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Hileman CO, Kalayjian RC, Azzam S, Schlatzer D, Wu K, Tassiopoulos K, Bedimo R, Ellis RJ, Erlandson KM, Kallianpur A, Koletar SL, Landay AL, Palella FJ, Taiwo B, Pallaki M, Hoppel CL. Plasma Citrate and Succinate Are Associated With Neurocognitive Impairment in Older People With HIV. Clin Infect Dis 2021; 73:e765-e772. [PMID: 33564870 DOI: 10.1093/cid/ciab107] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Neurocognitive impairment (NCI) is associated with monocyte activation in people with HIV (PWH). Activated monocytes increase glycolysis, reduce oxidative phosphorylation, and accumulate citrate and succinate, tricarboxylic acid (TCA) cycle metabolites that promote inflammation-this metabolic shift may contribute to NCI and slowed gait speed in PWH. METHODS Plasma citrate and succinate were assayed by liquid chromatography-mass spectrometry from 957 participants upon entry to a multicenter, prospective cohort of older PWH. Logistic, linear, and mixed-effects linear regression models were used to examine associations between entry/baseline TCA cycle metabolites and cross-sectional and longitudinal NCI, neuropsychological test scores (NPZ-4), and gait speed. RESULTS Median age was 51 (range 40-78) years. Each 1 standard deviation (SD) citrate increment was associated with 1.18 higher odds of prevalent NCI at baseline (P = .03), 0.07 SD lower time-updated NPZ-4 score (P = .01), and 0.02 m/s slower time-updated gait speed (P < .0001). Age accentuated these effects. In the oldest age-quartile, higher citrate was associated with 1.64 higher odds of prevalent NCI, 0.17 SD lower NPZ-4, and 0.04 m/s slower gait speed (P ≤ .01 for each). Similar associations were apparent with succinate in the oldest age-quintile, but not with gait speed. In participants without NCI at entry, higher citrate predicted a faster rate of neurocognitive decline. CONCLUSIONS Higher plasma citrate and succinate are associated with worse cross-sectional and longitudinal measures of neurocognitive function and gait speed that are age-dependent, supporting the importance of altered bioenergetic metabolism in the pathogenesis of NCI in older PWH.
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Affiliation(s)
- Corrilynn O Hileman
- Department of Medicine, Division of Infectious Diseases, MetroHealth Medical Center and Case Western Reserve School of Medicine, Cleveland, Ohio, USA
| | - Robert C Kalayjian
- Department of Medicine, Division of Infectious Diseases, MetroHealth Medical Center and Case Western Reserve School of Medicine, Cleveland, Ohio, USA
| | - Sausan Azzam
- Department of Nutrition, Proteomics and Small Molecule Mass Spectrometry, Case Western Reserve School of Medicine, Cleveland, Ohio, USA
| | - Daniela Schlatzer
- Department of Nutrition, Proteomics and Small Molecule Mass Spectrometry, Case Western Reserve School of Medicine, Cleveland, Ohio, USA
| | - Kunling Wu
- Center for Biostatistics in AIDS Research, Harvard T. H. Chan School of Public Health, Boston, Massachussets, USA
| | - Katherine Tassiopoulos
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, Massachussets, USA
| | - Roger Bedimo
- Infectious Diseases Section, VA North Texas Health Care System, Dallas, Texas, USA
| | - Ronald J Ellis
- Department of Neurosciences, Psychiatry and Medicine, University of California, San Diego, California, USA
| | - Kristine M Erlandson
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Columbus, USA
| | - Asha Kallianpur
- Genomic Medicine Institute, Cleveland Clinic Lerner Research Institute, Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA
| | - Susan L Koletar
- Department of Medicine, The Ohio State University Medical Center, Columbus, Ohio, USA
| | - Alan L Landay
- Department of Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA
| | - Frank J Palella
- Department of Medicine, Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Babafemi Taiwo
- Department of Medicine, Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Muralidhar Pallaki
- Department of Medicine Louis Stokes Cleveland VA Medical Center and Case Western Reserve School of Medicine, Cleveland, Ohio, USA
| | - Charles L Hoppel
- Center for Mitochondrial Disease and Department of Pharmacology, Case Western Reserve University and Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
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Liang Y, Chen Y, Li L, Zhang S, Xiao J, Wei D. Krebs Cycle Rewired: Driver of Atherosclerosis Progression? Curr Med Chem 2021; 29:2322-2333. [PMID: 34365937 DOI: 10.2174/0929867328666210806105246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 06/16/2021] [Accepted: 06/19/2021] [Indexed: 11/22/2022]
Abstract
The tricarboxylic acid (TCA) cycle is the center of energy metabolism in eukaryotic cells and dynamically adjusted according to energy needs of cells. Macrophages are activated by inflammatory stimuli, and then two breakpoints in TCA cycle lead to the accumulation of intermediates. Atherosclerosis is a chronic inflammatory process. Here, the "non-metabolic" signaling functions of TCA cycle intermediates in the macrophage under inflammatory stimulation and the role of intermediates in the progression of atherosclerosis were discussed.
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Affiliation(s)
- Yamin Liang
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Hengyang Medical College, University of South China, Hengyang, Hunan 421001. China
| | - Yanmei Chen
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Hengyang Medical College, University of South China, Hengyang, Hunan 421001. China
| | - Lu Li
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Hengyang Medical College, University of South China, Hengyang, Hunan 421001. China
| | - Shulei Zhang
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Hengyang Medical College, University of South China, Hengyang, Hunan 421001. China
| | - Jinyan Xiao
- YueYang Maternal-Child Medicine Health Hospital Hunan, Province Innovative Training Base for Medical Postgraduates, University of China South China and Yueyang Women & Children's Medical Center, Yueyang, Hunan, 414000. China
| | - Dangheng Wei
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Hunan International Scientific and Technological Cooperation Base of Arteriosclerotic Disease, Hengyang Medical College, University of South China, Hengyang, Hunan 421001. China
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Man MY, Mohamad MS, Choon YW, Ismail MA. In silico gene knockout prediction using a hybrid of Bat algorithm and minimization of metabolic adjustment. J Integr Bioinform 2021; 18:jib-2020-0037. [PMID: 34348418 PMCID: PMC8573224 DOI: 10.1515/jib-2020-0037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 06/21/2021] [Indexed: 11/17/2022] Open
Abstract
Microorganisms commonly produce many high-demand industrial products like fuels, food, vitamins, and other chemicals. Microbial strains are the strains of microorganisms, which can be optimized to improve their technological properties through metabolic engineering. Metabolic engineering is the process of overcoming cellular regulation in order to achieve a desired product or to generate a new product that the host cells do not usually need to produce. The prediction of genetic manipulations such as gene knockout is part of metabolic engineering. Gene knockout can be used to optimize the microbial strains, such as to maximize the production rate of chemicals of interest. Metabolic and genetic engineering is important in producing the chemicals of interest as, without them, the product yields of many microorganisms are normally low. As a result, the aim of this paper is to propose a combination of the Bat algorithm and the minimization of metabolic adjustment (BATMOMA) to predict which genes to knock out in order to increase the succinate and lactate production rates in Escherichia coli (E. coli).
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Affiliation(s)
- Mei Yen Man
- School of Computing, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
| | - Mohd Saberi Mohamad
- Department of Genetics and Genomics, College of Medical and Health Sciences, United Arab Emirates University, Al Ain17666, Abu Dhabi, United Arab Emirates
| | - Yee Wen Choon
- Institute for Artificial Intelligence and Big Data, Universiti Malaysia Kelantan, Kota Bharu 16100, Kelantan, Malaysia; and Department of Data Science, Universiti Malaysia Kelantan, Kota Bharu 16100, Kelantan, Malaysia
| | - Mohd Arfian Ismail
- Faculty of Computing (FKOM), College of Computing and Applied Sciences, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia
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104
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An YA, Chen S, Deng Y, Wang ZV, Funcke JB, Shah M, Shan B, Gordillo R, Yoshino J, Klein S, Kusminski CM, Scherer PE. The mitochondrial dicarboxylate carrier prevents hepatic lipotoxicity by inhibiting white adipocyte lipolysis. J Hepatol 2021; 75:387-399. [PMID: 33746082 PMCID: PMC8292187 DOI: 10.1016/j.jhep.2021.03.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 01/25/2021] [Accepted: 03/02/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS We have previously reported that the mitochondrial dicarboxylate carrier (mDIC [SLC25A10]) is predominantly expressed in the white adipose tissue (WAT) and subject to regulation by metabolic cues. However, the specific physiological functions of mDIC and the reasons for its abundant presence in adipocytes are poorly understood. METHODS To systemically investigate the impact of mDIC function in adipocytes in vivo, we generated loss- and gain-of-function mouse models, selectively eliminating or overexpressing mDIC in mature adipocytes, respectively. RESULTS In in vitro differentiated white adipocytes, mDIC is responsible for succinate transport from the mitochondrial matrix to the cytosol, from where succinate can act on the succinate receptor SUCNR1 and inhibit lipolysis by dampening the cAMP- phosphorylated hormone-sensitive lipase (pHSL) pathway. We eliminated mDIC expression in adipocytes in a doxycycline (dox)-inducible manner (mDICiKO) and demonstrated that such a deletion results in enhanced adipocyte lipolysis and promotes high-fat diet (HFD)-induced adipocyte dysfunction, liver lipotoxicity, and systemic insulin resistance. Conversely, in a mouse model with dox-inducible, adipocyte-specific overexpression of mDIC (mDICiOE), we observed suppression of adipocyte lipolysis both in vivo and ex vivo. mDICiOE mice are potently protected from liver lipotoxicity upon HFD feeding. Furthermore, they show resistance to HFD-induced weight gain and adipose tissue expansion with concomitant improvements in glucose tolerance and insulin sensitivity. Beyond our data in rodents, we found that human WAT SLC25A10 mRNA levels are positively correlated with insulin sensitivity and negatively correlated with intrahepatic triglyceride levels, suggesting a critical role of mDIC in regulating overall metabolic homeostasis in humans as well. CONCLUSIONS In summary, we highlight that mDIC plays an essential role in governing adipocyte lipolysis and preventing liver lipotoxicity in response to a HFD. LAY SUMMARY Dysfunctional fat tissue plays an important role in the development of fatty liver disease and liver injury. Our present study identifies a mitochondrial transporter, mDIC, which tightly controls the release of free fatty acids from adipocytes to the liver through the export of succinate from mitochondria. We believe this mDIC-succinate axis could be targeted for the treatment of fatty liver disease.
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Affiliation(s)
- Yu A. An
- Touchstone Diabetes Center, Department of Internal Medicine
| | - Shiuhwei Chen
- Touchstone Diabetes Center, Department of Internal Medicine
| | - Yingfeng Deng
- Touchstone Diabetes Center, Department of Internal Medicine
| | - Zhao V. Wang
- Division of Cardiology, Department of Internal Medicine
| | | | - Manasi Shah
- Division of Endocrinology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Bo Shan
- Touchstone Diabetes Center, Department of Internal Medicine
| | - Ruth Gordillo
- Touchstone Diabetes Center, Department of Internal Medicine
| | - Jun Yoshino
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Samuel Klein
- Center for Human Nutrition, Washington University School of Medicine, St. Louis, Missouri, USA
| | | | - Philipp E. Scherer
- Touchstone Diabetes Center, Department of Internal Medicine,Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, TX, USA,Correspondence should be addressed to: Dr. Philipp E. Scherer, Touchstone Diabetes Center, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA; Tel: 214-6488715; Fax: 214-648-8720;
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105
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Riquelme SA, Prince A. Pseudomonas aeruginosa Consumption of Airway Metabolites Promotes Lung Infection. Pathogens 2021; 10:957. [PMID: 34451421 DOI: 10.3390/pathogens10080957] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 12/03/2022] Open
Abstract
Prevailing dogma indicates that the lung of cystic fibrosis (CF) individuals is infected by multiple pathogens due to the abundant accumulation of mucus, which traps most of inhaled organisms. However, this hypothesis does not explain how specific opportunists, like Pseudomonas aeruginosa, are selected in the CF lung to cause chronic disease. This strongly suggests that other factors than mucus are accrued in the human airway and might predispose to bacterial disease, especially by P. aeruginosa. In this review we discuss the role of macrophage metabolites, like succinate and itaconate, in P. aeruginosa pneumonia. We analyze how dysfunction of the CF transmembrane conductance regulator (CFTR) favors release of these metabolites into the infected airway, and how P. aeruginosa exploits these elements to induce transcriptomic and metabolic changes that increase its capacity to cause intractable disease. We describe the host and pathogen pathways associated with succinate and itaconate catabolism, mechanisms of bacterial adaptation to these determinants, and suggest how both experimental settings and future therapies should consider macrophage metabolites abundance to better study P. aeruginosa pathogenesis.
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106
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Maurer J, Hoene M, Weigert C. Signals from the Circle: Tricarboxylic Acid Cycle Intermediates as Myometabokines. Metabolites 2021; 11:474. [PMID: 34436415 DOI: 10.3390/metabo11080474] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/19/2021] [Accepted: 07/20/2021] [Indexed: 12/15/2022] Open
Abstract
Regular physical activity is an effective strategy to prevent and ameliorate aging-associated diseases. In particular, training increases muscle performance and improves whole-body metabolism. Since exercise affects the whole organism, it has countless health benefits. The systemic effects of exercise can, in part, be explained by communication between the contracting skeletal muscle and other organs and cell types. While small proteins and peptides known as myokines are the most prominent candidates to mediate this tissue cross-talk, recent investigations have paid increasing attention to metabolites. The purpose of this review is to highlight the potential role of tricarboxylic acid (TCA) metabolites as humoral mediators of exercise adaptation processes. We focus on TCA metabolites that are released from human skeletal muscle in response to exercise and provide an overview of their potential auto-, para- or endocrine health-promoting effects.
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107
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O'Callaghan AA, Dempsey E, Iyer N, Stiegeler S, Mercurio K, Corr SC. Intestinal Metabolites Influence Macrophage Phagocytosis and Clearance of Bacterial Infection. Front Cell Infect Microbiol 2021; 11:622491. [PMID: 34350128 PMCID: PMC8327167 DOI: 10.3389/fcimb.2021.622491] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 06/30/2021] [Indexed: 11/20/2022] Open
Abstract
The metabolite-rich environment that is the intestinal lumen contains metabolic by-products deriving from microbial fermentation and host cell metabolism, with resident macrophages being constantly exposed to this metabolic flux. Succinate, lactate and itaconate are three metabolites secreted by primed macrophages due to a fragmented tri-carboxylic acid (TCA) cycle. Additionally, succinate and lactate are known by-products of microbial fermentation. How these metabolites impact biological functioning of resident macrophages particularly in response to bacterial infection remains poorly understood. We have investigated the potential influence of these metabolites on macrophage phagocytosis and clearance of Escherichia coli (E. coli) infection. Treatment of murine bone-marrow-derived macrophages (BMDMs) with succinate reduced numbers of intracellular E. coli early during infection, while lactate-treated BMDMs displayed no difference throughout the course of infection. Treatment of BMDMs with itaconate lead to higher levels of intracellular E. coli early in the infection with bacterial burden subsequently reduced at later time-points compared to untreated macrophages, indicative of enhanced engulfment and killing capabilities of macrophages in response to itaconate. Expression of engulfment mediators MARCKS, RhoB, and CDC42 were reduced or unchanged following succinate or lactate treatment and increased in itaconate-treated macrophages following E. coli infection. Nitric oxide (NO) levels varied while pro- and anti-inflammatory cytokines differed in secretory levels in all metabolite-treated macrophages post-infection with E. coli or in response to lipopolysaccharide (LPS) stimulation. Finally, the basal phenotypic profile of metabolite-treated macrophages was altered according to marker gene expression, describing how fluid macrophage phenotype can be in response to the microenvironment. Collectively, our data suggests that microbe- and host-derived metabolites can drive distinct macrophage functional phenotypes in response to infection, whereby succinate and itaconate regulate phagocytosis and bactericidal mechanisms, limiting the intracellular bacterial niche and impeding the pathogenesis of infection.
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Affiliation(s)
- Amy A O'Callaghan
- Department of Microbiology, Moyne Institute of Preventative Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin, Ireland
| | - Elaine Dempsey
- Department of Microbiology, Moyne Institute of Preventative Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin, Ireland
| | - Namrata Iyer
- Department of Microbiology, Moyne Institute of Preventative Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Sarah Stiegeler
- Department of Microbiology, Moyne Institute of Preventative Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin, Ireland
| | - Kevin Mercurio
- Department of Microbiology, Moyne Institute of Preventative Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin, Ireland
| | - Sinéad C Corr
- Department of Microbiology, Moyne Institute of Preventative Medicine, School of Genetics and Microbiology, Trinity College Dublin, Dublin, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
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108
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Kim HJ, Jeong H, Lee SJ. Visualization and Quantification of Genetically Adapted Microbial Cells During Preculture. Front Microbiol 2021; 12:693464. [PMID: 34335520 PMCID: PMC8317463 DOI: 10.3389/fmicb.2021.693464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 06/14/2021] [Indexed: 11/13/2022] Open
Abstract
As culture history is known to affect the length of the lag phase and microbial cell growth, precultures are often grown in the same medium as the main culture for physiological adaptation and to reduce a prolonged lag time in some microbial cells. To understand the adaptation process of microbial cells during transfer from Luria-Bertani medium to minimal medium, we used the growth of Escherichia coli BL21(DE3) in succinate minimal medium as a model system. We observed that only one or two sequential transfers from minimal medium to fresh minimal medium accelerated the growth rate of BL21(DE3) cells. In addition, the number of large colonies (diameter ≥0.1 cm) on succinate agar increased with the number of transfers. Genome and transcript analyses showed that the C-to-T point mutation in large colony cells converted the inactive promoter of kgtP (known to encode α-ketoglutarate permease) to the active form, allowing efficient uptake of exogenous succinate. Moreover, we visualized the occurrence of genetically adapted cells with better fitness in real time and quantified the number of those cells in the microbial population during transfer to the same medium. Fluorescence microscopy showed the occurrence and increase of adapted mutant cells, which contain intracellular KgtP-fused green fluorescent proteins, as a result of the C-to-T mutation in the promoter of a fused kgtP-sfgfp during transfer to fresh medium. Flow cytometry revealed that the proportion of mutant cells increased from 1.75% (first transfer) to 12.16% (second transfer) and finally 70.79% (third transfer), explaining the shortened lag time and accelerated growth rate of BL21(DE3) cells during adaptation to the minimal medium. This study provides new insights into the genetic heterogeneity of microbial populations that aids microbial adaptability in new environments.
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Affiliation(s)
- Hyun Ju Kim
- Department of Systems Biotechnology, Institute of Microbiomics, Chung-Ang University, Anseong, South Korea
| | - Haeyoung Jeong
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea
| | - Sang Jun Lee
- Department of Systems Biotechnology, Institute of Microbiomics, Chung-Ang University, Anseong, South Korea
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Bharwad K, Ghoghari N, Rajkumar S. Crc Regulates Succinate-Mediated Repression of Mineral Phosphate Solubilization in Acinetobacter sp. SK2 by Modulating Membrane Glucose Dehydrogenase. Front Microbiol 2021; 12:641119. [PMID: 34322095 PMCID: PMC8312277 DOI: 10.3389/fmicb.2021.641119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 04/30/2021] [Indexed: 11/13/2022] Open
Abstract
The plant growth-promoting Acinetobacter sp. SK2 isolated from Vigna radiata rhizosphere was characterized for mineral phosphate solubilization (MPS). To understand the contribution of the membrane glucose dehydrogenase (mGDH) and soluble glucose dehydrogenase (sGDH) in glucose oxidation and MPS, insertional inactivation of the corresponding genes was carried out. The disruption of mGDH encoding gene gdhA resulted in complete loss of mGDH activity, which confirmed its role in periplasmic glucose oxidation and gluconate-mediated MPS phenotype. The inactivation of sGDH encoding gene gdhB resulted in loss of sGDH activity, which did not alter the MPS or mGDH activity. Thus, it was also concluded that the sGDH was dispensable in gluconate-mediated MPS. Supplementation of succinate in glucose-containing medium suppressed the activity of mGDH (and sGDH) and therefore repressed the MPS phenotype. The catabolite repression control protein (Crc) of Pseudomonas was implicated in Acinetobacter sp. for a similar function in the presence of preferred and non-preferred carbon sources. To understand the regulatory linkage between Crc and genes for glucose oxidation, crc mutants were generated. The inactivation of crc resulted in increased activity of the mGDH in glucose + succinate-grown cells, indicating derepression. An increase in phosphate solubilization up to 44% in glucose + succinate-grown crc - compared with glucose-grown cells was recorded, which was significantly repressed in the wild-type strain under similar conditions. It is therefore proposed that in Acinetobacter sp. SK2, Crc is involved in the succinate-provoked repression of the MPS phenotype. The gene expression data indicated that Hfq may also have a regulating role in preferential utilization of carbon source by perhaps modulating Crc-Hfq functionality. V. radiata plants inoculated with the wild type improved both root and shoot length by 1.3 to 1.4-fold. However, crc - increased the root and shoot length by 1.6-fold, compared with the uninoculated controls. In mimicking the soil condition (in the presence of multiple carbon sources, e.g., succinate along with glucose), the crc - strain of Acinetobacter sp. SK2 performed better in supporting the growth of V. radiata in pot experiments.
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110
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Dahl HA, Johansen A, Nilsson GE, Lefevre S. The Metabolomic Response of Crucian Carp ( Carassius carassius) to Anoxia and Reoxygenation Differs between Tissues and Hints at Uncharacterized Survival Strategies. Metabolites 2021; 11:435. [PMID: 34357329 PMCID: PMC8304758 DOI: 10.3390/metabo11070435] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/16/2021] [Accepted: 06/25/2021] [Indexed: 01/15/2023] Open
Abstract
The anoxia-tolerant crucian carp (Carassius carassius) has been studied in detail for numerous years, with particular focus on unravelling the underlying physiological mechanisms of anoxia tolerance. However, relatively little work has been focused on what occurs beyond anoxia, and often the focus is a single organ or tissue type. In this study, we quantified more than 100 metabolites by capillary electrophoresis-mass spectrometry (CE-MS) in brain, heart, liver, and blood plasma from four experimental groups, being normoxic (control) fish, anoxia-exposed fish, and two groups that had been exposed to anoxia followed by reoxygenation for either 3 h or 24 h. The heart, which maintains cardiac output during anoxia, unexpectedly, was slower to recover compared to the brain and liver, mainly due to a slower return to control concentrations of the energy-carrying compounds ATP, GTP, and phosphocreatine. Crucian carp accumulated amino acids in most tissues, and also surprisingly high levels of succinate in all tissues investigated during anoxia. Purine catabolism was enhanced, leading to accumulation of uric acid during anoxia and increasing urea formation that continued into 24 h of reoxygenation. These tissue-specific differences in accumulation and distribution of the metabolites may indicate an intricate system of transport between tissues, opening for new avenues of investigation of possible mechanisms aimed at reducing the generation of reactive oxygen species (ROS) and resultant tissue damage during reoxygenation.
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Affiliation(s)
| | | | | | - Sjannie Lefevre
- Section for Physiology and Cell Biology, Department of Biosciences, University of Oslo, 0371 Oslo, Norway; (H.-A.D.); (A.J.); (G.E.N.)
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111
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Wyvekens N, Anderson WJ, Kim YX, Carter M, Hirsch MS. Low-Grade Fumarate Hydratase-Deficient Renal Cell Carcinoma in a 30-Year-Old Female. Int J Surg Pathol 2021; 30:184-189. [PMID: 34180725 DOI: 10.1177/10668969211026241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Fumarate hydratase (FH)-deficient renal cell carcinoma (RCC) is a rare and clinically aggressive RCC subtype that is commonly associated with the hereditary leiomyomatosis and renal cell carcinoma syndrome. The diagnostic hallmark of FH-deficient RCC is a high-grade microscopic appearance with prominent inclusion-like eosinophilic nucleoli and perinucleolar halos. Herein we report a case of an FH-deficient RCC in a 30-year-old female that exhibited low-grade nuclei and abundant eosinophilic cytoplasm, reminiscent of the clinically more indolent succinate dehydrogenase-deficient RCC subtype and the newly described eintity, eosinophilic, solid and cystic RCC. This case illustrates that FH-deficient RCC can have a wide spectrum of microscopic appearances, including low-grade eosinophilic RCC. In addition, it highlights that a low threshold to perform the immunohistochemical stains for FH and S-(2-succino) cysteine is warranted in RCC cases with unusual and even low-grade eosinophilic morphology.
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Affiliation(s)
- Nicolas Wyvekens
- 1861Brigham and Women's Hospital and 1811Harvard Medical School, Boston, MA, USA
| | - William J Anderson
- 1861Brigham and Women's Hospital and 1811Harvard Medical School, Boston, MA, USA
| | - Young X Kim
- 6470Kaiser Foundation Hospital, 158530Southern California Permanente Medical Group, Baldwin Park, CA, USA
| | - Mark Carter
- 6470Kaiser Foundation Hospital, 158530Southern California Permanente Medical Group, Baldwin Park, CA, USA
| | - Michelle S Hirsch
- 1861Brigham and Women's Hospital and 1811Harvard Medical School, Boston, MA, USA
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Staňková P, Kučera O, Peterová E, Elkalaf M, Rychtrmoc D, Melek J, Podhola M, Zubáňová V, Červinková Z. Western Diet Decreases the Liver Mitochondrial Oxidative Flux of Succinate: Insight from a Murine NAFLD Model. Int J Mol Sci 2021; 22:6908. [PMID: 34199098 DOI: 10.3390/ijms22136908] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/20/2021] [Accepted: 06/23/2021] [Indexed: 12/12/2022] Open
Abstract
Mitochondria play an essential role in the pathogenesis of nonalcoholic fatty liver disease (NAFLD). Previously, we found that succinate-activated respiration was the most affected mitochondrial parameter in mice with mild NAFLD. In this study, we focused on the role of succinate dehydrogenase (SDH) in NAFLD pathogenesis. To induce the progression of NAFLD to nonalcoholic steatohepatitis (NASH), C57BL/6J mice were fed a Western-style diet (WD) or control diet for 30 weeks. NAFLD severity was evaluated histologically and the expression of selected proteins and genes was assessed. Mitochondrial respiration was measured by high-resolution respirometry. Liver redox status was assessed using glutathione, malondialdehyde, and mitochondrial production of reactive oxygen species (ROS). Metabolomic analysis was performed by GC/MS. WD consumption for 30 weeks led to reduced succinate-activated respiration. We also observed decreased SDH activity, decreased expression of the SDH activator sirtuin 3, decreased gene expression of SDH subunits, and increased levels of hepatic succinate, an important signaling molecule. Succinate receptor 1 (SUCNR1) gene and protein expression were reduced in the livers of WD-fed mice. We did not observe signs of oxidative damage compared to the control group. The changes observed in WD-fed mice appear to be adaptive to prevent mitochondrial respiratory chain overload and massive ROS production.
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113
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O'Leary CE, Feng X, Cortez VS, Locksley RM, Schneider C. Interrogating the Small Intestine Tuft Cell-ILC2 Circuit Using In Vivo Manipulations. Curr Protoc 2021; 1:e77. [PMID: 33740294 DOI: 10.1002/cpz1.77] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Recent findings position tuft cells as key mediators of intestinal immunity through their production of the cytokine interleukin (IL)-25 and activation of group 2 innate lymphoid cells (ILC2s). Though tuft cells are found in numerous epithelial tissues, their phenotype and function have been best characterized in the small intestine, where robust in vivo techniques have enabled the dissection of their cellular function, ontogeny, and key signaling pathways. We describe methods for the identification, quantification, and manipulation of tuft cells, focusing on analysis of ILC2s as a readout of tuft cell function. © 2021 Wiley Periodicals LLC. Basic Protocol 1: Ex vivo analysis of small intestinal tuft cells and ILC2 by flow cytometry Alternate Protocol: Ex vivo analysis of small intestinal tuft cells and ILC2 by flow cytometry in the context of type 2 inflammation Basic Protocol 2: Ex vivo analysis of small intestinal tuft cells by imaging of intestinal Swiss roll Basic Protocol 3: Tuft-ILC2 circuit activation by oral gavage of adult Nippostrongylus brasiliensis worms Basic Protocol 4: Circuit activation by colonization with Tritrichomonas spp. Basic Protocol 5: Circuit activation by treatment with succinate in drinking water Basic Protocol 6: Circuit activation by treatment with recombinant IL-25.
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Affiliation(s)
- Claire E O'Leary
- Department of Medicine, University of California, San Francisco, San Francisco, California
| | - Xiaogang Feng
- Institute of Physiology, University of Zurich, Zurich, Switzerland
| | - Victor S Cortez
- Department of Medicine, University of California, San Francisco, San Francisco, California
| | - Richard M Locksley
- Department of Medicine, University of California, San Francisco, San Francisco, California.,Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, California.,Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, California
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114
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Beyoğlu D, Idle JR. Metabolic Rewiring and the Characterization of Oncometabolites. Cancers (Basel) 2021; 13:2900. [PMID: 34200553 DOI: 10.3390/cancers13122900] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 05/31/2021] [Accepted: 06/08/2021] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Oncometabolites are produced by cancer cells and assist the cancer to proliferate and progress. Oncometabolites occur as a result of mutated enzymes in the tumor tissue or due to hypoxia. These processes result in either the abnormal buildup of a normal metabolite or the accumulation of an unusual metabolite. Definition of the metabolic changes that occur due to these processes has been accomplished using metabolomics, which mainly uses mass spectrometry platforms to define the content of small metabolites that occur in cells, tissues, organs and organisms. The four classical oncometabolites are fumarate, succinate, (2R)-hydroxyglutarate and (2S)-hydroxyglutarate, which operate by inhibiting 2-oxoglutarate-dependent enzyme reactions that principally regulate gene expression and response to hypoxia. Metabolomics has also revealed several putative oncometabolites that include lactate, kynurenine, methylglyoxal, sarcosine, glycine, hypotaurine and (2R,3S)-dihydroxybutanoate. Metabolomics will continue to be critical for understanding the metabolic rewiring involving oncometabolite production that underpins many cancer phenotypes. Abstract The study of low-molecular-weight metabolites that exist in cells and organisms is known as metabolomics and is often conducted using mass spectrometry laboratory platforms. Definition of oncometabolites in the context of the metabolic phenotype of cancer cells has been accomplished through metabolomics. Oncometabolites result from mutations in cancer cell genes or from hypoxia-driven enzyme promiscuity. As a result, normal metabolites accumulate in cancer cells to unusually high concentrations or, alternatively, unusual metabolites are produced. The typical oncometabolites fumarate, succinate, (2R)-hydroxyglutarate and (2S)-hydroxyglutarate inhibit 2-oxoglutarate-dependent dioxygenases, such as histone demethylases and HIF prolyl-4-hydroxylases, together with DNA cytosine demethylases. As a result of the cancer cell acquiring this new metabolic phenotype, major changes in gene transcription occur and the modification of the epigenetic landscape of the cell promotes proliferation and progression of cancers. Stabilization of HIF1α through inhibition of HIF prolyl-4-hydroxylases by oncometabolites such as fumarate and succinate leads to a pseudohypoxic state that promotes inflammation, angiogenesis and metastasis. Metabolomics has additionally been employed to define the metabolic phenotype of cancer cells and patient biofluids in the search for cancer biomarkers. These efforts have led to the uncovering of the putative oncometabolites sarcosine, glycine, lactate, kynurenine, methylglyoxal, hypotaurine and (2R,3S)-dihydroxybutanoate, for which further research is required.
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Abstract
Increasing evidence points to the respiratory Complex II (CII) as a source and modulator of reactive oxygen species (ROS). Both functional loss of CII as well as its pharmacological inhibition can lead to ROS generation in cells, with a relevant impact on the development of pathophysiological conditions, i.e. cancer and neurodegenerative diseases. While the basic framework of CII involvement in ROS production has been defined, the fine details still await clarification. It is important to resolve these aspects to fully understand the role of CII in pathology and to explore its therapeutic potential in cancer and other diseases.
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Affiliation(s)
| | - Michal Kraus
- Institute of Biotechnology of the Czech Academy of Sciences, Prague-West, Czech Republic
| | - Jiri Neuzil
- Institute of Biotechnology of the Czech Academy of Sciences, Prague-West, Czech Republic.,School of Medical Science, Griffith University, Southport, Qld, Australia
| | - Jakub Rohlena
- Institute of Biotechnology of the Czech Academy of Sciences, Prague-West, Czech Republic
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116
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Tenhaef N, Kappelmann J, Eich A, Weiske M, Brieß L, Brüsseler C, Marienhagen J, Wiechert W, Noack S. Microaerobic growth-decoupled production of α-ketoglutarate and succinate from xylose in a one-pot process using Corynebacterium glutamicum. Biotechnol J 2021; 16:e2100043. [PMID: 34089621 DOI: 10.1002/biot.202100043] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Lignocellulosic biomass is the most abundant raw material on earth. Its efficient use for novel bio-based materials is essential for an emerging bioeconomy. Possible building blocks for such materials are the key TCA-cycle intermediates α-ketoglutarate and succinate. These organic acids have a wide range of potential applications, particularly in use as monomers for established or novel biopolymers. Recently, Corynebacterium glutamicum was successfully engineered and evolved towards an improved utilization of d-xylose via the Weimberg pathway, yielding the strain WMB2evo . The Weimberg pathway enables a carbon-efficient C5-to-C5 conversion of d-xylose to α-ketoglutarate and a shortcut route to succinate as co-product in a one-pot process. METHODS AND RESULTS C. glutamicum WMB2evo was grown under dynamic microaerobic conditions on d-xylose, leading to the formation of comparably high amounts of succinate and only small amounts of α-ketoglutarate. Subsequent carbon isotope labeling experiments verified the targeted production route for both products in C. glutamicum WMB2evo . Fed-batch process development was initiated and the effect of oxygen supply and feeding strategy for a growth-decoupled co-production of α-ketoglutarate and succinate were studied in detail. The finally established fed-batch production process resulted in the formation of 78.4 mmol L-1 (11.45 g L-1 ) α-ketoglutarate and 96.2 mmol L-1 (11.36 g L-1 ) succinate. CONCLUSION The developed one-pot process represents a promising approach for the combined supply of bio-based α-ketoglutarate and succinate. Future work will focus on tailor-made down-stream processing of both organic acids from the fermentation broth to enable their application as building blocks in chemical syntheses. Alternatively, direct conversion of one or both acids via whole-cell or cell-free enzymatic approaches can be envisioned; thus, extending the network of value chains starting from cheap and renewable d-xylose.
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Affiliation(s)
- Niklas Tenhaef
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Jannick Kappelmann
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Currenta GmbH & Co. OHG, Leverkusen, Germany
| | - Arabel Eich
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Marc Weiske
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Lisette Brieß
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Christian Brüsseler
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Jan Marienhagen
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany.,Institute of Biotechnology, RWTH Aachen University, Aachen, Germany
| | - Wolfgang Wiechert
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany.,Computational Systems Biotechnology (AVT.CSB), RWTH Aachen University, Aachen, Germany
| | - Stephan Noack
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany
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Bisbach CM, Hass DT, Robbings BM, Rountree AM, Sadilek M, Sweet IR, Hurley JB. Succinate Can Shuttle Reducing Power from the Hypoxic Retina to the O 2-Rich Pigment Epithelium. Cell Rep 2021; 31:107606. [PMID: 32375026 DOI: 10.1016/j.celrep.2020.107606] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 02/21/2020] [Accepted: 04/10/2020] [Indexed: 12/19/2022] Open
Abstract
When O2 is plentiful, the mitochondrial electron transport chain uses it as a terminal electron acceptor. However, the mammalian retina thrives in a hypoxic niche in the eye. We find that mitochondria in retinas adapt to their hypoxic environment by reversing the succinate dehydrogenase reaction to use fumarate to accept electrons instead of O2. Reverse succinate dehydrogenase activity produces succinate and is enhanced by hypoxia-induced downregulation of cytochrome oxidase. Retinas can export the succinate they produce to the neighboring O2-rich retinal pigment epithelium-choroid complex. There, succinate enhances O2 consumption by severalfold. Malate made from succinate in the pigment epithelium can then be imported into the retina, where it is converted to fumarate to again accept electrons in the reverse succinate dehydrogenase reaction. This malate-succinate shuttle can sustain these two tissues by transferring reducing power from an O2-poor tissue (retina) to an O2-rich one (retinal pigment epithelium-choroid).
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Affiliation(s)
- Celia M Bisbach
- Department of Biochemistry, University of Washington, Seattle, WA 98195, USA
| | - Daniel T Hass
- Department of Biochemistry, University of Washington, Seattle, WA 98195, USA
| | - Brian M Robbings
- Department of Biochemistry, University of Washington, Seattle, WA 98195, USA; UW Diabetes Institute, University of Washington, Seattle, WA 98195, USA
| | - Austin M Rountree
- UW Diabetes Institute, University of Washington, Seattle, WA 98195, USA
| | - Martin Sadilek
- Department of Chemistry, University of Washington, Seattle, WA 98195, USA
| | - Ian R Sweet
- UW Diabetes Institute, University of Washington, Seattle, WA 98195, USA
| | - James B Hurley
- Department of Biochemistry, University of Washington, Seattle, WA 98195, USA; Department of Ophthalmology, University of Washington, Seattle, WA 98195, USA.
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118
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Trauelsen M, Hiron TK, Lin D, Petersen JE, Breton B, Husted AS, Hjorth SA, Inoue A, Frimurer TM, Bouvier M, O'Callaghan CA, Schwartz TW. Extracellular succinate hyperpolarizes M2 macrophages through SUCNR1/GPR91-mediated Gq signaling. Cell Rep 2021; 35:109246. [PMID: 34133934 DOI: 10.1016/j.celrep.2021.109246] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/31/2021] [Accepted: 05/20/2021] [Indexed: 12/13/2022] Open
Abstract
Succinate functions both as a classical TCA cycle metabolite and an extracellular metabolic stress signal sensed by the mainly Gi-coupled succinate receptor SUCNR1. In the present study, we characterize and compare effects and signaling pathways activated by succinate and both classes of non-metabolite SUCNR1 agonists. By use of specific receptor and pathway inhibitors, rescue in G-protein-depleted cells and monitoring of receptor G protein activation by BRET, we identify Gq rather than Gi signaling to be responsible for SUCNR1-mediated effects on basic transcriptional regulation. Importantly, in primary human M2 macrophages, in which SUCNR1 is highly expressed, we demonstrate that physiological concentrations of extracellular succinate act through SUCNR1-activated Gq signaling to efficiently regulate transcription of immune function genes in a manner that hyperpolarizes their M2 versus M1 phenotype. Thus, sensing of stress-induced extracellular succinate by SUCNR1 is an important transcriptional regulator in human M2 macrophages through Gq signaling.
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Affiliation(s)
- Mette Trauelsen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Maersk Tower, 2200 Copenhagen, Denmark
| | - Thomas K Hiron
- Wellcome Trust Centre for Human Genetics and NIHR Oxford Biomedical Research Centre, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7BN, UK
| | - Da Lin
- Wellcome Trust Centre for Human Genetics and NIHR Oxford Biomedical Research Centre, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7BN, UK
| | - Jacob E Petersen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Maersk Tower, 2200 Copenhagen, Denmark
| | - Billy Breton
- Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Anna Sofie Husted
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Maersk Tower, 2200 Copenhagen, Denmark
| | - Siv A Hjorth
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Maersk Tower, 2200 Copenhagen, Denmark
| | - Asuka Inoue
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Thomas M Frimurer
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Maersk Tower, 2200 Copenhagen, Denmark
| | - Michel Bouvier
- Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Chris A O'Callaghan
- Wellcome Trust Centre for Human Genetics and NIHR Oxford Biomedical Research Centre, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7BN, UK
| | - Thue W Schwartz
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, Maersk Tower, 2200 Copenhagen, Denmark.
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119
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Liu QY, Zhuang Y, Song XR, Niu Q, Sun QS, Li XN, Li N, Liu BL, Huang F, Qiu ZX. Tanshinone IIA prevents LPS-induced inflammatory responses in mice via inactivation of succinate dehydrogenase in macrophages. Acta Pharmacol Sin 2021; 42:987-997. [PMID: 33028985 PMCID: PMC8149828 DOI: 10.1038/s41401-020-00535-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 09/10/2020] [Indexed: 12/12/2022] Open
Abstract
Metabolic reprogramming is associated with NLRP3 inflammasome activation in activated macrophages, contributing to inflammatory responses. Tanshinone IIA (Tan-IIA) is a major constituent from Salvia miltiorrhiza Bunge, which exhibits anti-inflammatory activity. In this study, we investigated the effects of Tan-IIA on inflammation in macrophages in focus on its regulation of metabolism and redox state. In lipopolysaccharides (LPS)-stimulated mouse bone marrow-derived macrophages (BMDMs), Tan-IIA (10 μM) significantly decreased succinate-boosted IL-1β and IL-6 production, accompanied by upregulation of IL-1RA and IL-10 release via inhibiting succinate dehydrogenase (SDH). Tan-IIA concentration dependently inhibited SDH activity with an estimated IC50 of 4.47 μM in LPS-activated BMDMs. Tan-IIA decreased succinate accumulation, suppressed mitochondrial reactive oxygen species production, thus preventing hypoxia-inducible factor-1α (HIF-1α) induction. Consequently, Tan-IIA reduced glycolysis and protected the activity of Sirtuin2 (Sirt2), an NAD+-dependent protein deacetylase, by raising the ratio of NAD+/NADH in activated macrophages. The acetylation of α-tubulin was required for the assembly of NLRP3 inflammasome; Tan-IIA increased the binding of Sirt2 to α-tubulin, and thus reduced the acetylation of α-tubulin, thus impairing this process. Sirt2 knockdown or application of Sirt2 inhibitor AGK-2 (10 μM) neutralized the effects of Tan-IIA, suggesting that Tan-IIA inactivated NLRP3 inflammasome in a manner dependent on Sirt2 regulation. The anti-inflammatory effects of Tan-IIA were observed in mice subjected to LPS challenge: pre-administration of Tan-IIA (20 mg/kg, ip) significantly attenuated LPS-induced acute inflammatory responses, characterized by elevated IL-1β but reduced IL-10 levels in serum. The peritoneal macrophages isolated from the mice displayed similar metabolic regulation. In conclusion, Tan-IIA reduces HIF-1α induction via SDH inactivation, and preserves Sirt2 activity via downregulation of glycolysis, contributing to suppression of NLRP3 inflammasome activation. This study provides a new insight into the anti-inflammatory action of Tan-IIA from the respect of metabolic and redox regulation.
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Affiliation(s)
- Qiu-Yan Liu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Yu Zhuang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Xian-Rui Song
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Qun Niu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Qiu-Shuang Sun
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Xiao-Nan Li
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Ning Li
- National Experimental Teaching Demonstration Center of Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Bao-Lin Liu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Fang Huang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China.
| | - Zhi-Xia Qiu
- School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, China.
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Abstract
Reprogramming of the mitochondrial electron transport chain (ETC) is the most important physiological mechanism that provides short- and long-term adaptation to hypoxia. The possibilities of additional pharmacological regulation of ETC activity are of considerable practical interest in correcting hypoxia-associated disorders. This review considers the main groups of antihypoxic compounds that exhibit their effect at the interface of ETC and the cycle of tricarboxylic acids, including succinate-containing and succinate-forming antihypoxants. The role of succinate during adaptation to hypoxia, the biological activity of the succinate, and its potentially adverse effects are currently not fully understood and require further clarification.
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Affiliation(s)
- V A Prikhodko
- St. Petersburg State Chemical Pharmaceutical University, St. Petersburg, Russia
| | - N O Selizarova
- St. Petersburg State Chemical Pharmaceutical University, St. Petersburg, Russia
| | - S V Okovityi
- St. Petersburg State Chemical Pharmaceutical University, St. Petersburg, Russia
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121
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Swiderska A, Coney AM, Alzahrani AA, Aldossary HS, Batis N, Ray CJ, Kumar P, Holmes AP. Mitochondrial Succinate Metabolism and Reactive Oxygen Species Are Important but Not Essential for Eliciting Carotid Body and Ventilatory Responses to Hypoxia in the Rat. Antioxidants (Basel) 2021; 10:840. [PMID: 34070267 DOI: 10.3390/antiox10060840] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/18/2021] [Accepted: 05/21/2021] [Indexed: 01/31/2023] Open
Abstract
Reflex increases in breathing in response to acute hypoxia are dependent on activation of the carotid body (CB)—A specialised peripheral chemoreceptor. Central to CB O2-sensing is their unique mitochondria but the link between mitochondrial inhibition and cellular stimulation is unresolved. The objective of this study was to evaluate if ex vivo intact CB nerve activity and in vivo whole body ventilatory responses to hypoxia were modified by alterations in succinate metabolism and mitochondrial ROS (mitoROS) generation in the rat. Application of diethyl succinate (DESucc) caused concentration-dependent increases in chemoafferent frequency measuring approximately 10–30% of that induced by severe hypoxia. Inhibition of mitochondrial succinate metabolism by dimethyl malonate (DMM) evoked basal excitation and attenuated the rise in chemoafferent activity in hypoxia. However, approximately 50% of the response to hypoxia was preserved. MitoTEMPO (MitoT) and 10-(6′-plastoquinonyl) decyltriphenylphosphonium (SKQ1) (mitochondrial antioxidants) decreased chemoafferent activity in hypoxia by approximately 20–50%. In awake animals, MitoT and SKQ1 attenuated the rise in respiratory frequency during hypoxia, and SKQ1 also significantly blunted the overall hypoxic ventilatory response (HVR) by approximately 20%. Thus, whilst the data support a role for succinate and mitoROS in CB and whole body O2-sensing in the rat, they are not the sole mediators. Treatment of the CB with mitochondrial selective antioxidants may offer a new approach for treating CB-related cardiovascular–respiratory disorders.
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122
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Yang DX, Yang H, Cao YC, Jiang M, Zheng J, Peng B. Succinate Promotes Phagocytosis of Monocytes/Macrophages in Teleost Fish. Front Mol Biosci 2021; 8:644957. [PMID: 33937328 PMCID: PMC8082191 DOI: 10.3389/fmolb.2021.644957] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/26/2021] [Indexed: 12/14/2022] Open
Abstract
Development of immunity-based strategy to manage bacterial infection is urgently needed in aquaculture due to the widespread of antibiotic-resistant bacteria. Phagocytosis serves as the first line defense in innate immunity that engulfs bacteria and restricts their proliferations and invasions. However, the mechanism underlying the regulation of phagocytosis is not fully elucidated and the way to boost phagocytosis is not yet explored. In this manuscript, we profiled the metabolomes of monocytes/macrophages isolated from Nile tilapia, prior and after phagocytosis on Vibrio alginolyticus. Monocytes/macrophages showed a metabolic shift following phagocytosis. Interestingly, succinate was accumulated after phagocytosis and was identified as a crucial biomarker to distinguish before and after phagocytosis. Exogenous succinate increased the phagocytotic rate of monocytes/macrophages in a dose-dependent manner. This effect was dependent on the TCA cycle as the inhibitor of malonate that targets succinate dehydrogenase abrogated the effect. Meanwhile, exogenous succinate regulated the expression of genes associated with innate immune and phagocytosis. In addition, succinate-potentiated phagocytosis was applicable to both gram-negative and -positive cells, including V. alginolyticus, Edwardsiella tarda, Streptococcus agalactiae, and Streptococcus iniae. Our study shed light on the understanding of how modulation on host's metabolism regulates immune response, and this can be a potent therapeutic approach to control bacterial infections in aquaculture.
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Affiliation(s)
- Dai-Xiao Yang
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Hao Yang
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Yun-Chao Cao
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Ming Jiang
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Jun Zheng
- Faculty of Health Sciences, University of Macau, Macau, China
| | - Bo Peng
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
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Hersch SJ, Radan B, Ilyas B, Lavoie P, Navarre WW. A stress-induced block in dicarboxylate uptake and utilization in Salmonella. J Bacteriol 2021; 203:JB. [PMID: 33593945 DOI: 10.1128/JB.00487-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacteria have evolved to sense and respond to their environment by altering gene expression and metabolism to promote growth and survival. In this work we demonstrate that Salmonella displays an extensive (>30 hour) lag in growth when subcultured into media where dicarboxylates such as succinate are the sole carbon source. This growth lag is regulated in part by RpoS, the RssB anti-adaptor IraP, translation elongation factor P, and to a lesser degree the stringent response. We also show that small amounts of proline or citrate can trigger early growth in succinate media and that, at least for proline, this effect requires the multifunctional enzyme/regulator PutA. We demonstrate that activation of RpoS results in the repression of dctA, encoding the primary dicarboxylate importer, and that constitutive expression of dctA induced growth. This dicarboxylate growth lag phenotype is far more severe across multiple Salmonella isolates than in its close relative E. coli Replacing 200 nt of the Salmonella dctA promoter region with that of E. coli was sufficient to eliminate the observed lag in growth. We hypothesized that this cis-regulatory divergence might be an adaptation to Salmonella's virulent lifestyle where levels of phagocyte-produced succinate increase in response to bacterial LPS, however we found that impairing dctA repression had no effect on Salmonella's survival in acidified succinate or in macrophages.Importance Bacteria have evolved to sense and respond to their environment to maximize their chance of survival. By studying differences in the responses of pathogenic bacteria and closely related non-pathogens, we can gain insight into what environments they encounter inside of an infected host. Here we demonstrate that Salmonella diverges from its close relative E. coli in its response to dicarboxylates such as the metabolite succinate. We show that this is regulated by stress response proteins and ultimately can be attributed to Salmonella repressing its import of dicarboxylates. Understanding this phenomenon may reveal a novel aspect of the Salmonella virulence cycle, and our characterization of its regulation yields a number of mutant strains that can be used to further study it.
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Abstract
Hypoxia is a typical pathological process characterized by the occurrence of oxygen deficiency in tissues and cells and accompanied by the development of immediate and delayed compensatory and adaptive reactions. Reprogramming of the mitochondrial electron transport chain (ETC) function is one the most essential regulatory mechanisms that allow for immediate adaptation to hypoxia. Succinic acid, or succinate, is involved in this process not only as one of the intermediates of the tricarboxylic acid (TAC) cycle, but also as a signaling molecule. In this connection, the purpose of this review was to systematize the available data on the molecular mechanisms for the development of hypoxia and its adaptation at the ETC/TAC coupling site, as well as on the role of succinic acid in these processes.
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Affiliation(s)
- V A Prikhodko
- Saint Petersburg State Chemical and Pharmaceutical University of the Ministry of Health of the Russian Federation, Saint Petersburg, Russia
| | - N O Selizarova
- Saint Petersburg State Chemical and Pharmaceutical University of the Ministry of Health of the Russian Federation, Saint Petersburg, Russia
| | - S V Okovityi
- Saint Petersburg State Chemical and Pharmaceutical University of the Ministry of Health of the Russian Federation, Saint Petersburg, Russia
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Sant’Anna-Silva ACB, Perez-Valencia JA, Sciacovelli M, Lalou C, Sarlak S, Tronci L, Nikitopoulou E, Meszaros AT, Frezza C, Rossignol R, Gnaiger E, Klocker H. Succinate Anaplerosis Has an Onco-Driving Potential in Prostate Cancer Cells. Cancers (Basel) 2021; 13:cancers13071727. [PMID: 33917317 PMCID: PMC8038717 DOI: 10.3390/cancers13071727] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/23/2021] [Accepted: 04/02/2021] [Indexed: 12/29/2022] Open
Abstract
Simple Summary Depending on the availability of nutrients and increased metabolic demands, tumor cells rearrange their metabolism to survive and, ultimately, proliferate. Here, the authors investigated the effect of succinate, a metabolite of the mitochondrial citric acid cycle, on malignant and non-malignant prostate cells. They analyzed uptake through membrane transporters and intracellular accumulation, which subsequently fuels metabolism and enhances oncogenic properties of the tumor cells. The findings shed light to the metabolic adaptations that prostate tumor cells undergo, providing a better understanding of metabolic rewiring and strategies for therapeutic intervention. Abstract Tumor cells display metabolic alterations when compared to non-transformed cells. These characteristics are crucial for tumor development, maintenance and survival providing energy supplies and molecular precursors. Anaplerosis is the property of replenishing the TCA cycle, the hub of carbon metabolism, participating in the biosynthesis of precursors for building blocks or signaling molecules. In advanced prostate cancer, an upshift of succinate-driven oxidative phosphorylation via mitochondrial Complex II was reported. Here, using untargeted metabolomics, we found succinate accumulation mainly in malignant cells and an anaplerotic effect contributing to biosynthesis, amino acid, and carbon metabolism. Succinate also stimulated oxygen consumption. Malignant prostate cells displayed higher mitochondrial affinity for succinate when compared to non-malignant prostate cells and the succinate-driven accumulation of metabolites induced expression of mitochondrial complex subunits and their activities. Moreover, extracellular succinate stimulated migration, invasion, and colony formation. Several enzymes linked to accumulated metabolites in the malignant cells were found upregulated in tumor tissue datasets, particularly NME1 and SHMT2 mRNA expression. High expression of the two genes was associated with shorter disease-free survival in prostate cancer cohorts. Moreover, in-vitro expression of both genes was enhanced in prostate cancer cells upon succinate stimulation. In conclusion, the data indicate that uptake of succinate from the tumor environment has an anaplerotic effect that enhances the malignant potential of prostate cancer cells.
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Affiliation(s)
- Ana Carolina B. Sant’Anna-Silva
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Medical University Innsbruck, 6020 Innsbruck, Austria; (A.T.M.); (E.G.)
- Oroboros Instruments GmbH, 6020 Innsbruck, Austria
- Correspondence: (A.C.B.S.-S.); (H.K.)
| | | | - Marco Sciacovelli
- Medical Research Council Cancer Unit, University of Cambridge, Cambridge CB2 0XZ, UK; (M.S.); (L.T.); (E.N.); (C.F.)
| | - Claude Lalou
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U1211, Bordeaux University, 33076 Bordeaux, France; (C.L.); (S.S.); (R.R.)
| | - Saharnaz Sarlak
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U1211, Bordeaux University, 33076 Bordeaux, France; (C.L.); (S.S.); (R.R.)
| | - Laura Tronci
- Medical Research Council Cancer Unit, University of Cambridge, Cambridge CB2 0XZ, UK; (M.S.); (L.T.); (E.N.); (C.F.)
| | - Efterpi Nikitopoulou
- Medical Research Council Cancer Unit, University of Cambridge, Cambridge CB2 0XZ, UK; (M.S.); (L.T.); (E.N.); (C.F.)
| | - Andras T. Meszaros
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Medical University Innsbruck, 6020 Innsbruck, Austria; (A.T.M.); (E.G.)
| | - Christian Frezza
- Medical Research Council Cancer Unit, University of Cambridge, Cambridge CB2 0XZ, UK; (M.S.); (L.T.); (E.N.); (C.F.)
| | - Rodrigue Rossignol
- Institut National de la Santé Et de la Recherche Médicale (INSERM) U1211, Bordeaux University, 33076 Bordeaux, France; (C.L.); (S.S.); (R.R.)
| | - Erich Gnaiger
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Medical University Innsbruck, 6020 Innsbruck, Austria; (A.T.M.); (E.G.)
- Oroboros Instruments GmbH, 6020 Innsbruck, Austria
| | - Helmut Klocker
- Department of Surgery, Division of Experimental Urology, University Hospital for Urology, Medical University Innsbruck, 6020 Innsbruck, Austria
- Correspondence: (A.C.B.S.-S.); (H.K.)
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Moyon A, Garrigue P, Balasse L, Fernandez S, Brige P, Bouhlel A, Hache G, Dignat-George F, Taïeb D, Guillet B. Succinate Injection Rescues Vasculature and Improves Functional Recovery Following Acute Peripheral Ischemia in Rodents: A Multimodal Imaging Study. Cells 2021; 10:795. [PMID: 33918298 DOI: 10.3390/cells10040795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/26/2021] [Accepted: 03/29/2021] [Indexed: 02/08/2023] Open
Abstract
Succinate influences angiogenesis and neovascularization via a hormonelike effect on G-protein-coupled receptor 91 (GPR91). This effect has been demonstrated in the pathophysiology of diabetic retinopathy and rheumatoid arthritis. To evaluate whether succinate can play a role in acute peripheral ischemia, a preclinical study was conducted with ischemic mice treated with succinate or PBS and evaluated by imaging. Acute ischemia was followed by an increased in GPR91 expression in the ischemic muscle. As assessed with LASER-Doppler, succinate treatment resulted in an earlier and more intense reperfusion of the ischemic hindlimb compared to the control group (* p = 0.0189). A microPET study using a radiolabeled integrin ligand ([68Ga]Ga-RGD2) showed an earlier angiogenic activation in the succinate arm compared to control mice (* p = 0.020) with a prolonged effect. Additionally, clinical recovery following ischemia was better in the succinate group. In conclusion, succinate injection promotes earlier angiogenesis after ischemia, resulting in a more effective revascularization and subsequently a better functional recovery.
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Vohwinkel CU, Coit EJ, Burns N, Elajaili H, Hernandez‐Saavedra D, Yuan X, Eckle T, Nozik E, Tuder RM, Eltzschig HK. Targeting alveolar-specific succinate dehydrogenase A attenuates pulmonary inflammation during acute lung injury. FASEB J 2021; 35:e21468. [PMID: 33687752 PMCID: PMC8250206 DOI: 10.1096/fj.202002778r] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 01/22/2023]
Abstract
Acute lung injury (ALI) is an inflammatory lung disease, which manifests itself in patients as acute respiratory distress syndrome (ARDS). Previous studies have implicated alveolar-epithelial succinate in ALI protection. Therefore, we hypothesized that targeting alveolar succinate dehydrogenase SDH A would result in elevated succinate levels and concomitant lung protection. Wild-type (WT) mice or transgenic mice with targeted alveolar-epithelial Sdha or hypoxia-inducible transcription factor Hif1a deletion were exposed to ALI induced by mechanical ventilation. Succinate metabolism was assessed in alveolar-epithelial via mass spectrometry as well as redox measurements and evaluation of lung injury. In WT mice, ALI induced by mechanical ventilation decreased SDHA activity and increased succinate in alveolar-epithelial. In vitro, cell-permeable succinate decreased epithelial inflammation during stretch injury. Mice with inducible alveolar-epithelial Sdha deletion (Sdhaloxp/loxp SPC-CreER mice) revealed reduced lung inflammation, improved alveolar barrier function, and attenuated histologic injury. Consistent with a functional role of succinate to stabilize HIF, Sdhaloxp/loxp SPC-CreER experienced enhanced Hif1a levels during hypoxia or ALI. Conversely, Hif1aloxp/loxp SPC-CreER showed increased inflammation with ALI induced by mechanical ventilation. Finally, wild-type mice treated with intra-tracheal dimethlysuccinate were protected during ALI. These data suggest that targeting alveolar-epithelial SDHA dampens ALI via succinate-mediated stabilization of HIF1A. Translational extensions of our studies implicate succinate treatment in attenuating alveolar inflammation in patients suffering from ARDS.
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Affiliation(s)
- Christine U. Vohwinkel
- Developmental Lung BiologyCardiovascular Pulmonary Research LaboratoriesDivision of Pulmonary Sciences and Critical Care MedicineDivision of Pediatric Critical CareDepartments of Medicine and PediatricsUniversity of ColoradoAuroraCOUSA
| | - Ethan J. Coit
- Developmental Lung BiologyCardiovascular Pulmonary Research LaboratoriesDivision of Pulmonary Sciences and Critical Care MedicineDivision of Pediatric Critical CareDepartments of Medicine and PediatricsUniversity of ColoradoAuroraCOUSA
| | - Nana Burns
- Developmental Lung BiologyCardiovascular Pulmonary Research LaboratoriesDivision of Pulmonary Sciences and Critical Care MedicineDivision of Pediatric Critical CareDepartments of Medicine and PediatricsUniversity of ColoradoAuroraCOUSA
| | - Hanan Elajaili
- Developmental Lung BiologyCardiovascular Pulmonary Research LaboratoriesDivision of Pulmonary Sciences and Critical Care MedicineDivision of Pediatric Critical CareDepartments of Medicine and PediatricsUniversity of ColoradoAuroraCOUSA
| | | | - Xiaoyi Yuan
- Department of AnesthesiologyMcGovern Medical SchoolThe University of Texas Health Science Center at HoustonHoustonTXUSA
| | - Tobias Eckle
- Department of AnesthesiologyUniversity of Colorado ‐ Anschutz Medical CampusAuroraCOUSA
| | - Eva Nozik
- Developmental Lung BiologyCardiovascular Pulmonary Research LaboratoriesDivision of Pulmonary Sciences and Critical Care MedicineDivision of Pediatric Critical CareDepartments of Medicine and PediatricsUniversity of ColoradoAuroraCOUSA
| | - Rubin M. Tuder
- Division of Pulmonary Sciences and Critical Care MedicineUniversity of ColoradoAuroraCOUSA
| | - Holger K. Eltzschig
- Department of AnesthesiologyMcGovern Medical SchoolThe University of Texas Health Science Center at HoustonHoustonTXUSA
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Terra X, Ceperuelo-Mallafré V, Merma C, Benaiges E, Bosch R, Castillo P, Flores JC, León X, Valduvieco I, Basté N, Cámara M, Lejeune M, Gumà J, Vendrell J, Vilaseca I, Fernández-Veledo S, Avilés-Jurado FX. Succinate Pathway in Head and Neck Squamous Cell Carcinoma: Potential as a Diagnostic and Prognostic Marker. Cancers (Basel) 2021; 13:cancers13071653. [PMID: 33916314 PMCID: PMC8037494 DOI: 10.3390/cancers13071653] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 12/14/2022] Open
Abstract
Simple Summary Emerging evidence points to succinate as an important oncometabolite in cancer development; however, the contribution of the succinate-SUCNR1 axis to cancer progression remains unclear. Head and neck squamous cell carcinoma (HNSCC) is associated with disease and treatment-related morbidity so there is an urgent need for innovation in treatment and diagnosis practices. Our aim was to evaluate the potential of the succinate-related pathway as a diagnostic and prognostic biomarker in HNSCC. The circulating succinate levels are increased in HNSCC, being a potential noninvasive biomarker for HNSCC diagnosis. Moreover, the succinate receptor (SUCNR1) and genes related to succinate metabolism, which are predominantly expressed in the tumoral mucosa as compared with healthy tissue, are positively associated with plasma succinate. Remarkably, we found that SUCNR1 and SDHA expression levels predict prognosis. Abstract Head and neck squamous cell carcinoma (HNSCC) is characterized by high rates of mortality and treatment-related morbidity, underscoring the urgent need for innovative and safe treatment strategies and diagnosis practices. Mitochondrial dysfunction is a hallmark of cancer and can lead to the accumulation of tricarboxylic acid cycle intermediates, such as succinate, which function as oncometabolites. In addition to its role in cancer development through epigenetic events, succinate is an extracellular signal transducer that modulates immune response, angiogenesis and cell invasion by activating its cognate receptor SUCNR1. Here, we explored the potential value of the circulating succinate and related genes in HNSCC diagnosis and prognosis. We determined the succinate levels in the serum of 66 pathologically confirmed, untreated patients with HNSCC and 20 healthy controls. We also surveyed the expression of the genes related to succinate metabolism and signaling in tumoral and nontumoral adjacent tissue and in normal mucosa from 50 patients. Finally, we performed immunohistochemical analysis of SUCNR1 in mucosal samples. The results showed that the circulating levels of succinate were higher in patients with HNSCC than in the healthy controls. Additionally, the expression of SUCNR1, HIF-1α, succinate dehydrogenase (SDH) A, and SDHB was higher in the tumor tissue than in the matched normal mucosa. Consistent with this, immunohistochemical analysis revealed an increase in SUCNR1 protein expression in tumoral and nontumoral adjacent tissue. High SUCNR1 and SDHA expression levels were associated with poor locoregional control, and the locoregional recurrence-free survival rate was significantly lower in patients with high SUCNR1 and SDHA expression than in their peers with lower levels (77.1% [95% CI: 48.9–100.0] vs. 16.7% [95% CI: 0.0–44.4], p = 0.018). Thus, the circulating succinate levels are elevated in HNSCC and high SUCNR1/SDHA expression predicts poor locoregional disease-free survival, identifying this oncometabolite as a potentially valuable noninvasive biomarker for HNSCC diagnosis and prognosis.
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Affiliation(s)
- Ximena Terra
- MoBioFood Research Group, Biochemistry and Biotechnology Department, Universitat Rovira i Virgili, Campus Sescel·lades, 43007 Tarragona, Spain;
| | - Victoria Ceperuelo-Mallafré
- Department of Endocrinology and Nutrition, Institut d’Investigació Sanitària Pere Virgili (IISPV), Hospital Universitari de Tarragona Joan XXIII, 43005 Tarragona, Spain; (V.C.-M.); (E.B.); (J.V.)
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas (CIBERDEM), 28029 Madrid, Spain
| | - Carla Merma
- Otorhinolaryngology Head-Neck Surgery Department, Hospital Universitari de Tarragona Joan XXIII, Insitut d’Investigació Sanitària Pere Virgili, Universitat Rovira i Virgili, 43005 Tarragona, Spain; (C.M.); (J.C.F.)
| | - Ester Benaiges
- Department of Endocrinology and Nutrition, Institut d’Investigació Sanitària Pere Virgili (IISPV), Hospital Universitari de Tarragona Joan XXIII, 43005 Tarragona, Spain; (V.C.-M.); (E.B.); (J.V.)
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas (CIBERDEM), 28029 Madrid, Spain
- School of Medicine, Universitat Rovira i Virgili, 43201 Reus, Spain
| | - Ramon Bosch
- Pathology Department, Plataforma de Estudios Histológicos, Citológicos y de Digitalización, Hospital de Tortosa Verge de la Cinta, Institut d’Investigació Sanitària Pere Virgili (IISPV), URV, 43500 Tortosa, Spain; (R.B.); (M.L.)
| | - Paola Castillo
- Pathology Department, Hospital Clínic de Barcelona, IDIBAPS, 08036 Barcelona, Spain;
| | - Joan Carles Flores
- Otorhinolaryngology Head-Neck Surgery Department, Hospital Universitari de Tarragona Joan XXIII, Insitut d’Investigació Sanitària Pere Virgili, Universitat Rovira i Virgili, 43005 Tarragona, Spain; (C.M.); (J.C.F.)
| | - Xavier León
- Otorhinolaryngology Head-Neck Surgery Department, Hospital de la Santa Creu i Sant Pau and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN, MICINN, ISCIII), Universitat Autònoma de Barcelona, 08041 Barcelona, Spain;
| | - Izaskun Valduvieco
- Radiation Oncology Department, Hospital Clínic de Barcelona, 08036 Barcelona, Spain;
| | - Neus Basté
- Oncology Department, IDIBAPS, Hospital Clínic de Barcelona, 08036 Barcelona, Spain;
| | - Marina Cámara
- Maxillofacial Department, Hospital Clínic de Barcelona, 08036 Barcelona, Spain;
| | - Marylène Lejeune
- Pathology Department, Plataforma de Estudios Histológicos, Citológicos y de Digitalización, Hospital de Tortosa Verge de la Cinta, Institut d’Investigació Sanitària Pere Virgili (IISPV), URV, 43500 Tortosa, Spain; (R.B.); (M.L.)
| | - Josep Gumà
- Oncology Department, Institut d’Investigació Sanitària Pere Virgili (IISPV), Hospital Sant Joan de Reus, 43204 Reus, Spain;
| | - Joan Vendrell
- Department of Endocrinology and Nutrition, Institut d’Investigació Sanitària Pere Virgili (IISPV), Hospital Universitari de Tarragona Joan XXIII, 43005 Tarragona, Spain; (V.C.-M.); (E.B.); (J.V.)
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas (CIBERDEM), 28029 Madrid, Spain
- School of Medicine, Universitat Rovira i Virgili, 43201 Reus, Spain
| | - Isabel Vilaseca
- Otorhinolaryngology Department, UB, IDIBAPS, Hospital Clínic de Barcelona, 08036 Barcelona, Spain;
- Head Neck Clínic, Agència de Gestió d’Ajuts Universitaris i de Recerca (AGAUR), 2017-SGR-01581 Barcelona, Spain
| | - Sonia Fernández-Veledo
- Department of Endocrinology and Nutrition, Institut d’Investigació Sanitària Pere Virgili (IISPV), Hospital Universitari de Tarragona Joan XXIII, 43005 Tarragona, Spain; (V.C.-M.); (E.B.); (J.V.)
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas (CIBERDEM), 28029 Madrid, Spain
- Correspondence: (S.F.-V.); (F.X.A.-J.)
| | - Francesc Xavier Avilés-Jurado
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas (CIBERDEM), 28029 Madrid, Spain
- Otorhinolaryngology Department, UB, IDIBAPS, Hospital Clínic de Barcelona, 08036 Barcelona, Spain;
- Head Neck Clínic, Agència de Gestió d’Ajuts Universitaris i de Recerca (AGAUR), 2017-SGR-01581 Barcelona, Spain
- Correspondence: (S.F.-V.); (F.X.A.-J.)
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Zheng T, Xu B, Ji Y, Zhang W, Xin F, Dong W, Wei P, Ma J, Jiang M. A staged representation electrochemical stimulated strategy to regulate intracellular reducing power for improving succinate production by Escherichia coli AFP111. Biotechnol J 2021; 16:e2000415. [PMID: 33580738 DOI: 10.1002/biot.202000415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 01/06/2021] [Accepted: 01/12/2021] [Indexed: 01/02/2023]
Abstract
BACKGROUND Escherichia coli AFP111 was previously engineered for succinate production by eliminating byproducts of synthesis pathways. Still, the succinate yield is limited due to the insufficient NADH supplement, when fed with glucose. Microbial electrolysis cell (MEC) allows microorganisms to perform unbalanced fermentation by establishing polarized cathode interaction. METHODS AND RESULTS In this study, a cathode electrode was used as an additional electron donor to improve succinate synthesis by E. coli AFP111. In MEC with -0.65 V (vs. Ag/AgCl) poised on cathode electrode, 95.72% electrons were transferred into cells via neutral red (NR), and the ratio of NADH/NAD+ increased by 2.5-fold. Meanwhile, compared with the control experiment, the value of oxidation-reduction potential (ORP) changed from -240 to -265 mV in MEC, which was beneficial for NADH generation. During two-stage fermentation (no potential growth stage followed by electric stimulation) in MEC, succinate yield was increased by 29.09% (the final yield was 0.71 g g-1 ), and glucose consumption rate was enhanced by 36.22%. In addition, the carbon flux was pumped to succinate and pyruvate metabolism was enhanced. CONCLUSION AND IMPLICATIONS Staged representation of electrochemical stimulated strategy is effective for succinate producing in engineered E. coli by regulating intracellular reducing power, which provides a new concept for producing reduced metabolite in unbalanced fermentation.
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Affiliation(s)
- Tianwen Zheng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China
| | - Bin Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China
| | - Yaliang Ji
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China
| | - Wenming Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China.,Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, P. R. China
| | - Fengxue Xin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China.,Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, P. R. China
| | - Weiliang Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China.,Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, P. R. China
| | - Ping Wei
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China.,Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, P. R. China
| | - Jiangfeng Ma
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China.,Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, P. R. China
| | - Min Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, P. R. China.,Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, P. R. China
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130
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Saxena N, Beraldi E, Fazli L, Somasekharan SP, Adomat H, Zhang F, Molokwu C, Gleave A, Nappi L, Nguyen K, Brar P, Nikesitch N, Wang Y, Collins C, Sorensen PH, Gleave M. Androgen receptor (AR) antagonism triggers acute succinate-mediated adaptive responses to reactivate AR signaling. EMBO Mol Med 2021; 13:e13427. [PMID: 33709547 PMCID: PMC8103094 DOI: 10.15252/emmm.202013427] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 11/09/2022] Open
Abstract
Treatment-induced adaptive pathways converge to support androgen receptor (AR) reactivation and emergence of castration-resistant prostate cancer (PCa) after AR pathway inhibition (ARPI). We set out to explore poorly defined acute adaptive responses that orchestrate shifts in energy metabolism after ARPI and identified rapid changes in succinate dehydrogenase (SDH), a TCA cycle enzyme with well-known tumor suppressor activity. We show that AR directly regulates transcription of its catalytic subunits (SDHA, SDHB) via androgen response elements (AREs). ARPI acutely suppresses SDH activity, leading to accumulation of the oncometabolite, succinate. Succinate triggers calcium ions release from intracellular stores, which in turn phospho-activates the AR-cochaperone, Hsp27 via p-CaMKK2/p-AMPK/p-p38 axis to enhance AR protein stabilization and activity. Activation of this pathway was seen in tissue microarray analysis on prostatectomy tissues and patient-derived xenografts. This adaptive response is blocked by co-targeting AR with Hsp27 under both in vitro and in vivo studies, sensitizing PCa cells to ARPI treatments.
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Affiliation(s)
- Neetu Saxena
- Vancouver Prostate Centre, Vancouver, BC, Canada
| | | | - Ladan Fazli
- Vancouver Prostate Centre, Vancouver, BC, Canada
| | | | - Hans Adomat
- Vancouver Prostate Centre, Vancouver, BC, Canada
| | - Fan Zhang
- Vancouver Prostate Centre, Vancouver, BC, Canada
| | | | - Anna Gleave
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Lucia Nappi
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | | | - Pavn Brar
- Vancouver Prostate Centre, Vancouver, BC, Canada
| | | | - Yuzhuo Wang
- Vancouver Prostate Centre, Vancouver, BC, Canada.,Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Colin Collins
- Vancouver Prostate Centre, Vancouver, BC, Canada.,Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Poul H Sorensen
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Martin Gleave
- Vancouver Prostate Centre, Vancouver, BC, Canada.,Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
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131
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Desai P, Janova H, White JP, Reynoso GV, Hickman HD, Baldridge MT, Urban JF, Stappenbeck TS, Thackray LB, Diamond MS. Enteric helminth coinfection enhances host susceptibility to neurotropic flaviviruses via a tuft cell-IL-4 receptor signaling axis. Cell 2021; 184:1214-1231.e16. [PMID: 33636133 PMCID: PMC7962748 DOI: 10.1016/j.cell.2021.01.051] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 12/15/2020] [Accepted: 01/26/2021] [Indexed: 12/17/2022]
Abstract
Although enteric helminth infections modulate immunity to mucosal pathogens, their effects on systemic microbes remain less established. Here, we observe increased mortality in mice coinfected with the enteric helminth Heligmosomoides polygyrus bakeri (Hpb) and West Nile virus (WNV). This enhanced susceptibility is associated with altered gut morphology and transit, translocation of commensal bacteria, impaired WNV-specific T cell responses, and increased virus infection in the gastrointestinal tract and central nervous system. These outcomes were due to type 2 immune skewing, because coinfection in Stat6-/- mice rescues mortality, treatment of helminth-free WNV-infected mice with interleukin (IL)-4 mirrors coinfection, and IL-4 receptor signaling in intestinal epithelial cells mediates the susceptibility phenotypes. Moreover, tuft cell-deficient mice show improved outcomes with coinfection, whereas treatment of helminth-free mice with tuft cell-derived cytokine IL-25 or ligand succinate worsens WNV disease. Thus, helminth activation of tuft cell-IL-4-receptor circuits in the gut exacerbates infection and disease of a neurotropic flavivirus.
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Affiliation(s)
- Pritesh Desai
- Department of Medicine, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA
| | - Hana Janova
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA
| | - James P White
- Department of Medicine, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA
| | - Glennys V Reynoso
- Viral Immunity and Pathogenesis Unit, Laboratory of Clinical Microbiology and Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA
| | - Heather D Hickman
- Viral Immunity and Pathogenesis Unit, Laboratory of Clinical Microbiology and Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA
| | - Megan T Baldridge
- Department of Medicine, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA; Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA
| | - Joseph F Urban
- US Department of Agriculture, Agricultural Research Services, Beltsville Human Nutrition Research Center, Diet, Genomics, and Immunology Laboratory, and Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD 20705-2350, USA
| | | | - Larissa B Thackray
- Department of Medicine, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA
| | - Michael S Diamond
- Department of Medicine, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA; Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA; Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA; The Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, St. Louis, MO 63110, USA.
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132
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Huang J, Fraser ME. Second distinct conformation of the phosphohistidine loop in succinyl-CoA synthetase. Acta Crystallogr D Struct Biol 2021; 77:357-368. [PMID: 33645539 PMCID: PMC7919408 DOI: 10.1107/s2059798321000334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 01/11/2021] [Indexed: 11/10/2022] Open
Abstract
Succinyl-CoA synthetase (SCS) catalyzes a reversible reaction that is the only substrate-level phosphorylation in the citric acid cycle. One of the essential steps for the transfer of the phosphoryl group involves the movement of the phosphohistidine loop between active site I, where CoA, succinate and phosphate bind, and active site II, where the nucleotide binds. Here, the first crystal structure of SCS revealing the conformation of the phosphohistidine loop in site II of the porcine GTP-specific enzyme is presented. The phosphoryl transfer bridges a distance of 29 Å between the binding sites for phosphohistidine in site I and site II, so these crystal structures support the proposed mechanism of catalysis by SCS. In addition, a second succinate-binding site was discovered at the interface between the α- and β-subunits of SCS, and another magnesium ion was found that interacts with the side chains of Glu141β and Glu204β via water-mediated interactions. These glutamate residues interact with the active-site histidine residue when it is bound in site II.
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Affiliation(s)
- Ji Huang
- Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Marie E. Fraser
- Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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133
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Kamp H, Wahrheit J, Stinchcombe S, Walk T, Stauber F, Ravenzwaay BV. Succinate dehydrogenase inhibitors: in silico flux analysis and in vivo metabolomics investigations show no severe metabolic consequences for rats and humans. Food Chem Toxicol 2021; 150:112085. [PMID: 33636213 DOI: 10.1016/j.fct.2021.112085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/05/2021] [Accepted: 02/16/2021] [Indexed: 12/26/2022]
Abstract
Succinate dehydrogenase complex II inhibitors (SDHIs) are widely used fungicides since the 1960s. Recently, based on published in vitro cell viability data, potential health effects via disruption of the mitochondrial respiratory chain and tricarboxylic acid cycle have been postulated in mammalian species. As primary metabolic impact of SDH inhibition, an increase in succinate, and compensatory ATP production via glycolysis resulting in excess lactate levels was hypothesized. To investigate these hypotheses, genome-scale metabolic models of Rattus norvegicus and Homo sapiens were used for an in silico analysis of mammalian metabolism. Moreover, plasma samples from 28-day studies with the SDHIs boscalid and fluxapyroxad were subjected to metabolome analyses, to assess in vivo metabolite changes induced by SDHIs. The outcome of in silico analyses indicated that mammalian metabolic networks are robust and able to compensate different types of metabolic perturbation, e.g., partial or complete SDH inhibition. Additionally, the in silico comparison of rat and human responses suggested no noticeable differences between both species, evidencing that the rat is an appropriate testing organism for toxicity of SDHIs. Since no succinate or lactate accumulation were found in rats, such an accumulation is also not expected in humans as a result of SDHI exposure.
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Affiliation(s)
- H Kamp
- BASF SE, Ludwigshafen, Germany
| | | | | | - T Walk
- BASF Metabolome Solutions GmbH, Berlin, Germany
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134
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Soto-Varela ZE, Cabrera G, Romero A, Cantero D, Valle A, Bolivar J. Identification of Enzymatic Bottlenecks for the Aerobic Production of Malate from Glycerol by the Systematic Gene Overexpression of Anaplerotic Enzymes in Escherichia coli. Int J Mol Sci 2021; 22:ijms22052266. [PMID: 33668723 PMCID: PMC7956688 DOI: 10.3390/ijms22052266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/19/2021] [Accepted: 02/21/2021] [Indexed: 11/16/2022] Open
Abstract
The biotechnological production of dicarboxylic acids (C4) from renewable carbon sources represents an attractive approach for the provision of these valuable compounds by green chemistry means. Glycerol has become a waste product of the biodiesel industry that serves as a highly reduced carbon source for some microorganisms. Escherichia coli is capable of consuming glycerol to produce succinate under anaerobic fermentation, but with the deletion of some tricarboxylic acid (TCA) cycle genes, it is also able to produce succinate and malate in aerobiosis. In this study, we investigate possible rate-limiting enzymes by overexpressing the C-feeding anaplerotic enzymes Ppc, MaeA, MaeB, and Pck in a mutant that lacks the succinate dehydrogenase (Sdh) enzyme. The overexpression of the TCA enzyme Mdh and the activation of the glyoxylate shunt was also examined. Using this unbiased approach, we found that phosphoenol pyruvate carboxylase (Ppc) overexpression enhances an oxidative pathway that leads to increasing succinate, while phosphoenol pyruvate carboxykinase (Pck) favors a more efficient reductive branch that produces mainly malate, at 57.5% of the theoretical maximum molar yield. The optimization of the culture medium revealed the importance of bicarbonate and pH in the production of malate. An additional mutation of the ppc gene highlights its central role in growth and C4 production.
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Affiliation(s)
- Zamira E. Soto-Varela
- Department of Biomedicine, Biotechnology and Public Health-Biochemistry and Molecular Biology, Campus Universitario de Puerto Real, University of Cadiz, 11510 Puerto Real, Spain; (Z.E.S.-V.); (A.R.)
- Department of Chemical Engineering and Food Technology, Campus Universitario de Puerto Real, University of Cadiz, 11510 Puerto Real, Spain; (G.C.); (D.C.)
- Faculty of Basic and Biomedical Sciences, Universidad Simón Bolívar, 080020 Barranquilla, Colombia
| | - Gema Cabrera
- Department of Chemical Engineering and Food Technology, Campus Universitario de Puerto Real, University of Cadiz, 11510 Puerto Real, Spain; (G.C.); (D.C.)
- Institute of Viticulture and Agri-Food Research (IVAGRO)—International Campus of Excellence (ceiA3), University of Cadiz, 11510 Puerto Real, Spain
| | - Agustin Romero
- Department of Biomedicine, Biotechnology and Public Health-Biochemistry and Molecular Biology, Campus Universitario de Puerto Real, University of Cadiz, 11510 Puerto Real, Spain; (Z.E.S.-V.); (A.R.)
- Department of Chemical Engineering and Food Technology, Campus Universitario de Puerto Real, University of Cadiz, 11510 Puerto Real, Spain; (G.C.); (D.C.)
| | - Domingo Cantero
- Department of Chemical Engineering and Food Technology, Campus Universitario de Puerto Real, University of Cadiz, 11510 Puerto Real, Spain; (G.C.); (D.C.)
- Institute of Viticulture and Agri-Food Research (IVAGRO)—International Campus of Excellence (ceiA3), University of Cadiz, 11510 Puerto Real, Spain
| | - Antonio Valle
- Department of Biomedicine, Biotechnology and Public Health-Biochemistry and Molecular Biology, Campus Universitario de Puerto Real, University of Cadiz, 11510 Puerto Real, Spain; (Z.E.S.-V.); (A.R.)
- Institute of Viticulture and Agri-Food Research (IVAGRO)—International Campus of Excellence (ceiA3), University of Cadiz, 11510 Puerto Real, Spain
- Correspondence: (A.V.); (J.B.); Tel.: +34-956-012820 (A.V.); +34-956-012791 (J.B.)
| | - Jorge Bolivar
- Department of Biomedicine, Biotechnology and Public Health-Biochemistry and Molecular Biology, Campus Universitario de Puerto Real, University of Cadiz, 11510 Puerto Real, Spain; (Z.E.S.-V.); (A.R.)
- Institute of Biomolecules (INBIO), University of Cadiz, 11510 Puerto Real, Spain
- Correspondence: (A.V.); (J.B.); Tel.: +34-956-012820 (A.V.); +34-956-012791 (J.B.)
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135
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Abstract
Detection of pathogen-derived DNA or RNA species by cellular nucleic acid sensors prompts release of anti-microbial interferons and cytokines. In contrast to their protective anti-microbial functions, inappropriate or excessive activation of nucleic acid sensors can cause inflammatory diseases. Nucleic acid sensing is therefore tightly controlled by regulatory factors acting through both transcriptional and post-transcriptional mechanisms. Recently, it has become clearer that metabolic pathways-previously thought to be unconnected with immune responses-can influence nucleic acid sensing. This regulation can be observed when immune system cells undergo metabolic reprogramming in response to stimulation with pathogen-associated molecular patterns such as lipopolysaccharide from gram negative bacteria. Metabolic reprogramming leads to accumulation and secretion of metabolites, which have been mostly viewed as end-products of processes providing cellular energy and building blocks. However, metabolites have now been identified as important regulators of nucleic acid sensing. This mini-review aims to outline current knowledge on regulation of central nucleic acid sensing pathways by metabolites during metabolic reprogramming.
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Affiliation(s)
| | - Alice Pedersen
- Department of Biomedicin, Aarhus University, Aarhus, Denmark
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136
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Cordes T, Metallo CM. Itaconate Alters Succinate and Coenzyme A Metabolism via Inhibition of Mitochondrial Complex II and Methylmalonyl-CoA Mutase. Metabolites 2021; 11:117. [PMID: 33670656 DOI: 10.3390/metabo11020117] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/13/2021] [Accepted: 02/14/2021] [Indexed: 12/29/2022] Open
Abstract
Itaconate is a small molecule metabolite that is endogenously produced by cis-aconitate decarboxylase-1 (ACOD1) in mammalian cells and influences numerous cellular processes. The metabolic consequences of itaconate in cells are diverse and contribute to its regulatory function. Here, we have applied isotope tracing and mass spectrometry approaches to explore how itaconate impacts various metabolic pathways in cultured cells. Itaconate is a competitive and reversible inhibitor of Complex II/succinate dehydrogenase (SDH) that alters tricarboxylic acid (TCA) cycle metabolism leading to succinate accumulation. Upon activation with coenzyme A (CoA), itaconyl-CoA inhibits adenosylcobalamin-mediated methylmalonyl-CoA (MUT) activity and, thus, indirectly impacts branched-chain amino acid (BCAA) metabolism and fatty acid diversity. Itaconate, therefore, alters the balance of CoA species in mitochondria through its impacts on TCA, amino acid, vitamin B12, and CoA metabolism. Our results highlight the diverse metabolic pathways regulated by itaconate and provide a roadmap to link these metabolites to potential downstream biological functions.
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137
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Rasmussen TS, Streidl T, Hitch TCA, Wortmann E, Deptula P, Kofoed MVW, Riedel T, Neumann-Schaal M, Hansen M, Nielsen DS, Clavel T, Vogensen FK. Sporofaciens musculi gen. nov., sp. nov., a novel bacterium isolated from the caecum of an obese mouse. Int J Syst Evol Microbiol 2021; 71. [PMID: 33512312 DOI: 10.1099/ijsem.0.004673] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
A bacterial strain, designated WCA-9-b2T, was isolated from the caecal content of an 18-week-old obese C57BL/6NTac male mouse. According to phenotypic analyses, the isolate was rod-shaped, strictly anaerobic, spore-forming, non-motile and Gram-stain-positive, under the conditions tested. Colonies were irregular and non-pigmented. Analysis of the 16S rRNA gene sequence indicated that the isolate belonged to the order Clostridiales with Dorea longicatena ATCC 27755T (94.9 % sequence identity), Ruminococcus gnavus ATCC 29149T (94.8%) and Clostridium scindens ATCC 35704T (94.3%) being the closest relatives. Whole genome sequencing showed an average nucleotide identity <74.23 %, average amino acid identity <64.52-74.67 % and percentage of conserved proteins values <50 % against the nine closest relatives (D. longicatena, Ruminococcus gnavus, C. scindens, Dorea formicigenerans, Ruminococcus lactaris, Clostridium hylemonae, Merdimonas faecis, Faecalicatena contorta and Faecalicatena fissicatena). The genome-based G+C content of genomic DNA was 44.4 mol%. The major cellular fatty acids were C16 : 0 (24.5%), C18 : 1 cis9 (19.8 %), C16 : 0 DMA (11.7%), C18 : 0 (8.4%) and C14 : 0 (6.6%). Respiratory quinones were not detected. The predominant metabolic end products of glucose fermentation were acetate and succinate. Production of CO2 and H2 were detected. Based on these data, we propose that strain WCA-9-b2T represents a novel species within a novel genus, for which the name Sporofaciens musculi gen. nov., sp. nov. is proposed. The type strain is WCA-9-b2T (=DSM 106039T=CECT 30156T).
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Affiliation(s)
- Torben Sølbeck Rasmussen
- Section of Microbiology and Fermentation, Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Theresa Streidl
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Thomas C A Hitch
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Esther Wortmann
- Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Paulina Deptula
- Section of Microbiology and Fermentation, Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Michael V W Kofoed
- Microbial Conversion Technologies Research Group, Section for Biological and Chemical Engineering, Department of Engineering, Aarhus University, Aarhus, Denmark
| | - Thomas Riedel
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Meina Neumann-Schaal
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Michael Hansen
- Center for Advanced Bioimaging, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Dennis Sandris Nielsen
- Section of Microbiology and Fermentation, Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Thomas Clavel
- ZIEL Core Facility Microbiome, Technical University of Munich, Freising, Germany.,Functional Microbiome Research Group, Institute of Medical Microbiology, RWTH University Hospital, Aachen, Germany
| | - Finn Kvist Vogensen
- Section of Microbiology and Fermentation, Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
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138
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Matlac DM, Hadrava Vanova K, Bechmann N, Richter S, Folberth J, Ghayee HK, Ge GB, Abunimer L, Wesley R, Aherrahrou R, Dona M, Martínez-Montes ÁM, Calsina B, Merino MJ, Schwaninger M, Deen PMT, Zhuang Z, Neuzil J, Pacak K, Lehnert H, Fliedner SMJ. Succinate Mediates Tumorigenic Effects via Succinate Receptor 1: Potential for New Targeted Treatment Strategies in Succinate Dehydrogenase Deficient Paragangliomas. Front Endocrinol (Lausanne) 2021; 12:589451. [PMID: 33776908 PMCID: PMC7994772 DOI: 10.3389/fendo.2021.589451] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 01/29/2021] [Indexed: 12/12/2022] Open
Abstract
Paragangliomas and pheochromocytomas (PPGLs) are chromaffin tumors associated with severe catecholamine-induced morbidities. Surgical removal is often curative. However, complete resection may not be an option for patients with succinate dehydrogenase subunit A-D (SDHx) mutations. SDHx mutations are associated with a high risk for multiple recurrent, and metastatic PPGLs. Treatment options in these cases are limited and prognosis is dismal once metastases are present. Identification of new therapeutic targets and candidate drugs is thus urgently needed. Previously, we showed elevated expression of succinate receptor 1 (SUCNR1) in SDHB PPGLs and SDHD head and neck paragangliomas. Its ligand succinate has been reported to accumulate due to SDHx mutations. We thus hypothesize that autocrine stimulation of SUCNR1 plays a role in the pathogenesis of SDHx mutation-derived PPGLs. We confirmed elevated SUCNR1 expression in SDHx PPGLs and after SDHB knockout in progenitor cells derived from a human pheochromocytoma (hPheo1). Succinate significantly increased viability of SUCNR1-transfected PC12 and ERK pathway signaling compared to control cells. Candidate SUCNR1 inhibitors successfully reversed proliferative effects of succinate. Our data reveal an unrecognized oncometabolic function of succinate in SDHx PPGLs, providing a growth advantage via SUCNR1.
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Affiliation(s)
- Dieter M. Matlac
- Neuroendocrine Oncology and Metabolism, Medical Department I, Center of Brain, Behavior, and Metabolism, University Medical Center Schleswig-Holstein Lübeck, Lübeck, Germany
| | - Katerina Hadrava Vanova
- Institute of Biotechnology, Czech Academy of Sciences, Prague-West, Czechia
- Section on Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States
| | - Nicole Bechmann
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Susan Richter
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Julica Folberth
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Hans K. Ghayee
- Department of Medicine, Division of Endocrinology, University of Florida and Malcom Randall VA Medical Center, Gainesville, FL, United States
| | - Guang-Bo Ge
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Luma Abunimer
- Section on Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States
| | | | - Redouane Aherrahrou
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany
- Department of Biomedical Engineering, Centre for Public Health Genomics, University of Virginia, Charlottesville, VA, United States
| | - Margo Dona
- Division of Endocrinology 471, Department of Internal Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - Ángel M. Martínez-Montes
- Hereditary Endocrine Cancer Group, Human Cancer Genetics Program, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Bruna Calsina
- Hereditary Endocrine Cancer Group, Human Cancer Genetics Program, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Maria J. Merino
- Laboratory of Surgical Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Markus Schwaninger
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | | | - Zhengping Zhuang
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Jiri Neuzil
- Institute of Biotechnology, Czech Academy of Sciences, Prague-West, Czechia
- School of Medical Science, Griffith University, Southport, QLD, Australia
| | - Karel Pacak
- Section on Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States
| | - Hendrik Lehnert
- Neuroendocrine Oncology and Metabolism, Medical Department I, Center of Brain, Behavior, and Metabolism, University Medical Center Schleswig-Holstein Lübeck, Lübeck, Germany
| | - Stephanie M. J. Fliedner
- Neuroendocrine Oncology and Metabolism, Medical Department I, Center of Brain, Behavior, and Metabolism, University Medical Center Schleswig-Holstein Lübeck, Lübeck, Germany
- *Correspondence: Stephanie M. J. Fliedner,
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139
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Blechar JA, Al-Gousous J, Wilhelmy C, Postina AM, Getto M, Langguth P. Toward Mechanistic Design of Surrogate Buffers for Dissolution Testing of pH-Dependent Drug Delivery Systems. Pharmaceutics 2020; 12:E1197. [PMID: 33321933 DOI: 10.3390/pharmaceutics12121197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/03/2020] [Accepted: 12/07/2020] [Indexed: 01/11/2023] Open
Abstract
The in vivo dissolution of enteric-coated (EC) products is often overestimated by compendial in vitro dissolution experiments. It is of great interest to mimic the in vivo conditions as closely as possible in vitro in order to predict the in vivo behavior of EC dosage forms. The reason behind this is the overly high buffering capacity of the common compendial buffers compared to the intestinal bicarbonate buffer. However, a bicarbonate-based buffer is technically difficult to handle due to the need for continuous sparging of the media with CO2 to maintain the desired buffer pH. Therefore, bicarbonate buffers are not commonly used in routine practice and a non-volatile alternative is of interest. A mathematical mass transport modelling approach was previously found to enable accurate calculation of surrogate buffer molarities for small molecule compounds; however, the additional complexity of polymeric materials makes this difficult to achieve for an enteric coat. In this work, an approach was developed allowing relatively rapid screening of potential surrogate buffers for enteric coating. It was found that the effective buffering pKa of bicarbonate at the surface of a dissolving enteric polymer tended to be around 5.5, becoming higher when the dissolving enteric polymer formed a gel of greater firmness/viscosity and vice versa. Using succinate (pKa 5.2 under physiological ionic strength) and/or citrate (pKa 5.7 under physiological ionic strength) at conjugate base molarities corresponding to bicarbonate molarities in the intestinal segments of interest as an initial “guess” can minimize the number of experimental iterations necessary to design an appropriate surrogate.
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140
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Baksh SC, Finley LWS. Metabolic Coordination of Cell Fate by α-Ketoglutarate-Dependent Dioxygenases. Trends Cell Biol 2021; 31:24-36. [PMID: 33092942 DOI: 10.1016/j.tcb.2020.09.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/20/2020] [Accepted: 09/26/2020] [Indexed: 12/14/2022]
Abstract
Cell fate determination requires faithful execution of gene expression programs, which are increasingly recognized to respond to metabolic inputs. In particular, the family of α-ketoglutarate (αKG)-dependent dioxygenases, which include several chromatin-modifying enzymes, are emerging as key mediators of metabolic control of cell fate. αKG-dependent dioxygenases consume the metabolite αKG (also known as 2-oxoglutarate) as an obligate cosubstrate and are inhibited by succinate, fumarate, and 2-hydroxyglutarate. Here, we review the role of these metabolites in the control of dioxygenase activity and cell fate programs. We discuss the biochemical and transcriptional mechanisms enabling these metabolites to control cell fate and review evidence that nutrient availability shapes tissue-specific fate programs via αKG-dependent dioxygenases.
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141
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Dallons M, Alpan E, Schepkens C, Tagliatti V, Colet JM. GPR91 Receptor Mediates Protection against Doxorubicin-Induced Cardiotoxicity without Altering Its Anticancer Efficacy. An In Vitro Study on H9C2 Cardiomyoblasts and Breast Cancer-Derived MCF-7 Cells. Cells 2020; 9:E2177. [PMID: 32992522 PMCID: PMC7599858 DOI: 10.3390/cells9102177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/17/2020] [Accepted: 09/25/2020] [Indexed: 11/16/2022] Open
Abstract
Doxorubicin (DOX) is an anticancer drug widely used in oncology, especially for breast cancer. The main limitation of DOX treatment is its cardiotoxicity due to the cumulative dose. Clinically, DOX-induced cardiomyopathy develops as a progressive heart failure caused by a progressive cardiomyocyte's death. For long, the oxidative stress induced by DOX was considered as the main toxic mechanism responsible for heart damage, but it is now controverted, and other processes are investigated to develop cardioprotective strategies. Previously, we studied DOX-induced cardiotoxicity and dexrazoxane (DEX), the only cardioprotective compound authorized by the FDA, by 1H-NMR metabonomics in H9C2 cells. We observed an increased succinate secretion in the extracellular fluid of DEX-exposed cardiomyocytes, a finding that led us to the hypothesis of a possible protective role of this agonist of the GPR91 receptor. The objective of the present work was to study the effect of succinate (SUC) and cis-epoxysuccinate (cis-ES), two agonists of the GPR91 receptor, on DOX-induced cardiotoxicity to H9C2 cells. To this purpose, several toxicity parameters, including cell viability, oxidative stress and apoptosis, as well as the GPR91 expression, were measured to assess the effects of DEX, SUC and cis-ES either alone or in combination with DOX in H9C2 cells. A 1H-NMR-based metabonomic study was carried out on cellular fluids collected after 24 h to highlight the metabolic changes induced by those protective compounds. Moreover, the effects of each agonist given either alone or in combination with DOX were evaluated on MCF-7 breast cancer cells. GPR91 expression was confirmed in H9C2 cells, while no expression was found in MCF-7 cells. Under such experimental conditions, both SUC and cis-ES decreased partially the cellular mortality, the oxidative stress and the apoptosis induced by DOX. The SUC protective effect was similar to the DEX effect, but the protective effect of cis-ES was higher on oxidative stress and apoptosis. In addition, the metabonomics findings pointed out several metabolic pathways involved in the cardioprotective effects of both GPR91 agonists: the stimulation of aerobic metabolism with glucose as the main fuel, redox balance and phospholipids synthesis. Finally, none of the GPR91 agonists jeopardized the pharmacological effects of DOX on MCF-7 breast cancer cells.
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Affiliation(s)
| | | | | | | | - Jean-Marie Colet
- Department of Human Biology & Toxicology, Faculty of Medicine and Pharmacy, University of Mons, Place du Parc 20, 7000 Mons, Belgium; (M.D.); (E.A.); (C.S.); (V.T.)
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142
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Hart PC, Kenny HA, Grassl N, Watters KM, Litchfield LM, Coscia F, Blaženović I, Ploetzky L, Fiehn O, Mann M, Lengyel E, Romero IL. Mesothelial Cell HIF1α Expression Is Metabolically Downregulated by Metformin to Prevent Oncogenic Tumor-Stromal Crosstalk. Cell Rep 2020; 29:4086-4098.e6. [PMID: 31851935 DOI: 10.1016/j.celrep.2019.11.079] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 10/04/2019] [Accepted: 11/19/2019] [Indexed: 01/04/2023] Open
Abstract
The tumor microenvironment (TME) plays a pivotal role in cancer progression, and, in ovarian cancer (OvCa), the primary TME is the omentum. Here, we show that the diabetes drug metformin alters mesothelial cells in the omental microenvironment. Metformin interrupts bidirectional signaling between tumor and mesothelial cells by blocking OvCa cell TGF-β signaling and mesothelial cell production of CCL2 and IL-8. Inhibition of tumor-stromal crosstalk by metformin is caused by the reduced expression of the tricarboxylic acid (TCA) enzyme succinyl CoA ligase (SUCLG2). Through repressing this TCA enzyme and its metabolite, succinate, metformin activated prolyl hydroxylases (PHDs), resulting in the degradation of hypoxia-inducible factor 1α (HIF1α) in mesothelial cells. Disruption of HIF1α-driven IL-8 signaling in mesothelial cells by metformin results in reduced OvCa invasion in an organotypic 3D model. These findings indicate that tumor-promoting signaling between mesothelial and OvCa cells in the TME can be targeted using metformin.
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Affiliation(s)
- Peter C Hart
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Hilary A Kenny
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Niklas Grassl
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Karen M Watters
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Lacey M Litchfield
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA
| | - Fabian Coscia
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Ivana Blaženović
- West Coast Metabolomics Center, University of California, Davis Genome Center, Davis, CA, USA
| | - Lisa Ploetzky
- West Coast Metabolomics Center, University of California, Davis Genome Center, Davis, CA, USA
| | - Oliver Fiehn
- West Coast Metabolomics Center, University of California, Davis Genome Center, Davis, CA, USA
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Ernst Lengyel
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA.
| | - Iris L Romero
- Department of Obstetrics and Gynecology/Section of Gynecologic Oncology, University of Chicago, Chicago, IL 60637, USA.
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143
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Reddy A, Bozi LHM, Yaghi OK, Mills EL, Xiao H, Nicholson HE, Paschini M, Paulo JA, Garrity R, Laznik-Bogoslavski D, Ferreira JCB, Carl CS, Sjøberg KA, Wojtaszewski JFP, Jeppesen JF, Kiens B, Gygi SP, Richter EA, Mathis D, Chouchani ET. pH-Gated Succinate Secretion Regulates Muscle Remodeling in Response to Exercise. Cell 2020; 183:62-75.e17. [PMID: 32946811 DOI: 10.1016/j.cell.2020.08.039] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 07/05/2020] [Accepted: 08/17/2020] [Indexed: 12/23/2022]
Abstract
In response to skeletal muscle contraction during exercise, paracrine factors coordinate tissue remodeling, which underlies this healthy adaptation. Here we describe a pH-sensing metabolite signal that initiates muscle remodeling upon exercise. In mice and humans, exercising skeletal muscle releases the mitochondrial metabolite succinate into the local interstitium and circulation. Selective secretion of succinate is facilitated by its transient protonation, which occurs upon muscle cell acidification. In the protonated monocarboxylic form, succinate is rendered a transport substrate for monocarboxylate transporter 1, which facilitates pH-gated release. Upon secretion, succinate signals via its cognate receptor SUCNR1 in non-myofibrillar cells in muscle tissue to control muscle-remodeling transcriptional programs. This succinate-SUCNR1 signaling is required for paracrine regulation of muscle innervation, muscle matrix remodeling, and muscle strength in response to exercise training. In sum, we define a bioenergetic sensor in muscle that utilizes intracellular pH and succinate to coordinate tissue adaptation to exercise.
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Affiliation(s)
- Anita Reddy
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Luiz H M Bozi
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Cell Biology, Harvard Medical School, Boston, MA, USA; Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Omar K Yaghi
- Department of Immunology, Harvard Medical School, Boston, MA 02115, USA
| | - Evanna L Mills
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Haopeng Xiao
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Hilary E Nicholson
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Margherita Paschini
- Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA 02115, USA
| | - Joao A Paulo
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Ryan Garrity
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | | | - Julio C B Ferreira
- Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Christian S Carl
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Kim A Sjøberg
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Jørgen F P Wojtaszewski
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | | | - Bente Kiens
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Steven P Gygi
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Erik A Richter
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Diane Mathis
- Department of Immunology, Harvard Medical School, Boston, MA 02115, USA
| | - Edward T Chouchani
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Cell Biology, Harvard Medical School, Boston, MA, USA.
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144
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Harber KJ, de Goede KE, Verberk SGS, Meinster E, de Vries HE, van Weeghel M, de Winther MPJ, Van den Bossche J. Succinate Is an Inflammation-Induced Immunoregulatory Metabolite in Macrophages. Metabolites 2020; 10:metabo10090372. [PMID: 32942769 PMCID: PMC7569821 DOI: 10.3390/metabo10090372] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/28/2020] [Accepted: 09/15/2020] [Indexed: 01/09/2023] Open
Abstract
Immunometabolism revealed the crucial role of cellular metabolism in controlling immune cell phenotype and functions. Macrophages, key immune cells that support progression of numerous inflammatory diseases, have been well described as undergoing vast metabolic rewiring upon activation. The immunometabolite succinate particularly gained a lot of attention and emerged as a crucial regulator of macrophage responses and inflammation. Succinate was originally described as a metabolite that supports inflammation via distinct routes. Recently, studies have indicated that succinate and its receptor SUCNR1 can suppress immune responses as well. These apparent contradictory effects might be due to specific experimental settings and particularly the use of distinct succinate forms. We therefore compared the phenotypic and functional effects of distinct succinate forms and receptor mouse models that were previously used for studying succinate immunomodulation. Here, we show that succinate can suppress secretion of inflammatory mediators IL-6, tumor necrosis factor (TNF) and nitric oxide (NO), as well as inhibit Il1b mRNA expression of inflammatory macrophages in a SUCNR1-independent manner. We also observed that macrophage SUCNR1 deficiency led to an enhanced inflammatory response without addition of exogenous succinate. While our study does not reveal new mechanistic insights into how succinate elicits different inflammatory responses, it does indicate that the inflammatory effects of succinate and its receptor SUCNR1 in macrophages are clearly context dependent.
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Affiliation(s)
- Karl J. Harber
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands; (K.J.H.); (K.E.d.G.); (S.G.S.V.); (E.M.); (H.E.d.V.)
- Department of Medical Biochemistry, Amsterdam UMC, University of Amsterdam, Experimental Vascular Biology, 1105 AZ Amsterdam, The Netherlands;
- Laboratory Genetic Metabolic Diseases, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Kyra E. de Goede
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands; (K.J.H.); (K.E.d.G.); (S.G.S.V.); (E.M.); (H.E.d.V.)
| | - Sanne G. S. Verberk
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands; (K.J.H.); (K.E.d.G.); (S.G.S.V.); (E.M.); (H.E.d.V.)
| | - Elisa Meinster
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands; (K.J.H.); (K.E.d.G.); (S.G.S.V.); (E.M.); (H.E.d.V.)
| | - Helga E. de Vries
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands; (K.J.H.); (K.E.d.G.); (S.G.S.V.); (E.M.); (H.E.d.V.)
| | - Michel van Weeghel
- Laboratory Genetic Metabolic Diseases, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Menno P. J. de Winther
- Department of Medical Biochemistry, Amsterdam UMC, University of Amsterdam, Experimental Vascular Biology, 1105 AZ Amsterdam, The Netherlands;
| | - Jan Van den Bossche
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands; (K.J.H.); (K.E.d.G.); (S.G.S.V.); (E.M.); (H.E.d.V.)
- Correspondence:
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145
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Mock M, Schmid A, Bühler K. Directed Reaction Engineering Boosts Succinate Formation of Synechocystis sp. PCC 6803_Δsll1625. Biotechnol J 2020; 15:e2000127. [PMID: 32845563 DOI: 10.1002/biot.202000127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/10/2020] [Indexed: 11/07/2022]
Abstract
It is known that Synechocystis sp. PCC 6803 carrying a partial deletion of the succinate dehydrogenase (Synechocystis_∆sll1625) secretes succinate during aerobic cultivation with continuous illumination and in the presence of CO2 . Maximal succinate titers of 2 mM (236 mg L-1 ) are reported. CO2 is identified as a crucial parameter for product formation, however, a detailed characterization of different cultivation conditions is still missing. Here the focus is on further reaction engineering to improve the photoautotrophic production of succinate using Synechocystis_∆sll1625. Therefore the impact of light availability, illumination regimes, nutrient availability, and external pH on product formation are investigated. Results obtained in this study reveal the importance of these parameters on the formation of succinate and cultivation with light/dark cycles increases the succinate concentration to 3 mM (354 mg L-1 ) after 28 days of cultivation. Furthermore, cultivation in unbuffered medium under ambient CO2 conditions even doubled the final succinate titer to 4 mM (472 mg L-1 ) after 28 days. Taking biomass concentrations into account, a maximal yield of succinate on biomass of 215 mgSucc gCDW -1 is achieved, which is the highest so far reported for the production of succinate utilizing Synechocystis as host organism.
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Affiliation(s)
- Magdalena Mock
- Department Solar Materials, Helmholtz Centre for Environmental Research-UFZ, Leipzig, 04318, Germany
| | - Andreas Schmid
- Department Solar Materials, Helmholtz Centre for Environmental Research-UFZ, Leipzig, 04318, Germany
| | - Katja Bühler
- Department Solar Materials, Helmholtz Centre for Environmental Research-UFZ, Leipzig, 04318, Germany
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146
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Li X, Xie L, Qu X, Zhao B, Fu W, Wu B, Wu J. GPR91, a critical signaling mechanism in modulating pathophysiologic processes in chronic illnesses. FASEB J 2020; 34:13091-13105. [PMID: 32812686 DOI: 10.1096/fj.202001037r] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/08/2020] [Accepted: 06/23/2020] [Indexed: 12/18/2022]
Abstract
Succinate receptor GPR91 is one of G protein-coupled receptors (GPCRs), and is expressed in a variety of cell types and tissues. Succinate is its natural ligand, and its activation represents that an intrinsic metabolic intermediate exerts a regulatory role on many critical life processes involving pathophysiologic mechanisms, such as innate immunity, inflammation, tissue repair, and oncogenesis. With the illustration of 3-dimensional crystal structure of the receptor and discovery of its antagonists, it is possible to dissect the succinate-GPR91-G protein signaling pathways in different cell types under pathophysiological conditions. Deep understanding of the GPR91-ligand binding mode with various agonists and antagonists would aid in elucidating the molecular basis of a spectrum of chronic illnesses, such as hypertension, diabetes, and their renal and retina complications, metabolic-associated fatty liver diseases, such as nonalcoholic steatohepatitis and its fibrotic progression, inflammatory bowel diseases (Crohn's disease and ulcerative colitis), age-related macular degeneration, rheumatoid arthritis, and progressive behaviors of malignancies. With better delineation of critical regulatory role of the succinate-GPR91 axis in these illnesses, therapeutic intervention may be developed by specifically targeting this signaling pathway with small molecular antagonists or other strategies.
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Affiliation(s)
- Xinyi Li
- Department of Medical Microbiology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Li Xie
- Department of Medical Microbiology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Xiangli Qu
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Bangyi Zhao
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, Shanghai, China
| | - Wei Fu
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, Shanghai, China
| | - Beili Wu
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Jian Wu
- Department of Medical Microbiology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University, Shanghai, China.,Department of Gastroenterology & Hepatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Liver Diseases, Fudan University Shanghai Medical College, Shanghai, China
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147
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Mendonça Machado N, Torrinhas RS, Sala P, Ishida RK, Guarda IFMS, Moura EGHD, Sakai P, Santo MA, Linetzky Waitzberg D. Type 2 Diabetes Metabolic Improvement After Roux-en-Y Gastric Bypass May Include a Compensatory Mechanism That Balances Fatty Acid β and ω Oxidation. JPEN J Parenter Enteral Nutr 2020; 44:1417-1427. [PMID: 32654184 DOI: 10.1002/jpen.1960] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 06/28/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND More than half of patients who undergo Roux-en-Y gastric bypass (RYGB) can experience type 2 diabetes (T2D) remission, but the systemic and gastrointestinal (GI) metabolic mechanisms of this improvement are still elusive. METHODS Paired samples collected before and 3 months after RYGB from 28 women with obesity and T2D were analyzed by metabolomics with gas chromatography coupled to mass spectrometry. Samples include plasma (n = 56) and biopsies of gastric pouch (n = 18), gastric remnant (n = 10), duodenum (n = 16), jejunum (n = 18), and ileum (n = 18), collected by double-balloon enteroscopy. RESULTS After RYGB, improvements in body composition and weight-related and glucose homeostasis parameters were observed. Plasma-enriched metabolic pathways included arginine and proline metabolism, urea and tricarboxylic acid (TCA) cycles, gluconeogenesis, malate-aspartate shuttle, and carnitine synthesis. In GI tissue, we observed alterations of ammonia recycling and carnitine synthesis in gastric pouch, phenylacetate metabolism and trehalose degradation in duodenum and jejunum, ketone bodies in jejunum, and lactose degradation in ileum. Intermediates molecules of the TCA cycle were enriched, particularly in plasma, jejunum, and ileum. Fluctuations of dicarboxylic acids (DCAs) were relevant in several metabolomic tests, and metabolite alterations included aminomalonate and fumaric, malic, oxalic, and succinic acids. The product/substrate relationship between these molecules and its pathways may reflect a compensatory mechanism to balance metabolism. CONCLUSIONS RYGB was associated with systemic and GI metabolic reprogramming. DCA alterations link ω and β fatty acid oxidation to homeostatic mechanisms, including TCA cycle improvement.
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Affiliation(s)
- Natasha Mendonça Machado
- Department of Gastroenterology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Raquel Susana Torrinhas
- Department of Gastroenterology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Priscila Sala
- Department of Gastroenterology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Robson Kiyoshi Ishida
- Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Ismael Francisco Mota Siqueira Guarda
- Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Eduardo Guimarães Hourneaux de Moura
- Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Paulo Sakai
- Gastrointestinal Endoscopy Unit, Department of Gastroenterology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Marco Aurélio Santo
- Bariatric and Metabolic Surgery Unit, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Dan Linetzky Waitzberg
- Department of Gastroenterology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
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148
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Arneson-Wissink PC, Hogan KA, Ducharme AM, Samani A, Jatoi A, Doles JD. The wasting-associated metabolite succinate disrupts myogenesis and impairs skeletal muscle regeneration. JCSM Rapid Commun 2020; 3:56-69. [PMID: 32905522 PMCID: PMC7470228 DOI: 10.1002/rco2.14] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
BACKGROUND Muscle wasting is a debilitating co-morbidity affecting most advanced cancer patients. Alongside enhanced muscle catabolism, defects in muscle repair/regeneration contribute to cancer-associated wasting. Among the factors implicated in suppression of muscle regeneration are cytokines that interfere with myogenic signal transduction pathways. Less understood is how other cancer/wasting-associated cues, such as metabolites, contribute to muscle dysfunction. This study investigates how the metabolite succinate affects myogenesis and muscle regeneration. METHODS We leveraged an established ectopic metabolite treatment (cell permeable dimethyl-succinate) strategy to evaluate the ability of intracellular succinate elevation to 1) affect myoblast homeostasis (proliferation, apoptosis), 2) disrupt protein dynamics and induce wasting-associated atrophy, and 3) modulate in vitro myogenesis. In vivo succinate supplementation experiments (2% succinate, 1% sucrose vehicle) were used to corroborate and extend in vitro observations. Metabolic profiling and functional metabolic studies were then performed to investigate the impact of succinate elevation on mitochondria function. RESULTS We found that in vitro succinate supplementation elevated intracellular succinate about 2-fold, and did not have an impact on proliferation or apoptosis of C2C12 myoblasts. Elevated succinate had minor effects on protein homeostasis (~25% decrease in protein synthesis assessed by OPP staining), and no significant effect on myotube atrophy. Succinate elevation interfered with in vitro myoblast differentiation, characterized by significant decreases in late markers of myogenesis and fewer nuclei per myosin heavy chain positive structure (assessed by immunofluorescence staining). While mice orally administered succinate did not exhibit changes in overall body composition or whole muscle weights, these mice displayed smaller muscle myofiber diameters (~6% decrease in the mean of non-linear regression curves fit to the histograms of minimum feret diameter distribution), which was exacerbated when muscle regeneration was induced with barium chloride injury. Significant decreases in the mean of non-linear regression curves fit to the histograms of minimum feret diameter distributions were observed 7 days and 28 days post injury. Elevated numbers of myogenin positive cells (3-fold increase) supportive of the differentiation defects observed in vitro were observed 28 days post injury. Metabolic profiling and functional metabolic assessment of myoblasts revealed that succinate elevation caused both widespread metabolic changes and significantly lowered maximal cellular respiration (~35% decrease). CONCLUSIONS This study broadens the repertoire of wasting-associated factors that can directly modulate muscle progenitor cell function and strengthens the hypothesis that metabolic derangements are significant contributors to impaired muscle regeneration, an important aspect of cancer-associated muscle wasting.
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Affiliation(s)
- Paige C Arneson-Wissink
- Department of Biochemistry and Molecular Biology, Mayo
Clinic, Rochester, Minnesota, 55905 USA
| | - Kelly A Hogan
- Department of Biochemistry and Molecular Biology, Mayo
Clinic, Rochester, Minnesota, 55905 USA
| | - Alexandra M Ducharme
- Department of Biochemistry and Molecular Biology, Mayo
Clinic, Rochester, Minnesota, 55905 USA
| | - Adrienne Samani
- Department of Biochemistry and Molecular Biology, Mayo
Clinic, Rochester, Minnesota, 55905 USA
| | - Aminah Jatoi
- Department of Oncology, Mayo Clinic, Rochester,
Minnesota
| | - Jason D Doles
- Department of Biochemistry and Molecular Biology, Mayo
Clinic, Rochester, Minnesota, 55905 USA
- Corresponding Author: Jason D Doles, Department of
Biochemistry and Molecular Biology, Mayo Clinic, 200 First St SW, Guggenheim
16-11A1, Rochester, MN 55905, Tel: (507) 284-9372, Fax: (507) 284-3383,
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149
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Sengupta A, Pritam P, Jaiswal D, Bandyopadhyay A, Pakrasi HB, Wangikar PP. Photosynthetic Co-Production of Succinate and Ethylene in A Fast-Growing Cyanobacterium, Synechococcus elongatus PCC 11801. Metabolites 2020; 10:E250. [PMID: 32560048 DOI: 10.3390/metabo10060250] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/21/2020] [Accepted: 06/12/2020] [Indexed: 12/13/2022] Open
Abstract
Cyanobacteria are emerging as hosts for photoautotrophic production of chemicals. Recent studies have attempted to stretch the limits of photosynthetic production, typically focusing on one product at a time, possibly to minimise the additional burden of product separation. Here, we explore the simultaneous production of two products that can be easily separated: ethylene, a gaseous product, and succinate, an organic acid that accumulates in the culture medium. This was achieved by expressing a single copy of the ethylene forming enzyme (efe) under the control of PcpcB, the inducer-free super-strong promoter of phycocyanin β subunit. We chose the recently reported, fast-growing and robust cyanobacterium, Synechococcus elongatus PCC 11801, as the host strain. A stable recombinant strain was constructed using CRISPR-Cpf1 in a first report of markerless genome editing of this cyanobacterium. Under photoautotrophic conditions, the recombinant strain shows specific productivities of 338.26 and 1044.18 μmole/g dry cell weight/h for ethylene and succinate, respectively. These results compare favourably with the reported productivities for individual products in cyanobacteria that are highly engineered. Metabolome profiling and 13C labelling studies indicate carbon flux redistribution and suggest avenues for further improvement. Our results show that S. elongatus PCC 11801 is a promising candidate for metabolic engineering.
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Flores AD, Choi HG, Martinez R, Onyeabor M, Ayla EZ, Godar A, Machas M, Nielsen DR, Wang X. Catabolic Division of Labor Enhances Production of D-Lactate and Succinate From Glucose-Xylose Mixtures in Engineered Escherichia coli Co-culture Systems. Front Bioeng Biotechnol 2020; 8:329. [PMID: 32432089 PMCID: PMC7214542 DOI: 10.3389/fbioe.2020.00329] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/25/2020] [Indexed: 01/01/2023] Open
Abstract
Although biological upgrading of lignocellulosic sugars represents a promising and sustainable route to bioplastics, diverse and variable feedstock compositions (e.g., glucose from the cellulose fraction and xylose from the hemicellulose fraction) present several complex challenges. Specifically, sugar mixtures are often incompletely metabolized due to carbon catabolite repression while composition variability further complicates the optimization of co-utilization rates. Benefiting from several unique features including division of labor, increased metabolic diversity, and modularity, synthetic microbial communities represent a promising platform with the potential to address persistent bioconversion challenges. In this work, two unique and catabolically orthogonal Escherichia coli co-cultures systems were developed and used to enhance the production of D-lactate and succinate (two bioplastic monomers) from glucose-xylose mixtures (100 g L-1 total sugars, 2:1 by mass). In both cases, glucose specialist strains were engineered by deleting xylR (encoding the xylose-specific transcriptional activator, XylR) to disable xylose catabolism, whereas xylose specialist strains were engineered by deleting several key components involved with glucose transport and phosphorylation systems (i.e., ptsI, ptsG, galP, glk) while also increasing xylose utilization by introducing specific xylR mutations. Optimization of initial population ratios between complementary sugar specialists proved a key design variable for each pair of strains. In both cases, ∼91% utilization of total sugars was achieved in mineral salt media by simple batch fermentation. High product titer (88 g L-1 D-lactate, 84 g L-1 succinate) and maximum productivity (2.5 g L-1 h-1 D-lactate, 1.3 g L-1 h-1 succinate) and product yield (0.97 g g-total sugar-1 for D-lactate, 0.95 g g-total sugar-1 for succinate) were also achieved.
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Affiliation(s)
- Andrew D. Flores
- Chemical Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, United States
| | - Hyun G. Choi
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Rodrigo Martinez
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Moses Onyeabor
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - E. Zeynep Ayla
- Chemical Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, United States
| | - Amanda Godar
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Michael Machas
- Chemical Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, United States
| | - David R. Nielsen
- Chemical Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, United States
| | - Xuan Wang
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
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