The UFMylation modification is a novel ubiquitin-like conjugation system,consisting of UBA5(E1),UFC1(E2),UFL1(E3),and the conjugating molecule UFM1.Deficiency in this modification leads to embryonic lethality in mice ...The UFMylation modification is a novel ubiquitin-like conjugation system,consisting of UBA5(E1),UFC1(E2),UFL1(E3),and the conjugating molecule UFM1.Deficiency in this modification leads to embryonic lethality in mice and diseases in humans.However,the function of UFL1 is poorly characterized.Studies on Ufl1 conditional knockout mice have demonstrated that the deletion of Ufl1 in cardiomyocytes and in intestinal epithelial cells causes heart failure and increases susceptibility to experimentally induced colitis,respectively,suggesting an essential role of UFL1 in the maintenance of the homeostasis in these organs.Yet,its physiological function in other tissues and organs remains completely unknown.In this study,we generate the nephron tubules specific Ufl1 knockout mice and find that the absence of Ufl1 in renal tubular results in kidney atrophy and interstitial fibrosis.In addition,Ufl1 deficiency causes the activation of unfolded protein response and cell apoptosis,which may be responsible for the kidney atrophy and interstitial fibrosis.Collectively,our results have demonstrated the crucial role of UFL1 in regulating kidney function and maintenance of endoplasmic reticulum homeostasis,providing another layer of understanding kidney atrophy.展开更多
肿瘤细胞在生长、浸润和转移过程中经历的缺氧、低糖等多种环境压力会对肿瘤细胞造成内质网应激,为应对内质网应激,肿瘤细胞会诱发未折叠蛋白反应(Unfolded protein response,UPR)。PERK通路作为激活UPR的一条关键通路可通过提高肿瘤对...肿瘤细胞在生长、浸润和转移过程中经历的缺氧、低糖等多种环境压力会对肿瘤细胞造成内质网应激,为应对内质网应激,肿瘤细胞会诱发未折叠蛋白反应(Unfolded protein response,UPR)。PERK通路作为激活UPR的一条关键通路可通过提高肿瘤对不良微环境的耐受程度、诱导新生血管生成、诱导自噬体形成、激活凋亡信号分子等促进肿瘤细胞生长、增殖、侵袭及保护性自噬,并且在UPR达到一定程度时诱导肿瘤细胞凋亡及自噬性死亡。展开更多
基金supported by grants from the National Natural Science Foundation of China(31871416,31730020)the Natural Science Foundation of ZhejiangProvince of China(LY18C070001)the Hangzhou Science and Technology Bureau(20182014B01,20180533B27)。
文摘The UFMylation modification is a novel ubiquitin-like conjugation system,consisting of UBA5(E1),UFC1(E2),UFL1(E3),and the conjugating molecule UFM1.Deficiency in this modification leads to embryonic lethality in mice and diseases in humans.However,the function of UFL1 is poorly characterized.Studies on Ufl1 conditional knockout mice have demonstrated that the deletion of Ufl1 in cardiomyocytes and in intestinal epithelial cells causes heart failure and increases susceptibility to experimentally induced colitis,respectively,suggesting an essential role of UFL1 in the maintenance of the homeostasis in these organs.Yet,its physiological function in other tissues and organs remains completely unknown.In this study,we generate the nephron tubules specific Ufl1 knockout mice and find that the absence of Ufl1 in renal tubular results in kidney atrophy and interstitial fibrosis.In addition,Ufl1 deficiency causes the activation of unfolded protein response and cell apoptosis,which may be responsible for the kidney atrophy and interstitial fibrosis.Collectively,our results have demonstrated the crucial role of UFL1 in regulating kidney function and maintenance of endoplasmic reticulum homeostasis,providing another layer of understanding kidney atrophy.
文摘肿瘤细胞在生长、浸润和转移过程中经历的缺氧、低糖等多种环境压力会对肿瘤细胞造成内质网应激,为应对内质网应激,肿瘤细胞会诱发未折叠蛋白反应(Unfolded protein response,UPR)。PERK通路作为激活UPR的一条关键通路可通过提高肿瘤对不良微环境的耐受程度、诱导新生血管生成、诱导自噬体形成、激活凋亡信号分子等促进肿瘤细胞生长、增殖、侵袭及保护性自噬,并且在UPR达到一定程度时诱导肿瘤细胞凋亡及自噬性死亡。
