen cells could not reverse this binding. Such DNP-AGG-Ficoll-exposed and washed F1 male spleen cells could, after transfer, aid normal untreated F1 female cells in their rescue function. The defective F1 male spleen cells could convey immunogenic quantities of DNP-AGG-Ficoll to the ‘rescuing’ F1 female cells.Mitomycin treatment of F1 male cells did not interfere with their conveyor function. Goat anti-mouse μ serum impeded the passive antigen conveyor function of defective F1 male cells as did prior exposure to high concentrations of free DNP-AGG hapten. Our data support the view that the B cell defect of CBA/N X C3H/HeN F1 male mice does not relate to antigen binding, but rather to an inability to be effectively triggered by certain cell-bound polymeric antigens.
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  • 7
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
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  • 8
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Results of a population study with all currently available B-cell specific alloantisera indicate that eight antigens controlled by the RhLA-linked DR locus can now be identified. This leaves a gene frequency of about 0.15 for unidentified or ‘blank’ antigens of that locus. Of the nine identifiable la antigens which are not controlled by the DR locus, three or four may form the basis of a second series which is probably also controlled by the RhLA region.
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  • 9
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Induction of tolerance to bovine serum albumin was studied in mice selected for high (H) or low (L) antibody responsiveness and in their F1 hybrids. No high or low zone tolerances were obtained in H mice whereas L mice were susceptible to tolerance induction by the two schedules. H mice were immunized by repeated injections of tolerogenic BSA for low zone tolerance induction but not after the administration of a single high dose of tolerogenic BSA. Resistance to tolerance induction is dominant in F1 hybrids.
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  • 10
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: An attempt is made to account for immunoglobulin chain synthesis in terms of genetic events involving IS or controlling elements analogous to those found in bacteria, maize and drosophila. Transposition of variable and constant genes and normal immunoglobulin chain synthesis as well as qualitative and quantitative abnormalities might be explained by such regulatory elements. Intrachromosomal transpositions over short distances would be expressed as apparent hypermutability or redundancy of the variable DNA segment. The constant gene might comprise four sequences coding for the three homology domains and the hinge, separated by intervening sequences. A strong preference for shortrange transposition on the same chromosome and immobilization of the controlling element in the end might account for allelic exclusion.
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  • 11
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 7 (1980), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Fab2 fragments from antisera raised in rabbits with partially purified cellular and serum HLA antigens were tested for their ability to block the cytolytic activity of operationally specific HLA-A, B alloantisera. One Fab2 fragment preparation blocked the cytolytic activity of all the HLA-A,B alloantisera tested; the remaining nine inhibited the lytic activity of alloantisera to certain HLA-A,B allospecificities, suggesting that these xenoantisera contain antibody to certain HLA-A,B allotype determinants or to closely associated structures. In contrast to previous reports in the literature none of the xenoantisera contained significant amounts of antibodies to human β2-microglobulin.
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  • 12
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: MHC class II molecules and self antigens, such as Mls, influence T-cell selection by clonal deletion of potentially self-reactive T cells. In order to examine the role of various class II molecules in the T-cell receptor-self antigen interaction, class II transgenic and recombinant mice were analysed for TCR expression. Our studies indicate that the Aα and Eα chains can present Mls gene products for the clonal deletion of Vβ6-bearing T cells, and that the Aαq chain is defective in this process. We have also shown that Eα Aβ heterodimer in transgenic and recombinant mice is expressed and functions to delete I-E reactive Vβ11 T cells, demonstrating again the role of the Eα molecule.
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  • 13
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The localization of TNF genes on the short arm of chromosome 6 between HLA B and the complement genes focused attention to that genetic region which harbours many immunologically relevant genes and is also thought to hold susceptibility genes for a variety of autoimmune diseases that are linked to specific alleles of particular loci in the HLA D region. Since the recently established HLA-DR-DQ variation accounts only for part of the genetic susceptibility to insulin-dependent diabetes mellitus (IDDM) we searched for genomic variation of the tumour necrosis factor (TNF) alpha. We have identified a TNF-alpha restriction fragment length polymorphism (RFLP) with N coI and analysed diabetic patients including their families, controls and homozygous typing cell lines (HTC) defined by the 10th International Histocompatibility Workshop. Segregation analysis in families and HTC results show a strong linkage of the TNF-alpha 5.5 kb allele with DR types in particular with AIB8DR3. This tight linkage of TNF-alpha alleles with extended haplotypes and the significant increase of heterozygotes in patients could lead to some explanation of the DR3 association with a variety of autoimmune diseases particularly IDDM.
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  • 14
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    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The role of the MHC class II antigens in the activation of resting human B lymphocytes (B-Go) was examined with respect to both early and late events in the activation process.The (Ca2+)i induced by anti-IgM was enhanced in the presence of, or following pre-incubation with, an anti-MHC class II DR antibody (D1.12). Pre-incubation with a sepharose conjugated antibody (Seph.-D1.12) augmented the proliferation of B-Go in response to a sub-optimal concentration of anti-IgM.The 2D PAGE profile of B-Go differed from that of in vivo activated B lymphocytes. The 2D PAGE profile of B-Go activated by Seph.-D1.12 was not identical to the profile of B-Go activated by either anti-IgM or PMA.These data suggest that the activation of B-Go via the class II antigens shares part of the pathway of anti-IgM induced activation but does not follow an identical pathway.
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  • 15
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: We established the organization of the AKR Qa region and determined the sequence of the 44 and Q5 genes. Restriction mapping and genomic Southern blot analysis revealed that the AKR strain codes for only three H-2K homologous genes in this region. The AKR Q5 gene is not homologous to the Q5 gene of the C57BL strain, but is presumably allelic to the Q5 gene isolated from Balb/c. The organization and structure of the AKR Qa family is virtually identical to the Qa genes of the C3H mouse. The AKR Q5 gene, in contrast to other H-2K homologous Qa region genes, codes for a typical transmembrane region, and upon transfection into BHK cells, a 1.6 kb Q5 transcript is detected.
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  • 16
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The metastatic B16 mouse melanoma shows a low cell surface expression of H-2Kb and H-2Db class I antigens on cells of both the high-metastatic line B16-F10 and the low-metastatic line B16-F1. Similarly, newly generated clones of these lines, having different metastatic properties, all express low levels of major histo-compatibility antigens. One of these clones, the high-metastatic F10.9, was transfected with H-2Kb genes to generate H-2Kb-expressing transfectants. The resulting clones showed reduced tumourigenicity and a low metastatic phenotype. Unlike the parental cells, H-2Kb-positive transfectants are potent inducers and sensitive targets of H-2Kb-restricted syngeneic cytotoxic T cells. Immunization of mice with H-2Kb-positive transfectants conferred protection against a subsequent challenge with Kb-positive transfectants but had only a small effect on growth and metastatic spread of parental cells.
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  • 17
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: In this report we demonstrate that lowered expression of the H-2 antigens on RadLV-induced tumour cells is a result of depressed levels of stable mRNA in these cells. Whether this observation is a result of lowered transcription or of mRNA instability is under investigation. In an effort to determine which viral sequences are essential for mediating both the H-2 regulatory function and the transforming function of RadLV, we have begun to assemble newly integrated proviral genomes from tumours. The restriction enzyme cleavage sites of four isolates are presented; these isolates differ substantially from RadLV genomes previously presented. One of these molecular clones is shown to encode a non-defective B-tropic, ecotropic virus which when reinjected into resistant mouse strains can mediate the up-regulation of H-2Dd antigen expression. Finally, possible mechanisms of H-2 regulation are discussed.
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  • 18
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Expression of beta human chorionic gonadotropin (βhCG) by bladder tumours has been shown to be associated with increased metastases and resistance to treatment with radiotherapy and chemotherapy. Preliminary results from typing frozen tumours using monoclonal antibodies against HLA determinants show reduced or lost expression of one or more antigens in two thirds of patients studied with a trend for more malignant behaviour and inability to generate tumour infiltrating lymphocyte expression using Interleukin-2 in those patients whose tumours demonstrate loss. In this series βhCG expression was only seen in a subgroup of those demonstrating loss of HLA antigen expression. Studies of βhCG secreting bladder cancer cell lines showed that it was possible to induce class II HLA antigen expression with gamma Interferon, and that this treatment but not alpha Interferon reduced βhCG production by the cell line.
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  • 19
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
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  • 20
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    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: mAb KUL/05, a novel murine monoclonal antibody, reacts with molecules displaying the typical tissue distribution and molecular profile of class II MHC antigens. An extensive scrutiny employing serological and immunochemical assays on DR homozygous and DRα- mutant cell lines has shown that this reagent displays some additional, interesting features, namely mAb KUL/05 (a) binds in a broadly monomorphic fashion to cells of DR1 through seven specifities, (b) recognizes a determinant shared by a large proportion of DR, DQ and DPβ chains from most haplotypes, in both their monomeric and α chain-associated forms, and (c) reacts with frozen, acetone-fixed, as well as conventional, formalin-fixed, paraffin embedded tissues. Thus, mAb KUL/05 is likely to represent a useful adjunct for the study of the expression of class II MHC products in normal and pathological tissue specimens.
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  • 21
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Substrains of NZB mice have been compared by Southern blot analysis using several probes. The restriction fragment length polymorphism of probes derived from the Igh-V, Igk-V, Tcrα-C loci and of the long terminal repeat of the mouse mammary tumour virus revealed that NZB/BlLwPtIbm were grossly different from NZB/BlNJ and NZB/BlOla. Comparison with mouse strains of the Igk-V haplotypes a and d suggested that NZB/BiLwPtIbm contain genetic material of the C58 mouse strain.
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  • 22
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    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Kaposi's sarcoma is associated with an increased frequency of HLA-DR5. The hypothesized model of a susceptibility gene in linkage disequilibrium with DR5 may be tested by haplotype analysis in familial Kaposi's sarcoma. Our finding of no common haplotype among afflicted members of a family provides evidence against the hypothesized linkage.
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  • 23
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    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
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    Topics: Biology , Medicine
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  • 24
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    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Magnetic filtration of labelled cells as a way of separating leucocyte subpopulations was tested with a very simple and easy filtration device, using colloidal magnetite as the labelling reagent. In order to quantitate cell enrichment, a double label (both fluorescent and magnetic) was used, under conditions which labelled less than 10% of the cells in the initial sample. Up to 20 million cells were simply passed through a small magnetic filter with a hand-held syringe. Depletion of labelled cells in the suspension that passed through was threefold, and enrichment of labelled cells in the wash of the filter after its removal from the magnet was approximately fivefold. Factors which limited the quality of separation are discussed. Other, more preliminary, experiments found enrichments of 15–to 30-fold with the same colloidal magnetite and hand-held apparatus when the cell labelling system was more selective.
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  • 25
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    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: HLA class I phenotyping was performed using T-lymphocyte populations isolated by immunomagnetic beads (IMBs) coated with monoclonal antibodies with specificity for CD2, CD4 or CD8. The results were compared to those obtained using density gradient-separated lymphocytes (PBL). The typing trays were read by the automated simultaneous double-fluorescence (SDF) technique previously established in our laboratory using an Astroscan 2100 system. The aims of the present study were to establish whether the advantages of IMB lymphocyte separation and automated plate reading by SDF were complementary and whether the results obtained by IMB-SDF and PBL-SDF were concordant.Similarity coefficients for paired results obtained by IMB-SDF and PBL-SDF varied between 0.825 using anti-CD8-coated IMBs and 0.914 using anti-CD4-coated IMBs with a consistent excess of stronger results observed with the PBL-SDF technique. The variations observed did not result in incorrect phenotype assignment but would significantly influence a cross-matching test.These results illustrate the feasibility of using IMB-separated lymphocytes for HLA phenotyping by SDF.
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  • 26
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    International journal of immunogenetics 16 (1989), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Langerhans cells (LC) play an important role in the skin immune system. They are bone marrow-derived and function as the only accessory and antigen-presenting cells in the skin. Several techniques for enriching these cells have been devised, and four, including density gradient centrifugation, use of cell sorter, panning and immunomagnetic separation, are discussed. It is concluded that the most satisfactory method for isolation of LC is based on density gradient centrifugation and the most satisfactory for depletion of epidermal cell preparations for LC is based on the immunomagnetic principle.
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  • 27
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    International journal of immunogenetics 16 (1989), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The bifunctional cross-linking reagent dithiobis (succinimidyl propionate) (DSP) was used to cross-link 125I surface-labelled glycoproteins from viable thymocytes. The cells were solubilized, and the cross-linked material immunoprecipitated and analysed by SDS-PAGE. When DSP cross-linked thymocyte material was immunoprecipitated with either anti-ThB or anti-Ly 5 monoclonal antibodies, and then cleaved, molecules with masses identical to Ly 5 (Mr180 kD) and ThB (Mr 16–18 kD) were obtained. However, if the cross-linker was not cleaved, the intact product had a molecular mass of 〉 200 kD. The identity of these co-precipitated, cross-linked moieties was formally proved by limited proteolysis peptide map analysis. The data indicated that the ThB and Ly 5 antigens were associated on the thymocyte cell surface but no such association could be found on peripheral lymphocytes. The ThB-Ly 5 interaction may indicate an association relevant to the differentiation of thymocytes.
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  • 28
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    International journal of immunogenetics 16 (1989), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: ABH and related antigens appeared a long time ago in the evolution of vertebrates on tissues in contact with the external environment, which suggests that the polymorphism given by these antigens might play a role in the relationships of the species with pathogens. However, they are also oncodevelopmental markers and some recent experimental data suggest that they might play a role in cell-cell recognition at some stages of development. This type of function is difficult to reconcile with the polymorphic nature of these markers unless one considers that the glycosyltransferases necessary for the synthesis of the active structures are encoded by various members of multigene families. Some non-polymorphic members of the families would have their expression limited in time and space during development, leading to the same antigenic patterns in every individual, and these could reappear in some tumours, while the expression of other polymorphic members (A/B/O, H/h, Se/se, Le/le), leading to a variety of antigenic phenotypes, would be expressed at later stages and remain so during the whole life of the individual. The corresponding antigens could disappear from some cancer cells. It is argued that the ABH and related antigens would have primarily been involved in cell-cell recognition phenomena. The polymorphism would have evolved later from gene duplication under environmental pressure, the expression on erythrocytes which occurred very late in evolutionary time probably being of very little biological significance.
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  • 29
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    International journal of immunogenetics 15 (1988), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: IgA2 serum levels were measured by ELISA in 120 healthy subjects from 40 nuclear families (both parents and one offspring). No sex-associated difference was observed. Moreover, the IgA2 serum levels proved to be significantly correlated in parent-offspring pairs (r=0·55; P 〈 0·001), while there was no significant correlation in mother-father pairs of the same family. The data suggest that the serum level of the IgA2 subclass is genetically controlled.
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  • 30
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    International journal of immunogenetics 15 (1988), S. 0 
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: We have utilized a group of MHC class I genes produced by in vitro recombination between Dp and Dd to study recognition of MHC class I molecules by cytolytic T cells (CTLs). Both polyclonal allo-specific and H-2-restricted CTLs require that α1 and a2 of the target class I molecule be derived from the same haplotype for efficient killing. By using T-cell lines we showed that within the bulk population there must exist a fraction of T cells which can recognize epitopes in al or α2. Critical residues for T-cell recognition have been identified using these chimeric genes.
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  • 31
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    International journal of immunogenetics 15 (1988), S. 0 
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    Notes: Transplantation tolerance was induced in mice by inoculating newborn animals with semi-allogeneic haematopoietic cells. The mice rendered tolerant were treated within the first week of birth, or at the time of grafting (age 7–8 weeks), with recombinant interleukin-1 (rIL-1) or interleukin-2 (rIL-2). The effects of these treatments on tolerance induction were monitored in terms of skin allograft survival. Treatment of newborn mice with rIL-2 abolished tolerance induction in nearly all tested animals. When administered at the time of grafting, both rIL-1 and rIL-2 decreased the proportion of tolerant animals. However, these modulation effects of interleukins were only observed in strain combinations with genetic differences at the K end of H-2 or in the entire H-2 complex, in which it is difficult to establish permanent tolerance; no effects of interleukins on tolerance induction were found in a strain combination with a relatively weaker genetic barrier represented by incompatibility at the D region of the H-2 complex.
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    Notes: An example of red cells having no reaction with any Rh antisera was found in a Japanese woman. Results of a serological investigation of the family indicated the action of a ‘regulator’ gene. Her serum contained an antibody which agglutinated all cells of common Rh types, except for Rhnull, by the saline, anti-globulin and papain techniques.
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    Notes: Antigen-specific helper factor (ASHF), a soluble product of T helper (Th) cells, binds antigen and can induce B-cell and cytotoxic T-lymphocyte (CTL) differentiation. Its relationship to the T-cell surface antigen receptor (TcR) is unknown. Both have MHC-restricted recognition of nominal antigen, thus they may share very similar combining sites. Using monoclonal anti-TcR to imrnunoprecipitate partially purified ASHF, we have obtained evidence for shared determinants between ASHF and the TcR. Antigen affinity-enriched supernatants of a Th clone, LB19, are functionally active in antigen-specific, help-dependent CTL assays. FPLC anion exchange salt fractions of these supernatants were 125I-labelled and immunoprecipitated with KJ16.133 monoclonal anti-TcR coupled to Sepharose 4B. Precipitates were analysed by SDS-PAGE. We have obtained clear evidence that functionally active Th culture supernatants contain molecules specifically precipitable by anti-TcR antibody.
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    Notes: Serum IgG antibodies to ovalbumin (OA) and beta-lactoglobulin (BLG) were quantified by ELISA techniques in 22 monozygotic (MZ) and 24 dizygotic (DZ) healthy twin pairs. Antibody levels were comparable in the MZ and DZ groups both for anti-OA and anti-BLG antibodies. The genetic variance (ĜWT) was 0.167 for log IgG anti-OA antibodies, and 0·173 for log IgG anti-BLG antibodies, with heritability estimates of 0·44 and 0·37, respectively. No indication was observed of genotype–environmental interaction or differential environmental covariance for the log antibody levels in the MZ and DZ twins. The anti-OA and anti-BLG antibody levels in the same individual correlated only to a low degree. The levels of naturally occurring serum IgG antibodies are significantly influenced by genetic factors.
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    Notes: The relationship between the immunoglobulin kappa light chain allotypes and autoantibodies was studied in a series of seven human monoclonal kappa-bearing IgM antibodies with Rheumatoid Factor (RF) activity, two IgM anti-low density lipoprotein (LDL) antibodies, and one IgM anti-intermediate filament (IF) antibody. Residues at amino acid positions 153 and 191 related to the Km allotypes in human kappa chains were determined by an HPLC tryptic fingerprint and corroborated by amino acid sequence analysis. All the autoantibodies shared similar variable regions derived from the V gene(s). The seven RF and the anti IF were associated with the Km(3) constant region allotype whereas the two antiLDL were associated with the Km(1,2) allotype. Thus, monoclonal autoantibodies showed the same Km allotypic distribution as the normal population. However, although the number of samples is small, it seems likely that a preferential association may exist between particular V, genes and Km alleles in the generation of autoantibodies with different specificities.
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    Notes: Staphylococcal enterotoxin B (SEB) is a T cell mitogen with properties different from the plant lectin mitogens. We examined the stimulation of mitogenesis induced by SEB in BALB/c mouse spleen cells and its relationship to major histocompatibility complex (MHC) and related cell surface proteins. Based on the ability of specific monoclonal antibodies to block mitogenesis, SEB stimulation appears to be more dependent on interaction with I-E than with I-A class II MHC molecules. Additionally, anti-L3T4, and possibly other antibodies specific for proteins related to the T cell receptor complex, were inhibitory. When A20 cells were treated with SEB and used to stimulate BALB/c spleen cells which were not otherwise exposed to SEB, the treated A20 cells were capable of stimulating mitogenesis of the BALB/c spleen cells. The data support the hypothesis that SEB stimulation is mediated primarily by interactions with class II MHC proteins and possibly proteins in the T cell receptor complex. We also observed that the presence of SEB in DBA/2 (Mlsa)-stimulated BALB/c (Mlsb) spleen cell cultures enhanced the BALB/c mitogenesis three-fold over the sum of the SEB- plus Mls-stimulated mitogenesis. These results suggest that SEB may be a useful tool for further exploration of the Mls response.
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    Notes: In the formation of a repertoire, T cells are selected through a window of autoreactivity which is defined by a low boundary representing the minimal autoreactivity required to enter the T-cell compartment and a high boundary which determines the highest admissible autoreactivity. We propose that the Mls gene product down regulates autoreactivity and thus modifies the formation of the T-cell repertoire. Given the polymorphism of Mls and the assumption that Mlsb is more inhibitory than Mlsd, it is conceivable that Mlsb (responder) mice admit into their T-cell compartment T cells with higher autoreactivity than Mlsd mice. We suggest that it is this highly autoreactive fraction of Mlsb T cells which responds in the overt Mls response. We show that Mls tolerance eliminates T cells responding in the overt Mls response but not T cells responding in the latent Mls response. This is consistent with the finding that T cells responding in the latent Mls response occur in Mlsb as well as in Mlsd mice.
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    Notes: The classification of antigens into TD, TI-1 and TI-2 varieties raises the question of whether responses to these antigens are produced by distinct or identical subpopulations of B cells. In the present study we have examined the extent of intraclonal specificity variation in the progeny of PFC appearing after stimulation with two unrelated antigens. Mouse lymphoid cells were stimulated with pairs of TD and TI antigens, PFC were individually cultured and daughter PFC examined for their specificity. In all combinations used, PFC responding to TD antigen engendered, after 48 h of culture, a high frequency of PFC daughters expressing one or the other antibody specificity, notwithstanding the specificity of parental PFC. However, PFC responding to TI antigens seemed less subject to variation in specificity, and PFC daughters engendered after a 48 h culture period were, in the majority, of the parental specificity. These results are analysed in relation to different subpopulations of B cells.
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    Notes: An association of HLA-DR5 and goitrous autoimmune thyroiditis has been reported elsewhere (Farid et al., 1981; Weissel et al., 1980). Recently, the disease was found to be associated with HLA-DR4 in Newfoundlanders (Farid & Thompson, 1986). In order to find out whether different HLA associations with the disease may be found in different ethnic groups, we have now typed 68 patients with autoimmune goitrous thyroiditis from Eastern Hungary for HLA-A, -B, -C, and -DR antigens; 66 of these patients were also typed for IgG heavy-chain markers (Gm). A significant increase in DR3 (OR = 3·30) and a non-significant increase in DR4 (OR = 1·67) were found in the patients when compared with controls. The Gm3 allele, g, interacted with DR3 to enhance the risk for goitrous autoimmune thyroiditis. Hashimoto's disease may show different associations in different ethnic groups, and indeed within the same ethnic group, when newly diagnosed patients are typed several years apart.
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    Notes: Book reviewed in this article:J. W. Goding: Monoclonal antibodies: Principles and Practice. Production and Application of Monoclonal Antibodies in Cell Biology, Biochemistry and Immunology.W. I. Morrison (Ed.): The Ruminant Immune System in Health and Disease.
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    Notes: Pregnant mice from the congenic strains C57BL/10Sn, B10.BR, B10.A/SgSn, B10.A(SR)/SgSn, B10.A(2R)SgSn and B10.A(18R)Sg were fed Purina Laboratory Chow or the same diet plus approximately 400IU vitamin A daily and given 80 mg/kg dexamethasone intra-peritoneally or a sham injection on the 12th day of pregnancy. It was found that only strains with b alleles between H-2S and H-2D had significantly higher frequencies of isolated cleft palate among their progeny when fed the supplemental vitamin A. The locus appears to be on the centromeric side of a dexamethasone-induced cleft palate gene which has been mapped to the same general area.
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    Notes: Antigen-specific T-cell helper factors were secreted from a (T,G)-A—L specific T-cell line and clones. The factors were released upon antigenic stimulation and could be induced by a low or a high dose of antigen. The factors secreted upon low-dose stimulation possessed the antigenic specificity of the secreting cells, while the high dose-induced factors had a broader antigenic specificity and could react with the closely related polypeptide (Phe,G)-A—L, even when the cells were restricted to (T,G)-A—L. Both the low dose- as well as the high dose-induced factors could not trigger antibody production in the presence of a non-relevant antigen, and did not collaborate with B cells immunized with a non-related antigen for the production of antibodies. The helper factors, like their secreting cells, were H-2-restricted in the collaboration with B cells. In contrast to the helper cells, however, they did not require accessory cells for triggering the B cells in the process of antibody production. Some preparations of helper factors were found to be inactive. The helper activity could be restored by IL-2. Thus, IL-2 is an additional essential factor required for the antigen-specific collaboration of B cells and T-cell helper factors.
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    Notes: Epa-1-specific cytotoxic T lymphocytes (CTL) lyse epidermal cells (EC) of different Epa-1+H-2k strains, such as AKR, CBA, C58, and RF, at different levels. We used an H-2Kk-specific monoclonal antibody (mAb) to test the hypothesis that this phenomenon is due to differences in the H-2-restricting element. Initially, we established the specificity of this mAb for the Epa-1-restricting element by demonstrating its capacity to inhibit the lysis of CBA EC by Epa-1-specific CTL. We then used it as the probe in a cellular radioimmunoassay to quantify the expression of the restricting element by EC of different H-2k strains. We found that C58 and RF EC bound significantly less of the mAb than did CBA EC. Although AKR also bound less of the mAb than did CBA EC, the difference was not statistically significant. To examine the generality of this phenomenon, we quantified the expression of Kk antigens on spleen cells (SC) of the same four strains. We found that RF SC, but not AKR or C58 SC, bound significantly less of the Kk mAb than did CBA SC. Thus, the differential CTL lysis of Epa-1+ EC of different strains probably reflects differences in expression of the H-2-restricting element rather than of the nominal antigen.
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    Notes: Phenotypes positive for G2m(23) but negative for Glm(3) and G3m(5,10,11,13,14) are generally very infrequent in Caucasian populations. We recently Gm typed 372 Australian blood donors, predominantly of European descent, and found two Gm(1;23) and five Gm(1,2;23) individuals among them. This finding suggests that the haplotypes Gm1,17:23;21 and Gm1,2,17,23,21 may occur, in some European populations, with a frequency considerably higher than has been generally assumed.
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    Notes: The cosmid H3.5, containing genes mapping to the murine H-2 Qa region, was used to transfect L cells by the calcium phosphate co-precipitation method. The resultant transfected cells expressed a Qa-like determinant as detected by an immune serum raised against the transfectant cells and Qa specific monoclonal antibodies. Two-dimensional gel analysis revealed the expression of a class I-like heavy chain with a similar molecular mass to the Qa2 antigens of the positive strain B10 and B10.A but with a different isoelectric point. The cosmid H3.5 spans 40 kb of DNA and contains at least one complete Qa region gene which encodes the Qa-like determinant detected in this study.
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    Notes: Control by genes within H-2 of natural resistance to fully virulent salmonellae in susceptible mice was studied by the typhoid relapse model. Susceptible (Itys), H-2 congenic C57BL/10 (B10) lines were infected with a lethal dose of the virulent S. typhimurium C5 and rescued from death by ampicillin therapy, inducing a chronic infection. The response to therapy and its cessation, both early and late in the infection, varied in different strains. B10 (H-Zb) and B10.D2 (H-2d) responded less well to therapy, and were more prone to relapse on its removal, than B10.A (H-2a) or B10.M (H-2f) mice. This haplotype distribution is the same as that previously reported for H-2 linked resistance and susceptibility of similar mice to salmonellae of low virulence. The results indicate that resistance to a virulent salmonella capable of causing natural infection is influenced by genes within the MHC.
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    Notes: A case of recombination between the putative class I ELA antigen series and the strudure(s) governing mixed lymphocyte reactivity in an informative horse family is described. The results of serological typing, ‘lysostripping’ and mixed lymphocyte culture tests strongly suggest that the recombination took place between two loci and is not intragenic. An alloantigenic membrane structure, provisionally called B1, which does not belong to the known ELA series, was also involved in the cross-over. The B1 antigen resembles the class II gene products of other species in two respects: it is not present on platelets, and doantiserum with specificity for B1 inhibits the stimulatory effect of B1-carrying cells in mixed lymphocyte cultures. The B1 antigen does not follow the classical distribution, however, being expressed on both B and T lymphocytes. The finding of separate loci for the first series of ELA antigens and the MLR governing structure(s) demonstrates the similarity of the genetic organization of the horse MHC to that in other species.
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    Notes: HLA-A,B,C and DR antigen frequencies were determined in a group of 188 patients suffering from acute myeloid (AML) and acute lymphoid leukaemia (ALL). These antigen frequencies were compared with those obtained on a panel of normal individuals (n= 109) of the same ethnic origin. The significance of the differences in the antigen distribution and the strength of the associations between particular HLA antigens and the disease were then calculated. The resuks obtained show a decreased frequency of HLA-Awl9 in the overall group of patients and the group of patients with ALL. In addition, the antigen frequency of the HLA-B18 and DRS(DRw11) antigens was also decreased in the overall group of patients and in those patients with AML but not in the patients with ALL. The results suggest that the antigen Aw l9 may confer some degree of resistance to the development of ALL and that the HLA-B18 and/or DR5 antigens may be resistance factors for the development of AML.
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    Notes: Ultraviolet tight (UV)-induced tumours in mice are often highly immunogenic and have unique (individually specific) antigens which cause tumour rejection in normal mice. The molecular nature of these unique ‘rejection’ or ‘transplantation’ antigens is not known. We have recently isolated a syngeneic monoclonal antibody (mAb), CP28, that recognizes a unique tumour-specific antigen on the UV-induced regressor tumour 1591-RE. Further analysis revealed that the antibody-recognized antigen represents a novel major histocompatibility complex (MHC) class I molecule. However, the relationship of this molecule to the unique T cell-recognized antigen that causes tumour rejection remained unresolved. In this study we have explored the relationship of the antibody-defined tumour-specific novel class I molecule to the rejection antigen, that we have previously defined with a cytolytic T cell (CTL) clone (‘anti-A’). Two different lines of evidence suggested a close relationship. First, it was found that random subclones of the 1591-RE tumour expressed different levels of the CP28-defined antigen which correlated with the level of lysis by the anti-A CTL clone. Second, the selection of antigen-loss variants using either the anti-A CTL clone or the mAb CP28 resulted in the simultaneous loss of both the CP28 as well as the ‘A’ antigen. This tight correlation strongly suggests a relationship between the antibody-defined and the T cell-defined antigen. However, the role of the antibody-recognized antigen in causing transplantation rejection still needs to be determined.
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    Notes: K36.16 is an AKR H-2k thymoma which expresses an aberrant H-2Dd-like allospecificity, does not have a detectable amount of the H-2Kk syngeneic antigen and grows very easily in syngeneic mice. By DNA-mediated gene transfer experiments, we were able to obtain transformed clones which do express the H-2Kk molecules and are rejected by AKR mice. Southern hybridization was performed to assess whether any gross changes had occurred in the K36.16 H-2K locus or elsewhere in the MHC, which might explain the lack of H-2K expression and/or the presence of the aberrant H-2Dd-like allospecificity. Specific H-2 class I DNA probes were used to compare the K36.16 genomic DNA with normal AKR thymus DNA after digestion with a variety of restriction enzymes. After hybridization with the pH-2IIa probe a 2.8 kb ‘Hind III’ fragment was identified in the K36.16 genomic DNA which is absent from AKR DNA. The pH-2IIa probe detects the third, transmembrane and cytoplasmic domains of class I genes. Although these changes are indicative of MHC genome modifications it is not yet possible to link these specific Southern blot pattern variations with the phenotypic changes mentioned above.
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    Notes: By means of immunoperoxidase staining of frozen sections 100 primary colorectal carcinomas and 19 metastases were studied for the expression of HLA-A,B,C antigens. A substantial number of the tumours showed a deficient class I expression. The loss of HLA-A,B,C correlated with the degree of de-differentiation.
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    Notes: We have analysed the factors which regulate MHC class II expression in mouse T cell lines. Two such lines, BW 5147 and PLT-24.2, were used in this study. Using 5-azacytidine (5 AzaC) we have shown that hypomethylation of DNA can induce class II antigen synthesis in BW 5147. The expression of class II in PLT-24.2 cells seems to be under a different control mechanism. Southern blot analysis of I-Aβ gene in PLT-24.2 suggests that the expression of class II in this cell line is probably the outcome of a gene rearrangement. We hypothesise that insertion of viral long terminal repeats (LTR) next to the class II genes in transformed T cell lines can act as a promoter for the expression of class II antigens.
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    Notes: Class I and II histocompatibility antigen expression was studied in cryostat sections of biopsy tissues from 15 patients diagnosed as suffering from malignant melanoma, using monoclonal antibodies against HLA class I and II mono-morphic determinants and an indirect immunofluorescence technique. Class I antigens were detected in three of the four primary melanomas and in five of the eleven metastatic melanomas. Class II antigens were expressed only in metastatic melanomas, in three out of eleven cases.Some tumour cell suspensions were obtained and short-term cultures were established. Radiobinding and immunoprecipitation studies were carried out in two cases, named M6 and M8. The results were comparable to those obtained with direct immunofluorescence. We modulated the expression of class I and II HLA antigens with interferon in M6 when adapted to tissue culture. This melanoma was class I and II negative; after IFNγ treatment it became strongly positive for class I and II antigens. In addition we have demonstrated, using Southern blot analysis with the restriction enzymes PvuII and EcoRI, that the M6 melanoma does not have any detectable alterations in its class IIβ genes.
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  • 67
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    International journal of immunogenetics 13 (1986), S. 0 
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    Notes: We investigated the effect of gamma interferon and phorbol ester (TPA), on the expression of HLA class II molecules of myeloid leukaemic cell lines K562, U937, KG-1, HG60 and ML-2. Gamma interferon induced the expression of HLA-DR but not HLA-DQ on HL-60 and ML-2, increased the expression of HLA-DR and DQ on U937 and induced the expression of HLA-DQ on KG-1. TPA treatment did not affect the expression of HLA class II antigens on U937 and KG-I and induced the expression of HLA-DR and HLA-DQ on HL-60 and ML-2. TPA treatment did not affect the HLA phenotype of K562 but gamma interferon did induce HLA class I molecules. Thus, gamma interferon cannot only increase the expression of HLA products already expressed on the cells but can also induce the de novo synthesis of these molecules on myeloid leukaemic cell lines.
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  • 68
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    International journal of immunogenetics 13 (1986), S. 0 
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    Notes: The kinetics of unrestricted killing of normal and leukaemic lymphocyte target cells by a Qa-lb-specific murine cytotoxic T lymphocyte (CTL) clone were evaluated in a manner analogous to enzyme kinetic assays in which the effector and target cells corresponded to the enzyme and substrate, respectively. In order to apply the enzyme-substrate analogy to clonal cytolytic reactions, it was first established that the lytic reactions exhibited initial steady-state velocity of lysis at the effector and target cell concentrations used. The lytic reaction maintained linearity for velocity of lysis during the first 90 min of incubation, then plateaued. Vmax (the maximal rate of target cell lysis achieved by a given effector population) and K, (the target cell number resulting in 1/2Vmax) values were determined over a wide range of target and effector cell concentrations. Both parameters were found to be directly proportional to the number of effector cells. At a given concentration of cloned CTL, the lytic parameters of Vmax and K, were not significantly different for normal or leukaemic target cells that express Qa-lb. Additional kinetic parameters for lysis of normal and leukaemic target cells by a cloned CTL were also compared. The lytic efficiency of the CTL clone (i.e. maximal killing rate with an infinite number of targets) and the intrinsic anity between effector and target cells were the same with either normal or leukaemic targets. However, the maximal lysis of target cells at an infinite number of effectors was significantly less for normal compared with leukaemic targets. This suggests that the normal target cells were more heterogeneous in their expression of the target (Qa-1b, antigen. Enzyme-like kinetic analysis of cell-mediated lysis reactions can be useful for comparing the relative affinities of effector and target cells obtained from various sources.
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  • 69
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    Notes: A family with two members with selective IgA2 deficiency was analysed by direct gene analysis with different probes for the IgCH region. No gross gene deletions or rearrangements were detected. Genetic analysis based on serological and molecular markers did not rule out linkage with the IgCH region. However, a defect of other genes not linked to the Ig heavy chain region and controlling the expression of IgA may be possible as well.
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  • 70
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    Notes: Book Review in this articleM. W. Strickberger: Genetics. Collier Macmillan, New York, London. 1985. ISBN 0-02-418120-X. Price £l5.95.
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  • 71
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    International journal of immunogenetics 12 (1985), S. 0 
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    Notes: Methodologies are described for the production and characterization of monoclonal antibodies to human haemoglobin. Three monoclonal antibodies are described, two of which recognize distinct determinants on the α-chain subunit. A third monoclonal antibody, Hb-2d, recognizes a determinant expressed on human β-chain. The Hb-2d determinant is shared by human and baboon haemoglobins, but is not expressed by haemoglobins from beef, goose, pig, rabbit, sheep, dog, rat or mouse. Monoclonal antibody Hb-2d will bind to haemoglobin A2 but not to foetal haemoglobin suggesting that δ- but not γ-chain also expresses the Hb-2d determinant. The results of testing a limited panel of human haemoglobin variants is presented.
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  • 72
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    Notes: C57BL/10 (abbreviation B10) female mice give a high primary popliteal lymph node (PLN) response to syngeneic male thymocytes. The PLN response to the H-Y antigen is suppressed if B10 females are primed by an intraperitoneal injection of syngeneic male cells. Suppression of the response can be induced by priming with not only syngeneic B10 male thymocytes but also allogeneic thymocytes which share the H-2D locus of the H-2b haplotype with the responder (Db restriction). On the other hand, B10.D2, B10.A, and HTO female mice, giving a low primary PLN response to H-Y, give high secondary PLN responses when primed intraperitoneally with syngeneic male thymocytes. A high secondary response can also be obtained by priming with allogeneic male thymocytes which share the K/i〉 end loci (K, Aβ, Aα, Eβ, and Eα) of the H-2 complex with the responder. Apparently the male thymocytes used for priming must share class I (and possibly class II) H-2 loci with the female recipients to enable the recognition of the H-Y antigen and subsequent development of the genetically determined type (suppression or amplification) of the secondary PLN response.
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  • 73
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    Notes: The t haplotypes of mouse chromosome 17 bear a number of interesting mutations and rearrangements, some of which map close to the H-2 complex. Since there are many H-2 class I genes of unknown function, we have investigated their arrangement in t haplotypes using genomic Southern blots. We present a detailed chart of the H-2w30(tw12) complex, and compare it with the arrangement in other t haplotypes and standard mouse haplotypes. The chart shows duplications, deletions, and reshuffling of conserved and divergent regions. The two major features of the t arrangement-large deletions in the Qa and Tla regions–have analogues in some standard strains, so it is unlikely that these deletions are responsible for t-specific phenotypes. The differences between t and standard mouse strains are similar, in nature and in degree, to those between different standard strains.
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  • 74
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    Notes: Using monoclonal antibodies, mouse peritoneal neutrophils were typed for the presence of 23 cell surface alloantigens, the expression of which was quantitated by flow cytofluorometry and compared with that of lymphocytes. The H-2K and H-2D alloantigens and β2-microglobulin were present on all neutrophils, but Ia and Qa antigens were not detected. It was found that Ly-5.1, Ly-15.2, Ly-21.2, Ly-24.2 (Pgp-1) and Ly-25.1 were present on 〉90% of neutropils; Ly-6.2 and Ly-27.2 were absent, but Ly-28.2 (encoded by an Ly-6 linked gene), was present on 〉90% of neutrophils. As expected, the lymphocyte-specific antigens Ly-1.1, Ly-2.2, Ly-3.1, Ly-7.2, Ly-12.1 and Thy-1.2 were absent from the neutrophils. When compared with lymphocytes, marked differences in alloantigen expression on neutrophils were seen for Ly-5.1, Ly-24.2 and Ly-28.2. These studies should be of value in the study of neutrophil structure and function.
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  • 75
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    Notes: The allotypic markers of immunoglobulin heavy chains (Gm, Am and Em allotypes) provide important contributions to the differentiation between populations, and they are informative for tracing racial origin, migration and admixture of isolates and stray groups. The combined Glm; G2m; G3m; A2m; Em haplotypes are a highly polymorphic system that is a powerful tool in population genetics because of the existence of haplotypes that are unique for a particular race. In this paper, data on Gypsies living in Hungary are compared with those obtained in other populations, in particular Hindus and non-Hindus from India. The analysis agrees with anthropological and philological evidence for population movements from Asia to Europe.
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  • 76
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    Notes: Efforts were made to generate hybridomas producing monoclonal antibodies against the RT2a, RT2b and RT3a antigens of the rat. While a number of hybridomas from each of five different fusions was found to produce antibodies against the RT2b antigen, no hybridoma producing antibody to the RT2a antigen could be detected among those generated in six different fusions. No stable hybridoma secreting antibody specific for the RT3a antigen could be established in three different fusions, although one positive culture was detected. In the course of this work, a monoclonal antibody against a new antigenic specificity was detected in one of the two strain combinations in which the anti-RT2b antibodies were raised. The locus controlling this antigen, which was designated RT9, maps 4.9 (2.2-12.6) cM from RT2.
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  • 77
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    International journal of immunogenetics 11 (1984), S. 0 
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    Notes: NIM-M8 is a monoclonla IgM antibody, specific for the LWab antigen as shown by its reaction with red cells of all donors except those lacking LWa, LWb and LWab. Indirect immunofluorescent staining and cell sorter analyses have shown that LWab is present on a subpopulation of human lymphoctes. Cell fractionation studies indicate that subsets of both B and T cells express LWab and it may, therefore, provide a further marker for heterogeneity in these lymphocyte populations.
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  • 78
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    Notes: Responsiveness to a thymus-independent (TI-1) antigen, TNP-LPS, was investigated in the high and low responder lines of mice resulting from four independent selective breedings carried out for antibody production to various complex natural immunogens (selections I, III, IV and V). The superiority of the high responder vs. the low responder line was generally observed, confirming that the genes accumulated through selective breeding can modify the responsiveness to unrelated antigens including TI antigens.Two special features were observed in selection III: (1) A secondary response to TNP-LPS: higher peak values and IgG isotype antibody production were obtained in the H line. (2) Pretreatment with LPS modified the responses to TNP in the L line only.
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  • 79
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    Notes: Alloreactive cytolytic T cell clones were generated from mixed leucocyte reactions (MLRs) between unrelated individuals. Two clones exhibited proliferative responses specific for class I HLA antigens B21 and B17. They were also found to be cytolytic toward cells bearing these HLA-B antigens as measured in cell-mediated lympholysis (CML) assays. Four clones exhibited primed lymphocyte test (PLT) and CML activity specific for various class II HLA antigens, namely DR1, DR5, DQw3 and DRw53. For each of these six clones, the CML specificity was identical to the PLT specificity. Both class I and class II specific clones released interleukin-2 (IL-2) upon restimulation with irradiated cells carrying the relevant HLA specificity. This stimulator-induced IL-2 release showed the same specificity pattern as that observed in the PLT assay. Monoclonal antibody (mAb) inhibition studies on alloreactive T cell clones showed similar inhibition profiles of PLT, CML and IL-2 release assays. These findings suggest that cytolytic activity, secondary proliferation and IL-2 release by alloactivated T cells may be induced by the same HLA encoded determinant.
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  • 80
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    Notes: Immunoprecipitation using a monoclonal antibody showed that the Wrb antigen is present on the abnormal (δ-α) hybrid sialoglycoprotein of Sta-positive human erythrocytes but not on the abnormal (δ-α) hybrid sialoglycoprotein of Dantu-positive erythrocytes. These results provide further information regarding the nature and location of the Wrb antigen on the normal erythrocyte sialoglycoprotein α.
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  • 81
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    International journal of immunogenetics 11 (1984), S. 0 
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    Notes: We studied structural and functional characteristics of lymphocytes from adult and fetal baboons (Papio cynocephalus). Flow cytometry with monoclonal antibodies to human lymphocyte antigens and plant lectins was used to define expression of surface antigens on lymphocytes from adult and 140 day fetal baboons (term = 180 days). Major T cell antigenic determinants on adult and fetal baboon lymphocytes were the Tp50, Tp32-45, and p45 glycoproteins detected by monoclonal reagents T11, OKT8, and OKT10 respectively. Baboon T lymphocytes did not react with the OKT3/anti-Leu4 or OKT4/ anti-Leu3a reagents which detect, respectively, Tp19-29 and Tp55, major surface glycoproteins on human T lymphocytes. OKT6, which identifies the human TL antigen equivalent on thymocytes, did not react with baboon thymocytes. These data demonstrate major evolutionary divergence between human and baboon T lymphocytes. By contrast, baboon lymphocytes resembled human peripheral lymphocytes in reactivities with several non-T cell reagents. Lectin binding studies revealed substantially fewer peanut agglutinin-and wheat germ agglutinin-binding cells in suspensions of baboon fetal splenocytes and adult peripheral lymphocytes compared with fetal thymocytes. Thereffore, maturation of baboon T lymphocytes is associated with loss of surface carbohydrate structures that bind these lectins. Adult and fetal baboon lymphocytes resembled human and murine lymphocytes in their capabilities to respond to mitogens and to produce interleukin-2. As in oter species, adult, but not fetal baboon lymphocytes, mediated NK activity against a variety of nucleated target cells. Despite divergence in lymphocyte antigen epression, babbon lymphocyte functional development colsely parallels that seen in humans.
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  • 82
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    Notes: The Gm, Am and Km immunoglobulin allotypes and ABO blood groups were studied in three groups of Tunisian Berbers.The results showed that the actual Berbers of Tunisia present certain heterogeneity and their ancestors were probably the first inhabitants of North Africa. Indeed, although their Gm-Am haplotypes are mainly Caucasoid, some of them are typically African.The group of Kesra village, the most Caucasoid, shows frequencies of Gm-Am haplotypes very close to those of South European populations, particularly the Spanish, who are probably of the same origin. The gene frequencies of the ABO groups in the three Berber groups were similar to those recorded in European populations with a relatively high frequency of the O genes typical of the Berbers.
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  • 83
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    Notes: Monoclonal antibody 212.i.4.2 mediated complement-dependent lysis of spleen and lymph node cells carrying the tw1, tw12, tw71, t6, tw73, and tLub1 haplotypes, while cells from mice carrying 11 other t haplotypes were not lysed. The antibody also detected an epitope controlled by genes in the H-2Dd region of non-t mice. A molecule of 46,000 molecular weight was immunoprecipitated by 212.i.4.2 from detergent extracts of 125I-labelled spleen cells of +/tw12 and B10.D2 mice. The H-2dm2 mutation did not alter the expression of the epitope recognized by 212.i.4.2. However, the H-2dm1 mutation decreased the reactivity of lymphoid cells with the antibody in cytotoxicity tests, and 212.i.4.2 immunoprecipitated little or no protein from extracts of B10.D2(R106) spleen cells which carry the H-2dm1 mutation.
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  • 84
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    Notes: Spleen cells from Balb/c mice given multiple injections of intact human erythrocytes (group O, NN) were fused with NS1 myeloma cells. Culture fluids from the resulting hybrid cells were screened for agglutinating antibody against a panel of erythrocytes. One cell line, 2/23, secreted an IgM antibody which reacted more strongly with NN than with MM cells. Neuraminidase or papain treatment of erythrocytes abolished agglutination whereas trypsin treatment did not. Reactions with U-erythrocytes of different MN phenotypes confirmed the anti-N specificity of monoclonal antibody 2/23. This is the first report of monoclonal anti-N stimulated by the immunization of mice with intact erythrocytes.
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    Notes: Spleen cells from 30 individual murine irradiation chimeras of the type (P1 x P2)F1→ P1 were compared in a rosetting assay for H-2K and H-2D cell surface antigen expression with normal (P1 x P2)F1 hybrid controls. Eleven out of the 30 chimeras were in the normal range, but the other 19 differed from F1 controls by 4- to 100-fold in endpoint titre for at least one H-2K or H-2D antigen. Every possible class of variation was found, i.e. up or down variation of H-2K or H-2D antigens of P1 or P2 type. This evidence, together with data from T6 chromosome marker experiments which also showed full reconstitution of lethally irradiated P1 recipients by (P1 x P2)F1 donor lymphomyloid stem cells, suggested that incomplete reconstitution was not the cause of H-2 antigenic variation.Low expression of P2 H-2 antigens on spleen cells derived from (P1 x P2)F1→ P1 chimeras was investigated further. Fifteen lethally irradiated (P1 x P2)F1 recipients of bone marrow cells from two such chimeras were all of normal F1 H-2 phenotype when tested 10-12 weeks after reconstitution, thus excluding stable, low P2 H-2-expressing variant F1 stem cells as a cause of the phenomenon. If P1 recipients were hyperimmunized against P2 cells before lethal irradiation and reconstitution with (P1 x P2)F1 stem cells, there were significantly fewer Till-McCulloch colonies in their spleens 10 days after reconstitution than in spleens of unimmunized controls. Also 〉 90% of immunized recients died by 6 weeks after stem cell injection but two survivors both showed very low levels of P2 H-2K and H-2D antigens. These results together with previously published evidence of anti-P2 Tc cell activity and P2 skin graft rejection in (P1 x P2)F1→ P1 chimeras suggested that residual anti-P2 immunological capability in lethally irradiated P1 recipients may be associated with low P2 H-2 expression on their F1-derived spleen cells, although the mechanism does not involve selection of stable, variant F1 stem cells. The mechanism(s) of other classes of variation in H-2 expression in (P1 x P2)F1→ P1 chimeras were not investigated.
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    Notes: RNA was extracted from the splenocytes of Brucella abortus antigen stimulated mice and of control mice. The proportion of chromatographically separated polyadenylated 11.2S mRNA, was determined. With the technique used, only stimulated mice exhibited significant amounts of this RNA species. The highest level was reached 1 day after the stimulation, and the decay from this level presented an oscillatory form during the 4 weeks following the injection.In two different genetic backgrounds, H-2b mice did not respond to the stimulus, in contrast to H-2a and H-2f mice. H-2b/H-2f heterozygotes behaved roughly as intermediate between H-2b and H-2f mice. This genetic control seems to parallel the genetic control of some Brucella-induced, thymus-dependent events previously described.
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    Notes: Book Reviews in this ArticleR. WITKOWSKI and O. PROKOP: Genetik erblicher Syndrome und Mgbildungen. Worterbuch fur die Familienberatung.
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    Notes: Monoclonal anti-Ia inhibition experiments were conducted to confirm and extend genetic mapping data of I-A gene control of immunity to human haemoglobin (Hb). It was found that the Aβ gene is of critical importance in conferring immunity to the α-chain and β-chain subunits of Hb. A possible involvement of I-E region genes in B10.D2 mice to β-chain is discussed. Through the use of an α-chain specific T cell clone data, is obtained indicating that an intact Ia.8+ Aβ chain is necessary for antigen presentation in vitro.
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    International journal of immunogenetics 10 (1983), S. 0 
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    Notes: C4 is composed of two tightly linked genes (C4A and C4B) lying within the major histocompatibility complex of chromosome 6 that can be demonstrated by agarose gel electrophoresis. Seven alleles and five alleles at the C4A and C4B loci, respectively, were detected in 169 black individuals from the southeastern United States. Furthermore, the phenotypic frequencies of C4A6, C4A5, C4A4, C4B4, C4B3, and C4BQO were significantly different between black and white Americans.
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    Notes: Two B complex genotypes, B1B1 and B19B19, of outbred line S1, were tested for low and high immune response to GAT, from which four recombinants were recovered: B1B1 GAT-hi and lo, and B19B19 GAT-hi and -lo. Also included in the study were birds of B2B2 genotype with an intermediate level of immune response to GAT.A total of 225 birds of these groups were challenged with the Bryan strain of Rous Sarcoma virus subgroup C, RSV (RAV-7), by inoculation into the wing web at five weeks of age. The B1B1 genotype had the lowest percentage of regressors (17.6%), B19B19 had the highest (42.2%), and the B2B2 genotype was intermediate (23.7%). Combining the results of GAT response over the B1B1 and B19B19 genotypes, 14.0% of GAT-lo and 37.8% of GAT-hi regressed their tumours, respectively. The highly significant (P ≤ 0.01) difference between the combined GAT-hi and -lo groups would suggest that the Rs locus controlling tumour regression induced by the subgroup C virus is closely linked to the region controlling immune response to GAT, but the data also provides evidence that the B-F region of the B complex also plays an important role in RSV-induced tumour regression.
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    Notes: Surface immunoglobulin on spleen cells from NZB and NZB/W mice and congenic mice bearing the nude or X-linked immune defective (Xid) gene was examined by flow microfluorometry with regard to both the frequency of positive cells and density expressed on the cell. These data indicate that although the frequency of unseparated sIg+ B lymphocytes is equivalent among all of these groups of mice, the densities of sIgM and sIgD are different. Spleen cells from these mice were also separated by free-flow electrophoresis and analyzed in a similar manner. This analysis demonstrated the absence of a subpopulation of B lymphocytes with a low electrophoretic mobility and low expression of sIgM. These studies suggest that maturational and/or activation states of the B cells in mice bearing the Xid or nude genes are different from those seen in the parent strains of mice. Such alterations in cell-surface antigens correlate with differences in the natural history of immunopathology of the autoimmune disease in these congenic colonies of New Zealand mice.
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    Notes: Fifty-five Caucasoid patients with polymalgia rheumatica (PMR) or giant cell arteritis (GCA) were immunoglobulin (Gm) allotyped for this study. Forty-four of these patients had been previously HLA-A,B,C and DR locus allotyped. The incidence of the immunoglobulin allotypic marker Glm(2) was significantly increased in the GCA group (50.00% v. controls 18.75%, P= 〈0.01). There was a similar but insignificant rise of this Gm marker in the PMR group (27.24% v. 18.75%, NS). The increase in Glm(2) in the GCA group was not accompanied by a corresponding rise in the number of people homozygous for Glm(2), i.e., all the increase could be attributed to patients with the Glm(1,2,3): G3m(5,10,21) phenotype.
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  • 93
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    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 10 (1983), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The strains B 10.S(7R), B 10.S(23 R) and B 10.S(24R), all thought to be genetically identical, differ in levels of susceptibility to infection with Trichinella spiralis. In a series of nine independent experiments, B 10.S(7R) was shown to be more susceptible than the other two strains. In another series of seven experiments, the strain B 10.A(18R) was shown to be more susceptible to infection with T. spiralis than the strains B 10.S(21R) or B 10.BAR-5, all of which were thought to share common H-2 alleles. These results indicate that a gene mapping between the S and D loci influences susceptibility to infection with T. spiralis. Typing of these strains for Qa and Tl loci rule out the possibility of a double crossover accounting for the differences observed. The new gene is designated Ts-2. Previously published data have also been reinterpreted and another gene Ts-1 is shown to be associated with the Aβ locus. When the d allele is expressed at the Ts-2 locus, strains of mice expressing s, q, f or b alleles at Ts-1 are rendered more susceptible to infection.
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  • 94
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 10 (1983), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 95
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 10 (1983), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 96
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 10 (1983), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: IgG and IgA heavy chain allotypes were determined in the sera of 483 Caucasian Type 1 diabetes patients and 503 Caucasian healthy controls. There was no significant difference between patients and controls neither on the level of Gm phenotype frequencies nor on the level of Gm three-locus and two-locus haplotype frequencies. A selective IgA deficiency was found in 14 patients (2.9%) but in none of the control individuals (P〈10-4).
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  • 97
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 10 (1983), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Gm allotypes were detected and quantitated by radioimmunoassay (RIA) in paired serum and CSF samples from patients suffering from various neurological diseases. Of 115 patients with neurological disorders (65 MS and 50 others), seven subjects displayed one or two allotypes in their CSF which were absent in serum. The Gm phenotype in the patient's serum allowed us to infer the genotype without the need of familial data. A comparison of the regression curves obtained in RIA from the unexpected allotype in CSF and the counterpart in a normal serum pool argued for an identity of the Gm antigen carried by both inhibitory molecules. The unexpected allotype(s) in CSF can be considered as the product of a latent Gm gene which may be activated by either immune perturbations due to the disease per se or some particular immune regulations in the central nervous system.
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  • 98
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 10 (1983), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Book reviewed in this article:N. Catsimpoolas; Cell Analysis. Plenum Publishing CorpJ.W.Shay: Techniques In Somatic Cell Genetics
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  • 99
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    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 10 (1983), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Immunoprecipitaon studies of the rhesus monkey major histocompatibility system have shown that the RhLA-DR locus codes for class II antigens with molecular features that are homologous to the class II antigens coded for by the human HLA-dR locus, The products of another alloantigenic RhLA-linked locus of the rhesus monkey, called ‘48’, is provisionally characterized as a class I system.
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  • 100
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 10 (1983), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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