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https://www.readbyqxmd.com/read/27904950/age-dependent-alpha-synuclein-accumulation-is-correlated-with-elevation-of-mitochondrial-trpc3-in-the-brains-of-monkeys-and-mice
#1
Min Chen, Jia Liu, Yongquan Lu, Chunli Duan, Lingling Lu, Ge Gao, Piu Chan, Shun Yu, Hui Yang
Aberrant α-synuclein (α-syn) accumulation has been shown to impair mitochondrial function by reducing mitochondrial membrane potential (MMP). However, the underlying mechanisms remain elusive. Transient receptor potential canonical (TRPC) channels are a diverse group of non-selective Ca(2+) channels, among which TRPC3 is the only one that is localized in mitochondria and plays a role in maintaining the normal MMP. This raises a possibility that altered TRPC3 expression may play a role in the mitochondrial dysfunction induced by α-syn accumulation...
November 30, 2016: Journal of Neural Transmission
https://www.readbyqxmd.com/read/27895148/trpc5-regulates-differentiation-through-the-ca2-wnt5a-signal-pathway-in-colorectal-cancer
#2
Zhen Chen, Chunlei Tang, Yaodan Zhu, Mingxu Xie, Dongxu He, Qiongxi Pan, Peng Zhang, Dong Hua, Teng Wang, Linfang Jin, Xiaowei Qi, Yifei Zhu, Xiaoqiang Yao, Jian Jin, Xin Ma
Transient receptor potential channel 5 (TrpC5) is member of the TrpC subgroup, and it forms a receptor-activated non-selective Ca(2+) channel. The architecture of the TrpC5 channel is poorly understood. Here, we report that TrpC5 is a key factor in regulating differentiation in colorectal cancer. Through a study of specimens from a large cohort of patients with colorectal cancer, we found that TrpC5 was highly expressed and its cellular level correlated with tumor grade. We further showed that up-regulated TrpC5 caused a robust [Ca(2+)]i rise, increased Wnt5a expression, and the nuclear translocation of β-catenin, leading to a reduction of cancer differentiation and an increase of cancer cell stemness...
November 28, 2016: Clinical Science (1979-)
https://www.readbyqxmd.com/read/27875791/localization-and-expression-patterns-of-trp-channels-in-submandibular-gland-development
#3
Motoya Fujiseki, Masahito Yamamoto, Sobhan Ubaidus, Takashi Shinomiya, Shinichi Abe, Masakazu Tazaki, Hitoshi Yamamoto
OBJECTIVE: Expression of Transient receptor potential (TRP) channels: TRP canonical (TRPC)1, TRP vanilloid (TRPV)3, TRPV4 and TRP melastatin (TRPM)8 in adult rat salivary gland has recently been reported. The authors investigated expression of these TRP channels in the submandibular gland during early developmental stage in which the cell constitution is different, and discussed the function of TRP in the submandibular gland in early development. DESIGN: Using rat submandibular gland at embryonic days (E)18 and E20 and postnatal days (PN)0 and PN5 and PN28, expression of TRPV3, TRPV4, TRPC1 and TRPM8 was investigated using real-time polymerase chain reaction (RT-PCR) and immunohistochemistry...
November 11, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/27867361/calcium-sensing-receptor-regulates-cytosolic-ca-2-and-plays-a-major-role-in-the-development-of-pulmonary-hypertension
#4
REVIEW
Kimberly A Smith, Ramon J Ayon, Haiyang Tang, Ayako Makino, Jason X-J Yuan
Pulmonary arterial hypertension (PAH) is a progressive disease characterized by elevated pulmonary vascular resistance (PVR) leading to right heart failure and premature death. The increased PVR results in part from pulmonary vascular remodeling and sustained pulmonary vasoconstriction. Excessive pulmonary vascular remodeling stems from increased pulmonary arterial smooth muscle cell (PASMC) proliferation and decreased PASMC apoptosis. A rise in cytosolic free Ca(2+) concentration ([Ca(2+)]cyt) in PASMC is a major trigger for pulmonary vasoconstriction and a key stimulus for PASMC proliferation and migration, both contributing to the development of pulmonary vascular remodeling...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27861908/differences-in-trpc3-and-trpc6-channels-assembly-in-mesenteric-vascular-smooth-muscle-cells-in-essential-hypertension
#5
Inés Álvarez-Miguel, Pilar Cidad, M Teresa Pérez-García, José Ramón López-López
Increased vascular tone in essential hypertension involves a sustained rise in total peripheral resistance. A model has been proposed in which the combination of membrane depolarization and higher L-type Ca(2+) channel activity generates augmented Ca(2+) influx into vascular smooth muscle cells (VSMCs), contraction and vasoconstriction. The search for culprit ion channels responsible of membrane depolarization has provided several candidates, including members of the TRPC family. TRPC3 and TRPC6 are DAG-activated, non-selective cationic channels contributing to stretch- or agonist-induced depolarization...
November 12, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27818125/aflatoxin-b1-disrupts-transient-receptor-potential-channel-activity-and-increases-cox-2-expression-in-jeg-3-placental-cells
#6
Yun Zhu, Yan Qin Tan, Lai K Leung
Aflatoxins are fungal metabolites which pose a major threat to food safety. Although these mycotoxins are established hepatocarcinogens, their effect on the reproductive organ is unknown. Transient Receptor Potential Channels (TRPs) are ubiquitously expressed in human tissues, including the placenta. These channels are associated with various functions in the placenta. The fetus and the placenta are especially sensitive to xenobiotic assault; therefore, exposure to the aflatoxins during gestation might lead to the undesirable outcome...
November 3, 2016: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27751953/photobiomodulation-of-human-adipose-derived-stem-cells-using-810nm-and-980nm-lasers-operates-via-different-mechanisms-of-action
#7
Yuguang Wang, Ying-Ying Huang, Yong Wang, Peijun Lyu, Michael R Hamblin
Photobiomodulation (PBM) using red or near-infrared (NIR) light has been used to stimulate the proliferation and differentiation of adipose-derived stem cells. The use of NIR wavelengths such as 810nm is reasonably well accepted to stimulate mitochondrial activity and ATP production via absorption of photons by cytochrome c oxidase. However, the mechanism of action of 980nm is less well understood. Here we study the effects of both wavelengths (810nm and 980nm) on adipose-derived stem cells in vitro. Both wavelengths showed a biphasic dose response, but 810nm had a peak dose response at 3J/cm(2) for stimulation of proliferation at 24h, while the peak dose for 980nm was 10-100 times lower at 0...
October 15, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27738307/movement-deficits-and-neuronal-loss-in-basal-ganglia-in-trpc1-deficient-mice
#8
Kaiwu He, Fei Qi, Chunni Guo, Shuqin Zhan, Hua Xu, Jianjun Liu, Xifei Yang
Transient receptor potential cation (TRPC) channel proteins are abundantly expressed in brain. However, the functions of these TRPC proteins such as TRPC1 are largely unclear. In this study, we reported that TRPC1 deficiency caused movement disorder as measured by swimming test, modified open field test and sunflower seeds eating test. Immunofluorescent staining showed significant loss of both NeuN-positive cells and tyrosine hydroxylase (TH) -positive cells in the caudate putamen (CPu), the external globus pallidus (GPe), and the substantia nigra pars reticulata (SNr) in 5-month-old TRPC1 knockout mice (TRPC1-/-) compared to the wild type (WT) mice...
October 11, 2016: Oncotarget
https://www.readbyqxmd.com/read/27617218/identification-of-trpcs-genetic-variants-that-modify-risk-for-lung-cancer-based-on-the-pathway-and-two-stage-study
#9
Zili Zhang, Jian Wang, Jianxing He, Xiansheng Zeng, Xindong Chen, Mingmei Xiong, Qipeng Zhou, Meihua Guo, Defu Li, Wenju Lu
OBJECTIVE: Store operated calcium channels (SOCCs) and Receptor-operated calcium channels (ROCCs) are important pathways participating in regulation of intracellular Ca(2 +) concentration in various cell types. The purpose of our study is to determine whether genetic variations in key components of SOCCs and ROCCs are associated with lung cancer risk. METHODS: We identified 236 tagSNPs in 9 key genes related to SOCCs and ROCCs (TRPC1, TRPC3, TRPC4, TRPC6, TRPC7, ORAI1, ORAI2, STIM1, and STIM2) and evaluated their association with lung cancer risk in a two-stage case-control study with a total of 2433 lung cancer cases and 2433 cancer-free controls using Illumina high throughput genotyping platform...
September 2016: Meta Gene
https://www.readbyqxmd.com/read/27614169/endoglin-selectively-modulates-transient-receptor-potential-channel-expression-in-left-and-right-heart-failure
#10
Kevin J Morine, Vikram Paruchuri, Xiaoying Qiao, Mark Aronovitz, Gordon S Huggins, David DeNofrio, Michael S Kiernan, Richard H Karas, Navin K Kapur
INTRODUCTION: Transient receptor potential (TRP) channels are broadly expressed cation channels that mediate diverse physiological stimuli and include canonical (TRPC), melastatin (TRPM), and vanilloid (TRPV) subtypes. Recent studies have implicated a role for TRPC6 channels as an important component of signaling via the cytokine, transforming growth factor beta 1 (TGFβ1) in right (RV) or left ventricular (LV) failure. Endoglin (Eng) is a transmembrane glycoprotein that promotes TRPC6 expression and TGFβ1 activity...
August 21, 2016: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/27534509/brain-derived-neurotrophic-factor-promotes-the-migration-of-olfactory-ensheathing-cells-through-trpc-channels
#11
Ying Wang, Hong-Lin Teng, Yuan Gao, Fan Zhang, Yu-Qiang Ding, Zhi-Hui Huang
Olfactory ensheathing cells (OECs) are a unique type of glial cells with axonal growth-promoting properties in the olfactory system. Organized migration of OECs is essential for neural regeneration and olfactory development. However, the molecular mechanism of OEC migration remains unclear. In the present study, we examined the effects of brain-derived neurotrophic factor (BDNF) on OEC migration. Initially, the "scratch" migration assay, the inverted coverslip and Boyden chamber migration assays showed that BDNF could promote the migration of primary cultured OECs...
August 18, 2016: Glia
https://www.readbyqxmd.com/read/27532878/protective-effects-of-transient-receptor-potential-canonical-channels-on-oxygen-glucose-deprivation-induced-cell-injury-in-neurons-and-pc12-cells
#12
Yan Wang, Yingbo Li, Chen Di, Tu Liu, Qianlin Hou, Shali Wang
Hypoxic-ischemic encephalopathy (HIE) is a serious clinical problem, responsible for many cases of motor impairment, cognitive deficits, and mortality. Transient receptor potential canonical (TRPC) channels are nonselective cation channels that play a role in many disorders, including trauma, pulmonary hypertension, and excitotoxicity. However, the properties and underlying mechanisms of TRPC channels in HIE are still controversial. Extracellular signal-regulated kinase (ERK) and mammalian target of rapamycin (mTOR) are central signaling pathways that transmit signals from extracellular to intracellular agents and mediate prosurvival, proliferation, and motility proteins...
September 28, 2016: Neuroreport
https://www.readbyqxmd.com/read/27522668/resistance-to-pathologic-cardiac-hypertrophy-and-reduced-expression-of-cav1-2-in-trpc3-depleted-mice
#13
Jung Woo Han, Young Ho Lee, Su-In Yoen, Joel Abramowitz, Lutz Birnbaumer, Min Goo Lee, Joo Young Kim
Sustained elevation of intracellular Ca(2+) concentration ([Ca(2+)]i) reprograms cardiovascular cell fate, leading to cellular hypertrophy via Ca(2+)-calmodulin/calcineurin (Cn)/NFAT activation. Accumulating evidence suggests that transient receptor potential canonical (Trpc) channels play important roles in the development of pathologic cardiac hypertrophy. Here, we demonstrated that Trpc3 mediates pathologic cardiac hypertrophy in neurohumoral elevation via direct regulation of CaV1.2 expressions. Elevated PE (phenylephrine) was maintained in mice by continuous infusion using an osmotic pump...
October 2016: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/27506849/saraf-modulates-trpc1-but-not-trpc6-channel-function-in-a-stim1-independent-manner
#14
Letizia Albarrán, José J López, Luis J Gómez, Ginés M Salido, Juan A Rosado
Canonical transient receptor potential-1 (TRPC1) is an almost ubiquitously expressed channel that plays a relevant role in cell function. As other TRPC members, TRPC1 forms receptor-operated cation channels that exhibit both STIM1-dependent and store-independent behaviour. The STIM1 inhibitor SARAF (for store-operated Ca(2+) entry (SOCE)-associated regulatory factor) modulates SOCE by interaction with the STIM1 region responsible for Orai1 activation (SOAR). Furthermore, SARAF modulates Ca(2+) entry through the arachidonate-regulated Ca(2+) (ARC) channels, consisting of Orai1 and Orai3 heteropentamers and plasma membrane-resident STIM1...
October 15, 2016: Biochemical Journal
https://www.readbyqxmd.com/read/27471122/upregulation-of-transient-receptor-potential-canonical-channels-contributes-to-endotoxin-induced-pulmonary-arterial-stenosis
#15
Gui-Lan Chen, Hongni Jiang, Fangdong Zou
BACKGROUND Septic shock is a pathologic condition caused by endotoxin-producing bacteria, and often associated with severe pulmonary hypertension. Inflammation is a major systemic response to endotoxin; however, it is unknown whether endotoxin has a direct impact on pulmonary arteries that contributes to pathogenesis of pulmonary hypertension. MATERIAL AND METHODS Rat pulmonary arteries and primary pulmonary arterial smooth muscle cells (PASMCs) were cultured in vitro and treated with lipopolysaccharide (LPS) and blockers of transient receptor potential canonical (TRPC) channels...
2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27470334/lipopolysaccharide-potentiates-endothelin-1-induced-proliferation-of-pulmonary-arterial-smooth-muscle-cells-by-upregulating-trpc-channels
#16
Hong-Ni Jiang, Bo Zeng, Gui-Lan Chen, Bin Lai, Shao-Hua Lu, Jie-Ming Qu
Lipopolysaccharide (LPS) and endothelin-1 (ET-1) are critical pathogenic factors in sepsis-induced pulmonary hypertension; however it is unknown whether they have a coordinated action in the pathogenesis of this disease. Here we found that although LPS did not change the contractility of rat pulmonary arterial smooth muscle cells (PASMCs) in response to ET-1, it significantly promoted ET-1-induced PASMC proliferation. Measurement of ET-1-evoked Ca(2+) transients in PASMCs showed that LPS dramatically enhanced Ca(2+) influx mediated by transient receptor potential canonical (TRPC) channels...
August 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27464700/expression-of-transient-receptor-potential-channels-in-the-purified-human-pancreatic-%C3%AE-cells
#17
Francesco Marabita, Md Shahidul Islam
OBJECTIVE: Members of the transient receptor potential (TRP) channels are involved in mediating the electrical excitability and stimulus-secretion coupling in the pancreatic β-cells. The expression and the relative abundance of different TRP channels in the human β-cells are unknown. The objective of this study was to examine the expression of the TRP channels and their relative abundance in the human β-cell. METHODS: RNA sequencing data obtained from human islets, fluorescence-activated cell sorting-purified human β-cell and human pancreatic acinar cells were analyzed...
July 25, 2016: Pancreas
https://www.readbyqxmd.com/read/27449657/early-steatohepatitis-in-hyperlipidemic-mice-with-endothelial-specific-gain-of-trpc3-function-precedes-changes-in-aortic-atherosclerosis
#18
Kathryn Smedlund, Prabhatachandra Dube, Guillermo Vazquez
Nonalcoholic fatty liver disease (NAFLD) and its more advanced form nonalcoholic steatohepatitis (NASH) are the most common chronic liver diseases in developed countries. Moreover, NAFLD and NASH are considerable risk factors for atherosclerosis, the most frequent vascular pathology in these and other metabolic diseases. Despite this strong connection, current knowledge of the relationship between NAFLD/NASH and atherosclerosis is scarce. Recently, we studied hyperlipidemic Apoe knockout mice with endothelial-specific gain of transient receptor potential canonical 3 channel function (TgESTRPC3/ApoeKO) and found that these animals had increased burden of advanced aortic atherosclerosis (16 wk on high-fat diet) compared with nontransgenic ApoeKO littermate controls (non-Tg/ApoeKO), whereas early lesions (10 wk on high-fat diet) were not different...
August 1, 2016: Physiological Genomics
https://www.readbyqxmd.com/read/27431463/reprint-of-mechanisms-of-lipid-regulation-and-lipid-gating-in-trpc-channels
#19
REVIEW
Barbora Svobodova, Klaus Groschner
TRPC proteins form cation channels that integrate and relay cellular signals by mechanisms involving lipid recognition and lipid-dependent gating. The lipohilic/amphiphilic molecules that function as cellular activators or modulators of TRPC proteins span a wide range of chemical structures. In this context, cellular redox balance is likely linked to the lipid recognition/gating features of TRPC channels. Both classical ligand-protein interactions as well as indirect and promiscuous sensory mechanisms have been proposed...
August 2016: Cell Calcium
https://www.readbyqxmd.com/read/27430926/-bone-morphogenetic-protein-4-increases-canonical-transient-receptor-potential-protein-expression-by-activating-bone-morphogenetic-protein-receptor-%C3%A2-smad-signaling-pathways-in-pulmonary-arterial-smooth-muscle-cells
#20
X Y Li, P X Ran, J Wang
OBJECTIVE: To observe the effect of bone morphogenetic protein 4 (BMP4) on the Smad signaling pathway in rat distal pulmonary artery smooth muscle cells (PASMCs), and to explore the role of the transient receptor potential ion channel (TRPC) protein 1 and 6(TRPC1, 6) in rat distal PASMCs. METHODS: Distal pulmonary arteries were isolated from adult male Wistar rats(n=6, 280-300 g). The endothelium-denuded pulmonary artery tissue was digested using Collagenase and PASMCs were cultured...
July 2016: Chinese Journal of Tuberculosis and Respiratory Diseases
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