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Hu Z, Zhu Q, Wang Y, Deng X, Yang H, Zhou M, Zhang J, Wang H, Wang H, Wang L, Zhang C, Li S. Lipid nephrotoxicity mediated by HIF-1α activation accelerates tubular injury in diabetic nephropathy. Ren Fail 2024; 46:2347446. [PMID: 38695335 PMCID: PMC11067561 DOI: 10.1080/0886022x.2024.2347446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 04/20/2024] [Indexed: 05/05/2024] Open
Abstract
This study is intended to explore the effect of hypoxia-inducible factor-1α (HIF-1α) activation on lipid accumulation in the diabetic kidney. A type 1 diabetic rat model was established by STZ intraperitoneal injection. Cobalt chloride (CoCl2) and YC-1 were used as the HIF-1α activator and antagonist, respectively. CoCl2 treatment significantly increased HIF-1α expression, accelerated lipid deposition, and accelerated tubular injury in diabetic kidneys. In vitro, CoCl2 effectively stabilized HIF-1α and increased its transportation from the cytoplasm to the nucleus, which was accompanied by significantly increased lipid accumulation in HK-2 cells. Furthermore, results obtained in vivo showed that HIF-1α protein expression in the renal tubules of diabetic rats was significantly downregulated by YC-1 treatment. Meanwhile, lipid accumulation in the tubules of the DM + YC-1 group was markedly decreased in comparison to the DM + DMSO group. Accordingly, PAS staining revealed that the pathological injury caused to the tubular epithelial cells was alleviated by YC-1 treatment. Furthermore, the blood glucose level, urine albumin creatinine ratio, and NAG creatinine ratio in the DM + YC-1 group were significantly decreased compared to the DM + DMSO group. Moreover, the protein expression levels of transforming growth factor β1 (TGF-β1) and connective tissue growth factor (CTGF) in diabetic kidneys were decreased by YC-1 treatment. Our findings demonstrate that the activation of HIF-1α contributed to interstitial injury in a rat model of diabetic nephropathy and that the underlying mechanism involved the induction of lipid accumulation.
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Affiliation(s)
- Zebo Hu
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Qianwen Zhu
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Ying Wang
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Xue Deng
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Hui Yang
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Mingjun Zhou
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Jiyuan Zhang
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Hao Wang
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Haosen Wang
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Lin Wang
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Cui Zhang
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
| | - Shu Li
- Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, Wuhu, China
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Peng K, Xia RP, Zhao F, Xiao Y, Ma TD, Li M, Feng Y, Zhou CG. ALKBH5 facilitates the progression of infantile hemangioma by increasing FOXF1 expression in a m 6A-YTHDF2 dependent manner to activate HK-2 signaling. Mol Cell Biochem 2024:10.1007/s11010-024-04936-y. [PMID: 38306011 DOI: 10.1007/s11010-024-04936-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/08/2024] [Indexed: 02/03/2024]
Abstract
Alkylation repair homolog protein 5 (ALKBH5) is reported to participate in infantile hemangioma (IH) progression. However, the underlying mechanism of ALKBH5 in IH remains unclear. Using qRT-PCR and Western blotting, ALKBH5, forkhead box F1 (FOXF1) and hexokinase 2 (HK-2) expressions in IH tissues and IH-derived endothelial cells XPTS-1 were assessed. The Me-RIP assay was used to analyze FOXF1 m6A level. CCK8, colony formation, flow cytometry and transwell assays were employed to determine IH cell viability, proliferation, apoptosis, migration and invasion. The interactions between YTH (YT521-B homology) domain 2 (YTHDF2), FOXF1 and HK-2 were analyzed by RIP, dual luciferase reporter gene assay and/or ChIP assay. The in vivo IH growth was evaluated in immunocompromised mice. FOXF1 was overexpressed in IH tissues, and its silencing inhibited IH cell proliferation, migration and invasion whereas promoting cell apoptosis in vitro. ALKBH5 upregulation facilitated FOXF1 mRNA stability and expression in IH cells in a m6A-YTHDF2-dependent manner. FOXF1 downregulation reversed the impact of ALKBH5 upregulation on IH cellular phenotypes. It also turned out that FOXF1 positively regulated HK-2 expression in IH cells through interacting with the HK-2 promoter. HK-2 upregulation abolished FOXF1 knockdown's inhibition on IH cell aggressive behaviors. ALKBH5 or FOXF1 silencing suppressed IH tumor development via HK-2 signaling in immunocompromised mice. ALKBH5 promoted FOXF1 expression m6A-YTHDF2 dependently, which in turn elevated HK-2 expression, thereby accelerating IH development.
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Affiliation(s)
- Kun Peng
- Department of Fetal and Neonatal Surgery, Hunan Children's Hospital, No.86, Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, People's Republic of China
| | - Ren-Peng Xia
- Department of Fetal and Neonatal Surgery, Hunan Children's Hospital, No.86, Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, People's Republic of China
| | - Fan Zhao
- Department of Fetal and Neonatal Surgery, Hunan Children's Hospital, No.86, Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, People's Republic of China
| | - Yong Xiao
- Department of Fetal and Neonatal Surgery, Hunan Children's Hospital, No.86, Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, People's Republic of China
| | - Ti-Dong Ma
- Department of Fetal and Neonatal Surgery, Hunan Children's Hospital, No.86, Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, People's Republic of China
| | - Ming Li
- Department of Fetal and Neonatal Surgery, Hunan Children's Hospital, No.86, Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, People's Republic of China
| | - Yong Feng
- Department of Fetal and Neonatal Surgery, Hunan Children's Hospital, No.86, Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, People's Republic of China
| | - Chong-Gao Zhou
- Department of Fetal and Neonatal Surgery, Hunan Children's Hospital, No.86, Ziyuan Road, Yuhua District, Changsha, 410007, Hunan, People's Republic of China.
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Chen Y, Xu F, Xiao X, Chi H, Lai Y, Lin X, Li Q, Song J, Wu W, Li Z, Yang X. Assessment of osteopontin as an early nephrotoxicity indicator in human renal proximal tubule cells and its application in evaluating lanthanum-induced nephrotoxicity. Ecotoxicol Environ Saf 2024; 271:115928. [PMID: 38215666 DOI: 10.1016/j.ecoenv.2024.115928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 12/06/2023] [Accepted: 01/01/2024] [Indexed: 01/14/2024]
Abstract
Nephrotoxicity is a common adverse effect induced by various chemicals, necessitating the development of reliable toxicity screening models for nephrotoxicity assessment. In this study, we assessed a group of nephrotoxicity indicators derived from different toxicity pathways, including conventional endpoints and kidney tubular injury biomarkers such as clusterin (CLU), kidney injury molecule-I (KIM-1), osteopontin (OPN), and neutrophil gelatinase-associated lipocalin (NGAL), using HK-2 and induced pluripotent stem cells (iPSCs)-derived renal proximal tubular epithelial-like cells (PTLs). Among the biomarkers tested, OPN emerged as the most discerning and precise marker. The predictive potential of OPN was tested using a panel of 10 nephrotoxic and 5 non-nephrotoxic compounds. The results demonstrated that combining OPN with the half-maximal inhibitory concentration (IC50) enhanced the diagnostic accuracy in both cellular models. Additionally, PTLs cells showed superior predictive efficacy for nephrotoxicity compared to HK-2 cells in this investigation. The two cellular models were utilized to evaluate the nephrotoxicity of lanthanum. The findings indicated that lanthanum possesses nephrotoxic properties; however, the degree of nephrotoxicity was relatively low, consistent with the outcomes of in vivo experiments.
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Affiliation(s)
- Yingsi Chen
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Feifei Xu
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Xiaoxuan Xiao
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Huiqin Chi
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Yuefei Lai
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Xiuqin Lin
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Qiuyun Li
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Jia Song
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Weiliang Wu
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China
| | - Ziyin Li
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China.
| | - Xingfen Yang
- Food Safety and Health Research Center, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, PR China.
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Liu S, Zhou H, Shi Y, Yi S, Wang X, Li J, Liao B, Cao J, Li G. Zinc Oxide Nanoparticles Induce Renal Injury by Initiating Oxidative Stress, Mitochondrial Damage and Apoptosis in Renal Tubular Epithelial Cells. Biol Trace Elem Res 2024; 202:481-492. [PMID: 37119342 DOI: 10.1007/s12011-023-03683-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/22/2023] [Indexed: 05/01/2023]
Abstract
Zinc oxide nanoparticles (ZnO NPs) are widely used in many fields due to their unique physicochemical properties. However, the renal toxicity of ZnO NPs and the underlying mechanisms have not been well studied. We found that ZnO NPs induced injury in human renal proximal tubular epithelial cells (HK-2) in a dose- and size-dependent manner, as revealed by CCK-8, LDH and Annexin V-FITC assays. Mechanistically, ZnO NPs promoted oxidative stress and mitochondrial damage by generating ROS and induced apoptosis in HK-2 cells, as evidenced by the upregulation of Bax and Caspase 3 and downregulation of Beclin 1. In vivo, ZnO NPs induced tubular epithelial cell apoptosis and increased serum creatinine, serum urea nitrogen, and urinary protein in mice, suggesting damage to renal structure and function. These findings clarified our understanding of the biological mechanisms underlying ZnO NP-induced renal tubular epithelial cell injury and contributed to estimating the risk of ZnO NPs to the kidney.
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Affiliation(s)
- Shuang Liu
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, and Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, China
| | - Han Zhou
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, and Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, China
| | - Yang Shi
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, and Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, China
| | - Simeng Yi
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, and Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, China
| | - Xinyu Wang
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, and Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, China
| | - Jingyan Li
- Department of Cardiovascular Surgery, Affiliated Hospital of Southwest Medical University, Southwest Medical University, Luzhou, 646000, China
| | - Bin Liao
- Department of Cardiovascular Surgery, Affiliated Hospital of Southwest Medical University, Southwest Medical University, Luzhou, 646000, China
| | - Jimin Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, 030607, China.
| | - Guang Li
- Department of Cardiology, the Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, and Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, China.
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Zhou QX, Zhou Q, Zhang P, Xie YQ, Yang ZY, Tan WH, Khan A, Duan WG, Zhou ZH, Liu L. Integrating multi-level interactive network and in vivo/vitro studies to explore the protective mechanism of Ampelopsis grossedentata in hyperuricemia. Fitoterapia 2024; 172:105718. [PMID: 37931719 DOI: 10.1016/j.fitote.2023.105718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/08/2023]
Abstract
The strategies or drugs for preventing and treating Hyperuricemia (HUA) are still lacking. As a traditional Chinese medicine (TCM) with a profound history, Ampelopsis grossedentata has been shown to play diverse biological roles. The purpose of the present study was to evaluate hypouricemic effect of A. grossedentata, and investigate its involved material basis and mechanism. A HUA mice model was established to evaluate the therapeutic effects of A. grossedentata. And then some extracts from A. grossedentata were prepared, isolated and analyzed. Furthermore, network pharmacology, based on the above results, was used to discover potential active ingredients and therapeutic targets, and they were further verified and explored by molecular docking and in vitro experiments. In vivo experiments showed that A. grossedentata exerted hypouricemic effect on mice of HUA. The core active ingredients (quercetin, myricetin and dihydromyricetin etc.) and core targets (PTGS2, XOD and ABCG2 etc.) for A. grossedentata to treat HUA were predicted by network pharmacology. And molecular docking showed that the spontaneous binding activities of above components and targets were marvelous. In vitro experiments further demonstrated that A. grossedentata exerted hypouricemic effect by decreasing the levels of UA, XOD, antioxidant factors, inflammatory factors, GLUT9 and URAT1 in HK-2 cells of HUA. Taken together, this study integrates multi-level interaction network with in vivo/vitro experiments to systematically reveal the material basis and mechanism of A. grossedentata in treating HUA, which provides a scientific basis for further study of A. grossedentata and HUA.
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Affiliation(s)
- Qi-Xiu Zhou
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Qian Zhou
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Peng Zhang
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Yan-Qing Xie
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Zhu-Ya Yang
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Wen-Hong Tan
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Afsar Khan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Wei-Gang Duan
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Zhi-Hong Zhou
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Lu Liu
- Yunnan Yunzhong Institute of Nutrition and Health, Yunnan University of Chinese Medicine, Kunming 650500, China.
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Ortiz SR, Field MS. C2C12 Muscle Myotubes, but not Kidney Proximal Tubule HK-2 Cells, Elevate Erythritol Synthesis in Response to Oxidative Stress. Curr Dev Nutr 2023; 7:102012. [PMID: 37877034 PMCID: PMC10590721 DOI: 10.1016/j.cdnut.2023.102012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 10/26/2023] Open
Abstract
Background As a biomarker, elevated serum erythritol concentrations predict type 2 diabetes and cardiovascular disease onset. Erythritol was recently shown to be a product of human glucose metabolism through the pentose phosphate pathway. The regulation of erythritol synthesis from glucose has been explored in cancer cells but not in nontransformed cells. Objective The kidneys and skeletal muscle have increased erythritol content in response to dietary sucrose, which suggests that they may significantly contribute to circulating erythritol concentrations. In the present study, we evaluated if conditions that promote erythritol synthesis in cancer cells are consistent in skeletal muscle and kidney cells. Methods C2C12 myotubules were used as a model for skeletal muscle, and human kidney (HK)-2 human proximal tubule cells were used to model kidney. C2C12 cells were exposed to high- or low-glucose conditions. Both C2C12 and HK-2 cells were exposed to the free radical generator menadione, then intracellular reactive oxygen species (ROS) and erythritol concentrations were measured. Intracellular sorbitol concentrations were also measured because increased polyol flux was also observed after exposure to excess glucose and oxidative stress. Results Intracellular erythritol concentrations were significantly elevated in C2C12 cells following both high-glucose and menadione treatment. In contrast, HK-2 cells did not increase erythritol synthesis in response to oxidative stress. Generation of ROS through hydrogen peroxide exposure elevated sorbitol concentrations in both C2C12 and HK-2 cells, whereas generation of radicals with menadione treatment did not affect sorbitol production in either cell type. Conclusions These findings highlight that the factors contributing to elevated erythritol synthesis vary between cell types. More specifically, these studies demonstrate that muscle cells increase erythritol synthesis in response to both high glucose in culture medium and oxidative stress, whereas kidney cells increase erythritol synthesis only in response to high glucose.
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Affiliation(s)
- Semira R. Ortiz
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, United States
| | - Martha S. Field
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, United States
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Liu Y, Wang S, Jin G, Gao K, Wang S, Zhang X, Zhou K, Cai Y, Zhou X, Zhao Z. Network pharmacology-based study on the mechanism of ShenKang injection in diabetic kidney disease through Keap1/Nrf2/Ho-1 signaling pathway. Phytomedicine 2023; 118:154915. [PMID: 37392674 DOI: 10.1016/j.phymed.2023.154915] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 05/16/2023] [Accepted: 06/02/2023] [Indexed: 07/03/2023]
Abstract
OBJECTIVE To study the effect of ShenKang Injection (SKI) on the kidneys of DKD rats and its effect on oxidative stress mediated by the Keap1/Nrf2/Ho-1 signaling pathway through network pharmacology and in vivo and in vitro experiments. METHODS SKI drug targets were screened by TCMSP, DKD targets were screened by GenGards, OMIM, Drugbank, TTD, and Disgenet databases, and the two intersected for PPI network analysis and target prediction was performed by GO and KEGG. A total of 40 SD rats were randomly divided into 10 in the control group and 30 in the model group. After the model group was fed 8 W with high-sugar and high-fat diets, a DKD model was constructed by one-time intraperitoneal injection of streptozotocin (35 mg/kg). According to the weight, the model animals were randomly divided into three groups: 8 for model validation group, 8 for Irbesartan (25 mg/kg daily) group, and 8 for SKI group (5 ml/kg). Gavaged deionized water was given to the control group and the model validation group equally. The general conditions of the rats were observed, their body weights measured and their urine volumes recorded for 24 h. After the intervention of 16 W, serum was collected to detect Urea, Scr, blood lipids, and oxidative stress and lipid peroxidation indicators; Transmission electron microscopy, HE and Mallory staining were used to observe the pathological morphology of renal tissue. Immunohistochemistry and RT-PCR were used to detect the expression of Keap1, Nrf2, Ho-1, Gpx4 proteins and mRNA in rat kidney tissues. HK-2 cells were cultured in vitro and divided into: the control group, AGEs (200 μg/ml) group and AGEs + SKI group. The cell activity of the groups was detected using CCK-8 after 48 h of cell culture, and ROS were detected using fluorescent probes. Gpx4 expression was detected by immunofluorescence, while Keap1, Nrf2, Ho-1, and Gpx4 were detected by Western Blot. RESULTS Network pharmacological analysis predicted that SKI may delay DKD kidney injury by affecting redox-related signaling pathways and mitigating AGEs-induced oxidative stress. In the animal experiment, compared with the model validation group, the general state of rats in the SKI group was improved, and 24-hour urine protein levels were significantly reduced, and the Scr in the serum was reduced. A decreasing trend was seen in Urea, and TC, TG, and LDL levels significantly decreased and the levels of ROS, LPO and MDA were significantly lowered. Pathological staining showed that renal interstitial fibrosis was significantly improved, and electron microscopy showed that foot process effacement was alleviated. Immunohistochemistry and RT-PCR showed decreased expression of Keap1 protein and mRNA in kidney tissues of the SKI group. Additionally, Nrf2, Ho-1, and Gpx4 proteins and mRNA were expressed significantly. In the cell experiment, after 48 h treatment with AGEs, ROS in HK-2 cells increased significantly and cell activity decreased significantly, while cell activity in AGEs + SKI group increased significantly and ROS decreased. The expression of Keap1 protein in HK-2 cells in the AGEs + SKI group decreased, while the expression of Nrf2, Ho-1 and Gpx4 proteins increased significantly. CONCLUSION SKI can protect kidney function in DKD rats, delay DKD progression, inhibit AGEs-induced oxidative stress damage in HK-2 cells, and the mechanism of SKI to improve DKD may be achieved by activating the Keap1/Nrf2/Ho-1 signal transduction pathway.
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Affiliation(s)
- Yunhua Liu
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Sitong Wang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Ge Jin
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Kun Gao
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Shuyue Wang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Xinjiang Zhang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Kaidong Zhou
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Yanmo Cai
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Xin Zhou
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Zongjiang Zhao
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 102488, China.
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Hua L, Zhang S, Yang J, Zhou X, Shi S. Sanghuangporus vaninii ethanol extract alleviates hyperuricemic renal injury by regulating the uric acid transporters and inhibiting HK-2 apoptosis. Biomed Pharmacother 2023; 164:114970. [PMID: 37279627 DOI: 10.1016/j.biopha.2023.114970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/19/2023] [Accepted: 05/29/2023] [Indexed: 06/08/2023] Open
Abstract
AIM OF THE STUDY To investigate the acute toxicity of Sanghuangporus ethanol extract (SHEE) on ICR mice and the underlying mechanism of anti-hyperuricemic renal injury. MATERIALS AND METHODS ICR mice were given a single gavage of 1250, 2500, and 5000 mg/kg SHEE, and the general behavior, mortality, body weight, dietary, and water intake were evaluated within 14 days to determine the acute toxicity level. The hyperuricemic kidney injury model in ICR mice was induced with potassium oxonate (PO) and adenine, and the mice were subsequently treated with SHEE (125, 250, 500 mg/kg). HE and hexamine silver staining (PASM) were used to observe the pathology of the kidney. Biochemical markers were tested by uric acid (UA), creatinine (Cr), blood urea nitrogen (BUN), xanthine oxidase (XOD), alanine transferase (ALT), and aspartate transaminase (AST) kits. An MTT assay was used to measure the effects of SHEE on the proliferation of HK-2 damaged by UA. Western blotting and RT-PCR were used to determine the expression of Bcl-2 family-related proteins and major UA transporters, including URAT1, GLUT9, OAT1, OAT3, and ABCG2, respectively. RESULTS Firstly, the acute toxicity study data showed that the median lethal dose (LD50) of SHEE was above 5000 mg/kg, and its oral administration was nontoxic at 2500 mg/kg and below. In addition, SHEE alleviated HUA and its renal injury in ICR mice. SHEE reduced the contents of UA, Cr, BUN and XOD in blood and the contents of ALT and AST in the liver. Furthermore, SHEE inhibited the expression of URAT1 and GLUT9 and promoted the expression of OAT1, OAT3, and ABCG2. More importantly, SHEE could downregulate the apoptosis level and caspase-3 activity. CONCLUSIONS Overall, an oral dose of SHEE below 2500 mg/kg is safe. SHEE inhibits HUA-induced kidney injury by regulating the UA transporters URAT1, GLUT9, OAT1, OAT3 and ABCG2 and inhibiting HK-2 apoptosis.
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Affiliation(s)
- Liping Hua
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Shuangshuang Zhang
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Jiali Yang
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Xiaoqi Zhou
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Senlin Shi
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China.
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Yi ZY, Peng YJ, Hui BP, Liu Z, Lin QX, Zhao D, Wang Y, Liu X, Xie J, Zhang SH, Huang JH, Yu R. Zuogui-Jiangtang-Yishen decoction prevents diabetic kidney disease: Intervene pyroptosis induced by trimethylamine n-oxide through the mROS-NLRP3 axis. Phytomedicine 2023; 114:154775. [PMID: 36990008 DOI: 10.1016/j.phymed.2023.154775] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 03/04/2023] [Accepted: 03/16/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND Nowadays, diabetic kidney disease (DKD) has become one of the most threatening to the end-stage renal diseases, and the early prevention of DKD is inevitable for Diabetes Mellitus (DM) patients. AIMS Pyroptosis, a programmed cell death that mediates renal inflammation induced early renal injury. The trimethylamine n-oxide (TMAO) was also an independent risk factor for renal injury. Here, the associations between TMAO-induced pyroptosis and pathogenesis of DKD were studied, and the potential mechanism of Zuogui-Jiangtang-Yishen (ZGJTYS) decoction to prevent DKD was further investigated. METHOD Using Goto-Kakizaki (GK) rats to establish the early DKD models. The 16S-ribosomal RNA (16S rRNA) sequencing, fecal fermentation and UPLC-MS targeted metabolism techniques were combined to explore the changes of gut-derived TMAO level under the background of DKD and the effects of ZGJTYS. The proximal convoluted tubule epithelium of human renal cortex (HK-2) cells was adopted to explore the influence of pyroptosis regulated by TMAO. RESULTS It was demonstrated that ZGJTYS could prevent the progression of DKD by regulating glucolipid metabolism disorder, improving renal function and delaying renal pathological changes. In addition, we illustrated that gut-derived TMAO could promote DKD by activating the mROS-NLRP3 axis to induce pyroptosis. Furthermore, besides interfering with the generation of TMAO through gut microbiota, ZGJTYS inhibited TMAO-induced pyroptosis with a high-glucose environment and the underlying mechanism was related to the regulation of mROS-NLRP3 axis. CONCLUSION Our results suggested that ZGJTYS inhibited the activation of pyroptosis by gut-derived TMAO via the mROS-NLRP3 axis to prevent DKD.
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Affiliation(s)
- Zi-Yang Yi
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China
| | - Ya-Jun Peng
- The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan 410007, P.R China; Hunan Key Laboratory of TCM Prescription and Syndromes Translational Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, P. R. China
| | - Bo-Ping Hui
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China
| | - Zhao Liu
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China
| | - Qing-Xia Lin
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China
| | - Di Zhao
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China
| | - Yan Wang
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Xiu Liu
- Hunan Key Laboratory of TCM Prescription and Syndromes Translational Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, P. R. China
| | - Jing Xie
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China
| | - Shui-Han Zhang
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China
| | - Jian-Hua Huang
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China; Hunan Key Laboratory of TCM Prescription and Syndromes Translational Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, P. R. China.
| | - Rong Yu
- Hunan academy of Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410013, P.R China; Hunan Key Laboratory of TCM Prescription and Syndromes Translational Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, P. R. China.
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10
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Hu X, Yang M, Li X, Gong Z, Duan J. Myo-Inositol Attenuates Renal Interstitial Fibrosis in Obstructive Nephropathy by Inhibiting PI3K/AKT Activation. J Med Food 2023. [PMID: 37192490 DOI: 10.1089/jmf.2022.k.0152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023] Open
Abstract
Emerging evidence suggests that myo-inositol (MI) has a critical role in reducing renal inflammatory processes and improving podocyte function and preventing diabetes-related renal damage. We aimed to explore the function and underlying workings of MI in renal interstitial fibrosis (RIF). Based on a mouse model, we explored the effect of MI in unilateral ureteral obstruction (UUO) and in transforming growth factor-β1 (TGF-β1)-treated HK-2 cells. Pathological changes of the kidney tissues were examined following staining of the tissues with hematoxylin, eosin, and Masson's trichrome. The mRNA quantities of fibrosis markers, fibronectin, α-smooth muscle actin (α-SMA), and collagen I, were analyzed by means of real-time polymerase chain reaction, whereas those of protein levels were assessed with Western blotting. We also determined the expression of collagen I by immunofluorescence, and the levels of phosphorylated phosphotidylinositol-3-kinase and protein kinase B (PI3K/AKT) by Western blot. In vivo, histopathological examination in the UUO mice revealed renal tubular epithelial cell necrosis, inflammatory cell infiltration, and RIF. UUO mice showed higher expression levels of collagen I, fibronectin, α-SMA, pPI3K, and pAKT compared with sham-operated mice. However, MI treatment diminished the pathological alterations of RIF in UUO mice and downregulated the expression of fibrosis markers and phosphorylated PI3K/AKT. In vitro, TGF-β1 positively influenced the propagation and differentiation of HK-2 cells and upregulated the levels of α-SMA, fibronectin, collagen I, pPI3K, and pAKT, but these became significantly reversed by MI treatment. In conclusion, MI ameliorates RIF, possibly by negatively regulating TGF-β1-induced epithelial transdifferentiation and PI3K/AKT activation.
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Affiliation(s)
- Xiaofang Hu
- Department of Clinical Medicine, School of Medicine, Hunan Normal University, Changsha, China
| | - Ming Yang
- Department of Nephrology, Zhuzhou Central Hospital, Zhuzhou, China
| | - Xiangyi Li
- Department of Nephrology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Hunan, China
| | - Zhicheng Gong
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China
| | - Jianxiu Duan
- Department of Clinical Trial Research Center, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Hunan, China
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11
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Zhu Y, Yan W, Xu S, Yu X, Sun S, Zhang S, Zhao R, Tao J, Li Y, Li C. Identification of an unrecognized circRNA associated with development of renal fibrosis. Front Genet 2023; 13:964840. [PMID: 36685959 PMCID: PMC9845265 DOI: 10.3389/fgene.2022.964840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 12/01/2022] [Indexed: 01/05/2023] Open
Abstract
Backgroud: Renal fibrosis is the common characteristic of chronic kidney disease. Circular RNA plays an essential role in the occurrence and development of Renal fibrosis, but its regulative mechanism remains elusive. Methods: The animal and cell model of Renal fibrosis was established, and RNA-sequencing and real-time polymerase chain reaction (qRT-PCR) experiments were implemented. Subsequently, experiments for detecting apoptosis and proliferation of cell, were carried out, and the isobaric tags for relative and absolute quantification proteomics analyses were performed accordingly. Results: It was found that a newly discovered Circular RNA (circRNA_0002158), is highly expressed in kidneys or cells with fibrosis, implying that this Circular RNA might be associated with the occurrence and development of Renal fibrosis. Subsequently, the overexpression and knockdown of circRNA_0002158 were conducted in the human kidney epithelial cell line (HK-2) cells, and the results indicated that the circRNA_0002158 could inhibit apoptosis, and promote proliferation of cells. The kidney injury-related factors, including Fibronectin and plasminogen activator inhibitor-1 (PAI-1), were decreased in HK-2 cells with overexpression of circRNA_0002158, while the results were reversed in cells with knockdown of circRNA_0002158. Finally, to explore the regulative mechanism of circRNA_0002158, the iTRAQ proteomics analyses were implemented for the cell samples with OE of circRNA_0002158 and its control, it showed that multiple genes and functional pathways were associated with the occurrence and development of Renal fibrosis. Conclusion: CircRNA_0002158 is associated with regulating Renal fibrosis, and may contribute to ameliorating the progression of Renal fibrosis in the future.
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Affiliation(s)
- Yun Zhu
- Department of Dermatology, The People’s Hospital of Yuxi City, Yuxi, China
| | - Weimin Yan
- Department of Dermatology, The People’s Hospital of Yuxi City, Yuxi, China
| | - Shuangyan Xu
- Department of Dermatology, The People’s Hospital of Yuxi City, Yuxi, China
| | - Xiaochao Yu
- Graduate School, Kunming Medical University, Kunming, China
| | - Shuo Sun
- Graduate School, Kunming Medical University, Kunming, China
| | | | - Ran Zhao
- Graduate School, Kunming Medical University, Kunming, China
| | - Jiayue Tao
- Graduate School, Kunming Medical University, Kunming, China
| | - Yunwei Li
- Department of Urology, The Third Hospital of Shandong Province, Jinan, China,*Correspondence: Yunwei Li, ; Cuie Li,
| | - Cuie Li
- Department of Geriatrics, The People’s Hospital of Yuxi City, Yuxi, China,*Correspondence: Yunwei Li, ; Cuie Li,
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12
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Sun Y, Qu H, Song Q, Shen Y, Wang L, Niu X. High-glucose induced toxicity in HK-2 cells can be alleviated by inhibition of miRNA-320c. Ren Fail 2022; 44:1388-1398. [PMID: 35969018 PMCID: PMC9389931 DOI: 10.1080/0886022x.2022.2106874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Diabetic nephropathy (DN) is a major healthcare challenge worldwide. MiRNAs exert a regulatory effect on the progress of DN. Our study proposed to investigate the miR-320c expression and its function on the pathogenesis of DN in vitro. The level of miR-320c in HK-2 cells was quantified by RT-qPCR. Cell morphology, invasion, and migration were observed by optical microscope, Transwell invasion assay, and scratch wound assay. Then, the levels of PTEN, α-SMA, vimentin, E-cadherin, p-PI3K, PI3K, AKT, and p-AKT were analyzed through western blotting. A Dual-luciferase reporter assay was conducted to explore the target relationship between miR-320c and PTEN. It was discovered that miR-320c was over-expressed in high glucose (HG)-treated HK-2 cells. Furthermore, inhibition of miR-320c could alleviate the epithelial-mesenchymal transition (EMT) of HG-induced HK-2 cells and retain the normal morphology of HK-2 cells. Additionally, the miR-320c inhibitor decreased the invasiveness and migration of HG-treated HK-2 cells. Next, the target gene of miR-320c, PTEN, was identified, and the function of miR-320c was reversed by down-regulation of PTEN. Finally, we found inhibition of miR-320c restrained the PI3K/AKT pathway. Therefore, inhibition of miR-320c could alleviate toxicity of HK-2 cells induced by HG via targeting PTEN and restraining the PI3K/AKT pathway, illustrating that miR-320c may act as a new biomarker in the diagnosis of DN.
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Affiliation(s)
- Yan Sun
- Heji Hospital Affiliated to Changzhi Medical College, Changzhi, China
| | - Hai Qu
- Department of General Surgery, Heji Hospital Affiliated to Changzhi Medical College, Changzhi, China
| | - Qi Song
- Heji Hospital Affiliated to Changzhi Medical College, Changzhi, China
| | - Yifan Shen
- Heji Hospital Affiliated to Changzhi Medical College, Changzhi, China
| | - Lijuan Wang
- Heji Hospital Affiliated to Changzhi Medical College, Changzhi, China
| | - Xiaohong Niu
- Heji Hospital Affiliated to Changzhi Medical College, Changzhi, China
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13
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Zhou J, Peng X, Ru Y, Xu J. Circ_0060077 Knockdown Alleviates High-Glucose-Induced Cell Apoptosis, Oxidative Stress, Inflammation and Fibrosis in HK-2 Cells via miR-145-5p/VASN Pathway. Inflammation 2022; 45:1911-1923. [PMID: 35729462 DOI: 10.1007/s10753-022-01649-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 01/17/2022] [Accepted: 02/09/2022] [Indexed: 12/22/2022]
Abstract
The involvement of circular RNAs (circRNAs) in the progression of diabetic nephropathy (DN) has been reported. However, the functions of circ_0060077 in DN remain unclear. HK-2 cells were treated with high glucose (HG) to establish DN cell model. Quantitative real-time polymerase chain reaction (qRT-PCR) was proceeded to determine the levels of circ_0060077, microRNA-145-5p (miR-145-5p) and vasorin (VASN). Cell counting kit-8 (CCK-8) assay, 5-ethynyl-2'-deoxyuridine (EdU) assay and colony formation assay were conducted to assess cell proliferation ability. Flow cytometry analysis was employed for cell apoptosis. The oxidative stress level was evaluated by commercial kits. Enzyme-linked immunosorbent assay (ELISA) was adopted to examine the concentrations of inflammatory factors. Western blot assay was utilized for protein levels. Dual-luciferase reporter assay and RNA pull-down assay were manipulated to analyze the relationships among circ_0060077, miR-145-5p and VASN. Circ_0060077 level was increased in DN patients and HG-stimulated HK-2 cells. Circ_0060077 knockdown ameliorated the inhibitory effect of HG on HK-2 cell proliferation and the promotional effects on cell apoptosis, oxidative stress, inflammation and fibrosis. MiR-145-5p was identified as the target for circ_0060077 and miR-145-5p inhibition ameliorated the effect of circ_0060077 silencing on HG-induced HK-2 cell injury. Moreover, miR-145-5p directly bound to VASN. Overexpression of miR-145-5p facilitated cell proliferation and repressed apoptosis, oxidative injury, inflammation and fibrosis in HG-induced HK-2 cells by targeting VASN. Circ_0060077 silencing protected HK-2 cells from HG-induced damage by regulating miR-145-5p/VASN axis.
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Affiliation(s)
- Jinjin Zhou
- Department of Nephrology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang City, Henan Province, China
| | - Xia Peng
- Department of Nephrology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang City, Henan Province, China
| | - Yanhai Ru
- Department of Nephrology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang City, Henan Province, China
| | - Jiayun Xu
- Department of Nephrology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang City, Henan Province, China.
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14
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Xing J, Fan S, Liu H, Zhang S, Li N. CircZNF644 aggravates lipopolysaccharide-induced HK-2 cell impairment via the miR-140-5p/MLKL axis. J Bioenerg Biomembr 2022; 54:215-226. [PMID: 35976517 DOI: 10.1007/s10863-022-09946-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 08/12/2022] [Indexed: 10/15/2022]
Abstract
Circular RNAs (circRNAs) play vital roles in human diseases, including acute kidney injury (AKI). In this paper, we focused on the effect of circRNA zinc finger protein 644 (circZNF644) on AKI cell model progression. qRT-PCR was conducted for the levels of circZNF644, ZNF644, miR-140-5p and mixed lineage kinase domain like pseudokinase (MLKL). RNase R assay, actinomycin D assay and subcellular fraction analysis were conducted to analyze the features of circZNF644. CCK-8 assay and EdU assay were used to explore cell proliferation. Flow cytometry analysis was conducted to analyze cell cycle and cell apoptosis. Western blot assay was executed for protein levels. ELISA was performed for the levels of inflammatory cytokines. The relationships among circZNF644, miR-140-5p and MLKL were analyzed by dual-luciferase reporter assay and RIP assay. CircZNF644 was upregulated in LPS-stimulated HK-2 cells. LPS-mediated inhibitory effects on cell proliferation and cell cycle and promotional effects on apoptosis and inflammation were reversed by circZNF644 knockdown. CircZNF644 directly interacted with miR-140-5p and MLKL was the target gene of miR-140-5p. The impact of circZNF644 knockdown on HK-2 cell injury was relieved by miR-140-5p inhibition. Moreover, miR-140-5p enhancement alleviated LPS-triggered HK-2 cell damage, while MLKL elevation reversed the effect. CircZNF644 knockdown protected HK-2 cells from LPS-induced injury by altering miR-140-5p/MLKL pathway, suggesting that circZNF644 may be a hopeful therapeutic target for AKI.
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Affiliation(s)
- Jing Xing
- Department of Emergency, the First Affiliated Hospital of Dalian Medical University, No. 222, Zhongshan Road, Xigang District, Dalian City, 116011, Liaoning Province, China
| | - Songtao Fan
- Department of Ophthalmology, the First Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Hongyang Liu
- Department of Cardiac ICU, the First Affiliated Hospital of Dalian Medical University, Dalian, 116011, Liaoning Province, China
| | - Su Zhang
- Department of Emergency, the First Affiliated Hospital of Dalian Medical University, No. 222, Zhongshan Road, Xigang District, Dalian City, 116011, Liaoning Province, China
| | - Nan Li
- Department of Emergency, the First Affiliated Hospital of Dalian Medical University, No. 222, Zhongshan Road, Xigang District, Dalian City, 116011, Liaoning Province, China.
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15
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Li Y, Deng X, Zhuang W, Li Y, Xue H, Lv X, Zhu S. Tanshinone IIA down-regulates -transforming growth factor beta 1 to relieve renal tubular epithelial cell inflammation and pyroptosis caused by high glucose. Bioengineered 2022; 13:12224-12236. [PMID: 35577353 PMCID: PMC9275952 DOI: 10.1080/21655979.2022.2074619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Diabetic nephropathy (DN) is a microvascular disease caused by diabetes. Tanshinone IIA has been indicated to ameliorate streptozotocin-induced DN. This study explores the effect of tanshinone IIA on high glucose-induced renal tubular epithelial cell pyroptosis and inflammation. High glucose-stimulated HK-2 cells were used as the in-vitro model of DN and were treated with tanshinone IIA at concentrations of 1, 5, 10 μM for 24 h with the same doses of tolbutamide as the control. After tanshinone IIA treatment, HK-2 cells were transfected with pcDNA-transforming growth factor beta 1 (TGFB1) or sh-TGFB1 for 48 h. RT-qPCR was used to detect the mRNA levels of TNF-α, IL-6, IL-1β, and IL-18. Cell apoptosis and pyroptosis were detected by flow cytometry and cell immunofluorescence. Bioinformatics screening predicted that tanshinone IIA might be an effective component of Salvia miltiorrhiza Bunge (Labiatae) for the treatment of DN. Tanshinone IIA exerted a protective effect in the in-vitro model of DN by suppressing inflammation and pyroptosis via the TGFB1-dependent pathway. Tanshinone IIA inhibited high glucose-induced renal tubular epithelial cell inflammation and cell death through pyroptosis by regulating TGFB1, indicating the therapeutic potential of tanshinone IIA for DN treatment.
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Affiliation(s)
- Ying Li
- Department of Endocrinology, The Affiliated Suqian First People's Hospital of Nanjing Medical University, Suqian, China
| | - Xu Deng
- Department of Endocrinology, The Affiliated Suqian First People's Hospital of Nanjing Medical University, Suqian, China
| | - Wenlong Zhuang
- Department of General Surgery, The Affiliated Suqian First People's Hospital of Nanjing Medical University, Suqian, China
| | - Yong Li
- Department of General Surgery, The Affiliated Suqian First People's Hospital of Nanjing Medical University, Suqian, China
| | - Hui Xue
- Department of Endocrinology, The Affiliated Suqian First People's Hospital of Nanjing Medical University, Suqian, China
| | - Xin Lv
- Department of Endocrinology, The Affiliated Suqian First People's Hospital of Nanjing Medical University, Suqian, China
| | - Shuqin Zhu
- Department of Endocrinology, The Affiliated Suqian First People's Hospital of Nanjing Medical University, Suqian, China
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16
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Wang Y, Chi H, Xu F, He Z, Li Z, Wu F, Li Y, Zhang G, Peng X, Yu S, Yang J, Zhang W, Yang X. Cadmium chloride-induced apoptosis of HK-2 cells via interfering with mitochondrial respiratory chain. Ecotoxicol Environ Saf 2022; 236:113494. [PMID: 35413622 DOI: 10.1016/j.ecoenv.2022.113494] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 04/02/2022] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Abstract
Cadmium could induce cell apoptosis, probably related to the dysfunction of the mitochondrial respiratory chain. The human renal proximal tubule (HK-2) was used to explore the mechanism of mitochondrial respiratory chain dysfunction during apoptosis induced by cadmium chloride (CdCl2). Cell viability was evaluated by cell proliferation assay and different concentrations of 60, 80 and 100 μM were selected to evaluate the mitochondrial toxicity of CdCl2 respectively. Under the CdCl2 treatment for 24 h, the mitochondrial reactive oxygen species (ROS) of HK-2 cells increased and the superoxide dismutase (SOD) activity was inhibited at the above three concentrations separately. Both ATP content and mitochondrial membrane potential decreased significantly at 100 μM concentration. The levels of procaspase-3 and Bcl-2 had fallen in a concentration-dependent manner and Bax was significantly increased at 60, 80 and 100 μM concentration compared with no CdCl2 treatment respectively, which activated the mitochondrial apoptosis pathway. N-acetyl-cysteine (NAC) could partially resist CdCl2-induced cell apoptosis, while myxothiazol (Myx) promoted the process. Mitochondria relative alterations manifested as inhibition of complex III and V. In addition, both the quantity of mitochondrial coenzyme Q-binding protein CoQ10 homolog B (CoQ10B) and cytochrome c (Cyt c) had decreased significantly. Taken together, CdCl2 induced HK-2 apoptosis due to the mitochondrial respiratory chain dysfunction by reducing the CoQ10B level, offering a novel evaluating indicator for the environmental toxicity of CdCl2.
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Affiliation(s)
- Yan Wang
- Department of public health and preventive medicine, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, PR China
| | - Huiqin Chi
- Food Safety and Health Research Center, Guangdong Provincial Key Laboratory of Tropical Disease Research, Guangdong, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, PR China
| | - Feifei Xu
- Food Safety and Health Research Center, Guangdong Provincial Key Laboratory of Tropical Disease Research, Guangdong, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, PR China
| | - Zhini He
- Food Safety and Health Research Center, Guangdong Provincial Key Laboratory of Tropical Disease Research, Guangdong, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, PR China
| | - Ziyin Li
- Food Safety and Health Research Center, Guangdong Provincial Key Laboratory of Tropical Disease Research, Guangdong, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, PR China
| | - Fan Wu
- Department of public health and preventive medicine, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, PR China
| | - Yueqi Li
- Department of public health and preventive medicine, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, PR China
| | - Gaoqiang Zhang
- Department of public health and preventive medicine, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, PR China
| | - Xinyue Peng
- Department of public health and preventive medicine, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, PR China
| | - Susu Yu
- Department of public health and preventive medicine, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, PR China
| | - Jiani Yang
- Department of public health and preventive medicine, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, PR China
| | - Wenjuan Zhang
- Department of public health and preventive medicine, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, PR China.
| | - Xingfen Yang
- Food Safety and Health Research Center, Guangdong Provincial Key Laboratory of Tropical Disease Research, Guangdong, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, PR China.
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Gong Y, Dong X, Xu J, Yang W. LncRNA NEAT1 knockdown ameliorates LPS-induced human kidney injury by mediating the miR-330-5p/FOXO3 axis. Int Urol Nephrol 2022; 54:2683-2694. [PMID: 35364751 DOI: 10.1007/s11255-022-03179-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 03/15/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Sepsis is a systemic process with multiple inflammatory responses and organ injuries, particularly in the damage of the kidney. Recently, numerous studies suggest that long non-coding RNAs (lncRNAs) are involved in sepsis-related kidney injury. This study aimed to investigate the functional role and mechanism of lncRNA nuclear paraspeckle assembly transcript 1 (NEAT1) in sepsis-related kidney injury. METHODS Cell model of kidney injury was constructed in human kidney 2 (HK-2) cells with the treatment of lipopolysaccharide (LPS). The expression of NEAT1 was measured by quantitative real-time PCR (qRT-PCR). Cell viability was examined using CCK-8 assay. Flow cytometry was performed to detect cell apoptosis, and apoptosis-related proteins were quantified by western blot. The release of proinflammatory cytokines was assessed by ELISA. Oxidative stress was assessed by the levels of SOD and MDA using kits. The putative relationship between miR-330-5p and NEAT1 or FOXO3 was confirmed using dual-luciferase reporter assay, RIP assay and pull-down assay. RESULT The expression of NEAT1 was increased in LPS-treated HK-2 cells. LPS exposure promoted apoptotic rate, inflammatory responses and oxidative stress in HK-2 cells, which were largely ameliorated by NEAT1 knockdown. MiR-330-5p was verified as a target of NEAT1, and miR-330-5p inhibition reversed the effects of NEAT1 knockdown in LPS-treated HK-2 cells. Moreover, FOXO3 was a target of miR-330-5p, and miR-330-5p restoration-blocked cell apoptosis, inflammation and oxidative stress in LPS-treated HK-2 cells were recovered by FOXO3 overexpression. CONCLUSION NEAT1 downregulation meliorated LPS-induced HK-2 cell injuries partly by regulating the miR-330-5p/FOXO3 pathway.
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Affiliation(s)
- Yi Gong
- Department of Cardiology and Macrovascular Surgery, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang, 330006, Jiangxi, China.
| | - Xiao Dong
- Department of Cardiology and Macrovascular Surgery, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang, 330006, Jiangxi, China
| | - Jianjun Xu
- Department of Cardiology and Macrovascular Surgery, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang, 330006, Jiangxi, China
| | - Wei Yang
- Department of Cardiology and Macrovascular Surgery, The Second Affiliated Hospital of Nanchang University, No. 1, Minde Road, Nanchang, 330006, Jiangxi, China
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Ma Y, Zhou Q, Zhao P, Lv X, Gong C, Gao J, Liu J. Effect of transferrin glycation induced by high glucose on HK-2 cells in vitro. Front Endocrinol (Lausanne) 2022; 13:1009507. [PMID: 36778593 PMCID: PMC9909336 DOI: 10.3389/fendo.2022.1009507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 12/19/2022] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND AND OBJECTIVE Glycation is a common post-transcriptional modification of proteins. Previous studies have shown that advanced glycation end modified transferrin (AGE-Tf) levels in diabetic rat kidney tissues were increased; however, its role in diabetic nephropathy remains unclear. In this study, differences in glycation degree and Tf sites induced by differing high glucose concentrations in vitro and the effect on total iron binding capacity (TIBC) were observed. Moreover, the effect of AGE-Tf on human renal tubular epithelial cells (HK-2) was investigated. METHODS In vitro Tf was incubated with increasing glucose concentrations (0 mM, 5.6 mM, 11.1 mM, 33.3 mM, 100 mM, 500 mM, and 1,000 mM) for AGE-Tf. Differences in AGE-Tf glycation degree and TIBC level were analyzed via colorimetric method. The AGE-Tf glycation sites were identified with LC-MS/MS. HK-2 cells were treated with AGE-Tf prepared with different glucose concentrations (33.3 mM and 500 mM) in vitro. The effects of AGE-Tf on HK-2 cell viability, proliferation, oxidative stress index, and Tf receptor expression levels were then observed. RESULTS With increasing glucose concentrations (100 mM, 500 mM, and 1,000 mM) in vitro, Tf glycation degree was significantly increased. The TIBC levels of AGE-Tf were decreased significantly with increasing glucose concentrations (33.3 mM, 100 mM, 500 mM, and 1,000 mM). Four glycated modification sites in Tf and 17 glycated modification sites were detected in AGE-Tf (500 mM) by LC-MS/MS. The structural types of AGEs were CML, G-H1, FL-1H2O, FL, and MG-H1. No significant differences were found in the survival rate of HK-2 cells among the AGE-Tf (500 mM), AGE-Tf (33.3 mM), and Tf groups (all p > 0.05). The apoptosis rate of HK-2 cells in the AGE-Tf (500 mM) group was significantly higher than that in the AGE-Tf (33.3 mM) group. Additionally, both of them were significantly higher than that in the Tf group (both p < 0.05). The MDA levels of HK-2 cells in the AGE-Tf (500 mM) and AGE-Tf (33.3 mM) groups were higher than that in the Tf group, but not significantly (both p > 0.05). The T-AOC level of HK-2 in the AGE-Tf (500 mM) group was significantly lower than that in the AGE-Tf (33.3 mM) and Tf groups (both p < 0.001). The GSH level of HK-2 cells in the AGE-Tf (500 mM) group was significantly lower than that in the Tf group (p < 0.05). The expression level of TfR in the AGE-Tf (500 mM) group was also significantly lower than that in the Tf group (p < 0.05). CONCLUSION The degree and sites of Tf glycation were increased in vitro secondary to high-glucose exposure; however, the binding ability of Tf to iron decreased gradually. After HK-2 was stimulated by AGE-Tf in vitro, the apoptosis of cells was increased, antioxidant capacity was decreased, and TfR expression levels were downregulated.
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Affiliation(s)
- Yanqi Ma
- The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China
| | - Qikai Zhou
- Tianjin Normal University, Tianjin, China
| | - Pingping Zhao
- The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China
| | - Xiaoyu Lv
- The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China
| | - Caixia Gong
- The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China
| | - Jie Gao
- The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China
| | - Jingfang Liu
- The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China
- Department of Endocrinology, The First Hospital of Lanzhou University, Lanzhou, Gansu, China
- *Correspondence: Jingfang Liu,
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García-Pérez E, Ryu D, Kim HY, Kim HD, Lee HJ. Human Proximal Tubule Epithelial Cells ( HK-2) as a Sensitive In Vitro System for Ochratoxin A Induced Oxidative Stress. Toxins (Basel) 2021; 13:787. [PMID: 34822571 DOI: 10.3390/toxins13110787] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/28/2021] [Accepted: 11/04/2021] [Indexed: 01/09/2023] Open
Abstract
Ochratoxin A (OTA) is a mycotoxin that is potentially carcinogenic to humans. Although its mechanism remains unclear, oxidative stress has been recognized as a plausible cause for the potent renal carcinogenicity observed in experimental animals. The effect of OTA on oxidative stress parameters in two cell lines of LLC-PK1 and HK-2 derived from the kidneys of pig and human, respectively, were investigated and compared. We found that the cytotoxicity of OTA on LLC-PK1 and HK-2 cells was dose- and time-dependent in both cell lines. Furthermore, increased intracellular reactive oxygen species (ROS) induced by OTA in both cell lines were observed in a time-dependent manner. Glutathione (GSH) was depleted by OTA at >48 h in HK-2 but not in LLC-PK1 cells. While the mRNA levels of glucose-6-phosphate dehydrogenase (G6PD) and glutathione peroxidase 1 (GPX1) in LLC-PK1 were down-regulated by 0.67- and 0.66-fold, respectively, those of catalase (CAT), glutathione reductase (GSR), and superoxide dismutase 1 (SOD) in HK-2 were up-regulated by 2.20-, 2.24-, and 2.75-fold, respectively, after 72 h exposure to OTA. Based on these results, we conclude that HK-2 cells are more sensitive to OTA-mediated toxicity than LLC-PK1, and OTA can cause a significant oxidative stress in HK-2 as indicated by changes in the parameter evaluated.
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20
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Zhu Z, Ruan S, Jiang Y, Huang F, Xia W, Chen J, Cui Y, He C, Zeng F, Li Y, Chen Z, Chen H. α-Klotho released from HK-2 cells inhibits osteogenic differentiation of renal interstitial fibroblasts by inactivating the Wnt-β-catenin pathway. Cell Mol Life Sci 2021; 78:7831-7849. [PMID: 34724098 DOI: 10.1007/s00018-021-03972-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 08/18/2021] [Accepted: 09/06/2021] [Indexed: 01/01/2023]
Abstract
Randall's plaques (RP) are well established as precursor lesions of idiopathic calcium oxalate (CaOx) stones, and the process of biomineralization driven by osteogenic-like cells has been highlighted in RP formation, but the mechanism is poorly understood. Given the inhibitory role of α-Klotho (KL), an aging suppressor protein with high expression in kidneys, in ectopic calcification and the close association between KL gene polymorphisms and urolithiasis susceptibility, we determined the potential role of KL in RP formation. This study found that both soluble KL (s-KL) and transmembrane KL (m-KL) were downregulated, and that s-KL but not m-KL was inversely correlated with upregulation of osteogenic markers in RP tissues. Additionally, s-KL expression was markedly suppressed in human renal interstitial fibroblasts (hRIFs) and slightly suppressed in HK-2 cells after osteogenic induction, intriguingly, which was echoed to the greater osteogenic capability of hRIFs than HK-2 cells. Further investigations showed the inhibitory effect of s-KL on hRIF osteogenic differentiation in vitro and in vivo. Moreover, coculture with recombinant human KL (r-KL) or HK-2 cells suppressed osteogenic differentiation of hRIFs, and this effect was abolished by coculture with KL-silenced HK-2 cells or the β-catenin agonist SKL2001. Mechanistically, s-KL inactivated the Wnt-β-catenin pathway by directly binding to Wnt2 and upregulating SFRP1. Further investigations identified activation of the Wnt-β-catenin pathway and downregulation of SFRP1 and DKK1 in RP tissues. In summary, this study identified s-KL deficiency as a pathological feature of RP and revealed that s-KL released from HK-2 cells inhibited osteogenic differentiation of hRIFs by inactivating the Wnt-β-catenin pathway, not only providing in-depth insight into the role of s-KL in renal interstitial biomineralization but also shedding new light on the interaction of renal tubular epithelial cells with interstitial cells to clarify RP formation.
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Affiliation(s)
- Zewu Zhu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Shuhao Ruan
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Yingcheng Jiang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Fang Huang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Weiping Xia
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Jinbo Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Yu Cui
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Cheng He
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Feng Zeng
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Yang Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Zhiyong Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
| | - Hequn Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
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21
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Ye QL, Wang DM, Wang X, Zhang ZQ, Tian QX, Feng SY, Zhang ZH, Yu DX, Ding DM, Xie DD. Sirt1 inhibits kidney stones formation by attenuating calcium oxalate-induced cell injury. Chem Biol Interact 2021; 347:109605. [PMID: 34333021 DOI: 10.1016/j.cbi.2021.109605] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 07/03/2021] [Accepted: 07/28/2021] [Indexed: 11/24/2022]
Abstract
Cell injury is a necessary and critical event during CaOx kidney stone formation. Sirt1 exerts a number of pleiotropic effects, protecting against renal cell injury. This study aims to explore the relationship between Sirt1 and CaOx kidney stone formation and the underlying mechanism. Sirt1 expression in renal tissues or HK-2 cells was detected by Western blot, immunohistochemistry and immunofluorescence. Apoptosis in renal tissues was examined by TUNEL staining. Renal pathological changes and the crystals deposition were detected by hematoxylin-eosin and Von Kossa staining. Crystal-cell adhesion and cell injury in HK-2 cells were assessed by atomic absorption spectrometry and flow cytometry, respectively. Sirt1 expression in nephrolithiasis patients was downregulated and the level of apoptosis was increased. Further study found that Sirt1 expression was decreased in both in vivo and in vitro models. Interestingly, the levels of cell injury were elevated in vivo and in vitro models. Suppressing Sirt1 expression promoted COM-induced crystal-cell adhesion and exacerbated cell injury. In contrast, increasing the expression of Sirt1 by lentivirus transfection in vitro and resveratrol administration in vivo, alleviated crystal deposition and cell damage. Our findings suggest that Sirt1 could inhibit kidney stone formation, at least in part, through attenuating CaOx -induced cell injury.
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Affiliation(s)
- Qing-Lin Ye
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
| | - Da-Ming Wang
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
| | - Xin Wang
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
| | - Zhi-Qiang Zhang
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
| | - Qi-Xing Tian
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
| | - Shi-Yao Feng
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
| | - Zhi-Hui Zhang
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
| | - De-Xin Yu
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China
| | - De-Mao Ding
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China.
| | - Dong-Dong Xie
- Department of Urology, Second Affiliated Hospital, Anhui Medical University, Hefei, 230032, China.
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22
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Song Y, Liu W, Zhao Y, Zang J, Gao H. Ochratoxin A induces human kidney tubular epithelial cell apoptosis through regulating lipid raft/PTEN/AKT signaling pathway. Environ Toxicol 2021; 36:1880-1885. [PMID: 34101318 DOI: 10.1002/tox.23308] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/26/2021] [Accepted: 05/30/2021] [Indexed: 06/12/2023]
Abstract
Ochratoxin A (OTA) is a fungal toxin that causes serious threat to human health. OTA could lead to the injury of various tissues, especially kidney injury. However, the toxic effects of OTA on human kidney tubular epithelial cell (HK-2) and the possible mechanism remains poorly understood. This study was to investigate the toxic effects of OTA on HK-2 and elucidate the molecular mechanism. HK-2 cells were treated OTA to evaluate the effect of OTA on cell viability and apoptosis. OTA inhibited the growth of HK-2 in a concentration-dependent manner. With the concentration increased, OTA significantly lead to the apoptosis of HK-2. OTA could increase the levels of reactive oxygen species (ROS) and Malondialdehyde (MDA). Superoxide dismutase (SOD) and glutathione (GSH) activities were decreased by OTA. Furthermore, OTA increased Caspase-3 and Bax expression and decreased BCL2 expression. Compared to the control group, the expression of PTEN was increased and the expression of PI3K and AKT were decreased in OTA treated groups. In addition, we found OTA could disrupt the formation of lipid raft by attenuating sphingomyelin and cholesterol levels. In conclusion, our results indicated that OTA induces apoptosis in HK-2 through regulating PTEN/AKT signaling pathway via disrupting lipid raft formation.
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Affiliation(s)
- Yanyan Song
- Department of Nephrology, The Second Hospital of Jilin University, Changchun, China
| | - Wei Liu
- Department of Spinal Surgery, The First Hospital of Jilin University, Changchun, China
| | - Yao Zhao
- Department of Nephrology, The Second Hospital of Jilin University, Changchun, China
| | - Junting Zang
- Department of Bone and Joint Surgery, The First Hospital of Jilin University, Changchun, China
| | - Hang Gao
- Department of Bone and Joint Surgery, The First Hospital of Jilin University, Changchun, China
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23
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Wu F, Zhao Y, Shao Q, Fang K, Dong R, Jiang S, Lu F, Luo J, Chen G. Ameliorative Effects of Osthole on Experimental Renal Fibrosis in vivo and in vitro by Inhibiting IL-11/ERK1/2 Signaling. Front Pharmacol 2021; 12:646331. [PMID: 34054526 PMCID: PMC8155534 DOI: 10.3389/fphar.2021.646331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 04/28/2021] [Indexed: 12/28/2022] Open
Abstract
Objectives: Natural product, osthole, has been proven to have a protective effect on organ fibrosis, including renal fibrosis. All of these studies are mainly focused on the regulation of TGF-β/Smad signaling pathway. However, due to the pleiotropic roles of TGF-β/Smad signaling, direct TGF-β-targeted treatments are unlikely to be therapeutically feasible in clinic. Recently, the downstream IL-11/ERK1/2 signaling of TGF-β has become an attractive therapeutic target without upstream disadvantages. Based on that, this study was designed to identify the potential effects of osthole on IL-11/ERK1/2 signaling pathway in renal fibrosis. Methods: The renal fibrosis model was established in vivo and in vitro, we investigated the effects of osthole on unilateral ureteral obstruction (UUO)-induced renal fibrosis and TGF-β-induced HK-2 cells. After preliminarily confirming the antifibrogenic effects of osthole and the link between its antifibrogenic effects and the inhibition of IL-11/ERK1/2 signaling, we applied a direct IL-11-induced HK-2 cells fibrosis model to further explore the inhibitory effects of osthole on IL-11/ERK1/2 signaling pathway. Results: Our results confirmed that osthole can decrease the secretion of fibrosis proteins, such as α-smooth muscle actin (α-SMA), collagen I, and fibronectin, ameliorate experimental renal fibrosis in vivo and in vitro, and the effect was associated with suppressing TGF-β1/Smad signaling. More importantly, we found that IL-11/ERK1/2 signaling in UUO-induced renal fibrosis and TGF-β-induced HK-2 cell model was obviously upregulated, and osthole treatment also significantly inhibited the abnormal IL-11/ERK1/2 signaling activation. Given the direct link between TGF-β/Smad signaling and IL-11/ERK1/2 signaling pathway, we have verified that osthole has a direct inhibitory effect on IL-11/ERK1/2 signaling independent of TGF-β signaling by using an IL-11-induced HK-2 cells fibrosis model. Osthole treatment decreased the protein expression of α-SMA, collagen I and fibronectin without changing their mRNA levels in IL-11-induced HK-2 cells. Moreover, it was observed that the IL-11/ERK1/2 inhibitor, U0126, partly blocked the antifibrogenic effects of osthole. Conclusion: In this study, we found that osthole has a previously unrecognized role in inhibiting IL-11/ERK1/2 signaling pathway. Our work demonstrated that the antifibrogenic effect of osthole is not only mediated by TGF-β/Smad2/3 signaling, but also directly mediated by IL-11/ERK1/2 signaling pathway independent of TGF-β1 signaling.
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Affiliation(s)
- Fan Wu
- Institute of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Zhao
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qingqing Shao
- Institute of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ke Fang
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ruolan Dong
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shujun Jiang
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fuer Lu
- Institute of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinlong Luo
- Department of Emergency, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Guang Chen
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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24
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Li W, Hao X, Liu Y, Tong T, Xu H, Jia L. Effects of anesthetic agents on inflammation in Caco-2, HK-2 and HepG2 cells. Exp Ther Med 2021; 21:487. [PMID: 33790996 DOI: 10.3892/etm.2021.9918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 11/02/2020] [Indexed: 11/05/2022] Open
Abstract
Anesthetic agents are often used in surgical procedures to relieve pain in patients with traumatic injuries. Several anesthetic agents can cause immunosuppression by suppressing the secretion of immune factors such as cytokines. However, the effects of different anesthetic agents on inflammation are not completely understood. In the present study, three cell lines, Caco-2, HK-2 and HepG2, were treated with five anesthetic agents, including sodium barbiturate, midazolam, etomidate, ketamine and propofol, to investigate the effects of different anesthetic agents on inflammation in in vitro models. The expression levels of inflammatory genes, including NF-κB and its downstream cytokines, were detected via reverse transcription-quantitative PCR. The results indicated that anesthetic agents, including sodium barbiturate, ketamine and propofol, but not midazolam and etomidate, exerted significant inhibitory effects on NF-κB expression in the three different cell lines. Sodium barbiturate, ketamine and propofol also decreased the expression levels of the NF-κB downstream cytokines, including IL-1β and IL-18. Moreover, sodium barbiturate, ketamine and propofol reduced the effect of TNF-α on inflammatory activity in the three cell lines. The results of the present study may provide novel insight into the effects of anesthetic agents on inflammation and may aid with selecting the most appropriate anesthetic agent in surgical procedures.
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Affiliation(s)
- Weijing Li
- Department of Anesthesiology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Xiaoguang Hao
- Department of Radiology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Yan Liu
- Department of Anesthesiology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Tong Tong
- Department of Anesthesiology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Hongmeng Xu
- Department of Anesthesiology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Li Jia
- Department of Anesthesiology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
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25
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Yu S, Palanisamy K, Sun K, Li X, Wang Y, Lin F, Chen K, Wang I, Yu T, Li C. Human antigen R regulates hypoxia-induced mitophagy in renal tubular cells through PARKIN/BNIP3L expressions. J Cell Mol Med 2021; 25:2691-2702. [PMID: 33496385 PMCID: PMC7933924 DOI: 10.1111/jcmm.16301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/29/2020] [Accepted: 01/05/2021] [Indexed: 12/27/2022] Open
Abstract
Mitochondrial dysfunction contributes to the pathophysiology of acute kidney injury (AKI). Mitophagy selectively degrades damaged mitochondria and thereby regulates cellular homeostasis. RNA-binding proteins (RBPs) regulate RNA processing at multiple levels and thereby control cellular function. In this study, we aimed to understand the role of human antigen R (HuR) in hypoxia-induced mitophagy process in the renal tubular cells. Mitophagy marker expressions (PARKIN, p-PARKIN, PINK1, BNIP3L, BNIP3, LC3) were determined by western blot analysis. Immunofluorescence studies were performed to analyze mitophagosome, mitolysosome, co-localization of p-PARKIN/TOMM20 and BNIP3L/TOMM20. HuR-mediated regulation of PARKIN/BNIP3L expressions was determined by RNA-immunoprecipitation analysis and RNA stability experiments. Hypoxia induced mitochondrial dysfunction by increased ROS, decline in membrane potential and activated mitophagy through up-regulated PARKIN, PINK1, BNIP3 and BNIP3L expressions. HuR knockdown studies revealed that HuR regulates hypoxia-induced mitophagosome and mitolysosome formation. HuR was significantly bound to PARKIN and BNIP3L mRNA under hypoxia and thereby up-regulated their expressions through mRNA stability. Altogether, our data highlight the importance of HuR in mitophagy regulation through up-regulating PARKIN/BNIP3L expressions in renal tubular cells.
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Affiliation(s)
- Shao‐Hua Yu
- Graduate Institute of Biomedical SciencesChina Medical UniversityTaichungTaiwan
- Department of Emergency MedicineChina Medical University HospitalTaichungTaiwan
| | | | - Kuo‐Ting Sun
- Department of Pediatric DentistryChina Medical University HospitalTaichungTaiwan
- School of Dentistry, College of DentistryChina Medical UniversityTaichungTaiwan
| | - Xin Li
- Graduate Institute of Biomedical SciencesChina Medical UniversityTaichungTaiwan
| | - Yao‐Ming Wang
- Department of RadiologyTaichung Tzu Chi HospitalBuddhist Tzu Chi Medical FoundationTaichungTaiwan
| | - Feng‐Yen Lin
- Department of Internal MedicineSchool of MedicineCollege of MedicineTaipei Medical UniversityTaipeiTaiwan
- Division of Cardiology and Cardiovascular Research CenterTaipei Medical University HospitalTaipeiTaiwan
| | - Kuen‐Bao Chen
- School of MedicineChina Medical UniversityTaichungTaiwan
- Department of AnesthesiologyChina Medical University HospitalTaichungTaiwan
| | - I‐Kuan Wang
- Graduate Institute of Biomedical SciencesChina Medical UniversityTaichungTaiwan
- School of MedicineChina Medical UniversityTaichungTaiwan
- Division of NephrologyChina Medical University HospitalTaichungTaiwan
| | - Tung‐Min Yu
- Graduate Institute of Biomedical SciencesChina Medical UniversityTaichungTaiwan
- Division of NephrologyDepartment of Internal MedicineTaichung Veterans General HospitalTaichungTaiwan
| | - Chi‐Yuan Li
- Graduate Institute of Biomedical SciencesChina Medical UniversityTaichungTaiwan
- Department of AnesthesiologyChina Medical University HospitalTaichungTaiwan
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26
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Mossoba ME, Mapa MST, Sprando J, Araujo M, Sprando RL. Evaluation of transporter expression in HK-2 cells after exposure to free and ester-bound 3-MCPD. Toxicol Rep 2021; 8:436-442. [PMID: 33717996 PMCID: PMC7932896 DOI: 10.1016/j.toxrep.2021.02.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 02/18/2021] [Accepted: 02/20/2021] [Indexed: 12/22/2022] Open
Abstract
3-Monochloropropane-1,2-diol (3-MCPD) and its fatty acid esters have the potential to induce nephrotoxicity. We used an in vitro cellular model of human proximal tubule cells to test the effects of 3-MCPD compound exposures on transporter gene expression. 3-MCPD-related nephrotoxicity could be associated with indirect modes of action relating to aquaporin homeostasis.
3-Monochloropropane-1,2-diol (3-MCPD) is a food processing contaminant in some infant formula products and other foods in the United States. Although rodent studies have demonstrated that 3-MCPD and its palmitic esters have the potential to induce nephrotoxicity, our recent human cell culture studies using the human renal proximal tubule cell line HK-2 have not strongly supported this finding. Considering this disparity, we sought to examine whether changes in transporter gene expression on proximal tubule cells could be modulated by these compounds and allow us to glean mechanistic information on a possible indirect path to proximal tubule injury in vivo. If fundamental processes like water and solute transport could be disrupted by 3-MCPD compounds, then a new avenue of toxicity could be further explored in both infant and adult models. In our current study, we used HK-2 cells as an in vitro cellular model of human proximal tubule cells to investigate the effects of low (10 μM) and high (100 μM) 3-MCPD compound exposures to these cells for 24 hours (h) on the expression of 20 transporter genes that are known to be relevant to proximal tubules. Although we detected consistent upregulation of AQP1 expression at the RNA transcript level following HK-2 treatment with both low and high doses of several ester-bound 3-MCPD compounds, these increases were not associated with statistically significant elevations in their protein expression levels. Moreover, we observed a lack of modulation of other members of the AQP protein family that are known to be expressed by human proximal tubule cells. Overall, our study suggests the possibility that 3-MCPD-related nephrotoxicity could be associated with indirect modes of action relating to aquaporin homeostasis, but additional studies with other human-derived models would be pertinent to further explore these findings and to better understand transporter expression differences under different stages of proximal tubule development.
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Key Words
- 1-Li, 1-Linoleoyl-3-chloropropanediol
- 1-Ol, 1-Oleoyl-3-chloropropanediol
- 1-Pa, 1-Palmitoyl-3-chloropropanediol
- 3-MCPD, 3-Monochloropropane-1,2-diol
- 3-Monochloropropane-1,2-diol
- HK-2
- HK-2, Human Kidney-2
- Kidney
- Li, Linoleic Acid
- Li-Li, 1,2-Di-linoleoyl-3-chloropropanediol
- Ol, Oleic Acid
- Ol-Li, 1-Oleoyl-2-linoleoyl-3-chloropropanediol
- Ol-Ol, 1,2-Di-oleoyl-3-chloropropanediol
- PMA, Phenylmercuric Acetate
- Pa, Palmitic Acid
- Pa-Li, 1-Palmitoyl-2-linoleoyl-3-chloropropanediol
- Pa-Ol, 1-Palmitoyl-2-oleoyl-3-chloropropanediol
- Pa-Pa, 1,2-Di-palmitoyl-3-chloropropanediol
- VAL, Valproic Acid
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Affiliation(s)
- Miriam E Mossoba
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DT), Laurel, MD, 20817, United States
| | - Mapa S T Mapa
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DT), Laurel, MD, 20817, United States
| | - Jessica Sprando
- Virginia-Maryland College of Veterinary Medicine, 205 Duck Pond Road, Blacksburg, VA, 24061, United States
| | - Magali Araujo
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DT), Laurel, MD, 20817, United States
| | - Robert L Sprando
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DT), Laurel, MD, 20817, United States
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Kellnerová S, Chatterjee S, Bayarri-Olmos R, Justesen L, Talasz H, Posch W, Kenno S, Garred P, Orth-Höller D, Grasse M, Würzner R. Shiga Toxin 2a Binds to Complement Components C3b and C5 and Upregulates Their Gene Expression in Human Cell Lines. Toxins (Basel) 2020; 13:8. [PMID: 33374102 DOI: 10.3390/toxins13010008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/16/2020] [Accepted: 12/22/2020] [Indexed: 01/06/2023] Open
Abstract
Enterohemorrhagic Escherichia coli (EHEC) infections can cause EHEC-associated hemolytic uremic syndrome (eHUS) via its main virulent factor, Shiga toxins (Stxs). Complement has been reported to be involved in the progression of eHUS. The aim of this study was to investigate the interactions of the most effective subtype of the toxin, Stx2a, with pivotal complement proteins C3b and C5. The study further examined the effect of Stx2a stimulation on the transcription and synthesis of these complement proteins in human target cell lines. Binding of Stx2a to C3b and C5 was evaluated by ELISA. Kidney and gut cell lines (HK-2 and HCT-8) were stimulated with varied concentrations of Stx2a. Subsequent evaluation of complement gene transcription was studied by real-time PCR (qPCR), and ELISAs and Western blots were performed to examine protein synthesis of C3 and C5 in supernatants and lysates of stimulated HK-2 cells. Stx2a showed a specific binding to C3b and C5. Gene transcription of C3 and C5 was upregulated with increasing concentrations of Stx2a in both cell lines, but protein synthesis was not. This study demonstrates the binding of Stx2a to complement proteins C3b and C5, which could potentially be involved in regulating complement during eHUS infection, supporting further investigations into elucidating the role of complement in eHUS pathogenesis.
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Li G, Qin Y, Qin S, Zhou X, Zhao W, Zhang D. Circ_WBSCR17 aggravates inflammatory responses and fibrosis by targeting miR-185-5p/SOX6 regulatory axis in high glucose-induced human kidney tubular cells. Life Sci 2020; 259:118269. [PMID: 32798559 DOI: 10.1016/j.lfs.2020.118269] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 08/03/2020] [Accepted: 08/10/2020] [Indexed: 01/18/2023]
Abstract
BACKGROUND Diabetic nephropathy (DN), a severe microvascular complication of diabetes, has complex pathogenesis. Circular RNAs (circRNAs) exert broad biological functions on human diseases. This study intended to explore the role and mechanism of circ_WBSCR17 in DN. METHODS DN mice models were constructed using streptozotocin injection, and DN cell models were assembled using high glucose (HG) treatment in human kidney 2 cells (HK-2). The expression of circ_WBSCR17, miR-185-5p and SRY-Box Transcription Factor 6 (SOX6) was detected by quantitative real-time polymerase chain reaction (qRT-PCR). The protein levels of SOX6 and fibrosis markers were examined by western blot. The release of inflammatory cytokines, cell proliferation and apoptosis, were assessed by enzyme-linked immunosorbent assay (ELISA), cell counting kit-8 (CCK-8) assay and flow cytometry assay, respectively. The predicted interaction between miR-185-5p and circ_WBSCR17 or SOX6 was verified by dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. RESULT Circ_WBSCR17 was highly expressed in DN mice models and HG-induced HK-2 cells. Circ_WBSCR17 knockdown or SOX6 knockdown promoted cell proliferation and blocked cell apoptosis, inflammatory responses and fibrosis, while circ_WBSCR17 overexpression or SOX6 overexpression conveyed the opposite effects. MiR-185-5p was a target of circ_WBSCR17 and directly bound to SOX6. MiR-185-5p could reverse the role of circ_WBSCR17 or SOX6. Moreover, the expression of SOX6 was modulated by circ_WBSCR17 through intermediating miR-185-5p. CONCLUSION Circ_WBSCR17 triggered the dysfunction of HG-induced HK-2 cells, including inflammatory responses and fibrosis, which was accomplished via the miR-185-5p/SOX6 regulatory axis.
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Affiliation(s)
- Guangzhi Li
- Department of Basic Medica, Jiangsu College of Nursing, Huaian, Jiangsu 223005, China
| | - Yongting Qin
- Department of Basic Medica, Jiangsu College of Nursing, Huaian, Jiangsu 223005, China
| | - Shuangli Qin
- Department of Basic Medica, Jiangsu College of Nursing, Huaian, Jiangsu 223005, China
| | - Xun Zhou
- Department of Basic Medica, Jiangsu College of Nursing, Huaian, Jiangsu 223005, China
| | - Wenhui Zhao
- Department of Basic Medica, Jiangsu College of Nursing, Huaian, Jiangsu 223005, China
| | - Dongmei Zhang
- College of Pharmacy and Traditional Chinese Medicine, Jiangsu College of Nursing, Huaian, Jiangsu 223005, China.
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29
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Mossoba ME, Mapa MST, Araujo M, Zhao Y, Flannery B, Flynn T, Sprando J, Wiesenfeld P, Sprando RL. Long-term in vitro effects of exposing the human HK-2 proximal tubule cell line to 3-monochloropropane-1,2-diol. J Toxicol Sci 2020; 45:45-56. [PMID: 31932557 DOI: 10.2131/jts.45.45] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
3-Monochloropropane-1,2-diol (3-MCPD) is a food processing contaminant in the U.S. food supply, detected in infant formula. In vivo rodent model studies have identified a variety of possible adverse outcomes from 3-MCPD exposure including renal effects like increased kidney weights, tubular hyperplasia, kidney tubular necrosis, and chronic progressive nephropathy. Given the lack of available in vivo toxicological assessments of 3-MCPD in humans and the limited availability of in vitro human cell studies, the health effects of 3-MCPD remain unclear. We used in vitro human proximal tubule cells represented by the HK-2 cell line to compare short- and long-term consequences to continuous exposure to this compound. After periodic lengths of exposure (0-100 mM) ranging from 1 to 16 days, we evaluated cell viability, mitochondrial integrity, oxidative stress, and a specific biomarker of proximal tubule injury, Kidney Injury Molecule-1 (KIM-1). Overall, we found that free 3-MCPD was generally more toxic at high concentrations or extended durations of exposure, but that its overall ability to induce cell injury was limited in this in vitro system. Further experiments will be needed to conduct a comprehensive safety assessment in infants who may be exposed to 3-MCPD through consumption of infant formula, as human renal physiology changes significantly during development.
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Affiliation(s)
- Miriam E Mossoba
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Applied Regulatory Toxicology (DART), Neurotoxicology and In vitro Toxicology Branch (NIVTB), USA
| | - Mapa S T Mapa
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Applied Regulatory Toxicology (DART), Neurotoxicology and In vitro Toxicology Branch (NIVTB), USA
| | - Magali Araujo
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Applied Regulatory Toxicology (DART), Neurotoxicology and In vitro Toxicology Branch (NIVTB), USA
| | - Yang Zhao
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Applied Regulatory Toxicology (DART), Neurotoxicology and In vitro Toxicology Branch (NIVTB), USA
| | - Brenna Flannery
- U.S. FDA, CFSAN, Office of Analytics and Outreach (OAO), Division of Risk and Decision Analysis (DRDA), Contaminant Assessment Branch (CAB), USA
| | - Thomas Flynn
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Applied Regulatory Toxicology (DART), Neurotoxicology and In vitro Toxicology Branch (NIVTB), USA
| | | | - Paddy Wiesenfeld
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Applied Regulatory Toxicology (DART), Neurotoxicology and In vitro Toxicology Branch (NIVTB), USA
| | - Robert L Sprando
- U.S. Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Applied Regulatory Toxicology (DART), Neurotoxicology and In vitro Toxicology Branch (NIVTB), USA
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30
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Abstract
The renal proximal tubule cell line, human kidney 2 (HK-2), recapitulates many of the functional cellular and molecular characteristics of differentiated primary proximal tubule cells. These features include anchorage dependence, gluconeogenesis capability, and sodium-dependent sugar transport. In order to ascertain how well HK-2 cells can reliably reveal the toxicological profile of compounds having a potential to cause proximal tubule injury in vivo, we sought to evaluate the effects of known proximal tubule toxicants using the HK-2 cell line. We selected 20 pure nephrotoxic compounds that included chemotherapeutic drugs, antibiotics, and heavy metal-containing compounds and evaluated their ability to induce HK-2 cell injury relative to 10 innocuous pure compounds or cell culture media alone. We performed a comprehensive set of in vitro cellular toxicological assays to evaluate cell viability, oxidative stress, mitochondrial integrity, and a specific biomarker of renal injury, Kidney Injury Molecule 1. For each of our selected compounds, we were able to establish a reproducible profile of toxicological outcomes. We compared our results to those described in peer-reviewed publications to understand how well the HK-2 cellular model agrees with overall in vivo rat or human toxicological outcomes. This study begins to address the question of how well in vitro data generated with HK-2 cells can mirror in vivo animal and human outcomes.
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Affiliation(s)
- Miriam E Mossoba
- Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, 4137US Food and Drug Administration, Laurel, MD, USA
| | - Robert L Sprando
- Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, 4137US Food and Drug Administration, Laurel, MD, USA
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Wang NN, Zhang PZ, Zhang J, Wang HN, Li L, Ren F, Dai PF, Li H, Lv XF. Penfluridol triggers mitochondrial-mediated apoptosis and suppresses glycolysis in colorectal cancer cells through down-regulating hexokinase-2. Anat Rec (Hoboken) 2020; 304:520-530. [PMID: 32470200 DOI: 10.1002/ar.24464] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 03/01/2020] [Accepted: 03/22/2020] [Indexed: 01/22/2023]
Abstract
Penfluridol, a commonly used antipsychotic agent in a clinical setting, exhibits potential anticancer properties against various human malignancies. Here, we investigated the effect of penfluridol on the biological behavior of colorectal cancer (CRC) cells. Cell viability and clonogenic potential were detected by the cell counting kit-8 and colony formation assay. The cell apoptosis and cell cycle distribution were quantified through flow cytometry. Caspase-3 activity, glucose consumption, lactate production, and intracellular ATP levels were evaluated using the corresponding commercial detection kits. The protein levels of related genes were detected through western blotting. Mitochondrial membrane potential was detected using JC-1 staining. A CRC xenograft tumor model was used to validate the antitumor activity of penfluridol in vivo. Penfluridol reduced cell survival and promoted apoptotic cell death effectively through the mitochondria-mediated intrinsic pathway in a dose-dependent manner. Furthermore, the process of glycolysis in HCT-116 and HT-29 cells was inhibited upon penfluridol treatment, as evidenced by the decrease in glucose consumption, lactate production, and intracellular ATP levels. Further mechanistic studies revealed that penfluridol influenced cell apoptosis and glycolysis in CRC cells by downregulating hexokinase-2 (HK-2). The proapoptotic effect and glycolytic inhibition-induced by penfluridol were effectively reversed by HK-2 overexpression. Consistent with in vitro results, penfluridol could also suppress tumor growth and trigger apoptosis in vivo. Penfluridol triggers mitochondrial-mediated apoptosis and induces glycolysis inhibition via modulating HK-2 in CRC and provides a theoretical basis to support penfluridol as a repurposed drug for CRC patients.
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Affiliation(s)
- Ning-Ning Wang
- Department of Intervention Diagnosis and Treatment, Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser Hospital), Qingdao, China
| | - Peng-Zhen Zhang
- Department of Intervention Diagnosis and Treatment, Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser Hospital), Qingdao, China
| | - Jing Zhang
- Department of Intervention Diagnosis and Treatment, Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser Hospital), Qingdao, China
| | - Hai-Ning Wang
- Department of Cosmetic Surgery, Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser Hospital), Qingdao, China
| | - Ling Li
- Department of Outpatient, Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser Hospital), Qingdao, China
| | - Feng Ren
- Endoscopic Consulting Room, Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser Hospital), Qingdao, China
| | - Peng-Fei Dai
- Coronary Care Unit, Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser Hospital), Qingdao, China
| | - Hui Li
- Hemodialysis Room, Qingdao Hospital of Traditional Chinese Medicine (Qingdao Hiser Hospital), Qingdao, China
| | - Xiao-Feng Lv
- Department of Pharmacy, Reproductive Medicine Center of Zibo Maternity and Child Health Hospital, Zibo, China
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Wang IK, Palanisamy K, Sun KT, Yu SH, Yu TM, Li CH, Lin FY, Chou AK, Wang GJ, Chen KB, Li CY. The functional interplay of lncRNA EGOT and HuR regulates hypoxia-induced autophagy in renal tubular cells. J Cell Biochem 2020; 121:4522-4534. [PMID: 32030803 DOI: 10.1002/jcb.29669] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 01/16/2020] [Indexed: 12/20/2022]
Abstract
Autophagy, an important cellular homeostatic mechanism regulates cell survival under stress and protects against acute kidney injury. However, the role of long noncoding RNA (lncRNA) in autophagy regulation in renal tubular cells (HK-2) is unclear. The study was aimed to understand the importance of lncRNA in hypoxia-induced autophagy in HK-2 cells. LncRNA eosinophil granule ontogeny transcript (EGOT) was identified as autophagy-associated lncRNA under hypoxia. The lncRNA EGOT expression was significantly downregulated in renal tubular cells during hypoxia-induced autophagy. Gain- and loss-of-EGOT functional studies revealed that EGOT overexpression reduced autophagy by downregulation of ATG7, ATG16L1, LC3II expressions and LC 3 puncta while EGOT knockdown reversed the suppression of autophagy. Importantly, RNA-binding protein, (ELAVL1)/Hu antigen R (HuR) binds and stabilizes the EGOT expression under normoxia and ATG7/16L1 expressions under hypoxia. Furthermore, HuR mediated stabilization of ATG7/16L1 expressions under hypoxia causes a decline in EGOT levels and thereby promotes autophagy. Altogether, the study first reveals the functional interplay of lncRNA EGOT and HuR on the posttranscriptional regulation of the ATG7/16L1 expressions. Thus, the HuR/EGOT/ATG7/16L1 axis is crucial for hypoxia-induced autophagy in renal tubular cells.
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Affiliation(s)
- I-Kuan Wang
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Division of Nephrology, China Medical University Hospital, Taichung, Taiwan.,Department of Internal Medicine, College of Medicine, China Medical University, Taichung, Taiwan
| | - Kalaiselvi Palanisamy
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Kuo-Ting Sun
- Department of Pediatric Dentistry, China Medical University Hospital, Taichung, Taiwan.,School of Dentistry, China Medical University, Taichung, Taiwan
| | - Shao-Hua Yu
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Emergency Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Tung-Min Yu
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Division of Nephrology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Ching-Hao Li
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Feng-Yen Lin
- Department of Internal Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Division of Cardiology and Cardiovascular Research Center, Taipei Medical University Hospital, Taipei, Taiwan
| | - An-Kuo Chou
- School of Medicine, China Medical University, Taichung, Taiwan.,Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan
| | - Guei-Jane Wang
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan
| | - Kuen-Bao Chen
- School of Medicine, China Medical University, Taichung, Taiwan.,Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan
| | - Chi-Yuan Li
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan
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Wang W, Jia YJ, Yang YL, Xue M, Zheng ZJ, Wang L, Xue YM. LncRNA GAS5 exacerbates renal tubular epithelial fibrosis by acting as a competing endogenous RNA of miR-96-5p. Biomed Pharmacother 2019; 121:109411. [PMID: 31810140 DOI: 10.1016/j.biopha.2019.109411] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 08/24/2019] [Accepted: 08/28/2019] [Indexed: 12/12/2022] Open
Abstract
Renal fibrosis is at the core of various renal diseases, including diabetic kidney disease (DKD). Long noncoding RNAs (lncRNAs) are known players in the regulation of renal fibrosis. However, their expression and function in DKD still need to be elucidated. The purpose of this study was to assess how lncRNA GAS5 regulates fibrosis and its mechanism in TGF-β1-treated renal proximal tubular cell.In this study, the lncRNA GAS5 was upregulated in both TGF-β1-treated HK-2 cells and the kidneys of HDF/STZ mice. Knockdown of GAS5 relieved renal tubular epithelial fibrosis. This effect was mediated by the downregulation and functional inactivation of miR-96-5p. Furthermore, miR-96-5p was downregulated in DKD mice, and this downregulation attenuated the repression of FN1(fibronectin, FN) and led to its upregulation. The decrease in miR-96-5p was partially attributed to the miRNA-sponge action of GAS5.Our research demonstrates that knockdown of lncRNA GAS5 leads to antifibrosis by competitively binding miR-96-5p, which inhibits the expression of FN1. These results indicate that targeting lncRNA GAS5 may be a promising therapeutic strategy for preventing DKD.
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Affiliation(s)
- Wei Wang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Endocrinology and Metabolism, Second Affiliated Hospital of Jinan University, Shenzhen, Guangdong, China; Department of Endocrinology and Metabolism, Shenzhen People's Hospital, Shenzhen, Guangdong, China
| | - Yi-Jie Jia
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Yan-Ling Yang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Meng Xue
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Endocrinology and Metabolism, Second Affiliated Hospital of Jinan University, Shenzhen, Guangdong, China; Department of Endocrinology and Metabolism, Shenzhen People's Hospital, Shenzhen, Guangdong, China
| | - Zong-Ji Zheng
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Ling Wang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Yao-Ming Xue
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
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Mossoba ME, Mapa MST, Araujo M, Zhao Y, Flannery B, Flynn T, Sprando J, Wiesenfeld P, Sprando RL. In vitro toxicological assessment of free 3-MCPD and select 3-MCPD esters on human proximal tubule HK-2 cells. Cell Biol Toxicol 2020; 36:209-21. [PMID: 31686351 DOI: 10.1007/s10565-019-09498-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 10/03/2019] [Indexed: 10/25/2022]
Abstract
Chloropropanols are chemical contaminants that can be formed during industrial processing of foods, such as lipids used in commercially available infant and toddler formula in the USA. Many researchers have studied the most common chloropropanol contaminant, 3-monochloropropane-1,2-diol (3-MCPD), as well as its lipid ester derivatives. A plethora of toxicological outcomes have been described in vivo, including effects on the heart, nervous system, reproductive organs, and kidneys. To better understand the concordance of some of these effects to in vitro outcomes, we focused our research on using an in vitro cellular model to investigate whether the proximal tubule cells of the kidney would be vulnerable to the effects of free 3-MCPD and nine of its common esters in commercial formula. Using the established human kidney proximal tubule cell line, HK-2, we performed 24-h treatments using 3-MCPD and nine mono- or di-esters derived from palmitate, oleate, and linoleate. By directly exposing HK-2 cells at treatment doses ranging from 0 to 100 μM, we could evaluate their effects on cell viability, mitochondrial health, reactive oxygen species (ROS) production, and other endpoints of toxicity. Since chloropropanols reportedly inhibit cellular metabolism through interference with glycolysis, we also tested the extent of this mechanism. Overall, we found mild but statistically significant evidence of cytotoxicity at the highest tested treatment concentrations, which were also associated with mitochondrial dysfunction and transient perturbations in cellular metabolism. Based on these findings, further studies will be required to better understand the effects of these compounds under conditions that are more physiologically relevant to human infant and toddler proximal tubules in order to mimic their exposure to chloropropanol-containing foods.
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Li W, Jiang YH, Wang Y, Zhao M, Hou GJ, Hu HZ, Zhou L. Protective Effects of Combination of Radix Astragali and Radix Salviae Miltiorrhizae on Kidney of Spontaneously Hypertensive Rats and Renal Intrinsic Cells. Chin J Integr Med 2019; 26:46-53. [PMID: 31388973 DOI: 10.1007/s11655-019-3071-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/12/2018] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate the effects of combination of Radix Astragali (RA) and Radix Salviae Miltiorrhizae (RS) on kidney of spontaneously hypertensive rats (SHRs) and renal intrinsic cells. METHODS SHRs were intragastrically administrated with RA (5.09 g/kg) and RS (2.55 g/kg) either alone or with combination for 4 weeks; valsartan (13.35 mg/kg) was used as a positive control. Blood pressure and renal ultrasonography were monitored periodically. The biomarkers [microalbumin (mALB), cystatin ^C, angiotensin II (Ang II), interleukin-1 beta (IL-1β), and β2-microglobulin (β2-Mg), etc.] in serum and urine were measured by enzyme-linked immunosorbent assay (ELISA). The protein expressions [phosphorylated adenosine 5'-monophosphate-activated protein kinase-α1 (p-AMPKα1), sestrin-β, calcium/calmodulin-dependent protein kinase kinase-β (CaMKK-β), phosphoinositide 3-kinases (PI3K), serine-threonine protein kinase 1 (AKT1), and vascular endothelial growth factor receptor 2 (VEGFR2)] in renal cortex were determined by Western blot. In vitro, the hypertensive cellular model was established by applying 2×10-6 mol/L Ang ^II. The primary human podocytes, human glomerular endothelial cells (HRGECs), and human proximal tubular epithelial cells (HK-2s) were pre-incubated with sulfotanshinone sodium (Tan, 10 μg/mL) and/or calycosin-7-O-β-D-glucoside (Cal, 5 μg/mL). The cellular viability and apoptosis were assayed by 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) and Annexin V/PI staining, respectively. The level of endothelial nitric oxide synthase (eNOS) in culture supernatant was determined by ELISA. RESULTS RA+RS signifificantly decreased the diastolic blood pressure, renal vascular resistance index, and parenchymal thickness, increased 24 h urinary volume as well as lowered the levels of urine mALB and serum cystatin ^C, IL-1β and β2-Mg of SHRs (P <0.05 vs. SHRs). The decreased protein levels of p-AMPKα1, sestrinβ and CaMKK-β and the increased protein levels of PI3K, AKT1 and VEGFR2 in renal cortex of SHRs were normalized after RA+RS treatment (P <0.05). In vitro, Tan and Cal attenuated the Ang II-induced abnormal proliferation and increased the apoptosis of HRGECs and HK-2s and improved the level of eNOS in culture supernatant. Whereas, neither of them showed powerful effect on podocyte. CONCLUSION The combination of RA and RS had potential effects on alleviating the renal damages of SHRs and the renoprotection was independent of blood pressure level.
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Affiliation(s)
- Wei Li
- Department of Nephrology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, China.
| | - Yue-Hua Jiang
- Central Laboratory, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, China
| | - Yan Wang
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Meng Zhao
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Guang-Jian Hou
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Hong-Zhen Hu
- Department of Nephrology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, China
| | - Le Zhou
- Department of Nephrology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, China
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36
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Xi J, Jing J, Zhang Y, Liang C, Hao Z, Zhang L, Chen Y. SIRT3 inhibited the formation of calcium oxalate-induced kidney stones through regulating NRF2/HO-1 signaling pathway. J Cell Biochem 2019; 120:8259-8271. [PMID: 30548662 DOI: 10.1002/jcb.28109] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 10/29/2018] [Indexed: 01/24/2023]
Abstract
Oxidative stress is important for the calcium oxalate (CaOx)-induced kidney stone formation. Sirtuin 3 (SIRT3) plays an essential role in the amelioration of oxidative damages. This study aims to explore the effect of SIRT3 on the formation of CaOx-induced kidney stones and the underlying mechanism. SIRT3 expression in renal tissues was detected by immunohistochemistry. Apoptosis in renal tissues was examined by TUNEL staining. Crystal-cell adherence and cell apoptosis in HK-2 cells were assessed by analyzing Ca2+ concentration and by the flow cytometry analysis, respectively. Protein expression of SIRT3, nuclear factor erythroid 2-related factor (NRF2), heme oxygenase-1 (HO-1), and Bax in renal tissues or HK-2 cells was examined by Western blot analysis. Renal pathological changes and the adhesion of CaOx crystals in the kidneys were examined by hematoxylin-eosin and von Kossa staining, respectively. Human kidneys with stones showed enhanced renal apoptosis, downregulated SIRT3 expression, and upregulated NRF2/HO-1 expression, compared with the controls. Furthermore, SIRT3 overexpression inhibited the CaOx-induced promotion of crystal-cell adherence and cell apoptosis in human proximal tubular cell line HK-2 cells, which was reversed by the NRF2 knockdown. Moreover, our in vivo assay further confirmed that SIRT3 overexpression alleviated the glyoxylate administration-induced renal damage, renal apoptosis, and crystals deposition in the kidneys from the stone model mice, which was also associated with its activation of the NRF2/HO-1 pathway. Our findings support the notion that overexpression of SIRT3 may inhibit the formation of CaOx-induced kidney stones, at least in part, through regulating the NRF2/HO-1 signaling pathway.
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Affiliation(s)
- Junhua Xi
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei, Anhui, China.,Institute of Urology, Anhui Medical University, Hefei, Anhui, China.,Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, Anhui, China.,Department of Urology, Hefei Hospital Affiliated to Anhui Medical University, Hefei, Anhui, China
| | - Junfeng Jing
- Department of Urology, Hefei Hospital Affiliated to Anhui Medical University, Hefei, Anhui, China
| | - Yanbin Zhang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei, Anhui, China.,Institute of Urology, Anhui Medical University, Hefei, Anhui, China.,Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, Anhui, China.,Department of Urology, Hefei Hospital Affiliated to Anhui Medical University, Hefei, Anhui, China
| | - Chaozhao Liang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei, Anhui, China.,Institute of Urology, Anhui Medical University, Hefei, Anhui, China.,Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, Anhui, China
| | - Zongyao Hao
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei, Anhui, China.,Institute of Urology, Anhui Medical University, Hefei, Anhui, China.,Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, Anhui, China
| | - Li Zhang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei, Anhui, China.,Institute of Urology, Anhui Medical University, Hefei, Anhui, China.,Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, Anhui, China
| | - Yang Chen
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei, Anhui, China.,Institute of Urology, Anhui Medical University, Hefei, Anhui, China.,Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, Anhui, China
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Yin J, Xu R, Wei J, Zhang S. The protective effect of glutaredoxin 1/DJ-1/HSP70 signaling in renal tubular epithelial cells injury induced by ischemia. Life Sci 2019; 223:88-94. [PMID: 30858124 DOI: 10.1016/j.lfs.2019.03.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 03/07/2019] [Indexed: 12/20/2022]
Abstract
AIMS Gluaredoxin1 (GRX1) is an important protein of the cellular antioxidant defense system, but its role in renal epithelial cell injury caused by ischemia remains unclear. In this study, we aimed to gain insight into the role of GRX1 in HK-2 cells with oxygen glucose deprivation (OGD) injury, which served as an in vitro cell model of renal epithelial cell ischemic injury. We investigated the underlying regulation of GRX1, DJ-1, and HSP70 as well as the role of the GRX1/DJ-1/HSP70 signaling pathway in this model. MATERIALS AND METHODS The protein and mRNA expressions were measured by Western blot and qRT-PCR assays, respectively. GRX1 was overexpressed by transfection of pcDNA.3.1-GRX1 and DJ-1 was inhibited by transfection with DJ-1 siRNA. Cell apoptosis, caspase-3 activity, lactate dehydrogenase (LDH) leakage, or superoxide dismutase (SOD) content was tested by the related detection kit. Reactive oxygen species (ROS) level was detected via carboxy-H2DCF-DA. KEY FINDINGS We found that GRX1 was distinctly down-regulated in HK-2 cells after incubation under the OGD condition. GRX1 overexpression markedly constrained cell apoptosis, caspase-3 activity, LDH leakage, and the ROS level, while SOD content was elevated. GRX1 up-regulation increased DJ-1 and HSP70 protein expression, while DJ-1 inhibition significantly offset the effect of GRX1 overexpression on HSP70, indicating that GRX1 could regulate HSP70 via control of DJ-1. Moreover, we observed that HSP70 inhibition removed the constraints imposed by GRX1 overexpression on ROS level, LDH leakage, and caspase-3 activity. SIGNIFICANCE Overall, this study showed that GRX1 minimizes cell injury and apoptosis in HK-2 cells under OGD conditions via regulation of DJ-1 and HSP70 expression.
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Affiliation(s)
- Jian Yin
- Department of Vascular Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Ruisi Xu
- Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Jun Wei
- Department of Pharmacology Base, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Siqi Zhang
- Department of Nephrology, China-Japan Union Hospital of Jilin University, Changchun 130033, China.
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Lu YT, Ma XL, Xu YH, Hu J, Wang F, Qin WY, Xiong WY. A Fluorescent Glucose Transport Assay for Screening SGLT2 Inhibitors in Endogenous SGLT2-Expressing HK-2 Cells. Nat Prod Bioprospect 2019; 9:13-21. [PMID: 30387082 PMCID: PMC6328422 DOI: 10.1007/s13659-018-0188-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 10/18/2018] [Indexed: 05/02/2023]
Abstract
The sodium-dependent glucose transporters 2 (SGLT2) plays important role in renal reabsorption of urinal glucose back to plasma for maintaining glucose homeostasis. The approval of SGLT2 inhibitors for treatment of type 2 diabetes highlights the SGLT2 as a feasible and promising drug target in recent years. Current methods for screening SGLT2 inhibitors are complex, expensive and labor intensive. Particularly, these methods cannot directly measure nonradioactive glucose uptake in endogenous SGLT2-expressing kidney cells. In present work, human kidney cells, HK-2, was incubated with a fluorescent D-glucose derivant 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl) amino]-2-deoxy-D-glucose (2-NBDG) and the fluorescent intensity of 2-NBDG was employed to measure the amount of glucose uptake into the cells. By optimizing the passages of HK-2 cells, 2-NBDG concentration and incubation time, and by measuring glucose uptake treated by Dapagliflozin, a clinical drug of SGLT2 inhibitors, we successfully developed a new assay for measuring glucose uptake through SGLT2. The nonradioactive microplate and microscope-based high-throughput screening assay for measuring glucose can be a new method for screening of SGLT2 inhibitors and implied for other cell assays for glucose measurement extensively.
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Affiliation(s)
- Yan-Ting Lu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiu-Li Ma
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Yu-Hui Xu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Jing Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Fang Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Wan-Ying Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Wen-Yong Xiong
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming, 650201, China.
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Wang Y, Zheng ZJ, Jia YJ, Yang YL, Xue YM. Role of p53/miR-155-5p/sirt1 loop in renal tubular injury of diabetic kidney disease. J Transl Med 2018; 16:146. [PMID: 29848325 PMCID: PMC5975703 DOI: 10.1186/s12967-018-1486-7] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 04/17/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Diabetic kidney disease is a renal microvascular disease caused by diabetes, known as one of the most serious and lethal complications of diabetes. Early renal hypertrophy is the main pathological feature, which gradually leads to the deposition of glomerular extracellular matrix and tubulointerstitial fibrosis, eventually developing irreversible structural damage to the kidneys. Autophagy is a cell self-homeostatic mechanism that is activated under stress conditions and may serve as a protective response to the survival of renal fibrogenic cells. MicroRNA (miRNA) network may be involved in the regulation of fibrosis. The purpose of this study is to assess how miRNAs regulate diabetic kidney disease and autophagy and fibrosis in renal proximal tubular cells under high glucose conditions. METHODS Human renal proximal tubular (HK-2) cells were exposed to high glucose in vitro. Bioinformatic analysis was used to select the candidate gene for potential target regulation of miR-155, Sirt1. ATG5, ATG7 is the key to autophagosome formation, regulated by Sirt1. p53 regulates miR-155 expression as a transcription factor. MiR-155 overexpression and inhibition were achieved by transfection of miR-155 mimic and inhibit to evaluate its effect on Sirt1 and autophagy and fibrosis markers. Dual luciferase reporter assays were used to confirm the direct interaction of Sirt1 with miR-155. Overexpression and inhibition of Sirt1 gene were achieved by transfection of Sirt1 plasmid and Sirt1 si to observe its effect on P53. Chip assay experiments confirmed the direct regulation of P53 on miR-155. RESULTS Under high glucose conditions, miR-155 was detected in HK-2 cells in concentration gradient, increased expression of p53 and down-regulated expression of sirt1 and autophagy-associated proteins LC3II, ATG5 and ATG7. Dual luciferase reporter assays indicate that miR-155 can target its binding to the Sirt1 3'UTR region to reduce its expression. Under high glucose conditions, over expression of miR-155 decreased the expression of LC3-II and ATG5 in HK-2 cells, while inhibition of miR-155 reversed this effect. Using chip assay testing in HK-2 cells, we demonstrated that p53 binds directly to miR-155. CONCLUSIONS The signaling axis of p53, miR-155-5p, and sirt1 in autophagic process might be a critical adapting mechanism for diabetic kidney injury.
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Affiliation(s)
- Yue Wang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong China
| | - Zong-ji Zheng
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong China
| | - Yi-jie Jia
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong China
| | - Yan-lin Yang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong China
| | - Yao-ming Xue
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong China
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Nho JH, Jung HK, Lee MJ, Jang JH, Sim MO, Jeong DE, Cho HW, Kim JC. Beneficial Effects of Cynaroside on Cisplatin-Induced Kidney Injury In Vitro and In Vivo. Toxicol Res 2018; 34:133-141. [PMID: 29686775 PMCID: PMC5903139 DOI: 10.5487/tr.2018.34.2.133] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 03/12/2018] [Accepted: 03/13/2018] [Indexed: 11/20/2022] Open
Abstract
Anti-cancer drugs such as cisplatin and doxorubicin are effectively used more than radiotherapy. Cisplatin is a chemotherapeutic drug, used for treatment of various forms of cancer. However, it has side effects such as ototoxicity and nephrotoxicity. Cisplatin-induced nephrotoxicity increases tubular damage and renal dysfunction. Consequently, we investigated the beneficial effect of cynaroside on cisplatin-induced kidney injury using HK-2 cell (human proximal tubule cell line) and an animal model. Results indicated that 10 μM cynaroside diminished cisplatin-induced apoptosis, mitochondrial dysfunction and caspase-3 activation, cisplatin-induced upregulation of caspase-3/MST-1 pathway decreased by treatment of cynaroside in HK-2 cells. To confirm the effect of cynaroside on cisplatin-induced kidney injury in vivo, we used cisplatin exposure animal model (20 mg/kg, balb/c mice, i.p., once a day for 3 days). Renal dysfunction, tubular damage and neutrophilia induced by cisplatin injection were decreased by cynaroside (10 mg/kg, i.p., once a day for 3 days). Results indicated that cynaroside decreased cisplatin-induced kidney injury in vitro and in vivo, and it could be used for improving cisplatin-induced side effects. However, further experiments are required regarding toxicity by high dose cynaroside and caspase-3/MST-1-linked signal transduction in the animal model.
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Affiliation(s)
- Jong-Hyun Nho
- National Development Institute of Korean Medicine, Jangheung, Korea
| | - Ho-Kyung Jung
- National Development Institute of Korean Medicine, Jangheung, Korea.,College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Mu-Jin Lee
- National Development Institute of Korean Medicine, Jangheung, Korea
| | - Ji-Hun Jang
- National Development Institute of Korean Medicine, Jangheung, Korea
| | - Mi-Ok Sim
- National Development Institute of Korean Medicine, Jangheung, Korea
| | - Da-Eun Jeong
- National Development Institute of Korean Medicine, Jangheung, Korea
| | - Hyun-Woo Cho
- National Development Institute of Korean Medicine, Jangheung, Korea
| | - Jong-Choon Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
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Hu XJ, Zhang YB, Zhao ZJ, Zhang L, Wang Q, Yang XW. Metabolic detoxification of bakuchiol is mediated by oxidation of CYP 450s in liver microsomes. Food Chem Toxicol 2017; 111:385-392. [PMID: 29180062 DOI: 10.1016/j.fct.2017.11.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 11/07/2017] [Accepted: 11/23/2017] [Indexed: 11/26/2022]
Abstract
Bakuchiol, one of bioactive compounds isolated from the dried ripe fruits of Psoralea corylifolia L., possesses a variety of pharmacological activities. In this study, the metabolites of bakuchiol in rat liver microsomes as well as their cytotoxicities were studied. A total of eight metabolites were isolated and identified as 14-carboxylbakuchiol (M1), 14,15-dihydroxybakuchiol (M2), 12,13-dihydroxybakuchiol (M3), 15-hydroxybakuchiol (M4), 14-hydroxybakuchiol (M5), bakuchiol hydrate (M6), 15-hydroxybakuchiol acetate (M7), and 14-hydroxybakuchiol acetate (M8). All the metabolites are new compounds except for M3. The main type of biotransformation is oxidation reaction, including hydroxylation, epoxidation and carboxylation. Cytotoxicities of bakuchiol and its metabolites against human kidney-2 (HK-2) cell line were evaluated. The median inhibition concentration (IC50) values of bakuchiol, M4, M6 and M8 were (29.48 ± 0.22) μM, (67.51 ± 6.80) μM, (90.23 ± 3.89) μM, and (86.62 ± 6.08) μM, respectively, and the IC50 values of M1, M2, M3, M5, and M7 were all in excess of 100 μM. To further verify the metabolic reliability, the metabolits of bakuchiol in vivo and the metabolic species variations in human and rat liver microsomes were studied using UPLC-MS/MS method. This study provides valuable information for further investigation of metabolism and toxicity of bakuchiol in vivo.
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Affiliation(s)
- Xiao-Jing Hu
- Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China
| | - You-Bo Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Zi-Jing Zhao
- Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China
| | - Lei Zhang
- Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China
| | - Qi Wang
- Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China; Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food Safety; Beijing 100191, China; Key Laboratory of State Administration of Traditional Chinese Medicine (TCM) for Compatibility Toxicology, Beijing 100191, China.
| | - Xiu-Wei Yang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
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Vaara M, Vaara T, Tyrrell JM. Structure-activity studies on polymyxin derivatives carrying three positive charges only reveal a new class of compounds with strong antibacterial activity. Peptides 2017; 91:8-12. [PMID: 28300674 DOI: 10.1016/j.peptides.2017.03.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 03/06/2017] [Accepted: 03/07/2017] [Indexed: 11/23/2022]
Abstract
Recent years have brought in an increased interest to develop improved polymyxins. The currently used polymyxins, i.e. polymyxin B and colistin (polymyxin E) are pentacationic lipopeptides that possess a cyclic heptapeptide part with three positive charges, a linear "panhandle" part with two positive charges, and a fatty acyl tail. Unfortunately, their clinical use is shadowed by their notable nephrotoxicity. We have previously developed a polymyxin derivative NAB739 which lacks the positive charges in the linear part. This derivative is better tolerated than polymyxin B in cynomolgus monkeys and is, in contrast to polymyxin B, excreted into urine in monkeys and rats. Here we have conducted further structure-activity relationship (SAR) studies on 17 derivatives with three positive charges only. We discovered a remarkably antibacterial class, as exemplified by NAB815, that carries two positive charges only in the cyclic part.
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Affiliation(s)
- Martti Vaara
- Northern Antibiotics Ltd., FI-02150 Espoo, Finland; Division of Clinical Microbiology, Helsinki University Hospital, FI-00029 Helsinki, Finland; Department of Bacteriology and Immunology, Helsinki University Medical School, FI-00014 Helsinki, Finland.
| | - Timo Vaara
- Northern Antibiotics Ltd., FI-02150 Espoo, Finland
| | - Jonathan M Tyrrell
- Department of Medical Microbiology & Infectious Disease, Institute of Infection & Immunity, UGW Main Building, Heath Park Campus, Cardiff, Wales, UK
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Abstract
Ischemia-reperfusion (I/R) injury remains the primary contributor to delayed graft function in kidney transplantation. The beneficial application of manganese superoxide dismutase (sod), delivered by a BacMam vector, against renal I/R injury has not been evaluated previously. Therefore, this study overexpressed sod-2 in proximal tubular epithelial (HK-2) cells and porcine kidney organs during simulated renal I/R injury. Incubation of HK-2 cells with antimycin A and 2-deoxyglucose resulted in a significant decrease in intracellular adenosine triphosphate (ATP) levels; following reperfusion, ATP levels significantly increased over time in cells overexpressing sod-2. In addition, lactate dehydrogenase (LDH) release declined over 72 h in BacMam-transduced injured cells. Ex vivo delivery of sod-2 significantly increased ATP levels in organs after 24 h of cold perfusion. In vitro and ex vivo results suggested that BacMam transduction successfully delivered sod-2, which reduced injury associated with I/R, by improving ATP cell content and decreasing LDH release with a subsequent increase in kidney tissue viability. These data provide further evidence for the potential application of BacMam as a gene delivery system for attenuating injury after cold preservation.
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Affiliation(s)
- Elisabetta Hitchman
- 1 Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University , Oxford, United Kingdom
| | - Richard B Hitchman
- 2 Oxford Expression Technologies Ltd. , BioInnovation Hub, Oxford, United Kingdom
| | - Linda A King
- 1 Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University , Oxford, United Kingdom
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Shah H, Patel M, Shrivastava N. Gene expression study of phase I and II metabolizing enzymes in RPTEC/TERT1 cell line: application in in vitro nephrotoxicity prediction. Xenobiotica 2016; 47:837-843. [PMID: 27616666 DOI: 10.1080/00498254.2016.1236299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
1. The phase I and II metabolizing enzymes of kidneys play an important role in the metabolism of xenobiotic as well as endogenous compounds and proximal tubules of kidney constitute high concentration of these metabolizing enzymes compared with the other parts. 2. It has been shown previously that differential enzyme expression among human and rodent/non-rodent species can be a roadblock in drug discovery and development process. Currently, proximal tubule cell lines of human origin such as RPTEC/TERT1 and HK-2 are used to understand the pathophysiology of kidney diseases, therapeutic efficacy of drugs, and nephrotoxicity of compounds. 3. The purpose of the present study is to understand the metabolic enzymes present in RPTEC/TERT1 and HK-2 cell lines that would help to interpret and predict probable in vitro behavior of the molecule being tested. 4. We analyzed the expression of phase I and II metabolizing enzymes of RPTEC/TERT1 and HK-2 cell lines. We found equal expression of CYP1B1, 2J2, 3A4, 3A5, UGT1A9, SULT2A1 and GSTA, higher expression of 2B6, 2D6, 4A11, 4F2, 4F8, 4F11, UGT2B7, SULT1E1 in RPTEC/TERT1 and absence of GSTT in RPTEC/TERT1 compared to HK-2 at mRNA level. Such differences can affect the outcome of in vitro nephrotoxicity prediction.
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Affiliation(s)
- Heta Shah
- a Department of Biotechnology , National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad , Ahmedabad , Gujarat , India and
| | - Manish Patel
- a Department of Biotechnology , National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad , Ahmedabad , Gujarat , India and
| | - Neeta Shrivastava
- a Department of Biotechnology , National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad , Ahmedabad , Gujarat , India and.,b Department of Pharmacognosy and Phytochemistry , B. V. Patel Pharmaceutical Education and Research Development (PERD) Center , Ahmedabad , Gujarat , India
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Montford JR, Lehman AMB, Scobey MS, Weiser-Evans MCM, Nemenoff RA, Furgeson SB. Cytosolic phospholipase A 2α increases proliferation and de-differentiation of human renal tubular epithelial cells. Prostaglandins Other Lipid Mediat 2016; 126:1-8. [PMID: 27554058 DOI: 10.1016/j.prostaglandins.2016.08.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 07/14/2016] [Accepted: 08/19/2016] [Indexed: 01/03/2023]
Abstract
The group IVA calcium-dependent cytosolic phospholipase A2 (cPLA2α) enzyme controls the release of arachidonic acid from membrane bound phospholipids and is the rate-limiting step in production of eicosanoids. A variety of different kidney injuries activate cPLA2α, therefore we hypothesized that cPLA2α activity would regulate pathologic processes in HK-2 cells, a human renal tubular epithelial cell line, by regulating cell phenotype and proliferation. In two lentiviral cPLA2α-silenced knockdowns, we observed decreased proliferation and increased apoptosis compared to control HK-2 cells. cPLA2α-silenced cells also demonstrated an altered morphology, had increased expression E-cadherin, and decreased expression of Ncadherin. Increased levels of E-cadherin were associated with increased promoter activity and decreased levels of SNAIL1, SNAIL2, and ZEB1, transcriptional repressors of E-cadherin expression. Addition of exogenous arachidonic acid, but not PGE2, reversed the phenotypic changes in cPLA2α-silenced cells. These data suggest that cPLA2α may play a key role in renal repair after injury through a PGE2-independent mechanism.
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Affiliation(s)
- John R Montford
- Division of Renal Diseases and Hypertension, Department of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, CO, United States.
| | - Allison M B Lehman
- Division of Renal Diseases and Hypertension, Department of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, CO, United States
| | - Micah S Scobey
- Division of Renal Diseases and Hypertension, Department of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, CO, United States
| | - Mary C M Weiser-Evans
- Division of Renal Diseases and Hypertension, Department of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, CO, United States
| | - Raphael A Nemenoff
- Division of Renal Diseases and Hypertension, Department of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, CO, United States
| | - Seth B Furgeson
- Division of Renal Diseases and Hypertension, Department of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, CO, United States; Denver Health and Hospitals, Denver, CO, United States
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Zeng FC, Zeng MQ, Huang L, Li YL, Gao BM, Chen JJ, Xue RZ, Tang ZY. Downregulation of VEGFA inhibits proliferation, promotes apoptosis, and suppresses migration and invasion of renal clear cell carcinoma. Onco Targets Ther 2016; 9:2131-41. [PMID: 27110129 PMCID: PMC4835130 DOI: 10.2147/ott.s98002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Objective The aim of this study was to investigate the effects of vascular endothelial growth factor A (VEGFA) on cell proliferation, apoptosis, migration, and invasion in renal clear cell carcinoma (RCCC). Methods Between June 2012 and June 2015, RCCC tissues were obtained for the experimental group, and RCCC adjacent tumor-free kidney parenchyma tissues were obtained for the control group. VEGFA mRNA and protein expressions and phosphoinositide 3-kinase, serine/threonine-specific protein kinase (AKT), and phosphorylated-AKT protein expressions were detected. The chemically synthesized specific siRNA using RNA interference technology was used to inhibit VEGFA gene expression in human RCCC 786-O cells. The negative control (NC) group was transfected with NC sequence, and the blank group was transfected with no sequence. Flow cytometry, scratch test, and cell-penetrating experiment were used to detect cell proliferation, apoptosis, migration, and invasion of 786-O cells. Results Positive expression of VEGFA protein was 60.62% in RCCC tissue and 18.34% in adjacent tissue with statistically significant difference (P<0.001). VEGFA protein and mRNA expressions were higher in RCCC tissue than those in adjacent tissue (both P<0.01). VEGF expression in RCCC tissue was associated with Fuhrman grading and American Joint Committee on Cancer staging (both P<0.05). After RCCC 786-O cells transfecting the VEGFA siRNA, the VEGFA mRNA and protein expressions and phosphoinositide 3-kinase and phosphorylated-AKT protein expressions were significantly decreased, cell proliferation was remarkably inhibited, cell apoptotic ratio was obviously increased, and migration distance and invasive cell number were markedly decreased compared to those in the NC group and the blank group (all P<0.05). Conclusion Inhibition of VEGFA inhibited proliferation, promoted apoptosis, and suppressed migration and invasion of RCCC 786-O cells. VEGF has a potential role in diagnosis and therapy of RCCC.
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Affiliation(s)
- Fan-Chang Zeng
- Department of Urology, Xiangya Hospital, Central South University, Changsha, People's Republic of China; Department of Urology, Hainan General Hospital, Haikou, People's Republic of China
| | - Ming-Qiang Zeng
- Department of Urology, Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Liang Huang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Yong-Lin Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Ben-Min Gao
- Department of Urology, Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Jun-Jie Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Rui-Zhi Xue
- Department of Urology, Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Zheng-Yan Tang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, People's Republic of China
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Mossoba ME, Flynn TJ, Vohra S, Wiesenfeld PL, Sprando RL. Human kidney proximal tubule cells are vulnerable to the effects of Rauwolfia serpentina. Cell Biol Toxicol 2016; 31:285-93. [PMID: 26838987 DOI: 10.1007/s10565-016-9311-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 01/15/2016] [Indexed: 11/25/2022]
Abstract
Rauwolfia serpentina (or Snake root plant) is a botanical dietary supplement marketed in the USA for maintaining blood pressure. Very few studies have addressed the safety of this herb, despite its wide availability to consumers. Its reported pleiotropic effects underscore the necessity for evaluating its safety. We used a human kidney cell line to investigate the possible negative effects of R. serpentina on the renal system in vitro, with a specific focus on the renal proximal tubules. We evaluated cellular and mitochondrial toxicity, along with a variety of other kidney-specific toxicology biomarkers. We found that R. serpentina was capable of producing highly detrimental effects in our in vitro renal cell system. These results suggest more studies are needed to investigate the safety of this dietary supplement in both kidney and other target organ systems.
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Affiliation(s)
- Miriam E Mossoba
- Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and in vitro Toxicology Branch (NIVTB), U.S. Food and Drug Administration (US FDA), 8301 Muirkirk Rd., Laurel, MD, 20708, USA.
- MOD-1 Laboratories, US FDA, 8301 Muirkirk Rd., HFS-025, Lab 1406, Laurel, MD, 20708, USA.
| | - Thomas J Flynn
- Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and in vitro Toxicology Branch (NIVTB), U.S. Food and Drug Administration (US FDA), 8301 Muirkirk Rd., Laurel, MD, 20708, USA
| | - Sanah Vohra
- Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and in vitro Toxicology Branch (NIVTB), U.S. Food and Drug Administration (US FDA), 8301 Muirkirk Rd., Laurel, MD, 20708, USA
| | - Paddy L Wiesenfeld
- Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and in vitro Toxicology Branch (NIVTB), U.S. Food and Drug Administration (US FDA), 8301 Muirkirk Rd., Laurel, MD, 20708, USA
| | - Robert L Sprando
- Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and in vitro Toxicology Branch (NIVTB), U.S. Food and Drug Administration (US FDA), 8301 Muirkirk Rd., Laurel, MD, 20708, USA
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Mossoba ME, Flynn TJ, Vohra SN, Wiesenfeld PL, Sprando RL. In vitro exposure of Adhatoda zeylanica to human renal cells lacks acute toxicity. Toxicol Rep 2015; 3:15-20. [PMID: 28959522 PMCID: PMC5615422 DOI: 10.1016/j.toxrep.2015.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 10/25/2015] [Accepted: 11/12/2015] [Indexed: 11/17/2022] Open
Abstract
Adhatoda zeylanica is a dietary supplement ingredient present in several types of dietary supplements, including weight loss, respiratory relief, and immune regulating products. Due to its reported wide range of uses in folk medicine, it was hypothesized that it may have the potential to target multiple organs and lead to a range of toxicity features. As a preliminary evaluation of the safety of this herbal ingredient, an investigation into its effects on the kidney was sought. An in vitro study of its potential nephrotoxicity using the HK-2 human proximal tubule cell line in a variety of functional indicators was performed to capture both general forms of cellular toxicity as well as ones that are specific to proximal tubules. A. zeylanica was only capable of inducing detrimental short-term toxicity to HK-2 cells at relatively high treatment concentrations when exposed directly to the cells. The lack of acute and potent toxicity of A. zeylanica under our experimental conditions calls for further studies to better define its toxicant threshold and establish safe dosage levels.
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Affiliation(s)
- Miriam E Mossoba
- U.S Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and In vitro Toxicology Branch (NIVTB), 8301 Muirkirk Rd., Laurel, MD 20708, United States
| | - Thomas J Flynn
- U.S Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and In vitro Toxicology Branch (NIVTB), 8301 Muirkirk Rd., Laurel, MD 20708, United States
| | - Sanah N Vohra
- U.S Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and In vitro Toxicology Branch (NIVTB), 8301 Muirkirk Rd., Laurel, MD 20708, United States
| | - Paddy L Wiesenfeld
- U.S Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and In vitro Toxicology Branch (NIVTB), 8301 Muirkirk Rd., Laurel, MD 20708, United States
| | - Robert L Sprando
- U.S Food and Drug Administration (U.S. FDA), Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), Division of Toxicology (DOT), Neurotoxicology and In vitro Toxicology Branch (NIVTB), 8301 Muirkirk Rd., Laurel, MD 20708, United States
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Zhou L, Xu DY, Sha WG, Shen L, Lu GY, Yin X. Long non-coding MIAT mediates high glucose-induced renal tubular epithelial injury. Biochem Biophys Res Commun 2015; 468:726-32. [PMID: 26551455 DOI: 10.1016/j.bbrc.2015.11.023] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 11/03/2015] [Indexed: 12/22/2022]
Abstract
BACKGROUND AND OBJECTIVE Long non-coding RNAs (lncRNAs) constitute a novel class of non-coding RNAs that take part in occurrence and development of diabetes complication via regulating gene expression. However, litter is known about lncRNAs in the setting of diabetes induced nephropathy. The aim of this study was to examine whether lncRNA-myocardial infarction-associated transcript (MIAT) is involved in diabetes induced renal tubules injury. METHODS Adult Wister rats were randomly assigned to receive intraperitoneal STZ (65 mg/kg) to induce diabetes. Rats treated with equal volume of citrate buffer were as control. Renal function was evaluated by analysis of serum creatinine and blood urea nitrogen (BUN) every four weeks after STZ administration. Also tubules of all rats were collected for determination of MIAT and Nrf2 level at the corresponding phase. The in vitro high glucose-triggered human renal tubular epithelial cell line (HK-2) was used to explore the mechanism underling MIAT regulated high glucose-induced tubular damage. RESULTS In diabetic rats, MIAT showed the lower level and its expression is negatively correlated with serum creatinine and BUN. Consistent with diabetic rat, exposed to high glucose, HK-2 cells expressed lower level of MIAT and Nrf2, and also showed reduction in cell viability. By pcDNA-MIAT plasmid transfection, we observed that MIAT overexpression reversed inhibitory action of Nrf2 expression by high glucose. Moreover, the data of RNA pull-down and RIP showed that MIAT controlled Nrf2 cellular through enhancing Nrf2 stability, which was confirmed by CHX and MG132 administration. Inhibitory effect of cell viability by silencing MIAT was also reversed by Nrf2 overexpression. CONCLUSION In summary, our data suggested that MIAT/Nrf2 served as an important signaling pathway for high glucose induced renal tubular epithelial injury.
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Affiliation(s)
- Ling Zhou
- Department of Nephrology, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - De-yu Xu
- Department of Nephrology, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - Wen-gang Sha
- Department of Nephrology, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - Lei Shen
- Department of Nephrology, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - Guo-yuan Lu
- Department of Nephrology, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China.
| | - Xia Yin
- Department of Endocrinology, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
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Abstract
The kidney is an important site of xenobiotic-induced toxicity. Because the traditional markers of renal injury indicate only severe renal damage, new biomarkers are needed for a more sensitive and reliable evaluation of renal toxicity. This study was designed to identify in vitro noninvasive biomarkers for efficient assessment of nephrotoxicity by using cisplatin as a model of nephrotoxic compounds. To this end, a comparative proteomic analysis of conditioned media from HK-2 human kidney epithelial cells treated with cisplatin was performed. Here, we identified pyruvate kinase M1/M2 isoform M2 (PKM2) and eukaryotic translation elongation factor 1 gamma (EF-1γ) as potential biomarker candidates for evaluation of nephrotoxicity. PKM2 and EF-1γ were increased by cisplatin in a kidney cell-specific manner, most likely due to cisplatin-induced apoptosis. The increase of PKM2 and EF-1γ levels in conditioned media was also observed in the presence of other nephrotoxic agents with different cytotoxic mechanisms such as CdCl2, HgCl2, and cyclosporine A. Rats treated with cisplatin, CdCl2, or HgCl2 presented increased levels of PKM2 and EF-1γ in the urine and kidney tissue. Taken together, this study identified two noninvasive biomarker candidates, PKM2 and EF-1γ, by comparative proteomic analysis. These new biomarkers may offer an alternative to traditional renal markers for efficient evaluation of nephrotoxicity.
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Affiliation(s)
- Sun Young Kim
- College of Pharmacy, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - So-Jung Sohn
- College of Pharmacy, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - A Jin Won
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Hyung Sik Kim
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Aree Moon
- College of Pharmacy, Duksung Women's University, Seoul 132-714, Republic of Korea
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