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Sirizi MAG, Esmailidehaj M, Mohamadi-Zarch SM, Yadeghari M, Azizian H. Cardioprotective effects of GPER agonist in ovariectomized diabetic rats: reversing ER stress and structural changes. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03438-4. [PMID: 39298018 DOI: 10.1007/s00210-024-03438-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2024] [Accepted: 09/06/2024] [Indexed: 09/21/2024]
Abstract
The incidence of diabetic cardiomyopathy (DCM) significantly increases in postmenopausal women, suggesting protective roles of estrogen. Excessive endoplasmic reticulum (ER) stress alters myocardial structure, which plays a crucial role in DCM. The G protein-coupled estrogen receptor (GPER) has been demonstrated to have cardioprotective effects, but it remains unclear whether these effects involve the amelioration of structural changes induced by ER stress. The objective of this study was to determine whether GPER can prevent cardiac structural changes by attenuating ER stress. Female ovariectomized (OVX) rats were divided into three groups: OVX, OVX + T2D, and OVX + T2D + G1. T2D was induced by a high-fat diet, and streptozotocin and G1, a GPER agonist, were administered for 6 weeks. Finally, histological changes of the myocardium were examined and the expression of sarcoplasmic reticulum calcium ATPase (SERCA2α), GRP78 as an ER stress marker, and apoptotic signalings were determined by Western blot. We observed that the induction of T2D resulted in an increased cardiac weight index, left ventricular wall thickness, and myocyte diameter. However, GPER activation reversed these changes. T2D increased cardiac protein levels of GRP78, caspase-12, and Bax, while decreasing levels of SERCA2α and Bcl-2. Nevertheless, GPER activation reduced the expression of GRP78 in OVX + T2D rats. Furthermore, GPER activation significantly reduced cardiac caspase-12 and Bax levels and increased SERCA2α and Bcl-2 expression. In conclusion, our data suggest that GPER activation ameliorates DCM by inhibiting ER stress-induced cardiac structural changes. These findings provide a new potential target for therapeutic intervention and drug discovery specifically tailored for postmenopausal diabetic women.
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Affiliation(s)
- Mohammad Amin Ghaffari Sirizi
- Yazd Neuroendocrine Research Center, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Mansour Esmailidehaj
- Yazd Neuroendocrine Research Center, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Seyed-Mahdi Mohamadi-Zarch
- Yazd Neuroendocrine Research Center, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Maryam Yadeghari
- Yazd Neuroendocrine Research Center, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
- Department of Anatomy and Cell BioloAAgy, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Hossein Azizian
- Yazd Neuroendocrine Research Center, School of Medicine, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran.
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Dobson JR, Jacobson DA. Disrupted Endoplasmic Reticulum Ca 2+ Handling: A Harβinger of β-Cell Failure. BIOLOGY 2024; 13:379. [PMID: 38927260 PMCID: PMC11200644 DOI: 10.3390/biology13060379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 05/17/2024] [Accepted: 05/17/2024] [Indexed: 06/28/2024]
Abstract
The β-cell workload increases in the setting of insulin resistance and reduced β-cell mass, which occurs in type 2 and type 1 diabetes, respectively. The prolonged elevation of insulin production and secretion during the pathogenesis of diabetes results in β-cell ER stress. The depletion of β-cell Ca2+ER during ER stress activates the unfolded protein response, leading to β-cell dysfunction. Ca2+ER is involved in many pathways that are critical to β-cell function, such as protein processing, tuning organelle and cytosolic Ca2+ handling, and modulating lipid homeostasis. Mutations that promote β-cell ER stress and deplete Ca2+ER stores are associated with or cause diabetes (e.g., mutations in ryanodine receptors and insulin). Thus, improving β-cell Ca2+ER handling and reducing ER stress under diabetogenic conditions could preserve β-cell function and delay or prevent the onset of diabetes. This review focuses on how mechanisms that control β-cell Ca2+ER are perturbed during the pathogenesis of diabetes and contribute to β-cell failure.
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Affiliation(s)
| | - David A. Jacobson
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37232, USA;
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Xu Y, Zhao H, Wang F, Xu S, Wang C, Li Y, Wang Y, Nong H, Zhang J, Cao Z, Chen C, Li J. SERCA2 protects against cisplatin-induced damage of auditory cells: Possible relation with alleviation of ER stress. Toxicol Appl Pharmacol 2024; 486:116947. [PMID: 38688426 DOI: 10.1016/j.taap.2024.116947] [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: 02/04/2024] [Revised: 04/10/2024] [Accepted: 04/25/2024] [Indexed: 05/02/2024]
Abstract
AIMS SERCA2, one of the P-type pumps encoded by gene ATP2A2, is the only calcium reflux channel of the endoplasmic reticulum (ER) and participates in maintaining calcium homeostasis. The present study was designed to explore SERCA2 expression pattern in auditory hair cells and the possible mechanism underlying the effects of SERCA2 on cisplatin-induced ototoxicity. MAIN METHODS The SERCA2 expression pattern in cochlea hair cells and HEI-OC1 cells was measured by Western blot (WB) and immunofluorescence staining. The apoptosis and its related factors were detected by TUNEL assay and WB. The expression levels of ER stress-related factors, ATF6, PERK, IRE1α, and GRP78, were measured via WB. As for the determination of SERCA2 overexpression and knockdown, plasmids and lentiviral vectors were constructed, respectively. KEY FINDINGS We found that SERCA2 was highly expressed in cochlea hair cells and HEI-OC1 cells. Of note, the level of SERCA2 expression in neonatal mice was remarkably higher than that in adult mice. Under the exposure of 30 μM cisplatin, SERCA2 was down-regulated significantly compared with the control group. In addition, cisplatin administration triggered the occurrence of ER stress and apoptosis. Those events were reversed by overexpressing SERCA2. On the contrary, SERCA2 knockdown could aggravate the above processes. SIGNIFICANCE The findings from the present study disclose, for the first time, that SERCA2 is abundantly expressed in cochlea hair cells, and the suppression of SERCA2 caused by cisplatin could trigger ER homeostasis disruption, thereby implying that SERCA2 might be a promising target to prevent cisplatin-induced cytotoxicity of hair cells.
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Affiliation(s)
- Yue Xu
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250021, China
| | - Hao Zhao
- Department of Otolaryngology-Head and Neck Surgery, People's Hospital, Peking University, Beijing 100000, China
| | - Fan Wang
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250021, China
| | - Shuai Xu
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250021, China
| | - Chen Wang
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250021, China
| | - Yanan Li
- Department of Otolaryngology-Head and Neck Surgery Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Yajie Wang
- Department of Otolaryngology-Head and Neck Surgery Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Huiming Nong
- Department of Otolaryngology-Head and Neck Surgery Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Junhong Zhang
- Department of Otolaryngology-Head and Neck Surgery Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Zhixin Cao
- Department of Pathology Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Chengfang Chen
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250021, China; Department of Otolaryngology-Head and Neck Surgery Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China.
| | - Jianfeng Li
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250021, China; Department of Otolaryngology-Head and Neck Surgery Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Provincial Key Laboratory of Otology, Jinan, Shandong 250021, China.
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Celli A, Pitchford M, Lu N, Mayes AE, Evans RL, Mauro TM. Restoring Endoplasmic Reticulum Calcium Stores in Aged Epidermis Improves the Epidermal Calcium Gradient and Enhances FLG Expression. J Invest Dermatol 2024; 144:1169-1172.e1. [PMID: 38036290 DOI: 10.1016/j.jid.2023.10.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/12/2023] [Accepted: 10/10/2023] [Indexed: 12/02/2023]
Affiliation(s)
- Anna Celli
- Dermatology Service, San Francisco VA Health Care System, San Francisco, California, USA; Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Northern California Institute for Research and Education, San Francisco, California, USA; Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California, USA
| | - Marquel Pitchford
- Dermatology Service, San Francisco VA Health Care System, San Francisco, California, USA; Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Northern California Institute for Research and Education, San Francisco, California, USA
| | - Nandou Lu
- Unilever R&D, Trumbull, Connecticut, USA
| | | | - Richard L Evans
- Unilever R&D Port Sunlight Laboratory, Bebington, United Kingdom
| | - Theodora M Mauro
- Dermatology Service, San Francisco VA Health Care System, San Francisco, California, USA; Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Northern California Institute for Research and Education, San Francisco, California, USA.
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Huang YP, Huang WW, Tsai KF, Shiao LR, Yang ZH, Tseng SY, Lin YH, Chen CY, Chan P, Leung YM. CDN1163, a SERCA activator, causes intracellular Ca 2+ leak, mitochondrial hyperpolarization and cell cycle arrest in mouse neuronal N2A cells. Neurotoxicology 2023; 98:9-15. [PMID: 37429421 DOI: 10.1016/j.neuro.2023.07.001] [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: 03/05/2023] [Revised: 06/11/2023] [Accepted: 07/07/2023] [Indexed: 07/12/2023]
Abstract
OBJECTIVE Activity or expression of sarcoplasmic/endoplasmic reticulum Ca2+ ATPase (SERCA) is diminished in some disease states such as cardiac failure and diabetes mellitus. A newly developed activator of SERCA, CDN1163, reportedly rescued or alleviated pathological conditions attributed to dysfunctional SERCA. We examined whether CDN1163 could relieve mouse neuronal N2A cell growth inhibition caused by cyclopiazonic acid (CPA, SERCA inhibitor). We also examined how CDN1163 affected cytosolic Ca2+, mitochondrial Ca2+ and mitochondrial membrane potential. METHODS Cell viability was measured by MTT assay and trypan blue exclusion test. Cytosolic Ca2+, mitochondrial Ca2+ and mitochondrial membrane potential were measured using fura 2, Rhod-2 and JC-1, respectively, as fluorescent probes. RESULTS CDN1163 (10 μM) itself suppressed cell proliferation, and did not alleviate CPA's inhibitory effect (and vice versa). Cell cycle was arrested at the G1 phase after CDN1163 treatment. CDN1163 treatment caused a slow yet persistent cytosolic [Ca2+] elevation partly due to Ca2+ release from an internal store other than the CPA-sensitive endoplasmic reticulum (ER). Treatment with CDN1163 for 3 h raised mitochondrial Ca2+ level and such increase was suppressed by MCU-i4 (an inhibitor of mitochondria Ca2+ uniporter, MCU), suggesting Ca2+ entered the mitochondrial matrix through MCU. Treatment of cells with CDN1163 up to 2 days resulted in mitochondrial hyperpolarization. CONCLUSION CDN1163 caused internal Ca2+ leak, cytosolic Ca2+ overload, mitochondrial Ca2+ elevation and hyperpolarization, cell cycle arrest and cell growth inhibition.
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Affiliation(s)
- Yi-Ping Huang
- Department of Physiology, China Medical University, Taichung 40402, Taiwan
| | - Wen-Wei Huang
- Department of Internal Medicine, Gastroenterology and Hepatology Section, An Nan Hospital, China Medical University, Tainan, Taiwan
| | - Kun-Feng Tsai
- Department of Internal Medicine, Gastroenterology and Hepatology Section, An Nan Hospital, China Medical University, Tainan, Taiwan; Department of Medical Sciences Industry, Chang Jung Christian University, Tainan, Taiwan
| | - Lian-Ru Shiao
- Department of Physiology, China Medical University, Taichung 40402, Taiwan
| | - Zih-He Yang
- Department of Physiology, China Medical University, Taichung 40402, Taiwan
| | - Shao-Yun Tseng
- Department of Physiology, China Medical University, Taichung 40402, Taiwan
| | - Yu-Hsien Lin
- Department of Physiology, China Medical University, Taichung 40402, Taiwan
| | - Cing-Yu Chen
- Department of Cosmetic Science, Providence University, Taichung, Taiwan; School of Pharmacy, China Medical University, Taichung, Taiwan
| | - Paul Chan
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Yuk-Man Leung
- Department of Physiology, China Medical University, Taichung 40402, Taiwan.
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Sinha S, Haque M, Lugova H, Kumar S. The Effect of Omega-3 Fatty Acids on Insulin Resistance. Life (Basel) 2023; 13:1322. [PMID: 37374105 PMCID: PMC10305526 DOI: 10.3390/life13061322] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 05/27/2023] [Accepted: 06/02/2023] [Indexed: 06/29/2023] Open
Abstract
Insulin resistance is a critical pathophysiological process in the onset and advancement of type 2 diabetes mellitus. It is well-recognized that alterations in the metabolism of lipids and aberrant fat buildup effectively trigger the development of resistance to insulin. Adjusting one's eating habits and managing weight appropriately are crucial for treating, controlling, and reducing the risk of T2DM because obesity and a lack of physical exercise are the primary factors responsible for the worldwide rise in T2DM. Omega-3 fatty acid is one of the polyunsaturated fatty acids (PUFA) that include long-chain omega-3 fatty acids such as eicosapentaenoic acid and docosahexaenoic acid, commonly found in fish oils. Omega-3 and omega-6 polyunsaturated fatty acids (PUFAs; 3 and 6 PUFAs) are essential for human health because they serve as metabolic precursors of eicosanoids, a class of signaling molecules that are essential for controlling a body's inflammation. Since humans are unable to produce any of the omega-3 or omega-6 PUFAs, they both constitute imperative nutritional ingredients. Long-standing concerns about long-chain omega-3 fatty acids' impact on diabetes management have been supported by experimental investigations that found significant increases in fasting glucose following omega-3 fatty acid supplementation and foods rich in PUFA and omega-3 fatty acid. Cellular explanations to explain the connection between inflammation and IR include mitochondrial dysfunction, endoplasmic reticulum (ER) stress, and oxidative stress. Modifications in the lipid composition of mitochondrial membranes and/or receptor-mediated signaling may be part of the mechanism behind the activation of mitochondrial fusion by fish oil/omega-3 PUFA. The exact molecular processes by which omega-3 PUFAs control mitochondrial activity to defend against IR are still unknown.
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Affiliation(s)
- Susmita Sinha
- Department of Physiology, Khulna City Medical College and Hospital, 33 KDA Avenue, Hotel Royal Crossing, Khulna Sadar, Khulna 9100, Bangladesh
| | - Mainul Haque
- The Unit of Pharmacology, Faculty of Medicine and Defence Health, Universiti Pertahanan Nasional Malaysia (National Defence University of Malaysia), Kem Perdana Sungai Besi, Kuala Lumpur 57000, Malaysia
- Department of Scientific Research Center (KSRC), Karnavati School of Dentistry, Karnavati University, Gandhinagar 382422, India
| | - Halyna Lugova
- Faculty of Medicine and Health Sciences, UCSI University Springhill (Seremban/PD) Campus, No. 2, Avenue 3, Persiaran Springhill, Port Dickson 71010, Malaysia
| | - Santosh Kumar
- Karnavati School of Dentistry, Karnavati University, A/907, Adalaj-Uvarsad Rd, Gandhinagar 382422, India
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Metabolic Remodeling with Hepatosteatosis Induced Vascular Oxidative Stress in Hepatic ERK2 Deficiency Mice with High Fat Diets. Int J Mol Sci 2022; 23:ijms23158521. [PMID: 35955653 PMCID: PMC9369278 DOI: 10.3390/ijms23158521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/28/2022] [Accepted: 07/29/2022] [Indexed: 11/17/2022] Open
Abstract
We previously demonstrated the marked hepatosteatosis and endothelial dysfunction in hepatocyte-specific ERK2 knockout mice (LE2KO) with a high-fat/high-sucrose diet (HFHSD), but detailed metabolic changes and the characteristics in insulin-sensitive organs were not tested. This study aimed to characterize metabolic remodeling with changes in insulin-sensitive organs, which could induce endothelial dysfunction in HFHSD-LE2KO. The serum glucose and fatty acid (FA) were modestly higher in HFHSD-LE2KO than HFHSD-Control. FA synthesis genes were up-regulated, which was associated with the decreased phosphorylation of AMPK and ACC, and with the up-regulation of SREBP-1 in the liver from HFHSD-LE2KO. In FA and amino acids fraction analysis, arachidonic acid/eicosapentaenoic acid ratio, L-ornithine/arginine ratio, asymmetric dimethylarginine and homocysteine levels were elevated in HFHSD-LE2KO. Insulin-induced phosphorylation of AKT was blunted in skeletal muscle. Serum leptin and IL-1β were elevated, and serum adiponectin was decreased with the enlargement of epididymal adipocytes. Finally, the enhanced superoxide levels in the aorta, which were blunted with CCCP, apocynin, and tempol, were observed in HFHSD-LE2KO. A pre-incubation of aortic rings with tempol improved endothelial dysfunction in HFHSD-LE2KO. HFHSD-LE2KO revealed an acceleration of FA synthesis in the liver leading to insulin resistance in skeletal muscle and the enlargement of visceral adipocytes. Global metabolic remodeling such as changes in arginine metabolism, ω3/ω6 ratio, and adipocytokines, could affect the vascular oxidative stress and endothelial dysfunction in HFHSD-LE2KO.
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