핵심기술
특허 / 논문
| 4-1BB enhances CD8+ T cell expansion by regulating cell cycle progression through changes in expression of cyclins D and E and cyclin-dependent kinase inhibitor p27kip1. |
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| 등록일 :2022-11-02 13:08 조회수 :235 |
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4-1BB enhances CD8+ T cell expansion by regulating cell cycle progression through changes in expression of cyclins D and E and cyclin-dependent kinase inhibitor p27kip1.
Lee HW, Nam KO, Park SJ, Kwon BS
Abstract The T cell costimulatory receptor 4-1BB enhances cell cycle progression and proliferation of CD8(+) T cells in both an IL-2-dependent and -independent manner. In these studies, 4-1BB costimulation was shown to increase cyclin D2, D3, and E expression, and concomitantly down-regulate the expression of the cyclin-dependent kinase inhibitor p27(kip1). 4-1BB increases cyclin D2 transcription via mitogen-activated/extracellular signal-regulated kinase-1/2 and LY294002-sensitive phosphatidylinositol 3-kinase (PI3K) signaling pathways. In addition, 4-1BB up-regulates cyclin D2 translation via PI3K/Akt/mammalian target of rapamycin (mTOR) pathways, presumably triggered by IL-2/IL-2 receptor ligation. The enhanced cyclin D2 and D3 expression initiates up-regulation of cyclin E expression and down-regulation of p27(kip1). Our results suggest a role for cyclin D2, D3, and E, and p27(kip1) proteins in the 4-1BB-mediated cell cycle progression of CD8(+) T cells in vivo.
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