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  • 1980-1984  (29)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Immunogenetics 10 (1980), S. 363-372 
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Spleen cells from a (BALB/cxC57BL/6)F1 mouse immunized with CBA/J spleen cells were fused with the myeloma cell line NS-1. One of the six established hybrid cell lines continuously secreted antibody that recognized a new antigenic specificity, tentatively called “Ly-10.1”. This newly found antigen is expressed on thymocytes, on splenic T and B cells, on bone-marrow cells, and on the cells derived from brain, kidney and liver. It is also expressed on a continuous cell line, 416B, with stem-cell characteristics. The unique tissue distribution and, furthermore, a distinct strain distribution pattern distinguishes Ly-10.1 from any known murine lymphocyte alloantigen. On the basis of reactivity with cells of the C57BL/6-Lyt-1a congenic strain, one gene governing Ly-10 expression is assigned to the Lyt-1 region of chromosome 19.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Immunogenetics 11 (1980), S. 351-362 
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Somatic cell hybridization of NS.1 nonsecretor myeloma cells with spleen cells of (DBA/2 × C57BL/6)F1 mice immunized against the myeloma MOPC 70A of BALB/c mice led to the establishment of five hybridoma clones which continuously secrete anti-MOPC 70A cytotoxic antibodies. The respective antigen detected by each of the five monoclonal antibodies is expressed both on plasmacytomas and on antibody-secreting cells as the only normal cell type. The tissue distribution of this new antigen is different from that reported for the alloantigen PC.1, and we have therefore designated it as PC.2. On the basis of immune elimination of direct and indirect plaque-forming cells, all mouse strains tested express PC.2 determinants, identifying PC.2 essentially as an autoantigen. Conventional anti-PC.1 alloantiserum contains antibodies to the PC.2 determinant, and these antibodies are distinguishable from the anti-PC.1 antibodies proper by the fact that only the latter are absorbed by liver cells. Monoclonal anti-PC.2 antibodies are not directed against MuLV-(murine leukemia virus) —associated antigens as over 20 ecotropic, several MCF (mink colony forming) recombinant, and xenotropic viruses failed to react in immunofluorescence assays.
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  • 3
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Spleen cells from an SJL mouse immunized with 70'/3 cells, an established pre-B cell line, were fused with cells of the nonsecretor myeloma line NS.1. One established hybridoma cell line (clone K10.6) continuously secreted antibody that recognized a new antigenic specificity tentatively named Ly-m19. This newly found antigen is detectable on both T and B cells. Cytotoxicity assays reveal that 75 percent of the spleen and lymph-node cells, 35 percent of bone-marrow cells, and 15 percent of thymus cells reacted with antibody of clone K10.6. Strains expressing the specificity Ly-m19.1 are characterized by negative reactions and include the strains AKR, CE/J, RF/J, GR/A, SJL, P/J, BDP/J, and LG/J. All other strains so far tested are Ly-m19.2. This strain distribution pattern distinguishes Ly-m19 from any known murine lymphocyte alloantigen, but it parallels the Lyb-2 c haplotype. Linkage test of a set of AKXL recombinant inbred strains revealed close linkage of Ly-m19 and Lyb-2 loci on mouse chromosome 4.
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  • 4
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Five monoclonal antibodies were established by the fusion of mouse myeloma cells (NS.1) with spleen cells from A and (A x C3H/An)F1 mice hyperimmunized with 70Z/3 tumor cells. These antibodies recognized a new antigenic specificity provisionally called Ly-m20.2. In direct cytotoxicity assays, 60 percent of cells in spleen, 40 percent in lymph node, 50 percent in bone marrow and less than 5 percent in thymus were found to react with three of the five antibodies, whereas the two others yielded somewhat lower cytotoxicity indices. The Ly-m20.2 antigen was also expressed on cells derived from liver and kidney but not on cells derived from brain. As judged from cytotoxicity assays with separated T and B cells, Ly-m20.2 antigen is carried preferentially on B lymphocytes. Direct plaque-forming cells (PFC) were completely eliminated by Ly-m20.2-specific antibody and complement. Linkage tests by analysis in 20 (CBA/J x C3H/An) x C3H/An backcross mice and by segregation analysis of BXH and SWXL recombinant inbred strains indicate close association of the loci controlling Ly-m20.2 and Mls antigens on chromosome 1.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Immunogenetics 13 (1981), S. 547-554 
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Spleen cells from C3H/An mice immunized with spleen cells of C57BL/6-H-2 k mice were fused with myeloma cell line NS.1. One established hybrid cell line continuously secreted antibody that recognized a new surface antigen provisionally called Ly-m18. The new alloantigen is expressed on 90 percent of thymus cells, 55 percent of spleen cells, and 45 percent of either lymphnode or bone-marrow cells. It is also expressed on cells derived from brain, kidney, and liver. Fifty percent of either peripheral T or B cells express the Ly-m18 antigen, and some tumor cell lines with T, B, pre-B or stem cell characteristics are Ly-m18 (+). The strain distribution pattern distinguishes Ly-m1 8 antigen from all other murine lymphocyte alloantigens. The typing data of two sets of CXB and AKXL recombinant inbred strains indicate that the Ly-m18 gene is linked to the Ltw-2 locus which has not yet been assigned to a chromosome.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Immunogenetics 14 (1981), S. 445-447 
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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  • 7
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Immunogenetics 17 (1983), S. 211-214 
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Immunogenetics 11 (1980), S. 373-381 
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Three monoclonal antibodies were produced by fusing mouse myeloma cell line NS-1 with spleen cells from C3H/An mice hyperimmunized with B6-H-2k spleen cells. These antibodies recognized an alloantigen displaying a similar strain distribution pattern to the Ly-6.2 and Ala-1.2 alloantigens. Analysis of C×B and B×H recombinant inbred mice revealed close linkage of genes controlling Ly-m6 and Ly-6. The monoclonal antibodies lysed 70 percent of cells in lymph nodes and 60 percent in spleen in direct cytotoxicity assays, but did not lyse significant numbers of cells of thymus and bone marrow. Separated T and B cells were reactive with the antibodies, but T cells were more sensitive to the antibody and complement than B cells. Virtually all cells in cultures of cells activated in the mixed lymphocyte reaction or by Concanavalin A were reactive with the monoclonal antibodies. Direct plaque-forming cells were completely eliminated by the monoclonal antibody and complement. By absorption tests, cells from all organs tested so far (thymus, lymph node, spleen, bone marrow, brain, kidney and liver) were shown to express the Ly-m6 determinant. Tumor cell lines with T, B or stem cell characteristics were reactive with the monoclonal antibody by direct cytotoxicity and absorption assays.
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  • 10
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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