Increased expression of alpha 4 beta 1 and alpha 5 beta 1 integrins on HTLV-I-infected lymphocytes.
Journal Article (Journal Article)
T cells interact with the extracellular matrix via integrin receptors and these interactions affect both cellular localization and proliferation. The importance of these interactions in retrovirus-induced diseases, however, remains less clear. In the present study, we investigated changes in T cell adhesion to extracellular matrix proteins by HTLV-I expressing cell lines and human peripheral blood lymphocytes infected with HTLV-I by cocultivation. Cell lines and acutely infected primary peripheral blood lymphocytes demonstrated enhanced adhesion to fibronectin. Acute infection of peripheral blood lymphocytes increased the expression of alpha 5 beta 1 and alpha 4 beta 1 integrins. Antibodies to the alpha 4, alpha 5, and beta 1 subunits inhibited attachment of infected cells to fibronectin. We conclude that HTLV-I infection is associated with an increase in the expression of both the classical fibronectin receptor and the receptor for the alternatively spliced domain of fibronectin on peripheral blood lymphocytes. HTLV-I-related alterations in cell surface adhesion molecules may contribute to the abnormal proliferation of T cells in adult T cell leukemia (ATL) or to the abnormal localization of activated or infected T cells to the central nervous system of patients with tropical spastic paraparesis/HTLV-I-associated myelopathy (TSP/HAM).
Full Text
Duke Authors
Cited Authors
- Dhawan, S; Weeks, BS; Abbasi, F; Gralnick, HR; Notkins, AL; Klotman, ME; Yamada, KM; Klotman, PE
Published Date
- December 1993
Published In
Volume / Issue
- 197 / 2
Start / End Page
- 778 - 781
PubMed ID
- 7504369
International Standard Serial Number (ISSN)
- 0042-6822
Digital Object Identifier (DOI)
- 10.1006/viro.1993.1656
Language
- eng
Conference Location
- United States