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논문 기본 정보

자료유형
학술저널
저자정보
Minsik Park (Kangwon National University School of Medicine) Ji Yoon Kim (Hanyang University Hospital) 김주환 (강원대학교) Jeong-Hyung Lee (Kangwon National University) Young-Guen Kwon (Yonsei University) Young-Myeong Kim (Kangwon National University School of Medicine)
저널정보
대한생화학·분자생물학회 BMB Reports BMB Reports 제54권 제9호
발행연도
2021.9
수록면
470 - 475 (6page)

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Low-dose metronomic chemotherapy has been introduced as aless toxic and effective strategy to inhibit tumor angiogenesis,but its anti-angiogenic mechanism on endothelial progenitorcells (EPCs) has not been fully elucidated. Here, we investigatedthe functional role of regulated in development and DNA damageresponse 1 (REDD1), an endogenous inhibitor of mTORC1,in low-dose doxorubicin (DOX)-mediated dysregulation of EPCfunctions. DOX treatment induced REDD1 expression in bonemarrow mononuclear cells (BMMNCs) and subsequently reducedmTORC1-dependent translation of endothelial growth factor(VEGF) receptor (Vegfr)-2 mRNA, but not that of the mRNAtranscripts for Vegfr-1, epidermal growth factor receptor, andinsulin-like growth factor-1 receptor. This selective event was arisk factor for the inhibition of BMMNC differentiation intoEPCs and their angiogenic responses to VEGF-A, but was notobserved in Redd1-deficient BMMNCs. Low-dose metronomicDOX treatment reduced the mobilization of circulating EPCsin B16 melanoma-bearing wild-type but not Redd1-deficientmice. However, REDD1 overexpression inhibited the differentiationand mobilization of EPCs in both wild-type and Redd1-deficient mice. These data suggest that REDD1 is crucial formetronomic DOX-mediated EPC dysfunction through the translationalrepression of Vegfr-2 transcript, providing REDD1 as apotential therapeutic target for the inhibition of tumor angiogenesisand tumor progression.

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