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Caveolin1

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https://www.readbyqxmd.com/read/29603400/a-guide-to-studying-human-dermal-adipocytes-in-situ
#1
Carina Nicu, Jennifer Pople, Laura Bonsell, Ranjit Bhogal, David M Ansell, Ralf Paus
Dermal white adipose tissue (DWAT) is a main component of human skin, composed of individual lipid-laden mesenchymal cells known as dermal adipocytes (DAs). Besides their well-known role in lipid storage and release, DAs also promote skin immunity, wound healing and hair follicle cycling and are important players in cutaneous neuro-endocrinology. The ever-growing insights into DWAT functions, albeit mostly in mice, have invited speculation that it may be involved in multiple skin diseases ranging from fibrosis to alopecia and psoriasis, thus designating human DWAT a clinically relevant, but as yet insufficiently investigated skin compartment...
March 30, 2018: Experimental Dermatology
https://www.readbyqxmd.com/read/29412792/the-effects-of-caveolin1-on-%C3%AE-cell-proliferation
#2
Haicheng Li, Hangya Peng, Haixia Xu, Fen Xu, Shuo Lin, Keyi Lin, Wen Zeng, Longyi Zeng
Our study aims to access the influence of caveolin1 (CAV1) on β cell expression profiles. We knocked down the expression of CAV1 in both NIT-1 cells and islets isolated from C57BL/6J mice using an RNA interference technique, which was realized by the transfer of an shRNA vector targeting CAV1 mRNA into NIT-1 cells or islets through latent virus infection. First, we identified the change in gene expression profiles in islets, in which the CAV1 expression level was down-regulated, as ascertained by mouse gene expression microarray, and the results showed that pathways related to β cell proliferation and pancreatic secretion functions were significantly influenced...
January 31, 2018: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29379878/caveolin1-identifies-a-specific-subpopulation-of-cerebral-cortex-callosal-projection-neurons-cpn-including-dual-projecting-cortical-callosal-frontal-projection-neurons-cpn-fpn
#3
Jessica L MacDonald, Ryann M Fame, Eva M Gillis-Buck, Jeffrey D Macklis
The neocortex is composed of many distinct subtypes of neurons that must form precise subtype-specific connections to enable the cortex to perform complex functions. Callosal projection neurons (CPN) are the broad population of commissural neurons that connect the cerebral hemispheres via the corpus callosum (CC). Currently, how the remarkable diversity of CPN subtypes and connectivity is specified, and how they differentiate to form highly precise and specific circuits, are largely unknown. We identify in mouse that the lipid-bound scaffolding domain protein Caveolin 1 (CAV1) is specifically expressed by a unique subpopulation of Layer V CPN that maintain dual ipsilateral frontal projections to premotor cortex...
January 2018: ENeuro
https://www.readbyqxmd.com/read/29237817/an-arf6-and-caveolae-dependent-pathway-links-hemidesmosome-remodeling-and-mechanoresponse
#4
Naël Osmani, Julien Pontabry, Jordi Comelles, Nina Fekonja, Jacky G Goetz, Daniel Riveline, Elisabeth Georges-Labouesse, Michel Labouesse
Hemidesmosomes (HDs) are epithelial-specific cell-matrix adhesions that stably anchor the intracellular keratin network to the extracellular matrix. Although their main role is to protect the epithelial sheet from external mechanical strain, how HDs respond to mechanical stress remains poorly understood. Here we identify a pathway essential for HD remodeling and outline its role with respect to α6β4 integrin recycling. We find that α6β4 integrin chains localize to the plasma membrane, caveolae, and ADP-ribosylation factor-6+ (Arf6+) endocytic compartments...
February 15, 2018: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/29166603/caveolin1-is-required-for-th1-cell-infiltration-but-not-tight-junction-remodeling-at-the-blood-brain-barrier-in-autoimmune-neuroinflammation
#5
Sarah E Lutz, Julian R Smith, Dae Hwan Kim, Carl V L Olson, Kyle Ellefsen, Jennifer M Bates, Sunil P Gandhi, Dritan Agalliu
Lymphocytes cross vascular boundaries via either disrupted tight junctions (TJs) or caveolae to induce tissue inflammation. In the CNS, Th17 lymphocytes cross the blood-brain barrier (BBB) before Th1 cells; yet this differential crossing is poorly understood. We have used intravital two-photon imaging of the spinal cord in wild-type and caveolae-deficient mice with fluorescently labeled endothelial tight junctions to determine how tight junction remodeling and caveolae regulate CNS entry of lymphocytes during the experimental autoimmune encephalomyelitis (EAE) model for multiple sclerosis...
November 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28782880/adaptive-changes-of-telocytes-in-the-urinary-bladder-of-patients-affected-by-neurogenic-detrusor-overactivity
#6
Chiara Traini, Maria-Simonetta Fausssone-Pellegrini, Daniele Guasti, Giulio Del Popolo, Jacopo Frizzi, Sergio Serni, Maria-Giuliana Vannucchi
Urinary bladder activity involves central and autonomic nervous systems and bladder wall. Studies on the pathogenesis of voiding disorders such as the neurogenic detrusor overactivity (NDO) due to suprasacral spinal cord lesions have emphasized the importance of an abnormal handling of the afferent signals from urothelium and lamina propria (LP). In the LP (and detrusor), three types of telocytes (TC) are present and form a 3D-network. TC are stromal cells able to form the scaffold that contains and organizes the connective components, to serve as guide for tissue (re)-modelling, to produce trophic and/or regulatory molecules, to share privileged contacts with the immune cells...
January 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28581510/nanoscale-manipulation-of-membrane-curvature-for-probing-endocytosis-in-live-cells
#7
Wenting Zhao, Lindsey Hanson, Hsin-Ya Lou, Matthew Akamatsu, Praveen D Chowdary, Francesca Santoro, Jessica R Marks, Alexandre Grassart, David G Drubin, Yi Cui, Bianxiao Cui
Clathrin-mediated endocytosis (CME) involves nanoscale bending and inward budding of the plasma membrane, by which cells regulate both the distribution of membrane proteins and the entry of extracellular species. Extensive studies have shown that CME proteins actively modulate the plasma membrane curvature. However, the reciprocal regulation of how the plasma membrane curvature affects the activities of endocytic proteins is much less explored, despite studies suggesting that membrane curvature itself can trigger biochemical reactions...
August 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28570612/caveolin1-protects-against-diet-induced-hepatic-lipid-accumulation-in-mice
#8
Meng Li, Dahua Chen, Haixiu Huang, Jiewei Wang, Xingyong Wan, Chengfu Xu, Chunxiao Li, Han Ma, Chaohui Yu, Youming Li
BACKGROUND AND AIM: Caveolin1 (CAV1) is involved in lipid homeostasis and endocytosis, but little is known about the significance of CAV1 in the pathogenesis and development of nonalcoholic fatty liver disease (NAFLD). This study aimed to determine the role of CAV1 in NAFLD. METHODS: Expression of CAV1 in the in vitro and in vivo models of NAFLD was analyzed. The effects of CAV1 knockdown or overexpression on free fatty acid (FFA)-induced lipid accumulation in L02 cells and AML12 cells were determined...
2017: PloS One
https://www.readbyqxmd.com/read/28542134/phosphorylated-cav1-activates-autophagy-through-an-interaction-with-becn1-under-oxidative-stress
#9
Jihoon Nah, Seung-Min Yoo, Sunmin Jung, Eun Il Jeong, Moonju Park, Bong-Kiun Kaang, Yong-Keun Jung
CAV1/Caveolin1, an integral membrane protein, is involved in caveolae function and cellular signaling pathways. Here, we report that CAV1 is a positive regulator of autophagy under oxidative stress and cerebral ischemic injury. Treatment with hydrogen peroxide enhanced autophagy flux and caused the localization of BECN1 to the mitochondria, whereas these changes were impaired in the absence of CAV1. Among many autophagy signals, only LC3 foci formation in response to hydrogen peroxide was abolished by CAV1 deficiency...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28258156/maternal-metabolic-stress-may-affect-oviduct-gatekeeper-function
#10
L Jordaens, V Van Hoeck, V Maillo, A Gutierrez-Adan, W F A Marei, B Vlaeminck, S Thys, R G Sturmey, P E J Bols, J L M R Leroy
We hypothesized that elevated non-esterified fatty acids (NEFA) modify in vitro bovine oviduct epithelial cell (BOEC) metabolism and barrier function. Hereto, BOECs were studied in a polarized system with 24-h treatments at Day 9: (1) control (0 µM NEFA + 0% EtOH), (2) solvent control (0 µM NEFA + 0.45% EtOH), (3) basal NEFA (720 µM NEFA + 0.45% EtOH in the basal compartment) and (4) apical NEFA (720 µM NEFA + 0.45% EtOH in the apical compartment). FITC-albumin was used for monolayer permeability assessment and related to transepithelial electric resistance (TER)...
June 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28247940/plasma-membrane-calcium-atpase-4-pmca4-co-ordinates-calcium-and-nitric-oxide-signaling-in-regulating-murine-sperm-functional-activity
#11
Kristine E Olli, Kun Li, Deni S Galileo, Patricia A Martin-DeLeon
Reduced sperm motility (asthenospermia) and resulting infertility arise from deletion of the Plasma Membrane Ca2+ -ATPase 4 (Pmca4) gene which encodes the highly conserved Ca2+ efflux pump, PMCA4. This is the major Ca2+ clearance protein in murine sperm. Since the mechanism underlying asthenospermia in PMCA4's absence or reduced activity is unknown, we investigated if sperm PMCA4 negatively regulates nitric oxide synthases (NOSs) and when absent NO, peroxynitrite, and oxidative stress levels are increased. Using co-immunoprecipitation (Co-IP) and Fluorescence Resonance Energy Transfer (FRET), we show an association of PMCA4 with the NOSs in elevated cytosolic [Ca2+ ] in capacitated and Ca2+ ionophore-treated sperm and with neuronal (nNOS) at basal [Ca2+ ] (ucapacitated sperm)...
January 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28181559/sirtuin1-protects-endothelial-caveolin-1-expression-and-preserves-endothelial-function-via-suppressing-mir-204-and-endoplasmic-reticulum-stress
#12
M Kassan, A Vikram, Y R Kim, Q Li, A Kassan, H H Patel, S Kumar, M Gabani, J Liu, J S Jacobs, K Irani
Sirtuin1 (Sirt1) is a class III histone deacetylase that regulates a variety of physiological processes, including endothelial function. Caveolin1 (Cav1) is also an important determinant of endothelial function. We asked if Sirt1 governs endothelial Cav1 and endothelial function by regulating miR-204 expression and endoplasmic reticulum (ER) stress. Knockdown of Sirt1 in endothelial cells, and in vivo deletion of endothelial Sirt1, induced endothelial ER stress and miR-204 expression, reduced Cav1, and impaired endothelium-dependent vasorelaxation...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28126510/caveolin1-protein-arginine-methyltransferase1-sirtuin1-axis-as-a-potential-target-against-endothelial-dysfunction
#13
REVIEW
Soniya Charles, Vijay Raj, Jesu Arokiaraj, Kanchana Mala
Endothelial dysfunction (ED), an established response to cardiovascular risk factors, is characterized by increased levels of soluble molecules secreted by endothelial cells (EC). Evidence suggest that ED is an independent predictor of cardiac events and that it is associated with a deficiency in production or bioavailability of nitric oxide (NO) and/or an imbalance in the relative contribution of endothelium-derived relaxing and contracting factors. ED can be reversed by treating cardiovascular risk factors, hence, beyond ambiguity, ED contributes to initiation and progression of atherosclerotic disease...
May 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27940194/endocytosis-of-cerium-oxide-nanoparticles-and-modulation-of-reactive-oxygen-species-in-human-ovarian-and-colon-cancer-cells
#14
James A Vassie, John M Whitelock, Megan S Lord
Cerium oxide nanoparticles (nanoceria) are widely reported to be cytocompatible and modulate intracellular reactive oxygen species (ROS) in a range of different cell types. In this study, nanoceria (d=7 and 94nm) synthesised by flame spray pyrolysis did not affect the proliferation of SKOV3 human ovarian and WiDr human colon cancer cell lines over a 72h treatment period. The cellular accumulation of nanoceria was uniform and increased up to 24h post-treatment before decreasing. The uptake of nanoceria in both cell lines was energy-dependent and was found to occur via non-specific pathways as well as clathrin-coated vesicles and caveolae...
March 1, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/27924566/cell-based-assays-to-study-erk-pathway-caveolin1-interactions
#15
Raffaele Strippoli, Asier Echarri, Miguel Angel Del Pozo
Caveolin1, the main component of caveolae, plays a major role in regulating cell motility, gene expression, and cytoskeleton remodeling downstream of many membrane receptors. Here, we summarize different techniques set up to study changes in cell morphology and cell motility regulated by ERK/caveolin1 interactions during induction of epithelial mesenchymal transition (EMT) in mesothelial cells (MCs).
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27466374/p-glycoprotein-traffics-from-the-nucleus-to-the-plasma-membrane-in-rat-brain-endothelium-during-inflammatory-pain
#16
Margaret E Tome, Joseph M Herndon, Charles P Schaefer, Leigh M Jacobs, Yifeng Zhang, Chelsea K Jarvis, Thomas P Davis
P-glycoprotein (PgP), a drug efflux pump in blood-brain barrier endothelial cells, is a major clinical obstacle for effective central nervous system drug delivery. Identifying PgP regulatory pathways that can be exploited clinically is critical for improving central nervous system drug delivery. We previously found that PgP activity increases in rat brain microvessels concomitant with decreased central nervous system drug delivery in response to acute peripheral inflammatory pain. In the current study, we tested the hypothesis that PgP traffics to the luminal plasma membrane of the microvessel endothelial cells from intracellular stores during peripheral inflammatory pain...
November 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27022017/do-src-kinase-and-caveolin-interact-directly-with-na-k-atpase
#17
Eliyahu Yosef, Adriana Katz, Yoav Peleg, Tevie Mehlman, Steven J D Karlish
Much evidence points to a role of Na,K-ATPase in ouabain-dependent signal transduction. Based on experiments with different cell lines and native tissue membranes, a current hypothesis postulates direct interactions between the Na,K-ATPase and Src kinase (non-receptor tyrosine kinase). Na,K-ATPase is proposed to bind Src kinase and inhibit its activity, whereas ouabain, the specific Na,K-ATPase inhibitor, binds and stabilizes the E2 conformation, thus exposing the Src kinase domain and its active site Tyr-418 for activation...
May 27, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/26662566/evaluation-of-hepatic-vascular-endothelial-injury-during-liver-storage-by-molecular-detection-and-targeted-contrast-enhanced-ultrasound-imaging
#18
Fang Xie, Shu-Hua Zhang, Jia Cheng, Hong-Wei Wang, Xiang Fei, Zi-Yu Jiao, Jie Tang, Yu-Kun Luo
We hypothesized that lack of the high-energy phosphates during liver storage may potentially cause persistent injury to the vascular endothelium. Biopsies were obtained from livers obtained from beating heart human donors, stored either in the standard storage solution, that is, University of Wisconsin solution (UWS) or Celsior, and examined for various markers related to progressive endothelial injury. The expression of P2Y1 receptor, the major signal transduction machinery for adenosine triphosphate/adenosine diphosphate, decreased in hepatic vascular endothelial cells over time...
January 2016: IUBMB Life
https://www.readbyqxmd.com/read/26176221/a-frame-shift-mutation-in-cav1-is-associated-with-a-severe-neonatal-progeroid-and-lipodystrophy-syndrome
#19
Isabelle Schrauwen, Szabolcs Szelinger, Ashley L Siniard, Ahmet Kurdoglu, Jason J Corneveaux, Ivana Malenica, Ryan Richholt, Guy Van Camp, Matt De Both, Shanker Swaminathan, Mari Turk, Keri Ramsey, David W Craig, Vinodh Narayanan, Matthew J Huentelman
A 3-year-old female patient presenting with an unknown syndrome of a neonatal progeroid appearance, lipodystrophy, pulmonary hypertension, cutis marmorata, feeding disorder and failure to thrive was investigated by whole-genome sequencing. This revealed a de novo, heterozygous, frame-shift mutation in the Caveolin1 gene (CAV1) (p.Phe160X). Mutations in CAV1, encoding the main component of the caveolae in plasma membranes, cause Berardinelli-Seip congenital lipodystrophy type 3 (BSCL). Although BSCL is recessive, heterozygous carriers either show a reduced phenotype of partial lipodystrophy, pulmonary hypertension, or no phenotype...
2015: PloS One
https://www.readbyqxmd.com/read/26055893/selectivity-of-commonly-used-inhibitors-of-clathrin-mediated-and-caveolae-dependent-endocytosis-of-g-protein-coupled-receptors
#20
Shuohan Guo, Xiaohan Zhang, Mei Zheng, Xiaowei Zhang, Chengchun Min, Zengtao Wang, Seung Hoon Cheon, Min-Ho Oak, Seung-Yeol Nah, Kyeong-Man Kim
Among the multiple G protein-coupled receptor (GPCR) endocytic pathways, clathrin-mediated endocytosis (CME) and caveolar endocytosis are more extensively characterized than other endocytic pathways. A number of endocytic inhibitors have been used to block CME; however, systemic studies to determine the selectivity of these inhibitors are needed. Clathrin heavy chain or caveolin1-knockdown cells have been employed to determine the specificity of various chemical and molecular biological tools for CME and caveolar endocytosis...
October 2015: Biochimica et Biophysica Acta
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