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작성자 : 관리자 날짜 : 작성일15-12-03 23:09 조회 : 3,837회본문
제 501 회 생명과학연구소 종강세미나 2015.12.03 |
IL-4-induced innate CD8+ T cells control persistent viral infection
하상준 교수 (연세대학교)
Memory-like CD8+ T cells expressing eomesodermin are a subset of innate T cells initially identified in a number of genetically modified mice, and also exist in wild mice and human. The acquisition of memory phenotype and function by these T cells is dependent on IL-4 produced by PLZF+ innate T cells; however, their physiologic function is still not known. Here we found that these IL-4-induced innate CD8+ T cells are critical for accelerating the control of chronic virus infection. In CIITA-transgenic mice, which have a substantial population of IL-4-induced innate CD8+ T cells, this population facilitated rapid control of viremia and induction of functional anti-viral T-cell responses during infection with chronic form of lymphocytic choriomeningitis virus. Characteristically, anti-viral innate CD8+ T cells accumulated sufficiently during early phase of infection. They produced a robust amount of IFN- and TNF-α with enhanced expression of a degranulation marker. Furthermore, this finding was confirmed in wild-type mice. Taken together, the results from our study show that innate CD8+ T cells works as an early defense mechanism against chronic viral infection.
Education & Research Experiences
1992 – 1996 B.S., Department of Biochemistry, Yonsei University, Seoul, Korea
1996 – 1998 M.S., Department of Life Science, POSTECH, Pohang, Korea
1998 – 2001 Ph.D., Division of Molecular and Life Sciences, POSTECH, Pohang, Korea
2001 – 2004 Post-doctoral fellow, POSTECH, Pohang, Korea
2004 – 2007 Post-doctoral fellow, Emory University School of Medicine, Atlanta, US
2007 – 2009 Research Associate, Emory University School of Medicine, Atlanta, US
2009 – 2014 Assistant Professor, Yonsei University, Seoul, Korea
2014 – Present Associate Professor, Yonsei University, Seoul, Korea
Papers
Ha SJ .et al Identification of a novel subnuclear body involved in structure- and sequence-specific cytokine RNA processing.
Nature Communications 2015 Jan 5;6:5791