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  • Title: Positive association of major histocompatibility complex class I chain-related gene A polymorphism with leukemia susceptibility in the people of Han nationality of Southern China.
    Author: Luo QZ, Lin L, Gong Z, Mei B, Xu YJ, Huo Z, Yu P.
    Journal: Tissue Antigens; 2011 Sep; 78(3):178-84. PubMed ID: 21810082.
    Abstract:
    To assess the potential contribution of major histocompatibility complex class I chain-related gene A (MICA) polymorphisms toward the pathogenesis of leukemia, 107 leukemia patients and 162 ethnically matched controls from Hunan province, Southern China, were genotyped for the MICA polymorphism using polymerase chain reaction-sequence-specific priming (PCR-SSP) and sequence-based typing (PCR-SBT). The relevance between these genotypes and risk of leukemia was assessed by means of odds ratio (OR) with 95% confidence intervals (95% CIs). Allele frequencies of MICA-sequence and MICA-STR were different in leukemia patients in comparison with normal controls (both P < 0.05). MICA A5 was directly associated with leukemia (OR = 2.3257, Pc < 0.0005), whereas MICA A5.1 and MICA*008 were inversely associated with leukemia (OR = 0.5874, Pc = 0.0235 and OR = 0.5874, Pc = 0.0329, respectively). In addition, we found that homozygotes for MICA A5 (OR = 14.0659, 95% CI: 3.1627-62.5574, Pc < 0.0001) and MICA*010 (OR = 10.1053, 95% CI: 2.2139-46.1260, Pc < 0.0004) were at an increased risk for leukemia, whereas heterozygotes for MICA*008 and MICA A5.1 were linked to a decreased risk for leukemia (OR = 0.4609, 95% CI: 0.2799-0.7590, Pc = 0.0027). MICA allelic variation is associated with leukemia in Hunan Han population; the data also suggest that MICA gene polymorphism affects susceptibility to different clinical subtypes of leukemia.
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