1999 Fiscal Year Final Research Report Summary

Studies on the effect of HSV-1 on apoptosis and cell cycle

Research Project

Project/Area Number	10670724
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Pediatrics
Research Institution	Mie University
Principal Investigator	ITO Masahiro Mie University, Faculty of Medicine, Associate Professor, 医学部, 助教授 (10120156)
Project Period (FY)	1998 – 1999
Keywords	HSV-1 / apoptosis / lymphocytes
Research Abstract	We investigated apoptosis induced by herpes simplex virus type 1 (HSV-1) in cord blood T lymphocytes by using agarose gel electrophoresis, DNA content analysis and the terminal deoxytransferase (TdT)- mediated dUTP nick end-labeling (TUNEL) method. DNA fragmentation and the hypodiploid fraction in the cell cycle were both increased in HSV-1-infected CD4 and CD8 lymphocytes stimulated with phytohaemagglutinin (PHA) compared to mock- infected lymphocytes. HSV-1 antigen glycoprotein D (gD) and regulatory protein ICP27 were detected in 8-18% of the hypodiploid fraction of PHA-stimulated, HSV-1-infected lymphocytes. Apoptosis was induced not only in HSV-1 antigen-expressing cells but also in cells not expressing detectable viral proteins. Addition of anti-Fas antibody, anti-Fas-ligand antibody or a mixture of both had no effect on HSV-1-induced apoptosis, indicating that the Fas-Fas-ligand pathway did not contribute to HSV-1-induced apoptosis.