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Suzuki S, Geri JB, Knutson SD, Bell-Temin H, Tamura T, Fernández DF, Lovett GH, Till NA, Heller BL, Guo J, MacMillan DWC, Ploss A. Photochemical Identification of Auxiliary Severe Acute Respiratory Syndrome Coronavirus 2 Host Entry Factors Using μMap. J Am Chem Soc 2022; 144:16604-16611. [PMID: 36049228 PMCID: PMC9469761 DOI: 10.1021/jacs.2c06806] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 06/28/2022] [Indexed: 12/20/2022]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the infectious agent of the COVID-19 pandemic, remains a global medical problem. Angiotensin-converting enzyme 2 (ACE2) was identified as the primary viral entry receptor, and transmembrane serine protease 2 primes the spike protein for membrane fusion. However, ACE2 expression is generally low and variable across tissues, suggesting that auxiliary receptors facilitate viral entry. Identifying these factors is critical for understanding SARS-Cov-2 pathophysiology and developing new countermeasures. However, profiling host-virus interactomes involves extensive genetic screening or complex computational predictions. Here, we leverage the photocatalytic proximity labeling platform μMap to rapidly profile the spike interactome in human cells and identify eight novel candidate receptors. We systemically validate their functionality in SARS-CoV-2 pseudoviral uptake assays with both Wuhan and Delta spike variants and show that dual expression of ACE2 with either neuropilin-2, ephrin receptor A7, solute carrier family 6 member 15, or myelin and lymphocyte protein 2 significantly enhances viral uptake. Collectively, our data show that SARS-CoV-2 synergistically engages several host factors for cell entry and establishes μMap as a powerful tool for rapidly interrogating host-virus interactomes.
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Affiliation(s)
- Saori Suzuki
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Jacob B. Geri
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Steve D. Knutson
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | | | - Tomokazu Tamura
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | | | - Gabby H. Lovett
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Nicholas A. Till
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Brigitte L. Heller
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Jinchao Guo
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - David W. C. MacMillan
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
- Merck Center for Catalysis at Princeton University, Princeton, NJ 08544, USA
| | - Alexander Ploss
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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2
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Bell-Temin H, Yousefzadeh MJ, Bondarenko A, Quarles E, Jones-Laughner J, Robbins PD, Ladiges W, Niedernhofer LJ, Yates NA. Measuring biological age in mice using differential mass spectrometry. Aging (Albany NY) 2020; 11:1045-1061. [PMID: 30745468 PMCID: PMC6382423 DOI: 10.18632/aging.101810] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 01/14/2019] [Accepted: 01/29/2019] [Indexed: 12/11/2022]
Abstract
Aging is an ill-defined process that increases the risk of morbidity and mortality. Aging is also heterogeneous meaning that biological and chronological age can differ. Here, we used unbiased differential mass spectrometry to quantify thousands of proteins in mouse liver and select those that that consistently change in expression as mice age. A panel of 14 proteins from inbred C57BL/6 mice was used to equate chronological and biological age in this reference population, against which other mice could be compared. This “biological age calculator” identified two strains of f1 hybrid mice as biologically younger than inbred mice and progeroid mice as being biologically older. In an independent validation experiment, the calculator identified mice treated with rapamycin, known to extend lifespan of mice, as 18% younger than mice fed a placebo diet. This demonstrates that it is possible to measure subtle changes in biologic age in mammals using a proteomics approach.
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Affiliation(s)
- Harris Bell-Temin
- Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Matthew J Yousefzadeh
- Department of Molecular Medicine, The Scripps Research Institute, Florida , Jupiter, FL 33458, USA.,Department of Biochemistry, Molecular Biology and Biophysics, and the Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN 55455, USA
| | | | - Ellen Quarles
- Department of Pathology, University of Washington, Seattle, WA 98195, USA
| | - Jacqueline Jones-Laughner
- Biomedical Mass Spectrometry Center, University of Pittsburgh Schools of the Health Sciences, Pittsburgh, PA 15261, USA
| | - Paul D Robbins
- Department of Molecular Medicine, The Scripps Research Institute, Florida , Jupiter, FL 33458, USA.,Department of Biochemistry, Molecular Biology and Biophysics, and the Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN 55455, USA
| | - Warren Ladiges
- Department of Comparative Medicine, School of Medicine, University of Washington, Seattle, WA 98195, USA
| | - Laura J Niedernhofer
- Department of Molecular Medicine, The Scripps Research Institute, Florida , Jupiter, FL 33458, USA.,Department of Biochemistry, Molecular Biology and Biophysics, and the Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN 55455, USA
| | - Nathan A Yates
- Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.,Biomedical Mass Spectrometry Center, University of Pittsburgh Schools of the Health Sciences, Pittsburgh, PA 15261, USA
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3
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Robinson AR, Yousefzadeh MJ, Rozgaja TA, Wang J, Li X, Tilstra JS, Feldman CH, Gregg SQ, Johnson CH, Skoda EM, Frantz MC, Bell-Temin H, Pope-Varsalona H, Gurkar AU, Nasto LA, Robinson RAS, Fuhrmann-Stroissnigg H, Czerwinska J, McGowan SJ, Cantu-Medellin N, Harris JB, Maniar S, Ross MA, Trussoni CE, LaRusso NF, Cifuentes-Pagano E, Pagano PJ, Tudek B, Vo NV, Rigatti LH, Opresko PL, Stolz DB, Watkins SC, Burd CE, Croix CMS, Siuzdak G, Yates NA, Robbins PD, Wang Y, Wipf P, Kelley EE, Niedernhofer LJ. Spontaneous DNA damage to the nuclear genome promotes senescence, redox imbalance and aging. Redox Biol 2018; 17:259-273. [PMID: 29747066 PMCID: PMC6006678 DOI: 10.1016/j.redox.2018.04.007] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [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: 03/02/2018] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 11/20/2022] Open
Abstract
Accumulation of senescent cells over time contributes to aging and age-related diseases. However, what drives senescence in vivo is not clear. Here we used a genetic approach to determine if spontaneous nuclear DNA damage is sufficient to initiate senescence in mammals. Ercc1-/∆ mice with reduced expression of ERCC1-XPF endonuclease have impaired capacity to repair the nuclear genome. Ercc1-/∆ mice accumulated spontaneous, oxidative DNA damage more rapidly than wild-type (WT) mice. As a consequence, senescent cells accumulated more rapidly in Ercc1-/∆ mice compared to repair-competent animals. However, the levels of DNA damage and senescent cells in Ercc1-/∆ mice never exceeded that observed in old WT mice. Surprisingly, levels of reactive oxygen species (ROS) were increased in tissues of Ercc1-/∆ mice to an extent identical to naturally-aged WT mice. Increased enzymatic production of ROS and decreased antioxidants contributed to the elevation in oxidative stress in both Ercc1-/∆ and aged WT mice. Chronic treatment of Ercc1-/∆ mice with the mitochondrial-targeted radical scavenger XJB-5-131 attenuated oxidative DNA damage, senescence and age-related pathology. Our findings indicate that nuclear genotoxic stress arises, at least in part, due to mitochondrial-derived ROS, and this spontaneous DNA damage is sufficient to drive increased levels of ROS, cellular senescence, and the consequent age-related physiological decline.
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Affiliation(s)
- Andria R Robinson
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15261, USA; University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA 15232, USA; Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA
| | - Matthew J Yousefzadeh
- Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Tania A Rozgaja
- Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Jin Wang
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - Xuesen Li
- Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Jeremy S Tilstra
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA
| | - Chelsea H Feldman
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA 15232, USA
| | - Siobhán Q Gregg
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA 15232, USA; Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA; Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | | | - Erin M Skoda
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Marie-Céline Frantz
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Harris Bell-Temin
- Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Hannah Pope-Varsalona
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Aditi U Gurkar
- Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Luigi A Nasto
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15261, USA; Department of Paediatric Orthopaedics, G. Gaslini Children's Hospital, Genoa, Italy
| | - Renã A S Robinson
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Heike Fuhrmann-Stroissnigg
- Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Jolanta Czerwinska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Sara J McGowan
- Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | | | - Jamie B Harris
- Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Salony Maniar
- Center for Biologic Imaging, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Mark A Ross
- Center for Biologic Imaging, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Christy E Trussoni
- Division of Gastroenterology and Center for Cell Signaling in Gastroenterology, Mayo Clinic, Rochester, MN 55905, USA
| | - Nicholas F LaRusso
- Division of Gastroenterology and Center for Cell Signaling in Gastroenterology, Mayo Clinic, Rochester, MN 55905, USA
| | - Eugenia Cifuentes-Pagano
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Patrick J Pagano
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Barbara Tudek
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland; Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Nam V Vo
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Lora H Rigatti
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA 15232, USA
| | - Patricia L Opresko
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA 15232, USA; Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Donna B Stolz
- Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA; Center for Biologic Imaging, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Simon C Watkins
- Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA; Center for Biologic Imaging, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Christin E Burd
- Department of Molecular Genetics, Cancer Biology and Genetics, The Ohio State University, Columbus OH 43210 USA
| | - Claudette M St Croix
- Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA; Center for Biologic Imaging, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Gary Siuzdak
- The Scripps Research Institute California, La Jolla, CA 92037, USA
| | - Nathan A Yates
- Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA; Biomedical Mass Spectrometry Center, Schools of the Health Sciences University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Paul D Robbins
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA 15232, USA; Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA; Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA; Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Yinsheng Wang
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Eric E Kelley
- Department of Physiology & Pharmacology, West Virginia University, Morgantown, WV 26506, USA.
| | - Laura J Niedernhofer
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA 15232, USA; Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA; Department of Molecular Medicine and the Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA.
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4
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Flowers A, Bell-Temin H, Jalloh A, Stevens SM, Bickford PC. Proteomic anaysis of aged microglia: shifts in transcription, bioenergetics, and nutrient response. J Neuroinflammation 2017; 14:96. [PMID: 28468668 PMCID: PMC5415769 DOI: 10.1186/s12974-017-0840-7] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/14/2017] [Indexed: 01/01/2023] Open
Abstract
Background Age is the primary risk factor for many diseases. As such, age is a critical co-factor for examination in order to understand the progression and potential intervention in disease progression. Studies examining both the phenotype and transcriptome of aged microglia demonstrated a propensity for the development of a pro-inflammatory phenotype. Less well studied is the concomitant blunting of anti-inflammatory aspects of microglial function with age which also impact plasticity and repair in the CNS. Methods This study utilizes mass spectrometry-based proteomics to compare primary microglia from young and aged animals. Results This study revealed alterations in three clusters of inter-related proteins. The three pathways were inflammatory signaling, mitochondrial function, and cellular metabolism. Analysis of these clusters identified the protein rapamycin-insensitive companion of mTOR (RICTOR), a component of the mTORC2 complex, as a novel upstream regulator of several biological functions that are altered with age and potentially linked to phenotype development. A decrease in mTORC2-dependent AKT S473 phosphorylation, as assessed by insulin growth factor (IGF) treatment, was observed in aged microglia. This novel finding was confirmed by genetic manipulation of the microglial cell line. BV2 cells with diminished RICTOR displayed a phenotype that was strikingly similar to that of aged microglia. This finding is particularly relevant as the mTOR pathway already has a number of pharmacological modulators used clinically. Conclusions The results suggest that microglia from aged mice show changes in cellular metabolism and energy regulation that might underlie the alterations in inflammatory signaling. Modulation of one pathway identified in our bioinformatic analysis, RICTOR, may provide an avenue by which deleterious aspects of the aging microglia can be attenuated. If successful, this could mean potentially delaying or diminishing the progress of diseases for which progressive inflammation is involved. Electronic supplementary material The online version of this article (doi:10.1186/s12974-017-0840-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Antwoine Flowers
- Department of Neurosurgery and Brain Repair, USF Health Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd., Campus Box MDC-78, Tampa, FL, 33570, USA.,Department of Molecular Pharmacology and Physiology, USF Health Morsani College of Medicine, University of South Florida, Tampa, FL, USA
| | - Harris Bell-Temin
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Ahmad Jalloh
- Department of Neurosurgery and Brain Repair, USF Health Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd., Campus Box MDC-78, Tampa, FL, 33570, USA.,Department of Molecular Pharmacology and Physiology, USF Health Morsani College of Medicine, University of South Florida, Tampa, FL, USA
| | - Stanley M Stevens
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Paula C Bickford
- Department of Neurosurgery and Brain Repair, USF Health Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs Blvd., Campus Box MDC-78, Tampa, FL, 33570, USA. .,Department of Molecular Pharmacology and Physiology, USF Health Morsani College of Medicine, University of South Florida, Tampa, FL, USA. .,Research Service, James A Haley VA Hospital, Tampa, FL, USA.
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5
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Abstract
Stable isotope labeling by amino acids in cell culture (SILAC) is a versatile mass spectrometry-based proteomic approach that can achieve accurate relative protein quantitation on a global scale. In this approach, proteins are labeled while being synthesized by the cell due to the presence of certain amino acids exclusively as heavier mass analogs than their regular (light) counterparts. This differential labeling allows for the identification of heavy and light forms of each peptide corresponding to two or more different experimental groups upon mass spectrometric analysis, the intensities of which reflect their abundance in the sample analyzed. Relative quantitation is straightforward when SILAC labeling efficiency is high (>99%) and the same cell proteome is used as the quantitation reference, which is typically the case for immortalized cell lines. However, the SILAC methodology for the proteomic analysis of primary cells isolated after in vivo experimentation is more challenging given the low labeling efficiency that would be achieved post-isolation. Alternatively, a stable-isotope-labeled cell line representing the cell type can be used as an internal standard (spike-in SILAC); however, adequate representation of the primary cell proteome with the stable-isotope-labeled internal standard may limit overall protein quantitation, especially for cell types that exhibit a broad range of phenotypes such as microglia, the resident immune cells in the brain. Here, we present a way to circumvent this limitation by combining multiple phenotypes of a single-cell type (the immortalized mouse BV2 microglial cell line) into a single spike-in standard using primary mouse microglia as our model system. We describe the preparation of media, incorporation of labels, induction of four different activation states (plus resting), isolation of primary microglia from adult mice brains, preparation of lysates for analysis, and general guidelines for data processing.
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Affiliation(s)
- Joao Paulo Costa Pinho
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E Fowler Ave, ISA 2015, Tampa, FL, 33620, USA
| | - Harris Bell-Temin
- Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Bin Liu
- Department of Pharmacodynamics, University of Florida, 1345 Center Drive, Box 100487, Gainesville, FL, 32610, USA.
| | - Stanley M Stevens
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 E Fowler Ave, ISA 2015, Tampa, FL, 33620, USA.
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6
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Bell-Temin H, Culver-Cochran AE, Chaput D, Carlson CM, Kuehl M, Burkhardt BR, Bickford PC, Liu B, Stevens SM. Novel Molecular Insights into Classical and Alternative Activation States of Microglia as Revealed by Stable Isotope Labeling by Amino Acids in Cell Culture (SILAC)-based Proteomics. Mol Cell Proteomics 2015; 14:3173-84. [PMID: 26424600 PMCID: PMC4762627 DOI: 10.1074/mcp.m115.053926] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Indexed: 11/21/2022] Open
Abstract
Microglia, the resident immune cells of the brain, have been shown to display a complex spectrum of roles that span from neurotrophic to neurotoxic depending on their activation status. Microglia can be classified into four stages of activation, M1, which most closely matches the classical (pro-inflammatory) activation stage, and the alternative activation stages M2a, M2b, and M2c. The alternative activation stages have not yet been comprehensively analyzed through unbiased, global-scale protein expression profiling. In this study, BV2 mouse immortalized microglial cells were stimulated with agonists specific for each of the four stages and total protein expression for 4644 protein groups was quantified using SILAC-based proteomic analysis. After validating induction of the various stages through a targeted cytokine assay and Western blotting of activation states, the data revealed novel insights into the similarities and differences between the various states. The data identify several protein groups whose expression in the anti-inflammatory, pro-healing activation states are altered presumably to curtail inflammatory activation through differential protein expression, in the M2a state including CD74, LYN, SQST1, TLR2, and CD14. The differential expression of these proteins promotes healing, limits phagocytosis, and limits activation of reactive nitrogen species through toll-like receptor cascades. The M2c state appears to center around the down-regulation of a key member in the formation of actin-rich phagosomes, SLP-76. In addition, the proteomic data identified a novel activation marker, DAB2, which is involved in clathrin-mediated endocytosis and is significantly different between M2a and either M1 or M2b states. Western blot analysis of mouse primary microglia stimulated with the various agonists of the classical and alternative activation states revealed a similar trend of DAB2 expression compared with BV2 cells.
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Affiliation(s)
- Harris Bell-Temin
- From the ‡Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, Florida 33620
| | - Ashley E Culver-Cochran
- From the ‡Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, Florida 33620
| | - Dale Chaput
- From the ‡Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, Florida 33620
| | - Christina M Carlson
- From the ‡Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, Florida 33620
| | - Melanie Kuehl
- From the ‡Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, Florida 33620
| | - Brant R Burkhardt
- From the ‡Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, Florida 33620
| | - Paula C Bickford
- §James A. Haley VA Hospital, Research Service and Department of Neurosurgery and Brain Repair, University of South Florida, 12901 Bruce B. Downs Blvd, Tampa, Florida 33612
| | - Bin Liu
- ¶Department of Pharmacodynamics, University of Florida, 1345 Center Drive, Gainesville, Florida 32610
| | - Stanley M Stevens
- From the ‡Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, Florida 33620;
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7
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Krute CN, Bell-Temin H, Miller HK, Rivera FE, Weiss A, Stevens SM, Shaw LN. The membrane protein PrsS mimics σS in protecting Staphylococcus aureus against cell wall-targeting antibiotics and DNA-damaging agents. Microbiology (Reading) 2015; 161:1136-1148. [PMID: 25741016 DOI: 10.1099/mic.0.000065] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 03/02/2015] [Indexed: 01/10/2023]
Abstract
Staphylococcus aureus possesses a lone extracytoplasmic function (ECF) sigma factor, σ(S). In Bacillus subtilis, the ECF sigma factor, σ(W), is activated through a proteolytic cascade that begins with cleavage of the RsiW anti-sigma factor by a site-1 protease (S1P), PrsW. We have identified a PrsW homologue in S. aureus (termed PrsS) and explored its role in σ(S) regulation. Herein, we demonstrate that although a cognate σ(S) anti-sigma factor currently remains elusive, prsS phenocopies sigS in a wealth of regards. Specifically, prsS expression mimics the upregulation observed for sigS in response to DNA-damaging agents, cell wall-targeting antibiotics and during ex vivo growth in human serum and murine macrophages. prsS mutants also display the same sensitivities of sigS mutants to the DNA-damaging agents methyl methane sulfonate (MMS) and hydrogen peroxide, and the cell wall-targeting antibiotics ampicillin, bacitracin and penicillin-G. These phenotypes appear to be explained by alterations in abundance of proteins involved in drug resistance (Pbp2a, FemB, HmrA) and the response to DNA damage (BmrA, Hpt, Tag). Our findings seem to be mediated by putative proteolytic activity of PrsS, as site-directed mutagenesis of predicted catalytic residues fails to rescue the sensitivity of the mutant to H2O2 and MMS. Finally, a role for PrsS in S. aureus virulence was identified using human and murine models of infection. Collectively, our data indicate that PrsS and σ(S) function in a similar manner, and perhaps mediate virulence and resistance to DNA damage and cell wall-targeting antibiotics, via a common pathway.
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Affiliation(s)
- Christina N Krute
- Department of Cell Biology, Microbiology & Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Harris Bell-Temin
- Department of Cell Biology, Microbiology & Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Halie K Miller
- Department of Cell Biology, Microbiology & Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Frances E Rivera
- Department of Cell Biology, Microbiology & Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Andy Weiss
- Department of Cell Biology, Microbiology & Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Stanley M Stevens
- Department of Cell Biology, Microbiology & Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Lindsey N Shaw
- Department of Cell Biology, Microbiology & Molecular Biology, University of South Florida, Tampa, FL, USA
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8
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Robert-Cooperman CE, Dougan GC, Moak SL, Athanason MG, Kuehl MN, Bell-Temin H, Stevens SM, Burkhardt BR. PANDER transgenic mice display fasting hyperglycemia and hepatic insulin resistance. J Endocrinol 2014; 220:219-31. [PMID: 24468680 DOI: 10.1530/joe-13-0338] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PANcreatic-DERived factor (PANDER, FAM3B) is a novel protein that is highly expressed within the endocrine pancreas and to a lesser degree in other tissues. Under glucose stimulation, PANDER is co-secreted with insulin from the β-cell. Despite prior creation and characterization of acute hepatic PANDER animal models, the physiologic function remains to be elucidated from pancreas-secreted PANDER. To determine this, in this study, a transgenic mouse exclusively overexpressing PANDER from the endocrine pancreas was generated. PANDER was selectively expressed by the pancreatic-duodenal homeobox-1 (PDX1) promoter. The PANDER transgenic (PANTG) mice were metabolically and proteomically characterized to evaluate effects on glucose homeostasis, insulin sensitivity, and lipid metabolism. Fasting glucose, insulin and C-peptide levels were elevated in the PANTG compared with matched WT mice. Younger PANTG mice also displayed glucose intolerance in the absence of peripheral insulin sensitivity. Hyperinsulinemic-euglycemic clamp studies revealed that hepatic glucose production and insulin resistance were significantly increased in the PANTG with no difference in either glucose infusion rate or rate of disappearance. Fasting glucagon, corticosterones, resistin and leptin levels were also similar between PANTG and WT. Stable isotope labeling of amino acids in cell culture revealed increased gluconeogenic and lipogenic proteomic profiles within the liver of the PANTG with phosphoenol-pyruvate carboxykinase demonstrating a 3.5-fold increase in expression. This was matched with increased hepatic triglyceride content and decreased p-AMPK and p-acetyl coenzyme A carboxylase-1 signaling in the PANTG. Overall, our findings support a role of pancreatic β-cell-secreted PANDER in the regulation of hepatic insulin and lipogenenic signaling with subsequent impact on overall glycemia.
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Affiliation(s)
- Claudia E Robert-Cooperman
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, BSF 206, Tampa, Florida 33620, USA Department of Pediatrics, University of South Florida, 12901 Bruce B. Downs Boulevard, MDC 62, Tampa, Florida 33612, USA
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9
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Tsibris J, Stevens S, Seeley K, Bell-Temin H, Steffensen T, Paidas-Teefey C, Okuka M, Whiteman V, Spellacy W. 826: Membrane proteomic study of the VEGF receptor-2 network in the fetal compartment of human placentas near term. Am J Obstet Gynecol 2014. [DOI: 10.1016/j.ajog.2013.10.859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Chaput D, Kirouac LH, Bell-Temin H, Stevens SM, Padmanabhan J. SILAC-based proteomic analysis to investigate the impact of amyloid precursor protein expression in neuronal-like B103 cells. Electrophoresis 2013; 33:3728-37. [PMID: 23161580 DOI: 10.1002/elps.201200251] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 08/27/2012] [Accepted: 08/27/2012] [Indexed: 11/05/2022]
Abstract
Alzheimer's disease (AD) is the most prevalent form of dementia in the elderly. Amyloid plaque formation through aggregation of the amyloid beta peptide derived from amyloid precursor protein (APP) is considered one of the hallmark processes leading to AD pathology; however, the precise role of APP in plaque formation and AD pathogenesis is yet to be determined. Using stable isotope labeling by amino acids in cell culture (SILAC) and MS, protein expression profiles of APP null, rat neuronal-like B103 cells were compared to B103-695 cells that express the APP isoform, APP-695. A total of 2979 unique protein groups were identified among three biological replicates and significant protein expression changes were identified in a total of 102 nonredundant proteins. Some of the top biological functions associated with the differentially expressed proteins identified include cellular assembly, organization and morphology, cell cycle, lipid metabolism, protein folding, and PTMs. We report several novel biological pathways influenced by APP-695 expression in neuronal-like cells and provide additional framework for investigating altered molecular mechanisms associated with APP expression and processing and contribution to AD pathology.
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Affiliation(s)
- Dale Chaput
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA
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11
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Bell-Temin H, Zhang P, Chaput D, King MA, You M, Liu B, Stevens SM. Quantitative Proteomic Characterization of Ethanol-Responsive Pathways in Rat Microglial Cells. J Proteome Res 2013; 12:2067-77. [DOI: 10.1021/pr301038f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Harris Bell-Temin
- Department
of Cell Biology,
Microbiology, and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620,
United States
| | | | - Dale Chaput
- Department
of Cell Biology,
Microbiology, and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620,
United States
| | - Michael A. King
- Department of Veterans Affairs Medical Center, 1601 SW Archer Road, Gainesville,
Florida 32608, United States
| | - Min You
- Department of Molecular Pharmacology
and Physiology, University of South Florida, 12901 Bruce B. Downs Boulevard, Tampa, Florida 33612, United States
| | | | - Stanley M. Stevens
- Department
of Cell Biology,
Microbiology, and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620,
United States
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