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Xie X, Yuan Y, Huang Y, Hong X, Hong S, Chen G, Chen Y, Lin Y, Lu W, Fu W, Wang L. Effects of COL1A1 and SYTL2 on inflammatory cell infiltration and poor extracellular matrix remodeling of the vascular wall in thoracic aortic aneurysm. Chin Med J (Engl) 2024; 137:1105-1114. [PMID: 37640670 PMCID: PMC11062686 DOI: 10.1097/cm9.0000000000002808] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Indexed: 08/31/2023] Open
Abstract
BACKGROUND Thoracic aortic aneurysm (TAA) is a fatal cardiovascular disease, the pathogenesis of which has not yet been clarified. This study aimed to identify and validate the diagnostic markers of TAA to provide a strong theoretical basis for developing new methods to prevent and treat this disease. METHODS Gene expression profiles of the GSE9106, GSE26155, and GSE155468 datasets were acquired from the Gene Expression Omnibus (GEO) database. Differentially expressed genes (DEGs) were identified using the "limma" package in R. Least absolute shrinkage and selection operator (LASSO), support vector machine-recursive feature elimination (SVM-RFE), random forest, and binary logistic regression analyses were used to screen the diagnostic marker genes. Single-sample gene set enrichment analysis (ssGSEA) was used to estimate immune cell infiltration in TAA. RESULTS A total of 16 DEGs were identified. The enrichment and functional correlation analyses showed that DEGs were mainly associated with inflammatory response pathways and collagen-related diseases. Collagen type I alpha 1 chain ( COL1A1 ) and synaptotagmin like 2 ( SYTL2 ) were identified as diagnostic marker genes with a high diagnostic value for TAA. The expression of COL1A1 and SYTL2 was considerably higher in TAA vascular wall tissues than in the corresponding normal tissues, and there were significant differences in the infiltration of immune cells between TAA and normal vascular wall tissues. Additionally, COL1A1 and SYTL2 expression were associated with the infiltration of immune cells in the vascular wall tissue. Single-cell analysis showed that COL1A1 in TAA was mainly derived from fibroblasts and SYTL2 mainly from cluster of differentiation (CD)8 + T cells. In addition, single-cell analysis indicated that fibroblasts and CD8 + T cells in TAA were significantly higher than those in normal arterial wall tissue. CONCLUSIONS COL1A1 and SYTL2 may serve as diagnostic marker genes for TAA. The upregulation of SYTL2 and COL1A1 may be involved in the inflammatory infiltration of the vessel wall and poor extracellular matrix remodeling, promoting the progression of TAA.
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Affiliation(s)
- Xinsheng Xie
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
| | - Ye Yuan
- Department of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Vascular Surgery Institute of Fudan University, Fudan University, Shanghai 200032, China
| | - Yulong Huang
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
| | - Xiang Hong
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
| | - Shichai Hong
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
| | - Gang Chen
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
| | - Yihui Chen
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
| | - Yue Lin
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
| | - Weifeng Lu
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
| | - Weiguo Fu
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
- Department of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Vascular Surgery Institute of Fudan University, Fudan University, Shanghai 200032, China
| | - Lixin Wang
- Department of Vascular Surgery, Zhongshan Hospital (Xiamen), Fudan University, Xiamen, Fujian 361015, China
- Department of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Vascular Surgery Institute of Fudan University, Fudan University, Shanghai 200032, China
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Ma S, Ming Y, Wu J, Cui G. Cellular metabolism regulates the differentiation and function of T-cell subsets. Cell Mol Immunol 2024; 21:419-435. [PMID: 38565887 PMCID: PMC11061161 DOI: 10.1038/s41423-024-01148-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 02/23/2024] [Indexed: 04/04/2024] Open
Abstract
T cells are an important component of adaptive immunity and protect the host from infectious diseases and cancers. However, uncontrolled T cell immunity may cause autoimmune disorders. In both situations, antigen-specific T cells undergo clonal expansion upon the engagement and activation of antigens. Cellular metabolism is reprogrammed to meet the increase in bioenergetic and biosynthetic demands associated with effector T cell expansion. Metabolites not only serve as building blocks or energy sources to fuel cell growth and expansion but also regulate a broad spectrum of cellular signals that instruct the differentiation of multiple T cell subsets. The realm of immunometabolism research is undergoing swift advancements. Encapsulating all the recent progress within this concise review in not possible. Instead, our objective is to provide a succinct introduction to this swiftly progressing research, concentrating on the metabolic intricacies of three pivotal nutrient classes-lipids, glucose, and amino acids-in T cells. We shed light on recent investigations elucidating the roles of these three groups of metabolites in mediating the metabolic and immune functions of T cells. Moreover, we delve into the prospect of "editing" metabolic pathways within T cells using pharmacological or genetic approaches, with the aim of synergizing this approach with existing immunotherapies and enhancing the efficacy of antitumor and antiinfection immune responses.
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Affiliation(s)
- Sicong Ma
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230601, China
| | - Yanan Ming
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230601, China
| | - Jingxia Wu
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230601, China.
| | - Guoliang Cui
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230601, China.
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Fu H, Vuononvirta J, Fanti S, Bonacina F, D'Amati A, Wang G, Poobalasingam T, Fankhaenel M, Lucchesi D, Coleby R, Tarussio D, Thorens B, Hearnden RJ, Longhi MP, Grevitt P, Sheikh MH, Solito E, Godinho SA, Bombardieri M, Smith DM, Cooper D, Iqbal AJ, Rathmell JC, Schaefer S, Morales V, Bianchi K, Norata GD, Marelli-Berg FM. The glucose transporter 2 regulates CD8 + T cell function via environment sensing. Nat Metab 2023; 5:1969-1985. [PMID: 37884694 PMCID: PMC10663157 DOI: 10.1038/s42255-023-00913-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 09/25/2023] [Indexed: 10/28/2023]
Abstract
T cell activation is associated with a profound and rapid metabolic response to meet increased energy demands for cell division, differentiation and development of effector function. Glucose uptake and engagement of the glycolytic pathway are major checkpoints for this event. Here we show that the low-affinity, concentration-dependent glucose transporter 2 (Glut2) regulates the development of CD8+ T cell effector responses in mice by promoting glucose uptake, glycolysis and glucose storage. Expression of Glut2 is modulated by environmental factors including glucose and oxygen availability and extracellular acidification. Glut2 is highly expressed by circulating, recently primed T cells, allowing efficient glucose uptake and storage. In glucose-deprived inflammatory environments, Glut2 becomes downregulated, thus preventing passive loss of intracellular glucose. Mechanistically, Glut2 expression is regulated by a combination of molecular interactions involving hypoxia-inducible factor-1 alpha, galectin-9 and stomatin. Finally, we show that human T cells also rely on this glucose transporter, thus providing a potential target for therapeutic immunomodulation.
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Affiliation(s)
- Hongmei Fu
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Juho Vuononvirta
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Silvia Fanti
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Fabrizia Bonacina
- Department of Pharmacological and Biomolecular Sciences (DisFeB), Università Degli Studi di Milano, Milan, Italy
| | - Antonio D'Amati
- Section of Anatomical Pathology Department of Precision and Regenerative Medicine, University of Bari Medical School, Bari, Italy
| | - Guosu Wang
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Thanushiyan Poobalasingam
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Maria Fankhaenel
- Bart's Cancer Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Davide Lucchesi
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Rachel Coleby
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - David Tarussio
- Faculty of Biology and Medicine, Center for Integrative Genomics, Génopode Building - UNIL Sorge, University of Lausanne, Lausanne, Switzerland
| | - Bernard Thorens
- Faculty of Biology and Medicine, Center for Integrative Genomics, Génopode Building - UNIL Sorge, University of Lausanne, Lausanne, Switzerland
| | - Robert J Hearnden
- Bart's Cancer Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - M Paula Longhi
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Paul Grevitt
- Bart's Cancer Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Madeeha H Sheikh
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Egle Solito
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Susana A Godinho
- Bart's Cancer Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Michele Bombardieri
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - David M Smith
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca, Cambridge, UK
| | - Dianne Cooper
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Asif J Iqbal
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Jeffrey C Rathmell
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Samuel Schaefer
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Valle Morales
- Bart's Cancer Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Katiuscia Bianchi
- Bart's Cancer Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Giuseppe Danilo Norata
- Department of Pharmacological and Biomolecular Sciences (DisFeB), Università Degli Studi di Milano, Milan, Italy
| | - Federica M Marelli-Berg
- William Harvey Research Institute, Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK.
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Reynolds MB, Hong HS, Michmerhuizen BC, Lawrence ALE, Zhang L, Knight JS, Lyssiotis CA, Abuaita BH, O’Riordan MX. Cardiolipin coordinates inflammatory metabolic reprogramming through regulation of Complex II disassembly and degradation. SCIENCE ADVANCES 2023; 9:eade8701. [PMID: 36735777 PMCID: PMC9897665 DOI: 10.1126/sciadv.ade8701] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 12/30/2022] [Indexed: 05/15/2023]
Abstract
Macrophage metabolic plasticity enables repurposing of electron transport from energy generation to inflammation and host defense. Altered respiratory complex II function has been implicated in cancer, diabetes, and inflammation, but regulatory mechanisms are incompletely understood. Here, we show that macrophage inflammatory activation triggers Complex II disassembly and succinate dehydrogenase subunit B loss through sequestration and selective mitophagy. Mitochondrial fission supported lipopolysaccharide-stimulated succinate dehydrogenase subunit B degradation but not sequestration. We hypothesized that this Complex II regulatory mechanism might be coordinated by the mitochondrial phospholipid cardiolipin. Cardiolipin synthase knockdown prevented lipopolysaccharide-induced metabolic remodeling and Complex II disassembly, sequestration, and degradation. Cardiolipin-depleted macrophages were defective in lipopolysaccharide-induced pro-inflammatory cytokine production, a phenotype partially rescued by Complex II inhibition. Thus, cardiolipin acts as a critical organizer of inflammatory metabolic remodeling.
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Affiliation(s)
- Mack B. Reynolds
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Hanna S. Hong
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Britton C Michmerhuizen
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Anna-Lisa E. Lawrence
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Li Zhang
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Jason S. Knight
- Department of Internal Medicine, Division of Rheumatology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Costas A. Lyssiotis
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Basel H. Abuaita
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Mary X. O’Riordan
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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5
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Expression pattern of Stomatin-domain proteins in the peripheral olfactory system. Sci Rep 2022; 12:11447. [PMID: 35794236 PMCID: PMC9259621 DOI: 10.1038/s41598-022-15572-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 06/27/2022] [Indexed: 11/29/2022] Open
Abstract
Recent data show that Stomatin-like protein 3 (STOML3), a member of the stomatin-domain family, is expressed in the olfactory sensory neurons (OSNs) where it modulates both spontaneous and evoked action potential firing. The protein family is constituted by other 4 members (besides STOML3): STOM, STOML1, STOML2 and podocin. Interestingly, STOML3 with STOM and STOML1 are expressed in other peripheral sensory neurons: dorsal root ganglia. In here, they functionally interact and modulate the activity of the mechanosensitive Piezo channels and members of the ASIC family. Therefore, we investigated whether STOM and STOML1 are expressed together with STOML3 in the OSNs and whether they could interact. We found that all three are indeed expressed in ONSs, although STOML1 at very low level. STOM and STOML3 share a similar expression pattern and STOML3 is necessary for STOM to properly localize to OSN cilia. In addition, we extended our investigation to podocin and STOML2, and while the former is not expressed in the olfactory system, the latter showed a peculiar expression pattern in multiple cell types. In summary, we provided a first complete description of stomatin-domain protein family in the olfactory system, highlighting the precise compartmentalization, possible interactions and, finally, their functional implications.
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6
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Ma W, Chen Y, Xiong W, Li W, Xu Z, Wang Y, Wei Z, Mou T, Wu Z, Cheng M, Zou Y, Zhu Y, Zhou W, Liu F, Geng Y. STOML2 interacts with PHB through activating MAPK signaling pathway to promote colorectal Cancer proliferation. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2021; 40:359. [PMID: 34781982 PMCID: PMC8591804 DOI: 10.1186/s13046-021-02116-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 09/24/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND Highly expressed STOML2 has been reported in a variety of cancers, yet few have detailed its function and regulatory mechanism. This research aims to reveal regulatory mechanism of STOML2 and to provide evidence for clinical therapeutics, via exploration of its role in colorectal cancer, and identification of its interacting protein. METHODS Expression level of STOML2 in normal colon and CRC tissue from biobank in Nanfang Hospital was detected by pathologic methods. The malignant proliferation of CRC induced by STOML2 was validated via gain-of-function and loss-of-function experiments, with novel techniques applied, such as organoid culture, orthotopic model and endoscopy monitoring. Yeast two-hybrid assay screened interacting proteins of STOML2, followed by bioinformatics analysis to predict biological function and signaling pathway of candidate proteins. Target protein with most functional similarity to STOML2 was validated with co-immunoprecipitation, and immunofluorescence were conducted to co-localize STOML2 and PHB. Pathway regulated by STOML2 was detected with immunoblotting, and subsequent experimental therapy was conducted with RAF inhibitor Sorafenib. RESULTS STOML2 was significantly overexpressed in colorectal cancer and its elevation was associated with unfavorable prognosis. Knockdown of STOML2 suppressed proliferation of colorectal cancer, thus attenuated subcutaneous and orthotopic tumor growth, while overexpressed STOML2 promoted proliferation in cell lines and organoids. A list of 13 interacting proteins was screened out by yeast two-hybrid assay. DTYMK and PHB were identified to be most similar to STOML2 according to bioinformatics in terms of biological process and signaling pathways; however, co-immunoprecipitation confirmed interaction between STOML2 and PHB, rather than DTYMK, despite its highest rank in previous analysis. Co-localization between STOML2 and PHB was confirmed in cell lines and tissue level. Furthermore, knockdown of STOML2 downregulated phosphorylation of RAF1, MEK1/2, and ERK1/2 on the MAPK signaling pathway, indicating common pathway activated by STOML2 and PHB in colorectal cancer proliferation. CONCLUSIONS This study demonstrated that in colorectal cancer, STOML2 expression is elevated and interacts with PHB through activating MAPK signaling pathway, to promote proliferation both in vitro and in vivo. In addition, combination of screening assay and bioinformatics marks great significance in methodology to explore regulatory mechanism of protein of interest.
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Affiliation(s)
- Wenhui Ma
- Department of Gastrointestinal Surgery, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), No. 1 Jiazi Road, Lunjiao, Shunde District, Foshan City, 528308, Guangdong Province, China.,Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China.,Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, China.,Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong, China
| | - Yuehong Chen
- Department of Gastrointestinal Surgery, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), No. 1 Jiazi Road, Lunjiao, Shunde District, Foshan City, 528308, Guangdong Province, China.,Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China.,Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, China.,Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong, China
| | - Wenjun Xiong
- Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China.,Department of Gastrointestinal Surgery, Guangdong Provincial Hospital of Chinese Medicine, the Second Affiliated Hospital of Guangzhou University of Chinese, Guangzhou, Guangdong, China
| | - Wenyi Li
- Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, China.,Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong, China
| | - Zhuoluo Xu
- Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China.,Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, China.,Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong, China
| | - Ying Wang
- Departments of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Zhigang Wei
- Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China
| | - Tingyu Mou
- Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China
| | - Zhaokun Wu
- Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China.,Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, China.,Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong, China
| | - Mingzhen Cheng
- Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, China.,Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong, China
| | - Yini Zou
- Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, China.,Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong, China
| | - Yu Zhu
- Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China
| | - Weijie Zhou
- Department of Gastrointestinal Surgery, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), No. 1 Jiazi Road, Lunjiao, Shunde District, Foshan City, 528308, Guangdong Province, China. .,Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China. .,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China. .,Department of Pathology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, Guangdong, China. .,Guangdong Provincial Key Laboratory of Molecular Tumor Pathology, Guangzhou, Guangdong, China.
| | - Feng Liu
- Departments of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China. .,Guangdong Provincial Key Laboratory of Precision Medicine for Gastrointestinal Tumor, Guangzhou, China. .,Department of Colorectal and Anal Surgery, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, 510180, Guangdong, China.
| | - Yan Geng
- Department of Gastrointestinal Surgery, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), No. 1 Jiazi Road, Lunjiao, Shunde District, Foshan City, 528308, Guangdong Province, China.
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Serricchio M, Bütikofer P. A Conserved Mitochondrial Chaperone-Protease Complex Involved in Protein Homeostasis. Front Mol Biosci 2021; 8:767088. [PMID: 34859054 PMCID: PMC8630662 DOI: 10.3389/fmolb.2021.767088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 10/25/2021] [Indexed: 11/29/2022] Open
Abstract
Mitochondria are essential organelles involved in cellular energy production. The inner mitochondrial membrane protein stomatin-like protein 2 (SLP-2) is a member of the SPFH (stomatin, prohibitin, flotilin, and HflK/C) superfamily and binds to the mitochondrial glycerophospholipid cardiolipin, forming cardiolipin-enriched membrane domains to promote the assembly and/or stabilization of protein complexes involved in oxidative phosphorylation. In addition, human SLP-2 anchors a mitochondrial processing complex required for proteolytic regulation of proteins involved in mitochondrial dynamics and quality control. We now show that deletion of the gene encoding the Trypanosoma brucei homolog TbSlp2 has no effect on respiratory protein complex stability and mitochondrial functions under normal culture conditions and is dispensable for growth of T. brucei parasites. In addition, we demonstrate that TbSlp2 binds to the metalloprotease TbYme1 and together they form a large mitochondrial protein complex. The two proteins negatively regulate each other's expression levels by accelerating protein turnover. Furthermore, we show that TbYme1 plays a role in heat-stress resistance, as TbYme1 knock-out parasites displayed mitochondrial fragmentation and loss of viability when cultured at elevated temperatures. Unbiased interaction studies uncovered putative TbYme1 substrates, some of which were differentially affected by the absence of TbYme1. Our results support emerging evidence for the presence of mitochondrial quality control pathways in this ancient eukaryote.
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Affiliation(s)
- Mauro Serricchio
- Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
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8
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The SPFH Protein Superfamily in Fungi: Impact on Mitochondrial Function and Implications in Virulence. Microorganisms 2021; 9:microorganisms9112287. [PMID: 34835412 PMCID: PMC8624314 DOI: 10.3390/microorganisms9112287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/28/2021] [Accepted: 11/01/2021] [Indexed: 11/17/2022] Open
Abstract
Integral membrane proteins from the ancient SPFH (stomatin, prohibitin, flotillin, HflK/HflC) protein superfamily are found in nearly all living organisms. Mammalian SPFH proteins are primarily associated with mitochondrial functions but also coordinate key processes such as ion transport, signaling, and mechanosensation. In addition, SPFH proteins are required for virulence in parasites. While mitochondrial functions of SPFH proteins are conserved in fungi, recent evidence has uncovered additional roles for SPFH proteins in filamentation and stress signaling. Inhibitors that target SPFH proteins have been successfully used in cancer and inflammation treatment. Thus, SPFH proteins may serve as a potential target for novel antifungal drug development. This review article surveys SPFH function in various fungal species with a special focus on the most common human fungal pathogen, Candida albicans.
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9
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Montes de Oca Balderas P. Mitochondria-plasma membrane interactions and communication. J Biol Chem 2021; 297:101164. [PMID: 34481840 PMCID: PMC8503596 DOI: 10.1016/j.jbc.2021.101164] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 08/24/2021] [Accepted: 09/01/2021] [Indexed: 11/28/2022] Open
Abstract
Mitochondria are known as the powerhouses of eukaryotic cells; however, they perform many other functions besides oxidative phosphorylation, including Ca2+ homeostasis, lipid metabolism, antiviral response, and apoptosis. Although other hypotheses exist, mitochondria are generally thought as descendants of an α-proteobacteria that adapted to the intracellular environment within an Asgard archaebacteria, which have been studied for decades as an organelle subdued by the eukaryotic cell. Nevertheless, several early electron microscopy observations hinted that some mitochondria establish specific interactions with certain plasma membrane (PM) domains in mammalian cells. Furthermore, recent findings have documented the direct physical and functional interaction of mitochondria and the PM, the organization of distinct complexes, and their communication through vesicular means. In yeast, some molecular players mediating this interaction have been elucidated, but only a few works have studied this interaction in mammalian cells. In addition, mitochondria can be translocated among cells through tunneling nanotubes or by other mechanisms, and free, intact, functional mitochondria have been reported in the blood plasma. Together, these findings challenge the conception of mitochondria as organelles subdued by the eukaryotic cell. This review discusses the evidence of the mitochondria interaction with the PM that has been long disregarded despite its importance in cell function, pathogenesis, and evolution. It also proposes a scheme of mitochondria–PM interactions with the intent to promote research and knowledge of this emerging pathway that promises to shift the current paradigms of cell biology.
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Affiliation(s)
- Pavel Montes de Oca Balderas
- Unidad de Neurobiología Dinámica, Department of Neurochemistry, Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico; Lab. BL-305, Instituto de Fisiología Celular, Department of Cognitive Neuroscience, Universidad Nacional Autónoma de México, Mexico City, Mexico.
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10
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Zheng Y, Huang C, Lu L, Yu K, Zhao J, Chen M, Liu L, Sun Q, Lin Z, Zheng J, Chen J, Zhang J. STOML2 potentiates metastasis of hepatocellular carcinoma by promoting PINK1-mediated mitophagy and regulates sensitivity to lenvatinib. J Hematol Oncol 2021; 14:16. [PMID: 33446239 PMCID: PMC7807703 DOI: 10.1186/s13045-020-01029-3] [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: 10/04/2020] [Accepted: 12/25/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Dysregulation of both mitochondrial biogenesis and mitophagy is critical to sustain oncogenic signaling pathways. However, the mechanism of mitophagy in promoting hepatocellular carcinoma (HCC) progression remains poorly understood. In this study, we investigated the clinical significance and biological involvement of mitochondrial inner membrane protein STOML2 in HCC. METHODS STOML2 was identified by gene expression profiles of HCC tissues and was measured in tissue microarray and cell lines. Gain/loss-of-function experiment was applied to study the biological function of STOML2 in HCC. Flow cytometry, Western blotting, laser confocal microscopy, transmission electron microscopy, and co-immunoprecipitation were used to detect and analyze mitophagy. ChIP and luciferase reporter assay were conducted to evaluate the relationship between STOML2 and HIF-1α. The sensitivity to lenvatinib was assessed in HCC both in vitro and in vivo. RESULTS Increased expression of STOML2 was found in HCC compared with paired peritumoral tissues. It was more significant in HCC with metastasis and correlated with worse overall survival and higher probability of recurrence after hepatectomy. Upregulation of STOML2 accelerated HCC cells colony formation, migration and invasion. Mechanically, TCGA dataset-based analysis showed enrichment of autophagy-related pathways in STOML2 highly-expressed HCC. Next, STOML2 was demonstrated to interact and stabilize PINK1 under cellular stress, amplify PINK1-Parkin-mediated mitophagy and then promote HCC growth and metastasis. Most interestingly, HIF-1α was upregulated and transcriptionally increased STOML2 expression in HCC cells under the treatment of lenvatinib. Furthermore, higher sensitivity to lenvatinib was found in HCC cells when STOML2 was downregulated. Combination therapy with lenvatinib and mitophagy inhibitor hydroxychloroquine obtained best efficacy. CONCLUSIONS Our findings suggested that STOML2 could amplify mitophagy through interacting and stabilizing PINK1, which promote HCC metastasis and modulate the response of HCC to lenvatinib. Combinations of pharmacologic inhibitors that concurrently block both angiogenesis and mitophagy may serve as an effective treatment for HCC.
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Affiliation(s)
- Yahui Zheng
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Chong Huang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Lu Lu
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Kangkang Yu
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Jing Zhao
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Mingquan Chen
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Lu Liu
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Qingfeng Sun
- Department of Infectious Diseases, Ruian People's Hospital, Ruian, 325200, China
| | - Zhifei Lin
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Jianming Zheng
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Jinhong Chen
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China.
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai, 200040, China.
| | - Jubo Zhang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China.
- Center of Liver Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China.
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11
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Montes de Oca Balderas P, Matus Núñez M, Picones A, Hernández-Cruz A. NMDAR in cultured astrocytes: Flux-independent pH sensor and flux-dependent regulator of mitochondria and plasma membrane-mitochondria bridging. FASEB J 2020; 34:16622-16644. [PMID: 33131132 DOI: 10.1096/fj.202001300r] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 09/28/2020] [Accepted: 10/13/2020] [Indexed: 01/21/2023]
Abstract
Glutamate N-methyl-D-aspartate (NMDA) receptor (NMDAR) is critical for neurotransmission as a Ca2+ channel. Nonetheless, flux-independent signaling has also been demonstrated. Astrocytes express NMDAR distinct from its neuronal counterpart, but cultured astrocytes have no electrophysiological response to NMDA. We recently demonstrated that in cultured astrocytes, NMDA at pH6 (NMDA/pH6) acting through the NMDAR elicits flux-independent Ca2+ release from the Endoplasmic Reticulum (ER) and depletes mitochondrial membrane potential (mΔΨ). Here we show that Ca2+ release is due to pH6 sensing by NMDAR, whereas mΔΨ depletion requires both: pH6 and flux-dependent NMDAR signaling. Plasma membrane (PM) NMDAR guard a non-random distribution relative to the ER and mitochondria. Also, NMDA/pH6 induces ER stress, endocytosis, PM electrical capacitance reduction, mitochondria-ER, and -nuclear contacts. Strikingly, it also produces the formation of PM invaginations near mitochondria along with structures referred to here as PM-mitochondrial bridges (PM-m-br). These and earlier data strongly suggest PM-mitochondria communication. As proof of the concept of mass transfer, we found that NMDA/pH6 provoked mitochondria labeling by the PM dye FM-4-64FX. NMDA/pH6 caused PM depolarization, cell acidification, and Ca2+ release from most mitochondria. Finally, the MCU and microtubules were not involved in mΔΨ depletion, while actin cytoskeleton was partially involved. These findings demonstrate that NMDAR has concomitant flux-independent and flux-dependent actions in cultured astrocytes.
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Affiliation(s)
- Pavel Montes de Oca Balderas
- Unidad de Neurobiología Dinámica, Department of Neurochemistry, Instituto Nacional de Neurología y Neurocirugía, México City, México.,Laboratorio Nacional de Canalopatías, Instituto de Fisiología Celular, Department of Cognitive Neuroscience, Universidad Nacional Autónoma de México, México City, México
| | - Mauricio Matus Núñez
- Laboratorio Nacional de Canalopatías, Instituto de Fisiología Celular, Department of Cognitive Neuroscience, Universidad Nacional Autónoma de México, México City, México
| | - Arturo Picones
- Laboratorio Nacional de Canalopatías, Instituto de Fisiología Celular, Department of Cognitive Neuroscience, Universidad Nacional Autónoma de México, México City, México
| | - Arturo Hernández-Cruz
- Laboratorio Nacional de Canalopatías, Instituto de Fisiología Celular, Department of Cognitive Neuroscience, Universidad Nacional Autónoma de México, México City, México
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12
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Zhang X, Li BY, Fu LJ, Adu-Gyamfi EA, Xu BR, Liu TH, Chen XM, Lan X, Wang YX, Xu HB, Ding YB. Stomatin-like protein 2 (SLP2) regulates the proliferation and invasion of trophoblast cells by modulating mitochondrial functions. Placenta 2020; 100:13-23. [PMID: 32814233 DOI: 10.1016/j.placenta.2020.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 06/01/2020] [Accepted: 07/08/2020] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Stomatin-like protein 2 (SLP2) is highly expressed in human first trimester trophoblast cells, but its functions in placental morpho-physiology remain unknown. This study aimed to determine the role of SLP2 in the proliferation and invasion of human first trimester trophoblast cells. METHODS Immunofluorescence was used to determine the expression and localization of SLP2 in normal and miscarriage human first trimester placenta. Western blot was used to determine the expression of SLP2, PCNA, Cyclin D3, N-cadherin, Vimentin, PGC1α and PPARα in HTR-8/SVneo cells. SLP2 was knocked down in the HTR-8/SVneo cells by using si-Slp2. Wound healing and migration assays were used to determine the effect of SLP2 knockdown on the migration and invasion in the HTR-8/SVneo cells. Mitochondrial membrane potential, reactive oxygen species (ROS), ATP production and biogenesis were measured to assess the effects of SLP2 knockdown on mitochondrial functions. RESULT SLP2 was strongly expressed in the cytotrophoblasts (CTB), syncytiotrophoblast (STB) and extravillous trophoblasts (EVT) of normal pregnancy placenta as compared to miscarriage placenta. SLP2 was highly expressed in the invasive EVT cell lines, HTR-8/SVneo and HPT-8 compared to the CTB cell line JAR. Knockdown of SLP2 significantly inhibited the migration and invasion of HTR-8/SVneo cells and placental villous explants, and repressed mitochondrial biogenesis and functions in HTR-8/SVneo cells. DISCUSSION Silencing of SLP2 inhibited the proliferation, migration and invasion of HTR-8/SVneo cells via the impairment of mitochondrial functions. This indicates that the downregulation of SLP2 in miscarriage placenta could be part of the pathogenesis and pathophysiology of the disease.
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Affiliation(s)
- Xue Zhang
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China; The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, PR China
| | - Bing-Yi Li
- Department of Obstetrics and Gyaanecology, the First Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, PR China; Wuhan Medical & Healthcare for Woman and Children, Wuhan, 430015, PR China
| | - Li-Juan Fu
- The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, PR China; School of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, PR China
| | - Enoch Appiah Adu-Gyamfi
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China
| | - Bai-Ruo Xu
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China
| | - Tai-Hang Liu
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China; The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, PR China
| | - Xue-Mei Chen
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China; The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, PR China
| | - Xi Lan
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China
| | - Ying-Xiong Wang
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China; The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, PR China
| | - Hong-Bing Xu
- Department of Obstetrics and Gyaanecology, the First Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, PR China.
| | - Yu-Bin Ding
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China; The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, PR China.
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13
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Ma W, Xu Z, Wang Y, Li W, Wei Z, Chen T, Mou T, Cheng M, Luo J, Luo T, Chen Y, Yu J, Zhou W, Li G. A Positive Feedback Loop of SLP2 Activates MAPK Signaling Pathway to Promote Gastric Cancer Progression. Am J Cancer Res 2018; 8:5744-5757. [PMID: 30555578 PMCID: PMC6276297 DOI: 10.7150/thno.28898] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/16/2018] [Indexed: 12/23/2022] Open
Abstract
Rationale: This study is to validate the clinicopathologic significance and potential prognostic value of SLP2 in gastric cancer (GC), to investigate the biological function and regulation mechanism of SLP2, and to explore potential therapeutic strategies for GC. Methods: The expression of SLP2 in GC tissues from two cohorts was examined by IHC. The biological function and regulation mechanism of SLP2 and PHB was validated via loss-of-function or gain-of-function experiments. In vitro proliferation detection was used to evaluate the therapeutic effects of Sorafenib. Results: We validated that SLP2 was significantly elevated in GC tissues and its elevation was associated with poor prognosis of patients. Loss of SLP2 drastically suppressed the proliferation of GC cells and inhibited the tumor growth, while SLP2 overexpression promoted the progression of GC. Mechanistically, SLP2 competed against E3 ubiquitin ligase SKP2 to bind with PHB and stabilized its expression. Loss of SLP2 significantly suppressed phosphorylation of Raf1, MEK1/2, ERK1/2 and ELK1. Furthermore, phosphorylated ELK1 could in turn activate transcription of SLP2. Finally, we demonstrated that a Raf1 inhibitor, Sorafenib, was sufficient to inhibit the proliferation of GC cells. Conclusion: Our findings demonstrated a positive feedback loop of SLP2 which leads to acceleration of tumor progression and poor survival of GC patients. This finding also provided evidence for the reason of SLP2 elevation. Moreover, we found that sorafenib might be a potential therapeutic drug for GC and disrupting the interaction between SLP2 and PHB might also serve as a potential therapeutic target in GC.
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14
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Ormonde JVS, Li Z, Stegen C, Madrenas J. TAOK3 Regulates Canonical TCR Signaling by Preventing Early SHP-1-Mediated Inactivation of LCK. THE JOURNAL OF IMMUNOLOGY 2018; 201:3431-3442. [PMID: 30373850 DOI: 10.4049/jimmunol.1800284] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 09/25/2018] [Indexed: 01/01/2023]
Abstract
Activation of LCK is required for canonical TCR signaling leading to T cell responses. LCK activation also initiates a negative feedback loop mediated by the phosphatase SHP-1 that turns off TCR signaling. In this article, we report that the thousand-and-one amino acid kinase 3 (TAOK3) is a key regulator of this feedback. TAOK3 is a serine/threonine kinase expressed in many different cell types including T cells. TAOK3-deficient human T cells had impaired LCK-dependent TCR signaling resulting in a defect in IL-2 response to canonical TCR signaling but not to bacterial superantigens, which use an LCK-independent pathway. This impairment was associated with enhanced interaction of LCK with SHP-1 after TCR engagement and rapid termination of TCR signals, a defect corrected by TAOK3 reconstitution. Thus, TAOK3 is a positive regulator of TCR signaling by preventing premature SHP-1-mediated inactivation of LCK. This mechanism may also regulate signaling by other Src family kinase-dependent receptors.
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Affiliation(s)
- João V S Ormonde
- Microbiome and Disease Tolerance Centre, Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada; and
| | - Zhigang Li
- Microbiome and Disease Tolerance Centre, Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada; and
| | - Camille Stegen
- Microbiome and Disease Tolerance Centre, Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada; and
| | - Joaquín Madrenas
- Microbiome and Disease Tolerance Centre, Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada; and .,Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA 90277
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15
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McDonald-Hyman C, Muller JT, Loschi M, Thangavelu G, Saha A, Kumari S, Reichenbach DK, Smith MJ, Zhang G, Koehn BH, Lin J, Mitchell JS, Fife BT, Panoskaltsis-Mortari A, Feser CJ, Kirchmeier AK, Osborn MJ, Hippen KL, Kelekar A, Serody JS, Turka LA, Munn DH, Chi H, Neubert TA, Dustin ML, Blazar BR. The vimentin intermediate filament network restrains regulatory T cell suppression of graft-versus-host disease. J Clin Invest 2018; 128:4604-4621. [PMID: 30106752 DOI: 10.1172/jci95713] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 07/26/2018] [Indexed: 01/04/2023] Open
Abstract
Regulatory T cells (Tregs) are critical for maintaining immune homeostasis. However, current Treg immunotherapies do not optimally treat inflammatory diseases in patients. Understanding the cellular processes that control Treg function may allow for the augmentation of therapeutic efficacy. In contrast to activated conventional T cells, in which protein kinase C-θ (PKC-θ) localizes to the contact point between T cells and antigen-presenting cells, in human and mouse Tregs, PKC-θ localizes to the opposite end of the cell in the distal pole complex (DPC). Here, using a phosphoproteomic screen, we identified the intermediate filament vimentin as a PKC-θ phospho target and show that vimentin forms a DPC superstructure on which PKC-θ accumulates. Treatment of mouse Tregs with either a clinically relevant PKC-θ inhibitor or vimentin siRNA disrupted vimentin and enhanced Treg metabolic and suppressive activity. Moreover, vimentin-disrupted mouse Tregs were significantly better than controls at suppressing alloreactive T cell priming in graft-versus-host disease (GVHD) and GVHD lethality, using a complete MHC-mismatch mouse model of acute GVHD (C57BL/6 donor into BALB/c host). Interestingly, vimentin disruption augmented the suppressor function of PKC-θ-deficient mouse Tregs. This suggests that enhanced Treg activity after PKC-θ inhibition is secondary to effects on vimentin, not just PKC-θ kinase activity inhibition. Our data demonstrate that vimentin is a key metabolic and functional controller of Treg activity and provide proof of principle that disruption of vimentin is a feasible, translationally relevant method to enhance Treg potency.
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Affiliation(s)
- Cameron McDonald-Hyman
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.,The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - James T Muller
- Skirball Institute of Biomolecular Medicine, and Department of Cell Biology, NYU School of Medicine, New York, New York, USA
| | - Michael Loschi
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.,The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Govindarajan Thangavelu
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.,The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Asim Saha
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.,The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Sudha Kumari
- Skirball Institute of Biomolecular Medicine, and Department of Cell Biology, NYU School of Medicine, New York, New York, USA
| | - Dawn K Reichenbach
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.,The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Michelle J Smith
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.,The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Guoan Zhang
- Skirball Institute of Biomolecular Medicine, and Department of Cell Biology, NYU School of Medicine, New York, New York, USA
| | - Brent H Koehn
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.,The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Jiqiang Lin
- Skirball Institute of Biomolecular Medicine, and Department of Cell Biology, NYU School of Medicine, New York, New York, USA
| | - Jason S Mitchell
- The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA.,Division of Rheumatology, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Brian T Fife
- The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA.,Division of Rheumatology, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Angela Panoskaltsis-Mortari
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA
| | - Colby J Feser
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA
| | - Andrew Kemal Kirchmeier
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA
| | - Mark J Osborn
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA
| | - Keli L Hippen
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA
| | - Ameeta Kelekar
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jonathan S Serody
- Lineberger Comprehensive Cancer Center, Division of Hematology/Oncology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Laurence A Turka
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - David H Munn
- Department of Pediatrics, Georgia Health Sciences University, Augusta, Georgia, USA
| | - Hongbo Chi
- Department of Immunology, Saint Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Thomas A Neubert
- Skirball Institute of Biomolecular Medicine, and Department of Cell Biology, NYU School of Medicine, New York, New York, USA
| | - Michael L Dustin
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Bruce R Blazar
- Division of Blood and Marrow Transplantation, Department of Pediatrics, Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.,The Center for Immunology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
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Interactome analysis of transforming growth factor-β-activated kinase 1 in Helicobacter pylori-infected cells revealed novel regulators tripartite motif 28 and CDC37. Oncotarget 2018; 9:14366-14381. [PMID: 29581850 PMCID: PMC5865676 DOI: 10.18632/oncotarget.24544] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 02/10/2018] [Indexed: 12/14/2022] Open
Abstract
Transforming growth factor-β (TGFβ)-activated kinase 1 (TAK1) plays a central role in controlling the cellular pro-inflammatory response via the activation of the nuclear factor κB (NF-κB)- and mitogen-activated protein (MAP) kinases-dependent transcriptional programs. Here, we show that depletion of TAK1 and the TAK1-binding proteins TAB1 and TAB2 affects NF-κB, JNK and p38 phosphorylation and suppresses NF-κB activity in AGS cells infected with Helicobacter pylori or stimulated with the cytokines TNF and IL-1β. To increase our understanding of TAK1 regulation and function, we performed mass spectrometry (MS)-based TAK1 interactomics. In addition to the identification of known and novel TAK1 interacting proteins, including TRIM28, CDC37 and STOML2, analysis of the MS data revealed various post-translational modifications within the TAK1/TAB complex. By applying siRNAs, TRIM28 and CDC37 were found to regulate phosphorylations of TAK1, IκB kinases IKKα/IKKβ and MAP kinases, NF-κB transactivation activity and IL-8 expression in the infected epithelial cells.
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Zi Xu YX, Ande SR, Mishra S. Prohibitin: A new player in immunometabolism and in linking obesity and inflammation with cancer. Cancer Lett 2018; 415:208-216. [DOI: 10.1016/j.canlet.2017.12.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 11/30/2017] [Accepted: 12/01/2017] [Indexed: 12/13/2022]
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18
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Feng Q, Hu ZY, Liu XQ, Zhang X, Lan X, Geng YQ, Chen XM, He JL, Wang YX, Ding YB. Stomatin-like protein 2 is involved in endometrial stromal cell proliferation and differentiation during decidualization in mice and humans. Reprod Biomed Online 2017; 34:191-202. [DOI: 10.1016/j.rbmo.2016.11.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 11/06/2016] [Accepted: 11/15/2016] [Indexed: 12/21/2022]
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19
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Abstract
Differences in mitochondrial structures determine the metabolic landscape of effector and memory T cell populations in vivo.
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20
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Ande SR, Nguyen KH, Nyomba BLG, Mishra S. Prohibitin in Adipose and Immune Functions. Trends Endocrinol Metab 2016; 27:531-541. [PMID: 27312736 DOI: 10.1016/j.tem.2016.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 05/11/2016] [Accepted: 05/17/2016] [Indexed: 12/17/2022]
Abstract
Prohibitin (PHB) was discovered in a quest to find genes with antiproliferative functions. However, the attribute of PHB that is responsible for its antiproliferative function remains elusive. Meanwhile, recent studies have established PHB as a pleiotropic protein with roles in metabolism, immunity, and senescence. PHB has cell compartment-specific functions, acting as a scaffolding protein in mitochondria, an adaptor molecule in membrane signaling, and a transcriptional coregulator in the nucleus. However, it remains unclear whether different functions and locations of PHB are interrelated or independent from each other, or if PHB works in a tissue-specific manner. Here, we discuss new findings on the role of PHB in adipose-immune interaction and an unexpected role in sex differences in adipose and immune functions.
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Affiliation(s)
- Sudharsana R Ande
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada
| | - K Hoa Nguyen
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada
| | | | - Suresh Mishra
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada; Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, Canada.
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21
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Chi H, Hu YH. Stomatin-like protein 2 of turbot Scopthalmus maximus: Gene cloning, expression profiling and immunoregulatory properties. FISH & SHELLFISH IMMUNOLOGY 2016; 49:436-441. [PMID: 26806162 DOI: 10.1016/j.fsi.2016.01.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Revised: 01/08/2016] [Accepted: 01/11/2016] [Indexed: 06/05/2023]
Abstract
Stomatin-like protein 2 (SLP-2) is a novel and unusual member of the stomatin gene superfamily. In this study, we obtained a full-length SLP-2 (SmSLP-2) cDNA from turbot (Scopthalmus maximus) spleen cDNA library. The cDNA sequence of SmSLP-2 contains a 5'-UTR of 107 bp, an ORF of 1050 bp, and a 3'-UTR of 959 bp. The ORF encodes a putative protein of 349 residues, which has a calculated molecular mass of 38.7 kDa. The SmSLP-2 protein possesses a prohibitin-homology (PHB) domain (residues 40 to 198) and shares 72.4-87.6% overall sequence identity with that of the teleost species. The highest expression of SmSLP-2 mRNA was found in the skin, followed by the head kidney, gut, spleen, liver, heart, gill and muscle. Moreover, both viral and bacterial pathogen infection resulted in the up-regulation of SmSLP-2 mRNA in the turbot head kidney and spleen in vivo. Subcellular localization analysis indicated that the SmSLP-2 proteins are mainly located in the peripheral membrane of ZF4 cells. This study also demonstrated that SmSLP-2 modulates IL-2 expression via active NFκB signaling pathway, and is possibly involved in host immune defense against bacterial and viral pathogens.
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Affiliation(s)
- Heng Chi
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Yong-Hua Hu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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Bartolome A, Boskovic S, Paunovic I, Bozic V, Cvejic D. Stomatin-like protein 2 overexpression in papillary thyroid carcinoma is significantly associated with high-risk clinicopathological parameters and BRAFV600E mutation. APMIS 2016; 124:271-7. [PMID: 26750533 DOI: 10.1111/apm.12505] [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: 10/09/2015] [Accepted: 12/02/2015] [Indexed: 11/29/2022]
Abstract
Stomatin-like protein 2 (SLP-2), a member of the stomatin protein family, has emerged as a potential molecular hallmark of tumor progression in several human malignancies. The aim of this study was to analyze SLP-2 expression pattern in benign and malignant thyroid tumors (n = 210) and to examine its relationship with clinicopathological parameters and BRAFV600E mutation in thyroid cancer. SLP-2 immunohistochemical expression was not detected in benign adenomas and was absent/weak in follicular and anaplastic carcinomas. High expression levels of SLP-2, found only in papillary thyroid carcinoma (PTC), particularly in the classical variant, were significantly associated with adverse clinicopathological parameters: lymph node metastasis (p = 0.002), extrathyroid invasion (p < 0.001), pT status (p < 0.001), and advanced tumor stage (p = 0.001). Additional genotyping of PTC cases for the BRAFV600E mutation revealed for the first time a close relation between SLP-2 overexpression and the presence of BRAF mutation (p = 0.02) with high positive rates of lymph node metastasis (70%) and extrathyroid invasion (80%) in these cases. The significant association of SLP-2 overexpression with unfavorable clinicopathological characteristics and BRAFV600E mutation indicates that SLP-2 may have a role in aggressiveness of BRAF-mutated PTC and that SLP-2 evaluation could be clinically useful in identification of high-risk PTC patients.
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Affiliation(s)
- Aleksandar Bartolome
- Institute for the Application of Nuclear Energy - INEP, University of Belgrade, Belgrade-Zemun, Serbia
| | - Srdjan Boskovic
- Institute for the Application of Nuclear Energy - INEP, University of Belgrade, Belgrade-Zemun, Serbia
| | - Ivan Paunovic
- Center for Endocrine Surgery, Institute for Endocrinology, Diabetes and Diseases of Metabolism, Clinical Center of Serbia, Belgrade, Serbia
| | - Vesna Bozic
- Department of Endocrine and Cardiovascular Pathology, Clinical Center of Serbia, Belgrade, Serbia
| | - Dubravka Cvejic
- Institute for the Application of Nuclear Energy - INEP, University of Belgrade, Belgrade-Zemun, Serbia
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23
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Ray S, Kassan A, Busija AR, Rangamani P, Patel HH. The plasma membrane as a capacitor for energy and metabolism. Am J Physiol Cell Physiol 2015; 310:C181-92. [PMID: 26771520 DOI: 10.1152/ajpcell.00087.2015] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
When considering which components of the cell are the most critical to function and physiology, we naturally focus on the nucleus, the mitochondria that regulate energy and apoptotic signaling, or other organelles such as the endoplasmic reticulum, Golgi, ribosomes, etc. Few people will suggest that the membrane is the most critical element of a cell in terms of function and physiology. Those that consider the membrane critical will point to its obvious barrier function regulated by the lipid bilayer and numerous ion channels that regulate homeostatic gradients. What becomes evident upon closer inspection is that not all membranes are created equal and that there are lipid-rich microdomains that serve as platforms of signaling and a means of communication with the intracellular environment. In this review, we explore the evolution of membranes, focus on lipid-rich microdomains, and advance the novel concept that membranes serve as "capacitors for energy and metabolism." Within this framework, the membrane then is the primary and critical regulator of stress and disease adaptation of the cell.
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Affiliation(s)
- Supriyo Ray
- Department of Veterans Affairs San Diego Healthcare System, San Diego, California; Department of Anesthesiology, University of California, San Diego, La Jolla, California; and
| | - Adam Kassan
- Department of Veterans Affairs San Diego Healthcare System, San Diego, California; Department of Anesthesiology, University of California, San Diego, La Jolla, California; and
| | - Anna R Busija
- Department of Veterans Affairs San Diego Healthcare System, San Diego, California; Department of Anesthesiology, University of California, San Diego, La Jolla, California; and
| | - Padmini Rangamani
- Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California
| | - Hemal H Patel
- Department of Veterans Affairs San Diego Healthcare System, San Diego, California; Department of Anesthesiology, University of California, San Diego, La Jolla, California; and
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24
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Shaikh S, Cox CD, Nomura T, Martinac B. Energetics of gating MscS by membrane tension in azolectin liposomes and giant spheroplasts. Channels (Austin) 2015; 8:321-6. [PMID: 24758942 DOI: 10.4161/chan.28366] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Mechanosensitive (MS) ion channels are molecular sensors that detect and transduce signals across prokaryotic and eukaryotic cell membranes arising from external mechanical stimuli or osmotic gradients. They play an integral role in mechanosensory responses including touch, hearing, and proprioception by opening or closing in order to facilitate or prevent the flow of ions and organic osmolytes. In this study we use a linear force model of MS channel gating to determine the gating membrane tension (γ) and the gating area change (ΔA) associated with the energetics of MscS channel gating in giant spheroplasts and azolectin liposomes. Analysis of Boltzmann distribution functions describing the dependence of MscS channel gating on membrane tension indicated that the gating area change (ΔA) was the same for MscS channels recorded in both preparations. The comparison of the membrane tension (γ) gating the channel, however, showed a significant difference between the MscS channel activities in these two preparations.
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25
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Chowdhury SM, Zhu X, Aloor JJ, Azzam KM, Gabor KA, Ge W, Addo KA, Tomer KB, Parks JS, Fessler MB. Proteomic Analysis of ABCA1-Null Macrophages Reveals a Role for Stomatin-Like Protein-2 in Raft Composition and Toll-Like Receptor Signaling. Mol Cell Proteomics 2015; 14:1859-70. [PMID: 25910759 DOI: 10.1074/mcp.m114.045179] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Indexed: 11/06/2022] Open
Abstract
Lipid raft membrane microdomains organize signaling by many prototypical receptors, including the Toll-like receptors (TLRs) of the innate immune system. Raft-localization of proteins is widely thought to be regulated by raft cholesterol levels, but this is largely on the basis of studies that have manipulated cell cholesterol using crude and poorly specific chemical tools, such as β-cyclodextrins. To date, there has been no proteome-scale investigation of whether endogenous regulators of intracellular cholesterol trafficking, such as the ATP binding cassette (ABC)A1 lipid efflux transporter, regulate targeting of proteins to rafts. Abca1(-/-) macrophages have cholesterol-laden rafts that have been reported to contain increased levels of select proteins, including TLR4, the lipopolysaccharide receptor. Here, using quantitative proteomic profiling, we identified 383 proteins in raft isolates from Abca1(+/+) and Abca1(-/-) macrophages. ABCA1 deletion induced wide-ranging changes to the raft proteome. Remarkably, many of these changes were similar to those seen in Abca1(+/+) macrophages after lipopolysaccharide exposure. Stomatin-like protein (SLP)-2, a member of the stomatin-prohibitin-flotillin-HflK/C family of membrane scaffolding proteins, was robustly and specifically increased in Abca1(-/-) rafts. Pursuing SLP-2 function, we found that rafts of SLP-2-silenced macrophages had markedly abnormal composition. SLP-2 silencing did not compromise ABCA1-dependent cholesterol efflux but reduced macrophage responsiveness to multiple TLR ligands. This was associated with reduced raft levels of the TLR co-receptor, CD14, and defective lipopolysaccharide-induced recruitment of the common TLR adaptor, MyD88, to rafts. Taken together, we show that the lipid transporter ABCA1 regulates the protein repertoire of rafts and identify SLP-2 as an ABCA1-dependent regulator of raft composition and of the innate immune response.
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Affiliation(s)
| | - Xuewei Zhu
- ¶Section on Molecular Medicine, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157
| | - Jim J Aloor
- From the ‡Laboratory of Respiratory Biology and
| | | | | | - William Ge
- From the ‡Laboratory of Respiratory Biology and
| | | | - Kenneth B Tomer
- §Laboratory of Structural Biology, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709
| | - John S Parks
- ¶Section on Molecular Medicine, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157
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26
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Salas S, Brulard C, Terrier P, Ranchere-Vince D, Neuville A, Guillou L, Lae M, Leroux A, Verola O, Jean-Emmanuel K, Bonvalot S, Blay JY, Le Cesne A, Aurias A, Coindre JM, Chibon F. Gene Expression Profiling of Desmoid Tumors by cDNA Microarrays and Correlation with Progression-Free Survival. Clin Cancer Res 2015; 21:4194-200. [DOI: 10.1158/1078-0432.ccr-14-2910] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 03/28/2015] [Indexed: 11/16/2022]
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Stomatin-like protein 2 is required for in vivo mitochondrial respiratory chain supercomplex formation and optimal cell function. Mol Cell Biol 2015; 35:1838-47. [PMID: 25776552 DOI: 10.1128/mcb.00047-15] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 03/05/2015] [Indexed: 11/20/2022] Open
Abstract
Stomatin-like protein 2 (SLP-2) is a mainly mitochondrial protein that is widely expressed and is highly conserved across evolution. We have previously shown that SLP-2 binds the mitochondrial lipid cardiolipin and interacts with prohibitin-1 and -2 to form specialized membrane microdomains in the mitochondrial inner membrane, which are associated with optimal mitochondrial respiration. To determine how SLP-2 functions, we performed bioenergetic analysis of primary T cells from T cell-selective Slp-2 knockout mice under conditions that forced energy production to come almost exclusively from oxidative phosphorylation. These cells had a phenotype characterized by increased uncoupled mitochondrial respiration and decreased mitochondrial membrane potential. Since formation of mitochondrial respiratory chain supercomplexes (RCS) may correlate with more efficient electron transfer during oxidative phosphorylation, we hypothesized that the defect in mitochondrial respiration in SLP-2-deficient T cells was due to deficient RCS formation. We found that in the absence of SLP-2, T cells had decreased levels and activities of complex I-III2 and I-III2-IV(1-3) RCS but no defects in assembly of individual respiratory complexes. Impaired RCS formation in SLP-2-deficient T cells correlated with significantly delayed T cell proliferation in response to activation under conditions of limiting glycolysis. Altogether, our findings identify SLP-2 as a key regulator of the formation of RCS in vivo and show that these supercomplexes are required for optimal cell function.
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Bonifaz LC, Cervantes-Silva MP, Ontiveros-Dotor E, López-Villegas EO, Sánchez-García FJ. A Role For Mitochondria In Antigen Processing And Presentation. Immunology 2014; 144:461-471. [PMID: 25251370 PMCID: PMC4557683 DOI: 10.1111/imm.12392] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 09/18/2014] [Accepted: 09/19/2014] [Indexed: 12/15/2022] Open
Abstract
Immune synapse formation is critical for T lymphocyte activation, and mitochondria have a role in this process, by localizing close to the immune synapse, regulating intracellular calcium concentration, and providing locally required ATP. The interaction between antigen presenting cells (APCs) and T lymphocytes is a two-way signaling process. However, the role of mitochondria in antigen presenting cells during this process remains unknown. For APCs to be able to activate T lymphocytes, they must first engage in an antigen-uptake, -processing, and -presentation process. Here we show that HEL-loaded B lymphocytes, as a type of APCs, undergo a small but significant mitochondrial depolarization by 1-2 h following antigen exposure thus suggesting an increase in their metabolic demands. Inhibition of ATP synthase (oligomycin) or mitochondrial Ca2+ uniporter (MCU) (Ruthenium red) had no effect on antigen uptake. Therefore, antigen processing and antigen presentation were further analyzed. Oligomycin treatment reduced the amount of specific MHC-peptide complexes but not total MHC II on the cell membrane of B lymphocytes which correlated with a decrease in antigen presentation. However, oligomycin also reduced antigen presentation by B lymphocytes that endogenously express HEL and by B lymphocytes loaded with the HEL48-62 peptide, although to a lesser extent. ATP synthase inhibition and MCU inhibition had a clear inhibitory effect on antigen processing (DQ-OVA). Taking together these results suggest that ATP synthase and MCU are relevant for antigen processing and presentation. Finally, APCs mitochondria were found to re-organize towards the APC-T immune synapse. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Laura C Bonifaz
- Unidad de Investigación Médica en Inmunoquímica, Hospital de especialidades, Instituto Mexicano del Seguro SocialMéxico, D.F., México
| | - Mariana P Cervantes-Silva
- Unidad de Investigación Médica en Inmunoquímica, Hospital de especialidades, Instituto Mexicano del Seguro SocialMéxico, D.F., México
- Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico NacionalMéxico, D.F., México
| | - Elizabeth Ontiveros-Dotor
- Unidad de Investigación Médica en Inmunoquímica, Hospital de especialidades, Instituto Mexicano del Seguro SocialMéxico, D.F., México
- Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico NacionalMéxico, D.F., México
| | - Edgar O López-Villegas
- Central de Microscopía, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico NacionalMéxico, D.F., México
| | - F Javier Sánchez-García
- Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico NacionalMéxico, D.F., México
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29
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Bao Y, Ledderose C, Seier T, Graf AF, Brix B, Chong E, Junger WG. Mitochondria regulate neutrophil activation by generating ATP for autocrine purinergic signaling. J Biol Chem 2014; 289:26794-26803. [PMID: 25104353 DOI: 10.1074/jbc.m114.572495] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Polymorphonuclear neutrophils (PMNs) form the first line of defense against invading microorganisms. We have shown previously that ATP release and autocrine purinergic signaling via P2Y2 receptors are essential for PMN activation. Here we show that mitochondria provide the ATP that initiates PMN activation. Stimulation of formyl peptide receptors increases the mitochondrial membrane potential (Δψm) and triggers a rapid burst of ATP release from PMNs. This burst of ATP release can be blocked by inhibitors of mitochondrial ATP production and requires an initial formyl peptide receptor-induced Ca(2+) signal that triggers mitochondrial activation. The burst of ATP release generated by the mitochondria fuels a first phase of purinergic signaling that boosts Ca(2+) signaling, amplifies mitochondrial ATP production, and initiates functional PMN responses. Cells then switch to glycolytic ATP production, which fuels a second round of purinergic signaling that sustains Ca(2+) signaling via P2X receptor-mediated Ca(2+) influx and maintains functional PMN responses such as oxidative burst, degranulation, and phagocytosis.
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Affiliation(s)
- Yi Bao
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215
| | - Carola Ledderose
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215
| | - Thomas Seier
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215,; Paracelsus Medical University, Salzburg A-5020, Austria, and
| | - Amelie F Graf
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215,; Paracelsus Medical University, Salzburg A-5020, Austria, and
| | - Bianca Brix
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215
| | - Eritza Chong
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215
| | - Wolfgang G Junger
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215,; Ludwig Boltzmann Institute for Traumatology, Vienna A-1200, Austria.
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Forster F, Paster W, Supper V, Schatzlmaier P, Sunzenauer S, Ostler N, Saliba A, Eckerstorfer P, Britzen-Laurent N, Schütz G, Schmid JA, Zlabinger GJ, Naschberger E, Stürzl M, Stockinger H. Guanylate binding protein 1-mediated interaction of T cell antigen receptor signaling with the cytoskeleton. THE JOURNAL OF IMMUNOLOGY 2013; 192:771-81. [PMID: 24337748 DOI: 10.4049/jimmunol.1300377] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
GTPases act as important switches in many signaling events in cells. Although small and heterotrimeric G proteins are subjects of intensive studies, little is known about the large IFN-inducible GTPases. In this article, we show that the IFN-γ-inducible guanylate binding protein 1 (GBP-1) is a regulator of T cell activation. Silencing of GBP-1 leads to enhanced activation of early T cell Ag receptor/CD3 signaling molecules, including Lck, that is translated to higher IL-2 production. Mass spectrometry analyses showed that regulatory cytoskeletal proteins, like plastin-2 that bundles actin fibers and spectrin β-chain, brain 1 that links the plasma membrane to the actin cytoskeleton, are binding partners of GBP-1. The spectrin cytoskeleton influences cell spreading and surface expression of TCR/CD3 and the leukocyte phosphatase CD45. We found higher cell spreading and enhanced surface expression of TCR/CD3 and CD45 in GBP-1 silenced T cells that explain their enhanced TCR/CD3 signaling. We conclude that GBP-1 is a downstream processor of IFN-γ via which T cells regulate cytoskeleton-dependent cell functions.
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Affiliation(s)
- Florian Forster
- Molecular Immunology Unit, Institute for Hygiene and Applied Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
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31
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Liu Z, Yang Y, Zhang Y, Ye X, Wang L, Xu G. Stomatin-like protein 2 is associated with the clinicopathological features of human papillary thyroid cancer and is regulated by TGF-β in thyroid cancer cells. Oncol Rep 2013; 31:153-60. [PMID: 24190591 DOI: 10.3892/or.2013.2833] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 10/28/2013] [Indexed: 11/06/2022] Open
Abstract
Papillary thyroid cancer (PTC) accounts for 80-90% of all cases of thyroid malignancies. Stomatin-like protein 2 (SLP-2) is a novel member of the stomatin superfamily and is found in several types of human tumors. However, whether it is expressed in human PTC is unknown. In the present study, we aimed to explore the diagnostic value of SLP-2 in patients with PTC and to investigate whether SLP-2 expression is regulated by transforming growth factor-β (TGF-β), a cytokine which plays an important role in PTC tumorigenesis. A total of 107 patients consisting of 99 cases of classical and 8 cases of follicular variant PTC was examined. The expression of SLP-2 mRNA and protein was examined by immunohistochemistry (IHC) and qPCR, respectively. We found that SLP-2 was overexpressed in human PTC. The expression of SLP-2 was significantly associated with clinicopathological features of the PTC cases. Particularly, increased SLP-2 expression was mainly correlated with primary tumors >1 cm in size, with late stage tumors and with metastatic lymph nodes. The expression of SLP-2 was correlated with the expression of Ki-67, a cell proliferation marker, in PTC tissues as detected by IHC. SLP-2 was upregulated by TGF-β1 in PTC cells as evaluated by western blotting. The present data revealed for the first time that patients with PTC exhibited SLP-2 overexpression that was associated with clinicopathological features. The correlation between SLP-2 expression and proliferation marker Ki-67 may be characteristic of PTC and may reflect PTC progression. SLP-2 was upregulated by TGF-β1, indicating a possible role of SLP-2 in PTC tumorigenesis. Our data suggest that SLP-2 may be considered as a useful diagnostic marker and therapeutic target for PTC.
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Affiliation(s)
- Zebing Liu
- Department of Pathology, Jinshan Hospital, Fudan University, Shanghai 201508, P.R. China
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32
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Martín-Cófreces NB, Baixauli F, Sánchez-Madrid F. Immune synapse: conductor of orchestrated organelle movement. Trends Cell Biol 2013; 24:61-72. [PMID: 24119664 DOI: 10.1016/j.tcb.2013.09.005] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 09/06/2013] [Accepted: 09/09/2013] [Indexed: 02/07/2023]
Abstract
To ensure proper cell function, intracellular organelles are not randomly distributed within the cell, but polarized and highly constrained by the cytoskeleton and associated adaptor proteins. This relationship between distribution and function was originally found in neurons and epithelial cells; however, recent evidence suggests that it is a general phenomenon occurring in many highly specialized cells including T lymphocytes. Recent studies reveal that the orchestrated redistribution of organelles is dependent on antigen-specific activation of and immune synapse (IS) formation by T cells. This review highlights the functional implications of organelle polarization in early T cell activation and examines recent findings on how the IS sets the rhythm of organelle motion and the spread of the activation signal to the nucleus.
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Affiliation(s)
- Noa Beatriz Martín-Cófreces
- Servicio de Inmunología, Hospital Universitario de la Princesa, UAM, IIS-IP, Madrid, Spain; Department of Vascular Biology and Inflammation, Fundación Centro Nacional de Investigaciones Cardiovasculares-Carlos III, Madrid, Spain
| | - Francesc Baixauli
- Servicio de Inmunología, Hospital Universitario de la Princesa, UAM, IIS-IP, Madrid, Spain; Department of Vascular Biology and Inflammation, Fundación Centro Nacional de Investigaciones Cardiovasculares-Carlos III, Madrid, Spain
| | - Francisco Sánchez-Madrid
- Servicio de Inmunología, Hospital Universitario de la Princesa, UAM, IIS-IP, Madrid, Spain; Department of Vascular Biology and Inflammation, Fundación Centro Nacional de Investigaciones Cardiovasculares-Carlos III, Madrid, Spain.
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Christie DA, Mitsopoulos P, Blagih J, Dunn SD, St-Pierre J, Jones RG, Hatch GM, Madrenas J. Stomatin-like Protein 2 Deficiency in T Cells Is Associated with Altered Mitochondrial Respiration and Defective CD4+T Cell Responses. THE JOURNAL OF IMMUNOLOGY 2012; 189:4349-60. [DOI: 10.4049/jimmunol.1103829] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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