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https://www.readbyqxmd.com/read/29221162/caveolin-1-mediated-stat3-activation-determines-electrotaxis-of-human-lung-cancer-cells
#1
Li Li, Kejun Zhang, Conghua Lu, Qin Sun, Sanjun Zhao, Lin Jiao, Rui Han, Caiyu Lin, Jianxin Jiang, Min Zhao, Yong He
Migration of cancer cells leads to the invasion of distant organs by primary tumors. Further, endogenous electric fields (EFs) in the tumor microenvironment direct the migration of lung cancer cells by a process referred to as electrotaxis - although the precise mechanism remains unclear. Caveolin-1 (Cav-1) is a multifunctional scaffolding protein that is associated with directional cell migration and lung cancer invasion; however, its precise role in lung cancer electrotaxis is unknown. In the present study, we first detected outward electric currents on the tumor body surface in lung cancer xenografts using a highly-sensitive vibrating probe...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29211809/down-regulation-of-the-klf5-c-myc-interaction-due-to-klf5-phosphorylation-mediates-resveratrol-repressing-the-caveolin-1-transcription-through-the-pi3k-pkd1-akt-pathway
#2
Hui Yang, Qiuxia Chen, Fangyun Sun, Nana Zhao, Lirong Wen, Lin Li, Gai Ran
Resveratrol (RSV), a natural polyphenol, has been reported to produce effect on genes transcription in lipid metabolism. In this study, we aim to explore the novel mechanisms of RSV on the regulation of caveolin-1 (Cav-1) transcription. Via body weight, blood glucose, serum lipid, and liver pathology detection, we found that RSV decreased body weight, blood glucose and lipid accumulation in rats fed high-fat diet. Based on co-immunoprecipitation (Co-IP) and western blotting assay, we found that RSV up-regulated klf5 phosphorylation and decreased the interaction of klf5 with c-Myc, which were accompanied by down-regulation of Cav-1 expression in livers of rats fed with high-fat diet...
2017: PloS One
https://www.readbyqxmd.com/read/29207674/genetic-polymorphisms-in-caveolin-1-associate-with-breast-cancer-risk-in-chinese-han-population
#3
Meng Wang, Tian Tian, Xiaobin Ma, Wenge Zhu, Yan Guo, Zhao Duan, Jiangbo Fan, Shuai Lin, Kang Liu, Yi Zheng, Qianwen Sheng, Zhi-Jun Dai, Huixia Peng
Caveolin-1(CAV-1) was demonstrated to be a tumor suppressor gene and be implicated in the development of breast cancer (BC). Numerous potentially functional polymorphisms in CAV-1 have been identified, but their effects on BC were not clear. This case-control study aims to evaluate the relationship between CAV-1 polymorphisms and BC risk. 560 BC patients and 583 healthy controls were enrolled in the present study, all from Chinese Han population. We detected 3 single nucleotide polymorphisms (rs3807987, rs1997623, and rs7804372) in CAV-1 using the Sequenom MassARRAY method...
October 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/29203526/caveolin-1-regulates-lipid-droplet-metabolism-in-endothelial-cells-via-autocrine-prostacyclin-stimulated-camp-mediated-lipolysis
#4
Andrew Kuo, Monica Y Lee, Kui Yang, Richard W Gross, William C Sessa
Lipid droplets (LD) are dynamic organelles involved in intracellular lipid metabolism in almost all eukaryotic cells and LD associated proteins tightly regulate their dynamics. One LD coat proteins is caveolin-1 (Cav-1), an essential component for caveolae assembly in highly differentiated cells including adipocytes, smooth muscle cells and endothelial cells (EC). However, the role of Cav-1 in LD dynamics is unclear. Here, we report that EC lacking Cav-1 exhibit impaired LD formation. The decreased LD formation was due to due to enhanced  lipolysis, and not caused by reduced triglyceride synthesis or fatty acid uptake...
December 4, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29193480/rhabdomyolysis-and-fluctuating-asymptomatic-hyperckemia-associated-with-cacna1s-variant
#5
Charenya Anandan, Mark A Cipriani, Ruple S Laughlin, Zhiyv Niu, Margherita Milone
BACKGROUND AND PURPOSE: CACNA1S encodes Cav 1.1, a voltage sensor for muscle excitation-contraction coupling, which activates the ryanodine receptor 1 (RYR1) leading to calcium release from the sarcoplasmic reticulum. CACNA1S mutations cause hypokalemic periodic paralysis, malignant hyperthermia and congenital myopathy. RYR1 mutations result in congenital myopathy, malignant hyperthermia and rhabdomyolysis. METHODS: To describe a novel phenotype associated with a CACNA1S variant at a site previously linked to hypokalemic periodic paralysis...
November 29, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29191295/changes-in-outcomes-of-cardiac-allograft%C3%A2-vasculopathy-over-30-years-following-heart-transplantation
#6
Maxime Tremblay-Gravel, Normand Racine, Simon de Denus, Anique Ducharme, Guy B Pelletier, Geneviève Giraldeau, Mark Liszkowski, Marie-Claude Parent, Michel Carrier, Annik Fortier, Michel White
OBJECTIVES: This study investigated temporal changes in the demographics and the prognosis of cardiac allograft vasculopathy (CAV) over 30 years following heart transplantation (HTx). BACKGROUND: Effects of the changing HTx demographics on CAV outcomes, based on International Society for Heart and Lung Transplantation (ISHLT) classification of CAV, have been incompletely investigated. METHODS: Patients who underwent HTx at the Montreal Heart Institute were classified according to the severity of CAV (CAV 0 is no presence of CAV; CAV 1 is mild, CAV 2 to 3 is moderate to severe) and era of HTx (early: 1983 to 1998; recent: 1999 to 2011)...
December 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/29181124/inhibition-of-caveolae-contributes-to-propofol-preconditioning-suppressed-microvesicles-release-and-cell-injury-by-hypoxia-reoxygenation
#7
Fan Deng, Shuang Wang, Shuyun Cai, Zhe Hu, Riping Xu, Jingjing Wang, Du Feng, Liangqing Zhang
Endothelial microvesicles (EMVs), released after endothelial cell (EC) apoptosis or activation, may carry many adverse signals and propagate injury by intercellular transmission. Caveolae are 50-100 nm cell surface plasma membrane invaginations involved in many pathophysiological processes. Recent evidence has indicated EMVs and caveolae may have functional effects in cells undergoing H/R injury. Propofol, a widely used anaesthetic, confers antioxidative stress capability in the same process. But the connection between EMVs, H/R, and caveolae remains largely unclear...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29174139/altered-tgf-%C3%AE-endocytic-trafficking-contributes-to-the-increased-signaling-in-marfan-syndrome
#8
Anna-Maria Siegert, Carla Serra-Peinado, Enric Gutiérrez-Martínez, Fernando Rodríguez-Pascual, Isabel Fabregat, Gustavo Egea
The main cardiovascular alteration in Marfan syndrome (MFS) is the formation of aortic aneurysms in which augmented TGF-β signaling is reported. However, the primary role of TGF-β signaling as a molecular link between the genetic mutation of fibrillin-1 and disease onset is controversial. The compartmentalization of TGF-β endocytic trafficking has been shown to determine a signaling response in which clathrin-dependent internalization leads to TGF-β signal propagation, and caveolin-1 (CAV-1) associated internalization leads to signal abrogation...
November 23, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29169152/knockdown-of-caveolin-1-sensitizes-human-basal-like-triple-negative-breast-cancer-cells-to-radiation
#9
Man Zou, Yanhui Li, Shu Xia, Qian Chu, Xiaoguang Xiao, Hong Qiu, Yu Chen, Zu'an Zheng, Fei Liu, Liang Zhuang, Shiying Yu
BACKGROUND/AIMS: Triple-negative breast cancer (TNBC) is a high-risk breast cancer phenotype without specific targeted therapy options and is significantly associated with increased local recurrence in patients treated with radiotherapy. CAVEOLIN-1 (CAV-1)-mediated epidermal growth factor receptor (EGFR) nuclear translocation following irradiation promotes DNA repair and thus induces radiation resistance. In this study, we aimed to determine whether knockdown of CAV-1 enhances the radiosensitivity of basal-like TNBC cell lines and to explore the possible mechanisms...
November 23, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29163047/biphasic-regulation-of-caveolin-1-gene-expression-by-fluoxetine-in-astrocytes-opposite-effects-of-pi3k-akt-and-mapk-erk-signaling-pathways-on-c-fos
#10
Baoman Li, Shu Jia, Tingting Yue, Li Yang, Chen Huang, Alexej Verkhratsky, Liang Peng
Previously, we reported that fluoxetine acts on 5-HT2B receptor and induces epidermal growth factor receptor (EGFR) transactivation in astrocytes. Recently, we have found that chronic treatment with fluoxetine regulates Caveolin-1 (Cav-1)/PTEN/PI3K/AKT/glycogen synthase kinase 3β (GSK-3β) signaling pathway and glycogen content in primary cultures of astrocytes with bi-phasic concentration dependence. At low concentrations fluoxetine down-regulates Cav-1 gene expression, decreases membrane content of PTEN, increases PI3K activity and increases phosphorylation of GSK-3β and increases its activity; at high concentrations fluoxetine acts on PTEN/PI3K/AKT/GSK-3β in an inverse fashion...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29154860/the-role-of-caveolin-1-in-morphine-induced-structural-plasticity-in-primary-cultured-mouse-cerebral-cortical-neurons
#11
Weihua Cui, Yi Ren, Shanshan Wang, Min Zeng, Song Han, Junfa Li, Ruquan Han
Long-term repeated application of morphine induces plasticity changes in sensitive neurons, which represents the neurobiological basis of morphine addiction. Caveolin-1 (Cav-1) is an important scaffolding protein that plays a key role in the regulation of neurostructural plasticity. However, in-depth studies focused on the role of Cav-1 in morphine-induced changes in neurostructural plasticity are lacking. The present study explored the effects of Cav-1 on the expression levels of 2 markers of neurite outgrowth, growth association protein 43 (GAP-43) and microtubule-associated protein 2 (MAP-2), during the process of morphine-induced changes in the structural plasticity...
November 14, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29141593/bidirectional-alteration-of-cav-1-expression-is-associated-with-mitogenic-conversion-of-its-function-in-gastric-tumor-progression
#12
Byung-Kyu Ryu, Min-Goo Lee, Nam-Hoon Kim, Kil Yeon Lee, Shin-Ju Oh, Jung-Rock Moon, Hyo Jong Kim, Sung-Gil Chi
BACKGROUND: Expression of caveolin-1 (Cav-1) is frequently altered in many human cancers and both tumor suppression and promotion functions of Cav-1 have been suggested based on its expression status. However, it remains unanswered how Cav-1 provokes opposite effects in different cancers or different phases of tumor progression. METHODS: To explore the implication of Cav-1 alteration in gastric tumorigenesis, the expression and mutational status of Cav-1 and its effects on tumor cell growth were characterized...
November 15, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29137977/downregulation-of-caveolin-1-increased-egfr-tkis-sensitivity-in-lung-adenocarcinoma-cell-line-with-egfr-mutation
#13
Yujie Cui, Tienian Zhu, Xuejing Song, Jiankun Liu, Shuang Liu, Ruijing Zhao
Although epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs), including gefitinib and erlotinib, have shown notable effects in lung adenocarcinoma patients harboring EGFR mutations, there are significant differences between individual patients in the degree of benefits provided by EGFR-TKIs. Some evidence supports a role for caveolin-1 (Cav-1) in modulating drug sensitivity. This study aimed to investigate whether Cav-1 plays an important role in sensitivity to EGFR-TKIs in lung adenocarcinoma cells...
November 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29132227/oxidative-stress-in-hiv-infection-and-alcohol-use-role-of-redox-signals-in-modulation-of-lipid-rafts-and-abc-transporters
#14
Samikkannu Thangavel, Carmen T Mulet, Venkata S R Atluri, Marisela Agudelo, Rhonda Rosenberg, Jessy G Devieux, Madhavan P N Nair
AIMS: HIV infection induces oxidative stress and alcohol use accelerates disease progression subsequently causing immune dysfunction. However, HIV and alcohol impact on lipid rafts-mediated immune dysfunction remains unknown. In this study, we investigate the modulation by which oxidative stress induces reactive oxygen species (ROS) affecting redox expression, lipid rafts caveiloin-1, ATP-binding cassette (ABC)-transporters, and transcriptional SREBP gene and protein modification and how these mechanisms are associated with arachidonic acid (AA) metabolites in HIV positive alcohol users, and how they escalate immune dysfunction...
November 13, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29123923/root-securing-and-brain-fortifying-liquid-upregulates-caveolin-1-in-cell-model-with-alzheimer-s-disease-through-inhibiting-tau-phosphorylation
#15
Depei Yuan, Chuhua Zeng, Qianfeng Chen, Fengjie Wang, Lin Yuan, Yaoqian Zhu, Ziyang Shu, Ning Chen
In order to explore the effect of root-securing and brain-fortifying Liquid- (RSBFL-) mediated caveolin-1 (CAV-1) on phosphorylation of Tau protein and to uncover underlying mechanisms of RSBFL for the prevention and treatment of Alzheimer's disease (AD), hippocampal neurons isolated from neonatal SD rats and cultured in DMEM-F12 medium were induced by exogenous Aβ1-42 to establish a cell model with AD. Meanwhile, pEGFP-C1-CAV1 and CAV1-shRNA plasmids were transfected into hippocampal neurons for CAV-1 overexpression and silence, respectively...
2017: Neurology Research International
https://www.readbyqxmd.com/read/29116659/type-1-astrocyte-like-stem-cells-harboring-cacna1d-gene-deletion-exhibit-reduced-proliferation-and-decreased-neuronal-fate-choice
#16
Bianca Völkening, Kai Schönig, Golo Kronenberg, Dusan Bartsch, Tillmann Weber
In the central nervous system, CaV 1.2 and CaV 1. 3 constitute the main L-type voltage-gated calcium channels (LTCCs) coupling membrane depolarization to gene transcription. We have previously demonstrated that inducible disruption of Cav1.2 in type-1 astrocyte-like stem cells of the adult dentate gyrus (DG) impairs hippocampal neurogenesis in a cell-autonomous fashion. To address the role of Cav1.3 channels (encoded by the Cacna1d gene), we here generated Tg(GLAST-CreERT2) /Cacna1d(fl/fl) /RCE:loxP mice which facilitate inducible deletion of Cacna1d in tandem with induction of EGFP expression in type-1 cells, allowing tracking of recombined cells and their descendants...
November 8, 2017: Hippocampus
https://www.readbyqxmd.com/read/29113797/caveolin-1-a-binding-protein-of-cd26-is-essential-for-the-anti-inflammatory-effects-of-dipeptidyl-peptidase-4-inhibitors-on-human-and-mouse-macrophages
#17
Munenori Hiromura, Kyoko Nohtomi, Yusaku Mori, Hideo Kataoka, Marika Sugano, Kei Ohnuma, Hirotaka Kuwata, Tsutomu Hirano
We previously reported that inhibition of dipeptidyl peptidase (DPP)-4, the catalytic site of CD26, prevents atherosclerosis in animal models through suppression of inflammation; however, the underlying molecular mechanisms have not been fully elucidated. Caveolin-1 (Cav-1), a major structural protein of caveolae located on the surface of the cellular membrane, has been reported to modulate inflammatory responses by binding to CD26 in T cells. In this study, we investigated the role of Cav-1 in the suppression of inflammation mediated by the DPP-4 inhibitor, teneligliptin, using mouse and human macrophages...
November 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29095792/important-role-of-endothelial-caveolin-1-in-the-protective-role-of-edh-against-no-mediated-nitrative-stress-in-microcirculation-in-mice
#18
Hiroki Saito, Shigeo Godo, Saori Sato, Akiyo Ito, Yosuke Ikumi, Shuhei Tanaka, Tomoaki Ida, Shigemoto Fujii, Takaaki Akaike, Hiroaki Shimokawa
AIMS: Nitric oxide (NO) and endothelium-dependent hyperpolarization (EDH) play important roles in maintaining cardiovascular homeostasis. We have previously demonstrated that endothelial NO synthase (eNOS) plays diverse roles depending on vessel size, as a NO generating system in conduit arteries and an EDH-mediated system in resistance arteries, for which caveolin-1(Cav-1) is involved. However, the physiological role of endothelial Cav-1 in microvessels remains to be elucidated. METHODS AND RESULTS: We newly generated endothelium-specific Cav-1-knockout (eCav-1-KO) mice...
October 27, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29080835/cav-1-promote-lung-cancer-cell-proliferation-and-invasion-through-lncrna-hotair
#19
Wei Liu, Nan-Chang Yin, Hao Liu, Ke-Jun Nan
OBJECTIVES: Lung cancer is one of the most common malignant tumors worldwide, and its morbidity and mortality rates continue to rise. The role of lncRNAs in lung cancer has become an emerging area of research. MATERIALS AND METHODS: The expression of CAV-1 and HOTAIR was determined in lung cancer tissues and cell lines by western blot and RT-qPCR. Cell proliferation, migration and invasion were analysed in lung cell following knockdown or overexpression of CAV-1 or HOTAIR by transfection with small interfering RNA (siRNA) or plasmid...
October 25, 2017: Gene
https://www.readbyqxmd.com/read/29078207/hsp90-downregulation-influences-the-heat-shock-response-innate-immune-response-and-onset-of-oocyte-development-in-nematodes
#20
Julia Eckl, Siyuan Sima, Katrin Marcus, Claudia Lindemann, Klaus Richter
Hsp90 is a molecular chaperone involved in the regulation and maturation of kinases and transcription factors. In Caenorhabditis elegans, it contributes to the development of fertility, maintenance of muscle structure, the regulation of heat-shock response and dauer state. To understand the consequences of Hsp90-depletion, we studied Hsp90 RNAi-treated nematodes by DNA microarrays and mass spectrometry. We find that upon development of phenotypes the levels of chaperones and Hsp90 cofactors are increased, while specific proteins related to the innate immune response are depleted...
2017: PloS One
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