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Hu T, Wei JW, Zheng JY, Luo QY, Hu XR, Du Q, Cai YF, Zhang SJ. Metformin improves cognitive dysfunction through SIRT1/NLRP3 pathway-mediated neuroinflammation in db/db mice. J Mol Med (Berl) 2024:10.1007/s00109-024-02465-1. [PMID: 38953935 DOI: 10.1007/s00109-024-02465-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 05/29/2024] [Accepted: 06/23/2024] [Indexed: 07/04/2024]
Abstract
Diabetes mellitus (DM), an important public health problem, aggravates the global economic burden. Diabetic encephalopathy (DE) is a serious complication of DM in the central nervous system. Metformin has been proven to improve DE. However, the mechanism is still unclear. In this study, the db/db mice, a common model used for DE, were employed to explore and study the neuroprotective effect of metformin and related mechanisms. Behavioral tests indicated that metformin (100 or 200 mg/kg/day) could significantly improve the learning and memory abilities of db/db mice. The outcomes from the oral glucose tolerance test (OGTT) and insulin tolerance test (ITT) demonstrate that metformin effectively modulates glucose and insulin signaling pathways in db/db mice. The results of body weight and blood lipid panel (total cholesterol, triglycerides, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol) show that metformin promotes the level of lipid metabolism in db/db mice. Furthermore, data from oxidative stress assays, which measured levels of malondialdehyde, superoxide dismutase, catalase, and glutathione peroxidase, suggest that metformin suppresses oxidative stress-induced brain damage in db/db mice. In addition, western blot, Nissl staining, and immunofluorescence results showed that metformin increased the expressions of nerve growth factor and postsynaptic density 95 and repaired neuronal structural damage. For the mechanism study, metformin activated SIRT1 and inhibited the expression of NLRP3 inflammasome (NLRP3, ASC, caspase-1, IL-1β, and IL-18) and inflammatory cytokines (TNFα and IL-6). In conclusion, metformin could ameliorate cognitive dysfunction through the SIRT1/NLRP3 pathway, which might be a promising mechanism for DE treatment.
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Affiliation(s)
- Tian Hu
- State Key Laboratory of Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Neurology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Jun-Wen Wei
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Jia-Yi Zheng
- State Key Laboratory of Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Neurology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China
| | - Qing-Yi Luo
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Xin-Rui Hu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, 999077, China
| | - Qun Du
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China.
| | - Ye-Feng Cai
- State Key Laboratory of Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China.
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China.
- Department of Neurology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China.
| | - Shi-Jie Zhang
- State Key Laboratory of Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China.
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China.
- Department of Neurology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China.
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Al-Kuraishy HM, Jabir MS, Al-Gareeb AI, Klionsky DJ, Albuhadily AK. Dysregulation of pancreatic β-cell autophagy and the risk of type 2 diabetes. Autophagy 2024:1-12. [PMID: 38873924 DOI: 10.1080/15548627.2024.2367356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 06/08/2024] [Indexed: 06/15/2024] Open
Abstract
Macroautophagy/autophagy is an essential degradation process that removes abnormal cellular components, maintains homeostasis within cells, and provides nutrition during starvation. Activated autophagy enhances cell survival during stressful conditions, although overactivation of autophagy triggers induction of autophagic cell death. Therefore, early-onset autophagy promotes cell survival whereas late-onset autophagy provokes programmed cell death, which can prevent disease progression. Moreover, autophagy regulates pancreatic β-cell functions by different mechanisms, although the precise role of autophagy in type 2 diabetes (T2D) is not completely understood. Consequently, this mini-review discusses the protective and harmful roles of autophagy in the pancreatic β cell and in the pathophysiology of T2D.
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Affiliation(s)
- Hayder M Al-Kuraishy
- Department of Clinical Pharmacology and Medicine, College of Medicine, Mustansiriyah University, Baghdad, Iraq
| | - Majid S Jabir
- Department of Applied Science, University of Technology- Iraq, Baghdad, Iraq
| | - Ali I Al-Gareeb
- Department of Clinical Pharmacology and Medicine, Jabir ibn Hayyan Medical University, Al-Ameer Qu./Najaf, Kufa, Iraq
| | | | - Ali K Albuhadily
- Department of Clinical Pharmacology and Medicine, College of Medicine, Mustansiriyah University, Baghdad, Iraq
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Hou XX, Li YW, Song JL, Zhang W, Liu R, Yuan H, Feng TT, Jiang ZY, Li WT, Zhu CL. Cryptotanshinone induces apoptosis of activated hepatic stellate cells via modulating endoplasmic reticulum stress. World J Gastroenterol 2023; 29:2616-2627. [PMID: 37213406 PMCID: PMC10198054 DOI: 10.3748/wjg.v29.i17.2616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 02/28/2023] [Accepted: 04/10/2023] [Indexed: 05/23/2023] Open
Abstract
BACKGROUND Cryptotanshinone (CPT) has wide biological functions, including anti-oxidative, antifibrosis, and anti-inflammatory properties. However, the effect of CPT on hepatic fibrosis is unknown.
AIM To investigate the effects of CPT treatment on hepatic fibrosis and its underlying mechanism of action.
METHODS Hepatic stellate cells (HSCs) and normal hepatocytes were treated with different concentrations of CPT and salubrinal. The CCK-8 assay was used to determine cell viability. Flow cytometry was used to measure apoptosis and cell cycle arrest. Reverse transcription polymerase chain reaction (RT-PCR) and Western blot analyses were used to measure mRNA levels and protein expression of endoplasmic reticulum stress (ERS) signaling pathway related molecules, respectively. Carbon tetrachloride (CCL4) was used to induce in vivo hepatic fibrosis in mice. Mice were treated with CPT and salubrinal, and blood and liver samples were collected for histopathological examination.
RESULTS We found that CPT treatment significantly reduced fibrogenesis by modulating the synthesis and degradation of the extracellular matrix in vitro. CPT inhibited cell proliferation and induced cell cycle arrest at the G2/M phase in cultured HSCs. Furthermore, we found that CPT promoted apoptosis of activated HSCs by upregulating expression of ERS markers (CHOP and GRP78) and activating ERS pathway molecules (PERK, IRE1α, and ATF4), which were inhibited by salubrinal. Inhibition of ERS by salubrinal partially eliminated the therapeutic effect of CPT in our CCL4-induced hepatic fibrosis mouse model.
CONCLUSION CPT can promote apoptosis of HSCs and alleviate hepatic fibrosis through modulating the ERS pathway, which represents a promising strategy for treating hepatic fibrosis.
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Affiliation(s)
- Xiao-Xue Hou
- Department of Infectious Disease, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, Jiangsu Province, China
| | - Yu-Wen Li
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, Jiangsu Province, China
| | - Jia-Li Song
- Department of Infectious Disease, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, Jiangsu Province, China
| | - Wen Zhang
- Department of Infectious Disease, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, Jiangsu Province, China
| | - Rui Liu
- Department of Infectious and Tropical Diseases, The Second Affiliated Hospital of Hainan Medical University, Haikou 570000, Hainan Province, China
| | - Hui Yuan
- Department of Infectious Disease, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, Jiangsu Province, China
| | - Tian-Tong Feng
- Department of Infectious Disease, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, Jiangsu Province, China
| | - Zheng-Yi Jiang
- Department of Infectious Disease, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, Jiangsu Province, China
| | - Wen-Ting Li
- Department of Infectious and Tropical Diseases, The Second Affiliated Hospital of Hainan Medical University, Haikou 570000, Hainan Province, China
| | - Chuan-Long Zhu
- Department of Infectious Disease, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, Jiangsu Province, China
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Mesbah Mohamed M, Ahmed Rashed L, Ahmed El-Boghdady N, Mohamed Said M. Bone Marrow-Derived Mesenchymal Stem Cells and Pioglitazone or Exendin-4 Synergistically Improve Insulin Resistance via Multiple Modulatory Mechanisms in High-Fat Diet/Streptozotocin-Induced Diabetes in Rats. Rep Biochem Mol Biol 2023; 12:42-58. [PMID: 37724145 PMCID: PMC10505456 DOI: 10.52547/rbmb.12.1.42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/18/2023] [Indexed: 09/20/2023]
Abstract
Background Diabetes mellitus (DM) is a metabolic disease, characterized by hyperglycemia resulting from defects in insulin secretion and/or insulin action. The current study was designed to assess the therapeutic potential of bone marrow-derived mesenchymal stem cells (BM-MSCs) alone and in combination with pioglitazone (Pz) or exendin-4 (Ex) in high-fat diet/streptozotocin (HFD/STZ)-induced diabetes in rats. Methods The rats were subjected to the HFD for three weeks before being injected with a single low dosage of STZ (35 mg/kg bw). The animals were assigned to different treatment groups after type II diabetes mellitus (T2DM) induction was confirmed. Results Severe insulin resistance was verified in untreated HFD/STZ T2DM rats, along with the exaggeration of oxidative stress, inflammation, apoptosis, and autophagy suppression in the adipose tissues. Monotherapy of HFD/T2DM rats with BM-MSCs and Pz or Ex alleviated diabetic complications by increasing insulin sensitivity, decreasing apoptosis and inflammation as evidenced by a decrease in serum tumor necrosis factor-alpha, caspase-3, and nuclear factor-kappa B (NF-κB) genes expression and Janus kinase (JNK) protein expression, and enhancing autophagy as revealed by upregulation in beclin and LC3, as well as peroxisome proliferator-activated receptor-γ coactivator-1 alpha (PGC-1α) genes expression in the adipose tissues. An augmented ameliorative efficacy was recorded in combined treatments. The biochemical and molecular results were confirmed by histological investigation of pancreatic tissues. Conclusions Combining Pz or Ex with BM-MSCs is a synergistic therapeutic option that reduces insulin resistance and subsequent complications in T2DM via multiple molecular mechanisms.
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Affiliation(s)
| | - Laila Ahmed Rashed
- Department of Medical Biochemistry, Faculty of Medicine, Cairo University, Cairo, Egypt.
| | | | - Mahmoud Mohamed Said
- Biochemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
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Zhirong Z, Li H, Yi L, Lichen Z, Ruiwu D. Ferroptosis in pancreatic diseases: potential opportunities and challenges that require attention. Hum Cell 2023:10.1007/s13577-023-00894-7. [PMID: 36929283 DOI: 10.1007/s13577-023-00894-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/07/2023] [Indexed: 03/18/2023]
Abstract
The pancreas is an abdominal organ with both endocrine and exocrine functions, and patients with pancreatic diseases suffer tremendously. The regulated cell death of various cells in the pancreas is thought to play a key role in disease development. As one of the newly discovered regulated cell death modalities, ferroptosis has the potential for therapeutic applications in the study of multiple diseases. Ferroptosis has been observed in several pancreatic diseases, but its role in pancreatic diseases has not been systematically elucidated or reviewed. Understanding the occurrence of ferroptosis in various pancreatic diseases after damage to the different cell types is crucial in determining disease progression, evaluating targeted therapies, and predicting disease prognosis. Herein, we summarize the research progress associated with ferroptosis in four common pancreatic diseases, namely acute pancreatitis, chronic pancreatitis, pancreatic ductal adenocarcinoma, and diabetes mellitus. Furthermore, the elucidation of ferroptosis in rare pancreatic diseases may provide sociological benefits in the future.
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Affiliation(s)
- Zhao Zhirong
- General Surgery Center, General Hospital of Western Theater Command, No. 270, Rongdu Rd, Jinniu District, Chengdu, 610083, Sichuan, China.,College of Medicine, Southwest Jiaotong University, Chengdu, China
| | - Han Li
- Ultrasound Medical Center, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, Sichuan, China
| | - Liu Yi
- School of Medicine, Jianghan University, Wuhan, 430056, Hubei, China
| | - Zhou Lichen
- General Surgery Center, General Hospital of Western Theater Command, No. 270, Rongdu Rd, Jinniu District, Chengdu, 610083, Sichuan, China.,Pancreatic Injury and Repair Key Laboratory of Sichuan Province, General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Dai Ruiwu
- General Surgery Center, General Hospital of Western Theater Command, No. 270, Rongdu Rd, Jinniu District, Chengdu, 610083, Sichuan, China. .,College of Medicine, Southwest Jiaotong University, Chengdu, China. .,Pancreatic Injury and Repair Key Laboratory of Sichuan Province, General Hospital of Western Theater Command, Chengdu, Sichuan, China.
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Chen J, Zhu G, Xiao W, Huang X, Wang K, Zong Y. Ginsenoside Rg1 Ameliorates Pancreatic Injuries via the AMPK/mTOR Pathway in vivo and in vitro. Diabetes Metab Syndr Obes 2023; 16:779-794. [PMID: 36945297 PMCID: PMC10024876 DOI: 10.2147/dmso.s401642] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 02/21/2023] [Indexed: 03/16/2023] Open
Abstract
BACKGROUND The main propanaxatriol-type saponin found in ginseng (Panax ginseng C. A. Mey), ginsenoside Rg1 (G-Rg1), has bioactivities that include anti-inflammatory, antioxidant, and anti-diabetic properties. This study aimed to investigate the effects of G-Rg1 on streptozotocin (STZ)-induced Type 1 Diabetes mellitus (T1DM) mice and the insulin-secreting cell line in RIN-m5F cells with high-glucose (HG) treatment. METHODS The STZ-induced DM mice model was treated with G-Rg1 alone or combined with 3-Methyladenine (3-MA, an autophagy inhibitor)/rapamycin (RAPA, an autophagy activator) for 8 weeks, and levels of glucose and lipid metabolism, histopathological changes, as well as autophagy and apoptosis of relevant markers were estimated. In vitro, the HG-induced RIN-m5F cells were treated with G-Rg1, 3-MA, and Compound C (CC), an AMPK inhibitor, or their combinations to estimate the influences on cell apoptosis, autophagy, and AMPK/mTOR pathway-associated target gene levels. RESULTS G-Rg1 treatment attenuated glucose and lipid metabolism disorder and pancreatic fibrosis in diabetic mice. In addition, subdued autophagy and p-AMPK protein expression, and enhanced p-mTOR protein expression and apoptosis levels in TIDM mice and HG-induced RIN-m5F cells were ameliorated by G-Rg1 treatment. Furthermore, these anti-apoptosis effects of G-Rg1 were partially abolished by 3-MA and CC. CONCLUSION Our findings revealed that G-Rg1 exhibits strong anti-apoptosis ability in pancreatic tissues of type 1 diabetic mice and HG-induced RIN-m5F cells, and the mechanisms involved in activating AMPK and inhibiting mTOR-mediated autophagy, indicating that G-Rg1 may have the therapeutic and preventive potential for treating pancreatic injury in diabetic patients.
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Affiliation(s)
- Jin Chen
- Department of Hematology, Yiwu Central Hospital, Yiwu, People’s Republic of China
| | - Guoping Zhu
- Department of Radiology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, People’s Republic of China
| | - Wenbo Xiao
- Department of Radiology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, People’s Republic of China
| | - Xiaosong Huang
- Department of Pharmacy, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, People’s Republic of China
| | - Kewu Wang
- Department of Radiology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, People’s Republic of China
- Correspondence: Kewu Wang; Yi Zong, Department of Radiology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, No. N1, Shangcheng Avenue, Yiwu, Zhejiang, People’s Republic of China, Email ;
| | - Yi Zong
- Department of Radiology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, People’s Republic of China
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Song Y, Jiang Y, Shi L, He C, Zhang W, Xu Z, Yang M, Xu Y. Comprehensive analysis of key m5C modification-related genes in type 2 diabetes. Front Genet 2022; 13:1015879. [PMID: 36276976 PMCID: PMC9582283 DOI: 10.3389/fgene.2022.1015879] [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: 08/10/2022] [Accepted: 09/20/2022] [Indexed: 11/13/2022] Open
Abstract
Background: 5-methylcytosine (m5C) RNA methylation plays a significant role in several human diseases. However, the functional role of m5C in type 2 diabetes (T2D) remains unclear.Methods: The merged gene expression profiles from two Gene Expression Omnibus (GEO) datasets were used to identify m5C-related genes and T2D-related differentially expressed genes (DEGs). Least-absolute shrinkage and selection operator (LASSO) regression analysis was performed to identify optimal predictors of T2D. After LASSO regression, we constructed a diagnostic model and validated its accuracy. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were conducted to confirm the biological functions of DEGs. Gene Set Enrichment Analysis (GSEA) was used to determine the functional enrichment of molecular subtypes. Weighted gene co-expression network analysis (WGCNA) was used to select the module that correlated with the most pyroptosis-related genes. Protein-protein interaction (PPI) network was established using the STRING database, and hub genes were identified using Cytoscape software. The competitive endogenous RNA (ceRNA) interaction network of the hub genes was obtained. The CIBERSORT algorithm was applied to analyze the interactions between hub gene expression and immune infiltration.Results: m5C-related genes were significantly differentially expressed in T2D and correlated with most T2D-related DEGs. LASSO regression showed that ZBTB4 could be a predictive gene for T2D. GO, KEGG, and GSEA indicated that the enriched modules and pathways were closely related to metabolism-related biological processes and cell death. The top five genes were identified as hub genes in the PPI network. In addition, a ceRNA interaction network of hub genes was obtained. Moreover, the expression levels of the hub genes were significantly correlated with the abundance of various immune cells.Conclusion: Our findings may provide insights into the molecular mechanisms underlying T2D based on its pathophysiology and suggest potential biomarkers and therapeutic targets for T2D.
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Affiliation(s)
- Yaxian Song
- Department of Endocrinology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yan Jiang
- Department of Endocrinology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Li Shi
- Department of Endocrinology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Chen He
- Department of Geriatric Medicine, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Wenhua Zhang
- Department of Endocrinology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Zhao Xu
- Department of Endocrinology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Mengshi Yang
- Department of Endocrinology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yushan Xu
- Department of Endocrinology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
- *Correspondence: Yushan Xu,
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Kulkarni A, Anderson CM, Mirmira RG, Tersey SA. Role of Polyamines and Hypusine in β Cells and Diabetes Pathogenesis. Metabolites 2022; 12:metabo12040344. [PMID: 35448531 PMCID: PMC9028953 DOI: 10.3390/metabo12040344] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/04/2022] [Accepted: 04/06/2022] [Indexed: 02/04/2023] Open
Abstract
The polyamines—putrescine, spermidine, and spermine—are polycationic, low molecular weight amines with cellular functions primarily related to mRNA translation and cell proliferation. Polyamines partly exert their effects via the hypusine pathway, wherein the polyamine spermidine provides the aminobutyl moiety to allow posttranslational modification of the translation factor eIF5A with the rare amino acid hypusine (hydroxy putrescine lysine). The “hypusinated” eIF5A (eIF5Ahyp) is considered to be the active form of the translation factor necessary for the translation of mRNAs associated with stress and inflammation. Recently, it has been demonstrated that activity of the polyamines-hypusine circuit in insulin-producing islet β cells contributes to diabetes pathogenesis under conditions of inflammation. Elevated levels of polyamines are reported in both exocrine and endocrine cells of the pancreas, which may contribute to endoplasmic reticulum stress, oxidative stress, inflammatory response, and autophagy. In this review, we have summarized the existing research on polyamine-hypusine metabolism in the context of β-cell function and diabetes pathogenesis.
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Singh S, Bansal A, Singh V, Chopra T, Poddar J. Flavonoids, alkaloids and terpenoids: a new hope for the treatment of diabetes mellitus. J Diabetes Metab Disord 2022; 21:941-950. [PMID: 35673446 PMCID: PMC9167359 DOI: 10.1007/s40200-021-00943-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 11/24/2021] [Indexed: 01/11/2023]
Abstract
Diabetes mellitus is a metabolic syndrome characterized by a hyperglycemic state and multi-organ failure. Millions of people worldwide are suffering from this deadly disease taking a hit on their pocket and mental health in the name of its treatment. Modern medical practices with new technological advancements and discoveries have made revolutionary changes in the treatment. But, unfortunately, Glucose-lowering drugs used have many accompanying effects such as chronic vascular disease, renal malfunction, liver disease and, many skin problems. These complications have made us think about alternative treatments for diabetes with minimum or no side effects. Nowadays, in addition to modern medicine, herbal treatment has been suggested to treat diabetes mellitus. These herbal medicines contain biological macromolecules such as flavonoids, Terpenoids, glycosides, and alkaloids, which show versatile anti-diabetic effects. These phytochemicals are generally considered safe, and naturally occurring compounds have a potential role in preventing or controlling diabetes mellitus. The underlying mechanism of their anti-diabetic effects includes improvement in insulin secretion, decrease in insulin resistance, enhanced liver glycogen synthesis, antioxidant and anti-inflammatory activities. In this review, we have focused on the mechanism of various phytochemicals targeting hyperglycemia and its underlying pathogenesis.
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Affiliation(s)
- Sukhpal Singh
- Department of Biochemistry and Central Research Cell, M.M. Institute of Medical Sciences and Research, University Research Fellow, Maharishi Markandeswar (Deemed to be University, Mullana, Ambala, 133207 India
| | - Abhishek Bansal
- Department of Biochemistry, Government Medical College, RAJOURI, Rajouri, Jammu and Kashmir 185135 India
| | - Vikramjeet Singh
- Kalpana Chawla Government Medical College, Karnal, Haryana India
| | - Tanya Chopra
- Department Of Biochemistry and Central Research Cell, M.M. Institute of Medical Sciences and Research, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207 India
| | - Jit Poddar
- Department of Microbiology, RG Kar Medical College & Hospital, Kolkata, West Bengal 700003 India
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Armandeh M, Bameri B, Haghi-Aminjan H, Foroumadi R, Ataei M, Hassani S, Samadi M, Shayesteh MRH, Abdollahi M. A systematic review on the role of melatonin and its mechanisms on diabetes-related reproductive impairment in non-clinical studies. Front Endocrinol (Lausanne) 2022; 13:1022989. [PMID: 36303864 PMCID: PMC9592976 DOI: 10.3389/fendo.2022.1022989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/23/2022] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Diabetes-induced reproductive complications can lead to subfertility and infertility, raising the need to protect reproductive organs. There are limited medications used to improve reproductive health in diabetic patients. Melatonin, mainly produced by the pineal gland, may improve diabetes-associated reproductive complications through various mechanisms and may be a preferred candidate to protect the reproductive system. The present review aims to elucidate the underlying mechanisms of melatonin's effect on the reproductive system adversely affected by diabetes mellitus (DM). METHODS A comprehensive systematic literature electronic search was done using the PRISMA guidelines. Web of Science, PubMed, Embase, and Scopus were searched for publications up to June 2022. Search terms were selected based on the study purpose and were explored in titles and abstracts. After screening, out of a total of 169 articles, 14 pertinent articles were included based on our inclusion and exclusion criteria. RESULTS The results of studies using rats and mice suggest that DM adversely affects reproductive tissues, including testes and epididymis, prostate, corpus cavernosum, and ovary leading to alterations in histological and biochemical parameters compared to the normal groups. Treatment with melatonin improves oxidative stress, blocks apoptosis induced by endoplasmic reticulum stress and caspase activation, reduces pro-inflammation cytokines, and enhances steroidogenesis. CONCLUSION Melatonin exerted a protective action on the impaired reproductive system in in-vivo and in-vitro models of DM. The topic has to be followed up in human pregnancy cases that will need more time to be collected and approved.
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Affiliation(s)
- Maryam Armandeh
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Toxicology & Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Behnaz Bameri
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Toxicology & Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Hamed Haghi-Aminjan
- Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
- *Correspondence: Hamed Haghi-Aminjan, ; Mohammad Abdollahi, ;
| | - Roham Foroumadi
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahshid Ataei
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Toxicology & Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Shokoufeh Hassani
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Toxicology & Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Mahedeh Samadi
- Neuroscience Research Center, Iran University of Medical Science, Tehran, Iran
| | | | - Mohammad Abdollahi
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Toxicology & Diseases Group, Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
- *Correspondence: Hamed Haghi-Aminjan, ; Mohammad Abdollahi, ;
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Xianchu L, Ming L, Changhao C, Beiwang D, Jingtao X. Sinapic acid attenuates muscle atrophy in streptozotocin-induced diabetic mice. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2021; 24:1695-1701. [PMID: 35432808 PMCID: PMC8976897 DOI: 10.22038/ijbms.2021.60324.13370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 11/30/2021] [Indexed: 11/06/2022]
Abstract
Objectives Diabetes is fundamentally connected with the inability of skeletal muscle. Sinapic acid (SA) has multiple biologic functions and is diffusely utilized in diabetic complications. The purpose of this study was to explore the potential improvement effect and mechanisms of SA in streptozotocin (STZ)-induced diabetic muscle atrophy. Materials and Methods The model of diabetic mice was established by intraperitoneal STZ (200 mg/kg) to evaluate the treatment effect of SA (40 mg/kg/d for 8 weeks) on muscle atrophy. Muscle fiber size was assessed by Hematoxylin and Eosin (HE) staining. Muscle force was measured by a dynamometer. Biochemical parameters were tested by using corresponding commercial kits. The expressions of Atrogin-1, MuRF-1, nuclear respiratory factor 1 (NRF-1), peroxisome proliferative activated receptor gamma coactivator 1 alpha (PGC-1α), CHOP, GRP-78, BAX, and BCL-2 were detected by Western blot. Results Our data demonstrated that SA increased fiber size and weight of gastrocnemius, and enhanced grip strength to alleviate diabetes-induced muscle atrophy. In serum, SA restrained creatine kinase (CK), lactate dehydrogenase (LDH), malondialdehyde (MDA), tumor necrosis factor (TNF-a), and interleukin 6 (IL-6) levels, while enhancing total anti-oxidant capacity (T-AOC), superoxide dismutase (SOD) and catalase (CAT) levels to improve muscle injury. In gastrocnemius, SA promoted NRF-1, PGC-1α, and BCL-2 expressions, while inhibiting Atrogin-1, MuRF-1, CHOP, GRP-87, and BAX expressions. Conclusion SA protected against diabetes-induced gastrocnemius injury via improvement of mitochondrial function, endoplasmic reticulum (ER) stress, and apoptosis, and could be developed to prevent and treat diabetic muscle atrophy.
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Affiliation(s)
- Liu Xianchu
- Institute of Physical Culture, Hunan University of Arts and Science, 415000 Changde, China
| | - Liu Ming
- Faculty of Science, College of Furong, Hunan University of Arts and Science, 415000 Changde, China,Corresponding author: Liu Ming. Faculty of Science, College of Furong, Hunan University of Arts and Science, 415000 Changde, China.
| | - Cheng Changhao
- Institute of Physical Culture, Hunan University of Arts and Science, 415000 Changde, China
| | - Deng Beiwang
- Institute of Physical Culture, Hunan University of Arts and Science, 415000 Changde, China
| | - Xie Jingtao
- The First Affiliated Hospital of Hunan University of Chinese Medicine, 410021 Changsha, China
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12
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Elseady WS, Abd Ellatif RA, Estfanous RS, Emam MN, Keshk WA. New insight on the role of liraglutide in alleviating dexamethasone-induced pancreatic cytotoxicity via improving redox status, autophagy flux, and PI3K/Akt/Nrf2 signaling. Can J Physiol Pharmacol 2021; 99:1217-1225. [PMID: 34197718 DOI: 10.1139/cjpp-2021-0183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chronic glucocorticoids therapy is commonly complicated by steroid diabetes, although the underlying mechanisms are still elusive. Liraglutide, a glucagon-like peptide-1, was initially found to induce glycemic control and recently it was found to have many pleotropic effects; however, its role in pancreas remains unknown. The present study aims to estimate the protective role of liraglutide on dexamethasone-induced pancreatic cytotoxicity and hyperglycemia, highlighting the possible underlying biochemical, molecular, and cellular mechanisms. Twenty-eight male Wistar rats were involved in this study and were randomly divided into four groups. Group III and IV were treated with 1 mg/kg dexamethasone daily for 10 days. Group II and IV were treated with liraglutide in a dose of 0.8 mg/kg per day for 2 weeks. Pancreatic caspase-9, nuclear factor erythroid 2-related factor 2 (Nrf2), phospho-protein kinase-B (pAkt), and sequestrome 1 (p62) levels were assessed by immunoassay. Moreover, phosphoinositide 3-kinase (PI3K) expression by real-time PCR, microtubule-associated protein light chain 3 (LC3B) expression by immunohistochemistry, glycemic status, β-cell function by homoeostasis model assessment (HOMA) β index, and pancreatic redox status were assessed. Liraglutide improved blood glucose level, β-cell function, pancreatic caspase-9 level, redox status, and autophagy. Additionally, it increased pancreatic PI3K, pAkt, and Nrf2 levels. Moreover, preservation of pancreatic histological and the ultrastructural morphological features of β- and α-cells were observed. In conclusion, liraglutide protected against dexamethasone-induced pancreatic injury and hyperglycemia and decelerated the progression towards steroid diabetes via activating PI3K/Akt/Nrf2 signaling and autophagy flux pathways.
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Affiliation(s)
- Walaa S Elseady
- Department of Anatomy, Faculty of Medicine, Tanta University, Egypt
| | | | | | - Marwa N Emam
- Department of Physiology, Faculty of Medicine, Tanta University, Egypt
| | - Walaa A Keshk
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Egypt
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13
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Bao S, Wang X, Cho SB, Wu YL, Wei C, Han S, Bao L, Wu Q, Ao W, Nan JX. Agriophyllum Oligosaccharides Ameliorate Diabetic Insulin Resistance Through INS-R/IRS/Glut4-Mediated Insulin Pathway in db/db Mice and MIN6 Cells. Front Pharmacol 2021; 12:656220. [PMID: 34497509 PMCID: PMC8419282 DOI: 10.3389/fphar.2021.656220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 07/21/2021] [Indexed: 12/25/2022] Open
Abstract
We have previously reported that Agriophyllum oligosaccharides (AOS) significantly enhance glycemic control by increasing the activation of insulin receptor (INS-R), insulin receptor substrate-2 (IRS-2), phosphatidylinositol 3 kinase (PI3K), protein kinase B (AKT), peroxisome proliferator-activated receptor (PPAR)-γ, and glucose transporter 4 (Glut4) proteins in hepatic tissues. However, the effect of glucose control by AOS on the regulation of pancreatic tissues in db/db mice and MIN6 cells remains to be determined. An oral dose of AOS (380 or 750 mg/kg) was administered to type-2 diabetic db/db mice for 8 weeks to determine whether AOS regulates glucose by the INS-R/IRS/Glut4-mediated insulin pathway. Meanwhile, the effects of AOS on glucose uptake and its related signaling pathway in MIN6 cells were also investigated. The results showed that the random blood glucose (RBG) level in the AOS-treated group was lower than that in the control group. AOS reduced the levels of glycated hemoglobin (HbA1c) and free fatty acid (FFA) and significantly improved the pathological changes in the pancreatic tissues in db/db mice. Moreover, immunohistochemical analysis revealed that the expression of INS-R, IRS-1, IRS-2, and Glut4 was increased in the AOS-treated group than in the model group. Further, in vitro experiments using MIN6 cells showed that AOS regulated INS-R, IRS-1, IRS-2, and Glut4 protein and mRNA levels and attenuated insulin resistance and cell apoptosis. The results of both in vitro and in vivo experiments were comparable. Ultra-performance liquid chromatography coupled with time-of-flight mass spectrometric analysis of AOS with precolumn derivatization with 3-amino-9-ethylcarbazole (AEC) tentatively identified five types of sugars: glucose, lactose, rutinose, glucuronic acid, and maltotriose. Our present study clearly showed that AOS is efficacious in preventing hyperglycemia, possibly by increasing insulin sensitivity and improving IR by regulating the INS-R/IRS/Glut4 insulin signal pathway. Therefore, AOS may be considered as a potential drug for diabetes treatment.
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Affiliation(s)
- Shuyin Bao
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, China.,Medical College, Inner Mongolia University for Nationalities, Tongliao, China
| | - Xiuzhi Wang
- Department of Medicines and Foods, Tongliao Vocational College, Tongliao, China.,The Research Institute of Traditional Mongolian Medicine Engineering Technology, Tongliao, China
| | - Sung Bo Cho
- College of Traditional Mongolian Medicine, Inner Mongolia University for Nationalities, Tongliao, China
| | - Yan-Ling Wu
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, China
| | - Chengxi Wei
- Medical College, Inner Mongolia University for Nationalities, Tongliao, China
| | - Shuying Han
- Basic Medical College, North China University of Science and Technology, Tangshan, China
| | - Liming Bao
- College of Traditional Mongolian Medicine, Inner Mongolia University for Nationalities, Tongliao, China
| | - Qiong Wu
- Department of Cardiology, Tongliao Second People's Hospital, Tongliao, China
| | - Wuliji Ao
- The Research Institute of Traditional Mongolian Medicine Engineering Technology, Tongliao, China.,College of Traditional Mongolian Medicine, Inner Mongolia University for Nationalities, Tongliao, China
| | - Ji-Xing Nan
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, China.,Clinical Research Center, Yanbian University Hospital, Yanji, China
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14
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Samir SM, Elalfy M, Nashar EME, Alghamdi MA, Hamza E, Serria MS, Elhadidy MG. Cardamonin exerts a protective effect against autophagy and apoptosis in the testicles of diabetic male rats through the expression of Nrf2 via p62-mediated Keap-1 degradation. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2021; 25:341-354. [PMID: 34187951 PMCID: PMC8255125 DOI: 10.4196/kjpp.2021.25.4.341] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 05/08/2021] [Accepted: 05/27/2021] [Indexed: 12/14/2022]
Abstract
Cardamonin (CARD) is a chalconoid with anti-inflammatory and antioxidant properties, and it is present in several plants. We sought to explore whether CARD exerts any positive effects against hyperglycemia-induced testicular dysfunction caused by type 2 diabetes and aimed to identify its possible intracellular pathways. Adult male rats were subdivided into six groups: control, CARD, diabetic (DM), DM + glibenclamide (GLIB), DM + CARD and DM + GLIB + CARD. Type 2 DM induced a significant increase in blood glucose and insulin resistance, along with diminished serum insulin, testosterone and gonadotropins levels, which were associated with the impairment of key testicular androgenic enzymes and cellular redox balance. Administration of CARD at a dose of 80 mg/kg for 4 weeks effectively normalized all of these alterations, and the improvement was confirmed by epididymal sperm analysis. After treatment with CARD, the pathological changes in spermatogenic tubules were markedly improved. Significantly, CARD upregulated testicular glucose transporter-8 (GLUT-8) expression and had inhibitory effects on elevated autophagy markers and caspase-3 immunoreactive cells. Furthermore, our results revealed that CARD was able to attenuate damage via activation of Nrf2 through the p62-dependent degradation of testicular anti-Kelch-like ECH-associated protein-1 (Keap-1). In conclusion, this study suggests that CARD provides protection against diabetic stress-mediated testicular damage. The use of CARD with conventional anti-diabetic therapy was associated with improved efficacy compared with conventional therapy alone.
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Affiliation(s)
- Shereen M Samir
- Department of Medical Physiology, College of Medicine, Mansoura University, Mansoura 35511, Egypt
| | - Mahmoud Elalfy
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35511, Egypt
| | - Eman Mohamad El Nashar
- Department of Anatomy, Faculty of Medicine, King Khalid University, Abha 61421, Saudi Arabia.,Department of Histology and Cell Biology, College of Medicine, Benha University, Benha 13511, Egypt
| | - Mansour A Alghamdi
- Department of Anatomy, College of Medicine, King Khalid University, Abha 61421, Saudi Arabia.,Genomics and Personalized Medicine Unit, College of Medicine, King Khalid University, Abha 61421, Saudi Arabia
| | - Eman Hamza
- Medical Biochemistry Department, College of Medicine, Mansoura University, Mansoura 35511, Egypt
| | - Mohamed Saad Serria
- Medical Biochemistry Department, College of Medicine, Mansoura University, Mansoura 35511, Egypt
| | - Mona G Elhadidy
- Department of Medical Physiology, College of Medicine, Mansoura University, Mansoura 35511, Egypt.,Department of Medical Physiology, College of Medicine, Al-Baha University, Al-Baha 65525, Saudi Arabia
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15
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Xiang H, Shao M, Lu Y, Wang J, Wu T, Ji G. Kaempferol Alleviates Steatosis and Inflammation During Early Non-Alcoholic Steatohepatitis Associated With Liver X Receptor α-Lysophosphatidylcholine Acyltransferase 3 Signaling Pathway. Front Pharmacol 2021; 12:690736. [PMID: 34262459 PMCID: PMC8273916 DOI: 10.3389/fphar.2021.690736] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 06/15/2021] [Indexed: 12/12/2022] Open
Abstract
Background: Kaempferol (KP) has a variety of biological effects such as anti-inflammatory, anti-oxidant, anti-aging and cardiovascular protection. Whether KP has a therapeutic effect on non-alcoholic steatohepatitis (NASH), and the detailed mechanism is currently unclear. This study aims to explore the mechanism of KP in the treatment of NASH through in vivo and in vitro experiments. Methods: 1) In vivo experiment: In the C57BL/6 NASH mice model induced by high fat diet (HFD), KP was administered by gavage at a dose of 20 mg/kg/day. 2) In vitro experiment: Palmitic acid/Oleic acid (PA/OA, 0.375/0.75 mM) was used to intervene HepG2 and AML12 cells to establish a steatosis cell model. Three concentrations of KP, low (20 μmol/L), medium (40 μmol/L) and high (60 μmol/L) were used in vitro. The mRNA and protein expression of related molecules involved in LXRα-LPCAT3-ERS pathway were detected using RT-qPCR and Western blot. Results: In the NASH mouse model, KP can significantly reduce the expression of LXRα, LPCAT3 and ERS-related factors PERK, eIF2α, ATF6, ATF4, XBP1, CHOP, IRE1α and GRP78. In the PA/OA-induced cell model, KP could decrease the content of triglyceride and lipid droplets, and also decrease the expression of LXR α, LPCAT3 and ERS related factors PERK, eIF2α, ATF6, ATF4, XBP1, CHOP, IRE1α and GRP78. Conclusion: KP may decrease the expression level of LXRα and LPCAT3, thus improve ERS and reduce hepatic steatosis and inflammation.
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Affiliation(s)
- Hongjiao Xiang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Mingmei Shao
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yifei Lu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Junmin Wang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Tao Wu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Guang Ji
- Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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16
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Peptidome Analysis of Pancreatic Tissue Derived from T1DM Mice: Insights into the Pathogenesis and Clinical Treatments of T1DM. BIOMED RESEARCH INTERNATIONAL 2021; 2021:9987042. [PMID: 34095316 PMCID: PMC8164536 DOI: 10.1155/2021/9987042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/14/2021] [Indexed: 11/17/2022]
Abstract
Bioactive peptides attract growing concerns for their participation in multiple biological processes. Their roles in the pathogenesis of type 1 diabetes mellitus remain poorly understood. In this study, we used LC-MS/MS technology to compare the peptide profiling between pancreatic tissue of T1DM mice and pancreatic tissue of matched control groups. A total of 106 peptides were differentially expressed in T1DM pancreatic tissue, including 43 upregulated and 63 downregulated peptides. Most of the precursor proteins are insulin. Further bioinformatics analysis (GO and pathway analysis) indicated that the potential functions of these differential peptides were tightly related to regulation of endoplasmic reticulum stress. In conclusion, this study highlights new candidate peptides and provides a new perspective for exploring T1DM pathogenesis and clinical treatments.
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17
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Paving the Road Toward Exploiting the Therapeutic Effects of Ginsenosides: An Emphasis on Autophagy and Endoplasmic Reticulum Stress. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1308:137-160. [PMID: 33861443 DOI: 10.1007/978-3-030-64872-5_12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Programmed cell death processes such as apoptosis and autophagy strongly contribute to the onset and progression of cancer. Along with these lines, modulation of cell death mechanisms to combat cancer cells and elimination of resistance to apoptosis is of great interest. It appears that modulation of autophagy and endoplasmic reticulum (ER) stress with specific agents would be beneficial in the treatment of several disorders. Interestingly, it has been suggested that herbal natural products may be suitable candidates for the modulation of these processes due to few side effects and significant therapeutic potential. Ginsenosides are derivatives of ginseng and exert modulatory effects on the molecular mechanisms associated with autophagy and ER stress. Ginsenosides act as smart phytochemicals that confer their effects by up-regulating ATG proteins and converting LC3-I to -II, which results in maturation of autophagosomes. Not only do ginsenosides promote autophagy but they also possess protective and therapeutic properties due to their capacity to modulate ER stress and up- and down-regulate and/or dephosphorylate UPR transducers such as IRE1, PERK, and ATF6. Thus, it would appear that ginsenosides are promising agents to potentially restore tissue malfunction and possibly eliminate cancer.
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18
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Sophoricoside ameliorates cardiac hypertrophy by activating AMPK/mTORC1-mediated autophagy. Biosci Rep 2021; 40:226492. [PMID: 32964914 PMCID: PMC7677750 DOI: 10.1042/bsr20200661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 07/20/2020] [Accepted: 08/03/2020] [Indexed: 02/01/2023] Open
Abstract
Aim: The study aims to evaluate protective effects of sophoricoside (Sop) on cardiac hypertrophy. Meanwhile, the potential and significance of Sop should be broadened and it should be considered as an attractive drug for the treatment of pathological cardiac hypertrophy and heart failure. Methods: Using the phenylephrine (PE)-induced neonatal rat cardiomyocytes (NRCMs) enlargement model, the potent protection of Sop against cardiomyocytes enlargement was evaluated. The function of Sop was validated in mice received transverse aortic coarctation (TAC) or sham surgery. At 1 week after TAC surgery, mice were treated with Sop for the following 4 weeks, the hearts were harvested after echocardiography examination. Results: Our study revealed that Sop significantly mitigated TAC-induced heart dysfunction, cardiomyocyte hypertrophy and cardiac fibrosis. Mechanistically, Sop treatment induced a remarkable activation of AMPK/mTORC1-autophagy cascade following sustained hypertrophic stimulation. Importantly, the protective effect of Sop was largely abolished by the AMPKα inhibitor Compound C, suggesting an AMPK activation-dependent manner of Sop function on suppressing pathological cardiac hypertrophy. Conclusion: Sop ameliorates cardiac hypertrophy by activating AMPK/mTORC1-mediated autophagy. Hence, Sop might be an attractive candidate for the treatment of pathological cardiac hypertrophy and heart failure.
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19
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Lin MW, Chen CI, Cheng TT, Huang CC, Tsai JW, Feng GM, Hwang TZ, Lam CF. Prolonged preoperative fasting induces postoperative insulin resistance by ER-stress mediated Glut4 down-regulation in skeletal muscles. Int J Med Sci 2021; 18:1189-1197. [PMID: 33526980 PMCID: PMC7847634 DOI: 10.7150/ijms.52701] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 12/21/2020] [Indexed: 01/14/2023] Open
Abstract
Preoperative fasting aims to prevent pulmonary aspiration and improve bowel preparation, but it may induce profound systemic catabolic responses that lead to protein breakdown and insulin-resistant hyperglycemia after operation. However, the molecular mechanisms of catabolic reaction induced by prolonged preoperative fasting and surgical stress are undetermined. In this study, anesthetized rats were randomly assigned to receive a sham operation or laparotomy cecectomy. Fasting groups were restricted from food and water for 12 h before operation, while the feeding group had free access to food throughout the study period. Twenty-four hours after operation, the animals were sacrificed to collect blood samples and soleus muscles for analysis. Postoperative blood glucose level was significantly increased in the fasting group with elevated serum insulin and C-peptide. Continuous feeding reduced serum myoglobin and lactate dehydrogenase concentrations. Preoperative fasting activated inositol-requiring transmembrane kinase/endoribonuclease (IRE)-1α and c-Jun N-terminal kinase (JNK) mediated endoplasmic reticulum (ER)-stress, and reduced glucose transporter type 4 (Glut4) expression in the soleus muscle. Phospholamban phosphorylation was reduced and intracellular calcium levels were increased in the isolated skeletal muscle cells. Similar results were found in ER stress-induced C1C12 myoblasts. The expression of Glut4 was suppressed in the stressed C1C12, but was potentiated following inhibition of ER stress and chelation of intracellular free calcium. This study provides evidence demonstrating that prolonged preoperative fasting induces ER stress and generates insulin resistance in the skeletal muscle through suppression of Glut4 and inactivation of Ca2+-ATPase, leading to intracellular calcium homeostasis disruption and peripheral insulin resistance.
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Affiliation(s)
- Ming-Wei Lin
- Department of Medical Research, E-Da Hospital/E-Da Cancer Hospital, Kaohsiung, Taiwan.,Department of Nursing, I-Shou University College of Medicine, Kaohsiung, Taiwan.,Regenerative Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-I Chen
- Colorectal Surgery, Department of Surgery, E-Da Hospital/E-Da Cancer Hospital, Kaohsiung, Taiwan
| | - Tzu-Ting Cheng
- Department of Anesthesiology, E-Da Hospital/E-Da Cancer Hospital, Kaohsiung, Taiwan
| | - Chien-Chi Huang
- Department of Medical Research, E-Da Hospital/E-Da Cancer Hospital, Kaohsiung, Taiwan
| | - Jen-Wei Tsai
- Department of Pathology, E-Da Hospital, Kaohsiung, Taiwan
| | - Guan-Ming Feng
- Department of Plastic Surgery, E-Da Hospital, Kaohsiung, Taiwan
| | - Tzer-Zen Hwang
- Department of Otolaryngology, E-Da Hospital, Kaohsiung, Taiwan
| | - Chen-Fuh Lam
- Department of Anesthesiology, E-Da Hospital/E-Da Cancer Hospital, Kaohsiung, Taiwan.,School of Medicine, I-Shou University College of Medicine, Kaohsiung, Taiwan
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20
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Liu J, Lang G, Shi J. Epigenetic Regulation of PDX-1 in Type 2 Diabetes Mellitus. Diabetes Metab Syndr Obes 2021; 14:431-442. [PMID: 33564250 PMCID: PMC7866918 DOI: 10.2147/dmso.s291932] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 01/16/2021] [Indexed: 12/25/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is a metabolic disease characterized by hyperglycemia which is caused by insufficient insulin secretion or insulin resistance. Interaction of genetic, epigenetic and environmental factors plays a significant role in the development of T2DM. Several environmental factors including diet and lifestyle, as well as age have been associated with an increased risk for T2DM. It has been demonstrated that these environmental factors may affect global epigenetic status, and alter the expression of susceptible genes, thereby contributing to the pathogenesis of T2DM. In recent years, a growing body of molecular and genetic studies in diabetes have been focused on the ways to restore the numbers or function of β-cells in order to reverse a range of metabolic consequences of insulin deficiency. The pancreatic duodenal homeobox 1 (PDX-1) is a transcriptional factor that is essential for the development and function of islet cells. A number of studies have shown that there is a significant increase in the level of DNA methylation of PDX-1 resulting in reduced activity in T2DM islets. The decrease in PDX-1 activity may be a critical mediator causing dysregulation of pancreatic β cells in T2DM. This article reviews the epigenetic mechanisms of PDX-1 involved in T2DM, focusing on diabetes and DNA methylation, and discusses some potential strategies for the application of PDX-1 in the treatment of diabetes.
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Affiliation(s)
- Jiangman Liu
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563000, People’s Republic of China
| | - Guangping Lang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563000, People’s Republic of China
| | - Jingshan Shi
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, 563000, People’s Republic of China
- Correspondence: Jingshan Shi Tel +86-851-286-436-66Fax +86-851-286-423-03 Email
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21
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Zhao XY, Yu TT, Liu S, Liu YJ, Liu JJ, Qin J. Effect of liraglutide on endoplasmic reticulum stress in the renal tissue of type 2 diabetic rats. World J Diabetes 2020; 11:611-621. [PMID: 33384768 PMCID: PMC7754169 DOI: 10.4239/wjd.v11.i12.611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/28/2020] [Accepted: 10/21/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Liraglutide is a glucagon-like peptide 1 receptor agonist analog that has been found to have a therapeutic effect in diabetes. In addition to its ability to treat diabetes, liraglutide has beneficial effects on the cardiovascular system and kidney as well as other beneficial effects, but its specific mechanism is not clear. In this study, a rat model of type 2 diabetes was established by administration of a high-sugar, high-fat diet combined with low-dose streptozotocin (STZ) to observe the effect of liraglutide on the kidneys of type 2 diabetes rats and the possible underlying mechanisms.
AIM To explore whether liraglutide has a protective effect on type 2 diabetic rat kidneys and the underlying mechanisms.
METHODS Eight-week-old male Sprague-Dawley rats were randomly divided into a control group, model group, low-dose liraglutide group, and high-dose liraglutide group. Control rats were fed a standard diet, while model group and intervention group rats were fed high-sugar, high-fat feed for 1 mo and then intraperitoneally injected with 40 mg/kg STZ to induce type 2 diabetes. The low-dose and high-dose intervention groups received 100 µg/kg and 200 µg/kg liraglutide, respectively, once daily by subcutaneous injection. The control and model groups were given an equivalent volume of physiological saline for 8 wk. Pathological changes in renal tissues were observed by hematoxylin and eosin staining and periodic acid-Schiff staining, and GRP78 and caspase-12 expression was detected by Western blot and reverse transcription-polymerase chain reaction (RT-PCR).
RESULTS Western blot analysis showed that GRP78 and caspase-12 protein expression in kidney tissue was significantly higher in model rats than in normal rats and lower in the liraglutide-treated groups than in the model group, with a more significant decrease being observed in the high-dose group than in the low-dose group. RT-PCR showed that the mRNA expression of GRP78 and caspase-12 was higher in model rats than in control rats and lower in the liraglutide-treated groups than in the model group, with the high-dose group exhibiting a more significant decrease than the low-dose group.
CONCLUSION Liraglutide may delay the progression of diabetic nephropathy by reducing endoplasmic reticulum stress and protect the kidneys in a dose-dependent manner.
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Affiliation(s)
- Xuan-Ye Zhao
- Department of Endocrinology, Shanxi Provincial People's Hospital, Taiyuan 030012, Shanxi Province, China
| | - Ting-Ting Yu
- Department of Endocrinology, Shanxi Provincial People's Hospital, Taiyuan 030012, Shanxi Province, China
| | - Sheng Liu
- Department of Endocrinology, Shanxi Provincial People's Hospital, Taiyuan 030012, Shanxi Province, China
| | - Yao-Ji Liu
- Department of Endocrinology, Shanxi Provincial People's Hospital, Taiyuan 030012, Shanxi Province, China
| | - Jing-Jin Liu
- Department of Endocrinology, Shanxi Provincial People's Hospital, Taiyuan 030012, Shanxi Province, China
| | - Jie Qin
- Department of Endocrinology, Shanxi Provincial People's Hospital, Taiyuan 030012, Shanxi Province, China
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22
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Russell JS, Griffith TA, Naghipour S, Vider J, Du Toit EF, Patel HH, Peart JN, Headrick JP. Dietary α-Linolenic Acid Counters Cardioprotective Dysfunction in Diabetic Mice: Unconventional PUFA Protection. Nutrients 2020; 12:nu12092679. [PMID: 32887376 PMCID: PMC7551050 DOI: 10.3390/nu12092679] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/12/2020] [Accepted: 08/26/2020] [Indexed: 12/15/2022] Open
Abstract
Whether dietary omega-3 (n-3) polyunsaturated fatty acid (PUFA) confers cardiac benefit in cardiometabolic disorders is unclear. We test whether dietary -linolenic acid (ALA) enhances myocardial resistance to ischemia-reperfusion (I-R) and responses to ischemic preconditioning (IPC) in type 2 diabetes (T2D); and involvement of conventional PUFA-dependent mechanisms (caveolins/cavins, kinase signaling, mitochondrial function, and inflammation). Eight-week male C57Bl/6 mice received streptozotocin (75 mg/kg) and 21 weeks high-fat/high-carbohydrate feeding. Half received ALA over six weeks. Responses to I-R/IPC were assessed in perfused hearts. Localization and expression of caveolins/cavins, protein kinase B (AKT), and glycogen synthase kinase-3 β (GSK3β); mitochondrial function; and inflammatory mediators were assessed. ALA reduced circulating leptin, without affecting body weight, glycemic dysfunction, or cholesterol. While I-R tolerance was unaltered, paradoxical injury with IPC was reversed to cardioprotection with ALA. However, post-ischemic apoptosis (nucleosome content) appeared unchanged. Benefit was not associated with shifts in localization or expression of caveolins/cavins, p-AKT, p-GSK3β, or mitochondrial function. Despite mixed inflammatory mediator changes, tumor necrosis factor-a (TNF-a) was markedly reduced. Data collectively reveal a novel impact of ALA on cardioprotective dysfunction in T2D mice, unrelated to caveolins/cavins, mitochondrial, or stress kinase modulation. Although evidence suggests inflammatory involvement, the basis of this "un-conventional" protection remains to be identified.
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Affiliation(s)
- Jake S. Russell
- School of Medical Science, Griffith University Gold Coast, Southport QLD 4217, Australia; (J.S.R.); (T.A.G.); (S.N.); (J.V.); (E.F.D.T.); (J.N.P.)
| | - Tia A. Griffith
- School of Medical Science, Griffith University Gold Coast, Southport QLD 4217, Australia; (J.S.R.); (T.A.G.); (S.N.); (J.V.); (E.F.D.T.); (J.N.P.)
| | - Saba Naghipour
- School of Medical Science, Griffith University Gold Coast, Southport QLD 4217, Australia; (J.S.R.); (T.A.G.); (S.N.); (J.V.); (E.F.D.T.); (J.N.P.)
| | - Jelena Vider
- School of Medical Science, Griffith University Gold Coast, Southport QLD 4217, Australia; (J.S.R.); (T.A.G.); (S.N.); (J.V.); (E.F.D.T.); (J.N.P.)
| | - Eugene F. Du Toit
- School of Medical Science, Griffith University Gold Coast, Southport QLD 4217, Australia; (J.S.R.); (T.A.G.); (S.N.); (J.V.); (E.F.D.T.); (J.N.P.)
| | - Hemal H. Patel
- VA San Diego Healthcare System and Department of Anesthesiology, University of California, San Diego, CA 92093, USA;
| | - Jason N. Peart
- School of Medical Science, Griffith University Gold Coast, Southport QLD 4217, Australia; (J.S.R.); (T.A.G.); (S.N.); (J.V.); (E.F.D.T.); (J.N.P.)
| | - John P. Headrick
- School of Medical Science, Griffith University Gold Coast, Southport QLD 4217, Australia; (J.S.R.); (T.A.G.); (S.N.); (J.V.); (E.F.D.T.); (J.N.P.)
- Correspondence: ; Tel.: +61-7-5552-8292
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Baddela VS, Sharma A, Vanselow J. Non-esterified fatty acids in the ovary: friends or foes? Reprod Biol Endocrinol 2020; 18:60. [PMID: 32505200 PMCID: PMC7275390 DOI: 10.1186/s12958-020-00617-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 05/25/2020] [Indexed: 12/23/2022] Open
Abstract
A majority of common metabolic diseases can result in excessive lipolysis, leading to elevated levels of non-esterified fatty acids (NEFAs) in the body fluids. In females, increased NEFA levels in the follicular fluid markedly alter the functions of intrafollicular cells such as granulosa cells (GCs) and oocytes. Therefore, elevated levels of NEFAs have been suggested to be a significant player of subfertility in females of both human and economically important animal species such as cattle, buffalo, sheep, pig, chicken, and dog. However, the effects imposed by saturated and unsaturated fatty acids (SFAs and UFAs) on ovarian follicles are controversial. The present review emphasizes that SFAs induce apoptosis in granulosa and cumulus cells of ovarian follicles in different species. They further could adversely affect oocyte maturation and developmental competence. Many types of UFAs affect steroidogenesis and proliferation processes and could be detrimental for follicular cells, especially when at elevated concentrations. Interestingly, monounsaturated fatty acids (MUFAs) appear to contribute to the etiology of the polycystic ovarian syndrome (PCOS) as they were found to induce the transcription and translation of the androgenic transcription factor SOX9 while downregulating its estrogenic counterpart FOXL2 in GCs. Overall, this review presents our revised understanding of the effects of different fatty acids on the female reproductive success, which may allow other researchers and clinicians to investigate the mechanisms for treating metabolic stress-induced female infertility.
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Affiliation(s)
- Vijay Simha Baddela
- grid.418188.c0000 0000 9049 5051Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany
| | - Arpna Sharma
- grid.418188.c0000 0000 9049 5051Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany
| | - Jens Vanselow
- grid.418188.c0000 0000 9049 5051Institute of Reproductive Biology, Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany
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24
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Choi YK, Kang JI, Han S, Kim YR, Jo J, Kang YW, Choo DR, Hyun JW, Koh YS, Yoo ES, Kang HK. L-Ascorbic Acid Inhibits Breast Cancer Growth by Inducing IRE/JNK/CHOP-Related Endoplasmic Reticulum Stress-Mediated p62/SQSTM1 Accumulation in the Nucleus. Nutrients 2020; 12:nu12051351. [PMID: 32397306 PMCID: PMC7284633 DOI: 10.3390/nu12051351] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/24/2020] [Accepted: 05/02/2020] [Indexed: 12/11/2022] Open
Abstract
Anticancer effects of L-ascorbic acid (Vitamin C, L-AA) have been reported in various types of cancers. L-AA intake reduces breast cancer recurrence and mortality; however, the role of L-AA in the treatment of breast cancer remains poorly understood. In this study, we investigated the effect and mechanism action of L-AA on breast cancer growth. L-AA inhibited the growth of breast cancer cells by inducing apoptotic cell death at the evaluated treatment concentrations without affecting normal cells. Moreover, L-AA induces autophagosome formation via regulation of mammalian target of rapamycin (mTOR), Beclin1, and autophagy-related genes (ATGs) and increased autophagic flux. Notably, we observed that L-AA increased p62/SQSTM1 (sequestosome 1) protein levels. Accumulation of p62 protein in cancer cells in response to stress has been reported, but its role in cancer regulation remains controversial. Here, we demonstrated that L-AA-induced p62 accumulation is related to L-AA-induced breast cancer growth inhibition. Furthermore, L-AA induced endoplasmic reticulum (ER) stress via the IRE–JNK–CHOP (inositol-requiring endonuclease–c-Jun N-terminal kinase–C/EBP homologous protein) signaling pathways, which increased the nuclear levels of p62/SQSTM1. These findings provide evidence that L-AA-induced ER stress could be crucial for p62 accumulation-dependent cell death, and L-AA can be useful in breast cancer treatment.
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Affiliation(s)
- Youn Kyung Choi
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
| | - Jung-Il Kang
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
| | - Sanghoon Han
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
| | - Young Ree Kim
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
| | - Jaemin Jo
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
| | - Yong Woo Kang
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
| | - Do Ryeon Choo
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
| | - Jin Won Hyun
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
- Jeju Research Center for Natural Medicine, Jeju National University; 102 Jejudaehakno, Jeju 63243, Korea
| | - Young Sang Koh
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
- Jeju Research Center for Natural Medicine, Jeju National University; 102 Jejudaehakno, Jeju 63243, Korea
| | - Eun-Sook Yoo
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
- Jeju Research Center for Natural Medicine, Jeju National University; 102 Jejudaehakno, Jeju 63243, Korea
| | - Hee-Kyoung Kang
- Department of Medicine, School of Medicine, Jeju National University 102 Jejudaehakno, Jeju 63243, Korea; (Y.K.C.); (J.-I.K.); (S.H.); (Y.R.K.); (J.J.); (Y.W.K.); (D.R.C.); (J.W.H.); (Y.S.K.); (E.-S.Y.)
- Jeju Research Center for Natural Medicine, Jeju National University; 102 Jejudaehakno, Jeju 63243, Korea
- Correspondence: ; Tel.:+82-10-6214-5464
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The Mitochondrial Antioxidant SS-31 Modulates Oxidative Stress, Endoplasmic Reticulum Stress, and Autophagy in Type 2 Diabetes. J Clin Med 2019; 8:jcm8091322. [PMID: 31466264 PMCID: PMC6780723 DOI: 10.3390/jcm8091322] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/09/2019] [Accepted: 08/26/2019] [Indexed: 02/06/2023] Open
Abstract
Mitochondrial dysfunction has been shown to play a central role in the pathophysiology of type 2 diabetes (T2D), and mitochondria-targeted agents such as SS-31 are emerging as a promising strategy for its treatment. We aimed to study the effects of SS-31 on leukocytes from T2D patients by evaluating oxidative stress, endoplasmic reticulum (ER) stress and autophagy. Sixty-one T2D patients and 53 controls were included. Anthropometric and analytical measurements were performed. We also assessed reactive oxygen species (ROS) production, calcium content, the expression of ER stress markers GRP78, CHOP, P-eIF2α, and autophagy-related proteins Beclin1, LC3 II/I, and p62 in leukocytes from T2D and control subjects treated or not with SS-31. Furthermore, we have evaluated the action of SS-31 on leukocyte-endothelium interactions. T2D patients exhibited elevated ROS concentration, calcium levels and presence of ER markers (GRP78 and CHOP gene expression, and GRP78 and P-eIF2α protein expression), all of which were reduced by SS-31 treatment. SS-31 also led to a drop in BECN1 gene expression, and Beclin1 and LC3 II/I protein expression in T2D patients. In contrast, the T2D group displayed reduced p62 protein levels that were restored by SS-31. SS-20 (with non-antioxidant activity) did not change any analyzed parameter. In addition, SS-31 decreased rolling flux and leukocyte adhesion, and increased rolling velocity in T2D patients. Our findings suggest that SS-31 exerts potentially beneficial effects on leukocytes of T2D patients modulating oxidative stress and autophagy, and ameliorating ER stress.
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Trotta MC, Maisto R, Guida F, Boccella S, Luongo L, Balta C, D’Amico G, Herman H, Hermenean A, Bucolo C, D’Amico M. The activation of retinal HCA2 receptors by systemic beta-hydroxybutyrate inhibits diabetic retinal damage through reduction of endoplasmic reticulum stress and the NLRP3 inflammasome. PLoS One 2019; 14:e0211005. [PMID: 30657794 PMCID: PMC6338370 DOI: 10.1371/journal.pone.0211005] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 01/04/2019] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE The role of the hydroxycarboxylic acid receptor 2 (HCA2) in the retinal damage induced by diabetes has never been explored. In this context, the present study highlights an upregulation of retinal HCA2 receptors in diabetic C57BL6J mice. Moreover, we illustrate that HCA2 receptors exert an anti-inflammatory effect on the retinal damage induced by diabetes when activated by the endogenous ligand β-hydroxybutyrate. METHODOLOGY Seven-to-10-week-old C57BL6J mice were rendered diabetic by a single intraperitoneal injection of streptozotocin (75 mg/kg of body weight) and monitored intermittently over a 10-week period extending from the initial diabetes assessment. Mice with a fasting blood glucose level higher than 250 mg/dl for 2 consecutive weeks after streptozotocin injection were treated twice a week with intraperitoneal injections of 25-50-100 mg/kg β-hydroxybutyrate. RESULTS Interestingly, while the retinal endoplasmic reticulum stress markers (pPERK, pIRE1, ATF-6α) were elevated in diabetic C57BL6J mice, their levels were significantly reduced by the systemic intraperitoneal treatment with 50 mg/kg and 100 mg/kg β-hydroxybutyrate. These mice also exhibited high NLRP3 inflammasome activity and proinflammatory cytokine levels. In fact, the elevated levels of retinal NLRP3 inflammasome activation markers (NLRP3, ASC, caspase-1) and of the relative proinflammatory cytokines (IL-1β, IL-18) were significantly reduced by 50 mg/kg and 100 mg/kg β-hydroxybutyrate treatment. These doses also reduced the high apoptotic cell number exhibited by the diabetic mice in the retinal outer nuclear layer (ONL) and increased the ONL low connexin 43 expression, leading to an improvement in retinal permeability and homeostasis. CONCLUSIONS These data suggest that the systemic treatment of diabetic C57BL6J mice with BHB activates retinal HCA2 and inhibits local damage.
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Affiliation(s)
- Maria Consiglia Trotta
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Rosa Maisto
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Francesca Guida
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Serena Boccella
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Livio Luongo
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Cornel Balta
- Institute of Life Sciences, Vasile Goldis Western University of Arad, Arad, Romania
| | | | - Hildegard Herman
- Institute of Life Sciences, Vasile Goldis Western University of Arad, Arad, Romania
| | - Anca Hermenean
- Institute of Life Sciences, Vasile Goldis Western University of Arad, Arad, Romania
- Department of Biochemistry and Molecular Biology, University of Bucharest, Bucharest, Romania
| | - Claudio Bucolo
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
- Center for Research in Ocular Pharmacology—CERFO University of Catania, Catania, Italy
| | - Michele D’Amico
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Naples, Italy
- * E-mail:
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Saleh A, Anwar MM, Zayed AE, Ezz Eldeen MES, Afifi G, Alnashiri HM, Gomaa AMS, Abd-Elkareem M, Abou-Elhamd AS, Shaheen ES, Mohamed GA, Hetta HF, Kotb AM. Impact of Ginkgo biloba extract and magnetized water on the survival rate and functional capabilities of pancreatic β-cells in type 2 diabetic rat model. Diabetes Metab Syndr Obes 2019; 12:1339-1347. [PMID: 31496771 PMCID: PMC6689767 DOI: 10.2147/dmso.s209856] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Accepted: 07/16/2019] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Type 2 diabetes (T2D) is a widely distributed disease that affects large population worldwide. This study aimed to verify the role of Ginkgo biloba (GB) extract and magnetized water (MW) on the survival rate and functional capabilities of pancreatic β-cells in type 2 diabetic rats. MATERIALS AND METHODS T2D was induced by feeding the rats on a high-fat diet (20% fat, 45% carbohydrate, 22% protein) for eight weeks followed by intra-peritoneal injection of a single low dose of streptozotocin (25mg/Kg). Forty rats were randomly assigned to four groups (n=10 rats) as follows: non treated control and three diabetic groups. One diabetic group served as a positive control (diabetic), while the other two groups were orally administered with water extract of GB leaves (0.11 g/kg/day) and MW (600 gauss) for four weeks, respectively. RESULTS The β-cell mass and insulin expression in these cells increased markedly after both treatments, particularly in GB treated group. In addition, the immune-expression of the two antioxidant enzymes; glutathione and superoxide dismutase 2 (SOD2) in the pancreatic tissue demonstrated a down-regulation in GB and MW treated groups as compared with the diabetic group. CONCLUSION A four-week treatment of GB and MW protected pancreatic β-cell cells and improved their insulin expression and antioxidant status in type 2 diabetic rats.
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Affiliation(s)
- Ahmed Saleh
- Department of Physics, Faculty of Science, Jazan University, Jazan, KSA
- Exploratory Center of Science and Technology
, Cairo, Egypt
| | - Mamdouh M Anwar
- Department of Pharmacology, Faculty of Pharmacy, Jazan University, Jazan, KSA
- Medical Physiology Department, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Ahmed E Zayed
- Department of Biology, Faculty of Science, Jazan University, Jazan, KSA
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
| | - Manal El Sayed Ezz Eldeen
- Endocrine Unit, Department of Internal Medicine, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Gamal Afifi
- Department of Physics, Faculty of Science, Jazan University, Jazan, KSA
- National Institute for Laser Enhanced Sciences, Cairo University
, Giza, Egypt
| | | | - Asmaa MS Gomaa
- Medical Physiology Department, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mahmoud Abd-Elkareem
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
| | - Alaa Sayed Abou-Elhamd
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | | | - Ghada A Mohamed
- Endocrine Unit, Department of Internal Medicine, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Helal F Hetta
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
- Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Correspondence: Helal F HettaDepartment of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, 231 Albert B. Sabin Way, PO Box 670595, OH45267-0595, USAEmail
| | - Ahmed M Kotb
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
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Zhang L, Sun H, Liu S, Gao J, Xia J. Glycemic variability is associated with vascular calcification by the markers of endoplasmic reticulum stress-related apoptosis, Wnt1, galectin-3 and BMP-2. Diabetol Metab Syndr 2019; 11:67. [PMID: 31452690 PMCID: PMC6701112 DOI: 10.1186/s13098-019-0464-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 08/13/2019] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The present study identified whether glycemic variability (GV) was associated with vascular calcification and explored the underlying mechanisms. METHODS Eighty-four consecutive type 2 diabetic patients with unstable angina (UA) were included from January 2018 to June 2018 to calculate calcification scores using computerized tomographic angiography (CTA), and the patients were divided into 2 groups: high calcification score group (HCS group) and low calcification score group (LCS group). Intergroup differences in GV were determined via comparisons of the standard deviation (SD) of blood glucose. Calcification staining, content measurement, apoptosis evaluation and Western blot analysis of endoplasmic reticulum (ER) stress-related apoptosis, Wnt1, galectin-3 and bone morphogenetic protein-2 (BMP-2) were compared in cell cultures from rat vascular smooth muscle cells in the different degrees of GV. RESULTS The SD increased significantly with the increases in calcification scores from human studies (HCS group 2.37 ± 0.82 vs. LCS group 1.87 ± 0.78, p = 0.007). Multivariate logistic regression analysis suggested that increased SD and serum creatinine were independent predictors of calcification. The high GV group had a higher apoptotic rate, higher calcification content and higher expressions of glucose-regulated protein, caspase-3, Wnt1, galectin-3 and BMP-2 markers compared to the low GV group in the in vitro studies (p < 0.001). CONCLUSION We report the novel finding that GV is associated with vascular calcification, and ER stress-related apoptosis, Wnt1, galectin-3 and BMP-2 may be involved in this regulation.
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Affiliation(s)
- Li Zhang
- Department of Geriatrics, Xuanwu Hospital, Capital Medical University, China National Clinical Research Center for Geriatric Medicine, Beijing, 100053 China
| | - Haichen Sun
- Surgical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, 100053 China
| | - Shuang Liu
- Surgical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing, 100053 China
| | - Jinhuan Gao
- Department of Cardiology, Xuanwu Hospital, Capital Medical University, Beijing, 100053 China
| | - Jinggang Xia
- Department of Cardiology, Xuanwu Hospital, Capital Medical University, Beijing, 100053 China
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Cecilia OM, José Alberto CG, José NP, Ernesto Germán CM, Ana Karen LC, Luis Miguel RP, Ricardo Raúl RR, Adolfo Daniel RC. Oxidative Stress as the Main Target in Diabetic Retinopathy Pathophysiology. J Diabetes Res 2019; 2019:8562408. [PMID: 31511825 PMCID: PMC6710812 DOI: 10.1155/2019/8562408] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 06/17/2019] [Accepted: 07/15/2019] [Indexed: 12/12/2022] Open
Abstract
Diabetic retinopathy (DR) is one of the most common complications of diabetes mellitus (DM) causing vision impairment even at young ages. There are numerous mechanisms involved in its development such as inflammation and cellular degeneration leading to endothelial and neural damage. These mechanisms are interlinked thus worsening the diabetic retinopathy outcome. In this review, we propose oxidative stress as the focus point of this complication onset.
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Affiliation(s)
- Olvera-Montaño Cecilia
- Institute of Clinical and Experimental Therapeutics, Department of Physiology, Health Sciences University Center, University of Guadalajara, Mexico
| | - Castellanos-González José Alberto
- Department of Ophthalmology, Specialties Hospital of the National Occidental Medical Center, Mexican Institute of Social Security, Mexico
| | - Navarro-Partida José
- Tecnológico de Monterrey Institute, School of Medicine and Health Sciences, Campus Guadalajara, Mexico
| | - Cardona-Muñoz Ernesto Germán
- Institute of Clinical and Experimental Therapeutics, Department of Physiology, Health Sciences University Center, University of Guadalajara, Mexico
| | - López-Contreras Ana Karen
- Institute of Clinical and Experimental Therapeutics, Department of Physiology, Health Sciences University Center, University of Guadalajara, Mexico
| | | | - Robles-Rivera Ricardo Raúl
- Institute of Clinical and Experimental Therapeutics, Department of Physiology, Health Sciences University Center, University of Guadalajara, Mexico
| | - Rodríguez-Carrizalez Adolfo Daniel
- Institute of Clinical and Experimental Therapeutics, Department of Physiology, Health Sciences University Center, University of Guadalajara, Mexico
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Sá C, Pestana D, Calhau C, Faria A. Unravelling the Effect of p,p'-Dichlorodiphenyldichloroethylene (DDE) in Hypertension of Wistar Rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:12847-12854. [PMID: 30415545 DOI: 10.1021/acs.jafc.8b05001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hypertension is a multifactorial disease with limited knowledge of the involved mechanisms. p,p'-DDE ( p,p'-dichlorodiphenyldichloroethylene) is a pollutant commonly found in tissues that interferes with endocrine signaling. This study aimed to evaluate the mechanism of hypertension triggered by p,p'-DDE exposure in the presence or absence of a HF (high-fat) diet in rats. The renin-angiotensin system (RAS) was evaluated by qPCR in liver and adipose tissue (AT), and a transcriptome analysis comparing visceral AT of HF diet and HF/DDE groups was performed. HF diet influenced RAS, but the p,p'-DDE effect was more evident in liver than in AT (interaction between the diet and p,p'-DDE treatment affected aldosterone receptor and angiotensin converting enzyme 2 expression in liver, p < 0.05, two-way ANOVA). p,p'-DDE induced a decrease in the expression of genes involved in the retinoid acid biosynthesis pathway (Crabp1; -2.07-fold; p = 0.018), eNOS activation (Nos1; -1.64-fold; p = 0.012), and regulation and urea cycle (Ass1; -2.07-fold; p = 0.02). This study suggested that p,p'-DDE may play a fundamental role in the pathogenesis of hypertension, not exclusively in RAS but also by induction of hyperuricemia and increased oxidative stress, which may lead to endoplasmic reticulum stress and vascular injury.
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Affiliation(s)
- Carla Sá
- CINTESIS , Center for Health Technology and Services Research , Al. Prof. Hernâni Monteiro , 4200-369 Porto , Portugal
- Department of Biochemistry, Faculty of Medicine , University of Porto , Al. Prof. Hernâni Monteiro , 4200-369 Porto , Portugal
| | - Diogo Pestana
- CINTESIS , Center for Health Technology and Services Research , Al. Prof. Hernâni Monteiro , 4200-369 Porto , Portugal
- Nutrition & Metabolism , NOVA Medical School - FCM Universidade Nova de Lisboa , Campo Mártires da Pátria, 130 1169-056 Lisboa , Portugal
| | - Conceição Calhau
- CINTESIS , Center for Health Technology and Services Research , Al. Prof. Hernâni Monteiro , 4200-369 Porto , Portugal
- Nutrition & Metabolism , NOVA Medical School - FCM Universidade Nova de Lisboa , Campo Mártires da Pátria, 130 1169-056 Lisboa , Portugal
| | - Ana Faria
- CINTESIS , Center for Health Technology and Services Research , Al. Prof. Hernâni Monteiro , 4200-369 Porto , Portugal
- Nutrition & Metabolism , NOVA Medical School - FCM Universidade Nova de Lisboa , Campo Mártires da Pátria, 130 1169-056 Lisboa , Portugal
- Comprehensive Health Research Centre NOVA Medical School - FCM Universidade Nova de Lisboa , Campo Mártires da Pátria, 130 1169-056 Lisboa , Portugal
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Li X, Meng L, Wang F, Hu X, Yu Y. Sodium fluoride induces apoptosis and autophagy via the endoplasmic reticulum stress pathway in MC3T3-E1 osteoblastic cells. Mol Cell Biochem 2018; 454:77-85. [PMID: 30519783 DOI: 10.1007/s11010-018-3454-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 10/05/2018] [Indexed: 02/06/2023]
Abstract
Fluorosis and bone pathologies can be caused by chronic and/or excessive fluoride intake. Despite this, few studies have been conducted on the cellular mechanisms underlying osteoblast toxicity in the presence of NaF. Here, we investigated the effects of fluoride on MC3T3-E1 cells. We showed that the proliferation of MC3T3-E1 cells was inhibited by exposure to NaF. In addition, apoptosis was induced by NaF, as caspase-associated proteins showed a higher level of expression and apoptotic bodies were formed. Furthermore, endoplasmic reticulum (ER) stress induced by NaF activated the unfolded protein response (UPR) and upregulated the expression of the glucose-regulated proteins 94 (GRP94) and 78 (BiP). Therefore, ER stress plays a vital role in NaF-induced autophagy and apoptosis. Furthermore, apoptosis is promoted following the inhibition of NaF-induced autophagy. In conclusion, under NaF treatment, the ER stress-signaling pathway is activated, leading to apoptosis and autophagy and affecting the proliferation and survival of MC3T3-E1 cells.
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Affiliation(s)
- Xueyan Li
- Department of Stomatology, Eye & Ent Hospital of Fudan University, Shanghai, 200031, China
| | - Li Meng
- Department of Pharmacy, Qingdao Central Hospital, Qingdao, 266042, Shandong, China
| | - Feng Wang
- Department of Stomatology, The First Affiliated Hospital of Dalian Medical University, Dalian, 116023, Liaoning, China
| | - Xiaojie Hu
- Plastic and Reconstructive Department, Shanghai 9th People's Hospital, Shanghai Jiaotong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China.
| | - Youcheng Yu
- Department of Stomatology, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, China.
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Klee NS, McCarthy CG, Lewis S, McKenzie JL, Vincent JE, Webb RC. Urothelial Senescence in the Pathophysiology of Diabetic Bladder Dysfunction-A Novel Hypothesis. Front Surg 2018; 5:72. [PMID: 30564582 PMCID: PMC6288180 DOI: 10.3389/fsurg.2018.00072] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 11/12/2018] [Indexed: 12/11/2022] Open
Abstract
Diabetic bladder dysfunction (DBD) is a well-recognized and common symptom affecting up to 50% of all diabetic patients. DBD has a broad range of clinical presentations ranging from overactive to underactive bladder symptoms that develops in middle-aged to elderly patients with long standing and poorly controlled diabetes. Low efficacy of current therapeutics and lifestyle interventions combined with high national healthcare costs highlight the need for more research into bladder dysfunction pathophysiology and novel treatment options. Cellular senescence is an age-related physiologic process in which cells undergo irreversible growth arrest induced by replicative exhaustion and damaging insults. While controlled senescence negatively regulates cell proliferation and promotes tissue regeneration, uncontrolled senescence is known to result in tissue dysfunction through enhanced secretion of inflammatory factors. This review presents previous scientific findings and current hypotheses that characterize diabetic bladder dysfunction. Further, we propose the novel hypothesis that cellular senescence within the urothelial layer of the bladder contributes to the pro-inflammatory/pro-oxidant environment and symptoms of diabetic bladder dysfunction. Our results show increased cellular senescence in the urothelial layer of the bladder; however, whether this phenomenon is the cause or effect of DBD is unknown. The urothelial layer of the bladder is made up of transitional epithelia specialized to contract and expand with demand and plays an active role in transmission by modulating afferent activity. Transition from normal functioning urothelial cells to secretory senescence cells would not only disrupt the barrier function of this layer but may result in altered signaling and sensation of bladder fullness; dysfunction of this layer is known to result in symptoms of frequency and urgency. Future DBD therapeutics may benefit from targeting and preventing early transition of urothelial cells to senescent cells.
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Affiliation(s)
- Nicole S Klee
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, United States
| | - Cameron G McCarthy
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, United States
| | - Steven Lewis
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, United States
| | - Jaine L McKenzie
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, United States.,Department of Surgery, Medical College of Georgia at Augusta University, Augusta, GA, United States
| | - Julie E Vincent
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, United States
| | - R Clinton Webb
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, GA, United States
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Chen T, Zhu H, Wang Y, Zhao P, Chen J, Sun J, Zhang X, Zhu G. Apoptosis of bone marrow mesenchymal stromal/stem cells via the MAPK and endoplasmic reticulum stress signaling pathways. Am J Transl Res 2018; 10:2555-2566. [PMID: 30210692 PMCID: PMC6129506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 07/22/2018] [Indexed: 06/08/2023]
Abstract
Therapy for myocardial regeneration using bone marrow stromal cells (BM-MSCs) has been applied to improve the cardiac function of subjects with acute myocardial infarction. However, the study of this therapy has encountered a bottleneck because BM-MSCs are prone to apoptosis in ischemic and anoxic environments. The goal of this study was to investigate the expression of mitogen activated protein kinase (MAPK) (p-38, JNK and ERK) and endoplasmic reticulum stress protein (caspase-12 and CHOP) during BM-MSC apoptosis. In a BM-MSC model of hypoxia and serum deprivation (H/SD), we observed the morphology and apoptotic rate of BM-MSCs for 24 h and found that the nuclear shrinkage and apoptosis rate increased gradually and reached a maximum apoptosis rate at the 6 h time point. Then, with the prolongation of the hypoxia time, the number of nuclear shrinkage cells and the apoptosis rate gradually decreased. The expression levels of p-38, JNK, ERK, procaspase-12, caspase-12 and CHOP increased at each H/SD time point. In addition, compared with the H/SD 6 h group, the nuclear shrinkage and apoptosis rate were decreased in the SB202190 and SP600125 groups but increased in the PD98059 group. Further, the expression of caspase-12 in the SB202190 group decreased, while the expression of procaspase-12 increased, compared with the H/SD 6 h group. Overall, our findings suggested that p-38, JNK, CHOP and caspase-12 play important roles in promoting the apoptosis of BM-MSCs, while ERK is contrary to other signals. Moreover, the apoptosis of BM-MSCs was induced by H/SD via the p-38-caspase-12 signaling pathway.
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Affiliation(s)
- Tielong Chen
- Department of Cardiology, Hangzhou Hospital of Traditional Chinese Medicine Hangzhou, China
| | - Houyong Zhu
- Department of Cardiology, Hangzhou Hospital of Traditional Chinese Medicine Hangzhou, China
| | - Yu Wang
- Department of Cardiology, Hangzhou Hospital of Traditional Chinese Medicine Hangzhou, China
| | - Pengjie Zhao
- Department of Cardiology, Hangzhou Hospital of Traditional Chinese Medicine Hangzhou, China
| | - Jingyu Chen
- Department of Cardiology, Hangzhou Hospital of Traditional Chinese Medicine Hangzhou, China
| | - Jing Sun
- Department of Cardiology, Hangzhou Hospital of Traditional Chinese Medicine Hangzhou, China
| | - Xiudong Zhang
- Department of Cardiology, Hangzhou Hospital of Traditional Chinese Medicine Hangzhou, China
| | - Guangli Zhu
- Department of Cardiology, Hangzhou Hospital of Traditional Chinese Medicine Hangzhou, China
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Fan M, Jiang H, Zhang Y, Ma Y, Li L, Wu J. Liraglutide Enhances Autophagy and Promotes Pancreatic β Cell Proliferation to Ameliorate Type 2 Diabetes in High-Fat-Fed and Streptozotocin-Treated Mice. Med Sci Monit 2018; 24:2310-2316. [PMID: 29664069 PMCID: PMC5917824 DOI: 10.12659/msm.906286] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Background Clinical and experimental studies have revealed that liraglutide has multiple anti-diabetes biological effects. However, little is known about its role in autophagy and pancreatic β cell proliferation. This study aimed to assessed the effects of liraglutide on pancreatic β cell proliferation and autophagy in a mouse model of type 2 diabetes. Material/Methods The effect of liraglutide on autophagy and proliferation in pancreatic β cells was investigated using a high-fat-fed and streptozotocin-induced mouse model of type 2 diabetes. Results Liraglutide significantly improved the symptoms of high-fat-fed (HFD) and streptozotocin (STZ)-induced type 2 diabetic mice, as indicated by body weight gain, reduction of blood glucose and plasma insulin, and enhanced sensitivity to insulin. The results of quantitative real-time polymerase chain reaction and Western blot analysis showed that liraglutide upregulated AGT5 expression and promoted the conversion of LC3-I to LC3-II, thus improving the defective autophagy. In addition, we observed that both mRNA and protein expressions of PCNA and Ki-67 were upregulated by liraglutide treatment. Immunocytochemical staining results showed that the number of PCNA- or Ki-67-positive cells in pancreatic islet tissues in the HFD + STZ + liraglutide group were increased compared with the HFD + STZ group. Conclusions These results strongly suggest that liraglutide is able to enhance autophagy and promote pancreatic β cell proliferation. This study improves our insights into the mechanism by which liraglutide treatment relieves diabetes, and provides experimental evidence for clinical utilization of liraglutide in type 2 diabetes treatment.
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Affiliation(s)
- Menglin Fan
- Department of Endocrinology, First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China (mainland)
| | - Hongwei Jiang
- Department of Endocrinology, First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China (mainland)
| | - Yingyu Zhang
- Department of Endocrinology, First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China (mainland)
| | - Yujin Ma
- Department of Endocrinology, First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China (mainland)
| | - Liping Li
- Department of Endocrinology, First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China (mainland)
| | - Jiannan Wu
- Institute of Neurological Diseases, First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China (mainland)
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Liu ML, Wang ML, Lv JJ, Wei J, Wan J. Glibenclamide exacerbates adriamycin-induced cardiotoxicity by activating oxidative stress-induced endoplasmic reticulum stress in rats. Exp Ther Med 2018; 15:3425-3431. [PMID: 29545864 PMCID: PMC5840948 DOI: 10.3892/etm.2018.5862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 01/29/2018] [Indexed: 12/24/2022] Open
Abstract
Adriamycin (ADR) is a chemotherapeutic drug used to treat tumors in a clinical setting. However, its use is limited by a side effect of cardiotoxicity. Glibenclamide (Gli), an inhibitor of mitochondrial ATP-dependent potassium (K-ATP) channels, blocks the cardioprotective effects of mitochondrial K-ATP channel openers and induces apoptosis in rodent pancreatic islet β-cell lines. However, little is known about the role of Gli in ADR-induced cardiotoxicity. The present study was designed to investigate the impact of Gli on ADR-induced cardiotoxicity in rats. A total of 60 male Sprague-Dawley rats were divided into the following 4 groups: i) Control; ii) Gli; iii) ADR; and iv) Gli+ADR (n=15 in each). The rats in the ADR and Gli+ADR groups were treated with ADR (intraperitoneal, 2.5 mg/kg/week) for 6 weeks. The rats in the Gli and Gli+ADR groups received Gli at a dose of 12 mg/kg/day via gastric lavage for 30 days from the eighth week of the study. Following the completion of Gli treatment, cardiac function was assessed by echocardiography, and the rats were sacrificed. The hearts were subsequently harvested for analysis. The rats in the ADR group demonstrated significantly impaired cardiac function and increased levels of oxidative stress, endoplasmic reticulum stress (ERS) and apoptosis in the heart compared with rats in the control and Gli groups (without ADR treatment). These abnormalities were exacerbated by Gli in the Gli+ADR group. Gli treatment decreased cardiac function and significantly increased oxidative stress, ERS and apoptosis levels in myocardial tissues in rats treated with ADR. The findings indicated that Gli triggers oxidative stress-induced ERS, and thus exacerbates ADR-induced cardiotoxicity in rats.
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Affiliation(s)
- Meng-Lin Liu
- Department of Emergency, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Meng-Long Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, Hubei Key Laboratory of Cardiology, Wuhan, Hubei 430060, P.R. China
| | - Jing-Jun Lv
- Department of Emergency, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Jie Wei
- Department of Emergency, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Jun Wan
- Department of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, Hubei Key Laboratory of Cardiology, Wuhan, Hubei 430060, P.R. China
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36
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You L, Mao L, Wei J, Jin S, Yang C, Liu H, Zhu L, Qian W. The crosstalk between autophagic and endo-/exosomal pathways in antigen processing for MHC presentation in anticancer T cell immune responses. J Hematol Oncol 2017; 10:165. [PMID: 29058602 PMCID: PMC5651564 DOI: 10.1186/s13045-017-0534-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 10/11/2017] [Indexed: 02/07/2023] Open
Abstract
T cells recognize antigen fragments from proteolytic products that are presented to them in the form of peptides on major histocompatibility complex (MHC) molecules, which is crucial for the T cell to identify infected or transformed cells. Autophagy, a process that delivers cytoplasmic constituents for lysosomal degradation, has been observed to provide a substantial source of intra- and extracellular antigens for MHC presentation to T cells, which will impact the tumor-specific immune response. Meanwhile, extracellular components are transported to cytoplasm for the degradation/secretion process by the endo-/exosomal pathway and are thus involved in multiple physiological and pathological processes, including immune responses. Autophagy and endo-/exosomal pathways are intertwined in a highly intricate manner and both are closely involved in antigen processing for MHC presentation; thus, we propose that they may coordinate in antigen processing and presentation in anticancer T cell immune responses. In this article, we discuss the molecular and functional crosstalk between autophagy and endo-/exosomal pathways and their contributions to antigen processing for MHC presentation in anticancer T cell immune responses.
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Affiliation(s)
- Liangshun You
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.,Institute of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China.,Malignant Lymphoma Diagnosis and Therapy Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China
| | - Liping Mao
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.,Institute of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China
| | - Juying Wei
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.,Institute of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China.,Malignant Lymphoma Diagnosis and Therapy Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China
| | - Shenhe Jin
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.,Institute of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China.,Malignant Lymphoma Diagnosis and Therapy Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China
| | - Chunmei Yang
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.,Institute of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China
| | - Hui Liu
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.,Institute of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China.,Malignant Lymphoma Diagnosis and Therapy Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China
| | - Li Zhu
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.,Institute of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China.,Malignant Lymphoma Diagnosis and Therapy Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China
| | - Wenbin Qian
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China. .,Institute of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, Zhejiang, People's Republic of China. .,Malignant Lymphoma Diagnosis and Therapy Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310003, China.
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Yang JS, Lu CC, Kuo SC, Hsu YM, Tsai SC, Chen SY, Chen YT, Lin YJ, Huang YC, Chen CJ, Lin WD, Liao WL, Lin WY, Liu YH, Sheu JC, Tsai FJ. Autophagy and its link to type II diabetes mellitus. Biomedicine (Taipei) 2017; 7:8. [PMID: 28612706 PMCID: PMC5479440 DOI: 10.1051/bmdcn/2017070201] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 05/02/2017] [Indexed: 02/06/2023] Open
Abstract
Autophagy, a double-edged sword for cell survival, is the research object on 2016 Nobel Prize in Physiology or Medicine. Autophagy is a molecular mechanism for maintaining cellular physiology and promoting survival. Defects in autophagy lead to the etiology of many diseases, including diabetes mellitus (DM), cancer, neurodegeneration, infection disease and aging. DM is a metabolic and chronic disorder and has a higher prevalence in the world as well as in Taiwan. The character of diabetes mellitus is hyperglycemia resulting from defects in insulin secretion, insulin action, or both. Type 2 diabetes mellitus (T2DM) is characterized by insulin resistance and failure of producing insulin on pancreatic beta cells. In T2DM, autophagy is not only providing nutrients to maintain cellular energy during fasting, but also removes damaged organelles, lipids and miss-folded proteins. In addition, autophagy plays an important role in pancreatic beta cell dysfunction and insulin resistance. In this review, we summarize the roles of autophagy in T2DM.
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Affiliation(s)
- Jai-Sing Yang
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Department of Medical Research, China Medical University Hospital, China Medical University Taichung
404 Taiwan
| | - Chi-Cheng Lu
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Department of Medical Research, China Medical University Hospital, China Medical University Taichung
404 Taiwan
| | - Sheng-Chu Kuo
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School of Pharmacy, China Medical University Taichung
404 Taiwan
| | - Yuan-Man Hsu
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Department of Biological Science and Technology, China Medical University Taichung
404 Taiwan
| | - Shih-Chang Tsai
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Department of Biological Science and Technology, China Medical University Taichung
404 Taiwan
| | - Shih-Yin Chen
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Yng-Tay Chen
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Ying-Ju Lin
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Yu-Chuen Huang
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Chao-Jung Chen
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Wei-De Lin
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Wen-Lin Liao
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Wei-Yong Lin
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Yu-Huei Liu
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
| | - Jinn-Chyuan Sheu
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Institute of Biomedical Sciences, National Sun Yat-sen University Kaohsiung
804 Taiwan
| | - Fuu-Jen Tsai
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Genetics Center, Department of Medical Research, China Medical University Hospital Taichung
404 Taiwan
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School of Chinese Medicine, China Medical University Taichung
404 Taiwan
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Department of Medical Genetics, China Medical University Hospital, China Medical University Taichung
404 Taiwan
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38
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Choy KW, Lau YS, Murugan D, Mustafa MR. Chronic treatment with paeonol improves endothelial function in mice through inhibition of endoplasmic reticulum stress-mediated oxidative stress. PLoS One 2017; 12:e0178365. [PMID: 28562691 PMCID: PMC5451063 DOI: 10.1371/journal.pone.0178365] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/11/2017] [Indexed: 02/06/2023] Open
Abstract
Endoplasmic reticulum (ER) stress leads to endothelial dysfunction which is commonly associated in the pathogenesis of several cardiovascular diseases. We explored the vascular protective effects of chronic treatment with paeonol (2'-hydroxy-4'-methoxyacetophenone), the major compound from the root bark of Paeonia suffruticosa on ER stress-induced endothelial dysfunction in mice. Male C57BL/6J mice were injected intraperitoneally with ER stress inducer, tunicamycin (1 mg/kg/week) for 2 weeks to induce ER stress. The animals were co-administered with or without paeonol (20 mg/kg/oral gavage), reactive oxygen species (ROS) scavenger, tempol (20 mg/kg/day) or ER stress inhibitor, tauroursodeoxycholic acid (TUDCA, 150 mg/kg/day) respectively. Blood pressure and body weight were monitored weekly and at the end of treatment, the aorta was isolated for isometric force measurement. Protein associated with ER stress (GRP78, ATF6 and p-eIF2α) and oxidative stress (NOX2 and nitrotyrosine) were evaluated using Western blotting. Nitric oxide (NO) bioavailability were determined using total nitrate/nitrite assay and western blotting (phosphorylation of eNOS protein). ROS production was assessed by en face dihydroethidium staining and lucigenin-enhanced chemiluminescence assay, respectively. Our results revealed that mice treated with tunicamycin showed an increased blood pressure, reduction in body weight and impairment of endothelium-dependent relaxations (EDRs) of aorta, which were ameliorated by co-treatment with either paeonol, TUDCA and tempol. Furthermore, paeonol reduced the ROS level in the mouse aorta and improved NO bioavailability in tunicamycin treated mice. These beneficial effects of paeonol observed were comparable to those produced by TUDCA and tempol, suggesting that the actions of paeonol may involve inhibition of ER stress-mediated oxidative stress pathway. Taken together, the present results suggest that chronic treatment with paeonol preserved endothelial function and normalized blood pressure in mice induced by tunicamycin in vivo through the inhibition of ER stress-associated ROS.
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Affiliation(s)
- Ker Woon Choy
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Yeh Siang Lau
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Dharmani Murugan
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohd Rais Mustafa
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
- * E-mail:
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Li J, Liu X, Fang Q, Ding M, Li C. Liraglutide attenuates atherosclerosis via inhibiting ER-induced macrophage derived microvesicles production in T2DM rats. Diabetol Metab Syndr 2017; 9:94. [PMID: 29213335 PMCID: PMC5710066 DOI: 10.1186/s13098-017-0289-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 11/01/2017] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND We investigated the effects of liraglutide on the formation and progression of atherosclerosis in type 2 diabetes mellitus (T2DM) rats. METHODS Sprague-Dawley rats were divided into control group, diabetes group and liraglutide treated group. The T2DM rats model with atherosclerosis were induced by high fat diet followed small dosage streptozotocin injection. Body weight and blood glucose levels were monitored once a week for 3 months and then the rats were sacrificed.Peripheral blood and aorta tissues were collected for further biochemical and pathological estimation respectively. Moreover, immunohistochemistry staining was used to detect the infiltration of macrophages and cell apoptosis in tissue samples. The amount of microvesicles of atherosclerotic plaques was determined by ELISA. Western blot was applied to detect the protein expressions of CHOP, GRP78 and caspase-3 in tissue samples. The mRNA expressions of SREBP-1c and FAS were detected by RT-PCR. RESULTS The rat model of diabetic atherosclerosis was established successfully. Compared with the control group, glucose, triglycerides, total cholesterol, AST, ALT, BUN, fasting insulin and homeostatic model assessment insulin resistance levels in peripheral blood were significantly increased in the diabetes group. While, these indicators in the liraglutide group were significantly lower than that in the diabetes group. Moreover, the atherosclerotic plaques were observed in the rats of diabetes group but not remarkable in the liraglutide group. The ratio between aorta intima and media thickness was significantly greater in the diabetes group than that in the liraglutide group. Compared with the diabetes group, the infiltration and apoptosis of macrophages were milder in the liraglutide group. The expressions of CD68, caspase-3, CHOP and GRP78 in aorta tissue samples were significantly downregulated in the liraglutide group than that in the diabetes group. Furthermore, the microvesicles of aorta tissues in the liraglutide group were significantly decreased than that in the diabetes group. The mRNA expressions of SREBP-1c and FAS were lower in the liraglutide group than that in the diabetes group. CONCLUSION Liraglutide attenuates diabetic atherosclerosis by inhibition of ER stress and subsequent macrophage apoptosis and microvesicles production in T2DM rats.
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Affiliation(s)
- Jinjin Li
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, No. 22, Qixiangtai Road, Tianjin, 300070 People’s Republic of China
| | - Xiaojuan Liu
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, No. 22, Qixiangtai Road, Tianjin, 300070 People’s Republic of China
| | - Qianhua Fang
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, No. 22, Qixiangtai Road, Tianjin, 300070 People’s Republic of China
| | - Min Ding
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, No. 22, Qixiangtai Road, Tianjin, 300070 People’s Republic of China
| | - Chunjun Li
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, No. 22, Qixiangtai Road, Tianjin, 300070 People’s Republic of China
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