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Tsutsui S, Terashima M, Nakamura O. A fungal-binding agglutinin in the skin slime of Japanese flounder (Paralichthys olivaceus) is glyceraldehyde 3-phosphate dehydrogenase. Microbiol Immunol 2024. [PMID: 38923675 DOI: 10.1111/1348-0421.13163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/06/2024] [Accepted: 06/12/2024] [Indexed: 06/28/2024]
Abstract
Agglutination of pathogenic microorganisms on the body surface is a significant phenomenon for the prevention of infection. In the present study, we show that an extract of the skin mucus from Japanese flounder (Paralichthys olivaceus) has agglutination activity against the yeast Saccharomyces cerevisiae. We purified this yeast-binding protein, which consists of an approximately 35-kDa homodimer, using affinity chromatography with yeast as a ligand. Multiple internal amino acid sequences of the protein, as determined using liquid chromatography with quadrupole time-of-flight tandem mass spectrometry, mapped to flounder glyceraldehyde 3-phosphate dehydrogenase (GAPDH). An anti-GAPDH antibody inhibited the yeast agglutination activity in the skin mucus extract and stained agglutinated yeast, indicating that flounder GAPDH could agglutinate yeast. The current study suggests that GAPDH, a well-known protein as the sixth enzyme in the glycolytic pathway, is a significant player in mucosal immunity in teleosts.
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Affiliation(s)
- Shigeyuki Tsutsui
- Laboratory of Fish Pathology, Department of Marine Biosciences, School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Mizuki Terashima
- Laboratory of Fish Pathology, Department of Marine Biosciences, School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Osamu Nakamura
- Laboratory of Fish Pathology, Department of Marine Biosciences, School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa, Japan
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2
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Ramezani R, Mohammadian M, Hosseini ES, Zare M. The effect of bovine milk lactoferrin-loaded exosomes (exoLF) on human MDA-MB-231 breast cancer cell line. BMC Complement Med Ther 2023; 23:228. [PMID: 37422619 DOI: 10.1186/s12906-023-04045-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 06/18/2023] [Indexed: 07/10/2023] Open
Abstract
BACKGROUND Cancer is still the most challenging disease and is responsible for many deaths worldwide. Considerable research now focuses on targeted therapy in cancer using natural components to improve anti-tumor efficacy and reduce unfavorable effects. Lactoferrin is an iron-binding glycoprotein found in body fluids. Increasing evidence suggests that lactoferrin is a safe agent capable of inducing anti-cancer effects. Therefore, we conducted a study to evaluate the effects of the exosomal form of bovine milk lactoferrin on a human MDA-MB-231 breast cancer cell line. METHODS The exosomes were isolated from cancer cells by ultracentrifugation and incorporated with bovine milk lactoferrin through the incubation method. The average size of the purified exosome was determined using SEM imaging and DLS analysis. The maximum percentage of lactoferrin-loaded exosomes (exoLF) was achieved by incubating 1 mg/ml of lactoferrin with 30 µg/ml of MDA-MB-231 cells-derived exosomes. Following treatment of MDA-MB-231 cancer cells and normal cells with 1 mg/ml exoLF MTT assay applied to evaluate the cytotoxicity, PI/ annexin V analysis was carried out to illustrate the apoptotic phenotype, and the real-time PCR was performed to assess the pro-apoptotic protein, Bid, and anti-apoptotic protein, Bcl-2. RESULTS The average size of the purified exosome was about 100 nm. The maximum lactoferrin loading efficiency of exoLF was 29.72%. MTT assay showed that although the 1 mg/ml exoLF treatment of MDA-MB-231 cancer cells induced 50% cell growth inhibition, normal mesenchymal stem cells remained viable. PI/ annexin V analysis revealed that 34% of cancer cells had late apoptotic phenotype after treatment. The real-time PCR showed an elevated expression of pro-apoptotic protein Bid and diminished anti-apoptotic protein Bcl-2 following exoLF treatment. CONCLUSION These results suggested that exoLF could induce selective cytotoxicity against cancer cells compared to normal cells. Incorporating lactoferrin into the exosome seems an effective agent for cancer therapy. However, further studies are required to evaluate anti-tumor efficacy and the underlying mechanism of exoLF in various cancer cell lines and animal models.
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Affiliation(s)
- Reihaneh Ramezani
- Department of Family Therapy, Women Research Center, Alzahra University, Tehran, Iran.
| | - Mozhdeh Mohammadian
- Department of Hematology and Cell Therapy, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Elaheh Sadat Hosseini
- Department of Genetics, Faculty of Life Sciences, Tehran North Branch, Islamic Azad University, Tehran, Iran
| | - Mehrak Zare
- Skin and Stem Cell Research Center, Tehran University of Medical Sciences, Tehran, Iran
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3
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Zhao M, Zhao W, Li L. Proteomics-based mechanistic study of sub-lethally injured Saccharomyces cerevisiae by pulsed electric fields. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Spanò DP, Bonelli S, Calligaris M, Carreca AP, Carcione C, Zito G, Nicosia A, Rizzo S, Scilabra SD. High-Resolution Secretome Analysis of Chemical Hypoxia Treated Cells Identifies Putative Biomarkers of Chondrosarcoma. Proteomes 2022; 10:proteomes10030025. [PMID: 35893766 PMCID: PMC9326515 DOI: 10.3390/proteomes10030025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/08/2022] [Accepted: 07/10/2022] [Indexed: 11/16/2022] Open
Abstract
Chondrosarcoma is the second most common bone tumor, accounting for 20% of all cases. Little is known about the pathology and molecular mechanisms involved in the development and in the metastatic process of chondrosarcoma. As a consequence, there are no approved therapies for this tumor and surgical resection is the only treatment currently available. Moreover, there are no available biomarkers for this type of tumor, and chondrosarcoma classification relies on operator-dependent histopathological assessment. Reliable biomarkers of chondrosarcoma are urgently needed, as well as greater understanding of the molecular mechanisms of its development for translational purposes. Hypoxia is a central feature of chondrosarcoma progression. The hypoxic tumor microenvironment of chondrosarcoma triggers a number of cellular events, culminating in increased invasiveness and migratory capability. Herein, we analyzed the effects of chemically-induced hypoxia on the secretome of SW 1353, a human chondrosarcoma cell line, using high-resolution quantitative proteomics. We found that hypoxia induced unconventional protein secretion and the release of proteins associated to exosomes. Among these proteins, which may be used to monitor chondrosarcoma development, we validated the increased secretion in response to hypoxia of glyceraldehyde 3-phosphate dehydrogenase (GAPDH), a glycolytic enzyme well-known for its different functional roles in a wide range of tumors. In conclusion, by analyzing the changes induced by hypoxia in the secretome of chondrosarcoma cells, we identified molecular mechanisms that can play a role in chondrosarcoma progression and pinpointed proteins, including GAPDH, that may be developed as potential biomarkers for the diagnosis and therapeutic management of chondrosarcoma.
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Affiliation(s)
- Donatella Pia Spanò
- Proteomics Group of Fondazione Ri.MED, Department of Research IRCCS ISMETT, via Ernesto Tricomi 5, 90145 Palermo, Italy; (D.P.S.); (S.B.); (M.C.); (A.P.C.)
- STEBICEF (Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche), Università degli Studi di Palermo, Viale delle Scienze Ed. 16, 90128 Palermo, Italy
| | - Simone Bonelli
- Proteomics Group of Fondazione Ri.MED, Department of Research IRCCS ISMETT, via Ernesto Tricomi 5, 90145 Palermo, Italy; (D.P.S.); (S.B.); (M.C.); (A.P.C.)
- STEBICEF (Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche), Università degli Studi di Palermo, Viale delle Scienze Ed. 16, 90128 Palermo, Italy
| | - Matteo Calligaris
- Proteomics Group of Fondazione Ri.MED, Department of Research IRCCS ISMETT, via Ernesto Tricomi 5, 90145 Palermo, Italy; (D.P.S.); (S.B.); (M.C.); (A.P.C.)
- Department of Pharmacy, University of Pisa, Via Bonanno 6, 56126 Pisa, Italy
| | - Anna Paola Carreca
- Proteomics Group of Fondazione Ri.MED, Department of Research IRCCS ISMETT, via Ernesto Tricomi 5, 90145 Palermo, Italy; (D.P.S.); (S.B.); (M.C.); (A.P.C.)
| | - Claudia Carcione
- Fondazione Ri.MED, Department of Research IRCCS ISMETT, via Ernesto Tricomi 5, 90145 Palermo, Italy;
| | - Giovanni Zito
- Research Department, IRCSS ISMETT (Instituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione), 90127 Palermo, Italy;
| | - Aldo Nicosia
- Institute for Biomedical Research and Innovation-National Research Council (IRIB-CNR), Via Ugo La Malfa 153, 90146 Palermo, Italy;
| | - Sergio Rizzo
- Medical Oncology Unit, IRCCS ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione), 90127 Palermo, Italy;
| | - Simone Dario Scilabra
- Proteomics Group of Fondazione Ri.MED, Department of Research IRCCS ISMETT, via Ernesto Tricomi 5, 90145 Palermo, Italy; (D.P.S.); (S.B.); (M.C.); (A.P.C.)
- Correspondence:
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Rahman MM, Lendel C. Extracellular protein components of amyloid plaques and their roles in Alzheimer's disease pathology. Mol Neurodegener 2021; 16:59. [PMID: 34454574 PMCID: PMC8400902 DOI: 10.1186/s13024-021-00465-0] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 06/11/2021] [Indexed: 12/20/2022] Open
Abstract
Alzheimer's disease (AD) is pathologically defined by the presence of fibrillar amyloid β (Aβ) peptide in extracellular senile plaques and tau filaments in intracellular neurofibrillary tangles. Extensive research has focused on understanding the assembly mechanisms and neurotoxic effects of Aβ during the last decades but still we only have a brief understanding of the disease associated biological processes. This review highlights the many other constituents that, beside Aβ, are accumulated in the plaques, with the focus on extracellular proteins. All living organisms rely on a delicate network of protein functionality. Deposition of significant amounts of certain proteins in insoluble inclusions will unquestionably lead to disturbances in the network, which may contribute to AD and copathology. This paper provide a comprehensive overview of extracellular proteins that have been shown to interact with Aβ and a discussion of their potential roles in AD pathology. Methods that can expand the knowledge about how the proteins are incorporated in plaques are described. Top-down methods to analyze post-mortem tissue and bottom-up approaches with the potential to provide molecular insights on the organization of plaque-like particles are compared. Finally, a network analysis of Aβ-interacting partners with enriched functional and structural key words is presented.
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Affiliation(s)
- M Mahafuzur Rahman
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.
| | - Christofer Lendel
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.
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Li FJ, Surolia R, Li H, Wang Z, Liu G, Kulkarni T, Massicano AVF, Mobley JA, Mondal S, de Andrade JA, Coonrod SA, Thompson PR, Wille K, Lapi SE, Athar M, Thannickal VJ, Carter AB, Antony VB. Citrullinated vimentin mediates development and progression of lung fibrosis. Sci Transl Med 2021; 13:13/585/eaba2927. [PMID: 33731433 DOI: 10.1126/scitranslmed.aba2927] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 07/06/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022]
Abstract
The mechanisms by which environmental exposures contribute to the pathogenesis of lung fibrosis are unclear. Here, we demonstrate an increase in cadmium (Cd) and carbon black (CB), common components of cigarette smoke (CS) and environmental particulate matter (PM), in lung tissue from subjects with idiopathic pulmonary fibrosis (IPF). Cd concentrations were directly proportional to citrullinated vimentin (Cit-Vim) amounts in lung tissue of subjects with IPF. Cit-Vim amounts were higher in subjects with IPF, especially smokers, which correlated with lung function and were associated with disease manifestations. Cd/CB induced the secretion of Cit-Vim in an Akt1- and peptidylarginine deiminase 2 (PAD2)-dependent manner. Cit-Vim mediated fibroblast invasion in a 3D ex vivo model of human pulmospheres that resulted in higher expression of CD26, collagen, and α-SMA. Cit-Vim activated NF-κB in a TLR4-dependent fashion and induced the production of active TGF-β1, CTGF, and IL-8 along with higher surface expression of TLR4 in lung fibroblasts. To corroborate ex vivo findings, mice treated with Cit-Vim, but not Vim, independently developed a similar pattern of fibrotic tissue remodeling, which was TLR4 dependent. Moreover, wild-type mice, but not PAD2-/- and TLR4 mutant (MUT) mice, exposed to Cd/CB generated high amounts of Cit-Vim, in both plasma and bronchoalveolar lavage fluid, and developed lung fibrosis in a stereotypic manner. Together, these studies support a role for Cit-Vim as a damage-associated molecular pattern molecule (DAMP) that is generated by lung macrophages in response to environmental Cd/CB exposure. Furthermore, PAD2 might represent a promising target to attenuate Cd/CB-induced fibrosis.
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Affiliation(s)
- Fu Jun Li
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Ranu Surolia
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Huashi Li
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Zheng Wang
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Gang Liu
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Tejaswini Kulkarni
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Adriana V F Massicano
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | - James A Mobley
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Santanu Mondal
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Joao A de Andrade
- Vanderbilt Lung Institute, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37212, USA
| | - Scott A Coonrod
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Paul R Thompson
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Keith Wille
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Suzanne E Lapi
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | - Mohammad Athar
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Victor J Thannickal
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA.,Birmingham VA Medical Center, Birmingham, AL 35294, USA
| | - A Brent Carter
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA.,Birmingham VA Medical Center, Birmingham, AL 35294, USA
| | - Veena B Antony
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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Iwamoto A, Inoue Y, Tachibana H, Kawahara H. Immunomodulatory effect of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) in allergic conditions in vitro and in vivo. Cytotechnology 2021; 73:333-342. [PMID: 34149169 PMCID: PMC8166990 DOI: 10.1007/s10616-020-00438-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 11/04/2020] [Indexed: 12/14/2022] Open
Abstract
We found that strawberry extract suppressed immunoglobulin (Ig) E production in vitro and in vivo, and identified glyceraldehyde-3-phosphate dehydrogenase (GAPDH) as one of the IgE suppressor in the extract. We report here the effect of GAPDH on various Ig productions in vitro and in vivo. GAPDH suppressed IgE and enhanced IgA, IgG and IgM productions in ovalbumin (OVA)-stimulated human peripheral blood mononuclear cells. Oral administration of GAPDH at 10 mg/kg/day to OVA-induced allergy model mice tended to decrease total IgE level and increase total IgA and IgG levels in sera, and also decreased OVA-specific IgE and IgG levels. It is known that the increase of total IgA as well as the decrease of total and specific IgE is important for alleviating allergic symptoms. In addition, GAPDH accelerated IgA production and increased some cytokine secretions such as IL-4, TGF-β1 and IFN-γ in the OVA-immunized mice spleen lymphocytes. These cytokines involved in the class-switching, IgA enhancement, and IgE suppression, respectively, supporting above results. Our study suggests a possibility that oral administration of GAPDH may induce the immunomodulation in allergic responses.
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Affiliation(s)
- Akira Iwamoto
- Division of Applied Biological Chemistry, Department of Bioscience and Biochemistry, Faculty of Agriculture, Kyushu University, 744 Motooka Nishi-ku, Fukuoka, 819-0395 Japan
| | - Yuichi Inoue
- Department of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shii, Kokuraminami-ku, Kitakyushu, Fukuoka, 802-0985 Japan
| | - Hirofumi Tachibana
- Division of Applied Biological Chemistry, Department of Bioscience and Biochemistry, Faculty of Agriculture, Kyushu University, 744 Motooka Nishi-ku, Fukuoka, 819-0395 Japan
| | - Hiroharu Kawahara
- Department of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shii, Kokuraminami-ku, Kitakyushu, Fukuoka, 802-0985 Japan
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Park SS, Gonzalez-Juarbe N, Martínez E, Hale JY, Lin YH, Huffines JT, Kruckow KL, Briles DE, Orihuela CJ. Streptococcus pneumoniae Binds to Host Lactate Dehydrogenase via PspA and PspC To Enhance Virulence. mBio 2021; 12:e00673-21. [PMID: 33947761 PMCID: PMC8437407 DOI: 10.1128/mbio.00673-21] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 03/22/2021] [Indexed: 02/06/2023] Open
Abstract
Pneumococcal surface protein A (PspA) and pneumococcal surface protein C (PspC, also called CbpA) are major virulence factors of Streptococcus pneumoniae (Spn). These surface-exposed choline-binding proteins (CBPs) function independently to inhibit opsonization, neutralize antimicrobial factors, or serve as adhesins. PspA and PspC both carry a proline-rich domain (PRD) whose role, other than serving as a flexible connector between the N-terminal and C-terminal domains, was up to this point unknown. Herein, we demonstrate that PspA binds to lactate dehydrogenase (LDH) released from dying host cells during infection. Using recombinant versions of PspA and isogenic mutants lacking PspA or specific domains of PspA, this property was mapped to a conserved 22-amino-acid nonproline block (NPB) found within the PRD of most PspAs and PspCs. The NPB of PspA had specific affinity for LDH-A, which converts pyruvate to lactate. In a mouse model of pneumonia, preincubation of Spn carrying NPB-bearing PspA with LDH-A resulted in increased bacterial titers in the lungs. In contrast, incubation of Spn carrying a version of PspA lacking the NPB with LDH-A or incubation of wild-type Spn with enzymatically inactive LDH-A did not enhance virulence. Preincubation of NPB-bearing Spn with lactate alone enhanced virulence in a pneumonia model, indicating exogenous lactate production by Spn-bound LDH-A had an important role in pneumococcal pathogenesis. Our observations show that lung LDH, released during the infection, is an important binding target for Spn via PspA/PspC and that pneumococci utilize LDH-A derived lactate for their benefit in vivoIMPORTANCEStreptococcus pneumoniae (Spn) is the leading cause of community-acquired pneumonia. PspA and PspC are among its most important virulence factors, and these surface proteins carry the proline-rich domain (PRD), whose role was unknown until now. Herein, we show that a conserved 22-amino-acid nonproline block (NPB) found within most versions of the PRD binds to host-derived lactate dehydrogenase A (LDH-A), a metabolic enzyme which converts pyruvate to lactate. PspA-mediated binding of LDH-A increased Spn titers in the lungs and this required LDH-A enzymatic activity. Enhanced virulence was also observed when Spn was preincubated with lactate, suggesting LDH-A-derived lactate is a vital food source. Our findings define a role for the NPB of the PRD and show that Spn co-opts host enzymes for its benefit. They advance our understanding of pneumococcal pathogenesis and have key implications on the susceptibility of individuals with preexisting airway damage that results in LDH-A release.
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Affiliation(s)
- Sang-Sang Park
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Norberto Gonzalez-Juarbe
- Infectious Diseases and Genomic Medicine Group, J Craig Venter Institute, Rockville, Maryland, USA
| | - Eriel Martínez
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Joanetha Yvette Hale
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Yi-Han Lin
- Infectious Diseases and Genomic Medicine Group, J Craig Venter Institute, Rockville, Maryland, USA
| | - Joshua T Huffines
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Katherine L Kruckow
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - David E Briles
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Carlos J Orihuela
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
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Naghiyan Fesharaki S, Naghiyan Fesharaki S, Esmaeili A, Azadeh M, Ghaedi K. SNP rs1803622 in hsa-miR-548g binding site at GAPDH alters susceptibility to breast cancer. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Cohen MJ, Chirico WJ, Lipke PN. Through the back door: Unconventional protein secretion. Cell Surf 2020; 6:100045. [PMID: 33225116 PMCID: PMC7666356 DOI: 10.1016/j.tcsw.2020.100045] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 09/08/2020] [Accepted: 09/08/2020] [Indexed: 12/19/2022] Open
Abstract
Proteins are secreted from eukaryotic cells by several mechanisms besides the well-characterized classical secretory system. Proteins destined to enter the classical secretory system contain a signal peptide for translocation into the endoplasmic reticulum. However, many proteins lacking a signal peptide are secreted nonetheless. Contrary to conventional belief, these proteins are not just released as a result of membrane damage leading to cell leakage, but are actively packaged for secretion in alternative pathways. They are called unconventionally secreted proteins, and the best-characterized are from fungi and mammals. These proteins have extracellular functions including cell signaling, immune modulation, as well as moonlighting activities different from their well-described intracellular functions. Among the pathways for unconventional secretion are direct transfer across the plasma membrane, release within plasma membrane-derived microvesicles, use of elements of autophagy, or secretion from endosomal/multivesicular body-related components. We review the fungal and metazoan unconventional secretory pathways and their regulation, and propose experimental criteria to identify their mode of secretion.
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Affiliation(s)
- Michael J. Cohen
- The Graduate Center of the City University of New York, United States
- Biology Department, Brooklyn College of the City University of New York, United States
| | - William J. Chirico
- Department of Cell Biology, Molecular and Cellular Biology Program, SUNY Downstate Medical Center, United States
| | - Peter N. Lipke
- The Graduate Center of the City University of New York, United States
- Biology Department, Brooklyn College of the City University of New York, United States
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Wang C, Zhang S, Liu J, Tian Y, Ma B, Xu S, Fu Y, Luo Y. Secreted Pyruvate Kinase M2 Promotes Lung Cancer Metastasis through Activating the Integrin Beta1/FAK Signaling Pathway. Cell Rep 2020; 30:1780-1797.e6. [PMID: 32049010 DOI: 10.1016/j.celrep.2020.01.037] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 12/01/2019] [Accepted: 01/10/2020] [Indexed: 12/31/2022] Open
Abstract
Cancer cell-derived secretomes have been documented to play critical roles in cancer progression. Intriguingly, alternative extracellular roles of intracellular proteins are involved in various steps of tumor progression, which can offer strategies to fight cancer. Herein, we identify lung cancer progression-associated secretome signatures using mass spectrometry analysis. Among them, PKM2 is verified to be highly expressed and secreted in lung cancer cells and clinical samples. Functional analyses demonstrates that secreted PKM2 facilitates tumor metastasis. Furthermore, mass spectrometry analysis and functional validation identify integrin β1 as a receptor of secreted PKM2. Mechanistically, secreted PKM2 directly bound to integrin β1 and subsequently activated the FAK/SRC/ERK axis to promote tumor metastasis. Collectively, our findings suggest that PKM2 is a potential serum biomarker for diagnosing lung cancer and that targeting the secreted PKM2-integrin β1 axis can inhibit lung cancer development, which provides evidence of a potential therapeutic strategy in lung cancer.
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Affiliation(s)
- Caihong Wang
- Cancer Biology Laboratory, School of Life Sciences, Tsinghua University, Beijing 100084, China; The National Engineering Laboratory for Anti-Tumor Protein Therapeutics, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory for Protein Therapeutics, Tsinghua University, Beijing 100084, China
| | - Shaosen Zhang
- Cancer Biology Laboratory, School of Life Sciences, Tsinghua University, Beijing 100084, China; The National Engineering Laboratory for Anti-Tumor Protein Therapeutics, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory for Protein Therapeutics, Tsinghua University, Beijing 100084, China
| | - Jie Liu
- Cancer Biology Laboratory, School of Life Sciences, Tsinghua University, Beijing 100084, China; The National Engineering Laboratory for Anti-Tumor Protein Therapeutics, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory for Protein Therapeutics, Tsinghua University, Beijing 100084, China
| | - Yang Tian
- Cancer Biology Laboratory, School of Life Sciences, Tsinghua University, Beijing 100084, China; The National Engineering Laboratory for Anti-Tumor Protein Therapeutics, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory for Protein Therapeutics, Tsinghua University, Beijing 100084, China
| | - Boyuan Ma
- Cancer Biology Laboratory, School of Life Sciences, Tsinghua University, Beijing 100084, China; The National Engineering Laboratory for Anti-Tumor Protein Therapeutics, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory for Protein Therapeutics, Tsinghua University, Beijing 100084, China
| | - Siran Xu
- Cancer Biology Laboratory, School of Life Sciences, Tsinghua University, Beijing 100084, China; The National Engineering Laboratory for Anti-Tumor Protein Therapeutics, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory for Protein Therapeutics, Tsinghua University, Beijing 100084, China
| | - Yan Fu
- Cancer Biology Laboratory, School of Life Sciences, Tsinghua University, Beijing 100084, China; The National Engineering Laboratory for Anti-Tumor Protein Therapeutics, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory for Protein Therapeutics, Tsinghua University, Beijing 100084, China
| | - Yongzhang Luo
- Cancer Biology Laboratory, School of Life Sciences, Tsinghua University, Beijing 100084, China; The National Engineering Laboratory for Anti-Tumor Protein Therapeutics, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory for Protein Therapeutics, Tsinghua University, Beijing 100084, China.
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12
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Chauhan AS, Kumar M, Chaudhary S, Dhiman A, Patidar A, Jakhar P, Jaswal P, Sharma K, Sheokand N, Malhotra H, Raje CI, Raje M. Trafficking of a multifunctional protein by endosomal microautophagy: linking two independent unconventional secretory pathways. FASEB J 2019; 33:5626-5640. [PMID: 30640524 DOI: 10.1096/fj.201802102r] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
During physiologic stresses, like micronutrient starvation, infection, and cancer, the cytosolic moonlighting protein glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is trafficked to the plasma membrane (PM) and extracellular milieu (ECM). Our work demonstrates that GAPDH mobilized to the PM, and the ECM does not utilize the classic endoplasmic reticulum-Golgi route of secretion; instead, it is first selectively translocated into early and late endosomes from the cytosol via microautophagy. GAPDH recruited to this common entry point is subsequently delivered into multivesicular bodies, leading to its membrane trafficking through secretion via exosomes and secretory lysosomes. We present evidence that both pathways of GAPDH membrane trafficking are up-regulated upon iron starvation, potentially by mobilization of intracellular calcium. These pathways also play a role in clearance of misfolded intracellular polypeptide aggregates. Our findings suggest that cells build in redundancy for vital cellular pathways to maintain micronutrient homeostasis and prevent buildup of toxic intracellular misfolded protein refuse.-Chauhan, A. S., Kumar, M., Chaudhary, S., Dhiman, A., Patidar, A., Jakhar, P., Jaswal, P., Sharma, K., Sheokand, N., Malhotra, H., Raje, C. I., Raje. M. Trafficking of a multifunctional protein by endosomal microautophagy: linking two independent unconventional secretory pathways.
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Affiliation(s)
- Anoop Singh Chauhan
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Manoj Kumar
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Surbhi Chaudhary
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Asmita Dhiman
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Anil Patidar
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Priyanka Jakhar
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Pallavi Jaswal
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Kapil Sharma
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Navdeep Sheokand
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Himanshu Malhotra
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | | | - Manoj Raje
- Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
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13
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Nakano T, Goto S, Takaoka Y, Tseng HP, Fujimura T, Kawamoto S, Ono K, Chen CL. A novel moonlight function of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) for immunomodulation. Biofactors 2018; 44:597-608. [PMID: 28753256 DOI: 10.1002/biof.1379] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 05/25/2017] [Accepted: 06/22/2017] [Indexed: 11/09/2022]
Abstract
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is an energy metabolism-related enzyme, which generates NADH in glycolysis. Our previous study revealed a novel role of exogenous GAPDH in the amelioration of lipopolysaccharide (LPS)-induced sepsis-related, severe acute lung injury (ALI) in mice. Here, we show the effect of extracellular GAPDH on the physiological functions of macrophages, which play an important role in the onset of sepsis and ALI. GAPDH has no effect on cell viability, while it strongly suppressed cell adhesion, spreading, and phagocytic function of LPS-stimulated macrophages. GAPDH treatment significantly reduced tumor necrosis factor (TNF)-α, while it induced interleukin (IL)-10 production from LPS-stimulated macrophages in a dose-dependent manner. It is noteworthy that heat inactivation of GAPDH lost its immunomodulatory activity. Correspondingly, NADH significantly inhibited TNF-α and enhanced IL-10 production with elevation of both M1/M2 macrophage markers. These data suggest that extracellular GAPDH induces intermediate M1/M2 macrophages for termination of inflammation, partly through its enzyme activity for generation of NADH. © 2018 BioFactors, 44(6):597-608, 2018.
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Affiliation(s)
- Toshiaki Nakano
- Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, 123 Ta-Pei Rd, Niao-Sung, Kaohsiung 833, Taiwan
- Liver Transplantation Center and Department of Surgery, Division of Transplant Immunology, Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, 123 Ta-Pei Rd, Niao-Sung, Kaohsiung 833, Taiwan
| | - Shigeru Goto
- Liver Transplantation Center and Department of Surgery, Division of Transplant Immunology, Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, 123 Ta-Pei Rd, Niao-Sung, Kaohsiung 833, Taiwan
- Nobeoka Medical Check Center, Fukuoka Institution of Occupational Health, 2-1-5 Atagomachi, Nobeoka, Miyazaki 882-0872, Japan
- Basic Medical Science of Nursing, Faculty of Nursing, Department of Nursing, Josai International University, 1 Gumyo, Togane, Chiba 283-8555, Japan
| | - Yuki Takaoka
- Liver Transplantation Center and Department of Surgery, Division of Transplant Immunology, Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, 123 Ta-Pei Rd, Niao-Sung, Kaohsiung 833, Taiwan
| | - Hui-Peng Tseng
- Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, 123 Ta-Pei Rd, Niao-Sung, Kaohsiung 833, Taiwan
- Liver Transplantation Center and Department of Surgery, Division of Transplant Immunology, Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, 123 Ta-Pei Rd, Niao-Sung, Kaohsiung 833, Taiwan
| | - Takashi Fujimura
- Hiroshima Research Center for Healthy Aging (HiHA), Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, Japan
| | - Seiji Kawamoto
- Hiroshima Research Center for Healthy Aging (HiHA), Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, Japan
| | - Kazuhisa Ono
- Hiroshima Research Center for Healthy Aging (HiHA), Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, Japan
- Department of Food Sciences and Biotechnology, Faculty of Life Sciences, Hiroshima Institute of Technology, Hiroshima, Japan
| | - Chao-Long Chen
- Liver Transplantation Center and Department of Surgery, Division of Transplant Immunology, Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, 123 Ta-Pei Rd, Niao-Sung, Kaohsiung 833, Taiwan
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14
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Taniuchi K, Tsuboi M, Sakaguchi M, Saibara T. Measurement of serum PODXL concentration for detection of pancreatic cancer. Onco Targets Ther 2018; 11:1433-1445. [PMID: 29588598 PMCID: PMC5858829 DOI: 10.2147/ott.s155367] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Background The aim of this study was to investigate the use of podocalyxin (PODXL) and secretoglobin family 1D, member 2 (SCGB1D2) expressions in whole blood as diagnostic biomarkers to distinguish between patients with pancreatic cancer and control participants, in comparison with serum cancer antigen 19-9 (CA19-9), which is the current clinical standard. Patients and methods Flow cytometric analysis was performed to determine the expressions of PODXL and SCGB1D2 on the surface of cultured pancreatic cancer cells. Immunoblotting was performed to determine whether PODXL and SCGB1D2 were detectable in the media of cultured pancreatic cancer cells. A discovery-stage clinical study was performed in a cohort of 23 patients with pancreatic cancer and 51 control individuals without pancreatic disease who had been treated in the Department of Gastroenterology and Hepatology at Kochi Medical School Hospital from April 2014 to January 2016. Serum PODXL and SCGB1D2 levels were measured by enzyme-linked immunosorbent assay (ELISA). Results PODXL and SCGB1D2 accumulated in the protrusions of cultured pancreatic cancer cells, and they were detectable both on the cell surface and in the cultured media from these cells. The discovery-stage clinical study showed that the area under the receiver-operating characteristic curve (AUC) was 0.96 (95% confidence interval [CI] 0.91–1.000) for PODXL, 0.80 (95% CI 0.67–0.94) for SCGB1D2, and 0.78 (95% CI 0.66–0.90) for CA19-9. The AUC for PODXL was thus significantly higher than that for CA19-9 (P = 0.006). The combination of SCGB1D2 with CA19-9 did not significantly increase the AUC (0.83; 95% CI 0.70–0.96) compared with the AUC for either SCGB1D2 or CA19-9 alone (P = 0.563). Conclusion PODXL may be a novel, non-invasive diagnostic biomarker for the detection of pancreatic cancer.
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Affiliation(s)
- Keisuke Taniuchi
- Department of Endoscopic Diagnostics and Therapeutics, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan.,Department of Gastroenterology and Hepatology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Makiko Tsuboi
- Department of Gastroenterology and Hepatology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Masahiko Sakaguchi
- Integrated Center for Advanced Medical Technologies, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan.,Cancer Prevention and Control Division, Kanagawa Cancer Center Research Institute, Yokohama, Kanagawa, Japan
| | - Toshiji Saibara
- Department of Endoscopic Diagnostics and Therapeutics, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan.,Department of Gastroenterology and Hepatology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
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15
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Wong SL, To J, Santos J, Allam VSRR, Dalton JP, Djordjevic SP, Donnelly S, Padula MP, Sukkar MB. Proteomic Analysis of Extracellular HMGB1 Identifies Binding Partners and Exposes Its Potential Role in Airway Epithelial Cell Homeostasis. J Proteome Res 2017; 17:33-45. [PMID: 28976774 DOI: 10.1021/acs.jproteome.7b00212] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The release of damage-associated molecular patterns (DAMPs) by airway epithelial cells is believed to play a crucial role in the initiation and development of chronic airway conditions such as asthma and chronic obstructive pulmonary disease (COPD). Intriguingly, the classic DAMP high-mobility group box-1 (HMGB1) is detected in the culture supernatant of airway epithelial cells under basal conditions, indicating a role for HMGB1 in the regulation of epithelial cellular and immune homeostasis. To gain contextual insight into the potential role of HMGB1 in airway epithelial cell homeostasis, we used the orthogonal and complementary methods of high-resolution clear native electrophoresis, immunoprecipitation, and pull-downs coupled to liquid chromatography-tandem mass spectrometry (LC-MS/MS) to profile HMGB1 and its binding partners in the culture supernatant of unstimulated airway epithelial cells. We found that HMGB1 presents exclusively as a protein complex under basal conditions. Moreover, protein network analysis performed on 185 binding proteins revealed 14 that directly associate with HMGB1: amyloid precursor protein, F-actin-capping protein subunit alpha-1 (CAPZA1), glyceraldehyde-3 phosphate dehydrogenase (GAPDH), ubiquitin, several members of the heat shock protein family (HSPA8, HSP90B1, HSP90AA1), XRCC5 and XRCC6, high mobility group A1 (HMGA1), histone 3 (H3F3B), the FACT (facilitates chromatin transcription) complex constituents SUPT1H and SSRP1, and heterogeneous ribonucleoprotein K (HNRNPK). These studies provide a new understanding of the extracellular functions of HMGB1 in cellular and immune homeostasis at the airway mucosal surface and could have implications for therapeutic targeting.
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Affiliation(s)
- Sharon L Wong
- Discipline of Pharmacy, Graduate School of Health, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia
| | - Joyce To
- School of Life Sciences, Faculty of Science, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia
| | - Jerran Santos
- School of Life Sciences, Faculty of Science, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia
| | - Venkata Sita Rama Raju Allam
- Discipline of Pharmacy, Graduate School of Health, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia
| | - John P Dalton
- School of Life Sciences, Faculty of Science, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia.,School of Biological Sciences, Queen's University , Belfast BT9 7BL, Northern Ireland
| | - Steven P Djordjevic
- The ithree institute, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia
| | - Sheila Donnelly
- School of Life Sciences, Faculty of Science, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia
| | - Matthew P Padula
- School of Life Sciences, Faculty of Science, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia.,The ithree institute, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia
| | - Maria B Sukkar
- Discipline of Pharmacy, Graduate School of Health, The University of Technology Sydney , Ultimo, New South Wales 2007, Australia
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16
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Umair S, Bouchet CLG, Knight JS, Pernthaner A, Simpson HV. Molecular and biochemical characterisation and recognition by the immune host of the glyceraldehyde 3-phosphate dehydrogenase (GAPDH) of the abomasal nematode parasite Teladorsagia circumcincta. Exp Parasitol 2017; 181:40-46. [PMID: 28757123 DOI: 10.1016/j.exppara.2017.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 07/18/2017] [Accepted: 07/26/2017] [Indexed: 10/19/2022]
Abstract
A 1023 bp full length cDNA encoding Teladorsagia circumcincta GAPDH (TeciGAPDH) was cloned, expressed in Escherichia coli and the recombinant protein purified and its kinetic properties determined. A phylogenetic tree was constructed using helminth GAPDH sequences. The predicted protein consisted of 341 amino acids and was present as a single band of about 38 kDa on SDS-PAGE. Multiple alignments of the protein sequence of TeciGAPDH with homologues from other helminths showed that the greatest similarity (93%) to the GAPDH of Haemonchus contortus and Dictyocaulus viviparus, 82-86% similarity to the other nematode sequences and 68-71% similarity to cestode and trematode enzymes. Substrate binding sites and conserved regions were identified and were completely conserved in other homologues. At 25 °C, the optimum pH for TeciGAPDH activity was pH 8, the Vmax was 1052 ± 23 nmol min-1 mg-1 protein and the apparent Km for the substrate glyceraldehyde-3-phosphate was 0.02 ± 0.01 mM (both mean ± SD, n = 2). Antibodies in both serum and saliva from field-immune, but not nematode-naïve, sheep recognised recombinant TeciGAPDH in enzyme-linked immunosorbent assays. The recognition of the recombinant protein by antibodies generated by exposure of sheep to native GAPDH indicates similar antigenicity of the two proteins.
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Affiliation(s)
- S Umair
- AgResearch Ltd, Private Bag 11-008, Palmerston North, New Zealand.
| | - C L G Bouchet
- AgResearch Ltd, Private Bag 11-008, Palmerston North, New Zealand
| | - J S Knight
- AgResearch Ltd, Private Bag 11-008, Palmerston North, New Zealand
| | - A Pernthaner
- AgResearch Ltd, Private Bag 11-008, Palmerston North, New Zealand
| | - H V Simpson
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand
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17
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Schröder H, Fischer R, Sollfrank L, Paulsen F, Bräuer L, Schicht M. Expression of recombinant surfactant protein SFTA3 in the human kidney cell line HEK 293T. Ann Anat 2017; 211:149-157. [DOI: 10.1016/j.aanat.2017.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 01/17/2017] [Indexed: 10/20/2022]
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18
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Abstract
Aside from its well-established role in glycolysis, glyceraldehyde-3-phosphate dehydrogenase (GAPDH) has been shown to possess many key functions in cells. These functions are regulated by protein oligomerization , biomolecular interactions, post-translational modifications , and variations in subcellular localization . Several GAPDH functions and regulatory mechanisms overlap with one another and converge around its role in intermediary metabolism. Several structural determinants of the protein dictate its function and regulation. GAPDH is ubiquitously expressed and is found in all domains of life. GAPDH has been implicated in many diseases, including those of pathogenic, cardiovascular, degenerative, diabetic, and tumorigenic origins. Understanding the mechanisms by which GAPDH can switch between its functions and how these functions are regulated can provide insights into ways the protein can be modulated for therapeutic outcomes.
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19
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Kitakaze T, Sakamoto T, Kitano T, Inoue N, Sugihara F, Harada N, Yamaji R. The collagen derived dipeptide hydroxyprolyl-glycine promotes C2C12 myoblast differentiation and myotube hypertrophy. Biochem Biophys Res Commun 2016; 478:1292-7. [PMID: 27553280 DOI: 10.1016/j.bbrc.2016.08.114] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 08/19/2016] [Indexed: 01/21/2023]
Abstract
The majority of studies on possible roles for collagen hydrolysates in human health have focused on their effects on bone and skin. Hydroxyprolyl-glycine (Hyp-Gly) was recently identified as a novel collagen hydrolysate-derived dipeptide in human blood. However, any possible health benefits of Hyp-Gly remain unclear. Here, we report the effects of Hyp-Gly on differentiation and hypertrophy of murine skeletal muscle C2C12 cells. Hyp-Gly increased the fusion index, the myotube size, and the expression of the myotube-specific myosin heavy chain (MyHC) and tropomyosin structural proteins. Hyp-Gly increased the phosphorylation of Akt, mTOR, and p70S6K in myoblasts, whereas the phosphatidylinositol 3-kinase (PI3K) inhibitor LY294002 inhibited their phosphorylation by Hyp-Gly. LY294002 and the mammalian target of rapamycin (mTOR) inhibitor rapamycin repressed the enhancing effects of Hyp-Gly on MyHC and tropomyosin expression. The peptide/histidine transporter 1 (PHT1) was highly expressed in both myoblasts and myotubes, and co-administration of histidine inhibited Hyp-Gly-induced phosphorylation of p70S6K in myoblasts and myotubes. These results indicate that Hyp-Gly can induce myogenic differentiation and myotube hypertrophy and suggest that Hyp-Gly promotes myogenic differentiation by activating the PI3K/Akt/mTOR signaling pathway, perhaps depending on PHT1 for entry into cells.
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Affiliation(s)
- Tomoya Kitakaze
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan
| | - Tomotaka Sakamoto
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan
| | - Takehiro Kitano
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan
| | - Naoki Inoue
- Nitta Gelatin Inc., Peptide Division, 2-22 Futamata, Yao, Osaka, 5810024, Japan
| | - Fumihito Sugihara
- Nitta Gelatin Inc., Peptide Division, 2-22 Futamata, Yao, Osaka, 5810024, Japan
| | - Naoki Harada
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan
| | - Ryoichi Yamaji
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan.
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20
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Qiao J, Fang CY, Chen SX, Wang XQ, Cui SJ, Liu XH, Jiang YH, Wang J, Zhang Y, Yang PY, Liu F. Stroma derived COL6A3 is a potential prognosis marker of colorectal carcinoma revealed by quantitative proteomics. Oncotarget 2016; 6:29929-46. [PMID: 26338966 PMCID: PMC4745773 DOI: 10.18632/oncotarget.4966] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 08/04/2015] [Indexed: 12/22/2022] Open
Abstract
Colorectal cancer (CRC) represents the third most common cancer in males and second in females worldwide. Here, we performed a quantitative 8-plex iTRAQ proteomics analysis of the secreted proteins from five colonic fibroblast cultures and three colon cancer epithelial cell lines. We identified 1114 proteins at 0% FDR, including 587 potential secreted proteins. We further recognized 116 fibroblast-enriched proteins which were significantly associated with cell movement, angiogenesis, proliferation and wound healing, and 44 epithelial cell-enriched proteins. By interrogation of Oncomine database, we found that 20 and 8 fibroblast-enriched proteins were up- and downregulated in CRC, respectively. Western blots confirmed the fibroblast-specific secretion of filamin C, COL6A3, COL4A1 and spondin-2. Upregulated mRNA and stroma expression of COL6A3 in CRC, which were revealed by Oncomine analyses and tissue-microarray-immunohistochemistry, indicated poor prognosis. COL6A3 expression was significantly associated with Dukes stage, T stage, stage, recurrence and smoking status. Circulating plasma COL6A3 in CRC patients was upregulated significantly comparing with healthy peoples. Receiver operating characteristic curve analysis revealed that COL6A3 has better predictive performance for CRC with an area under the curve of 0.885 and the best sensitivity/specificity of 92.9%/81.3%. Thus we demonstrated that COL6A3 was a potential diagnosis and prognosis marker of CRC.
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Affiliation(s)
- Jie Qiao
- Department of Medical Systems Biology, School of Basic Medical Sciences, Shanghai, China.,Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Cai-Yun Fang
- Department of Chemistry, Fudan University, Shanghai, China
| | - Sun-Xia Chen
- Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Xiao-Qing Wang
- Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Shu-Jian Cui
- College of Bioscience and Biotechnology, Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou, China
| | - Xiao-Hui Liu
- Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Ying-Hua Jiang
- Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Jie Wang
- Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yang Zhang
- Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Peng-Yuan Yang
- Department of Medical Systems Biology, School of Basic Medical Sciences, Shanghai, China.,Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Department of Chemistry, Fudan University, Shanghai, China
| | - Feng Liu
- Department of Medical Systems Biology, School of Basic Medical Sciences, Shanghai, China.,Institutes of Biomedical Sciences, Fudan University, Shanghai, China
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21
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Small molecules modulating tumor-stromal cell interactions: new candidates for anti-tumor drugs. J Antibiot (Tokyo) 2016; 69:411-4. [PMID: 27005556 DOI: 10.1038/ja.2016.37] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 02/23/2016] [Accepted: 03/01/2016] [Indexed: 11/08/2022]
Abstract
The tumor microenvironment comprises tumor cells surrounding normal cells and the extracellular matrix. The surrounding normal cells have critical roles in the regulation of growth and metastasis of cancers, including the maintenance of cancer stem cells and the formation of cancer metastatic niches. Recent anti-tumor strategies targeting the tumor microenvironment have included inhibition of angiogenesis and the augmentation of immune reactions. However, in this review, we will focus on stromal cells (fibroblast-like cells), a common constituent of the tumor microenvironment. Since stromal cells regulate the growth of cancer cells positively and negatively through adhesion and secreted factors, anti-tumor strategies should consider modulating tumor-stromal cell interactions through use of small molecules.
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22
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Mikhaylova ER, Lazarev VF, Nikotina AD, Margulis BA, Guzhova IV. Glyceraldehyde 3-phosphate dehydrogenase augments the intercellular transmission and toxicity of polyglutamine aggregates in a cell model of Huntington disease. J Neurochem 2016; 136:1052-63. [PMID: 26662373 DOI: 10.1111/jnc.13463] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Revised: 11/03/2015] [Accepted: 11/30/2015] [Indexed: 12/23/2022]
Abstract
The common feature of Huntington disease is the accumulation of oligomers or aggregates of mutant huntingtin protein (mHTT), which causes the death of a subset of striatal neuronal populations. The cytotoxic species can leave neurons and migrate to other groups of cells penetrating and damaging them in a prion-like manner. We hypothesized that the glycolytic enzyme glyceraldehyde 3-phosphate dehydrogenase (GAPDH), previously shown to elevate the aggregation of mHTT, is associated with an increased efficiency of intercellular propagation of mHTT. GAPDH, on its own or together with polyglutamine species, was shown to be released into the extracellular milieu mainly from dying cells as assessed by a novel enzyme immunoassay, western blotting, and ultrafiltration. The conditioned medium of cells with growing GAPDH-polyQ aggregates was toxic to naïve cells, whereas depletion of the aggregates from the medium lowered this cytotoxicity. The GAPDH component of the aggregates was found to increase their toxicity by two-fold in comparison with polyQ alone. Furthermore, GAPDH-polyQ complexes were shown to penetrate acceptor cells and to increase the capacity of polyQ to prionize its intracellular homolog containing a repeat of 25 glutamine residues. Finally, inhibitors of intracellular transport showed that polyQ-GAPDH complexes, as well as GAPDH itself, penetrated cells using clathrin-mediated endocytosis. This suggested a pivotal role of the enzyme in the intercellular transmission of Huntington disease pathogenicity. In conclusion, GAPDH occurring in complexes with polyglutamine strengthens the prion-like activity and toxicity of the migrating aggregates. Aggregating polygluatmine tracts were shown to release from the cells over-expressing mutant huntingtin in a complex with glyceraldehyde 3-phosphate dehydrogenase (GAPDH). The enzyme enhances the intracellular transport of aggregates to healthy cells, prionization of normal cellular proteins and finally cell death, thus demonstrating the pivotal role of GAPDH in the horizontal transmission of neurodegeneration.
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Affiliation(s)
- Elena R Mikhaylova
- Laboratory of Cell Protection Mechanisms, Institute of Cytology of the Russian Academy of Sciences, St. Petersburg, Russia
| | - Vladimir F Lazarev
- Laboratory of Cell Protection Mechanisms, Institute of Cytology of the Russian Academy of Sciences, St. Petersburg, Russia
| | - Alina D Nikotina
- Laboratory of Cell Protection Mechanisms, Institute of Cytology of the Russian Academy of Sciences, St. Petersburg, Russia
| | - Boris A Margulis
- Laboratory of Cell Protection Mechanisms, Institute of Cytology of the Russian Academy of Sciences, St. Petersburg, Russia
| | - Irina V Guzhova
- Laboratory of Cell Protection Mechanisms, Institute of Cytology of the Russian Academy of Sciences, St. Petersburg, Russia
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23
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Chauhan AS, Rawat P, Malhotra H, Sheokand N, Kumar M, Patidar A, Chaudhary S, Jakhar P, Raje CI, Raje M. Secreted multifunctional Glyceraldehyde-3-phosphate dehydrogenase sequesters lactoferrin and iron into cells via a non-canonical pathway. Sci Rep 2015; 5:18465. [PMID: 26672975 PMCID: PMC4682080 DOI: 10.1038/srep18465] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 11/18/2015] [Indexed: 01/08/2023] Open
Abstract
Lactoferrin is a crucial nutritionally important pleiotropic molecule and iron an essential trace metal for all life. The current paradigm is that living organisms have evolved specific membrane anchored receptors along with iron carrier molecules for regulated absorption, transport, storage and mobilization of these vital nutrients. We present evidence for the existence of non-canonical pathway whereby cells actively forage these vital resources from beyond their physical boundaries, by secreting the multifunctional housekeeping enzyme Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) into the extracellular milieu. This effect’s an autocrine/paracrine acquisition of target ligand into the cell. Internalization by this route is extensively favoured even by cells that express surface receptors for lactoferrin and involves urokinase plasminogen activator receptor (uPAR). We also demonstrate the operation of this phenomenon during inflammation, as an arm of the innate immune response where lactoferrin denies iron to invading microorganisms by chelating it and then itself being sequestered into surrounding host cells by GAPDH.
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Affiliation(s)
- Anoop S Chauhan
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
| | - Pooja Rawat
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
| | - Himanshu Malhotra
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
| | - Navdeep Sheokand
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
| | - Manoj Kumar
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
| | - Anil Patidar
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
| | - Surbhi Chaudhary
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
| | - Priyanka Jakhar
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
| | - Chaaya I Raje
- National Institute of Pharmaceutical Education &Research, Phase X, Sector 67, SAS Nagar, INDIA-160062 Punjab
| | - Manoj Raje
- Institute of Microbial Technology, CSIR, Sector 39A, INDIA-160036 Chandigarh
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24
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Itakura M, Nakajima H, Kubo T, Semi Y, Kume S, Higashida S, Kaneshige A, Kuwamura M, Harada N, Kita A, Azuma YT, Yamaji R, Inui T, Takeuchi T. Glyceraldehyde-3-phosphate Dehydrogenase Aggregates Accelerate Amyloid-β Amyloidogenesis in Alzheimer Disease. J Biol Chem 2015; 290:26072-87. [PMID: 26359500 DOI: 10.1074/jbc.m115.669291] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Indexed: 11/06/2022] Open
Abstract
Alzheimer disease (AD) is a progressive neurodegenerative disorder characterized by loss of neurons and formation of pathological extracellular deposits induced by amyloid-β peptide (Aβ). Numerous studies have established Aβ amyloidogenesis as a hallmark of AD pathogenesis, particularly with respect to mitochondrial dysfunction. We have previously shown that glycolytic glyceraldehyde-3-phosphate dehydrogenase (GAPDH) forms amyloid-like aggregates upon exposure to oxidative stress and that these aggregates contribute to neuronal cell death. Here, we report that GAPDH aggregates accelerate Aβ amyloidogenesis and subsequent neuronal cell death both in vitro and in vivo. Co-incubation of Aβ40 with small amounts of GAPDH aggregates significantly enhanced Aβ40 amyloidogenesis, as assessed by in vitro thioflavin-T assays. Similarly, structural analyses using Congo red staining, circular dichroism, and atomic force microscopy revealed that GAPDH aggregates induced Aβ40 amyloidogenesis. In PC12 cells, GAPDH aggregates augmented Aβ40-induced cell death, concomitant with disruption of mitochondrial membrane potential. Furthermore, mice injected intracerebroventricularly with Aβ40 co-incubated with GAPDH aggregates exhibited Aβ40-induced pyramidal cell death and gliosis in the hippocampal CA3 region. These observations were accompanied by nuclear translocation of apoptosis-inducing factor and cytosolic release of cytochrome c from mitochondria. Finally, in the 3×Tg-AD mouse model of AD, GAPDH/Aβ co-aggregation and mitochondrial dysfunction were consistently detected in an age-dependent manner, and Aβ aggregate formation was attenuated by GAPDH siRNA treatment. Thus, this study suggests that GAPDH aggregates accelerate Aβ amyloidogenesis, subsequently leading to mitochondrial dysfunction and neuronal cell death in the pathogenesis of AD.
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Affiliation(s)
- Masanori Itakura
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
| | - Hidemitsu Nakajima
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
| | - Takeya Kubo
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
| | - Yuko Semi
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
| | - Satoshi Kume
- the Laboratories of Biological Macromolecules and
| | - Shusaku Higashida
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
| | - Akihiro Kaneshige
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Osaka 5988531 and
| | - Naoki Harada
- Nutrition Chemistry, Osaka Prefecture University, Osaka 5998531, Japan
| | - Akinori Kita
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
| | - Yasu-Taka Azuma
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
| | - Ryoichi Yamaji
- Nutrition Chemistry, Osaka Prefecture University, Osaka 5998531, Japan
| | - Takashi Inui
- the Laboratories of Biological Macromolecules and
| | - Tadayoshi Takeuchi
- From the Laboratory of Veterinary Pharmacology, Graduate School of Life and Environmental Sciences, and
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25
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Takenouchi T, Tsukimoto M, Iwamaru Y, Sugama S, Sekiyama K, Sato M, Kojima S, Hashimoto M, Kitani H. Extracellular ATP induces unconventional release of glyceraldehyde-3-phosphate dehydrogenase from microglial cells. Immunol Lett 2015; 167:116-24. [PMID: 26277554 DOI: 10.1016/j.imlet.2015.08.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/16/2015] [Accepted: 08/10/2015] [Indexed: 12/17/2022]
Abstract
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a key glycolytic enzyme that is predominantly localized in the cytoplasm. However, recent studies have suggested that GAPDH is released by various cells and that extracellular GAPDH is involved in the regulation of neuritogenesis in neuronal cells. It has also been reported that GAPDH is expressed on the surfaces of macrophages and functions as a transferrin receptor. However, since GAPDH is a leaderless protein the mechanisms by which it reaches the extracellular environment remain unclear. Here, we examined the role of P2X7 receptor (P2X7R), an ATP-gated cation channel, in the unconventional release of GAPDH from microglial cells, the resident macrophages in the brain. The activation of P2X7R by ATP triggered GAPDH release from lipopolysaccharide (LPS)-primed microglial cells. ATP-induced microvesicle formation, exosome release, and K(+) efflux followed by caspase-1 activation are likely involved in the GAPDH release, but ATP-induced dilatation of membrane pores and lysosome exocytosis are not. It was also demonstrated that exogenous GAPDH facilitated LPS-induced phosphorylation of p38 MAP kinase in microglial cells. These findings suggest that P2X7R plays an important role in the unconventional release of GAPDH from microglial cells, and the GAPDH released into the extracellular space might be involved in the regulation of the neuroinflammatory response in the brain.
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Affiliation(s)
- Takato Takenouchi
- Animal Immune and Cell Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan.
| | - Mitsutoshi Tsukimoto
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Yoshifumi Iwamaru
- Prion Disease Research Center, National Institute of Animal Health, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
| | - Shuei Sugama
- Department of Physiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Kazunari Sekiyama
- Division of Sensory and Motor Systems, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-0057, Japan
| | - Mitsuru Sato
- Animal Immune and Cell Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Shuji Kojima
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Makoto Hashimoto
- Division of Sensory and Motor Systems, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-0057, Japan
| | - Hiroshi Kitani
- Animal Immune and Cell Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan.
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26
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Mitani T, Minami M, Harada N, Ashida H, Yamaji R. Autophagic degradation of the androgen receptor mediated by increased phosphorylation of p62 suppresses apoptosis in hypoxia. Cell Signal 2015; 27:1994-2001. [PMID: 26186973 DOI: 10.1016/j.cellsig.2015.07.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 07/13/2015] [Indexed: 12/25/2022]
Abstract
Prostate cancer grows under hypoxic conditions. Hypoxia decreases androgen receptor (AR) protein levels. However, the molecular mechanism remains unclear. Here, we report that p62-mediated autophagy degrades AR protein and suppresses apoptosis in prostate cancer LNCaP cells in hypoxia. In LNCaP cells, hypoxia decreased AR at the protein level, but not at the mRNA level. Hypoxia-induced AR degradation was inhibited not only by knockdown of LC3, a key component of the autophagy machinery, but also by knockdown of p62. Depletion of p62 enhanced hypoxia-induced poly(ADP-ribose) polymerase cleavage and caspase-3 cleavage, markers of apoptosis, whereas simultaneous knockdown of p62 and AR suppressed hypoxia-induced apoptosis. Hypoxia increased the formation of a cytosolic p62-AR complex and enhanced sequestration of AR from the nucleus. Formation of this complex was promoted by the increased phosphorylation of serine 403 in the ubiquitin-associated domain of p62 during hypoxia. An antioxidant and an AMP-activated protein kinase (AMPK) inhibitor reduced hypoxia-induced p62 phosphorylation at serine 403 and suppressed hypoxia-induced complex formation between AR and p62. These results demonstrate that hypoxia enhances the complex formation between p62 and AR by promoting phosphorylation of p62 at serine 403, probably through activating AMPK, and that p62-mediated autophagy degrades AR protein for cell survival in hypoxia.
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Affiliation(s)
- Takakazu Mitani
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 5998531, Japan; Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo 6578501, Japan
| | - Masato Minami
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 5998531, Japan
| | - Naoki Harada
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 5998531, Japan
| | - Hitoshi Ashida
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo 6578501, Japan
| | - Ryoichi Yamaji
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 5998531, Japan.
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27
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Protein moonlighting in iron metabolism: glyceraldehyde-3-phosphate dehydrogenase (GAPDH). Biochem Soc Trans 2015; 42:1796-801. [PMID: 25399609 DOI: 10.1042/bst20140220] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Iron is essential for the survival of both prokaryotic and eukaryotic organisms. It functions as a cofactor for several vital enzymes and iron deprivation is fatal to cells. However, at the same time, excess amounts of iron are also toxic to cells due to the formation of free radicals via the Fenton reaction. As a consequence of its double-edged behaviour, the uptake and regulation of iron involves an intricate balance of acquisition, trafficking, recycling and shuffling between various tissues and organs. This is accomplished by differential regulation of genes involving numerous proteins and enzymes. Several of the proteins identified in these processes, such as glyceraldehyde-3-phosphate dehydrogenase (GAPDH), aconitase and lactoferrin (Lf), possess multiple functions within the cell. Such proteins are referred to as moonlighting or multifunctional proteins, whereby proteins initially thought to possess a single well-established function have subsequently been discovered to exhibit alternative functions. In many cases, these multiple functions are conserved across species.
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Kunjithapatham R, Geschwind JF, Devine L, Boronina TN, O'Meally RN, Cole RN, Torbenson MS, Ganapathy-Kanniappan S. Occurrence of a multimeric high-molecular-weight glyceraldehyde-3-phosphate dehydrogenase in human serum. J Proteome Res 2015; 14:1645-56. [PMID: 25734908 DOI: 10.1021/acs.jproteome.5b00089] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Cellular glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a phylogenetically conserved, ubiquitous enzyme that plays an indispensable role in energy metabolism. Although a wealth of information is available on cellular GAPDH, there is a clear paucity of data on its extracellular counterpart (i.e., the secreted or extracellular GAPDH). Here, we show that the extracellular GAPDH in human serum is a multimeric, high-molecular-weight, yet glycolytically active enzyme. The high-molecular-weight multimers of serum GAPDH were identified by immunodetection on one- and two-dimensional gel electrophoresis using multiple antibodies specific for various epitopes of GAPDH. Partial purification of serum GAPDH by DEAE Affigel affinity/ion exchange chromatography further established the multimeric composition of serum GAPDH. In vitro data demonstrated that human cell lines secrete a multimeric, high-molecular-weight enzyme similar to that of serum GAPDH. Furthermore, LC-MS/MS analysis of extracellular GAPDH from human cell lines confirmed the presence of unique peptides of GAPDH in the high-molecular-weight subunits. Furthermore, data from pulse-chase experiments established the presence of high-molecular-weight subunits in the secreted, extracellular GAPDH. Taken together, our findings demonstrate the presence of a high-molecular-weight, enzymatically active secretory GAPDH in human serum that may have a hitherto unknown function in humans.
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Affiliation(s)
- Rani Kunjithapatham
- †Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, United States
| | - Jean-Francois Geschwind
- †Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, United States
| | - Lauren Devine
- ‡Mass Spectrometry and Proteomics Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Tatiana N Boronina
- ‡Mass Spectrometry and Proteomics Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Robert N O'Meally
- ‡Mass Spectrometry and Proteomics Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Robert N Cole
- ‡Mass Spectrometry and Proteomics Facility, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Michael S Torbenson
- §Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, United States
| | - Shanmugasundaram Ganapathy-Kanniappan
- †Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, United States
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29
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Stromal cells positively and negatively modulate the growth of cancer cells: stimulation via the PGE2-TNFα-IL-6 pathway and inhibition via secreted GAPDH-E-cadherin interaction. PLoS One 2015; 10:e0119415. [PMID: 25785838 PMCID: PMC4364666 DOI: 10.1371/journal.pone.0119415] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 01/13/2015] [Indexed: 02/04/2023] Open
Abstract
Fibroblast-like stromal cells modulate cancer cells through secreted factors and adhesion, but those factors are not fully understood. Here, we have identified critical stromal factors that modulate cancer growth positively and negatively. Using a cell co-culture system, we found that gastric stromal cells secreted IL-6 as a growth and survival factor for gastric cancer cells. Moreover, gastric cancer cells secreted PGE2 and TNFα that stimulated IL-6 secretion by the stromal cells. Furthermore, we found that stromal cells secreted glyceraldehyde 3-phosphate dehydrogenase (GAPDH). Extracellular GAPDH, or its N-terminal domain, inhibited gastric cancer cell growth, a finding confirmed in other cell systems. GAPDH bound to E-cadherin and downregulated the mTOR-p70S6 kinase pathway. These results demonstrate that stromal cells could regulate cancer cell growth through the balance of these secreted factors. We propose that negative regulation of cancer growth using GAPDH could be a new anti-cancer strategy.
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30
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Comparative secretome analysis of rat stomach under different nutritional status. J Proteomics 2015; 116:44-58. [PMID: 25579404 DOI: 10.1016/j.jprot.2015.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 12/23/2014] [Accepted: 01/01/2015] [Indexed: 01/09/2023]
Abstract
UNLABELLED Obesity is a major public health threat for many industrialised countries. Bariatric surgery is the most effective treatment against obesity, suggesting that gut derived signals are crucial for energy balance regulation. Several descriptive studies have proven the presence of gastric endogenous systems that modulate energy homeostasis; however, these systems and the interactions between them are still not well known. In the present study, we show for the first time the comparative 2-DE gastric secretome analysis under different nutritional status. We have identified 38 differently secreted proteins by comparing stomach secretomes from tissue explant cultures of rats under feeding, fasting and re-feeding conditions. Among the proteins identified, glyceraldehyde-3-phosphate dehydrogenase was found to be more abundant in gastric secretome and plasma after re-feeding, and downregulated in obesity. Additionally, two calponin-1 species were decreased in feeding state, and other were modulated by nutritional and metabolic conditions. These and other secreted proteins identified in this work may be considered as potential gastrokines implicated in food intake regulation. BIOLOGICAL SIGNIFICANCE The present work has an important impact in the field of obesity, especially in the regulation of body weight maintenance by the stomach. Nowadays, the most effective treatment in the fight against obesity is bariatric surgery, which suggests that stomach derived signals might be crucial for the regulation of the energy homeostasis. However, until now, the knowledge about the gastrokines and its mechanism of action has been poorly elucidated. In the present work, we had updated a previously validated explant secretion model for proteomic studies; this analysis allowed us, for the first time, to study the gastric secretome without interferences from other organs. We had identified 38 differently secreted proteins comparing ex vivo cultured stomachs from rats under feeding, fasting and re-feeding regimes. The results in the present article provide novel targets to study the role of the stomach in body weight and appetite regulation, and suggest new potential therapeutic targets for treating obesity.
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Takaoka Y, Goto S, Nakano T, Tseng HP, Yang SM, Kawamoto S, Ono K, Chen CL. Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) prevents lipopolysaccharide (LPS)-induced, sepsis-related severe acute lung injury in mice. Sci Rep 2014; 4:5204. [PMID: 24902773 PMCID: PMC4047534 DOI: 10.1038/srep05204] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 05/19/2014] [Indexed: 01/08/2023] Open
Abstract
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is an energy metabolism-related enzyme in the glycolytic pathway. Recently, it has been reported that GAPDH has other physiological functions, such as apoptosis, DNA repair and autophagy. Some in vitro studies have indicated immunological aspects of GAPDH function, although there is no definite study discussing the advantage of GAPDH as a therapeutic target. Here, we show that GAPDH has an anti-inflammatory function by using a lipopolysaccharide (LPS)-induced, sepsis-related severe acute lung injury (ALI) mouse model, which is referred to as acute respiratory distress syndrome (ARDS) in humans. GAPDH pre-injected mice were protected from septic death, and their serum levels of proinflammatory cytokines were significantly suppressed. In lung tissue, LPS-induced acute injury and neutrophil accumulation were strongly inhibited by GAPDH pre-injection. Pulmonary, proinflammatory cytokine gene expression and serum chemokine expression in GAPDH pre-injected mice were also reduced. These data suggest the therapeutic potential of GAPDH for sepsis-related ALI/ARDS.
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Affiliation(s)
- Yuki Takaoka
- 1] Liver Transplantation Program and Division of Transplant Immunology, Center for Translational Research in Biomedical Sciences, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan [2] Center for Gene Science, Hiroshima University, Higashi-Hiroshima, Japan
| | - Shigeru Goto
- 1] Liver Transplantation Program and Division of Transplant Immunology, Center for Translational Research in Biomedical Sciences, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan [2] Iwao Hospital, Yufuin, Japan
| | - Toshiaki Nakano
- 1] Liver Transplantation Program and Division of Transplant Immunology, Center for Translational Research in Biomedical Sciences, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan [2] Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Hui-Peng Tseng
- 1] Liver Transplantation Program and Division of Transplant Immunology, Center for Translational Research in Biomedical Sciences, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan [2] Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Shih-Ming Yang
- 1] Liver Transplantation Program and Division of Transplant Immunology, Center for Translational Research in Biomedical Sciences, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan [2] Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Seiji Kawamoto
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan
| | - Kazuhisa Ono
- 1] Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan [2] Department of Food Sciences and Biotechnology, Faculty of Life Sciences, Hiroshima Institute of Technology, Hiroshima, Japan
| | - Chao-Long Chen
- Liver Transplantation Program and Division of Transplant Immunology, Center for Translational Research in Biomedical Sciences, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
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A Yeast Bioassay for Androgenic and Anti-Androgenic Compounds Based on the NH2- and COOH-Terminal Interaction of Androgen Receptor. Biosci Biotechnol Biochem 2014; 74:1965-8. [DOI: 10.1271/bbb.100323] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Zhai D, Chin K, Wang M, Liu F. Disruption of the nuclear p53-GAPDH complex protects against ischemia-induced neuronal damage. Mol Brain 2014; 7:20. [PMID: 24670206 PMCID: PMC3986870 DOI: 10.1186/1756-6606-7-20] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 02/28/2014] [Indexed: 12/24/2022] Open
Abstract
Glyceraldehyde 3-phosphate dehydrogenase (GAPDH) is conventionally considered a critical enzyme that involves in glycolysis for energy production. Recent previous studies have suggested that GAPDH is important in glutamate-induced neuronal excitotoxicity, while accumulated evidence also demonstrated that GAPDH nuclear translocation plays a critical role in cell death. However, the molecular mechanisms underlying this process remain largely unknown. In this study, we showed that GAPDH translocates to the nucleus in a Siah1-dependent manner upon glutamate stimulation. The nuclear GAPDH forms a protein complex with p53 and enhances p53 expression and phosphorylation. Disruption of the GAPDH-p53 interaction with an interfering peptide blocks glutamate-induced cell death and GAPDH-mediated up-regulation of p53 expression and phosphorylation. Furthermore, administration of the interfering peptide in vivo protects against ischemia-induced cell death in rats subjected to tMCAo. Our data suggest that the nuclear p53-GAPDH complex is important in regulating glutamate-mediated neuronal death and could serve as a potential therapeutic target for ischemic stroke treatment.
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Affiliation(s)
| | | | | | - Fang Liu
- Department of Neuroscience, Centre for Addiction and Mental Health, Clarke Division, 250 College Street, Toronto, Ontario M5T 1R8, Canada.
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Braceland M, Bickerdike R, Tinsley J, Cockerill D, Mcloughlin M, Graham D, Burchmore R, Weir W, Wallace C, Eckersall P. The serum proteome of Atlantic salmon, Salmo salar, during pancreas disease (PD) following infection with salmonid alphavirus subtype 3 (SAV3). J Proteomics 2013; 94:423-36. [PMID: 24145143 PMCID: PMC3878379 DOI: 10.1016/j.jprot.2013.10.016] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 09/27/2013] [Accepted: 10/11/2013] [Indexed: 02/07/2023]
Abstract
Salmonid alphavirus is the aetological agent of pancreas disease (PD) in marine Atlantic salmon, Salmo salar, and rainbow trout, Oncorhynchus mykiss, with most outbreaks in Norway caused by SAV subtype 3 (SAV3). This atypical alphavirus is transmitted horizontally causing a significant economic impact on the aquaculture industry. This histopathological and proteomic study, using an established cohabitational experimental model, investigated the correlation between tissue damage during PD and a number of serum proteins associated with these pathologies in Atlantic salmon. The proteins were identified by two-dimensional electrophoresis, trypsin digest and peptide MS/MS fingerprinting. A number of humoral components of immunity which may act as biomarkers of the disease were also identified. For example, creatine kinase, enolase and malate dehydrogenase serum concentrations were shown to correlate with pathology during PD. In contrast, hemopexin, transferrin, and apolipoprotein, amongst others, altered during later stages of the disease and did not correlate with tissue pathologies. This approach has given new insight into not only PD but also fish disease as a whole, by characterisation of the protein response to infection, through pathological processes to tissue recovery. BIOLOGICAL SIGNIFICANCE Salmonid alphavirus causes pancreas disease (PD) in Atlantic salmon, Salmo salar, and has a major economic impact on the aquaculture industry. A proteomic investigation of the change to the serum proteome during PD has been made with an established experimental model of the disease. Serum proteins were identified by two-dimensional electrophoresis, trypsin digest and peptide MS/MS fingerprinting with 72 protein spots being shown to alter significantly over the 12week period of the infection. The concentrations of certain proteins in serum such as creatine kinase, enolase and malate dehydrogenase were shown to correlate with tissue pathology while other proteins such as hemopexin, transferrin, and apolipoprotein, altered in concentration during later stages of the disease and did not correlate with tissue pathologies. The protein response to infection may be used to monitor disease progression and enhance understanding of the pathology of PD.
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Affiliation(s)
- M. Braceland
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Bearsden Rd, Glasgow, G61 1QH, Scotland, UK
| | - R. Bickerdike
- BioMar Ltd., North Shore Road, Grangemouth Docks, Grangemouth, FK3 8UL, Scotland, UK
| | - J. Tinsley
- BioMar Ltd., North Shore Road, Grangemouth Docks, Grangemouth, FK3 8UL, Scotland, UK
| | - D. Cockerill
- Marine Harvest Scotland, Farms Office Blar Mhor Industrial Estate, Fort William, PH33 7PT, Scotland, UK
| | - M.F. Mcloughlin
- Aquatic Vet Services, 35 Cherryvalley Pk, Belfast, BT5 6PN, Northern Ireland, UK
| | - D.A. Graham
- Fish Diseases Unit, Agri-food and Biosciences Institute, Stoney Rd, Stormont, Belfast, BT4 3SD, Northern Ireland, UK
| | - R.J. Burchmore
- Institute of Infection, Immunity & Inflammation, University of Glasgow, Bearsden Rd Glasgow, G61 1QH, Scotland, UK
| | - W. Weir
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Bearsden Rd, Glasgow, G61 1QH, Scotland, UK
| | - C. Wallace
- VESO Vikan, Aquamedical Contract Research, Vikan, N-7800 Namsos, Norway
| | - P.D. Eckersall
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Bearsden Rd, Glasgow, G61 1QH, Scotland, UK
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Dancevic CM, Fraser FW, Smith AD, Stupka N, Ward AC, McCulloch DR. Biosynthesis and expression of a disintegrin-like and metalloproteinase domain with thrombospondin-1 repeats-15: a novel versican-cleaving proteoglycanase. J Biol Chem 2013; 288:37267-76. [PMID: 24220035 DOI: 10.1074/jbc.m112.418624] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The proteoglycanase clade of the ADAMTS superfamily shows preferred proteolytic activity toward the hyalectan/lectican proteoglycans as follows: aggrecan, brevican, neurocan, and versican. ADAMTS15, a member of this clade, was recently identified as a putative tumor suppressor gene in colorectal and breast cancer. However, its biosynthesis, substrate specificity, and tissue expression are poorly described. Therefore, we undertook a detailed study of this proteinase and its expression. We report propeptide processing of the ADAMTS15 zymogen by furin activity, identifying RAKR(212)↓ as a major furin cleavage site within the prodomain. ADAMTS15 was localized on the cell surface, activated extracellularly, and required propeptide processing before cleaving V1 versican at position (441)E↓A(442). In the mouse embryo, Adamts15 was expressed in the developing heart at E10.5 and E11.5 days post-coitum and in the musculoskeletal system from E13.5 to E15.5 days post-coitum, where it was co-localized with hyaluronan. Adamts15 was also highly expressed in several structures within the adult mouse colon. Our findings show overlapping sites of Adamts15 expression with other members of ADAMTS proteoglycanases during embryonic development, suggesting possible cooperative roles during embryogenesis, consistent with other ADAMTS proteoglycanase combinatorial knock-out mouse models. Collectively, these data suggest a role for ADAMTS15 in a wide range of biological processes that are potentially mediated through the processing of versican.
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Affiliation(s)
- Carolyn M Dancevic
- From the School of Medicine, Faculty of Health, and Molecular and Medical Research SRC, Deakin University, 75 Pigdons Road, Waurn Ponds, Victoria 3216, Australia
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Secreted glyceraldehye-3-phosphate dehydrogenase is a multifunctional autocrine transferrin receptor for cellular iron acquisition. Biochim Biophys Acta Gen Subj 2013; 1830:3816-27. [DOI: 10.1016/j.bbagen.2013.03.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 03/13/2013] [Accepted: 03/18/2013] [Indexed: 11/19/2022]
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Ronquist KG, Ek B, Morrell J, Stavreus-Evers A, Ström Holst B, Humblot P, Ronquist G, Larsson A. Prostasomes from four different species are able to produce extracellular adenosine triphosphate (ATP). Biochim Biophys Acta Gen Subj 2013; 1830:4604-10. [PMID: 23707955 DOI: 10.1016/j.bbagen.2013.05.019] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 05/08/2013] [Accepted: 05/13/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND Prostasomes are extracellular vesicles. Intracellularly they are enclosed by another larger vesicle, a so called "storage vesicle" equivalent to a multivesicular body of late endosomal origin. Prostasomes in their extracellular context are thought to play a crucial role in fertilization. METHODS Prostasomes were purified according to a well worked-out schedule from seminal plasmas obtained from human, canine, equine and bovine species. The various prostasomes were subjected to SDS-PAGE separation and protein banding patterns were compared. To gain knowledge of the prostasomal protein systems pertaining to prostasomes of four different species proteins were analyzed using a proteomic approach. An in vitro assay was employed to demonstrate ATP formation by prostasomes of different species. RESULTS The SDS-PAGE banding pattern of prostasomes from the four species revealed a richly faceted picture with most protein bands within the molecular weight range of 10-150kDa. Some protein bands seemed to be concordant among species although differently expressed and the number of protein bands of dog prostasomes seemed to be distinctly fewer. Special emphasis was put on proteins involved in energy metabolic turnover. Prostasomes from all four species were able to form extracellular adenosine triphosphate (ATP). ATP formation was balanced by ATPase activity linked to the four types of prostasomes. CONCLUSION These potencies of a possession of functional ATP-forming enzymes by different prostasome types should be regarded against the knowledge of ATP having a profound effect on cell responses and now explicitly on the success of the sperm cell to fertilize the ovum. GENERAL SIGNIFICANCE This study unravels energy metabolic relationships of prostasomes from four different species.
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Affiliation(s)
- K Göran Ronquist
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden.
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Ronquist KG, Ek B, Stavreus-Evers A, Larsson A, Ronquist G. Human prostasomes express glycolytic enzymes with capacity for ATP production. Am J Physiol Endocrinol Metab 2013; 304:E576-82. [PMID: 23341497 DOI: 10.1152/ajpendo.00511.2012] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Prostasomes are prostate-derived, exosome-like microvesicles that transmit signaling complexes between the acinar epithelial cells of the prostate and sperm cells. The vast majority of prostasomes have a diameter of 30-200 nm, and they are generally surrounded by a classical membrane bilayer. Using a selected proteomic approach, it became increasingly clear that prostasomes harbor distinct subsets of proteins that may be linked to adenosine triphosphate (ATP) metabolic turnover that in turn might be of importance in the role of prostasomes as auxiliary instruments in the fertilization process. Among the 21 proteins identified, most of the enzymes of anaerobic glycolysis were represented, and three of the glycolytic enzymes present are among the top 10 proteins found in most exosomes, once again linking prostasomes to the exosome family. Other prostasomal enzymes involved in ATP turnover were adenylate kinase, ATPase, 5'-nucleotidase, and hexose transporters. The identified enzymes in their prostasomal context were operational for ATP formation when supplied with substrates. The net ATP production was low due to a high prostasomal ATPase activity that could be partially inhibited by vanadate that was utilized to profile the ATP-forming ability of prostasomes. Glucose and fructose were equivalent as glycolytic substrates for prostasomal ATP formation, and the enzymes involved were apparently surface located on prostasomes, since an alternative substrate not being membrane permeable (glyceraldehyde 3-phosphate) was operative, too. There is no clear-cut function linked to this subset of prostasomal proteins, but some possible roles are discussed.
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Affiliation(s)
- K Göran Ronquist
- Department of Medical Sciences, Clinical Chemistry, Uppsala University, Uppsala, Sweden.
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The preventive effect of β-carotene on denervation-induced soleus muscle atrophy in mice. Br J Nutr 2012; 109:1349-58. [PMID: 23046823 DOI: 10.1017/s0007114512003297] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Muscle atrophy increases the production of reactive oxygen species and the expression of atrophy-related genes, which are involved in the ubiquitin-proteasome system. In the present study, we investigated the effects of β-carotene on oxidative stress (100 μM-H2O2)-induced muscle atrophy in murine C2C12 myotubes. β-Carotene (10 μM) restored the H2O2-induced decreased levels of myosin heavy chain and tropomyosin (P< 0·05, n 3) and decreased the H2O2-induced increased levels of ubiquitin conjugates. β-Carotene reduced the H2O2-induced increased expression levels of E3 ubiquitin ligases (Atrogin-1 and MuRF1) and deubiquitinating enzymes (USP14 and USP19) (P< 0·05, n 3) and attenuated the H2O2-induced nuclear localisation of FOXO3a. Furthermore, we determined the effects of β-carotene on denervation-induced muscle atrophy. Male ddY mice (8 weeks old, n 30) were divided into two groups and orally pre-administered micelle with or without β-carotene (0·5 mg once daily) for 2 weeks, followed by denervation in the right hindlimb. β-Carotene was further administered once daily until the end of the experiment. At day 3 after denervation, the ratio of soleus muscle mass in the denervated leg to that in the sham leg was significantly higher in β-carotene-administered mice than in control vehicle-administered ones (P< 0·05, n 5). In the denervated soleus muscle, β-carotene administration significantly decreased the expression levels of Atrogin-1, MuRF1, USP14 and USP19 (P< 0·05, n 5) and the levels of ubiquitin conjugates. These results indicate that β-carotene attenuates soleus muscle loss, perhaps by repressing the expressions of Atrogin-1, MuRF1, USP14 and USP19, at the early stage of soleus muscle atrophy.
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A peptide derived from the highly conserved protein GAPDH is involved in tissue protection by different antifungal strategies and epithelial immunomodulation. J Invest Dermatol 2012; 133:144-53. [PMID: 22832495 PMCID: PMC3488162 DOI: 10.1038/jid.2012.254] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) has an important role not only in glycolysis but also in nonmetabolic processes, including transcription activation and apoptosis. We report the isolation of a human GAPDH (hGAPDH) (2-32) fragment peptide from human placental tissue exhibiting antimicrobial activity. The peptide was internalized by cells of the pathogenic yeast Candida albicans and initiated a rapid apoptotic mechanism, leading to killing of the fungus. Killing was dose-dependent, with 10 μg ml (3.1 μM) and 100 μg ml hGAPDH (2-32) depolarizing 45% and 90% of the fungal cells in a population, respectively. Experimental C. albicans infection induced epithelial hGAPDH (2-32) expression. Addition of the peptide significantly reduced the tissue damage as compared with untreated experimental infection. Secreted aspartic proteinase (Sap) activity of C. albicans was inhibited by the fragment at higher concentrations, with a median effective dose of 160 mg l(-1) (50 μM) for Sap1p and 200 mg l(-1) (63 μM) for Sap2p, whereas Sap3 was not inhibited at all. Interestingly, hGAPDH (2-32) induced significant epithelial IL-8 and GM-CSF secretion and stimulated Toll-like receptor 4 expression at low concentrations independently of the presence of C. albicans, without any toxic mucosal effects. In the future, the combination of different antifungal strategies, e.g., a conventional fungicidal with immunomodulatory effects and the inhibition of fungal virulence factors, might be a promising treatment option.
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Rawat P, Kumar S, Sheokand N, Raje CI, Raje M. The multifunctional glycolytic protein glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a novel macrophage lactoferrin receptor1This article is part of Special Issue entitled Lactoferrin and has undergone the Journal's usual peer review process. Biochem Cell Biol 2012; 90:329-38. [DOI: 10.1139/o11-058] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Several proteins with limited cell type distribution have been shown to bind lactoferrin. However, except in the case of hepatic and intestinal cells, these have not been definitively identified and characterized. Here we report that the multifunctional glycolytic protein glyceraldehyde-3-phosphate dehydrogenase (GAPDH) functions as a novel receptor for lactoferrin (Lf) in macrophages. GAPDH is a well-known moonlighting protein, and previous work from our laboratory has indicated its localization on macrophage cell surfaces, wherein it functions as a transferrin (Tf) receptor. The KD value for GAPDH–lactoferrin interaction was determined to be 43.8 nmol/L. Utilizing co-immunoprecipitation, immunoflorescence, and immunogold labelling electron microscopy we could demonstrate the trafficking of lactoferrin to the endosomal compartment along with GAPDH. We also found that upon iron depletion the binding of lactoferrin to macrophage cell surface is enhanced. This correlated with an increased expression of surface GAPDH, while other known lactoferrin receptors CD14 and lipoprotein receptor-related protein (LRP) were found to remain unaltered in expression levels. This suggests that upon iron depletion, cells prefer to use GAPDH to acquire lactoferrin. As GAPDH is an ubiquitously expressed molecule, its function as a receptor for lactoferrin may not be limited to macrophages.
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Affiliation(s)
- Pooja Rawat
- Institute of Microbial Technology, Council of Scientific and Industrial Research, Sector 39A, Chandigarh 160036, India
| | - Santosh Kumar
- Institute of Microbial Technology, Council of Scientific and Industrial Research, Sector 39A, Chandigarh 160036, India
| | - Navdeep Sheokand
- Institute of Microbial Technology, Council of Scientific and Industrial Research, Sector 39A, Chandigarh 160036, India
| | - Chaaya Iyengar Raje
- National Institute of Pharmaceutical Education and Research, Phase X, Sector 67, SAS Nagar, Punjab 160067, India
| | - Manoj Raje
- Institute of Microbial Technology, Council of Scientific and Industrial Research, Sector 39A, Chandigarh 160036, India
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Wang M, Li S, Zhang H, Pei L, Zou S, Lee FJS, Wang YT, Liu F. Direct interaction between GluR2 and GAPDH regulates AMPAR-mediated excitotoxicity. Mol Brain 2012; 5:13. [PMID: 22537872 PMCID: PMC3407747 DOI: 10.1186/1756-6606-5-13] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Accepted: 04/26/2012] [Indexed: 12/30/2022] Open
Abstract
Over-activation of AMPARs (α−amino-3-hydroxy-5-methylisoxazole-4-propionic acid subtype glutamate receptors) is implicated in excitotoxic neuronal death associated with acute brain insults, such as ischemic stroke. However, the specific molecular mechanism by which AMPARs, especially the calcium-impermeable AMPARs, induce neuronal death remains poorly understood. Here we report the identification of a previously unrecognized molecular pathway involving a direct protein-protein interaction that underlies GluR2-containing AMPAR-mediated excitotoxicity. Agonist stimulation of AMPARs promotes GluR2/GAPDH (glyceraldehyde-3-phosphate dehydrogenase) complex formation and subsequent internalization. Disruption of GluR2/GAPDH interaction by administration of an interfering peptide prevents AMPAR-mediated excitotoxicity and protects against damage induced by oxygen-glucose deprivation (OGD), an in vitro model of brain ischemia.
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Affiliation(s)
- Min Wang
- Department of Neuroscience, Centre for Addiction and Mental Health, Toronto, Canada
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Iwamoto A, Mitsuda K, Inoue A, Kato T, Inoue Y, Kawahara H. Purification and identification of an IgE suppressor from strawberry in an in vitro immunization system. Cytotechnology 2012; 64:309-14. [PMID: 22328134 DOI: 10.1007/s10616-012-9432-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 01/19/2012] [Indexed: 10/14/2022] Open
Abstract
We purified and identified an IgE suppressor from the strawberry 'Toyonoka', based on the decrease of IgE production in in vitro immunization (IVI). Gel filtration experiment indicated that fractions in a 15-48 kDa range and <10 kDa have an IgE suppressive activity. Furthermore, the fraction in 15-48 kDa was subjected to chromatofocusing and found to have activities at isoelectric points, pI 6.0, 7.0, and 8.0-9.2. We focused on the active fractions of pI 8.0-9.2 and the purified a large amount of strawberry extracts by cation exchange resins in batch. A purified 39 kDa protein showed homology to plant glyceraldehyde-3-phosphate dehydrogenase (GAPDH) in N-terminal amino acid sequence and had GAPDH enzymatic activity. Nucleotide sequence and deduced amino acid sequence of the obtained cDNA clone of the protein matched with the sequence of Fragaria x ananassa GAPDH in the GenBank with >98% identical nucleotides and >99% identical amino acids, respectively. The purified strawberry GAPDH suppressed total IgE production in IVI in a dose-dependent manner. From these results, we identified GAPDH as IgE suppressor in the strawberry. Our study may be applicable to the development of new methods to relieve allergic conditions using GAPDH and the screening of other functional factors for human health.
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Affiliation(s)
- Akira Iwamoto
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu, 808-0196, Fukuoka, Japan
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Torres-Bugeau CM, Ávila CL, Raisman-Vozari R, Papy-Garcia D, Itri R, Barbosa LRS, Cortez LM, Sim VL, Chehín RN. Characterization of heparin-induced glyceraldehyde-3-phosphate dehydrogenase early amyloid-like oligomers and their implication in α-synuclein aggregation. J Biol Chem 2011; 287:2398-409. [PMID: 22134915 DOI: 10.1074/jbc.m111.303503] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Lewy bodies and Lewy neurites, neuropathological hallmarks of several neurological diseases, are mainly made of filamentous assemblies of α-synuclein. However, other macromolecules including Tau, ubiquitin, glyceraldehyde-3-phosphate dehydrogenase, and glycosaminoglycans are routinely found associated with these amyloid deposits. Glyceraldehyde-3-phosphate dehydrogenase is a glycolytic enzyme that can form fibrillar aggregates in the presence of acidic membranes, but its role in Parkinson disease is still unknown. In this work, the ability of heparin to trigger the amyloid aggregation of this protein at physiological conditions of pH and temperature is demonstrated by infrared and fluorescence spectroscopy, dynamic light scattering, small angle x-ray scattering, circular dichroism, and fluorescence microscopy. Aggregation proceeds through the formation of short rod-like oligomers, which elongates in one dimension. Heparan sulfate was also capable of inducing glyceraldehyde-3-phosphate dehydrogenase aggregation, but chondroitin sulfates A, B, and C together with dextran sulfate had a negligible effect. Aided with molecular docking simulations, a putative binding site on the protein is proposed providing a rational explanation for the structural specificity of heparin and heparan sulfate. Finally, it is demonstrated that in vitro the early oligomers present in the glyceraldehyde-3-phosphate dehydrogenase fibrillation pathway promote α-synuclein aggregation. Taking into account the toxicity of α-synuclein prefibrillar species, the heparin-induced glyceraldehyde-3-phosphate dehydrogenase early oligomers might come in useful as a novel therapeutic strategy in Parkinson disease and other synucleinopathies.
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Characterization of glyceraldehyde-3-phosphate dehydrogenase as a novel transferrin receptor. Int J Biochem Cell Biol 2011; 44:189-99. [PMID: 22062951 DOI: 10.1016/j.biocel.2011.10.016] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 10/01/2011] [Accepted: 10/05/2011] [Indexed: 11/21/2022]
Abstract
A majority of cells obtain of transferrin (Tf) bound iron via transferrin receptor 1 (TfR1) or by transferrin receptor 2 (TfR2) in hepatocytes. Our study establishes that cells are capable of acquiring transferrin iron by an alternate pathway via GAPDH. These findings demonstrate that upon iron depletion, GAPDH functions as a preferred receptor for transferrin rather than TfR1 in some but not all cell types. We utilized CHO-TRVb cells that do not express TfR1 or TfR2 as a model system. A knockdown of GAPDH in these cells resulted in a decrease of not only transferrin binding but also associated iron uptake. The current study also demonstrates that, unlike TfR1 and TfR2 which are localized to a specific membrane fraction, GAPDH is located in both the detergent soluble and lipid raft fractions of the cell membrane. Further, transferrin uptake by GAPDH occurs by more than one mechanism namely clathrin mediated endocytosis, lipid raft endocytosis and macropinocytosis. By determining the kinetics of this pathway it appears that GAPDH-Tf uptake is a low affinity, high capacity, recycling pathway wherein transferrin is catabolised. Our findings provide an explanation for the detailed role of GAPDH mediated transferrin uptake as an alternate route by which cells acquire iron.
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Ogawa M, Yamaji R, Higashimura Y, Harada N, Ashida H, Nakano Y, Inui H. 17β-estradiol represses myogenic differentiation by increasing ubiquitin-specific peptidase 19 through estrogen receptor α. J Biol Chem 2011; 286:41455-41465. [PMID: 21971047 DOI: 10.1074/jbc.m111.276824] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Skeletal muscles express estrogen receptor (ER) α and ERβ. However, the roles of estrogens acting through the ERs in skeletal muscles remain unclear. The effects of 17β-estradiol (E2) on myogenesis were studied in C2C12 myoblasts. E2 and an ERα-selective agonist propylpyrazole-triol depressed myosin heavy chain (MHC), tropomyosin, and myogenin levels and repressed the fusion of myoblasts into myotubes. ER antagonist ICI 182,780 cancelled E2-repressed myogenesis. E2 induced ubiquitin-specific peptidase 19 (USP19) expression during myogenesis. E2 replacement increased USP19 expression in the gastrocnemius and soleus muscles of ovariectomized mice. Knockdown of USP19 inhibited E2-repressed myogenesis. Mutant forms of USP19 lacking deubiquitinating activity increased MHC and tropomyosin levels. E2 decreased ubiquitinated proteins during myogenesis, and the E2-decreased ubiquitinated proteins were increased by knockdown of USP19. Propylpyrazole-triol increased USP19 expression, and ICI 182,780 inhibited E2-increased USP19 expression. Overexpression of ERα or knockdown of ERβ enhanced the effects of E2 on the levels of USP19, MHC, and tropomyosin, whereas knockdown of ERα, overexpression of ERβ, or an ERβ-selective agonist diarylpropionitrile abolished their effects. A mutant form of ERα that is constitutively localized in the nucleus increased USP19 expression and decreased MHC and tropomyosin expression in the presence of E2. Furthermore, in skeletal muscle satellite cells, E2 inhibited myogenesis and increased USP19 expression, and diarylpropionitrile repressed E2-increased USP19 expression. These results demonstrate that (i) E2 induces USP19 expression through nuclear ERα, (ii) increased USP19-mediated deubiquitinating activity represses myogenesis, and (iii) ERβ inhibits ERα-activated USP19 expression.
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Affiliation(s)
- Masahiro Ogawa
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531
| | - Ryoichi Yamaji
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531.
| | - Yasuki Higashimura
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531
| | - Naoki Harada
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531
| | - Hitoshi Ashida
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo 657-8501
| | | | - Hiroshi Inui
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531
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Up-regulation of glyceraldehyde-3-phosphate dehydrogenase gene expression by HIF-1 activity depending on Sp1 in hypoxic breast cancer cells. Arch Biochem Biophys 2011; 509:1-8. [DOI: 10.1016/j.abb.2011.02.011] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 01/26/2011] [Accepted: 02/13/2011] [Indexed: 11/22/2022]
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Makhina T, Loers G, Schulze C, Ueberle B, Schachner M, Kleene R. Extracellular GAPDH binds to L1 and enhances neurite outgrowth. Mol Cell Neurosci 2009; 41:206-18. [PMID: 19285135 DOI: 10.1016/j.mcn.2009.02.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 12/08/2008] [Accepted: 02/26/2009] [Indexed: 10/21/2022] Open
Abstract
We have identified glyceraldehyde-3-phosphate dehydrogenase (GAPDH) as a binding partner for the cell adhesion molecule L1. GAPDH binds to sites within the extracellular domain of L1, namely the immunoglobulin-like domains I-VI and the fibronectin type III homologous repeats 4-5. Extracellular GAPDH was detected at the cell surface of neuronal cells by surface biotinylation and immunocytochemistry. Addition of GAPDH antibodies to cultured cerebellar neurons inhibited L1-dependent neurite outgrowth in the presence of ATP, while the application of exogenous GAPDH promoted L1-dependent neurite outgrowth. Pre-treatment of substrate-coated L1-Fc with ATP and GAPDH, which phosphorylates L1, subsequently led to an enhanced neurite outgrowth. Furthermore, aggregation of L1-Fc carrying beads was enhanced in the presence of both GAPDH and ATP. L1-dependent neurite outgrowth and aggregation of L1 were diminished in the presence of alkaline phosphatase or a protein kinase inhibitor. Our results show that GAPDH-dependent phosphorylation of L1 is a novel mechanism in regulating L1-mediated neurite outgrowth.
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Affiliation(s)
- Tatjana Makhina
- Zentrum für Molekulare Neurobiologie, Universität Hamburg, Martinistrasse 52, 20246 Hamburg, Germany
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Hittel DS, Berggren JR, Shearer J, Boyle K, Houmard JA. Increased secretion and expression of myostatin in skeletal muscle from extremely obese women. Diabetes 2009; 58:30-8. [PMID: 18835929 PMCID: PMC2606890 DOI: 10.2337/db08-0943] [Citation(s) in RCA: 220] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Obesity is associated with endocrine abnormalities that predict the progression of insulin resistance to type 2 diabetes. Because skeletal muscle has been shown to secrete proteins that could be used as biomarkers, we characterized the secreted protein profile of muscle cells derived from extremely obese (BMI 48.8 +/- 14.8 kg/m(2); homeostasis model assessment [HOMA] 3.6 +/- 1.0) relative to lean healthy subjects (BMI 25.7 +/- 3.2 kg/m(2); HOMA 0.8 +/- 0.2). RESEARCH DESIGN AND METHODS We hypothesized that skeletal muscle would secrete proteins that predict the severity of obesity. To test this hypothesis, we used a "bottom-up" experimental design using stable isotope labeling by amino acids in culture (SILAC) and liquid chromatography/mass spectometry/mass spectometry (LC-MS/MS) to both identify and quantify proteins secreted from cultured myotubes derived from extremely obese compared with healthy nonobese women. RESULTS Using SILAC, we discovered a 2.9-fold increase in the secretion of myostatin from extremely obese human myotubes. The increased secretion and biological activity of myostatin were validated by immunoblot (3.16 +/- 0.18, P < 0.01) and a myoblast proliferation assay using conditioned growth medium. Myostatin was subsequently shown to increase in skeletal muscle (23%, P < 0.05) and plasma (35%, P < 0.05) and to correlate (r(2) = 0.6, P < 0.05) with the severity of insulin resistance. CONCLUSIONS Myostatin is a potent antianabolic regulator of muscle mass that may also play a role in energy metabolism. These findings show that increased expression of myostatin in skeletal muscle with obesity and insulin resistance results in elevated circulating myostatin. This may contribute to systemic metabolic deterioration of skeletal muscle with the progression of insulin resistance to type 2 diabetes.
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Affiliation(s)
- Dustin S Hittel
- Human Performance Laboratory, Faculty of Kinesiology, Roger Jackson Center for Health and Wellness, University of Calgary, Calgary, Alberta, Canada.
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Ishii T, Mori T, Tanaka T, Mizuno D, Yamaji R, Kumazawa S, Nakayama T, Akagawa M. Covalent modification of proteins by green tea polyphenol (-)-epigallocatechin-3-gallate through autoxidation. Free Radic Biol Med 2008; 45:1384-94. [PMID: 18771724 DOI: 10.1016/j.freeradbiomed.2008.07.023] [Citation(s) in RCA: 185] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Revised: 07/25/2008] [Accepted: 07/29/2008] [Indexed: 10/21/2022]
Abstract
Green tea polyphenol (-)-epigallocatechin-3-gallate (EGCG) has various beneficial properties including chemopreventive, anticarcinogenic, and antioxidant actions. The interaction with proteins known as EGCG-binding targets may be related to the anticancer effects. However, the binding mechanisms for this activity remain poorly understood. Using mass spectrometry and chemical detection methods, we found that EGCG forms covalent adducts with cysteinyl thiol residues in proteins through autoxidation. To investigate the functional modulation caused by binding of EGCG, we examined the interaction between EGCG and a thiol enzyme, glyceraldehyde-3-phosphate dehydrogenase (GAPDH). Concentration-dependent covalent binding of EGCG to GAPDH was found to be coupled to the irreversible inhibition of GAPDH activity. Mutation experiments revealed that EGCG is primarily bound to the cysteinyl thiol group of the active center, indicating that the irreversible inhibition of GAPDH is due to the covalent attachment of EGCG to the active-center cysteine. Moreover, using EGCG-treated cancer cells, we identified GAPDH as a target of EGCG covalent binding through specific interactions between catechols and aminophenyl boronate agarose resin. Based on these findings, we propose that the covalent modification of proteins by EGCG may be a novel pathway related to the biological activity of EGCG.
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Affiliation(s)
- Takeshi Ishii
- Department of Food and Nutritional Sciences and Global COE Program, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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