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Harold KM, Matsuzaki S, Pranay A, Loveland BL, Batushansky A, Mendez Garcia MF, Eyster C, Stavrakis S, Chiao YA, Kinter M, Humphries KM. Loss of Cardiac PFKFB2 Drives Metabolic, Functional, and Electrophysiological Remodeling in the Heart. J Am Heart Assoc 2024; 13:e033676. [PMID: 38533937 PMCID: PMC11179765 DOI: 10.1161/jaha.123.033676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/20/2024] [Indexed: 03/28/2024]
Abstract
BACKGROUND Phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFK-2) is a critical glycolytic regulator responsible for upregulation of glycolysis in response to insulin and adrenergic signaling. PFKFB2, the cardiac isoform of PFK-2, is degraded in the heart in the absence of insulin signaling, contributing to diabetes-induced cardiac metabolic inflexibility. However, previous studies have not examined how the loss of PFKFB2 affects global cardiac metabolism and function. METHODS AND RESULTS To address this, we have generated a mouse model with a cardiomyocyte-specific knockout of PFKFB2 (cKO). Using 9-month-old cKO and control mice, we characterized the impacts of PFKFB2 on cardiac metabolism, function, and electrophysiology. cKO mice have a shortened life span of 9 months. Metabolically, cKO mice are characterized by increased glycolytic enzyme abundance and pyruvate dehydrogenase activity, as well as decreased mitochondrial abundance and beta oxidation, suggesting a shift toward glucose metabolism. This was supported by a decrease in the ratio of palmitoyl carnitine to pyruvate-dependent mitochondrial respiration in cKO relative to control animals. Metabolomic, proteomic, and Western blot data support the activation of ancillary glucose metabolism, including pentose phosphate and hexosamine biosynthesis pathways. Physiologically, cKO animals exhibited impaired systolic function and left ventricular dilation, represented by reduced fractional shortening and increased left ventricular internal diameter, respectively. This was accompanied by electrophysiological alterations including increased QT interval and other metrics of delayed ventricular conduction. CONCLUSIONS Loss of PFKFB2 results in metabolic remodeling marked by cardiac ancillary pathway activation. This could delineate an underpinning of pathologic changes to mechanical and electrical function in the heart.
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Affiliation(s)
- Kylene M. Harold
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
- Department of Biochemistry and Molecular PhysiologyUniversity of Oklahoma Health Sciences CenterOklahoma CityOKUSA
| | - Satoshi Matsuzaki
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
| | - Atul Pranay
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
| | - Brooke L. Loveland
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
| | - Albert Batushansky
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
- Ilse Katz Institute for Nanoscale Science & TechnologyBen‐Gurion University of the NegevBeer ShevaIsrael
| | - Maria F. Mendez Garcia
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
| | - Craig Eyster
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
| | - Stavros Stavrakis
- Department of Medicine, Section of Cardiovascular MedicineUniversity of Oklahoma Health Sciences CenterOklahoma CityOKUSA
| | - Ying Ann Chiao
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
- Department of Biochemistry and Molecular PhysiologyUniversity of Oklahoma Health Sciences CenterOklahoma CityOKUSA
| | - Michael Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
| | - Kenneth M. Humphries
- Aging and Metabolism Research Program, Oklahoma Medical Research FoundationOklahoma CityOKUSA
- Department of Biochemistry and Molecular PhysiologyUniversity of Oklahoma Health Sciences CenterOklahoma CityOKUSA
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Wang Y, Li F, Mao L, Liu Y, Chen S, Liu J, Huang K, Chen Q, Wu J, Lu L, Zheng Y, Shen W, Ying T, Dai Y, Shen Y. Promoting collateral formation in type 2 diabetes mellitus using ultra-small nanodots with autophagy activation and ROS scavenging. J Nanobiotechnology 2024; 22:85. [PMID: 38429826 PMCID: PMC10908163 DOI: 10.1186/s12951-024-02357-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 02/20/2024] [Indexed: 03/03/2024] Open
Abstract
BACKGROUND Impaired collateral formation is a major factor contributing to poor prognosis in type 2 diabetes mellitus (T2DM) patients with atherosclerotic cardiovascular disease. However, the current pharmacological treatments for improving collateral formation remain unsatisfactory. The induction of endothelial autophagy and the elimination of reactive oxygen species (ROS) represent potential therapeutic targets for enhancing endothelial angiogenesis and facilitating collateral formation. This study investigates the potential of molybdenum disulfide nanodots (MoS2 NDs) for enhancing collateral formation and improving prognosis. RESULTS Our study shows that MoS2 NDs significantly enhance collateral formation in ischemic tissues of diabetic mice, improving effective blood resupply. Additionally, MoS2 NDs boost the proliferation, migration, and tube formation of endothelial cells under high glucose/hypoxia conditions in vitro. Mechanistically, the beneficial effects of MoS2 NDs on collateral formation not only depend on their known scavenging properties of ROS (H2O2, •O2-, and •OH) but also primarily involve a molecular pathway, cAMP/PKA-NR4A2, which promotes autophagy and contributes to mitigating damage in diabetic endothelial cells. CONCLUSIONS Overall, this study investigated the specific mechanism by which MoS2 NDs mediated autophagy activation and highlighted the synergy between autophagy activation and antioxidation, thus suggesting that an economic and biocompatible nano-agent with dual therapeutic functions is highly preferable for promoting collateral formation in a diabetic context, thus, highlighting their therapeutic potential.
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Affiliation(s)
- Yixuan Wang
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Feifei Li
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Linshuang Mao
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Yu Liu
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, School of Medicine and Engineering, Beihang University, Beijing, 100191, China
| | - Shuai Chen
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Jingmeng Liu
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Ke Huang
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Qiujing Chen
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Jianrong Wu
- Department of Ultrasound in Medicine, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Lin Lu
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Yuanyi Zheng
- Department of Ultrasound in Medicine, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Weifeng Shen
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China
| | - Tao Ying
- Department of Ultrasound in Medicine, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China.
| | - Yang Dai
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China.
| | - Ying Shen
- Department of Cardiovascular Medicine, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
- Shanghai Clinical Research Center for Interventional Medicine, Shanghai, 200025, China.
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3
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Harold KM, Matsuzaki S, Pranay A, Loveland BL, Batushansky A, Mendez Garcia MF, Eyster C, Stavrakis S, Chiao YA, Kinter M, Humphries KM. Loss of cardiac PFKFB2 drives Metabolic, Functional, and Electrophysiological Remodeling in the Heart. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.22.568379. [PMID: 38045353 PMCID: PMC10690253 DOI: 10.1101/2023.11.22.568379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Background Phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFK-2) is a critical glycolytic regulator responsible for upregulation of glycolysis in response to insulin and adrenergic signaling. PFKFB2, the cardiac isoform of PFK-2, is degraded in the heart in the absence of insulin signaling, contributing to diabetes-induced cardiac metabolic inflexibility. However, previous studies have not examined how the loss of PFKFB2 affects global cardiac metabolism and function. Methods To address this, we have generated a mouse model with a cardiomyocyte-specific knockout of PFKFB2 (cKO). Using 9-month-old cKO and control (CON) mice, we characterized impacts of PFKFB2 on cardiac metabolism, function, and electrophysiology. Results cKO mice have a shortened lifespan of 9 months. Metabolically, cKO mice are characterized by increased glycolytic enzyme abundance and pyruvate dehydrogenase (PDH) activity, as well as decreased mitochondrial abundance and beta oxidation, suggesting a shift toward glucose metabolism. This was supported by a decrease in the ratio of palmitoyl carnitine to pyruvate-dependent mitochondrial respiration in cKO relative to CON animals. Metabolomic, proteomic, and western blot data support the activation of ancillary glucose metabolism, including pentose phosphate and hexosamine biosynthesis pathways. Physiologically, cKO animals exhibited impaired systolic function and left ventricular (LV) dilation, represented by reduced fractional shortening and increased LV internal diameter, respectively. This was accompanied by electrophysiological alterations including increased QT interval and other metrics of delayed ventricular conduction. Conclusions Loss of PFKFB2 results in metabolic remodeling marked by cardiac ancillary pathway activation. This could delineate an underpinning of pathologic changes to mechanical and electrical function in the heart. Clinical Perspective What is New?: We have generated a novel cardiomyocyte-specific knockout model of PFKFB2, the cardiac isoform of the primary glycolytic regulator Phosphofructokinase-2 (cKO).The cKO model demonstrates that loss of cardiac PFKFB2 drives metabolic reprogramming and shunting of glucose metabolites to ancillary metabolic pathways.The loss of cardiac PFKFB2 promotes electrophysiological and functional remodeling in the cKO heart.What are the Clinical Implications?: PFKFB2 is degraded in the absence of insulin signaling, making its loss particularly relevant to diabetes and the pathophysiology of diabetic cardiomyopathy.Changes which we observe in the cKO model are consistent with those often observed in diabetes and heart failure of other etiologies.Defining PFKFB2 loss as a driver of cardiac pathogenesis identifies it as a target for future investigation and potential therapeutic intervention.
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Arumugam TV, Alli-Shaik A, Liehn EA, Selvaraji S, Poh L, Rajeev V, Cho Y, Cho Y, Kim J, Kim J, Swa HLF, Hao DTZ, Rattanasopa C, Fann DYW, Mayan DC, Ng GYQ, Baik SH, Mallilankaraman K, Gelderblom M, Drummond GR, Sobey CG, Kennedy BK, Singaraja RR, Mattson MP, Jo DG, Gunaratne J. Multiomics analyses reveal dynamic bioenergetic pathways and functional remodeling of the heart during intermittent fasting. eLife 2023; 12:RP89214. [PMID: 37769126 PMCID: PMC10538958 DOI: 10.7554/elife.89214] [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] [Indexed: 09/30/2023] Open
Abstract
Intermittent fasting (IF) has been shown to reduce cardiovascular risk factors in both animals and humans, and can protect the heart against ischemic injury in models of myocardial infarction. However, the underlying molecular mechanisms behind these effects remain unclear. To shed light on the molecular and cellular adaptations of the heart to IF, we conducted comprehensive system-wide analyses of the proteome, phosphoproteome, and transcriptome, followed by functional analysis. Using advanced mass spectrometry, we profiled the proteome and phosphoproteome of heart tissues obtained from mice that were maintained on daily 12- or 16 hr fasting, every-other-day fasting, or ad libitum control feeding regimens for 6 months. We also performed RNA sequencing to evaluate whether the observed molecular responses to IF occur at the transcriptional or post-transcriptional levels. Our analyses revealed that IF significantly affected pathways that regulate cyclic GMP signaling, lipid and amino acid metabolism, cell adhesion, cell death, and inflammation. Furthermore, we found that the impact of IF on different metabolic processes varied depending on the length of the fasting regimen. Short IF regimens showed a higher correlation of pathway alteration, while longer IF regimens had an inverse correlation of metabolic processes such as fatty acid oxidation and immune processes. Additionally, functional echocardiographic analyses demonstrated that IF enhances stress-induced cardiac performance. Our systematic multi-omics study provides a molecular framework for understanding how IF impacts the heart's function and its vulnerability to injury and disease.
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Affiliation(s)
- Thiruma V Arumugam
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe UniversityMelbourneAustralia
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Asfa Alli-Shaik
- Translational Biomedical Proteomics Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and ResearchSingaporeSingapore
| | - Elisa A Liehn
- National Heart Research Institute, National Heart Centre SingaporeSingaporeSingapore
- Institute for Molecular Medicine, University of Southern DenmarkOdenseDenmark
- National Institute of Pathology "Victor Babes"BucharestRomania
| | - Sharmelee Selvaraji
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of SingaporeSingaporeSingapore
| | - Luting Poh
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Vismitha Rajeev
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Yoonsuk Cho
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Yongeun Cho
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Jongho Kim
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Joonki Kim
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
- Natural Products Research Center, Korea Institute of Science and TechnologyGangneungRepublic of Korea
| | - Hannah LF Swa
- Translational Biomedical Proteomics Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and ResearchSingaporeSingapore
| | - David Tan Zhi Hao
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Chutima Rattanasopa
- Translational Laboratories in Genetic Medicine, Agency for Science, Technology and ResearchSingaporeSingapore
- Cardiovascular and Metabolic Disorders Program, Duke-National University of SingaporeSingaporeSingapore
| | - David Yang-Wei Fann
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - David Castano Mayan
- Translational Laboratories in Genetic Medicine, Agency for Science, Technology and ResearchSingaporeSingapore
| | - Gavin Yong-Quan Ng
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Sang-Ha Baik
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Karthik Mallilankaraman
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Mathias Gelderblom
- Department of Neurology, University Medical Center Hamburg-EppendorfHamburgGermany
| | - Grant R Drummond
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe UniversityMelbourneAustralia
| | - Christopher G Sobey
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe UniversityMelbourneAustralia
| | - Brian K Kennedy
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
- Department of Biochemistry, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Roshni R Singaraja
- Department of Medicine, Yong Loo Lin School of Medicine, National University of SingaporeSingaporeSingapore
| | - Mark P Mattson
- Department of Neuroscience, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Jayantha Gunaratne
- Translational Biomedical Proteomics Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and ResearchSingaporeSingapore
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of SingaporeSingaporeSingapore
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5
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Mendez Garcia MF, Matsuzaki S, Batushansky A, Newhardt R, Kinter C, Jin Y, Mann SN, Stout MB, Gu H, Chiao YA, Kinter M, Humphries KM. Increased cardiac PFK-2 protects against high-fat diet-induced cardiomyopathy and mediates beneficial systemic metabolic effects. iScience 2023; 26:107131. [PMID: 37534142 PMCID: PMC10391959 DOI: 10.1016/j.isci.2023.107131] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 04/27/2023] [Accepted: 06/10/2023] [Indexed: 08/04/2023] Open
Abstract
A healthy heart adapts to changes in nutrient availability and energy demands. In metabolic diseases like type 2 diabetes (T2D), increased reliance on fatty acids for energy production contributes to mitochondrial dysfunction and cardiomyopathy. A principal regulator of cardiac metabolism is 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFK-2), which is a central driver of glycolysis. We hypothesized that increasing PFK-2 activity could mitigate cardiac dysfunction induced by high-fat diet (HFD). Wild type (WT) and cardiac-specific transgenic mice expressing PFK-2 (GlycoHi) were fed a low fat or HFD for 16 weeks to induce metabolic dysfunction. Metabolic phenotypes were determined by measuring mitochondrial bioenergetics and performing targeted quantitative proteomic and metabolomic analysis. Increasing cardiac PFK-2 had beneficial effects on cardiac and mitochondrial function. Unexpectedly, GlycoHi mice also exhibited sex-dependent systemic protection from HFD, including increased glucose homeostasis. These findings support improving glycolysis via PFK-2 activity can mitigate mitochondrial and functional changes that occur with metabolic syndrome.
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Affiliation(s)
- Maria F. Mendez Garcia
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Satoshi Matsuzaki
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Albert Batushansky
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ryan Newhardt
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Caroline Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Yan Jin
- Center for Translational Science, Florida International University, Port St. Lucie, FL, USA
| | - Shivani N. Mann
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Michael B. Stout
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Haiwei Gu
- Center for Translational Science, Florida International University, Port St. Lucie, FL, USA
| | - Ying Ann Chiao
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Michael Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Kenneth M. Humphries
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
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Li P, Newhardt MF, Matsuzaki S, Eyster C, Pranay A, Peelor FF, Batushansky A, Kinter C, Subramani K, Subrahmanian S, Ahamed J, Yu P, Kinter M, Miller BF, Humphries KM. The loss of cardiac SIRT3 decreases metabolic flexibility and proteostasis in an age-dependent manner. GeroScience 2023; 45:983-999. [PMID: 36460774 PMCID: PMC9886736 DOI: 10.1007/s11357-022-00695-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/17/2022] [Indexed: 12/04/2022] Open
Abstract
SIRT3 is a longevity factor that acts as the primary deacetylase in mitochondria. Although ubiquitously expressed, previous global SIRT3 knockout studies have shown primarily a cardiac-specific phenotype. Here, we sought to determine how specifically knocking out SIRT3 in cardiomyocytes (SIRTcKO mice) temporally affects cardiac function and metabolism. Mice displayed an age-dependent increase in cardiac pathology, with 10-month-old mice exhibiting significant loss of systolic function, hypertrophy, and fibrosis. While mitochondrial function was maintained at 10 months, proteomics and metabolic phenotyping indicated SIRT3 hearts had increased reliance on glucose as an energy substrate. Additionally, there was a significant increase in branched-chain amino acids in SIRT3cKO hearts without concurrent increases in mTOR activity. Heavy water labeling experiments demonstrated that, by 3 months of age, there was an increase in protein synthesis that promoted hypertrophic growth with a potential loss of proteostasis in SIRT3cKO hearts. Cumulatively, these data show that the cardiomyocyte-specific loss of SIRT3 results in severe pathology with an accelerated aging phenotype.
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Affiliation(s)
- Ping Li
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
- Department of Cardiology, Central South University, The Third Xiangya Hospital, Changsha, Hunan, China
| | - Maria F Newhardt
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA.
| | - Satoshi Matsuzaki
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Craig Eyster
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Atul Pranay
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Frederick F Peelor
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Albert Batushansky
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Caroline Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Kumar Subramani
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Sandeep Subrahmanian
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Jasimuddin Ahamed
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Pengchun Yu
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Michael Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Benjamin F Miller
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Kenneth M Humphries
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA.
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
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Chaoul V, Hanna R, Hachem P, El Hayek MS, Nour‐Eldine W, Abou‐Khalil P, Abi‐Ramia E, Vandecasteele G, Abi‐Gerges A. Differential changes in cyclic adenosine 3′‐5′ monophosphate (
cAMP
) effectors and major Ca
2+
handling proteins during diabetic cardiomyopathy. J Cell Mol Med 2023; 27:1277-1289. [PMID: 36967707 PMCID: PMC10148055 DOI: 10.1111/jcmm.17733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 02/23/2023] [Accepted: 03/14/2023] [Indexed: 03/29/2023] Open
Abstract
Diabetic cardiomyopathy (DCM) is associated with differential and time-specific regulation of β-adrenergic receptors and cardiac cyclic nucleotide phosphodiesterases with consequences for total cyclic adenosine 3'-5' monophosphate (cAMP) levels. We aimed to investigate whether these changes are associated with downstream impairments in cAMP and Ca2+ signalling in a type 1 diabetes (T1D)-induced DCM model. T1D was induced in adult male rats by streptozotocin (65 mg/kg) injection. DCM was assessed by cardiac structural and molecular remodelling. We delineated sequential changes affecting the exchange protein (Epac1/2), cAMP-dependent protein kinase A (PKA) and Ca2+ /Calmodulin-dependent kinase II (CaMKII) at 4, 8 and 12 weeks following diabetes, by real-time quantitative PCR and western blot. Expression of Ca2+ ATPase pump (SERCA2a), phospholamban (PLB) and Troponin I (TnI) was also examined. Early upregulation of Epac1 transcripts was noted in diabetic hearts at Week 4, followed by increases in Epac2 mRNA, but not protein levels, at Week 12. Expression of PKA subunits (RI, RIIα and Cα) remained unchanged regardless of the disease stage, whereas CaMKII increased at Week 12 in DCM. Moreover, PLB transcripts were upregulated in diabetic hearts, whereas SERCA2a and TnI gene expression was unchanged irrespective of the disease evolution. PLB phosphorylation at threonine-17 was increased in DCM, whereas phosphorylation of both PLB at serine-16 and TnI at serine-23/24 was unchanged. We show for the first time differential and time-specific regulations in cardiac cAMP effectors and Ca2+ handling proteins, data that may prove useful in proposing new therapeutic approaches in T1D-induced DCM.
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Affiliation(s)
- Victoria Chaoul
- Gilbert and Rose‐Marie Chagoury School of MedicineLebanese American UniversityP.O. Box 36ByblosLebanon
| | - Rita Hanna
- Gilbert and Rose‐Marie Chagoury School of MedicineLebanese American UniversityP.O. Box 36ByblosLebanon
| | - Pia Hachem
- Gilbert and Rose‐Marie Chagoury School of MedicineLebanese American UniversityP.O. Box 36ByblosLebanon
| | - Magali Samia El Hayek
- Signaling and Cardiovascular Pathophysiology, UMR‐S1180Université Paris‐SaclayOrsay91400France
| | - Wared Nour‐Eldine
- Gilbert and Rose‐Marie Chagoury School of MedicineLebanese American UniversityP.O. Box 36ByblosLebanon
| | - Pamela Abou‐Khalil
- Gilbert and Rose‐Marie Chagoury School of MedicineLebanese American UniversityP.O. Box 36ByblosLebanon
| | - Elias Abi‐Ramia
- School of Arts and Sciences, Department of Natural SciencesLebanese American UniversityByblosLebanon
| | - Grégoire Vandecasteele
- Signaling and Cardiovascular Pathophysiology, UMR‐S1180Université Paris‐SaclayOrsay91400France
| | - Aniella Abi‐Gerges
- Gilbert and Rose‐Marie Chagoury School of MedicineLebanese American UniversityP.O. Box 36ByblosLebanon
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8
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Sarco/endoplasmic reticulum calcium ATPase activity is unchanged despite increased myofilament calcium sensitivity in Zucker type 2 diabetic fatty rat heart. Sci Rep 2022; 12:16904. [PMID: 36207382 PMCID: PMC9546843 DOI: 10.1038/s41598-022-20520-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 09/14/2022] [Indexed: 11/11/2022] Open
Abstract
Systolic and diastolic dysfunction in diabetes have frequently been associated with abnormal calcium (Ca2+) regulation. However, there is emerging evidence that Ca2+ mishandling alone is insufficient to fully explain diabetic heart dysfunction, with focus shifting to the properties of the myofilament proteins. Our aim was to examine the effects of diabetes on myofilament Ca2+ sensitivity and Ca2+ handling in left ventricular tissues isolated from the same type 2 diabetic rat hearts. We measured the force-pCa relationship in skinned left ventricular cardiomyocytes isolated from 20-week-old type 2 diabetic and non-diabetic rats. Myofilament Ca2+ sensitivity was greater in the diabetic relative to non-diabetic cardiomyocytes, and this corresponded with lower phosphorylation of cardiac troponin I (cTnI) at ser23/24 in the diabetic left ventricular tissues. Protein expression of sarco/endoplasmic reticulum Ca2+-ATPase (SERCA), phosphorylation of phospholamban (PLB) at Ser16, and SERCA/PLB ratio were lower in the diabetic left ventricular tissues. However, the maximum SERCA Ca2+ uptake rate was not different between the diabetic and non-diabetic myocardium. Our data suggest that impaired contractility in the diabetic heart is not caused by SERCA Ca2+ mishandling. This study highlights the important role of the cardiac myofilament and provides new insight on the pathophysiology of diabetic heart dysfunction.
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9
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Francisco AB, Kanke M, Massa AP, Dinh TA, Sritharan R, Vakili K, Bardeesy N, Sethupathy P. Multi-omic analysis of microRNA-mediated regulation reveals a proliferative axis involving miR-10b in fibrolamellar carcinoma. JCI Insight 2022; 7:154743. [PMID: 35482409 PMCID: PMC9220943 DOI: 10.1172/jci.insight.154743] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 04/26/2022] [Indexed: 12/03/2022] Open
Abstract
Fibrolamellar carcinoma (FLC) is an aggressive liver cancer primarily afflicting adolescents and young adults. Most patients with FLC harbor a heterozygous deletion on chromosome 19 that leads to the oncogenic gene fusion, DNAJB1-PRKACA. There are currently no effective therapeutics for FLC. To address that, it is critical to gain deeper mechanistic insight into FLC pathogenesis. We assembled a large sample set of FLC and nonmalignant liver tissue (n = 52) and performed integrative multiomic analysis. Specifically, we carried out small RNA sequencing to define altered microRNA expression patterns in tumor samples and then coupled this analysis with RNA sequencing and chromatin run-on sequencing data to identify candidate master microRNA regulators of gene expression in FLC. We also evaluated the relationship between DNAJB1-PRKACA and microRNAs of interest in several human and mouse cell models. Finally, we performed loss-of-function experiments for a specific microRNA in cells established from a patient-derived xenograft (PDX) model. We identified miR-10b-5p as the top candidate pro-proliferative microRNA in FLC. In multiple human cell models, overexpression of DNAJB1-PRKACA led to significant upregulation of miR-10b-5p. Inhibition of miR-10b in PDX-derived cells increased the expression of several potentially novel target genes, concomitant with a significant reduction in metabolic activity, proliferation, and anchorage-independent growth. This study highlights a potentially novel proliferative axis in FLC and provides a rich resource for further investigation of FLC etiology.
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Affiliation(s)
- Adam B Francisco
- Department of Biomedical Sciences, Cornell University, Ithaca, United States of America
| | - Matt Kanke
- Department of Biomedical Sciences, Cornell University, Ithaca, United States of America
| | - Andrew P Massa
- Department of Biomedical Sciences, Cornell University, Ithaca, United States of America
| | - Timothy A Dinh
- Department of Biomedical Sciences, Cornell University, Ithaca, United States of America
| | - Ramja Sritharan
- Department of Biomedical Sciences, Cornell University, Ithaca, United States of America
| | - Khashayar Vakili
- Department of Surgery, Boston Children's Hospital, Boston, United States of America
| | - Nabeel Bardeesy
- Department of Medicine, Harvard Medical School, Boston, United States of America
| | - Praveen Sethupathy
- Department of Biomedical Sciences, Cornell University, Ithaca, United States of America
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10
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Shao-Mei W, Li-Fang Y, Li-Hong W. Traditional Chinese medicine enhances myocardial metabolism during heart failure. Biomed Pharmacother 2021; 146:112538. [PMID: 34922111 DOI: 10.1016/j.biopha.2021.112538] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 11/02/2022] Open
Abstract
The prognosis of various cardiovascular diseases eventually leads to heart failure (HF). An energy metabolism disorder of cardiomyocytes is important in explaining the molecular basis of HF; this will aid global research regarding treatment options for HF from the perspective of myocardial metabolism. There are many drugs to improve myocardial metabolism for the treatment of HF, including angiotensin receptor blocker-neprilysin inhibitor (ARNi) and sodium glucose cotransporter 2 (SGLT-2) inhibitors. Although Western medicine has made considerable progress in HF therapy, the morbidity and mortality of the disease remain high. Therefore, HF has attracted attention from researchers worldwide. In recent years, the application of traditional Chinese medicine (TCM) in HF treatment has been gradually accepted, and many studies have investigated the mechanism whereby TCM improves myocardial metabolism; the TCMs studied include Danshen yin, Fufang Danshen dripping pill, and Shenmai injection. This enables the clinical application of TCM in the treatment of HF by improving myocardial metabolism. We systematically reviewed the efficacy of TCM for improving myocardial metabolism during HF as well as the pharmacological effects of active TCM ingredients on the cardiovascular system and the potential mechanisms underlying their ability to improve myocardial metabolism. The results indicate that TCM may serve as a complementary and alternative approach for the prevention of HF. However, further rigorously designed randomized controlled trials are warranted to assess the effect of TCM on long-term hard endpoints in patients with cardiovascular disease.
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Affiliation(s)
- Wang Shao-Mei
- Cardiovascular Medicine Department, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, 158 Shangtang Road, Hangzhou 310014, Zhejiang, China
| | - Ye Li-Fang
- Cardiovascular Medicine Department, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, 158 Shangtang Road, Hangzhou 310014, Zhejiang, China
| | - Wang Li-Hong
- Cardiovascular Medicine Department, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, 158 Shangtang Road, Hangzhou 310014, Zhejiang, China.
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11
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Gaitán-González P, Sánchez-Hernández R, Arias-Montaño JA, Rueda A. Tale of two kinases: Protein kinase A and Ca 2+/calmodulin-dependent protein kinase II in pre-diabetic cardiomyopathy. World J Diabetes 2021; 12:1704-1718. [PMID: 34754372 PMCID: PMC8554373 DOI: 10.4239/wjd.v12.i10.1704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 07/28/2021] [Accepted: 08/30/2021] [Indexed: 02/06/2023] Open
Abstract
Metabolic syndrome is a pre-diabetic state characterized by several biochemical and physiological alterations, including insulin resistance, visceral fat accumulation, and dyslipidemias, which increase the risk for developing cardiovascular disease. Metabolic syndrome is associated with augmented sympathetic tone, which could account for the etiology of pre-diabetic cardiomyopathy. This review summarizes the current knowledge of the pathophysiological consequences of enhanced and sustained β-adrenergic response in pre-diabetes, focusing on cardiac dysfunction reported in diet-induced experimental models of pre-diabetic cardiomyopathy. The research reviewed indicates that both protein kinase A and Ca2+/calmodulin-dependent protein kinase II play important roles in functional responses mediated by β1-adrenoceptors; therefore, alterations in the expression or function of these kinases can be deleterious. This review also outlines recent information on the role of protein kinase A and Ca2+/calmodulin-dependent protein kinase II in abnormal Ca2+ handling by cardiomyocytes from diet-induced models of pre-diabetic cardiomyopathy.
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Affiliation(s)
- Pamela Gaitán-González
- Department of Biochemistry, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico
| | - Rommel Sánchez-Hernández
- Department of Physiology, Biophysics and Neurosciences, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico
| | - José-Antonio Arias-Montaño
- Department of Physiology, Biophysics and Neurosciences, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico
| | - Angélica Rueda
- Department of Biochemistry, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico
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12
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Insulin signaling alters antioxidant capacity in the diabetic heart. Redox Biol 2021; 47:102140. [PMID: 34560411 PMCID: PMC8473541 DOI: 10.1016/j.redox.2021.102140] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 12/22/2022] Open
Abstract
Diabetic cardiomyopathy is associated with an increase in oxidative stress. However, antioxidant therapy has shown a limited capacity to mitigate disease pathology. The molecular mechanisms responsible for the modulation of reactive oxygen species (ROS) production and clearance must be better defined. The objective of this study was to determine how insulin affects superoxide radical (O2•–) levels. O2•– production was evaluated in adult cardiomyocytes isolated from control and Akita (type 1 diabetic) mice by spin-trapping electron paramagnetic resonance spectroscopy. We found that the basal rates of O2•– production were comparable in control and Akita cardiomyocytes. However, culturing cardiomyocytes without insulin resulted in a significant increase in O2•– production only in the Akita group. In contrast, O2•– production was unaffected by high glucose and/or fatty acid supplementation. The increase in O2•– was due in part to a decrease in superoxide dismutase (SOD) activity. The PI3K inhibitor, LY294002, decreased Akita SOD activity when insulin was present, indicating that the modulation of antioxidant activity is through insulin signaling. The effect of insulin on mitochondrial O2•– production was evaluated in Akita mice that underwent a 1-week treatment of insulin. Mitochondria isolated from insulin-treated Akita mice produced less O2•– than vehicle-treated diabetic mice. Quantitative proteomics was performed on whole heart homogenates to determine how insulin affects antioxidant protein expression. Of 29 antioxidant enzymes quantified, thioredoxin 1 was the only one that was significantly enhanced by insulin treatment. In vitro analysis of thioredoxin 1 revealed a previously undescribed capacity of the enzyme to directly scavenge O2•–. These findings demonstrate that insulin has a role in mitigating cardiac oxidative stress in diabetes via regulation of endogenous antioxidant activity. Insulin decreases ROS production in T1D Akita cardiomyocytes. Insulin signaling downstream of PI3K is required for this effect. Insulin increases the antioxidant capacity in the Akita heart. Trx1 is upregulated by insulin in the Akita heart in vivo.
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13
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Laudette M, Sainte-Marie Y, Cousin G, Bergonnier D, Belhabib I, Brun S, Formoso K, Laib L, Tortosa F, Bergoglio C, Marcheix B, Borén J, Lairez O, Fauconnier J, Lucas A, Mialet-Perez J, Moro C, Lezoualc'h F. Cyclic AMP-binding protein Epac1 acts as a metabolic sensor to promote cardiomyocyte lipotoxicity. Cell Death Dis 2021; 12:824. [PMID: 34471096 PMCID: PMC8410846 DOI: 10.1038/s41419-021-04113-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 07/28/2021] [Accepted: 08/16/2021] [Indexed: 01/21/2023]
Abstract
Cyclic adenosine monophosphate (cAMP) is a master regulator of mitochondrial metabolism but its precise mechanism of action yet remains unclear. Here, we found that a dietary saturated fatty acid (FA), palmitate increased intracellular cAMP synthesis through the palmitoylation of soluble adenylyl cyclase in cardiomyocytes. cAMP further induced exchange protein directly activated by cyclic AMP 1 (Epac1) activation, which was upregulated in the myocardium of obese patients. Epac1 enhanced the activity of a key enzyme regulating mitochondrial FA uptake, carnitine palmitoyltransferase 1. Consistently, pharmacological or genetic Epac1 inhibition prevented lipid overload, increased FA oxidation (FAO), and protected against mitochondrial dysfunction in cardiomyocytes. In addition, analysis of Epac1 phosphoproteome led us to identify two key mitochondrial enzymes of the the β-oxidation cycle as targets of Epac1, the long-chain FA acyl-CoA dehydrogenase (ACADL) and the 3-ketoacyl-CoA thiolase (3-KAT). Epac1 formed molecular complexes with the Ca2+/calmodulin-dependent protein kinase II (CaMKII), which phosphorylated ACADL and 3-KAT at specific amino acid residues to decrease lipid oxidation. The Epac1-CaMKII axis also interacted with the α subunit of ATP synthase, thereby further impairing mitochondrial energetics. Altogether, these findings indicate that Epac1 disrupts the balance between mitochondrial FA uptake and oxidation leading to lipid accumulation and mitochondrial dysfunction, and ultimately cardiomyocyte death.
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Affiliation(s)
- Marion Laudette
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
- Department of Molecular and Clinical Medicine, Wallenberg Laboratory, University of Gothenburg and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Yannis Sainte-Marie
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Grégoire Cousin
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse Rangueil, Toulouse, France
| | - Dorian Bergonnier
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Ismahane Belhabib
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Stéphanie Brun
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse Rangueil, Toulouse, France
| | - Karina Formoso
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Loubna Laib
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Florence Tortosa
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Camille Bergoglio
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Bertrand Marcheix
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse Rangueil, Toulouse, France
| | - Jan Borén
- Department of Molecular and Clinical Medicine, Wallenberg Laboratory, University of Gothenburg and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Olivier Lairez
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse Rangueil, Toulouse, France
| | - Jérémy Fauconnier
- PHYMEDEXP, Université de Montpellier, CNRS, INSERM, CHRU Montpellier, Montpellier, France
| | - Alexandre Lucas
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Jeanne Mialet-Perez
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Cédric Moro
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France
| | - Frank Lezoualc'h
- Institut des Maladies Métaboliques et Cardiovasculaires, Inserm, Université Paul Sabatier, UMR 1297-I2MC, Toulouse, France.
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14
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Hanna R, Nour-Eldine W, Saliba Y, Dagher-Hamalian C, Hachem P, Abou-Khalil P, Mika D, Varin A, El Hayek MS, Pereira L, Farès N, Vandecasteele G, Abi-Gerges A. Cardiac Phosphodiesterases Are Differentially Increased in Diabetic Cardiomyopathy. Life Sci 2021; 283:119857. [PMID: 34339715 DOI: 10.1016/j.lfs.2021.119857] [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: 05/05/2021] [Revised: 07/19/2021] [Accepted: 07/20/2021] [Indexed: 12/29/2022]
Abstract
AIM Diabetic cardiomyopathy (DCM) accomodates a spectrum of cardiac abnormalities. This study aims to investigate whether DCM is associated with changes in cyclic adenosine 3'-5' monophosphate (cAMP) signaling, particularly cyclic nucleotide phosphodiesterases (PDEs). MAIN METHODS Type 1 diabetes (T1D) was induced in rats by streptozotocin (STZ, 65 mg/kg) injection. Myocardial remodeling, structure and function were evaluated by histology and echocardiography, respectively. We delineated the sequential changes affecting cAMP signaling and characterized the expression pattern of the predominant cardiac PDE isoforms (PDE 1-5) and β-adrenergic (β-AR) receptors at 4, 8 and 12 weeks following diabetes induction, by real-time quantitative PCR and Western blot. cAMP levels were measured by immunoassays. KEY FINDINGS T1D-induced DCM was associated with cardiac remodeling, steatosis and fibrosis. Upregulation of β1-AR receptor transcripts was noted in diabetic hearts at 4 weeks along with an increase in cAMP levels and an upregulation in the ejection fraction and fraction shortening. However, β2-AR receptors expression remained unchanged regardless of the disease stage. Moreover, we noted an early and specific upregulation of cardiac PDE1A, PDE2A, PDE4B, PDE4D and PDE5A expression at week 4, followed by increases in PDE3A levels in diabetic hearts at week 8. However, DCM was not associated with changes in PDE4A gene expression irrespective of the disease stage. SIGNIFICANCE We show for the first time differential and time-specific regulations in cardiac PDEs, data that may prove useful in proposing new therapeutic approaches in T1D-induced DCM.
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Affiliation(s)
- Rita Hanna
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, P.O. Box 36, Byblos, Lebanon
| | - Wared Nour-Eldine
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, P.O. Box 36, Byblos, Lebanon
| | - Youakim Saliba
- Faculté de Médecine, Laboratoire de Recherche en Physiologie et Physiopathologie, LRPP, Pôle Technologie Santé, Université Saint Joseph, Beirut, Lebanon
| | - Carole Dagher-Hamalian
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, P.O. Box 36, Byblos, Lebanon
| | - Pia Hachem
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, P.O. Box 36, Byblos, Lebanon
| | - Pamela Abou-Khalil
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, P.O. Box 36, Byblos, Lebanon
| | - Delphine Mika
- Signaling and Cardiovascular Pathophysiology, UMR-S1180, Université Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Audrey Varin
- Signaling and Cardiovascular Pathophysiology, UMR-S1180, Université Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Magali Samia El Hayek
- Signaling and Cardiovascular Pathophysiology, UMR-S1180, Université Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Laëtitia Pereira
- Signaling and Cardiovascular Pathophysiology, UMR-S1180, Université Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Nassim Farès
- Faculté de Médecine, Laboratoire de Recherche en Physiologie et Physiopathologie, LRPP, Pôle Technologie Santé, Université Saint Joseph, Beirut, Lebanon
| | - Grégoire Vandecasteele
- Signaling and Cardiovascular Pathophysiology, UMR-S1180, Université Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Aniella Abi-Gerges
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, P.O. Box 36, Byblos, Lebanon.
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15
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Tian CJ, Zhang JH, Liu J, Ma Z, Zhen Z. Ryanodine receptor and immune-related molecules in diabetic cardiomyopathy. ESC Heart Fail 2021; 8:2637-2646. [PMID: 34013670 PMCID: PMC8318495 DOI: 10.1002/ehf2.13431] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 04/04/2021] [Accepted: 05/03/2021] [Indexed: 12/13/2022] Open
Abstract
Hyperglycaemia is a major aetiological factor in the development of diabetic cardiomyopathy. Excessive hyperglycaemia increases the levels of reactive carbonyl species (RCS), reactive oxygen species (ROS) and reactive nitrogen species (RNS) in the heart and causes derangements in calcium homeostasis, inflammation and immune‐system disorders. Ryanodine receptor 2 (RyR2) plays a key role in excitation–contraction coupling during heart contractions, including rhythmic contraction and relaxation of the heart. Cardiac inflammation has been indicated in part though interleukin 1 (IL‐1) signals, supporting a role for B and T lymphocytes in diabetic cardiomyopathy. Some of the post‐translational modifications of the ryanodine receptor (RyR) by RCS, ROS and RNS stress are known to affect its gating and Ca2+ sensitivity, which contributes to RyR dysregulation in diabetic cardiomyopathy. RyRs and immune‐related molecules are important signalling species in many physiological and pathophysiological processes in various heart and cardiovascular diseases. However, little is known regarding the mechanistic relationship between RyRs and immune‐related molecules in diabetes, as well as the mechanisms mediating complex communication among cardiomyocytes, fibroblasts and immune cells. This review highlights new findings on the complex cellular communications in the pathogenesis and progression of diabetic cardiomyopathy. We discuss potential therapeutic applications targeting RyRs and immune‐related molecules in diabetic complications.
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Affiliation(s)
- Cheng-Ju Tian
- College of Rehabilitation and Sports Medicine, Jinzhou Medical University, Jinzhou, China
| | - Jing-Hua Zhang
- Department of Psychiatry, Tianjin Anding Hospital, Tianjin, China
| | - Jinfeng Liu
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Zhuang Ma
- College of Rehabilitation and Sports Medicine, Jinzhou Medical University, Jinzhou, China
| | - Zhong Zhen
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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16
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Fouda MA, Ruben PC. Protein Kinases Mediate Anti-Inflammatory Effects of Cannabidiol and Estradiol Against High Glucose in Cardiac Sodium Channels. Front Pharmacol 2021; 12:668657. [PMID: 33995099 PMCID: PMC8115126 DOI: 10.3389/fphar.2021.668657] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 04/16/2021] [Indexed: 12/15/2022] Open
Abstract
Background: Cardiovascular anomalies are predisposing factors for diabetes-induced morbidity and mortality. Recently, we showed that high glucose induces changes in the biophysical properties of the cardiac voltage-gated sodium channel (Nav1.5) that could be strongly correlated to diabetes-induced arrhythmia. However, the mechanisms underlying hyperglycemia-induced inflammation, and how inflammation provokes cardiac arrhythmia, are not well understood. We hypothesized that inflammation could mediate the high glucose-induced biophyscial changes on Nav1.5 through protein phosphorylation by protein kinases A and C. We also hypothesized that this signaling pathway is, at least partly, involved in the cardiprotective effects of cannabidiol (CBD) and 17β-estradiol (E2). Methods and Results: To test these ideas, we used Chinese hamster ovarian (CHO) cells transiently co-transfected with cDNA encoding human Nav1.5 α-subunit under control, a cocktail of inflammatory mediators or 100 mM glucose conditions (for 24 h). We used electrophysiological experiments and action potential modeling. Inflammatory mediators, similar to 100 mM glucose, right shifted the voltage dependence of conductance and steady-state fast inactivation and increased persistent current leading to computational prolongation of action potential (hyperexcitability) which could result in long QT3 arrhythmia. We also used human iCell cardiomyocytes derived from inducible pluripotent stem cells (iPSC-CMs) as a physiologically relevant system, and they replicated the effects produced by inflammatory mediators observed in CHO cells. In addition, activators of PK-A or PK-C replicated the inflammation-induced gating changes of Nav1.5. Inhibitors of PK-A or PK-C, CBD or E2 mitigated all the potentially deleterious effects provoked by high glucose/inflammation. Conclusion: These findings suggest that PK-A and PK-C may mediate the anti-inflammatory effects of CBD and E2 against high glucose-induced arrhythmia. CBD, via Nav1.5, may be a cardioprotective therapeutic approach in diabetic postmenopausal population.
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Affiliation(s)
- Mohamed A Fouda
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada.,Department of Pharmacology and Toxicology, Alexandria University, Alexandria, Egypt
| | - Peter C Ruben
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
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17
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Samidurai A, Xi L, Das A, Iness AN, Vigneshwar NG, Li PL, Singla DK, Muniyan S, Batra SK, Kukreja RC. Role of phosphodiesterase 1 in the pathophysiology of diseases and potential therapeutic opportunities. Pharmacol Ther 2021; 226:107858. [PMID: 33895190 DOI: 10.1016/j.pharmthera.2021.107858] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 03/17/2021] [Accepted: 04/14/2021] [Indexed: 12/15/2022]
Abstract
Cyclic nucleotide phosphodiesterases (PDEs) are superfamily of enzymes that regulate the spatial and temporal relationship of second messenger signaling in the cellular system. Among the 11 different families of PDEs, phosphodiesterase 1 (PDE1) sub-family of enzymes hydrolyze both 3',5'-cyclic adenosine monophosphate (cAMP) and 3',5'-cyclic guanosine monophosphate (cGMP) in a mutually competitive manner. The catalytic activity of PDE1 is stimulated by their binding to Ca2+/calmodulin (CaM), resulting in the integration of Ca2+ and cyclic nucleotide-mediated signaling in various diseases. The PDE1 family includes three subtypes, PDE1A, PDE1B and PDE1C, which differ for their relative affinities for cAMP and cGMP. These isoforms are differentially expressed throughout the body, including the cardiovascular, central nervous system and other organs. Thus, PDE1 enzymes play a critical role in the pathophysiology of diseases through the fundamental regulation of cAMP and cGMP signaling. This comprehensive review provides the current research on PDE1 and its potential utility as a therapeutic target in diseases including the cardiovascular, pulmonary, metabolic, neurocognitive, renal, cancers and possibly others.
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Affiliation(s)
- Arun Samidurai
- Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, VA 23298-0204, USA
| | - Lei Xi
- Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, VA 23298-0204, USA
| | - Anindita Das
- Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, VA 23298-0204, USA
| | - Audra N Iness
- Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, VA 23298-0204, USA
| | - Navin G Vigneshwar
- Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, VA 23298-0204, USA
| | - Pin-Lan Li
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA 23298-0613, USA
| | - Dinender K Singla
- Division of Metabolic and Cardiovascular Sciences, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32816, USA
| | - Sakthivel Muniyan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198-5870, USA
| | - Surinder K Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198-5870, USA
| | - Rakesh C Kukreja
- Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, VA 23298-0204, USA.
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18
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Varshney R, Ranjit R, Chiao YA, Kinter M, Ahn B. Myocardial Hypertrophy and Compensatory Increase in Systolic Function in a Mouse Model of Oxidative Stress. Int J Mol Sci 2021; 22:2039. [PMID: 33670798 PMCID: PMC7921997 DOI: 10.3390/ijms22042039] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 01/28/2021] [Accepted: 02/11/2021] [Indexed: 12/12/2022] Open
Abstract
Free radicals, or reactive oxygen species, have been implicated as one of the primary causes of myocardial pathologies elicited by chronic diseases and age. The imbalance between pro-oxidants and antioxidants, termed "oxidative stress", involves several pathological changes in mouse hearts, including hypertrophy and cardiac dysfunction. However, the molecular mechanisms and adaptations of the hearts in mice lacking cytoplasmic superoxide dismutase (Sod1KO) have not been investigated. We used echocardiography to characterize cardiac function and morphology in vivo. Protein expression and enzyme activity of Sod1KO were confirmed by targeted mass spectrometry and activity gel. The heart weights of the Sod1KO mice were significantly increased compared with their wildtype peers. The increase in heart weights was accompanied by concentric hypertrophy, posterior wall thickness of the left ventricles (LV), and reduced LV volume. Activated downstream pathways in Sod1KO hearts included serine-threonine kinase and ribosomal protein synthesis. Notably, the reduction in LV volume was compensated by enhanced systolic function, measured by increased ejection fraction and fractional shortening. A regulatory sarcomeric protein, troponin I, was hyper-phosphorylated in Sod1KO, while the vinculin protein was upregulated. In summary, mice lacking cytoplasmic superoxide dismutase were associated with an increase in heart weights and concentric hypertrophy, exhibiting a pathological adaptation of the hearts to oxidative stress.
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Affiliation(s)
- Rohan Varshney
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73103, USA; (R.V.); (R.R.); (Y.A.C.); (M.K.)
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
- Harold Hamm Diabetes Center, University of Oklahoma Health Science Center, Oklahoma City, OK 73104, USA
| | - Rojina Ranjit
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73103, USA; (R.V.); (R.R.); (Y.A.C.); (M.K.)
| | - Ying Ann Chiao
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73103, USA; (R.V.); (R.R.); (Y.A.C.); (M.K.)
| | - Michael Kinter
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73103, USA; (R.V.); (R.R.); (Y.A.C.); (M.K.)
| | - Bumsoo Ahn
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73103, USA; (R.V.); (R.R.); (Y.A.C.); (M.K.)
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19
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Liu Y, Chen J, Fontes SK, Bautista EN, Cheng Z. Physiological And Pathological Roles Of Protein Kinase A In The Heart. Cardiovasc Res 2021; 118:386-398. [PMID: 33483740 DOI: 10.1093/cvr/cvab008] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/30/2020] [Accepted: 01/08/2021] [Indexed: 12/21/2022] Open
Abstract
Protein kinase A (PKA) is a central regulator of cardiac performance and morphology. Myocardial PKA activation is induced by a variety of hormones, neurotransmitters and stress signals, most notably catecholamines secreted by the sympathetic nervous system. Catecholamines bind β-adrenergic receptors to stimulate cAMP-dependent PKA activation in cardiomyocytes. Elevated PKA activity enhances Ca2+ cycling and increases cardiac muscle contractility. Dynamic control of PKA is essential for cardiac homeostasis, as dysregulation of PKA signaling is associated with a broad range of heart diseases. Specifically, abnormal PKA activation or inactivation contributes to the pathogenesis of myocardial ischemia, hypertrophy, heart failure, as well as diabetic, takotsubo, or anthracycline cardiomyopathies. PKA may also determine sex-dependent differences in contractile function and heart disease predisposition. Here, we describe the recent advances regarding the roles of PKA in cardiac physiology and pathology, highlighting previous study limitations and future research directions. Moreover, we discuss the therapeutic strategies and molecular mechanisms associated with cardiac PKA biology. In summary, PKA could serve as a promising drug target for cardioprotection. Depending on disease types and mechanisms, therapeutic intervention may require either inhibition or activation of PKA. Therefore, specific PKA inhibitors or activators may represent valuable drug candidates for the treatment of heart diseases.
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Affiliation(s)
- Yuening Liu
- Department of Pharmaceutical Sciences, Washington State University, PBS 423, 412 E. Spokane Falls Blvd, ., Spokane, WA, 99202-2131, USA
| | - Jingrui Chen
- Department of Pharmaceutical Sciences, Washington State University, PBS 423, 412 E. Spokane Falls Blvd, ., Spokane, WA, 99202-2131, USA
| | - Shayne K Fontes
- Department of Pharmaceutical Sciences, Washington State University, PBS 423, 412 E. Spokane Falls Blvd, ., Spokane, WA, 99202-2131, USA
| | - Erika N Bautista
- Department of Pharmaceutical Sciences, Washington State University, PBS 423, 412 E. Spokane Falls Blvd, ., Spokane, WA, 99202-2131, USA
| | - Zhaokang Cheng
- Department of Pharmaceutical Sciences, Washington State University, PBS 423, 412 E. Spokane Falls Blvd, ., Spokane, WA, 99202-2131, USA
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20
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Liu X, Liu D, Shuai Y, Li H, Zhao H, Qu X, Chu S, Zhang X. Effects of HuoxueJiangtang decoction alone or in combination with metformin on renal function and renal cortical mRNA expression in diabetic nephropathy rats. PHARMACEUTICAL BIOLOGY 2020; 58:1123-1130. [PMID: 33191822 PMCID: PMC7671697 DOI: 10.1080/13880209.2020.1844242] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
CONTEXT HuoxueJiangtang decoction (ZY) is a traditional Chinese medicine for the treatment of diabetes. OBJECTIVE The protective effect of ZY on renal injury in diabetic nephropathy rats was investigated in this study. MATERIALS AND METHODS Fifty 4-week-old SPF Wistar male rats were selected to construct diabetic nephropathy model rats (DN) group by continuous high-fat feeding for 4 weeks, followed by a tail vein injection of 30 mg/kg streptozotocin for 1 week. The experimental rats were divided into six groups of 10 rats: normal (control), DN, DN + ZY, DN + metformin, DN + metformin + ZY, and DN + metformin + captopril (positive control) groups. Among the groups, 6.25 g/kg ZY, 250 mg/kg metformin, and 17.5 mg/kg captopril were given to the rats by gavage once a day for 16 weeks. Blood glucose, dietary behaviour, biochemical indicators, and gene expression changes were measured in each group. RESULTS Metformin + ZY treatment significantly lowered blood glucose, water intake, urine total protein, urine albumin, urine volume, serum triglyceride, and serum cholesterol levels in the DN group. The pathological changes of kidney tissue showed that the DN + metformin + ZY group had a protective effect on kidney tissue damage. And ZY and metformin + ZY treatments repaired the expression of genes in the DN group. DISCUSSION AND CONCLUSION The ZY and metformin combined treatment showed a clear therapeutic effect on kidney damage in DN. This study provides a potential mechanism for the treatment of diabetic nephropathy with ZY combined with metformin.
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Affiliation(s)
- Xuemei Liu
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Deliang Liu
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Youyou Shuai
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Huilin Li
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
- CONTACT Huilin Li Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, 1# Fuhua Road, Shenzhen, Futian District, 518033, China
| | - Hengxia Zhao
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Xin Qu
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Shufang Chu
- Department of Endocrinology, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Xuewen Zhang
- Institute of National Master of TCM, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
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21
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Erdogan BR, Michel MC, Arioglu-Inan E. Expression and Signaling of β-Adrenoceptor Subtypes in the Diabetic Heart. Cells 2020; 9:cells9122548. [PMID: 33256212 PMCID: PMC7759850 DOI: 10.3390/cells9122548] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/20/2020] [Accepted: 11/24/2020] [Indexed: 12/18/2022] Open
Abstract
Diabetes is a chronic, endocrine disorder that effects millions of people worldwide. Cardiovascular complications are the major cause of diabetes-related morbidity and mortality. Cardiac β1- and β2-adrenoceptor (AR) stimulation mediates positive inotropy and chronotropy, whereas β3-AR mediates negative inotropic effect. Changes in β-AR responsiveness are thought to be an important factor that contributes to the diabetic cardiac dysfunction. Diabetes related changes in β-AR expression, signaling, and β-AR mediated cardiac function have been studied by several investigators for many years. In the present review, we have screened PubMed database to obtain relevant articles on this topic. Our search has ended up with wide range of different findings about the effect of diabetes on β-AR mediated changes both in molecular and functional level. Considering these inconsistent findings, the effect of diabetes on cardiac β-AR still remains to be clarified.
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Affiliation(s)
- Betul R. Erdogan
- Department of Pharmacology, Faculty of Pharmacy, Ankara University, 06560 Ankara, Turkey;
- Department of Pharmacology, Faculty of Pharmacy, Izmir Katip Celebi University, 35620 Izmir, Turkey
| | - Martin C. Michel
- Department of Pharmacology, Johannes Gutenberg University, 55131 Mainz, Germany;
| | - Ebru Arioglu-Inan
- Department of Pharmacology, Faculty of Pharmacy, Ankara University, 06560 Ankara, Turkey;
- Correspondence:
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22
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Eyster CA, Matsuzaki S, Newhardt MF, Giorgione JR, Humphries KM. Diabetes induced decreases in PKA signaling in cardiomyocytes: The role of insulin. PLoS One 2020; 15:e0231806. [PMID: 32817622 PMCID: PMC7444578 DOI: 10.1371/journal.pone.0231806] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 08/06/2020] [Indexed: 11/24/2022] Open
Abstract
The cAMP-dependent protein kinase (PKA) signaling pathway is the primary means by which the heart regulates moment-to-moment changes in contractility and metabolism. We have previously found that PKA signaling is dysfunctional in the diabetic heart, yet the underlying mechanisms are not fully understood. The objective of this study was to determine if decreased insulin signaling contributes to a dysfunctional PKA response. To do so, we isolated adult cardiomyocytes (ACMs) from wild type and Akita type 1 diabetic mice. ACMs were cultured in the presence or absence of insulin and PKA signaling was visualized by immunofluorescence microscopy using an antibody that recognizes proteins specifically phosphorylated by PKA. We found significant decreases in proteins phosphorylated by PKA in wild type ACMs cultured in the absence of insulin. PKA substrate phosphorylation was decreased in Akita ACMs, as compared to wild type, and unresponsive to the effects of insulin. The decrease in PKA signaling was observed regardless of whether the kinase was stimulated with a beta-agonist, a cell-permeable cAMP analog, or with phosphodiesterase inhibitors. PKA content was unaffected, suggesting that the decrease in PKA signaling may be occurring by the loss of specific PKA substrates. Phospho-specific antibodies were used to discern which potential substrates may be sensitive to the loss of insulin. Contractile proteins were phosphorylated similarly in wild type and Akita ACMs regardless of insulin. However, phosphorylation of the glycolytic regulator, PFK-2, was significantly decreased in an insulin-dependent manner in wild type ACMs and in an insulin-independent manner in Akita ACMs. These results demonstrate a defect in PKA activation in the diabetic heart, mediated in part by deficient insulin signaling, that results in an abnormal activation of a primary metabolic regulator.
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Affiliation(s)
- Craig A. Eyster
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Satoshi Matsuzaki
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Maria F. Newhardt
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, United States of America
| | - Jennifer R. Giorgione
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Kenneth M. Humphries
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, United States of America
- * E-mail:
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23
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Gong J, Zhou F, Wang SXX, Xu J, Xiao F. Caveolin-3 protects diabetic hearts from acute myocardial infarction/reperfusion injury through β2AR, cAMP/PKA, and BDNF/TrkB signaling pathways. Aging (Albany NY) 2020; 12:14300-14313. [PMID: 32692723 PMCID: PMC7425465 DOI: 10.18632/aging.103469] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 05/27/2020] [Indexed: 12/11/2022]
Abstract
Diabetes mellitus (DM) might increase the incidence and mortality of cardiac failure after acute myocardial infarction (AMI) in patients. We attempted to investigate whether Caveolin-3 showed beneficial effects in DM patient post-MI injury through the cAMP/PKA and BDNF/TrkB signaling pathways. The activity of ADRB2 and cAMP/PKA signaling were impaired in nondiabetic ischemia-reperfusion (I/R) group compared with the sham and DM groups and were more impaired in diabetic I/R group than in the I/R group. In H9C2 cells, high-glucose (HG) stimulation further enhanced H/R injury by promoting cell apoptosis, inhibiting cell viability, and suppressing TrkB and Akt signaling; in contrast, the ADRB2 agonist isoprenaline (ISO) significantly attenuated the above-described effects of HG stimulation. Caveolin-3 overexpression promoted the localization of ADRB2 on the membrane of the HG-stimulated H9C2 cells, subsequently inhibiting apoptosis and promoting cell viability. Under HG stimulation, Caveolin-3 overexpression enhanced the activity of the cAMP/PKA and BDNF/TrkB signaling pathways, whereas ADRB2 silencing reversed the effects of Caveolin-3 overexpression. In conclusion, ADRB2 agonist promoted the activity of the BDNF/TrkB and cAMP/PKA signaling pathways, mitigating the HG-aggravated H/R injuries in H9C2 cells. Caveolin-3 exerts a protective effect on diabetic hearts against I/R damage through the β2AR, cAMP/PKA, and BDNF/TrkB signaling pathways.
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Affiliation(s)
- Jiaji Gong
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha 410011, China
| | - Fan Zhou
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha 410011, China
| | - Simin Xie Xin Wang
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha 410011, China
| | - Junmei Xu
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha 410011, China
| | - Feng Xiao
- Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha 410011, China
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24
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Sunilkumar S, Ford SM. Elevated glucose concentration in culture media decreases membrane trafficking of SGLT2 in LLC-PK 1 cells via a cAMP/PKA-dependent pathway. Am J Physiol Cell Physiol 2019; 316:C913-C924. [PMID: 30943059 DOI: 10.1152/ajpcell.00433.2018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Na+-dependent glucose reabsorption in the renal proximal tubule is dynamically regulated by changes in blood glucose levels. There is, however, a disparity in reports studying the relationship between hyperglycemia and Na+-glucose-linked transporter (SGLT) function and expression. Similarly, manipulation of the glucose content in growth media of cultured renal cells has been shown to influence SGLT activity. In this investigation, SGLT activity was significantly lower in proximal tubule LLC-PK1 cells cultured in medium containing 17.5 than 5 mM glucose. α-Methyl d-glucopyranoside (AMG) transport kinetics showed reduced apparent Vmax and Km in cells grown in 17.5 mM glucose. SGLT2 was identified as the isoform responsible for glucose transport, and protein expression analyses showed decreased apical membrane localization of SGLT2 in cells grown in 17.5 mM glucose, explaining the reduced activity. Multiple signaling pathways have been implicated in regulation of SGLT activity and trafficking. Elevated media glucose decreased intracellular cAMP and PKA activation, leading to decreased SGLT2 trafficking into the plasma membrane, which was reversed after treatment with 1 µM forskolin. The effects of media glucose on SGLT activity were found to be dependent on p38 MAPK activation due to PKA-mediated signaling. Glucose-modulated AMG uptake is reversible and was associated with altered SGLT2 membrane trafficking and cAMP alterations. In summary, elevated glucose concentrations in culture medium decrease SGLT activity in LLC-PK1 cells by reducing membrane trafficking of SGLT2 via decreasing intracellular cAMP, resulting in a lowered PKA-dependent phosphorylation of p38 MAPK.
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Affiliation(s)
| | - Sue M Ford
- Department of Pharmaceutical Sciences, St. John's University , Queens, New York
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25
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Yang S, Shao T, Yu P, Cao R, Zhang M, Wen K, Fan M, He B. Neuronostatin promotes soluble Aβ1-42 oligomers -induced spatial learning and memory impairments in mice. Behav Brain Res 2019; 364:62-74. [PMID: 30753874 DOI: 10.1016/j.bbr.2019.01.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 01/06/2019] [Accepted: 01/25/2019] [Indexed: 12/16/2022]
Abstract
Neuronostatin (NST) is composed of a 13-amino acid and amidated peptide hormone encoded in the somatostatin (SST) gene, and plays an important physiological function in diverse tissues. Previous studies have shown that intracerebroventricular (i.c.v.) and intra-hippocampally administration of NST can significantly decrease the percentage of novel object exploration time in the step-down test. In this study, to define the contribution of NST to cognitive impairments induced by soluble Aβ42 oligomers (oAβ), along with the underlying mechanisms. This study used behavioral, biochemical and immunohistological methods to find that i.c.v. administration of NST (3 nmol/mouse) disrupted the ability of spatial learning and memory in mice, led to increase the levels of cAMP, GPR107 protein expression and phosphorylation of PKA at Thr197 in the cortex and hippocampus. NST promoted oAβ (1 nmol/mouse) -induced cognitive impairments, subsequently co-injection of NST and oAβ increased the levels of GPR107 expression and PKA phosphorylation, which also led to hyperactivation of GFAP in the cortex and neuroinflammation cytokines (IL-1β, IL-6 and TNFα) both in the cortex and hippocampus. Moreover, it was demonstrated that co-administration of NST and oAβ had increased the phosphorylation of Akt and GSK3β and reduced the levels of ATP and hexokinase (HK) activity in the cortex. Therefore, taken together, this study provided powerful insight into the mechanism of NST for memory impairments induced by oAβ, and may potentially serve as a promising target for future Alzheimer's disease interventions.
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Affiliation(s)
- Shaobin Yang
- College of Life Sciences, Northwest Normal University, Lanzhou, Gansu, 730070, China.
| | - Tingji Shao
- Department of Pharmacy, Gansu Provincial People's Hospital, Lanzhou, Gansu, 730000, China
| | - Peng Yu
- College of Life Sciences, Northwest Normal University, Lanzhou, Gansu, 730070, China
| | - Ruidong Cao
- College of Life Sciences, Northwest Normal University, Lanzhou, Gansu, 730070, China
| | - Mingyu Zhang
- College of Life Sciences, Northwest Normal University, Lanzhou, Gansu, 730070, China
| | - Kang Wen
- College of Life Sciences, Northwest Normal University, Lanzhou, Gansu, 730070, China
| | - Maorong Fan
- College of Life Sciences, Northwest Normal University, Lanzhou, Gansu, 730070, China
| | - Bosheng He
- College of Life Sciences, Northwest Normal University, Lanzhou, Gansu, 730070, China
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26
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Kim NJ, Baek JH, Lee J, Kim H, Song JK, Chun KH. A PDE1 inhibitor reduces adipogenesis in mice via regulation of lipolysis and adipogenic cell signaling. Exp Mol Med 2019; 51:1-15. [PMID: 30635550 PMCID: PMC6329698 DOI: 10.1038/s12276-018-0198-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 09/03/2018] [Accepted: 09/11/2018] [Indexed: 12/15/2022] Open
Abstract
Vinpocetine, a phosphodiesterase (PDE) type-1 inhibitor, increases cAMP and cGMP levels and is currently used for the management of cerebrovascular disorders, such as stroke, cerebral hemorrhage, and cognitive dysfunctions. In this study, we first determined that vinpocetine effectively suppressed adipogenesis and lipid accumulation. However, we questioned which molecular mechanism is involved because the role of PDE in adipogenesis is still controversial. Vinpocetine decreased adipogenic cell signaling, including the phosphorylation of ERK, AKT, JAK2, and STAT3, and adipokine secretion, including IL-6, IL-10, and IFN-α. Interestingly, vinpocetine increased the phosphorylation of HSL, suggesting the induction of the lipolysis pathway. Moreover, vinpocetine increased UCP1 expression via increasing cAMP and PKA phosphorylation. The administration of vinpocetine with a normal-chow diet (NFD) or a high-fat diet (HFD) in mice attenuated body weight gain in mice fed both the NFD and HFD. These effects were larger in the HFD-fed mice, without a difference in food intake. Vinpocetine drastically decreased fat weight and adipocyte cell sizes in gonadal and inguinal white adipose tissues and in the liver in both diet groups. Serum triacylglycerol levels and fasting blood glucose levels were reduced by vinpocetine treatment. This study suggested that vinpocetine prevents adipocyte differentiation through the inhibition of adipogenesis-associated cell signaling in the early stages of adipogenesis. Moreover, upregulating cAMP levels leads to an increase in lipolysis and UCP1 expression and then inhibits lipid accumulation. Therefore, we suggest that vinpocetine could be an effective agent for treating obesity, as well as improving cognition and cardiovascular function in older individuals. A compound extracted from the periwinkle plant can limit the over-production of fat cells and may be a useful agent for treating obesity. Being overweight is the result of changes in the size and number of fat cells, or adipocytes, in the body. Scientists are searching for molecules that can limit the growth and replication of adipocytes, but many anti-obesity agents found to date have unpleasant side-effects. Kyung-Hee Chun at Yonsei University in Seoul, South Korea and co-workers examined the effects of 502 naturally occuring compounds on adipocyte differentiation in cell culture. One compound called vincamine, which is safely used to treat vascular diseases in the brain, decreased cell signaling pathways involved in adipocyte generation in mice and also lowered fasting blood glucose levels.
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Affiliation(s)
- Nam-Jun Kim
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea
| | - Jung-Hwan Baek
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea
| | - JinAh Lee
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea
| | - HyeNa Kim
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea.,Tumor Microenvironment Research Branch, Division of Cancer Biology, National Cancer Center, Goyang, Republic of Korea
| | - Jun-Kyu Song
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea
| | - Kyung-Hee Chun
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea. .,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, Republic of Korea.
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27
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Hameed A, Ashraf S, Israr Khan M, Hafizur RM, Ul-Haq Z. Protein kinase A-dependent insulinotropic effect of selected flavonoids. Int J Biol Macromol 2018; 119:149-156. [DOI: 10.1016/j.ijbiomac.2018.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 06/26/2018] [Accepted: 07/04/2018] [Indexed: 01/21/2023]
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28
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Filchenko I, Simanenkova A, Chefu S, Kolpakova M, Vlasov T. Neuroprotective effect of glucagon-like peptide-1 receptor agonist is independent of glycaemia normalization in type two diabetic rats. Diab Vasc Dis Res 2018; 15:567-570. [PMID: 30024276 DOI: 10.1177/1479164118788079] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE Stroke is a severe complication of type 2 diabetes mellitus. Glucagon-like peptide-1 receptor agonists have been shown to have a neuroprotective effect in experimental diabetes. The aim of this study was to determine if their neuroprotective effect is an independent property of the drug independent of glycaemic control. METHODS This two-phase study used male Wistar rats. In the first phase, experimental animals were pretreated with liraglutide, while controls received only vehicle. After transient focal brain ischaemia modelling, neurological deficit and brain infarct volume were measured. In the second phase, the first and the second groups of experimental animals with type 2 diabetes mellitus received liraglutide and metformin, respectively, while control animals with diabetes received only vehicle. After transient focal brain ischaemia modelling, neurological deficit and brain infarct volume were evaluated. RESULTS Pretreatment with liraglutide in diabetic and non-diabetic animals reduced infarct size as compared to controls, while only non-diabetic liraglutide-treated rats presented neurologic deficit decreases. Despite glycaemia normalization, metformin-treated diabetic rats had no differences in stroke outcome when compared to the control group. CONCLUSION The neuroprotective effect of liraglutide is not associated with glycaemic control amelioration in experimental type 2 diabetes mellitus.
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MESH Headings
- Animals
- Blood Glucose/drug effects
- Blood Glucose/metabolism
- Brain/drug effects
- Brain/pathology
- Brain/physiopathology
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/complications
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/drug therapy
- Glucagon-Like Peptide-1 Receptor/agonists
- Glucagon-Like Peptide-1 Receptor/metabolism
- Hypoglycemic Agents/pharmacology
- Ischemic Attack, Transient/blood
- Ischemic Attack, Transient/etiology
- Ischemic Attack, Transient/pathology
- Ischemic Attack, Transient/prevention & control
- Liraglutide/pharmacology
- Male
- Metformin/pharmacology
- Neuroprotective Agents/pharmacology
- Rats, Wistar
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Affiliation(s)
- Irina Filchenko
- 1 Pervyj Sankt-Peterburgskij gosudarstvennyj medicinskij universitet imeni akademika I. P. Pavlova, Sankt Peterburg, Russian Federation
- 2 Nacional'nyj medicinskij issledovatel'skij centr imeni V A Almazova, Sankt Peterburg, Russian Federation
- 3 Institut evolucionnoj fiziologii i biohimii imeni I M Secenova RAN, Sankt Peterburg, Russian Federation
| | - Anna Simanenkova
- 1 Pervyj Sankt-Peterburgskij gosudarstvennyj medicinskij universitet imeni akademika I. P. Pavlova, Sankt Peterburg, Russian Federation
| | - Svetlana Chefu
- 1 Pervyj Sankt-Peterburgskij gosudarstvennyj medicinskij universitet imeni akademika I. P. Pavlova, Sankt Peterburg, Russian Federation
| | - Maria Kolpakova
- 1 Pervyj Sankt-Peterburgskij gosudarstvennyj medicinskij universitet imeni akademika I. P. Pavlova, Sankt Peterburg, Russian Federation
| | - Timur Vlasov
- 1 Pervyj Sankt-Peterburgskij gosudarstvennyj medicinskij universitet imeni akademika I. P. Pavlova, Sankt Peterburg, Russian Federation
- 2 Nacional'nyj medicinskij issledovatel'skij centr imeni V A Almazova, Sankt Peterburg, Russian Federation
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29
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Hafizur RM, Maryam K, Hameed A, zaheer L, Bano S, Sumbul S, Sana A, Saleem R, Naz S, Waraich RS, Ul-Haq Z, Faizi S. Insulin releasing effect of some pure compounds from Moringa oleifera on mice islets. Med Chem Res 2018. [DOI: 10.1007/s00044-018-2157-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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30
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Bockus LB, Matsuzaki S, Vadvalkar SS, Young ZT, Giorgione JR, Newhardt MF, Kinter M, Humphries KM. Cardiac Insulin Signaling Regulates Glycolysis Through Phosphofructokinase 2 Content and Activity. J Am Heart Assoc 2017; 6:e007159. [PMID: 29203581 PMCID: PMC5779029 DOI: 10.1161/jaha.117.007159] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 10/23/2017] [Indexed: 01/18/2023]
Abstract
BACKGROUND The healthy heart has a dynamic capacity to respond and adapt to changes in nutrient availability. Diabetes mellitus disrupts this metabolic flexibility and promotes cardiomyopathy through mechanisms that are not completely understood. Phosphofructokinase 2 (PFK-2) is a primary regulator of cardiac glycolysis and substrate selection, yet its regulation under normal and pathological conditions is unknown. This study was undertaken to determine how changes in insulin signaling affect PFK-2 content, activity, and cardiac metabolism. METHODS AND RESULTS Streptozotocin-induced diabetes mellitus, high-fat diet feeding, and fasted mice were used to identify how decreased insulin signaling affects PFK-2 and cardiac metabolism. Primary adult cardiomyocytes were used to define the mechanisms that regulate PFK-2 degradation. Both type 1 diabetes mellitus and a high-fat diet induced a significant decrease in cardiac PFK-2 protein content without affecting its transcript levels. Overnight fasting also induced a decrease in PFK-2, suggesting it is rapidly degraded in the absence of insulin signaling. An unbiased metabolomic study demonstrated that decreased PFK-2 in fasted animals is accompanied by an increase in glycolytic intermediates upstream of phosphofructokianse-1, whereas those downstream are diminished. Mechanistic studies using cardiomyocytes showed that, in the absence of insulin signaling, PFK-2 is rapidly degraded via both proteasomal- and chaperone-mediated autophagy. CONCLUSIONS The loss of PFK-2 content as a result of reduced insulin signaling impairs the capacity to dynamically regulate glycolysis and elevates the levels of early glycolytic intermediates. Although this may be beneficial in the fasted state to conserve systemic glucose, it represents a pathological impairment in diabetes mellitus.
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MESH Headings
- Animals
- Autophagy
- Cells, Cultured
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/enzymology
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Type 1/blood
- Diabetes Mellitus, Type 1/chemically induced
- Diabetes Mellitus, Type 1/enzymology
- Diabetes Mellitus, Type 1/pathology
- Diabetic Cardiomyopathies/blood
- Diabetic Cardiomyopathies/enzymology
- Diabetic Cardiomyopathies/etiology
- Diet, Fat-Restricted
- Diet, High-Fat
- Down-Regulation
- Enzyme Stability
- Fasting/blood
- Glycolysis
- Insulin/blood
- Mice, Inbred C57BL
- Molecular Chaperones/metabolism
- Myocardium/enzymology
- Myocardium/pathology
- Phosphofructokinase-2/genetics
- Phosphofructokinase-2/metabolism
- Phosphorylation
- Proteasome Endopeptidase Complex/metabolism
- Proteolysis
- Signal Transduction
- Streptozocin
- Time Factors
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Affiliation(s)
- Lee B Bockus
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Satoshi Matsuzaki
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Shraddha S Vadvalkar
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Zachary T Young
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Jennifer R Giorgione
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Maria F Newhardt
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
| | - Michael Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Kenneth M Humphries
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK
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31
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Witbrodt B, Goyal A, Kelkar AA, Dorbala S, Chow BJW, Di Carli MF, Williams BA, Merhige ME, Berman DS, Germano G, Beanlands RS, Min JK, Arasaratnam P, Sadreddini M, van Velthuijsen ML, Shaw LJ. Prognostic significance of blood pressure response during vasodilator stress Rb-82 positron emission tomography myocardial perfusion imaging. J Nucl Cardiol 2017; 24:1966-1975. [PMID: 27659457 DOI: 10.1007/s12350-016-0569-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 05/04/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND A drop in blood pressure (BP) or blunted BP response is an established high-risk marker during exercise myocardial perfusion imaging (MPI); however, data are sparse regarding the prognostic value of BP response in patients undergoing vasodilator stress rubidium-82 (Rb-82) Positron Emission Tomography (PET) MPI. METHODS AND RESULTS From the PET Prognosis Multicenter Registry, a cohort of 3413 patients underwent vasodilator stress Rb-82 PET MPI with dipyridamole or adenosine. We used multivariable Cox proportional hazard regression to analyze the association with mortality of four BP variables: stress minus rest systolic BP (∆SBP), stress minus rest diastolic BP (∆DBP), resting systolic BP (rSBP), and resting diastolic BP (rDBP). Covariates that had univariate P values <.10 were entered into the multivariable model. After median 1.7 years follow-up, 270 patients died. In univariate analyses, ∆SBP (P = .082), rSBP (P = .008), and rDBP (P < .001) were of potential prognostic value (P < .10), but ∆DBP was not (P = .96). After adjustment for other clinical and MPI variables, ∆SBP no longer independently predicted mortality (P = .082); only lower rSBP (P = .026) and lower rDBP (P = .045) remained independently prognostic. CONCLUSIONS In patients undergoing vasodilator stress MPI, only lower resting BP is an independent predictor of mortality along with other clinical and MPI variables; BP response does not appear to add to risk stratification in these patients.
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Affiliation(s)
- Bradley Witbrodt
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1462 Clifton Rd., Room 503, Atlanta, GA, 30322, USA.
| | - Abhinav Goyal
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1462 Clifton Rd., Room 503, Atlanta, GA, 30322, USA
| | - Anita A Kelkar
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1462 Clifton Rd., Room 503, Atlanta, GA, 30322, USA
| | | | - Benjamin J W Chow
- Department of Medicine, University of Ottawa Heart Institute, Ottawa, ON, USA
| | | | | | | | | | | | - Robert S Beanlands
- Department of Medicine, University of Ottawa Heart Institute, Ottawa, ON, USA
| | - James K Min
- Weill Cornell Medical College New York, New York, NY, USA
| | - Punitha Arasaratnam
- Department of Medicine, University of Ottawa Heart Institute, Ottawa, ON, USA
| | - Masoud Sadreddini
- Department of Medicine, University of Ottawa Heart Institute, Ottawa, ON, USA
| | | | - Leslee J Shaw
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1462 Clifton Rd., Room 503, Atlanta, GA, 30322, USA
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32
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Identification of risk genes associated with myocardial infarction based on the recursive feature elimination algorithm and support vector machine classifier. Mol Med Rep 2017; 17:1555-1560. [PMID: 29138828 PMCID: PMC5780094 DOI: 10.3892/mmr.2017.8044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 10/02/2017] [Indexed: 02/06/2023] Open
Abstract
The aim of the present study was to identify risk genes in myocardial infarction. Microarray data GSE34198, containing data from the peripheral blood of 49 myocardial infarction samples and 48 corresponding control samples, were downloaded from the Gene Expression Omnibus database to screen the differentially expressed genes (DEGs). The DEGs were used to construct a protein-protein interaction (PPI) network of patient samples, from which the feature genes were identified using the neighboring score method. The recursive feature elimination (RFE) algorithm was employed to select the risk genes among feature genes, which were subsequently applied to perform a support vector machine (SVM) classifier to identify the specific signature in myocardial infarction samples. Another dataset, GSE61144, was also downloaded to verify the efficacy of the classifier. A total of 724 downregulated and 483 upregulated DEGs were screened in patient samples compared with control samples in the GSE34198 dataset. The PPI network of myocardial infarction was comprised of 1,083 nodes (genes) and 46,363 lines (connections). Using the neighborhood scoring method, the top 100 feature genes in myocardial infarction samples were identified as the disease feature genes, which distinguish the myocardial infarction samples from the control samples. The RFE algorithm screened 15 risk genes, which were employed to construct a SVM classifier with an average precision of 88% to the patient sample following visualization by a confusion matrix. The predictive precision of the classifier on another microarray dataset, GSE61144, was 0.92, with an average true positive of 0.9278 and an average false positive of 0.2361. A-kinase-anchoring protein 12 (AKAP12) and glycine receptor α2 (GLRA2) were two risk genes in the SVM classifier. Therefore, AKAP12 and GLRA2 exert potential roles in the development of myocardial infarction, potentially by influencing cardiac contractility and protecting against ischemia-reperfusion injury, which may provide clues in developing potential diagnostic biomarkers or therapeutic targets for myocardial infarction.
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33
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Integration of flux measurements to resolve changes in anabolic and catabolic metabolism in cardiac myocytes. Biochem J 2017; 474:2785-2801. [PMID: 28706006 PMCID: PMC5545928 DOI: 10.1042/bcj20170474] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 12/18/2022]
Abstract
Although ancillary pathways of glucose metabolism are critical for synthesizing cellular building blocks and modulating stress responses, how they are regulated remains unclear. In the present study, we used radiometric glycolysis assays, [13C6]-glucose isotope tracing, and extracellular flux analysis to understand how phosphofructokinase (PFK)-mediated changes in glycolysis regulate glucose carbon partitioning into catabolic and anabolic pathways. Expression of kinase-deficient or phosphatase-deficient 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase in rat neonatal cardiomyocytes co-ordinately regulated glycolytic rate and lactate production. Nevertheless, in all groups, >40% of glucose consumed by the cells was unaccounted for via catabolism to pyruvate, which suggests entry of glucose carbons into ancillary pathways branching from metabolites formed in the preparatory phase of glycolysis. Analysis of 13C fractional enrichment patterns suggests that PFK activity regulates glucose carbon incorporation directly into the ribose and the glycerol moieties of purines and phospholipids, respectively. Pyrimidines, UDP-N-acetylhexosamine, and the fatty acyl chains of phosphatidylinositol and triglycerides showed lower 13C incorporation under conditions of high PFK activity; the isotopologue 13C enrichment pattern of each metabolite indicated limitations in mitochondria-engendered aspartate, acetyl CoA and fatty acids. Consistent with this notion, high glycolytic rate diminished mitochondrial activity and the coupling of glycolysis to glucose oxidation. These findings suggest that a major portion of intracellular glucose in cardiac myocytes is apportioned for ancillary biosynthetic reactions and that PFK co-ordinates the activities of the pentose phosphate, hexosamine biosynthetic, and glycerolipid synthesis pathways by directly modulating glycolytic intermediate entry into auxiliary glucose metabolism pathways and by indirectly regulating mitochondrial cataplerosis.
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34
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Johnson R, Dludla PV, Muller CJF, Huisamen B, Essop MF, Louw J. The Transcription Profile Unveils the Cardioprotective Effect of Aspalathin against Lipid Toxicity in an In Vitro H9c2 Model. Molecules 2017; 22:molecules22020219. [PMID: 28146135 PMCID: PMC6155936 DOI: 10.3390/molecules22020219] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 01/25/2017] [Indexed: 01/14/2023] Open
Abstract
Aspalathin, a C-glucosyl dihydrochalcone, has previously been shown to protect cardiomyocytes against hyperglycemia-induced shifts in substrate preference and subsequent apoptosis. However, the precise gene regulatory network remains to be elucidated. To unravel the mechanism and provide insight into this supposition, the direct effect of aspalathin in an isolated cell-based system, without the influence of any variables, was tested using an H9c2 cardiomyocyte model. Cardiomyocytes were exposed to high glucose (33 mM) for 48 h before post-treatment with or without aspalathin. Thereafter, RNA was extracted and RT2 PCR Profiler Arrays were used to profile the expression of 336 genes. Results showed that, 57 genes were differentially regulated in the high glucose or high glucose and aspalathin treated groups. Search Tool for the Retrieval of Interacting Genes/Proteins (STRING) analysis revealed lipid metabolism and molecular transport as the biological processes altered after high glucose treatment, followed by inflammation and apoptosis. Aspalathin was able to modulate key regulators associated with lipid metabolism (Adipoq, Apob, CD36, Cpt1, Pparγ, Srebf1/2, Scd1 and Vldlr), insulin resistance (Igf1, Akt1, Pde3 and Map2k1), inflammation (Il3, Il6, Jak2, Lepr, Socs3, and Tnf13) and apoptosis (Bcl2 and Chuk). Collectively, our results suggest that aspalathin could reverse metabolic abnormalities by activating Adipoq while modulating the expression of Pparγ and Srebf1/2, decreasing inflammation via Il6/Jak2 pathway, which together with an observed increased expression of Bcl2 prevents myocardium apoptosis.
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Affiliation(s)
- Rabia Johnson
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa.
| | - Phiwayinkosi V Dludla
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa.
| | - Christo J F Muller
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa.
- Department of Biochemistry and Microbiology, University of Zululand, Kwadlangezwa 3886, South Africa.
| | - Barbara Huisamen
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa.
| | - M Faadiel Essop
- Cardio-Metabolic Research Group (CMRG), Department of Physiological Sciences, Stellenbosch University, Stellenbosch 7599, South Africa.
| | - Johan Louw
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Department of Biochemistry and Microbiology, University of Zululand, Kwadlangezwa 3886, South Africa.
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35
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Jung SH, Kong DH, Jeon HY, Han ET, Park WS, Hong SH, Kim YM, Ha KS. Systematic investigation of protein kinase A substrate proteins using on-chip protein kinase kinetic profiling. Analyst 2017; 142:2239-2246. [DOI: 10.1039/c6an02682f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An on-chip protein kinase assay for profiling kinase kinetic parameters by introducing the substrate affinity (Km) and the phosphorylation rate (Vp) under physiological conditions.
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Affiliation(s)
- Se-Hui Jung
- Department of Molecular and Cellular Biochemistry
- Kangwon National University School of Medicine
- Kangwon-Do 24341
- Korea
| | - Deok-Hoon Kong
- Department of Molecular and Cellular Biochemistry
- Kangwon National University School of Medicine
- Kangwon-Do 24341
- Korea
| | - Hye-Yoon Jeon
- Department of Molecular and Cellular Biochemistry
- Kangwon National University School of Medicine
- Kangwon-Do 24341
- Korea
| | - Eun-Taek Han
- Department of Medical Environmental Biology and Tropical Medicine
- Kangwon National University School of Medicine
- Kangwon-Do 24341
- Korea
| | - Won Sun Park
- Department of Physiology
- Kangwon National University School of Medicine
- Kangwon-Do 24341
- Korea
| | - Seok-Ho Hong
- Department of Internal Medicine
- Kangwon National University School of Medicine
- Kangwon-Do 24341
- Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry
- Kangwon National University School of Medicine
- Kangwon-Do 24341
- Korea
| | - Kwon-Soo Ha
- Department of Molecular and Cellular Biochemistry
- Kangwon National University School of Medicine
- Kangwon-Do 24341
- Korea
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36
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Signaling Pathways in Cardiac Myocyte Apoptosis. BIOMED RESEARCH INTERNATIONAL 2016; 2016:9583268. [PMID: 28101515 PMCID: PMC5215135 DOI: 10.1155/2016/9583268] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 11/20/2016] [Indexed: 12/16/2022]
Abstract
Cardiovascular diseases, the number 1 cause of death worldwide, are frequently associated with apoptotic death of cardiac myocytes. Since cardiomyocyte apoptosis is a highly regulated process, pharmacological intervention of apoptosis pathways may represent a promising therapeutic strategy for a number of cardiovascular diseases and disorders including myocardial infarction, ischemia/reperfusion injury, chemotherapy cardiotoxicity, and end-stage heart failure. Despite rapid growth of our knowledge in apoptosis signaling pathways, a clinically applicable treatment targeting this cellular process is currently unavailable. To help identify potential innovative directions for future research, it is necessary to have a full understanding of the apoptotic pathways currently known to be functional in cardiac myocytes. Here, we summarize recent progress in the regulation of cardiomyocyte apoptosis by multiple signaling molecules and pathways, with a focus on the involvement of these pathways in the pathogenesis of heart disease. In addition, we provide an update regarding bench to bedside translation of this knowledge and discuss unanswered questions that need further investigation.
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37
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Gong G, Yuan H, Liu Y, Qi L. Investigation of the Effects and Mechanisms of Mai Tong Formula on Lower Limb Macroangiopathy in a Spontaneous Diabetic Rat Model. J Diabetes Res 2016; 2016:8076796. [PMID: 27995148 PMCID: PMC5138487 DOI: 10.1155/2016/8076796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 10/19/2016] [Indexed: 12/29/2022] Open
Abstract
A new Chinese herbal formula called Mai Tong Formulae (MTF) has recently been used to treat lower limb macroangiopathy in type 2 diabetes mellitus (T2DM) patients. In this study, we investigated the effect of MTF on lower limb macroangiopathy in a spontaneous diabetic rat model (GK rats). We found that MTF treatment significantly reduced serum fasting blood glucose (FBG), triglycerides (TG), total cholesterol (TC), IL6, and VEGF and increased serum insulin in this model. Histological and ultrastructural observations showed that MTF treatment significantly reduced vascular endothelial cell shedding and improved endothelium injuries. We further detect proteome alteration following MTF treatment. 25 differential proteins (DPs) abnormally expressed in GK rats were normalized by MTF treatment. These DPs significantly are enriched in biological processes and pathways that regulate muscle contraction and cGMP-PKG signaling pathway and so on. Additional protein-protein interaction (PPI) network analyses of the DPs showed that Fasn and Prkar2a are involved in the AMPK signaling pathway, and Gnas, Myh11, and Myh6 are involved in vascular smooth muscle contraction; these 5 DPs were validated by Western blotting. These results indicate that MTF treatment effectively treats lower limb macroangiopathy by regulating key proteins involved in AMPK signaling pathway and vascular smooth muscle contraction.
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Affiliation(s)
- Guangming Gong
- Endocrinology Department, Teaching Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
| | - Haipo Yuan
- Endocrinology Department, Teaching Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
| | - Ya Liu
- Endocrinology Department, Teaching Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
| | - Luguang Qi
- Endocrinology Department, Teaching Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
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