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Watanuki S, Kobayashi H, Sugiura Y, Yamamoto M, Karigane D, Shiroshita K, Sorimachi Y, Morikawa T, Fujita S, Shide K, Haraguchi M, Tamaki S, Mikawa T, Kondoh H, Nakano H, Sumiyama K, Nagamatsu G, Goda N, Okamoto S, Nakamura-Ishizu A, Shimoda K, Suematsu M, Suda T, Takubo K. SDHAF1 confers metabolic resilience to aging hematopoietic stem cells by promoting mitochondrial ATP production. Cell Stem Cell 2024:S1934-5909(24)00176-0. [PMID: 38772377 DOI: 10.1016/j.stem.2024.04.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 02/20/2024] [Accepted: 04/30/2024] [Indexed: 05/23/2024]
Abstract
Aging generally predisposes stem cells to functional decline, impairing tissue homeostasis. Here, we report that hematopoietic stem cells (HSCs) acquire metabolic resilience that promotes cell survival. High-resolution real-time ATP analysis with glucose tracing and metabolic flux analysis revealed that old HSCs reprogram their metabolism to activate the pentose phosphate pathway (PPP), becoming more resistant to oxidative stress and less dependent on glycolytic ATP production at steady state. As a result, old HSCs can survive without glycolysis, adapting to the physiological cytokine environment in bone marrow. Mechanistically, old HSCs enhance mitochondrial complex II metabolism during stress to promote ATP production. Furthermore, increased succinate dehydrogenase assembly factor 1 (SDHAF1) in old HSCs, induced by physiological low-concentration thrombopoietin (TPO) exposure, enables rapid mitochondrial ATP production upon metabolic stress, thereby improving survival. This study provides insight into the acquisition of resilience through metabolic reprogramming in old HSCs and its molecular basis to ameliorate age-related hematopoietic abnormalities.
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Affiliation(s)
- Shintaro Watanuki
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan; Division of Hematology, Department of Internal Medicine, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Hiroshi Kobayashi
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan; Department of Cell Fate Biology and Stem Cell Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
| | - Yuki Sugiura
- Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan; Center for Cancer Immunotherapy and Immunobiology, Kyoto University Graduate School of Medicine, Kyoto 606-8501, Japan
| | - Masamichi Yamamoto
- Department of Research Promotion and Management, National Cerebral and Cardiovascular Center, Osaka 564-8565, Japan
| | - Daiki Karigane
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan; Division of Hematology, Department of Internal Medicine, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Kohei Shiroshita
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan; Division of Hematology, Department of Internal Medicine, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Yuriko Sorimachi
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan; Department of Life Sciences and Medical BioScience, Waseda University School of Advanced Science and Engineering, Tokyo 162-8480, Japan
| | - Takayuki Morikawa
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Shinya Fujita
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan; Division of Hematology, Department of Internal Medicine, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Kotaro Shide
- Division of Hematology, Diabetes, and Endocrinology, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki 889-1692, Japan
| | - Miho Haraguchi
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Shinpei Tamaki
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Takumi Mikawa
- Geriatric Unit, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Hiroshi Kondoh
- Geriatric Unit, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Hiroyasu Nakano
- Department of Biochemistry, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Kenta Sumiyama
- Laboratory of Animal Genetics and Breeding, Department of Animal Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Aichi 464-8601, Japan; RIKEN Center for Biosystems Dynamics Research, Laboratory for Mouse Genetic Engineering, Osaka 565-0871, Japan
| | - Go Nagamatsu
- Center for Advanced Assisted Reproductive Technologies, University of Yamanashi, Kofu 400-8501, Japan
| | - Nobuhito Goda
- Department of Life Sciences and Medical BioScience, Waseda University School of Advanced Science and Engineering, Tokyo 162-8480, Japan
| | - Shinichiro Okamoto
- Division of Hematology, Department of Internal Medicine, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Ayako Nakamura-Ishizu
- Department of Microscopic and Developmental Anatomy, Tokyo Women's Medical University, Tokyo 162-8666, Japan
| | - Kazuya Shimoda
- Division of Hematology, Diabetes, and Endocrinology, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki 889-1692, Japan
| | - Makoto Suematsu
- Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan; Live Imaging Center, Central Institute for Experimental Medicine and Life Science, Kawasaki 210-0821, Japan
| | - Toshio Suda
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore; International Research Center for Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Keiyo Takubo
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan; Department of Cell Fate Biology and Stem Cell Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
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2
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Zuchelkowski BE, Peñaloza HF, Xiong Z, Wang L, Cifuentes-Pagano E, Rochon E, Yang M, Gingras S, Gladwin MT, Lee JS. Increased Neutrophil H 2O 2 Production and Enhanced Pulmonary Clearance of Klebsiella pneumoniae in G6PD A- Mice. RESEARCH SQUARE 2024:rs.3.rs-3931558. [PMID: 38559268 PMCID: PMC10980108 DOI: 10.21203/rs.3.rs-3931558/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The X-linked A- variant (rs1050828, Val68Met) in G6PDX accounts for glucose-6-phosphate (G6PD) deficiency in approximately 11% of African American males. This common, hypomorphic variant may impact pulmonary host defense and phagocyte function during pneumonia by altering levels of reactive oxygen species produced by host leukocytes. We used CRISPR-Cas9 technology to generate novel mouse strain with "humanized" G6PD A- variant containing non-synonymous Val68Met single nucleotide polymorphism. Male hemizygous or littermate wild-type (WT) controls were inoculated intratracheally with K. pneumoniae (KP2 serotype, ATCC 43816 strain,103 CFU inoculum). We examined leukocyte recruitment, organ bacterial burden, bone marrow neutrophil and macrophage (BMDM) phagocytic capacity, and hydrogen peroxide (H2O2) production. Unexpectedly, G6PD-deficient mice showed decreased lung bacterial burden (p=0.05) compared to controls 24-h post-infection. Extrapulmonary dissemination and bacteremia were significantly reduced in G6PD-deficient mice 48-h post-infection. Bronchoalveolar lavage fluid (BALF) IL-10 levels were elevated in G6PD-deficient mice (p=0.03) compared to controls at 24-h but were lower at 48-h (p=0.03). G6PD A- BMDMs show mildly decreased in vitro phagocytosis of pHrodo-labeled KP2 (p=0.03). Baseline, but not stimulated, H2O2 production by G6PD A- neutrophils was greater compared to WT neutrophils. G6PD A- variant demonstrate higher basal neutrophil H2O2 production and are protected against acute Klebsiella intrapulmonary infection.
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Affiliation(s)
| | | | | | | | | | | | - Minying Yang
- Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute
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3
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Grüning NM, Ralser M. Monogenic Disorders of ROS Production and the Primary Anti-Oxidative Defense. Biomolecules 2024; 14:206. [PMID: 38397443 PMCID: PMC10887155 DOI: 10.3390/biom14020206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 01/25/2024] [Accepted: 02/01/2024] [Indexed: 02/25/2024] Open
Abstract
Oxidative stress, characterized by an imbalance between the production of reactive oxygen species (ROS) and the cellular anti-oxidant defense mechanisms, plays a critical role in the pathogenesis of various human diseases. Redox metabolism, comprising a network of enzymes and genes, serves as a crucial regulator of ROS levels and maintains cellular homeostasis. This review provides an overview of the most important human genes encoding for proteins involved in ROS generation, ROS detoxification, and production of reduced nicotinamide adenine dinucleotide phosphate (NADPH), and the genetic disorders that lead to dysregulation of these vital processes. Insights gained from studies on inherited monogenic metabolic diseases provide valuable basic understanding of redox metabolism and signaling, and they also help to unravel the underlying pathomechanisms that contribute to prevalent chronic disorders like cardiovascular disease, neurodegeneration, and cancer.
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Affiliation(s)
- Nana-Maria Grüning
- Department of Biochemistry, Charité Universitätsmedizin Berlin, 10117 Berlin, Germany;
| | - Markus Ralser
- Department of Biochemistry, Charité Universitätsmedizin Berlin, 10117 Berlin, Germany;
- The Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
- Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany
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4
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Karunakaran U, Elumalai S, Chung SM, Maedler K, Won KC, Moon JS. Mitochondrial aldehyde dehydrogenase-2 coordinates the hydrogen sulfide - AMPK axis to attenuate high glucose-induced pancreatic β-cell dysfunction by glutathione antioxidant system. Redox Biol 2024; 69:102994. [PMID: 38128451 PMCID: PMC10776427 DOI: 10.1016/j.redox.2023.102994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/05/2023] [Accepted: 12/09/2023] [Indexed: 12/23/2023] Open
Abstract
Progression of β-cell loss in diabetes mellitus is significantly influenced by persistent hyperglycemia. At the cellular level, a number of signaling cascades affect the expression of apoptotic genes, ultimately resulting in β-cell failure; these cascades have not been elucidated. Mitochondrial aldehyde dehydrogenase-2 (ALDH2) plays a central role in the detoxification of reactive aldehydes generated from endogenous and exogenous sources and protects against mitochondrial deterioration in cells. Here we report that under diabetogenic conditions, ALDH2 is strongly inactivated in β-cells through CDK5-dependent glutathione antioxidant imbalance by glucose-6-phosphate dehydrogenase (G6PD) degradation. Intriguingly, CDK5 inhibition strengthens mitochondrial antioxidant defense through ALDH2 activation. Mitochondrial ALDH2 activation selectively preserves β-cells against high-glucose-induced dysfunction by activating AMPK and Hydrogen Sulfide (H2S) signaling. This is associated with the stabilization and enhancement of the activity of G6PD by SIRT2, a cytoplasmic NAD+-dependent deacetylase, and is thereby linked to an elevation in the GSH/GSSG ratio, which leads to the inhibition of mitochondrial dysfunction under high-glucose conditions. Furthermore, treatment with NaHS, an H2S donor, selectively preserves β-cell function by promoting ALDH2 activity, leading to the inhibition of lipid peroxidation by high-glucose concentrations. Collectively, our results provide the first direct evidence that ALDH2 activation enhances H2S-AMPK-G6PD signaling, leading to improved β-cell function and survival under high-glucose conditions via the glutathione redox balance.
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Affiliation(s)
- Udayakumar Karunakaran
- Innovative Center for Aging Research, Yeungnam University Medical Center, Daegu, Republic of Korea.
| | - Suma Elumalai
- Innovative Center for Aging Research, Yeungnam University Medical Center, Daegu, Republic of Korea
| | - Seung Min Chung
- Innovative Center for Aging Research, Yeungnam University Medical Center, Daegu, Republic of Korea; Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Republic of Korea
| | - Kathrin Maedler
- Islet Biology Laboratory, Centre for Biomolecular Interactions Bremen, University of Bremen, Bremen, Germany
| | - Kyu Chang Won
- Innovative Center for Aging Research, Yeungnam University Medical Center, Daegu, Republic of Korea; Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Republic of Korea.
| | - Jun Sung Moon
- Innovative Center for Aging Research, Yeungnam University Medical Center, Daegu, Republic of Korea; Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Republic of Korea.
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5
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Cao J, Yao QJ, Wu J, Chen X, Huang L, Liu W, Qian K, Wan JJ, Zhou BO. Deciphering the metabolic heterogeneity of hematopoietic stem cells with single-cell resolution. Cell Metab 2024; 36:209-221.e6. [PMID: 38171334 DOI: 10.1016/j.cmet.2023.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 09/14/2023] [Accepted: 12/04/2023] [Indexed: 01/05/2024]
Abstract
Metabolic status is crucial for stem cell functions; however, the metabolic heterogeneity of endogenous stem cells has never been directly assessed. Here, we develop a platform for high-throughput single-cell metabolomics (hi-scMet) of hematopoietic stem cells (HSCs). By combining flow cytometric isolation and nanoparticle-enhanced laser desorption/ionization mass spectrometry, we routinely detected >100 features from single cells. We mapped the single-cell metabolomes of all hematopoietic cell populations and HSC subpopulations with different division times, detecting 33 features whose levels exhibited trending changes during HSC proliferation. We found progressive activation of the oxidative pentose phosphate pathway (OxiPPP) from dormant to active HSCs. Genetic or pharmacological interference with OxiPPP increased reactive oxygen species level in HSCs, reducing HSC self-renewal upon oxidative stress. Together, our work uncovers the metabolic dynamics during HSC proliferation, reveals a role of OxiPPP for HSC activation, and illustrates the utility of hi-scMet in dissecting metabolic heterogeneity of immunophenotypically defined cell populations.
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Affiliation(s)
- Jing Cao
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Institute of Medical Robotics and Shanghai Academy of Experimental Medicine, Shanghai Jiao Tong University, Shanghai 200030, PRC; Shanghai Key Laboratory of Gynecologic Oncology, Department of Obstetrics and Gynecology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC; Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC
| | - Qi Jason Yao
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Jiao Wu
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Institute of Medical Robotics and Shanghai Academy of Experimental Medicine, Shanghai Jiao Tong University, Shanghai 200030, PRC; Shanghai Key Laboratory of Gynecologic Oncology, Department of Obstetrics and Gynecology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC; Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC
| | - Xiaonan Chen
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Lin Huang
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Institute of Medical Robotics and Shanghai Academy of Experimental Medicine, Shanghai Jiao Tong University, Shanghai 200030, PRC; Shanghai Key Laboratory of Gynecologic Oncology, Department of Obstetrics and Gynecology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC; Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC
| | - Wanshan Liu
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Institute of Medical Robotics and Shanghai Academy of Experimental Medicine, Shanghai Jiao Tong University, Shanghai 200030, PRC; Shanghai Key Laboratory of Gynecologic Oncology, Department of Obstetrics and Gynecology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC; Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC
| | - Kun Qian
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Institute of Medical Robotics and Shanghai Academy of Experimental Medicine, Shanghai Jiao Tong University, Shanghai 200030, PRC; Shanghai Key Laboratory of Gynecologic Oncology, Department of Obstetrics and Gynecology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC; Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PRC.
| | - Jing-Jing Wan
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
| | - Bo O Zhou
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China; State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences, Tianjin 300020, China.
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6
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Winans T, Oaks Z, Choudhary G, Patel A, Huang N, Faludi T, Krakko D, Nolan J, Lewis J, Blair S, Lai Z, Landas SK, Middleton F, Asara JM, Chung SK, Wyman B, Azadi P, Banki K, Perl A. mTOR-dependent loss of PON1 secretion and antiphospholipid autoantibody production underlie autoimmunity-mediated cirrhosis in transaldolase deficiency. J Autoimmun 2023; 140:103112. [PMID: 37742509 PMCID: PMC10957505 DOI: 10.1016/j.jaut.2023.103112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/31/2023] [Accepted: 09/05/2023] [Indexed: 09/26/2023]
Abstract
Transaldolase deficiency predisposes to chronic liver disease progressing from cirrhosis to hepatocellular carcinoma (HCC). Transition from cirrhosis to hepatocarcinogenesis depends on mitochondrial oxidative stress, as controlled by cytosolic aldose metabolism through the pentose phosphate pathway (PPP). Progression to HCC is critically dependent on NADPH depletion and polyol buildup by aldose reductase (AR), while this enzyme protects from carbon trapping in the PPP and growth restriction in TAL deficiency. Although AR inactivation blocked susceptibility to hepatocarcinogenesis, it enhanced growth restriction, carbon trapping in the non-oxidative branch of the PPP and failed to reverse the depletion of glucose 6-phosphate (G6P) and liver cirrhosis. Here, we show that inactivation of the TAL-AR axis results in metabolic stress characterized by reduced mitophagy, enhanced overall autophagy, activation of the mechanistic target of rapamycin (mTOR), diminished glycosylation and secretion of paraoxonase 1 (PON1), production of antiphospholipid autoantibodies (aPL), loss of CD161+ NK cells, and expansion of CD38+ Ito cells, which are responsive to treatment with rapamycin in vivo. The present study thus identifies glycosylation and secretion of PON1 and aPL production as mTOR-dependent regulatory checkpoints of autoimmunity underlying liver cirrhosis in TAL deficiency.
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Affiliation(s)
- T Winans
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA; Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - Z Oaks
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA; Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - G Choudhary
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA; Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - A Patel
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA; Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - N Huang
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA; Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - T Faludi
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - D Krakko
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - J Nolan
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - J Lewis
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - Sarah Blair
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - Z Lai
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - S K Landas
- Departments of Pathology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - F Middleton
- Departments of Neuroscience, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - J M Asara
- Division of Signal Transduction, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - S K Chung
- Faculty of Medicine, Macau University of Science and Technology, Taipa, Macau
| | - B Wyman
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA; Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - P Azadi
- University of Georgia, Athens, GA 30602, USA
| | - K Banki
- Departments of Pathology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA
| | - A Perl
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA; Departments of Microbiology and Immunology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA; Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, 13210, USA.
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7
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Gowthami N, Pursotham N, Dey G, Ghose V, Sathe G, Pruthi N, Shukla D, Gayathri N, Santhoshkumar R, Padmanabhan B, Chandramohan V, Mahadevan A, Srinivas Bharath MM. Neuroanatomical zones of human traumatic brain injury reveal significant differences in protein profile and protein oxidation: Implications for secondary injury events. J Neurochem 2023; 167:218-247. [PMID: 37694499 DOI: 10.1111/jnc.15953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 09/12/2023]
Abstract
Traumatic brain injury (TBI) causes significant neurological deficits and long-term degenerative changes. Primary injury in TBI entails distinct neuroanatomical zones, i.e., contusion (Ct) and pericontusion (PC). Their dynamic expansion could contribute to unpredictable neurological deterioration in patients. Molecular characterization of these zones compared with away from contusion (AC) zone is invaluable for TBI management. Using proteomics-based approach, we were able to distinguish Ct, PC and AC zones in human TBI brains. Ct was associated with structural changes (blood-brain barrier (BBB) disruption, neuroinflammation, axonal injury, demyelination and ferroptosis), while PC was associated with initial events of secondary injury (glutamate excitotoxicity, glial activation, accumulation of cytoskeleton proteins, oxidative stress, endocytosis) and AC displayed mitochondrial dysfunction that could contribute to secondary injury events and trigger long-term degenerative changes. Phosphoproteome analysis in these zones revealed that certain differentially phosphorylated proteins synergistically contribute to the injury events along with the differentially expressed proteins. Non-synaptic mitochondria (ns-mito) was associated with relatively more differentially expressed proteins (DEPs) compared to synaptosomes (Syn), while the latter displayed increased protein oxidation including tryptophan (Trp) oxidation. Proteomic analysis of immunocaptured complex I (CI) from Syn revealed increased Trp oxidation in Ct > PC > AC (vs. control). Oxidized W272 in the ND1 subunit of CI, revealed local conformational changes in ND1 and the neighboring subunits, as indicated by molecular dynamics simulation (MDS). Taken together, neuroanatomical zones in TBI show distinct protein profile and protein oxidation representing different primary and secondary injury events with potential implications for TBI pathology and neurological status of the patients.
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Affiliation(s)
- Niya Gowthami
- Department of Clinical Psychopharmacology and Neurotoxicology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Nithya Pursotham
- Department of Clinical Psychopharmacology and Neurotoxicology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Gourav Dey
- Proteomics and Bioinformatics Laboratory, Neurobiology Research Center, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
- Institute of Bioinformatics, Bengaluru, India
| | - Vivek Ghose
- Proteomics and Bioinformatics Laboratory, Neurobiology Research Center, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
- Institute of Bioinformatics, Bengaluru, India
| | - Gajanan Sathe
- Proteomics and Bioinformatics Laboratory, Neurobiology Research Center, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
- Institute of Bioinformatics, Bengaluru, India
| | - Nupur Pruthi
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Dhaval Shukla
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Narayanappa Gayathri
- Department of Neuropathology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Rashmi Santhoshkumar
- Department of Neuropathology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Balasundaram Padmanabhan
- Department of Biophysics, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - Vivek Chandramohan
- Department of Biotechnology, Siddaganga Institute of Technology (SIT), Tumakuru, India
| | - Anita Mahadevan
- Department of Neuropathology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
| | - M M Srinivas Bharath
- Department of Clinical Psychopharmacology and Neurotoxicology, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka, India
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8
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Kosenko EA, Alilova GA, Tikhonova LA. Impaired Enzymatic Antioxidant Defense in Erythrocytes of Rats with Ammonia-Induced Encephalopathy: Role of NMDA Receptors. BIOCHEMISTRY. BIOKHIMIIA 2023; 88:1404-1415. [PMID: 37770406 DOI: 10.1134/s0006297923090195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 09/30/2023]
Abstract
Hepatic encephalopathy (HE), a neuropsychiatric disorder developing in patients with severe hepatic dysfunction, has been known for more than a century. However, pathogenetic mechanisms of cerebral dysfunction associated with liver disease are still poorly understood. There is a consensus that the primary cause of HE is accumulation of ammonia in the brain as a result of impaired liver detoxification capacity or the portosystemic shunt. Current evidence suggests that ammonia toxicity is mediated by hyperactivation of glutamate receptors, mainly N-methyl-D-aspartate receptors (NMDARs), and affects brain aerobic metabolism, which provides energy for multiple specific functions and neuronal viability. Recent reports on the presence of functional NMDARs in erythrocytes and the data on the deviations of blood parameters from their normal ranges indicate impaired hemodynamics and reduced oxygen-carrying capacity of erythrocytes in most patients with HE, thus suggesting a relationship between erythrocyte damage and cerebral dysfunction. In order to understand how hyperammonemia (HA)-induced disturbances in the energy metabolism in the brain (which needs a constant supply of large amounts of oxygen in the blood) lead to encephalopathy, it is necessary to reveal ammonia-induced impairments in the energy metabolism and antioxidant defense system of erythrocytes and to explore a potential role of ammonia in reduced brain oxygenation. To identify the said missing link, the activities of antioxidant enzymes and concentrations of reduced glutathione (GSH), oxidized glutathione (GSSG), and H2O2 were measured in the erythrocytes of rats with HA that were injected with the noncompetitive NMDAR antagonist MK-801. We found that in rats with HA, ammonia was accumulated in erythrocytes (cells lacking ammonia removal enzymes), which made them more susceptible to the prooxidant environment created during oxidative stress. This effect was completely or partially inhibited by MK-801. The data obtained might help to identify the risk factors in cognitive disorders and facilitate prediction of unfavorable outcomes of hypoperfusion in patients with a blood elevated ammonia concentration.
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Affiliation(s)
- Elena A Kosenko
- Institute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia.
| | - Gubidat A Alilova
- Institute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia
| | - Lyudmila A Tikhonova
- Institute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia
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9
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Chama MA, Dziwornu GA, Popli E, Mas-Claret E, Egyir B, Ayine-Tora DM, Owusu KBA, Reid DG, Osei-Safo D, Duer M, Mulholland D, Bender A. Antimicrobial and in silico studies of the triterpenoids of Dichapetalum albidum. Heliyon 2023; 9:e18299. [PMID: 37539285 PMCID: PMC10395534 DOI: 10.1016/j.heliyon.2023.e18299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 07/07/2023] [Accepted: 07/13/2023] [Indexed: 08/05/2023] Open
Abstract
Here we report a new polyhydroxylated triterpene, 2β,6β,21α-trihydroxyfriedelan-3-one (4) isolated from the root and stem bark of Dichapetalum albidum A. Chev (Dichapetalaceae), along with six known triterpenoids (1-3, 5, 6, 8), sitosterol-3β-O-D-glucopyranoside (9), a dipeptide (7), and a tyramine derivative of coumaric acid (10). Friedelan-3-one (2) showed an antimicrobial activity (IC50) of 11.40 μg/mL against Bacillus cereus, while friedelan-3α-ol (1) gave an IC50 of 13.07 μg/mL against Staphylococcus aureus with ampicillin reference standard of 19.52 μg/mL and 0.30 μg/mL respectively. 3β-Acetyl tormentic acid (5) showed an IC50 of 12.50 μg/mL against Trypanosoma brucei brucei and sitosterol-3β-O-d-glucopyranoside (9) showed an IC50 of 5.06 μg/mL against Leishmania donovani with respective reference standards of IC50 5.02 μg/mL for suramin and IC50 0.27 μg/mL for amphotericin B. Molecular docking of the isolated compounds on the enzyme glucose-6-phosphate dehydrogenase (G6PDH) suggested 3β-acetyl tormentic acid (5) and sitosterol-3β-O-D-glucopyranoside (9) as plausible inhibitors of the enzyme in accordance with the experimental biological results observed.
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Affiliation(s)
- Mary A. Chama
- Department of Chemistry, SPMS, CBAS, University of Ghana, Ghana
| | | | - Elizabeth Popli
- Yusuf Hamied Department of Chemistry, University of Cambridge, United Kingdom
| | | | - Beverly Egyir
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Ghana
| | | | - Kofi B-A. Owusu
- Department of Parasitology, Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Ghana
| | - David G. Reid
- Yusuf Hamied Department of Chemistry, University of Cambridge, United Kingdom
| | | | - Melinda Duer
- Yusuf Hamied Department of Chemistry, University of Cambridge, United Kingdom
| | - Dulcie Mulholland
- Department of Chemistry, University of Surrey, Guildford, United Kingdom
| | - Andreas Bender
- Yusuf Hamied Department of Chemistry, University of Cambridge, United Kingdom
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10
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Zhang S, Zhang Y, Wen Z, Yang Y, Bu T, Bu X, Ni Q. Cognitive dysfunction in diabetes: abnormal glucose metabolic regulation in the brain. Front Endocrinol (Lausanne) 2023; 14:1192602. [PMID: 37396164 PMCID: PMC10312370 DOI: 10.3389/fendo.2023.1192602] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 05/25/2023] [Indexed: 07/04/2023] Open
Abstract
Cognitive dysfunction is increasingly recognized as a complication and comorbidity of diabetes, supported by evidence of abnormal brain structure and function. Although few mechanistic metabolic studies have shown clear pathophysiological links between diabetes and cognitive dysfunction, there are several plausible ways in which this connection may occur. Since, brain functions require a constant supply of glucose as an energy source, the brain may be more susceptible to abnormalities in glucose metabolism. Glucose metabolic abnormalities under diabetic conditions may play an important role in cognitive dysfunction by affecting glucose transport and reducing glucose metabolism. These changes, along with oxidative stress, inflammation, mitochondrial dysfunction, and other factors, can affect synaptic transmission, neural plasticity, and ultimately lead to impaired neuronal and cognitive function. Insulin signal triggers intracellular signal transduction that regulates glucose transport and metabolism. Insulin resistance, one hallmark of diabetes, has also been linked with impaired cerebral glucose metabolism in the brain. In this review, we conclude that glucose metabolic abnormalities play a critical role in the pathophysiological alterations underlying diabetic cognitive dysfunction (DCD), which is associated with multiple pathogenic factors such as oxidative stress, mitochondrial dysfunction, inflammation, and others. Brain insulin resistance is highly emphasized and characterized as an important pathogenic mechanism in the DCD.
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Affiliation(s)
| | | | | | | | | | | | - Qing Ni
- Department of Endocrinology, Guang’ anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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11
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Redox Regulation and Metabolic Dependency of Zika Virus Replication: Inhibition by Nrf2-Antioxidant Response and NAD(H) Antimetabolites. J Virol 2023; 97:e0136322. [PMID: 36688653 PMCID: PMC9972919 DOI: 10.1128/jvi.01363-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Viral infections alter host cell metabolism and homeostasis; however, the mechanisms that regulate these processes have only begun to be elucidated. We report here that Zika virus (ZIKV) infection activates the antioxidant nuclear factor erythroid 2-related factor 2 (Nrf2), which precedes oxidative stress. Downregulation of Nrf2 or inhibition of glutathione (GSH) synthesis resulted in significantly increased viral replication. Interestingly, 6-amino-nicotinamide (6-AN), a nicotinamide analog commonly used as an inhibitor of the pentose phosphate pathway (PPP), decreased viral replication by over 1,000-fold. This inhibition was neither recapitulated by the knockdown of PPP enzymes, glucose 6-phosphate dehydrogenase (G6PD), or 6-phosphogluconate dehydrogenase (6PGD), nor prevented by supplementation with ribose 5-phosphate. Instead, our metabolomics and metabolic phenotype studies support a mechanism in which 6-AN depletes cells of NAD(H) and impairs NAD(H)-dependent glycolytic steps resulting in inhibition of viral replication. The inhibitory effect of 6-AN was rescued with precursors of the salvage pathway but not with those of other NAD+ biosynthesis pathways. Inhibition of glycolysis reduced viral protein levels, which were recovered transiently. This transient recovery in viral protein synthesis was prevented when oxidative metabolism was inhibited by blockage of the mitochondrial pyruvate carrier, fatty acid oxidation, or glutaminolysis, demonstrating a compensatory role of mitochondrial metabolism in ZIKV replication. These results establish an antagonistic role for the host cell Nrf2/GSH/NADPH-dependent antioxidant response against ZIKV and demonstrate the dependency of ZIKV replication on NAD(H). Importantly, our work suggests the potential use of NAD(H) antimetabolite therapy against the viral infection. IMPORTANCE Zika virus (ZIKV) is a major public health concern of international proportions. While the incidence of ZIKV infections has declined substantially in recent years, the potential for the reemergence or reintroduction remains high. Although viral infection alters host cell metabolism and homeostasis to promote its replication, deciphering the mechanism(s) involved in these processes is important for identifying therapeutic targets. The present work reveals the complexities of host cell redox regulation and metabolic dependency of ZIKV replication. An antagonistic effect of the Nrf2/GSH/NADP(H)-dependent antioxidant response against ZIKV infection and an essential role of NAD(H) metabolism and glycolysis for viral replication are established for the first time. These findings highlight the potential use of NAD(H) antimetabolites to counter ZIKV infection and pathogenesis.
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12
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Oaks Z, Patel A, Huang N, Choudhary G, Winans T, Faludi T, Krakko D, Duarte M, Lewis J, Beckford M, Blair S, Kelly R, Landas SK, Middleton FA, Asara JM, Chung SK, Fernandez DR, Banki K, Perl A. Cytosolic aldose metabolism contributes to progression from cirrhosis to hepatocarcinogenesis. Nat Metab 2023; 5:41-60. [PMID: 36658399 PMCID: PMC9892301 DOI: 10.1038/s42255-022-00711-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/11/2022] [Indexed: 01/21/2023]
Abstract
Oxidative stress modulates carcinogenesis in the liver; however, direct evidence for metabolic control of oxidative stress during pathogenesis, particularly, of progression from cirrhosis to hepatocellular carcinoma (HCC), has been lacking. Deficiency of transaldolase (TAL), a rate-limiting enzyme of the non-oxidative branch of the pentose phosphate pathway (PPP), restricts growth and predisposes to cirrhosis and HCC in mice and humans. Here, we show that mitochondrial oxidative stress and progression from cirrhosis to HCC and acetaminophen-induced liver necrosis are critically dependent on NADPH depletion and polyol buildup by aldose reductase (AR), while this enzyme protects from carbon trapping in the PPP and growth restriction in TAL deficiency. Both TAL and AR are confined to the cytosol; however, their inactivation distorts mitochondrial redox homeostasis in opposite directions. The results suggest that AR acts as a rheostat of carbon recycling and NADPH output of the PPP with broad implications for disease progression from cirrhosis to HCC.
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Affiliation(s)
- Z Oaks
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
- Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - A Patel
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
- Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - N Huang
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
- Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - G Choudhary
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
- Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - T Winans
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
- Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - T Faludi
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - D Krakko
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - M Duarte
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - J Lewis
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - M Beckford
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - S Blair
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - R Kelly
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - S K Landas
- Departments of Pathology, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - F A Middleton
- Departments of Neuroscience, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - J M Asara
- Division of Signal Transduction, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - S K Chung
- Faculty of Medicine, Macau University of Science and Technology, Taipa, China
| | - D R Fernandez
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA
- Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - K Banki
- Departments of Pathology, State University of New York, Norton College of Medicine, Syracuse, NY, USA
| | - A Perl
- Departments of Medicine, State University of New York, Norton College of Medicine, Syracuse, NY, USA.
- Departments of Biochemistry and Molecular Biology, State University of New York, Norton College of Medicine, Syracuse, NY, USA.
- Departments of Microbiology and Immunology, State University of New York, Norton College of Medicine, Syracuse, NY, USA.
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13
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Stancill JS, Corbett JA. Hydrogen peroxide detoxification through the peroxiredoxin/thioredoxin antioxidant system: A look at the pancreatic β-cell oxidant defense. VITAMINS AND HORMONES 2022; 121:45-66. [PMID: 36707143 PMCID: PMC10058777 DOI: 10.1016/bs.vh.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Reactive oxygen species (ROS), such as hydrogen peroxide, are formed when molecular oxygen obtains additional electrons, increasing its reactivity. While low concentrations of hydrogen peroxide are necessary for regulation of normal cellular signaling events, high concentrations can be toxic. To maintain this balance between beneficial and deleterious concentrations of hydrogen peroxide, cells utilize antioxidants. Our recent work supports a primary role for peroxiredoxin, thioredoxin, and thioredoxin reductase as the oxidant defense pathway used by insulin-producing pancreatic β-cells. These three players work in an antioxidant cycle based on disulfide exchange, with oxidized targets ultimately being reduced using electrons provided by NADPH. Peroxiredoxins also participate in hydrogen peroxide-based signaling through disulfide exchange with redox-regulated target proteins. This chapter will describe the catalytic mechanisms of thioredoxin, thioredoxin reductase, and peroxiredoxin and provide an in-depth look at the roles these enzymes play in antioxidant defense pathways of insulin-secreting β-cells. Finally, we will evaluate the physiological relevance of peroxiredoxin-mediated hydrogen peroxide signaling as a regulator of β-cell function.
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Affiliation(s)
- Jennifer S Stancill
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, United States
| | - John A Corbett
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, United States.
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14
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Dornbos P, Koesterer R, Ruttenburg A, Nguyen T, Cole JB, Leong A, Meigs JB, Florez JC, Rotter JI, Udler MS, Flannick J. A combined polygenic score of 21,293 rare and 22 common variants improves diabetes diagnosis based on hemoglobin A1C levels. Nat Genet 2022; 54:1609-1614. [PMID: 36280733 PMCID: PMC9995082 DOI: 10.1038/s41588-022-01200-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 09/07/2022] [Indexed: 11/08/2022]
Abstract
Polygenic scores (PGSs) combine the effects of common genetic variants1,2 to predict risk or treatment strategies for complex diseases3-7. Adding rare variation to PGSs has largely unknown benefits and is methodically challenging. Here, we developed a method for constructing rare variant PGSs and applied it to calculate genetically modified hemoglobin A1C thresholds for type 2 diabetes (T2D) diagnosis7-10. The resultant rare variant PGS is highly polygenic (21,293 variants across 154 genes), depends on ultra-rare variants (72.7% observed in fewer than three people) and identifies significantly more undiagnosed T2D cases than expected by chance (odds ratio = 2.71; P = 1.51 × 10-6). A PGS combining common and rare variants is expected to identify 4.9 million misdiagnosed T2D cases in the United States-nearly 1.5-fold more than the common variant PGS alone. These results provide a method for constructing complex trait PGSs from rare variants and suggest that rare variants will augment common variants in precision medicine approaches for common disease.
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Affiliation(s)
- Peter Dornbos
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Ryan Koesterer
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
| | - Andrew Ruttenburg
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
| | - Trang Nguyen
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
| | - Joanne B Cole
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Division of Endocrinology, Boston Children's Hospital, Boston, MA, USA
- Center for Basic and Translational Obesity Research, Boston Children's Hospital, Boston, MA, USA
- Diabetes Unit, Massachusetts General Hospital, Boston, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Aaron Leong
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Diabetes Unit, Massachusetts General Hospital, Boston, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
- Division of General Internal Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - James B Meigs
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Division of General Internal Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Jose C Florez
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Diabetes Unit, Massachusetts General Hospital, Boston, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Jerome I Rotter
- The Institute for Translational Genomics and Population Sciences, Department of Pediatrics, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Miriam S Udler
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- Diabetes Unit, Massachusetts General Hospital, Boston, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Jason Flannick
- Programs in Metabolism Program, Broad Institute, Cambridge, MA, USA.
- Medical and Population Genetics Program, Broad Institute, Cambridge, MA, USA.
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA.
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
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15
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Warburg effect in colorectal cancer: the emerging roles in tumor microenvironment and therapeutic implications. J Hematol Oncol 2022; 15:160. [PMID: 36319992 PMCID: PMC9628128 DOI: 10.1186/s13045-022-01358-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 09/26/2022] [Indexed: 11/07/2022] Open
Abstract
Colorectal cancer (CRC) is the third most common cancer and the second leading cause of cancer-related death worldwide. Countless CRC patients undergo disease progression. As a hallmark of cancer, Warburg effect promotes cancer metastasis and remodels the tumor microenvironment, including promoting angiogenesis, immune suppression, cancer-associated fibroblasts formation and drug resistance. Targeting Warburg metabolism would be a promising method for the treatment of CRC. In this review, we summarize information about the roles of Warburg effect in tumor microenvironment to elucidate the mechanisms governing Warburg effect in CRC and to identify novel targets for therapy.
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16
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Gelbach PE, Zheng D, Fraser SE, White KL, Graham NA, Finley SD. Kinetic and data-driven modeling of pancreatic β-cell central carbon metabolism and insulin secretion. PLoS Comput Biol 2022; 18:e1010555. [PMID: 36251711 PMCID: PMC9612825 DOI: 10.1371/journal.pcbi.1010555] [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: 10/11/2021] [Revised: 10/27/2022] [Accepted: 09/08/2022] [Indexed: 11/06/2022] Open
Abstract
Pancreatic β-cells respond to increased extracellular glucose levels by initiating a metabolic shift. That change in metabolism is part of the process of glucose-stimulated insulin secretion and is of particular interest in the context of diabetes. However, we do not fully understand how the coordinated changes in metabolic pathways and metabolite products influence insulin secretion. In this work, we apply systems biology approaches to develop a detailed kinetic model of the intracellular central carbon metabolic pathways in pancreatic β-cells upon stimulation with high levels of glucose. The model is calibrated to published metabolomics datasets for the INS1 823/13 cell line, accurately capturing the measured metabolite fold-changes. We first employed the calibrated mechanistic model to estimate the stimulated cell's fluxome. We then used the predicted network fluxes in a data-driven approach to build a partial least squares regression model. By developing the combined kinetic and data-driven modeling framework, we gain insights into the link between β-cell metabolism and glucose-stimulated insulin secretion. The combined modeling framework was used to predict the effects of common anti-diabetic pharmacological interventions on metabolite levels, flux through the metabolic network, and insulin secretion. Our simulations reveal targets that can be modulated to enhance insulin secretion. The model is a promising tool to contextualize and extend the usefulness of metabolomics data and to predict dynamics and metabolite levels that are difficult to measure in vitro. In addition, the modeling framework can be applied to identify, explain, and assess novel and clinically-relevant interventions that may be particularly valuable in diabetes treatment.
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Affiliation(s)
- Patrick E. Gelbach
- Department of Biomedical Engineering, USC, Los Angeles, California, United States of America
| | - Dongqing Zheng
- Mork Family Department of Chemical Engineering and Materials Science, USC, Los Angeles, California, United States of America
| | - Scott E. Fraser
- Translational Imaging Center, University of Southern California, Los Angeles, California, United States of America
| | - Kate L. White
- Departments of Biological Sciences and Chemistry, Bridge Institute, USC Michelson Center, USC, Los Angeles, California, United States of America
| | - Nicholas A. Graham
- Mork Family Department of Chemical Engineering and Materials Science, USC, Los Angeles, California, United States of America
| | - Stacey D. Finley
- Department of Biomedical Engineering, USC, Los Angeles, California, United States of America
- Mork Family Department of Chemical Engineering and Materials Science, USC, Los Angeles, California, United States of America
- Department of Quantitative and Computational Biology, USC, Los Angeles, California, United States of America
- * E-mail:
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17
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Jin X, Li X, Li L, Zhong B, Hong Y, Niu J, Li B. Glucose-6-phosphate dehydrogenase exerts antistress effects independently of its enzymatic activity. J Biol Chem 2022; 298:102587. [PMID: 36243112 PMCID: PMC9667318 DOI: 10.1016/j.jbc.2022.102587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 10/05/2022] [Accepted: 10/08/2022] [Indexed: 11/06/2022] Open
Abstract
G6PD (glucose-6-phosphate dehydrogenase) is the rate-limiting enzyme in the oxidative pentose phosphate pathway that can generate cytosolic NADPH for biosynthesis and oxidative defense. Since cytosolic NADPH can be compensatively produced by other sources, the enzymatic activity deficiency alleles of G6PD are well tolerated in somatic cells but the effect of null mutations is unclear. Herein, we show that G6PD KO sensitizes cells to the stresses induced by hydrogen peroxide, superoxide, hypoxia, and the inhibition of the electron transport chain. This effect can be completely reversed by the expressions of natural mutants associated with G6PD deficiency, even without dehydrogenase activity, exactly like the WT G6PD. Furthermore, we demonstrate that G6PD can physically interact with AMPK (AMPK-activated protein kinase) to facilitate its activity and directly bind to NAMPT (nicotinamide phosphoribosyltransferase) to promote its activity and maintain the NAD(P)H/NAD(P)+ homeostasis. These functions are necessary to the antistress ability of cells but independent of the dehydrogenase activity of G6PD. In addition, the WT G6PD and naturally inactive mutant also can similarly regulate the metabolism of glucose, glutamine, fatty acid synthesis, and GSH and interact with the involved enzymes. Therefore, our findings reveal the previously unidentified functions of G6PD that can act as the important physiological neutralizer of stresses independently of its enzymatic activity.
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Affiliation(s)
- Xiaohan Jin
- Department of Biochemistry and Molecular Biology, Capital Medical University, Beijing, China
| | - Xuexue Li
- Department of Biochemistry and Molecular Biology, Capital Medical University, Beijing, China
| | - Lifang Li
- Department of Cancer Cell Biology and National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - Benfu Zhong
- Department of Cancer Cell Biology and National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - Yang Hong
- Department of Cancer Cell Biology and National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - Jing Niu
- Department of Biochemistry and Molecular Biology, Capital Medical University, Beijing, China,For correspondence: Binghui Li; Jing Niu
| | - Binghui Li
- Department of Biochemistry and Molecular Biology, Capital Medical University, Beijing, China,Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing, China,For correspondence: Binghui Li; Jing Niu
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18
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Glucose 6-P Dehydrogenase—An Antioxidant Enzyme with Regulatory Functions in Skeletal Muscle during Exercise. Cells 2022; 11:cells11193041. [PMID: 36231003 PMCID: PMC9563910 DOI: 10.3390/cells11193041] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/21/2022] [Accepted: 09/23/2022] [Indexed: 11/16/2022] Open
Abstract
Hypomorphic Glucose 6-P dehydrogenase (G6PD) alleles, which cause G6PD deficiency, affect around one in twenty people worldwide. The high incidence of G6PD deficiency may reflect an evolutionary adaptation to the widespread prevalence of malaria, as G6PD-deficient red blood cells (RBCs) are hostile to the malaria parasites that infect humans. Although medical interest in this enzyme deficiency has been mainly focused on RBCs, more recent evidence suggests that there are broader implications for G6PD deficiency in health, including in skeletal muscle diseases. G6PD catalyzes the rate-limiting step in the pentose phosphate pathway (PPP), which provides the precursors of nucleotide synthesis for DNA replication as well as reduced nicotinamide adenine dinucleotide phosphate (NADPH). NADPH is involved in the detoxification of cellular reactive oxygen species (ROS) and de novo lipid synthesis. An association between increased PPP activity and the stimulation of cell growth has been reported in different tissues including the skeletal muscle, liver, and kidney. PPP activity is increased in skeletal muscle during embryogenesis, denervation, ischemia, mechanical overload, the injection of myonecrotic agents, and physical exercise. In fact, the highest relative increase in the activity of skeletal muscle enzymes after one bout of exhaustive exercise is that of G6PD, suggesting that the activation of the PPP occurs in skeletal muscle to provide substrates for muscle repair. The age-associated loss in muscle mass and strength leads to a decrease in G6PD activity and protein content in skeletal muscle. G6PD overexpression in Drosophila Melanogaster and mice protects against metabolic stress, oxidative damage, and age-associated functional decline, and results in an extended median lifespan. This review discusses whether the well-known positive effects of exercise training in skeletal muscle are mediated through an increase in G6PD.
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Xia N, Guo X, Guo Q, Gupta N, Ji N, Shen B, Xiao L, Feng Y. Metabolic flexibilities and vulnerabilities in the pentose phosphate pathway of the zoonotic pathogen Toxoplasma gondii. PLoS Pathog 2022; 18:e1010864. [PMID: 36121870 PMCID: PMC9521846 DOI: 10.1371/journal.ppat.1010864] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 09/29/2022] [Accepted: 09/08/2022] [Indexed: 11/18/2022] Open
Abstract
Metabolic pathways underpin the growth and virulence of intracellular parasites and are therefore promising antiparasitic targets. The pentose phosphate pathway (PPP) is vital in most organisms, providing a reduced form of nicotinamide adenine dinucleotide phosphate (NADPH) and ribose sugar for nucleotide synthesis; however, it has not yet been studied in Toxoplasma gondii, a widespread intracellular pathogen and a model protozoan organism. Herein, we show that T. gondii has a functional PPP distributed in the cytoplasm and nucleus of its acutely-infectious tachyzoite stage. We produced eight parasite mutants disrupting seven enzymes of the PPP in T. gondii. Our data show that of the seven PPP proteins, the two glucose-6-phosphate dehydrogenases (TgG6PDH1, TgG6PDH2), one of the two 6-phosphogluconate dehydrogenases (Tg6PGDH1), ribulose-5-phosphate epimerase (TgRuPE) and transaldolase (TgTAL) are dispensable in vitro as well as in vivo, disclosing substantial metabolic plasticity in T. gondii. Among these, TgG6PDH2 plays a vital role in defense against oxidative stress by the pathogen. Further, we show that Tg6PGDH2 and ribulose-5-phosphate isomerase (TgRPI) are critical for tachyzoite growth. The depletion of TgRPI impairs the flux of glucose in central carbon pathways, and causes decreased expression of ribosomal, microneme and rhoptry proteins. In summary, our results demonstrate the physiological need of the PPP in T. gondii while unraveling metabolic flexibility and antiparasitic targets. Metabolic pathways are intimately associated with the survival and replication of parasitic Toxoplasma gondii and thus represent potential targets for antiparasitic strategies. Herein, we focused on the pentose phosphate pathway (PPP) in T. gondii and examined its roles in supporting the growth of this ubiquitous pathogen. We found that TgG6PDH1 and TgG6PDH2 were needed to defend oxidative stress but not for pentose synthesis. We revealed that inactivation of the Tg6PGDH2 and TgRPI severely impaired the asexual reproduction of tachyzoites. We also highlighted the remarkable metabolic plasticity in tachyzoites that enables them to acquire some of the PPP intermediates from multiple routes. This study provides significant insights into the carbon metabolism properties of Toxoplasma parasites, opening avenues for targeting this pathway to develop therapeutic interventions against toxoplasmosis.
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Affiliation(s)
- Ningbo Xia
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Xuefang Guo
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Qinghong Guo
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Nishith Gupta
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani (Hyderabad Campus), Hyderabad, India
- Department of Molecular Parasitology, Faculty of Life Sciences, Humboldt University, Berlin, Germany
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Nuo Ji
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Bang Shen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- * E-mail: (BS); (LX); (YF)
| | - Lihua Xiao
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- * E-mail: (BS); (LX); (YF)
| | - Yaoyu Feng
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- * E-mail: (BS); (LX); (YF)
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Persad KL, Lopaschuk GD. Energy Metabolism on Mitochondrial Maturation and Its Effects on Cardiomyocyte Cell Fate. Front Cell Dev Biol 2022; 10:886393. [PMID: 35865630 PMCID: PMC9294643 DOI: 10.3389/fcell.2022.886393] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 05/20/2022] [Indexed: 12/12/2022] Open
Abstract
Alterations in energy metabolism play a major role in the lineage of cardiomyocytes, such as the dramatic changes that occur in the transition from neonate to newborn. As cardiomyocytes mature, they shift from a primarily glycolytic state to a mitochondrial oxidative metabolic state. Metabolic intermediates and metabolites may have epigenetic and transcriptional roles in controlling cell fate by increasing mitochondrial biogenesis. In the maturing cardiomyocyte, such as in the postnatal heart, fatty acid oxidation increases in conjunction with increased mitochondrial biogenesis driven by the transcriptional coregulator PGC1-α. PGC1-α is necessary for mitochondrial biogenesis in the heart at birth, with deficiencies leading to postnatal cardiomyopathy. While stem cell therapy as a treatment for heart failure requires further investigation, studies suggest that adult stem cells may secrete cardioprotective factors which may regulate cardiomyocyte differentiation and survival. This review will discuss how metabolism influences mitochondrial biogenesis and how mitochondrial biogenesis influences cell fate, particularly in the context of the developing cardiomyocyte. The implications of energy metabolism on stem cell differentiation into cardiomyocytes and how this may be utilized as a therapy against heart failure and cardiovascular disease will also be discussed.
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Chen PH, Tjong WY, Yang HC, Liu HY, Stern A, Chiu DTY. Glucose-6-Phosphate Dehydrogenase, Redox Homeostasis and Embryogenesis. Int J Mol Sci 2022; 23:ijms23042017. [PMID: 35216131 PMCID: PMC8878822 DOI: 10.3390/ijms23042017] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/04/2022] [Accepted: 02/08/2022] [Indexed: 12/04/2022] Open
Abstract
Normal embryogenesis requires complex regulation and precision, which depends on multiple mechanistic details. Defective embryogenesis can occur by various mechanisms. Maintaining redox homeostasis is of importance during embryogenesis. NADPH, as produced from the action of glucose-6-phosphate dehydrogenase (G6PD), has an important role in redox homeostasis, serving as a cofactor for glutathione reductase in the recycling of glutathione from oxidized glutathione and for NADPH oxidases and nitric oxide synthases in the generation of reactive oxygen (ROS) and nitrogen species (RNS). Oxidative stress differentially influences cell fate and embryogenesis. While low levels of stress (eustress) by ROS and RNS promote cell growth and differentiation, supra-physiological concentrations of ROS and RNS can lead to cell demise and embryonic lethality. G6PD-deficient cells and organisms have been used as models in embryogenesis for determining the role of redox signaling in regulating cell proliferation, differentiation and migration. Embryogenesis is also modulated by anti-oxidant enzymes, transcription factors, microRNAs, growth factors and signaling pathways, which are dependent on redox regulation. Crosstalk among transcription factors, microRNAs and redox signaling is essential for embryogenesis.
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Affiliation(s)
- Po-Hsiang Chen
- Graduate Institute of Health Industry Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan; (P.-H.C.); (W.-Y.T.); (D.T.-Y.C.)
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan
| | - Wen-Ye Tjong
- Graduate Institute of Health Industry Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan; (P.-H.C.); (W.-Y.T.); (D.T.-Y.C.)
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan
| | - Hung-Chi Yang
- Department of Medical Laboratory Science and Biotechnology, Yuanpei University of Medical Technology, Hsinchu 30015, Taiwan
- Correspondence: ; Tel.: +886-3-6108175; Fax: +886-3-6102327
| | - Hui-Ya Liu
- Department of Medical Biotechnology and Laboratory Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan;
| | - Arnold Stern
- Grossman School of Medicine, New York University, New York, NY 10016, USA;
| | - Daniel Tsun-Yee Chiu
- Graduate Institute of Health Industry Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan; (P.-H.C.); (W.-Y.T.); (D.T.-Y.C.)
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22
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Loss of glucose 6-phosphate dehydrogenase function increases oxidative stress and glutaminolysis in metastasizing melanoma cells. Proc Natl Acad Sci U S A 2022; 119:2120617119. [PMID: 35110412 PMCID: PMC8833200 DOI: 10.1073/pnas.2120617119] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/22/2021] [Indexed: 01/02/2023] Open
Abstract
Melanoma metastasis is limited by oxidative stress. Cells that enter the blood experience high levels of reactive oxygen species and usually die of ferroptosis. We found that melanoma cells become more dependent upon the oxidative pentose phosphate pathway to manage oxidative stress during metastasis. When pentose phosphate pathway function was impaired by reduced glucose 6-phosphate dehydrogenase (G6PD) function, melanoma cells increased malic enzyme activity and glutamine consumption. Melanoma cells thus have redundant and layered protection against oxidative stress. The pentose phosphate pathway is a major source of NADPH for oxidative stress resistance in cancer cells but there is limited insight into its role in metastasis, when some cancer cells experience high levels of oxidative stress. To address this, we mutated the substrate binding site of glucose 6-phosphate dehydrogenase (G6PD), which catalyzes the first step of the pentose phosphate pathway, in patient-derived melanomas. G6PD mutant melanomas had significantly decreased G6PD enzymatic activity and depletion of intermediates in the oxidative pentose phosphate pathway. Reduced G6PD function had little effect on the formation of primary subcutaneous tumors, but when these tumors spontaneously metastasized, the frequency of circulating melanoma cells in the blood and metastatic disease burden were significantly reduced. G6PD mutant melanomas exhibited increased levels of reactive oxygen species, decreased NADPH levels, and depleted glutathione as compared to control melanomas. G6PD mutant melanomas compensated for this increase in oxidative stress by increasing malic enzyme activity and glutamine consumption. This generated a new metabolic vulnerability as G6PD mutant melanomas were more dependent upon glutaminase than control melanomas, both for oxidative stress management and anaplerosis. The oxidative pentose phosphate pathway, malic enzyme, and glutaminolysis thus confer layered protection against oxidative stress during metastasis.
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Xia L, Kong X, Song H, Han Q, Zhang S. Advances in proteome-wide analysis of plant lysine acetylation. PLANT COMMUNICATIONS 2022; 3:100266. [PMID: 35059632 PMCID: PMC8760137 DOI: 10.1016/j.xplc.2021.100266] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/21/2021] [Accepted: 11/22/2021] [Indexed: 06/14/2023]
Abstract
Lysine acetylation (LysAc) is a conserved and important post-translational modification (PTM) that plays a key role in plant physiological and metabolic processes. Based on advances in Lys-acetylated protein immunoenrichment and mass-spectrometric technology, LysAc proteomics studies have been performed in many species. Such studies have made substantial contributions to our understanding of plant LysAc, revealing that Lys-acetylated histones and nonhistones are involved in a broad spectrum of plant cellular processes. Here, we present an extensive overview of recent research on plant Lys-acetylproteomes. We provide in-depth insights into the characteristics of plant LysAc modifications and the mechanisms by which LysAc participates in cellular processes and regulates metabolism and physiology during plant growth and development. First, we summarize the characteristics of LysAc, including the properties of Lys-acetylated sites, the motifs that flank Lys-acetylated lysines, and the dynamic alterations in LysAc among different tissues and developmental stages. We also outline a map of Lys-acetylated proteins in the Calvin-Benson cycle and central carbon metabolism-related pathways. We then introduce some examples of the regulation of plant growth, development, and biotic and abiotic stress responses by LysAc. We discuss the interaction between LysAc and Nα-terminal acetylation and the crosstalk between LysAc and other PTMs, including phosphorylation and succinylation. Finally, we propose recommendations for future studies in the field. We conclude that LysAc of proteins plays an important role in the regulation of the plant life cycle.
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Yang Y, Yang Q, Luo S, Zhang Y, Lian C, He H, Zeng J, Zhang G. Comparative Analysis Reveals Novel Changes in Plasma Metabolites and Metabolomic Networks of Infants With Retinopathy of Prematurity. Invest Ophthalmol Vis Sci 2022; 63:28. [PMID: 35060995 PMCID: PMC8787637 DOI: 10.1167/iovs.63.1.28] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Purpose Advances in mass spectrometry have provided new insights into the role of metabolomics in the etiology of several diseases. Studies on retinopathy of prematurity (ROP), for example, overlooked the role of metabolic alterations in disease development. We employed comprehensive metabolic profiling and gold-standard metabolic analysis to explore major metabolites and metabolic pathways, which were significantly affected in early stages of pathogenesis toward ROP. Methods This was a multicenter, retrospective, matched-pair, case-control study. We collected plasma from 57 ROP cases and 57 strictly matched non-ROP controls. Non-targeted ultra-high-performance liquid chromatography-tandem mass spectroscopy (UPLC-MS/MS) was used to detect the metabolites. Machine learning was employed to reveal the most affected metabolites and pathways in ROP development. Results Compared with non-ROP controls, we found a significant metabolic perturbation in the plasma of ROP cases, which featured an increase in the levels of lipids, nucleotides, and carbohydrate metabolites and lower levels of peptides. Machine leaning enabled us to distinguish a cluster of metabolic pathways (glycometabolism, redox homeostasis, lipid metabolism, and arginine pathway) were strongly correlated with the development of ROP. Moreover, the severity of ROP was associated with the levels of creatinine and ribitol; also, overactivity of aerobic glycolysis and lipid metabolism was noted in the metabolic profile of ROP. Conclusions The results suggest a strong correlation between metabolic profiling and retinal neovascularization in ROP pathogenesis. These findings provide an insight into the identification of novel metabolic biomarkers for the diagnosis and prevention of ROP, but the clinical significance requires further validation.
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Affiliation(s)
- Yuhang Yang
- Shenzhen Eye Hospital, Shenzhen Key Ophthalmic Laboratory, The Second Affiliated Hospital of Jinan University, Shenzhen, Guangdong, China
| | - Qian Yang
- UCL Institute of Ophthalmology, University College London, London, United Kingdom
| | - Sisi Luo
- Shenzhen Key Prevention and Control Laboratory of Birth Defects Prevention and Control, Shenzhen Maternal and Child Health Hospital, The Affiliated Hospital of Southern Medical University, Shenzhen, Guangdong, China
| | - Yinsheng Zhang
- School of Management and E-Business, Zhejiang Gongshang University, Hangzhou, Zhejiang, China
| | - Chaohui Lian
- Shenzhen Key Prevention and Control Laboratory of Birth Defects Prevention and Control, Shenzhen Maternal and Child Health Hospital, The Affiliated Hospital of Southern Medical University, Shenzhen, Guangdong, China
| | - Honghui He
- Shenzhen Eye Hospital, Shenzhen Key Ophthalmic Laboratory, The Second Affiliated Hospital of Jinan University, Shenzhen, Guangdong, China
| | - Jian Zeng
- Shenzhen Eye Hospital, Shenzhen Key Ophthalmic Laboratory, The Second Affiliated Hospital of Jinan University, Shenzhen, Guangdong, China
| | - Guoming Zhang
- Shenzhen Eye Hospital, Shenzhen Key Ophthalmic Laboratory, The Second Affiliated Hospital of Jinan University, Shenzhen, Guangdong, China
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Lee HY, Ithnin A, Azma RZ, Othman A, Salvador A, Cheah FC. Glucose-6-Phosphate Dehydrogenase Deficiency and Neonatal Hyperbilirubinemia: Insights on Pathophysiology, Diagnosis, and Gene Variants in Disease Heterogeneity. Front Pediatr 2022; 10:875877. [PMID: 35685917 PMCID: PMC9170901 DOI: 10.3389/fped.2022.875877] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/02/2022] [Indexed: 01/04/2023] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a prevalent condition worldwide and is caused by loss-of-function mutations in the G6PD gene. Individuals with deficiency are more susceptible to oxidative stress which leads to the classical, acute hemolytic anemia (favism). However, G6PD deficiency in newborn infants presents with an increased risk of hyperbilirubinemia, that may rapidly escalate to result in bilirubin induced neurologic dysfunction (BIND). Often with no overt signs of hemolysis, G6PD deficiency in the neonatal period appears to be different in the pathophysiology from favism. This review discusses and compares the mechanistic pathways involved in these two clinical presentations of this enzyme disorder. In contrast to the membrane disruption of red blood cells and Heinz bodies formation in favism, G6PD deficiency causing jaundice is perhaps attributed to the disruption of oxidant-antioxidant balance, impaired recycling of peroxiredoxin 2, thus affecting bilirubin clearance. Screening for G6PD deficiency and close monitoring of affected infants are important aspects in neonatal care to prevent kernicterus, a permanent and devastating neurological damage. WHO recommends screening for G6PD activity of all infants in countries with high prevalence of this deficiency. The traditional fluorescent spot test as a screening tool, although low in cost, misses a significant proportion of cases with moderate deficiency or the partially deficient, heterozygote females. Some newer and emerging laboratory tests and diagnostic methods will be discussed while developments in genomics and proteomics contribute to increasing studies that spatially profile genetic mutations within the protein structure that could predict their functional and structural effects. In this review, several known variants of G6PD are highlighted based on the location of the mutation and amino acid replacement. These could provide insights on why some variants may cause a higher degree of phenotypic severity compared to others. Further studies are needed to elucidate the predisposition of some variants toward certain clinical manifestations, particularly neonatal hyperbilirubinemia, and how some variants increase in severity when co-inherited with other blood- or bilirubin-related genetic disorders.
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Affiliation(s)
- Heng Yang Lee
- Department of Paediatrics, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Cheras, Malaysia
| | - Azlin Ithnin
- Department of Pathology, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Cheras, Malaysia
| | - Raja Zahratul Azma
- Department of Pathology, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Cheras, Malaysia
| | - Ainoon Othman
- Department of Medical Science II, Faculty of Medicine and Health Sciences, Universiti Sains Islam Malaysia, Nilai, Malaysia
| | - Armindo Salvador
- CNC-Centre for Neuroscience Cell Biology, University of Coimbra, Coimbra, Portugal.,Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), University of Coimbra, Coimbra, Portugal.,Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal
| | - Fook Choe Cheah
- Department of Paediatrics, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Cheras, Malaysia
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Idres YA, Tousch D, Cazals G, Lebrun A, Naceri S, Bidel LPR, Poucheret P. A Novel Sesquiterpene Lactone Xanthatin-13-(pyrrolidine-2-carboxylic acid) Isolated from Burdock Leaf Up-Regulates Cells' Oxidative Stress Defense Pathway. Antioxidants (Basel) 2021; 10:antiox10101617. [PMID: 34679753 PMCID: PMC8533074 DOI: 10.3390/antiox10101617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/10/2021] [Accepted: 10/11/2021] [Indexed: 12/18/2022] Open
Abstract
The aim of our study was to identify novel molecules able to induce an adaptative response against oxidative stress during the first stages of metabolic syndrome. A cellular survival in vitro test against H2O2-based test was applied after pretreatment with various natural bitter Asteraceae extracts. This screening revealed potent protection from burdock leaf extract. Using chromatography and LC-MS—RMN, we then isolated and identified an original sesquiterpene lactone bioactive molecule: the Xanthatin-13-(pyrrolidine-2-carboxylic acid) (XPc). A real-time RT-qPCR experiment was carried out on three essential genes involved in oxidative stress protection: GPx, SOD, and G6PD. In presence of XPc, an over-expression of the G6PD gene was recorded, whereas no modification of the two others genes could be observed. A biochemical docking approach demonstrated that XPc had a high probability to directly interact with G6PD at different positions. One of the most probable docking sites corresponds precisely to the binding site of AG1, known to stabilize the G6PD dimeric form and enhance its activity. In conclusion, this novel sesquiterpene lactone XPc might be a promising prophylactic bioactive agent against oxidative stress and inflammation in chronic diseases such as metabolic syndrome or type 2 diabetes.
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Affiliation(s)
- Yanis A. Idres
- UMR 95 Qualisud, University Montpellier, CIRAD, SupAgro Montpellier, 15 Avenue Charles Flahault, BP 14491, CEDEX 5, 34093 Montpellier, France;
- Correspondence: (Y.A.I.); (D.T.); Tel.: +33-658587547 (Y.A.I.); +33-673466032 (D.T.)
| | - Didier Tousch
- UMR 95 Qualisud, University Montpellier, CIRAD, SupAgro Montpellier, 15 Avenue Charles Flahault, BP 14491, CEDEX 5, 34093 Montpellier, France;
- Correspondence: (Y.A.I.); (D.T.); Tel.: +33-658587547 (Y.A.I.); +33-673466032 (D.T.)
| | - Guillaume Cazals
- Laboratoire de Mesure Physique, Université de Montpellier, Place Eugène Bataillon, CEDEX 5, 34093 Montpellier, France; (G.C.); (A.L.)
| | - Aurélien Lebrun
- Laboratoire de Mesure Physique, Université de Montpellier, Place Eugène Bataillon, CEDEX 5, 34093 Montpellier, France; (G.C.); (A.L.)
| | - Sarah Naceri
- Laboratoire de Biologie Fonctionnelle et Adaptative, Université de Paris, CNRS UMR 8251, 35 rue Héléne Brion, 75013 Paris, France;
| | - Luc P. R. Bidel
- INRA, UMR AGAP, CIRAD, SupAgro, 2 Place Pierre Viala, 34060 Montpellier, France;
| | - Patrick Poucheret
- UMR 95 Qualisud, University Montpellier, CIRAD, SupAgro Montpellier, 15 Avenue Charles Flahault, BP 14491, CEDEX 5, 34093 Montpellier, France;
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Irokawa H, Numasaki S, Kato S, Iwai K, Inose-Maruyama A, Ohdate T, Hwang GW, Toyama T, Watanabe T, Kuge S. Comprehensive analyses of the cysteine thiol oxidation of PKM2 reveal the effects of multiple oxidation on cellular oxidative stress response. Biochem J 2021; 478:1453-1470. [PMID: 33749780 DOI: 10.1042/bcj20200897] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 03/15/2021] [Accepted: 03/19/2021] [Indexed: 12/15/2022]
Abstract
Redox regulation of proteins via cysteine residue oxidation is involved in the control of various cellular signal pathways. Pyruvate kinase M2 (PKM2), a rate-limiting enzyme in glycolysis, is critical for the metabolic shift from glycolysis to the pentose phosphate pathway under oxidative stress in cancer cell growth. The PKM2 tetramer is required for optimal pyruvate kinase (PK) activity, whereas the inhibition of inter-subunit interaction of PKM2 induced by Cys358 oxidation has reduced PK activity. In the present study, we identified three oxidation-sensitive cysteine residues (Cys358, Cys423 and Cys424) responsible for four oxidation forms via the thiol oxidant diamide and/or hydrogen peroxide (H2O2). Possibly due to obstruction of the dimer-dimer interface, H2O2-induced sulfenylation (-SOH) and diamide-induced modification at Cys424 inhibited tetramer formation and PK activity. Cys423 is responsible for intermolecular disulfide bonds with heterologous proteins via diamide. Additionally, intramolecular polysulphide linkage (-Sn-, n ≧ 3) between Cys358 and an unidentified PKM2 Cys could be induced by diamide. We observed that cells expressing the oxidation-resistant PKM2 (PKM2C358,424A) produced more intracellular reactive oxygen species (ROS) and exhibited greater sensitivity to ROS-generating reagents and ROS-inducible anti-cancer drugs compared with cells expressing wild-type PKM2. These results highlight the possibility that PKM2 inhibition via Cys358 and Cys424 oxidation contributes to eliminating excess ROS and oxidative stress.
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Affiliation(s)
- Hayato Irokawa
- Department of Microbiology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Satoshi Numasaki
- Department of Microbiology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Shin Kato
- Department of Microbiology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Kenta Iwai
- Department of Microbiology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Atsushi Inose-Maruyama
- Department of Microbiology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Takumi Ohdate
- Department of Microbiology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Gi-Wook Hwang
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Miyagi, Japan
| | - Takashi Toyama
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Miyagi, Japan
| | - Toshihiko Watanabe
- Department of Microbiology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
| | - Shusuke Kuge
- Department of Microbiology, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
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Deng M, Wang J, Li YL, Chen HX, Tai M, Deng L, Che B, Du ZY, Dong CZ, Lin L. The impact of polyphenols extracted from Tricholoma matsutake on UVB-induced photoaging in mouse skin. J Cosmet Dermatol 2021; 21:781-793. [PMID: 33811801 DOI: 10.1111/jocd.14127] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 03/11/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Despite Tricholoma matsutake has been used as natural health products with multiple medicinal properties, detailed information about its polyphenolic composition as sources of anti-photoaging agents remains to be determined. OBJECTIVE To investigate the impact of polyphenols extracted from Tricholoma matsutake (TME) on Ultraviolet B (UVB)-induced skin photoaging. MATERIALS AND METHODS Various factors of oxidative stress and inflammation as well as histological and immunohistochemical analysis in the mouse dorsal skin were determined after UVB radiation. RESULTS Topical administration with TME suppressed the UVB-induced skin thickness, wrinkles and erythema, and increased skin collagen content. Furthermore, TME decreased reactive oxygen species (ROS) level, upregulated glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), catalase (CAT) and glucose-6-phosphate dehydrogenase (G6PDH) activities and inhibited the expression of IL-1, IL-6, IL-8 and TNF-α in mice irradiated with UVB. TME could reduce UVB-induced p38 mitogen-activated protein kinase (p38 MAPK) phosphorylation and effectively inhibited the activity of the transcriptional factor nuclear factor-kappa B (NF-κB), thereby reducing the cyclooxygenase-2 (COX-2) expression, which is an important mediator of inflammatory cascade leading to the inflammatory response. CONCLUSION Our data demonstrated that TME had various beneficial effects on UVB-induced skin photoaging due to its antioxidant and anti-inflammatory activities, and it might be exploited as a promising natural product in skin care, anti-photoaging and the therapeutic intervention of skin disorders related to both oxidative stress and inflammation.
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Affiliation(s)
- Minggao Deng
- The School of Biomedical and Pharmaceutical Engineering, Guangdong University of Technology, Guangzhou, P. R. China
| | - Jing Wang
- The School of Biomedical and Pharmaceutical Engineering, Guangdong University of Technology, Guangzhou, P. R. China
| | - Yong-Liang Li
- The School of Biomedical and Pharmaceutical Engineering, Guangdong University of Technology, Guangzhou, P. R. China
| | - Hui-Xiong Chen
- The School of Biomedical and Pharmaceutical Engineering, Guangdong University of Technology, Guangzhou, P. R. China.,Chemistry of RNA, nucleosides, peptides and heterocycles, CNRS UMR8601, Université Paris Descartes, PRES Sorbonne Paris Cité, UFR Biomédicale, 45 rue des Saints-Pères, Paris Cedex, France
| | - Meiling Tai
- Infinitus (China) Co. Ltd, Guangzhou, P. R. China
| | - Lili Deng
- Infinitus (China) Co. Ltd, Guangzhou, P. R. China
| | - Biao Che
- Infinitus (China) Co. Ltd, Guangzhou, P. R. China
| | - Zhi-Yun Du
- The School of Biomedical and Pharmaceutical Engineering, Guangdong University of Technology, Guangzhou, P. R. China
| | - Chang-Zhi Dong
- The School of Biomedical and Pharmaceutical Engineering, Guangdong University of Technology, Guangzhou, P. R. China.,Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS, 75013, Paris, France
| | - Li Lin
- Foshan Conney Allan Biotechnology Co. Ltd, Foshan, CN, China
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Structural basis for substrate recognition of glucose-6-phosphate dehydrogenase from Kluyveromyces lactis. Biochem Biophys Res Commun 2021; 553:85-91. [PMID: 33765558 DOI: 10.1016/j.bbrc.2021.02.088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 01/16/2023]
Abstract
Glucose-6-phosphate dehydrogenase is the first enzyme in the pentose phosphate pathway. The reaction catalyzed by the enzyme is considered to be the main source of reducing power for nicotinamide adenine dinucleotide phosphate (NADPH) and is a precursor of 5-carbon sugar used by cells. To uncover the structural features of the enzyme, we determined the crystal structures of glucose-6-phosphate dehydrogenase from Kluyveromyces lactis (KlG6PD) in both the apo form and a binary complex with its substrate glucose-6-phosphate. KlG6PD contains a Rossman-like domain for cofactor NADPH binding; it also presents a typical antiparallel β sheet at the C-terminal domain with relatively the same pattern as those of other homologous structures. Moreover, our structural and biochemical analyses revealed that Lys153 contributes significantly to substrate G6P recognition. This study may provide insights into the structural variation and catalytic features of the G6PD enzyme.
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Zhou ZY, Wang L, Wang YS, Dou GR. PFKFB3: A Potential Key to Ocular Angiogenesis. Front Cell Dev Biol 2021; 9:628317. [PMID: 33777937 PMCID: PMC7991106 DOI: 10.3389/fcell.2021.628317] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 02/22/2021] [Indexed: 12/26/2022] Open
Abstract
The current treatment for ocular pathological angiogenesis mainly focuses on anti-VEGF signals. This treatment has been confirmed as effective despite the unfavorable side effects and unsatisfactory efficiency. Recently, endothelial cell metabolism, especially glycolysis, has been attracting attention as a potential treatment by an increasing number of researchers. Emerging evidence has shown that regulation of endothelial glycolysis can influence vessel sprouting. This new evidence has raised the potential for novel treatment targets that have been overlooked for a long time. In this review, we discuss the process of endothelial glycolysis as a promising target and consider regulation of the enzyme 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase as treatment for ocular pathological angiogenesis.
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Affiliation(s)
- Zi-Yi Zhou
- Department of Ophthalmology, Xijing Hospital, Eye Institute of Chinese PLA, Fourth Military Medical University, Xi’an, China
| | - Lin Wang
- Department of Hepatobiliary Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, China
| | - Yu-Sheng Wang
- Department of Ophthalmology, Xijing Hospital, Eye Institute of Chinese PLA, Fourth Military Medical University, Xi’an, China
| | - Guo-Rui Dou
- Department of Ophthalmology, Xijing Hospital, Eye Institute of Chinese PLA, Fourth Military Medical University, Xi’an, China
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31
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Glucose-6-phosphate dehydrogenase deficiency. Blood 2021; 136:1225-1240. [PMID: 32702756 DOI: 10.1182/blood.2019000944] [Citation(s) in RCA: 143] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 12/12/2019] [Indexed: 11/20/2022] Open
Abstract
Glucose 6-phosphate dehydrogenase (G6PD) deficiency is 1 of the commonest human enzymopathies, caused by inherited mutations of the X-linked gene G6PD. G6PD deficiency makes red cells highly vulnerable to oxidative damage, and therefore susceptible to hemolysis. Over 200 G6PD mutations are known: approximately one-half are polymorphic and therefore common in various populations. Some 500 million persons with any of these mutations are mostly asymptomatic throughout their lifetime; however, any of them may develop acute and sometimes very severe hemolytic anemia when triggered by ingestion of fava beans, by any of a number of drugs (for example, primaquine, rasburicase), or, more rarely, by infection. Approximately one-half of the G6PD mutations are instead sporadic: rare patients with these mutations present with chronic nonspherocytic hemolytic anemia. Almost all G6PD mutations are missense mutations, causing amino acid replacements that entail deficiency of G6PD enzyme activity: they compromise the stability of the protein, the catalytic activity is decreased, or a combination of both mechanisms occurs. Thus, genotype-phenotype correlations have been reasonably well clarified in many cases. G6PD deficiency correlates remarkably, in its geographic distribution, with past/present malaria endemicity: indeed, it is a unique example of an X-linked human polymorphism balanced through protection of heterozygotes from malaria mortality. Acute hemolytic anemia can be managed effectively provided it is promptly diagnosed. Reliable diagnostic procedures are available, with point-of-care tests becoming increasingly important where primaquine and its recently introduced analog tafenoquine are required for the elimination of malaria.
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Gbotosho OT, Kapetanaki MG, Kato GJ. The Worst Things in Life are Free: The Role of Free Heme in Sickle Cell Disease. Front Immunol 2021; 11:561917. [PMID: 33584641 PMCID: PMC7873693 DOI: 10.3389/fimmu.2020.561917] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 12/04/2020] [Indexed: 12/15/2022] Open
Abstract
Hemolysis is a pathological feature of several diseases of diverse etiology such as hereditary anemias, malaria, and sepsis. A major complication of hemolysis involves the release of large quantities of hemoglobin into the blood circulation and the subsequent generation of harmful metabolites like labile heme. Protective mechanisms like haptoglobin-hemoglobin and hemopexin-heme binding, and heme oxygenase-1 enzymatic degradation of heme limit the toxicity of the hemolysis-related molecules. The capacity of these protective systems is exceeded in hemolytic diseases, resulting in high residual levels of hemolysis products in the circulation, which pose a great oxidative and proinflammatory risk. Sickle cell disease (SCD) features a prominent hemolytic anemia which impacts the phenotypic variability and disease severity. Not only is circulating heme a potent oxidative molecule, but it can act as an erythrocytic danger-associated molecular pattern (eDAMP) molecule which contributes to a proinflammatory state, promoting sickle complications such as vaso-occlusion and acute lung injury. Exposure to extracellular heme in SCD can also augment the expression of placental growth factor (PlGF) and interleukin-6 (IL-6), with important consequences to enthothelin-1 (ET-1) secretion and pulmonary hypertension, and potentially the development of renal and cardiac dysfunction. This review focuses on heme-induced mechanisms that are implicated in disease pathways, mainly in SCD. A special emphasis is given to heme-induced PlGF and IL-6 related mechanisms and their role in SCD disease progression.
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Affiliation(s)
- Oluwabukola T. Gbotosho
- Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Maria G. Kapetanaki
- Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Gregory J. Kato
- Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
- Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
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Polat IH, Tarrado-Castellarnau M, Bharat R, Perarnau J, Benito A, Cortés R, Sabatier P, Cascante M. Oxidative Pentose Phosphate Pathway Enzyme 6-Phosphogluconate Dehydrogenase Plays a Key Role in Breast Cancer Metabolism. BIOLOGY 2021; 10:85. [PMID: 33498665 PMCID: PMC7911610 DOI: 10.3390/biology10020085] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/18/2021] [Accepted: 01/20/2021] [Indexed: 02/07/2023]
Abstract
The pentose phosphate pathway (PPP) plays an essential role in the metabolism of breast cancer cells for the management of oxidative stress and the synthesis of nucleotides. 6-phosphogluconate dehydrogenase (6PGD) is one of the key enzymes of the oxidative branch of PPP and is involved in nucleotide biosynthesis and redox maintenance status. Here, we aimed to analyze the functional importance of 6PGD in a breast cancer cell model. Inhibition of 6PGD in MCF7 reduced cell proliferation and showed a significant decrease in glucose consumption and an increase in glutamine consumption, resulting in an important alteration in the metabolism of these cells. No difference in reactive oxygen species (ROS) production levels was observed after 6PGD inhibition, indicating that 6PGD, in contrast to glucose 6-phosphate dehydrogenase, is not involved in redox balance. We found that 6PGD inhibition also altered the stem cell characteristics and mammosphere formation capabilities of MCF7 cells, opening new avenues to prevent cancer recurrance after surgery or chemotherapy. Moreover, inhibition of 6PGD via chemical inhibitor S3 resulted in an induction of senescence, which, together with the cell cycle arrest and apoptosis induction, might be orchestrated by p53 activation. Therefore, we postulate 6PGD as a novel therapeutic target to treat breast cancer.
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Affiliation(s)
- Ibrahim H. Polat
- Department of Biochemistry and Molecular Biomedicine and Institute of Biomedicine (IBUB), Faculty of Biology, Universitat de Barcelona, Av Diagonal 643, 08028 Barcelona, Spain; (I.H.P.); (M.T.-C.); (R.B.); (J.P.); (A.B.); (R.C.)
- Equipe Environnement et Prédiction de la Santé des Populations, Laboratoire TIMC (UMR 5525), CHU de Grenoble, Université Grenoble Alpes, 38700 CEDEX La Tronche, France;
- Department of Medicine, Hematology/Oncology, Goethe-University Frankfurt, 60590 Frankfurt, Germany
| | - Míriam Tarrado-Castellarnau
- Department of Biochemistry and Molecular Biomedicine and Institute of Biomedicine (IBUB), Faculty of Biology, Universitat de Barcelona, Av Diagonal 643, 08028 Barcelona, Spain; (I.H.P.); (M.T.-C.); (R.B.); (J.P.); (A.B.); (R.C.)
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Instituto de Salud Carlos III (ISCIII), 28001 Madrid, Spain
| | - Rohit Bharat
- Department of Biochemistry and Molecular Biomedicine and Institute of Biomedicine (IBUB), Faculty of Biology, Universitat de Barcelona, Av Diagonal 643, 08028 Barcelona, Spain; (I.H.P.); (M.T.-C.); (R.B.); (J.P.); (A.B.); (R.C.)
| | - Jordi Perarnau
- Department of Biochemistry and Molecular Biomedicine and Institute of Biomedicine (IBUB), Faculty of Biology, Universitat de Barcelona, Av Diagonal 643, 08028 Barcelona, Spain; (I.H.P.); (M.T.-C.); (R.B.); (J.P.); (A.B.); (R.C.)
| | - Adrian Benito
- Department of Biochemistry and Molecular Biomedicine and Institute of Biomedicine (IBUB), Faculty of Biology, Universitat de Barcelona, Av Diagonal 643, 08028 Barcelona, Spain; (I.H.P.); (M.T.-C.); (R.B.); (J.P.); (A.B.); (R.C.)
- Division of Cancer, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London W12 0NN, UK
| | - Roldán Cortés
- Department of Biochemistry and Molecular Biomedicine and Institute of Biomedicine (IBUB), Faculty of Biology, Universitat de Barcelona, Av Diagonal 643, 08028 Barcelona, Spain; (I.H.P.); (M.T.-C.); (R.B.); (J.P.); (A.B.); (R.C.)
| | - Philippe Sabatier
- Equipe Environnement et Prédiction de la Santé des Populations, Laboratoire TIMC (UMR 5525), CHU de Grenoble, Université Grenoble Alpes, 38700 CEDEX La Tronche, France;
| | - Marta Cascante
- Department of Biochemistry and Molecular Biomedicine and Institute of Biomedicine (IBUB), Faculty of Biology, Universitat de Barcelona, Av Diagonal 643, 08028 Barcelona, Spain; (I.H.P.); (M.T.-C.); (R.B.); (J.P.); (A.B.); (R.C.)
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Instituto de Salud Carlos III (ISCIII), 28001 Madrid, Spain
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Boese AC, Kang S. Mitochondrial metabolism-mediated redox regulation in cancer progression. Redox Biol 2021; 42:101870. [PMID: 33509708 PMCID: PMC8113029 DOI: 10.1016/j.redox.2021.101870] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 12/13/2022] Open
Abstract
Cancer cells display abnormal metabolic activity as a result of activated oncogenes and loss of tumor suppressor genes. The Warburg Effect is a common metabolic feature of cancer that involves a preference for aerobic glycolysis over oxidative phosphorylation to generate ATP and building blocks for biosynthesis. However, emerging evidence indicates that mitochondrial metabolic pathways are also reprogrammed in cancer and play vital roles in bioenergetics, biosynthesis, and managing redox homeostasis. The mitochondria act a central hub for metabolic pathways that generate ATP and building blocks for lipid, nucleic acid and protein biosynthesis. However, mitochondrial respiration is also a leading source of reactive oxygen species that can damage cellular organelles and trigger cell death if levels become too high. In general, cancer cells are reported to have higher levels of reactive oxygen species than their non-cancerous cells of origin, and therefore must employ diverse metabolic strategies to prevent oxidative stress. However, mounting evidence indicates that the metabolic profiles between proliferative and disseminated cancer cells are not the same. In this review, we will examine mitochondrial metabolic pathways, such as glutaminolysis, that proliferative and disseminated cancer cells utilize to control their redox status.
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Affiliation(s)
- Austin C Boese
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Sumin Kang
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, 30322, USA.
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Fujii J, Homma T, Kobayashi S, Warang P, Madkaikar M, Mukherjee MB. Erythrocytes as a preferential target of oxidative stress in blood. Free Radic Res 2021; 55:562-580. [PMID: 33427524 DOI: 10.1080/10715762.2021.1873318] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Red blood cells (RBC) are specifically differentiated to transport oxygen and carbon dioxide in the blood and they lack most organelles, including mitochondria. The autoxidation of hemoglobin constitutes a major source of reactive oxygen species (ROS). Nitric oxide, which is produced by endothelial nitric oxide synthase (NOS3) or via the hemoglobin-mediated conversion of nitrite, interacts with ROS and results in the production of reactive nitrogen oxide species. Herein we present an overview of anemic diseases that are closely related to oxidative damage. Because the compensation of proteins by means of gene expression does not proceed in enucleated cells, antioxidative and redox systems play more important roles in maintaining the homeostasis of RBC against oxidative insult compared to ordinary cells. Defects in hemoglobin and enzymes that are involved in energy production and redox reactions largely trigger oxidative damage to RBC. The results of studies using genetically modified mice suggest that antioxidative enzymes, notably superoxide dismutase 1 and peroxiredoxin 2, play essential roles in coping with oxidative damage in erythroid cells, and their absence limits erythropoiesis, the life-span of RBC and consequently results in the development of anemia. The degeneration of the machinery involved in the proteolytic removal of damaged proteins appears to be associated with hemolytic events. The ubiquitin-proteasome system is the dominant machinery, not only for the proteolytic removal of damaged proteins in erythroid cells but also for the development of erythropoiesis. Hence, despite the fact that it is less abundant in RBC compared to ordinary cells, the aberrant ubiquitin-proteasome system may be associated with the development of anemic diseases via the accumulation of damaged proteins, as typified in sickle cell disease, and impaired erythropoiesis.
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Affiliation(s)
- Junichi Fujii
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - Takujiro Homma
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - Sho Kobayashi
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - Prashant Warang
- ICMR - National Institute of Immunohaematology, Mumbai, India
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Florescu (Gune) IE, Georgescu SE, Dudu A, Balaș M, Voicu S, Grecu I, Dediu L, Dinischiotu A, Costache M. Oxidative Stress and Antioxidant Defense Mechanisms in Response to Starvation and Refeeding in the Intestine of Stellate Sturgeon ( Acipenser stellatus) Juveniles from Aquaculture. Animals (Basel) 2021; 11:ani11010076. [PMID: 33406693 PMCID: PMC7823341 DOI: 10.3390/ani11010076] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/18/2020] [Accepted: 12/30/2020] [Indexed: 11/23/2022] Open
Abstract
Simple Summary The stellate sturgeon (Acipenser stellatus) is a critically endangered species due to multiple causes including human impact, with its valuable roe being used for caviar production. As a consequence, it is intensively raised in aquaculture for both conservation and economical purposes. Food deprivation can occur in both natural and aquaculture environments due to specific conditions that impose food restrictions (such us extreme temperatures, deterioration of water quality, pathological manifestations). The purpose of this study was to investigate the physiological adaptability of stellate sturgeon under two starvation/refeeding regimes. Therefore, the study had two objectives: to assess the effects of an alternative feeding regime on oxidative stress biomarkers and to assess the antioxidant defense mechanisms in juveniles raised in aquaculture. The results showed that the starvation/refeeding regimes induced lipid peroxidation and an enhancement of antioxidant enzymes activities in the intestine of stellate sturgeon juveniles. To conclude, Acipenser stellatus proved to possess a potential to adapt to a starvation/refeeding regime, the most suitable being a 7-day starvation period followed by 21 days of refeeding. This regime could be useful to optimize the feeding practice in aquaculture production in order to increase the profitability of fish farming without affecting the stellate sturgeon juveniles. Abstract Acipenser stellatus is a critically endangered species due to the anthropic influence. It has been intensively captured for decades because of its high economic value, its roe being used in the caviar industry. Therefore, Acipenser stellatus is intensively raised in fish farms for both conservation and economical purposes. Aquaculture aims to optimize the feeding regime of juveniles in order to improve its profitability. The purpose of this study was to investigate if Acipenser stellatus can adapt to a starvation/refeeding regime by assessing the effects of this regime on oxidative stress biomarkers and antioxidant defense mechanisms in juveniles raised under aquaculture conditions. The juveniles were subjected to two regimes: a 7-day starvation period followed by 21 days of refeeding, respectively a 14-day starvation period followed by 21 days of refeeding. The results showed that both starvation/refeeding regimes induced an enhancement of antioxidant enzymes activities in the intestine of the juveniles. The oxidative damage was counteracted at the protein level. However, lipid peroxidation was significantly induced in the intestine of the juveniles subjected to 14/21-day starvation/refeeding regime. The 7/21-day starvation/refeeding regime proved to be more suitable for Acipenser stellatus and therefore, it could be useful to optimize the feeding practice in aquaculture production.
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Affiliation(s)
- Iulia Elena Florescu (Gune)
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (I.E.F.); (A.D.); (M.B.); (S.V.); (A.D.); (M.C.)
| | - Sergiu Emil Georgescu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (I.E.F.); (A.D.); (M.B.); (S.V.); (A.D.); (M.C.)
- Correspondence: or ; Tel.: +40-21-3181575 (ext. 112)
| | - Andreea Dudu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (I.E.F.); (A.D.); (M.B.); (S.V.); (A.D.); (M.C.)
| | - Mihaela Balaș
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (I.E.F.); (A.D.); (M.B.); (S.V.); (A.D.); (M.C.)
| | - Sorina Voicu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (I.E.F.); (A.D.); (M.B.); (S.V.); (A.D.); (M.C.)
| | - Iulia Grecu
- Department of Aquaculture, Environmental Sciences and Cadastre, Faculty of Environmental Science and Biotechnology, “Lower Danube” University of Galați, 800201 Galați, Romania; (I.G.); (L.D.)
| | - Lorena Dediu
- Department of Aquaculture, Environmental Sciences and Cadastre, Faculty of Environmental Science and Biotechnology, “Lower Danube” University of Galați, 800201 Galați, Romania; (I.G.); (L.D.)
| | - Anca Dinischiotu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (I.E.F.); (A.D.); (M.B.); (S.V.); (A.D.); (M.C.)
| | - Marieta Costache
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania; (I.E.F.); (A.D.); (M.B.); (S.V.); (A.D.); (M.C.)
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Stancill JS, Corbett JA. The Role of Thioredoxin/Peroxiredoxin in the β-Cell Defense Against Oxidative Damage. Front Endocrinol (Lausanne) 2021; 12:718235. [PMID: 34557160 PMCID: PMC8453158 DOI: 10.3389/fendo.2021.718235] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 08/19/2021] [Indexed: 02/02/2023] Open
Abstract
Oxidative stress is hypothesized to play a role in pancreatic β-cell damage, potentially contributing to β-cell dysfunction and death in both type 1 and type 2 diabetes. Oxidative stress arises when naturally occurring reactive oxygen species (ROS) are produced at levels that overwhelm the antioxidant capacity of the cell. ROS, including superoxide and hydrogen peroxide, are primarily produced by electron leak during mitochondrial oxidative metabolism. Additionally, peroxynitrite, an oxidant generated by the reaction of superoxide and nitric oxide, may also cause β-cell damage during autoimmune destruction of these cells. β-cells are thought to be susceptible to oxidative damage based on reports that they express low levels of antioxidant enzymes compared to other tissues. Furthermore, markers of oxidative damage are observed in islets from diabetic rodent models and human patients. However, recent studies have demonstrated high expression of various isoforms of peroxiredoxins, thioredoxin, and thioredoxin reductase in β-cells and have provided experimental evidence supporting a role for these enzymes in promoting β-cell function and survival in response to a variety of oxidative stressors. This mini-review will focus on the mechanism by which thioredoxins and peroxiredoxins detoxify ROS and on the protective roles of these enzymes in β-cells. Additionally, we speculate about the role of this antioxidant system in promoting insulin secretion.
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Identification, Characterization, and Stress Responsiveness of Glucose-6-phosphate Dehydrogenase Genes in Highland Barley. PLANTS 2020; 9:plants9121800. [PMID: 33353078 PMCID: PMC7766724 DOI: 10.3390/plants9121800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/08/2020] [Accepted: 12/13/2020] [Indexed: 01/22/2023]
Abstract
G6PDH provides intermediate metabolites and reducing power (nicotinamide adenine dinucleotide phosphate, NADPH) for plant metabolism, and plays a pivotal role in the cellular redox homeostasis. In this study, we cloned five G6PDH genes (HvG6PDH1 to HvG6PDH5) from highland barley and characterized their encoded proteins. Functional analysis of HvG6PDHs in E. coli showed that HvG6PDH1 to HvG6PDH5 encode the functional G6PDH proteins. Subcellular localization and phylogenetic analysis indicated that HvG6PDH2 and HvG6PDH5 are localized in the cytoplasm, while HvG6PDH1, HvG6PDH3, and HvG6PDH4 are plastidic isoforms. Analysis of enzymatic activities and gene expression showed that HvG6PDH1 to HvG6PDH4 are involved in responses to salt and drought stresses. The cytosolic HvG6PDH2 is the major isoform against oxidative stress. HvG6PDH5 may be a house-keeping gene. In addition, HvG6PDH1 to HvG6PDH4 and their encoded enzymes responded to jasmonic acid (JA) and abscisic acid (ABA) treatments, implying that JA and ABA are probably critical regulators of HvG6PDHs (except for HvG6PDH5). Reactive oxygen species analysis showed that inhibition of cytosolic and plastidic G6PDH activities leads to increased H2O2 and O2− contents in highland barley under salt and drought stresses. These results suggest that G6PDH can maintain cellular redox homeostasis and that cytosolic HvG6PDH2 is an irreplaceable isoform against oxidative stress in highland barley.
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Bermúdez‐Muñoz JM, Celaya AM, Hijazo‐Pechero S, Wang J, Serrano M, Varela‐Nieto I. G6PD overexpression protects from oxidative stress and age-related hearing loss. Aging Cell 2020; 19:e13275. [PMID: 33222382 PMCID: PMC7744953 DOI: 10.1111/acel.13275] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 09/03/2020] [Accepted: 10/18/2020] [Indexed: 12/17/2022] Open
Abstract
Aging of the auditory system is associated with the incremental production of reactive oxygen species (ROS) and the accumulation of oxidative damage in macromolecules, which contributes to cellular malfunction, compromises cell viability, and, ultimately, leads to functional decline. Cellular detoxification relies in part on the production of NADPH, which is an important cofactor for major cellular antioxidant systems. NADPH is produced principally by the housekeeping enzyme glucose‐6‐phosphate dehydrogenase (G6PD), which catalyzes the rate‐limiting step in the pentose phosphate pathway. We show here that G6PD transgenic mice (G6PD‐Tg), which show enhanced constitutive G6PD activity and NADPH production along life, have lower auditory thresholds than wild‐type mice during aging, together with preserved inner hair cell (IHC) and outer hair cell (OHC), OHC innervation, and a conserved number of synapses per IHC. Gene expression of antioxidant enzymes was higher in 3‐month‐old G6PD‐Tg mice than in wild‐type counterparts, whereas the levels of pro‐apoptotic proteins were lower. Consequently, nitration of proteins, mitochondrial damage, and TUNEL+ apoptotic cells were all lower in 9‐month‐old G6PD‐Tg than in wild‐type counterparts. Unexpectedly, G6PD overexpression triggered low‐grade inflammation that was effectively resolved in young mice, as shown by the absence of cochlear cellular damage and macrophage infiltration. Our results lead us to propose that NADPH overproduction from an early stage is an efficient mechanism to maintain the balance between the production of ROS and cellular detoxification power along aging and thus prevents hearing loss progression.
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Affiliation(s)
- Jose M. Bermúdez‐Muñoz
- Institute for Biomedical Research “Alberto Sols” (IIBM) Spanish National Research Council‐Autonomous University of Madrid (CSIC‐UAM Madrid Spain
- Rare Diseases Networking Biomedical Research Centre (CIBERER) CIBER Carlos III Institute of Health Madrid Spain
| | - Adelaida M. Celaya
- Institute for Biomedical Research “Alberto Sols” (IIBM) Spanish National Research Council‐Autonomous University of Madrid (CSIC‐UAM Madrid Spain
- Rare Diseases Networking Biomedical Research Centre (CIBERER) CIBER Carlos III Institute of Health Madrid Spain
| | - Sara Hijazo‐Pechero
- Institute for Biomedical Research “Alberto Sols” (IIBM) Spanish National Research Council‐Autonomous University of Madrid (CSIC‐UAM Madrid Spain
| | - Jing Wang
- INSERM ‐ UMR 1051 Institut des Neurosciences de Montpellier Montpellier France
| | - Manuel Serrano
- Institute for Research in Biomedicine (IRB) Barcelona Spain
| | - Isabel Varela‐Nieto
- Institute for Biomedical Research “Alberto Sols” (IIBM) Spanish National Research Council‐Autonomous University of Madrid (CSIC‐UAM Madrid Spain
- Rare Diseases Networking Biomedical Research Centre (CIBERER) CIBER Carlos III Institute of Health Madrid Spain
- Hospital La Paz Institute for Health Research (IdiPAZ) Madrid Spain
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40
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Geng SL, Zhang XS, Xu WH. COXIV and SIRT2-mediated G6PD deacetylation modulate ROS homeostasis to extend pupal lifespan. FEBS J 2020; 288:2436-2453. [PMID: 33058529 DOI: 10.1111/febs.15592] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 09/17/2020] [Accepted: 10/09/2020] [Indexed: 01/03/2023]
Abstract
Previous studies have shown that high physiological levels of reactive oxygen species (ROS) in the brain promote pupal diapause, which extends the pupal lifespan. However, the molecular mechanisms of ROS generation are unclear. In this paper, we found that mitochondrial ROS (mtROS) levels in the brains of Helicoverpa armigera diapause-destined pupae (DP) were higher and that the expression of cytochrome oxidase subunit IV (COXIV) was lower than in NP. In addition, downregulating COXIV caused mitochondrial dysfunction which elevated mtROS levels. Protein kinase A (PKA) was downregulated in DP, which led to the downregulated expression of the mitochondrial transcription factor TFAM. Low TFAM activity failed to promote COXIV expression and resulted in the high ROS levels that induced diapause. In addition, low sirtuin 2 expression suppressed glucose-6-phosphate dehydrogenase (G6PD) deacetylation at K382, which led to reduced G6PD activity and low NADPH levels, thereby maintaining high levels of ROS. Two proteins, COXIV and G6PD, thus play key roles in the elevated accumulation of ROS that induce diapause and extend the pupal lifespan.
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Affiliation(s)
- Shao-Lei Geng
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Xiao-Shuai Zhang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Wei-Hua Xu
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China
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41
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Xu H, Hu L, Liu T, Chen F, Li J, Xu J, Jiang L, Xiang Z, Wang X, Sheng J. Caffeine Targets G6PDH to Disrupt Redox Homeostasis and Inhibit Renal Cell Carcinoma Proliferation. Front Cell Dev Biol 2020; 8:556162. [PMID: 33123534 PMCID: PMC7573228 DOI: 10.3389/fcell.2020.556162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/17/2020] [Indexed: 12/31/2022] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PDH) is the rate-limiting enzyme in the pentose phosphate pathway (PPP) and plays a crucial role in the maintenance of redox homeostasis by producing nicotinamide adenine dinucleotide phosphate (NADPH), the major intracellular reductant. G6PDH has been shown to be a biomarker and potential therapeutic target for renal cell carcinoma (RCC). Here, we report a previously unknown biochemical mechanism through which caffeine, a well-known natural small molecule, regulates G6PDH activity to disrupt cellular redox homeostasis and suppress RCC development and progression. We found that caffeine can inhibit G6PDH enzymatic activity. Mechanistically, caffeine directly binds to G6PDH with high affinity (K D = 0.1923 μM) and competes with the coenzyme NADP+ for G6PDH binding, as demonstrated by the decreased binding affinities of G6PDH for its coenzyme and substrate. Molecular docking studies revealed that caffeine binds to G6PDH at the structural NADP+ binding site, and chemical cross-linking analysis demonstrated that caffeine inhibits the formation of dimeric G6PDH. G6PDH inhibition abrogated the inhibitory effects of caffeine on RCC cell growth. Moreover, inhibition of G6PDH activity by caffeine led to a reduction in the intracellular levels of NADPH and reactive oxygen species (ROS), and altered the expression of redox-related proteins in RCC cells. Accordingly, caffeine could inhibit tumor growth through inhibition of G6PDH activity in vivo. Taken together, these results demonstrated that caffeine can target G6PDH to disrupt redox homeostasis and inhibit RCC tumor growth, and has potential as a therapeutic agent for the treatment of RCC.
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Affiliation(s)
- Huanhuan Xu
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Science, Yunnan Agricultural University, Kunming, China
| | - Lihong Hu
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Titi Liu
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Science, Yunnan Agricultural University, Kunming, China
| | - Fei Chen
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Jin Li
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Jing Xu
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Li Jiang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Zemin Xiang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Food Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Xuanjun Wang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,College of Science, Yunnan Agricultural University, Kunming, China.,State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Kunming, China
| | - Jun Sheng
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming, China.,State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Kunming, China
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42
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Moon SJ, Dong W, Stephanopoulos GN, Sikes HD. Oxidative pentose phosphate pathway and glucose anaplerosis support maintenance of mitochondrial NADPH pool under mitochondrial oxidative stress. Bioeng Transl Med 2020; 5:e10184. [PMID: 33005744 PMCID: PMC7510474 DOI: 10.1002/btm2.10184] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 08/21/2020] [Accepted: 08/21/2020] [Indexed: 12/16/2022] Open
Abstract
Mitochondrial NADPH protects cells against mitochondrial oxidative stress by serving as an electron donor to antioxidant defense systems. However, due to technical challenges, it still remains unknown as to the pool size of mitochondrial NADPH, its dynamics, and NADPH/NADP+ ratio. Here, we have systemically modulated production rates of H2O2 in mitochondria and assessed mitochondrial NADPH metabolism using iNap sensors, 13C glucose isotopic tracers, and a mathematical model. Using sensors, we observed decreases in mitochondrial NADPH caused by excessive generation of mitochondrial H2O2, whereas the cytosolic NADPH was maintained upon perturbation. We further quantified the extent of mitochondrial NADPH/NADP+ based on the mathematical analysis. Utilizing 13C glucose isotopic tracers, we found increased activity in the pentose phosphate pathway (PPP) accompanied small decreases in the mitochondrial NADPH pool, whereas larger decreases induced both PPP activity and glucose anaplerosis. Thus, our integrative and quantitative approach provides insight into mitochondrial NADPH metabolism during mitochondrial oxidative stress.
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Affiliation(s)
- Sun Jin Moon
- Department of Chemical EngineeringMassachusetts Institute of TechnologyCambridgeMassachusettsUSA
| | - Wentao Dong
- Department of Chemical EngineeringMassachusetts Institute of TechnologyCambridgeMassachusettsUSA
| | | | - Hadley D. Sikes
- Department of Chemical EngineeringMassachusetts Institute of TechnologyCambridgeMassachusettsUSA
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43
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Rei Yan SL, Wakasuqui F, Wrenger C. Point-of-care tests for malaria: speeding up the diagnostics at the bedside and challenges in malaria cases detection. Diagn Microbiol Infect Dis 2020; 98:115122. [PMID: 32711185 DOI: 10.1016/j.diagmicrobio.2020.115122] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 06/21/2020] [Accepted: 06/25/2020] [Indexed: 12/18/2022]
Abstract
Malaria remains as one of the major public health problems worldwide. About 228 million cases occurred in 2018 only, with Africa bearing about 93% of the cases. Asymptomatic population carrying the various forms of the parasite Plasmodium in endemic areas plays an important role in the spread of the disease. To tackle this battle, more sensitive and precise detection kits for malaria are crucial to better control the number of new malaria cases. In this review, we not only discuss some of the available approaches to rapidly detect new malaria cases in endemic areas but also shed light on parallel problems that may affect the detection of individuals infected with the parasite, covering kelch 13 mutation, glucose 6-phosphate dehydrogenase deficiency, and hemoglobin disorders. Available approaches for malaria detection covered in this review are focused on point-of-care tests, including portable polymerase chain reaction and aptamers.
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Affiliation(s)
- Sun L Rei Yan
- Department of Parasitology, Institute of Biomedical Sciences at the University of São Paulo, São Paulo, Brazil
| | - Felipe Wakasuqui
- Department of Parasitology, Institute of Biomedical Sciences at the University of São Paulo, São Paulo, Brazil
| | - Carsten Wrenger
- Department of Parasitology, Institute of Biomedical Sciences at the University of São Paulo, São Paulo, Brazil.
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44
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Abstract
Endothelial cell (EC) metabolism is important for health and disease. Metabolic pathways, such as glycolysis, fatty acid oxidation, and amino acid metabolism, determine vasculature formation. These metabolic pathways have different roles in securing the production of energy and biomass and the maintenance of redox homeostasis in vascular migratory tip cells, proliferating stalk cells, and quiescent phalanx cells, respectively. Emerging evidence demonstrates that perturbation of EC metabolism results in EC dysfunction and vascular pathologies. Here, we summarize recent insights into EC metabolic pathways and their deregulation in vascular diseases. We further discuss the therapeutic implications of targeting EC metabolism in various pathologies.
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Affiliation(s)
- Xuri Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China; ,
| | - Anil Kumar
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China; ,
| | - Peter Carmeliet
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China; , .,Laboratory of Angiogenesis and Vascular Metabolism, Department of Oncology, KU Leuven, Leuven B-3000, Belgium.,Laboratory of Angiogenesis and Vascular Metabolism, Center for Cancer Biology, VIB, Leuven B-3000, Belgium
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45
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Demarest TG, Varma VR, Estrada D, Babbar M, Basu S, Mahajan UV, Moaddel R, Croteau DL, Thambisetty M, Mattson MP, Bohr VA. Biological sex and DNA repair deficiency drive Alzheimer's disease via systemic metabolic remodeling and brain mitochondrial dysfunction. Acta Neuropathol 2020; 140:25-47. [PMID: 32333098 DOI: 10.1007/s00401-020-02152-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 03/22/2020] [Accepted: 03/23/2020] [Indexed: 12/14/2022]
Abstract
Alzheimer's disease (AD) is an incurable neurodegenerative disease that is more prevalent in women. The increased risk of AD in women is not well understood. It is well established that there are sex differences in metabolism and that metabolic alterations are an early component of AD. We utilized a cross-species approach to evaluate conserved metabolic alterations in the serum and brain of human AD subjects, two AD mouse models, a human cell line, and two Caenorhabditis elegans AD strains. We found a mitochondrial complex I-specific impairment in cortical synaptic brain mitochondria in female, but not male, AD mice. In the hippocampus, Polβ haploinsufficiency caused synaptic complex I impairment in male and female mice, demonstrating the critical role of DNA repair in mitochondrial function. In non-synaptic, glial-enriched, mitochondria from the cortex and hippocampus, complex II-dependent respiration increased in female, but not male, AD mice. These results suggested a glial upregulation of fatty acid metabolism to compensate for neuronal glucose hypometabolism in AD. Using an unbiased metabolomics approach, we consistently observed evidence of systemic and brain metabolic remodeling with a shift from glucose to lipid metabolism in humans with AD, and in AD mice. We determined that this metabolic shift is necessary for cellular and organismal survival in C. elegans, and human cell culture AD models. We observed sex-specific, systemic, and brain metabolic alterations in humans with AD, and that these metabolite changes significantly correlate with amyloid and tau pathology. Among the most significant metabolite changes was the accumulation of glucose-6-phosphate in AD, an inhibitor of hexokinase and rate-limiting metabolite for the pentose phosphate pathway (PPP). Overall, we identified novel mechanisms of glycolysis inhibition, PPP, and tricarboxylic acid cycle impairment, and a neuroprotective augmentation of lipid metabolism in AD. These findings support a sex-targeted metabolism-modifying strategy to prevent and treat AD.
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Affiliation(s)
- Tyler G Demarest
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA
- Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Vijay R Varma
- Unit of Clinical and Translational Neuroscience, Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Darlene Estrada
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Mansi Babbar
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Sambuddha Basu
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Uma V Mahajan
- Unit of Clinical and Translational Neuroscience, Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Ruin Moaddel
- Laboratory of Clinical Investigation, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Deborah L Croteau
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Madhav Thambisetty
- Unit of Clinical and Translational Neuroscience, Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Mark P Mattson
- Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Vilhelm A Bohr
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD, 21224, USA.
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46
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The New CIC Mutation Associates with Mental Retardation and Severity of Seizure in Turkish Child with a Rare Class I Glucose-6-Phosphate Dehydrogenase Deficiency. J Mol Neurosci 2020; 70:2077-2084. [PMID: 32535712 DOI: 10.1007/s12031-020-01614-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 05/25/2020] [Indexed: 12/12/2022]
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is an X-linked recessive disease that causes acute or chronic hemolytic anemia and potentially leads to severe jaundice in response to oxidative agents. Capicua transcriptional repressor (CIC) is an important gene associated with mental retardation, autosomal dominant 45. Affiliated tissues including skin, brain, bone, and related phenotypes are intellectual disability and seizures. Clinical, biochemical, and whole exome analysis are carried out in a Turkish family. Mutation analysis of G6PD and CIC genes by Sanger sequencing in the whole family was carried out to reveal the effect of these mutations on the patient's clinical outcome. Here, we present the case of epilepsy in an 8-year-old child with a hemizygous variation in G6PD gene and heterozygous mutation in CIC gene, resulting in focal epileptiform activity and hypsarrhythmia in electroencephalography (EEG), seizures, psychomotor retardation, speech impairment, intellectual disability, developmental regression, and learning difficulties. Whole exome sequencing confirmed the diagnosis of X-linked increased susceptibility for hemolytic anemia due to G6PD deficiency and mental retardation type 45 due to CIC variant, which explained the development of epileptic seizures. Considering CIC variant and relevant relation with the severity and course of the disease, G6PD mutations sustained through the family are defined as hereditary. Our findings could represent the importance of variants found in G6PD as well as CIC genes linked to the severity of epilepsy, which was presumed based on the significant changes in protein configuration.
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47
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Cherkas A, Holota S, Mdzinarashvili T, Gabbianelli R, Zarkovic N. Glucose as a Major Antioxidant: When, What for and Why It Fails? Antioxidants (Basel) 2020; 9:antiox9020140. [PMID: 32033390 PMCID: PMC7070274 DOI: 10.3390/antiox9020140] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/01/2020] [Accepted: 02/03/2020] [Indexed: 02/07/2023] Open
Abstract
A human organism depends on stable glucose blood levels in order to maintain its metabolic needs. Glucose is considered to be the most important energy source, and glycolysis is postulated as a backbone pathway. However, when the glucose supply is limited, ketone bodies and amino acids can be used to produce enough ATP. In contrast, for the functioning of the pentose phosphate pathway (PPP) glucose is essential and cannot be substituted by other metabolites. The PPP generates and maintains the levels of nicotinamide adenine dinucleotide phosphate (NADPH) needed for the reduction in oxidized glutathione and protein thiols, the synthesis of lipids and DNA as well as for xenobiotic detoxification, regulatory redox signaling and counteracting infections. The flux of glucose into a PPP—particularly under extreme oxidative and toxic challenges—is critical for survival, whereas the glycolytic pathway is primarily activated when glucose is abundant, and there is lack of NADP+ that is required for the activation of glucose-6 phosphate dehydrogenase. An important role of glycogen stores in resistance to oxidative challenges is discussed. Current evidences explain the disruptive metabolic effects and detrimental health consequences of chronic nutritional carbohydrate overload, and provide new insights into the positive metabolic effects of intermittent fasting, caloric restriction, exercise, and ketogenic diet through modulation of redox homeostasis.
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Affiliation(s)
- Andriy Cherkas
- Department of Internal Medicine # 1, Lviv National Medical University, 79010 Lviv, Ukraine
- Correspondence:
| | - Serhii Holota
- Department of Pharmaceutical, Organic and Bioorganic Chemistry, Lviv National Medical University, 79010 Lviv, Ukraine;
- Department of Organic Chemistry and Pharmacy, Lesya Ukrainka Eastern European National University, 43025 Lutsk, Ukraine
| | - Tamaz Mdzinarashvili
- Institute of Medical and Applied Biophysics, I. Javakhishvili Tbilisi State University, 0128 Tbilisi, Georgia;
| | - Rosita Gabbianelli
- Unit of Molecular Biology, School of Pharmacy, University of Camerino, 62032 Camerino, Italy;
| | - Neven Zarkovic
- Laboratory for Oxidative Stress (LabOS), Institute “Rudjer Boskovic”, HR-10000 Zagreb, Croatia;
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48
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Zhao DC, Li YM, Ma JL, Yi N, Yao ZY, Li YP, Quan Y, Li XN, Xu CL, Qiu Y, Wu LQ. Single-cell RNA sequencing reveals distinct gene expression patterns in glucose metabolism of human preimplantation embryos. Reprod Fertil Dev 2019; 31:237-247. [PMID: 30017025 DOI: 10.1071/rd18178] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 06/19/2018] [Indexed: 12/21/2022] Open
Abstract
Precise regulation of glucose metabolism-related genes is essential for early embryonic development. Although previous research has yielded detailed information on the biochemical processes, little is yet known of the dynamic gene expression profiles in glucose metabolism of preimplantation embryos at a single-cell resolution. In the present study, we performed integrated analysis of single-cell RNA sequencing (scRNA-seq) data of human preimplantation embryos that had been cultured in sequential medium. Different cells in the same embryo have similar gene expression patterns in glucose metabolism. During the switch from the cleavage to morula stage, the expression of glycolysis-related genes, such as glucose transporter genes (solute carrier family 2 (facilitated glucose transporter), member 1 (SLC2A1) and solute carrier family 2 (facilitated glucose transporter), member 3 (SLC2A3) and genes encoding hexokinase, phosphofructokinase, pyruvate kinase and lactate dehydrogenase, is increased. The genes involved in the pentose phosphate pathway are highly expressed at the cleavage stage, generating the reducing power to balance oxidative stress derived from biosynthesis. Expression of the genes involved in the biosynthesis of glycerophospholipids is increased after the morula stage. Nevertheless, the expression of tricarboxylic acid-related genes remains relatively unchanged during the preimplantation stages. In conclusion, we discovered that the gene expression profiles are dynamic according to glucose utilisation in the embryos at different stages, which contributes to our understanding of regulatory mechanisms of glucose metabolism-related genes in human preimplantation embryos.
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Affiliation(s)
- Di-Cheng Zhao
- The State Key Laboratory of Medical Genetics of China, Central South University, 72 Xiangya Road, Changsha, 410008, China
| | - Yu-Mei Li
- The Reproductive Medical Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, China
| | - Jie-Liang Ma
- Translational Center for Stem Cell Research, Tongji Hospital, Department of Regenerative Medicine, Tongji University School of Medicine, 1239 Siping Road, Shanghai 200065, China
| | - Ning Yi
- Translational Center for Stem Cell Research, Tongji Hospital, Department of Regenerative Medicine, Tongji University School of Medicine, 1239 Siping Road, Shanghai 200065, China
| | - Zhong-Yuan Yao
- The State Key Laboratory of Medical Genetics of China, Central South University, 72 Xiangya Road, Changsha, 410008, China
| | - Yan-Ping Li
- The Reproductive Medical Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, China
| | - Yi Quan
- The State Key Laboratory of Medical Genetics of China, Central South University, 72 Xiangya Road, Changsha, 410008, China
| | - Xin-Ning Li
- The State Key Laboratory of Medical Genetics of China, Central South University, 72 Xiangya Road, Changsha, 410008, China
| | - Chang-Long Xu
- The Reproductive Medical Center of Nanning Second People's Hospital, Guangxi Medical University, 13 Dancun Road, Nanning, 530031, China
| | - Ying Qiu
- The Reproductive Medical Center of Nanning Second People's Hospital, Guangxi Medical University, 13 Dancun Road, Nanning, 530031, China
| | - Ling-Qian Wu
- The State Key Laboratory of Medical Genetics of China, Central South University, 72 Xiangya Road, Changsha, 410008, China
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49
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Steyn A, Crowther NJ, Norris SA, Rabionet R, Estivill X, Ramsay M. Epigenetic modification of the pentose phosphate pathway and the IGF-axis in women with gestational diabetes mellitus. Epigenomics 2019; 11:1371-1385. [PMID: 31583916 DOI: 10.2217/epi-2018-0206] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Gestational diabetes mellitus (GDM) has been linked with adverse long-term health outcomes for the fetus and mother. These effects may be mediated by epigenetic modifications. Materials & methods: Genome-wide RNA sequencing was performed in placental tissue and maternal blood in six GDM and six non-GDM pregnancies. Promoter region DNA methylation was examined for selected genes and correlated with gene expression to examine an epigenetic modulator mechanism. Results: Reductions of mRNA expression and increases in promoter methylation were observed for G6PD in GDM women, and for genes encoding IGF-binding proteins in GDM-exposed placenta. Conclusion: GDM involves epigenetic attenuation of G6PD, which may lead to hyperglycemia and oxidative stress, and the IGF-axis, which may modulate fetal macrosomia.
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Affiliation(s)
- Angela Steyn
- Division of Human Genetics, National Health Laboratory Service and the School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa
| | - Nigel J Crowther
- Division of Human Genetics, National Health Laboratory Service and the School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa.,The Department of Chemical Pathology, School of Pathology, University of the Witwatersrand, Johannesburg, Gauteng, South Africa
| | - Shane A Norris
- Developmental Pathways for Health Research Unit, University of the Witwatersrand, Johannesburg, Gauteng, South Africa
| | - Raquel Rabionet
- The Centre for Genomic Regulation, Genes and Diseases Program, Barcelona, Spain
| | - Xavier Estivill
- The Centre for Genomic Regulation, Genes and Diseases Program, Barcelona, Spain
| | - Michèle Ramsay
- Division of Human Genetics, National Health Laboratory Service and the School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa.,The Sydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa
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50
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Szymańska H, Życzko K, Zabolewicz T. Relationship between RNASE1, ANG and RNASE6 gene polymorphism and the values of blood indices in suckling piglets. Acta Vet Hung 2019; 67:385-400. [PMID: 31549540 DOI: 10.1556/004.2019.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The relationship between PcR-restriction fragment length polymorphism in RNASE1 (296 A/G), ANG (149 G/T) and RNASE6 (389 C/T) genes and the values of haematological and biochemical blood indices was analysed in crossbred suckling piglets (n = 473), aged 21 ± 3 days (younger, n = 274) and 35 ± 3 days (older, n = 199), descending from Polish Large White × Polish Landrace sows and Duroc × Pietrain boars. The observed distribution of all genotypes was consistent with the Hardy-Weinberg equilibrium. Anaemia was more common in younger piglets with RNASE1 GA genotype but in the blood of older GA piglets a higher count and percentage of granulocytes were noted. This could be related to the destruction of erythrocytes in younger piglets and enhanced host defence in older ones. ANG gene polymorphism was associated with the severity of iron deficiency in younger piglets. This is supposed to be linked with the different ability to protect immune cells against suppression and degradation during iron deficiency. in older piglets, this mutation differentiated the reactivity of the immune system. Varying levels of iron status and red blood cell indices in RNASE6 genotypes presumably resulted from the coupling of genes involved in iron metabolism and expressed in an age-dependent manner.
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Affiliation(s)
- Hanna Szymańska
- 1Department of Medical Biology, University of Warmia and Mazury, Żolnierska 14C, 10-561 Olsztyn, Poland
| | - Krystyna Życzko
- 2Department of Animal Genetics, University of Warmia and Mazury, olsztyn, Poland
| | - Tadeusz Zabolewicz
- 2Department of Animal Genetics, University of Warmia and Mazury, olsztyn, Poland
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