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Xiong Y, Tan L, Chan WK, Yin ES, Donepudi SR, Ding J, Wei B, Tran B, Martinez S, Mahmud I, Stewart HI, Hermanson DJ, Weinstein JN, Lorenzi PL. Ultra-Fast Multi-Organ Proteomics Unveils Tissue-Specific Mechanisms of Drug Efficacy and Toxicity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.09.25.615060. [PMID: 39386681 PMCID: PMC11463356 DOI: 10.1101/2024.09.25.615060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/12/2024]
Abstract
Rapid and comprehensive analysis of complex proteomes across large sample sets is vital for unlocking the potential of systems biology. We present UFP-MS, an ultra-fast mass spectrometry (MS) proteomics method that integrates narrow-window data-independent acquisition (nDIA) with short-gradient micro-flow chromatography, enabling profiling of >240 samples per day. This optimized MS approach identifies 6,201 and 7,466 human proteins with 1- and 2-min gradients, respectively. Our streamlined sample preparation workflow features high-throughput homogenization, adaptive focused acoustics (AFA)-assisted proteolysis, and Evotip-accelerated desalting, allowing for the processing of up to 96 tissue samples in 5 h. As a practical application, we analyzed 507 samples from 13 mouse tissues treated with the enzyme-drug L-asparaginase (ASNase) or its glutaminase-free Q59L mutant, generating a quantitative profile of 11,472 proteins following drug treatment. The MS results confirmed the impact of ASNase on amino acid metabolism in solid tissues. Further analysis revealed broad suppression of anticoagulants and cholesterol metabolism and uncovered numerous tissue-specific dysregulated pathways. In summary, the UFP-MS method greatly accelerates the generation of biological insights and clinically actionable hypotheses into tissue-specific vulnerabilities targeted by ASNase.
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Carneiro FS, Katashima CK, Dodge JD, Cintra DE, Pauli JR, Da Silva ASR, Ropelle ER. Tissue-specific roles of mitochondrial unfolded protein response during obesity. Obes Rev 2024; 25:e13791. [PMID: 38880974 DOI: 10.1111/obr.13791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 03/20/2024] [Accepted: 06/02/2024] [Indexed: 06/18/2024]
Abstract
Obesity is a worldwide multifactorial disease caused by an imbalance in energy metabolism, increasing adiposity, weight gain, and promoting related diseases such as diabetes, cardiovascular diseases, neurodegeneration, and cancer. Recent findings have reported that metabolic stress related to obesity induces a mitochondrial stress response called mitochondrial unfolded protein response (UPRmt), a quality control pathway that occurs in a nuclear DNA-mitochondria crosstalk, causing transduction of chaperones and proteases under stress conditions. The duality of UPRmt signaling, with both beneficial and detrimental effects, acts in different contexts depending on the tissue, cell type, and physiological states, affecting the mitochondrial function and efficiency and the metabolism homeostasis during obesity, which remains not fully clarified. Therefore, this review discusses the most recent findings regarding UPRmt signaling during obesity, bringing an overview of UPRmt across different metabolic tissues.
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Affiliation(s)
- Fernanda S Carneiro
- Laboratory of Molecular Biology of Exercise (LaBMEx), Faculty of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Carlos K Katashima
- Laboratory of Molecular Biology of Exercise (LaBMEx), Faculty of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Joshua D Dodge
- Department of Biology, The University of Texas at Arlington (UTA), Arlington, Texas, USA
| | - Dennys E Cintra
- Laboratory of Nutritional Genomic, School of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - José Rodrigo Pauli
- Laboratory of Molecular Biology of Exercise (LaBMEx), Faculty of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
- Obesity and Comorbidities Research Center (OCRC), University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Adelino S R Da Silva
- Postgraduate Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Eduardo R Ropelle
- Laboratory of Molecular Biology of Exercise (LaBMEx), Faculty of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
- Obesity and Comorbidities Research Center (OCRC), University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
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3
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He J, Chen Y, Zhong W, Jun L, Chen D, Cheng H, Mei W. Insufficient secretion of pancreatic FGF21 is the toxicological mechanism and therapeutic target of asparaginase-associated pancreatitis. Toxicol Appl Pharmacol 2024; 485:116920. [PMID: 38582373 DOI: 10.1016/j.taap.2024.116920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 03/19/2024] [Accepted: 03/31/2024] [Indexed: 04/08/2024]
Abstract
Asparaginase-associated pancreatitis (AAP) is a severe and potentially life-threatening drug-induced pancreas targeted toxicity in the combined chemotherapy of acute lymphoblastic leukemia among children and adolescents. The toxicological mechanism of AAP is not yet clear, and there are no effective preventive and treatment measures available clinically. Fibroblast growth factor 21 (FGF21) is a secretory hormone that regulates lipid, glucose, and energy metabolism balance. Acinar tissue is the main source of pancreatic FGF21 protein and plays an important role in maintaining pancreatic metabolic balance. In this study, we found that the decrease of FGF21 in pancreas is closely related to AAP. Pegaspargase (1 IU/g) induces widespread edema and inflammatory infiltration in the pancreas of rats/mice. The specific expression of FGF21 in the acinar tissue of AAP rats was significantly downregulated. Asparaginase caused dysregulation of the ATF4/ATF3/FGF21 axis in acinar tissue or cells, and thus mediated the decrease of FGF21. It greatly activated ATF3 in the acinar, which competed with ATF4 for the Fgf21 promoter, thereby inhibiting the expression of FGF21. Pharmacological replacement of FGF21 (1 mg/kg) or PERK inhibitors (GSK2656157, 25 mg/kg) can significantly mitigate the pancreatic tissue damage and reduce markers of inflammation associated with AAP, representing potential strategies for the prevention and treatment of AAP.
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Affiliation(s)
- Jiang He
- School of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei 230012, China; Department of Pharmacy, Children's Hospital of Soochow University, Suzhou 215000
| | - Yajing Chen
- Department of Pharmacy, Children's Hospital of Soochow University, Suzhou 215000
| | - Wen Zhong
- Department of Pharmacy, Children's Hospital of Soochow University, Suzhou 215000
| | - Lu Jun
- Department of Pharmacy, Children's Hospital of Soochow University, Suzhou 215000
| | - Dong Chen
- Department of Pharmacy, Children's Hospital of Soochow University, Suzhou 215000
| | - Hui Cheng
- School of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei 230012, China
| | - Wang Mei
- School of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei 230012, China; Department of Pharmacy, Children's Hospital of Soochow University, Suzhou 215000.
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Ali Mahmoud Assar M, Hüffel M, Afify M, Weiskirchen R, Eisert A, Tolba R, Steitz J. Effects of asparaginases and L-carnitine on Western-diet-induced hepatosteatosis in mice. F1000Res 2022; 11:128. [PMID: 37497390 PMCID: PMC10366552 DOI: 10.12688/f1000research.75870.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/21/2022] [Indexed: 07/28/2023] Open
Abstract
Background: Asparaginases are common chemotherapeutic agents used for the treatment of acute lymphoblastic leukemia as a single or combinational therapy. Accompanying hepatotoxicity makes its use in elderly patients with pre-conditions, as obesity or other hepatopathies, difficult. Various hepatoprotective compounds like, L-carnitine, are discussed to ameliorate the induced hepatotoxicity. Methods: Here we aimed to establish a mouse model to study the effect of asparaginases (L-asparaginase and Oncaspar) and L-carnitine on Western-diet-induced hepatosteatosis in mice. Dose-escalation studies were performed to analyze asparaginases induced hepatotoxicity in C57BL/6 mice with normal or fatty livers. Subsequently, the effect of L-carnitine to improve the induced toxicity was tested. Results: Our results showed mild-to-moderate hepatotoxic effects while the Western-diet induced a higher degree of vacuolization and hepatocyte damage in liver tissue. Testing of L-carnitine in the established models did not show any protective effect on the toxicity or impairment of the efficacy of asparaginases. Conclusion: The here established models were able to demonstrate the asparaginase-induced hepatotoxic effects which were enhanced by the Western-diet. However, to test potential ameliorating drugs, the models might need some improvements.
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Affiliation(s)
- Mona Ali Mahmoud Assar
- Institute for Laboratory Animal Science, Faculty of Medicine, RWTH Aachen University., Aachen, Nordrhein Westfalen, 52074, Germany
- Department of Zoology, Faculty of Science, Menoufia University., Shibin Elkom City, Egypt
| | - Martina Hüffel
- Institute for Laboratory Animal Science, Faculty of Medicine, RWTH Aachen University., Aachen, Nordrhein Westfalen, 52074, Germany
| | - Mamdouh Afify
- Department of Pathology, Faculty of Veterinary Medicine, Cairo University, Cairo, Egypt
- Clinic for Cardiology, Angiology and Internal Intensive Medicine Pneumology (Medical Clinic I), Faculty of Medicine, RWTH Aachen University, Aachen, Nordrhein Westfalen, 52074, Germany
| | - Ralf Weiskirchen
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, Faculty of Medicine, RWTH Aachen University, Aachen, Nordrhein Westfalen, 52074, Germany
| | - Albrecht Eisert
- Institute of Clinical Pharmacology, Faculty of Medicine, RWTH Aachen University, Aachen, Germany
- Hospital Pharmacy, University Hospital RWTH Aachen, Aachen, Germany
| | - Rene Tolba
- Institute for Laboratory Animal Science, Faculty of Medicine, RWTH Aachen University., Aachen, Nordrhein Westfalen, 52074, Germany
| | - Julia Steitz
- Institute for Laboratory Animal Science, Faculty of Medicine, RWTH Aachen University., Aachen, Nordrhein Westfalen, 52074, Germany
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Kumar GVN, Hoshitsuki K, Rathod S, Ramsey MJ, Kokai L, Kershaw EE, Xie W, Fernandez CA. Mechanistic studies of PEG-asparaginase-induced liver injury and hepatic steatosis in mice. Acta Pharm Sin B 2021; 11:3779-3790. [PMID: 35024306 PMCID: PMC8727916 DOI: 10.1016/j.apsb.2021.11.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 01/19/2023] Open
Abstract
PEGylated-l-asparaginase (PEG-ASNase) is a chemotherapeutic agent used to treat pediatric acute lymphoblastic leukemia (ALL). Its use is avoided in adults due to its high risk of liver injury including hepatic steatosis, with obesity and older age considered risk factors of the injury. Our study aims to elucidate the mechanism of PEG-ASNase-induced liver injury. Mice received 1500 U/kg of PEG-ASNase and were sacrificed 1, 3, 5, and 7 days after drug administration. Liver triglycerides were quantified, and plasma bilirubin, ALT, AST, and non-esterified fatty acids (NEFA) were measured. The mRNA and protein levels of genes involved in hepatic fatty acid synthesis, β-oxidation, very low-density lipoprotein (VLDL) secretion, and white adipose tissue (WAT) lipolysis were determined. Mice developed hepatic steatosis after PEG-ASNase, which associated with increases in bilirubin, ALT, and AST. The hepatic genes Ppara, Lcad/Mcad, Hadhb, Apob100, and Mttp were upregulated, and Srebp-1c and Fas were downregulated after PEG-ASNase. Increased plasma NEFA, WAT loss, and adipose tissue lipolysis were also observed after PEG-ASNase. Furthermore, we found that PEG-ASNase-induced liver injury was exacerbated in obese and aged mice, consistent with clinical studies of ASNase-induced liver injury. Our data suggest that PEG-ASNase-induced liver injury is due to drug-induced lipolysis and lipid redistribution to the liver.
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Affiliation(s)
- Gundala Venkata Naveen Kumar
- Department of Pharmaceutical Sciences and Center for Pharmacogenetics, University of Pittsburgh School of Pharmacy, Pittsburgh, PA 15261, USA
| | - Keito Hoshitsuki
- Department of Pharmaceutical Sciences and Center for Pharmacogenetics, University of Pittsburgh School of Pharmacy, Pittsburgh, PA 15261, USA
- Division of General Internal Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Sanjay Rathod
- Department of Pharmaceutical Sciences and Center for Pharmacogenetics, University of Pittsburgh School of Pharmacy, Pittsburgh, PA 15261, USA
| | - Manda J. Ramsey
- Department of Pharmaceutical Sciences and Center for Pharmacogenetics, University of Pittsburgh School of Pharmacy, Pittsburgh, PA 15261, USA
| | - Lauren Kokai
- Department of Plastic Surgery, University of Pittsburgh and the McGowan Institute for Regenerative Medicine, Pittsburgh, PA 15261, USA
| | - Erin E. Kershaw
- University of Pittsburgh, Division of Endocrinology, Department of Medicine, Pittsburgh, PA 15261, USA
| | - Wen Xie
- Department of Pharmaceutical Sciences and Center for Pharmacogenetics, University of Pittsburgh School of Pharmacy, Pittsburgh, PA 15261, USA
| | - Christian A. Fernandez
- Department of Pharmaceutical Sciences and Center for Pharmacogenetics, University of Pittsburgh School of Pharmacy, Pittsburgh, PA 15261, USA
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6
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Byles V, Cormerais Y, Kalafut K, Barrera V, Hughes Hallett JE, Sui SH, Asara JM, Adams CM, Hoxhaj G, Ben-Sahra I, Manning BD. Hepatic mTORC1 signaling activates ATF4 as part of its metabolic response to feeding and insulin. Mol Metab 2021; 53:101309. [PMID: 34303878 PMCID: PMC8368025 DOI: 10.1016/j.molmet.2021.101309] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 07/14/2021] [Accepted: 07/19/2021] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE The mechanistic target of rapamycin complex 1 (mTORC1) is dynamically regulated by fasting and feeding cycles in the liver to promote protein and lipid synthesis while suppressing autophagy. However, beyond these functions, the metabolic response of the liver to feeding and insulin signaling orchestrated by mTORC1 remains poorly defined. Here, we determine whether ATF4, a stress responsive transcription factor recently found to be independently regulated by mTORC1 signaling in proliferating cells, is responsive to hepatic mTORC1 signaling to alter hepatocyte metabolism. METHODS ATF4 protein levels and expression of canonical gene targets were analyzed in the liver following fasting and physiological feeding in the presence or absence of the mTORC1 inhibitor, rapamycin. Primary hepatocytes from wild-type or liver-specific Atf4 knockout (LAtf4KO) mice were used to characterize the effects of insulin-stimulated mTORC1-ATF4 function on hepatocyte gene expression and metabolism. Both unbiased steady-state metabolomics and stable-isotope tracing methods were employed to define mTORC1 and ATF4-dependent metabolic changes. RNA-sequencing was used to determine global changes in feeding-induced transcripts in the livers of wild-type versus LAtf4KO mice. RESULTS We demonstrate that ATF4 and its metabolic gene targets are stimulated by mTORC1 signaling in the liver, in a hepatocyte-intrinsic manner by insulin in response to feeding. While we demonstrate that de novo purine and pyrimidine synthesis is stimulated by insulin through mTORC1 signaling in primary hepatocytes, this regulation was independent of ATF4. Metabolomics and metabolite tracing studies revealed that insulin-mTORC1-ATF4 signaling stimulates pathways of nonessential amino acid synthesis in primary hepatocytes, including those of alanine, aspartate, methionine, and cysteine, but not serine. CONCLUSIONS The results demonstrate that ATF4 is a novel metabolic effector of mTORC1 in the liver, extending the molecular consequences of feeding and insulin-induced mTORC1 signaling in this key metabolic tissue to the control of amino acid metabolism.
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Affiliation(s)
- Vanessa Byles
- Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Yann Cormerais
- Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Krystle Kalafut
- Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Victor Barrera
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - James E Hughes Hallett
- Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Shannan Ho Sui
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - John M Asara
- Division of Signal Transduction, Beth Israel Deaconess Medical Center and Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Christopher M Adams
- Division of Endocrinology, Metabolism and Nutrition, Mayo Clinic, Rochester, MN, USA
| | - Gerta Hoxhaj
- Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA, USA; Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Issam Ben-Sahra
- Department of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine and Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, USA
| | - Brendan D Manning
- Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
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7
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Schulte R, Hinson A, Huynh V, Breese EH, Pierro J, Rotz S, Mixon BA, McNeer JL, Burke MJ, Orgel E. Levocarnitine for pegaspargase-induced hepatotoxicity in older children and young adults with acute lymphoblastic leukemia. Cancer Med 2021; 10:7551-7560. [PMID: 34528411 PMCID: PMC8559504 DOI: 10.1002/cam4.4281] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 08/11/2021] [Accepted: 08/17/2021] [Indexed: 12/19/2022] Open
Abstract
Background Pegaspargase (PEG‐ASP) is an integral component of therapy for acute lymphoblastic leukemia (ALL) but is associated with hepatotoxicity that may delay or limit future therapy. Obese and adolescent and young adult (AYA) patients are at high risk. Levocarnitine has been described as potentially beneficial for the treatment or prevention of PEG‐ASP‐associated hepatotoxicity. Methods We collected data for patients age ≥10 years who received levocarnitine during induction therapy for ALL, compared to a similar patient cohort who did not receive levocarnitine. The primary endpoint was conjugated bilirubin (c.bili) >3 mg/dl. Secondary endpoints were transaminases >10× the upper limit of normal and any Grade ≥3 hepatotoxicity. Results Fifty‐two patients received levocarnitine for prophylaxis (n = 29) or rescue (n = 32) of hepatotoxicity. Compared to 109 patients without levocarnitine, more patients receiving levocarnitine were obese and/or older and had significantly higher values for some hepatotoxicity markers at diagnosis and after PEG‐ASP. Levocarnitine regimens varied widely; no adverse effects of levocarnitine were identified. Obesity and AYA status were associated with an increased risk of conjugated hyperbilirubinemia and severe transaminitis. Multivariable analysis identified a protective effect of levocarnitine on the development of c.bili >3 mg/dl (OR 0.12, p = 0.029). There was no difference between groups in CTCAE Grade ≥3 hepatotoxicity. C.bili >3 mg/dl during induction was associated with lower event‐free survival. Conclusions This real‐world data on levocarnitine supplementation during ALL induction highlights the risk of PEG‐ASP‐associated hepatotoxicity in obese and AYA patients, and hepatotoxicity's potential impact on survival. Levocarnitine supplementation may be protective, but prospective studies are needed to confirm these findings.
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Affiliation(s)
- Rachael Schulte
- Division of Pediatric Hematology and Oncology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Ashley Hinson
- Division of Pediatric Hematology and Oncology, Levine Children's Atrium Health, Charlotte, North Carolina, USA
| | - Van Huynh
- Division of Pediatric Oncology, University of California Irvine College of Medicine, CHOC Children's Hospital, Orange, California, USA
| | - Erin H Breese
- Division of Oncology, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center/University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Joanna Pierro
- Division of Pediatric Hematology/Oncology, NYU Grossman School of Medicine, Perlmutter Cancer Center, Hassenfeld Children's Hospital at NYU Langone Health, New York, New York, USA
| | - Seth Rotz
- Department of Pediatric Hematology, Oncology, and Blood and Marrow Transplantation, Pediatric Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Benjamin A Mixon
- Department of Pediatrics, University of Tennessee College of Medicine Chattanooga and Children's Hospital at Erlanger, Chattanooga, Tennessee, USA
| | - Jennifer L McNeer
- Section of Pediatric Hematology, Oncology, and Stem Cell Transplant, University of Chicago Comer Children's Hospital, Chicago, Illinois, USA
| | - Michael J Burke
- Division of Pediatric Hematology/Oncology and Blood and Marrow Transplantation, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Etan Orgel
- Cancer and Blood Disease Institute, Children's Hospital Los Angeles/University of Southern California, Los Angeles, California, USA
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8
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Misra J, Holmes MJ, T Mirek E, Langevin M, Kim HG, Carlson KR, Watford M, Dong XC, Anthony TG, Wek RC. Discordant regulation of eIF2 kinase GCN2 and mTORC1 during nutrient stress. Nucleic Acids Res 2021; 49:5726-5742. [PMID: 34023907 PMCID: PMC8191763 DOI: 10.1093/nar/gkab362] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 04/07/2021] [Accepted: 04/23/2021] [Indexed: 11/13/2022] Open
Abstract
Appropriate regulation of the Integrated stress response (ISR) and mTORC1 signaling are central for cell adaptation to starvation for amino acids. Halofuginone (HF) is a potent inhibitor of aminoacylation of tRNAPro with broad biomedical applications. Here, we show that in addition to translational control directed by activation of the ISR by general control nonderepressible 2 (GCN2), HF increased free amino acids and directed translation of genes involved in protein biogenesis via sustained mTORC1 signaling. Deletion of GCN2 reduced cell survival to HF whereas pharmacological inhibition of mTORC1 afforded protection. HF treatment of mice synchronously activated the GCN2-mediated ISR and mTORC1 in liver whereas Gcn2-null mice allowed greater mTORC1 activation to HF, resulting in liver steatosis and cell death. We conclude that HF causes an amino acid imbalance that uniquely activates both GCN2 and mTORC1. Loss of GCN2 during HF creates a disconnect between metabolic state and need, triggering proteostasis collapse.
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Affiliation(s)
- Jagannath Misra
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202 USA
| | - Michael J Holmes
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202 USA.,Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN 46202 USA
| | - Emily T Mirek
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ 08901 USA
| | - Michael Langevin
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ 08901 USA
| | - Hyeong-Geug Kim
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202 USA
| | - Kenneth R Carlson
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202 USA
| | - Malcolm Watford
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ 08901 USA
| | - X Charlie Dong
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202 USA.,Department of BioHealth Informatics, School of Informatics and Computing, Indiana University Purdue University Indianapolis, Indianapolis, IN, USA
| | - Tracy G Anthony
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ 08901 USA
| | - Ronald C Wek
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202 USA
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9
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Jonsson WO, Margolies NS, Mirek ET, Zhang Q, Linden MA, Hill CM, Link C, Bithi N, Zalma B, Levy JL, Pettit AP, Miller JW, Hine C, Morrison CD, Gettys TW, Miller BF, Hamilton KL, Wek RC, Anthony TG. Physiologic Responses to Dietary Sulfur Amino Acid Restriction in Mice Are Influenced by Atf4 Status and Biological Sex. J Nutr 2021; 151:785-799. [PMID: 33512502 PMCID: PMC8030708 DOI: 10.1093/jn/nxaa396] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/19/2020] [Accepted: 11/17/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Dietary sulfur amino acid restriction (SAAR) improves body composition and metabolic health across several model organisms in part through induction of the integrated stress response (ISR). OBJECTIVE We investigate the hypothesis that activating transcription factor 4 (ATF4) acts as a converging point in the ISR during SAAR. METHODS Using liver-specific or global gene ablation strategies, in both female and male mice, we address the role of ATF4 during dietary SAAR. RESULTS We show that ATF4 is dispensable in the chronic induction of the hepatokine fibroblast growth factor 21 while being essential for the sustained production of endogenous hydrogen sulfide. We also affirm that biological sex, independent of ATF4 status, is a determinant of the response to dietary SAAR. CONCLUSIONS Our results suggest that auxiliary components of the ISR, which are independent of ATF4, are critical for SAAR-mediated improvements in metabolic health in mice.
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Affiliation(s)
- William O Jonsson
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ, USA
| | | | - Emily T Mirek
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ, USA
| | - Qian Zhang
- Department of Health and Exercise Science, Colorado State University, Ft. Collins, CO, USA
| | - Melissa A Linden
- Department of Health and Exercise Science, Colorado State University, Ft. Collins, CO, USA
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, USA
| | - Cristal M Hill
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, USA
| | - Christopher Link
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner Research Institute, Cleveland, OH, USA
| | - Nazmin Bithi
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner Research Institute, Cleveland, OH, USA
| | - Brian Zalma
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ, USA
| | - Jordan L Levy
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ, USA
| | - Ashley P Pettit
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ, USA
| | - Joshua W Miller
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ, USA
| | - Christopher Hine
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner Research Institute, Cleveland, OH, USA
| | | | - Thomas W Gettys
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, USA
| | - Benjamin F Miller
- Aging & Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Karyn L Hamilton
- Department of Health and Exercise Science, Colorado State University, Ft. Collins, CO, USA
| | - Ronald C Wek
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Tracy G Anthony
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ, USA
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10
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Philips AM, Khan N. Amino acid sensing pathway: A major check point in the pathogenesis of obesity and COVID-19. Obes Rev 2021; 22:e13221. [PMID: 33569904 PMCID: PMC7995014 DOI: 10.1111/obr.13221] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 01/15/2021] [Accepted: 01/22/2021] [Indexed: 12/13/2022]
Abstract
Obesity and obesogenic comorbidities have been associated with COVID-19 susceptibility and mortality. However, the mechanism of such correlations requires an in-depth understanding. Overnutrition/excess serum amino acid profile during obesity has been linked with inflammation and reprogramming of translational machinery through hyperactivation of amino acid sensor mammalian target of rapamycin (mTOR), which is exploited by SARS-CoV-2 for its replication. Conversely, we have shown that the activation of general control nonderepressible 2 (GCN2)-dependent amino acid starvation sensing pathway suppresses intestinal inflammation by inhibiting the production of reactive oxygen species (ROS) and interleukin-1 beta (IL-1β). While activation of GCN2 has shown to mitigate susceptibility to dengue infection, GCN2 deficiency increases viremia and inflammation-associated pathologies. These findings reveal that the amino acid sensing pathway plays a significant role in controlling inflammation and viral infections. The current fact is that obesity/excess amino acids/mTOR activation aggravates COVID-19, and it might be possible that activation of amino acid starvation sensor GCN2 has an opposite effect. This article focuses on the amino acid sensing pathways through which host cells sense the availability of amino acids and reprogram the host translation machinery to mount an effective antiviral response. Besides, how SARS-CoV-2 hijack and exploit amino acid sensing pathway for its replication and pathogenesis is also discussed.
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Affiliation(s)
- Aradhana Mariam Philips
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Nooruddin Khan
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad, India
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11
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Annett S, Moore G, Robson T. Obesity and Cancer Metastasis: Molecular and Translational Perspectives. Cancers (Basel) 2020; 12:E3798. [PMID: 33339340 PMCID: PMC7766668 DOI: 10.3390/cancers12123798] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 02/06/2023] Open
Abstract
Obesity is a modern health problem that has reached pandemic proportions. It is an established risk factor for carcinogenesis, however, evidence for the contribution of adipose tissue to the metastatic behavior of tumors is also mounting. Over 90% of cancer mortality is attributed to metastasis and metastatic tumor cells must communicate with their microenvironment for survival. Many of the characteristics observed in obese adipose tissue strongly mirror the tumor microenvironment. Thus in the case of prostate, pancreatic and breast cancer and esophageal adenocarcinoma, which are all located in close anatomical proximity to an adipose tissue depot, the adjacent fat provides an ideal microenvironment to enhance tumor growth, progression and metastasis. Adipocytes provide adipokines, fatty acids and other soluble factors to tumor cells whilst immune cells infiltrate the tumor microenvironment. In addition, there are emerging studies on the role of the extracellular vesicles secreted from adipose tissue, and the extracellular matrix itself, as drivers of obesity-induced metastasis. In the present review, we discuss the major mechanisms responsible for the obesity-metastatic link. Furthermore, understanding these complex mechanisms will provide novel therapies to halt the tumor-adipose tissue crosstalk with the ultimate aim of inhibiting tumor progression and metastatic growth.
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Affiliation(s)
| | | | - Tracy Robson
- School of Pharmacy and Biomolecular Sciences, RCSI University of Medicine and Health Science, 123 St Stephen’s Green, Dublin D02 YN77, Ireland; (S.A.); (G.M.)
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12
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Multiple Severe Toxicities of L-Asparaginase and Their Innovative Management during Induction Therapy of Acute Lymphoblastic Leukemia in an Adult Patient. Case Rep Hematol 2019; 2019:9086570. [PMID: 31827950 PMCID: PMC6886342 DOI: 10.1155/2019/9086570] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 11/02/2019] [Indexed: 11/18/2022] Open
Abstract
L-asparaginase is a key chemotherapeutic agent in acute lymphoblastic leukemia (ALL). It is also known for multiple and severe specific toxicities, without consensual management. We report the case of a 51-year-old man treated with L-asparaginase for recently diagnosed T-cell ALL. During the treatment, he developed a coma due to multifactorial diffuse cerebral edema, by hepatic encephalopathy, cerebral venous thrombosis, and hyperammonemia, all linked to toxicity of L-asparaginase. Specific and innovative treatments were employed to manage these toxicities: supplementation with L-carnitine, thiamine, and pyridoxine for hepatic toxicity, perfusion of sodium benzoate to decrease ammonemia, and extrahepatic albumin-based dialysis sessions, along with anticoagulation. The patient improved within two weeks and is currently alive 13 months later, in first complete remission, without sequelae, on an alleviated chemotherapy regimen.
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13
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Nikonorova IA, Zhu Q, Signore CC, Mirek ET, Jonsson WO, Kong B, Guo GL, Belden WJ, Anthony TG. Age modulates liver responses to asparaginase-induced amino acid stress in mice. J Biol Chem 2019; 294:13864-13875. [PMID: 31413113 DOI: 10.1074/jbc.ra119.009864] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 08/06/2019] [Indexed: 11/06/2022] Open
Abstract
Asparaginase is an amino acid-depleting agent used to treat blood cancers. Metabolic complications due to asparaginase affect liver function in humans. To examine how the liver response to asparaginase changes during maturity to adulthood, here we treated juvenile (2-week), young adult (8-week), and mature adult (16-week) mice with drug or excipient for 1 week and conducted RNA-Seq and functional analyses. Asparaginase reduced body growth and liver mass in juveniles but not in the adult animals. Unbiased exploration of the effect of asparaginase on the liver transcriptome revealed that the integrated stress response (ISR) was the only molecular signature shared across the ages, corroborating similar eukaryotic initiation factor 2 phosphorylation responses to asparaginase at all ages. Juvenile livers exhibited steatosis and iron accumulation following asparaginase exposure along with a hepatic gene signature indicating that asparaginase uniquely affects lipid, cholesterol, and iron metabolism in juvenile mice. In contrast, asparaginase-treated adult mice displayed greater variability in liver function, which correlated with an acute-phase inflammatory response gene signature. Asparaginase-exposed adults also had a serine/glycine/one-carbon metabolism gene signature in liver that corresponded with reduced circulating glycine and serine levels. These results establish the ISR as a conserved response to asparaginase-mediated amino acid deprivation and provide new insights into the relationship between the liver transcriptome and hepatic function upon asparaginase exposure.
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Affiliation(s)
- Inna A Nikonorova
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey 08901
| | - Qiaoqiao Zhu
- Department of Animal Sciences, Rutgers University, New Brunswick, New Jersey 08901
| | - Christina C Signore
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey 08901
| | - Emily T Mirek
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey 08901
| | - William O Jonsson
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey 08901
| | - Bo Kong
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey 08854
| | - Grace L Guo
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey 08854
| | - William J Belden
- Department of Animal Sciences, Rutgers University, New Brunswick, New Jersey 08901
| | - Tracy G Anthony
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey 08901
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14
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Mukherjee A, Ahmed N, Rose FT, Ahmad AN, Javed TA, Wen L, Bottino R, Xiao X, Kilberg MS, Husain SZ. Asparagine Synthetase Is Highly Expressed at Baseline in the Pancreas Through Heightened PERK Signaling. Cell Mol Gastroenterol Hepatol 2019; 9:1-13. [PMID: 31421261 PMCID: PMC6881672 DOI: 10.1016/j.jcmgh.2019.08.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 08/06/2019] [Accepted: 08/07/2019] [Indexed: 01/25/2023]
Abstract
Asparaginase (ASNase) causes pancreatitis in approximately 10% of leukemia patients, and the mechanisms underlying this painful complication are not known. ASNase primarily depletes circulating asparagine, and the endogenously expressed enzyme, asparagine synthetase (ASNS), replenishes asparagine. ASNS was suggested previously to be highly expressed in the pancreas. In this study, we determined the expression pattern of ASNS in the pancreas and the mechanism for increased pancreatic ASNS abundance. Compared with other organs, ASNS was highly expressed in both the human and mouse pancreas, and, within the pancreas, ASNS was present primarily in the acinar cells. The high baseline pancreatic ASNS was associated with higher baseline activation of protein kinase R-like endoplasmic reticulum kinase (PERK) signaling in the pancreas, and inhibition of PERK in acinar cells lessened ASNS expression. ASNase exposure, but not the common pancreatitis triggers, uniquely up-regulated ASNS expression, indicating that the increase is mediated by nutrient stress. The up-regulation of acinar ASNS with ASNase exposure was owing to increased transcriptional rather than delayed degradation. Knockdown of ASNS in the 266-6 acinar cells provoked acinar cell injury and worsened ASNase-induced injury, whereas ASNS overexpression protected against ASNase-induced injury. In summary, ASNS is highly expressed in the pancreatic acinar cells through heightened basal activation of PERK, and ASNS appears to be crucial to maintaining acinar cell integrity. The implications are that ASNS is especially hardwired in the pancreas to protect against both baseline perturbations and nutrient deprivation stressors, such as during ASNase exposure.
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Affiliation(s)
- Amitava Mukherjee
- Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Nayyar Ahmed
- Division of Natural Sciences, University of Pittsburgh at Greensburg, Greensburg, Pennsylvania
| | - Fateema T Rose
- Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Abraheem N Ahmad
- Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Tanveer A Javed
- Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Li Wen
- Department of Gastroenterology, Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Rita Bottino
- Institute of Cellular Therapeutics, Allegheny-Singer Research Institute, Allegheny Health Network, Pittsburgh, Pennsylvania
| | - Xiangwei Xiao
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Michael S Kilberg
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida
| | - Sohail Z Husain
- Department of Pediatrics, Stanford University, Palo Alto, California.
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15
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Zeng N, D'Souza RF, Figueiredo VC, Markworth JF, Roberts LA, Peake JM, Mitchell CJ, Cameron-Smith D. Acute resistance exercise induces Sestrin2 phosphorylation and p62 dephosphorylation in human skeletal muscle. Physiol Rep 2018; 5:5/24/e13526. [PMID: 29263116 PMCID: PMC5742699 DOI: 10.14814/phy2.13526] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 11/02/2017] [Accepted: 11/03/2017] [Indexed: 02/07/2023] Open
Abstract
Sestrins (1, 2, 3) are a family of stress-inducible proteins capable of attenuating oxidative stress, regulating metabolism, and stimulating autophagy. Sequestosome1 (p62) is also a stress-inducible multifunctional protein acting as a signaling hub for oxidative stress and selective autophagy. It is unclear whether Sestrin and p62Ser403 are regulated acutely or chronically by resistance exercise (RE) or training (RT) in human skeletal muscle. Therefore, the acute and chronic effects of RE on Sestrin and p62 in human skeletal muscle were examined through two studies. In Study 1, nine active men (22.1 ± 2.2 years) performed a bout of single-leg strength exercises and muscle biopsies were collected before, 2, 24, and 48 h after exercise. In Study 2, 10 active men (21.3 ± 1.9 years) strength trained for 12 weeks (2 days per week) and biopsies were collected pre- and post-training. Acutely, 2 h postexercise, phosphorylation of p62Ser403 was downregulated, while there was a mobility shift of Sestrin2, indicative of increased phosphorylation. Forty-eight hours postexercise, the protein expression of both Sestrin1 and total p62 increased. Chronic exercise had no impact on the gene or protein expression of Sestrin2/3 or p62, but Sestrin1 protein was upregulated. These findings demonstrated an inverse relationship between Sestrin2 and p62 phosphorylation after a single bout of RE, indicating they are transiently regulated. Contrarily, 12 weeks of RT increased protein expression of Sestrin1, suggesting that despite the strong sequence homology of the Sestrin family, they are differentially regulated in response to acute RE and chronic RT.
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Affiliation(s)
- Nina Zeng
- Liggins Institute The University of Auckland, Private Bag 92019, Victoria Street West, Auckland, 1142, New Zealand
| | - Randall F D'Souza
- Liggins Institute The University of Auckland, Private Bag 92019, Victoria Street West, Auckland, 1142, New Zealand
| | - Vandre C Figueiredo
- Liggins Institute The University of Auckland, Private Bag 92019, Victoria Street West, Auckland, 1142, New Zealand.,Centre for Muscle Biology, College of Health Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - James F Markworth
- Liggins Institute The University of Auckland, Private Bag 92019, Victoria Street West, Auckland, 1142, New Zealand.,Department of Orthopedic Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Llion A Roberts
- School of Allied Health Sciences & Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia.,Sport Performance Innovation and Knowledge Excellence, Queensland Academy of Sport, Brisbane, Australia
| | - Jonathan M Peake
- Sport Performance Innovation and Knowledge Excellence, Queensland Academy of Sport, Brisbane, Australia.,School of Biomedical Sciences and Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Cameron J Mitchell
- Liggins Institute The University of Auckland, Private Bag 92019, Victoria Street West, Auckland, 1142, New Zealand
| | - David Cameron-Smith
- Liggins Institute The University of Auckland, Private Bag 92019, Victoria Street West, Auckland, 1142, New Zealand .,Food & Bio-based Products Group, AgResearch, Palmerston North, 4474, New Zealand.,Riddet Institute, Palmerston North, 4442, New Zealand
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16
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Zeng N, D'Souza RF, Sorrenson B, Merry TL, Barnett MPG, Mitchell CJ, Cameron-Smith D. The putative leucine sensor Sestrin2 is hyperphosphorylated by acute resistance exercise but not protein ingestion in human skeletal muscle. Eur J Appl Physiol 2018; 118:1241-1253. [PMID: 29574525 DOI: 10.1007/s00421-018-3853-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 03/21/2018] [Indexed: 12/29/2022]
Abstract
PURPOSE Dietary protein and resistance exercise (RE) are both potent stimuli of the mammalian target of rapamycin complex 1 (mTORC1). Sestrins1, 2, 3 are multifunctional proteins that regulate mTORC1, stimulate autophagy and alleviate oxidative stress. Of this family, Sestrin2 is a putative leucine sensor implicated in mTORC1 and AMP-dependent protein kinase (AMPK) regulation. There is currently no data examining the responsiveness of Sestrin2 to dietary protein ingestion, with or without RE. METHODS In Study 1, 16 males ingested either 10 or 20 g of milk protein concentrate (MPC) with muscle biopsies collected pre, 90 and 210 min post-beverage consumption. In Study 2, 20 males performed a bout of RE immediately followed by the consumption of 9 g of MPC or carbohydrate placebo. Analysis of Sestrins, AMPK and antioxidant responses was examined. RESULTS Dietary protein ingestion did not result in Sestrin2 mobility shift. After RE, Sestrin2 phosphorylation state was significantly altered and was not further modified by post-exercise protein or carbohydrate ingestion. With RE, AMPK phosphorylation remained stable, while the mRNA expressions of several antioxidants were upregulated. CONCLUSIONS Dietary protein ingestion did not affect the signalling by the family of Sestrins. With RE, Sestrin2 was hyperphosphorylated, with no further evidence of a relationship to AMPK signalling.
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Affiliation(s)
- Nina Zeng
- Liggins Institute, The University of Auckland, Private Bag 92 019, Victoria Street West, Auckland, 1142, New Zealand
| | - Randall F D'Souza
- Liggins Institute, The University of Auckland, Private Bag 92 019, Victoria Street West, Auckland, 1142, New Zealand
| | - Brie Sorrenson
- Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Auckland, New Zealand
| | - Troy L Merry
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Auckland, New Zealand
- Discipline of Nutrition, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Matthew P G Barnett
- Food Nutrition and Health Team, AgResearch, Palmerston North, 4474, New Zealand
| | - Cameron J Mitchell
- Liggins Institute, The University of Auckland, Private Bag 92 019, Victoria Street West, Auckland, 1142, New Zealand
| | - David Cameron-Smith
- Liggins Institute, The University of Auckland, Private Bag 92 019, Victoria Street West, Auckland, 1142, New Zealand.
- Food and Bio-based Products Group, AgResearch, Palmerston North, 4474, New Zealand.
- Riddet Institute, Palmerston North, 4442, New Zealand.
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17
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Downregulation of PERK activity and eIF2α serine 51 phosphorylation by mTOR complex 1 elicits pro-oxidant and pro-death effects in tuberous sclerosis-deficient cells. Cell Death Dis 2018; 9:254. [PMID: 29449538 PMCID: PMC5833713 DOI: 10.1038/s41419-018-0326-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 01/12/2018] [Accepted: 01/18/2018] [Indexed: 12/11/2022]
Abstract
Oxidative stress determines cell fate through several mechanisms, among which regulation of mRNA translation by the phosphorylation of the alpha (α) subunit of the translation initiation factor eIF2α at serine 51 (eIF2αP) plays a prominent role. Increased eIF2αP can contribute to tumor progression as well as tumor suppression. While eIF2αP is increased in most cells to promote survival and adaptation to different forms of stress, we demonstrate that eIF2αP is reduced in tuberous sclerosis complex 2 (TSC2)-deficient cells subjected to oxidative insults. Decreased eIF2αP in TSC2-deficient cells depends on reactive oxygen species (ROS) production and is associated with a reduced activity of the endoplasmic reticulum (ER)-resident kinase PERK owing to the hyper-activation of the mammalian target of rapamycin complex 1 (mTORC1). Downregulation of PERK activity and eIF2αP is accompanied by increased ROS production and enhanced susceptibility of TSC2-deficient cells to extrinsic pro-oxidant stress. The decreased levels of eIF2αP delay tumor formation of TSC2-deficient cells in immune deficient mice, an effect that is significantly alleviated in mice subjected to an anti-oxidant diet. Our findings reveal a previously unidentified connection between mTORC1 and eIF2αP in TSC2-deficient cells with potential implications in tumor suppression in response to oxidative insults.
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18
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Nikonorova IA, Mirek ET, Signore CC, Goudie MP, Wek RC, Anthony TG. Time-resolved analysis of amino acid stress identifies eIF2 phosphorylation as necessary to inhibit mTORC1 activity in liver. J Biol Chem 2018; 293:5005-5015. [PMID: 29449374 DOI: 10.1074/jbc.ra117.001625] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 01/26/2018] [Indexed: 12/31/2022] Open
Abstract
Amino acid availability is sensed by GCN2 (general control nonderepressible 2) and mechanistic target of rapamycin complex 1 (mTORC1), but how these two sensors coordinate their respective signal transduction events remains mysterious. In this study we utilized mouse genetic models to investigate the role of GCN2 in hepatic mTORC1 regulation upon amino acid stress induced by a single injection of asparaginase. We found that deletion of Gcn2 prevented hepatic phosphorylation of eukaryotic initiation factor 2α to asparaginase and instead unleashed mTORC1 activity. This change in intracellular signaling occurred within minutes and resulted in increased 5'-terminal oligopyrimidine mRNA translation instead of activating transcription factor 4 synthesis. Asparaginase also promoted hepatic mRNA levels of several genes which function as mTORC1 inhibitors, and these genes were blunted or blocked in the absence of Gcn2, but their timing could not explain the early discordant effects in mTORC1 signaling. Preconditioning mice with a chemical endoplasmic reticulum stress agent before amino acid stress rescued normal mTORC1 repression in the liver of Gcn2-/- mice but not in livers with both Gcn2 and the endoplasmic reticulum stress kinase, Perk, deleted. Furthermore, treating wildtype and Gcn2-/- mice with ISRIB, an inhibitor of PERK signaling, also failed to alter hepatic mTORC1 responses to asparaginase, although administration of ISRIB alone had an inhibitory GCN2-independent effect on mTORC1 activity. Taken together, the data show that activating transcription factor 4 is not required, but eukaryotic initiation factor 2α phosphorylation is necessary to prevent mTORC1 activation during amino acid stress.
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Affiliation(s)
- Inna A Nikonorova
- From the Department of Nutritional Sciences, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901 and
| | - Emily T Mirek
- From the Department of Nutritional Sciences, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901 and
| | - Christina C Signore
- From the Department of Nutritional Sciences, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901 and
| | - Michael P Goudie
- From the Department of Nutritional Sciences, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901 and
| | - Ronald C Wek
- the Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202
| | - Tracy G Anthony
- From the Department of Nutritional Sciences, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901 and
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19
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Schulte RR, Madiwale MV, Flower A, Hochberg J, Burke MJ, McNeer JL, DuVall A, Bleyer A. Levocarnitine for asparaginase-induced hepatic injury: a multi-institutional case series and review of the literature. Leuk Lymphoma 2018; 59:2360-2368. [PMID: 29431566 PMCID: PMC10183102 DOI: 10.1080/10428194.2018.1435873] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Asparaginase, an important treatment component for acute lymphoblastic leukemia (ALL), causes severe hepatotoxicity in some patients. Levocarnitine is a mitochondrial co-factor that can potentially ameliorate the mitochondrial toxicity of asparaginase. In this retrospective case series, we describe the clinical presentation and management of six pediatric and young adult patients (mean age 12.7, range 9-24 years) with ALL who developed Grade 3-4 hyperbilirubinemia following administration of asparaginase as part of induction/re-induction therapy. Five of these patients were treated with levocarnitine with subsequent improvement of hyperbilirubinemia, while one patient was given levocarnitine prophylactically during induction and developed Grade 3 hyperbilirubinemia, but did not require therapy adjustments or delays. Increased awareness in the pediatric oncology community regarding asparaginase-associated hepatic toxicity and the potential role of levocarnitine in management is warranted.
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Affiliation(s)
- Rachael R Schulte
- a Department of Pediatrics, Division of Pediatric Hematology/Oncology , Monroe Carell Jr. Children's Hospital, Vanderbilt University Medical Center , Nashville , TN , USA
| | - Manasi V Madiwale
- b Division of Pediatric Hematology/Oncology , Children's Hospital and Research Center , Oakland , CA , USA
| | - Allyson Flower
- c Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation , New York Medical College , Valhalla , NY , USA
| | - Jessica Hochberg
- c Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation , New York Medical College , Valhalla , NY , USA
| | - Michael J Burke
- d Department of Pediatrics, Division of Hematology/Oncology/Blood and Marrow Transplantation , Medical College of Wisconsin , Milwaukee , WI , USA
| | - Jennifer L McNeer
- e Department of Pediatrics, Section of Pediatric Hematology/Oncology/Stem Cell Transplant , University of Chicago Medical Center , Chicago , IL , USA
| | - Adam DuVall
- f Department of Medicine, Division of Hematology and Medical Oncology, and Department of Pediatrics, Division of Pediatric Hematology/Oncology, OHSU Doernbecher Children's Hospital , Oregon Health and Science University , Portland , OR , USA
| | - Archie Bleyer
- g Department of Radiation Medicine , Oregon Health and Science University , Portland , OR , USA
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20
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Al-Baghdadi RJT, Nikonorova IA, Mirek ET, Wang Y, Park J, Belden WJ, Wek RC, Anthony TG. Role of activating transcription factor 4 in the hepatic response to amino acid depletion by asparaginase. Sci Rep 2017; 7:1272. [PMID: 28455513 PMCID: PMC5430736 DOI: 10.1038/s41598-017-01041-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 03/17/2017] [Indexed: 12/18/2022] Open
Abstract
The anti-leukemic agent asparaginase activates the integrated stress response (ISR) kinase GCN2 and inhibits signaling via mechanistic target of rapamycin complex 1 (mTORC1). The study objective was to investigate the protective role of activating transcription factor 4 (ATF4) in controlling the hepatic transcriptome and mediating GCN2-mTORC1 signaling during asparaginase. We compared global gene expression patterns in livers from wildtype, Gcn2−/−, and Atf4−/− mice treated with asparaginase or excipient and further explored selected responses in livers from Atf4+/− mice. Here, we show that ATF4 controls a hepatic gene expression profile that overlaps with GCN2 but is not required for downregulation of mTORC1 during asparaginase. Ingenuity pathway analysis indicates GCN2 independently influences inflammation-mediated hepatic processes whereas ATF4 uniquely associates with cholesterol metabolism and endoplasmic reticulum (ER) stress. Livers from Atf4−/− or Atf4+/− mice displayed an amplification of the amino acid response and ER stress response transcriptional signatures. In contrast, reduction in hepatic mTORC1 signaling was retained in Atf4−/− mice treated with asparaginase. Conclusions: GCN2 and ATF4 serve complementary roles in the hepatic response to asparaginase. GCN2 functions to limit inflammation and mTORC1 signaling whereas ATF4 serves to limit the amino acid response and prevent ER stress during amino acid depletion by asparaginase.
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Affiliation(s)
- Rana J T Al-Baghdadi
- Endocrinology and Animal Biosciences Graduate Program, Rutgers, The State University of New Jersey, New Brunswick, NJ, 0890, USA.,Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Al-Qadisiyah, Al-Qadisiayah, Iraq
| | - Inna A Nikonorova
- Department of Nutritional Sciences and the New Jersey Institute for Food, Nutrition and Health, Rutgers, The State University of New Jersey, New Brunswick, NJ, 08901, USA
| | - Emily T Mirek
- Department of Nutritional Sciences and the New Jersey Institute for Food, Nutrition and Health, Rutgers, The State University of New Jersey, New Brunswick, NJ, 08901, USA
| | - Yongping Wang
- Department of Nutritional Sciences and the New Jersey Institute for Food, Nutrition and Health, Rutgers, The State University of New Jersey, New Brunswick, NJ, 08901, USA
| | - Jinhee Park
- Department of Animal Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, 0890, USA
| | - William J Belden
- Department of Animal Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, 0890, USA
| | - Ronald C Wek
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Tracy G Anthony
- Department of Nutritional Sciences and the New Jersey Institute for Food, Nutrition and Health, Rutgers, The State University of New Jersey, New Brunswick, NJ, 08901, USA.
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21
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Hine C, Mitchell JR. Endpoint or Kinetic Measurement of Hydrogen Sulfide Production Capacity in Tissue Extracts. Bio Protoc 2017; 7:e2382. [PMID: 29071285 DOI: 10.21769/bioprotoc.2382] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Hydrogen sulfide (H2S) gas is produced in cells and tissues via various enzymatic processes. H2S is an important signaling molecule in numerous biological processes, and deficiencies in endogenous H2S production are linked to cardiovascular and other health complications. Quantitation of steady-state H2S levels is challenging due to volatility of the gas and the need for specialized equipment. However, the capacity of an organ or tissue extract to produce H2S under optimized reaction conditions can be measured by a number of current assays that vary in sensitivity, specificity and throughput capacity. We developed a rapid, inexpensive, specific and relatively high-throughput method for quantitative detection of H2S production capacity from biological tissues. H2S released into the head space above a biological sample reacts with lead acetate to form lead sulfide, which is measured on a continuous basis using a plate reader or as an endpoint assay.
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Affiliation(s)
- Christopher Hine
- Department of Cellular and Molecular Medicine, Cleveland Clinic Lerner Research Institute, Cleveland, OH 44195 USA
| | - James R Mitchell
- Department of Genetics and Complex Diseases, Harvard T.H. Chan School of Public Health, Boston, MA 02115 USA
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