T cell receptor signaling pathway is overexpressed in CD4 + T cells from HAM/TSP individuals
Braz. j. infect. dis
;
19(6): 578-584, Nov.-Dec. 2015. tab, graf
Article
in English
| LILACS
| ID: lil-769622
ABSTRACT
ABSTRACT Human T-lymphotropic virus type 1 (HTLV-1) is a human retrovirus related to the chronic neuroinflammatory disease HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). CD4+ T cells activation appears to play a key role on HTLV-1 infection. Here we investigated the expression of genes associated to T cell activation CD3e molecule, epsilon (CD3?), lymphocyte-specific protein tyrosine kinase (LCK), vav 1 guanine nucleotide exchange factor (VAV1), and zeta-chain (TCR) associated protein kinase 70 kDa (ZAP70) on T lymphocytes of HTLV-1-infected individuals and compared to healthy uninfected individuals (CT). We observed that CD3?, LCK, ZAP70, and VAV1 gene expression were increased in CD4+ T cells from HAM/TSP group compared to HTLV-1 asymptomatic patients (HAC). Moreover, ZAP70 and VAV1 were also upregulated in HAM/TSP compared to CT group. We detected a positive correlation among all these genes. We also observed that CD3?, LCK, and VAV1 genes had a positive correlation with the proviral load (PVL) and Tax expression. These results suggest that PVL and Tax protein could drive CD3?, LCK, and VAV1 gene expression in CD4+ T cells, and these genes function on a synchronized way on the CD4+ T cell activation. The elucidation of the mechanisms underlying T cell receptor signaling pathway is of considerable interest and might lead to new insights into the mechanism of HAM/TSP.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Receptors, Antigen, T-Cell
/
Paraparesis, Tropical Spastic
/
Signal Transduction
/
Gene Expression Profiling
Type of study:
Observational study
/
Risk factors
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Language:
English
Journal:
Braz. j. infect. dis
Journal subject:
Communicable Diseases
Year:
2015
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Centro de Terapia Celular e Centro Regional de Hemoterapia de Ribeirão Preto/BR
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