The Journal of Immunology, Vol 144, Issue 12 4536-4540, Copyright © 1990 by American Association of Immunologists

ARTICLES

Inhibitory effect of herpes simplex virus infection to target cells on recognition of minor histocompatibility antigens by cytotoxic T lymphocytes

K Kuzushima, K Isobe, T Morishima, A Takatsuki and I Nakashima
Department of Immunology, Nagoya University School of Medicine, Japan.

Target cell lysis by CTL specific for minor histocompatibility Ag (minor HA), which were generated in (C3H/He x BALB/c)F1 mice immunized with A/J mouse spleen cells, was dramatically reduced by infection of HSV to Neuro-2a (A/J mouse origin) cells as target. The reduction was apparent at 5 h after infection of HSV to target cells, when many viral proteins were produced in the cells. Conversely, MHC-restricted HSV- specific CTL-mediated cell lysis increased time dependently. Using an RNA virus, vesicular stomatitis virus, significant reduction of minor specific CTL-mediated target cell lysis was also found. During the time when this reduction of target cell lysis by HSV occurred, the surface expression of class I H-2Dd molecules was maintained, and anti-H-2a allo-MHC-specific CTL lysed HSV-infected Neuro-2a cells as strongly as uninfected Neuro-2a cells. When HSV-infected or uninfected Neuro-2a cells were treated with Brefeldin A that selectively blocks transportation of newly synthesized proteins out of endoplasmic reticulum, both HSV- and minor HA-specific CTL-mediated cell lyses were blocked. These observations demonstrated that minor HA are continuously synthesized and associated with class I molecules at pre-Golgi and transported via trans Golgi system with quick turnover, and that newly synthesized HSV Ag, which are also associated with class I molecules and transported via the same system, should take the place of intrinsic minor HA and be presented on the surface of the cells to be recognized by MHC-restricted CTL.

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