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Mesarosova L, Scheper M, Iyer A, Anink JJ, Mills JD, Aronica E. miR-193b-3p/ PGC-1α pathway regulates an insulin dependent anti-inflammatory response in Parkinson's disease. Neurobiol Dis 2024; 199:106587. [PMID: 38950713 DOI: 10.1016/j.nbd.2024.106587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 06/18/2024] [Accepted: 06/28/2024] [Indexed: 07/03/2024] Open
Abstract
It has been shown that many miRNAs, including miR-193b-3p, are differentially expressed in Parkinson's disease (PD). Dysregulation of miR-193b-3p/PGC-1α axis may alter homeostasis in cells and can induce an inflammatory response commonly accompanied by metabolic disturbances. The aim of the present study is to investigate if dysregulation of the miR-193-3p/PGC-1α axis may contribute to the pathological changes observed in the PD brain. Brain tissue were obtained from middle frontal gyrus of non-demented controls and individuals with a PD diagnosis. RT-qPCR was used to determine the expression of miR-193b-3p and in situ hybridization (ISH) and immunological analysis were employed to establish the cellular distribution of miR-193b-3p. Functional assays were performed using SH-SY5Y cells, including transfection and knock-down of miR-193b-3p. We found significantly lower expression of miR-193b-3p in the early stages of PD (PD4) which increased throughout disease progression. Furthermore, altered expression of PGC-1α suggested a direct inhibitory effect of miR-193b-3p in the brain of individuals with PD. Moreover, we observed changes in expression of insulin after transfection of SH-SY5Y cells with miR-193b-3p, which led to dysregulation in the expression of several pro- or anti - inflammatory genes. Our findings indicate that the miR-193b-3p/PGC-1α axis is involved in the regulation of insulin signaling. This regulation is crucial, since insulin induced inflammatory response may serve as a protective mechanism during acute situations but potentially evolve into a pathological process in chronic conditions. This novel regulatory mechanism may represent an interesting therapeutic target with potential benefits for various neurodegenerative diseases.
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Affiliation(s)
- Lucia Mesarosova
- Amsterdam UMC location University of Amsterdam, Department of (Neuro)Pathology Amsterdam Neuroscience, Meibergdreef 9, Amsterdam, the Netherlands.
| | - Mirte Scheper
- Amsterdam UMC location University of Amsterdam, Department of (Neuro)Pathology Amsterdam Neuroscience, Meibergdreef 9, Amsterdam, the Netherlands
| | - Anand Iyer
- Amsterdam UMC location University of Amsterdam, Department of (Neuro)Pathology Amsterdam Neuroscience, Meibergdreef 9, Amsterdam, the Netherlands; Department of Internal Medicine, Erasmus MC, Rotterdam, the Netherlands
| | - Jasper J Anink
- Amsterdam UMC location University of Amsterdam, Department of (Neuro)Pathology Amsterdam Neuroscience, Meibergdreef 9, Amsterdam, the Netherlands
| | - James D Mills
- Amsterdam UMC location University of Amsterdam, Department of (Neuro)Pathology Amsterdam Neuroscience, Meibergdreef 9, Amsterdam, the Netherlands.
| | - Eleonora Aronica
- Amsterdam UMC location University of Amsterdam, Department of (Neuro)Pathology Amsterdam Neuroscience, Meibergdreef 9, Amsterdam, the Netherlands
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Li A, Qin Y, Gong G. The Changes of Mitochondria during Aging and Regeneration. Adv Biol (Weinh) 2024:e2300445. [PMID: 38979843 DOI: 10.1002/adbi.202300445] [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: 12/04/2023] [Revised: 05/30/2024] [Indexed: 07/10/2024]
Abstract
Aging and regeneration are opposite cellular processes. Aging refers to progressive dysfunction in most cells and tissues, and regeneration refers to the replacement of damaged or dysfunctional cells or tissues with existing adult or somatic stem cells. Various studies have shown that aging is accompanied by decreased regenerative abilities, indicating a link between them. The performance of any cellular process needs to be supported by the energy that is majorly produced by mitochondria. Thus, mitochondria may be a link between aging and regeneration. It should be interesting to discuss how mitochondria behave during aging and regeneration. The changes of mitochondria in aging and regeneration discussed in this review can provide a timely and necessary study of the causal roles of mitochondrial homeostasis in longevity and health.
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Affiliation(s)
- Anqi Li
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, 325035, China
- Institute for Regenerative Medicine, Shanghai East Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Yuan Qin
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, 325035, China
| | - Guohua Gong
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, 325035, China
- Institute for Regenerative Medicine, Shanghai East Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
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3
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Wu X, Li C, Ke C, Huang C, Pan B, Wan C. The activation of AMPK/PGC-1α/GLUT4 signaling pathway through early exercise improves mitochondrial function and mitigates ischemic brain damage. Neuroreport 2024; 35:648-656. [PMID: 38813901 DOI: 10.1097/wnr.0000000000002048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Mitochondria play a crucial role in maintaining cellular energy supply and serve as a source of energy for repairing nerve damage following a stroke. Given that exercise has the potential to enhance energy metabolism, investigating the impact of exercise on mitochondrial function provides a plausible mechanism for stroke treatment. In our study, we established the middle cerebral artery occlusion (MCAO) model in Sprague-Dawley rats and implemented early exercise intervention. Neurological severity scores, beam-walking test score, and weight were used to evaluate neurological function. The volume of cerebral infarction was measured by MRI. Nerve cell apoptosis was detected by TUNEL staining. Mitochondrial morphology and structure were detected by mitochondrial electron microscopy. Mitochondrial function was assessed using membrane potential and ATP measurements. Western blotting was used to detect the protein expression of AMPK/PGC-1α/GLUT4. Through the above experiments, we found that early exercise improved neurological function in rats after MCAO, reduced cerebral infarction volume and neuronal apoptosis, promoted the recovery of mitochondrial morphology and function. We further examined the protein expression of AMPK/PGC-1α/GLUT4 signaling pathway and confirmed that early exercise was able to increase its expression. Therefore, we suggest that early exercise initiated the AMPK/PGC-1α/GLUT4 signaling pathway, restoring mitochondrial function and augmenting energy supply. This, in turn, effectively improved both nerve and body function in rats following ischemic stroke.
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Affiliation(s)
- Xinyue Wu
- Department of Rehabilitation Medicine, Tianjin Medical University General Hospital
| | - Chen Li
- Department of Rehabilitation Medicine, Tianjin Medical University General Hospital
| | - Changkai Ke
- Department of Rehabilitation Medicine, Tianjin Medical University General Hospital
| | - Chuan Huang
- Department of Rehabilitation Medicine, Tianjin Medical University General Hospital
| | - Bingchen Pan
- Institute of Medical technology, Tianjin Medical University, Tianjin, China
| | - Chunxiao Wan
- Department of Rehabilitation Medicine, Tianjin Medical University General Hospital
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Deshmukh H, Santos JM, Bender M, Dufour JM, Lovett J, Shen CL. Peanut Shell Extract Improves Mitochondrial Function in db/db Mice via Suppression of Oxidative Stress and Inflammation. Nutrients 2024; 16:1977. [PMID: 38999726 PMCID: PMC11243022 DOI: 10.3390/nu16131977] [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: 05/10/2024] [Revised: 06/12/2024] [Accepted: 06/17/2024] [Indexed: 07/14/2024] Open
Abstract
Accumulating evidence shows a strong correlation between type 2 diabetes mellitus, mitochondrial dysfunction, and oxidative stress. We evaluated the effects of dietary peanut shell extract (PSE) supplementation on mitochondrial function and antioxidative stress/inflammation markers in diabetic mice. Fourteen db/db mice were randomly assigned to a diabetic group (DM in AIN-93G diet) and a PSE group (1% wt/wt PSE in AIN-93G diet) for 5 weeks. Six C57BL/6J mice were fed with an AIN-93G diet for 5 weeks (control group). Gene and protein expression in the liver, brain, and white adipose tissue (WAT) were determined using qRT-PCR and Immunoblot, respectively. Compared to the control group, the DM group had (i) increased gene and protein expression levels of DRP1 (fission), PINK1 (mitophagy), and TNFα (inflammation) and (ii) decreased gene and protein expression levels of MFN1, MFN2, OPA1 (fusion), TFAM, PGC-1α (biogenesis), NRF2 (antioxidative stress) and IBA1 (microglial activation) in the liver, brain, and WAT of db/db mice. Supplementation of PSE into the diet restored the DM-induced changes in the gene and protein expression of DRP1, PINK1, TNFα, MFN1, MFN2, OPA1, TFAM, PGC-1α, NRF2, and IBA1 in the liver, brain, and WAT of db/db mice. This study demonstrates that PSE supplementation improved mitochondrial function in the brain, liver, and WAT of db/db mice, in part due to suppression of oxidative stress and inflammation.
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Affiliation(s)
- Hemalata Deshmukh
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (H.D.); (J.M.S.); (J.L.)
| | - Julianna M. Santos
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (H.D.); (J.M.S.); (J.L.)
| | - Matthew Bender
- Department of Medical Education, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (M.B.); (J.M.D.)
| | - Jannette M. Dufour
- Department of Medical Education, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (M.B.); (J.M.D.)
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Obesity Research Institute, Texas Tech University, Lubbock, TX 79401, USA
| | - Jacob Lovett
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (H.D.); (J.M.S.); (J.L.)
| | - Chwan-Li Shen
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; (H.D.); (J.M.S.); (J.L.)
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Obesity Research Institute, Texas Tech University, Lubbock, TX 79401, USA
- Center of Excellence for Translational Neuroscience and Therapeutics, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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Chiș A, Noubissi PA, Pop OL, Mureșan CI, Fokam Tagne MA, Kamgang R, Fodor A, Sitar-Tăut AV, Cozma A, Orășan OH, Hegheș SC, Vulturar R, Suharoschi R. Bioactive Compounds in Moringa oleifera: Mechanisms of Action, Focus on Their Anti-Inflammatory Properties. PLANTS (BASEL, SWITZERLAND) 2023; 13:20. [PMID: 38202328 PMCID: PMC10780634 DOI: 10.3390/plants13010020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/06/2023] [Accepted: 12/15/2023] [Indexed: 01/12/2024]
Abstract
Moringa oleifera (M. oleifera) is a tropical tree native to Pakistan, India, Bangladesh, and Afghanistan; it is cultivated for its nutritious leaves, pods, and seeds. This scientific study was conducted to outline the anti-inflammatory properties and mechanisms of action of bioactive compounds from M. oleifera. The existing research has found that the plant is used in traditional medicine due to its bioactive compounds, including phytochemicals: flavonoids and polyphenols. The compounds are thought to exert their anti-inflammatory effects due to: (1) inhibition of pro-inflammatory enzymes: quercetin and kaempferol inhibit the pro-inflammatory enzymes (cyclooxygenase and lipoxygenase); (2) regulation of cytokine production: isothiocyanates modulate signaling pathways involved in inflammation, such as the nuclear factor-kappa B (NF-kappa B) pathway; isothiocyanates inhibit the production of pro-inflammatory cytokines such as TNF-α (tumor necrosis factor α) and IL-1β (interleukin-1β); and (3) antioxidant activity: M. oleifera contains flavonoids, polyphenols, known to reduce oxidative stress and inflammation. The review includes M. oleifera's effects on cardiovascular protection, anti-hypertensive activities, type 2 diabetes, inflammatory bowel disease, and non-alcoholic fatty liver disease (NAFLD). This research could prove valuable for exploring the pharmacological potential of M. oleifera and contributing to the prospects of developing effective medicines for the benefit of human health.
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Affiliation(s)
- Adina Chiș
- Department of Molecular Sciences, “Iuliu Hațieganu” University of Medicine and Pharmacy, 6 Louis Pasteur St, 400349 Cluj-Napoca, Romania; (A.C.); (R.V.)
| | - Paul Aimé Noubissi
- Department of Animal Biology and Conservation, Faculty of Science, University of Buea, Buea P.O. Box 63, Cameroon; (P.A.N.); (R.K.)
| | - Oana-Lelia Pop
- Department of Food Science, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Mănăștur, 400372 Cluj-Napoca, Romania; (O.-L.P.); (R.S.)
- Molecular Nutrition and Proteomics Lab, CDS3, Life Science Institute, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Mănăștur, 400372 Cluj-Napoca, Romania
| | - Carmen Ioana Mureșan
- Department of Food Science, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Mănăștur, 400372 Cluj-Napoca, Romania; (O.-L.P.); (R.S.)
- Molecular Nutrition and Proteomics Lab, CDS3, Life Science Institute, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Mănăștur, 400372 Cluj-Napoca, Romania
| | - Michel Archange Fokam Tagne
- Department of Biological Sciences, Faculty of Science, University of Ngaoundéré, Ngaoundéré P.O. Box 454, Cameroon;
| | - René Kamgang
- Department of Animal Biology and Conservation, Faculty of Science, University of Buea, Buea P.O. Box 63, Cameroon; (P.A.N.); (R.K.)
| | - Adriana Fodor
- Clinical Center of Diabetes, Nutrition and Metabolic Diseases, “Iuliu Hațieganu” University of Medicine and Pharmacy, 2-4 Clinicilor St., 400012 Cluj-Napoca, Romania;
| | - Adela-Viviana Sitar-Tăut
- Department of Internal Medicine, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (A.-V.S.-T.); (A.C.); (O.H.O.)
| | - Angela Cozma
- Department of Internal Medicine, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (A.-V.S.-T.); (A.C.); (O.H.O.)
| | - Olga Hilda Orășan
- Department of Internal Medicine, Faculty of Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (A.-V.S.-T.); (A.C.); (O.H.O.)
| | - Simona Codruța Hegheș
- Department of Drug Analysis, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, Louis Pasteur Street 6, 400349 Cluj-Napoca, Romania
| | - Romana Vulturar
- Department of Molecular Sciences, “Iuliu Hațieganu” University of Medicine and Pharmacy, 6 Louis Pasteur St, 400349 Cluj-Napoca, Romania; (A.C.); (R.V.)
| | - Ramona Suharoschi
- Department of Food Science, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Mănăștur, 400372 Cluj-Napoca, Romania; (O.-L.P.); (R.S.)
- Molecular Nutrition and Proteomics Lab, CDS3, Life Science Institute, University of Agricultural Science and Veterinary Medicine, 3-5 Calea Mănăștur, 400372 Cluj-Napoca, Romania
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Rivera CN, Kamer MM, Cook NE, McGovern MR, Watne RM, Wommack AJ, Vaughan RA. 5-Aza-2'-deoxycytidine-mediated DNA hypomethylation with and without concurrent insulin resistance suppresses myotube mitochondrial capacity. Cell Biochem Funct 2023; 41:1422-1429. [PMID: 37916846 DOI: 10.1002/cbf.3878] [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: 06/07/2023] [Revised: 10/09/2023] [Accepted: 10/13/2023] [Indexed: 11/03/2023]
Abstract
Type 2 diabetes is characterized by elevated blood glucose and reduced insulin sensitivity in target tissues. Moreover, reduced mitochondrial metabolism and expressional profile of genes governing mitochondrial metabolism (such as peroxisome proliferator-activated receptor gamma coactivator 1-alpha [PGC-1α]) are also reduced during insulin resistance. Epigenetic regulation via DNA methylation of genes including PGC-1α may contribute to diminished mitochondrial capacity, while hypomethylation of PGC-1α (such as that invoked by exercise) has been associated with increased PGC-1α expression and favorable metabolic outcomes. The purpose of the present report is to characterize the effects of DNA hypomethylation on myotube metabolism and expression of several related metabolic targets. C2C12 myotubes were treated with 5-Aza-2'-deoxycytidine (5-Aza) for either 24 or 72 h both with and without hyperinsulinemic-induced insulin resistance. Mitochondrial and glycolytic metabolism were measured via oxygen consumption and extracellular acidification rate, respectively. Metabolic gene and protein expression were assessed via quantitative real time polymerase chain reaction and western blot analysis, respectively. Though expression of PGC-1α and other related targets remained unaltered, insulin resistance and 5-Aza treatment significantly reduced mitochondrial metabolism. Similarly, peak glycolytic metabolism was diminished by 5-Aza-treated cells, while basal glycolytic metabolism was unaltered. 5-Aza also reduced the expression of branched-chain amino acid (BCAA) catabolic components, however BCAA utilization was enhanced during insulin resistance with 5-Aza treatment. Together the present work provides proof-of-concept evidence of the potential role of DNA methylation in the regulation of mitochondrial metabolism and the potential interactions with insulin resistance in a model of skeletal muscle.
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Affiliation(s)
- Caroline N Rivera
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Madison M Kamer
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Norah E Cook
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Macey R McGovern
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
| | - Rachel M Watne
- Department of Chemistry, High Point University, High Point, North Carolina, USA
| | - Andrew J Wommack
- Department of Chemistry, High Point University, High Point, North Carolina, USA
| | - Roger A Vaughan
- Department of Health and Human Performance, High Point University, High Point, North Carolina, USA
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Hafez HA, Atoom AM, Khafaga RHM, Shaker SA, Kamel MA, Assem NM, Mahmoud SA. Direct-Acting Antiviral Drug Modulates the Mitochondrial Biogenesis in Different Tissues of Young Female Rats. Int J Mol Sci 2023; 24:15844. [PMID: 37958828 PMCID: PMC10647297 DOI: 10.3390/ijms242115844] [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: 09/16/2023] [Revised: 10/28/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023] Open
Abstract
(1) Background: Hepatitis C virus (HCV) infection is endemic in Egypt, with the highest prevalence rate worldwide. Sofosbuvir (SOF) is a nucleos(t)ide analog that specifically inhibits HCV replication. This study aimed to explore the possible effects of the therapeutic dose of SOF on the mitochondrial biogenesis and functions of the liver, muscle, and ovarian tissues of young normal female rats. (2) Methods: This study was conducted on 20 female Wistar rats, classified into two groups, the control group and the exposed group; the latter was orally supplemented with 4 mg/kg/day of SOF for 3 months. (3) Results: The exposure to SOF impairs mitochondrial biogenesis via mitochondrial DNA copy number decline and suppressed mitochondrial biogenesis-regulated parameters at mRNA and protein levels. Also, SOF suppresses the DNA polymerase γ (POLG) expression, citrate synthase activity, and mitochondrial NADH dehydrogenase subunit-5 (ND5) content, which impairs mitochondrial functions. SOF increased lipid peroxidation and oxidative DNA damage markers and decreased tissue expression of nuclear factor erythroid 2-related factor 2 (Nfe2l2). (4) Conclusions: The present findings demonstrate the adverse effects of SOF on mitochondrial biogenesis and function in different tissues of young female rats, which mostly appeared in ovarian tissues.
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Affiliation(s)
- Hala A. Hafez
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Ali M. Atoom
- Department of Medical Laboratory Sciences, Faculty of Allied Medical Sciences, Al-Ahliyya Amman University, Amman 19111, Jordan;
| | - Rana H. M. Khafaga
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Sara A. Shaker
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Maher A. Kamel
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Nagwa M. Assem
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
| | - Shimaa A. Mahmoud
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt; (R.H.M.K.); (S.A.S.); (N.M.A.); (S.A.M.)
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Abounouh K, Tanouti IA, Ouladlahsen A, Tahiri M, Badre W, Dehbi H, Sarih M, Benjelloun S, Pineau P, Ezzikouri S. The peroxisome proliferator-activated receptor γ coactivator-1 alpha rs8192678 (Gly482Ser) variant and hepatitis B virus clearance. Infect Dis (Lond) 2023; 55:614-624. [PMID: 37376899 DOI: 10.1080/23744235.2023.2228403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 06/06/2023] [Accepted: 06/18/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND Chronic hepatitis B virus (CHB) infection is still incurable a major public health problem. It is yet unclear how host genetic factors influence the development of HBV infection. The peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PPARGC1A) has been shown to regulate hepatitis B virus (HBV). Several reports found that PPARGC1A variants are involved in a number of distinct liver diseases. Here we investigate whether the PPARGC1A rs8192678 (Gly482Ser) variant is involved in the spontaneous clearance of acute HBV infection and if it participates in chronic disease progression in Moroccan patients. METHODS Our study included 292 chronic hepatitis B (CHB) patients and 181 individuals who spontaneously cleared-HBV infection. We genotyped the rs8192678 SNP using a TaqMan allelic discrimination assay and then explored its association with spontaneous HBV clearance and CHB progression. RESULTS Our data showed that individuals carrying CT and TT genotypes were more likely to achieve spontaneous clearance (OR = 0.48, 95% CI (0.32-0.73), p = 0.00047; OR = 0.28, 95% CI (0.15-0.53), p = 0.00005, respectively). Subjects carrying the mutant allele T were more likely to achieve spontaneous clearance (OR = 0.51, 95% CI (0.38-0.67), P = 2.68E-06). However, when we investigated the impact of rs8192678 on the progression of liver diseases, we neither observe any influence (p > 0.05) nor found any significant association between ALT, AST, HBV viral loads, and the PPARGC1A rs8192678 genotypes in patients with CHB (p > 0.05). CONCLUSION Our result suggests that PPARGC1A rs8192678 may modulate acute HBV infection, and could therefore represent a potential predictive marker in the Moroccan population.
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Affiliation(s)
- Karima Abounouh
- Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, Casablanca, Morocco
- Laboratory of Cellular and Molecular Pathology, Medical School, University Hassan II
| | - Ikram-Allah Tanouti
- Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Ahd Ouladlahsen
- Faculté de médecine de Casablanca, CHU Ibn Rochd, Casablanca, Morocco
| | - Mohamed Tahiri
- Faculté de médecine de Casablanca, CHU Ibn Rochd, Casablanca, Morocco
| | - Wafaa Badre
- Faculté de médecine de Casablanca, CHU Ibn Rochd, Casablanca, Morocco
| | - Hind Dehbi
- Laboratory of Cellular and Molecular Pathology, Medical School, University Hassan II
| | - M'hammed Sarih
- Service de Parasitologie et des Maladies Vectorielles, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Soumaya Benjelloun
- Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Pascal Pineau
- Unité "Organisation Nucléaire et Oncogenèse", INSERM U993, Institut Pasteur, Paris, France
| | - Sayeh Ezzikouri
- Virology Unit, Viral Hepatitis Laboratory, Institut Pasteur du Maroc, Casablanca, Morocco
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Rivera CN, Hinkle JS, Watne RM, Macgowan TC, Wommack AJ, Vaughan RA. PPAR β/ δ Agonism with GW501516 Increases Myotube PGC-1 α Content and Reduces BCAA Media Content Independent of Changes in BCAA Catabolic Enzyme Expression. PPAR Res 2023; 2023:4779199. [PMID: 37325367 PMCID: PMC10264138 DOI: 10.1155/2023/4779199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 05/01/2023] [Accepted: 05/17/2023] [Indexed: 06/17/2023] Open
Abstract
Background Type 2 diabetes is characterized by reduced insulin sensitivity, elevated blood metabolites, and reduced mitochondrial metabolism with reduced expression of genes governing metabolism such as peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α). PGC-1α regulates the expression of branched-chain amino acid (BCAA) metabolism, and thus, increased circulating BCAA in diabetics may be partially explained by reduced PGC-1α expression. PGC-1α functions in-part through interactions with peroxisome proliferator-activated receptor β/δ (PPARβ/δ). The present report examined the effects of the PPARβ/δ agonism on cell metabolism and related gene/protein expression of cultured myotubes, with a primary emphasis on determining the effects of GW on BCAA disposal and catabolic enzyme expression. Methods C2C12 myotubes were treated with GW501516 (GW) for up to 24 hours. Mitochondrial and glycolytic metabolism were measured via oxygen consumption and extracellular acidification rate, respectively. Metabolic gene and protein expression were assessed via quantitative real-time polymerase chain reaction (qRT-PCR) and western blot, respectively. Media BCAA content was assessed via liquid chromatography-mass spectrometry (LC/MS). Results GW significantly increased PGC-1α protein expression, mitochondrial content, and mitochondrial function. GW also significantly reduced BCAA content within culture media following 24-hour treatment; however, expression of BCAA catabolic enzymes/transporter was unchanged. Conclusion These data confirm the ability of GW to increase muscle PGC-1α content and decrease BCAA media content without affecting BCAA catabolic enzymes/transporter. These findings suggest heightened BCAA uptake (and possibly metabolism) may occur without substantial changes in the protein levels of related cell machinery.
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Affiliation(s)
- Caroline N. Rivera
- Department of Exercise Science, High Point University, High Point, NC, USA
| | - Jason S. Hinkle
- Department of Exercise Science, High Point University, High Point, NC, USA
| | - Rachel M. Watne
- Department of Chemistry, High Point University, High Point, NC, USA
| | | | | | - Roger A. Vaughan
- Department of Exercise Science, High Point University, High Point, NC, USA
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10
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Wu LT, Tan LM, You CY, Lan TY, Li WX, Xu YT, Ren ZX, Ding Q, Zhou CY, Tang ZR, Sun WZ, Sun ZH. Effects of dietary niacinamide and CP concentrations on the nitrogen excretion, growth performance, and meat quality of pigs. Animal 2023; 17:100869. [PMID: 37390624 DOI: 10.1016/j.animal.2023.100869] [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: 03/16/2022] [Revised: 05/18/2023] [Accepted: 05/26/2023] [Indexed: 07/02/2023] Open
Abstract
Reducing the dietary CP concentration in the formulation of low-protein diets without adverse effects on animal growth performance and meat quality remains challenging. In this study, we investigated the effects of nicotinamide (NAM) on the nitrogen excretion, growth performance, and meat quality of growing-finishing pigs fed low-protein diets. To measure the nitrogen balance, we conducted two trials: in nitrogen balance trial 1, four crossbred (Duroc × Landrace × Large White) barrows (40 ± 0.5 kg BW) were used in a 4 × 4 Latin square design with four diets and periods. The diets consisted of a basal diet + 30 mg/kg NAM (a control dose), basal diet + 90 mg/kg NAM, basal diet + 210 mg/kg NAM, and basal diet + 360 mg/kg NAM. In nitrogen balance trial 2, another four barrows (40 ± 0.5 kg BW) were used in a 4 × 4 Latin square design. The diets consisted of a basal diet + including 30 mg/kg NAM (control), basal diet + 360 mg/kg NAM, low-protein diet + 30 mg/kg NAM, and low-protein diet + 360 mg/kg NAM. To measure growth performance, two trials were conducted. In growth performance trial 1, 40 barrows (37.0 ± 1.0 kg) were randomly allocated to one of four dietary treatments (n = 10 per group), whereas in growth performance trial 2, 300 barrows (41.4 ± 2.0 kg) were randomly allocated to one of four dietary treatments, with each dietary treatment conducted in five repetitions with 15 pigs each. The four diets in the two growth performance trials were similar to those in nitrogen balance trial 2. Supplementing the diet with 210 or 360 mg/kg NAM reduced urinary nitrogen excretion and total nitrogen excretion and increased nitrogen retention comparted with the control diet (P < 0.05). Compared with the control diet, the low-protein diet with 360 mg/kg NAM reduced faecal, urinary, and total nitrogen excretion (P < 0.05) without affecting nitrogen retention and average daily gain (P > 0.05). Pigs fed the low-protein diet with 360 mg/kg NAM showed a decreased intramuscular fat content in the longissimus thoracis muscle when compared with pigs fed the control diet (P > 0.05). Our results suggest NAM as a suitable dietary additive to reduce dietary CP concentration, maximise nitrogen retention and growth performance, and decrease fat deposition in pigs.
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Affiliation(s)
- L T Wu
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - L M Tan
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - C Y You
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - T Y Lan
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - W X Li
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - Y T Xu
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - Z X Ren
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - Q Ding
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - C Y Zhou
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - Z R Tang
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - W Z Sun
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China
| | - Z H Sun
- Laboratory for Bio-feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, PR China.
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11
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Arjunan A, Song J. Pharmacological and physiological roles of adipokines and myokines in metabolic-related dementia. Biomed Pharmacother 2023; 163:114847. [PMID: 37150030 DOI: 10.1016/j.biopha.2023.114847] [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: 03/21/2023] [Revised: 04/27/2023] [Accepted: 05/04/2023] [Indexed: 05/09/2023] Open
Abstract
Dementia is a detrimental neuropathologic condition with considerable physical, mental, social, and financial impact on patients and society. Patients with metabolic syndrome (MetS), a group of diseases that occur in tandem and increase the risk of neurologic diseases, have a higher risk of dementia. The ratio between muscle and adipose tissue is crucial in MetS, as these contain many hormones, including myokines and adipokines, which are involved in crosstalk and local paracrine/autocrine interactions. Evidence suggests that abnormal adipokine and myokine synthesis and release may be implicated in various MetS, such as atherosclerosis, diabetic mellitus (DM), and dyslipidemia, but their precise role is unclear. Here we review the literature on adipokine and myokine involvement in MetS-induced dementia via glucose and insulin homeostasis regulation, neuroinflammation, vascular dysfunction, emotional changes, and cognitive function.
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Affiliation(s)
- Archana Arjunan
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea
| | - Juhyun Song
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
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12
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Cho C, Ji M, Cho E, Yi S, Kim JG, Lee S. Chronic voluntary wheel running exercise ameliorates metabolic dysfunction via PGC-1α expression independently of FNDC5/irisin pathway in high fat diet-induced obese mice. J Physiol Sci 2023; 73:6. [PMID: 37041517 DOI: 10.1186/s12576-023-00864-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 03/28/2023] [Indexed: 04/13/2023]
Abstract
Exercise is an effective intervention to ameliorate metabolic diseases including obesity and insulin resistance, but the mechanisms involved in the metabolic amelioration have not yet been fully elucidated. This study aimed to determine whether AMPK-SIRT1-PGC-1α-FNDC5/Irisin-UCP1 expression is activated and whether metabolic dysfunction is ameliorated by chronic voluntary wheel running (VWR) in high-fat diet (HFD) induced obese mice. C57BL6J mice were randomly assigned into three groups at the age of 7 weeks for 10 weeks: normal chow diet (CON) group, HFD group, and HFD + VWR group. Chronic VWR ameliorates metabolic parameters and leads to increases in the expression of PGC-1α in the gastrocnemius muscle in HFD-induced obese mice. In contrast, the expression of AMPKα, SIRT1, and FNDC5, or circulating irisin levels did not lead to alteration. Improvement of metabolic health was partly mediated via PGC-1α expression by chronic VWR, but not FNDC5/Irisin pathway in HFD-induced obese mice.
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Affiliation(s)
- Chaeeun Cho
- Department of Human Movement Science, Graduate School, Incheon National University, Incheon, Republic of Korea
| | - Minje Ji
- Department of Human Movement Science, Graduate School, Incheon National University, Incheon, Republic of Korea
| | - Eunhee Cho
- Department of Human Movement Science, Graduate School, Incheon National University, Incheon, Republic of Korea
| | - Seon Yi
- Department of Life Science, College of Life Sciences and Bioengineering, Incheon National University, Incheon, Republic of Korea
| | - Jae Geun Kim
- Department of Life Science, College of Life Sciences and Bioengineering, Incheon National University, Incheon, Republic of Korea
| | - Sewon Lee
- Division of Sport Science, College of Arts & Physical Education, Incheon National University, Bldg# 16, Room# 423, (Songdo-Dong) 119 Academy-Ro, Yeonsu-Gu, Incheon, South Korea.
- Sport Science Institute, College of Arts & Physical Education, Incheon National University, Incheon, Republic of Korea.
- Health Promotion Center, College of Arts & Physical Education, Incheon National University, Incheon, Republic of Korea.
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13
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Yang M, Pan M, Huang D, Liu J, Guo Y, Liu Y, Zhang W. Glucagon Promotes Gluconeogenesis through the GCGR/PKA/CREB/PGC-1α Pathway in Hepatocytes of the Japanese Flounder Paralichthys olivaceus. Cells 2023; 12:cells12071098. [PMID: 37048171 PMCID: PMC10093564 DOI: 10.3390/cells12071098] [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: 02/02/2023] [Revised: 03/25/2023] [Accepted: 03/29/2023] [Indexed: 04/14/2023] Open
Abstract
In order to investigate the mechanism of glucagon regulation of gluconeogenesis, primary hepatocytes of the Japanese flounder (Paralichthys olivaceus) were incubated with synthesized glucagon, and methods based on inhibitors and gene overexpression were employed. The results indicated that glucagon promoted glucose production and increased the mRNA levels of glucagon receptor (gcgr), guanine nucleotide-binding protein Gs α subunit (gnas), adenylate cyclase 2 (adcy2), protein kinase A (pka), cAMP response element-binding protein 1 (creb1), peroxisome proliferator-activated receptor-γ coactivator 1α (pgc-1α), phosphoenolpyruvate carboxykinase 1 (pck1), and glucose-6-phosphatase (g6pc) in the hepatocytes. An inhibitor of GCGR decreased the mRNA expression of gcgr, gnas, adcy2, pka, creb1, pgc-1α, pck1, g6pc, the protein expression of phosphorylated CREB and PGC-1α, and glucose production. The overexpression of gcgr caused the opposite results. An inhibitor of PKA decreased the mRNA expression of pgc-1α, pck1, g6pc, the protein expression of phosphorylated-CREB, and glucose production in hepatocytes. A CREB-targeted inhibitor significantly decreased the stimulation by glucagon of the mRNA expression of creb1, pgc-1α, and gluconeogenic genes, and glucose production decreased accordingly. After incubating the hepatocytes with an inhibitor of PGC-1α, the glucagon-activated mRNA expression of pck1 and g6pc was significantly down-regulated. Together, these results demonstrate that glucagon promotes gluconeogenesis through the GCGR/PKA/CREB/PGC-1α pathway in the Japanese flounder.
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Affiliation(s)
- Mengxi Yang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), The Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China
- Hunan Engineering Technology Research Center of Featured Aquatic Resources Utilization, Fisheries College, Hunan Agricultural University, Changsha 410128, China
| | - Mingzhu Pan
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), The Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China
| | - Dong Huang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), The Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China
| | - Jiahuan Liu
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), The Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China
| | - Yanlin Guo
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), The Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China
| | - Yue Liu
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), The Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China
| | - Wenbing Zhang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), The Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
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14
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Mollet IG, Macedo MP. Pre-Diabetes-Linked miRNA miR-193b-3p Targets PPARGC1A, Disrupts Metabolic Gene Expression Profile and Increases Lipid Accumulation in Hepatocytes: Relevance for MAFLD. Int J Mol Sci 2023; 24:ijms24043875. [PMID: 36835287 PMCID: PMC9965679 DOI: 10.3390/ijms24043875] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/06/2023] [Accepted: 02/11/2023] [Indexed: 02/17/2023] Open
Abstract
Distinct plasma microRNA profiles associate with different disease features and could be used to personalize diagnostics. Elevated plasma microRNA hsa-miR-193b-3p has been reported in patients with pre-diabetes where early asymptomatic liver dysmetabolism plays a crucial role. In this study, we propose the hypothesis that elevated plasma hsa-miR-193b-3p conditions hepatocyte metabolic functions contributing to fatty liver disease. We show that hsa-miR-193b-3p specifically targets the mRNA of its predicted target PPARGC1A/PGC1α and consistently reduces its expression in both normal and hyperglycemic conditions. PPARGC1A/PGC1α is a central co-activator of transcriptional cascades that regulate several interconnected pathways, including mitochondrial function together with glucose and lipid metabolism. Profiling gene expression of a metabolic panel in response to overexpression of microRNA hsa-miR-193b-3p revealed significant changes in the cellular metabolic gene expression profile, including lower expression of MTTP, MLXIPL/ChREBP, CD36, YWHAZ and GPT, and higher expression of LDLR, ACOX1, TRIB1 and PC. Overexpression of hsa-miR-193b-3p under hyperglycemia also resulted in excess accumulation of intracellular lipid droplets in HepG2 cells. This study supports further research into potential use of microRNA hsa-miR-193b-3p as a possible clinically relevant plasma biomarker for metabolic-associated fatty liver disease (MAFLD) in dysglycemic context.
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Affiliation(s)
- Inês Guerra Mollet
- iNOVA4Health, NOVA Medical School (NMS), Faculdade de Ciências Médicas (FCM), Universidade NOVA de Lisboa, 1150-082 Lisboa, Portugal
- UCIBIO-Requimte, Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa, 2825-149 Caparica, Portugal
- Correspondence: (I.G.M.); (M.P.M.)
| | - Maria Paula Macedo
- iNOVA4Health, NOVA Medical School (NMS), Faculdade de Ciências Médicas (FCM), Universidade NOVA de Lisboa, 1150-082 Lisboa, Portugal
- Associação Protectora dos Diabéticos de Portugal, Education Research Center (APDP-ERC), 1250-203 Lisbon, Portugal
- Correspondence: (I.G.M.); (M.P.M.)
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15
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Emerging Role of SMILE in Liver Metabolism. Int J Mol Sci 2023; 24:ijms24032907. [PMID: 36769229 PMCID: PMC9917820 DOI: 10.3390/ijms24032907] [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: 11/29/2022] [Revised: 01/29/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
Small heterodimer partner-interacting leucine zipper (SMILE) is a member of the CREB/ATF family of basic leucine zipper (bZIP) transcription factors. SMILE has two isoforms, a small and long isoform, resulting from alternative usage of the initiation codon. Interestingly, although SMILE can homodimerize similar to other bZIP proteins, it cannot bind to DNA. As a result, SMILE acts as a co-repressor in nuclear receptor signaling and other transcription factors through its DNA binding inhibition, coactivator competition, and direct repression, thereby regulating the expression of target genes. Therefore, the knockdown of SMILE increases the transactivation of transcription factors. Recent findings suggest that SMILE is an important regulator of metabolic signals and pathways by causing changes in glucose, lipid, and iron metabolism in the liver. The regulation of SMILE plays an important role in pathological conditions such as hepatitis, diabetes, fatty liver disease, and controlling the energy metabolism in the liver. This review focuses on the role of SMILE and its repressive actions on the transcriptional activity of nuclear receptors and bZIP transcription factors and its effects on liver metabolism. Understanding the importance of SMILE in liver metabolism and signaling pathways paves the way to utilize SMILE as a target in treating liver diseases.
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16
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Sadasivam N, Radhakrishnan K, Choi HS, Kim DK. Emerging Role of SMILE in Liver Metabolism. Int J Mol Sci 2023; 24:2907. [DOI: https:/doi.org/10.3390/ijms24032907 academic] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/18/2023] Open
Abstract
Small heterodimer partner-interacting leucine zipper (SMILE) is a member of the CREB/ATF family of basic leucine zipper (bZIP) transcription factors. SMILE has two isoforms, a small and long isoform, resulting from alternative usage of the initiation codon. Interestingly, although SMILE can homodimerize similar to other bZIP proteins, it cannot bind to DNA. As a result, SMILE acts as a co-repressor in nuclear receptor signaling and other transcription factors through its DNA binding inhibition, coactivator competition, and direct repression, thereby regulating the expression of target genes. Therefore, the knockdown of SMILE increases the transactivation of transcription factors. Recent findings suggest that SMILE is an important regulator of metabolic signals and pathways by causing changes in glucose, lipid, and iron metabolism in the liver. The regulation of SMILE plays an important role in pathological conditions such as hepatitis, diabetes, fatty liver disease, and controlling the energy metabolism in the liver. This review focuses on the role of SMILE and its repressive actions on the transcriptional activity of nuclear receptors and bZIP transcription factors and its effects on liver metabolism. Understanding the importance of SMILE in liver metabolism and signaling pathways paves the way to utilize SMILE as a target in treating liver diseases.
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Affiliation(s)
- Nanthini Sadasivam
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Kamalakannan Radhakrishnan
- Clinical Vaccine R&D Centre, Department of Microbiology, Combinatorial Tumour Immunotheraphy MRC, Medical School, Chonnam National University, Gwangju 58128, Republic of Korea
| | - Hueng-Sik Choi
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Don-Kyu Kim
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
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17
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Rivera CN, Watne RM, Brown ZA, Mitchell SA, Wommack AJ, Vaughan RA. Effect of AMPK activation and glucose availability on myotube LAT1 expression and BCAA utilization. Amino Acids 2023; 55:275-286. [PMID: 36547760 DOI: 10.1007/s00726-022-03224-7] [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: 07/14/2022] [Accepted: 12/01/2022] [Indexed: 12/24/2022]
Abstract
Those with insulin resistance often display increased circulating branched-chain amino acids (BCAA), which has been largely attributable to reduced BCAA catabolic capacity. Metabolic stimuli such as exercise activates AMP-activated kinase (AMPK), which promotes the metabolism of BCAA and induction/activation of BCAA catabolic enzymes. Though much attention has been paid to BCAA catabolic machinery, few studies have assessed the effect of AMPK activation on the predominant BCAA transporter, L-type amino acid transporter 1 (LAT1). This study assessed the effect of AMPK activation on LAT1 expression via common chemical AMPK activators in a cell model of skeletal muscle. C2C12 myotubes were treated with either 1 mM AICAR, 1 mM Metformin, or filter-sterilized water (control) for 24 h with either low- (5 mM) or high-glucose (25 mM) media. LAT1 and pAMPK protein content were measured via western blot. BCAA media content was measured using liquid chromatography-mass spectrometry. AICAR treatment significantly increased pAMPK and reduced LAT1 expression. Collectively, pAMPK and LAT1 displayed a significant inverse relationship independent of glucose levels. During low-glucose experiments, AICAR-treated cells had higher BCAA media content compared to other groups, and an inverse relationship between LAT1 and BCAA media content was observed, however, these effects were not consistently observed during high-glucose conditions. Further investigation with AICAR with and without concurrent LAT1 inhibition (via JPH203) also revealed reduced BCAA utilization in AICAR-treated cells regardless of LAT1 inhibition (which also independently reduced BCAA utilization). pAMPK activation via AICAR (but not Metformin) may reduce LAT1 expression and BCAA uptake in a glucose-dependent manner.
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Affiliation(s)
- Caroline N Rivera
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Rachel M Watne
- Department of Chemistry, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Zoe A Brown
- Department of Chemistry, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Samantha A Mitchell
- Department of Chemistry, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Andrew J Wommack
- Department of Chemistry, High Point University, One University Parkway, High Point, NC, 27268, USA
| | - Roger A Vaughan
- Department of Exercise Science, High Point University, One University Parkway, High Point, NC, 27268, USA.
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18
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Rivera CN, Kamer MM, Rivera ME, Watne RM, Macgowan TC, Wommack AJ, Vaughan RA. Insulin resistance promotes extracellular BCAA accumulation without altering LAT1 content, independent of prior BCAA treatment in a myotube model of skeletal muscle. Mol Cell Endocrinol 2023; 559:111800. [PMID: 36270542 DOI: 10.1016/j.mce.2022.111800] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 11/17/2022]
Abstract
PURPOSE Type 2 diabetes is characterized by reduced insulin sensitivity which correlates with increased circulating BCAA. These experiments investigated the effects of insulin resistance with and without excess BCAA on myotube insulin sensitivity and L-type amino acid transporter-1 (LAT1). METHODS C2C12 myotubes were treated with or without excess BCAA for 1 or 6 days, both with and without insulin resistance. Western blot was used to assess insulin sensitivity and LAT1 content. Liquid chromatography-mass spectrometry was used to evaluate BCAA media content. RESULTS Insulin resistance was associated with significantly increased extracellular BCAA accumulation independent of LAT1 content. Conversely, prior BCAA treatment was not associated with extracellular BCAA accumulation regardless of level of insulin sensitivity. CONCLUSION These data suggest insulin resistance, but not BCAA treatment, promotes extracellular BCAA accumulation independent of changes in LAT1 content, implicating insulin resistance as a causal agent of extracellular BCAA accumulation.
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Affiliation(s)
- Caroline N Rivera
- Department of Exercise Science, High Point University, High Point, NC, USA.
| | - Madison M Kamer
- Department of Exercise Science, High Point University, High Point, NC, USA.
| | - Madison E Rivera
- Department of Exercise Science, High Point University, High Point, NC, USA.
| | - Rachel M Watne
- Department of Chemistry, High Point University, High Point, NC, USA.
| | - Trent C Macgowan
- Department of Chemistry, High Point University, High Point, NC, USA.
| | - Andrew J Wommack
- Department of Chemistry, High Point University, High Point, NC, USA.
| | - Roger A Vaughan
- Department of Exercise Science, High Point University, High Point, NC, USA.
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19
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Binjawhar DN, Alhazmi AT, Bin Jawhar WN, MohammedSaeed W, Safi SZ. Hyperglycemia-induced oxidative stress and epigenetic regulation of ET-1 gene in endothelial cells. Front Genet 2023; 14:1167773. [PMID: 37139232 PMCID: PMC10150048 DOI: 10.3389/fgene.2023.1167773] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 03/31/2023] [Indexed: 05/05/2023] Open
Abstract
Introduction: Hyperglycemia-induced endothelial dysfunction and the subsequent increase of oxidative stress could lead to aberrant regulation of various genes which are responsible for a range of functions. This study aims to find out how hyperglycemia affect oxidative stress and then the expression and methylation of endothelin 1 (ET-1) gene in in human umbilical vein endothelial cells (HUVEC). Methods: Cells were cultured in growth medium and exposed to low and high glucose concentrations to mimic normal and diabetic condition respectively. Computational analysis were performed using UCSC genome browser and eukaryotic promoter database (EPD). The expression of ET-1 gene was investigated by real time PCR. Cytotoxicity and oxidative stress were determined by MTT and DCFH-DA assays respectively. Promoter methylation was assessed by the bisulfite sequencing method. Results: DCFH-DA assay showed that hyperglycemia can significantly increase the regulation of reactive oxygen species synthesis. The relative expression of ET-1 gene was increased due to exposure to high glucose concentration. MTT assay revealed reduced viability of cells due to the glucose induced damage. Methylation analysis revealed hypomethylation of the promoter of ET-1 however the difference was not significant. Out of 175 CpGs at 25 CpG sites, only 36 CpGs were methylated (20.5% methylation) in cell treated with normal glucose. Upon exposure to high glucose only 30 CpGs were methylated in 175 CpGs at 25 CpG sites (17.1% methylation). Discussion: Our study concludes a significantly high expression of ET-1 gene in response to high glucose exposure in HUVECs. It also reports that hyperglycemic condition leads to elevated oxidative stress. No significant change was found in methylation when cells were treated with high and low glucose concentrations.
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Affiliation(s)
- Dalal Nasser Binjawhar
- Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Alaa T. Alhazmi
- Hera General Hospital, Makkah, Saudi Arabia
- *Correspondence: Alaa T. Alhazmi, ; Wejdan Nasser Bin Jawhar, ; Walaa MohammedSaeed, ; Sher Zaman Safi,
| | - Wejdan Nasser Bin Jawhar
- Faculty—Clinical Laboratory Sciences Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
- *Correspondence: Alaa T. Alhazmi, ; Wejdan Nasser Bin Jawhar, ; Walaa MohammedSaeed, ; Sher Zaman Safi,
| | - Walaa MohammedSaeed
- Department of Medical Laboratory Technology, Faculty of Applied Medical Science at Taibah University, Al Madinah Al Munawarah, Saudi Arabia
- *Correspondence: Alaa T. Alhazmi, ; Wejdan Nasser Bin Jawhar, ; Walaa MohammedSaeed, ; Sher Zaman Safi,
| | - Sher Zaman Safi
- Faculty of Medicine, Bioscience and Nursing, MAHSA University, Selangor, Malaysia
- *Correspondence: Alaa T. Alhazmi, ; Wejdan Nasser Bin Jawhar, ; Walaa MohammedSaeed, ; Sher Zaman Safi,
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20
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Wang R, Santos JM, Dufour JM, Stephens ER, Miranda JM, Washburn RL, Hibler T, Kaur G, Lin D, Shen CL. Ginger Root Extract Improves GI Health in Diabetic Rats by Improving Intestinal Integrity and Mitochondrial Function. Nutrients 2022; 14:4384. [PMID: 36297069 PMCID: PMC9611027 DOI: 10.3390/nu14204384] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/30/2022] [Accepted: 10/11/2022] [Indexed: 12/06/2022] Open
Abstract
Background Emerging research suggests hyperglycemia can increase intestinal permeability. Ginger and its bioactive compounds have been reported to benefit diabetic animals due to their anti-inflammatory and antioxidant properties. In this study, we revealed the beneficial effect of gingerol-enriched ginger (GEG) on intestinal health (i.e., barrier function, mitochondrial function, and anti-inflammation) in diabetic rats. Methods Thirty-three male Sprague Dawley rats were assigned to three groups: low-fat diet (control group), high-fat-diet (HFD) + streptozotocin (single low dose 35 mg/kg body weight (BW) after 2 weeks of HFD feeding) (DM group), and HFD + streptozotocin + 0.75% GEG in diet (GEG group) for 42 days. Glucose tolerance tests (GTT) and insulin tolerance tests (ITT) were conducted at baseline and prior to sample collection. Total pancreatic insulin content was determined by ELISA. Total RNA of intestinal tissues was extracted for mRNA expression using qRT-PCR. Results Compared to the DM group, the GEG group had improved glucose tolerance and increased pancreatic insulin content. Compared to those without GEG (DM group), GEG supplementation (GEG group) increased the gene expression of tight junction (Claudin-3) and antioxidant capacity (SOD1), while it decreased the gene expression for mitochondrial fusion (MFN1), fission (FIS1), biogenesis (PGC-1α, TFAM), mitophagy (LC3B, P62, PINK1), and inflammation (NF-κB). Conclusions Ginger root extract improved glucose homeostasis in diabetic rats, in part, via improving intestinal integrity and mitochondrial dysfunction of GI health.
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Affiliation(s)
- Rui Wang
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Julianna Maria Santos
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Jannette M. Dufour
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Department of Medical Education, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Obesity Research Institute, Texas Tech University, Lubbock, TX 79401, USA
| | - Emily R. Stephens
- Department of Medical Education, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Jonathan M. Miranda
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Rachel L. Washburn
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Taylor Hibler
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Gurvinder Kaur
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Department of Medical Education, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Obesity Research Institute, Texas Tech University, Lubbock, TX 79401, USA
| | - Dingbo Lin
- Department of Nutritional Sciences, Oklahoma State University, Stillwater, OK 74078, USA
| | - Chwan-Li Shen
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Obesity Research Institute, Texas Tech University, Lubbock, TX 79401, USA
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21
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Kang CW, Park M, Lee HJ. Mulberry (Morus alba L.) Leaf Extract and 1-Deoxynojirimycin Improve Skeletal Muscle Insulin Resistance via the Activation of IRS-1/PI3K/Akt Pathway in db/db Mice. Life (Basel) 2022; 12:life12101630. [PMID: 36295064 PMCID: PMC9604886 DOI: 10.3390/life12101630] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/15/2022] [Accepted: 10/16/2022] [Indexed: 11/26/2022] Open
Abstract
Mulberry (Morus alba L.) leaves have been used to lower blood glucose in patients with diabetes. We evaluated the effects of mulberry leaves extract (MLE) and 1-deoxynojirimycin (1-DNJ) in improving insulin resistance through the activation of the IRS-1/PI3K/Akt pathway in the skeletal muscle of db/db mice. Histological analysis revealed an amelioration of muscle deformation and increased muscle fiber size. MLE and 1-DNJ positively raised the protein expression of related glucose uptake and increased the translocation of glucose transporter type 4 (GLUT4) to the membrane. Furthermore, MLE and 1-DNJ activated the IRS-1/PI3K/Akt pathway in the skeletal muscle and, subsequently, modulated the protein levels of glycogen synthase kinase-3beta (GSK-3β) and glycogen synthase (GS), leading to elevated muscle glycogen content. These findings suggest that MLE and 1-DNJ supplementation improves insulin resistance by modulating the insulin signaling pathway in the skeletal muscle of db/db mice.
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Affiliation(s)
- Chae-Won Kang
- Institute for Aging and Clinical Nutrition Research, Gachon University, Seongnam 13120, Gyeonggi-do, Korea
| | - Miey Park
- Institute for Aging and Clinical Nutrition Research, Gachon University, Seongnam 13120, Gyeonggi-do, Korea
- Department of Food and Nutrition, College of BioNano Technology, Gachon University, Seongnam 13120, Gyeonggi-do, Korea
- Correspondence: (M.P.); (H.-J.L.); Tel.: +82-31-750-4409 (M.P.); +82-31-750-5968 (H.-J.L.); Fax: +82-31-724-4411 (H.-J.L.)
| | - Hae-Jeung Lee
- Institute for Aging and Clinical Nutrition Research, Gachon University, Seongnam 13120, Gyeonggi-do, Korea
- Department of Food and Nutrition, College of BioNano Technology, Gachon University, Seongnam 13120, Gyeonggi-do, Korea
- Correspondence: (M.P.); (H.-J.L.); Tel.: +82-31-750-4409 (M.P.); +82-31-750-5968 (H.-J.L.); Fax: +82-31-724-4411 (H.-J.L.)
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22
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Montes-de-Oca-García A, Corral-Pérez J, Velázquez-Díaz D, Perez-Bey A, Rebollo-Ramos M, Marín-Galindo A, Gómez-Gallego F, Calderon-Dominguez M, Casals C, Ponce-González JG. Influence of Peroxisome Proliferator-Activated Receptor (PPAR)-gamma Coactivator (PGC)-1 alpha gene rs8192678 polymorphism by gender on different health-related parameters in healthy young adults. Front Physiol 2022; 13:885185. [PMID: 35936915 PMCID: PMC9354774 DOI: 10.3389/fphys.2022.885185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
This study aimed to analyze the influence of the peroxisome proliferator-activated receptor (PPAR)-gamma coactivator (PGC)-1 alpha (PPARGC1A) gene rs8192678 C>T polymorphism on different health-related parameters in male and female young adults. The PPARGC1A gene rs8192678 polymorphism was ascertained by polymerase chain reaction in 74 healthy adults (28 women; 22.72 ± 4.40 years) from Andalusia (Spain). Health-related variables included cardiometabolic risk, anthropometry and body composition, biochemical parameters, insulin sensitivity (QUICKI and HOMA-IR indexes), blood pressure (BP) at rest and after exercise, diet, basal metabolism, physical activity, maximal fat oxidation, and cardiorespiratory fitness. Our results showed differences by PPARGC1A gene rs8192678 C>T polymorphism in body mass (p = 0.002), body mass index (p = 0.024), lean body mass (p = 0.024), body fat (p = 0.032), waist circumference (p = 0.020), and BP recovery ratio (p < 0.001). The recessive model (CC vs. CT/TT) showed similar results but also with differences in basal metabolism (p = 0.045) and total energy expenditure (p = 0.024). A genotype*sex interaction was found in the QUICKI index (p = 0.016), with differences between CC and CT/TT in men (p = 0.049) and between men and women inside the CT/TT group (p = 0.049). Thus, the PPARGC1A gene rs8192678 C>T polymorphism is associated with body composition, basal metabolism, total energy expenditure, and BP recovery, where the CC genotype confers a protective effect. Moreover, our study highlighted sexual dimorphism in the influence of PPARGC1A gene rs8192678 C>T polymorphism on the QUICKI index.
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Affiliation(s)
- Adrián Montes-de-Oca-García
- MOVE-IT Research Group, Department of Physical Education, Faculty of Education Sciences, University of Cadiz, Cádiz, Spain
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
| | - Juan Corral-Pérez
- MOVE-IT Research Group, Department of Physical Education, Faculty of Education Sciences, University of Cadiz, Cádiz, Spain
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
| | - Daniel Velázquez-Díaz
- MOVE-IT Research Group, Department of Physical Education, Faculty of Education Sciences, University of Cadiz, Cádiz, Spain
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
- Department of Psychology, Brain Aging and Cognitive Health Laboratory, University of Pittsburgh, Pittsburgh, PA, United States
| | - Alejandro Perez-Bey
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
- Department of Physical Education, GALENO Research Group, Faculty of Education Sciences, University of Cadiz, Cádiz, Spain
| | - María Rebollo-Ramos
- MOVE-IT Research Group, Department of Physical Education, Faculty of Education Sciences, University of Cadiz, Cádiz, Spain
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
| | - Alberto Marín-Galindo
- MOVE-IT Research Group, Department of Physical Education, Faculty of Education Sciences, University of Cadiz, Cádiz, Spain
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
| | - Félix Gómez-Gallego
- Faculty of Health Sciences, International University of La Rioja, Logroño, Spain
| | - Maria Calderon-Dominguez
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
- Biomedicine, Biotechnology and Public Health Department, University of Cadiz, Cádiz, Spain
| | - Cristina Casals
- MOVE-IT Research Group, Department of Physical Education, Faculty of Education Sciences, University of Cadiz, Cádiz, Spain
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
- *Correspondence: Cristina Casals,
| | - Jesús G. Ponce-González
- MOVE-IT Research Group, Department of Physical Education, Faculty of Education Sciences, University of Cadiz, Cádiz, Spain
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta Del Mar University Hospital, University of Cadiz, Cádiz, Spain
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23
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Rudnick DA, Huang J, Hidvegi T, Chu AS, Hale P, Munanairi A, Dietzen DJ, Cliften PF, Tycksen E, Lutkewitte AJ, Finck BN, Pak SC, Silverman GA, Perlmutter DH. Regulation of PGC1α Downstream of the Insulin Signaling Pathway Plays a Role in the Hepatic Proteotoxicity of Mutant α1-Antitrypsin Deficiency Variant Z. Gastroenterology 2022; 163:270-284. [PMID: 35301011 PMCID: PMC9232923 DOI: 10.1053/j.gastro.2022.03.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 03/05/2022] [Accepted: 03/08/2022] [Indexed: 01/18/2023]
Abstract
BACKGROUND & AIMS Insulin signaling is known to regulate essential proteostasis mechanisms. METHODS The analyses here examined effects of insulin signaling in the PiZ mouse model of α1-antitrypsin deficiency in which hepatocellular accumulation and proteotoxicity of the misfolded α1-antitrypsin Z variant (ATZ) causes liver fibrosis and cancer. RESULTS We first studied the effects of breeding PiZ mice to liver-insulin-receptor knockout (LIRKO) mice (with hepatocyte-specific insulin-receptor gene disruption). The results showed decreased hepatic ATZ accumulation and liver fibrosis in PiZ x LIRKO vs PiZ mice, with reversal of those effects when we bred PiZ x LIRKO mice onto a FOXO1-deficient background. Increased intracellular degradation of ATZ mediated by autophagy was identified as the likely mechanism for diminished hepatic proteotoxicity in PiZ x LIRKO mice and the converse was responsible for enhanced toxicity in PiZ x LIRKO x FOXO1-KO animals. Transcriptomic studies showed major effects on oxidative phosphorylation and autophagy genes, and significant induction of peroxisome proliferator-activated-receptor-γ-coactivator-1α (PGC1α) expression in PiZ-LIRKO mice. Because PGC1α plays a key role in oxidative phosphorylation, we further investigated its effects on ATZ proteostasis in our ATZ-expressing mammalian cell model. The results showed PGC1α overexpression or activation enhances autophagic ATZ degradation. CONCLUSIONS These data implicate suppression of autophagic ATZ degradation by down-regulation of PGC1α as one mechanism by which insulin signaling exacerbates hepatic proteotoxicity in PiZ mice, and identify PGC1α as a novel target for development of new human α1-antitrypsin deficiency liver disease therapies.
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Affiliation(s)
- David A. Rudnick
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110.,Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110
| | - Jiansheng Huang
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Tunda Hidvegi
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Andrew S. Chu
- Department of Pediatrics, Baylor College of Medicine
| | - Pamela Hale
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Admire Munanairi
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Dennis J. Dietzen
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Paul F. Cliften
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110.,The Genome Technology Access Center, Washington University School of Medicine, St. Louis, MO 63110
| | - Eric Tycksen
- The Genome Technology Access Center, Washington University School of Medicine, St. Louis, MO 63110
| | - Andrew J. Lutkewitte
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Brian N. Finck
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Stephen C. Pak
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Gary A. Silverman
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - David H. Perlmutter
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110.,Department of Cell Biology, Washington University School of Medicine, St. Louis, MO 63110
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24
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Yang X, Feng P, Ji R, Ren Y, Wei W, Hölscher C. Therapeutic application of GLP-1 and GIP receptor agonists in Parkinson's disease. Expert Opin Ther Targets 2022; 26:445-460. [PMID: 35584372 DOI: 10.1080/14728222.2022.2079492] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Diabetes is a risk factor for Parkinson's disease (PD) and shares similar dysregulated insulin pathways. Glucagon-like peptide-1 (GLP-1) analogs originally designed to treat diabetes have shown potent neuroprotective activity in preclinical studies of PD. They are neuroprotective by inhibiting inflammation, improving neuronal survival, maintenance of synapses, and dopaminergic transmission in the brain. Building on this, three clinical studies have reported impressive effects in patients with PD, testing exendin-4 (Exenatide, Bydureon) or liraglutide (Victoza, Saxenda). Glucose-dependent insulinotropic peptide (GIP) is another peptide hormone that has shown good effects in animal models of PD. Novel dual GLP-1/GIP agonists have been developed that can penetrate the blood-brain barrier (BBB) and show superior effects in animal models compared to GLP-1 drugs. AREAS COVERED The review summarizes preclinical and clinical studies testing GLP-1R agonists and dual GLP-1/GIPR agonists in PD and discusses possible mechanisms of action. EXPERT OPINION Current strategies to treat PD by lowering the levels of alpha-synuclein have not shown effects in clinical trials. It is time to move on from the 'misfolding protein' hypothesis. Growth factors such as GLP-1 that can cross the BBB have already shown impressive effects in patients and are the future of drug discovery in PD.
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Affiliation(s)
- Xiaoyan Yang
- Department of Neurology, Huadong Hospital Affiliated to Fudan University, No. 221 West Yan' an Road, Shanghai, China
| | - Peng Feng
- Department of Neurology, The Second Affiliated Hospital of Shanxi Medical University, No. 382 Wuyi Road, Taiyuan, 030001, Shanxi Province, China
| | - Rong Ji
- Department of Neurology, Huadong Hospital Affiliated to Fudan University, No. 221 West Yan' an Road, Shanghai, China
| | - Yiqing Ren
- Department of Neurology, Huadong Hospital Affiliated to Fudan University, No. 221 West Yan' an Road, Shanghai, China
| | - Wenshi Wei
- Department of Neurology, Huadong Hospital Affiliated to Fudan University, No. 221 West Yan' an Road, Shanghai, China
| | - Christian Hölscher
- Department of Neurology, The Second Affiliated Hospital of Shanxi Medical University, No. 382 Wuyi Road, Taiyuan, 030001, Shanxi Province, China.,Academy of Chinese Medical Science, Henan University of Traditional Chinese Medicine, No. 233 Zhongyuan Road, Zhengzhou, China
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25
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Exogenous Galanin Reduces Hyperglycemia and Myocardial Metabolic Disorders Induced by Streptozotocin in Rats. Int J Pept Res Ther 2022. [DOI: 10.1007/s10989-022-10412-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Zhang J, Kong DH, Huang X, Yu R, Yang Y. Physiological Functions of FBW7 in Metabolism. Horm Metab Res 2022; 54:280-287. [PMID: 35533672 DOI: 10.1055/a-1816-8903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
FBW7 is the recognition subunit of the SCF (Skp1-Cullin1-F-box proteins) E3 ubiquitin ligase complex, and it determines the specificity of the SCF substrate. SCFFBW7 is a recognized tumor suppressor because of its ability to degrade many proto-oncogenic substrates. Recent studies have shown that FBW7 plays a key role in metabolism by targeting the degradation of critical regulators involved in cellular metabolism in a ubiquitin-dependent manner. Here, we review recent studies, which highlight the important role of FBW7 in metabolism.
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Affiliation(s)
- Jianmei Zhang
- Department of Endocrinology and Metabolism, Weihai Municipal Hospital Affiliated to Shandong University, Weihai, China
- Department of Geriatrics, Weihai Municipal Hospital Affiliated to Shandong University, Weihai, China
| | - De-Huan Kong
- Department of Endocrinology, Taian City Central Hospital, Taian, China
| | - Xiaocheng Huang
- Department of Health examination, Weihai Municipal Hospital affiliated to Shandong University, Weihai, China
| | - Rongbo Yu
- Department of Geriatrics, Weihai Municipal Hospital Affiliated to Shandong University, Shangdong, China
| | - Yachao Yang
- Department of Endocrinology and Metabolism, Weihai Municipal Hospital Affiliated to Shandong University, Weihai, China
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27
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Liu P, Jiang L, Kong W, Xie Q, Li P, Liu X, Zhang J, Liu M, Wang Z, Zhu L, Yang H, Zhou Y, Zou J, Liu X, Liu L. PXR activation impairs hepatic glucose metabolism partly via inhibiting the HNF4 α-GLUT2 pathway. Acta Pharm Sin B 2022; 12:2391-2405. [PMID: 35646519 PMCID: PMC9136535 DOI: 10.1016/j.apsb.2021.09.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/05/2021] [Accepted: 09/16/2021] [Indexed: 01/20/2023] Open
Abstract
Drug-induced hyperglycemia/diabetes is a global issue. Some drugs induce hyperglycemia by activating the pregnane X receptor (PXR), but the mechanism is unclear. Here, we report that PXR activation induces hyperglycemia by impairing hepatic glucose metabolism due to inhibition of the hepatocyte nuclear factor 4-alpha (HNF4α)‒glucose transporter 2 (GLUT2) pathway. The PXR agonists atorvastatin and rifampicin significantly downregulated GLUT2 and HNF4α expression, and impaired glucose uptake and utilization in HepG2 cells. Overexpression of PXR downregulated GLUT2 and HNF4α expression, while silencing PXR upregulated HNF4α and GLUT2 expression. Silencing HNF4α decreased GLUT2 expression, while overexpressing HNF4α increased GLUT2 expression and glucose uptake. Silencing PXR or overexpressing HNF4α reversed the atorvastatin-induced decrease in GLUT2 expression and glucose uptake. In human primary hepatocytes, atorvastatin downregulated GLUT2 and HNF4α mRNA expression, which could be attenuated by silencing PXR. Silencing HNF4α downregulated GLUT2 mRNA expression. These findings were reproduced with mouse primary hepatocytes. Hnf4α plasmid increased Slc2a2 promoter activity. Hnf4α silencing or pregnenolone-16α-carbonitrile (PCN) suppressed the Slc2a2 promoter activity by decreasing HNF4α recruitment to the Slc2a2 promoter. Liver-specific Hnf4α deletion and PCN impaired glucose tolerance and hepatic glucose uptake, and decreased the expression of hepatic HNF4α and GLUT2. In conclusion, PXR activation impaired hepatic glucose metabolism partly by inhibiting the HNF4α‒GLUT2 pathway. These results highlight the molecular mechanisms by which PXR activators induce hyperglycemia/diabetes.
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28
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Studneva IM, Veselova OM, Dobrokhotov IV, Serebryakova LI, Palkeeva ME, Molokoedov AS, Azmuko AA, Ovchinnikov MV, Sidorova MV, Pisarenko OI. Chimeric Agonist of Galanin Receptor GALR2 Reduces Heart Damage in Rats with Streptozotocin-Induced Diabetes. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:346-355. [PMID: 35527373 DOI: 10.1134/s0006297922040046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 02/28/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Neuropeptide galanin and its N-terminal fragments reduce the generation of reactive oxygen species and normalize metabolic and antioxidant states of myocardium in experimental cardiomyopathy and ischemia/reperfusion injury. The aim of this study was to elucidate the effect of WTLNSAGYLLGPβAH-OH (peptide G), a pharmacological agonist of the galanin receptor GalR2, on the cardiac injury induced by administration of streptozotocin (STZ) in rats. Peptide G was prepared by solid phase peptide synthesis using the Fmoc strategy and purified by preparative HPLC; its structure was confirmed by 1H-NMR spectroscopy and MALDI-TOF mass spectrometry. Experimental animals were randomly distributed into five groups: C, control; S, STZ-treated; SG10, STZ + peptide G (10 nmol/kg/day); SG50, STZ + peptide G (50 nmol/kg/day); G, peptide G (50 nmol/kg/day). Administration of peptide G prevented hyperglycemia in SG50 rats. By the end of the experiment, the ATP content, total pool of adenine nucleotides, phosphocreatine (PCr) content, and PCr/ATP ratio in the myocardium of animals of the SG50 group were significantly higher than in rats of the S group. In the SG50 and SG10 groups, the content of lactate and lactate/pyruvate ratio in the myocardium were reduced, while the glucose content was increased vs. the S group. Both doses of peptide G reduced the activation of creatine kinase-MB and lactate dehydrogenase, as well as the concentration of thiobarbituric acid reactive products in the blood plasma of STZ-treated rats to the control values. Taken together, these results suggest that peptide G has cardioprotective properties in type 1 diabetes mellitus. Possible mechanisms of peptide G action in the STZ-induced diabetes are discussed.
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Affiliation(s)
- Irina M Studneva
- National Medical Research Center for Cardiology, Moscow, 121552, Russia
| | - Oksana M Veselova
- National Medical Research Center for Cardiology, Moscow, 121552, Russia
| | | | | | - Marina E Palkeeva
- National Medical Research Center for Cardiology, Moscow, 121552, Russia
| | | | - Andrey A Azmuko
- National Medical Research Center for Cardiology, Moscow, 121552, Russia
| | | | - Maria V Sidorova
- National Medical Research Center for Cardiology, Moscow, 121552, Russia
| | - Oleg I Pisarenko
- National Medical Research Center for Cardiology, Moscow, 121552, Russia.
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29
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An S, Wang D, Ma X, Liu C. Whole body vibration remodels skeletal muscle via autophagy and energy metabolism in diabetic mice. Mol Med Rep 2022; 25:182. [PMID: 35322859 PMCID: PMC8972300 DOI: 10.3892/mmr.2022.12698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 03/08/2022] [Indexed: 11/17/2022] Open
Abstract
Hyperglycemia occurs due to a defect in insulin secretion or impaired biological functions, or both. The long-term hyperglycemia during diabetes causes chronic damage and dysfunction of various tissues. Whole body vibration (WBV) has significant effects on lipid and glucose metabolism and endocrine and motor systems. In order to explore the effects of WBV on skeletal muscle, mice trained for 12 weeks with WBV (15 Hz, 30 min) were used as experimental subjects and their skeletal muscle morphology under the pathological state of diabetes was observed. In addition, the blood lipids, blood glucose, gastrocnemius muscle glycogen and mRNA and protein levels of autophagy and glucose metabolism biomarkers were compared among the three groups of mice via western blot and RT-qPCR. The results showed that WBV can significantly reshape skeletal muscle morphology and upregulate high density lipoprotein. The expression of glucose-6-phosphatase (G6P), Beclin1 and Atg7 in the gastrocnemius muscle of the WBV group was significantly increased. Therefore, it can be concluded that WBV promotes skeletal muscle remodeling in diabetic mice. The present study confirmed that WBV can attenuate the development of diabetes melitus (DM) and lead to lower level low density lipoprotein in the blood. In addition, G6P level plays an important role in WBV-treated DM model and may be used to monitor the effect of WBV in patients. The findings of the present study may provide a new molecular basis for WBV to play a therapeutic role in the treatment of diabetes and may have potential clinical applications in the future.
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Affiliation(s)
- Shanshan An
- First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Dahao Wang
- First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Xue Ma
- First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
| | - Chang Liu
- First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, P.R. China
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Excess glutamine does not alter myotube metabolism or insulin sensitivity. Amino Acids 2022; 54:455-468. [PMID: 35112170 DOI: 10.1007/s00726-022-03131-x] [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: 08/12/2021] [Accepted: 01/15/2022] [Indexed: 11/01/2022]
Abstract
Glutamine is an amino acid previously linked with improved skeletal muscle metabolism and insulin signaling, however, past observations often use cell culture models with only supraphysiological concentrations. Additionally, past reports have yet to simultaneously investigate both metabolic outcomes and insulin signaling. The present report utilized cell culture experiments and measured the effects of both physiological and supraphysiological levels of glutamine on myotube metabolism and insulin signaling/resistance. It was hypothesized the addition of glutamine at any level would increase cell metabolism and related gene expression, as well as improve insulin signaling versus respective control cells. C2C12 myotubes were treated with glutamine ranging from 0.25 mM-4 mM (or media control) for 24 h to capture a range of physiological and supraphysiological concentrations. qRT-PCR was used to measure metabolic gene expression. Mitochondrial and glycolytic metabolism were measured via oxygen consumption and extracellular acidification rate, respectively. Insulin sensitivity (indicated by pAkt:Akt) and metabolism following glucose/insulin infusion were also assessed. Glutamine treatment consistently increased mitochondrial and glycolytic metabolism versus true controls (cells treated with media void of glutamine), however, supraphysiological glutamine did not enhance metabolism beyond that of cells with physiological levels of glutamine. Neither physiological nor supraphysiological levels of glutamine altered insulin signaling regardless of insulin stimulation or insulin resistance when compared with respective controls. These data demonstrate excess glutamine does not appear to alter myotube metabolism or glucose disposal when base levels of glutamine are present. Moreover, glutamine does not appear to alter insulin sensitivity regardless of level of insulin resistance or presence of insulin stimulation.
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Roy P, Saha S, Chakraborty J. Looking into the possibilities of cure of the type 2 diabetes mellitus by nanoparticle-based RNAi and CRISPR-Cas9 system: A review. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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AICAR stimulates mitochondrial biogenesis and BCAA catabolic enzyme expression in C2C12 myotubes. Biochimie 2021; 195:77-85. [PMID: 34798200 DOI: 10.1016/j.biochi.2021.11.004] [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: 08/31/2021] [Revised: 10/27/2021] [Accepted: 11/11/2021] [Indexed: 11/21/2022]
Abstract
Type 2 diabetes is characterized by reduced insulin sensitivity, elevated blood metabolites, and reduced mitochondrial metabolism. Insulin resistant populations often exhibit reduced expression of genes governing mitochondrial metabolism such as peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α). Interestingly, PGC-1α regulates the expression of branched-chain amino acid (BCAA) metabolism, and thus, the consistently observed increased circulating levels of BCAA in diabetics may be partially explained by reduced PGC-1α expression. Conversely, PGC-1α upregulation appears to increase BCAA catabolism. PGC-1α activity is regulated by 5'-AMP-activated protein kinase (AMPK), however, only limited experimental data exists on the effect of AMPK activation in the regulation of BCAA catabolism. The present report examined the effects of the commonly used AMPK activator 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR) on the metabolism and expression of several related targets (including BCAA catabolic enzymes) of cultured myotubes. C2C12 myotubes were treated with AICAR at 1 mM for up to 24 h. Mitochondrial and glycolytic metabolism were measured via oxygen consumption and extracellular acidification rate, respectively. Metabolic gene and protein expression were assessed via qRT-PCR and western blot, respectively. AICAR treatment significantly increased mitochondrial content and peak mitochondrial capacity. AICAR treatment also increased AMPK activation and mRNA expression of several regulators of mitochondrial biogenesis but reduced glycolytic metabolism and mRNA expression of several glycolytic enzymes. Interestingly, branched-chain alpha-keto acid dehydrogenase a (BCKDHa) protein was significantly increased following AICAR-treatment suggesting increased overall BCAA catabolic capacity in AICAR-treated cells. Together, these experiments demonstrate AICAR/AMPK activation can upregulate BCAA catabolic machinery in a model of skeletal muscle.
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Lin W, Jin Y, Hu X, Huang E, Zhu Q. AMPK/PGC-1α/GLUT4-Mediated Effect of Icariin on Hyperlipidemia-Induced Non-Alcoholic Fatty Liver Disease and Lipid Metabolism Disorder in Mice. BIOCHEMISTRY. BIOKHIMIIA 2021; 86:1407-1417. [PMID: 34906049 DOI: 10.1134/s0006297921110055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 07/21/2021] [Accepted: 10/22/2021] [Indexed: 06/14/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the most common liver disease in the world. Therapeutic activity of icariin, a major bioactive component of Epimedii Herba, in NAFLD is still unknown. Herein, the C57BL/6J mice were fed with a high-fat diet for 16 weeks to establish a NAFLD model. Mice were assigned to five groups: control group, NAFLD group, and icariin treatment groups. Effects of icariin on blood indices, glucose tolerance, insulin sensitivity, histopathological morphology, cell apoptosis, lipid accumulation, and AMPK signaling were analyzed. In addition, another cohort of mice were assigned to five groups: control group, NAFLD group, dorsomorphin treatment group, icariin treatment group, and dorsomorphin + icariin treatment group. Expression of proteins in liver tissues associated with AMPK signaling, and levels of ALT and AST were evaluated. Icariin attenuated the NAFLD-induced increase of the TG, TC, LDL-C, ALT, AST levels. HDL-C levels were affected neither by NAFLD nor by icariin. Furthermore, icariin treatment (100-200 mg/kg) counteracted the NAFLD-reduced glucose tolerance and insulin sensitivity and modulated histopathological changes, cell apoptosis, and lipid accumulation in liver tissues. Additionally, icariin mitigated the NAFLD-induced up-regulation of the cleaved caspase 3/9, SREBP-1c, and DGAT-2 levels, and enhanced the expression level of CPT-1, p-ACC/ACC, AMPKα1, PGC-1α, and GLUT4. Effects of icariin on the AMPK signaling and levels of AST and ALT could be reversed by AMPK inhibitor, dorsomorphin. This paper investigates the glucose-reducing and lipid-lowering effects of icariin in NAFLD. Moreover, icariin might function through activating the AMPKα1/PGC-1α/GLTU4 pathway.
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Affiliation(s)
- Wei Lin
- Department of General Medicine, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.
| | - Yin Jin
- Department of Gastroenterology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.
| | - Xiang Hu
- Department of Endocrinology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.
| | - Erjiong Huang
- Department of Gastroenterology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.
| | - Qihan Zhu
- Department of Endocrinology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.
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Lee TW, Liu HW, Lin YF, Lee TI, Kao YH, Chen YJ. Histone deacetylase inhibition improves metabolism and mitochondrial dynamics: A potential novel therapeutic strategy for sarcopenia coexisting with diabetes mellitus. Med Hypotheses 2021; 158:110724. [PMID: 34753007 DOI: 10.1016/j.mehy.2021.110724] [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: 06/02/2021] [Revised: 09/14/2021] [Accepted: 10/10/2021] [Indexed: 11/16/2022]
Abstract
Sarcopenia, the age-associated-fragility with loss of skeletal muscle mass and function, often coexists with type 2 diabetes (T2D) in older individuals. Derangement of muscle metabolism and mitochondrial dynamics is critical, particularly in high-energy-demand organs in patients with metabolic disorder. However, targeted therapies to halt or reverse the pathological progression of sarcopenia coexisting with T2D are unavailable. Studies have identified the pathological roles of class I histone deacetylases (HDACs) in both T2D and sarcopenia. In addition to their proinflammatory properties, HDACs are known to modify muscle metabolism and mitochondrial dynamics in both the development of sarcopenia and pathogenesis of diabetes. Proper quality control of mitochondrial dynamics through protein degradation and the synthesis of new proteins may improve skeletal muscle function in sarcopenia. Class I HDAC inhibitors improve energy metabolism and modulate autophagy-related genes in skeletal muscle. However, class IIa HDAC4 plays a protective role in preserving skeletal muscle structure following long-term denervation, and selective inhibition of class IIa HDAC activity had no impact on oxidative metabolism of muscle mitochondria. These findings suggest the vital role of class I HDAC modulation in bioenergetics and mitochondria quality control, and may lead to a novel therapeutic strategy targeting sarcopenia that coexists with T2D. HDAC inhibitors have been approved for clinical applications, and interventions targeting on HDACs may be promising for the treatment of sarcopenia.
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Affiliation(s)
- Ting-Wei Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Division of Endocrinology and Metabolism, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Han-Wen Liu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Yuan-Feng Lin
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ting-I Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Division of Endocrinology and Metabolism, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Department of General Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
| | - Yu-Hsun Kao
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Medical Education and Research, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan.
| | - Yi-Jen Chen
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Division of Cardiovascular Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Cardiovascular Research Center, Wan Fan Hospital, Taipei Medical University, Taipei, Taiwan; Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan
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Molecular dynamics of estrogen-related receptors and their regulatory proteins: roles in transcriptional control for endocrine and metabolic signaling. Anat Sci Int 2021; 97:15-29. [PMID: 34609710 DOI: 10.1007/s12565-021-00634-7] [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: 07/29/2021] [Accepted: 09/23/2021] [Indexed: 10/20/2022]
Abstract
Estrogen-related receptor (ERR) is a member of the nuclear receptor (NR) superfamily and has three subtypes α, β, and γ. Despite their strong homology with estrogen receptor (ER) α, ERRs cannot accommodate endogenous hormones. However, they are able to regulate gene expression without ligand binding. ERRα and ERRγ orchestrate the expression of genes involved in bioenergetic pathways, while ERRβ controls placental development and stem cell maintenance. Evidence from recent studies, including clinical research, has also demonstrated close associations of ERRs with the pathophysiology of hormone-related cancers and metabolic disorders including type 2 diabetes mellitus. This review summarizes the basic knowledge and recent advances in ERRs and their associated proteins, focusing on the subcellular dynamics involved in transcriptional regulation. Fluorescent protein labeling enabled monitoring of ERRs in living cells and revealed previously unrecognized characteristics. Using this technique, we demonstrated a role of ERRβ in controlling estrogen signaling by regulating the subnuclear dynamics of ligand-activated ERα. Visualization of ERRs and related proteins and subsequent analyses also revealed a function of ERRγ in promoting liver lactate metabolism in association with LRPGC1, a recently identified lactic acid-responsive protein. These findings suggest that ERRs activate unique transregulation mechanisms in response to extracellular stimuli such as hormones and metabolic signals, implying an adaptive system behind the cellular homeostatic regulation by orphan NRs. Control of subcellular ERR dynamics will contribute toward the development of therapeutic approaches to treat various diseases including hormone-related cancers and metabolic disorders associated with abnormal ERR signaling pathways.
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PP2 Ameliorates Renal Fibrosis by Regulating the NF- κB/COX-2 and PPAR γ/UCP2 Pathway in Diabetic Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:7394344. [PMID: 34580604 PMCID: PMC8464423 DOI: 10.1155/2021/7394344] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 08/24/2021] [Accepted: 08/27/2021] [Indexed: 12/29/2022]
Abstract
Renal fibrosis is characterized by glomerulosclerosis and tubulointerstitial fibrosis in diabetic nephropathy (DN). We aimed to evaluate the effects of PP2 on renal fibrosis of DN. GSE33744 and GSE86300 were downloaded from the GEO database. Firstly, 839 DEGs were identified between nondiabetic and diabetic mice renal glomerular samples. COX-2 was selected to assess the effects of PP2 on renal glomerulosclerosis. In db/db mice, PP2 decreased the expression of COX-2, phosphorylated p65, and fibrotic proteins, accompanied with attenuated renal glomerulosclerosis. In cultured glomerular mesangial cells, high glucose- (HG-) induced p65 phosphorylation and COX-2 expression were attenuated by PP2 or NF-κB inhibitor PDTC. PP2, PDTC, or COX-2 inhibitor NS-398 ameliorated abnormal proliferation and expression of fibrotic proteins induced by HG. Secondly, 238 DEGs were identified between nondiabetic and diabetic mice renal cortex samples. UCP2 was selected to assess the effects of PP2 on renal tubulointerstitial fibrosis. In db/db mice, PP2 decreased the expression of PPARγ and UCP2, accompanied with attenuated renal tubulointerstitial fibrosis and EMT. In cultured proximal tubular cells, HG-induced PPARγ and UCP2 expression was inhibited by PP2 or PPARγ antagonist GW9662. PP2, GW9662, or UCP2 shRNA ameliorated HG-induced EMT. These results indicated that PP2 ameliorated renal fibrosis in diabetic mice.
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Fang P, Han L, Yu M, Han S, Wang M, Huang Y, Guo W, Wei Q, Shang W, Min W. Development of metabolic dysfunction in mice lacking chemerin. Mol Cell Endocrinol 2021; 535:111369. [PMID: 34171420 DOI: 10.1016/j.mce.2021.111369] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/06/2021] [Accepted: 06/14/2021] [Indexed: 02/01/2023]
Abstract
Chemerin, an adipocyte-secreted adipokine, is hypothesized to participate in energy homeostasis and glucoregulation. However, the physiologic effect of endogenous chemerin on glucose metabolism is unclear. The present studies tested the hypotheses that chemerin deficiency alters whole-body glucose homeostasis following switches to high-fat diet. Adult, male chemerin knockout and C57BL/6J control wild type mice were studied. During the following 4 weeks, chow- or high-fat diet maintained chemerin knockout mice showed elevated fasting glucose levels and glucose intolerance as well as insulin intolerance. Chemerin deficiency impaired adaptation to glucose and insulin challenge, leading to increased glucose levels. Moreover, the mRNA and protein levels of GLUT4 and PGC-1α expression in both skeletal muscle and adipose tissue were significantly decreased in chemerin knockout mice relative to the wild type, respectively. Taken together, the results support the hypotheses that chemerin helps adapt glucose metabolism to changes in dietary fat and modulates glucose consumption in mice by activation of PGC-1α/GLUT4 axis. Chemerin may play a significant role in elevation of glucose uptake and insulin sensitivity to promote glucose clearance.
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Affiliation(s)
- Penghua Fang
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Long Han
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Mei Yu
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Shiyu Han
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Mengyuan Wang
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yujie Huang
- Department of Endocrinology, Medical College, Yangzhou University, Yangzhou, Jiangsu, 225001, China
| | - Wancheng Guo
- Department of Endocrinology, Medical College, Yangzhou University, Yangzhou, Jiangsu, 225001, China
| | - Qingbo Wei
- Key Laboratory of Acupuncture and Medicine Research of Minister of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Wenbing Shang
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Wen Min
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China; Department of Bone Injury of Traditional Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China.
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Hao Q, Zheng A, Zhang H, Cao H. Down-regulation of betatrophin enhances insulin sensitivity in type 2 diabetes mellitus through activation of the GSK-3β/PGC-1α signaling pathway. J Endocrinol Invest 2021; 44:1857-1868. [PMID: 33464548 DOI: 10.1007/s40618-020-01493-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 12/23/2020] [Indexed: 12/23/2022]
Abstract
OBJECTIVE The incidence of type 2 diabetes mellitus (T2DM) among children and adolescents has been rising. Accumulating evidences have noted the significant role of betatrophin in the regulation of lipid metabolism and glucose homeostasis. In our study, we tried to figure out the underlying mechanism of betatrophin in insulin resistance (IR) in type 2 diabetes mellitus (T2DM). METHODS First, fasting serum betatrophin, fasting blood glucose (FBG), insulin, total cholesterol (TC), triglyceride (TG), and low-density lipoprotein cholesterol (LDL-C) were detected in T2DM children. The homeostasis model assessment of insulin resistance (HOMA-IR), Gutt insulin sensitivity index (ISIG) and Matsuda insulin sensitivity index (ISIM) were calculated. A T2DM-IR mouse model was induced by high-fat diet, with the expression of GSK-3β and PGC-1α detected. Besides, HepG2 cells were induced by a high concentration of insulin to establish an IR cell model (HepG2-IR). The cell viability, glucose consumption, liver glycogen content, inflammation, and fluorescence level of GSK-3β and PGC-1α were analyzed. RESULTS Betatrophin was highly expressed in serum of T2DM children and was positively correlated with FBG, insulin, TC, TG, LDL-C and HOMA-IR, while negatively correlated with ISIG and ISIM. Betatrophin and GSK-3β in the liver tissues of T2DM-IR mice were increased, while the PGC-1α expression was decreased. Betatrophin expression was negatively correlated with PGC-1α and positively correlated with GSK-3β. Silencing of betatrophin enhanced insulin sensitivity through the activation of GSK-3β/PGC-1α signaling pathway. In vitro experiments also found that silencing of betatrophin promoted glucose consumption and glycogen synthesis while inhibited inflammation. CONCLUSION Our findings concluded that silencing of betatrophin could enhance insulin sensitivity and improve histopathological morphology through the activation of GSK-3β/PGC-1α signaling pathway.
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Affiliation(s)
- Q Hao
- Department of Endocrinology, The First People's Hospital of Shangqiu, No.292 Kaixuan South Road, Shangqiu, 476100, Henan, People's Republic of China
| | - A Zheng
- College of Biology and Food, Shangqiu Normal University, Shangqiu, 476000, Henan, People's Republic of China
| | - H Zhang
- Department of Endocrinology, The First People's Hospital of Shangqiu, No.292 Kaixuan South Road, Shangqiu, 476100, Henan, People's Republic of China
| | - H Cao
- Department of Endocrinology, The First People's Hospital of Shangqiu, No.292 Kaixuan South Road, Shangqiu, 476100, Henan, People's Republic of China.
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Shi Z, Wang S, Deng J, Gong Z. PGC-1α attenuates the oxidative stress-induced impaired osteogenesis and angiogenesis regulation effects of mesenchymal stem cells in the presence of diabetic serum. Biochem Biophys Rep 2021; 27:101070. [PMID: 34286110 PMCID: PMC8278528 DOI: 10.1016/j.bbrep.2021.101070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 11/30/2022] Open
Abstract
Oxidative stress is believed to induce dysfunction of the bone remodeling process and be associated with progressive loss of bone mass. The peroxisome proliferator-activated receptor gamma coactivator 1α (PGC-1α) is a master controller during mitochondrial biogenesis and the antioxidant response. We postulated that PGC-1α could function as a cyto-protective effector in mesenchymal stem cells (MSCs) under oxidative stress conditions. In this study, diabetic serum was firstly used to treat MSCs to induce oxidative damage. The anti-oxidative protective effects of PGC-1α overexpression on MSCs, as well as MSCs' osteogenesis and angiogenic regulation effects were investigated in vitro. Results showed that diabetic conditions induced significantly increase of intracellular oxidative damage and mitochondrial permeability transition pore (mPTP) opening activity, decrease of cellular viability, and osteogenic differentiation and pro-angiogenic regulation effects of MSCs. However, the diabetic conditions induced oxidative impair on MSCs were significantly alleviated via PGC-1α overexpression under diabetic conditions. Taken together, this study indicates the anti-oxidative treatment potential of PGC-1α regulation as a promising strategy to promote coupling pro-osteogenesis and pro-angiogenesis effects of MSCs.
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Affiliation(s)
- Zongxin Shi
- Department of Orthopedic Surgery, Liangxiang Hospital of Beijing Fangshan District, and Liangxiang Teaching Hospital of Capital Medical University, No.45, Gongchen Ave., Liangxiang, Fangshan Dist., Beijing, 102488, China
| | - Shikun Wang
- Department of Orthopedic Surgery, Liangxiang Hospital of Beijing Fangshan District, and Liangxiang Teaching Hospital of Capital Medical University, No.45, Gongchen Ave., Liangxiang, Fangshan Dist., Beijing, 102488, China
| | - Jiechao Deng
- Department of Orthopedic Surgery, Liangxiang Hospital of Beijing Fangshan District, and Liangxiang Teaching Hospital of Capital Medical University, No.45, Gongchen Ave., Liangxiang, Fangshan Dist., Beijing, 102488, China
| | - Zishun Gong
- Department of Orthopedic Surgery, Liangxiang Hospital of Beijing Fangshan District, and Liangxiang Teaching Hospital of Capital Medical University, No.45, Gongchen Ave., Liangxiang, Fangshan Dist., Beijing, 102488, China
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Zhang K, Zhang H, Hochner H, Chen J. Covariate adjusted inference of parent-of-origin effects using case-control mother-child paired multilocus genotype data. Genet Epidemiol 2021; 45:830-847. [PMID: 34424572 DOI: 10.1002/gepi.22428] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 07/08/2021] [Accepted: 07/27/2021] [Indexed: 01/13/2023]
Abstract
It is of great interest to identify parent-of-origin effects (POEs) since POEs play an important role in many human heritable disorders and human early life growth and development. POE is sometimes referred to as imprinting effect in the literature. Compared with the standard logistic regression analyses, retrospective likelihood-based statistical methods are more powerful in identifying POEs when data are collected from related individuals retrospectively. However, none of existing retrospective-based methods can appropriately incorporate covariates that should be adjusted for if they are confounding factors. In this paper, a novel semiparametric statistical method, M-HAP, is developed to detect POEs by fully exploring available information from multilocus genotypes of case-control mother-child pairs and covariates. Some large sample properties are established for M-HAP. Finite sample properties of M-HAP are illustrated by extensive simulation studies and real data applications to the Jerusalem Perinatal Study and the Danish National Birth Cohort study, which confirm the desired superiority of M-HAP over some existing methods. M-HAP has been implemented in the updated R package CCMO.
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Affiliation(s)
- Kai Zhang
- Department of Statistics and Finance, School of Management, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
| | - Hong Zhang
- Department of Statistics and Finance, School of Management, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
| | - Hagit Hochner
- Braun School of Public Health, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Jinbo Chen
- Department of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
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Lyu AR, Kim TH, Shin SA, Kim EH, Yu Y, Gajbhiye A, Kwon HC, Je AR, Huh YH, Park MJ, Park YH. Hearing Impairment in a Mouse Model of Diabetes Is Associated with Mitochondrial Dysfunction, Synaptopathy, and Activation of the Intrinsic Apoptosis Pathway. Int J Mol Sci 2021; 22:ijms22168807. [PMID: 34445504 PMCID: PMC8395823 DOI: 10.3390/ijms22168807] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 07/26/2021] [Accepted: 08/13/2021] [Indexed: 11/16/2022] Open
Abstract
Although previous studies continuously report an increased risk of hearing loss in diabetes patients, the impact of the disease on the inner ear remains unexplored. Herein, we examine the pathophysiology of diabetes-associated hearing impairment and cochlear synaptopathy in a mouse model of diabetes. Male B6.BKS(D)-Leprdb/J (db/db, diabetes) and heterozygote (db/+, control) mice were assigned into each experimental group (control vs. diabetes) based on the genotype and tested for hearing sensitivity every week from 6 weeks of age. Each cochlea was collected for histological and biological assays at 14 weeks of age. The diabetic mice exerted impaired hearing and a reduction in cochlear blood flow and C-terminal-binding protein 2 (CtBP2, a presynaptic ribbon marker) expression. Ultrastructural images revealed severely damaged mitochondria from diabetic cochlea accompanied by a reduction in Cytochrome c oxidase subunit 4 (COX4) and CR6-interacting factor 1 (CRIF1). The diabetic mice presented significantly decreased levels of platelet endothelial cell adhesion molecule (PECAM-1), B-cell lymphoma 2 (BCL-2), and procaspase-9, but not procaspase-8. Importantly, significant changes were not found in necroptotic programmed cell death markers (receptor-interacting serine/threonine-protein kinase 1, RIPK1; RIPK3; and mixed lineage kinase domain-like pseudokinase, MLKL) between the groups. Taken together, diabetic hearing loss is accompanied by synaptopathy, microangiopathy, damage to the mitochondrial structure/function, and activation of the intrinsic apoptosis pathway. Our results imply that mitochondrial dysfunction is deeply involved in diabetic hearing loss, and further suggests the potential benefits of therapeutic strategies targeting mitochondria.
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Affiliation(s)
- Ah-Ra Lyu
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.-R.L.); (E.-H.K.); (Y.Y.)
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.G.); (H.-C.K.)
| | - Tae-Hwan Kim
- Biomedical Convergence Research Center, Chungnam National University Hospital, Daejeon 35015, Korea;
| | - Sun-Ae Shin
- Brain Research Institute, College of Medicine, Chungnam National University, Daejeon 35015, Korea;
| | - Eung-Hyub Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.-R.L.); (E.-H.K.); (Y.Y.)
| | - Yang Yu
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.-R.L.); (E.-H.K.); (Y.Y.)
| | - Akanksha Gajbhiye
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.G.); (H.-C.K.)
| | - Hyuk-Chan Kwon
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.G.); (H.-C.K.)
| | - A Reum Je
- Electron Microscopy Research Center, Korea Basic Science Institute, Cheongju 28119, Korea; (A.R.J.); (Y.H.H.)
| | - Yang Hoon Huh
- Electron Microscopy Research Center, Korea Basic Science Institute, Cheongju 28119, Korea; (A.R.J.); (Y.H.H.)
| | - Min Jung Park
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.-R.L.); (E.-H.K.); (Y.Y.)
- Brain Research Institute, College of Medicine, Chungnam National University, Daejeon 35015, Korea;
- Correspondence: (M.J.P.); (Y.-H.P.)
| | - Yong-Ho Park
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.-R.L.); (E.-H.K.); (Y.Y.)
- Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Korea; (A.G.); (H.-C.K.)
- Biomedical Convergence Research Center, Chungnam National University Hospital, Daejeon 35015, Korea;
- Brain Research Institute, College of Medicine, Chungnam National University, Daejeon 35015, Korea;
- Correspondence: (M.J.P.); (Y.-H.P.)
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Tsosura TVS, Mattera MSDLC, Chiba FY, Carnevali ACN, Belardi BE, Dos Santos RM, Cintra LTA, Lopes FL, Scaramele NF, Matsushita DH. Effect of maternal apical periodontitis on the final step of insulin signalling and inflammatory pathway in the adult male offspring of rats. Int Endod J 2021; 54:2113-2124. [PMID: 34389996 DOI: 10.1111/iej.13610] [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: 05/20/2021] [Accepted: 08/11/2021] [Indexed: 11/28/2022]
Abstract
AIM To evaluate the final step of insulin signalling, inflammatory pathway (related to the inhibition of insulin signalling), peroxisome proliferator-activated receptor-gamma coactivator 1α (PGC-1α) protein content and DNA methylation in the Slc2a4 gene promoter region in the skeletal muscle of adult male offspring of rats with apical periodontitis (AP) in a single tooth or in four teeth. METHODOLOGY Female Wistar rats were distributed into three groups: a control group, a group with one tooth with AP and a group with four teeth with AP. Thirty days after induction of AP, female rats from all groups were mated with healthy male rats. When male offspring reached 75 days of age, the following analyses were performed in the gastrocnemius muscle (GM): insulin-stimulated Akt serine and threonine phosphorylation status; NF-κB p50 and p65 subunits phosphorylation status; GLUT4, TNF-α and PGC-1α protein content by Western blotting; GLUT4 and TNF-α gene expression by real-time polymerase chain reaction (PCR); and DNA methylation in the Slc2a4 gene promoter region by restriction digestion and real-time PCR. Analysis of variance was performed, followed by Tukey's post hoc test. p values <.05 were considered to be statistically significant. RESULTS Maternal AP in four teeth decreased insulin-stimulated Akt serine and threonine phosphorylation status, reduced GLUT4 gene expression and its protein content, and increased NF-κB p50 and p65 subunits phosphorylation status in the GM of adult offspring. There were no alterations in the parameters analysed in the GM of adult offspring of rats with AP in a single tooth. In addition, maternal AP did not affect TNF-α gene expression and its protein content, PGC-1α protein content and DNA methylation in the Slc2a4 gene promoter region in the GM of adult offspring. CONCLUSIONS Maternal AP in four teeth was associated with impairment in the final step of insulin signalling in the GM of adult male offspring in rats. An increase in NF-κB activity may be involved in this decrease in insulin signalling. This study demonstrates the impact of maternal AP on the health of offspring, demonstrating the importance of maintaining adequate maternal oral health to prevent diseases in adult offspring in rats.
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Affiliation(s)
- Thaís Verônica Saori Tsosura
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil.,Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | | | - Fernando Yamamoto Chiba
- Department of Preventive and Restorative Dental, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | | | - Bianca Elvira Belardi
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil.,Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Rodrigo Martins Dos Santos
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil.,Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Luciano Tavares Angelo Cintra
- Department of Preventive and Restorative Dental, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Flávia Lombardi Lopes
- Department of Production and Animal Health, School of Veterinary Medicine, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Natália Francisco Scaramele
- Department of Production and Animal Health, School of Veterinary Medicine, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Doris Hissako Matsushita
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil.,Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas (PPGMCF)/Sociedade Brasileira de Fisiologia (SBFis), School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
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43
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Rivera ME, Vaughan RA. Comparing the effects of palmitate, insulin, and palmitate-insulin co-treatment on myotube metabolism and insulin resistance. Lipids 2021; 56:563-578. [PMID: 34382222 DOI: 10.1002/lipd.12315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 05/05/2021] [Accepted: 05/25/2021] [Indexed: 11/11/2022]
Abstract
Previous studies have shown various metabolic stressors such as saturated fatty acids (SFA) and excess insulin promote insulin resistance in metabolically meaningful cell types (such as skeletal muscle). Additionally, these stressors have been linked with suppressed mitochondrial metabolism, which is also a common characteristic of skeletal muscle of diabetics. This study characterized the individual and combined effects of excess lipid and excess insulin on myotube metabolism and related metabolic gene and protein expression. C2C12 myotubes were treated with either 500 μM palmitate (PAM), 100 nM insulin (IR), or both (PAM-IR). qRT-PCR and western blot were used to measure metabolic gene and protein expression, respectively. Oxygen consumption was used to measure mitochondrial metabolism. Glycolytic metabolism and insulin-mediated glucose uptake were measured via extracellular acidification rate. Cellular lipid and mitochondrial content were measured using Nile Red and NAO staining, respectively. IR and PAM-IR treatments led to reductions in p-Akt expression. IR treatment reduced insulin mediated glucose metabolism while PAM and PAM-IR treatment showed increases with concurrent reductions in mitochondrial metabolism. All three treatments showed suppression in mitochondrial metabolism. PAM and PAM-IR also showed increases in glycolytic metabolism. While PAM and PAM-IR significantly increased lipid content, expression of inflammatory and lipogenic proteins were unaltered. Lastly, PAM-IR reduced BCAT2 protein expression, a regulator of BCAA metabolism. Both stressors independently reduced insulin signaling, mitochondrial function, and cell metabolism, however, only PAM-IR co-treatment significantly reduced the expression of regulators of metabolism not seen with individual stressors, suggesting an additive effect of stressors on metabolic programming.
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Affiliation(s)
- Madison E Rivera
- Department of Exercise Science, High Point University, High Point, North Carolina, USA
| | - Roger A Vaughan
- Department of Exercise Science, High Point University, High Point, North Carolina, USA
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Yang SS, Chen YH, Hu JT, Chiu CF, Hung SW, Chang YC, Chiu CC, Chuang HL. Aldehyde Dehydrogenase Mutation Exacerbated High-Fat-Diet-Induced Nonalcoholic Fatty Liver Disease with Gut Microbiota Remodeling in Male Mice. BIOLOGY 2021; 10:biology10080737. [PMID: 34439969 PMCID: PMC8389693 DOI: 10.3390/biology10080737] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 07/12/2021] [Accepted: 07/27/2021] [Indexed: 01/02/2023]
Abstract
Simple Summary ALDH2, mitochondrial aldehyde dehydrogenase 2, is a critical enzyme involved in ethanol clearance in acetaldehyde metabolism. The prevalence of the ALDH2*2 variant is 45% in the Taiwanese population. ALDH2 reportedly has protective properties on myocardial damage, stroke, and diabetic retina damage. However, the effects of ALDH2 in modulation of metabolic syndromes remain unclear. The study evaluated the roles of ALDH2 in a high-fat-diet-induced metabolic syndrome in mice. We explored the effects of ALDH2 gene on NAFLD and potential association with gut microbiota. Abstract Mitochondrial aldehyde dehydrogenase 2 (ALDH2) is a critical enzyme involved in ethanol clearance in acetaldehyde metabolism and plays a key role in protecting the liver. The ALDH2*2 mutation causes a significant decrease in acetaldehyde scavenging capacity, leading to the accumulation of acetaldehyde after consuming alcohol. The prevalence of the ALDH2*2 variant is in 45% of Taiwanese individuals. ALDH2 reportedly has protective properties on myocardial damage, stroke, and diabetic retina damage. However, the effects of ALDH2 in the modulation of metabolic syndromes remain unclear. This study evaluates the roles of ALDH2 in a high-fat-diet-induced metabolic syndrome in mice. Male (M) and female (F) wild-type (WT) and ALDH2 knock-in C57BL/6J mice (4–5 weeks old) were fed a high-fat diet for 16 weeks. Results showed that the body and white-adipose-tissue weights were significantly increased in ALDH2-M compared to those in the other groups. We observed markedly elevated serum levels of alanine transaminase and glucose. Oral glucose-tolerance test and homeostasis-model assessment of insulin resistance (HOMA-IR) values were significantly higher in ALDH2-M mice than those in WT-M mice, with no observable differences in female mice. Abundant steatosis and inflammatory cells were observed in ALDH2-M, with significantly decreased expression of hepatic genes IRS2, GLUT4, and PGC-1α compared to that in WT-M. ALDH2 gene mutation also affected the β-diversity of gut microbiota in ALDH2-M resulting in the decreased abundance of Actinobacteria and an increase in Deferribacteres. Our results suggest that potential changes in gut microbiota may be associated with the defective ALDH2 exacerbation of high-fat-diet-induced liver diseases in male mice. However, female mice were not affected, and sex hormones may be an important factor that requires further investigation.
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Affiliation(s)
- Sien-Sing Yang
- Liver Center, Cathay General Hospital Medical Center, Taipei 106, Taiwan; (S.-S.Y.); (J.-T.H.)
| | - Yi-Hsun Chen
- Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan;
| | - Jui-Ting Hu
- Liver Center, Cathay General Hospital Medical Center, Taipei 106, Taiwan; (S.-S.Y.); (J.-T.H.)
| | - Ching-Feng Chiu
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei 110, Taiwan;
| | - Shao-Wen Hung
- Division of Animal Industry, Animal Technology Research Center, Agricultural Technology Research Institute, Miaoli 350, Taiwan; (S.-W.H.); (C.-C.C.)
| | - Yi-Chih Chang
- Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung 413, Taiwan;
| | - Chien-Chao Chiu
- Division of Animal Industry, Animal Technology Research Center, Agricultural Technology Research Institute, Miaoli 350, Taiwan; (S.-W.H.); (C.-C.C.)
| | - Hsiao-Li Chuang
- National Laboratory Animal Center, National Applied Research Laboratories, Taipei 115, Taiwan
- Correspondence:
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Ige AO, Adekanye OS, Adewoye EO. Intermittent exposure to green and white light-at-night activates hepatic glycogenolytic and gluconeogenetic activities in male Wistar rats. J Basic Clin Physiol Pharmacol 2021:jbcpp-2020-0251. [PMID: 34147042 DOI: 10.1515/jbcpp-2020-0251] [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: 09/09/2020] [Accepted: 04/15/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Exposure to light-at-night (LAN) has been reported to impair blood glucose regulation. The liver modulates blood glucose through mechanisms influenced by several factors that include peroxisome proliferator-activated receptor gamma coactivator-1alpha (PGC-1α) and glucose-6-phosphatase (G6Pase). This study investigated the effect of intermittent exposure to green and white LAN on some hepatic glucose regulatory factors in male Wistar rats. METHODS Animals were divided into three equal groups. Group I (control) was exposed to normal housing conditions. Groups II and III were each daily exposed to either green or white LAN for 2 h (7-9 pm) for 14 days. Body weight and blood glucose was monitored on days 0, 7, and 14. Thereafter, retro-orbital sinus blood was obtained after light thiopental anaesthesia and serum insulin was determined. Liver samples were also obtained and evaluated for glycogen, PGC-1α, and G6Pase activity. Insulin resistance was estimated using the HOMA-IR equation. RESULTS Body weight and blood glucose on days 7 and 14 increased in groups II and III compared to control. Hepatic PGC-1α and G6Pase increased in group II (2.33 ± 0.31; 2.07 ± 0.22) and III (2.31 ± 0.20; 0.98 ± 0.23) compared to control (1.73 ± 0.21; 0.47 ± 0.11). Hepatic glycogen was 71.8 and 82.4% reduced in groups II and III compared to control. Insulin in group II increased (63.6%) whiles group III values reduced (27.3%) compared to control. Insulin resistance increased in group II (0.29 ± 0.09) compared to control (0.12 ± 0.03) and group III (0.11 ± 0.03), respectively. CONCLUSIONS Exposure to 2 h green and white LAN in the early dark phase increases hepatic glycogenolysis and gluconeogenetic activities resulting in increased blood glucose. In male Wistar rats, exposure to green but not white LAN may predispose to insulin resistance.
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Affiliation(s)
- Abayomi O Ige
- Applied and Environmental Physiology Unit, Department of Physiology, University of Ibadan, Ibadan, Nigeria
| | - Olubori S Adekanye
- Applied and Environmental Physiology Unit, Department of Physiology, University of Ibadan, Ibadan, Nigeria
| | - Elsie O Adewoye
- Applied and Environmental Physiology Unit, Department of Physiology, University of Ibadan, Ibadan, Nigeria
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Machrina Y, Lindarto D, Pane YS, Harahap NS. The Pattern of Peroxisome Proliferator-activated Receptor Gamma Coactivator 1-alpha Gene Expression in Type-2 Diabetes Mellitus Rat Model Liver: Focus on Exercise. Open Access Maced J Med Sci 2021. [DOI: 10.3889/oamjms.2021.6362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) has an important role in mitochondria biogenesis which generated cellular metabolism. Carbohydrate metabolism in the liver is crucial to maintain plasma blood glucose.
AIM: This research aimed to determine the expression of PGC-1α gene in the liver type-2 diabetes mellitus (T2DM) rat model, after treatment with a focus on exercise.
METHODS: We used 25 healthy male Wistar rats as subjects. Rats were modified to T2DM models by feeding a high-fat diet and low-dose streptozotocin injection. We divided the rats into five groups, that is, sedentary group as a control and four others as treatment groups. The exercise was assigned for treatment groups by a run on the treadmill as moderate intensity continuous (MIC), highintensity continuous (HIC), slow interval (SI), and fast interval (FI). The treatment groups were exercise throughout 8 weeks with a frequency of 3 times a week.
RESULTS: The results showed that expression of PGC-1α gene was lower in all treatment groups compared to controls (p < 0.05). Expression in HIC was higher than MIC (p < 0.05), so was the expression in FI more than SI (p < 0.05).
CONCLUSIONS: Exercise affected PGC-1α gene expression in the liver of the T2DM rat model. The expression of PGC-1α was linear with exercise intensity.
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Golson ML. Islet Epigenetic Impacts on β-Cell Identity and Function. Compr Physiol 2021; 11:1961-1978. [PMID: 34061978 DOI: 10.1002/cphy.c200004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The development and maintenance of differentiation is vital to the function of mature cells. Terminal differentiation is achieved by locking in the expression of genes essential for the function of those cells. Gene expression and its memory through generations of cell division is controlled by transcription factors and a host of epigenetic marks. In type 2 diabetes, β cells have altered gene expression compared to controls, accompanied by altered chromatin marks. Mutations, diet, and environment can all disrupt the implementation and preservation of the distinctive β-cell transcriptional signature. Understanding of the full complement of genomic control in β cells is still nascent. This article describes the known effects of histone marks and variants, DNA methylation, how they are regulated in the β cell, and how they affect cell-fate specification, maintenance, and lineage propagation. © 2021 American Physiological Society. Compr Physiol 11:1-18, 2021.
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Affiliation(s)
- Maria L Golson
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
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48
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Huang JQ, Lu M, Ho CT. Health benefits of dietary chronobiotics: beyond resynchronizing internal clocks. Food Funct 2021; 12:6136-6156. [PMID: 34057166 DOI: 10.1039/d1fo00661d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The internal circadian clock in mammals drives whole-body biological activity rhythms. The clock reflects changes in external signals by controlling enzyme functions and the release of hormones involved in metabolic processes. Thus, misalignments between the circadian clock and an individual's daily schedule are recognized to be related to various metabolic diseases, such as obesity and diabetes. Although evidence has shown the existence of a complex relationship between circadian clock regulation and daily food intake, the regulatory effects of phytochemicals on the circadian clock remain unclarified. To better elucidate these relationships/effects, the circadian system components in mammals, circadian misalignment-related metabolic diseases, circadian rhythm-adjusting phytochemicals (including the heterocycles, acids, flavonoids and others) and the potential mechanisms (including the regulation of clock genes/proteins, metabolites of gut microbiota and secondary metabolites) are reviewed here. The bioactive components of functional foods discussed in this review could be considered potentially effective factors for the prevention and treatment of metabolic disorders related to circadian misalignment.
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Affiliation(s)
- Jun-Qing Huang
- Guangzhou Key Laboratory of Formula-pattern of Traditional Chinese Medicine, Formula-pattern Research Center, School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, China.
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Wu M, Zhang C, Xie M, Zhen Y, Lai B, Liu J, Qiao L, Liu S, Shi D. Compartmentally scavenging hepatic oxidants through AMPK/SIRT3-PGC1α axis improves mitochondrial biogenesis and glucose catabolism. Free Radic Biol Med 2021; 168:117-128. [PMID: 33794310 DOI: 10.1016/j.freeradbiomed.2021.03.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 03/16/2021] [Accepted: 03/24/2021] [Indexed: 01/27/2023]
Abstract
Early treatment can prevent the occurrence of diabetes; however, there are few pharmacological treatment strategies to date. The liver is a major metabolic organ, and hepatic glucose homeostasis is dysregulated in type 1 and type 2 diabetes mellitus. However, the potential of specifically targeting the liver to prevent diabetes has not been fully exploited. In this study, we found that compartmentally inhibiting hepatic oxidants by nano-MitoPBN, a liver mitochondrial-targeting ROS scavenger, could effectively prevent diabetes. Our results demonstrated that nano-MitoPBN reversed the downregulation of PGC-1α and the enhanced gluconeogenesis in the livers of diabetic mice. PGC-1α, through an AMPK- and SIRT3-mediated mechanism, promoted mitochondrial biogenesis, increased the number of mitochondria, and enhanced the rate of aerobic oxidation, leading to decreased glucose levels in the blood by increasing glucose uptake and catabolism in the liver. Moreover, the increase in PGC-1α activity did not promote the activation of gluconeogenesis. Our study demonstrated that by regulating the redox balance of liver mitochondria in the early stage of diabetes, PGC-1α could selectively inhibit gluconeogenesis in the liver and promote hepatic mitochondrial function, which accelerated the catabolism of hepatic glucose and reduced blood glucose. Thus, glucose tolerance can be normalized through only three weeks of intervention. Our results showed that nano-MitoPBN could effectively prevent diabetes in a short period of time, highlighting the effectiveness and importance of early intervention for diabetes and suggesting the potential advantages of hepatic mitochondrial targeting oxidants nano-inhibitors in the prevention and early treatment of diabetes.
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Affiliation(s)
- Meiling Wu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Chunwang Zhang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Mengdan Xie
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Yuansheng Zhen
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, People's Republic of China
| | - Ben Lai
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Jiankang Liu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Liang Qiao
- Department of Chemistry, Fudan University, Shanghai, 200433, People's Republic of China
| | - Shanlin Liu
- Free Radical Regulation and Application Research Center of Fudan University, Shanghai, 200032, People's Republic of China.
| | - Dongyun Shi
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China.
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50
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Li G, Tan X, Zhang B, Guan L, Zhang Y, Yin L, Gao M, Zhu S, Xu L. Hengshun Aromatic Vinegar Improves Glycolipid Metabolism in Type 2 Diabetes Mellitus via Regulating PGC-1α/PGC-1β Pathway. Front Pharmacol 2021; 12:641829. [PMID: 33981226 PMCID: PMC8109051 DOI: 10.3389/fphar.2021.641829] [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: 12/15/2020] [Accepted: 04/12/2021] [Indexed: 12/31/2022] Open
Abstract
Hengshun aromatic vinegar (HSAV), produced by typical solid-state or liquid-state fermentation techniques, is consumed worldwide as a food condiment. HSAV shows multiple bioactivities, but its activity in type 2 diabetes mellitus (T2DM) and possible mechanisms have not been reported. In this study, the effects of HSAV against T2DM were evaluated in insulin-induced HepG2 cells and high-fat diet (HFD) and streptozotocin (STZ) induced T2DM rats. Then, the mechanisms of HSAV against T2DM were explored by Real-time PCR, Western blot, immunofluorescence assays, siRNA transfection and gene overexpression experiments. Results indicated that HSAV significantly improved glucose consumption and reduced triglycerides (TG) contents in metabolic disordered HepG2 cells. Meanwhile, HSAV obviously alleviated general status, liver and kidney functions of T2DM rats, and decreased hyperglycemia and hyperlipidemia, improved insulin resistance, and reduced lipid accumulation in liver. Mechanism studies indicated that HSAV markedly down-regulated the expression of proliferator-activated receptor γ coactivator-1α (PGC-1α), then regulated peroxisome proliferators-activated receptor α (PPAR-α)/protein kinase B (AKT) signal pathway mediated gluconeogenesis and glycogen synthesis. Meanwhile, HSAV significantly up-regulated proliferator-activated receptor γ coactivator-1β (PGC-1β), and subsequently decreased sterol regulatory element binding protein-1c (SREBP-1c) pathway mediated lipogenesis. In conclusion, HSAV showed potent anti-T2DM activity in ameliorating dysfunction of glycolipid metabolism through regulating PGC-1α/PGC-1β pathway, which has a certain application prospect as an effective diet supplement for T2DM therapy in the future.
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Affiliation(s)
- Guoquan Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China.,Jiangsu Hengshun Vinegar Industry Co., Ltd., Zhenjiang, China
| | - Xuemei Tan
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Bao Zhang
- Jiangsu Hengshun Vinegar Industry Co., Ltd., Zhenjiang, China
| | - Linshu Guan
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Yidan Zhang
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Lianhong Yin
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Meng Gao
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Shenghu Zhu
- Jiangsu Hengshun Vinegar Industry Co., Ltd., Zhenjiang, China
| | - Lina Xu
- College of Pharmacy, Dalian Medical University, Dalian, China
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