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Li Y, Ye Z, Zhao Y, Xu B, Xue W, Wang Z, An R, Wang F, Wu R. Ling-gui-zhu-gan granules reduces obesity and ameliorates metabolic disorders by inducing white adipose tissue browning in obese mice. Front Physiol 2024; 15:1427722. [PMID: 39156823 PMCID: PMC11329929 DOI: 10.3389/fphys.2024.1427722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Accepted: 07/17/2024] [Indexed: 08/20/2024] Open
Abstract
Background Ling-gui-zhu-gan (LGZG) formula has been demonstrated to effectively ameliorate the clinical symptoms of patients with obesity or metabolic syndrome. This study aimed to explore both the effect and the underlying mechanisms of LGZG against obesity. Methods Male C57BL/6N mice were randomized into four groups (n = 8): normal control (NC), obese (OB), metformin (Met), and LGZG. After 8 weeks of gavage administration, the pharmacological effects of LGZG on obesity and metabolism were investigated using biochemical parameters, histomorphological examination, and lipidomics techniques. Pivotal factors associated with white adipose tissue browning were evaluated using quantitative real-time polymerase chain reaction and western blotting. Results The results revealed that LGZG reduced the levels of obesity markers, including body weights, body fat mass and food intake in obese mice. Further evaluations highlighted that LGZG restored glucose homeostasis and significantly improved insulin sensitivity in obese mice. Importantly, LGZG could adjust serum lipid profiles and regulate the lipidomic spectrum of intestinal contents, with noticeable shifts in the levels of certain lipids, particularly diacylglycerols and monoacylglycerols. Histopathological examinations of LGZG-treated mice also revealed more favorable adipose tissue structures than their obese counterparts. Furthermore, we found that LGZG upregulated the expression of several key thermogenesis-related factors, such as UCP1, PRDM16, PGC-1α, PPARα, PPARγ, CTBP1, and CTBP2 in white adipose tissues. Conclusion Our findings position LGZG as a novel strategy for preventing obesity and improving metabolic health.
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Affiliation(s)
- Yuxiu Li
- Department of Endocrinology, Guang’anmen Hospital South Campus, China Academy of Chinese Medical Sciences, Beijing, China
| | - Zimengwei Ye
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Yi Zhao
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Bingrui Xu
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Wanying Xue
- College of Integrative Chinese and Western Medicine, Anhui University of Chinese Medicine, Hefei, China
| | - Zhufeng Wang
- Department of Endocrinology, Guang’anmen Hospital South Campus, China Academy of Chinese Medical Sciences, Beijing, China
| | - Ran An
- Department of Endocrinology, Guang’anmen Hospital South Campus, China Academy of Chinese Medical Sciences, Beijing, China
| | - Fan Wang
- Department of Endocrinology, Guang’anmen Hospital South Campus, China Academy of Chinese Medical Sciences, Beijing, China
| | - Rui Wu
- Department of Endocrinology, Guang’anmen Hospital South Campus, China Academy of Chinese Medical Sciences, Beijing, China
- Department of Endocrinology, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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Ferreira G, Vieira P, Alves A, Nunes S, Preguiça I, Martins-Marques T, Ribeiro T, Girão H, Figueirinha A, Salgueiro L, Pintado M, Gomes P, Viana S, Reis F. Effect of Blueberry Supplementation on a Diet-Induced Rat Model of Prediabetes-Focus on Hepatic Lipid Deposition, Endoplasmic Stress Response and Autophagy. Nutrients 2024; 16:513. [PMID: 38398840 PMCID: PMC10892331 DOI: 10.3390/nu16040513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/06/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024] Open
Abstract
Blueberries, red fruits enriched in polyphenols and fibers, are envisaged as a promising nutraceutical intervention in a plethora of metabolic diseases. Prediabetes, an intermediate state between normal glucose tolerance and type 2 diabetes, fuels the development of complications, including hepatic steatosis. In previous work, we have demonstrated that blueberry juice (BJ) supplementation benefits glycemic control and lipid profile, which was accompanied by an amelioration of hepatic mitochondrial bioenergetics. The purpose of this study is to clarify the impact of long-term BJ nutraceutical intervention on cellular mechanisms that govern hepatic lipid homeostasis, namely autophagy and endoplasmic reticulum (ER) stress, in a rat model of prediabetes. Two groups of male Wistar rats, 8-weeks old, were fed a prediabetes-inducing high-fat diet (HFD) and one group was fed a control diet (CD). From the timepoint where the prediabetic phenotype was achieved (week 16) until the end of the study (week 24), one of the HFD-fed groups was daily orally supplemented with 25 g/kg body weight (BW) of BJ (HFD + BJ). BW, caloric intake, glucose tolerance and insulin sensitivity were monitored throughout the study. The serum and hepatic lipid contents were quantified. Liver and interscapular brown and epidydimal white adipose tissue depots (iBAT and eWAT) were collected for histological analysis and to assess thermogenesis, ER stress and autophagy markers. The gut microbiota composition and the short-chain fatty acids (SCFAs) content were determined in colon fecal samples. BJ supplementation positively impacted glycemic control but was unable to prevent obesity and adiposity. BJ-treated animals presented a reduction in fecal SCFAs, increased markers of arrested iBAT thermogenesis and energy expenditure, together with an aggravation of HFD-induced lipotoxicity and hepatic steatosis, which were accompanied by the inhibition of autophagy and ER stress responses in the liver. In conclusion, despite the improvement of glucose tolerance, BJ supplementation promoted a major impact on lipid management mechanisms at liver and AT levels in prediabetic animals, which might affect disease course.
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Affiliation(s)
- Gonçalo Ferreira
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
| | - Pedro Vieira
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
- Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, Pharmacy, 3045-043 Coimbra, Portugal
| | - André Alves
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
| | - Sara Nunes
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
- Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, Pharmacy, 3045-043 Coimbra, Portugal
| | - Inês Preguiça
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
| | - Tânia Martins-Marques
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
| | - Tânia Ribeiro
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (T.R.); (M.P.)
| | - Henrique Girão
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
| | - Artur Figueirinha
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (A.F.); (L.S.)
- LAQV, REQUIMTE, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Lígia Salgueiro
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (A.F.); (L.S.)
- CERES, Chemical Engineering and Renewable Resources for Sustainability, Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal
| | - Manuela Pintado
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (T.R.); (M.P.)
| | - Pedro Gomes
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
- Department of Biomedicine, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Sofia Viana
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
- Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, Pharmacy, 3045-043 Coimbra, Portugal
| | - Flávio Reis
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (G.F.); (P.V.); (A.A.); (S.N.); (I.P.); (T.M.-M.); (H.G.); (P.G.); (S.V.)
- CIBB—Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004–504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-531 Coimbra, Portugal
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Xue R, Xiao H, Kumar V, Lan X, Malhotra A, Singhal PC, Chen J. The Molecular Mechanism of Renal Tubulointerstitial Inflammation Promoting Diabetic Nephropathy. Int J Nephrol Renovasc Dis 2023; 16:241-252. [PMID: 38075191 PMCID: PMC10710217 DOI: 10.2147/ijnrd.s436791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 11/30/2023] [Indexed: 02/12/2024] Open
Abstract
Diabetic nephropathy (DN) is a common complication affecting many diabetic patients, leading to end-stage renal disease. However, its pathogenesis still needs to be fully understood to enhance the effectiveness of treatment methods. Traditional theories are predominantly centered on glomerular injuries and need more explicit explanations of recent clinical observations suggesting that renal tubules equally contribute to renal function and that tubular lesions are early features of DN, even occurring before glomerular lesions. Although the conventional view is that DN is not an inflammatory disease, recent studies indicate that systemic and local inflammation, including tubulointerstitial inflammation, contributes to the development of DN. In patients with DN, intrinsic tubulointerstitial cells produce many proinflammatory factors, leading to medullary inflammatory cell infiltration and activation of inflammatory cells in the interstitial region. Therefore, understanding the molecular mechanism of renal tubulointerstitial inflammation contributing to DN injury is of great significance and will help further identify key factors regulating renal tubulointerstitial inflammation in the high glucose environment. This will aid in developing new targets for DN diagnosis and treatment and expanding new DN treatment methods.
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Affiliation(s)
- Rui Xue
- Affiliated Mental Health Center & Hangzhou Seventh People’s Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310000, People’s Republic of China
| | - Haiting Xiao
- Key Laboratory of Luzhou City for Aging Medicine, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, People’s Republic of China
| | - Vinod Kumar
- Department of Dermatology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Xiqian Lan
- Key Laboratory of Luzhou City for Aging Medicine, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, People’s Republic of China
| | - Ashwani Malhotra
- Feinstein Institute for Medical Research and Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY, 11030, USA
| | - Pravin C Singhal
- Feinstein Institute for Medical Research and Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY, 11030, USA
| | - Jianning Chen
- Affiliated Mental Health Center & Hangzhou Seventh People’s Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310000, People’s Republic of China
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Kaneko YK, Morioka A, Sano M, Tashiro M, Watanabe N, Kasahara N, Nojiri M, Ishiwatari C, Ichinose K, Minami A, Suzuki T, Yamaguchi M, Kimura T, Ishikawa T. Asymmetric dimethylarginine accumulation under hyperglycemia facilitates β-cell apoptosis via inhibiting nitric oxide production. Biochem Biophys Res Commun 2022; 637:108-116. [DOI: 10.1016/j.bbrc.2022.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 10/28/2022] [Accepted: 11/06/2022] [Indexed: 11/10/2022]
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Ye Z, Ma J, Liu Y, Xu B, Dai X, Fu M, Tian T, Sui X, Mo F, Gao S, Zhao D, Zhang D. Jiangtang Sanhao formula ameliorates skeletal muscle insulin resistance via regulating GLUT4 translocation in diabetic mice. Front Pharmacol 2022; 13:950535. [PMID: 36160420 PMCID: PMC9492927 DOI: 10.3389/fphar.2022.950535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 08/12/2022] [Indexed: 11/16/2022] Open
Abstract
Jiangtang Sanhao formula (JTSHF), one of the prescriptions for treating the patients with diabetes mellitus (DM) in traditional Chinese medicine clinic, has been demonstrated to effectively ameliorate the clinical symptoms of diabetic patients with overweight or hyperlipidemia. The preliminary studies demonstrated that JTSHF may enhance insulin sensitivity and improve glycolipid metabolism in obese mice. However, the action mechanism of JTSHF on skeletal muscles in diabetic mice remains unclear. To this end, high-fat diet (HFD) and streptozotocin (STZ)-induced diabetic mice were subjected to JTSHF intervention. The results revealed that JTSHF granules could reduce food and water intake, decrease body fat mass, and improve glucose tolerance, lipid metabolism, and insulin sensitivity in the skeletal muscles of diabetic mice. These effects may be linked to the stimulation of GLUT4 expression and translocation via regulating AMPKα/SIRT1/PGC-1α signaling pathway. The results may offer a novel explanation of JTSHF to prevent against diabetes and IR-related metabolic diseases.
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Affiliation(s)
- Zimengwei Ye
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Jinkun Ma
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Yage Liu
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Bingrui Xu
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Xuan Dai
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Min Fu
- Research Institute of McGill University Health Center, McGill University, Montreal, QC, Canada
| | - Tian Tian
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Xin Sui
- Information and Educational Technology Center, Beijing University of Chinese Medicine, Beijing, China
| | - Fangfang Mo
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Sihua Gao
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Dandan Zhao
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- *Correspondence: Dandan Zhao, ; Dongwei Zhang,
| | - Dongwei Zhang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- *Correspondence: Dandan Zhao, ; Dongwei Zhang,
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Naz I, Khan MR, Zai JA, Batool R, Zahra Z, Tahir A. Pilea umbrosa ameliorate CCl 4 induced hepatic injuries by regulating endoplasmic reticulum stress, pro-inflammatory and fibrosis genes in rat. Environ Health Prev Med 2020; 25:53. [PMID: 32917140 PMCID: PMC7488709 DOI: 10.1186/s12199-020-00893-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 09/01/2020] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Pilea umbrosa (Urticaceae) is used by local communities (district Abbotabad) for liver disorders, as anticancer, in rheumatism and in skin disorders. METHODS Methanol extract of P. umbrosa (PUM) was investigated for the presence of polyphenolic constituents by HPLC-DAD analysis. PUM (150 mg/kg and 300 mg/kg) was administered on alternate days for eight weeks in rats exposed with carbon tetrachloride (CCl4). Serum analysis was performed for liver function tests while in liver tissues level of antioxidant enzymes and biochemical markers were also studied. In addition, semi quantitative estimation of antioxidant genes, endoplasmic reticulum (ER) induced stress markers, pro-inflammatory cytokines and fibrosis related genes were carried out on liver tissues by RT-PCR analysis. Liver tissues were also studied for histopathological injuries. RESULTS Level of antioxidant enzymes such as catalase (CAT), superoxide dismutase (SOD), peroxidase (POD) and glutathione (GSH) decreased (p < 0.05) whereas level of thiobarbituric acid reactive substance (TBARS), H2O2 and nitrite increased in liver tissues of CCl4 treated rat. Likewise increase in the level of serum markers; alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP) and total bilirubin was observed. Moreover, CCl4 caused many fold increase in expression of ER stress markers; glucose regulated protein (GRP-78), x-box binding protein1-total (XBP-1 t), x-box binding protein1-unspliced (XBP-1 u) and x-box binding protein1-spliced (XBP-1 s). The level of inflammatory mediators such as tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and monocyte chemoattractant protein-1 (MCP-1) was aggregated whereas suppressed the level of antioxidant enzymes; γ-glutamylcysteine ligase (GCLC), protein disulfide isomerase (PDI) and nuclear erythroid 2 p45-related factor 2 (Nrf-2). Additionally, level of fibrosis markers; transforming growth factor-β (TGF-β), Smad-3 and collagen type 1 (Col1-α) increased with CCl4 induced liver toxicity. Histopathological scrutiny depicted damaged liver cells, neutrophils infiltration and dilated sinusoids in CCl4 intoxicated rats. PUM was enriched with rutin, catechin, caffeic acid and apigenin as evidenced by HPLC analysis. Simultaneous administration of PUM and CCl4 in rats retrieved the normal expression of these markers and prevented hepatic injuries. CONCLUSION Collectively these results suggest that PUM constituted of strong antioxidant chemicals and could be a potential therapeutic agent for stress related liver disorders.
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Affiliation(s)
- Irum Naz
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Muhammad Rashid Khan
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Jawaid Ahmed Zai
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Riffat Batool
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Zartash Zahra
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Aemin Tahir
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan
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Xiong Y, Hai CX, Fang WJ, Lei YP, Li XM, Zhou XK. Endogenous asymmetric dimethylarginine accumulation contributes to the suppression of myocardial mitochondrial biogenesis in type 2 diabetic rats. Nutr Metab (Lond) 2020; 17:72. [PMID: 32855652 PMCID: PMC7445927 DOI: 10.1186/s12986-020-00486-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 07/31/2020] [Indexed: 01/29/2023] Open
Abstract
Background Suppressed mitochondrial biosynthesis has been reported to be the early signal of mitochondrial dysfunction which contributes to diabetic cardiomyopathy, but the mechanism of mitochondrial biosynthesis suppression is unclear. Nitric oxide synthase inhibitor asymmetric dimethylarginine (ADMA) is closely related to diabetic cardiovascular complications. This study was to determine whether endogenous ADMA accumulation was involved in the suppression of myocardial mitochondrial biogenesis in diabetic rats and to elucidate the potential mechanism in rat cardiomyocytes. Methods Type 2 diabetic rat model was induced by high-fat feeding plus single intraperitoneal injection of small dose streptozotocin (35 mg/kg). The copy number ratio of mitochondrial gene to nuclear gene was measured to reflect mitochondrial biogenesis. The promoter activity of peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) and its post-translational modifications were detected by dual-luciferase reporter assay and immunoprecipitation. Results Myocardial ADMA content was enhanced and associated with suppressions of myocardial mitochondrial biogenesis and cardiac function in parallel with PGC-1α downregulation and uncoupling protein 2 (UCP2) upregulation in the myocardium of diabetic rats compared with control rats. Similarly, ADMA and its homolog could inhibit myocardial mitochondrial biogenesis and PGC-1α expression, increase UCP2 expression and oxidative stress in vitro and in vivo. Moreover, ADMA also suppressed the promoter activity and PGC-1α expression but boosting its protein acetylation and phosphorylation in rat cardiomyocytes. Conclusions These results indicate that endogenous ADMA accumulation contributes to suppression of myocardial mitochondrial biogenesis in type 2 diabetic rats. The underlying mechanisms may be associated with reducing PGC-1α promoter activity and expression but boosting its protein acetylation and phosphorylation.
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Affiliation(s)
- Yan Xiong
- Department of Central Laboratory, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700 Guangdong China.,Guangzhou Institute of Snake Venom Research, Guangzhou Medical University, Guangzhou, 511436 Guangdong China.,Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha, 410078 Hunan China
| | - Chun-Xia Hai
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha, 410078 Hunan China
| | - Wei-Jin Fang
- Guangzhou Institute of Snake Venom Research, Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Yan-Ping Lei
- Guangzhou Institute of Snake Venom Research, Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Xiao-Mei Li
- Department of Central Laboratory, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700 Guangdong China.,Guangzhou Institute of Snake Venom Research, Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Xin-Ke Zhou
- Department of Central Laboratory, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700 Guangdong China
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Thi Dong N, Thanh Huong P. AMPK-mediatedhy Poglycemic Effect of Banana Stem Juice on Type 2 Diabetes. ACTA ACUST UNITED AC 2020. [DOI: 10.13005/bbra/2812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fahmy SR, Sayed DA, Soliman AM, Almortada NY, Aal WEAE. Protective effect of Echinochrome against intrahepatic cholestasis induced by alpha-naphthylisothiocyanate in rats. BRAZ J BIOL 2020; 80:102-111. [DOI: 10.1590/1519-6984.192697] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 11/10/2018] [Indexed: 12/20/2022] Open
Abstract
Abstract The present study was designed to evaluate the protective effects of echinochrome (Ech) on intrahepatic cholestasis in rats induced by a single (i.p.) injection of alpha-naphthylisothiocyanate (ANIT) (75 mg/kg body weight). The rats were pre-treated orally for 48hr (one dose / 24hr) with Ech (1, 5 and 10 mg/kg body weight) or ursodeoxycholic acid (UDCA) 80 mg/kg body weight drug then, injected with ANIT. ANIT markedly increased serum activities of alanine amino transaminase (ALT), aspartate amino transaminase (AST) and alkaline phosphatase (ALP), which was accompanied by a massive inflammation of epithelial cells on bile duct at 24h after ANIT injection. ANIT also increased the levels of total protein (TP), total bilirubin (TB), direct bilirubin (DB), indirect bilirubin (IB), however decrease albumin content (ALB). In addition ANIT increased hepatic MDA and NO level and decreased GSH level and GST activity. The Ech exerted hepatoprotective and anticholestatic effects as assessed by a significant decrease in the activities of serum AST, ALT and ALP, and the levels of TP, TB, DB and IB as well as liver MDA level and NO level. In conclusion, Ech was found to possess hepatoprotective effect against intrahepatic cholestasis induced by hepatotoxin such as ANIT.
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Coregulation of endoplasmic reticulum stress and oxidative stress in neuropathic pain and disinhibition of the spinal nociceptive circuitry. Pain 2018; 159:894-906. [DOI: 10.1097/j.pain.0000000000001161] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Guo W, Diao Z, Liu W. Asymmetric dimethylarginine downregulates sarco/endoplasmic reticulum calcium‑ATPase 3 and induces endoplasmic reticulum stress in human umbilical vein endothelial cells. Mol Med Rep 2017; 16:7541-7547. [PMID: 28944875 PMCID: PMC5865888 DOI: 10.3892/mmr.2017.7529] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 09/06/2017] [Indexed: 12/17/2022] Open
Abstract
Cardiovascular disease is the leading cause of mortality in patients with chronic kidney disease. Endothelial cell injury and apoptosis may promote atherosclerosis and cardiovascular disease. The present study investigated the potential mechanisms of asymmetric dimethylarginine (ADMA)‑induced apoptosis in human umbilical vein endothelial cells (HUVECs). It was demonstrated that ADMA decreased B‑cell lymphoma‑2 expression and increased cleaved‑caspase‑3 expression. Furthermore, terminal deoxynucleotidyl transferase (TdT)‑mediated‑digoxigenin‑11‑dUTP nick end labeling results indicated that ADMA induced apoptosis in HUVECs. These results suggest a potential mechanism of ADMA‑induced endothelial cell injury. It was also verified that ADMA induced the expression of phosphorylated protein kinase RNA‑like ER kinase, inositol requiring enzyme‑1, C/EBP homologous protein and glucose‑regulated protein, indicating activation of the endoplasmic reticulum (ER) stress response. Impaired function of sarco/endoplasmic reticulum calcium‑ATPase (SERCA) is considered a major contributor to ER stress. It was demonstrated that ADMA induced a significant downregulation of SERCA3, however not SERCA2b. Overall, the results indicated that ADMA induced apoptosis in HUVECs, and that this effect was closely associated with induction of ER stress and decreased SERCA3 expression.
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Affiliation(s)
- Weikang Guo
- Department of Nephrology, Beijing Friendship Hospital, Faculty of Kidney Diseases, Capital Medical University, Beijing 100050, P.R. China
| | - Zongli Diao
- Department of Nephrology, Beijing Friendship Hospital, Faculty of Kidney Diseases, Capital Medical University, Beijing 100050, P.R. China
| | - Wenhu Liu
- Department of Nephrology, Beijing Friendship Hospital, Faculty of Kidney Diseases, Capital Medical University, Beijing 100050, P.R. China
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12
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Pyrrolidine dithiocarbamate ameliorates endothelial dysfunction in thoracic aorta of diabetic rats by preserving vascular DDAH activity. PLoS One 2017; 12:e0179908. [PMID: 28715444 PMCID: PMC5513417 DOI: 10.1371/journal.pone.0179908] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 06/07/2017] [Indexed: 01/27/2023] Open
Abstract
Objective Endothelial dysfunction plays a pivotal role in the development of diabetic cardiovascular complications. Accumulation of endogenous nitric oxide synthase (NOS) inhibitor asymmetric dimethylarginine (ADMA) and inhibition of dimethylarginine dimethylaminohydrolase (DDAH) activity have been involved in diabetic endothelial dysfunction. This study was to investigate the effect of pyrrolidine dithiocarbamate (PDTC) on impairment of endothelium-dependent vasodilatation in diabetic rats and its potential mechanism. Methods Diabetic rats were induced by a single intraperitoneal injection of streptozotocin (60mg/kg), and PDTC (10mg/kg) was given in drinking water for 8 weeks. Blood glucose and serum ADMA concentrations were measured in experimental rats. Recombinant adenovirus encoding human DDAH2 gene were constructed and ex vivo transferred to isolated rat aortas. The maximal relaxation (Emax) and half maximal effective concentration (EC50) of aortic rings response to accumulative concentrations of acetylcholine and vascular DDAH activity were examined before and after gene transfection. Results Diabetic rats displayed significant elevations of blood glucose and serum ADMA levels compared to control group (P<0.01). Vascular DDAH activity and endothelium-dependent relaxation of aortas were inhibited, as expressed by the decreased Emax and increased EC50 in diabetic rats compared to control rats (P<0.01). Treatment with PDTC not only decreased blood glucose and serum ADMA concentration (P<0.01) but also restored vascular DDAH activity and endothelium-dependent relaxation, evidenced by the higher Emax and lower EC50 in PDTC-treated diabetic rats compared to untreated diabetic rats (P<0.01). Similar restoration of Emax, EC50 and DDAH activity were observed in diabetic aortas after DDAH2-gene transfection. Conclusions These results indicate that PDTC could ameliorate impairment of endothelium-dependent relaxation in diabetic rats. The underlying mechanisms might be related to preservation of vascular DDAH activity and consequent reduction of endogenous ADMA in endothelium via its antioxidant action. This study highlights the therapeutic potential of PDTC in impaired vasodilation and provides a new strategy for treatment of diabetic cardiovascular complications.
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13
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Li T, Feng R, Zhao C, Wang Y, Wang J, Liu S, Cao J, Wang H, Wang T, Guo Y, Lu Z. Dimethylarginine Dimethylaminohydrolase 1 Protects Against High-Fat Diet-Induced Hepatic Steatosis and Insulin Resistance in Mice. Antioxid Redox Signal 2017; 26:598-609. [PMID: 27565538 DOI: 10.1089/ars.2016.6742] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
AIMS High plasma concentrations of asymmetric dimethylarginine (ADMA), an endogenous nitric oxide synthase inhibitor, are associated with hepatic dysfunction in patients with nonalcoholic fatty liver disease (NAFLD). However, it is unknown whether ADMA is involved in the pathogenesis of NAFLD. Dimethylarginine dimethylaminohydrolase 1 (DDAH1) is an enzyme that degrades ADMA. In this study, we used Ddah1-/- mice to investigate the effects of the ADMA/DDAH1 pathway on high-fat diet (HFD)-induced hepatic steatosis. RESULTS After HFD feeding for 20 weeks, Ddah1-/- mice were more obese and had developed more severe hepatic steatosis and worse insulin resistance compared with wild-type (WT) mice. In the livers of HFD-fed mice, loss of DDAH1 resulted in higher levels of lipogenic genes, lower expression of β-oxidation genes, and greater induction of oxidative stress, endoplasmic reticulum stress, and inflammation than in the WT livers. Furthermore, ADMA treatment in HepG2 cells led to oxidative stress and steatosis, whereas overexpression of DDAH1 attenuated palmitic acid-induced steatosis, oxidative stress, and inflammation. Innovation and Conclusion: Our results provide the first direct evidence that the ADMA/DDAH1 pathway has a marked effect on hepatic lipogenesis and steatosis induced by HFD feeding. Our findings suggest that strategies to increase DDAH1 activity in hepatocytes may provide a novel approach to attenuate NAFLD development. Antioxid. Redox Signal. 26, 598-609.
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Affiliation(s)
- Tianhe Li
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Run Feng
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Chenyang Zhao
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Yue Wang
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Jian Wang
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Shasha Liu
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Jianwei Cao
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Hongyun Wang
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Ting Wang
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Yuting Guo
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
| | - Zhongbing Lu
- College of Life Science, University of Chinese Academy of Sciences , Beijing, China
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14
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Balakumar M, Raji L, Prabhu D, Sathishkumar C, Prabu P, Mohan V, Balasubramanyam M. High-fructose diet is as detrimental as high-fat diet in the induction of insulin resistance and diabetes mediated by hepatic/pancreatic endoplasmic reticulum (ER) stress. Mol Cell Biochem 2016; 423:93-104. [PMID: 27699590 DOI: 10.1007/s11010-016-2828-5] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Accepted: 09/22/2016] [Indexed: 01/05/2023]
Abstract
In the context of high human consumption of fructose diets, there is an imperative need to understand how dietary fructose intake influence cellular and molecular mechanisms and thereby affect β-cell dysfunction and insulin resistance. While evidence exists for a relationship between high-fat-induced insulin resistance and metabolic disorders, there is lack of studies in relation to high-fructose diet. Therefore, we attempted to study the effect of different diets viz., high-fat diet (HFD), high-fructose diet (HFS), and a combination (HFS + HFD) diet on glucose homeostasis and insulin sensitivity in male Wistar rats compared to control animals fed with normal pellet diet. Investigations include oral glucose tolerance test, insulin tolerance test, histopathology by H&E and Masson's trichrome staining, mRNA expression by real-time PCR, protein expression by Western blot, and caspase-3 activity by colorimetry. Rats subjected to high-fat/fructose diets became glucose intolerant, insulin-resistant, and dyslipidemic. Compared to control animals, rats subjected to different combination of fat/fructose diets showed increased mRNA and protein expression of a battery of ER stress markers both in pancreas and liver. Transcription factors of β-cell function (INSIG1, SREBP1c and PDX1) as well as hepatic gluconeogenesis (FOXO1 and PEPCK) were adversely affected in diet-induced insulin-resistant rats. The convergence of chronic ER stress towards apoptosis in pancreas/liver was also indicated by increased levels of CHOP mRNA & increased activity of both JNK and Caspase-3 in rats subjected to high-fat/fructose diets. Our study exposes the experimental support in that high-fructose diet is equally detrimental in causing metabolic disorders.
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Affiliation(s)
- M Balakumar
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialties Centre, WHO Collaborating Centre for Non-Communicable Diseases Prevention & Control, Gopalapuram, Chennai, 600086, India
| | - L Raji
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialties Centre, WHO Collaborating Centre for Non-Communicable Diseases Prevention & Control, Gopalapuram, Chennai, 600086, India
| | - D Prabhu
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialties Centre, WHO Collaborating Centre for Non-Communicable Diseases Prevention & Control, Gopalapuram, Chennai, 600086, India
| | - C Sathishkumar
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialties Centre, WHO Collaborating Centre for Non-Communicable Diseases Prevention & Control, Gopalapuram, Chennai, 600086, India
| | - P Prabu
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialties Centre, WHO Collaborating Centre for Non-Communicable Diseases Prevention & Control, Gopalapuram, Chennai, 600086, India
| | - V Mohan
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialties Centre, WHO Collaborating Centre for Non-Communicable Diseases Prevention & Control, Gopalapuram, Chennai, 600086, India
| | - M Balasubramanyam
- Department of Cell and Molecular Biology and Dr. Rema Mohan High-Throughput Screening (HTS) Lab, Madras Diabetes Research Foundation & Dr. Mohan's Diabetes Specialties Centre, WHO Collaborating Centre for Non-Communicable Diseases Prevention & Control, Gopalapuram, Chennai, 600086, India.
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15
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Musso G, Cassader M, Cohney S, Pinach S, Saba F, Gambino R. Emerging Liver-Kidney Interactions in Nonalcoholic Fatty Liver Disease. Trends Mol Med 2016; 21:645-662. [PMID: 26432021 DOI: 10.1016/j.molmed.2015.08.005] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 08/07/2015] [Accepted: 08/16/2015] [Indexed: 12/12/2022]
Abstract
Mounting evidence connects non-alcoholic fatty liver disease (NAFLD) to chronic kidney disease (CKD). We review emerging mechanistic links between NAFLD and CKD, including altered activation of angiotensin converting enzyme (ACE)-2, nutrient/energy sensors sirtuin-1 and AMP-activated kinase, as well as impaired antioxidant defense mediated by nuclear factor erythroid 2-related factor-2 (Nrf2). Dietary fructose excess may also contribute to NAFLD and CKD. NAFLD affects renal injury through lipoprotein dysmetabolism and altered secretion of the hepatokines fibroblast growth factor-21, fetuin-A, insulin-like growth factor-1, and syndecan-1. CKD may mutually aggravate NAFLD and associated metabolic disturbances through altered intestinal barrier function and microbiota composition, the accumulation of uremic toxic metabolites, and alterations in pre-receptor glucocorticoid metabolism. We conclude by discussing the implications of these findings for the treatment of NAFLD and CKD.
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Affiliation(s)
| | - Maurizio Cassader
- Department of Medical Sciences, San Giovanni Battista Hospital, University of Turin, Turin, Italy
| | - Solomon Cohney
- Department of Nephrology, Royal Melbourne and Western Hospital, Victoria, University of Melbourne, Melbourne, Australia
| | - Silvia Pinach
- Department of Medical Sciences, San Giovanni Battista Hospital, University of Turin, Turin, Italy
| | - Francesca Saba
- Department of Medical Sciences, San Giovanni Battista Hospital, University of Turin, Turin, Italy
| | - Roberto Gambino
- Department of Medical Sciences, San Giovanni Battista Hospital, University of Turin, Turin, Italy
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16
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Di Pasqua LG, Berardo C, Rizzo V, Richelmi P, Croce AC, Vairetti M, Ferrigno A. MCD diet-induced steatohepatitis is associated with alterations in asymmetric dimethylarginine (ADMA) and its transporters. Mol Cell Biochem 2016; 419:147-55. [PMID: 27357826 DOI: 10.1007/s11010-016-2758-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 06/21/2016] [Indexed: 12/11/2022]
Abstract
Using an experimental model of NASH induced by a methionine-choline-deficient (MCD) diet, we investigated whether changes occur in serum and tissue levels of asymmetric dimethylarginine (ADMA). Male Wistar rats underwent NASH induced by 8-week feeding with an MCD diet. Serum and hepatic biopsies at 2, 4 and 8 weeks were taken, and serum enzymes, ADMA and nitrate/nitrite (NOx), were evaluated. Hepatic biopsies were used for mRNA and protein expression analysis of dimethylarginine dimethylaminohydrolase-1 (DDAH-1) and protein methyltransferases (PRMT-1), enzymes involved in ADMA metabolism and synthesis, respectively, and ADMA transporters (CAT-1, CAT-2A and CAT-2B). Lipid peroxides (TBARS), glutathione, ATP/ADP and DDAH activity were quantified. An increase in serum AST and ALT was detected in MCD animals. A time-dependent decrease in serum and tissue ADMA and increase in mRNA expression of DDAH-1 and PRMT-1 as well as higher rates of mRNA expression of CAT-1 and lower rates of CAT-2A and CAT-2B were found after 8-week MCD diet. An increase in serum NOx and no changes in protein expression in DDAH-1 and CAT-1 and higher content in CAT-2 and PRMT-1 were found at 8 weeks. Hepatic DDAH activity decreased with a concomitant increase in oxidative stress, as demonstrated by high TBARS levels and low glutathione content. In conclusion, a decrease in serum and tissue ADMA levels in the MCD rats was found associated with a reduction in DDAH activity due to the marked oxidative stress observed. Changes in ADMA levels and its transporters are innovative factors in the onset and progression of hepatic alterations correlated with MCD diet-induced NASH.
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Affiliation(s)
- Laura G Di Pasqua
- Department of Internal Medicine and Therapeutics, University of Pavia, Via Ferrata 9A, 27100, Pavia, Italy
| | - Clarissa Berardo
- Department of Internal Medicine and Therapeutics, University of Pavia, Via Ferrata 9A, 27100, Pavia, Italy
| | - Vittoria Rizzo
- Department of Molecular Medicine, Fondazione IRCCS Policlinico S. Matteo and University of Pavia, Pavia, Italy
| | - Plinio Richelmi
- Department of Internal Medicine and Therapeutics, University of Pavia, Via Ferrata 9A, 27100, Pavia, Italy
| | - Anna Cleta Croce
- Histochemistry and Cytometry Unit, IGM-CNR, c/o Biotechnology and Biology Department, University of Pavia, Pavia, Italy
| | - Mariapia Vairetti
- Department of Internal Medicine and Therapeutics, University of Pavia, Via Ferrata 9A, 27100, Pavia, Italy.
| | - Andrea Ferrigno
- Department of Internal Medicine and Therapeutics, University of Pavia, Via Ferrata 9A, 27100, Pavia, Italy
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17
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Mechanisms of echinochrome potency in modulating diabetic complications in liver. Life Sci 2016; 151:41-49. [PMID: 26947587 DOI: 10.1016/j.lfs.2016.03.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 03/01/2016] [Accepted: 03/02/2016] [Indexed: 02/07/2023]
Abstract
BACKGROUND Diabetes mellitus is one of the most public metabolic disorders. It is mainly classified into type 1 and type 2. Echinochrome is a pigment from sea urchins that has antioxidant, anti-microbial, anti-inflammatory and chelating abilities. AIMS The present study aimed to investigate the anti-diabetic mechanisms of echinochrome pigment in streptozotocin-induced diabetic rats. MAIN METHODS Thirty six male Wistar albino rats were divided into two main groups, type 1 diabetes and type 2 diabetes groups. Each group was divided into 3 subgroups (6 rats/subgroup); control, diabetic and echinochrome groups. Diabetic model was induced by a single dose of streptozotocin (60mg/kg, i.p) for type 1 diabetes and by a high fat diet for 4weeks before the injection with streptozotocin (30mg/kg, i.p) for type 2 diabetes. Diabetic groups were treated orally with echinochrome extract (1mg/kg body weight in 10% DMSO) daily for 4weeks. KEY FINDINGS Echinochrome groups showed a reduction in the concentrations of glucose, MDA and the activities of arginase, AST, ALT, ALP and GGT. While it caused general increase in the levels of insulin, TB, DB, IB, NO and the activities of G6PD, GST, GPx, SOD and GSH. The histopathological investigation showed partial restoration of pancreatic islet cells and clear improvement in the hepatic architecture. SIGNIFICANCE The suggested mechanism of Ech action in the reduction of diabetic complications in liver involved two pathways; through the hypoglycemic activity and the antioxidant role of Ech.
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18
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Pektaş MB, Sadi G, Koca HB, Yuksel Y, Vurmaz A, Koca T, Tosun M. Resveratrol Ameliorates the Components of Hepatic Inflammation and Apoptosis in a Rat Model of Streptozotocin-Induced Diabetes. Drug Dev Res 2016; 77:12-9. [DOI: 10.1002/ddr.21287] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 12/09/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Mehmet Bilgehan Pektaş
- Department of Medical Pharmacology, Faculty of Medicine; Afyon Kocatepe University; Afyonkarahisar Turkey
| | - Gökhan Sadi
- Department of Biology, K.Ö. Science Faculty; Karamanoglu Mehmetbey University; Karaman Turkey
| | - Halit Bugra Koca
- Department of Medical Biochemistry, Faculty of Medicine; Afyon Kocatepe University; Afyonkarahisar Turkey
| | - Yasemin Yuksel
- Department of Histology, Faculty of Medicine; Afyon Kocatepe University; Afyonkarahisar Turkey
| | - Ayhan Vurmaz
- Department of Medical Biochemistry, Faculty of Medicine; Afyon Kocatepe University; Afyonkarahisar Turkey
| | - Tulay Koca
- Department of Medical Laboratory, Ataturk Vocational School of Health Services; Afyon Kocatepe University; Afyonkarahisar and Karaman Turkey
| | - Murat Tosun
- Department of Histology, Faculty of Medicine; Afyon Kocatepe University; Afyonkarahisar Turkey
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19
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Tang Z, Zhang W, Wan C, Xu G, Nie X, Zhu X, Xia N, Zhao Y, Wang S, Cui S, Wang C. TRAM1 protect HepG2 cells from palmitate induced insulin resistance through ER stress-JNK pathway. Biochem Biophys Res Commun 2015; 457:578-84. [PMID: 25600807 DOI: 10.1016/j.bbrc.2015.01.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 01/08/2015] [Indexed: 10/24/2022]
Abstract
Excess serum free fatty acids (FFAs) are fundamental to the pathogenesis of insulin resistance. Chronic endoplasmic reticulum (ER) stress is a major contributor to obesity-induced insulin resistance in the liver. With high-fat feeding (HFD), FFAs can activate chronic endoplasmic reticulum (ER) stress in target tissues, initiating negative crosstalk between FFAs and insulin signaling. However, the molecular link between insulin resistance and ER stress remains to be identified. We here reported that translocating chain-associated membrane protein 1 (TRAM1), an ER-resident membrane protein, was involved in the onset of insulin resistance in hepatocytes. TRAM1 was significantly up-regulated in insulin-resistant liver tissues and palmitate (PA)-treated HepG2 cells. In addition, we showed that depletion of TRAM1 led to hyperactivation of CHOP and GRP78, and the activation of downstream JNK pathway. Given the fact that the activation of ER stress played a facilitating role in insulin resistance, the phosphorylation of Akt and GSK-3β was also analyzed. We found that depletion of TRAM1 markedly attenuated the phosphorylation of Akt and GSK-3β in the cells. Moreover, application with JNK inhibitor SP600125 reversed the effect of TRAM1 interference on Akt phosphorylation. The accumulation of lipid droplets and expression of two key gluconeogenic enzymes, PEPCK and G6Pase, were also determined and found to display a similar tendency with the phosphorylation of Akt. Glucose uptake assay indicated that knocking down TRAM1 augmented PA-induced down-regulation of glucose uptake, and inhibition of JNK using SP600125 could block the effect of TRAM1 on glucose uptake. These data implicated that TRAM1 might protect HepG2 cells against PA-induced insulin resistance through alleviating ER stress.
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Affiliation(s)
- Zhuqi Tang
- Department of Endocrinology, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Wanlu Zhang
- Department of Pathogen Biology, Medical College, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China; Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Chunhua Wan
- Department of Pathogen Biology, Medical College, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China; Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Guangfei Xu
- Department of Pathogen Biology, Medical College, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China; Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Xiaoke Nie
- Department of Pathogen Biology, Medical College, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Xiaohui Zhu
- Department of Endocrinology, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Nana Xia
- Department of Pathogen Biology, Medical College, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China; Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Yun Zhao
- Department of Pathogen Biology, Medical College, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China; Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Suxin Wang
- Department of Pathogen Biology, Medical College, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China; Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Shiwei Cui
- Department of Endocrinology, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu Province, People's Republic of China.
| | - Cuifang Wang
- Department of Endocrinology, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu Province, People's Republic of China.
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