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Article Abstract
Introduction: Acquired aplastic anemia (AA), a heterogeneous bone marrow (BM) failure disease, is mainly mediated by the immune destruction of hematopoietic stem cells (HSCs). Given the predominant role of immunosuppressive therapy (IST) in AA, it is sensible to theorize that variants of cytokine genes might affect the outcome of IST.
Methods: In this study, we analyzed three single nucleotide polymorphisms (SNPs) of interleukin (IL)-10 gene in promoter region to clarify their relationship with susceptibility, clinical efficacy and prognosis of AA.
Results: We observed that CT genotype of IL-10 rs1800896 was associated with a decreased risk of AA (adjusted OR = 0.541 [95% CI 0.295-0.993], p = .047). Besides, the disease severity differed considerably by IL-10 gene promoter genotypes and alleles. Furthermore, IL-10 SNPs influenced efficacy of IST, with unfavorable response exhibited by rs1800871 and rs1800872 in dominant models (GG + AG vs. AA, adjusted OR = 0.409 [95% CI 0.178-0.943, p = .036] for rs1800871 and GG + GT vs. TT, adjusted OR = 0.396 [95% CI 0.173-0.909, p = .028] for rs1800872, respectively).
Conclusion: The polymorphisms of IL-10 promoter region were informatively genetic risk factors which might be conducive to the insights into the mechanisms of AA and the design of individual regimens.
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