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J Virol. 1988 June; 62(6): 2102-2106

T4+ T helper cell function in vivo: differential requirement for induction of antiviral cytotoxic T-cell and antibody responses.

R Ahmed, L D Butler and L Bhatti

Department of Microbiology and Immunology, University of California-Los Angeles School of Medicine 90024-1747.

ABSTRACT

This study documents the differential requirements of T4+ T helper cells in the induction of virus-specific cytotoxic T-lymphocyte (CTL) and antibody responses during acute lymphocytic choriomeningitis virus infection. Two monoclonal antibodies (GK1.5 and RL172.4) directed against the L3T4 (T4) molecule were used for depleting T helper cells from mice. Depletion of T4+ cells caused a pronounced suppression of antiviral antibody response (20-fold decrease) but had minimal effect on virus-specific CTL response (less than 2-fold reduction). Despite the elimination of greater than 90% of T helper cells, anti-L3T4-treated mice were able to generate a CTL response of sufficient magnitude to control the viral infection. In contrast, depletion of Lyt2+ T cells abrogated the CTL response and the ability to eliminate virus. Thus, our results underscore the importance of the Lyt2+ T-cell subset in controlling infection with this virus and show that a deficiency of T4+ T cells is likely to have a more severe effect on antibody production than on CTL responses.


J Virol. 1988 June; 62(6): 2102-2106




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