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© Research
Publication : Journal of medical virology

The FAS-670 AA genotype is associated with high proviral load in peruvian HAM/TSP patients.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of medical virology - 01 Apr 2017

Rosado J, Morales S, López G, Clark D, Verdonck K, Gotuzzo E, Van Camp G, Talledo M,

Link to Pubmed [PMID] – 27603042

Link to DOI – 10.1002/jmv.24681

J Med Virol 2017 04; 89(4): 726-731

Human T-lymphotropic virus 1 (HTLV-1) is the etiologic agent of the HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Apoptosis is a mechanism of defense elicited by many triggers, including cross-linking of the FAS receptor expressed in viruses-infected cells, and the ligand FASL presented by T-cytotoxic cells. As HAM/TSP has been associated with high levels of proviral load (PVL), we hypothesized that certain genotypes of single-nucleotide polymorphisms (SNPs) associated with a decreased protein expression of FAS and FASL could be risk factors for this disease. Three SNPs: FAS-670A/G (rs1800682), FAS-1377G/A (rs2234767), and FASL-844C/T (rs763110) were analyzed in 73 HAM/TSP patients and 143 HTLV-1 asymptomatic carriers. Ancestry informative markers were used to adjust for ethnicity through a principal component analysis. Gender, age, PVL, and the first three principal components were used as covariates. The FAS/FASL genotype distribution was not associated with HAM/TSP presence (P-> 0.05). The FAS-670 AA genotype was associated with high PVL in comparison to FAS-670 GG in HAM/TSP patients (P = 0.015), while in asymptomatic carriers low levels of PVL were observed (P > 0.05). Our findings suggest that rs1800682, rs2234767, and rs763110 genotypes are not associated with the presence of HAM/TSP, but that the FAS-670 AA genotype can promote higher PVL values in HAM/TSP patients. J. Med. Virol. 89:726-731, 2017. © 2016 Wiley Periodicals, Inc.

https://pubmed.ncbi.nlm.nih.gov/27603042