1
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Timmins LR, Ortiz-Silva M, Joshi B, Li YL, Dickson FH, Wong TH, Vandevoorde KR, Nabi IR. Caveolin-1 promotes mitochondrial health and limits mitochondrial ROS through ROCK/AMPK regulation of basal mitophagic flux. FASEB J 2024; 38:e23343. [PMID: 38071602 DOI: 10.1096/fj.202201872rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 11/09/2023] [Accepted: 11/17/2023] [Indexed: 12/18/2023]
Abstract
Caveolin-1 (CAV1), the main structural component of caveolae, is phosphorylated at tyrosine-14 (pCAV1), regulates signal transduction, mechanotransduction, and mitochondrial function, and plays contrasting roles in cancer progression. We report that CRISPR/Cas9 knockout (KO) of CAV1 increases mitochondrial oxidative phosphorylation, increases mitochondrial potential, and reduces ROS in MDA-MB-231 triple-negative breast cancer cells. Supporting a role for pCAV1, these effects are reversed upon expression of CAV1 phosphomimetic CAV1 Y14D but not non-phosphorylatable CAV1 Y14F. pCAV1 is a known effector of Rho-associated kinase (ROCK) signaling and ROCK1/2 signaling mediates CAV1 promotion of increased mitochondrial potential and decreased ROS production in MDA-MB-231 cells. CAV1/ROCK control of mitochondrial potential and ROS is caveolae-independent as similar results were observed in PC3 prostate cancer cells lacking caveolae. Increased mitochondrial health and reduced ROS in CAV1 KO MDA-MB-231 cells were reversed by knockdown of the autophagy protein ATG5, mitophagy regulator PINK1 or the mitochondrial fission protein Drp1 and therefore due to mitophagy. Use of the mitoKeima mitophagy probe confirmed that CAV1 signaling through ROCK inhibited basal mitophagic flux. Activation of AMPK, a major mitochondrial homeostasis protein inhibited by ROCK, is inhibited by CAV1-ROCK signaling and mediates the increased mitochondrial potential, decreased ROS, and decreased basal mitophagy flux observed in wild-type MDA-MB-231 cells. CAV1 regulation of mitochondrial health and ROS in cancer cells therefore occurs via ROCK-dependent inhibition of AMPK. This study therefore links pCAV1 signaling activity at the plasma membrane with its regulation of mitochondrial activity and cancer cell metabolism through control of mitophagy.
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Affiliation(s)
- Logan R Timmins
- Department of Cellular & Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Milene Ortiz-Silva
- Department of Cellular & Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Bharat Joshi
- Department of Cellular & Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Y Lydia Li
- Department of Cellular & Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Fiona H Dickson
- Department of Cellular & Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Timothy H Wong
- Department of Cellular & Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kurt R Vandevoorde
- Department of Cellular & Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ivan R Nabi
- Department of Cellular & Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, British Columbia, Canada
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2
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Cade BE, Gharib SA. Breath of Fresh Air: Toward Unraveling the Molecular Underpinnings of Sleep Apnea. Am J Respir Crit Care Med 2022; 206:1450-1451. [PMID: 35944212 PMCID: PMC9757082 DOI: 10.1164/rccm.202207-1410ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Brian E. Cade
- Division of Sleep and Circadian DisordersBrigham and Women’s HospitalBoston, Massachusetts,Division of Sleep MedicineHarvard Medical SchoolBoston, Massachusetts
| | - Sina A. Gharib
- Division of Pulmonary, Critical Care, and Sleep MedicineUniversity of WashingtonSeattle, Washington
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3
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Ilha M, Meira Martins LA, da Silveira Moraes K, Dias CK, Thomé MP, Petry F, Rohden F, Borojevic R, Trindade VMT, Klamt F, Barbé‐Tuana F, Lenz G, Guma FCR. Caveolin-1 influences mitochondrial plasticity and function in hepatic stellate cell activation. Cell Biol Int 2022; 46:1787-1800. [PMID: 35971753 PMCID: PMC9804617 DOI: 10.1002/cbin.11876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 03/21/2022] [Accepted: 05/26/2022] [Indexed: 01/05/2023]
Abstract
Caveolin-1 (Cav-1) is an integral membrane protein present in all organelles, responsible for regulating and integrating multiple signals as a platform. Mitochondria are extremely adaptable to external cues in chronic liver diseases, and expression of Cav-1 may affect mitochondrial flexibility in hepatic stellate cells (HSCs) activation. We previously demonstrated that exogenous expression of Cav-1 was sufficient to increase some classical markers of activation in HSCs. Here, we aimed to evaluate the influence of exogenous expression and knockdown of Cav-1 on regulating the mitochondrial plasticity, metabolism, endoplasmic reticulum (ER)-mitochondria distance, and lysosomal activity in HSCs. To characterize the mitochondrial, lysosomal morphology, and ER-mitochondria distance, we perform transmission electron microscope analysis. We accessed mitochondria and lysosomal networks and functions through a confocal microscope and flow cytometry. The expression of mitochondrial machinery fusion/fission genes was examined by real-time polymerase chain reaction. Total and mitochondrial cholesterol content was measured using Amplex Red. To define energy metabolism, we used the Oroboros system in the cells. We report that GRX cells with exogenous expression or knockdown of Cav-1 changed mitochondrial morphometric parameters, OXPHOS metabolism, ER-mitochondria distance, lysosomal activity, and may change the activation state of HSC. This study highlights that Cav-1 may modulate mitochondrial function and structural reorganization in HSC activation, being a potential candidate marker for chronic liver diseases and a molecular target for therapeutic intervention.
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Affiliation(s)
- Mariana Ilha
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil,Department of Clinical Nutrition, Institute of Public Health and Clinical NutritionUniversity of Eastern FinlandKuopioFinland
| | - Leo A. Meira Martins
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil,Departamento de Fisiologia, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Ketlen da Silveira Moraes
- Departamento de Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Camila K. Dias
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil
| | - Marcos P. Thomé
- Departamento de Biofísica e Centro de BiotecnologiaUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Fernanda Petry
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil
| | - Francieli Rohden
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil
| | - Radovan Borojevic
- Centro de Medicina RegenerativaFaculdade Arthur Sa Earp Neto ‐ Faculdade de Medicina de PetrópolisRio de JaneiroBrasil
| | - Vera M. T. Trindade
- Departamento de Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Fábio Klamt
- Departamento de Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Florência Barbé‐Tuana
- Programa de Pós‐Graduação em Biologia Celular e MolecularEscola de Ciências da Pontifícia Universidade Católica do Rio Grande do Sul‐ PUCRSPorto AlegreRio Grande do SulBrasil
| | - Guido Lenz
- Departamento de Biofísica e Centro de BiotecnologiaUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Fátima C. R. Guma
- Departamento de Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil,Centro de Microscopia e MicroanáliseUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
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4
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Xiao Q, Zhao W, Wu C, Wang X, Chen J, Shi X, Sha S, Li J, Liang X, Yang Y, Guo H, Wang Y, Fan J. Lemon-Derived Extracellular Vesicles Nanodrugs Enable to Efficiently Overcome Cancer Multidrug Resistance by Endocytosis-Triggered Energy Dissipation and Energy Production Reduction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105274. [PMID: 35187842 PMCID: PMC9284146 DOI: 10.1002/advs.202105274] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Indexed: 05/20/2023]
Abstract
Multidrug resistance remains a great challenge for cancer chemotherapy. Herein, a biomimetic drug delivery system based on lemon-derived extracellular vesicles (EVs) nanodrugs (marked with heparin-cRGD-EVs-doxorubicin (HRED)) is demonstrated, achieving highly efficient overcoming cancer multidrug resistance. The HRED is fabricated by modifying functional heparin-cRGD (HR) onto the surface of EVs and then by loading with doxorubicin (DOX). The obtained HRED enable to effectively enter DOX-resistant cancer cells by caveolin-mediated endocytosis (main), macropinocytosis (secondary), and clathrin-mediated endocytosis (last), exhibiting excellent cellular uptake capacity. The diversified endocytosis capacity of HRED can efficiently dissipate intracellular energy and meanwhile trigger downstream production reduction of adenosine triphosphate (ATP), leading to a significant reduction of drug efflux. Consequently, they show excellent anti-proliferation capacities to DOX-resistant ovarian cancer, ensuring the efficiently overcoming ovarian cancer multidrug resistance in vivo. The authors believe this strategy provides a new strategy by endocytosis triggered-energy dissipation and ATP production reduction to design drug delivery system for overcoming cancer multidrug resistance.
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Affiliation(s)
- Qian Xiao
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Wei Zhao
- Division of Vascular and Interventional RadiologyDepartment of General Surgery, Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong510515P. R. China
| | - Chentian Wu
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Xuejiao Wang
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Jianping Chen
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Xiubo Shi
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Suinan Sha
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Jinheng Li
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Xiaomei Liang
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Yulu Yang
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Haoyan Guo
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Ying Wang
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
| | - Jun‐Bing Fan
- Cancer Research InstituteExperimental Education/Administration CenterSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515P. R. China
- Department of Hepatobiliary Surgery IIZhujiang HospitalSouthern Medical UniversityGuangzhou510515P. R. China
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5
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Hönigova K, Navratil J, Peltanova B, Polanska HH, Raudenska M, Masarik M. Metabolic tricks of cancer cells. Biochim Biophys Acta Rev Cancer 2022; 1877:188705. [PMID: 35276232 DOI: 10.1016/j.bbcan.2022.188705] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 02/11/2022] [Accepted: 02/26/2022] [Indexed: 12/15/2022]
Abstract
One of the characteristics of cancer cells important for tumorigenesis is their metabolic plasticity. Indeed, in various stress conditions, cancer cells can reshape their metabolic pathways to support the increased energy request due to continuous growth and rapid proliferation. Moreover, selective pressures in the tumor microenvironment, such as hypoxia, acidosis, and competition for resources, force cancer cells to adapt by complete reorganization of their metabolism. In this review, we highlight the characteristics of cancer metabolism and discuss its clinical significance, since overcoming metabolic plasticity of cancer cells is a key objective of modern cancer therapeutics and a better understanding of metabolic reprogramming may lead to the identification of possible targets for cancer therapy.
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Affiliation(s)
- Katerina Hönigova
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic
| | - Jiri Navratil
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic
| | - Barbora Peltanova
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic; Department of Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic
| | - Hana Holcova Polanska
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic; Department of Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic
| | - Martina Raudenska
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic; Department of Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic
| | - Michal Masarik
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic; Department of Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00 Brno, Czech Republic; BIOCEV, First Faculty of Medicine, Charles University, Prumyslova 595, CZ-252 50 Vestec, Czech Republic.
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6
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N6-methyladenosine demethylase FTO promotes growth and metastasis of gastric cancer via m 6A modification of caveolin-1 and metabolic regulation of mitochondrial dynamics. Cell Death Dis 2022; 13:72. [PMID: 35064107 PMCID: PMC8782929 DOI: 10.1038/s41419-022-04503-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 12/05/2021] [Accepted: 12/30/2021] [Indexed: 12/19/2022]
Abstract
Gastric cancer (GC) is the fifth most common tumor and the third most deadly cancer worldwide. N6-methyladenosine (m6A) modification has been reported to play a regulatory role in human cancers. However, the exact role of m6A in GC remains largely unknown, and the dysregulation of m6A on mitochondrial metabolism has never been studied. In the present study, we demonstrated that FTO, a key demethylase for RNA m6A modification, was up-regulated in GC tissues, especially in tissues with liver metastasis. Functionally, FTO acted as a promoter for the proliferation and metastasis in GC. Moreover, FTO enhanced the degradation of caveolin-1 mRNA via its demethylation, which regulated the mitochondrial fission/fusion and metabolism. Collectively, our current findings provided some valuable insights into FTO-mediated m6A demethylation modification and could be used as a new strategy for more careful surveillance and aggressive therapeutic intervention.
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7
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Wang S, Ichinomiya T, Terada Y, Wang D, Patel HH, Head BP. Synapsin-Promoted Caveolin-1 Overexpression Maintains Mitochondrial Morphology and Function in PSAPP Alzheimer's Disease Mice. Cells 2021; 10:2487. [PMID: 34572135 PMCID: PMC8467690 DOI: 10.3390/cells10092487] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 09/15/2021] [Accepted: 09/17/2021] [Indexed: 02/03/2023] Open
Abstract
Mitochondrial dysfunction plays a pivotal role in the Alzheimer's Disease (AD) pathology. Disrupted mitochondrial dynamics (i.e., fusion/fission balance), which are essential for normal mitochondria structure and function, are documented in AD. Caveolin-1 (Cav-1), a membrane/lipid raft (MLR) scaffolding protein regulates metabolic pathways in several different cell types such as hepatocytes and cancer cells. Previously, we have shown decreased expression of Cav-1 in the hippocampus of 9-month (m) old PSAPP mice, while hippocampal overexpression of neuron-targeted Cav-1 using the synapsin promoter (i.e., SynCav1) preserved cognitive function, neuronal morphology, and synaptic ultrastructure in 9 and 12 m PSAPP mice. Considering the central role of energy production in maintaining normal neuronal and synaptic function and survival, the present study reveals that PSAPP mice exhibit disrupted mitochondrial distribution, morphometry, and respiration. In contrast, SynCav1 mitigates mitochondrial damage and loss and enhances mitochondrial respiration. Furthermore, by examining mitochondrial dynamics, we found that PSAPP mice showed a significant increase in the phosphorylation of mitochondrial dynamin-related GTPase protein (DRP1), resulting in excessive mitochondria fragmentation and dysfunction. In contrast, hippocampal delivery of SynCav1 significantly decreased p-DRP1 and augmented the level of the mitochondrial fusion protein, mitofusin1 (Mfn1) in PSAPP mice, a molecular event, which may mechanistically explain for the preserved balance of mitochondria fission/fusion and metabolic resilience in 12 m PSAPP-SynCav1 mice. Our data demonstrate the critical role for Cav-1 in maintaining normal mitochondrial morphology and function through affecting mitochondrial dynamics and explain a molecular and cellular mechanism underlying the previously reported neuroprotective and cognitive preservation induced by SynCav1 in PSAPP mouse model of AD.
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Affiliation(s)
- Shanshan Wang
- Veterans Affairs San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA 92161, USA; (S.W.); (T.I.); (Y.T.); (D.W.)
- Department of Anesthesia, University of California San Diego, San Diego, CA 92093, USA
| | - Taiga Ichinomiya
- Veterans Affairs San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA 92161, USA; (S.W.); (T.I.); (Y.T.); (D.W.)
- Department of Anesthesia, University of California San Diego, San Diego, CA 92093, USA
- Department of Anesthesiology and Intensive Care Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 8528501, Japan
| | - Yuki Terada
- Veterans Affairs San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA 92161, USA; (S.W.); (T.I.); (Y.T.); (D.W.)
- Department of Anesthesia, University of California San Diego, San Diego, CA 92093, USA
- Department of Anesthesiology, Nara Medical University, Kashihara 6348521, Japan
| | - Dongsheng Wang
- Veterans Affairs San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA 92161, USA; (S.W.); (T.I.); (Y.T.); (D.W.)
- Department of Anesthesia, University of California San Diego, San Diego, CA 92093, USA
| | - Hemal H. Patel
- Veterans Affairs San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA 92161, USA; (S.W.); (T.I.); (Y.T.); (D.W.)
- Department of Anesthesia, University of California San Diego, San Diego, CA 92093, USA
| | - Brian P. Head
- Veterans Affairs San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA 92161, USA; (S.W.); (T.I.); (Y.T.); (D.W.)
- Department of Anesthesia, University of California San Diego, San Diego, CA 92093, USA
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8
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Caveolin-1, a novel player in cognitive decline. Neurosci Biobehav Rev 2021; 129:95-106. [PMID: 34237390 DOI: 10.1016/j.neubiorev.2021.06.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 06/29/2021] [Indexed: 12/12/2022]
Abstract
Cognitive decline (CD), which related to vascular dementia, Alzheimer's disease, Parkinson's disease, Huntington's disease, amyotrophic lateral sclerosis and diabetes mellitus, is a growing health concern that has a great impact on the patients' quality of life. Although extensive efforts, the mechanisms of CD are still far from being clarified, not to mention the effective treatment and prevention strategies. Caveolin-1 (Cav-1), a trans-membrane protein, is a major component of the caveolae structure and scaffolding proteins. Recently, ample evidence depicts a strong correlation between Cav-1 and CD, however, the specific role of Cav-1 in CD has not been clearly examined and how they might be connected have yet to be identified. This review seeks to provide a comprehensive overview about how Cav-1 modulates pathogeneses of CD-associated diseases. In summary, Cav-1 can promote structural and functional plasticity of neurons, improve neurogenesis, relieve mitochondrial dysfunction, inhibit inflammation and suppress oxidative stress, which have shed light on the idea that Cav-1 may be an efficacious therapeutic target to treat CD.
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9
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Capera J, Pérez-Verdaguer M, Peruzzo R, Navarro-Pérez M, Martínez-Pinna J, Alberola-Die A, Morales A, Leanza L, Szabó I, Felipe A. A novel mitochondrial Kv1.3-caveolin axis controls cell survival and apoptosis. eLife 2021; 10:e69099. [PMID: 34196606 PMCID: PMC8248986 DOI: 10.7554/elife.69099] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/22/2021] [Indexed: 12/16/2022] Open
Abstract
The voltage-gated potassium channel Kv1.3 plays an apparent dual physiological role by participating in activation and proliferation of leukocytes as well as promoting apoptosis in several types of tumor cells. Therefore, Kv1.3 is considered a potential pharmacological target for immunodeficiency and cancer. Different cellular locations of Kv1.3, at the plasma membrane or the mitochondria, could be responsible for such duality. While plasma membrane Kv1.3 facilitates proliferation, the mitochondrial channel modulates apoptotic signaling. Several molecular determinants of Kv1.3 drive the channel to the cell surface, but no information is available about its mitochondrial targeting. Caveolins, which are able to modulate cell survival, participate in the plasma membrane targeting of Kv1.3. The channel, via a caveolin-binding domain (CDB), associates with caveolin 1 (Cav1), which localizes Kv1.3 to lipid raft membrane microdomains. The aim of our study was to understand the role of such interactions not only for channel targeting but also for cell survival in mammalian cells. By using a caveolin association-deficient channel (Kv1.3 CDBless), we demonstrate here that while the Kv1.3-Cav1 interaction is responsible for the channel localization in the plasma membrane, a lack of such interaction accumulates Kv1.3 in the mitochondria. Kv1.3 CDBless severely affects mitochondrial physiology and cell survival, indicating that a functional link of Kv1.3 with Cav1 within the mitochondria modulates the pro-apoptotic effects of the channel. Therefore, the balance exerted by these two complementary mechanisms fine-tune the physiological role of Kv1.3 during cell survival or apoptosis. Our data highlight an unexpected role for the mitochondrial caveolin-Kv1.3 axis during cell survival and apoptosis.
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Affiliation(s)
- Jesusa Capera
- Molecular Physiology Laboratory, Dpt. de Bioquímica i Biomedicina Molecular, Institut de Biomedicina (IBUB), Universitat de BarcelonaBarcelonaSpain
| | - Mireia Pérez-Verdaguer
- Molecular Physiology Laboratory, Dpt. de Bioquímica i Biomedicina Molecular, Institut de Biomedicina (IBUB), Universitat de BarcelonaBarcelonaSpain
| | | | - María Navarro-Pérez
- Molecular Physiology Laboratory, Dpt. de Bioquímica i Biomedicina Molecular, Institut de Biomedicina (IBUB), Universitat de BarcelonaBarcelonaSpain
| | - Juan Martínez-Pinna
- Dept de Fisiología, Genética y Microbiología, Universidad de AlicanteAlicanteSpain
| | - Armando Alberola-Die
- Dept de Fisiología, Genética y Microbiología, Universidad de AlicanteAlicanteSpain
| | - Andrés Morales
- Dept de Fisiología, Genética y Microbiología, Universidad de AlicanteAlicanteSpain
| | - Luigi Leanza
- Department of Biology, University of PadovaPadovaItaly
| | - Ildiko Szabó
- Department of Biology, University of PadovaPadovaItaly
| | - Antonio Felipe
- Molecular Physiology Laboratory, Dpt. de Bioquímica i Biomedicina Molecular, Institut de Biomedicina (IBUB), Universitat de BarcelonaBarcelonaSpain
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10
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Abstract
Cellular senescence is a feature of most somatic cells. It is characterized by an irreversible cell cycle arrest and by the ability to secrete a plethora of mediators of inflammation and growth factors, which can alter the senescent cell's microenvironment. Senescent cells accumulate in tissues over time and contribute to both aging and the development of age-associated diseases. Senescent cells have antagonistic pleiotropic roles in cancer. Given the inability of senescent cells to proliferate, cellular senescence is a powerful tumor suppressor mechanism in young individuals. However, accumulation of senescent stromal cells during aging can fuel cancer cell growth in virtue of their capacity to release factors that stimulate cell proliferation. Caveolin-1 is a structural protein component of caveolae, invaginations of the plasma membrane involved in a variety of cellular processes, including signal transduction. Mounting evidence over the last 10-15 years has demonstrated a central role of caveolin-1 in the development of a senescent phenotype and the regulation of both the anti-tumorigenic and pro-tumorigenic properties of cellular senescence. In this review, we discuss the cellular mechanisms and functions of caveolin-1 in the context of cellular senescence and their relevance to the biology of cancer.
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11
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Shah DS, Nisr RB, Stretton C, Krasteva-Christ G, Hundal HS. Caveolin-3 deficiency associated with the dystrophy P104L mutation impairs skeletal muscle mitochondrial form and function. J Cachexia Sarcopenia Muscle 2020; 11:838-858. [PMID: 32090499 PMCID: PMC7296273 DOI: 10.1002/jcsm.12541] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 11/22/2019] [Accepted: 01/07/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Caveolin-3 (Cav3) is the principal structural component of caveolae in skeletal muscle. Dominant pathogenic mutations in the Cav3 gene, such as the Limb Girdle Muscular Dystrophy-1C (LGMD1C) P104L mutation, result in substantial loss of Cav3 and myopathic changes characterized by muscle weakness and wasting. We hypothesize such myopathy may also be associated with disturbances in mitochondrial biology. Herein, we report studies assessing the effects of Cav3 deficiency on mitochondrial form and function in skeletal muscle cells. METHODS L6 myoblasts were stably transfected with Cav3P104L or expression of native Cav3 repressed by shRNA or CRISPR/Cas9 genome editing prior to performing fixed/live cell imaging of mitochondrial morphology, subcellular fractionation and immunoblotting, or analysis of real time mitochondrial respiration. Skeletal muscle from wild-type and Cav3-/- mice was processed for analysis of mitochondrial proteins by immunoblotting. RESULTS Caveolin-3 was detected in mitochondrial-enriched membranes isolated from mouse gastrocnemius muscle and L6 myoblasts. Expression of Cav3P104L in L6 myoblasts led to its targeting to the Golgi and loss of native Cav3 (>95%), including that associated with mitochondrial membranes. Cav3P104L reduced mitochondrial mass and induced fragmentation of the mitochondrial network that was associated with significant loss of proteins involved in mitochondrial biogenesis, respiration, morphology, and redox function [i.e. PGC1α, succinate dehyrdogenase (SDHA), ANT1, MFN2, OPA1, and MnSOD). Furthermore, Cav3P104L myoblasts exhibited increased mitochondrial cholesterol and loss of cardiolipin. Consistent with these changes, Cav3P104L expression reduced mitochondrial respiratory capacity and increased myocellular superoxide production. These morphological, biochemical, and functional mitochondrial changes were phenocopied in myoblasts in which Cav3 had been silenced/knocked-out using shRNA or CRISPR. Reduced mitochondrial mass, PGC1α, SDHA, ANT1, and MnSOD were also demonstrable in Cav3-/- mouse gastrocnemius. Strikingly, Cav3 re-expression in Cav3KO myoblasts restored its mitochondrial association and facilitated reformation of a tubular mitochondrial network. Significantly, re-expression also mitigated changes in mitochondrial superoxide, cholesterol, and cardiolipin content and recovered cellular respiratory capacity. CONCLUSIONS Our results identify Cav3 as an important regulator of mitochondrial homeostasis and reveal that Cav3 deficiency in muscle cells associated with the Cav3P104L mutation invokes major disturbances in mitochondrial respiration and energy status that may contribute to the pathology of LGMD1C.
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Affiliation(s)
- Dinesh S Shah
- Division of Cell Signalling and Immunology, Sir James Black Centre, School of Life Sciences, University of Dundee, Dundee, UK
| | - Raid B Nisr
- Division of Cell Signalling and Immunology, Sir James Black Centre, School of Life Sciences, University of Dundee, Dundee, UK
| | - Clare Stretton
- Division of Cell Signalling and Immunology, Sir James Black Centre, School of Life Sciences, University of Dundee, Dundee, UK
| | - Gabriela Krasteva-Christ
- Institute of Anatomy and Cell Biology, School of Medicine, Saarland University, Homburg, Germany
| | - Harinder S Hundal
- Division of Cell Signalling and Immunology, Sir James Black Centre, School of Life Sciences, University of Dundee, Dundee, UK
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12
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Raudenska M, Gumulec J, Balvan J, Masarik M. Caveolin-1 in oncogenic metabolic symbiosis. Int J Cancer 2020; 147:1793-1807. [PMID: 32196654 DOI: 10.1002/ijc.32987] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/28/2020] [Accepted: 03/16/2020] [Indexed: 12/18/2022]
Abstract
Metabolic phenotypes of cancer cells are heterogeneous and flexible as a tumor mass is a hurriedly evolving system capable of constant adaptation to oxygen and nutrient availability. The exact type of cancer metabolism arises from the combined effects of factors intrinsic to the cancer cells and factors proposed by the tumor microenvironment. As a result, a condition termed oncogenic metabolic symbiosis in which components of the tumor microenvironment (TME) promote tumor growth often occurs. Understanding how oncogenic metabolic symbiosis emerges and evolves is crucial for perceiving tumorigenesis. The process by which tumor cells reprogram their TME involves many mechanisms, including changes in intercellular communication, alterations in metabolic phenotypes of TME cells, and rearrangement of the extracellular matrix. It is possible that one molecule with a pleiotropic effect such as Caveolin-1 may affect many of these pathways. Here, we discuss the significance of Caveolin-1 in establishing metabolic symbiosis in TME.
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Affiliation(s)
- Martina Raudenska
- Department of Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jaromir Gumulec
- Department of Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Jan Balvan
- Department of Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Michal Masarik
- Department of Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,BIOCEV, First Faculty of Medicine, Charles University, Vestec, Czech Republic
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13
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Kulshrestha R, Singh H, Pandey A, Soundarya D, Jaggi AS, Ravi K. Differential expression of caveolin-1 during pathogenesis of combined pulmonary fibrosis and emphysema: Effect of phosphodiesterase-5 inhibitor. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165802. [PMID: 32311453 DOI: 10.1016/j.bbadis.2020.165802] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 03/20/2020] [Accepted: 04/13/2020] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Combined pulmonary fibrosis and emphysema (CPFE) is a relatively new entity within the spectrum of cigarette smoke induced lung disorders. Currently there is no consensus about its treatment. We hypothesized that caveolin-1 critically determines the parenchymal and vascular remodeling leading to the development of CPFE. We assessed the effect of therapeutic targeting of caveolin-1 in mesenchymal and endothelial cells by the phosphodiesterase-5 inhibitor, sildenafil. METHODS Male Wistar rats (n = 168) were exposed to; room air (control); bleomycin (7 U/kg), bleomycin+sildenafil (50 mg/kg/day P.O.), cigarette smoke (CS) (4 Gold Flake 69 mm/day), CS + sildenafil, CS + bleomycin, CS + bleomycin+sildenafil. Animals were euthanized at 8, 9, 11, 12 weeks and lung histopathological changes, collagen deposition, ROS, Xanthine oxidase, caveolin-1 determined. RESULTS Cigarette smoke causes progressive ROS accumulation, caveolin-1 up-regulation in alveolar epithelial cells, alveolar macrophages, peribronchiolar fibroblasts, endothelial and vascular smooth muscle cells, interstitial inflammation and emphysema. Sildenafil reduces oxidative stress, parenchymal caveolin-1 and attenuates emphysema caused by CS. Bleomycin increases lung ROS and downregulates caveolin-1 leading to fibroblast proliferation and fibrosis. Combined cigarette smoke and bleomycin exposure, results in differential caveolin-1 expression and heterogeneous parenchymal remodeling with alternating areas of emphysema and fibrosis. Increased caveolin-1 induces premature senescence of lung fibroblasts and emphysema. Decreased caveolin-1 is associated with propagation of EMT and fibrosis. Sildenafil attenuates the parenchymal remodeling however it is not effective in reducing VSMC hypertrophy in combined group. CONCLUSION CPFE is characterized by heterogenous parenchymal remodeling and differential caveolin-1 expression. Sildenafil therapy attenuates parenchymal pathologies in CPFE. Additional therapy is however needed for attenuating VSMC remodeling.
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Affiliation(s)
- R Kulshrestha
- Department of Pathology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India.
| | - H Singh
- Department of Pathology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
| | - A Pandey
- Department of Pathology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
| | - D Soundarya
- Department of Pathology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
| | - A S Jaggi
- Dept of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | - K Ravi
- Department of Physiology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
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14
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The caveolar-mitochondrial interface: regulation of cellular metabolism in physiology and pathophysiology. Biochem Soc Trans 2020; 48:165-177. [PMID: 32010944 DOI: 10.1042/bst20190388] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/09/2020] [Accepted: 01/10/2020] [Indexed: 12/15/2022]
Abstract
The plasma membrane is an important cellular organelle that is often overlooked in terms of a primary factor in regulating physiology and pathophysiology. There is emerging evidence to suggest that the plasma membrane serves a greater purpose than a simple barrier or transporter of ions. New paradigms suggest that the membrane serves as a critical bridge to connect extracellular to intracellular communication particularly to regulate energy and metabolism by forming physical and biochemical associations with intracellular organelles. This review will focus on the relationship of a particular membrane microdomain - caveolae - with mitochondria and the particular implication of this to physiology and pathophysiology.
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15
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Parkington HC, Siriwardhana ER, Coleman HA. Intracellular organelles; key regulators of myometrial activity. CURRENT OPINION IN PHYSIOLOGY 2020. [DOI: 10.1016/j.cophys.2019.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Joshi B, Pawling J, Shankar J, Pacholczyk K, Kim Y, Tran W, Meng F, Rahman AMA, Foster LJ, Leong HS, Dennis JW, Nabi IR. Caveolin-1 Y14 phosphorylation suppresses tumor growth while promoting invasion. Oncotarget 2019; 10:6668-6677. [PMID: 31803361 PMCID: PMC6877104 DOI: 10.18632/oncotarget.27313] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 10/26/2019] [Indexed: 01/07/2023] Open
Abstract
Caveolin-1 is a transmembrane protein with both tumor promoter and suppressor functions that remain poorly understood. Cav1 phosphorylation by Src kinase on tyrosine 14 is closely associated with focal adhesion dynamics and tumor cell migration, however the role of pCav1 in vivo in tumor progression remains poorly characterized. Herein, we expressed phosphomimetic Y14D, wild type, and non-phosphorylatable Y14F forms of Cav1 in MDA-MB-435 cancer cells. Expression of Cav1Y14D reduced cell proliferation and induced the TP53 tumor suppressor. Ectopic expression in MDA-MB-435 cells of Y14 phosphorylatable Cav1 was required for induction of TP53 in response to oxidative stress. Cav1Y14D promotes an apparent reversal of the Warburg effect and markedly inhibited tumor growth in vivo. However, Cav1 induced pseudopodial recruitment of glycolytic enzymes, and time-lapse intravital imaging showed increased invadopodia protrusion and extravasation into blood vessels for Cav1WT and Y14D but not for Y14F. Our results suggest that Cav1 Y14 phosphorylation levels play a role in the conflicting demands on metabolic resources associated with cancer cell proliferation versus motility.
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Affiliation(s)
- Bharat Joshi
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, Canada
| | - Judy Pawling
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Jay Shankar
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, Canada
| | - Karina Pacholczyk
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Yohan Kim
- Translational Prostate Cancer Research Group, London Regional Cancer Program, University of Western Ontario, London, Canada
| | - Wynn Tran
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, Canada
| | - Fanrui Meng
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, Canada
| | - Anas M Abdel Rahman
- Department of Genetics, King Faisal Specialist Hospital and Research Centre (KFSHRC), Riyadh, Saudi Arabia
| | - Leonard J Foster
- Centre for High-throughput Biology, University of British Columbia, Vancouver, Canada
| | - Hon S Leong
- Translational Prostate Cancer Research Group, London Regional Cancer Program, University of Western Ontario, London, Canada
| | - James W Dennis
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Ivan R Nabi
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, Canada
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17
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Ammonium lauryl sulfate-induced apoptotic cell death may be due to mitochondrial dysfunction triggered by caveolin-1. Toxicol In Vitro 2019; 57:132-142. [DOI: 10.1016/j.tiv.2019.02.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 01/23/2019] [Accepted: 02/25/2019] [Indexed: 11/22/2022]
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18
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Muid KA, Kimyon Ö, Reza SH, Karakaya HC, Koc A. Characterization of long living yeast deletion mutants that lack mitochondrial metabolism genes DSS1, PPA2 and AFG3. Gene 2019; 706:172-180. [PMID: 31082499 DOI: 10.1016/j.gene.2019.05.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 04/15/2019] [Accepted: 05/01/2019] [Indexed: 02/06/2023]
Abstract
Molecular mechanisms of aging and longevity are still mostly unknown. Mitochondria play central roles in cellular metabolism and aging. In this study, we identified three deletion mutants of mitochondrial metabolism genes (ppa2∆, dss1∆, and afg3∆) that live longer than wild-type cells. These long-lived cells harbored significantly decreased amount of mitochondrial DNA (mtDNA) and reactive oxygen species (ROS). Compared to the serpentine nature of wild-type mitochondria, a different dynamics and distribution pattern of mitochondria were observed in the mutants. Both young and old long-lived cells produced relatively low but adequate levels of ATP for cellular activities. The status of the retrograde signaling was checked by expression of CIT2 gene and found activated in long-lived mutants. The mutant cells were also profiled for their gene expression patterns, and genes that were differentially regulated were determined. All long-lived cells comprised similar pleiotropic phenotype regarding mitochondrial dynamics and functions. Thus, this study suggests that DSS1, PPA2, and AFG3 genes modulate the lifespan by altering the mitochondrial morphology and functions.
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Affiliation(s)
- K A Muid
- Izmir Institute of Technology, Department of Molecular Biology and Genetics, 35430 Urla, Izmir, Turkey
| | - Önder Kimyon
- Izmir Institute of Technology, Department of Molecular Biology and Genetics, 35430 Urla, Izmir, Turkey
| | - Shahadat Hasan Reza
- Izmir Institute of Technology, Department of Molecular Biology and Genetics, 35430 Urla, Izmir, Turkey
| | - Huseyin Caglar Karakaya
- Izmir Institute of Technology, Department of Molecular Biology and Genetics, 35430 Urla, Izmir, Turkey
| | - Ahmet Koc
- Izmir Institute of Technology, Department of Molecular Biology and Genetics, 35430 Urla, Izmir, Turkey; Inonu University, Medical School, Department of Medical Biology and Genetics, Battalgazi, Malatya, Turkey.
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19
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Huang Q, Zhong W, Hu Z, Tang X. A review of the role of cav-1 in neuropathology and neural recovery after ischemic stroke. J Neuroinflammation 2018; 15:348. [PMID: 30572925 PMCID: PMC6302517 DOI: 10.1186/s12974-018-1387-y] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/29/2018] [Indexed: 12/12/2022] Open
Abstract
Ischemic stroke starts a series of pathophysiological processes that cause brain injury. Caveolin-1 (cav-1) is an integrated protein and locates at the caveolar membrane. It has been demonstrated that cav-1 can protect blood–brain barrier (BBB) integrity by inhibiting matrix metalloproteases (MMPs) which degrade tight junction proteins. This article reviews recent developments in understanding the mechanisms underlying BBB dysfunction, neuroinflammation, and oxidative stress after ischemic stroke, and focuses on how cav-1 modulates a series of activities after ischemic stroke. In general, cav-1 reduces BBB permeability mainly by downregulating MMP9, reduces neuroinflammation through influencing cytokines and inflammatory cells, promotes nerve regeneration and angiogenesis via cav-1/VEGF pathway, reduces apoptosis, and reduces the damage mediated by oxidative stress. In addition, we also summarize some experimental results that are contrary to the above and explore possible reasons for these differences.
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Affiliation(s)
- Qianyi Huang
- Department of Neurology, The Second Xiangya Hospital, Central South University, Renmin Road 139#, Changsha, 410011, Hunan, China
| | - Wei Zhong
- Department of Neurology, The Second Xiangya Hospital, Central South University, Renmin Road 139#, Changsha, 410011, Hunan, China
| | - Zhiping Hu
- Department of Neurology, The Second Xiangya Hospital, Central South University, Renmin Road 139#, Changsha, 410011, Hunan, China
| | - Xiangqi Tang
- Department of Neurology, The Second Xiangya Hospital, Central South University, Renmin Road 139#, Changsha, 410011, Hunan, China.
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20
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Schilling JM, Head BP, Patel HH. Caveolins as Regulators of Stress Adaptation. Mol Pharmacol 2018; 93:277-285. [PMID: 29358220 DOI: 10.1124/mol.117.111237] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 01/19/2018] [Indexed: 12/21/2022] Open
Abstract
Caveolins have been recognized over the past few decades as key regulators of cell physiology. They are ubiquitously expressed and regulate a number of processes that ultimately impact efficiency of cellular processes. Though not critical to life, they are central to stress adaptation in a number of organs. The following review will focus specifically on the role of caveolin in stress adaptation in the heart, brain, and eye, three organs that are susceptible to acute and chronic stress and that show as well declining function with age. In addition, we consider some novel molecular mechanisms that may account for this stress adaptation and also offer potential to drive the future of caveolin research.
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Affiliation(s)
- Jan M Schilling
- Veterans Administration San Diego Healthcare System and Department of Anesthesiology, UCSD School of Medicine, San Diego, California
| | - Brian P Head
- Veterans Administration San Diego Healthcare System and Department of Anesthesiology, UCSD School of Medicine, San Diego, California
| | - Hemal H Patel
- Veterans Administration San Diego Healthcare System and Department of Anesthesiology, UCSD School of Medicine, San Diego, California
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21
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Caveolin-1: An Oxidative Stress-Related Target for Cancer Prevention. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:7454031. [PMID: 28546853 PMCID: PMC5436035 DOI: 10.1155/2017/7454031] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 01/23/2017] [Accepted: 03/07/2017] [Indexed: 01/19/2023]
Abstract
Aberrant oxidative metabolism is one of the hallmarks of cancer. Reactive species overproduction could promote carcinogenesis via inducing genetic mutations and activating oncogenic pathways, and thus, antioxidant therapy was considered as an important strategy for cancer prevention and treatment. Caveolin-1 (Cav-1), a constituent protein of caveolae, has been shown to mediate tumorigenesis and progression through oxidative stress modulation recently. Reactive species could modulate the expression, degradation, posttranslational modifications, and membrane trafficking of Cav-1, while Cav-1-targeted treatments could scavenge the reactive species. More importantly, emerging evidences have indicated that multiple antioxidants could exert antitumor activities in cancer cells and protective activities in normal cells by modulating the Cav-1 pathway. Altogether, these findings indicate that Cav-1 may be a promising oxidative stress-related target for cancer antioxidant prevention. Elucidating the underlying interaction mechanisms between oxidative stress and Cav-1 is helpful for enhancing the preventive effects of antioxidants on cancer, for improving clinical outcomes of antioxidant-related therapeutics in cancer patients, and for developing Cav-1 targeted drugs. Herein, we summarize the available evidence of the roles of Cav-1 and oxidative stress in tumorigenesis and development and shed novel light on designing strategies for cancer prevention or treatment by utilizing the interaction mode between Cav-1 and oxidative stress.
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MicroRNAs miR-203-3p, miR-664-3p and miR-708-5p are associated with median strain lifespan in mice. Sci Rep 2017; 7:44620. [PMID: 28304372 PMCID: PMC5356331 DOI: 10.1038/srep44620] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 02/10/2017] [Indexed: 02/07/2023] Open
Abstract
MicroRNAs (miRNAs) are small non-coding RNA species that have been shown to have roles in multiple processes that occur in higher eukaryotes. They act by binding to specific sequences in the 3’ untranslated region of their target genes and causing the transcripts to be degraded by the RNA-induced silencing complex (RISC). MicroRNAs have previously been reported to demonstrate altered expression in several aging phenotypes such as cellular senescence and age itself. Here, we have measured the expression levels of 521 small regulatory microRNAs (miRNAs) in spleen tissue from young and old animals of 6 mouse strains with different median strain lifespans by quantitative real-time PCR. Expression levels of 3 microRNAs were robustly associated with strain lifespan, after correction for multiple statistical testing (miR-203-3p [β-coefficient = −0.6447, p = 4.8 × 10−11], miR-664-3p [β-coefficient = 0.5552, p = 5.1 × 10−8] and miR-708-5p [β-coefficient = 0.4986, p = 1.6 × 10−6]). Pathway analysis of binding sites for these three microRNAs revealed enrichment of target genes involved in key aging and longevity pathways including mTOR, FOXO and MAPK, most of which also demonstrated associations with longevity. Our results suggests that miR-203-3p, miR-664-3p and miR-708-5p may be implicated in pathways determining lifespan in mammals.
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