TY - JOUR
T1 - HIV-1 infection ex vivo accelerates measles virus infection by upregulating signaling lymphocytic activation molecule (SLAM) in CD4+ T Cells
AU - Mitsuki, Yu Ya
AU - Terahara, Kazutaka
AU - Shibusawa, Kentaro
AU - Yamamoto, Takuya
AU - Tsuchiya, Takatsugu
AU - Mizukoshi, Fuminori
AU - Ishige, Masayuki
AU - Okada, Seiji
AU - Kobayashi, Kazuo
AU - Morikawa, Yuko
AU - Nakayama, Tetsuo
AU - Takeda, Makoto
AU - Yanagi, Yusuke
AU - Tsunetsugu-Yokota, Yasuko
PY - 2012/7
Y1 - 2012/7
N2 - Measles virus (MV) infection in children harboring human immunodeficiency virus type 1 (HIV-1) is often fatal, even in the presence of neutralizing antibodies; however, the underlying mechanisms are unclear. Therefore, the aim of the present study was to examine the interaction between HIV-1 and wild-type MV (MVwt) or an MV vaccine strain (MVvac) during dual infection. The results showed that the frequencies of MVwt- and MVvac-infected CD4+ T cells within the resting peripheral blood mononuclear cells (PBMCs) were increased 3- to 4-fold after HIV-1 infection, and this was associated with a marked upregulation of signaling lymphocytic activation molecule (SLAM) expression on CD4+ T cells but not on CD8+ T cells. SLAM upregulation was induced by infection with a replication-competent HIV-1 isolate comprising both the X4 and R5 types and to a lesser extent by a pseudotyped HIV-1 infection. Notably, SLAM upregulation was observed in HIV-infected as well as -uninfected CD4+ T cells and was abrogated by the removal of HLA-DR+ cells from the PBMC culture. Furthermore, SLAM upregulation did not occur in uninfected PBMCs cultured together with HIV-infected PBMCs in compartments separated by a permeable membrane, indicating that no soluble factors were involved. Rather, CD4+ T cell activation mediated through direct contact with dendritic cells via leukocyte function-associated molecule 1 (LFA-1)/intercellular adhesion molecule 1 (ICAM-1) and LFA-3/CD2 was critical. Thus, HIV-1 infection induces a high level of SLAM expression on CD4+ T cells, which may enhance their susceptibility to MV and exacerbate measles in coinfected individuals.
AB - Measles virus (MV) infection in children harboring human immunodeficiency virus type 1 (HIV-1) is often fatal, even in the presence of neutralizing antibodies; however, the underlying mechanisms are unclear. Therefore, the aim of the present study was to examine the interaction between HIV-1 and wild-type MV (MVwt) or an MV vaccine strain (MVvac) during dual infection. The results showed that the frequencies of MVwt- and MVvac-infected CD4+ T cells within the resting peripheral blood mononuclear cells (PBMCs) were increased 3- to 4-fold after HIV-1 infection, and this was associated with a marked upregulation of signaling lymphocytic activation molecule (SLAM) expression on CD4+ T cells but not on CD8+ T cells. SLAM upregulation was induced by infection with a replication-competent HIV-1 isolate comprising both the X4 and R5 types and to a lesser extent by a pseudotyped HIV-1 infection. Notably, SLAM upregulation was observed in HIV-infected as well as -uninfected CD4+ T cells and was abrogated by the removal of HLA-DR+ cells from the PBMC culture. Furthermore, SLAM upregulation did not occur in uninfected PBMCs cultured together with HIV-infected PBMCs in compartments separated by a permeable membrane, indicating that no soluble factors were involved. Rather, CD4+ T cell activation mediated through direct contact with dendritic cells via leukocyte function-associated molecule 1 (LFA-1)/intercellular adhesion molecule 1 (ICAM-1) and LFA-3/CD2 was critical. Thus, HIV-1 infection induces a high level of SLAM expression on CD4+ T cells, which may enhance their susceptibility to MV and exacerbate measles in coinfected individuals.
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U2 - 10.1128/JVI.06681-11
DO - 10.1128/JVI.06681-11
M3 - Article
C2 - 22532682
AN - SCOPUS:84864138513
VL - 86
SP - 7227
EP - 7234
JO - Journal of Virology
JF - Journal of Virology
SN - 0022-538X
IS - 13
ER -