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Duara J, Torres M, Gurumani M, Molina David J, Njeim R, Kim JJ, Mitrofanova A, Ge M, Sloan A, Müller-Deile J, Schiffer M, Merscher S, Fornoni A. Oxysterol-binding protein-like 7 deficiency leads to ER stress-mediated apoptosis in podocytes and proteinuria. Am J Physiol Renal Physiol 2024; 327:F340-F350. [PMID: 38961844 DOI: 10.1152/ajprenal.00319.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 06/21/2024] [Accepted: 06/21/2024] [Indexed: 07/05/2024] Open
Abstract
Chronic kidney disease (CKD) is associated with renal lipid dysmetabolism among a variety of other pathways. We recently demonstrated that oxysterol-binding protein-like 7 (OSBPL7) modulates the expression and function of ATP-binding cassette subfamily A member 1 (ABCA1) in podocytes, a specialized type of cell essential for kidney filtration. Drugs that target OSBPL7 lead to improved renal outcomes in several experimental models of CKD. However, the role of OSBPL7 in podocyte injury remains unclear. Using mouse models and cellular assays, we investigated the influence of OSBPL7 deficiency on podocytes. We demonstrated that reduced renal OSBPL7 levels as observed in two different models of experimental CKD are linked to increased podocyte apoptosis, primarily mediated by heightened endoplasmic reticulum (ER) stress. Although as expected, the absence of OSBPL7 also resulted in lipid dysregulation (increased lipid droplets and triglycerides content), OSBPL7 deficiency-related lipid dysmetabolism did not contribute to podocyte injury. Similarly, we demonstrated that the decreased autophagic flux we observed in OSBPL7-deficient podocytes was not the mechanistic link between OSBPL7 deficiency and apoptosis. In a complementary zebrafish model, osbpl7 knockdown was sufficient to induce proteinuria and morphological damage to the glomerulus, underscoring its physiological relevance. Our study sheds new light on the mechanistic link between OSBPL7 deficiency and podocyte injury in glomerular diseases associated with CKD, and it strengthens the role of OSBPL7 as a novel therapeutic target.NEW & NOTEWORTHY OSBPL7 and ER stress comprise a central mechanism in glomerular injury. This study highlights a crucial link between OSBPL7 deficiency and ER stress in CKD. OSBPL7 deficiency causes ER stress, leading to podocyte apoptosis. There is a selective effect on lipid homeostasis in that OSBPL7 deficiency affects lipid homeostasis, altering cellular triglyceride but not cholesterol content. The interaction of ER stress and apoptosis supports that ER stress, not reduced autophagy, is the main driver of apoptosis in OSBPL7-deficient podocytes.
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Affiliation(s)
- Joanne Duara
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Department of Pediatrics/Division of Neonatology, Batchelor Children's Research Institute, Holtz Children's Hospital, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Maria Torres
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Boston University, Boston, Massachusetts, United States
| | - Margaret Gurumani
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Boston University, Boston, Massachusetts, United States
| | - Judith Molina David
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Rachel Njeim
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Jin-Ju Kim
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Alla Mitrofanova
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Mengyuan Ge
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Alexis Sloan
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Janina Müller-Deile
- Department of Nephrology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Mario Schiffer
- Department of Nephrology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Mount Desert Island Biological Laboratories, Salisbury Cove, Maine, United States
| | - Sandra Merscher
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Alessia Fornoni
- Peggy and Harold Katz Family Drug Discovery Center, University of Miami Miller School of Medicine, Miami, Florida, United States
- Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States
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Li N, Xu J, Yan X, Liu Q, Zhang M. TROP2 promotes the proliferation of triple-negative breast cancer cells via calcium ion-dependent ER stress signaling pathway. Cell Biochem Biophys 2024:10.1007/s12013-024-01327-4. [PMID: 38816653 DOI: 10.1007/s12013-024-01327-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/17/2024] [Indexed: 06/01/2024]
Abstract
OBJECTIVE To explore the molecular mechanisms of tumor-associated calcium signal transduction factor 2 (TROP2) affecting the occurrence and development of triple-negative breast cancer (TNBC). METHODS The TCGA database, immunohistochemical staining, and qRT-PCR were used to analyze the expression of TROP2 in TNBC tissues and cells. The protein expressions of TROP2 and inositol 1,4,5-trisphosphate receptor (IP3R) after TROP2 knockdown were detected by western blot (WB). Cell proliferation was detected by CCK8 and colony formation assay, Annexin V-APC/PI flow cytometry was used to detect apoptosis, and intracellular calcium ion (Ca2+) was detected by flow cytometry with Fura 2-AM fluorescent probe. Finally, the morphological changes of the endoplasmic reticulum (ER) were observed by transmission electron microscopy, and the expression of ER stress (ERS)-related proteins was detected by WB and immunofluorescence staining. RESULTS TROP2 was up-regulated in TNBC tumor tissues and cells. Silencing TROP2 decreased the proliferation rate and clone formation number, and increased the apoptosis rate and the Ca2+ level in TNBC cells. These phenomena were reversed after the addition of 2-APB. In addition, after TROP2 knockdown, the expressions of IP3R and ERS-related proteins were up-regulated, the ER was cystic dilated, and ERS was activated. And the addition of 2-APB significantly inhibited the activation of ERS induced by TROP2 knockdown. CONCLUSION TROP2 regulated the proliferation and apoptosis of TNBC cells through a Ca2+-dependent ERS signaling pathway.
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Affiliation(s)
- Ning Li
- Department of Breast Surgery, Changzhi People's Hospital, Changzhi, 046000, China
| | - Jianzhong Xu
- Department of Breast Surgery, Changzhi People's Hospital, Changzhi, 046000, China
| | - Xi Yan
- Department of Pharmacy, Changzhi People's Hospital, Changzhi, 046000, China
| | - Qing Liu
- Department of Emergency, Changzhi People's Hospital, Changzhi, 046000, China
| | - Mingqi Zhang
- Department of Breast Surgery, Changzhi People's Hospital, Changzhi, 046000, China.
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Zeng S, Wang Y, Ai L, Huang L, Liu Z, He C, Bai Q, Li Y. Chronic intermittent hypoxia-induced oxidative stress activates TRB3 and phosphorylated JNK to mediate insulin resistance and cell apoptosis in the pancreas. Clin Exp Pharmacol Physiol 2024; 51:e13843. [PMID: 38302075 DOI: 10.1111/1440-1681.13843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 02/03/2024]
Abstract
This study explores the potential mechanisms of obstructive sleep apnoea (OSA) complicates type 2 diabetes mellitus (T2DM) by which chronic intermittent hypoxia (CIH) induces insulin resistance and cell apoptosis in the pancreas through oxidative stress. Four- and eight-week CIH rat models were established, and Tempol (100 mg/kg/d), was used as an oxidative stress inhibitor. This study included five groups: 4-week CIH, 4-week CIH-Tempol, 8-week CIH, 8-week CIH-Tempol and normal control (NC) groups. Fasting blood glucose and insulin levels were measured in the serum. The expression levels of 8-hidroxy-2-deoxyguanosine (8-OHdG), tribbles homologue 3 (TRB3), c-Jun N-terminal kinase (JNK), phosphorylated JNK (p-JNK), insulin receptor substrate-1 (IRS-1), phosphorylated IRS-1 (Ser307) (p-IRS-1ser307 ), protein kinase B (AKT), phosphorylated AKT (Ser473) (p-AKTser473 ), B cell lymphoma protein-2 (Bcl-2), cleaved-caspase-3 (Cl-caspase-3), and the islet cell apoptosis were detected in the pancreas. CIH induced oxidative stress in the pancreas. Compared with that in the NC group and CIH-Tempol groups individually, the homeostasis model assessment of insulin resistance (HOMA-IR) and apoptosis of islet cells was increased in the CIH groups. CIH-induced oxidative stress increased the expression of p-IRS-1Ser307 and decreased the expression of p-AKTSer473 . The expression levels of TRB3 and p-JNK were higher in the CIH groups than in both the CIH-Tempol and NC groups. Meanwhile, the expressions of Cl-caspase-3 and Bcl-2 were upregulated and downregulated, respectively, in the CIH groups. Hence, the present study demonstrated that CIH-induced oxidative stress might not only induce insulin resistance but also islet cell apoptosis in the pancreas through TRB3 and p-JNK.
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Affiliation(s)
- Shan Zeng
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yeying Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Kunming Medical University, Kunming, China
| | - Li Ai
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Liwei Huang
- Department of Epidemiology and Biostatistics, School of Public Health, Kunming Medical University, Kunming, China
| | - Zhijuan Liu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Chunxia He
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Qiaohui Bai
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yongxia Li
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
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Lu G, Li J, Gao T, Liu Q, Chen O, Zhang X, Xiao M, Guo Y, Wang J, Tang Y, Gu J. Integration of dietary nutrition and TRIB3 action into diabetes mellitus. Nutr Rev 2024; 82:361-373. [PMID: 37226405 PMCID: PMC10859691 DOI: 10.1093/nutrit/nuad056] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
Despite intensive studies for decades, the common mechanistic correlations among the underlying pathology of diabetes mellitus (DM), its complications, and effective clinical treatments remain poorly characterized. High-quality diets and nutrition therapy have played an indispensable role in the management of DM. More importantly, tribbles homolog 3 (TRIB3), a nutrient-sensing and glucose-responsive regulator, might be an important stress-regulatory switch, linking glucose homeostasis and insulin resistance. Therefore, this review aimed to introduce the latest research progress on the crosstalk between dietary nutrition intervention and TRIB3 in the development and treatment of DM. This study also summarized the possible mechanisms involved in the signaling pathways of TRIB3 action in DM, in order to gain an in-depth understanding of dietary nutrition intervention and TRIB3 in the pathogenesis of DM at the organism level.
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Affiliation(s)
- Guangping Lu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jiahao Li
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ting Gao
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qingbo Liu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ou Chen
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiaohui Zhang
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Mengjie Xiao
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yuanfang Guo
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jie Wang
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yufeng Tang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Junlian Gu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China
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Khamis T, Abdelkhalek A, Abdellatif H, Dwidar N, Said A, Ahmed R, Wagdy K, Elgarhy R, Eltahan R, Mohamed H, Said Amer E, Hanna M, Ragab T, Kishk A, Wael J, Sarhan E, Saweres L, Reda M, Elkomy S, Mohamed A, Samy A, Khafaga A, Shaker Y, Yehia H, Alanazi A, Alassiri M, Tîrziu E, Bucur IM, Arisha AH. BM-MSCs alleviate diabetic nephropathy in male rats by regulating ER stress, oxidative stress, inflammation, and apoptotic pathways. Front Pharmacol 2023; 14:1265230. [PMID: 38044936 PMCID: PMC10690373 DOI: 10.3389/fphar.2023.1265230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 10/12/2023] [Indexed: 12/05/2023] Open
Abstract
Introduction: Diabetic nephropathy (DN), a chronic kidney disease, is a major cause of end-stage kidney disease worldwide. Mesenchymal stem cells (MSCs) have become a promising option to mitigate several diabetic complications. Methods: In this study, we evaluated the therapeutic potential of bone marrow-derived mesenchymal stem cells (BM-MSCs) in a rat model of STZ-induced DN. After the confirmation of diabetes, rats were treated with BM-MSCs and sacrificed at week 12 after treatment. Results: Our results showed that STZ-induced DN rats had extensive histopathological changes, significant upregulation in mRNA expression of renal apoptotic markers, ER stress markers, inflammatory markers, fibronectin, and intermediate filament proteins, and reduction of positive immunostaining of PCNA and elevated P53 in kidney tissue compared to the control group. BM-MSC therapy significantly improved renal histopathological changes, reduced renal apoptosis, ER stress, inflammation, and intermediate filament proteins, as well as increased positive immunostaining of PCNA and reduced P53 in renal tissue compared to the STZ-induced DN group. Conclusion: In conclusion, our study indicates that BM-MSCs may have therapeutic potential for the treatment of DN and provide important insights into their potential use as a novel therapeutic approach for DN.
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Affiliation(s)
- Tarek Khamis
- Department of Pharmacology and Laboratory of Biotechnology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Adel Abdelkhalek
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Hussein Abdellatif
- Department of Human and Clinical Anatomy, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Oman
- Anatomy and Embryology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Nourelden Dwidar
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Ahmed Said
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Rama Ahmed
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Kerolos Wagdy
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Rowina Elgarhy
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Rawan Eltahan
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Hisham Mohamed
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Eman Said Amer
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Maria Hanna
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Tarek Ragab
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Abdallah Kishk
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Judy Wael
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Eyad Sarhan
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Linda Saweres
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Mohamed Reda
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Sara Elkomy
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Abdalah Mohamed
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Abdullah Samy
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Ateya Khafaga
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Youliana Shaker
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Hamdy Yehia
- Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
| | - Asma Alanazi
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences (KSAU-HS), Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
| | - Mohammed Alassiri
- King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
- Department of Basic Sciences, College of Science and Health Professions, King Saud Bin Abdulaziz University for Health Sciences (KSAU-HS), Riyadh, Saudi Arabia
- Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City (KAMC), Ministry of the National Guard—Health Affairs, Riyadh, Saudi Arabia
| | - Emil Tîrziu
- Department of Animal Production and Veterinary Public Health, Faculty of Veterinary Medicine, University of Life Sciences, “King Mihai I” from Timisoara [ULST], Timisoara, Romania
| | - Iulia Maria Bucur
- Department of Animal Production and Veterinary Public Health, Faculty of Veterinary Medicine, University of Life Sciences, “King Mihai I” from Timisoara [ULST], Timisoara, Romania
| | - Ahmed Hamed Arisha
- Department of Animal Physiology and Biochemistry, Faculty of Veterinary Medicine, Badr University in Cairo, Badr, Egypt
- Department of Physiology, Laboratory of Biotechnology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
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Li S, Fan C, Li X, Li S, Yu T, Zhang W, Ma T, Zhao M, Li D, Xiao W, Shan A. Cannabidiol ameliorates inflammatory response partly by AGE-RAGE pathway in diabetic mice. Drug Dev Res 2023; 84:1427-1436. [PMID: 37486107 DOI: 10.1002/ddr.22093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 06/16/2023] [Accepted: 06/21/2023] [Indexed: 07/25/2023]
Abstract
Cannabidiol (CBD), the most abundant nonpsychoactive constituent of Cannabis sativa plant, is a promising potential pharmacotherapy for the treatment of diabetes and associated comorbidities. Previous studies have shown the potential of CBD to prevent diabetes in mice, the precise mechanisms of action remain unclear. The purpose of this study was to explore the mechanism of CBD alleviating hyperglycemia. The results demonstrated that CBD reduced blood glucose of STZ-induced diabetic mice without causing hypoglycemia. To elucidate the possible mechanisms of CBD effect, RNA-seq analysis was performed on high glucose-induced human mesangial cells (HMCs). By cluster analysis of differential genes, the results showed that advanced glycation end products-receptor of advanced glycation endproducts (AGE-RAGE) pathway-related genes CCL2 and interleukin-1β (IL-1β) play an important role in the biological of CBD. The expression of CCL2 and IL-1β were significantly increased in HMCs. Whereas, treatment with CBD decreased the expression of CCL2 and IL-1β. In addition, CBD significantly reduced AGE-RAGE levels in high glucose-induced HMCs. Similar results were confirmed in diabetic mice. In conclusion, we discovered for the first time that CBD ameliorates hyperglycemia partly through AGE-RAGE mediated CCL2/IL-1β pathway.
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Affiliation(s)
- Shuai Li
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
- College of Life Sciences and Agriculture and Forestry, Qiqihar University, Qiqihar, China
- State Key Laboratory of New-Tech for Chinese Medicine Pharmaceutical Process, Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, China
| | - Chunxiang Fan
- College of Life Sciences and Agriculture and Forestry, Qiqihar University, Qiqihar, China
| | - Xu Li
- State Key Laboratory of New-Tech for Chinese Medicine Pharmaceutical Process, Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, China
| | - Shanshan Li
- College of Life Sciences and Agriculture and Forestry, Qiqihar University, Qiqihar, China
| | - Tianfei Yu
- College of Life Sciences and Agriculture and Forestry, Qiqihar University, Qiqihar, China
| | - Weiwei Zhang
- College of Life Sciences and Agriculture and Forestry, Qiqihar University, Qiqihar, China
| | - Tianyi Ma
- College of Life Sciences and Agriculture and Forestry, Qiqihar University, Qiqihar, China
| | - Ming Zhao
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, China
| | - Deshan Li
- State Key Laboratory of New-Tech for Chinese Medicine Pharmaceutical Process, Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, China
| | - Wei Xiao
- State Key Laboratory of New-Tech for Chinese Medicine Pharmaceutical Process, Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, China
| | - Anshan Shan
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
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Jiang S, Su H. Cellular crosstalk of mesangial cells and tubular epithelial cells in diabetic kidney disease. Cell Commun Signal 2023; 21:288. [PMID: 37845726 PMCID: PMC10577991 DOI: 10.1186/s12964-023-01323-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 09/17/2023] [Indexed: 10/18/2023] Open
Abstract
Diabetic kidney disease (DKD) is a major cause of end-stage renal disease and imposes a heavy global economic burden; however, little is known about its complicated pathophysiology. Investigating the cellular crosstalk involved in DKD is a promising avenue for gaining a better understanding of its pathogenesis. Nonetheless, the cellular crosstalk of podocytes and endothelial cells in DKD is better understood than that of mesangial cells (MCs) and renal tubular epithelial cells (TECs). As the significance of MCs and TECs in DKD pathophysiology has recently become more apparent, we reviewed the existing literature on the cellular crosstalk of MCs and TECs in the context of DKD to acquire a comprehensive understanding of their cellular communication. Insights into the complicated mechanisms underlying the pathophysiology of DKD would improve its early detection, care, and prognosis. Video Abstract.
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Affiliation(s)
- Shan Jiang
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Hua Su
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
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Liu B, Zhang L, Yang H, Chen X, Zheng H, Liao X. SIK2 protects against renal tubular injury and the progression of diabetic kidney disease. Transl Res 2023; 253:16-30. [PMID: 36075517 DOI: 10.1016/j.trsl.2022.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/17/2022] [Accepted: 08/22/2022] [Indexed: 02/03/2023]
Abstract
Despite optimal medical therapy, many patients with diabetic kidney disease (DKD) progress to end-stage renal disease. The identification of new biomarkers and drug targets for DKD is required for the development of more effective therapies. The apoptosis of renal tubular epithelial cells is a key feature of the pathogenicity associated with DKD. SIK2, a salt-inducible kinase, regulates important biological processes, such as energy metabolism, cell cycle progression and cellular apoptosis. In our current study, a notable decrease in the expression of SIK2 was detected in the renal tubules of DKD patients and murine models. Functional experiments demonstrated that deficiency or inactivity of SIK2 aggravates tubular injury and interstitial fibrosis in diabetic mice. Based on transcriptome sequencing, molecular mechanism exploration revealed that SIK2 overexpression reduces endoplasmic reticulum (ER) stress-mediated tubular epithelial apoptosis by inhibiting the histone acetyltransferase activity of p300 to activate HSF1/Hsp70. Furthermore, the specific restoration of SIK2 in tubules blunts tubular and interstitial impairments in diabetic and vancomycin-induced kidney disease mice. Together, these findings indicate that SIK2 protects against renal tubular injury and the progression of kidney disease, and make a compelling case for targeting SIK2 for therapy in DKD.
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Affiliation(s)
- Bingyao Liu
- Department of Endocrinology, Chongqing Education Commission Key Laboratory of Diabetic Translational Research, the Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Linlin Zhang
- Department of Endocrinology, Chongqing Education Commission Key Laboratory of Diabetic Translational Research, the Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Hang Yang
- Department of Endocrinology, Chongqing Education Commission Key Laboratory of Diabetic Translational Research, the Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Xinyu Chen
- Department of Pathology, Chongqing University Cancer Hospital, Chongqing, China
| | - Hongting Zheng
- Department of Endocrinology, Chongqing Education Commission Key Laboratory of Diabetic Translational Research, the Second Affiliated Hospital of Army Medical University, Chongqing, China.
| | - Xiaoyu Liao
- Department of Endocrinology, Chongqing Education Commission Key Laboratory of Diabetic Translational Research, the Second Affiliated Hospital of Army Medical University, Chongqing, China.
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Regulation of the Homeostatic Unfolded Protein Response in Diabetic Nephropathy. Pharmaceuticals (Basel) 2022; 15:ph15040401. [PMID: 35455399 PMCID: PMC9030951 DOI: 10.3390/ph15040401] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/09/2022] [Accepted: 03/23/2022] [Indexed: 02/06/2023] Open
Abstract
A growing body of scientific evidence indicates that protein homeostasis, also designated as proteostasis, is causatively linked to chronic diabetic nephropathy (DN). Experimental studies have demonstrated that the insulin signaling in podocytes maintain the homeostatic unfolded protein response (UPR). Insulin signaling via the insulin receptor non-canonically activates the spliced X-box binding protein-1 (sXBP1), a highly conserved endoplasmic reticulum (ER) transcription factor, which regulates the expression of genes that control proteostasis. Defective insulin signaling in mouse models of diabetes or the genetic disruption of the insulin signaling pathway in podocytes propagates hyperglycemia induced maladaptive UPR and DN. Insulin resistance in podocytes specifically promotes activating transcription factor 6 (ATF6) dependent pathogenic UPR. Akin to insulin, recent studies have identified that the cytoprotective effect of anticoagulant serine protease-activated protein C (aPC) in DN is mediated by sXBP1. In mouse models of DN, treatment with chemical chaperones that improve protein folding provides an additional benefit on top of currently used ACE inhibitors. Understanding the molecular mechanisms that transmute renal cell specific adaptive responses and that deteriorate renal function in diabetes will enable researchers to develop new therapeutic regimens for DN. Within this review, we focus on the current understanding of homeostatic mechanisms by which UPR is regulated in DN.
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Khan MF, Mathur A, Pandey VK, Kakkar P. Endoplasmic reticulum stress-dependent activation of TRB3-FoxO1 signaling pathway exacerbates hyperglycemic nephrotoxicity: Protection accorded by Naringenin. Eur J Pharmacol 2022; 917:174745. [PMID: 34998792 DOI: 10.1016/j.ejphar.2022.174745] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 12/07/2021] [Accepted: 01/03/2022] [Indexed: 12/22/2022]
Abstract
Endoplasmic reticulum (ER) dysfunction contributes greatly to the pathophysiology of hyperglycemic nephrotoxicity. This study unravels the critical role of Tribbles 3 (TRB3)-Forkhead box O1 (FoxO1) signaling pathway during hyperglycemic renal toxicity. It also uncovers the novel role of Naringenin, a flavanone, in regulating ER stress in proximal tubular cells, NRK 52E, and kidneys of streptozotocin/nicotinamide induced experimental diabetic Wistar rats. Results demonstrate that expression of ER stress marker proteins including phosphorylated protein kinase ER like kinase (p-PERK), phosphorylated eukaryotic Initiation Factor 2α (p-eIF2α), X Box Binding Protein 1 spliced (XBP1s), Activating Transcription Factor 4 (ATF4) and C/EBP Homologous Protein (CHOP) were upregulated in diabetic kidneys indicating the activation of ER stress response due to nephrotoxicity. Treatment with Naringenin reduced the expression of TRB3, an ER stress-inducible pseudokinase, both in vitro and in vivo. Gene silencing of TRB3 enhanced Akt and FoxO1 phosphorylation and alleviated FoxO1 mediated apoptosis during hyperglycemic nephrotoxicity. Notably, TRB3 gene silencing effects were comparable to the response with Naringenin treatment. Prevention of nuclear colocalization of ATF4 and CHOP in Naringenin treated cells was evident. Naringenin also reduced insulin resistance, apoptosis and glycogen accumulation along with enhancement of glucose tolerance in diabetic rats. Prevention of ultrastructural aberrations in the ER of hyperglycemic renal cells by Naringenin confirmed its anti-ER stress effects. These findings affirm that activation of TRB3-FoxO1 signaling is critical in the pathogenesis of hyperglycemia-induced renal toxicity and protective effect of Naringenin via modulation of ER stress may be exploited as a novel approach for its management.
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Affiliation(s)
- Mohammad Fareed Khan
- Herbal Research Laboratory, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Alpana Mathur
- Herbal Research Laboratory, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India
| | - Vivek Kumar Pandey
- Herbal Research Laboratory, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Poonam Kakkar
- Herbal Research Laboratory, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Liu C, Wu K, Gao H, Li J, Xu X. Current Strategies and Potential Prospects for Nanoparticle-Mediated Treatment of Diabetic Nephropathy. Diabetes Metab Syndr Obes 2022; 15:2653-2673. [PMID: 36068795 PMCID: PMC9441178 DOI: 10.2147/dmso.s380550] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 08/20/2022] [Indexed: 11/23/2022] Open
Abstract
Diabetic nephropathy (DN), a severe microvascular complication of diabetes mellitus (DM), is the most common form of chronic kidney disease (CKD) and a leading cause of renal failure in end-stage renal disease. No currently available treatment can achieve complete cure. Traditional treatments have many limitations, such as painful subcutaneous insulin injections, nephrotoxicity and hepatotoxicity with oral medication, and poor patient compliance with continual medication intake. Given the known drawbacks, recent research has suggested that nanoparticle-based drug delivery platforms as therapeutics may provide a promising strategy for treating debilitating diseases such as DN in the future. This administration method provides multiple advantages, such as delivering the loaded drug to the precise target of action and enabling early prevention of CKD progression. This article discusses the development of the main currently used nanoplatforms, such as liposomes, polymeric NPs, and inorganic NPs, as well as the prospects and drawbacks of nanoplatform application in the treatment of CKD.
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Affiliation(s)
- Chunkang Liu
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University, Changchun, People’s Republic of China
| | - Kunzhe Wu
- Department of Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, People’s Republic of China
| | - Huan Gao
- Department of Nephrology, China-Japan Union Hospital of Jilin University, Changchun, People’s Republic of China
| | - Jianyang Li
- Department of Nephrology, China-Japan Union Hospital of Jilin University, Changchun, People’s Republic of China
| | - Xiaohua Xu
- Department of Nephrology, China-Japan Union Hospital of Jilin University, Changchun, People’s Republic of China
- Correspondence: Xiaohua Xu, Email
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Chinese Herbal Medicine Alleviates Myocardial Ischemia/Reperfusion Injury by Regulating Endoplasmic Reticulum Stress. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:4963346. [PMID: 34917158 PMCID: PMC8670943 DOI: 10.1155/2021/4963346] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 11/16/2021] [Indexed: 02/06/2023]
Abstract
Myocardial ischemia/reperfusion injury is the main cause of increased mortality and disability in cardiovascular diseases. The injury involves many pathological processes, such as oxidative stress, calcium homeostasis imbalance, inflammation, and energy metabolism disorders, and these pathological stimuli can activate endoplasmic reticulum stress. In the early stage of ischemia, endoplasmic reticulum stress alleviates the injury as an adaptive survival response, but the long-term stress on endoplasmic reticulum amplifies oxidative stress, inflammation, and calcium overload to accelerate cell damage and apoptosis. Therefore, regulation of endoplasmic reticulum stress may be a mechanism to improve ischemia/reperfusion injury. Chinese herbal medicine has a long history of clinical application and unique advantages in the treatment of ischemic heart diseases. This review focuses on the effect of Chinese herbal medicine on myocardial ischemia/reperfusion injury from the perspective of regulation of endoplasmic reticulum stress.
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Endoplasmic reticulum stress: Multiple regulatory roles in hepatocellular carcinoma. Biomed Pharmacother 2021; 142:112005. [PMID: 34426262 DOI: 10.1016/j.biopha.2021.112005] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/25/2021] [Accepted: 08/01/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Endoplasmic reticulum (ER) stress is a basic cellular stress response that maintains cellular protein homeostasis under endogenous or exogenous stimuli, which depends on the stimulus, its intensity, and action time. The ER produces a corresponding cascade reaction for crosstalk of adaptive and/or pro-death regulation with other organelles. Hepatocellular carcinoma(HCC) is one of the most common malignant solid tumors with an extremely poor prognosis. Viral hepatitis infection, cirrhosis, and steatohepatitis are closely related to the occurrence and development of HCC, and ER stress has gradually been shown to be a major mechanism. Moreover, an increasing need for protein and lipid products and relative deficiencies of oxygen and nutrients for rapid proliferation and endoplasmic reticulum stress are undoubtedly involved. Therefore, to fully and comprehensively understand the regulatory role of endoplasmic reticulum stress in the occurrence and progression of HCC is of vital importance to explore its pathogenesis and develop novel anti-cancer strategies. METHODOLOGY We searched for relevant publications in the PubMed databases using the keywords "Endoplasmic reticulum stress", "hepatocellular carcinoma" in last five years,and present an overview of the current knowledge that links ER stress and HCC, which includes carcinogenesis, progression, and anti-cancer strategies, and propose directions of future research. RESULT ER stress were confirmed to be multiple regulators or effectors of cancer, which also be confirmed to drive tumorigenesis and progression of HCC. Targeting ER stress signaling pathway and related molecules could play a critical role for anti-HCC and has become a research hotspot for anti-cancer in recent years. CONCLUSION ER stress are critical for the processes of the tumorigenesis and progression of tumors. For HCC, ER stress was associated with tumorigenesis, development, metastasis, angiogenesis and drug resistance, targeting ER stress has emerged as a potential anti-tumor strategy.
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Aouichat S, Navarro-Alarcon M, Alarcón-Guijo P, Salagre D, Ncir M, Zourgui L, Agil A. Melatonin Improves Endoplasmic Reticulum Stress-Mediated IRE1α Pathway in Zücker Diabetic Fatty Rat. Pharmaceuticals (Basel) 2021; 14:232. [PMID: 33800157 PMCID: PMC8001258 DOI: 10.3390/ph14030232] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 12/12/2022] Open
Abstract
Obesity and diabetes are linked to an increased prevalence of kidney disease. Endoplasmic reticulum stress has recently gained growing importance in the pathogenesis of obesity and diabetes-related kidney disease. Melatonin, is an important anti-obesogenic natural bioactive compound. Previously, our research group showed that the renoprotective effect of melatonin administration was associated with restoring mitochondrial fission/fusion balance and function in a rat model of diabesity-induced kidney injury. This study was carried out to further investigate whether melatonin could suppress renal endoplasmic reticulum (ER) stress response and the downstream unfolded protein response activation under obese and diabetic conditions. Zücker diabetic fatty (ZDF) rats and lean littermates (ZL) were orally supplemented either with melatonin (10 mg/kg body weight (BW)/day) (M-ZDF and M-ZL) or vehicle (C-ZDF and C-ZL) for 17 weeks. Western blot analysis of ER stress-related markers and renal morphology were assessed. Compared to C-ZL rats, higher ER stress response associated with impaired renal morphology was observed in C-ZDF rats. Melatonin supplementation alleviated renal ER stress response in ZDF rats, by decreasing glucose-regulated protein 78 (GRP78), phosphoinositol-requiring enzyme1α (IRE1α), and ATF6 levels but had no effect on phospho-protein kinase RNA-like endoplasmic reticulum kinase (PERK) level. In addition, melatonin supplementation also restrained the ER stress-mediated apoptotic pathway, as indicated by decreased pro-apoptotic proteins phospho-c-jun amino terminal kinase (JNK), Bax, and cleaved caspase-3, as well as by upregulation of B cell lymphoma (Bcl)-2 protein. These improvements were associated with renal structural recovery. Taken together, our findings revealed that melatonin play a renoprotective role, at least in part, by suppressing ER stress and related pro-apoptotic IRE1α/JNK signaling pathway.
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Affiliation(s)
- Samira Aouichat
- Department of Pharmacology, Biohealth Institute and Neurosciences Institute, School of Medicine, University of Granada, 18016 Granada, Spain; (S.A.); (P.A.-G.); (D.S.)
- Team of Cellular and Molecular Physiopathology, Faculty of Biological Sciences, University of Sciences and Technology Houari Boumediene, El Alia, Algiers 16111, Algeria
| | - Miguel Navarro-Alarcon
- Department of Nutrition and Bromatology, School of Pharmacy, University of Granada, 18071 Granada, Spain;
| | - Pablo Alarcón-Guijo
- Department of Pharmacology, Biohealth Institute and Neurosciences Institute, School of Medicine, University of Granada, 18016 Granada, Spain; (S.A.); (P.A.-G.); (D.S.)
| | - Diego Salagre
- Department of Pharmacology, Biohealth Institute and Neurosciences Institute, School of Medicine, University of Granada, 18016 Granada, Spain; (S.A.); (P.A.-G.); (D.S.)
| | - Marwa Ncir
- Bioactive Molecule Valorization Research Unit, Higher Institute of Applied Biology of Medenine, University of Gabes, Gabes 4119, Tunisia; (M.N.); (L.Z.)
| | - Lazhar Zourgui
- Bioactive Molecule Valorization Research Unit, Higher Institute of Applied Biology of Medenine, University of Gabes, Gabes 4119, Tunisia; (M.N.); (L.Z.)
| | - Ahmad Agil
- Department of Pharmacology, Biohealth Institute and Neurosciences Institute, School of Medicine, University of Granada, 18016 Granada, Spain; (S.A.); (P.A.-G.); (D.S.)
- Biosanitary Research Institute of Granada (ibs. GRANADA), University Hospital of Granada, 18016 Granada, Spain
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Roles of mTOR in Diabetic Kidney Disease. Antioxidants (Basel) 2021; 10:antiox10020321. [PMID: 33671526 PMCID: PMC7926630 DOI: 10.3390/antiox10020321] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/13/2021] [Accepted: 02/18/2021] [Indexed: 02/06/2023] Open
Abstract
Diabetic kidney disease (DKD) is the leading cause of end-stage renal disease and the number of patients affected is increasing worldwide. Thus, there is a need to establish a new treatment for DKD to improve the renal prognosis of diabetic patients. Recently, it has shown that intracellular metabolic abnormalities are involved in the pathogenesis of DKD. In particular, the activity of mechanistic target of rapamycin complex 1 (mTORC1), a nutrient-sensing signaling molecule, is hyperactivated in various organs of diabetic patients, which suggests the involvement of excessive mTORC1 activation in the pathogenesis of diabetes. In DKD, hyperactivated mTORC1 may be involved in the pathogenesis of podocyte damage, which causes proteinuria, and tubular cell injury that decreases renal function. Therefore, elucidating the role of mTORC1 in DKD and developing new therapeutic agents that suppress mTORC1 hyperactivity may shed new light on DKD treatments in the future.
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Pathomthongtaweechai N, Chutipongtanate S. AGE/RAGE signaling-mediated endoplasmic reticulum stress and future prospects in non-coding RNA therapeutics for diabetic nephropathy. Biomed Pharmacother 2020; 131:110655. [PMID: 32853909 DOI: 10.1016/j.biopha.2020.110655] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/01/2020] [Accepted: 08/17/2020] [Indexed: 12/14/2022] Open
Abstract
Disturbance of endoplasmic reticulum (ER) homeostasis triggered by the accumulation of unfolded proteins and advanced glycation end-products (AGEs) plays a major role in pathophysiology of diabetic nephropathy. Activation of receptor for AGEs (RAGE) stimulates NADPH oxidase-mediated reactive oxygen species (ROS) production, leading to ER stress, inflammation, glomerular hypertrophy, podocyte injury, and renal fibrosis. A growing body of evidence indicates that non-coding RNAs (ncRNAs) could rescue ER stress and renal inflammation by the epigenetic modification. This review summarizes ncRNA regulation in AGE/RAGE signaling-mediated ER stress, and discusses the opportunities and challenges of ncRNA-loaded extracellular vesicle therapy in diabetic nephropathy.
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Affiliation(s)
- Nutthapoom Pathomthongtaweechai
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakan, 10540, Thailand.
| | - Somchai Chutipongtanate
- Pediatric Translational Research Unit, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, 10400, Thailand; Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, 10400, Thailand.
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17
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Wu L, Wang Q, Guo F, Ma X, Wang J, Zhao Y, Yan Y, Qin G. Involvement of miR-27a-3p in diabetic nephropathy via affecting renal fibrosis, mitochondrial dysfunction, and endoplasmic reticulum stress. J Cell Physiol 2020; 236:1454-1468. [PMID: 32691413 DOI: 10.1002/jcp.29951] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/19/2020] [Accepted: 07/07/2020] [Indexed: 12/16/2022]
Abstract
Diabetic nephropathy (DN) is acknowledged as a serious chronic complication of diabetes mellitus. Nevertheless, its pathogenesis is complicated and unclear. Thus, in this study, the role of miR-27a-3p-prohibitin/TMBIM6 signaling axis in the progression of DN was elucidated. Type 2 diabetic db/db mice and high glucose (HG)-challenged HK-2 cells were used as in vivo and in vitro models. Our results showed that miR-27a-3p was upregulated and prohibitin or transmembrane BAX inhibitor motif containing 6 (TMBIM6) was downregulated in the kidney tissues of db/db mice and HG-treated HK-2 cells. Silencing miR-27a-3p enhanced the expression of prohibitin and TMBIM6 in the kidney tissues and HK-2 cells. Inhibition of miR-27a-3p improved functional injury, as evidenced by decreased blood glucose, urinary albumin, serum creatinine, and blood urea nitrogen levels. MiR-27a-3p silencing ameliorated renal fibrosis, reflected by reduced profibrogenic genes (e.g., transforming growth factor β1, fibronectin, collagen I and III, and α-smooth muscle actin). Furthermore, inhibition of miR-27a-3p relieved mitochondrial dysfunction in the kidney of db/db mice, including upregulation of mitochondrial membrane potential, complex I and III activities, adenosine triphosphate, and mitochondrial cytochrome C, as well as suppressing reactive oxygen species production. In addition, miR-27a-3p silencing attenuated endoplasmic reticulum (ER) stress, reflected by reduced expression of p-IRE1α, p-eIF2α, XBP1s, and CHOP. Mechanically, we identified prohibitin and TMBIM6 as direct targets of miR-27a-3p. Inhibition of miR-27a-3p protected HG-treated HK-2 cells from apoptosis, extracellular matrix accumulation, mitochondrial dysfunction, and ER stress by regulating prohibitin or TMBIM6. Taken together, we reveal that miR-27a-3p-prohibitin/TMBIM6 signaling axis regulates the progression of DN, which can be a potential therapeutic target.
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Affiliation(s)
- Lina Wu
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Qingzhu Wang
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Feng Guo
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaojun Ma
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jiao Wang
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yanyan Zhao
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yushan Yan
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Guijun Qin
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Li Y, Ren D, Shen Y, Zheng X, Xu G. Altered DNA methylation of TRIM13 in diabetic nephropathy suppresses mesangial collagen synthesis by promoting ubiquitination of CHOP. EBioMedicine 2020; 51:102582. [PMID: 31901873 PMCID: PMC6940716 DOI: 10.1016/j.ebiom.2019.11.043] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 11/25/2019] [Accepted: 11/25/2019] [Indexed: 12/26/2022] Open
Abstract
Background Mesangial collagen synthesis in renal glomeruli contributes to the pathogenesis of diabetic nephropathy (DN) which is one of the most serious complications of diabetes mellitus. However, the underlying mechanism of mesangial collagen synthesis is largely unknown. Methods The differential expression of CHOP and TRIM13 which is a well-defined E3 ubiquitin ligase was compared in renal biopsy samples from DN/normal renal tissues, in isolated glomeruli of diabetic/control mice, as well as in high glucose (HG) or TGF-β1-stimulated renal mesangial cells. Then the relationship between TRIM13 and CHOP was explored using the ubiquitination assay. Findings We found that the expression of TRIM13 was downregulated in renal biopsies, isolated glomeruli of diabetic mice, and HG/TGF-β1-stimulated renal mesangial cells, while the expression of CHOP was upregulated. An increased level of TRIM13 promoter methylation contributed to the deregulation of TRIM13 in renal glomeruli of DN. The ubiquitination assay confirmed that TRIM13 promoted ubiquitination and degradation of CHOP. Meanwhile, overexpressing TRIM13 attenuated DN-induced collagen synthesis and restored renal function in vitro and in vivo via downregulating CHOP. Interpretation Our findings demonstrated that overexpressed TRIM13 suppresses mesangial collagen synthesis in DN by promoting ubiquitination of CHOP, suggesting TRIM13 as a potential therapeutic target in treating DN.
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Affiliation(s)
- Yebei Li
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, No.1 Minde Road, Donghu District, Nanchang, Jiangxi 330006, China
| | - Daijin Ren
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, No.1 Minde Road, Donghu District, Nanchang, Jiangxi 330006, China
| | - Yunfeng Shen
- Department of Endocrinology, The Second Affiliated Hospital of Nanchang University, China
| | - Xiaoxu Zheng
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University, Washington DC, United States
| | - Gaosi Xu
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, No.1 Minde Road, Donghu District, Nanchang, Jiangxi 330006, China.
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Chen YY, Peng XF, Liu GY, Liu JS, Sun L, Liu H, Xiao L, He LY. Protein arginine methyltranferase-1 induces ER stress and epithelial-mesenchymal transition in renal tubular epithelial cells and contributes to diabetic nephropathy. Biochim Biophys Acta Mol Basis Dis 2019; 1865:2563-2575. [PMID: 31199999 DOI: 10.1016/j.bbadis.2019.06.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 05/27/2019] [Accepted: 06/03/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND In this study, we examined the association of PRMT1 with ER stress and epithelial-mesenchymal transition (EMT), two critical pathogenic mechanisms leading to DN development, in proximal tubular epithelial cells (PTECs). METHODS The level of PRMT1 was compared between the serum from DN patients and healthy individuals by ELISA, and between renal tissues of DN mice and normal mice using RT-qPCR and immunohistochemistry. Using high-glucose-treated PTEC cell line, HK2 cells as the model system, the significance of PRMT1 in ER stress and EMT was assessed by shRNA targeting PRMT1 (sh-PRMT1) and/or by overexpressing PRMT1. Mechanistic studies focused on three major pathways controlling ER stress: protein kinase R-like ER kinase (PERK), inositol requiring-1α (IRE1α), and activating transcription factor 6 (ATF6). RESULTS PRMT1 was up-regulated in the serum of DN patients and renal tissues of DN mice. High glucose administration induced elevation of PRMT1 expression in HK2 cells in vitro, accompanied with ER stress and EMT activation. PRMT1 knockdown attenuated high glucose-induced ER stress and apoptosis by inactivating PERK and ATF6, but not IRE1α. PRMT1 activated ATF6 by recruiting H4R3me2as to the promoter. Furthermore, PRMT1-induced ER stress was concomitant with the activation of an EMT-like state. Specifically, inhibition of ATF6, but not PERK blocked PRMT1-induced EMT in high-glucose-treatment HK2 cells. CONCLUSIONS By activating ER stress, PRMT1 essentially regulates the apoptosis and EMT of PTECs in response to diabetic milieu. Thus, targeting PRMT1 may alleviate both tissue injury and renal fibrosis, and thus benefit the treatment of DN.
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Affiliation(s)
- Yin-Yin Chen
- Department of Nephrology, Laboratory of Kidney Disease of Hunan Provincial People's Hospital, Hunan Normal University, Changsha 410005, PR China
| | - Xiao-Fei Peng
- Department of Rheumatology and Immunology, The Second Xiangya Hospital, Central South University, Changsha 410011, PR China
| | - Guo-Yong Liu
- Department of Nephrology, The First Affiliated Hospital of Changde Vocational Technical College, Changde 415000, PR China
| | - Jin-Song Liu
- Department of Nephrology, Chinese Medicine and Western Medicine Hospital Affiliated to Hunan University of Chinese Medicine, Changsha 410011, PR China
| | - Lin Sun
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha 410011, PR China
| | - Hong Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha 410011, PR China
| | - Li Xiao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha 410011, PR China
| | - Li-Yu He
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha 410011, PR China.
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20
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Nupr1 regulates palmitate-induced apoptosis in human articular chondrocytes. Biosci Rep 2019; 39:BSR20181473. [PMID: 30674641 PMCID: PMC6379229 DOI: 10.1042/bsr20181473] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 01/04/2019] [Accepted: 01/09/2019] [Indexed: 12/18/2022] Open
Abstract
Obesity, a major risk factor for the development of osteoarthritis (OA), is associated with increased circulating levels of free fatty acids (FFA). However, the role of these FFAs in OA pathophysiology is not clearly understood. In the present study, we found that palmitate treatment of human primary articular chondrocytes increased the expression of ER stress markers [activating transcription factor 4 (ATF4), C/EBP homologous protein (CHOP)] and apoptosis markers [cytochrome c and cleaved caspase-3 (CC3)]. Palmitate treatment also increased the expression of Nuclear protein 1 (Nupr1) and tribbles related protein 3 (TRB3), which are known negative regulators of cell survival pathways. Knockdown of Nupr1 or CHOP expression inhibited palmitate mediated increased expression of TRB3 and CC3, indicating that Nupr1 and CHOP cooperate to regulate cell survival and apoptotic pathways in human chondrocytes. Nupr1 knockdown had no effect on CHOP expression whereas CHOP knockdown abolished the palmitate-mediated Nupr1 expression, indicating that CHOP is functional upstream to Nupr1 in this pathway. Moreover, overexpression of Nupr1 markedly increased the basal expression of pro-apoptotic molecules, including cytochrome c and CC3. Taken together, our study demonstrates that Nupr1 plays a crucial role in palmitate-induced apoptosis in human chondrocytes and Nupr1 as a potential novel drug target for the treatment of OA.
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21
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Cheng W, Mi L, Tang J, Yu W. Expression of TRB3 promotes epithelial‑mesenchymal transition of MLE‑12 murine alveolar type II epithelial cells through the TGF‑β1/Smad3 signaling pathway. Mol Med Rep 2019; 19:2869-2875. [PMID: 30720074 DOI: 10.3892/mmr.2019.9900] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 11/12/2018] [Indexed: 11/05/2022] Open
Abstract
The aim of the present study was to investigate whether the expression of tribbles pseudokinase 3 (TRB3) is involved in pulmonary interstitial fibrosis and to examine the possible mechanisms. The expression of TRB3 in murine alveolar type II epithelial cells (MLE‑12 cells) following transforming growth factor β1 (TGF‑β1) stimulation was assessed using various techniques, including western blot and reverse transcription‑quantitative polymerase chain reaction assays. TRB3 overexpression and downregulation models were used to evaluate the impact of TRB3 on the TGF‑β1‑induced epithelial‑mesenchymal transition (EMT) of MLE‑12 cells. The downregulation of TRB3 was induced by RNA interference. The expression of TRB3 was significantly increased in MLE‑12 cells following the activation of TGF‑β1 (P<0.05). The overexpression of TRB3 was found to promote activation of the TGF‑β1/Smad3 signaling pathway, EMT, and the upregulated expression of β‑catenin and EMT‑related genes and proteins (P<0.05), whereas the downregulation of TRB3 attenuated the promoting effect on EMT induced by TGF‑β1. In addition, the overexpression of TRB3 inhibited MLE‑12 cell proliferation by stimulating apoptosis, leading to the formation of pulmonary fibrosis (PF). The positive feedback loop demonstrated that TGF‑β1 induced the expression of TRB3, and TRB3, in turn, stimulated EMT and promoted the onset of PF through activation of the TGF‑β1/Smad3 signaling pathway. Therefore, TRB3 may promote the formation of PF through the TGF‑β1/Smad3 signaling pathway.
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Affiliation(s)
- Wei Cheng
- Department of Respiratory Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Liyun Mi
- Department of Respiratory Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Jie Tang
- Department of Respiratory Medicine, Yantai Yuhuangding Hospital, Yantai, Shandong 264000, P.R. China
| | - Wencheng Yu
- Department of Respiratory Medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
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Hu H, Tian M, Ding C, Yu S. The C/EBP Homologous Protein (CHOP) Transcription Factor Functions in Endoplasmic Reticulum Stress-Induced Apoptosis and Microbial Infection. Front Immunol 2019; 9:3083. [PMID: 30662442 PMCID: PMC6328441 DOI: 10.3389/fimmu.2018.03083] [Citation(s) in RCA: 616] [Impact Index Per Article: 123.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/13/2018] [Indexed: 12/17/2022] Open
Abstract
Apoptosis is a form of cell death by which the body maintains the homeostasis of the internal environment. Apoptosis is an initiative cell death process that is controlled by genes and is mainly divided into endogenous pathways (mitochondrial pathway), exogenous pathways (death receptor pathway), and apoptotic pathways induced by endoplasmic reticulum (ER) stress. The homeostasis imbalance in ER results in ER stress. Under specific conditions, ER stress can be beneficial to the body; however, if ER protein homeostasis is not restored, the prolonged activation of the unfolded protein response may initiate apoptotic cell death via the up-regulation of the C/EBP homologous protein (CHOP). CHOP plays an important role in ER stress-induced apoptosis and this review focuses on its multifunctional roles in that process, as well as its role in apoptosis during microbial infection. We summarize the upstream and downstream pathways of CHOP in ER stress induced apoptosis. We also focus on the newest discoveries in the functions of CHOP-induced apoptosis during microbial infection, including DNA and RNA viruses and some species of bacteria. Understanding how CHOP functions during microbial infection will assist with the development of antimicrobial therapies.
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Affiliation(s)
- Hai Hu
- Department of Veterinary Public Health, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Mingxing Tian
- Department of Veterinary Public Health, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Chan Ding
- Department of Veterinary Public Health, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Shengqing Yu
- Department of Veterinary Public Health, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
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Zhou Y, Liu X, Li W, Sun X, Xie Z. Endoplasmic reticulum stress contributes to the pathogenesis of stress urinary incontinence in postmenopausal women. J Int Med Res 2018; 46:5269-5277. [PMID: 30426803 PMCID: PMC6300970 DOI: 10.1177/0300060518807602] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Objective To investigate the relationship between endoplasmic reticulum stress (ERS) and the pathogenesis of stress urinary incontinence (SUI) in postmenopausal women. Methods Anterior vaginal wall tissue was collected from postmenopausal women with SUI and control subjects. Western blotting was performed for glucose-regulated protein (GRP78), inositol-requiring enzyme 1(IRE1), protein kinase-like endoplasmic reticulum kinase (PERK), activating transcription factor 6 (ATF6), C/EBP-homologous protein (CHOP), and B-cell lymphoma 2 (Bcl-2). Additionally, mRNA expression levels of PERK, activating transcription factor 4 (ATF4), and CHOP were examined by real-time polymerase chain reaction. Results GRP78 protein and mRNA expression levels were significantly lower in women with SUI, compared with control subjects. PERK and p-PERK expression levels were higher in women with SUI than in control subjects. However, no differences in IRE1 or ATF6 expression levels were observed in either group. Notably, higher CHOP and lower Bcl-2 protein expression levels were detected in women with SUI, compared with control subjects. Furthermore, PERK, ATF4, and CHOP mRNA expression levels were significantly higher in women with SUI than in control subjects. Conclusions Alterations of ERS markers in SUI suggest that ERS may be involved in the development of SUI in postmenopausal women.
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Affiliation(s)
- Yong Zhou
- Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China
| | - Xiaoxia Liu
- Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China
| | - Wenjuan Li
- Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China
| | - Xiaoyan Sun
- Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China
| | - Zhenwei Xie
- Department of Gynecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China
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24
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Zhao Y, Du ZH, Talukder M, Lin J, Li XN, Zhang C, Li JL. Crosstalk between unfolded protein response and Nrf2-mediated antioxidant defense in Di-(2-ethylhexyl) phthalate-induced renal injury in quail (Coturnix japonica). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 242:1871-1879. [PMID: 30077409 DOI: 10.1016/j.envpol.2018.07.080] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/29/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
The widely used Di-(2-ethylhexyl) phthalate (DEHP) has been reported to exhibit ubiquitous environmental and global health hazards. The bioaccumulation and environmental persistence of DEHP can cause serious health hazards in wildlife animals and human. However, DEHP-induced nephrotoxicity in bird is remained unknown. Thus, this study explored the related mechanism of DEHP nephrotoxicity in quail. For this purpose, quail were exposed with DEHP at doses of 0, 250, 500, and 1000 mg/kg body weight daily by gavage administration for 45 days. The results showed that DEHP exposure induced renal injury, oxidative stress, and endoplasmic reticulum (ER) degeneration. Low level DEHP (250 mg/kg) exposure inhibited Nrf2 signaling pathway and induced renal injury via oxidative stress and suppressed the unfolded protein response (UPR) signaling pathway and induced ER stress in the kidney. But surprisingly, high level DEHP (500 mg/kg and 1000 mg/kg) exposure activated Nrf2 and UPR signaling pathways and protected kidney, but they still couldn't resist the toxicity of DEHP. Our study demonstrated that DEHP-induced nephrotoxicity in quail was associated with activating Nrf2-mediated antioxidant defense response and UPR signaling pathway.
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Affiliation(s)
- Yi Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Zheng-Hai Du
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Milton Talukder
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China; Department of Physiology and Pharmacology, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Barishal, 8210, Bangladesh
| | - Jia Lin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Xue-Nan Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Cong Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Jin-Long Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, PR China.
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Sun W, Yang J, Wang W, Hou J, Cheng Y, Fu Y, Xu Z, Cai L. The beneficial effects of Zn on Akt-mediated insulin and cell survival signaling pathways in diabetes. J Trace Elem Med Biol 2018; 46:117-127. [PMID: 29413101 DOI: 10.1016/j.jtemb.2017.12.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 12/06/2017] [Accepted: 12/21/2017] [Indexed: 12/11/2022]
Abstract
Zinc is one of the essential trace elements and participates in numerous physiological processes. Abnormalities in zinc homeostasis often result in the pathogenesis of various chronic metabolic disorders, such as diabetes and its complications. Zinc has insulin-mimetic and anti-diabetic effects and deficiency has been shown to aggravate diabetes-induced oxidative stress and tissue injury in diabetic rodent models and human subjects with diabetes. Akt signaling pathway plays a central role in insulin-stimulated glucose metabolism and cell survival. Anti-diabetic effects of zinc are largely dependent on the activation of Akt signaling. Zn is also an inducer of metallothionein that plays important role in anti-oxidative stress and damage. However, the exact molecular mechanisms underlying zinc-induced activation of Akt signaling pathway remains to be elucidated. This review summarizes the recent advances in deciphering the possible mechanisms of zinc on Akt-mediated insulin and cell survival signaling pathways in diabetes conditions. Insights into the effects of zinc on epigenetic regulation and autophagy in diabetic nephropathy are also discussed in the latter part of this review.
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Affiliation(s)
- Weixia Sun
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
| | - Jiaxing Yang
- Department of Gastrointestinal Surgery, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
| | - Wanning Wang
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China; Pediatric Research Institute, The Departments of Pediatrics, Radiation Oncology, Pharmacology and Toxicology, The University of Louisville, Louisville, KY 40202, USA
| | - Jie Hou
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
| | - Yanli Cheng
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
| | - Yaowen Fu
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
| | - Zhonggao Xu
- Department of Nephrology, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
| | - Lu Cai
- Pediatric Research Institute, The Departments of Pediatrics, Radiation Oncology, Pharmacology and Toxicology, The University of Louisville, Louisville, KY 40202, USA
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Riera-Borrull M, Cuevas VD, Alonso B, Vega MA, Joven J, Izquierdo E, Corbí ÁL. Palmitate Conditions Macrophages for Enhanced Responses toward Inflammatory Stimuli via JNK Activation. THE JOURNAL OF IMMUNOLOGY 2017; 199:3858-3869. [PMID: 29061766 DOI: 10.4049/jimmunol.1700845] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 09/22/2017] [Indexed: 12/13/2022]
Abstract
Obesity is associated with low-grade inflammation and elevated levels of circulating saturated fatty acids, which trigger inflammatory responses by engaging pattern recognition receptors in macrophages. Because tissue homeostasis is maintained through an adequate balance of pro- and anti-inflammatory macrophages, we assessed the transcriptional and functional profile of M-CSF-dependent monocyte-derived human macrophages exposed to concentrations of saturated fatty acids found in obese individuals. We report that palmitate (C16:0, 200 μM) significantly modulates the macrophage gene signature, lowers the expression of transcription factors that positively regulate IL-10 expression (MAFB, AhR), and promotes a proinflammatory state whose acquisition requires JNK activation. Unlike LPS, palmitate exposure does not activate STAT1, and its transcriptional effects can be distinguished from those triggered by LPS, as both agents oppositely regulate the expression of CCL19 and TRIB3 Besides, palmitate conditions macrophages for exacerbated proinflammatory responses (lower IL-10 and CCL2, higher TNF-α, IL-6, and IL-1β) toward pathogenic stimuli, a process also mediated by JNK activation. All of these effects of palmitate are fatty acid specific because oleate (C18:1, 200 μM) does not modify the macrophage transcriptional and functional profiles. Therefore, pathologic palmitate concentrations promote the acquisition of a specific polarization state in human macrophages and condition macrophages for enhanced responses toward inflammatory stimuli, with both effects being dependent on JNK activation. Our results provide further insight into the macrophage contribution to obesity-associated inflammation.
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Affiliation(s)
- Marta Riera-Borrull
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, 28040 Madrid, Spain; and.,Unitat de Recerca Biomèdica, Hospital Universitari Sant Joan, Institut d'Investigació Sanitària Pere Virgili, Universitat Rovira i Virgili, 43201 Reus, Spain
| | - Víctor D Cuevas
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, 28040 Madrid, Spain; and
| | - Bárbara Alonso
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, 28040 Madrid, Spain; and
| | - Miguel A Vega
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, 28040 Madrid, Spain; and
| | - Jorge Joven
- Unitat de Recerca Biomèdica, Hospital Universitari Sant Joan, Institut d'Investigació Sanitària Pere Virgili, Universitat Rovira i Virgili, 43201 Reus, Spain
| | - Elena Izquierdo
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, 28040 Madrid, Spain; and
| | - Ángel L Corbí
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, 28040 Madrid, Spain; and
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Liu H, Zhang Z, Li Q. DR5 but not miRNA-181 or miRNA-211 is involved in ER stress-mediated apoptosis induced by palmitate in islet β cells. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2017; 10:7692-7698. [PMID: 31966615 PMCID: PMC6965268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 05/23/2017] [Indexed: 06/10/2023]
Abstract
Free fatty acid (FFA)-induced apoptosis and endoplasmic reticulum (ER) stress of pancreatic β-cells contribute to the development of type 2 diabetes; however, the molecular mechanisms involved are not explicated clearly. In this study we have investigated the role of miRNA-181 and miRNA-211 and DR5 in saturated FFA-induced apoptosis of the rat pancreatic β-cells INS-1. Rat pancreatic β-cells INS-1 were treated with or without palmitate for 24 h. CCK-8 was used for cell viability detection. The miRNA-181 and -211 and mRNA expression of GRP78, ATF4, CHOP and DR5 were explored by quantitative real-time PCR. We found that palmitate at apoptosis-inducing concentration activated ER stress signaling pathways and the expressions of GRP78, ATF4 and CHOP were significantly increased after stimulation in INS-1 cells. In addition, mRNA level of DR5 was also upregulated in palmitate treated group. But the expressions of miRNA-181 and -211 did not significantly changed during lipoapoptosis by palmitate in INS-1 cells. We have demonstrated that miRNA-181 and miRNA-211 are not key players in ER stress-related apoptosis induced by saturated FFA in rat pancreatic β cells INS-1. However, DR5 appears to be involved in the modulation of saturated FFA-induced apoptosis of INS-1 cells, probably by a mechanism dependent on ER stress signaling.
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Affiliation(s)
- Huifang Liu
- Department of Endocrinology and Metabolism, Second Affiliated Hospital of Harbin Medical UniversityHarbin, Heilongjiang, China
- Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical UniversityHarbin, Heilongjiang, China
| | - Zhiying Zhang
- Department of Endocrinology and Metabolism, Second Affiliated Hospital of Harbin Medical UniversityHarbin, Heilongjiang, China
- Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical UniversityHarbin, Heilongjiang, China
| | - Qiang Li
- Department of Endocrinology and Metabolism, Second Affiliated Hospital of Harbin Medical UniversityHarbin, Heilongjiang, China
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Ke B, Zhu N, Luo F, Xu Y, Fang X. Targeted inhibition of endoplasmic reticulum stress: New hope for renal fibrosis (Review). Mol Med Rep 2017. [PMID: 28627612 PMCID: PMC5562070 DOI: 10.3892/mmr.2017.6762] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Chronic kidney disease (CKD) has a very high mortality rate and remains a global health challenge. Inhibiting renal fibrosis is one of the most promising therapeutic strategies for CKD. Recent studies have indicated that endoplasmic reticulum stress (ERS) serves an active role in the development of acute and chronic kidney disease, especially with regards to renal fibrosis. In the current review, the authors summarize the latest understanding of the role of ERS during the onset of renal fibrosis. ERS promotes renal fibrosis through multiple signaling pathways, such as transforming growth factor-β, epithelial-mesenchymal transition and oxidative stress. In addition, ERS also causes podocyte damage, leading to increased proteinuria and the development of renal fibrosis in rat models. In conclusion, targeted inhibition of ERS may become a promising therapeutic strategy for renal fibrosis.
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Affiliation(s)
- Ben Ke
- Department of Nephrology, The Third Hospital of Nanchang, Nanchang, Jiangxi 330009, P.R. China
| | - Na Zhu
- Nanchang University School of Medicine, Nanchang, Jiangxi 330006, P.R. China
| | - Fuli Luo
- Department of Nephrology, Chinese Medicine Hospital in Jiangxi Province, Nanchang, Jiangxi 330006, P.R. China
| | - Yang Xu
- Department of Nephrology, Jiangxi Provincial People's Hospital, Nanchang, Jiangxi 330006, P.R. China
| | - Xiangdong Fang
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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Ma Y, Chen F, Yang S, Duan Y, Sun Z, Shi J. Silencing of TRB3 Ameliorates Diabetic Tubule Interstitial Nephropathy via PI3K/AKT Signaling in Rats. Med Sci Monit 2017; 23:2816-2824. [PMID: 28600485 PMCID: PMC5475374 DOI: 10.12659/msm.902581] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background Nephropathy, a chronic progressive kidney disease often characterized by glomeruli scarring and sclerosis, is a major complication of diabetes mellitus. Development of nephropathologic lesions has been shown to be associated with suppressed AKT phosphorylation and elevated level of apoptosis. Moreover, it has been established that the TRB3 gene is capable of inhibiting AKT phosphorylation and promoting apoptosis. Material/Methods In this study, we injected TRB3 siRNA into Wistar rats with type 1 diabetes, and monitored development of nephropathy in the rats. Urinary albumin excretion and serum creatinine were used as primary indicators, and nephritic histology was also examined. We also measured the serum level of pro-inflammatory cytokines collagen expression, and phosphorylation of PI3K and AKT proteins in the kidneys. Results By silencing the TRB3 gene with siRNA, diabetic-induced nephropathy symptoms were alleviated, such as increased serum creatinine level and urinary albumin secretion. Additionally, histological examination showed lower levels of nephropathic lesions, and samples of the kidneys showed less accumulation of collagen proteins. Levels of serum cytokines, including TNF-α, IL-1β, and IL-6, were also lowered, whereas phosphorylation levels of PI3K and AKT were increased. In summary, TRB3 silencing in diabetic rats had a significant ameliorative effect on their nephropathy. Conclusions Silencing of TRB3 has a significant ameliorative effect on diabetic nephropathy in rats.
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Affiliation(s)
- Yali Ma
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, Henan, China (mainland)
| | - Fang Chen
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, Henan, China (mainland)
| | - Suxia Yang
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, Henan, China (mainland)
| | - Yurui Duan
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, Henan, China (mainland)
| | - Zhiqiang Sun
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, Henan, China (mainland)
| | - Jun Shi
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, Henan, China (mainland)
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Abstract
PURPOSE OF REVIEW Diabetic nephropathy (DN) has become the leading cause of end-stage renal disease (ESRD) worldwide. Accumulating evidence suggests that endoplasmic reticulum (ER) stress plays a major role in the development and progression of DN. Recent findings suggested that many attributes of DN, such as hyperglycemia, proteinuria, and increased advanced glycation end products and free fatty acids, can all trigger unfolded protein response (UPR) in kidney cells. Herein, we review the current knowledge on the role of ER stress in the setting of kidney injury with a specific emphasis on DN. RECENT FINDINGS As maladaptive ER stress response caused by excessively prolonged UPR will eventually cause cell death and increase kidney injury, several ER stress inhibitors have been shown to improve DN in animal models, albeit blocking both adaptive and maladaptive UPR. More recently, reticulon-1A (RTN1A), an ER-associated protein, was shown to be increased in both human and mouse diabetic kidneys. Its expression correlates with the progression of DN, and its polymorphisms are associated with kidney disease in people with diabetes. Increased RTN1A expression heightened the ER stress response and renal cell apoptosis, and conversely reduced RTN1A in renal cells decreased apoptosis and ameliorated kidney injury and DN progression, suggesting that RTN1A may be a novel target to specifically restrain the maladaptive UPR. These findings suggest that ER stress response in renal cells is a key driver of progression of DN and that the inhibition of the unchecked ER stress response in DN, such as by inhibition of RTN1A function, may be a promising therapeutic approach against DN.
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Affiliation(s)
- Ying Fan
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Kyung Lee
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L Levy Place, Box 1243, New York, NY, 10029, USA
| | - Niansong Wang
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - John Cijiang He
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L Levy Place, Box 1243, New York, NY, 10029, USA.
- Renal Section, James J Peters VAMC, Bronx, NY, USA.
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Enhanced Expression of Trib3 during the Development of Myelin Breakdown in dmy Myelin Mutant Rats. PLoS One 2016; 11:e0168250. [PMID: 27977799 PMCID: PMC5158197 DOI: 10.1371/journal.pone.0168250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 11/28/2016] [Indexed: 12/02/2022] Open
Abstract
The demyelination (dmy) rat exhibits hind limb ataxia and severe myelin breakdown in the central nervous system. The causative gene of dmy rats is the MRS2 magnesium transporter gene. Tribbles homolog 3 (Trib3) is a pseudokinase molecule that modifies certain signal pathways, and its expression is increased in response to various stresses. Here we sought to clarify the mechanism of myelin breakdown by focusing Trib3, which is remarkably up-regulated in dmy rats. The expression of Trib3 mRNA was significantly increased at 4, 5, 6, 7 and 8 weeks of age in the dmy rats, prior to the prominent myelin breakdown between 7 and 10 weeks of age. The expression level of Trib3 was increased concurrently with the progression of the clinical and pathological conditions in the dmy rats. Double immunofluorescence demonstrated that TRIB3 was mainly expressed in neurons and oligodendrocytes and localized in the Golgi apparatus. Our findings indicate that Trib3 may be associated with the pathogenic mechanism of dmy rats.
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Role of Uric Acid Metabolism-Related Inflammation in the Pathogenesis of Metabolic Syndrome Components Such as Atherosclerosis and Nonalcoholic Steatohepatitis. Mediators Inflamm 2016; 2016:8603164. [PMID: 28070145 PMCID: PMC5192336 DOI: 10.1155/2016/8603164] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 11/03/2016] [Accepted: 11/15/2016] [Indexed: 02/07/2023] Open
Abstract
Uric acid (UA) is the end product of purine metabolism and can reportedly act as an antioxidant. However, recently, numerous clinical and basic research approaches have revealed close associations of hyperuricemia with several disorders, particularly those comprising the metabolic syndrome. In this review, we first outline the two molecular mechanisms underlying inflammation occurrence in relation to UA metabolism; one is inflammasome activation by UA crystallization and the other involves superoxide free radicals generated by xanthine oxidase (XO). Importantly, recent studies have demonstrated the therapeutic or preventive effects of XO inhibitors against atherosclerosis and nonalcoholic steatohepatitis, which were not previously considered to be related, at least not directly, to hyperuricemia. Such beneficial effects of XO inhibitors have been reported for other organs including the kidneys and the heart. Thus, a major portion of this review focuses on the relationships between UA metabolism and the development of atherosclerosis, nonalcoholic steatohepatitis, and related disorders. Although further studies are necessary, XO inhibitors are a potentially novel strategy for reducing the risk of many forms of organ failure characteristic of the metabolic syndrome.
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Zhang W, Wu M, Kim T, Jariwala RH, Garvey WJ, Luo N, Kang M, Ma E, Tian L, Steverson D, Yang Q, Fu Y, Garvey WT. Skeletal Muscle TRIB3 Mediates Glucose Toxicity in Diabetes and High- Fat Diet-Induced Insulin Resistance. Diabetes 2016; 65:2380-91. [PMID: 27207527 PMCID: PMC4955990 DOI: 10.2337/db16-0154] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 04/26/2016] [Indexed: 01/05/2023]
Abstract
In the current study, we used muscle-specific TRIB3 overexpressing (MOE) and knockout (MKO) mice to determine whether TRIB3 mediates glucose-induced insulin resistance in diabetes and whether alterations in TRIB3 expression as a function of nutrient availability have a regulatory role in metabolism. In streptozotocin diabetic mice, TRIB3 MOE exacerbated, whereas MKO prevented, glucose-induced insulin resistance and impaired glucose oxidation and defects in insulin signal transduction compared with wild-type (WT) mice, indicating that glucose-induced insulin resistance was dependent on TRIB3. In response to a high-fat diet, TRIB3 MOE mice exhibited greater weight gain and worse insulin resistance in vivo compared with WT mice, coupled with decreased AKT phosphorylation, increased inflammation and oxidative stress, and upregulation of lipid metabolic genes coupled with downregulation of glucose metabolic genes in skeletal muscle. These effects were prevented in the TRIB3 MKO mice relative to WT mice. In conclusion, TRIB3 has a pathophysiological role in diabetes and a physiological role in metabolism. Glucose-induced insulin resistance and insulin resistance due to diet-induced obesity both depend on muscle TRIB3. Under physiological conditions, muscle TRIB3 also influences energy expenditure and substrate metabolism, indicating that the decrease and increase in muscle TRIB3 under fasting and nutrient excess, respectively, are critical for metabolic homeostasis.
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Affiliation(s)
- Wei Zhang
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - Mengrui Wu
- Department of Molecular & Cellular Pathology, University of Alabama at Birmingham, Birmingham, AL
| | - Teayoun Kim
- Department of Medicine-Endocrinology, Diabetes & Metabolism, University of Alabama at Birmingham, Birmingham, AL
| | - Ravi H Jariwala
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - W John Garvey
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - Nanlan Luo
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - Minsung Kang
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - Elizabeth Ma
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - Ling Tian
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - Dennis Steverson
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - Qinglin Yang
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - Yuchang Fu
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL
| | - W Timothy Garvey
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL Birmingham Veterans Affairs Medical Center, Birmingham, AL
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Mondal D, Mathur A, Chandra PK. Tripping on TRIB3 at the junction of health, metabolic dysfunction and cancer. Biochimie 2016; 124:34-52. [DOI: 10.1016/j.biochi.2016.02.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 02/04/2016] [Indexed: 12/16/2022]
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Li C, Lin Y, Luo R, Chen S, Wang F, Zheng P, Levi M, Yang T, Wang W. Intrarenal renin-angiotensin system mediates fatty acid-induced ER stress in the kidney. Am J Physiol Renal Physiol 2015; 310:F351-63. [PMID: 26672616 DOI: 10.1152/ajprenal.00223.2015] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 12/11/2015] [Indexed: 12/27/2022] Open
Abstract
Obesity-related kidney disease is related to caloric excess promoting deleterious cellular responses. Accumulation of saturated free fatty acids in tubular cells produces lipotoxicity involving significant cellular dysfunction and injury. The objectives of this study were to elucidate the role of renin-angiotensin system (RAS) activation in saturated fatty acid-induced endoplasmic reticulum (ER) stress in cultured human proximal tubule epithelial cells (HK2) and in mice fed with a high-fat diet. Treatment with saturated fatty acid palmitic acid (PA; 0.8 mM) for 24 h induced ER stress in HK2, leading to an unfolded protein response as reflected by increased expressions of the ER chaperone binding immunoglobulin protein (BiP) and proapoptotic transcription factor C/EBP homologous protein (CHOP) protein as evaluated by immunoblotting. PA treatment also induced increased protein expression of inositol requiring protein 1α (IRE1α), phosphorylated eukaryotic initiation factor-α (eIF2α), and activating transcription factor 4 (ATF4) as well as activation of caspase-3. PA treatment was associated with increased angiotensin II levels in cultured medium. The angiotensin II type 1 receptor (AT1R) blocker valsartan or renin inhibitor aliskiren dramatically suppressed PA-induced upregulation of BiP, CHOP, IRE1α, p-eIF2α, and ATF4 in HK2 cells. In contrast, valsartan or aliskiren did not prevent ER stress induced by tunicamycin. C57BL/6 mice fed with a high-fat diet for 14 wk exhibited increased protein expressions of BiP and CHOP compared with control mice, which were significantly attenuated by the valsartan treatment. Increased angiotensin II levels in serum and urine were observed in mice fed with a high-fat diet when compared with controls. It is suggested that the intrarenal RAS activation may play an important role in diabetic kidney injury via mediating ER stress induced by saturated fatty acid.
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Affiliation(s)
- Chunling Li
- Institute of Hypertension, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yu Lin
- Institute of Hypertension, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Renfei Luo
- Institute of Hypertension, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Shaoming Chen
- Department of Orthopedics, The 5th Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
| | - Feifei Wang
- Institute of Hypertension, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China;
| | - Peili Zheng
- Institute of Hypertension, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Moshe Levi
- Department of Medicine, Division of Hypertension and Renal Diseases, University of Colorado Denver, Aurora, Colorado; and
| | - Tianxin Yang
- Institute of Hypertension, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China; Department of Medicine, Division of Renal Diseases and Hypertension, University of Utah, Salt Lake City, Utah
| | - Weidong Wang
- Institute of Hypertension, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
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Sun XY, Qin HJ, Zhang Z, Xu Y, Yang XC, Zhao DM, Li XN, Sun LK. Valproate attenuates diabetic nephropathy through inhibition of endoplasmic reticulum stress‑induced apoptosis. Mol Med Rep 2015; 13:661-8. [PMID: 26647757 PMCID: PMC4686073 DOI: 10.3892/mmr.2015.4580] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 10/06/2015] [Indexed: 12/21/2022] Open
Abstract
Previous studies have suggested that endoplasmic reticulum stress (ERS) is one of the mechanisms responsible for the pathogenesis of diabetic nephropathy (DN). Histone acetylation modification can regulate the transcription of genes and is involved in the regulation of ERS. Valproate (VPA), a nonselective histone deacetylase inhibitor, has been reported to have a protective role in kidney tissue injury, however, whether VPA can prevent DN remains to be elucidated. In the present study, it was found that VPA increases the expression of glucose-regulated protein (GRP78) and reduces the protein expression of C/EBP-homologous protein (CHOP), growth arrest and DNA-damage-inducible gene 153 and caspase-12 in a rat model of DN. VPA can reduce renal cell apoptosis and alleviate proteinuria and alterations in serum creatinine. VPA also upregulates the acetylation level of histone H4 in the promoter of GRP78 and downregulates the acetylation level of histone H4 in the promoter of CHOP. Collectively, the data indicate that VPA can relieve ERS and reduce renal cell apoptosis, and thus attenuate renal injury in a rat model of DN by regulating the acetylation level of histone H4 in ERS-associated protein promoters.
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Affiliation(s)
- Xin-Yi Sun
- Department of Pathophysiology, Basic College of Medicine, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Han-Jiao Qin
- Department of Endocrinology and Metabolism, First Clinical Hospital of Norman Bethune College of Medicine, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Ze Zhang
- Department of Clinical Medicine, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Ye Xu
- Department of Histology and Embryology, Medical Research Laboratory, Jilin Medical College, Changchun, Jilin 132013, P.R. China
| | - Xiao-Chun Yang
- Department of Pathophysiology, Basic College of Medicine, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Dong-Ming Zhao
- Department of Endocrinology and Metabolism, Affiliated Hospital of Beihua University, Changchun, Jilin 132011, P.R. China
| | - Xiao-Ning Li
- Department of Pathophysiology, Basic College of Medicine, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Lian-Kun Sun
- Department of Pathophysiology, Basic College of Medicine, Jilin University, Changchun, Jilin 130021, P.R. China
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Fan Y, Xiao W, Li Z, Li X, Chuang PY, Jim B, Zhang W, Wei C, Wang N, Jia W, Xiong H, Lee K, He JC. RTN1 mediates progression of kidney disease by inducing ER stress. Nat Commun 2015; 6:7841. [PMID: 26227493 PMCID: PMC4532799 DOI: 10.1038/ncomms8841] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 06/17/2015] [Indexed: 12/11/2022] Open
Abstract
Identification of new biomarkers and drug targets for chronic kidney disease (CKD) is required for the development of more effective therapy. Here we report an association between expression of reticulon 1 (RTN1) and severity of CKD. An isoform-specific increase in the expression of RTN1A is detected in the diseased kidneys from mice and humans, and correlates inversely with renal function in patients with diabetic nephropathy. RTN1 overexpression in renal cells induces ER stress and apoptosis, whereas RTN1 knockdown attenuates tunicamycin-induced and hyperglycaemia-induced ER stress and apoptosis. RTN1A interacts with PERK through its N-terminal and C-terminal domains, and mutation of these domains prevents this effect on ER stress. Knockdown of Rtn1a expression in vivo attenuates ER stress and renal fibrosis in mice with unilateral ureteral obstruction, and also attenuates ER stress, proteinuria, glomerular hypertrophy and mesangial expansion in diabetic mice. Together, these data indicate that RTN1A contributes to progression of kidney disease by inducing ER stress. ER stress is associated with the pathogenesis of chronic kidney disease (CKD) and new CKD therapies are needed. Here the authors show that expression of Rtn1 can control severity of renal disease and that inhibition of its expression can attenuate ER stress and CKD.
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Affiliation(s)
- Ying Fan
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA.,Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Wenzhen Xiao
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA.,Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Zhengzhe Li
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Xuezhu Li
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Peter Y Chuang
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Belinda Jim
- Division of Nephrology, Department of Medicine, Jacobi Medical Center, Albert Einstein College of Medicine, Bronx, New York 10461, USA
| | - Weijia Zhang
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Chengguo Wei
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - Niansong Wang
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Weiping Jia
- Department of Nephrology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Huabao Xiong
- Immunology Institute, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, 10029, USA
| | - Kyung Lee
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
| | - John C He
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York 10029, USA
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Ha TS, Park HY, Seong SB, Ahn HY. Angiotensin II induces endoplasmic reticulum stress in podocyte, which would be further augmented by PI3-kinase inhibition. Clin Hypertens 2015; 21:13. [PMID: 26893923 PMCID: PMC4750790 DOI: 10.1186/s40885-015-0018-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 03/10/2015] [Indexed: 02/06/2023] Open
Abstract
INTRODUCTION Angiotensin II (Ang II) contributes to the pathological process of vascular structures, including renal glomeruli by hemodynamic and nonhemodynamic direct effects. On renal effects, Ang II plays an important role in the development of proteinuria and glomerulosclerosis by the modification of podocyte molecules and cell survival. In the present study, we investigated the effect of Ang II on endoplasmic reticulum (ER) stress in podocytes. METHODS We cultured mouse podocytes with increasing doses of Ang II and evaluated ER stress markers by Western blotting. RESULTS Ang II increased Bip protein, an ER chaperone, in a dose-dependent manner at 24 h, which was ameliorated by losartan, an angiotensin II type 1 receptor antagonist. Ang II also increased ER stress markers, such as phospho-PERK, phospho-eIF2α, and ATF4 proteins of podocyte, significantly in a dose-dependent manner at 24 h. Increased phospho-PERK and ATF4 proteins were further augmented by phosphoinositide 3 (PI3)-kinase inhibitor, LY294002, which suggested that Ang II could induce podocyte ER stress of PERK-eIF2α-ATF4 axis via PI3-kinase pathway. DISCUSSION These studies suggest that Ang II could induce podocyte ER stress of PERK-eIF2α-ATF4 axis via PI3-kinase pathway, which would contribute to the development of podocyte injury induced by Ang II, and the augmentation of PI3-kinase would be a therapeutic target.
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Affiliation(s)
- Tae-Sun Ha
- Department of Pediatrics, College of Medicine, Chungbuk National University, 1 Chungdae-ro, Seowon-gu, Cheongju, 361-240 South Korea
| | - Hye-Young Park
- Department of Pediatrics, College of Medicine, Chungbuk National University, 1 Chungdae-ro, Seowon-gu, Cheongju, 361-240 South Korea
| | - Su-Bin Seong
- Department of Pediatrics, College of Medicine, Chungbuk National University, 1 Chungdae-ro, Seowon-gu, Cheongju, 361-240 South Korea
| | - Hee Yul Ahn
- Department of Pharmacology, College of Medicine, Chungbuk National University, 1 Chungdae-ro, Seowon-gu, Cheongju, 361-240 South Korea
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Cheng WP, Wang BW, Lo HM, Shyu KG. Mechanical Stretch Induces Apoptosis Regulator TRB3 in Cultured Cardiomyocytes and Volume-Overloaded Heart. PLoS One 2015; 10:e0123235. [PMID: 25898323 PMCID: PMC4405267 DOI: 10.1371/journal.pone.0123235] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/17/2015] [Indexed: 01/28/2023] Open
Abstract
The expression of TRB3 (tribbles 3), an apoptosis regulated gene, increases during endoplasmic reticulum (ER) stress. How mechanical stress affects the regulation of TRB3 in cardiomyocytes during apoptosis is not fully understood. An in vivo model of aorta-caval shunt in adult rats demonstrated the increased TRB3 protein expression in the myocardium. The tumor necrosis factor-alpha (TNF-α) antagonist etanercept reversed the TRB3 protein expression and cardiomyocyte apoptosis induced by AV shunt. An in vitro model of cyclic stretch in neonatal rats was also used to investigate TRB3 expression. We hypothesized that cardiomyocyte apoptosis induced by cyclic stretch is TRB3 dependent. Neonatal rat cardiomyocytes grown on a flexible membrane base were stretched by vacuum to 20% of maximum elongation, at 60 cycles/min. Cyclic stretch significantly increased TRB3 protein and mRNA expression. Addition of c-jun N-terminal kinase (JNK) inhibitor SP600125, TNF-α antibody and etanercept 30 min before stretch reversed the induction of TRB3 protein induced by stretch. Cyclic stretch induced the DNA-binding activity of growth arrest and DNA damaged inducible gene-153 (GADD153) by electrophoretic mobility shift assay. SP600125, JNK siRNA, TNF-α antibody and etanercept abolished the binding activity induced by stretch. TRB3 promoter activity was enhanced by stretch and TRB3-mut plasmid, SP600125, TNF-α antibody and etanercept attenuated TRB3 promoter activity induced by stretch. Exogenous administration of TNF-α recombinant protein to the non-stretched cardiomyocytes increased TRB3 protein expression similar to that seen after stretch. Cyclic stretch induced cardiomyocyte apoptosis is inhibited by TRB3 siRNA and etanercept. The stretch-induced TRB3 is mediated by TNF-α、JNK and GADD153 pathway. These results indicate that TRB3 plays an important role in stretch-induced cardiomyocyte apoptosis.
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Affiliation(s)
- Wen-Pin Cheng
- Department of Medical Education and Research, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Bao-Wei Wang
- Department of Medical Education and Research, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Huey-Ming Lo
- Division of Cardiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
- School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan
| | - Kou-Gi Shyu
- Division of Cardiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- * E-mail:
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Cunard R. Endoplasmic Reticulum Stress in the Diabetic Kidney, the Good, the Bad and the Ugly. J Clin Med 2015; 4:715-40. [PMID: 26239352 PMCID: PMC4470163 DOI: 10.3390/jcm4040715] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 03/31/2015] [Indexed: 02/06/2023] Open
Abstract
Diabetic kidney disease is the leading worldwide cause of end stage kidney disease and a growing public health challenge. The diabetic kidney is exposed to many environmental stressors and each cell type has developed intricate signaling systems designed to restore optimal cellular function. The unfolded protein response (UPR) is a homeostatic pathway that regulates endoplasmic reticulum (ER) membrane structure and secretory function. Studies suggest that the UPR is activated in the diabetic kidney to restore normal ER function and viability. However, when the cell is continuously stressed in an environment that lies outside of its normal physiological range, then the UPR is known as the ER stress response. The UPR reduces protein synthesis, augments the ER folding capacity and downregulates mRNA expression of genes by multiple pathways. Aberrant activation of ER stress can also induce inflammation and cellular apoptosis, and modify signaling of protective processes such as autophagy and mTORC activation. The following review will discuss our current understanding of ER stress in the diabetic kidney and explore novel means of modulating ER stress and its interacting signaling cascades with the overall goal of identifying therapeutic strategies that will improve outcomes in diabetic nephropathy.
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Affiliation(s)
- Robyn Cunard
- Research Service and Division of Nephrology-Hypertension, Veterans Affairs San Diego Healthcare System, Veterans Medical Research Foundation, San Diego, CA 92161, USA.
- Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA.
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Sheedy C, Mooney C, Jimenez-Mateos E, Sanz-Rodriguez A, Langa E, Mooney C, Engel T. De-repression of myelin-regulating gene expression after status epilepticus in mice lacking the C/EBP homologous protein CHOP. INTERNATIONAL JOURNAL OF PHYSIOLOGY, PATHOPHYSIOLOGY AND PHARMACOLOGY 2014; 6:185-198. [PMID: 25755840 PMCID: PMC4348710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 12/20/2014] [Indexed: 06/04/2023]
Abstract
The C/EBP homologous protein CHOP is normally present at low levels in cells but increases rapidly after insults such as DNA damage or endoplasmatic reticulum stress where it contributes to cellular homeostasis and apoptosis. By forming heterodimers with other transcription factors, CHOP can either act as a dominant-negative regulator of gene expression or to induce the expression of target genes. Recent work demonstrated that seizure-induced hippocampal damage is significantly worse in mice lacking CHOP and these animals go on to develop an aggravated epileptic phenotype. To identify novel CHOP-controlled target genes which potentially influence the epileptic phenotype, we performed a bioinformatics analysis of tissue microarrays from chop-deficient mice after prolonged seizures. GO analysis revealed genes associated with biological membranes were prominent among those in the chop-deficient array dataset and we identified myelin-associated genes to be particularly de-repressed. These data suggest CHOP might act as an inhibitor of myelin-associated processes in the brain and could be targeted to influence axonal regeneration or reorganisation.
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Affiliation(s)
- Caroline Sheedy
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland Dublin, Ireland
| | - Claire Mooney
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland Dublin, Ireland
| | - Eva Jimenez-Mateos
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland Dublin, Ireland
| | - Amaya Sanz-Rodriguez
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland Dublin, Ireland
| | - Elena Langa
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland Dublin, Ireland
| | - Catherine Mooney
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland Dublin, Ireland
| | - Tobias Engel
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland Dublin, Ireland
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Sun X, Lin Y, Huang Q, Shi J, Qiu L, Kang M, Chen Y, Fang C, Ye T, Dong S. Di(2-ethylhexyl) phthalate-induced apoptosis in rat INS-1 cells is dependent on activation of endoplasmic reticulum stress and suppression of antioxidant protection. J Cell Mol Med 2014; 19:581-94. [PMID: 25418486 PMCID: PMC4369815 DOI: 10.1111/jcmm.12409] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 07/24/2014] [Indexed: 01/09/2023] Open
Abstract
Di(2-ethylhexyl) phthalate (DEHP) is used as plasticizer and is ubiquitously found in the environment. Exposure to DEHP has been linked to an increased incidence of type 2 diabetes. Pancreatic β-cell dysfunction is a hallmark of type 2 diabetes; however, it is unknown whether DEHP exposure contributes to this risk. Here, we aimed to investigate the cytotoxic effects of DEHP on INS-1 cells and to further explore the related underlying mechanisms. INS-1 cells were exposed to 0, 5, 25, 125 or 625 μM DEHP for 24 hrs. Cell viability, glucose-stimulated insulin secretion, reactive oxygen species (ROS) generation, cellular antioxidant response, Ca(2+) homoeostasis and the levels of genes and proteins involved in endoplasmic reticulum (ER) stress were measured. The results showed that DEHP decreased insulin secretion and content and induced apoptosis in INS-1 cells in a dose-dependent manner. Furthermore, ROS generation was increased and Nrf2-dependent antioxidant defence protection was dysregulated in INS-1 cells after DEHP exposure. Most importantly, DEHP effectively depleted ER Ca(2+) and triggered the ER stress response as demonstrated by the elevated transcription and translation of the ER chaperone GRP78 and GRP94, the increased phosphorylation of protein kinase R-like endoplasmic reticulum kinase (PERK) and its downstream substrate eukaryotic translation initiation factor 2α (eIF2α), as well as the increased levels of activating transcription factor 4 (ATF4) and C/EBP homologous protein (CHOP). Taken together, DEHP exerted toxic effects on INS-1 cells by inducing apoptosis, which is dependent on the activation of the PERK-ATF4-CHOP ER stress signalling pathway and the suppression of Nrf2-dependent antioxidant protection.
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Affiliation(s)
- Xia Sun
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
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Zhang W, Yang Z, Li X, Wen J, Zhang H, Wang S, Wang X, Zhou H, Fang W, Qin L, Su Q. The functional Q84R polymorphism of TRIB3 gene is associated with diabetic nephropathy in Chinese type 2 diabetic patients. Gene 2014; 555:357-61. [PMID: 25447894 DOI: 10.1016/j.gene.2014.11.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 10/03/2014] [Accepted: 11/13/2014] [Indexed: 12/11/2022]
Abstract
Increased oxidative stress and circulating free fatty acids (FFA) has been suggested to involve in the pathogenesis of diabetic nephropathy. TRIB3 can inhibit FFA and reactive oxygen species (ROS) stimulated podocyte production of MCP-1. Smoking increases the production of reactive oxygen species, which accelerates oxidative stress under hyperglycemia. To determine whether the Q84R polymorphism (rs2295490), alone or in combination with smoking, contributes to the development of diabetic nephropathy, a case-control study was performed in 812 Chinese patients with type 2 diabetes. Among patients, 214 had diabetic nephropathy with microalbuminuria (n=156) or overt albuminuria (n=58), and 598 did not show either of these symptoms but had diabetes for ≥10 years and were not undergoing antihypertension treatment. After adjustment for confounders, TRIB3 single-nucleotide polymorphism rs2295490 was associated with DN (OR 1.318, 95% CI 1.075, 1.653, p=0.017); smoking was also an independent risk factor for diabetic nephropathy (1.42 [1.25-2.04], p<0.001). In addition, we identified possible synergistic effects; i.e., the high-risk group (smokers with the AG+GG genotype) showed 2.13 times higher risk (1.51-3.96, p<0.001) of diabetic nephropathy than the low-risk group (nonsmokers with the AA genotype) in a multiple logistic regression analysis controlled for the confounders, but no departure from additivity was found. Our results indicate that smoking and the TRIB3 G-allele is associated with an increased risk of diabetic nephropathy, which supports the hypothesis that oxidative stress contributes to the development of diabetic nephropathy.
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Affiliation(s)
- Weiwei Zhang
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Zhen Yang
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Xiaoyong Li
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Jie Wen
- Institute of Endocrinology and Diabetology at Fudan University, Huashan Hospital, Fudan University, Shanghai, China
| | - Hongmei Zhang
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Suijun Wang
- Department of Endocrinology, Clinical Geriatric Medicine, Henan Provincial People's Hospital, Zhengzhou, China
| | - Xuanchun Wang
- Institute of Endocrinology and Diabetology at Fudan University, Huashan Hospital, Fudan University, Shanghai, China
| | - Houguang Zhou
- Department of Geriatrics, Huashan Hospital, Fudan University, Shanghai, China
| | - Wenjun Fang
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Li Qin
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Qing Su
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China.
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Wang W, Sun A, Lv W, Cheng J, Lv S, Liu X, Guan G, Liu G. TRB3, up-regulated in kidneys of rats with type1 diabetes, mediates extracellular matrix accumulation in vivo and in vitro. Diabetes Res Clin Pract 2014; 106:101-9. [PMID: 25112920 DOI: 10.1016/j.diabres.2014.07.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 05/23/2014] [Accepted: 07/20/2014] [Indexed: 12/17/2022]
Abstract
AIMS Fibrosis is the final disorder of most chronic kidney disease including diabetic nephropathy (DN), but the mechanisms are not fully understood. The present study aims to determine whether TRB3 participates in fibrogenesis in DN. METHODS Type1 diabetes was induced in male Wistar rats via intraperitoneal injection of streptozotocin (STZ). The expression of TRB3 and extracellular matrix (ECM) protein collagen I and fibronectin was investigated in kidneys of rats with diabetes and NRK-52E cells (a rat proximal tubular cell line) stimulated with albumin-overload. Rats without diabetes and NRK-52E cells without albumin stimulation served as control. Then gene silencing was used to study whether TRB3 participated in accumulation of collagen I and fibronectin in vivo and in vitro. RESULTS TRB3 is up-regulated in renal tubules of kidneys of rats with diabetes, especially proximal tubules. Albumin-overload can augments TRB3 expression and increase collagen I and fibronectin secretion in NRK-52E cells. Importantly, silencing of TRB3 alleviates collagen I and fibronectin accumulation in kidneys of rats with diabetes and NRK-52E cells induced by albumin-overload. CONCLUSIONS TRB3 mediates ECM accumulation in kidneys of rats with STZ-induced type1 diabetes and proximal tubular cells induced by albumin-overload, suggesting a potential target for treatment of DN.
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Affiliation(s)
- Weiwei Wang
- Nephrology Research Institute of Shandong University, The Second Hospital of Shandong University, Ji'nan, Shandong Province, China
| | - Aili Sun
- Department of Endocrinology, The Second Hospital of Shandong University, Ji'nan, Shandong Province, China
| | - Wei Lv
- Department of Nephrology, Yantai Yuhuangding Hospital, Yantai, Shandong Province, China
| | - Jing Cheng
- Nephrology Research Institute of Shandong University, The Second Hospital of Shandong University, Ji'nan, Shandong Province, China
| | - Shasha Lv
- Nephrology Research Institute of Shandong University, The Second Hospital of Shandong University, Ji'nan, Shandong Province, China
| | - Xiangchun Liu
- Nephrology Research Institute of Shandong University, The Second Hospital of Shandong University, Ji'nan, Shandong Province, China
| | - Guangju Guan
- Nephrology Research Institute of Shandong University, The Second Hospital of Shandong University, Ji'nan, Shandong Province, China.
| | - Gang Liu
- Nephrology Research Institute of Shandong University, The Second Hospital of Shandong University, Ji'nan, Shandong Province, China.
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Li Y, Guo Y, Tang J, Jiang J, Chen Z. New insights into the roles of CHOP-induced apoptosis in ER stress. Acta Biochim Biophys Sin (Shanghai) 2014; 46:629-40. [PMID: 25016584 DOI: 10.1093/abbs/gmu048] [Citation(s) in RCA: 322] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Endoplasmic reticulum stress (ER stress) is triggered due to a loss of homeostasis in the ER, resulting in accumulation of misfolded proteins in the ER lumen. ER stress activates a series of adaptive mechanisms known as the unfolded protein response. Perturbation of the ER is a powerful inducer of the transcription factor C/EBP homologous protein (CHOP). Although it has been proved that excessive or adverse stress to the ER triggers apoptosis, the specific mechanisms underlying these processes induced by CHOP remain unclear. By now, CHOP-induced apoptosis in ER stress has been implicated in numerous human diseases, such as neurodegenerative diseases, diabetes, ischemic diseases, tumor, and so on. In this review, we summarized the current understanding of the roles of CHOP in the development of several diseases from the laboratory to the clinic.
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Tribbles 3 regulates the fibrosis cytokine TGF- β 1 through ERK1/2-MAPK signaling pathway in diabetic nephropathy. J Immunol Res 2014; 2014:240396. [PMID: 25133193 PMCID: PMC4124808 DOI: 10.1155/2014/240396] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 05/21/2014] [Accepted: 06/03/2014] [Indexed: 01/14/2023] Open
Abstract
To reveal the expression and possible role of tribbles homolog 3 (TRB3) in the incidence of type 2 diabetic nephropathy, we used immunohistochemistry, real-time quantitative PCR, western blot analysis, and enzyme-linked immunosorbent assay (ELISA) to study the expression of TRB3, extracellular signal-regulated kinase 1/2 mitogen-activated protein kinase (ERK1/2 MAPK), transforming growth factor β1 (TGF-β1), and collagen type IV in kidneys of db/db diabetic mice and in murine renal mesangial cells stimulated with high glucose. The expression of TRB3, TGF-β1, and collagen type IV was increased in kidneys of db/db diabetic mice. TGF-β1 and collagen type IV regulated by high glucose through ERK1/2 MAPK were downregulated by silencing TRB3 in renal mesangial cells. TRB3 may be involved in diabetic nephropathy by regulating the fibrosis cytokine TGF-β1 and collagen type IV through the ERK1/2 MAPK signaling pathway.
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Hu LW, Yen JH, Shen YT, Wu KY, Wu MJ. Luteolin modulates 6-hydroxydopamine-induced transcriptional changes of stress response pathways in PC12 cells. PLoS One 2014; 9:e97880. [PMID: 24846311 PMCID: PMC4028259 DOI: 10.1371/journal.pone.0097880] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 04/25/2014] [Indexed: 01/08/2023] Open
Abstract
The neurotoxin 6-hydroxydopamine (6-OHDA), which causes transcriptional changes associated with oxidative and proteotoxic stress, has been widely used to generate an experimental model of Parkinson's disease. The food-derived compound luteolin has multi-target actions including antioxidant, anti-inflammatory and neurotrophic activities. The aim of this study is to investigate how luteolin affects 6-OHDA-mediated stress response pathways. The results showed that when PC12 cells were pre-treated with luteolin (20 µM) 30 min prior to 6-OHDA (100 µM) exposure, 6-OHDA-induced ROS overproduction, cytotoxicity, caspase-3 activation, and mRNA expression of BIM, TRB3 and GADD34 were significantly attenuated. Moreover, 6-OHDA-mediated cell cycle arrest and transcription of p53 target genes, p21, GADD45α and PUMA, were reduced by luteolin. Luteolin also significantly down-regulated 6-OHDA-mediated unfolded protein response (UPR), leading to decreases in phospho-eIF2α, ATF4, GRP78 and CHOP. In addition, luteolin attenuated 6-OHDA-induced Nrf2-mediated HO-1 and GCLC. Taken together, these results suggest that diminishing intracellular ROS formation and down-regulation of p53, UPR and Nrf2-ARE pathways may be involved in the neuroprotective effect of luteolin.
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Affiliation(s)
- Ling-Wei Hu
- Department of Biotechnology, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Jui-Hung Yen
- Department of Molecular Biology and Human Genetics, Tzu Chi University, Hualien, Taiwan
| | - Yi-Ting Shen
- Department of Pharmacy, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Kuan-Yi Wu
- Department of Biotechnology, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Ming-Jiuan Wu
- Department of Biotechnology, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
- * E-mail:
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Beukes N, Levendal RA, Frost CL. Selected terpenoids from medicinal plants modulate endoplasmic reticulum stress in metabolic disorders. J Pharm Pharmacol 2014; 66:1505-25. [DOI: 10.1111/jphp.12267] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 03/16/2014] [Indexed: 12/20/2022]
Abstract
Abstract
Objectives
The majority of research performed on cellular stress and apoptosis focuses on mitochondrial dysfunction; however, the importance of the endoplasmic reticulum dysfunction and the link to metabolic diseases has gained a substantial interest. This review focuses on the potential of terpenoids to influence endoplasmic reticulum stress and the possible role terpenoids play as the treatment of metabolic diseases.
Key findings
Metabolic diseases develop as a result of a cascade of cellular pathways. In most cases, cells are able to compensate for the disruption of the cellular homeostasis although the initiation of response pathways; however, chronic stress initiates apoptotic pathways. This reviewed (1) showed the importance of phytoterpenoids to influence endoplasmic reticulum (ER) stress and homeostasis, (2) showed how regulating ER stress affect the cell survival and death, and (3) highlighted some examples of how the progression of metabolic diseases can be influenced by ER.
Summary
Due to the substantial number of terpenoids that have been identified in literature, this review gave examples of 21 terpenoids that have been documented to have an effect on the different proteins associated with ER stress, how these plant terpenoids influence ER dysfunction and metabolic diseases such as diabetes, cancer, liver, and neurological diseases and parasitic infections.
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Affiliation(s)
- Natasha Beukes
- Department of Biochemistry and Microbiology, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa
| | - Ruby-Ann Levendal
- Department of Biochemistry and Microbiology, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa
| | - Carminita L Frost
- Department of Biochemistry and Microbiology, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa
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Sun W, Miao X, Zhou S, Zhang L, Epstein PN, Mellen N, Zheng Y, Fu Y, Wang Y, Cai L. Zinc rescue of Akt2 gene deletion-linked murine cardiac dysfunction and pathological changes is metallothionein-dependent. J Mol Cell Cardiol 2014; 74:88-97. [PMID: 24819347 DOI: 10.1016/j.yjmcc.2014.04.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 04/23/2014] [Accepted: 04/30/2014] [Indexed: 10/25/2022]
Abstract
We have demonstrated that zinc supplementation provides cardiac protection from diabetes in mice, but its underlying mechanism remains unclear. Since zinc mimics the function of insulin, it may provide benefit to the heart via stimulating Akt-mediated glucose metabolism. Akt2 plays an important role in cardiac glucose metabolism and mice with Akt2 gene deletion (Akt2-KO) exhibit a type 2 diabetes phenotype; therefore, we assumed that no cardiac protection by zinc supplementation from diabetes would be observed in Akt2-KO mice. Surprisingly, despite Akt2 gene deletion, zinc supplementation provided protection against cardiac dysfunction and other pathological changes in Akt2-KO mice, which were accompanied by significant decreases in Akt and GSK-3β phosphorylation. Correspondingly, glycogen synthase phosphorylation and hexokinase II and PGC-1α expression, all involved in the regulation of glucose metabolism, were significantly altered in diabetic hearts, along with a significantly increased expression of Akt negative regulators: PTEN, PTP1B, and TRB3. All these molecular, pathological, and functional changes were significantly prevented by 3-month zinc supplementation. Furthermore, the stimulation of Akt-mediated glucose metabolic kinases or enzymes by zinc treatment was metallothionein-dependent since it could not be observed in metallothionein-knockout mice. These results suggest that zinc preserves cardiac function and structure in Akt2-KO mice presumably due to its insulin mimetic effect on cardiac glucose-metabolism. The cardioprotective effects of zinc are metallothionein-dependent. This is very important since zinc supplementation may be required for patients with Akt2 gene deficiency or insulin resistance.
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Affiliation(s)
- Weixia Sun
- The First Hospital of Jilin University, Jilin 130021, China; Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, KY 40202, USA
| | - Xiao Miao
- Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, KY 40202, USA; The Second Hospital of Jilin University, Jilin 130041, China
| | - Shanshan Zhou
- The First Hospital of Jilin University, Jilin 130021, China; Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, KY 40202, USA
| | - Li Zhang
- The First Hospital of Jilin University, Jilin 130021, China
| | - Paul N Epstein
- Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, KY 40202, USA; Department of Pharmacology and Toxicology, University of Louisville, KY 40202, USA
| | - Nicholas Mellen
- Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, KY 40202, USA
| | - Yang Zheng
- The First Hospital of Jilin University, Jilin 130021, China
| | - Yaowen Fu
- The First Hospital of Jilin University, Jilin 130021, China
| | - Yuehui Wang
- The First Hospital of Jilin University, Jilin 130021, China.
| | - Lu Cai
- Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, KY 40202, USA; Department of Pharmacology and Toxicology, University of Louisville, KY 40202, USA.
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Abstract
Cells use an exquisite network of mechanisms to maintain the integrity and functionality of their protein components. In the endoplasmic reticulum (ER), these networks of protein homeostasis--referred to as proteostasis--regulate protein synthesis, folding and degradation via the unfolded protein response (UPR) pathway. The UPR pathway has two components: the adaptive UPR pathway, which predominantly maintains the ER function or ER proteostasis, and the apoptotic UPR pathway, which eliminates dysfunctional cells that have been subject to long-term or severe ER stress. Dysregulation of the UPR pathway often occurs in glomerular or tubulointerstitial cells under a pathogenic microenvironment, such as oxidative stress, glycative stress or hypoxia. A defective UPR is highly deleterious to renal cell function and viability and is thereby implicated in the pathophysiology of various kidney diseases. Accumulating evidence provides a link between the UPR pathway and mitochondrial structure and function, indicating the important role of ER proteostasis in the maintenance of mitochondrial homeostasis. Restoration of normal proteostasis, therefore, holds promise in protecting the kidney from pathogenic stresses as well as ageing. This Review is focused on the role of the ER stress and UPR pathway in the maintenance of ER proteostasis, and highlights the involvement of the derangement of ER proteostasis and ER stress in various pathogenic stress signals in the kidney.
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