1
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Hunt EG, Hurst KE, Riesenberg BP, Kennedy AS, Gandy EJ, Andrews AM, Del Mar Alicea Pauneto C, Ball LE, Wallace ED, Gao P, Meier J, Serody JJ, Coleman MF, Thaxton JE. Acetyl-CoA carboxylase obstructs CD8 + T cell lipid utilization in the tumor microenvironment. Cell Metab 2024; 36:969-983.e10. [PMID: 38490211 DOI: 10.1016/j.cmet.2024.02.009] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 11/10/2023] [Accepted: 02/14/2024] [Indexed: 03/17/2024]
Abstract
The solid tumor microenvironment (TME) imprints a compromised metabolic state in tumor-infiltrating T cells (TILs), hallmarked by the inability to maintain effective energy synthesis for antitumor function and survival. T cells in the TME must catabolize lipids via mitochondrial fatty acid oxidation (FAO) to supply energy in nutrient stress, and it is established that T cells enriched in FAO are adept at cancer control. However, endogenous TILs and unmodified cellular therapy products fail to sustain bioenergetics in tumors. We reveal that the solid TME imposes perpetual acetyl-coenzyme A (CoA) carboxylase (ACC) activity, invoking lipid biogenesis and storage in TILs that opposes FAO. Using metabolic, lipidomic, and confocal imaging strategies, we find that restricting ACC rewires T cell metabolism, enabling energy maintenance in TME stress. Limiting ACC activity potentiates a gene and phenotypic program indicative of T cell longevity, engendering T cells with increased survival and polyfunctionality, which sustains cancer control.
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Affiliation(s)
- Elizabeth G Hunt
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA; Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Katie E Hurst
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Brian P Riesenberg
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Andrew S Kennedy
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA; Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Evelyn J Gandy
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Alex M Andrews
- Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Coral Del Mar Alicea Pauneto
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA; Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Emily D Wallace
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Peng Gao
- Department of Medicine, Metabolomics Core Facility, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Jeremy Meier
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA; Department of Microbiology & Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - John J Serody
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA; Department of Microbiology & Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Michael F Coleman
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Jessica E Thaxton
- Immunotherapy Program, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA; Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA.
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2
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Mulholland PJ, Berto S, Wilmarth PA, McMahan C, Ball LE, Woodward JJ. Adaptor protein complex 2 in the orbitofrontal cortex predicts alcohol use disorder. Mol Psychiatry 2023; 28:4766-4776. [PMID: 37679472 PMCID: PMC10918038 DOI: 10.1038/s41380-023-02236-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/17/2023] [Accepted: 08/23/2023] [Indexed: 09/09/2023]
Abstract
Alcohol use disorder (AUD) is a life-threatening disease characterized by compulsive drinking, cognitive deficits, and social impairment that continue despite negative consequences. The inability of individuals with AUD to regulate drinking may involve functional deficits in cortical areas that normally balance actions that have aspects of both reward and risk. Among these, the orbitofrontal cortex (OFC) is critically involved in goal-directed behavior and is thought to maintain a representation of reward value that guides decision making. In the present study, we analyzed post-mortem OFC brain samples collected from age- and sex-matched control subjects and those with AUD using proteomics, bioinformatics, machine learning, and reverse genetics approaches. Of the 4,500+ total unique proteins identified in the proteomics screen, there were 47 proteins that differed significantly by sex that were enriched in processes regulating extracellular matrix and axonal structure. Gene ontology enrichment analysis revealed that proteins differentially expressed in AUD cases were involved in synaptic and mitochondrial function, as well as transmembrane transporter activity. Alcohol-sensitive OFC proteins also mapped to abnormal social behaviors and social interactions. Machine learning analysis of the post-mortem OFC proteome revealed dysregulation of presynaptic (e.g., AP2A1) and mitochondrial proteins that predicted the occurrence and severity of AUD. Using a reverse genetics approach to validate a target protein, we found that prefrontal Ap2a1 expression significantly correlated with voluntary alcohol drinking in male and female genetically diverse mouse strains. Moreover, recombinant inbred strains that inherited the C57BL/6J allele at the Ap2a1 interval consumed higher amounts of alcohol than those that inherited the DBA/2J allele. Together, these findings highlight the impact of excessive alcohol consumption on the human OFC proteome and identify important cross-species cortical mechanisms and proteins that control drinking in individuals with AUD.
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Affiliation(s)
- Patrick J Mulholland
- Department of Neuroscience, Medical University of South Carolina, Charleston, SC, 29425, USA.
- Charleston Alcohol Research Center, Medical University of South Carolina, Charleston, SC, 29425, USA.
| | - Stefano Berto
- Department of Neuroscience, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Phillip A Wilmarth
- Proteomics Shared Resource, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR, 97239, USA
| | - Christopher McMahan
- School of Mathematical and Statistical Sciences, Clemson-MUSC Artificial Intelligence Hub, Clemson University, Clemson, SC, 29634-0975, USA
| | - Lauren E Ball
- Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - John J Woodward
- Department of Neuroscience, Medical University of South Carolina, Charleston, SC, 29425, USA
- Charleston Alcohol Research Center, Medical University of South Carolina, Charleston, SC, 29425, USA
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3
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Mulholland PJ, Berto S, Wilmarth PA, McMahan C, Ball LE, Woodward JJ. Adaptor protein complex 2 in the orbitofrontal cortex predicts alcohol use disorder. bioRxiv 2023:2023.05.28.542637. [PMID: 37398482 PMCID: PMC10312445 DOI: 10.1101/2023.05.28.542637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Alcohol use disorder (AUD) is a life-threatening disease characterized by compulsive drinking, cognitive deficits, and social impairment that continue despite negative consequences. The inability of individuals with AUD to regulate drinking may involve functional deficits in cortical areas that normally balance actions that have aspects of both reward and risk. Among these, the orbitofrontal cortex (OFC) is critically involved in goal-directed behavior and is thought to maintain a representation of reward value that guides decision making. In the present study, we analyzed post-mortem OFC brain samples collected from age- and sex-matched control subjects and those with AUD using proteomics, bioinformatics, machine learning, and reverse genetics approaches. Of the 4,500+ total unique proteins identified in the proteomics screen, there were 47 proteins that differed significantly by sex that were enriched in processes regulating extracellular matrix and axonal structure. Gene ontology enrichment analysis revealed that proteins differentially expressed in AUD cases were involved in synaptic and mitochondrial function, as well as transmembrane transporter activity. Alcohol-sensitive OFC proteins also mapped to abnormal social behaviors and social interactions. Machine learning analysis of the post-mortem OFC proteome revealed dysregulation of presynaptic (e.g., AP2A1) and mitochondrial proteins that predicted the occurrence and severity of AUD. Using a reverse genetics approach to validate a target protein, we found that prefrontal Ap2a1 expression significantly correlated with voluntary alcohol drinking in male and female genetically diverse mouse strains. Moreover, recombinant inbred strains that inherited the C57BL/6J allele at the Ap2a1 interval consumed higher amounts of alcohol than those that inherited the DBA/2J allele. Together, these findings highlight the impact of excessive alcohol consumption on the human OFC proteome and identify important cross-species cortical mechanisms and proteins that control drinking in individuals with AUD.
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4
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Brobbey C, Yin S, Liu L, Ball LE, Howe PH, Delaney JR, Gan W. Autophagy dictates sensitivity to PRMT5 inhibitor in breast cancer. Sci Rep 2023; 13:10752. [PMID: 37400460 DOI: 10.1038/s41598-023-37706-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 06/26/2023] [Indexed: 07/05/2023] Open
Abstract
Protein arginine methyltransferase 5 (PRMT5) catalyzes mono-methylation and symmetric di-methylation on arginine residues and has emerged as a potential antitumor target with inhibitors being tested in clinical trials. However, it remains unknown how the efficacy of PRMT5 inhibitors is regulated. Here we report that autophagy blockage enhances cellular sensitivity to PRMT5 inhibitor in triple negative breast cancer cells. Genetic ablation or pharmacological inhibition of PRMT5 triggers cytoprotective autophagy. Mechanistically, PRMT5 catalyzes monomethylation of ULK1 at R532 to suppress ULK1 activation, leading to attenuation of autophagy. As a result, ULK1 inhibition blocks PRMT5 deficiency-induced autophagy and sensitizes cells to PRMT5 inhibitor. Our study not only identifies autophagy as an inducible factor that dictates cellular sensitivity to PRMT5 inhibitor, but also unearths a critical molecular mechanism by which PRMT5 regulates autophagy through methylating ULK1, providing a rationale for the combination of PRMT5 and autophagy inhibitors in cancer therapy.
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Affiliation(s)
- Charles Brobbey
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Shasha Yin
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Liu Liu
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, USA
| | - Philip H Howe
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Joe R Delaney
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Wenjian Gan
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, 29425, USA.
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5
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Jensen CC, Clements AN, Liou H, Ball LE, Bethard JR, Langlais PR, Toth RK, Chauhan SS, Casillas AL, Daulat SR, Kraft AS, Cress AE, Miranti CK, Mouneimne G, Rogers GC, Warfel NA. PIM1 phosphorylates ABI2 to enhance actin dynamics and promote tumor invasion. J Cell Biol 2023; 222:e202208136. [PMID: 37042842 PMCID: PMC10103708 DOI: 10.1083/jcb.202208136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 12/21/2022] [Accepted: 03/03/2023] [Indexed: 04/13/2023] Open
Abstract
Distinguishing key factors that drive the switch from indolent to invasive disease will make a significant impact on guiding the treatment of prostate cancer (PCa) patients. Here, we identify a novel signaling pathway linking hypoxia and PIM1 kinase to the actin cytoskeleton and cell motility. An unbiased proteomic screen identified Abl-interactor 2 (ABI2), an integral member of the wave regulatory complex (WRC), as a PIM1 substrate. Phosphorylation of ABI2 at Ser183 by PIM1 increased ABI2 protein levels and enhanced WRC formation, resulting in increased protrusive activity and cell motility. Cell protrusion induced by hypoxia and/or PIM1 was dependent on ABI2. In vivo smooth muscle invasion assays showed that overexpression of PIM1 significantly increased the depth of tumor cell invasion, and treatment with PIM inhibitors significantly reduced intramuscular PCa invasion. This research uncovers a HIF-1-independent signaling axis that is critical for hypoxia-induced invasion and establishes a novel role for PIM1 as a key regulator of the actin cytoskeleton.
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Affiliation(s)
- Corbin C. Jensen
- Cancer Biology Graduate Program, University of Arizona, Tucson, AZ, USA
| | - Amber N. Clements
- Cancer Biology Graduate Program, University of Arizona, Tucson, AZ, USA
| | - Hope Liou
- Cancer Biology Graduate Program, University of Arizona, Tucson, AZ, USA
| | - Lauren E. Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, USA
| | - Jennifer R. Bethard
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, USA
| | | | | | - Shailender S. Chauhan
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, USA
| | | | | | | | - Anne E. Cress
- University of Arizona Cancer Center, Tucson, AZ, USA
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, USA
| | - Cindy K. Miranti
- University of Arizona Cancer Center, Tucson, AZ, USA
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, USA
| | - Ghassan Mouneimne
- University of Arizona Cancer Center, Tucson, AZ, USA
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, USA
| | - Greg C. Rogers
- University of Arizona Cancer Center, Tucson, AZ, USA
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, USA
| | - Noel A. Warfel
- University of Arizona Cancer Center, Tucson, AZ, USA
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, USA
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Yin S, Liu L, Ball LE, Wang Y, Bedford MT, Duncan SA, Wang H, Gan W. CDK5-PRMT1-WDR24 signaling cascade promotes mTORC1 signaling and tumor growth. Cell Rep 2023; 42:112316. [PMID: 36995937 PMCID: PMC10539482 DOI: 10.1016/j.celrep.2023.112316] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [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: 04/15/2022] [Revised: 01/20/2023] [Accepted: 03/13/2023] [Indexed: 03/31/2023] Open
Abstract
The mammalian target of rapamycin complex1 (mTORC1) is a central regulator of metabolism and cell growth by sensing diverse environmental signals, including amino acids. The GATOR2 complex is a key component linking amino acid signals to mTORC1. Here, we identify protein arginine methyltransferase 1 (PRMT1) as a critical regulator of GATOR2. In response to amino acids, cyclin-dependent kinase 5 (CDK5) phosphorylates PRMT1 at S307 to promote PRMT1 translocation from nucleus to cytoplasm and lysosome, which in turn methylates WDR24, an essential component of GATOR2, to activate the mTORC1 pathway. Disruption of the CDK5-PRMT1-WDR24 axis suppresses hepatocellular carcinoma (HCC) cell proliferation and xenograft tumor growth. High PRMT1 protein expression is associated with elevated mTORC1 signaling in patients with HCC. Thus, our study dissects a phosphorylation- and arginine methylation-dependent regulatory mechanism of mTORC1 activation and tumor growth and provides a molecular basis to target this pathway for cancer therapy.
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Affiliation(s)
- Shasha Yin
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Liu Liu
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Yalong Wang
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX 78957, USA
| | - Mark T Bedford
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX 78957, USA
| | - Stephen A Duncan
- Department of Regenerative Medicine & Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Haizhen Wang
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Wenjian Gan
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA.
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7
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Le Minh G, Esquea EM, Dhameliya TT, Merzy J, Lee MH, Ball LE, Reginato MJ. Kruppel-like factor 8 regulates triple negative breast cancer stem cell-like activity. Front Oncol 2023; 13:1141834. [PMID: 37152043 PMCID: PMC10155275 DOI: 10.3389/fonc.2023.1141834] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/29/2023] [Indexed: 05/09/2023] Open
Abstract
Introduction Breast tumor development is regulated by a sub-population of breast cancer cells, termed cancer stem-like cells (CSC), which are capable of self-renewing and differentiating, and are involved in promoting breast cancer invasion, metastasis, drug resistance and relapse. CSCs are highly adaptable, capable of reprogramming their own metabolism and signaling activity in response to stimuli within the tumor microenvironment. Recently, the nutrient sensor O-GlcNAc transferase (OGT) and O-GlcNAcylation was shown to be enriched in CSC populations, where it promotes the stemness and tumorigenesis of breast cancer cells in vitro and in vivo. This enrichment was associated with upregulation of the transcription factor Kruppel-like-factor 8 (KLF8) suggesting a potential role of KLF8 in regulating CSCs properties. Methods Triple-negative breast cancer cells were genetically modified to generate KLF8 overexpressing or KLF8 knock-down cells. Cancer cells, control or with altered KLF8 expression were analyzed to assess mammosphere formation efficiency, CSCs frequency and expression of CSCs factors. Tumor growth in vivo of control or KLF8 knock-down cells was assessed by fat-pad injection of these cell in immunocompromised mice. Results Here, we show that KLF8 is required and sufficient for regulating CSC phenotypes and regulating transcription factors SOX2, NANOG, OCT4 and c-MYC. KLF8 levels are associated with chemoresistance in triple negative breast cancer patients and overexpression in breast cancer cells increased paclitaxel resistance. KLF8 and OGT co-regulate each other to form a feed-forward loop to promote CSCs phenotype and mammosphere formation of breast cancer cells. Discussion These results suggest a critical role of KLF8 and OGT in promoting CSCs and cancer progression, that may serve as potential targets for developing strategy to target CSCs specifically.
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Affiliation(s)
- Giang Le Minh
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Emily M. Esquea
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Tejsi T. Dhameliya
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Jessica Merzy
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Mi-Hye Lee
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, United States
| | - Lauren E. Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, United States
| | - Mauricio J. Reginato
- Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, PA, United States
- Translational and Cellular Oncology Program, Sidney Kimmel Cancer Center of Thomas Jefferson University, Philadelphia, PA, United States
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8
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Zhang Z, Huang Z, Awad M, Elsalanty M, Cray J, Ball LE, Maynard JC, Burlingame AL, Zeng H, Mansky KC, Ruan HB. O-GlcNAc glycosylation orchestrates fate decision and niche function of bone marrow stromal progenitors. eLife 2023; 12:e85464. [PMID: 36861967 PMCID: PMC10032655 DOI: 10.7554/elife.85464] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 12/08/2022] [Accepted: 03/01/2023] [Indexed: 03/03/2023] Open
Abstract
In mammals, interactions between the bone marrow (BM) stroma and hematopoietic progenitors contribute to bone-BM homeostasis. Perinatal bone growth and ossification provide a microenvironment for the transition to definitive hematopoiesis; however, mechanisms and interactions orchestrating the development of skeletal and hematopoietic systems remain largely unknown. Here, we establish intracellular O-linked β-N-acetylglucosamine (O-GlcNAc) modification as a posttranslational switch that dictates the differentiation fate and niche function of early BM stromal cells (BMSCs). By modifying and activating RUNX2, O-GlcNAcylation promotes osteogenic differentiation of BMSCs and stromal IL-7 expression to support lymphopoiesis. In contrast, C/EBPβ-dependent marrow adipogenesis and expression of myelopoietic stem cell factor (SCF) is inhibited by O-GlcNAcylation. Ablating O-GlcNAc transferase (OGT) in BMSCs leads to impaired bone formation, increased marrow adiposity, as well as defective B-cell lymphopoiesis and myeloid overproduction in mice. Thus, the balance of osteogenic and adipogenic differentiation of BMSCs is determined by reciprocal O-GlcNAc regulation of transcription factors, which simultaneously shapes the hematopoietic niche.
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Affiliation(s)
- Zengdi Zhang
- Department of Integrative Biology and Physiology, University of Minnesota Medical SchoolMinneapolisUnited States
| | - Zan Huang
- Department of Integrative Biology and Physiology, University of Minnesota Medical SchoolMinneapolisUnited States
- Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural UniversityNanjingChina
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural UniversityNanjingChina
| | - Mohamed Awad
- Department of Medical Anatomical Sciences, College of Osteopathic Medicine of the Pacific, Western University of Health SciencesPomonaUnited States
| | - Mohammed Elsalanty
- Department of Medical Anatomical Sciences, College of Osteopathic Medicine of the Pacific, Western University of Health SciencesPomonaUnited States
| | - James Cray
- Department of Biomedical Education and Anatomy, The Ohio State University College of Medicine, and Division of Biosciences, The Ohio State University College of DentistryColumbusUnited States
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South CarolinaCharlestonUnited States
| | - Jason C Maynard
- Department of Pharmaceutical Chemistry, University of California, San FranciscoSan FranciscoUnited States
| | - Alma L Burlingame
- Department of Pharmaceutical Chemistry, University of California, San FranciscoSan FranciscoUnited States
| | - Hu Zeng
- Division of Rheumatology, Department of Internal Medicine, Mayo ClinicRochesterUnited States
- Department of Immunology, Mayo ClinicRochesterUnited States
| | - Kim C Mansky
- Department of Developmental and Surgical Sciences, School of Dentistry, University of MinnesotaMinneapolisUnited States
| | - Hai-Bin Ruan
- Department of Integrative Biology and Physiology, University of Minnesota Medical SchoolMinneapolisUnited States
- Center for Immunology, University of Minnesota Medical SchoolMinneapolisUnited States
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Liu L, Lin B, Yin S, Ball LE, Delaney JR, Long DT, Gan W. Arginine methylation of BRD4 by PRMT2/4 governs transcription and DNA repair. Sci Adv 2022; 8:eadd8928. [PMID: 36475791 PMCID: PMC9728970 DOI: 10.1126/sciadv.add8928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 11/02/2022] [Indexed: 06/17/2023]
Abstract
BRD4 functions as an epigenetic reader and plays a crucial role in regulating transcription and genome stability. Dysregulation of BRD4 is frequently observed in various human cancers. However, the molecular details of BRD4 regulation remain largely unknown. Here, we report that PRMT2- and PRMT4-mediated arginine methylation is pivotal for BRD4 functions on transcription, DNA repair, and tumor growth. Specifically, PRMT2/4 interacts with and methylates BRD4 at R179, R181, and R183. This arginine methylation selectively controls a transcriptional program by promoting BRD4 recruitment to acetylated histones/chromatin. Moreover, BRD4 arginine methylation is induced by DNA damage and thereby promotes its binding to chromatin for DNA repair. Deficiency in BRD4 arginine methylation significantly suppresses tumor growth and sensitizes cells to BET inhibitors and DNA damaging agents. Therefore, our findings reveal an arginine methylation-dependent regulatory mechanism of BRD4 and highlight targeting PRMT2/4 for better antitumor effect of BET inhibitors and DNA damaging agents.
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Affiliation(s)
- Liu Liu
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Baicheng Lin
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Shasha Yin
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Lauren E. Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Joe R. Delaney
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - David T. Long
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Wenjian Gan
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
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10
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Ball LE, Pfukwa R, Siqueira RP, Mosqueira VCF, Klumperman B. PLA‐
b
‐SMA as an Amphiphilic Diblock Copolymer for Encapsulation of Lipophilic Cargo. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lauren E. Ball
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1 Matieland 7602 South Africa
| | - Rueben Pfukwa
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1 Matieland 7602 South Africa
| | - Raoni P. Siqueira
- School of Pharmacy Federal University of Ouro Preto Ouro Preto Minas Gerais 35400‐000 Brazil
| | - Vanessa C. F. Mosqueira
- School of Pharmacy Federal University of Ouro Preto Ouro Preto Minas Gerais 35400‐000 Brazil
| | - Bert Klumperman
- Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1 Matieland 7602 South Africa
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11
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Gerassimovich YA, Miladinovski-Bangall SJ, Bridges KM, Boateng L, Ball LE, Valafar H, Nag A. Proximity-dependent biotinylation detects associations between SARS coronavirus nonstructural protein 1 and stress granule-associated proteins. J Biol Chem 2021; 297:101399. [PMID: 34774526 PMCID: PMC8580555 DOI: 10.1016/j.jbc.2021.101399] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 10/28/2021] [Accepted: 11/08/2021] [Indexed: 11/17/2022] Open
Abstract
The nonstructural protein 1 (nsp1) of severe acute respiratory syndrome coronavirus and severe acute respiratory syndrome coronavirus 2 is a critical viral protein that suppresses host gene expression by blocking the assembly of the ribosome on host mRNAs. To understand the mechanism of inhibition of host gene expression, we sought to identify cellular proteins that interact with nsp1. Using proximity-dependent biotinylation followed by proteomic analyses of biotinylated proteins, here we captured multiple dynamic interactions of nsp1 with host cell proteins. In addition to ribosomal proteins, we identified several pre-mRNA processing proteins that interact with nsp1, including splicing factors and transcription termination proteins, as well as exosome, and stress granule (SG)-associated proteins. We found that the interactions with transcription termination factors are primarily governed by the C-terminal region of nsp1 and are disrupted by the mutation of amino acids K164 and H165 that are essential for its host shutoff function. We further show that nsp1 interacts with Ras GTPase-activating protein SH3 domain-binding protein 1 (G3BP1) and colocalizes with G3BP1 in SGs under sodium arsenite-induced stress. Finally, we observe that the presence of nsp1 disrupts the maturation of SGs over a long period. Isolation of SG core at different times shows a gradual loss of G3BP1 in the presence of nsp1.
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Affiliation(s)
- Yevgeniy A Gerassimovich
- Natural Sciences and Engineering, University of South Carolina Upstate, Spartanburg, South Carolina, USA
| | | | - Kaitlin M Bridges
- Natural Sciences and Engineering, University of South Carolina Upstate, Spartanburg, South Carolina, USA
| | - Linkel Boateng
- Department of Computer Science and Engineering, University of South Carolina, Columbia, South Carolina, USA
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Homayoun Valafar
- Department of Computer Science and Engineering, University of South Carolina, Columbia, South Carolina, USA
| | - Anita Nag
- Natural Sciences and Engineering, University of South Carolina Upstate, Spartanburg, South Carolina, USA.
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12
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Ball LE, Agana B, Comte-Walters S, Rockey DC, Masur H, Kottilil S, Meissner EG. Hepatitis C virus treatment with direct-acting antivirals induces rapid changes in the hepatic proteome. J Viral Hepat 2021; 28:1614-1623. [PMID: 34379872 PMCID: PMC8530867 DOI: 10.1111/jvh.13593] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 12/20/2022]
Abstract
Treatment of chronic hepatitis C virus with direct-acting antivirals usually eradicates infection, but liver fibrosis does not resolve concurrently. In patients who develop cirrhosis prior to hepatitis C virus treatment, hepatic decompensation and hepatocellular carcinoma can still occur after viral elimination due to residual fibrosis. We hypothesized the liver proteome would exhibit meaningful changes in inflammatory and fibrinogenic pathways change upon hepatitis C virus eradication, which could impact subsequent fibrosis regression. We analysed the liver proteome and phosphoproteome of paired liver biopsies obtained from 8 hepatitis C virus-infected patients before or immediately after treatment with direct-acting antivirals. Proteins in interferon signalling and antiviral pathways decreased concurrent with hepatitis C virus treatment, consistent with prior transcriptomic analyses. Expression of extracellular matrix proteins associated with liver fibrosis did not change with treatment, but the phosphorylation pattern of proteins present within signalling pathways implicated in hepatic fibrinogenesis, including the ERK1/2 pathway, was altered concurrent with hepatitis C virus treatment. Hepatitis C virus treatment leads to reduced expression of hepatic proteins involved in interferon and antiviral signalling. Additionally, changes in fibrosis signalling pathways are detectable before alteration in extracellular matrix proteins, identifying a putative chronology for the dynamic processes involved in fibrosis reversal.
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Affiliation(s)
- Lauren E. Ball
- Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston, SC, USA
| | - Bernice Agana
- Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston, SC, USA
| | - Susana Comte-Walters
- Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston, SC, USA
| | - Don C. Rockey
- Digestive Disease Research Center, Medical University of South Carolina, Charleston, SC, USA
| | - Henry Masur
- Critical Care Medicine Department, NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Shyam Kottilil
- Division of Clinical Care and Research, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Eric G. Meissner
- Division of Infectious Diseases, Medical University of South Carolina, Charleston, SC, USA,Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
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13
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Barnes KA, Szewczyk Z, Kelly JT, Campbell KL, Ball LE. How cost-effective is nutrition care delivered in primary healthcare settings? A systematic review of trial-based economic evaluations. Nutr Rev 2021; 80:1480-1496. [PMID: 34605888 DOI: 10.1093/nutrit/nuab082] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
CONTEXT Nutrition care is an effective lifestyle intervention for the treatment and prevention of many noncommunicable diseases. Primary care is a high-value setting in which to provide nutrition care. OBJECTIVE The objective of this review was to evaluate the cost-effectiveness of nutrition care interventions provided in primary care settings. DATA SOURCES Medline, Embase, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), the Cochrane Central Register of Controlled Trials, EconLit, and the National Health Service Economic Evaluation Database (NHS EED) were searched from inception to May 2021. DATA EXTRACTION Data extraction was guided by the Consolidated Health Economic Evaluation Reporting Standards (CHEERS) reporting guidelines. Randomized trials of nutrition interventions in primary care settings were included in the analysis if incremental cost-effectiveness ratios were reported. The main outcome variable incremental cost-effectiveness ratios (ICERs) and reported interpretations were used to categorize interventions by the cost-effectiveness plane quadrant. RESULTS Of 6837 articles identified, 10 were included (representing 9 studies). Eight of the 9 included studies found nutrition care in primary care settings to be more costly and more effective than usual care . High study heterogeneity limited further conclusions. CONCLUSION Nutrition care in primary care settings is effective, though it requires investment; it should, therefore, be considered in primary care planning. Further studies are needed to evaluate the long-term cost-effectiveness of providing nutrition care in primary care settings. SYSTEMATIC REVIEW REGISTRATION PROSPERO registration no. CRD42020201146.
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Affiliation(s)
- Katelyn A Barnes
- Healthy Primary Care, Menzies Health Institute Queensland, Griffith University, Nathan, QLD, Australia
| | - Zoe Szewczyk
- Hunter Medical Research Institute (HMRI), New Lambton Heights, NSW, Australia.,School of Medicine and Public Health, the University of Newcastle, Callaghan, NSW, Australia
| | - Jaimon T Kelly
- Centre for Applied Health Economics, Menzies Health Institute Queensland, Griffith University, Nathan, QLD, Australia.,Centre for Online Health, the University of Queensland, Brisbane, QLD, Australia.,Centre for Health Services Research, the University of Queensland, Brisbane, QLD, Australia
| | - Katrina L Campbell
- Centre for Applied Health Economics, Menzies Health Institute Queensland, Griffith University, Nathan, QLD, Australia.,Healthcare Excellence and Innovation, Metro North Hospital and Health Service, Brisbane, Australia
| | - Lauren E Ball
- Healthy Primary Care, Menzies Health Institute Queensland, Griffith University, Nathan, QLD, Australia
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14
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Rujchanarong D, Lefler J, Saunders JE, Pippin S, Spruill L, Bethard JR, Ball LE, Mehta AS, Drake RR, Ostrowski MC, Angel PM. Defining the Tumor Microenvironment by Integration of Immunohistochemistry and Extracellular Matrix Targeted Imaging Mass Spectrometry. Cancers (Basel) 2021; 13:4419. [PMID: 34503228 PMCID: PMC8430776 DOI: 10.3390/cancers13174419] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 07/01/2021] [Revised: 08/25/2021] [Accepted: 08/28/2021] [Indexed: 12/11/2022] Open
Abstract
Breast stroma plays a significant role in breast cancer risk and progression yet remains poorly understood. In breast stroma, collagen is the most abundantly expressed protein and its increased deposition and alignment contributes to progression and poor prognosis. Collagen post-translation modifications such as hydroxylated-proline (HYP) control deposition and stromal organization. The clinical relevance of collagen HYP site modifications in cancer processes remains undefined due to technical issues accessing collagen from formalin-fixed, paraffin-embedded (FFPE) tissues. We previously developed a targeted approach for investigating collagen and other extracellular matrix proteins from FFPE tissue. Here, we hypothesized that immunohistochemistry staining for fibroblastic markers would not interfere with targeted detection of collagen stroma peptides and could reveal peptide regulation influenced by specific cell types. Our initial work demonstrated that stromal peptide peak intensities when using MALD-IMS following IHC staining (αSMA, FAP, P4HA3 and PTEN) were comparable to serial sections of nonstained tissue. Analysis of histology-directed IMS using PTEN on breast tissues and TMAs revealed heterogeneous PTEN staining patterns and suggestive roles in stromal protein regulation. This study sets the foundation for investigations of target cell types and their unique contribution to collagen regulation within extracellular matrix niches.
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Affiliation(s)
- Denys Rujchanarong
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston, SC 29425, USA; (D.R.); (J.E.S.); (S.P.); (J.R.B.); (L.E.B.); (A.S.M.); (R.R.D.)
| | - Julia Lefler
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA; (J.L.); (M.C.O.)
| | - Janet E. Saunders
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston, SC 29425, USA; (D.R.); (J.E.S.); (S.P.); (J.R.B.); (L.E.B.); (A.S.M.); (R.R.D.)
| | - Sarah Pippin
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston, SC 29425, USA; (D.R.); (J.E.S.); (S.P.); (J.R.B.); (L.E.B.); (A.S.M.); (R.R.D.)
| | - Laura Spruill
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC 29425, USA;
| | - Jennifer R. Bethard
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston, SC 29425, USA; (D.R.); (J.E.S.); (S.P.); (J.R.B.); (L.E.B.); (A.S.M.); (R.R.D.)
| | - Lauren E. Ball
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston, SC 29425, USA; (D.R.); (J.E.S.); (S.P.); (J.R.B.); (L.E.B.); (A.S.M.); (R.R.D.)
| | - Anand S. Mehta
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston, SC 29425, USA; (D.R.); (J.E.S.); (S.P.); (J.R.B.); (L.E.B.); (A.S.M.); (R.R.D.)
| | - Richard R. Drake
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston, SC 29425, USA; (D.R.); (J.E.S.); (S.P.); (J.R.B.); (L.E.B.); (A.S.M.); (R.R.D.)
| | - Michael C. Ostrowski
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA; (J.L.); (M.C.O.)
| | - Peggi M. Angel
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Bruker-MUSC Center of Excellence, Clinical Glycomics, Medical University of South Carolina, Charleston, SC 29425, USA; (D.R.); (J.E.S.); (S.P.); (J.R.B.); (L.E.B.); (A.S.M.); (R.R.D.)
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA; (J.L.); (M.C.O.)
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15
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Schuck PL, Ball LE, Stewart JA. The DNA-binding protein CST associates with the cohesin complex and promotes chromosome cohesion. J Biol Chem 2021; 297:101026. [PMID: 34339741 PMCID: PMC8390553 DOI: 10.1016/j.jbc.2021.101026] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 07/22/2021] [Accepted: 07/29/2021] [Indexed: 01/26/2023] Open
Abstract
Sister chromatid cohesion (SCC), the pairing of sister chromatids after DNA replication until mitosis, is established by loading of the cohesin complex on newly replicated chromatids. Cohesin must then be maintained until mitosis to prevent segregation defects and aneuploidy. However, how SCC is established and maintained until mitosis remains incompletely understood, and emerging evidence suggests that replication stress may lead to premature SCC loss. Here, we report that the ssDNA-binding protein CTC1-STN1-TEN1 (CST) aids in SCC. CST primarily functions in telomere length regulation but also has known roles in replication restart and DNA repair. After depletion of CST subunits, we observed an increase in the complete loss of SCC. In addition, we determined that CST associates with the cohesin complex. Unexpectedly, we did not find evidence of altered cohesin loading or mitotic progression in the absence of CST; however, we did find that treatment with various replication inhibitors increased the association between CST and cohesin. Because replication stress was recently shown to induce SCC loss, we hypothesized that CST may be required to maintain or remodel SCC after DNA replication fork stalling. In agreement with this idea, SCC loss was greatly increased in CST-depleted cells after exogenous replication stress. Based on our findings, we propose that CST aids in the maintenance of SCC at stalled replication forks to prevent premature cohesion loss.
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Affiliation(s)
- P Logan Schuck
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina, USA
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Jason A Stewart
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina, USA.
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16
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Yin S, Liu L, Brobbey C, Palanisamy V, Ball LE, Olsen SK, Ostrowski MC, Gan W. PRMT5-mediated arginine methylation activates AKT kinase to govern tumorigenesis. Nat Commun 2021; 12:3444. [PMID: 34103528 PMCID: PMC8187744 DOI: 10.1038/s41467-021-23833-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 05/19/2021] [Indexed: 02/05/2023] Open
Abstract
AKT is involved in a number of key cellular processes including cell proliferation, apoptosis and metabolism. Hyperactivation of AKT is associated with many pathological conditions, particularly cancers. Emerging evidence indicates that arginine methylation is involved in modulating AKT signaling pathway. However, whether and how arginine methylation directly regulates AKT kinase activity remain unknown. Here we report that protein arginine methyltransferase 5 (PRMT5), but not other PRMTs, promotes AKT activation by catalyzing symmetric dimethylation of AKT1 at arginine 391 (R391). Mechanistically, AKT1-R391 methylation cooperates with phosphatidylinositol 3,4,5 trisphosphate (PIP3) to relieve the pleckstrin homology (PH)-in conformation, leading to AKT1 membrane translocation and subsequent activation by phosphoinositide-dependent kinase-1 (PDK1) and the mechanistic target of rapamycin complex 2 (mTORC2). As a result, deficiency in AKT1-R391 methylation significantly suppresses AKT1 kinase activity and tumorigenesis. Lastly, we show that PRMT5 inhibitor synergizes with AKT inhibitor or chemotherapeutic drugs to enhance cell death. Altogether, our study suggests that R391 methylation is an important step for AKT activation and its oncogenic function.
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Affiliation(s)
- Shasha Yin
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
| | - Liu Liu
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
| | - Charles Brobbey
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
| | - Viswanathan Palanisamy
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology, and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, USA
| | - Shaun K Olsen
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Michael C Ostrowski
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
| | - Wenjian Gan
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA.
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17
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Clift CL, Su YR, Bichell D, Jensen Smith HC, Bethard JR, Norris-Caneda K, Comte-Walters S, Ball LE, Hollingsworth MA, Mehta AS, Drake RR, Angel PM. Collagen fiber regulation in human pediatric aortic valve development and disease. Sci Rep 2021; 11:9751. [PMID: 33963260 PMCID: PMC8105334 DOI: 10.1038/s41598-021-89164-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 04/19/2021] [Indexed: 02/03/2023] Open
Abstract
Congenital aortic valve stenosis (CAVS) affects up to 10% of the world population without medical therapies to treat the disease. New molecular targets are continually being sought that can halt CAVS progression. Collagen deregulation is a hallmark of CAVS yet remains mostly undefined. Here, histological studies were paired with high resolution accurate mass (HRAM) collagen-targeting proteomics to investigate collagen fiber production with collagen regulation associated with human AV development and pediatric end-stage CAVS (pCAVS). Histological studies identified collagen fiber realignment and unique regions of high-density collagen in pCAVS. Proteomic analysis reported specific collagen peptides are modified by hydroxylated prolines (HYP), a post-translational modification critical to stabilizing the collagen triple helix. Quantitative data analysis reported significant regulation of collagen HYP sites across patient categories. Non-collagen type ECM proteins identified (26 of the 44 total proteins) have direct interactions in collagen synthesis, regulation, or modification. Network analysis identified BAMBI (BMP and Activin Membrane Bound Inhibitor) as a potential upstream regulator of the collagen interactome. This is the first study to detail the collagen types and HYP modifications associated with human AV development and pCAVS. We anticipate that this study will inform new therapeutic avenues that inhibit valvular degradation in pCAVS and engineered options for valve replacement.
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Affiliation(s)
- Cassandra L Clift
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Bruker-MUSC Clinical Glycomics Center of Excellence, Medical University of South Carolina, 173 Ashley Ave, BSB358, Charleston, SC, 29425, USA
| | - Yan Ru Su
- Division of Pediatric Cardiac Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - David Bichell
- Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Heather C Jensen Smith
- Eppley Institute for Cancer Research and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA
| | | | | | | | | | - M A Hollingsworth
- Eppley Institute for Cancer Research and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA
| | - Anand S Mehta
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Bruker-MUSC Clinical Glycomics Center of Excellence, Medical University of South Carolina, 173 Ashley Ave, BSB358, Charleston, SC, 29425, USA
| | - Richard R Drake
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Bruker-MUSC Clinical Glycomics Center of Excellence, Medical University of South Carolina, 173 Ashley Ave, BSB358, Charleston, SC, 29425, USA
| | - Peggi M Angel
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Bruker-MUSC Clinical Glycomics Center of Excellence, Medical University of South Carolina, 173 Ashley Ave, BSB358, Charleston, SC, 29425, USA.
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18
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Ball LE, Riley LJ, Hadasha W, Pfukwa R, Smith CJI, Dafforn TR, Klumperman B. Influence of DIBMA Polymer Length on Lipid Nanodisc Formation and Membrane Protein Extraction. Biomacromolecules 2020; 22:763-772. [PMID: 33373193 DOI: 10.1021/acs.biomac.0c01538] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Polymer-based lipid nanoparticles like styrene-maleic acid lipid particles have revolutionized the study of membrane proteins. More recently, alternative polymers such as poly(diisobutylene-alt-maleic acid) (DIBMA) have been used in this field. DIBMA is commonly synthesized via conventional radical copolymerization. In order to study the influence of its chain length on lipid nanodisc formation and membrane protein extraction, we synthesized DIBMA with molar masses varying from 1.2-12 kDa via RAFT-mediated polymerization. For molar masses in the range of 3-7 kDa, the rate of lipid nanodisc formation was the highest and similar to those of poly(styrene-co-maleic acid) (SMA) and commercially available DIBMA. ZipA solubilization efficiency was significantly higher than for commercially available DIBMA and similar to SMA (circa 75%). Furthermore, RAFT-made DIBMA with a molar mass of 1.2-3.9 kDa showed a much cleaner separation on SDS-PAGE, without the smearing that is typically seen for SMA and commercially available DIBMA.
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Affiliation(s)
- Lauren E Ball
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa
| | - Liam J Riley
- School of Life Sciences, The University of Warwick, Gibbet Hill Campus, Coventry CV4 7AL, United Kingdom.,School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Waled Hadasha
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa
| | - Rueben Pfukwa
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa
| | - Corinne J I Smith
- School of Life Sciences, The University of Warwick, Gibbet Hill Campus, Coventry CV4 7AL, United Kingdom
| | - Timothy R Dafforn
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Bert Klumperman
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa
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19
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Soler ZM, Schlosser RJ, Mulligan JK, Smith TL, Mace JC, Ramakrishan VR, Norris-Caneda K, Bethard JR, Ball LE. Olfactory cleft mucus proteome in chronic rhinosinusitis: a case-control pilot study. Int Forum Allergy Rhinol 2020; 11:1162-1176. [PMID: 33275311 DOI: 10.1002/alr.22743] [Citation(s) in RCA: 5] [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: 09/25/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND Mechanisms of smell loss in chronic rhinosinusitis (CRS) are still unclear and likely multifactorial. Little attention has been given to olfactory cleft (OC) mucus proteins involved in odorant binding and metabolizing enzymes and their potential role in smell loss. METHODS Mucus from the OC was sampled from patients with CRS (n = 20) and controls (n = 10). Liquid chromatography and mass spectrometry were performed, followed by data processing so that protein groups could be identified, quantified, and compared. Hierarchical clustering and bioinformatic analysis were performed on significantly different proteins to explore for enrichment in known biologic pathways. RESULTS A total of 2514 proteins were found in OC mucus from all 30 subjects. Significant differences in protein abundance were found between CRS and controls, including both CRSsNP (n = 351 proteins; log2 fold change range: -3.88 to 6.71) and CRSwNP (n = 298 proteins; log2 fold change range: -4.00 to -6.13). Significant differences were found between patients with normosmia and those with dysosmia (n = 183; log2 fold change range: -3.62 to -2.16) and across groups of interest for a number of odorant binding proteins and metabolizing enzymes. CONCLUSION OC mucous in CRS displays a rich and abundant array of proteins, many of which have been implicated in odorant transport and metabolization in animal studies. Significant differences in the olfactory mucus proteome were seen between CRS subtypes and controls, as well as between those with normal and abnormal olfaction. Further study should confirm these findings and explore the role individual proteins play in odorant transport and metabolization. ©2020 ARSAAOA, LLC.
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Affiliation(s)
- Zachary M Soler
- Division of Rhinology and Sinus Surgery, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Rodney J Schlosser
- Division of Rhinology and Sinus Surgery, Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC.,Department of Surgery, Ralph H. Johnson VA Medical Center, Charleston, SC
| | - Jennifer K Mulligan
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Timothy L Smith
- Division of Rhinology and Sinus/Skull Base Surgery, Department of Otolaryngology-Head and Neck Surgery, Oregon Health & Science University, Portland, OR
| | - Jess C Mace
- Division of Rhinology and Sinus/Skull Base Surgery, Department of Otolaryngology-Head and Neck Surgery, Oregon Health & Science University, Portland, OR
| | - Vijay R Ramakrishan
- Department of Otolaryngology, Head and Neck Surgery, University of Colorado-Anschutz Medical Campus, Aurora, CO
| | - Kim Norris-Caneda
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC
| | - Jennifer R Bethard
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC
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20
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Zhang J, Ye ZW, Chen W, Culpepper J, Jiang H, Ball LE, Mehrotra S, Blumental-Perry A, Tew KD, Townsend DM. Altered redox regulation and S-glutathionylation of BiP contribute to bortezomib resistance in multiple myeloma. Free Radic Biol Med 2020; 160:755-767. [PMID: 32937189 PMCID: PMC7704679 DOI: 10.1016/j.freeradbiomed.2020.09.013] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 09/10/2020] [Indexed: 12/13/2022]
Abstract
Multiple myeloma (MM) cells have high rates of secretion of proteins rich in disulfide bonds and depend upon compartmentalized redox balance for accurate protein folding. The proteasome inhibitor bortezomib (Btz) is a successful frontline treatment for the disease, but its long-term efficacy is restricted by the acquisition of resistance. We found that MM cell lines resistant to Btz maintain high levels of oxidative stress and are cross resistant to endoplasmic reticulum (ER) stress-inducing agents thapsigargin (ThG), and tunicamycin (TuM). Moreover, cells expressing high/wild type levels of glutathione S-transferase P (GSTP) are more resistant than Gstp1/p2 knockout cells. In agreement, basal levels of S-glutathionylated proteins and redox regulation enzymes, including GSTP are elevated at mRNA and protein levels in resistant cells. GSTP mediated S-glutathionylation (SSG) regulates the activities of a number of redox active ER proteins. Here we demonstrated that the post-translational modification determines the balance between foldase and ATPase activities of the binding immunoglobulin protein (BiP), with Cys41-SSG important for ATPase, and Cys420-SSG for foldase. BiP expression and S-glutathionylation are increased in clinical specimens of bone marrow from MM patients compared to non-cancerous samples. Preventing S-glutathionylation in MM cells with a GSTP specific inhibitor restored BiP activities and reversed resistance to Btz. Therefore, S-glutathionylation of BiP confers pro-survival advantages and represents a novel mechanism of drug resistance in MM cells. We conclude that altered GSTP expression leads to S-glutathionylation of BiP, and contributes to acquired resistance to Btz in MM.
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Affiliation(s)
- Jie Zhang
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue, MSC 509/BSB 358, Charleston, SC, 29425, USA.
| | - Zhi-Wei Ye
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue, MSC 509/BSB 358, Charleston, SC, 29425, USA
| | - Wei Chen
- Clinical Research Center, the Second Hospital of Nanjing, Nanjing University of Chinese Medicine, 1-1 Zhongfu Road, Nangjing, 21003, China
| | - John Culpepper
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue, MSC 509/BSB 358, Charleston, SC, 29425, USA
| | - Haiming Jiang
- Intensive Care Unit, Yantai Affiliated Hospital of Binzhou Medical University, No. 717, Jinbu Road, Muping District, Yantai City, Shandong, 264100, PR China
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue, MSC 509/BSB 358, Charleston, SC, 29425, USA
| | - Shikhar Mehrotra
- Department of Surgery, Medical University of South Carolina, 86 Jonathan Lucas Street, HCC512H, Charleston, SC, 29425, USA
| | - Anna Blumental-Perry
- Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, NY, 14203, USA
| | - Kenneth D Tew
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue, MSC 509/BSB 358, Charleston, SC, 29425, USA
| | - Danyelle M Townsend
- Department of Pharmaceutical and Biomedical Sciences, Medical University of South Carolina, 274 Calhoun Street, MSC 141, Charleston, SC, 29425, USA.
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21
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Angel PM, Spruill L, Jefferson M, Bethard JR, Ball LE, Hughes-Halbert C, Drake RR. Zonal regulation of collagen-type proteins and posttranslational modifications in prostatic benign and cancer tissues by imaging mass spectrometry. Prostate 2020; 80:1071-1086. [PMID: 32687633 PMCID: PMC7857723 DOI: 10.1002/pros.24031] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/01/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND The emergence of reactive stroma is a hallmark of prostate cancer (PCa) progression and a potential source for prognostic and diagnostic markers of PCa. Collagen is a main component of reactive stroma and changes systematically and quantitatively to reflect the course of PCa, yet has remained undefined due to a lack of tools that can define collagen protein structure. Here we use a novel collagen-targeting proteomics approach to investigate zonal regulation of collagen-type proteins in PCa prostatectomies. METHODS Prostatectomies from nine patients were divided into zones containing 0%, 5%, 20%, 70% to 80% glandular tissue and 0%, 5%, 25%, 70% by mass of PCa tumor following the McNeal model. Tissue sections from zones were graded by a pathologist for Gleason score, percent tumor present, percent prostatic intraepithelial neoplasia and/or inflammation (INF). High-resolution accurate mass collagen targeting proteomics was done on a select subset of tissue sections from patient-matched tumor or nontumor zones. Imaging mass spectrometry was used to investigate collagen-type regulation corresponding to pathologist-defined regions. RESULTS Complex collagen proteomes were detected from all zones. COL17A and COL27A increased in zones of INF compared with zones with tumor present. COL3A1, COL4A5, and COL8A2 consistently increased in zones with tumor content, independent of tumor size. Collagen hydroxylation of proline (HYP) was altered in tumor zones compared with zones with INF and no tumor. COL3A1 and COL5A1 showed significant changes in HYP peptide ratios within tumor compared with zones of INF (2.59 ± 0.29, P value: .015; 3.75 ± 0.96 P value .036, respectively). By imaging mass spectrometry COL3A1 showed defined localization and regulation to tumor pathology. COL1A1 and COL1A2 showed gradient regulation corresponding to PCa pathology across zones. Pathologist-defined tumor regions showed significant increases in COL1A1 HYP modifications compared with COL1A2 HYP modifications. Certain COL1A1 and COL1A2 peptides could discriminate between pathologist-defined tumor and inflammatory regions. CONCLUSIONS Site-specific posttranslational regulation of collagen structure by proline hydroxylation may be involved in reactive stroma associated with PCa progression. Translational and posttranslational regulation of collagen protein structure has potential for new markers to understand PCa progression and outcomes.
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Affiliation(s)
- Peggi M. Angel
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Proteomics Center, Medical University of South Carolina, Charleston, SC
| | - Laura Spruill
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC
| | - Melanie Jefferson
- Department of Psychiatry & Behavioral Sciences, Medical University of South Carolina, Charleston, SC
| | - Jennifer R. Bethard
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Proteomics Center, Medical University of South Carolina, Charleston, SC
| | - Lauren E. Ball
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Proteomics Center, Medical University of South Carolina, Charleston, SC
| | - Chanita Hughes-Halbert
- Department of Psychiatry & Behavioral Sciences, Medical University of South Carolina, Charleston, SC
| | - Richard R. Drake
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Proteomics Center, Medical University of South Carolina, Charleston, SC
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22
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Zhang L, Townsend DM, Morris M, Maldonado EN, Jiang YL, Broome AM, Bethard JR, Ball LE, Tew KD. Voltage-Dependent Anion Channels Influence Cytotoxicity of ME-344, a Therapeutic Isoflavone. J Pharmacol Exp Ther 2020; 374:308-318. [PMID: 32546528 PMCID: PMC7372917 DOI: 10.1124/jpet.120.000009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 05/19/2020] [Indexed: 01/27/2023] Open
Abstract
ME-344 is a second-generation cytotoxic isoflavone with anticancer activity promulgated through interference with mitochondrial functions. Using a click chemistry version of the drug together with affinity-enriched mass spectrometry, voltage-dependent anion channels (VDACs) 1 and 2 were identified as drug targets. To determine the importance of VDAC1 or 2 to cytotoxicity, we used lung cancer cells that were either sensitive (H460) or intrinsically resistant (H596) to the drug. In H460 cells, depletion of VDAC1 and VDAC2 by small interfering RNA impacted ME-344 effects by diminishing generation of reactive oxygen species (ROS), preventing mitochondrial membrane potential dissipation, and moderating ME-344-induced cytotoxicity and mitochondrial-mediated apoptosis. Mechanistically, VDAC1 and VDAC2 knockdown prevented ME-344-induced apoptosis by inhibiting Bax mitochondrial translocation and cytochrome c release as well as apoptosis in these H460 cells. We conclude that VDAC1 and 2, as mediators of the response to oxidative stress, have roles in modulating ROS generation, Bax translocation, and cytochrome c release during mitochondrial-mediated apoptosis caused by ME-344. SIGNIFICANCE STATEMENT: Dissecting preclinical drug mechanisms are of significance in development of a drug toward eventual Food and Drug Administration approval.
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Affiliation(s)
- Leilei Zhang
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
| | - Danyelle M Townsend
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
| | - Morgan Morris
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
| | - Eduardo N Maldonado
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
| | - Yu-Lin Jiang
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
| | - Ann-Marie Broome
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
| | - Jennifer R Bethard
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
| | - Kenneth D Tew
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics (L.Z., M.M., E.N.M., Y.-L.J., A.-M.B., J.R.B., L.E.B., K.D.T.) and Department of Pharmaceutical and Biomedical Sciences (D.M.T.), Medical University of South Carolina, Charleston, South Carolina
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23
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Odgers-Jewell K, Ball LE, Reidlinger DP, Isenring EA, Thomas R, Kelly JT. Replicating group-based education interventions for the management of type 2 diabetes: a review of intervention reporting. Diabet Med 2020; 37:768-778. [PMID: 31646673 DOI: 10.1111/dme.14158] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/22/2019] [Indexed: 11/27/2022]
Abstract
AIMS To assess the completeness of reporting of group-based education interventions for the management of type 2 diabetes. METHODS A previous systematic review of group-based education programmes for adults with type 2 diabetes identified eligible intervention studies. Data were extracted and assessed using the Template for Intervention Description and Replication ('TIDieR') checklist. Missing data were sourced from other published material, or by contacting authors. RESULTS Fifty-three publications describing 47 studies were included. No publications sufficiently described all items. Authors of 43 of the 47 included studies (91%) were contacted via e-mail to obtain missing data in order to complete the TIDieR checklist. Seven (16%) did not respond. Additional data were obtained for 33/47 studies (70%). Most studies (45/47, 96%) described the intervention duration and frequency, detailed the procedures and rationale (40/47, 85%), provided a brief intervention name and explained any individual tailoring (38/47, 81%), defined whether providers received training and adequately described how the programme was delivered (37/47, 79%). However, few described any modifications (28/47, 60%), whether the intervention was delivered as planned (27/47, 57%), where it was delivered (21/47, 45%), whether materials were provided (19/47, 40%), and who delivered the intervention (13/47, 28%). CONCLUSIONS Group-based education interventions for the management of type 2 diabetes are poorly reported. To translate effective research into practice, practitioners need sufficient detail to implement evidence-based interventions. Researcher adoption of the TIDieR checklist will assist the translation and replication of published interventions.
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Affiliation(s)
- K Odgers-Jewell
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - L E Ball
- Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia
| | - D P Reidlinger
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - E A Isenring
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - R Thomas
- Institute for Evidence-Based Healthcare, Bond University, Gold Coast, Australia
| | - J T Kelly
- School of Public Health, University of Queensland, Brisbane, Australia
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24
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Hurst KE, Lawrence KA, Robino RA, Ball LE, Chung D, Thaxton JE. Remodeling Translation Primes CD8 + T-cell Antitumor Immunity. Cancer Immunol Res 2020; 8:587-595. [PMID: 32075802 DOI: 10.1158/2326-6066.cir-19-0516] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 11/27/2019] [Accepted: 02/14/2020] [Indexed: 11/16/2022]
Abstract
The requisites for protein translation in T cells are poorly understood and how translation shapes the antitumor efficacy of T cells is unknown. Here we demonstrated that IL15-conditioned T cells were primed by the metabolic energy sensor AMP-activated protein kinase to undergo diminished translation relative to effector T cells. However, we showed that IL15-conditioned T cells exhibited a remarkable capacity to enhance their protein translation in tumors, which effector T cells were unable to duplicate. Studying the modulation of translation for applications in cancer immunotherapy revealed that direct ex vivo pharmacologic inhibition of translation elongation primed robust T-cell antitumor immunity. Our work elucidates that altering protein translation in CD8+ T cells can shape their antitumor capability.
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Affiliation(s)
- Katie E Hurst
- Department of Orthopedics and Physical Medicine, Medical University of South Carolina, Charleston, South Carolina.,Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, South Carolina
| | - Kiley A Lawrence
- Department of Orthopedics and Physical Medicine, Medical University of South Carolina, Charleston, South Carolina.,Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, South Carolina
| | - Rob A Robino
- Department of Orthopedics and Physical Medicine, Medical University of South Carolina, Charleston, South Carolina.,Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, South Carolina
| | - Lauren E Ball
- Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Dongjun Chung
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina.,Hollings Cancer Center, Charleston, South Carolina
| | - Jessica E Thaxton
- Department of Orthopedics and Physical Medicine, Medical University of South Carolina, Charleston, South Carolina. .,Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, South Carolina.,Hollings Cancer Center, Charleston, South Carolina
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25
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Angel PM, Saunders J, Jensen-Smith H, Bruner E, Ford ME, Berkhiser S, Boxall B, Bethard J, Ball LE, Yeh ES, Hollingsworth MA, Mehta AS, Marks JR, Nakshatri H, Drake RR. Abstract P2-10-18: Deciphering racial disparities in breast cancer collagen reorganization by targeted extracellular matrix proteomics. Cancer Res 2020. [DOI: 10.1158/1538-7445.sabcs19-p2-10-18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Although European American women have a higher incidence of breast cancer, African American women have higher mortality rates with increased occurrence of lethal cancers at a younger age. Breast density, characterized by increases in stroma, is a risk factor for breast cancer and African American women have significantly greater odds of high breast density compared to European American women. Genomic profiling of breast cancer by ancestry shows that stromal collagen type genes vary based on African and European ancestry and correlate to differences in breast cancer progression and survival. Contemporary scientific literature describes breast cancer progression as being linked to a “collagen switch” whereby collagen fibers surrounding the tumor are re-organized during later tumor growth to facilitate metastatic spread of cancer activated fibroblasts. However, mechanisms facilitating the “collagen switch” remain mostly unknown, especially at a translational level. Additionally, collagen re-organization has not yet been evaluated for contributions to racial disparities in breast cancer. Our novel extracellular matrix proteomic studies on 17 patient lumpectomies depict that very specific sites on collagen protein types in breast tumor are post-translationally regulated by hydroxylation of proline (HYP) dependent on race (7 African American, 10 European American; no significant age or receptor status difference). By proteomic sequencing, distinct peptide sequences of collagen 1A1, collagen 1A2, and collagen 3A1 are modified by HYP and are significantly regulated when measured in African American versus European American breast tumors. From 16 collagen type proteins, 143 collagen peptides from all breast tumors were identified with HYP modifications (site probability ≥0.95). A total of 16% of the HYP peptides were unique to African American breast tumors. Imaging mass spectrometry that targets collagens reported that specific peptides sequences showed increased hydroxylation of proline in tumors compared to normal adjacent tissue. Interestingly, but not unexpected, translational and post-translational regulation did not always correlate with transcriptional regulation. Investigation on over 300 tissue microarray cores of breast tumor by second harmonic generation microscopy demonstrated significant ancestry-defined regulation of collagen fibers. For example, compared to breast tumor tissue cores of European American ancestry, African American breast tumor tissue cancer cores showed significant overall increases in collagen fibril length with decreased collagen fibril straightness (two-tailed student’s t-test p-value <0.05). Imaging mass spectrometry that targets collagens done on the identical set of 300 ancestry-defined tissue microarray cores supports that ancestry of breast tumor correlates with site specific collagen modification by hydroxylation of prolines. For instance, COL3A1 peptide GPAGIPx GFPx shows a nearly 3-fold increase in African American breast tumors compared to European breast tumors (Mann-Whitney p-value ≤0.02; area under the receiver operating curve 0.81, p-value ≤0.0001; HYP site probability of 1.00 for each proline designated Px). Since HYP stabilizes collagen triple helices, we hypothesize that HYP alteration at specific sites in collagen protein types from African American breast tumors may reflect a change in collagen flexibility that contributes to an earlier metastatic collagen switch than in European American breast tumors. Current work determines ancestry-related changes in collagen fibers per breast cancer type and per normal adjacent tissue. To summarize, we provide the first evidence that post-translational regulation of collagen types may contribute to racial disparities in breast cancer.
Citation Format: Peggi M Angel, Janet Saunders, Heather Jensen-Smith, Evelyn Bruner, Marvella E. Ford, Savanna Berkhiser, Baylye Boxall, Jennifer Bethard, Lauren E. Ball, Elizabeth S. Yeh, Michael A. Hollingsworth, Anand S. Mehta, Jeffrey R. Marks, Harikrishna Nakshatri, Richard R. Drake. Deciphering racial disparities in breast cancer collagen reorganization by targeted extracellular matrix proteomics [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P2-10-18.
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Affiliation(s)
- Peggi M Angel
- 1Medical University of South Carolina, Charleston, SC
| | | | | | - Evelyn Bruner
- 1Medical University of South Carolina, Charleston, SC
| | | | | | - Baylye Boxall
- 1Medical University of South Carolina, Charleston, SC
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26
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Kruyer A, Ball LE, Townsend DM, Kalivas PW, Uys JD. Post-translational S-glutathionylation of cofilin increases actin cycling during cocaine seeking. PLoS One 2019; 14:e0223037. [PMID: 31550273 PMCID: PMC6759170 DOI: 10.1371/journal.pone.0223037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 09/13/2019] [Indexed: 01/11/2023] Open
Abstract
Neuronal defense against oxidative damage is mediated primarily by the glutathione redox system. Traditionally considered a mechanism to protect proteins from irreversible oxidation, mounting evidence supports a role for protein S-glutathionylation in cell signaling in response to changes in intracellular redox status. Here we determined the specific sites on the actin binding protein cofilin that undergo S-glutathionylation. In addition, we show that S-glutathionylation of cofilin reduces its capacity to depolymerize F-actin. We further describe an assay to determine the S-glutathionylation of target proteins in brain tissue from behaving rodents. Using this technique, we show that cofilin in the rat nucleus accumbens undergoes S-glutathionylation during 15-minutes of cued cocaine seeking in the absence of cocaine. Our findings demonstrate that cofilin S-glutathionylation is increased in response to cocaine-associated cues and that increased cofilin S-glutathionylation reduces cofilin-dependent depolymerization of F-actin. Thus, S-glutathionylation of cofilin may serve to regulate actin cycling in response to drug-conditioned cues.
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Affiliation(s)
- Anna Kruyer
- Department of Neuroscience, Medical University of South Carolina, Charleston, SC, United States of America
- * E-mail: (AK); (JU)
| | - Lauren E. Ball
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, United States of America
| | - Danyelle M. Townsend
- Department of Drug Discovery and Pharmaceutical Sciences, Medical University of South Carolina, Charleston, SC, United States of America
| | - Peter W. Kalivas
- Department of Neuroscience, Medical University of South Carolina, Charleston, SC, United States of America
| | - Joachim D. Uys
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, United States of America
- * E-mail: (AK); (JU)
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27
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Clift CL, Bethard J, Comte-Walters S, Ball LE, Bichell D, Su YR, Mehta A, Drake RR, Angel PM. Abstract 514: Proteomic Characterization of Extracellular Matrix Regulation in Human Aortic Valve Development and Disease. Circ Res 2019. [DOI: 10.1161/res.125.suppl_1.514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We present the first report of the collagen protein interactome in human aortic valve (AV) development and disease. AV disease affects up to 13% of the world population. As no therapies are available, patients must “watch and wait” until surgical valve replacement is necessary to prevent heart failure. Extracellular matrix (ECM) forms the basis for correct valve function but alterations of the ECM scaffold during development and disease are not well defined. Here, we report ECM protein regulation from a cohort of 26 valvular tissues in four pathological categories: normal functioning AVs, pediatric end-stage congenital aortic valve stenosis (CAVS), adult end-stage fibrocalcific aortic valve stenosis (FAVS), and a pulmonic Ross operation valve. A novel proteomic method was used to target ECM proteins, primarily collagens, for sequence analysis from FFPE 5-μm thin tissue sections. Collagens represented 19/49 proteins identified (39%); A total of 46/49 ECM proteins (94%) were implicated in direct interactions in collagen synthesis, regulation or modification. Data suggested dynamic regulation of collagen types during age and disease, e.g., Col15a1 was found only in normal AV, whereas Col4a1 was reported only in patients younger than 5 years. Upstream regulators of the collagen interactome included COLQ1, IGFBP2, and SPARC. Detailed peptide sequence analysis reported 70 specific collagen peptide sequences containing up to multiple hydroxylated prolines (HYP), a post-translational modification critical to stabilizing the collagen triple helix. Quantitative data analysis on HYP peptides reported differential regulation across patient categories – i.e., Col3a1 peptides show 52% increased HYP in CAVS compared to age matched normal valve. Interestingly, the pulmonic Ross valve represented unique collagen HYP signatures distinct from all other aortic valve tissues. Tissue from pediatric end-stage CAVS patients showed a higher percentage of hydroxylated peptides compared to non-hydroxylated peptides (33%) as compared to normal (25%) or adult end-stage FAVS (16%). We anticipate that the completed study will be useful to targeted therapies aiming to inhibit fibrosis and ECM remodeling, and may better inform engineered options for valve replacement.
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28
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Zhang L, Zhang J, Ye Z, Manevich Y, Ball LE, Bethard JR, Jiang YL, Broome AM, Dalton AC, Wang GY, Townsend DM, Tew KD. Isoflavone ME-344 Disrupts Redox Homeostasis and Mitochondrial Function by Targeting Heme Oxygenase 1. Cancer Res 2019; 79:4072-4085. [PMID: 31227482 DOI: 10.1158/0008-5472.can-18-3503] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 02/12/2019] [Accepted: 06/17/2019] [Indexed: 12/19/2022]
Abstract
ME-344 is a second-generation isoflavone with unusual cytotoxic properties that is in clinical testing in cancer. To identify targets that contribute to its anticancer activity and therapeutic index, we used lung cancer cell lines that are naturally sensitive or resistant to ME-344. Drug-induced apoptosis was linked with enhanced levels of reactive oxygen species and this initiated a nuclear erythroid factor 2-like 2 signaling response, downstream of which, heme oxygenase 1 (HO-1) was also found to be time-dependently inhibited by ME-344. ME-344 specifically bound to, and altered, HO-1 structure and increased HO-1 translocation from the rough endoplasmic reticulum to mitochondria, but only in drug-sensitive cells. These effects did not occur in either drug-resistant or primary lung fibroblasts with lower HO-1 basal levels. HO-1 was confirmed as a drug target by using surface plasmon resonance technology and through interaction with a clickable ME-344 compound (M2F) and subsequent proteomic analyses, showing direct binding of ME-344 with HO-1. Proteomic analysis showed that clusters of mitochondrial proteins, including voltage-dependent anion-selective channels, were also impacted by ME-344. Human lung cancer biopsies expressed higher levels of Nrf2 and HO-1 compared with normal tissues. Overall, our data show that ME-344 inhibits HO-1 and impacts its mitochondrial translocation. Other mitochondrial proteins are also affected, resulting in interference in tumor cell redox homeostasis and mitochondrial function. These factors contribute to a beneficial therapeutic index and support continued clinical development of ME-344. SIGNIFICANCE: A novel cytotoxic isoflavone is shown to inhibit heme oxygenase, a desirable yet elusive target that disrupts redox homeostasis causing cell death.
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Affiliation(s)
- Leilei Zhang
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Jie Zhang
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Zhiwei Ye
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Yefim Manevich
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Jennifer R Bethard
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Yu-Lin Jiang
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Ann-Marie Broome
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina
| | - Annamarie C Dalton
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina
| | - Gavin Y Wang
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Danyelle M Townsend
- Department of Pharmaceutical and Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina.
| | - Kenneth D Tew
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina.
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Heyns IM, Pfukwa R, Bertossi L, Ball LE, Kelland MA, Klumperman B. Thermoresponsive behavior of poly(3-methylene-2-pyrrolidone) derivatives. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.10.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Ross LJ, Barnes KA, Ball LE, Mitchell LJ, Sladdin I, Lee P, Williams LT. Effectiveness of dietetic consultation for lowering blood lipid levels in the management of cardiovascular disease risk: A systematic review and meta-analysis of randomised controlled trials. Nutr Diet 2019; 76:199-210. [PMID: 30714668 PMCID: PMC6850486 DOI: 10.1111/1747-0080.12509] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 07/26/2018] [Revised: 11/06/2018] [Accepted: 11/19/2018] [Indexed: 11/30/2022]
Abstract
AIM Evidence of the effectiveness of dietetic consultation for the management of cardiovascular disease (CVD) risk factors has not been previously synthesised. A systematic review and four meta-analyses evaluated the effectiveness of dietetic consultation for lowering blood lipid levels in high-risk individuals in primary health-care settings. METHODS Of the 4860 records identified, 10 eligible randomised controlled trials (RCTs, n = 1530) were evaluated for reporting blood lipid outcomes following dietetic consultation (DN)-defined as at least one exclusive individual face-to-face consultation with a dietitian and comparators (C)-defined as no nutrition intervention or usual or minimal care provided by physicians and/or nurses. RESULTS DN groups were effective for lowering blood lipid levels across nine studies reporting total cholesterol (TC) and LDL; and across five of six studies reporting triglycerides (TG). Between-group differences were not consistently assessed, with significance levels reported in four studies all in favour of DN, P < 0.05. Meta-analyses for TC and LDL (seven studies) confirmed DN and C groups were equally effective, P > 0.05; and for TG (six studies) DN groups were significantly more effective than C groups, P < 0.05). CONCLUSIONS This review provides RCT evidence that dietetic counselling is effective for lowering TG levels and at least as effective as usual and minimal care for improving cholesterol levels in high-risk individuals in primary health care. However, more adequate reporting of methods and greater consistency in timing interventions and data collection will enhance the quality of the evidence and increase confidence in the health benefits of dietetic counselling for the management of CVD risk.
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Affiliation(s)
- Lynda J Ross
- Menzies Health Institute Queensland, Queensland, Australia.,Griffith University, Gold Coast, Brisbane, Queensland, Australia
| | - Katelyn A Barnes
- Griffith University, Gold Coast, Brisbane, Queensland, Australia
| | - Lauren E Ball
- Menzies Health Institute Queensland, Queensland, Australia.,Griffith University, Gold Coast, Brisbane, Queensland, Australia
| | - Lana J Mitchell
- Menzies Health Institute Queensland, Queensland, Australia.,Griffith University, Gold Coast, Brisbane, Queensland, Australia
| | - Ishtar Sladdin
- Menzies Health Institute Queensland, Queensland, Australia.,Griffith University, Gold Coast, Brisbane, Queensland, Australia
| | - Patricia Lee
- Griffith University, Gold Coast, Brisbane, Queensland, Australia
| | - Lauren T Williams
- Menzies Health Institute Queensland, Queensland, Australia.,Griffith University, Gold Coast, Brisbane, Queensland, Australia
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Angel PM, Schwamborn K, Comte-Walters S, Clift CL, Ball LE, Mehta AS, Drake RR. Extracellular Matrix Imaging of Breast Tissue Pathologies by MALDI-Imaging Mass Spectrometry. Proteomics Clin Appl 2018; 13:e1700152. [PMID: 30251340 DOI: 10.1002/prca.201700152] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [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: 04/05/2018] [Revised: 08/31/2018] [Indexed: 12/28/2022]
Abstract
PURPOSE A new method accessing proteins from extracellular matrix by imaging mass spectrometry (ECM IMS) has been recently reported. ECM IMS is evaluated for use in exploring breast tissue pathologies. EXPERIMENTAL DESIGN A tissue microarray (TMA) is analyzed that has 176 cores of biopsies and lumpectomies spanning breast pathologies of inflammation, hyperplasia, fibroadenoma, invasive ductal carcinoma, and invasive lobular carcinoma and normal adjacent to tumor (NAT). NAT is compared to subtypes by area under the receiver operating curve (ROC) >0.7. A lumpectomy is also characterized for collagen organization by microscopy and stromal protein distribution by IMS. LC-based high-resolution accurate mass (HRAM) proteomics is used to identify proteins from the lumpectomy. RESULTS TMA analysis shows distinct spectral signatures reflecting a heterogeneous tissue microenvironment. Ninety-four peaks show an ROC > 0.7 compared to NAT; NAT has overall higher intensities. Lumpectomy analysis by IMS visualizes a complex central tumor region with distal tumor regions. A total of 39 stromal proteins are identified by HRAM LC-based proteomics. Accurate mass matches between image data and LC-based proteomics demonstrate a heterogeneous collagen type environment in the central tumor. CONCLUSIONS Data portray the heterogeneous stromal microenvironment of breast pathologies, including alteration of multiple collagen-type patterns. ECM IMS is a promising new tool for investigating the stromal microenvironment of breast tissue including cancer.
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Affiliation(s)
- Peggi M Angel
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC, 29425
| | | | - Susana Comte-Walters
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC, 29425
| | - Cassandra L Clift
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC, 29425
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC, 29425
| | - Anand S Mehta
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC, 29425
| | - Richard R Drake
- Department of Cell and Molecular Pharmacology, MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC, 29425
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Ball LE, Barnes KA, Crossland L, Nicholson C, Jackson C. Questionnaires that measure the quality of relationships between patients and primary care providers: a systematic review. BMC Health Serv Res 2018; 18:866. [PMID: 30453957 PMCID: PMC6245854 DOI: 10.1186/s12913-018-3687-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 04/15/2018] [Accepted: 11/05/2018] [Indexed: 11/10/2022] Open
Abstract
Background International guidance on models of care stress the importance of good quality, continuous patient-provider relationships to support high quality and efficient care and hospital avoidance. However, assessing the quality of patient-provider relationships is challenging due to its experiential nature. The aim of this study was to undertake a systematic review to identify questionnaires previously developed or used to assess the quality of continuous relationships between patients and their provider in primary care. Methods MEDLINE, PubMed, Cumulative Index of Nursing and Allied Health Literature (CINAHL) and SCOPUS databases were searched for English language studies published between 2009 and 2017. Key terms used identified studies conducted in the primary care setting examining relationships between patients and providers. Studies that focused on the conceptualisation, development, testing or review of a questionnaire, or studies that used a questionnaire for assessing the quality of continuous relationships between patients and providers were eligible. Studies that did not assess quality via a questionnaire, only assessed single aspects of relationships, only assessed single encounters, assessed transitions between settings or assessed relationships using an index were excluded. Information on validity testing of each relevant questionnaire identified from articles was reviewed to inform recommendations for future research and evaluation. Results Twenty-seven studies met the eligibility criteria, including 14 unique questionnaires. The questionnaires were diverse in length, scope, focus and level of validity testing. Five questionnaires were considered not feasible for future use due to size and lack of development work. Three questionnaires were considered strongest candidates for use in future work based on being relevant to the topic and primary care setting, freely available in English and not needing additional pilot work prior to use. These three questionnaires were the Care Continuity Across Levels of Care Scale, the Nijmegan Continuity Questionnaire and the Patient-Doctor Depth of Relationship Tool. Conclusions This study provides an overview of 14 unique questionnaires that have been used to assess the quality of continuous relationships between patients and primary care providers. The decision to use one of the questionnaires in future work requires careful consideration, including the scope, length, validation testing, accessibility of the questionnaires and their alignment with the initiative being evaluated.
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Affiliation(s)
- Lauren E Ball
- Centre for Health System Reform and Integration, UQ-Mater Research Institute, Brisbane, Australia. .,Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast, QLD, 4222, Australia.
| | - Katelyn A Barnes
- Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, Gold Coast, QLD, 4222, Australia
| | - Lisa Crossland
- Centre for Health System Reform and Integration, UQ-Mater Research Institute, Brisbane, Australia
| | - Caroline Nicholson
- Centre for Health System Reform and Integration, UQ-Mater Research Institute, Brisbane, Australia
| | - Claire Jackson
- Centre for Health System Reform and Integration, UQ-Mater Research Institute, Brisbane, Australia
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Kim MJ, Vargas MR, Harlan BA, Killoy KM, Ball LE, Comte-Walters S, Gooz M, Yamamoto Y, Beckman JS, Barbeito L, Pehar M. Nitration and Glycation Turn Mature NGF into a Toxic Factor for Motor Neurons: A Role for p75 NTR and RAGE Signaling in ALS. Antioxid Redox Signal 2018; 28:1587-1602. [PMID: 28537420 PMCID: PMC5962334 DOI: 10.1089/ars.2016.6966] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Glycating stress can occur together with oxidative stress during neurodegeneration and contribute to the pathogenic mechanism. Nerve growth factor (NGF) accumulates in several neurodegenerative diseases. Besides promoting survival, NGF can paradoxically induce cell death by signaling through the p75 neurotrophin receptor (p75NTR). The ability of NGF to induce cell death is increased by nitration of its tyrosine residues under conditions associated with increased peroxynitrite formation. AIMS Here we investigated whether glycation also changes the ability of NGF to induce cell death and assessed the ability of post-translational modified NGF to signal through the receptor for advanced glycation end products (RAGEs). We also explored the potential role of RAGE-p75NTR interaction in the motor neuron death occurring in amyotrophic lateral sclerosis (ALS) models. RESULTS Glycation promoted NGF oligomerization and ultimately allowed the modified neurotrophin to signal through RAGE and p75NTR to induce motor neuron death at low physiological concentrations. A similar mechanism was observed for nitrated NGF. We provide evidence for the interaction of RAGE with p75NTR at the cell surface. Moreover, we observed that post-translational modified NGF was present in the spinal cord of an ALS mouse model. In addition, NGF signaling through RAGE and p75NTR was involved in astrocyte-mediated motor neuron toxicity, a pathogenic feature of ALS. INNOVATION Oxidative modifications occurring under stress conditions can enhance the ability of mature NGF to induce neuronal death at physiologically relevant concentrations, and RAGE is a new p75NTR coreceptor contributing to this pathway. CONCLUSION Our results indicate that NGF-RAGE/p75NTR signaling may be a therapeutic target in ALS. Antioxid. Redox Signal. 28, 1587-1602.
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Affiliation(s)
- Mi Jin Kim
- 1 Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina , Charleston, South Carolina
| | - Marcelo R Vargas
- 1 Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina , Charleston, South Carolina
| | - Benjamin A Harlan
- 1 Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina , Charleston, South Carolina
| | - Kelby M Killoy
- 1 Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina , Charleston, South Carolina
| | - Lauren E Ball
- 1 Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina , Charleston, South Carolina
| | - Susana Comte-Walters
- 1 Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina , Charleston, South Carolina
| | - Monika Gooz
- 2 Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina , Charleston, South Carolina
| | - Yasuhiko Yamamoto
- 3 Department of Biochemistry and Molecular Vascular Biology, Kanazawa University Graduate School of Medical Sciences , Kanazawa, Japan
| | - Joseph S Beckman
- 4 Department of Biochemistry and Biophysics, Linus Pauling Institute, Environmental Health Sciences Center, Oregon State University , Corvallis, Oregon
| | - Luis Barbeito
- 5 Institut Pasteur de Montevideo , Montevideo, Uruguay
| | - Mariana Pehar
- 1 Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina , Charleston, South Carolina
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LIU BING, Barrero OS, Sahu C, Ball LE, Hogquist KA, Ruan H. FOXP3 O‐GlcNAcylation Controls Regulatory T Cell Homeostasis and Suppressive Function. FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.673.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- BING LIU
- University of MinnesotaMinneapolisMN
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35
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Angel PM, Comte-Walters S, Ball LE, Talbot K, Mehta A, Brockbank KGM, Drake RR. Mapping Extracellular Matrix Proteins in Formalin-Fixed, Paraffin-Embedded Tissues by MALDI Imaging Mass Spectrometry. J Proteome Res 2017; 17:635-646. [PMID: 29161047 DOI: 10.1021/acs.jproteome.7b00713] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [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: 02/08/2023]
Abstract
Collagens and elastin form the fundamental framework of all tissues and organs, and their expression and post-translational processing are tightly regulated in disease and health. Because of their unique structural composition and properties, it is a recognized challenge to access these protein structures within the complex tissue microenvironment to understand how localized changes modulate tissue health. We describe a new workflow using a combination of matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI IMS) with matrix metalloproteinase (MMP) enzymes to access and report on spatial localization of collagen and elastin sequences in formalin-fixed, paraffin-embedded (FFPE) tissues. The developed technology provides new access to collagens and elastin sequences localized to tissue features that were previously unattainable. This high-throughput technological advance should be applicable to any tissue regardless of disease type, tissue origin, or disease status and is thus relevant to all research: basic, translational, or clinical.
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Affiliation(s)
| | | | | | | | | | - Kelvin G M Brockbank
- Tissue Testing Technologies LLC , North Charleston, South Carolina 29406, United States.,Department of Bioengineering, Clemson University , Clemson, South Carolina 29634, United States
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Herr DJ, Baarine M, Aune SE, Li X, Ball LE, Lemasters JJ, Beeson CC, Chou JC, Menick DR. HDAC1 localizes to the mitochondria of cardiac myocytes and contributes to early cardiac reperfusion injury. J Mol Cell Cardiol 2017; 114:309-319. [PMID: 29224834 DOI: 10.1016/j.yjmcc.2017.12.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [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: 09/27/2017] [Revised: 11/30/2017] [Accepted: 12/05/2017] [Indexed: 01/15/2023]
Abstract
RATIONALE Recent evidence indicates that histone deacetylase enzymes (HDACs) contribute to ischemia reperfusion (I/R) injury, and pan-HDAC inhibitors have been shown to be cardioprotective when administered either before an ischemic insult or during reperfusion. We have shown previously that selective inhibition of class I HDACs provides superior cardioprotection when compared to pan-HDAC inhibition in a pretreatment model, but selective class I HDAC inhibition has not been tested during reperfusion, and specific targets of class I HDACs in I/R injury have not been identified. OBJECTIVE We hypothesized that selective inhibition of class I HDACs with the drug MS-275 (entinostat) during reperfusion would improve recovery from I/R injury in the first hour of reperfusion. METHODS AND RESULTS Hearts from male Sprague-Dawley rats were subjected to ex vivo I/R injury±MS-275 class I HDAC inhibition during reperfusion alone. MS-275 significantly attenuated I/R injury, as indicated by improved LV function and tissue viability at the end of reperfusion. Unexpectedly, we observed that HDAC1 is present in the mitochondria of cardiac myocytes, but not fibroblasts or endothelial cells. We then designed mitochondria-restricted and mitochondria-excluded HDAC inhibitors, and tested both in our ex vivo I/R model. The selective inhibition of mitochondrial HDAC1 attenuated I/R injury to the same extent as MS-275, whereas the mitochondrial-excluded inhibitor did not. Further assays demonstrated that these effects are attributable to a decrease in SDHA activity and subsequent metabolic ROS production in reperfusion. CONCLUSIONS We demonstrate for the first time that HDAC1 is present within the mitochondria of cardiac myocytes, and mitochondrial HDAC1 contributes significantly to I/R injury within the first hour of reperfusion.
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Affiliation(s)
- Daniel J Herr
- Department of Medicine, Division of Cardiology, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Mauhamad Baarine
- Department of Medicine, Division of Cardiology, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Sverre E Aune
- Department of Medicine, Division of Cardiology, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Xiaoyang Li
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Lauren E Ball
- Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston, SC 29425, United States
| | - John J Lemasters
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC 29425, United States; Center for Cell Death, Injury & Regeneration, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Craig C Beeson
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC 29425, United States
| | - James C Chou
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Donald R Menick
- Department of Medicine, Division of Cardiology, Medical University of South Carolina, Charleston, SC 29425, United States; Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC 29425, United States.
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Mitchell LJ, Ball LE, Ross LJ, Barnes KA, Williams LT. Effectiveness of Dietetic Consultations in Primary Health Care: A Systematic Review of Randomized Controlled Trials. J Acad Nutr Diet 2017; 117:1941-1962. [PMID: 28826840 DOI: 10.1016/j.jand.2017.06.364] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 06/27/2017] [Indexed: 01/19/2023]
Abstract
BACKGROUND A dietetic consultation is a structured process aimed at supporting individual patients to modify their dietary behaviors to improve health outcomes. The body of evidence on the effectiveness of nutrition care provided by dietitians in primary health care settings has not previously been synthesized. This information is important to inform the role of dietitians in primary health care service delivery. OBJECTIVE The aim of this systematic review was to evaluate the evidence of the effectiveness of individual consultations provided exclusively by dietitians in primary care to support adult patients to modify dietary intake and improve health outcomes. STUDY DESIGN ProQuest Family Health, Scopus, PubMed Central, Medline, the Cumulative Index to Nursing and Allied Health Literature, and Cochrane databases were searched for English language systematic reviews or randomized controlled trials published before October 2016. The key terms used identified the provision of nutrition care exclusively by a dietitian in a primary health care setting aimed at supporting adult patients to modify dietary behaviors and/or improve biomarkers of health. Interventions delivered to patients aged younger than 18 years, in hospital, via telephone only, in a group or lecture setting, or by a multidisciplinary team were excluded. The methodologic quality of each study was appraised using the Cochrane Risk of Bias tool and the body of evidence was assessed using the Academy of Nutrition and Dietetics Evidence Analysis Manual. MAIN OUTCOME MEASURES Outcomes included the effectiveness of dietetic interventions in terms of anthropometry, clinical indicators, and dietary intake. A statistically significant between-group difference was used to indicate intervention effectiveness (P<0.05). RESULTS Twenty-six randomized controlled studies met eligibility criteria, representing 5,500 adults receiving dietetic consultations in a primary care setting. Eighteen of 26 included studies showed statistically significant differences in dietary, anthropometric, or clinical indicators between intervention and comparator groups. When focusing specifically on each study's stated aim, significant improvements favoring the intervention compared with control were found for the following management areas: glycemic control (four out of four studies), dietary change (four out of four studies), anthropometry (four out of seven studies), cholesterol (two out of eight studies), triglycerides (one out of five), and blood pressure (zero out of three) studies. CONCLUSIONS Dietetic consultations for adults in primary care settings appear to be effective for improvement in diet quality, diabetes outcomes (including blood glucose and glycated haemoglobin values), and weight loss outcomes (eg, changes in weight and waist circumference) and to limit gestational weight gain (Grade II: Fair evidence). Research evaluated in this review does not provide consistent support for the effectiveness of direct dietetic counseling alone in achieving outcomes relating to plasma lipid levels and blood pressure (Grade III: Limited evidence). Therefore, to more effectively control these cardiovascular disease risk factors, future research might explore novel nutrition counseling approaches as well as dietitians functioning as part of multidisciplinary teams.
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Odgers-Jewell K, Ball LE, Kelly JT, Isenring EA, Reidlinger DP, Thomas R. Effectiveness of group-based self-management education for individuals with Type 2 diabetes: a systematic review with meta-analyses and meta-regression. Diabet Med 2017; 34:1027-1039. [PMID: 28226200 DOI: 10.1111/dme.13340] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/17/2017] [Indexed: 12/17/2022]
Abstract
AIMS Patient education for the management of Type 2 diabetes can be delivered in various forms, with the goal of promoting and supporting positive self-management behaviours. This systematic review aimed to determine the effectiveness of group-based interventions compared with individual interventions or usual care for improving clinical, lifestyle and psychosocial outcomes in people with Type 2 diabetes. METHODS Six electronic databases were searched. Group-based education programmes for adults with Type 2 diabetes that measured glycated haemoglobin (HbA1c ) and followed participants for ≥ 6 months were included. The primary outcome was HbA1c , and secondary outcomes included fasting blood glucose, weight, body mass index, waist circumference, blood pressure, blood lipid profiles, diabetes knowledge and self-efficacy. RESULTS Fifty-three publications describing 47 studies were included (n = 8533 participants). Greater reductions in HbA1c occurred in group-based education compared with controls at 6-10 months [n = 30 studies; mean difference (MD) = 3 mmol/mol (0.3%); 95% confidence interval (CI): -0.48, -0.15; P = 0.0002], 12-14 months [n = 27 studies; MD = 4 mmol/mol (0.3%); 95% CI: -0.49, -0.17; P < 0.0001], 18 months [n = 3 studies; MD = 8 mmol/mol (0.7%); 95% CI: -1.26, -0.18; P = 0.009] and 36-48 months [n = 5 studies; MD = 10 mmol/mol (0.9%); 95% CI: -1.52, -0.34; P = 0.002], but not at 24 months. Outcomes also favoured group-based education for fasting blood glucose, body weight, waist circumference, triglyceride levels and diabetes knowledge, but not at all time points. Interventions facilitated by a single discipline, multidisciplinary teams or health professionals with peer supporters resulted in improved outcomes in HbA1c when compared with peer-led interventions. CONCLUSIONS Group-based education interventions are more effective than usual care, waiting list control and individual education at improving clinical, lifestyle and psychosocial outcomes in people with Type 2 diabetes.
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Affiliation(s)
- K Odgers-Jewell
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - L E Ball
- Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia
| | - J T Kelly
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - E A Isenring
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - D P Reidlinger
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia
| | - R Thomas
- Centre for Research in Evidence-Based Practice (CREBP), Bond University, Gold Coast, Australia
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Herr DJ, Baarine M, Aune S, Beeson CC, Ball LE, Menick DR. Abstract 141: Class I Histone Deacetylases Localize to Cardiac Myocyte Mitochondria and Contribute to Ischemia Reperfusion Injury. Circ Res 2017. [DOI: 10.1161/res.121.suppl_1.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Approximately half of the damage done to the heart by a myocardial infarction occurs during reperfusion of the ischemic region while the patient is in the care of the treatment team. While many different adjuvant treatments have been explored in an attempt to attenuate this ischemia-reperfusion (I/R) injury, little progress has been made in translating novel therapies to the clinic. Recently, it was discovered that epigenetic enzymes contribute to reperfusion-induced damage, but little is known about the exact mechanism by which they exacerbate I/R injury. Previously, we have shown that class I histone deacetylase (HDACs) activity acutely exacerbates I/R injury, and that inhibition of class I HDACs with MS-275 (entinostat) preserves left-ventricular (LV) function and substantially reduces the area of infarcted tissue in isolated rat hearts subjected to ischemia-reperfusion (IR) injury. Notably, this protective effect occurs whether MS-275 is given as a pretreatment or during the reperfusion phase alone. Given the acute nature of this protective effect, we hypothesized that class I HDACs mediate reperfusion injury by modulating the acetylation state of non-histone proteins in signaling cascades that are essential to cell survival. To examine this, hearts from male Sprague-Dawley rats were subjected to
ex vivo
I/R injury +/- class I HDAC inhibition during reperfusion. We then performed mass spectrometry to analyze the changes in the acetylome between sham and I/R groups with and without class I HDAC inhibition. Unexpectedly, mass spectrometry analysis revealed significant changes in the acetylation state of multiple mitochondrial enzymes. Further biochemical studies show that class I HDACs localize to cardiac mitochondria and may directly modulate mitochondrial acetylation. Interestingly, these effects are correlated with a reduction in the mitochondrial respiratory capacity and mitochondrial oxidative stress during reperfusion. This study is the first to identify a class I HDAC that localizes to the mitochondria and emphasizes the importance of exploring class I HDAC inhibitors for protection against ischemia-reperfusion injury.
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Cass SJ, Ball LE, Leveritt MD. Passive interventions in primary healthcare waiting rooms are effective in promoting healthy lifestyle behaviours: an integrative review. Aust J Prim Health 2016; 22:198-210. [PMID: 27117952 DOI: 10.1071/py15043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 10/17/2015] [Indexed: 11/23/2022]
Abstract
Primary healthcare waiting rooms have the potential to provide health-promoting environments to support healthy lifestyle behaviours such as smoking cessation, weight management and safe contraception. Passive interventions are cost-effective and continually available within an environment or setting, allowing individuals to interact, engage and learn about topics. The aim of this study was to undertake an integrative review to investigate the effectiveness of passive health-related waiting room interventions in improving healthy lifestyle behaviours, as well as precursors to behaviour change. The integrative review encompassed five phases: problem identification, literature search, data evaluation, data analysis and presentation of results. Quantitative, qualitative and mixed methods studies were included. Of the 9205 studies originally identified, 33 publications were included and grouped under four areas: knowledge about a health condition or behaviour, attitudes and intentions towards a health condition or behaviour, healthcare use and interactions, and health-related behaviours. Overall, the passive interventions had a general positive influence on knowledge, intentions, healthcare use and behaviours. Variable outcomes were reported regarding attitude towards a health topic. Few studies were assessed as both high quality and the highest suitability to assess effectiveness of interventions. Consideration of the clinical significance of improvements is warranted before implementation of future interventions. Overall, passive waiting room interventions appear to be effective in promoting healthy lifestyle behaviours.
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Affiliation(s)
- Sarah J Cass
- School of Human Movement and Nutrition Sciences, The University of Queensland, St Lucia, Qld 4072, Australia
| | - Lauren E Ball
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Parklands Drive, Southport, Qld 4222, Australia
| | - Michael D Leveritt
- School of Human Movement and Nutrition Sciences, The University of Queensland, St Lucia, Qld 4072, Australia
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Herr DJ, Aune SE, Bethard JR, Ball LE, Menick DR. Abstract 443: Class I Histone Deacetylases Mediate Cardiac I/R Injury and Modify the Mitochondrial Acetylome. Circ Res 2016. [DOI: 10.1161/res.119.suppl_1.443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Although rapid reperfusion of ischemic tissue is the treatment of choice for myocardial infarction, a significant amount of damage occurs as a result of reperfusion itself. The role of epigenetic enzymes in modulating this damage has become an area of interest in basic cardiac research. Previously, we have shown that pharmacological inhibition of the class I histone deacetylases (HDACs) with MS-275 (entinostat) preserves left-ventricular (LV) function and substantially reduces the area of infarcted tissue in isolated rat hearts subjected to ischemia-reperfusion (IR) injury. Interestingly, we have also observed that class I HDAC inhibition during 60 minutes of reperfusion alone is sufficient to protect cardiac tissue viability following I/R injury. Therefore, we hypothesized that class I HDACs mediate reperfusion injury by modulating acetylation of non-canonical pathways. To examine this, hearts from male Sprague-Dawley rats were subjected to I/R injury +/- class I HDAC inhibition during reperfusion. We then performed mass spectrometry to analyze the changes in the acetylome between sham and I/R groups with and without class I HDAC inhibition. Unexpectedly, mass spectrometry analysis revealed significant changes in the acetylation state of multiple mitochondrial enzymes. Further biochemical studies show that class I HDACs localize to the mitochondrial fraction of cardiac tissue homogenates and may modulate mitochondrial acetylation by direct or indirect mechanisms. This study emphasizes the importance of exploring class I HDAC inhibitors for protection against ischemia-reperfusion injury.
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Uys JD, McGuier NS, Gass JT, Griffin WC, Ball LE, Mulholland PJ. Chronic intermittent ethanol exposure and withdrawal leads to adaptations in nucleus accumbens core postsynaptic density proteome and dendritic spines. Addict Biol 2016; 21:560-74. [PMID: 25787124 DOI: 10.1111/adb.12238] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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: 01/05/2023]
Abstract
Alcohol use disorder is a chronic relapsing brain disease characterized by the loss of ability to control alcohol (ethanol) intake despite knowledge of detrimental health or personal consequences. Clinical and pre-clinical models provide strong evidence for chronic ethanol-associated alterations in glutamatergic signaling and impaired synaptic plasticity in the nucleus accumbens (NAc). However, the neural mechanisms that contribute to aberrant glutamatergic signaling in ethanol-dependent individuals in this critical brain structure remain unknown. Using an unbiased proteomic approach, we investigated the effects of chronic intermittent ethanol (CIE) exposure on neuroadaptations in postsynaptic density (PSD)-enriched proteins in the NAc of ethanol-dependent mice. Compared with controls, CIE exposure significantly changed expression levels of 50 proteins in the PSD-enriched fraction. Systems biology and functional annotation analyses demonstrated that the dysregulated proteins are expressed at tetrapartite synapses and critically regulate cellular morphology. To confirm this latter finding, the density and morphology of dendritic spines were examined in the NAc core of ethanol-dependent mice. We found that CIE exposure and withdrawal differentially altered dendrite diameter and dendritic spine density and morphology. Through the use of quantitative proteomics and functional annotation, these series of experiments demonstrate that ethanol dependence produces neuroadaptations in proteins that modify dendritic spine morphology. In addition, these studies identified novel PSD-related proteins that contribute to the neurobiological mechanisms of ethanol dependence that drive maladaptive structural plasticity of NAc neurons.
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Affiliation(s)
- Joachim D. Uys
- Department of Cell and Molecular Pharmacology; Medical University of South Carolina; Charleston SC USA
| | - Natalie S. McGuier
- Department of Neuroscience; Medical University of South Carolina; Charleston SC USA
| | - Justin T. Gass
- Department of Neuroscience; Medical University of South Carolina; Charleston SC USA
| | - William C. Griffin
- Department of Psychiatry and Behavioral Sciences; Medical University of South Carolina; Charleston SC USA
| | - Lauren E. Ball
- Department of Cell and Molecular Pharmacology; Medical University of South Carolina; Charleston SC USA
| | - Patrick J. Mulholland
- Department of Neuroscience; Medical University of South Carolina; Charleston SC USA
- Department of Psychiatry and Behavioral Sciences; Medical University of South Carolina; Charleston SC USA
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Wang X, Yuan ZF, Fan J, Karch KR, Ball LE, Denu JM, Garcia BA. A Novel Quantitative Mass Spectrometry Platform for Determining Protein O-GlcNAcylation Dynamics. Mol Cell Proteomics 2016; 15:2462-75. [PMID: 27114449 DOI: 10.1074/mcp.o115.049627] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Indexed: 12/28/2022] Open
Abstract
Over the past decades, protein O-GlcNAcylation has been found to play a fundamental role in cell cycle control, metabolism, transcriptional regulation, and cellular signaling. Nevertheless, quantitative approaches to determine in vivo GlcNAc dynamics at a large-scale are still not readily available. Here, we have developed an approach to isotopically label O-GlcNAc modifications on proteins by producing (13)C-labeled UDP-GlcNAc from (13)C6-glucose via the hexosamine biosynthetic pathway. This metabolic labeling was combined with quantitative mass spectrometry-based proteomics to determine protein O-GlcNAcylation turnover rates. First, an efficient enrichment method for O-GlcNAc peptides was developed with the use of phenylboronic acid solid-phase extraction and anhydrous DMSO. The near stoichiometry reaction between the diol of GlcNAc and boronic acid dramatically improved the enrichment efficiency. Additionally, our kinetic model for turnover rates integrates both metabolomic and proteomic data, which increase the accuracy of the turnover rate estimation. Other advantages of this metabolic labeling method include in vivo application, direct labeling of the O-GlcNAc sites and higher confidence for site identification. Concentrating only on nuclear localized GlcNAc modified proteins, we are able to identify 105 O-GlcNAc peptides on 42 proteins and determine turnover rates of 20 O-GlcNAc peptides from 14 proteins extracted from HeLa nuclei. In general, we found O-GlcNAcylation turnover rates are slower than those published for phosphorylation or acetylation. Nevertheless, the rates widely varied depending on both the protein and the residue modified. We believe this methodology can be broadly applied to reveal turnovers/dynamics of protein O-GlcNAcylation from different biological states and will provide more information on the significance of O-GlcNAcylation, enabling us to study the temporal dynamics of this critical modification for the first time.
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Affiliation(s)
- Xiaoshi Wang
- From the ‡Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Zuo-Fei Yuan
- From the ‡Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Jing Fan
- §Department of Biomolecular Chemistry, University of Wisconsin, Madison, Wisconsin 53715
| | - Kelly R Karch
- From the ‡Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Lauren E Ball
- ¶Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - John M Denu
- §Department of Biomolecular Chemistry, University of Wisconsin, Madison, Wisconsin 53715
| | - Benjamin A Garcia
- From the ‡Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104;
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Ball LE, Leveritt MD. Development of a validated questionnaire to measure the self-perceived competence of primary health professionals in providing nutrition care to patients with chronic disease. Fam Pract 2015; 32:706-10. [PMID: 26415817 DOI: 10.1093/fampra/cmv073] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Nutrition is an important aspect of chronic disease prevention and management by primary health professionals, including GPs, dietitians, practice nurses, diabetes educators and exercise professionals. In order to better understand how to improve the delivery of nutrition care, it is important to have valid and reliable tools to measure self-perceived competence. OBJECTIVE This study aimed to develop a valid, structured, questionnaire that measures the self-perceived competence of primary health professionals to provide nutrition care to patients with chronic disease. METHODS The development of the questionnaire was carried out in four stages (1): preparation of scope and structure, through a literature review and consultation with an expert reference group (2); development of questionnaire items, which were refined through feedback from the reference group and 18 primary health professionals (3); investigation of internal consistency and concurrent validity through a pilot study on 118 primary health professionals (4) and investigation of test-retest reliability through a pilot study on 33 primary health professionals who completed the questionnaire twice, 2-3 weeks apart. RESULTS Stages 1 and 2 resulted in four constructs and 35 questions in the questionnaire. Stage 3 confirmed internal consistency, with Cronbach's α ranging from 0.88 to 0.98 for each construct and 0.98 for all items combined. Dietitians scored significantly higher than speech pathologists (P < 0.05) in each construct, confirming concurrent validity. Stage 4 confirmed test-retest reliability, with correlation coefficients ranging from 0.89 to 0.94 for each construct and 0.95 for all items combined. CONCLUSION The NUTrition COMPetence (NUTCOMP) questionnaire is a valid, reliable and suitable tool that can be used to directly inform professional development and identify opportunities to support safe and effective practice.
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Affiliation(s)
- Lauren E Ball
- Menzies Health Institute Queensland, Griffith University, Gold Coast and
| | - Michael D Leveritt
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD, Australia
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Pehar M, Ball LE, Sharma DR, Harlan BA, Comte-Walters S, Neely BA, Vargas MR. Changes in Protein Expression and Lysine Acetylation Induced by Decreased Glutathione Levels in Astrocytes. Mol Cell Proteomics 2015; 15:493-505. [PMID: 26486419 DOI: 10.1074/mcp.m115.049288] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Indexed: 01/13/2023] Open
Abstract
Astrocytes and neurons form a highly specialized functional unit, and the loss or gain of astrocytic functions can influence the initiation and progression of different neurodegenerative diseases. Neurons depend on the antioxidant protection provided by neighboring astrocytes. Glutathione (γ-l-glutamyl-l-cysteinyl-glycine) is a major component of the antioxidant system that defends cells against the toxic effects of reactive oxygen/nitrogen species. A decline in glutathione levels has been observed in aging and neurodegenerative diseases, and it aggravates the pathology in an amyotrophic lateral sclerosis-mouse model. Using a SILAC-based quantitative proteomic approach, we analyzed changes in global protein expression and lysine acetylation in primary astrocyte cultures obtained from wild-type mice or those deficient in the glutamate-cysteine ligase modifier subunit (GCLM). GCLM knockout astrocytes display an ∼80% reduction in total glutathione levels. We identified potential molecular targets and novel sites of acetylation that are affected by the chronic decrease in glutathione levels and observed a response mediated by Nrf2 activation. In addition, sequence analysis of peptides displaying increased acetylation in GCLM knockout astrocytes revealed an enrichment of cysteine residues in the vicinity of the acetylation site, which suggests potential crosstalk between lysine-acetylation and cysteine modification. Regulation of several metabolic and antioxidant pathways was observed at the level of protein expression and lysine acetylation, revealing a coordinated response involving transcriptional and posttranslational regulation.
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Affiliation(s)
- Mariana Pehar
- From the ¶Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425.
| | - Lauren E Ball
- From the ¶Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425
| | - Deep R Sharma
- From the ¶Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425
| | - Benjamin A Harlan
- From the ¶Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425
| | - Susana Comte-Walters
- From the ¶Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425
| | - Benjamin A Neely
- From the ¶Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425
| | - Marcelo R Vargas
- From the ¶Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425.
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Williams GR, Bethard JR, Berkaw MN, Nagel AK, Luttrell LM, Ball LE. Exploring G protein-coupled receptor signaling networks using SILAC-based phosphoproteomics. Methods 2015; 92:36-50. [PMID: 26160508 DOI: 10.1016/j.ymeth.2015.06.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 05/11/2015] [Revised: 06/29/2015] [Accepted: 06/30/2015] [Indexed: 12/21/2022] Open
Abstract
The type 1 parathyroid hormone receptor (PTH1R) is a key regulator of calcium homeostasis and bone turnover. Here, we employed SILAC-based quantitative mass spectrometry and bioinformatic pathways analysis to examine global changes in protein phosphorylation following short-term stimulation of endogenously expressed PTH1R in osteoblastic cells in vitro. Following 5min exposure to the conventional agonist, PTH(1-34), we detected significant changes in the phosphorylation of 224 distinct proteins. Kinase substrate motif enrichment demonstrated that consensus motifs for PKA and CAMK2 were the most heavily upregulated within the phosphoproteome, while consensus motifs for mitogen-activated protein kinases were strongly downregulated. Signaling pathways analysis identified ERK1/2 and AKT as important nodal kinases in the downstream network and revealed strong regulation of small GTPases involved in cytoskeletal rearrangement, cell motility, and focal adhesion complex signaling. Our data illustrate the utility of quantitative mass spectrometry in measuring dynamic changes in protein phosphorylation following GPCR activation.
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Affiliation(s)
- Grace R Williams
- Department of Molecular and Cellular Pharmacology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jennifer R Bethard
- Department of Molecular and Cellular Pharmacology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Mary N Berkaw
- Department of Molecular and Cellular Pharmacology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Alexis K Nagel
- Department of Molecular and Cellular Pharmacology, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Oral Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Louis M Luttrell
- Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA; Research Service of the Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC 29401, USA
| | - Lauren E Ball
- Department of Molecular and Cellular Pharmacology, Medical University of South Carolina, Charleston, SC 29425, USA; Department of Oral Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA.
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47
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Nagel AK, Ball LE. Intracellular protein O-GlcNAc modification integrates nutrient status with transcriptional and metabolic regulation. Adv Cancer Res 2015; 126:137-66. [PMID: 25727147 DOI: 10.1016/bs.acr.2014.12.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The inducible, nutrient-sensitive posttranslational modification of protein Ser/Thr residues with O-linked β-N-acetylglucosamine (O-GlcNAc) occurs on histones, transcriptional regulators, metabolic enzymes, oncogenes, tumor suppressors, and many critical intermediates of growth factor signaling. Cycling of O-GlcNAc modification on and off of protein substrates is catalyzed by the actions of O-GlcNAc transferase (OGT) and O-GlcNAcase (OGA), respectively. To date, there are less than 150 publications addressing the role of O-GlcNAc modification in cancer and over half were published in the last 2 years. These studies have clearly established that increased expression of OGT and hyper-O-GlcNAcylation is common to human cancers of breast, prostate, colon, lung, and pancreas. Furthermore, attenuating OGT activity reduces tumor growth in vitro and metastasis in vivo. This chapter discusses the structure and function of the O-GlcNAc cycling enzymes, mechanisms by which protein O-GlcNAc modification sense changes in nutrient status, the influence of O-GlcNAc cycling enzymes on glucose metabolism, and provides an overview of recent observations regarding the role of O-GlcNAcylation in cancer.
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Cotugno JD, Ferguson M, Harden H, Colquist S, Stack AA, Zimmerman JI, Russell AW, Ball LE, Hickman IJ. "I wish they could be in my shoes": patients' insights into tertiary health care for type 2 diabetes mellitus. Patient Prefer Adherence 2015; 9:1647-55. [PMID: 26604714 PMCID: PMC4655948 DOI: 10.2147/ppa.s91214] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Insightful accounts of patient experience within a health care system can be valuable for facilitating improvements in service delivery. OBJECTIVE The aim of this study was to explore patients' perceptions and experiences regarding a tertiary hospital Diabetes and Endocrinology outpatient service for the management of type 2 diabetes mellitus (T2DM). METHOD Nine patients participated in discovery interviews with an independent trained facilitator. Patients' stories were synthesized thematically using a constant comparative approach. RESULTS Three major themes were identified from the patients' stories: 1) understanding T2DM and diabetes management with subthemes highlighting that specialist care is highly valued by patients who experience a significant burden of diabetes on daily life and who may have low health literacy and low self confidence; 2) relationships with practitioners were viewed critical and perceived lack of empathy impacted the effectiveness of care; and 3) impact of health care systems on service delivery with lack of continuity of care relating to the tertiary hospital model and limitations with appointment bookings negatively impacting on patient experience. DISCUSSION The patients' stories suggest that the expectation of establishing a productive, ongoing relationship with practitioners is highly valued. Tertiary clinics for T2DM are well placed to incorporate novel technological approaches for monitoring and follow-up, which may overcome many of the perceived barriers of traditional service delivery. CONCLUSION Investing in strategies that promote patient-practitioner relationships may enhance effectiveness of treatment for T2DM by meeting patient expectations of personalized care. Future changes in service delivery would benefit from incorporating patients as key stakeholders in service evaluation.
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Affiliation(s)
- Jacqueline D Cotugno
- Department of Nutrition and Dietetics, Princess Alexandra Hospital, The University of Queensland, Brisbane, QLD, Australia
| | - Maree Ferguson
- Department of Nutrition and Dietetics, Princess Alexandra Hospital, The University of Queensland, Brisbane, QLD, Australia
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD, Australia
| | | | | | - Annabelle A Stack
- Department of Nutrition and Dietetics, Princess Alexandra Hospital, The University of Queensland, Brisbane, QLD, Australia
| | - Jane I Zimmerman
- Department of Diabetes & Endocrinology, Princess Alexandra Hospital, University of Queensland, Brisbane, QLD, Australia
| | - Anthony W Russell
- Department of Diabetes & Endocrinology, Princess Alexandra Hospital, University of Queensland, Brisbane, QLD, Australia
- School of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Lauren E Ball
- Menzies Health Institute Queensland, Griffith University, Brisbane, QLD, Australia
| | - Ingrid J Hickman
- Department of Nutrition and Dietetics, Princess Alexandra Hospital, The University of Queensland, Brisbane, QLD, Australia
- The Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
- Correspondence: Ingrid J Hickman, Department of Nutrition and Dietetics, Ground Floor, Building 15, Princess Alexandra Hospital, Ipswich Road, Woolloongabba, QLD 4102, Australia, Tel +61 7 3176 5588, Fax +61 7 3176 5619, Email
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Nagel AK, Ball LE. O-GlcNAc modification of the runt-related transcription factor 2 (Runx2) links osteogenesis and nutrient metabolism in bone marrow mesenchymal stem cells. Mol Cell Proteomics 2014; 13:3381-95. [PMID: 25187572 DOI: 10.1074/mcp.m114.040691] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Runx2 is the master switch controlling osteoblast differentiation and formation of the mineralized skeleton. The post-translational modification of Runx2 by phosphorylation, ubiquitinylation, and acetylation modulates its activity, stability, and interactions with transcriptional co-regulators and chromatin remodeling proteins downstream of osteogenic signals. Characterization of Runx2 by electron transfer dissociation tandem mass spectrometry revealed sites of O-linked N-acetylglucosamine (O-GlcNAc) modification, a nutrient-responsive post-translational modification that modulates the action of numerous transcriptional effectors. O-GlcNAc modification occurs in close proximity to phosphorylated residues and novel sites of arginine methylation within regions known to regulate Runx2 transactivation. An interaction between Runx2 and the O-GlcNAcylated, O-GlcNAc transferase enzyme was also detected. Pharmacological inhibition of O-GlcNAcase (OGA), the enzyme responsible for the removal of O-GlcNAc from Ser/Thr residues, enhanced basal (39.9%) and BMP2/7-induced (43.3%) Runx2 transcriptional activity in MC3T3-E1 pre-osteoblasts. In bone marrow-derived mesenchymal stem cells differentiated for 6 days in osteogenic media, inhibition of OGA resulted in elevated expression (24.3%) and activity (65.8%) of alkaline phosphatase (ALP) an early marker of bone formation and a transcriptional target of Runx2. Osteogenic differentiation of bone marrow-derived mesenchymal stem cells in the presence of BMP2/7 for 8 days culminated in decreased OGA activity (39.0%) and an increase in the abundance of O-GlcNAcylated Runx2, as compared with unstimulated cells. Furthermore, BMP2/7-induced ALP activity was enhanced by 35.6% in bone marrow-derived mesenchymal stem cells differentiated in the presence of the OGA inhibitor, demonstrating that direct or BMP2/7-induced inhibition of OGA is associated with increased ALP activity. Altogether, these findings link O-GlcNAc cycling to the Runx2-dependent regulation of the early ALP marker under osteoblast differentiation conditions.
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Affiliation(s)
- Alexis K Nagel
- From the ‡Department of Oral Health Sciences; Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina, 29425
| | - Lauren E Ball
- From the ‡Department of Oral Health Sciences; Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina, 29425
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50
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Robinson EL, Ball LE, Leveritt MD. Obesity bias among health and non-health students attending an Australian university and their perceived obesity education. J Nutr Educ Behav 2014; 46:390-5. [PMID: 24502966 DOI: 10.1016/j.jneb.2013.12.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 11/26/2013] [Accepted: 12/09/2013] [Indexed: 05/20/2023]
Abstract
OBJECTIVE This study compared the level of prejudice against obese individuals (obesity bias) among final-year health and non-health students, and associated obesity education. METHODS Cross-sectional online survey of 479 final-year students (292 health and 187 non-health) from Griffith University, Australia. Implicit and explicit obesity bias was measured using validated tools, and perceived obesity education ranked from "none" to "excellent." Data were analyzed quantitatively using analysis of variance and independent sample t tests. Statistical significance was set at P < .05. RESULTS Students' mean age was 26.2 ± 7.6 years and body mass index was 23.2 ± 4.7 kg/m(2). Health and non-health students exhibited significant levels of obesity bias. Non-health students were more likely to suggest that obese individuals lacked willpower (P = .03). Students' self-reported obesity education varied considerably. Those who reported a higher level of genetics-related obesity education were less likely to believe that obese individuals were "bad" (P = .002) or to show concern about putting on weight (P = .01). CONCLUSIONS AND IMPLICATIONS Obesity bias exists in health students in Australia and is similar to non-health students' obesity bias levels. Students' self-reported genetics-related obesity education may be associated with obesity bias. Modifications to existing health curricula should be considered to reduce obesity bias among future health professionals.
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Affiliation(s)
- Emma L Robinson
- School of Public Health, Griffith University, Queensland, Australia
| | - Lauren E Ball
- School of Public Health, Griffith University, Queensland, Australia.
| | - Michael D Leveritt
- School of Human Movement Studies, University of Queensland, Queensland, Australia
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