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Association of a T-cell receptor constant alpha chain gene polymorphism with progression of IgA nephropathy in Japanese patients.
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- Author(s): Deenitchina SS;Deenitchina SS; Shinozaki M; Hirano T; Ando T; Hirakata H; Kiyohara Y; Katafuchi R; Fujishima M
- Source:
American journal of kidney diseases : the official journal of the National Kidney Foundation [Am J Kidney Dis] 1999 Aug; Vol. 34 (2), pp. 279-88.- Publication Type:
Journal Article; Research Support, Non-U.S. Gov't- Language:
English - Source:
- Additional Information
- Source: Publisher: W.B. Saunders Country of Publication: United States NLM ID: 8110075 Publication Model: Print Cited Medium: Internet ISSN: 1523-6838 (Electronic) Linking ISSN: 02726386 NLM ISO Abbreviation: Am J Kidney Dis Subsets: MEDLINE
- Publication Information: Publication: Philadelphia Pa : W.B. Saunders
Original Publication: New York, N.Y. : Grune & Stratton, c1981- - Subject Terms: Polymorphism, Genetic*; Glomerulonephritis, IGA/*genetics ; Receptors, Antigen, T-Cell, alpha-beta/*genetics; Adult ; Disease Progression ; Female ; Gene Frequency ; Genotype ; Glomerulonephritis, IGA/complications ; Glomerulonephritis, IGA/ethnology ; Humans ; Japan ; Kidney Failure, Chronic/etiology ; Kidney Failure, Chronic/genetics ; Male ; Middle Aged ; Polymerase Chain Reaction ; Polymorphism, Restriction Fragment Length ; Prognosis ; Sequence Analysis, DNA
- Abstract: Immunogenetic studies have suggested the role of the T-cell receptor (TCR) in the development of immune-mediated diseases. We investigated whether a genetic polymorphism in the TCR constant alpha (Calpha) chain region might modify the susceptibility or progression of immunoglobulin A (IgA) nephropathy. The TCR Calpha chain genotype was studied in 213 Japanese patients with IgA nephropathy and 73 individuals from the general population. A polymerase chain reaction-based TaqI restriction fragment length polymorphism assay (TaqI RFLP) was applied on the 5' flanking region of the TCR Calpha first exon. The TaqI-undigested (t) and TaqI-digested (T) alleles showed similar genotype distributions between the patients with IgA nephropathy and controls (tt:Tt:TT = 16.9%:46.5%:36.6% in IgA nephropathy v 9.6%:58.9%:31.5% in controls; chi(2) = 1.9; P = not significant). To further investigate the role of TCR Calpha chain gene polymorphism in renal prognosis, we analyzed those patients with IgA nephropathy in whom renal status had been monitored for a period of more than 3 years (n = 182). According to outcome, two groups were formed. The stable (S) group included 98 patients with renal function that remained unchanged during an average follow-up of 10.7 +/- 0.4 (SE) years. The progressive (P) group (n = 84) included patients with progressively declining renal function, with an average follow-up of 11.9 +/- 0.5 years. The genotype distributions of the TCR Calpha chain gene polymorphisms between these two groups differed significantly (tt:Tt:TT = 25.5%:40.8%:33.7% in S v 10.7%:44.1%:45.2% in P; chi(2) = 7.0; P < 0.05). The frequency of the T allele was greater in the P group (67.3% in P v 54.1% in S; chi(2) = 6.6; P = 0.01). The TT or Tt genotypes were more commonly observed in patients from the P group (89.3% of T allele carriers in P v 74.5% in S; chi(2) = 6.5; P = 0.01). It appeared the T allele might foreshadow a poor renal prognosis, conferring a potential risk for developing renal failure with time (odds ratio, 2.7; confidence interval, 1.2 to 6.0; P < 0.05). In summary, TCR Calpha chain genetic variability was associated with loss of renal function over time in patients with IgA nephropathy. In conclusion, the TCR Calpha chain polymorphism might prove helpful to predict progression to chronic renal failure in Japanese patients with IgA nephropathy.
- Accession Number: 0 (Receptors, Antigen, T-Cell, alpha-beta)
- Publication Date: Date Created: 19990804 Date Completed: 19990823 Latest Revision: 20190815
- Publication Date: 20231215
- Accession Number: 10.1016/s0272-6386(99)70356-2
- Accession Number: 10430975
- Source:
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