1
|
Lin MC, Kuo WH, Chen SY, Hsu JY, Lu LY, Wang CC, Chen YJ, Tsai JS, Li HJ. Ago2/CAV1 interaction potentiates metastasis via controlling Ago2 localization and miRNA action. EMBO Rep 2024; 25:2441-2478. [PMID: 38649663 PMCID: PMC11094075 DOI: 10.1038/s44319-024-00132-7] [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: 11/07/2023] [Revised: 03/22/2024] [Accepted: 03/27/2024] [Indexed: 04/25/2024] Open
Abstract
Ago2 differentially regulates oncogenic and tumor-suppressive miRNAs in cancer cells. This discrepancy suggests a secondary event regulating Ago2/miRNA action in a context-dependent manner. We show here that a positive charge of Ago2 K212, that is preserved by SIR2-mediated Ago2 deacetylation in cancer cells, is responsible for the direct interaction between Ago2 and Caveolin-1 (CAV1). Through this interaction, CAV1 sequesters Ago2 on the plasma membranes and regulates miRNA-mediated translational repression in a compartment-dependent manner. Ago2/CAV1 interaction plays a role in miRNA-mediated mRNA suppression and in miRNA release via extracellular vesicles (EVs) from tumors into the circulation, which can be used as a biomarker of tumor progression. Increased Ago2/CAV1 interaction with tumor progression promotes aggressive cancer behaviors, including metastasis. Ago2/CAV1 interaction acts as a secondary event in miRNA-mediated suppression and increases the complexity of miRNA actions in cancer.
Collapse
Affiliation(s)
- Meng-Chieh Lin
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Wen-Hung Kuo
- Department of Surgery, National Taiwan University Hospital, Taipei, 100229, Taiwan
| | - Shih-Yin Chen
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan
- Institute of Biotechnology, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Jing-Ya Hsu
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Li-Yu Lu
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Chen-Chi Wang
- Department of Surgery, National Taiwan University Hospital, Taipei, 100229, Taiwan
| | - Yi-Ju Chen
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Jia-Shiuan Tsai
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Hua-Jung Li
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan.
- Program in Tissue Engineering and Regenerative Medicine, National Chung Hsing University, Taichung City, 402, Taiwan.
| |
Collapse
|
2
|
Lim JE, Bernatchez P, Nabi IR. Scaffolds and the scaffolding domain: an alternative paradigm for caveolin-1 signaling. Biochem Soc Trans 2024; 52:947-959. [PMID: 38526159 PMCID: PMC11088920 DOI: 10.1042/bst20231570] [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: 12/21/2023] [Revised: 03/10/2024] [Accepted: 03/11/2024] [Indexed: 03/26/2024]
Abstract
Caveolin-1 (Cav1) is a 22 kDa intracellular protein that is the main protein constituent of bulb-shaped membrane invaginations known as caveolae. Cav1 can be also found in functional non-caveolar structures at the plasma membrane called scaffolds. Scaffolds were originally described as SDS-resistant oligomers composed of 10-15 Cav1 monomers observable as 8S complexes by sucrose velocity gradient centrifugation. Recently, cryoelectron microscopy (cryoEM) and super-resolution microscopy have shown that 8S complexes are interlocking structures composed of 11 Cav1 monomers each, which further assemble modularly to form higher-order scaffolds and caveolae. In addition, Cav1 can act as a critical signaling regulator capable of direct interactions with multiple client proteins, in particular, the endothelial nitric oxide (NO) synthase (eNOS), a role believed by many to be attributable to the highly conserved and versatile scaffolding domain (CSD). However, as the CSD is a hydrophobic domain located by cryoEM to the periphery of the 8S complex, it is predicted to be enmeshed in membrane lipids. This has led some to challenge its ability to interact directly with client proteins and argue that it impacts signaling only indirectly via local alteration of membrane lipids. Here, based on recent advances in our understanding of higher-order Cav1 structure formation, we discuss how the Cav1 CSD may function through both lipid and protein interaction and propose an alternate view in which structural modifications to Cav1 oligomers may impact exposure of the CSD to cytoplasmic client proteins, such as eNOS.
Collapse
Affiliation(s)
- John E. Lim
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Department of Anesthesiology, Pharmacology and Therapeutics, Faculty of Medicine, University of British Columbia (UBC), 2176 Health Sciences Mall, Room 217, Vancouver, BC V6T 1Z3, Canada
| | - Pascal Bernatchez
- Department of Anesthesiology, Pharmacology and Therapeutics, Faculty of Medicine, University of British Columbia (UBC), 2176 Health Sciences Mall, Room 217, Vancouver, BC V6T 1Z3, Canada
- Centre for Heart and Lung Innovation, St. Paul's Hospital, Vancouver, Canada
| | - Ivan R. Nabi
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| |
Collapse
|
3
|
D’Alessio A. Unraveling the Cave: A Seventy-Year Journey into the Caveolar Network, Cellular Signaling, and Human Disease. Cells 2023; 12:2680. [PMID: 38067108 PMCID: PMC10705299 DOI: 10.3390/cells12232680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/16/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023] Open
Abstract
In the mid-1950s, a groundbreaking discovery revealed the fascinating presence of caveolae, referred to as flask-shaped invaginations of the plasma membrane, sparking renewed excitement in the field of cell biology. Caveolae are small, flask-shaped invaginations in the cell membrane that play crucial roles in diverse cellular processes, including endocytosis, lipid homeostasis, and signal transduction. The structural stability and functionality of these specialized membrane microdomains are attributed to the coordinated activity of scaffolding proteins, including caveolins and cavins. While caveolae and caveolins have been long appreciated for their integral roles in cellular physiology, the accumulating scientific evidence throughout the years reaffirms their association with a broad spectrum of human disorders. This review article aims to offer a thorough account of the historical advancements in caveolae research, spanning from their initial discovery to the recognition of caveolin family proteins and their intricate contributions to cellular functions. Furthermore, it will examine the consequences of a dysfunctional caveolar network in the development of human diseases.
Collapse
Affiliation(s)
- Alessio D’Alessio
- Sezione di Istologia ed Embriologia, Dipartimento di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, 00168 Roma, Italy;
- Fondazione Policlinico Universitario “Agostino Gemelli”, IRCCS, 00168 Rome, Italy
| |
Collapse
|
4
|
Garzón-Niño J, Cortés-Montero E, Rodríguez-Muñoz M, Sánchez-Blázquez P. αN-Acetyl β-Endorphin Is an Endogenous Ligand of σ1Rs That Regulates Mu-Opioid Receptor Signaling by Exchanging G Proteins for σ2Rs in σ1R Oligomers. Int J Mol Sci 2022; 24:ijms24010582. [PMID: 36614024 PMCID: PMC9820303 DOI: 10.3390/ijms24010582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/11/2022] [Accepted: 12/20/2022] [Indexed: 12/31/2022] Open
Abstract
The opioid peptide β-endorphin coexists in the pituitary and brain in its αN-acetylated form, which does not bind to opioid receptors. We now report that these neuropeptides exhibited opposite effects in in vivo paradigms, in which ligands of the sigma type 1 receptor (σ1R) displayed positive effects. Thus, αN-acetyl β-Endorphin reduced vascular infarct caused by permanent unilateral middle cerebral artery occlusion and diminished the incidence of N-methyl-D-aspartate acid-promoted convulsive syndrome and mechanical allodynia caused by unilateral chronic constriction of the sciatic nerve. Moreover, αN-acetyl β-Endorphin reduced the analgesia of morphine, β-Endorphin and clonidine but enhanced that of DAMGO. All these effects were counteracted by β-Endorphin and absent in σ1R-/- mice. We observed that σ1Rs negatively regulate mu-opioid receptor (MOR)-mediated morphine analgesia by binding and sequestering G proteins. In this scenario, β-Endorphin promoted the exchange of σ2Rs by G proteins at σ1R oligomers and increased the regulation of G proteins by MORs. The opposite was observed for the αN-acetyl derivative, as σ1R oligomerization decreased and σ2R binding was favored, which displaced G proteins; thus, MOR-regulated transduction was reduced. Our findings suggest that the pharmacological β-Endorphin-specific epsilon receptor is a σ1R-regulated MOR and that β-Endorphin and αN-acetyl β-Endorphin are endogenous ligands of σ1R.
Collapse
|
5
|
Biochemical and Biophysical Characterization of the Caveolin-2 Interaction with Membranes and Analysis of the Protein Structural Alteration by the Presence of Cholesterol. Int J Mol Sci 2022; 23:ijms232315203. [PMID: 36499524 PMCID: PMC9736327 DOI: 10.3390/ijms232315203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/22/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
Caveolin-2 is a protein suitable for the study of interactions of caveolins with other proteins and lipids present in caveolar lipid rafts. Caveolin-2 has a lower tendency to associate with high molecular weight oligomers than caveolin-1, facilitating the study of its structural modulation upon association with other proteins or lipids. In this paper, we have successfully expressed and purified recombinant human caveolin-2 using E. coli. The structural changes of caveolin-2 upon interaction with a lipid bilayer of liposomes were characterized using bioinformatic prediction models, circular dichroism, differential scanning calorimetry, and fluorescence techniques. Our data support that caveolin-2 binds and alters cholesterol-rich domains in the membranes through a CARC domain, a type of cholesterol-interacting domain in its sequence. The far UV-CD spectra support that the purified protein keeps its folding properties but undergoes a change in its secondary structure in the presence of lipids that correlates with the acquisition of a more stable conformation, as shown by differential scanning calorimetry experiments. Fluorescence experiments using egg yolk lecithin large unilamellar vesicles loaded with 1,6-diphenylhexatriene confirmed that caveolin-2 adsorbs to the membrane but only penetrates the core of the phospholipid bilayer if vesicles are supplemented with 30% of cholesterol. Our study sheds light on the caveolin-2 interaction with lipids. In addition, we propose that purified recombinant caveolin-2 can provide a new tool to study protein-lipid interactions within caveolae.
Collapse
|
6
|
Li SC, Kabeer MH. Caveolae-Mediated Extracellular Vesicle (CMEV) Signaling of Polyvalent Polysaccharide Vaccination: A Host-Pathogen Interface Hypothesis. Pharmaceutics 2022; 14:pharmaceutics14122653. [PMID: 36559147 PMCID: PMC9784826 DOI: 10.3390/pharmaceutics14122653] [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: 08/28/2022] [Revised: 10/22/2022] [Accepted: 11/22/2022] [Indexed: 12/02/2022] Open
Abstract
We published a study showing that improvement in response to splenectomy associated defective, in regards to the antibody response to Pneumovax® 23 (23-valent polysaccharides, PPSV23), can be achieved by splenocyte reinfusion. This study triggered a debate on whether and how primary and secondary immune responses occur based on humoral antibody responses to the initial vaccination and revaccination. The anti-SARS-CoV-2 vaccine sheds new light on the interpretation of our previous data. Here, we offer an opinion on the administration of the polyvalent polysaccharide vaccine (PPSV23), which appears to be highly relevant to the primary vaccine against SARS-CoV-2 and its booster dose. Thus, we do not insist this is a secondary immune response but an antibody response, nonetheless, as measured through IgG titers after revaccination. However, we contend that we are not sure if these lower but present IgG levels against pneumococcal antigens are clinically protective or are equally common in all groups because of the phenomenon of "hyporesponsiveness" seen after repeated polysaccharide vaccine challenge. We review the literature and propose a new mechanism-caveolae memory extracellular vesicles (CMEVs)-by which polysaccharides mediate prolonged and sustained immune response post-vaccination. We further delineate and explain the data sets to suggest that the dual targets on both Cav-1 and SARS-CoV-2 spike proteins may block the viral entrance and neutralize viral load, which minimizes the immune reaction against viral attacks and inflammatory responses. Thus, while presenting our immunological opinion, we answer queries and responses made by readers to our original statements published in our previous work and propose a hypothesis for all vaccination strategies, i.e., caveolae-mediated extracellular vesicle-mediated vaccine memory.
Collapse
Affiliation(s)
- Shengwen Calvin Li
- Neuro-Oncology and Stem Cell Research Laboratory, Center for Neuroscience Research, CHOC Children’s Research Institute, Children’s Hospital of Orange County, 1201 West La Veta Ave., Orange, CA 92868-3874, USA
- Department of Neurology, University of California-Irvine School of Medicine, 200 S Manchester Ave. Ste 206, Orange, CA 92868, USA
- Correspondence: ; Tel.: +1-714-509-4964
| | - Mustafa H. Kabeer
- Division of Pediatric General and Thoracic Surgery, CHOC Children’s Hospital, 1201 West La Veta Ave., Orange, CA 92868, USA
- Department of Surgery, University of California-Irvine School of Medicine, 333 City Blvd. West, Suite 700, Orange, CA 92868, USA
| |
Collapse
|
7
|
Ohi MD, Kenworthy AK. Emerging Insights into the Molecular Architecture of Caveolin-1. J Membr Biol 2022; 255:375-383. [PMID: 35972526 PMCID: PMC9588732 DOI: 10.1007/s00232-022-00259-5] [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: 06/29/2022] [Accepted: 07/22/2022] [Indexed: 11/24/2022]
Abstract
Caveolins are an unusual family of membrane proteins whose primary biological function is to build small invaginated membrane structures at the surface of cells known as caveolae. Caveolins and caveolae regulate numerous signaling pathways, lipid homeostasis, intracellular transport, cell adhesion, and cell migration. They also serve as sensors and protect the plasma membrane from mechanical stress. Despite their many important functions, the molecular basis for how these 50-100 nm "little caves" are assembled and regulate cell physiology has perplexed researchers for 70 years. One major impediment to progress has been the lack of information about the structure of caveolin complexes that serve as building blocks for the assembly of caveolae. Excitingly, recent advances have finally begun to shed light on this long-standing question. In this review, we highlight new developments in our understanding of the structure of caveolin oligomers, including the landmark discovery of the molecular architecture of caveolin-1 complexes using cryo-electron microscopy.
Collapse
Affiliation(s)
- Melanie D Ohi
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.
- Department of Cell and Developmental Biology, University of Michigan School of Medicine, Ann Arbor, MI, USA.
| | - Anne K Kenworthy
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA, USA.
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA, USA.
| |
Collapse
|
8
|
Ohsawa Y, Ohtsubo H, Saito Y, Nishimatsu S, Hagiwara H, Murakami T, Nishino I, Sunada Y. Caveolin 3 suppresses phosphorylation-dependent activation of sarcolemmal nNOS. Biochem Biophys Res Commun 2022; 628:84-90. [DOI: 10.1016/j.bbrc.2022.08.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 08/12/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022]
|
9
|
Porta JC, Han B, Gulsevin A, Chung JM, Peskova Y, Connolly S, Mchaourab HS, Meiler J, Karakas E, Kenworthy AK, Ohi MD. Molecular architecture of the human caveolin-1 complex. SCIENCE ADVANCES 2022; 8:eabn7232. [PMID: 35544577 PMCID: PMC9094659 DOI: 10.1126/sciadv.abn7232] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Membrane-sculpting proteins shape the morphology of cell membranes and facilitate remodeling in response to physiological and environmental cues. Complexes of the monotopic membrane protein caveolin function as essential curvature-generating components of caveolae, flask-shaped invaginations that sense and respond to plasma membrane tension. However, the structural basis for caveolin's membrane remodeling activity is currently unknown. Here, we show that, using cryo-electron microscopy, the human caveolin-1 complex is composed of 11 protomers organized into a tightly packed disc with a flat membrane-embedded surface. The structural insights suggest a previously unrecognized mechanism for how membrane-sculpting proteins interact with membranes and reveal how key regions of caveolin-1, including its scaffolding, oligomerization, and intramembrane domains, contribute to its function.
Collapse
Affiliation(s)
- Jason C. Porta
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Bing Han
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Alican Gulsevin
- Department of Chemistry, Vanderbilt University Nashville, TN, USA
| | - Jeong Min Chung
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Biotechnology, The Catholic University of Korea, Bucheon, Republic of Korea
| | - Yelena Peskova
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Sarah Connolly
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Hassane S. Mchaourab
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Jens Meiler
- Department of Chemistry, Vanderbilt University Nashville, TN, USA
- Institute for Drug Discovery, Leipzig University, Germany
| | - Erkan Karakas
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
- Corresponding author. (E.K.); (A.K.K.); (M.D.O.)
| | - Anne K. Kenworthy
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA, USA
- Corresponding author. (E.K.); (A.K.K.); (M.D.O.)
| | - Melanie D. Ohi
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Cell and Developmental Biology, University of Michigan School of Medicine, Ann Arbor, MI, USA
- Corresponding author. (E.K.); (A.K.K.); (M.D.O.)
| |
Collapse
|
10
|
Stucky A, Gao L, Li SC, Tu L, Luo J, Huang X, Chen X, Li X, Park TH, Cai J, Kabeer MH, Plant AS, Sun L, Zhang X, Zhong JF. Molecular Characterization of Differentiated-Resistance MSC Subclones by Single-Cell Transcriptomes. Front Cell Dev Biol 2022; 10:699144. [PMID: 35356283 PMCID: PMC8959432 DOI: 10.3389/fcell.2022.699144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 02/14/2022] [Indexed: 11/25/2022] Open
Abstract
Background: The mechanism of tumorigenicity potentially evolved in mesenchymal stem cells (MSCs) remains elusive, resulting in inconsistent clinical application efficacy. We hypothesized that subclones in MSCs contribute to their tumorgenicity, and we approached MSC-subclones at the single-cell level. Methods: MSCs were cultured in an osteogenic differentiation medium and harvested on days 12, 19, and 25 for cell differentiation analysis using Alizarin Red and followed with the single-cell transcriptome. Results: Single-cell RNA-seq analysis reveals a discrete cluster of MSCs during osteogenesis, including differentiation-resistant MSCs (DR-MSCs), differentiated osteoblasts (DO), and precursor osteoblasts (PO). The DR-MSCs population resembled cancer initiation cells and were subjected to further analysis of the yes associated protein 1 (YAP1) network. Verteporfin was also used for YAP1 inhibition in cancer cell lines to confirm the role of YAP1 in MSC--involved tumorigenicity. Clinical data from various cancer types were analyzed to reveal relationships among YAP1, OCT4, and CDH6 in MSC--involved tumorigenicity. The expression of cadherin 6 (CDH6), octamer-binding transcription factor 4 (OCT4), and YAP1 expression was significantly upregulated in DR-MSCs compared to PO and DO. YAP1 inhibition by Verteporfin accelerated the differentiation of MSCs and suppressed the expression of YAP1, CDH6, and OCT4. A survey of 56 clinical cohorts revealed a high degree of co-expression among CDH6, YAP1, and OCT4 in various solid tumors. YAP1 inhibition also down-regulated HeLa cell viability and gradually inhibited YAP1 nuclear localization while reducing the transcription of CDH6 and OCT4. Conclusions: We used single-cell sequencing to analyze undifferentiated MSCs and to discover a carcinogenic pathway in single-cell MSCs of differentiated resistance subclones.
Collapse
Affiliation(s)
- Andres Stucky
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, CA, United States
| | - Li Gao
- Medical Center of Hematology, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Shengwen Calvin Li
- Neuro-oncology and Stem Cell Research Laboratory, CHOC Children’s Research Institute, Center for Neuroscience Research, Children’s Hospital of Orange County (CHOC), Orange, CA, United States
- Department of Neurology, Irvine School of Medicine, University of California, Irvine, CA, United States
- *Correspondence: Shengwen Calvin Li, ; Lan Sun, ; Xi Zhang,
| | - Lingli Tu
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, CA, United States
- Department of Oncology, Bishan, The People’s Hospital of Bishan District, Bishan, Chongqing, China
| | - Jun Luo
- Stomatological Hospital of Chongqing Medical University, Chongqing, China
| | - Xi Huang
- Department of Hematology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xuelian Chen
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, CA, United States
| | - Xiaoqing Li
- Department of Oncology, Bishan, The People’s Hospital of Bishan District, Bishan, Chongqing, China
| | - Tiffany H. Park
- School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Jin Cai
- Department of Oral and Maxillofacial Surgery, Zhuhai People’s Hospital, Zhuhai Hospital Affiliated with Jinan University, Zhuhai, China
| | - Mustafa H. Kabeer
- Pediatric Surgery, CHOC Children’s Hospital, Department of Surgery, Irvine School of Medicine, University of California, Irvine, CA, United States
| | - Ashley S. Plant
- Division of Pediatric Oncology, Children’s Hospital of Orange County, Orange, CA, United States
| | - Lan Sun
- Department of Oncology, Bishan, The People’s Hospital of Bishan District, Bishan, Chongqing, China
- *Correspondence: Shengwen Calvin Li, ; Lan Sun, ; Xi Zhang,
| | - Xi Zhang
- Medical Center of Hematology, Xinqiao Hospital, Army Medical University, Chongqing, China
- *Correspondence: Shengwen Calvin Li, ; Lan Sun, ; Xi Zhang,
| | - Jiang F. Zhong
- Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, CA, United States
| |
Collapse
|
11
|
A novel peripheral biomarker for depression and antidepressant response. Mol Psychiatry 2022; 27:1640-1646. [PMID: 34969978 PMCID: PMC9106819 DOI: 10.1038/s41380-021-01399-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 11/13/2021] [Accepted: 11/23/2021] [Indexed: 12/20/2022]
Abstract
In contrast to healthy controls, the heterotrimeric G protein, Gsalpha (Gsα) is ensconced predominantly in lipid rafts in subjects with major depressive disorder (MDD) resulting in impaired stimulation of adenylyl cyclase. In this small proof-of-concept study, we examined the hypothesis that translocation of Gsα from lipid rafts toward a more facile activation of adenylyl cyclase is a biomarker for clinical response to antidepressants. There were 49 subjects with MDD (HamD17 score ≥15) and 59 healthy controls at the screen visit. The AlphaScreen (PerkinElmer) assay measured both basal activity and prostaglandin E1 (PGE1) stimulation of Gsα-adenylyl cyclase to assess the extent of coupling of Gsα with adenylyl cyclase. At screen, platelet samples obtained from MDD subjects revealed significantly lower PGE1 activation of adenylyl cyclase activity than controls (p = 0.02). Subsequently, 19 consenting MDD subjects completed a 6-week open label antidepressant treatment trial. The 11 antidepressant responders (HamD17 improvement ≥50% from screen) revealed significant increase in PGE1-stimulated adenylyl cyclase compared to non-responders (p = 0.05) with an effect size of 0.83 for the PGE1/Gsα lipid-raft biomarker. PGE1 stimulation increased by ≥30% from screen assessment in eight responders (72.7%) and two non-responders (25.0%) [Fisher exact = 0.07] with a positive predictive value for response of 80.0%. In this small, pilot study, increased PGE1 stimulated adenylyl cyclase was associated with antidepressant response in MDD subjects. These data suggest that a simple, high-throughput-capable assay for depression and antidepressant response can be developed. Future studies are needed to evaluate the utility of this biomarker for the treatment of MDD.
Collapse
|
12
|
Troiano JA, Potje SR, Graton ME, Gonçalves ET, Tostes RC, Antoniali C. Caveolin-1/Endothelial Nitric Oxide Synthase Interaction Is Reduced in Arteries From Pregnant Spontaneously Hypertensive Rats. Front Physiol 2021; 12:760237. [PMID: 34858211 PMCID: PMC8631196 DOI: 10.3389/fphys.2021.760237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/14/2021] [Indexed: 12/03/2022] Open
Abstract
We have investigated the role caveolae/caveolin-1 (Cav-1) plays in endothelial nitric oxide synthase (eNOS) activation and how it impacts pregnancy-induced decreased vascular reactivity in normotensive (Wistar rats) and spontaneously hypertensive rats (SHR). Wistar rats and SHR were divided into non-pregnant (NP) and pregnant (P). Nitrite levels were assessed by the Griess method in the aorta and mesenteric vascular bed. In functional studies, arteries were incubated with methyl-β-cyclodextrin (dextrin, 10mmol/L), which disrupts caveolae by depleting cholesterol, and concentration-response curves to phenylephrine (PE) and acetylcholine (ACh) were constructed. Electronic microscopy was used to determine endothelial caveolae density in the aorta and resistance mesenteric artery in the presence of vehicle or dextrin (10mmol/L). Western blot was performed to evaluate Cav-1, p-Cav-1, calmodulin (CaM), and heat shock protein 90 (Hsp90) expression. Cav-1/eNOS interaction in the aorta and mesenteric vascular bed was assessed by co-immunoprecipitation. Nitric oxide (NO) generation was greater in arteries from P groups compared to NP groups. Dextrin did not change vascular responses in the aorta from P groups or the number of caveolae in P groups compared to NP groups. Compared to NP Wistar rats, NP SHR showed smaller number of caveolae and reduced Cav-1 expression. Pregnancy did not alter Cav-1, CaM, or Hsp90 expression in the aorta or mesenteric vascular bed from Wistar rats or SHR. These results suggest that pregnancy does not alter expression of the main eNOS regulatory proteins, but it decreases Cav-1/eNOS interaction. Reduced Cav-1/eNOS interaction in the aorta and mesenteric vascular bed seems to be an important mechanism to increase eNOS activity and nitric oxide production in pregnant normotensive and hypertensive rats.
Collapse
Affiliation(s)
- Jéssica A Troiano
- Programa de Pós-graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, Brazil.,Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Simone R Potje
- Department of Physics and Chemistry, Ribeirão Preto, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil.,Department of Biological Sciences, Minas Gerais State University (UEMG), Passos, Brazil
| | - Murilo E Graton
- Programa de Pós-graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, Brazil.,Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Emily T Gonçalves
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| | - Rita C Tostes
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Cristina Antoniali
- Programa de Pós-graduação Multicêntrico em Ciências Fisiológicas, SBFis, São Paulo State University (UNESP), Araçatuba, Brazil.,Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba, Brazil
| |
Collapse
|
13
|
Takemoto M, Sakamoto H, Higashimoto Y, Taira J. Complex Formation of Heme Oxygenase-2 with Heme Is Competitively Inhibited by the Cytosolic Domain of Caveolin-1. Biochemistry 2021; 60:2300-2308. [PMID: 34223768 DOI: 10.1021/acs.biochem.1c00247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanism and physiological functions of heme oxygenase-2 (HO-2)-mediated carbon monoxide (CO) production, accompanied by heme metabolism, have been studied intensively in recent years. The enzymatic activity of constitutively expressed HO-2 must be strictly controlled in terms of the toxicity and chemical stability of CO. In this study, the molecular interaction between HO-2 and caveolin-1 and its effect on HO action were evaluated. An enzyme kinetics assay with residues 82-101 of caveolin-1, also called the caveolin scaffold domain, inhibited HO-2 activity in a competitive manner. Analytical ultracentrifugation and a hemin titration assay suggested that the inhibitory effect was generated by direct binding of caveolin-1 to aromatic residues, which were defined as components of the caveolin-binding motif in the HO-2 heme pocket. Herein, we developed a HO-2-based fluorescence bioprobe, namely EGFP-Δ19/D159H, which was capable of quantifying heme binding by HO-2 as the initial step in the CO production. The fluorescence of EGFP-Δ19/D159H decreased in accordance with 5-aminolevulinic acid-facilitated heme biosynthesis in COS-7 cells. In contrast, expression of the N-terminal cytosolic domain of caveolin-1 (residues 1-101) increased the probe fluorescence, suggesting that the cytosolic domain of caveolin-1 potently inhibits the binding of heme to the heme pocket of EGFP-Δ19/D159H. Taken together, our results suggest that caveolin-1 is a negative regulator of HO-2 enzymatic action. Moreover, our bioprobe EGFP-Δ19/D159H represents a powerful tool for use in future studies addressing HO-2-mediated CO production.
Collapse
Affiliation(s)
- Misaki Takemoto
- Department of Bioscience and Bioinformatics, Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka 820-8502, Japan
| | - Hiroshi Sakamoto
- Department of Bioscience and Bioinformatics, Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka 820-8502, Japan
| | - Yuichiro Higashimoto
- Department of Chemistry, Kurume University School of Medicine, Kurume 830-0011, Japan
| | - Junichi Taira
- Department of Bioscience and Bioinformatics, Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka 820-8502, Japan.,Department of Chemistry, Kurume University School of Medicine, Kurume 830-0011, Japan
| |
Collapse
|
14
|
Mustapha S, Mohammed M, Azemi AK, Yunusa I, Shehu A, Mustapha L, Wada Y, Ahmad MH, Ahmad WANW, Rasool AHG, Mokhtar SS. Potential Roles of Endoplasmic Reticulum Stress and Cellular Proteins Implicated in Diabesity. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:8830880. [PMID: 33995826 PMCID: PMC8099518 DOI: 10.1155/2021/8830880] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 03/28/2021] [Accepted: 04/05/2021] [Indexed: 12/12/2022]
Abstract
The role of the endoplasmic reticulum (ER) has evolved from protein synthesis, processing, and other secretory pathways to forming a foundation for lipid biosynthesis and other metabolic functions. Maintaining ER homeostasis is essential for normal cellular function and survival. An imbalance in the ER implied stressful conditions such as metabolic distress, which activates a protective process called unfolded protein response (UPR). This response is activated through some canonical branches of ER stress, i.e., the protein kinase RNA-like endoplasmic reticulum kinase (PERK), inositol-requiring enzyme 1α (IRE1α), and activating transcription factor 6 (ATF6). Therefore, chronic hyperglycemia, hyperinsulinemia, increased proinflammatory cytokines, and free fatty acids (FFAs) found in diabesity (a pathophysiological link between obesity and diabetes) could lead to ER stress. However, limited data exist regarding ER stress and its association with diabesity, particularly the implicated proteins and molecular mechanisms. Thus, this review highlights the role of ER stress in relation to some proteins involved in diabesity pathogenesis and provides insight into possible pathways that could serve as novel targets for therapeutic intervention.
Collapse
Affiliation(s)
- Sagir Mustapha
- Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kota Bharu, Kelantan, Malaysia
- Department of Pharmacology and Therapeutics, Ahmadu Bello University Zaria, Kaduna, Nigeria
| | - Mustapha Mohammed
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Penang, Pulau Pinang, Malaysia
- Department of Clinical Pharmacy and Pharmacy Practice, Ahmadu Bello University Zaria, Kaduna, Nigeria
| | - Ahmad Khusairi Azemi
- Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kota Bharu, Kelantan, Malaysia
| | - Ismaeel Yunusa
- Department of Clinical Pharmacy and Outcomes Sciences, University of South Carolina, College of Pharmacy, Columbia, SC, USA
| | - Aishatu Shehu
- Department of Pharmacology and Therapeutics, Ahmadu Bello University Zaria, Kaduna, Nigeria
| | - Lukman Mustapha
- Department of Pharmaceutical and Medicinal Chemistry, Kaduna State University, Kaduna, Nigeria
| | - Yusuf Wada
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kota Bharu, Kelantan, Malaysia
- Department of Zoology, Ahmadu Bello University Zaria, Kaduna, Nigeria
| | - Mubarak Hussaini Ahmad
- Department of Pharmacology and Therapeutics, Ahmadu Bello University Zaria, Kaduna, Nigeria
- School of Pharmacy Technician, Aminu Dabo College of Health Sciences and Technology, Kano, Nigeria
| | - Wan Amir Nizam Wan Ahmad
- Biomedicine Programme, School of Health Sciences, Universiti Sains Malaysia, 16150 Kota Bharu, Kelantan, Malaysia
| | - Aida Hanum Ghulam Rasool
- Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kota Bharu, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, 16150 Kota Bharu, Kelantan, Malaysia
| | - Siti Safiah Mokhtar
- Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kota Bharu, Kelantan, Malaysia
| |
Collapse
|
15
|
Wong TH, Khater IM, Joshi B, Shahsavari M, Hamarneh G, Nabi IR. Single molecule network analysis identifies structural changes to caveolae and scaffolds due to mutation of the caveolin-1 scaffolding domain. Sci Rep 2021; 11:7810. [PMID: 33833286 PMCID: PMC8032680 DOI: 10.1038/s41598-021-86770-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 03/15/2021] [Indexed: 11/22/2022] Open
Abstract
Caveolin-1 (CAV1), the caveolae coat protein, also associates with non-caveolar scaffold domains. Single molecule localization microscopy (SMLM) network analysis distinguishes caveolae and three scaffold domains, hemispherical S2 scaffolds and smaller S1B and S1A scaffolds. The caveolin scaffolding domain (CSD) is a highly conserved hydrophobic region that mediates interaction of CAV1 with multiple effector molecules. F92A/V94A mutation disrupts CSD function, however the structural impact of CSD mutation on caveolae or scaffolds remains unknown. Here, SMLM network analysis quantitatively shows that expression of the CAV1 CSD F92A/V94A mutant in CRISPR/Cas CAV1 knockout MDA-MB-231 breast cancer cells reduces the size and volume and enhances the elongation of caveolae and scaffold domains, with more pronounced effects on S2 and S1B scaffolds. Convex hull analysis of the outer surface of the CAV1 point clouds confirms the size reduction of CSD mutant CAV1 blobs and shows that CSD mutation reduces volume variation amongst S2 and S1B CAV1 blobs at increasing shrink values, that may reflect retraction of the CAV1 N-terminus towards the membrane, potentially preventing accessibility of the CSD. Detection of point mutation-induced changes to CAV1 domains highlights the utility of SMLM network analysis for mesoscale structural analysis of oligomers in their native environment.
Collapse
Affiliation(s)
- Timothy H Wong
- Life Sciences Institute, Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Ismail M Khater
- School of Computing Science, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Bharat Joshi
- Life Sciences Institute, Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Mona Shahsavari
- School of Computing Science, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Ghassan Hamarneh
- School of Computing Science, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada.
| | - Ivan R Nabi
- Life Sciences Institute, Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada. .,School of Biomedical Engineering, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada.
| |
Collapse
|
16
|
Bondar A, Jang W, Sviridova E, Lambert NA. Components of the G s signaling cascade exhibit distinct changes in mobility and membrane domain localization upon β 2 -adrenergic receptor activation. Traffic 2021; 21:324-332. [PMID: 32096320 DOI: 10.1111/tra.12724] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 02/21/2020] [Accepted: 02/21/2020] [Indexed: 12/12/2022]
Abstract
The G protein signaling cascade is a key player in cell signaling. Cascade activation leads to a redistribution of its members in various cellular compartments. These changes are likely related to the "second wave" of signaling from endosomes. Here, we set out to determine whether Gs signaling cascade members expressed at very low levels exhibit altered mobility and localize in clathrin-coated structures (CCSs) or caveolae upon activation by β2 -adrenergic receptors (β2 AR). Activated β2 AR showed decreased mobility and sustained accumulation in CCSs but not in caveolae. Arrestin 3 translocated to the plasma membrane after β2 AR activation and showed very low mobility and pronounced accumulation in CCSs. In contrast, Gαs and Gγ2 exhibited a modest reduction in mobility but no detectable accumulation in or exclusion from CCSs or caveolae. The effector adenylyl cyclase 5 (AC5) showed a slight mobility increase upon β2 AR stimulation, no redistribution to CCSs, and weak activation-independent accumulation in caveolae. Our findings show an overall decrease in the mobility of most activated Gs signaling cascade members and confirm that β2 AR and arrestin 3 accumulate in CCSs, while Gαs , Gγ2 and AC5 can transiently enter CCSs and caveolae but do not accumulate in and are not excluded from these domains.
Collapse
Affiliation(s)
- Alexey Bondar
- Department of Pharmacology and Toxicology, Augusta University, Augusta, Georgia, USA.,Center for Nanobiology and Structural Biology, Institute of Microbiology of the Academy of Sciences of the Czech Republic, Czech Republic.,Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Prague, Czech Republic.,University of South Bohemia, Czech Republic
| | - Wonjo Jang
- Department of Pharmacology and Toxicology, Augusta University, Augusta, Georgia, USA
| | - Ekaterina Sviridova
- Center for Nanobiology and Structural Biology, Institute of Microbiology of the Academy of Sciences of the Czech Republic, Czech Republic
| | - Nevin A Lambert
- Department of Pharmacology and Toxicology, Augusta University, Augusta, Georgia, USA
| |
Collapse
|
17
|
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.
Collapse
|
18
|
Abstract
Caveolin-1 (CAV1) has long been implicated in cancer progression, and while widely accepted as an oncogenic protein, CAV1 also has tumor suppressor activity. CAV1 was first identified in an early study as the primary substrate of Src kinase, a potent oncoprotein, where its phosphorylation correlated with cellular transformation. Indeed, CAV1 phosphorylation on tyrosine-14 (Y14; pCAV1) has been associated with several cancer-associated processes such as focal adhesion dynamics, tumor cell migration and invasion, growth suppression, cancer cell metabolism, and mechanical and oxidative stress. Despite this, a clear understanding of the role of Y14-phosphorylated pCAV1 in cancer progression has not been thoroughly established. Here, we provide an overview of the role of Src-dependent phosphorylation of tumor cell CAV1 in cancer progression, focusing on pCAV1 in tumor cell migration, focal adhesion signaling and metabolism, and in the cancer cell response to stress pathways characteristic of the tumor microenvironment. We also discuss a model for Y14 phosphorylation regulation of CAV1 effector protein interactions via the caveolin scaffolding domain.
Collapse
|
19
|
Abstract
Caveolin-1 (CAV1) is commonly considered to function as a cell surface protein, for instance in the genesis of caveolae. Nonetheless, it is also present in many intracellular organelles and compartments. The contributions of these intracellular pools to CAV1 function are generally less well understood, and this is also the case in the context of cancer. This review will summarize literature available on the role of CAV1 in cancer, highlighting particularly our understanding of the canonical (CAV1 in the plasma membrane) and non-canonical pathways (CAV1 in organelles and exosomes) linked to the dual role of the protein as a tumor suppressor and promoter of metastasis. With this in mind, we will focus on recently emerging concepts linking CAV1 function to the regulation of intracellular organelle communication within the same cell where CAV1 is expressed. However, we now know that CAV1 can be released from cells in exosomes and generate systemic effects. Thus, we will also elaborate on how CAV1 participates in intracellular communication between organelles as well as signaling between cells (non-canonical pathways) in cancer.
Collapse
|
20
|
Dudãu M, Codrici E, Tanase C, Gherghiceanu M, Enciu AM, Hinescu ME. Caveolae as Potential Hijackable Gates in Cell Communication. Front Cell Dev Biol 2020; 8:581732. [PMID: 33195223 PMCID: PMC7652756 DOI: 10.3389/fcell.2020.581732] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 10/08/2020] [Indexed: 12/16/2022] Open
Abstract
Caveolae are membrane microdomains described in many cell types involved in endocytocis, transcytosis, cell signaling, mechanotransduction, and aging. They are found at the interface with the extracellular environment and are structured by caveolin and cavin proteins. Caveolae and caveolins mediate transduction of chemical messages via signaling pathways, as well as non-chemical messages, such as stretching or shear stress. Various pathogens or signals can hijack these gates, leading to infectious, oncogenic and even caveolin-related diseases named caveolinopathies. By contrast, preclinical and clinical research have fallen behind in their attempts to hijack caveolae and caveolins for therapeutic purposes. Caveolae involvement in human disease is not yet fully explored or understood and, of all their scaffold proteins, only caveolin-1 is being considered in clinical trials as a possible biomarker of disease. This review briefly summarizes current knowledge about caveolae cell signaling and raises the hypothesis whether these microdomains could serve as hijackable “gatekeepers” or “gateways” in cell communication. Furthermore, because cell signaling is one of the most dynamic domains in translating data from basic to clinical research, we pay special attention to translation of caveolae, caveolin, and cavin research into clinical practice.
Collapse
Affiliation(s)
- Maria Dudãu
- Biochemistry-Proteomics Laboratory, Victor Babes National Institute of Pathology, Bucharest, Romania.,Cell Biology and Histology Department, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Elena Codrici
- Biochemistry-Proteomics Laboratory, Victor Babes National Institute of Pathology, Bucharest, Romania
| | - Cristiana Tanase
- Biochemistry-Proteomics Laboratory, Victor Babes National Institute of Pathology, Bucharest, Romania.,Clinical Biochemistry Department, Faculty of Medicine, Titu Maiorescu University, Bucharest, Romania
| | - Mihaela Gherghiceanu
- Biochemistry-Proteomics Laboratory, Victor Babes National Institute of Pathology, Bucharest, Romania.,Cell Biology and Histology Department, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Ana-Maria Enciu
- Biochemistry-Proteomics Laboratory, Victor Babes National Institute of Pathology, Bucharest, Romania.,Cell Biology and Histology Department, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Mihail E Hinescu
- Biochemistry-Proteomics Laboratory, Victor Babes National Institute of Pathology, Bucharest, Romania.,Cell Biology and Histology Department, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| |
Collapse
|
21
|
Caveolin-1 regulates medium spiny neuron structural and functional plasticity. Psychopharmacology (Berl) 2020; 237:2673-2684. [PMID: 32488350 PMCID: PMC7502476 DOI: 10.1007/s00213-020-05564-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 05/18/2020] [Indexed: 12/14/2022]
Abstract
RATIONALE Caveolin-1 (CAV1) is a structural protein critical for spatial organization of neuronal signaling molecules. Whether CAV1 is required for long-lasting neuronal plasticity remains unknown. OBJECTIVE AND METHODS We sought to examine the effects of CAV1 knockout (KO) on functional plasticity and hypothesized that CAV1 deficiency would impact drug-induced long-term plasticity in the nucleus accumbens (NAc). We first examined cell morphology of NAc medium spiny neurons in a striatal/cortical co-culture system before moving in vivo to study effects of CAV1 KO on cocaine-induced plasticity. Whole-cell patch-clamp recordings were performed to determine effects of chronic cocaine (15 mg/kg) on medium spiny neuron excitability. To test for deficits in behavioral plasticity, we examined the effect of CAV1 KO on locomotor sensitization. RESULTS Disruption of CAV1 expression leads to baseline differences in medium spiny neuron (MSN) structural morphology, such that MSNs derived from CAV1 KO animals have increased dendritic arborization when cultured with cortical neurons. The effect was dependent on phospholipase C and cell-type intrinsic loss of CAV1. Slice recordings of nucleus accumbens shell MSNs revealed that CAV1 deficiency produces a loss of neuronal plasticity. Specifically, cocaine-induced firing rate depression was absent in CAV1 KO animals, whereas baseline electrophysiological properties were similar. This was reflected by a loss of cocaine-mediated behavioral sensitization in CAV1 KO animals, with unaffected baseline locomotor responsiveness. CONCLUSIONS This study highlights a critical role for nucleus accumbens CAV1 in plasticity related to the administration of drugs of abuse.
Collapse
|
22
|
Tiruppathi C, Regmi SC, Wang DM, Mo GCH, Toth PT, Vogel SM, Stan RV, Henkemeyer M, Minshall RD, Rehman J, Malik AB. EphB1 interaction with caveolin-1 in endothelial cells modulates caveolae biogenesis. Mol Biol Cell 2020; 31:1167-1182. [PMID: 32238105 PMCID: PMC7353165 DOI: 10.1091/mbc.e19-12-0713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/24/2020] [Accepted: 03/25/2020] [Indexed: 12/16/2022] Open
Abstract
Caveolae, the cave-like structures abundant in endothelial cells (ECs), are important for multiple signaling processes such as production of nitric oxide and caveolae-mediated intracellular trafficking. Using superresolution microscopy, fluorescence resonance energy transfer, and biochemical analysis, we observed that the EphB1 receptor tyrosine kinase constitutively interacts with caveolin-1 (Cav-1), the key structural protein of caveolae. Activation of EphB1 with its ligand Ephrin B1 induced EphB1 phosphorylation and the uncoupling EphB1 from Cav-1 and thereby promoted phosphorylation of Cav-1 by Src. Deletion of Cav-1 scaffold domain binding (CSD) motif in EphB1 prevented EphB1 binding to Cav-1 as well as Src-dependent Cav-1 phosphorylation, indicating the importance of CSD in the interaction. We also observed that Cav-1 protein expression and caveolae numbers were markedly reduced in ECs from EphB1-deficient (EphB1-/-) mice. The loss of EphB1 binding to Cav-1 promoted Cav-1 ubiquitination and degradation, and hence the loss of Cav-1 was responsible for reducing the caveolae numbers. These studies identify the crucial role of EphB1/Cav-1 interaction in the biogenesis of caveolae and in coordinating the signaling function of Cav-1 in ECs.
Collapse
Affiliation(s)
- Chinnaswamy Tiruppathi
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
- The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612
| | - Sushil C. Regmi
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
| | - Dong-Mei Wang
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
| | - Gary C. H. Mo
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
| | - Peter T. Toth
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
| | - Stephen M. Vogel
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
| | - Radu V. Stan
- Department of Pathology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755
| | - Mark Henkemeyer
- Departments of Neuroscience and Developmental Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Richard D. Minshall
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
- Anesthesiology, The University of Illinois College of Medicine, Chicago, IL 60612
- The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612
| | - Jalees Rehman
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
| | - Asrar B. Malik
- Departments of Pharmacology, The University of Illinois College of Medicine, Chicago, IL 60612
- The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612
| |
Collapse
|
23
|
Zhang J, Yan D, He L, Zhang Q, Wen S, Liu P, Zhou H, Peng Y. Expression of Caveolin-1 Is Associated With Thyroid Function in Patients With Human Papillary Thyroid Carcinoma. Dose Response 2020; 18:1559325820919330. [PMID: 32313526 PMCID: PMC7160781 DOI: 10.1177/1559325820919330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 03/12/2020] [Accepted: 03/20/2020] [Indexed: 11/22/2022] Open
Abstract
Objective: The aim of this study was to evaluate the levels of caveolin-1 in thyroid
follicular epithelial cells of papillary thyroid cancer, follicular thyroid
cancer, and nonmalignant thyroid nodule benign follicular adenoma, as well
as to explore the relationship between the levels of caveolin-1 and thyroid
function. Methods: Thirty cases of papillary thyroid cancer, 10 cases of follicular thyroid
cancer, 32 cases of nonmalignant thyroid nodule benign follicular adenoma,
and 30 controls were enrolled in this study. Caveolin-1 expression in tissue
specimens obtained from these cases was evaluated by immunohistochemistry
and Western blotting. Results: Caveolin-1 expression in thyroid epithelial cells of patients with papillary
thyroid cancer, particularly female patients, was significantly higher than
that in patients with follicular thyroid cancer and nonmalignant thyroid
nodule benign follicular adenoma (P < .005). Serum
thyroid-stimulating hormone (TSH) levels in the caveolin-1-positive
expression group were lower than that in the caveolin-1-negative expression
group, and the lowest expression of caveolin-1 was detected in tissues of
patients with Graves’ disease. The serum TSH level was associated with
caveolin-1 expression in thyroid epithelial cells. Conclusion: Caveolin-1 may participate in regulating thyroid function and is a potential
biomarker of follicular thyroid cancer.
Collapse
Affiliation(s)
- Jingyi Zhang
- Department of Endocrinology, Shanghai General Hospital of Nanjing Medical University, Shanghai, China.,Department of Immunology, Nanjing Medical University, Nanjing, China.,The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, China
| | - Dongxia Yan
- Department of Pathology, Ma'anshan People's Hospital, Ma'anshan, China
| | - Lianping He
- College of Experience Industry, Anhui Polytechnic University, Wuhu, Anhui, China
| | - Qing Zhang
- Department of Pathology, Ma'anshan People's Hospital, Ma'anshan, China
| | - Shuang Wen
- Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Peiyu Liu
- Department of Pharmacology, School of Basic Medical Science, Nanjing Medical University, Nanjing, China
| | - Hong Zhou
- Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Yongde Peng
- Department of Endocrinology, Shanghai General Hospital of Nanjing Medical University, Shanghai, China
| |
Collapse
|
24
|
|
25
|
Lian X, Matthaeus C, Kaßmann M, Daumke O, Gollasch M. Pathophysiological Role of Caveolae in Hypertension. Front Med (Lausanne) 2019; 6:153. [PMID: 31355199 PMCID: PMC6635557 DOI: 10.3389/fmed.2019.00153] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 06/20/2019] [Indexed: 12/02/2022] Open
Abstract
Caveolae, flask-shaped cholesterol-, and glycosphingolipid-rich membrane microdomains, contain caveolin 1, 2, 3 and several structural proteins, in particular Cavin 1-4, EHD2, pacsin2, and dynamin 2. Caveolae participate in several physiological processes like lipid uptake, mechanosensitivity, or signaling events and are involved in pathophysiological changes in the cardiovascular system. They serve as a specific membrane platform for a diverse set of signaling molecules like endothelial nitric oxide synthase (eNOS), and further maintain vascular homeostasis. Lack of caveolins causes the complete loss of caveolae; induces vascular disorders, endothelial dysfunction, and impaired myogenic tone; and alters numerous cellular processes, which all contribute to an increased risk for hypertension. This brief review describes our current knowledge on caveolae in vasculature, with special focus on their pathophysiological role in hypertension.
Collapse
Affiliation(s)
- Xiaoming Lian
- Experimental and Clinical Research Center—A Joint Cooperation Between the Charité–University Medicine Berlin and the Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Claudia Matthaeus
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Mario Kaßmann
- Experimental and Clinical Research Center—A Joint Cooperation Between the Charité–University Medicine Berlin and the Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Oliver Daumke
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Maik Gollasch
- Experimental and Clinical Research Center—A Joint Cooperation Between the Charité–University Medicine Berlin and the Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Medical Clinic for Nephrology and Internal Intensive Care, Berlin, Germany
| |
Collapse
|
26
|
Huang L, Wyse BD, Williams CM, Smith MT. Nitric oxide modulates μ-opioid receptor function in vitro. Clin Exp Pharmacol Physiol 2019; 46:676-685. [PMID: 30933370 DOI: 10.1111/1440-1681.13091] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/02/2019] [Accepted: 03/27/2019] [Indexed: 01/10/2023]
Abstract
Painful diabetic neuropathy (PDN) is a type of peripheral neuropathic pain that develops as a consequence of prolonged hyperglycaemia-induced injury to the long nerves. Apart from pain, PDN is also characterized by morphine hyposensitivity. Intriguingly, in streptozotocin (STZ)-induced diabetic rats exhibiting marked morphine hyposensitivity, dietary administration of the nitric oxide (NO) precursor, L-arginine at 1 g/d, progressively rescued morphine efficacy and potency over an 8-week treatment period. In earlier work, single bolus doses of the furoxan nitric oxide (NO) donor, PRG150 (3-methylfuroxan-4-carbaldehyde), evoked dose-dependent pain relief in STZ-diabetic rats but the efficacious doses were 3-4 orders of magnitude higher in advanced diabetes than that required in early STZ diabetes. Together, these findings suggested a role for NO in the modulation of μ-opioid (MOP) receptor signalling. Therefore, the present study was designed to assess a role for NO released from PRG150, in modulating MOP receptor function in vitro. Here, we show an absolute requirement for the MOP receptor, but not the δ-opioid (DOP) or the κ-opioid (KOP) receptor, to transduce the cellular effects of PRG150 on forskolin-stimulated cAMP responses in vitro. PRG150 did not interact with the classical naloxone-sensitive binding site of the MOP receptor, and its effects on cAMP responses in HEK-MOP cells were also naloxone-insensitive. Nevertheless, the inhibitory effects of PRG150 on forskolin-stimulated cAMP responses in HEK-MOP cells were dependent upon pertussis toxin (PTX)-sensitive Gi/o proteins as well as membrane lipid rafts and src kinase. Together, our findings implicate a role for NO in modulating MOP receptor function in vivo.
Collapse
Affiliation(s)
- Lillian Huang
- School of Pharmacy, Faculty of Health and Behavioural Sciences, The University of Queensland, Brisbane, Queensland, Australia.,School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Bruce D Wyse
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, Faculty of Science, The University of Queensland, Brisbane, Queensland, Australia
| | - Maree T Smith
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| |
Collapse
|
27
|
González R, Molina-Ruiz FJ, Bárcena JA, Padilla CA, Muntané J. Regulation of Cell Survival, Apoptosis, and Epithelial-to-Mesenchymal Transition by Nitric Oxide-Dependent Post-Translational Modifications. Antioxid Redox Signal 2018; 29:1312-1332. [PMID: 28795583 DOI: 10.1089/ars.2017.7072] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
SIGNIFICANCE Nitric oxide (NO) is a physiopathological messenger generating different reactive nitrogen species (RNS) according to hypoxic, acidic and redox conditions. Recent Advances: RNS and reactive oxygen species (ROS) promote relevant post-translational modifications, such as nitrosation, nitration, and oxidation, in critical components of cell proliferation and death, epithelial-to-mesenchymal transition, and metastasis. CRITICAL ISSUES The pro- or antitumoral properties of NO are dependent on local concentration, redox state, cellular status, duration of exposure, and compartmentalization of NO generation. The increased expression of NO synthase has been associated with cancer progression. However, the experimental strategies leading to high intratumoral NO generation have been shown to exert antitumoral properties. The effect of NO and ROS on cell signaling is critically altered by factors modulating tumor progression such as oxygen content, metabolism, and inflammatory response. The review describes the alteration of key components involved in cell survival and death, metabolism, and metastasis induced by RNS- and ROS-related post-translational modifications. FUTURE DIRECTIONS The identification of the molecular targets affected by nitrosation, nitration, and oxidation, as well as their interactions with other post-translational modifications, will improve the understanding on the complex signaling and cell fate decision in cancer. The therapeutic NO-based strategies have to address the complex crosstalk among NO and ROS with regard to critical components affecting tumor cell survival, metabolism, and metastasis in the progression of cancer, as well as close interaction with ionizing radiation and chemotherapy.
Collapse
Affiliation(s)
- Raúl González
- 1 Institute of Biomedicine of Seville (IBiS), IBiS/"Virgen del Rocío" University Hospital/CSIC/University of Seville , Seville, Spain
| | - Francisco J Molina-Ruiz
- 1 Institute of Biomedicine of Seville (IBiS), IBiS/"Virgen del Rocío" University Hospital/CSIC/University of Seville , Seville, Spain
| | - J Antonio Bárcena
- 2 Department of Biochemistry and Molecular Biology, Maimonides Biomedical Research Institute of Córdoba (IMIBIC), University of Córdoba , Córdoba, Spain
| | - C Alicia Padilla
- 2 Department of Biochemistry and Molecular Biology, Maimonides Biomedical Research Institute of Córdoba (IMIBIC), University of Córdoba , Córdoba, Spain
| | - Jordi Muntané
- 3 Department of General Surgery, "Virgen del Rocío" University Hospital/IBiS/CSIC/University of Seville , Seville, Spain .,4 Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd) , Madrid, Spain
| |
Collapse
|
28
|
Abstract
Researchers reconstitute caveolae assembly in cell-free extracts to investigate how these membrane microdomains interact with signaling proteins. Researchers reconstitute caveolae assembly in cell-free extracts to investigate how these membrane microdomains interact with signaling proteins.
Collapse
|
29
|
Jung W, Sierecki E, Bastiani M, O'Carroll A, Alexandrov K, Rae J, Johnston W, Hunter DJB, Ferguson C, Gambin Y, Ariotti N, Parton RG. Cell-free formation and interactome analysis of caveolae. J Cell Biol 2018; 217:2141-2165. [PMID: 29716956 PMCID: PMC5987714 DOI: 10.1083/jcb.201707004] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 01/24/2018] [Accepted: 03/29/2018] [Indexed: 02/07/2023] Open
Abstract
Caveolae are linked to signaling protein regulation through interactions with caveolins. We describe a cell-free system for the biogenesis of caveolae and show phosphorylated-caveolins preferentially bind signaling proteins. Our validation in vivo shows that phosphorylated CAV1 recruits TRAF2 to the endosome to form a signaling platform. Caveolae have been linked to the regulation of signaling pathways in eukaryotic cells through direct interactions with caveolins. Here, we describe a cell-free system based on Leishmania tarentolae (Lt) extracts for the biogenesis of caveolae and show its use for single-molecule interaction studies. Insertion of expressed caveolin-1 (CAV1) into Lt membranes was analogous to that of caveolin in native membranes. Electron tomography showed that caveolins generate domains of precise size and curvature. Cell-free caveolae were used in quantitative assays to test the interaction of membrane-inserted caveolin with signaling proteins and to determine the stoichiometry of interactions. Binding of membrane-inserted CAV1 to several proposed binding partners, including endothelial nitric-oxide synthase, was negligible, but a small number of proteins, including TRAF2, interacted with CAV1 in a phosphorylation-(CAV1Y14)–stimulated manner. In cells subjected to oxidative stress, phosphorylated CAV1 recruited TRAF2 to the early endosome forming a novel signaling platform. These findings lead to a novel model for cellular stress signaling by CAV1.
Collapse
Affiliation(s)
- WooRam Jung
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Emma Sierecki
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Michele Bastiani
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Ailis O'Carroll
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Kirill Alexandrov
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - James Rae
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Wayne Johnston
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Dominic J B Hunter
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Charles Ferguson
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Yann Gambin
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Nicholas Ariotti
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia
| | - Robert G Parton
- The University of Queensland, The Institute for Molecular Bioscience, Brisbane, Queensland, Australia .,The University of Queensland, The Centre for Microscopy and Microanalysis, Brisbane, Queensland, Australia
| |
Collapse
|
30
|
Naruishi K, Nagata T. Biological effects of interleukin‐6 on Gingival Fibroblasts: Cytokine regulation in periodontitis. J Cell Physiol 2018; 233:6393-6400. [DOI: 10.1002/jcp.26521] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 01/30/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Koji Naruishi
- Department of Periodontology and Endodontology, Institute of Biomedical SciencesTokushima University Graduate SchoolKuramotoTokushimaJapan
| | - Toshihiko Nagata
- Department of Periodontology and Endodontology, Institute of Biomedical SciencesTokushima University Graduate SchoolKuramotoTokushimaJapan
| |
Collapse
|
31
|
Yang J, Zhu T, Zhao R, Gao D, Cui Y, Wang K, Guo Y. Caveolin-1 Inhibits Proliferation, Migration, and Invasion of Human Colorectal Cancer Cells by Suppressing Phosphorylation of Epidermal Growth Factor Receptor. Med Sci Monit 2018; 24:332-341. [PMID: 29339715 PMCID: PMC5783188 DOI: 10.12659/msm.907782] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background Although downregulation of caveolin-1 (Cav-1), which is a key constituent of membrane caveolae and a regulator of cellular processes, is associated with colorectal cancer (CRC), its involvement in the disease progression is largely unknown. This study aimed to explore the role of Cav-1 in CRC and the associated mechanisms. Material/Methods Fresh tissues from patients with CRC and human CRC SW480 cells were used to evaluate Cav-1 and Ki-67 expression using immunohistochemistry and Western blotting. The MTS and Transwell assays were performed to determine the effects of Cav-1 overexpression via pcDNA3.1/Cav-1 plasmid on cell proliferation and metastasis. The effect of Cav-1 on the epidermal growth factor receptor (EGFR) activation was evaluated by Western blotting. The correlation of Cav-1 expression with clinicopathological factors was statistically analyzed. Results Overexpression of Cav-1 significantly reduced proliferation, migration, and invasion of SW480 cancer cells in vitro. The EGF-induced phosphorylation of EGFR and activations of the RAF-MEK-ERK and PI3K-AKT pathways were adversely regulated by Cav-1 overexpression in vitro. In 76 cases of CRC patients with EGFR expression, a negative correlation was observed between the level of Cav-1 and tumor-node-metastasis stage, lymph node metastasis, and distant metastasis (All p<0.05). Finally, the expression level of Cav-1 was negatively correlated with that of Ki-67. Conclusions This report is the first to show that overexpression of Cav-1significantly inhibits the proliferation, migration, and invasion potential of SW480 cells, possibly through reducing EGF-induced EGFR activation. High Cav-1 expression level may be a predictor of positive outcomes in patients with colorectal cancer.
Collapse
Affiliation(s)
- Juanli Yang
- Department of Pain and Rehabilitation, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Tienian Zhu
- Department of Immunology, Hebei Medical University, Key Laboratory of Immune Mechanism and Intervention in Serious Diseases in Hebei Province, Shijiazhuang, Hebei, China (mainland).,Department of Medical Oncology, Bethune International Peace Hospital, Shijiazhuang, Hebei, China (mainland)
| | - Ruijing Zhao
- Department of Immunology, Hebei Medical University, Key Laboratory of Immune Mechanism and Intervention in Serious Diseases in Hebei Province, Shijiazhuang, Hebei, China (mainland)
| | - Dongmei Gao
- Department of Medical Oncology, Bethune International Peace Hospital, Shijiazhuang, Hebei, China (mainland)
| | - Yujie Cui
- Department of Medical Oncology, Bethune International Peace Hospital, Shijiazhuang, Hebei, China (mainland)
| | - Kun Wang
- Department of Transfusion, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (mainland)
| | - Yanli Guo
- Laboratory of Pathology, Hebei Cancer Institute, Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (mainland)
| |
Collapse
|
32
|
Duran CL, Howell DW, Dave JM, Smith RL, Torrie ME, Essner JJ, Bayless KJ. Molecular Regulation of Sprouting Angiogenesis. Compr Physiol 2017; 8:153-235. [PMID: 29357127 DOI: 10.1002/cphy.c160048] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The term angiogenesis arose in the 18th century. Several studies over the next 100 years laid the groundwork for initial studies performed by the Folkman laboratory, which were at first met with some opposition. Once overcome, the angiogenesis field has flourished due to studies on tumor angiogenesis and various developmental models that can be genetically manipulated, including mice and zebrafish. In addition, new discoveries have been aided by the ability to isolate primary endothelial cells, which has allowed dissection of various steps within angiogenesis. This review will summarize the molecular events that control angiogenesis downstream of biochemical factors such as growth factors, cytokines, chemokines, hypoxia-inducible factors (HIFs), and lipids. These and other stimuli have been linked to regulation of junctional molecules and cell surface receptors. In addition, the contribution of cytoskeletal elements and regulatory proteins has revealed an intricate role for mobilization of actin, microtubules, and intermediate filaments in response to cues that activate the endothelium. Activating stimuli also affect various focal adhesion proteins, scaffold proteins, intracellular kinases, and second messengers. Finally, metalloproteinases, which facilitate matrix degradation and the formation of new blood vessels, are discussed, along with our knowledge of crosstalk between the various subclasses of these molecules throughout the text. Compr Physiol 8:153-235, 2018.
Collapse
Affiliation(s)
- Camille L Duran
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - David W Howell
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Jui M Dave
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Rebecca L Smith
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| | - Melanie E Torrie
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, USA
| | - Jeffrey J Essner
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, Iowa, USA
| | - Kayla J Bayless
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, Texas, USA
| |
Collapse
|
33
|
Udayantha HMV, Bathige SDNK, Priyathilaka TT, Lee S, Kim MJ, Lee J. Identification and characterization of molluscan caveolin-1 ortholog from Haliotis discus discus: Possible involvement in embryogenesis and host defense mechanism against pathogenic stress. Gene Expr Patterns 2017; 27:85-92. [PMID: 29128397 DOI: 10.1016/j.gep.2017.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 06/13/2017] [Accepted: 11/06/2017] [Indexed: 02/05/2023]
Abstract
Caveolins are principal membrane proteins of caveolae that play a central role in signal transduction, substrate transport, and membrane trafficking in various cell types. Numerous studies have reported the crucial role of caveolin-1 (CAV1) in response to invading microbes; yet, very little is known about molluscan CAV1. In this study, we identified and characterized CAV1 ortholog from the disk abalone, Haliotis discus discus (HdCAV1). The cDNA sequence of HdCAV1 is 826 bp long and encodes a 127-amino acid polypeptide. Characteristic caveolin superfamily domain (Glu3 - Lys126) and two possible transmembrane domains (Cys48 - Tyr67 and Ile103 - Phe120) were identified in the HdCAV1 protein. Homology analysis revealed that HdCAV1 shared higher identity (>47%) with molluscans, but lower identity with other species. Phylogenetic tree constructed by the neighbor-joining (NJ) method revealed a distinct evolutionary pathway for molluscans. Transcriptional analysis by SYBR Green qPCR showed the highest expression of HdCAV1 mRNA in late veliger stage, as compared to that in other embryonic developmental stages of disk abalone. In adult animals, gill tissue showed highest HdCAV1 transcript levels under normal physiological condition. Stimulations with two bacteria (Vibrio parahaemolyticus and Listeria monocytogenes), viral hemorrhagic septicemia virus, and two pathogen-associated molecular patterns (LPS and poly I:C) significantly modulated the expression of HdCAV1 transcripts. Collectively, these data suggest that CAV1 plays an important role in embryogenesis and host immune defense in disk abalone.
Collapse
Affiliation(s)
- H M V Udayantha
- Department of Marine Life Sciences, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Department of Fisheries and Aquaculture, Faculty of Fisheries and Marine Sciences and Technology, University of Ruhuna, Matara, Sri Lanka
| | - S D N K Bathige
- Department of Marine Life Sciences, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Sri Lanka Institute of Nanotechnology (SLINTEC), Nanotechnology and Science Park, Mahenwatta, Pitipana, Homagama, Sri Lanka
| | - Thanthrige Thiunuwan Priyathilaka
- Department of Marine Life Sciences, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea
| | - Sukkyoung Lee
- Department of Marine Life Sciences, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea
| | - Myoung-Jin Kim
- Department of Marine Life Sciences, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea.
| | - Jehee Lee
- Department of Marine Life Sciences, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province 63243, Republic of Korea.
| |
Collapse
|
34
|
Marsboom G, Chen Z, Yuan Y, Zhang Y, Tiruppathi C, Loyd JE, Austin ED, Machado RF, Minshall RD, Rehman J, Malik AB. Aberrant caveolin-1-mediated Smad signaling and proliferation identified by analysis of adenine 474 deletion mutation (c.474delA) in patient fibroblasts: a new perspective on the mechanism of pulmonary hypertension. Mol Biol Cell 2017; 28:1177-1185. [PMID: 28468941 PMCID: PMC5415014 DOI: 10.1091/mbc.e16-11-0790] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 03/01/2017] [Accepted: 03/02/2017] [Indexed: 01/04/2023] Open
Abstract
A heterozygous caveolin-1 c.474delA mutation has been identified in a family with heritable pulmonary arterial hypertension (PAH). This frameshift mutation leads to a caveolin-1 protein that contains all known functional domains but has a change in only the final 20 amino acids of the C-terminus. Here we studied how this mutation alters caveolin-1 function, using patient-derived fibroblasts. Transmission electron microscopy showed that fibroblasts carrying the c.474delA mutation form typical caveolae. Expression of mutated caveolin-1 in caveolin-1-null mouse fibroblasts failed to induce formation of caveolae due to retention of the mutated protein in the endoplasmic reticulum. However, coexpression of wild-type caveolin-1 with mutated caveolin-1 restored the ability to form caveolae. Importantly, fibroblasts carrying the mutation showed twofold increase in proliferation rate associated with hyperphosphorylation of Smad1/5/8. This mutation impaired the antiproliferative function of caveolin-1. Inhibition of type I TGFβ receptors ALK1/2/3/6 responsible for phosphorylation of Smad1/5/8 reduced the hyperproliferation seen in c.474delA fibroblasts. These results demonstrate the critical role of the final 20 amino acids of caveolin-1 in modulating fibroblast proliferation by dampening Smad signaling and suggest that augmented Smad signaling and fibroblast hyperproliferation are contributing factors in the pathogenesis of PAH in patients with caveolin-1 c.474delA mutation.
Collapse
Affiliation(s)
- Glenn Marsboom
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612
| | - Zhenlong Chen
- Department of Anesthesiology, University of Illinois College of Medicine, Chicago, IL 60612
| | - Yang Yuan
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612
| | - Yanmin Zhang
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612.,Department of Pathology, University of Illinois College of Medicine, Chicago, IL 60612
| | - Chinnaswamy Tiruppathi
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612
| | - James E Loyd
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Eric D Austin
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37232
| | - Roberto F Machado
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612.,Department of Medicine, University of Illinois College of Medicine, Chicago, IL 60612
| | - Richard D Minshall
- Department of Anesthesiology, University of Illinois College of Medicine, Chicago, IL 60612
| | - Jalees Rehman
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612.,Department of Medicine, University of Illinois College of Medicine, Chicago, IL 60612
| | - Asrar B Malik
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612
| |
Collapse
|
35
|
Vangapandu HV, Chen H, Wierda WG, Keating MJ, Korkut A, Gandhi V. Proteomics profiling identifies induction of caveolin-1 in chronic lymphocytic leukemia cells by bone marrow stromal cells. Leuk Lymphoma 2017; 59:1427-1438. [PMID: 28971726 DOI: 10.1080/10428194.2017.1376747] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Chronic lymphocytic leukemia (CLL) is an indolent B-cell malignancy in which cells reside in bone marrow, lymph nodes, and peripheral blood, each of which provides a unique microenvironment. Although the levels of certain proteins are reported to induce, changes in the CLL cell proteome in the presence of bone marrow stromal cells have not been elucidated. Reverse-phase protein array analysis of CLL cells before and 24 h after stromal cell interaction revealed changed levels of proteins that regulate cell cycle, gene transcription, and protein translation. The most hit with respect to both the extent of change in expression level and statistical significance was caveolin-1, which was confirmed with immunoblotting. Caveolin-1 mRNA levels were also upregulated in CLL cells after stromal cell interaction. The induction of caveolin-1 levels was rapid and occurred as early as 1 h. Studies to determine the significance of upregulated caveolin-1 levels in CLL lymphocytes are warranted.
Collapse
Affiliation(s)
- Hima V Vangapandu
- a Department of Experimental Therapeutics , The University of Texas MD Anderson Cancer Center , Houston , TX , USA.,b MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences , Houston , TX , USA
| | - Huiqin Chen
- c Department of Biostatistics , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - William G Wierda
- d Department of Leukemia , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Michael J Keating
- d Department of Leukemia , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Anil Korkut
- e Department of Bioinformatics and Computer Biology , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Varsha Gandhi
- a Department of Experimental Therapeutics , The University of Texas MD Anderson Cancer Center , Houston , TX , USA.,b MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences , Houston , TX , USA.,c Department of Biostatistics , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| |
Collapse
|
36
|
Cholesterol metabolism and glaucoma: Modulation of Muller cell membrane organization by 24S-hydroxycholesterol. Chem Phys Lipids 2017; 207:179-191. [DOI: 10.1016/j.chemphyslip.2017.05.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 05/19/2017] [Accepted: 05/23/2017] [Indexed: 02/04/2023]
|
37
|
Abstract
Over the past decade, interest in caveolae biology has peaked. These small bulb-shaped plasma membrane invaginations of 50-80nm diameter present in most cell types have been upgraded from simple membrane structures to a more complex bona fide organelle. However, although caveolae are involved in several essential cellular functions and pathologies, the underlying molecular mechanisms remain poorly defined. Following the identification of caveolins and cavins as the main caveolae constituents, recent studies have brought new insight into their structural organization as a coat. In this review, we discuss how these new data on caveolae can be integrated in the context of their role in signaling and pathophysiology.
Collapse
|
38
|
Meng F, Saxena S, Liu Y, Joshi B, Wong TH, Shankar J, Foster LJ, Bernatchez P, Nabi IR. The phospho-caveolin-1 scaffolding domain dampens force fluctuations in focal adhesions and promotes cancer cell migration. Mol Biol Cell 2017; 28:2190-2201. [PMID: 28592633 PMCID: PMC5531735 DOI: 10.1091/mbc.e17-05-0278] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 06/02/2017] [Indexed: 12/15/2022] Open
Abstract
Caveolin-1 (Cav1), a major Src kinase substrate phosphorylated on tyrosine-14 (Y14), contains the highly conserved membrane-proximal caveolin scaffolding domain (CSD; amino acids 82-101). Here we show, using CSD mutants (F92A/V94A) and membrane-permeable CSD-competing peptides, that Src kinase-dependent pY14Cav1 regulation of focal adhesion protein stabilization, focal adhesion tension, and cancer cell migration is CSD dependent. Quantitative proteomic analysis of Cav1-GST (amino acids 1-101) pull downs showed sixfold-increased binding of vinculin and, to a lesser extent, α-actinin, talin, and filamin, to phosphomimetic Cav1Y14D relative to nonphosphorylatable Cav1Y14F. Consistently, pY14Cav1 enhanced CSD-dependent vinculin tension in focal adhesions, dampening force fluctuation and synchronously stabilizing cellular focal adhesions in a high-tension mode, paralleling effects of actin stabilization. This identifies pY14Cav1 as a molecular regulator of focal adhesion tension and suggests that functional interaction between Cav1 Y14 phosphorylation and the CSD promotes focal adhesion traction and, thereby, cancer cell motility.
Collapse
Affiliation(s)
- Fanrui Meng
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Sandeep Saxena
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Youtao Liu
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Bharat Joshi
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Timothy H Wong
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Jay Shankar
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Leonard J Foster
- Department of Biochemistry and Molecular Biology and Michael Smith Labs, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Pascal Bernatchez
- James Hogg Research Centre, Institute for Heart + Lung Health, St Paul's Hospital, Vancouver, BC V6Z 1Y6, Canada.,Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Ivan R Nabi
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| |
Collapse
|
39
|
Liu S, Premont RT, Singh S, Rockey DC. Caveolin 1 and G-Protein-Coupled Receptor Kinase-2 Coregulate Endothelial Nitric Oxide Synthase Activity in Sinusoidal Endothelial Cells. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:896-907. [PMID: 28162981 DOI: 10.1016/j.ajpath.2016.11.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 11/23/2016] [Accepted: 11/28/2016] [Indexed: 12/14/2022]
Abstract
Liver injury leads to a vasculopathy in which post-translational modifications of endothelial nitric oxide synthase (eNOS) lead to impaired nitric oxide synthesis. We hypothesized that caveolin 1 (CAV1), a well-known eNOS interactor, regulates eNOS activity in sinusoidal endothelial cells (SECs) via its interaction with G-protein-coupled receptor kinase-2 (GRK2) that also post-translationally modifies eNOS. Liver injury with portal hypertension was established using bile duct ligation in rats. CAV1 function was modified using a CAV1 scaffolding domain construct and cDNAs encoding wild-type CAV1, and CAV1 phosphorylation was increased in injured SECs, resulting in increased GRK2-CAV1 interaction and decreased eNOS activity. In injured SECs, endothelin-1 blocked CAV1 phosphorylation induced by CAV1 scaffolding domain, indicating that CAV1 interaction with GRK2 is inversely regulated by endothelin-1 and CAV1 scaffolding domain after liver injury. In addition, after transduction with DNA encoding wild-type CAV1 into SECs isolated from Cav1-deficient mice, GRK2 association with CAV1 was evident, whereas transduction with a dominant negative CAV1 mutated at tyrosine 14 reduced the interaction. Finally, isoproterenol-induced GRK2 phosphorylation enhanced CAV1-GRK2 interaction and reduced eNOS activity. Our data suggest a novel mechanism and model in which CAV1 phosphorylation facilitates CAV1 scaffolding and GRK2-CAV1 interaction, thus clustering eNOS within a complex that inhibits eNOS activity. This process takes place in injured, but not in normal, SECs.
Collapse
Affiliation(s)
- Songling Liu
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Richard T Premont
- Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Shweta Singh
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Don C Rockey
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina.
| |
Collapse
|
40
|
Busija AR, Patel HH, Insel PA. Caveolins and cavins in the trafficking, maturation, and degradation of caveolae: implications for cell physiology. Am J Physiol Cell Physiol 2017; 312:C459-C477. [PMID: 28122734 DOI: 10.1152/ajpcell.00355.2016] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 01/23/2017] [Accepted: 01/24/2017] [Indexed: 01/09/2023]
Abstract
Caveolins (Cavs) are ~20 kDa scaffolding proteins that assemble as oligomeric complexes in lipid raft domains to form caveolae, flask-shaped plasma membrane (PM) invaginations. Caveolae ("little caves") require lipid-lipid, protein-lipid, and protein-protein interactions that can modulate the localization, conformational stability, ligand affinity, effector specificity, and other functions of proteins that are partners of Cavs. Cavs are assembled into small oligomers in the endoplasmic reticulum (ER), transported to the Golgi for assembly with cholesterol and other oligomers, and then exported to the PM as an intact coat complex. At the PM, cavins, ~50 kDa adapter proteins, oligomerize into an outer coat complex that remodels the membrane into caveolae. The structure of caveolae protects their contents (i.e., lipids and proteins) from degradation. Cellular changes, including signal transduction effects, can destabilize caveolae and produce cavin dissociation, restructuring of Cav oligomers, ubiquitination, internalization, and degradation. In this review, we provide a perspective of the life cycle (biogenesis, degradation), composition, and physiologic roles of Cavs and caveolae and identify unanswered questions regarding the roles of Cavs and cavins in caveolae and in regulating cell physiology.1.
Collapse
Affiliation(s)
- Anna R Busija
- Department of Anesthesiology, University of California, San Diego, La Jolla, California.,Department of Pharmacology, University of California, San Diego, La Jolla, California
| | - Hemal H Patel
- Department of Anesthesiology, University of California, San Diego, La Jolla, California
| | - Paul A Insel
- Department of Medicine, University of California, San Diego, La Jolla, California; and .,Department of Pharmacology, University of California, San Diego, La Jolla, California
| |
Collapse
|
41
|
Shihata WA, Michell DL, Andrews KL, Chin-Dusting JPF. Caveolae: A Role in Endothelial Inflammation and Mechanotransduction? Front Physiol 2016; 7:628. [PMID: 28066261 PMCID: PMC5168557 DOI: 10.3389/fphys.2016.00628] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 12/02/2016] [Indexed: 12/15/2022] Open
Abstract
Vascular inflammation and disease progression, such as atherosclerosis, are in part a consequence of haemodynamic forces generated by changes in blood flow. The haemodynamic forces, such as shear stress or stretch, interact with vascular endothelial cells, which transduce the mechanical stimuli into biochemical signals via mechanosensors, which can induce an upregulation in pathways involved in inflammatory signaling. However, it is unclear how these mechanosensors respond to shear stress and most significantly what cellular mechanisms are involved in sensing the haemodynamic stimuli. This review explores the transition from shear forces, stretch and pressure to endothelial inflammation and the process of mechanotransduction, specifically highlighting evidence to suggest that caveolae play as a role as mechanosensors.
Collapse
Affiliation(s)
- Waled A Shihata
- Cardiovascular Disease Program and Department of Pharmacology, Biomedical Discovery Institute, Monash UniversityClayton, VIC, Australia; Vascular Pharmacology, Baker IDI Heart and Diabetes InstituteMelbourne, VIC, Australia
| | - Danielle L Michell
- Vascular Pharmacology, Baker IDI Heart and Diabetes Institute Melbourne, VIC, Australia
| | - Karen L Andrews
- Cardiovascular Disease Program and Department of Pharmacology, Biomedical Discovery Institute, Monash UniversityClayton, VIC, Australia; Vascular Pharmacology, Baker IDI Heart and Diabetes InstituteMelbourne, VIC, Australia
| | - Jaye P F Chin-Dusting
- Cardiovascular Disease Program and Department of Pharmacology, Biomedical Discovery Institute, Monash UniversityClayton, VIC, Australia; Vascular Pharmacology, Baker IDI Heart and Diabetes InstituteMelbourne, VIC, Australia
| |
Collapse
|
42
|
Linan-Rico A, Ochoa-Cortes F, Beyder A, Soghomonyan S, Zuleta-Alarcon A, Coppola V, Christofi FL. Mechanosensory Signaling in Enterochromaffin Cells and 5-HT Release: Potential Implications for Gut Inflammation. Front Neurosci 2016; 10:564. [PMID: 28066160 PMCID: PMC5165017 DOI: 10.3389/fnins.2016.00564] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 11/22/2016] [Indexed: 12/12/2022] Open
Abstract
Enterochromaffin (EC) cells synthesize 95% of the body 5-HT and release 5-HT in response to mechanical or chemical stimulation. EC cell 5-HT has physiological effects on gut motility, secretion and visceral sensation. Abnormal regulation of 5-HT occurs in gastrointestinal disorders and Inflammatory Bowel Diseases (IBD) where 5-HT may represent a key player in the pathogenesis of intestinal inflammation. The focus of this review is on mechanism(s) involved in EC cell "mechanosensation" and critical gaps in our knowledge for future research. Much of our knowledge and concepts are from a human BON cell model of EC, although more recent work has included other cell lines, native EC cells from mouse and human and intact mucosa. EC cells are "mechanosensors" that respond to physical forces generated during peristaltic activity by translating the mechanical stimulus (MS) into an intracellular biochemical response leading to 5-HT and ATP release. The emerging picture of mechanosensation includes Piezo 2 channels, caveolin-rich microdomains, and tight regulation of 5-HT release by purines. The "purinergic hypothesis" is that MS releases purines to act in an autocrine/paracrine manner to activate excitatory (P2Y1, P2Y4, P2Y6, and A2A/A2B) or inhibitory (P2Y12, A1, and A3) receptors to regulate 5-HT release. MS activates a P2Y1/Gαq/PLC/IP3-IP3R/SERCA Ca2+signaling pathway, an A2A/A2B-Gs/AC/cAMP-PKA signaling pathway, an ATP-gated P2X3 channel, and an inhibitory P2Y12-Gi/o/AC-cAMP pathway. In human IBD, P2X3 is down regulated and A2B is up regulated in EC cells, but the pathophysiological consequences of abnormal mechanosensory or purinergic 5-HT signaling remain unknown. EC cell mechanosensation remains poorly understood.
Collapse
Affiliation(s)
- Andromeda Linan-Rico
- Department of Anesthesiology, Wexner Medical Center at Ohio State UniversityColumbus, OH, USA; CONACYT-Centro Universitario de Investigaciones Biomedicas, University of ColimaColima, Mexico
| | - Fernando Ochoa-Cortes
- Department of Anesthesiology, Wexner Medical Center at Ohio State University Columbus, OH, USA
| | - Arthur Beyder
- Enteric Neuroscience Program, Division of Gastroenterology and Hepatology, Department of Physiology and Biomedical Engineering, Mayo Clinic Rochester, MN, USA
| | - Suren Soghomonyan
- Department of Anesthesiology, Wexner Medical Center at Ohio State University Columbus, OH, USA
| | - Alix Zuleta-Alarcon
- Department of Anesthesiology, Wexner Medical Center at Ohio State University Columbus, OH, USA
| | - Vincenzo Coppola
- SBS-Cancer Biology and Genetics, Ohio State University Columbus, OH, USA
| | - Fievos L Christofi
- Department of Anesthesiology, Wexner Medical Center at Ohio State University Columbus, OH, USA
| |
Collapse
|
43
|
Zhang Y, Ran K, Zhang SB, Jiang L, Wang D, Li ZJ. Dexmedetomidine may upregulate the expression of caveolin‑1 in lung tissues of rats with sepsis and improve the short‑term outcome. Mol Med Rep 2016; 15:635-642. [PMID: 28000867 PMCID: PMC5364843 DOI: 10.3892/mmr.2016.6050] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 11/10/2016] [Indexed: 12/22/2022] Open
Abstract
Dexmedetomidine (DXM) is a selective α2-adrenoceptor (α2‑AR) and imidazoline receptor (IR) agonist that has been reported to regulate inflammatory responses mediated by diverse signaling pathways through α2‑AR. The majority of the reported receptors or downstream molecules have been demonstrated to locate with caveolin‑1, a protein suggested to participate in regulating Toll‑like receptor 4 (TLR4)‑mediated inflammatory responses and the pathogen endocytosis capability of macrophages. The present study hypothesized that DXM may influence these pathways by regulating the expression of caveolin‑1 and mediating the subsequent effects. Using a cecal‑ligation and puncture‑induced rat sepsis model, it was initially observed that pre‑emptive DXM is able to upregulate and stabilize the amount of caveolin‑1 expression, which may be partly antagonized by both α2‑AR and the IR antagonist atepamezole (APZ). The pathophysiological parameters indicated that DXM is able to inhibit secondary lung injury, in addition to the rise of body temperature and arterial lactate accumulation, however it marginally increased arterial glucose and the murine sepsis score, which can be largely antagonized by APZ. The overall effect was beneficial and improved the 24‑h cumulative survival rate of rats with sepsis. In conclusion, preemptive clinical sedative doses of DXM may upregulate the expression of caveolin‑1 downregulated by sepsis, which may contribute to the inhibition of inflammatory pathways such as TLR4‑mediated pathways. Furthermore, DXM may favor the improvement of short‑term outcomes by the regulation of other metabolic pathways.
Collapse
Affiliation(s)
- Yun Zhang
- Department of Anesthesiology, The Second XiangYa Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Ke Ran
- Department of Anesthesiology, The Second XiangYa Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Shu-Bin Zhang
- Department of Cell Biology, School of Life Science, Central South University, Changsha, Hunan 410013, P.R. China
| | - Lili Jiang
- Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao, Shandong 266005, P.R. China
| | - Dan Wang
- Department of Anesthesiology, The Second XiangYa Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Zhi-Jian Li
- Department of Anesthesiology, The Second XiangYa Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| |
Collapse
|
44
|
Chakrabarti S, Chang A, Liu NJ, Gintzler AR. Chronic opioid treatment augments caveolin-1 scaffolding: relevance to stimulatory μ-opioid receptor adenylyl cyclase signaling. J Neurochem 2016; 139:737-747. [PMID: 27726130 DOI: 10.1111/jnc.13852] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 08/21/2016] [Accepted: 09/15/2016] [Indexed: 01/25/2023]
Abstract
Caveolin-1 is the predominant structural protein of caveolae, a subset of (lipid) membrane rafts that compartmentalize cell signaling. Caveolin-1 binds most to G protein-coupled receptors and their signaling partners, thereby enhancing interactions among signaling cascade components and the relative activation of specific G protein-coupled pathways. This study reveals that chronic opioid exposure of μ-opioid receptor (MOR) expressing Chinese hamster ovary cells (MOR-CHO) and chronic in vivo morphine exposure of rat spinal cord augmented recruitment of multiple components of MOR-adenylyl cyclase (AC) stimulatory signaling by caveolin-1. Strikingly, in MOR-CHO and spinal cord, blocking the caveolin-1 scaffolding domain substantially attenuated the chronic morphine-induced increased interaction of caveolin-1 with MOR, Gsα, protein phosphatase 2A (PP2A), and AC. Chronic morphine treatment also increased interactions among the above signaling proteins, thus enabling sufentanil to stimulate (rather than inhibit) cAMP production within lipid membrane microdomains. The latter finding underscores the functionality of augmented interactions among MOR, Gs α, PP2A, and AC. In the aggregate, our data strongly suggest that augmented caveolin-1 scaffolding undergirds the ability of chronic opioids to recruit an ancillary signaling pathway by acting as an organizing template for MOR-Gs α-AC signaling and delimiting the membrane compartment(s) in which it occurs. Since caveolin-1 binds to a wide spectrum of signaling molecules, altered caveolin-1 scaffolding following chronic opioid treatment is likely to pertain to most, if not all, MOR signaling partners. The chronic morphine-induced trigger that augments caveolin-1 scaffolding could represent a seminal perturbation that initiates the wide spectrum of adaptations thought to contribute to opioid tolerance and dependence.
Collapse
Affiliation(s)
- Sumita Chakrabarti
- Department of Obstetrics and Gynecology, State University of New York, Downstate Medical Center, Brooklyn, New York, USA
| | - Andrew Chang
- Department of Obstetrics and Gynecology, State University of New York, Downstate Medical Center, Brooklyn, New York, USA
| | - Nai-Jiang Liu
- Department of Obstetrics and Gynecology, State University of New York, Downstate Medical Center, Brooklyn, New York, USA
| | - Alan R Gintzler
- Department of Obstetrics and Gynecology, State University of New York, Downstate Medical Center, Brooklyn, New York, USA
| |
Collapse
|
45
|
Gu X, Reagan AM, McClellan ME, Elliott MH. Caveolins and caveolae in ocular physiology and pathophysiology. Prog Retin Eye Res 2016; 56:84-106. [PMID: 27664379 DOI: 10.1016/j.preteyeres.2016.09.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 09/15/2016] [Accepted: 09/20/2016] [Indexed: 12/14/2022]
Abstract
Caveolae are specialized, invaginated plasma membrane domains that are defined morphologically and by the expression of signature proteins called, caveolins. Caveolae and caveolins are abundant in a variety of cell types including vascular endothelium, glia, and fibroblasts where they play critical roles in transcellular transport, endocytosis, mechanotransduction, cell proliferation, membrane lipid homeostasis, and signal transduction. Given these critical cellular functions, it is surprising that ablation of the caveolae organelle does not result in lethality suggesting instead that caveolae and caveolins play modulatory roles in cellular homeostasis. Caveolar components are also expressed in ocular cell types including retinal vascular cells, Müller glia, retinal pigment epithelium (RPE), conventional aqueous humor outflow cells, the corneal epithelium and endothelium, and the lens epithelium. In the eye, studies of caveolae and other membrane microdomains (i.e., "lipid rafts") have lagged behind what is a substantial body of literature outside vision science. However, interest in caveolae and their molecular components has increased with accumulating evidence of important roles in vision-related functions such as blood-retinal barrier homeostasis, ocular inflammatory signaling, pathogen entry at the ocular surface, and aqueous humor drainage. The recent association of CAV1/2 gene loci with primary open angle glaucoma and intraocular pressure has further enhanced the need to better understand caveolar functions in the context of ocular physiology and disease. Herein, we provide the first comprehensive review of literature on caveolae, caveolins, and other membrane domains in the context of visual system function. This review highlights the importance of caveolae domains and their components in ocular physiology and pathophysiology and emphasizes the need to better understand these important modulators of cellular function.
Collapse
Affiliation(s)
- Xiaowu Gu
- Department of Ophthalmology/Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Alaina M Reagan
- Department of Ophthalmology/Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Mark E McClellan
- Department of Ophthalmology/Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Michael H Elliott
- Department of Ophthalmology/Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
| |
Collapse
|
46
|
Erb SJ, Schappi JM, Rasenick MM. Antidepressants Accumulate in Lipid Rafts Independent of Monoamine Transporters to Modulate Redistribution of the G Protein, Gαs. J Biol Chem 2016; 291:19725-19733. [PMID: 27432886 DOI: 10.1074/jbc.m116.727263] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Indexed: 12/22/2022] Open
Abstract
Depression is a significant public health problem for which currently available medications, if effective, require weeks to months of treatment before patients respond. Previous studies have shown that the G protein responsible for increasing cAMP (Gαs) is increasingly localized to lipid rafts in depressed subjects and that chronic antidepressant treatment translocates Gαs from lipid rafts. Translocation of Gαs, which shows delayed onset after chronic antidepressant treatment of rats or of C6 glioma cells, tracks with the delayed onset of therapeutic action of antidepressants. Because antidepressants appear to specifically modify Gαs localized to lipid rafts, we sought to determine whether structurally diverse antidepressants accumulate in lipid rafts. Sustained treatment of C6 glioma cells, which lack 5-hydroxytryptamine transporters, showed marked concentration of several antidepressants in raft fractions, as revealed by increased absorbance and by mass fingerprint. Closely related molecules without antidepressant activity did not concentrate in raft fractions. Thus, at least two classes of antidepressants accumulate in lipid rafts and effect translocation of Gαs to the non-raft membrane fraction, where it activates the cAMP-signaling cascade. Analysis of the structural determinants of raft localization may both help to explain the hysteresis of antidepressant action and lead to design and development of novel substrates for depression therapeutics.
Collapse
Affiliation(s)
- Samuel J Erb
- From the Departments of Biopharmaceutical Sciences
| | | | - Mark M Rasenick
- From the Departments of Biopharmaceutical Sciences, .,Physiology and Biophysics, and.,Psychiatry, University of Illinois at Chicago, Chicago, Illinois 60612 and.,the Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612
| |
Collapse
|
47
|
Caveolin-1/-3: therapeutic targets for myocardial ischemia/reperfusion injury. Basic Res Cardiol 2016; 111:45. [PMID: 27282376 DOI: 10.1007/s00395-016-0561-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 05/05/2016] [Accepted: 05/06/2016] [Indexed: 01/20/2023]
Abstract
Myocardial ischemia/reperfusion (I/R) injury is a major cause of morbidity and mortality worldwide. Caveolae, caveolin-1 (Cav-1), and caveolin-3 (Cav-3) are essential for the protective effects of conditioning against myocardial I/R injury. Caveolins are membrane-bound scaffolding proteins that compartmentalize and modulate signal transduction. In this review, we introduce caveolae and caveolins and briefly describe the interactions of caveolins in the cardiovascular diseases. We also review the roles of Cav-1/-3 in protection against myocardial ischemia and I/R injury, and in conditioning. Finally, we suggest several potential research avenues that may be of interest to clinicians and basic scientists. The information included, herein, is potentially useful for the design of future studies and should advance the investigation of caveolins as therapeutic targets.
Collapse
|
48
|
Chen CH, Chang WH, Su KY, Ku WH, Chang GC, Hong QS, Hsiao YJ, Chen HC, Chen HY, Wu R, Yang PC, Chen JJW, Yu SL. HLJ1 is an endogenous Src inhibitor suppressing cancer progression through dual mechanisms. Oncogene 2016; 35:5674-5685. [DOI: 10.1038/onc.2016.106] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 12/30/2015] [Accepted: 01/04/2016] [Indexed: 12/30/2022]
|
49
|
Donati RJ, Schappi J, Czysz AH, Jackson A, Rasenick MM. Differential effects of antidepressants escitalopram versus lithium on Gs alpha membrane relocalization. BMC Neurosci 2015; 16:40. [PMID: 26162823 PMCID: PMC4499192 DOI: 10.1186/s12868-015-0178-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 07/06/2015] [Indexed: 01/08/2023] Open
Abstract
Background Plasma membrane localization can play a significant role in the ultimate function of certain proteins. Specific membrane domains like lipid rafts have been shown to be inhibitory domains to a number of signaling proteins, including Gsα, and chronic antidepressant treatment facilitates Gs signaling by removing Gsα form lipid rafts. The intent of this study is to compare the effects of the selective serotnin reuptake inhibitor, escitalopram, with that of the mood stabilizing drug, lithium. Results There are a number of mechanisms of action proposed for lithium as a mood stabilizing agent, but the interactions between G proteins (particularly Gs) and mood stabilizing drugs are not well explored. Of particular interest was the possibility that there was some effect of mood stabilizers on the association between Gsα and cholesterol-rich membrane microdomains (lipid rafts), similar to that seen with long-term antidepressant treatment. This was examined by biochemical and imaging (fluorescence recovery after photobleaching: FRAP) approaches. Results indicate that escitalopram was effective at liberating Gsα from lipid rafts while lithium was not. Conclusions There are a number of drug treatments for mood disorders and yet there is no unifying hypothesis for a cellular or molecular basis of action. It is evident that there may in fact not be a single mechanism, but rather a number of different mechanisms that converge at a common point. The results of this study indicate that the mood stabilizing agent, lithium, and the selective serotonin reuptake inhibitor, escitalopram, act on their cellular targets through mutually exclusive pathways. These results also validate the hypothesis that translocation of Gsα from lipid rafts could serve as a biosignature for antidepressant action.
Collapse
Affiliation(s)
- Robert J Donati
- Departments of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL, 60612-7342, USA. .,Basic and Health Science Department, Illinois College of Optometry, Chicago, IL, 60616, USA.
| | - Jeffrey Schappi
- Departments of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL, 60612-7342, USA.
| | - Andrew H Czysz
- Departments of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL, 60612-7342, USA.
| | - Alexander Jackson
- Departments of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL, 60612-7342, USA
| | - Mark M Rasenick
- Departments of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL, 60612-7342, USA. .,The Psychiatric Institute, College of Medicine, University of Illinois at Chicago, Chicago, IL, 60612-7342, USA.
| |
Collapse
|
50
|
Luan TY, Zhu TN, Cui YJ, Zhang G, Song XJ, Gao DM, Zhang YM, Zhao QL, Liu S, Su TY, Zhao RJ. Expression of caveolin-1 is correlated with lung adenocarcinoma proliferation, migration, and invasion. Med Oncol 2015; 32:207. [PMID: 26094077 DOI: 10.1007/s12032-015-0644-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 05/20/2015] [Indexed: 02/05/2023]
Abstract
Both tumor suppressor and tumor promoter roles, which are dependent on the tumor type, have been described for caveolin-1 (CAV-1). Because CAV-1 can modulate cell signaling, we tested the hypothesis that it regulates lung adenocarcinoma cell proliferation and metastasis via modulation of epidermal growth factor receptor (EGFR) activity. The lung adenocarcinoma cell line, GLC-82, was transfected with pcDNA3.1CAV-1 plasmid, before cell proliferation, migration, and invasion were analyzed. In the in vivo xenograft model, the relationship between the CAV-1 expression and EGFR phosphorylation and signaling was assessed by western blot analysis. The relationship between the CAV-1 as well as Ki67 expression and the clinicopathological characteristics of 68 lung adenocarcinoma patients was also examined using immunohistochemistry. Overexpression of CAV-1 significantly increased GLC-82 proliferation (p < 0.001), migration (p < 0.001), and invasion (p = 0.002) as well as EGFR and ERK phosphorylation (p < 0.05). The GLC-82/CAV-1 cell tumors were also significantly larger than those of control cells (all p ≤ 0.05). In lung adenocarcinoma patients, CAV-1 expression was positively correlated with lymph node metastasis and cancer stage. Finally, CAV-1 expression was associated with the expression of Ki-67, a marker of cell proliferation. CAV-1 enhanced GLC-82 cell proliferation, migration, and invasion possibly through EGFR and ERK signaling. Furthermore, the relationship of CAV-1 with Ki67 expression, a marker of proliferative capacity, in lung adenocarcinoma samples is suggestive of its role in disease progression. Further studies are required to confirm the role of CAV-1 in the metastasis of lung adenocarcinoma as well as its potential prognostic and therapeutic value.
Collapse
Affiliation(s)
- Tian-Yan Luan
- Department of Oncology, Hebei Medical University, Shijiazhuang, 050017, Hebei, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|