Association of IL-10 Gene Polymorphisms and Human T Lymphotropic Virus Type I-Associated Myelopathy/tropical Spastic Paraparesis in North-East of Iran (Mashhad).
The underlying mechanisms leading to the development of human T-cell lymphotropic virus type I (HTLV-I) associated myelopathy/tropical spastic paraparesis (HAM/TSP) in HTLV-I infected individuals are not fully understood. Host genetic factors appear to be involved as risk factors for developing HAM/TSP. We investigated the possible contribution of interleukin-10 (IL-10) as a risk factor to HAM/TSP by comparing frequencies of promoter region single nucleotide polymorphisms in HTLV-I infected Iranian patients who either remained asymptomatic or developed HAM/TSP and asymptomatic HTLV-I carriers. Healthy, uninfected individuals from the same region served as healthy controls. Significant differences were observed in the distribution of IL-10 promoter alleles and genotypes at position -819 and -592 between HAM/TSP patients and healthy controls (P=0.01), and between HTLV-I carriers and healthy controls (P=0.02). The frequency of the low IL-10 producer haplotype (-1082*A, -819*T, -592*A) was significantly associated with HTLV-I carriage or HAM/TSP compared with healthy controls (P=0.02 and 0.01, respectively). Our results suggest that IL-10 -819*T and -592*A alleles are significant risk factors for developing HTLLV-I infection but do not appear to convey additional risk for developing HAM/TSP.
Department of Hematology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Abbas
A
Shirdel
Neurology Department, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Mahmoud Reza
MR
Azarpazhooh
Rheumatic Diseases Research Centre, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Maryam
M
Sahebari
Immunology Research Centre, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Mohsen
M
Ghanbari
Rheumatic Diseases Research Centre, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Seyedeh Zahra
SZ
Mirfeizi
Immunology Research Group, Faculty of Life Sciences, The University of Manchester, United Kingdom.
Ian
I
Hutchinson
Immunology Research Centre, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Aghigh
A
Ziaee
Inflammation and Inflammatory Disease Research Centre, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Houshang
H
Rafatpanah
Gene; HAM/TSP; HTLV-I; IL-10; Polymorphisms