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  • Articles  (87,550)
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  • Articles  (87,550)
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  • 1
    Electronic Resource
    Electronic Resource
    PCR SSCP REVEALS HAPLOTYPE RELATED POLYMORPHISM OF PERB 1: A NEW MARKER FOR MHC β BLOCK TYPING (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Many new Major Histocompatibility Complex (MHC) genes have been discovered in the last 5 years. Defining the polymorphism of these new genes may elucidate their function and their relevance to diseases with MHC associations. Polymerase chain reaction and single stranded conformation polymorphism (PCR SSCP) analyses were used to detect sequence polymorphisms of PERB1 demonstrated by comparing the available genomic sequence of four haplotypes. This study showed that PCR SSCP of PERB 1 is reproducible. In addition, PERB1 alleles segregate within families together with MHC haplotypes. Typing results from the Forth Asia and Oceania Histocompatibility Workshop (4AOHW) cell panel indicate that the identified polymorphisms of PERB 1 are ‘haplotypic’, i.e., unrelated individuals carrying the same MHC ancestral haplotypes carry the same PERB1 SSCP pattern. Interestingly, PERB1 SSCP patterns allow the distinction of ancestral haplotypes which share HLA-B serological specificities, such as HLA-B44 and therefore this analysis can be used to further define MHC haplotypes and thus to improve our understanding of the evolution of this complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00216.x
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  • 2
    Electronic Resource
    Electronic Resource
    THE ASSOCIATION BETWEEN COELIAC DISEASE, DERMATITIS HERPETIFORMIS AND CERTAIN HLA-ANTIGENS IN ICELANDERS (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Twenty-eight cases of coeliac disease (CD) and seven of dermatitis herpetiformis (DH) have been verified in Iceland. Standard serological techniques were used for HLA typing. Twenty-five individuals with CD were typed, 21 (84%) of whom carried DR3, DQ2. Twelve of these 25 (48%) had DR3, DR7, DQ2, which makes them possibly homozygous for DQ2, and suggests that homozygosity of DQ2 increases the risk for CD. The four DH patients that were typed all had HLA-B8, DR3, DQ2. It is concluded that CD and DH are associated with DR3, DQZ in Icelanders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00218.x
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  • 3
    Electronic Resource
    Electronic Resource
    T CELL RECEPTOR DELTA LOCUS POLYMORPHISM IN RHEUMATOID ARTHRITIS (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: In order to identify new susceptibility markers for Rheumatoid Arthritis (RA), we analysed the dinucleotide repeat polymorphism at the T cell receptor delta locus (TCRD) in 65 RA patients and 99 healthy Belgian controls. A significant under-representation of the A4-A5 TCRD genotype was observed in the RA population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00221.x
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  • 4
    Electronic Resource
    Electronic Resource
    ANNOUNCEMENTS (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00224.x
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  • 5
    Electronic Resource
    Electronic Resource
    THE FIRST HLA ANTHROPOLOGICAL STUDY IN THE KUWAITI POPULATION (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: HLA antigens of the Kuwaiti population are not as well characterized as those of other international ethnic groups. We present results for HLA typing of Kuwaiti individuals using commercial Biotest sera. Six hundred and seventy one Kuwaiti were typed for HLA-A, -B, -C antigens and 399 were typed for HLA-DR, -DQ antigens. Antigen frequency and gene frequency were computed for each phenotype observed. The antigens with the highest frequencies were HLA-A2, A1 and A3; B5, B12 and B7; Cw″4 and Cw-l; DR52, DR5, DR3 and DR7; DQ1 and DQ2. HLA haplotypes with strong linkage disequilibrium and characteristic of Kuwaiti population are A2-B5, A1-B8, B7-DR7 and B8-DR3. A comparison study with other populations is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00200.x
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  • 6
    Electronic Resource
    Electronic Resource
    MOLECULAR ANALYSIS OF CYP21 GENE MUTATIONS CARRIED ON HLA-B14 POSITIVE HAPLOTYPES (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: HLA-B14 positive haplotypes have increased frequencies in a group of patients with puberty disorders, IgA deficiency and cancer of the ovary. Clinical investigations demonstrated that all these patients have high values of 170H progesteron after the ACTH test which suggests an alterated function of 21 hydroxylase enzyme. In order to investigate whether these B14 positive haplotypes carry the same CYP21 mutation in the various diseases and controls, we have amplified by polymerase chain reaction (PCR) the sections of CYP21B gene which include amino acid positions 172 and 281 where typical mutations are known to occur in 21 hydroxylase deficiency. The presence or absence of the defined mutations was tested by oligonucleotide hybridization using oligonucleotides, labelled with DIG-ddUTP, designed to hybridize with the mutated or with the normal sequence. It was found that regardless of whether the subject tested was a patient or a healthy control the mutation at position 281 was found in all cases carrying HLA-B14, DR1 haplotype. Interestingly, this mutation does not seem to be in association with HLA-B14, DR7 haplotype.These findings suggest that CYP21 gene plays a role in all these differing diseases although it must be stressed that there may be alternative explanations for the observed data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00204.x
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  • 7
    Electronic Resource
    Electronic Resource
    Gm and Km PHENOTYPE FREQUENCIES IN CHILDREN WITH CHRONIC ACTIVE HEPATITIS (CAH) B VIRUS INFECTION (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Patients with CAH, extrahepatic HBV manifestation and healthy children were studied for presence of Gm 1,2,3,10,21 factors and Km 1 factor. Significantly higher frequency of Gm (1, 2, 3, 10, 21) phenotype was shown in CAH group as compared with the other two groups. Relationship between Km factors and examined groups was not found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00207.x
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  • 8
    Electronic Resource
    Electronic Resource
    British Society for Histocompatibility and Immunogenetics (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00211.x
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  • 9
    Electronic Resource
    Electronic Resource
    HLA-DQA1 AND DQB 1 ALLELE AND GENOTYPE CONTRIBUTION TO IDDM SUSCEPTIBILITY IN AN ETHNICALLY MIXED POPULATION (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: HLA-DRB1, DQA1 and DQB1 alleles have been determined in 42 families with one IDDM proband and 64 healthy controls, by oligotyping (PCR-SSO) using primers and probes from the XI International Histocompatibility Workshop. A positive DRB1 *03 and DRB1 *04 association with the disease was observed, whereas DRB 1*11 and DRB 1 *07 showed negative association but 19% of patients carried DRB1 alleles different to DRB 1 *03 or *04. When single alleles were considered, DQA1 *03 showed the strongest association with susceptibility to the disease (RR = 8.2, Pc = 0.00001) but this association was outgrown by 2 and 3 allele combinations, with genotype DRB 1 *04-DQA 1 *03-DQB1*0302/DRB1*03- DQA 1*0501- DQB 1*0201 showing the strongest association (RR = 28, Pc = 0.002). Application of the relative predispositional effect (RPE) method to our data, revealed a further susceptibility risk provided by the DRB1*13-DQA1*0102-DQB 1*0604 haplotype once DR3 and DR4 haplotypes were removed. When DQA1-DQB1 genotypes were analysed for presence of Arg 52 (DQ α) and absence of Asp 57 (DQ β), genotypes SS/SS were found significantly increased in diabetics. Interestingly, one of the strongest associations with the disease was observed with the DQA 1*03-DQB 1*0201 combination encoded mainly by genes in trans (RR = 11.7 Pc = 0.00004). These observations and their comparison with DR-DQ haplotypes in more homogeneous ethnic groups support the stronger influence of the DQ molecule rather than the individual DR or DQ alleles in the susceptibility to IDDM. They also emphasize the need for detailed HLA haplotype studies in non-Caucasian and ethnically mixed populations to gain further insight into the nature of genetic and environmental factors contribution to autoimmunity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00213.x
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  • 10
    Electronic Resource
    Electronic Resource
    TNF Nco-I RFLP IS NOT AN INDEPENDENT RISK FACTOR IN RHEUMATOID ARTHRITIS (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The human TNF genes are located within the MHC class-III region on chromosome 6. The presence or absence of an Nco-I restriction site in the 5’ non-coding sequence of the TNFβ gene defines two alleles (TNFB*1 and TNFB*2). The segregation of these alleles has been associated with levels of TNFα or TNFβ production in systemic lupus erythematosis (SLE), insulin-dependent diabetes mellitus (IDDM) and in healthy control individuals.Rheumatoid arthritis (RA) is characterized by high levels of TNFα within the synovial fluid and to address the question of whether this could be brought about by a genetic predisposition to high TNF production by RA individuals, we examined the distribution of this Nco-I polymorphism in 98 healthy volunteers and 123 patients with active rheumatoid arthritis. No difference was observed between the normal and RA groups with respect to haplotype segregation or allelic frequency. Furthermore, no difference was observed between DR4+ or DR4- individuals in the control or RA groups.These data demonstrate that the high level of TNFα seen in the joints of RA patients is unlikely to be due to a genetic predisposition of these patients to high TNFα production, as defined by the TNF Nco-I restriction fragment length polymorphism (RFLP).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00219.x
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