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Lu H, Li Y, Zhang T, Liu M, Chi Y, Liu S, Shi Y. Salidroside Reduces High-Glucose-Induced Podocyte Apoptosis and Oxidative Stress via Upregulating Heme Oxygenase-1 (HO-1) Expression. Med Sci Monit 2017; 23:4067-4076. [PMID: 28831032 PMCID: PMC5580518 DOI: 10.12659/msm.902806] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background Hyperglycemia is one of the most dangerous factors causing diabetic nephropathy. Salidroside is considered to have the effects of reducing oxidative stress damage and improving cell viability. This study was performed to investigate whether and how salidroside reduces high-glucose (HG)-induced apoptosis in mouse podocytes. Material/Methods We examined whether salidroside could decrease HG-induced podocyte oxidative stress and podocyte apoptosis in vitro. The potential signaling pathways were also investigated. Podocytes (immortalized mouse epithelial cells) were treated with normal glucose (5.5 mM) as control or HG (30 mM), and then exposed to salidroside treatment. Results HG enhanced the generation of intracellular reactive oxygen species (ROS) and apoptosis in podocytes. Salidroside reduced HG-induced apoptosis-related consequences via promoting HO-1 expression. Salidroside increased the expression level of phosphorylated Akt (p-Akt) and phosphorylated ILK (p-ILK), p-JNK, and p-ERK and localization of Nrf-2. JNK inhibitor and ILK inhibitor decreased HO-1 expression to different degrees. Moreover, specific siRNAs of ILK, Nrf-2, and HO-1, and inhibitors of HO-1 and ILK significantly increased ROS generation and Caspase9/3 expression in the presence of salidroside and HG. Conclusions The results suggest that salidroside reduces HG-induced ROS generation and apoptosis and improves podocytes viability by upregulating HO-1 expression. ILK/Akt, JNK, ERK1/2, p38 MAPK, and Nrf-2 are involved in salidroside-decreased podocyte apoptosis in HG condition.
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Affiliation(s)
- Hua Lu
- Department of Nephrology, The 3rd Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (mainland).,Key Laboratory of Kidney Diseases of Hebei Province, Shijiazhuang, Hebei, China (mainland)
| | - Ying Li
- Department of Nephrology, The 3rd Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (mainland).,Key Laboratory of Kidney Diseases of Hebei Province, Shijiazhuang, Hebei, China (mainland)
| | - Tao Zhang
- Department of Nephrology, The 3rd Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (mainland).,Key Laboratory of Kidney Diseases of Hebei Province, Shijiazhuang, Hebei, China (mainland)
| | - Maodong Liu
- Department of Nephrology, The 3rd Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (mainland).,Key Laboratory of Kidney Diseases of Hebei Province, Shijiazhuang, Hebei, China (mainland)
| | - Yanqing Chi
- Department of Nephrology, The 3rd Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (mainland).,Key Laboratory of Kidney Diseases of Hebei Province, Shijiazhuang, Hebei, China (mainland)
| | - Shuxia Liu
- Key Laboratory of Kidney Diseases of Hebei Province, Shijiazhuang, Hebei, China (mainland).,Department of Pathology, Hebei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Yonghong Shi
- Key Laboratory of Kidney Diseases of Hebei Province, Shijiazhuang, Hebei, China (mainland).,Department of Pathology, Hebei Medical University, Shijiazhuang, Hebei, China (mainland)
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Ooi TC, Chan KM, Sharif R. Zinc L-carnosine suppresses inflammatory responses in lipopolysaccharide-induced RAW 264.7 murine macrophages cell line via activation of Nrf2/HO-1 signaling pathway. Immunopharmacol Immunotoxicol 2017; 39:259-267. [DOI: 10.1080/08923973.2017.1344987] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Theng Choon Ooi
- Biomedical Science Programme, School of Diagnostic and Applied Health Sciences, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Kok Meng Chan
- Environmental Health and Industrial Safety Programme, School of Diagnostic and Applied Health Sciences, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Razinah Sharif
- Programme of Nutritional Sciences, School of Healthcare Sciences, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Yang TC, Wu PC, Chung IF, Jiang JH, Fann MJ, Kao LS. Cell death caused by the synergistic effects of zinc and dopamine is mediated by a stress sensor gene Gadd45b - implication in the pathogenesis of Parkinson's disease. J Neurochem 2016; 139:120-33. [PMID: 27385273 DOI: 10.1111/jnc.13728] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 07/01/2016] [Accepted: 07/03/2016] [Indexed: 11/30/2022]
Abstract
The pathogenesis of Parkinson's disease (PD) is not completely understood, Zinc (Zn(2+) ) and dopamine (DA) have been shown to involve in the degeneration of dopaminergic cells. By microarray analysis, we identified Gadd45b as a candidate molecule that mediates Zn(2+) and DA-induced cell death; the mRNA and protein levels of Gadd45b are increased by Zn(2+) treatment and raised to an even higher level by Zn(2+) plus DA treatment. Zn(2+) plus DA treatment-induced PC12 cell death was enhanced when there was over-expression of Gadd45b and was decreased by knock down of Gadd45b. MAPK p38 and JNK signaling was able to cross-talk with Gadd45b during Zn(2+) and DA treatment. The synergistic effects of Zn(2+) and DA on PC12 cell death can be accounted for by an activation of the Gadd45b-induced cell death pathway and an inhibition of p38/JNK survival pathway. Furthermore, the in vivo results show that the levels of Gadd45b protein expression and phosphorylation of p38 were increased in the substantia nigra by the infusion of Zn(2+) /DA in the mouse brain and the level of Gadd45b mRNA is significantly higher in the substantia nigra of male PD patients than normal controls. The novel role of Gadd45b and its interactions with JNK and p38 will help our understanding of the pathogenesis of PD and help the development of future treatments for PD. Zinc and dopamine are implicated in the degeneration of dopaminergic neurons. We previously demonstrated that zinc and dopamine induced synergistic effects on PC12 cell death. Results from this study show that these synergistic effects can be accounted for by activation of the Gadd45b-induced cell death pathway and inhibition of the p38/JNK survival pathway. We provide in vitro and in vivo evidence to support a novel role for Gadd45b in the pathogenesis of Parkinson's disease.
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Affiliation(s)
- Tien-Chun Yang
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Pei-Chun Wu
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
| | - I-Fang Chung
- Institute of Biomedical Informatics, National Yang-Ming University, Taipei, Taiwan
| | - Jhih-Hang Jiang
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Ming-Ji Fann
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Lung-Sen Kao
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan. .,Brain Research Center, National Yang-Ming University, Taipei, Taiwan.
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