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At least 343 records · Page 19Linked to original sources

PubMed1995

Immunogenetic analysis of the human leukocyte antigen DQA1 locus in patients with duodenal ulcer or chronic atrophic gastritis harbouring Helicobacter pylori.

AIM: To examine the human leukocyte antigen (HLA)-DQA1 locus in patients harbouring Helicobacter pylori with chronic atrophic gastritis or duodenal ulcer as part of an investigation into immunogenetic differences in the host. SUBJECTS AND METHODS: We examined 116 patients harbouring H. pylori (55 patients with chronic atrophic gastritis, 61 with duodenal ulcers) and 28 H. pylori-negative healthy controls for HLA-DQA1 genotypes. H. pylori infection was determined by culturing biopsy samples from the gastric body and antrum and by enzyme-linked immunosorbent assay. HLA-DQA1 typing was carried out by the polymerase chain reaction-restriction fragment length polymorphism method. RESULTS: The allele frequency of DQA1*0102 was significantly higher in H. pylori-negative controls (0.250) than in H. pylori-positive duodenal ulcer patients (0.090). In contrast, the allele frequency of DQA1*0301 was significantly lower in H. pylori-negative controls (0.214) than in H. pylori-positive duodenal ulcer patients (0.418). CONCLUSION: These results suggest that there are genetic differences in the HLA-DQA1 locus between H. pylori-positive duodenal ulcer patients and H. pylori-negative healthy controls.

Adult↗

PubMedDate not supplied

[An analysis of the associational connections of immunogenetic blood markers with lymphogranulomatosis in Armenians].

A study of 11 immunogenetical blood systems (HLA-A, B C, DR; ABO; Rh-Hr; MNSs; Kidd; Kell-Chellano; Duffy; Lewis; Diego; Gm; Inv) involving 59 antigens was performed in patients of Armenian nationality with lymphogranulomatosis (LGM). Pathogenic associations of HLA, MNSs and Duffy systems with LGM were established. Positive correlations were found (p < 0.001) with HLA phenotypes DR-8, B-14, B-21, SS, Fy(a+b-). These phenotypes have significant correlation with LGM (RR = 4.7-2.1) and can be considered as genetic markers of LGM in the Armenian population.

Adolescent↗

PubMed1997

[Clinical immunogenetics of stomach cancer in Western Siberia].

An immunogenetic examination of 86 cases of stomach cancer established a correlation between predisposition and resistance, on the one hand, and the distribution of allele sets of HLA-genes (classes I and II), on the other. The relationship was found to vary according to sex and age. The most significant relationships with respect to predisposition were identified for HLA-B51 (RR = 19.82) alleles and allele combinations of HLA-DRI-DR7 (RR = 25.52) and HLA-A9-DRI (RR = 33.67). High relative risk of stomach cancer was attributed to the absence of relevant alleles in 91 patients included into the group of comparison. Also, combinations of allele sets were identified in healthy subjects which never occur in stomach cancer patients. The results provide a substantiation for developing an automated system of interpreting HLA-typing data which are instrumental in evaluating the patient's predisposition, resistance and prognosis.

Adult↗

PubMedDate not supplied

[The prognosis of the development of recurrent bronchitis based on immunogenetic indices].

It is worthy to carry out the prognosis of recurrent bronchitis development on the basis of immunogenetic markers. It was shown that HLA-A10 and B13 antigens occurred in Dnepropetrovsk Province significantly more often and HLA-A19, B12, B15, and B21 antigens more rare than in European population. It has been demonstrated that HLA-B35, HLA-B38 and HLA-B-blanks are found with significantly higher frequency in patients with recurrent bronchitis and it has been associated with low immune indices. HLA-B40 and Cw2 antigens were found as protective against development of recurrent bronchitis.

Bronchitis↗

PubMed1997

Immunogenetic aspects of ANCA-associated vasculitides. Editorial overview.

The objective of this issue is to review the genetic bases and immunogenetic variations of antineutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAV), with particular emphasis on major histocompatibility complex class I and II molecules, the polymorphisms in the intercellular adhesion molecule-1 gene, tumor necrosis factor genes, alpha-1-antitrypsin (alpha1AT) and Fcgamma receptor (FcgammaR) genes. Although the aetiologies of the various AAV are unknown, the available genetic epidemiological data support the importance of genetic factors in susceptibility to these diseases. Moreover, there is considerable reason to believe that immunologic mechanisms contribute to the pathogenesis of AAV. The data presented here indicate that, in addition to immunospecific genes, such as HLA alleles, genes determining the level of the immune response (i.e. cytokines, adhesion molecules, protease inhibitors, FcgammaR) may contribute to AAV.

Antibodies, Antineutrophil Cytoplasmic↗

PubMed1998

Autoimmune orchitis, epididymitis, and vasitis are immunogenetically distinct lesions.

Experimental allergic orchitis (EAO), the principle animal model of noninfectious testicular inflammatory disease, is a genetically determined phenotype. Classical EAO, induced by inoculation with testicular homogenate and the appropriate adjuvants, is characterized by inflammatory infiltrates in the testis (orchitis), epididymis (epididymitis), and vas deferens (vasitis). In this study, the genetic control of susceptibility and resistance to these three lesions was analyzed in the mouse. The results obtained with independent inbred strains and H2 congenic mice show that the genetic control of all three lesions is complex and involves both H2 and non-H2-linked genes. Whole-genome exclusion mapping was performed on a backcross population segregating for all three phenotypes. Permutation-derived thresholds provided experimentwise, chromosomewise, comparisonwise, and marker-specific chromosomewise thresholds for declaration of significant regions linked to marker loci. Unique loci were identified on chromosome 8 for orchitis, chromosome 16 for epididymitis, and chromosome 1 for vasitis and have been designated as Orch6, Epd1, and Vas1, respectively. These results show that autoimmune orchitis, epididymitis, and vasitis are immunogenetically distinct lesions.

Animals↗

PubMedDate not supplied

Clinical, laboratory and immunogenetic aspects of post-traumatic psoriatic arthritis: a study of 25 patients.

OBJECTIVE: In a previous study we demonstrated that the prevalence of trauma preceding arthritis was higher in patients with psoriatic arthritis (PsA) than in patients with rheumatoid arthritis (RA) or ankylosing spondylitis (AS); of 300 consecutive patients with PsA, 25 (8%) had a history of trauma before (< 3 months) the onset of the disease. The present study was carried out to characterize the clinical, laboratory and immunogenetic profiles of post-traumatic (PT)-PsA. PATIENTS AND METHODS: The clinical and laboratory features of 25 patients with PT-PsA were studied at onset (first 6 months) and after a follow-up period of 1-7 years, and were compared with those of 275 PsA patients without any history of trauma (nonPT-PsA). HLA typing was performed in PT-PsA patients, and synovial fluid (SF) analysis, including interleukin (IL)-1 and IL-6 determinations, was carried out in 12 subjects with PT-PsA and in 32 with nonPT-PsA. RESULTS: No differences were observed between PT-PsA and nonPT-PsA patients with regard to their clinical evolution. ESR (p < 0.0001) and CRP (p = 0.005) were higher in PT-PsA than in nonPT-PsA patients at disease onset but not after follow-up. No differences were found in the other blood indices. SF analysis revealed higher IL-6 levels in PT-PsA than in nonPT-PsA patients (p < 0.0005). CONCLUSION: Our study demonstrates that the prevalence of trauma preceding arthritis is higher in PsA than in RA or AS. Clinical and laboratory findings in patients with PT-PsA differed from those with nonPT-PsA only at disease onset (first six months), however, showing an abrupt clinical presentation and a more acute phase response. This pattern may be related to the higher levels of IL-6 found in the SF of PT-PsA than in nonPT-PsA patients. However, during the follow-up period the two groups became indistinguishable, and no difference was observed between PT-PsA and nonPT-PsA regarding the evolution of the disease.

Accidental Falls↗

PubMed1980