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Regulator of Calcineurin 1 Isoform 4 (RCAN1.4) Is Overexpressed in the Glomeruli of Diabetic Mice
ChorongJang, JiHeeLim, CheolWheePark, Young-JinCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.5 8 299-306 (8 pages)
ABBREVIATIONS: ECM, extracellular matrix; CaN, calcineurin; RCAN1, regulator of calcineurin 1; RCAN1.4, regulator of calcine- urin 1 isoform 4; CsA, cyclosporine A; STZ, streptozotocin; IL-1β, Interleukin-1 β; TNF-α, tumor necrosis factor-α; AGEs, advanced glycation endproducts; VEGF, vascular endothelial growth factor; TGF-β, transforming growth factor β; NFAT, nuclear factor of... (AGE-BSA) were identified as inducers of RCAN1.4 in mesangial cells. Pretreatment of cyclosporine A blocked the increases of RCAN1.4 stimulated by IL-1Ղ or AGE-BSA, suggesting that activation of CaN is required for the RCAN1.4 induction. Stable transfection of RCAN1.4 in Mes-13 mesangial cells upregulated several factors relevant to ECM production and degradation. These results suggested that RCAN1.4 might act as a link between CaN activation and ECM turnover in diabetic nephropathy. -
Knockdown of RCAN1.4 Increases Susceptibility to FAS-mediated and DNA-damage-induced Apoptosis by Upregulation of p53 Expression
YoungSunKim, HongJoonLee, ChorongJang, Ho-ShikKim, , Young-JinCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.6 12 483-489 (7 pages)
RCAN1.4 knockdown on cellular susceptibility to apoptosis and the activation of death pathway proteins. Transfection of siRNAs against RCAN1.4 resulted in enhanced Fas- and etoposide-induced apoptosis, which was associated with increased expression and translocation of Bax to mitochondria. Our results suggest that enhanced expression and activation of p53 was responsible for the upregulation... 1 (RCAN-1) gene in the modulation of cell survival under stress, little is known about its role in death-inducing signal pathways. In this study, we addressed the effects of RCAN1.4 knockdown on cellular susceptibility to apoptosis and the activation of death pathway proteins. Transfection of siRNAs against RCAN1.4 resulted in enhanced Fas- and etoposide-induced apoptosis, which was associated with increased expression and translocation of Bax to mitochondria. Our results suggest that enhanced... -
Suppression of Autophagy and Activation of Glycogen Synthase Kinase 3beta Facilitate the Aggregate Formation of Tau
Song-InKim, Won-KiLee, Sang-SooKang, Sue-YoungLee, Myeong-JaJeong, HeeJaeLee, Sung-SooKim, GallV.W.Johnson, WanjooChun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.2 6 107-114 (8 pages)
of RCAN1 and oxidative stress. Biochem J. 2006;400:511-520. 29. Alonso A, Zaidi T, Novak M, Grundke-Iqbal I, Iqbal K. Hyperphosphorylation induces self-assembly of tau into tangles of paired helical filaments/straight filaments. Proc Natl Acad Sci USA. 2001;98:6923-6928. 30. Chun W, Johnson GV. The role of tau phosphorylation and cleavage in neuronal cell death. Front Biosci. 2007;12:733-756.... Neurofibrillary tangle (NFT) is a characteristic hallmark of Alzheimer's disease. GSK3Ղ has been reported to play a major role in the NFT formation of tau. Dysfunction of autophagy might facilitate the aggregate formation of tau. The present study examined the role of GSK3Ղ-mediated phosphorylation of tau species on their autophagic degradation. We transfected wild type tau (T4), caspase-3-cleaved tau at Asp421 (T4C3), or pseudophosphorylated tau at Ser396/Ser404 (T4-2EC) in the...