1
|
Radoslavova S, Fels B, Pethö Z, Gruner M, Ruck T, Meuth SG, Folcher A, Prevarskaya N, Schwab A, Ouadid-Ahidouch H. TRPC1 channels regulate the activation of pancreatic stellate cells through ERK1/2 and SMAD2 pathways and perpetuate their pressure-mediated activation. Cell Calcium 2022; 106:102621. [PMID: 35905654 DOI: 10.1016/j.ceca.2022.102621] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 11/02/2022]
Abstract
Pancreatic stellate cell (PSC) activation is a major event occurring during pancreatic ductal adenocarcinoma (PDAC) development. Up to now mechanisms underlying their activation by mechanical cues such as the elevated tissue pressure in PDAC remain poorly understood. Here we investigate the role of one potential mechano-transducer, TRPC1 ion channel, in PSC activation. Using pre-activated human siTRPC1 and murine TRPC1-KO PSCs, we show that TRPC1 promotes αSMA (α-smooth muscle actin) expression, the main activation marker, in cooperation with the phosphorylated SMAD2, under normal and elevated pressure. Functional studies following TRPC1 silencing demonstrate the dual role of TRPC1 in the modulation of PSC proliferation and IL-6 secretion through the activation of ERK1/2 and SMAD2 pathways. Moreover, pressurization changes the mechanical behavior of PSCs by increasing their cellular stiffness and emitted traction forces in a TRPC1-dependent manner. In summary, these results point to a role of TRPC1 channels in sensing and transducing the characteristic mechanical properties of the PDAC microenvironment in PSCs.
Collapse
Affiliation(s)
- Silviya Radoslavova
- Laboratory of Cellular and Molecular Physiology, UR-UPJV 4667, University of Picardie Jules Verne, 80039 Amiens, France; University of Lille, Inserm U1003 - PHYCEL - Cellular Physiology, F-59000 Lille, France
| | - Benedikt Fels
- Institute of Physiology, University Lübeck, Lübeck, Germany; DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany
| | - Zoltan Pethö
- Institute of Physiology II, University Münster, Münster, Germany
| | - Matthias Gruner
- Institute of Physiology II, University Münster, Münster, Germany
| | - Tobias Ruck
- Klinik für Neurologie, Medical Faculty, Universitätsklinikum Düsseldorf, Düsseldorf, Germany
| | - Sven G Meuth
- Klinik für Neurologie, Medical Faculty, Universitätsklinikum Düsseldorf, Düsseldorf, Germany
| | - Antoine Folcher
- University of Lille, Inserm U1003 - PHYCEL - Cellular Physiology, F-59000 Lille, France
| | - Natalia Prevarskaya
- University of Lille, Inserm U1003 - PHYCEL - Cellular Physiology, F-59000 Lille, France.
| | - Albrecht Schwab
- Institute of Physiology II, University Münster, Münster, Germany.
| | - Halima Ouadid-Ahidouch
- Laboratory of Cellular and Molecular Physiology, UR-UPJV 4667, University of Picardie Jules Verne, 80039 Amiens, France.
| |
Collapse
|
2
|
Hu Q, Ahmad AA, Seidel T, Hunter C, Streiff M, Nikolova L, Spitzer KW, Sachse FB. Location and function of transient receptor potential canonical channel 1 in ventricular myocytes. J Mol Cell Cardiol 2020; 139:113-123. [PMID: 31982426 DOI: 10.1016/j.yjmcc.2020.01.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 12/16/2019] [Accepted: 01/21/2020] [Indexed: 11/17/2022]
Abstract
Transient receptor potential canonical 1 (TRPC1) protein is abundantly expressed in cardiomyocytes. While TRPC1 is supposed to be critically involved in cardiac hypertrophy, its physiological role in cardiomyocytes is poorly understood. We investigated the subcellular location of TRPC1 and its contribution to Ca2+ signaling in mammalian ventricular myocytes. Immunolabeling, three-dimensional scanning confocal microscopy and quantitative colocalization analysis revealed an abundant intracellular location of TRPC1 in neonatal rat ventricular myocytes (NRVMs) and adult rabbit ventricular myocytes. TRPC1 was colocalized with intracellular proteins including sarco/endoplasmic reticulum Ca2+ ATPase 2 in the sarcoplasmic reticulum (SR). Colocalization with wheat germ agglutinin, which labels the glycocalyx and thus marks the sarcolemma including the transverse tubular system, was low. Super-resolution and immunoelectron microscopy supported the intracellular location of TRPC1. We investigated Ca2+ signaling in NRVMs after adenoviral TRPC1 overexpression or silencing. In NRVMs bathed in Na+ and Ca2+ free solution, TRPC1 overexpression and silencing was associated with a decreased and increased SR Ca2+ content, respectively. In isolated rabbit cardiomyocytes bathed in Na+ and Ca2+ free solution, we found an increased decay of the cytosolic Ca2+ concentration [Ca2+]i and increased SR Ca2+ content in the presence of the TRPC channel blocker SKF-96365. In a computational model of rabbit ventricular myocytes at physiological pacing rates, Ca2+ leak through SR TRPC channels increased the systolic and diastolic [Ca2+]i with only minor effects on the action potential and SR Ca2+ content. Our studies suggest that TRPC1 channels are localized in the SR, and not present in the sarcolemma of ventricular myocytes. The studies provide evidence for a role of TRPC1 as a contributor to SR Ca2+ leak in cardiomyocytes, which was previously explained by ryanodine receptors only. We propose that the findings will guide us to an understanding of TRPC1 channels as modulators of [Ca2+]i and contractility in cardiomyocytes.
Collapse
Affiliation(s)
- Qinghua Hu
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT 84112, USA; Department of Cardiovascular Surgery, Xiangya Hospital, Central-South University, Changsha, Hunan 410078, China
| | - Azmi A Ahmad
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT 84112, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Thomas Seidel
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT 84112, USA
| | - Chris Hunter
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT 84112, USA
| | - Molly Streiff
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT 84112, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Linda Nikolova
- Core Research Facilities, Health Sciences Center, University of Utah, Salt Lake City, UT 84112, USA
| | - Kenneth W Spitzer
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT 84112, USA
| | - Frank B Sachse
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT 84112, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA.
| |
Collapse
|
3
|
Du T, Rong Y, Feng R, Verkhratsky A, Peng L. Chronic Treatment with Anti-bipolar Drugs Down-Regulates Gene Expression of TRPC1 in Neurones. Front Cell Neurosci 2017; 10:305. [PMID: 28119572 PMCID: PMC5223735 DOI: 10.3389/fncel.2016.00305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 12/22/2016] [Indexed: 11/24/2022] Open
Abstract
In the brain, TRPC1 channels are abundantly expressed in neurones virtually in all regions; these proteins function as receptor-activated ion channels and are implicated in numerous processes, being specifically important for neurogenesis. Primary cultures of mouse cerebellar granule cell, cerebral cortical neurones, and freshly isolated neurones from in vivo brains were used to study effects of chronic treatment with anti-bipolar drugs [carbamazepine (CBZ), lithium salts and valproic acid] on gene expression of TRPC1. Expression of TRPC1 mRNA was identified with reverse transcription-polymerase chain reaction, whereas protein content was determined by Western blotting. Store-operated plasmalemmal Ca2+ entry (SOCE) was measured with fura-2 based microfluorimetry. Chronic treatment with each of the three drugs down-regulated mRNA and protein expression in cultured cerebellar granule cells in a time- and concentration-dependent manner. Similar effect was also observed in cultured cerebral cortical neurones treated with CBZ, lithium salts and valproic acid and in freshly isolated neurones from the brains of CBZ-treated animals. The amplitude of SOCE was substantially decreased in cerebellar granule cells chronically treated with each of the three drugs. Our findings indicate that down-regulation of TRPC1 gene expression and function in neurones may be one of the mechanisms of anti-bipolar drugs action.
Collapse
Affiliation(s)
- Ting Du
- Laboratory of Metabolic Brain Diseases, Institute of Metabolic Disease Research and Drug Development, China Medical University Shenyang, China
| | - Yan Rong
- Laboratory of Metabolic Brain Diseases, Institute of Metabolic Disease Research and Drug Development, China Medical University Shenyang, China
| | - Rui Feng
- Laboratory of Metabolic Brain Diseases, Institute of Metabolic Disease Research and Drug Development, China Medical University Shenyang, China
| | - Alexei Verkhratsky
- Faculty of Life Sciences, The University of ManchesterManchester, UK; Achucarro Center for Neuroscience, Basque Foundation for ScienceBilbao, Spain
| | - Liang Peng
- Laboratory of Metabolic Brain Diseases, Institute of Metabolic Disease Research and Drug Development, China Medical University Shenyang, China
| |
Collapse
|