alexa HLA linked with leprosy in southern China: HLA-linked resistance alleles to leprosy.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Wang LM, Kimura A, Satoh M, Mineshita S

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Abstract According to the World Health Organization recommended multidrug therapy (WHO/MDT), we have carried out this study to investigate the presence of HLA-linked susceptibility or resistance to leprosy in a southern Chinese population. Sixty-nine leprosy patients and 112 healthy controls participated in the study. HLA-DR2 subtypes, HLA-B and MHC Class I chain-related A (MICA) alleles were typed at the DNA level using the polymerase chain reaction-single strand conformation polymorphism method. The frequencies of HLA-DR2-DRB1 alleles did not show any significant differences between the patient and the control groups, suggesting that the disease susceptibility was not associated with the DR2 subtypes in this southern Chinese population. On the other hand, in the multibacillary (MB) patients significantly decreased allele frequencies of HLA-B46 (0.040 in MB patients vs 0.129 in controls) and MICA-A5 (0.200 vs 0.380) were observed compared with the healthy controls. The calculated relative risk (RR) for B46 was 0.28; for MICA-A5, 0.52. In addition, on haplotype analysis the frequency of the HLA-B46/MICA-A5 haplotype was significantly decreased in the MB patients compared to controls (0.060 vs 0.233, RR = 0.22, p < 0.01). These results suggest that an HLA-linked disease-resistant gene to MB leprosy in southern China is in strong linkage disequilibrium with the HLA-B46/MICA-A5 haplotype. In other words, the resistant gene may be located near the HLA-B/MICA region and not in the HLA-DR locus.
This article was published in Int J Lepr Other Mycobact Dis and referenced in Journal of Antivirals & Antiretrovirals

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