1
|
Chen YQ, Wu MC, Wei MT, Kuo JC, Yu HW, Chiou A. High-viscosity driven modulation of biomechanical properties of human mesenchymal stem cells promotes osteogenic lineage. Mater Today Bio 2024; 26:101058. [PMID: 38681057 PMCID: PMC11046220 DOI: 10.1016/j.mtbio.2024.101058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 01/15/2024] [Revised: 04/10/2024] [Accepted: 04/13/2024] [Indexed: 05/01/2024] Open
Abstract
Biomechanical cues could effectively govern cell gene expression to direct the differentiation of specific stem cell lineage. Recently, the medium viscosity has emerged as a significant mechanical stimulator that regulates the cellular mechanical properties and various physiological functions. However, whether the medium viscosity can regulate the mechanical properties of human mesenchymal stem cells (hMSCs) to effectively trigger osteogenic differentiation remains uncertain. The mechanism by which cells sense and respond to changes in medium viscosity, and regulate cell mechanical properties to promote osteogenic lineage, remains elusive. In this study, we demonstrated that hMSCs, cultured in a high-viscosity medium, exhibited larger cell spreading area and higher intracellular tension, correlated with elevated formation of actin stress fibers and focal adhesion maturation. Furthermore, these changes observed in hMSCs were associated with activation of TRPV4 (transient receptor potential vanilloid sub-type 4) channels on the cell membrane. This feedback loop among TRPV4 activation, cell spreading and intracellular tension results in calcium influx, which subsequently promotes the nuclear localization of NFATc1 (nuclear factor of activated T cells 1). Concomitantly, the elevated intracellular tension induced nuclear deformation and promoted the nuclear localization of YAP (YES-associated protein). The concurrent activation of NFATc1 and YAP significantly enhanced alkaline phosphatase (ALP) for pre-osteogenic activity. Taken together, these findings provide a more comprehensive view of how viscosity-induced alterations in biomechanical properties of MSCs impact the expression of osteogenesis-related genes, and ultimately promote osteogenic lineage.
Collapse
Affiliation(s)
- Yin-Quan Chen
- Cancer Progression Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Ming-Chung Wu
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Ming-Tzo Wei
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, USA
| | - Jean-Cheng Kuo
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Helen Wenshin Yu
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Arthur Chiou
- Institute of Biophotonics, National Yang Ming Chiao Tung University, Taipei, Taiwan
| |
Collapse
|
2
|
Kuwashima Y, Yanagawa M, Maekawa M, Abe M, Sako Y, Arita M. TRPV4-dependent Ca 2+ influx determines cholesterol dynamics at the plasma membrane. Biophys J 2024; 123:867-884. [PMID: 38433447 PMCID: PMC10995426 DOI: 10.1016/j.bpj.2024.02.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 12/01/2023] [Accepted: 02/29/2024] [Indexed: 03/05/2024] Open
Abstract
The activities of the transient receptor potential vanilloid 4 (TRPV4), a Ca2+-permeable nonselective cation channel, are controlled by its surrounding membrane lipids (e.g., cholesterol, phosphoinositides). The transmembrane region of TRPV4 contains a cholesterol recognition amino acid consensus (CRAC) motif and its inverted (CARC) motif located in the plasmalemmal cytosolic leaflet. TRPV4 localizes in caveolae, a bulb-shaped cholesterol-rich domain at the plasma membrane. Here, we visualized the spatiotemporal interactions between TRPV4 and cholesterol at the plasma membrane in living cells by dual-color single-molecule imaging using total internal reflection fluorescence microscopy. To this aim, we labeled cholesterol at the cytosolic leaflets of the plasma membrane using a cholesterol biosensor, D4H. Our single-molecule tracking analysis showed that the TRPV4 molecules colocalize with D4H-accessible cholesterol molecules mainly in the low fluidity membrane domains in which both molecules are highly clustered. Colocalization of TRPV4 and D4H-accessible cholesterol was observed both inside and outside of caveolae. Agonist-evoked TRPV4 activation remarkably decreased colocalization probability and association rate between TRPV4 and D4H-accessible cholesterol molecules. Interestingly, upon TRPV4 activation, the particle density of D4H-accessible cholesterol molecules was decreased and the D4H-accessible cholesterol molecules in the fast-diffusing state were increased at the plasma membrane. The introduction of skeletal dysplasia-associated R616Q mutation into the CRAC/CARC motif of TRPV4, which reduced the interaction with cholesterol clusters, could not alter the D4H-accessible cholesterol dynamics. Mechanistically, TRPV4-mediated Ca2+ influx and the C-terminal calmodulin-binding site of TRPV4 are essential for modulating the plasmalemmal D4H-accessible cholesterol dynamics. We propose that TRPV4 remodels its surrounding plasmalemmal environment by manipulating cholesterol dynamics through Ca2+ influx.
Collapse
Affiliation(s)
- Yutaro Kuwashima
- Division of Physiological Chemistry and Metabolism, Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, Japan; Cellular Informatics Laboratory, RIKEN Cluster for Pioneering Research (CPR), Saitama, Japan
| | - Masataka Yanagawa
- Cellular Informatics Laboratory, RIKEN Cluster for Pioneering Research (CPR), Saitama, Japan; Molecular and Cellular Biochemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Masashi Maekawa
- Division of Physiological Chemistry and Metabolism, Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, Japan; Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences (IMS), Kanagawa, Japan
| | - Mitsuhiro Abe
- Cellular Informatics Laboratory, RIKEN Cluster for Pioneering Research (CPR), Saitama, Japan
| | - Yasushi Sako
- Cellular Informatics Laboratory, RIKEN Cluster for Pioneering Research (CPR), Saitama, Japan.
| | - Makoto Arita
- Division of Physiological Chemistry and Metabolism, Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, Japan; Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences (IMS), Kanagawa, Japan; Cellular and Molecular Epigenetics Laboratory, Graduate School of Medical Life Science, Yokohama City University, Kanagawa, Japan; Human Biology-Microbiome-Quantum Research Center (WPI-Bio2Q), Keio University, Tokyo, Japan.
| |
Collapse
|
3
|
Lugo E, Graulau E, Ramos Cortes E, Carlo S, Ramírez N. Homozygous TRPV4 Mutation Broadens the Phenotypic Spectrum of Congenital Spinal Muscular Atrophy and Arthrogryposis: A Case Report. Cureus 2023; 15:e43413. [PMID: 37706131 PMCID: PMC10495693 DOI: 10.7759/cureus.43413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2023] [Indexed: 09/15/2023] Open
Abstract
Transient receptor potential vanilloid 4 (TRPV4) mutations are known to cause inherited axonal neuropathies and skeletal dysplasia. TRPV4 mutations are associated with distal hereditary motor neuropathies (dHMN), which distinctly involve motor deficits. A 1 ½-year-old boy presented at the clinic with diminished lower limb movement and ambulatory limitations. The patient was born with bilateral knee arthrogryposis and bilateral talipes equinovarus, which required surgical intervention. A gross neurologic exam was unremarkable, with normal vision and hearing. A bone survey radiograph showed no evidence of skeletal dysplasia. Genetic tests revealed a homozygous mutation in the TRPV4 gene (c.281C>T; p.S94L), leading to the diagnosis of congenital spinal muscular atrophy and arthrogryposis (CSMAA). Hence, this presents the first case of CSMAA caused by a TRPV4 mutation (p.S94L), with a different presentation from the one previously described in the literature, thus broadening the phenotypic variability and clinical spectrum of TRPV4 mutations.
Collapse
Affiliation(s)
- Elyette Lugo
- Medicine, Universidad Central del Caribe, Bayamón, PRI
| | - Eric Graulau
- Medicine, Ponce Health Sciences University, Ponce, PRI
| | - Edwardo Ramos Cortes
- Physical Medicine and Rehabilitation, University of Puerto Rico, Medical Sciences Campus, San Juan, PRI
| | - Simón Carlo
- Biochemistry/Pediatrics/Psychiatry, Ponce Health Sciences University, Ponce, PRI
- Pediatrics, Mayagüez Medical Center, Mayagüez, PRI
| | - Norman Ramírez
- Medicine, Universidad Central del Caribe, Bayamón, PRI
- Pediatric Orthopedic Surgery, Mayagüez Medical Center, Mayagüez, PRI
- Medicine, Ponce Health Sciences University, Ponce, PRI
| |
Collapse
|
4
|
Kwon DH, Zhang F, McCray BA, Kumar M, Sullivan JM, Sumner CJ, Lee SY. Structural insights into TRPV4-Rho GTPase signaling complex function and disease. bioRxiv 2023:2023.03.15.532784. [PMID: 36993766 PMCID: PMC10055143 DOI: 10.1101/2023.03.15.532784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Crosstalk between ion channels and small GTPases is critical during homeostasis and disease 1 , but little is known about the structural underpinnings of these interactions. TRPV4 is a polymodal, calcium-permeable cation channel that has emerged as a potential therapeutic target in multiple conditions 2-5 . Gain-of-function mutations also cause hereditary neuromuscular disease 6-11 . Here, we present cryo-EM structures of human TRPV4 in complex with RhoA in the apo, antagonist-bound closed, and agonist-bound open states. These structures reveal the mechanism of ligand-dependent TRPV4 gating. Channel activation is associated with rigid-body rotation of the intracellular ankyrin repeat domain, but state-dependent interaction with membrane-anchored RhoA constrains this movement. Notably, many residues at the TRPV4-RhoA interface are mutated in disease and perturbing this interface by introducing mutations into either TRPV4 or RhoA increases TRPV4 channel activity. Together, these results suggest that the interaction strength between TRPV4 and RhoA tunes TRPV4-mediated calcium homeostasis and actin remodeling, and that disruption of TRPV4-RhoA interactions leads to TRPV4-related neuromuscular disease, findings that will guide TRPV4 therapeutics development.
Collapse
|
5
|
Dicks AR, Maksaev GI, Harissa Z, Savadipour A, Tang R, Steward N, Liedtke W, Nichols CG, Wu CL, Guilak F. Skeletal dysplasia-causing TRPV4 mutations suppress the hypertrophic differentiation of human iPSC-derived chondrocytes. eLife 2023; 12:e71154. [PMID: 36810131 PMCID: PMC9949800 DOI: 10.7554/elife.71154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 02/03/2023] [Indexed: 02/24/2023] Open
Abstract
Mutations in the TRPV4 ion channel can lead to a range of skeletal dysplasias. However, the mechanisms by which TRPV4 mutations lead to distinct disease severity remain unknown. Here, we use CRISPR-Cas9-edited human-induced pluripotent stem cells (hiPSCs) harboring either the mild V620I or lethal T89I mutations to elucidate the differential effects on channel function and chondrogenic differentiation. We found that hiPSC-derived chondrocytes with the V620I mutation exhibited increased basal currents through TRPV4. However, both mutations showed more rapid calcium signaling with a reduced overall magnitude in response to TRPV4 agonist GSK1016790A compared to wildtype (WT). There were no differences in overall cartilaginous matrix production, but the V620I mutation resulted in reduced mechanical properties of cartilage matrix later in chondrogenesis. mRNA sequencing revealed that both mutations up-regulated several anterior HOX genes and down-regulated antioxidant genes CAT and GSTA1 throughout chondrogenesis. BMP4 treatment up-regulated several essential hypertrophic genes in WT chondrocytes; however, this hypertrophic maturation response was inhibited in mutant chondrocytes. These results indicate that the TRPV4 mutations alter BMP signaling in chondrocytes and prevent proper chondrocyte hypertrophy, as a potential mechanism for dysfunctional skeletal development. Our findings provide potential therapeutic targets for developing treatments for TRPV4-mediated skeletal dysplasias.
Collapse
Affiliation(s)
- Amanda R Dicks
- Department of Biomedical Engineering, Washington University in St. LouisSt LouisUnited States
- Department of Orthopedic Surgery, Washington University School of Medicine, St. LouisSt LouisUnited States
- Shriners Hospitals for Children - St. LouisSt. LouisUnited States
| | - Grigory I Maksaev
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. LouisSt LouisUnited States
| | - Zainab Harissa
- Department of Biomedical Engineering, Washington University in St. LouisSt LouisUnited States
- Department of Orthopedic Surgery, Washington University School of Medicine, St. LouisSt LouisUnited States
- Shriners Hospitals for Children - St. LouisSt. LouisUnited States
| | - Alireza Savadipour
- Department of Orthopedic Surgery, Washington University School of Medicine, St. LouisSt LouisUnited States
- Shriners Hospitals for Children - St. LouisSt. LouisUnited States
- Department of Mechanical Engineering and Material Science, Washington University in St. LouisSt. LouisUnited States
| | - Ruhang Tang
- Department of Orthopedic Surgery, Washington University School of Medicine, St. LouisSt LouisUnited States
- Shriners Hospitals for Children - St. LouisSt. LouisUnited States
| | - Nancy Steward
- Department of Orthopedic Surgery, Washington University School of Medicine, St. LouisSt LouisUnited States
- Shriners Hospitals for Children - St. LouisSt. LouisUnited States
| | - Wolfgang Liedtke
- Department of Neurology, Duke University School of MedicineDurhamUnited States
- Department of Molecular Pathobiology - NYU College of DentistryNew YorkUnited States
| | - Colin G Nichols
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. LouisSt LouisUnited States
| | - Chia-Lung Wu
- Department of Orthopaedics and Rehabilitation, Center for Musculoskeletal Research, University of RochesterRochesterUnited States
| | - Farshid Guilak
- Department of Orthopedic Surgery, Washington University School of Medicine, St. LouisSt LouisUnited States
- Shriners Hospitals for Children - St. LouisSt. LouisUnited States
| |
Collapse
|
6
|
Shin M, Mori S, Mizoguchi T, Arai A, Kajiya H, Okamoto F, Bartlett JD, Matsushita M, Udagawa N, Okabe K. Mesenchymal cell TRPM7 expression is required for bone formation via the regulation of chondrogenesis. Bone 2023; 166:116579. [PMID: 36210025 DOI: 10.1016/j.bone.2022.116579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/20/2022] [Accepted: 10/03/2022] [Indexed: 11/07/2022]
Abstract
Transient receptor potential melastatin-subfamily member 7 (TRPM7) is a bifunctional protein containing a kinase fused to an ion channel permeated with cations, including Ca2+ and Mg2+. Trpm7-null mice show embryonic lethality. Paired related homeobox 1 (Prx1) is expressed in undifferentiated mesenchymal cells such as the progenitor cells of both chondrocytes and osteoblasts involved in limb skeleton formation. Prx1-Cre-dependent Trpm7 mesenchymal-deleted mice were generated to examine the role of TRPM7 in bone development. We found that Prx1-Cre;Trpm7fl/fl mice had shortened bones and impaired trabecular bone formation. Trabecular bone parameters, such as the bone volume (BV/TV), and trabecular number (Tb.N), were decreased in Prx1-Cre;Trpm7fl/fl mice. The cortical bone parameters of cortical bone area (Ct.Ar) and cortical bone thickness (Ct.Th) were also down-regulated in these mice. The bone formation rate in Prx1-Cre;Trpm7fl/fl mice was unchanged, but the hypertrophic area and cell size of the zone were smaller, and the expression of Col2a1, Col10a1 and Mmp13 was downregulated compared with control mice. These findings suggest impaired chondrogenesis in Prx1-Cre;Trpm7fl/fl mice compared to control mice. The receptor activator of nuclear factor-kappa B ligand (RANKL) expression was increased, and RANKL-positive cells and osteoclasts were markedly accumulated in the boundary region between the growth plate and trabecular bone. In contrast, TRPM7 KR mice, which are kinase-dead mutants in which the TRPM7 ion channel function has not been altered, showed no marked differences in trabecular or cortical bone parameters compared to wild-type mice. These findings suggest that TRPM7 is critical as a cation channel rather than as a kinase in bone development via the regulation of chondrogenesis.
Collapse
Affiliation(s)
- Masashi Shin
- Section of Cellular Physiology, Department of Physiological Science and Molecular Biology, Fukuoka Dental College, Fukuoka, Japan; Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan
| | - Shihomi Mori
- Section of Oral Surgery, Department of Oral and Maxillofacial Surgery, Fukuoka Dental College, Fukuoka, Japan
| | | | - Atsushi Arai
- Department of Orthodontics, Matsumoto Dental University, Nagano, Japan
| | - Hiroshi Kajiya
- Section of Cellular Physiology, Department of Physiological Science and Molecular Biology, Fukuoka Dental College, Fukuoka, Japan; Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan
| | - Fujio Okamoto
- Section of Cellular Physiology, Department of Physiological Science and Molecular Biology, Fukuoka Dental College, Fukuoka, Japan
| | - John D Bartlett
- Division of Biosciences, Ohio State University, College of Dentistry, Columbus, OH, USA
| | - Masayuki Matsushita
- Department of Molecular and Cellular Physiology, University of the Ryukyus, Okinawa, Japan
| | - Nobuyuki Udagawa
- Department of Biochemistry, Matsumoto Dental University, Nagano, Japan
| | - Koji Okabe
- Section of Cellular Physiology, Department of Physiological Science and Molecular Biology, Fukuoka Dental College, Fukuoka, Japan.
| |
Collapse
|
7
|
Zhang Y, Liang P, Yang L, Shan KZ, Feng L, Chen Y, Liedtke W, Coyne CB, Yang H. Functional coupling between TRPV4 channel and TMEM16F modulates human trophoblast fusion. eLife 2022; 11:e78840. [PMID: 35670667 PMCID: PMC9236608 DOI: 10.7554/elife.78840] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/05/2022] [Indexed: 11/15/2022] Open
Abstract
TMEM16F, a Ca2+-activated phospholipid scramblase (CaPLSase), is critical for placental trophoblast syncytialization, HIV infection, and SARS-CoV2-mediated syncytialization, however, how TMEM16F is activated during cell fusion is unclear. Here, using trophoblasts as a model for cell fusion, we demonstrate that Ca2+ influx through the Ca2+ permeable transient receptor potential vanilloid channel TRPV4 is critical for TMEM16F activation and plays a role in subsequent human trophoblast fusion. GSK1016790A, a TRPV4 specific agonist, robustly activates TMEM16F in trophoblasts. We also show that TRPV4 and TMEM16F are functionally coupled within Ca2+ microdomains in a human trophoblast cell line using patch-clamp electrophysiology. Pharmacological inhibition or gene silencing of TRPV4 hinders TMEM16F activation and subsequent trophoblast syncytialization. Our study uncovers the functional expression of TRPV4 and one of the physiological activation mechanisms of TMEM16F in human trophoblasts, thus providing us with novel strategies to regulate CaPLSase activity as a critical checkpoint of physiologically and disease-relevant cell fusion events.
Collapse
Affiliation(s)
- Yang Zhang
- Department of Biochemistry, Duke University Medical CenterDurhamUnited States
| | - Pengfei Liang
- Department of Biochemistry, Duke University Medical CenterDurhamUnited States
| | - Liheng Yang
- Department of Molecular Genetics and Microbiology, Duke University Medical CenterDurhamUnited States
| | - Ke Zoe Shan
- Department of Biochemistry, Duke University Medical CenterDurhamUnited States
| | - Liping Feng
- Department of Obstetrics and Gynecology, Duke University Medical CentreDurhamUnited States
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua HospitalShanghaiChina
| | - Yong Chen
- Department of Neurology, Duke University Medical CenterDurhamUnited States
| | - Wolfgang Liedtke
- Department of Neurology, Duke University Medical CenterDurhamUnited States
- Department of Anesthesiology, Duke University Medical CenterDurhamUnited States
- Department of Neurobiology, Duke University Medical CenterDurhamUnited States
- College of Dentistry, Department of Molecular Pathobiology, NYUNew YorkUnited States
| | - Carolyn B Coyne
- Department of Molecular Genetics and Microbiology, Duke University Medical CenterDurhamUnited States
- Duke Human Vaccine Institute, Duke UniversityDurhamUnited States
| | - Huanghe Yang
- Department of Biochemistry, Duke University Medical CenterDurhamUnited States
- Department of Neurobiology, Duke University Medical CenterDurhamUnited States
| |
Collapse
|
8
|
Wang L, You X, Zhang L, Zhang C, Zou W. Mechanical regulation of bone remodeling. Bone Res 2022; 10:16. [PMID: 35181672 DOI: 10.1038/s41413-022-00190-4] [Citation(s) in RCA: 103] [Impact Index Per Article: 51.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 11/04/2021] [Accepted: 12/13/2021] [Indexed: 12/17/2022] Open
Abstract
Bone remodeling is a lifelong process that gives rise to a mature, dynamic bone structure via a balance between bone formation by osteoblasts and resorption by osteoclasts. These opposite processes allow the accommodation of bones to dynamic mechanical forces, altering bone mass in response to changing conditions. Mechanical forces are indispensable for bone homeostasis; skeletal formation, resorption, and adaptation are dependent on mechanical signals, and loss of mechanical stimulation can therefore significantly weaken the bone structure, causing disuse osteoporosis and increasing the risk of fracture. The exact mechanisms by which the body senses and transduces mechanical forces to regulate bone remodeling have long been an active area of study among researchers and clinicians. Such research will lead to a deeper understanding of bone disorders and identify new strategies for skeletal rejuvenation. Here, we will discuss the mechanical properties, mechanosensitive cell populations, and mechanotransducive signaling pathways of the skeletal system.
Collapse
|
9
|
York JM, Zakon HH. OUP accepted manuscript. Genome Biol Evol 2022; 14:6519823. [PMID: 35106545 PMCID: PMC8857925 DOI: 10.1093/gbe/evac009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2022] [Indexed: 11/14/2022] Open
Abstract
Animals rely on their sensory systems to inform them of ecologically relevant environmental variation. In the Southern Ocean, the thermal environment has remained between −1.9 and 5 °C for 15 Myr, yet we have no knowledge of how an Antarctic marine organism might sense their thermal habitat as we have yet to discover a thermosensitive ion channel that gates (opens/closes) below 10 °C. Here, we investigate the evolutionary dynamics of transient receptor potential (TRP) channels, which are the primary thermosensors in animals, within cryonotothenioid fishes—the dominant fish fauna of the Southern Ocean. We found cryonotothenioids have a similar complement of TRP channels as other teleosts (∼28 genes). Previous work has shown that thermosensitive gating in a given channel is species specific, and multiple channels act together to sense the thermal environment. Therefore, we combined evidence of changes in selective pressure, gene gain/loss dynamics, and the first sensory ganglion transcriptome in this clade to identify the best candidate TRP channels that might have a functional dynamic range relevant for frigid Antarctic temperatures. We concluded that TRPV1a, TRPA1b, and TRPM4 are the likeliest putative thermosensors, and found evidence of diversifying selection at sites across these proteins. We also put forward hypotheses for molecular mechanisms of other cryonotothenioid adaptations, such as reduced skeletal calcium deposition, sensing oxidative stress, and unusual magnesium homeostasis. By completing a comprehensive and unbiased survey of these genes, we lay the groundwork for functional characterization and answering long-standing thermodynamic questions of thermosensitive gating and protein adaptation to low temperatures.
Collapse
Affiliation(s)
- Julia M York
- Department of Integrative Biology, University of Texas at Austin, USA
- Corresponding author: E-mail:
| | - Harold H Zakon
- Department of Integrative Biology, University of Texas at Austin, USA
| |
Collapse
|
10
|
Orsini EM, Perelas A, Southern BD, Grove LM, Olman MA, Scheraga RG. Stretching the Function of Innate Immune Cells. Front Immunol 2021; 12:767319. [PMID: 34795674 PMCID: PMC8593101 DOI: 10.3389/fimmu.2021.767319] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 08/30/2021] [Accepted: 10/11/2021] [Indexed: 11/13/2022] Open
Abstract
The importance of innate immune cells to sense and respond to their physical environment is becoming increasingly recognized. Innate immune cells (e.g. macrophages and neutrophils) are able to receive mechanical signals through several mechanisms. In this review, we discuss the role of mechanosensitive ion channels, such as Piezo1 and transient receptor potential vanilloid 4 (TRPV4), and cell adhesion molecules, such as integrins, selectins, and cadherins in biology and human disease. Furthermore, we explain that these mechanical stimuli activate intracellular signaling pathways, such as MAPK (p38, JNK), YAP/TAZ, EDN1, NF-kB, and HIF-1α, to induce protein conformation changes and modulate gene expression to drive cellular function. Understanding the mechanisms by which immune cells interpret mechanosensitive information presents potential targets to treat human disease. Important areas of future study in this area include autoimmune, allergic, infectious, and malignant conditions.
Collapse
Affiliation(s)
- Erica M Orsini
- Respiratory Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Apostolos Perelas
- Department of Pulmonary and Critical Care, Virginia Commonwealth University, Richmond, VA, United States
| | - Brian D Southern
- Respiratory Institute, Cleveland Clinic, Cleveland, OH, United States.,Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Lisa M Grove
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Mitchell A Olman
- Respiratory Institute, Cleveland Clinic, Cleveland, OH, United States.,Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| | - Rachel G Scheraga
- Respiratory Institute, Cleveland Clinic, Cleveland, OH, United States.,Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, United States
| |
Collapse
|
11
|
Al Madhoun A, Sindhu S, Haddad D, Atari M, Ahmad R, Al-Mulla F. Dental Pulp Stem Cells Derived From Adult Human Third Molar Tooth: A Brief Review. Front Cell Dev Biol 2021; 9:717624. [PMID: 34712658 PMCID: PMC8545885 DOI: 10.3389/fcell.2021.717624] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [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: 05/31/2021] [Accepted: 09/15/2021] [Indexed: 12/13/2022] Open
Abstract
The fields of regenerative medicine and stem cell-based tissue engineering have the potential of treating numerous tissue and organ defects. The use of adult stem cells is of particular interest when it comes to dynamic applications in translational medicine. Recently, dental pulp stem cells (DPSCs) have been traced in third molars of adult humans. DPSCs have been isolated and characterized by several groups. DPSCs have promising characteristics including self-renewal capacity, rapid proliferation, colony formation, multi-lineage differentiation, and pluripotent gene expression profile. Nevertheless, genotypic, and phenotypic heterogeneities have been reported for DPSCs subpopulations which may influence their therapeutic potentials. The underlying causes of DPSCs’ heterogeneity remain poorly understood; however, their heterogeneity emerges as a consequence of an interplay between intrinsic and extrinsic cellular factors. The main objective of the manuscript is to review the current literature related to the human DPSCs derived from the third molar, with a focus on their physiological properties, isolation procedures, culture conditions, self-renewal, proliferation, lineage differentiation capacities and their prospective advances use in pre-clinical and clinical applications.
Collapse
Affiliation(s)
- Ashraf Al Madhoun
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman, Kuwait.,Department of Animal and Imaging Core Facilities, Dasman Diabetes Institute, Dasman, Kuwait
| | - Sardar Sindhu
- Department of Animal and Imaging Core Facilities, Dasman Diabetes Institute, Dasman, Kuwait.,Department of Immunology and Microbiology, Dasman Diabetes Institute, Dasman, Kuwait
| | - Dania Haddad
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman, Kuwait
| | - Maher Atari
- Biointelligence Technology Systems S.L., Barcelona, Spain
| | - Rasheed Ahmad
- Department of Immunology and Microbiology, Dasman Diabetes Institute, Dasman, Kuwait
| | - Fahd Al-Mulla
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman, Kuwait
| |
Collapse
|
12
|
Jack CF, Birkemeier KL, Santiago JM, Macmurdo CF, Crisp MB. Magnetic resonance imaging diagnosis of a skeletal dysplasia mimicking erosive arthropathy. Pediatr Radiol 2021; 51:1758-1761. [PMID: 33710406 DOI: 10.1007/s00247-021-05027-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 01/07/2021] [Accepted: 02/17/2021] [Indexed: 11/29/2022]
Abstract
This case report of a 14-year-old boy with arthralgia and clinically suspected inflammatory arthropathy highlights how magnetic resonance imaging (MRI) ultimately diagnosed skeletal dysplasia. A genetic evaluation revealed a transient receptor potential vanilloid 4 (TRPV4) pathogenic variant. This is a rare description of the MRI appearance of this type of dysplasia in long bone epiphyses corresponding with the histological findings of disrupted endochondral ossification. This report offers imaging support to the description of endochondral bone growth disruption in TRPV4-related skeletal dysplasias.
Collapse
Affiliation(s)
- Christina F Jack
- Texas A&M Health Science Center, College of Medicine, Temple, TX, USA
| | - Krista L Birkemeier
- Department of Radiology, Baylor Scott & White McLane Children's Medical Center, Texas A&M University Health Sciences, 2401 S. 31st St., MS-01-W256, Temple, TX, USA.
| | - Jose M Santiago
- Department of Radiology, Scott & White Medical Center, Temple, TX, USA
| | - Colleen F Macmurdo
- Division of Medical Genetics, Department of Internal Medicine, Scott & White Medical Center, Temple, TX, USA
| | - Matthew B Crisp
- Department of Radiology, Scott & White Medical Center, Temple, TX, USA
| |
Collapse
|
13
|
Ürel-Demir G, Şimşek-Kiper PÖ, Öncel İ, Utine GE, Haliloğlu G, Boduroğlu K. Natural history of TRPV4-Related disorders: From skeletal dysplasia to neuromuscular phenotype. Eur J Paediatr Neurol 2021; 32:46-55. [PMID: 33774370 DOI: 10.1016/j.ejpn.2021.03.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 03/10/2021] [Accepted: 03/10/2021] [Indexed: 12/29/2022]
Abstract
TRPV4-related disorders constitute a broad spectrum of clinical phenotypes including several genetic skeletal and neuromuscular disorders, in which clinical variability and somewhat overlapping features are present. These disorders have previously been considered to be clinically distinct phenotypes before their molecular basis was discovered. However, with the identification of TRPV4 variants in the etiology, they are referred as TRPV4-related disorders (TRPV4-pathies), and are now mainly grouped into skeletal dysplasias and neuromuscular disorders. The skeletal dysplasia group includes metatropic dysplasia, parastremmatic dysplasia, spondyloepiphyseal dysplasia Maroteaux type, spondylometaphyseal dysplasia Kozlowski type, autosomal dominant brachyolmia, and familial digital arthropathy-brachydactyly, whereas the neuromuscular group includes congenital distal spinal muscular atrophy (SMA), scapuloperoneal SMA and Charcot-Marie-Tooth neuropathy type 2C with common manifestations of peripheral neuropathy, joint contractures, and respiratory system involvement. Apart from familial digital arthropathy-brachydactyly, skeletal dysplasia associated with TRPV4 pathogenic variants share some clinical features such as short stature with short trunk, spinal and pelvic changes with varying degrees of long bone involvement. Of note, there is considerable phenotypic overlap within and between both groups. Herein, we report on the clinical and molecular spectrum of 11 patients from six different families diagnosed with TRPV4-related disorders. This study yet represents the largest cohort of patients with TRPV4 variants from a single center in Turkey.
Collapse
Affiliation(s)
- Gizem Ürel-Demir
- Department of Pediatric Genetics, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey.
| | - Pelin Özlem Şimşek-Kiper
- Department of Pediatric Genetics, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - İbrahim Öncel
- Department of Pediatric Neurology, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Gülen Eda Utine
- Department of Pediatric Genetics, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Göknur Haliloğlu
- Department of Pediatric Neurology, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Koray Boduroğlu
- Department of Pediatric Genetics, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| |
Collapse
|
14
|
Aloum L, Alefishat E, Shaya J, Petroianu GA. Remedia Sternutatoria over the Centuries: TRP Mediation. Molecules 2021; 26:molecules26061627. [PMID: 33804078 PMCID: PMC7998681 DOI: 10.3390/molecules26061627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/03/2021] [Accepted: 03/05/2021] [Indexed: 11/16/2022] Open
Abstract
Sneezing (sternutatio) is a poorly understood polysynaptic physiologic reflex phenomenon. Sneezing has exerted a strange fascination on humans throughout history, and induced sneezing was widely used by physicians for therapeutic purposes, on the assumption that sneezing eliminates noxious factors from the body, mainly from the head. The present contribution examines the various mixtures used for inducing sneezes (remedia sternutatoria) over the centuries. The majority of the constituents of the sneeze-inducing remedies are modulators of transient receptor potential (TRP) channels. The TRP channel superfamily consists of large heterogeneous groups of channels that play numerous physiological roles such as thermosensation, chemosensation, osmosensation and mechanosensation. Sneezing is associated with the activation of the wasabi receptor, (TRPA1), typical ligand is allyl isothiocyanate and the hot chili pepper receptor, (TRPV1), typical agonist is capsaicin, in the vagal sensory nerve terminals, activated by noxious stimulants.
Collapse
Affiliation(s)
- Lujain Aloum
- Department of Pharmacology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; (L.A.); (E.A.)
| | - Eman Alefishat
- Department of Pharmacology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; (L.A.); (E.A.)
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
- Department of Biopharmaceutics and Clinical Pharmacy, Faculty of Pharmacy, The University of Jordan, Amman 11941, Jordan
| | - Janah Shaya
- Pre-Medicine Bridge Program, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates;
| | - Georg A. Petroianu
- Department of Pharmacology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; (L.A.); (E.A.)
- Correspondence: ; Tel.: +971-50-413-4525
| |
Collapse
|
15
|
McCray BA, Diehl E, Sullivan JM, Aisenberg WH, Zaccor NW, Lau AR, Rich DJ, Goretzki B, Hellmich UA, Lloyd TE, Sumner CJ. Neuropathy-causing TRPV4 mutations disrupt TRPV4-RhoA interactions and impair neurite extension. Nat Commun 2021; 12:1444. [PMID: 33664271 DOI: 10.1038/s41467-021-21699-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 02/02/2021] [Indexed: 12/19/2022] Open
Abstract
TRPV4 is a cell surface-expressed calcium-permeable cation channel that mediates cell-specific effects on cellular morphology and function. Dominant missense mutations of TRPV4 cause distinct, tissue-specific diseases, but the pathogenic mechanisms are unknown. Mutations causing peripheral neuropathy localize to the intracellular N-terminal domain whereas skeletal dysplasia mutations are in multiple domains. Using an unbiased screen, we identified the cytoskeletal remodeling GTPase RhoA as a TRPV4 interactor. TRPV4-RhoA binding occurs via the TRPV4 N-terminal domain, resulting in suppression of TRPV4 channel activity, inhibition of RhoA activation, and extension of neurites in vitro. Neuropathy but not skeletal dysplasia mutations disrupt TRPV4-RhoA binding and cytoskeletal outgrowth. However, inhibition of RhoA restores neurite length in vitro and in a fly model of TRPV4 neuropathy. Together these results identify RhoA as a critical mediator of TRPV4-induced cell structure changes and suggest that disruption of TRPV4-RhoA binding may contribute to tissue-specific toxicity of TRPV4 neuropathy mutations. TRPV4 dominant mutations cause neuropathy. Here, the authors show that TRPV4 binds and interacts with RhoA, modulating the actin cytoskeleton. Neuropathy-causing mutations of TRPV4 disrupt this complex, leading to RhoA activation and impairment of neurite extension in cultured cells and flies.
Collapse
|
16
|
Masuda K, Han X, Kato H, Sato H, Zhang Y, Sun X, Hirofuji Y, Yamaza H, Yamada A, Fukumoto S. Dental Pulp-Derived Mesenchymal Stem Cells for Modeling Genetic Disorders. Int J Mol Sci 2021; 22:ijms22052269. [PMID: 33668763 PMCID: PMC7956585 DOI: 10.3390/ijms22052269] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/18/2021] [Accepted: 02/23/2021] [Indexed: 12/20/2022] Open
Abstract
A subpopulation of mesenchymal stem cells, developmentally derived from multipotent neural crest cells that form multiple facial tissues, resides within the dental pulp of human teeth. These stem cells show high proliferative capacity in vitro and are multipotent, including adipogenic, myogenic, osteogenic, chondrogenic, and neurogenic potential. Teeth containing viable cells are harvested via minimally invasive procedures, based on various clinical diagnoses, but then usually discarded as medical waste, indicating the relatively low ethical considerations to reuse these cells for medical applications. Previous studies have demonstrated that stem cells derived from healthy subjects are an excellent source for cell-based medicine, tissue regeneration, and bioengineering. Furthermore, stem cells donated by patients affected by genetic disorders can serve as in vitro models of disease-specific genetic variants, indicating additional applications of these stem cells with high plasticity. This review discusses the benefits, limitations, and perspectives of patient-derived dental pulp stem cells as alternatives that may complement other excellent, yet incomplete stem cell models, such as induced pluripotent stem cells, together with our recent data.
Collapse
Affiliation(s)
- Keiji Masuda
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan; (X.H.); (H.S.); (Y.Z.); (X.S.); (Y.H.); (H.Y.)
- Correspondence: (K.M.); (S.F.); Tel.: +81-92-642-6402 (K.M. & S.F.)
| | - Xu Han
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan; (X.H.); (H.S.); (Y.Z.); (X.S.); (Y.H.); (H.Y.)
| | - Hiroki Kato
- Department of Molecular Cell Biology and Oral Anatomy, Graduate School of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan;
| | - Hiroshi Sato
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan; (X.H.); (H.S.); (Y.Z.); (X.S.); (Y.H.); (H.Y.)
| | - Yu Zhang
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan; (X.H.); (H.S.); (Y.Z.); (X.S.); (Y.H.); (H.Y.)
| | - Xiao Sun
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan; (X.H.); (H.S.); (Y.Z.); (X.S.); (Y.H.); (H.Y.)
| | - Yuta Hirofuji
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan; (X.H.); (H.S.); (Y.Z.); (X.S.); (Y.H.); (H.Y.)
| | - Haruyoshi Yamaza
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan; (X.H.); (H.S.); (Y.Z.); (X.S.); (Y.H.); (H.Y.)
| | - Aya Yamada
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8577, Japan;
| | - Satoshi Fukumoto
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka 812-8582, Japan; (X.H.); (H.S.); (Y.Z.); (X.S.); (Y.H.); (H.Y.)
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8577, Japan;
- Correspondence: (K.M.); (S.F.); Tel.: +81-92-642-6402 (K.M. & S.F.)
| |
Collapse
|
17
|
Toft-Bertelsen TL, MacAulay N. TRPing to the Point of Clarity: Understanding the Function of the Complex TRPV4 Ion Channel. Cells 2021; 10:165. [PMID: 33467654 DOI: 10.3390/cells10010165] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/12/2021] [Accepted: 01/13/2021] [Indexed: 02/07/2023] Open
Abstract
The transient receptor potential vanilloid 4 channel (TRPV4) belongs to the mammalian TRP superfamily of cation channels. TRPV4 is ubiquitously expressed, activated by a disparate array of stimuli, interacts with a multitude of proteins, and is modulated by a range of post-translational modifications, the majority of which we are only just beginning to understand. Not surprisingly, a great number of physiological roles have emerged for TRPV4, as have various disease states that are attributable to the absence, or abnormal functioning, of this ion channel. This review will highlight structural features of TRPV4, endogenous and exogenous activators of the channel, and discuss the reported roles of TRPV4 in health and disease.
Collapse
|
18
|
Pei F, Liu J, Zhang L, Pan X, Huang W, Cen X, Huang S, Jin Y, Zhao Z. The functions of mechanosensitive ion channels in tooth and bone tissues. Cell Signal 2020; 78:109877. [PMID: 33296740 DOI: 10.1016/j.cellsig.2020.109877] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 11/12/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 02/08/2023]
Abstract
Tooth and bone are independent tissues with a close relationship. Both are composed of a highly calcified outer structure and soft inner tissue, and both are constantly under mechanical stress. In particular, the alveolar bone and tooth constitute an occlusion system and suffer from masticatory and occlusal force. Thus, mechanotransduction is a key process in many developmental, physiological and pathological processes in tooth and bone. Mechanosensitive ion channels such as Piezo1 and Piezo2 are important participants in mechanotransduction, but their functions in tooth and bone are poorly understood. This review summarizes our current understanding of mechanosensitive ion channels and their roles in tooth and bone tissues. Research in these areas may shed new light on the regulation of tooth and bone tissues and potential treatments for diseases affecting these tissues.
Collapse
Affiliation(s)
- Fang Pei
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu, PR China
| | - Jialing Liu
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu, PR China
| | - Lan Zhang
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu, PR China
| | - Xuefeng Pan
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu, PR China
| | - Wei Huang
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu, PR China
| | - Xiao Cen
- Department of the Temporomandibular Joint, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Shishu Huang
- Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu, PR China.
| | - Ying Jin
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu, PR China.
| | - Zhihe Zhao
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu, PR China.
| |
Collapse
|
19
|
Jin SS, He DQ, Wang Y, Zhang T, Yu HJ, Li ZX, Zhu LS, Zhou YH, Liu Y. Mechanical force modulates periodontal ligament stem cell characteristics during bone remodelling via TRPV4. Cell Prolif 2020; 53:e12912. [PMID: 32964544 PMCID: PMC7574874 DOI: 10.1111/cpr.12912] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/19/2020] [Accepted: 09/06/2020] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES Mechanical force plays an important role in modulating stem cell fate and behaviours. However, how periodontal ligament stem cells (PDLSCs) perceive mechanical stimulus and transfer it into biological signals, and thereby promote alveolar bone remodelling, is unclear. MATERIALS AND METHODS An animal model of force-induced tooth movement and a compressive force in vitro was used. After force application, tooth movement distance, mesenchymal stem cell and osteoclast number, and proinflammatory cytokine expression were detected in periodontal tissues. Then, rat primary PDLSCs with or without force loading were isolated, and their stem cell characteristics including clonogenicity, proliferation, multipotent differentiation and immunoregulatory properties were evaluated. Under compressive force in vitro, the effects of the ERK signalling pathway on PDLSC characteristics were evaluated by Western blotting. RESULTS Mechanical force in vivo induced PDLSC proliferation, which was accompanied with inflammatory cytokine accumulation, osteoclast differentiation and TRPV4 activation; the force-stimulated PDLSCs showed greater clonogenicity and proliferation, reduced differentiation ability, improved induction of macrophage migration, osteoclast differentiation and proinflammatory factor expression. The biological changes induced by mechanical force could be partially suppressed by TRPV4 inhibition. Mechanistically, force-induced activation of TRPV4 in PDLSCs regulated osteoclast differentiation by affecting the RANKL/OPG system via ERK signalling. CONCLUSIONS Taken together, we show here that TRPV4 activation in PDLSCs under mechanical force contributes to changing their stem cell characteristics and modulates bone remodelling during tooth movement.
Collapse
Affiliation(s)
- Shan-Shan Jin
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Dan-Qing He
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yu Wang
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Ting Zhang
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Hua-Jie Yu
- Fourth Division, Peking University Hospital of Stomatology, Beijing, China
| | - Zi-Xin Li
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Li-Sha Zhu
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yan-Heng Zhou
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yan Liu
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| |
Collapse
|
20
|
Hayes AJ, Melrose J. Aggrecan, the Primary Weight-Bearing Cartilage Proteoglycan, Has Context-Dependent, Cell-Directive Properties in Embryonic Development and Neurogenesis: Aggrecan Glycan Side Chain Modifications Convey Interactive Biodiversity. Biomolecules 2020; 10:E1244. [PMID: 32867198 PMCID: PMC7564073 DOI: 10.3390/biom10091244] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/19/2020] [Accepted: 08/23/2020] [Indexed: 02/06/2023] Open
Abstract
This review examines aggrecan's roles in developmental embryonic tissues, in tissues undergoing morphogenetic transition and in mature weight-bearing tissues. Aggrecan is a remarkably versatile and capable proteoglycan (PG) with diverse tissue context-dependent functional attributes beyond its established role as a weight-bearing PG. The aggrecan core protein provides a template which can be variably decorated with a number of glycosaminoglycan (GAG) side chains including keratan sulphate (KS), human natural killer trisaccharide (HNK-1) and chondroitin sulphate (CS). These convey unique tissue-specific functional properties in water imbibition, space-filling, matrix stabilisation or embryonic cellular regulation. Aggrecan also interacts with morphogens and growth factors directing tissue morphogenesis, remodelling and metaplasia. HNK-1 aggrecan glycoforms direct neural crest cell migration in embryonic development and is neuroprotective in perineuronal nets in the brain. The ability of the aggrecan core protein to assemble CS and KS chains at high density equips cartilage aggrecan with its well-known water-imbibing and weight-bearing properties. The importance of specific arrangements of GAG chains on aggrecan in all its forms is also a primary morphogenetic functional determinant providing aggrecan with unique tissue context dependent regulatory properties. The versatility displayed by aggrecan in biodiverse contexts is a function of its GAG side chains.
Collapse
Affiliation(s)
- Anthony J Hayes
- Bioimaging Research Hub, Cardiff School of Biosciences, Cardiff University, Cardiff CF10 3AX, Wales, UK
| | - James Melrose
- Raymond Purves Laboratory, Institute of Bone and Joint Research, Kolling Institute of Medical Research, Northern Sydney Local Health District, Royal North Shore Hospital, St. Leonards 2065, NSW, Australia
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney 2052, NSW, Australia
- Sydney Medical School, Northern, The University of Sydney, Faculty of Medicine and Health at Royal North Shore Hospital, St. Leonards 2065, NSW, Australia
| |
Collapse
|
21
|
Tchio Tchoumba MA, Bai Y, Jin R, Yu X, Male M. Metatropic Dysplasia of Nonlethal Variant in a Chinese Child - A Case Report. Orthop Surg 2019; 12:333-336. [PMID: 31808622 PMCID: PMC7031589 DOI: 10.1111/os.12546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/01/2019] [Accepted: 09/01/2019] [Indexed: 12/04/2022] Open
Abstract
Metatropic dysplasia (MD), is a rare skeletal dysplasia occurring predominantly in infants characterized by a distinctive long torso and short limbs; it is as a result of mutations in the TRPV4 gene. However, a clear distinction between various forms of skeletal dysplasias caused by the transient receptor potential vanilloid 4 (TRPV4) gene is difficult but could be achieved by a combination of gene sequencing, medical and radiological criteria. We hereby report a case of a 14‐month old girl who presented with an abnormal stature. The diagnosis of nonlethal MD was confirmed by X‐ray with dumbbell‐shaped long bones, platyspondyly, and delayed carpal ossification, as well as broadened pelvis with marginally widened ilia, epiphyseal plates, and slightly flattened acetabula. Furthermore, gene sequencing confirmed gene mutation on exon 15 of the TRPV4 gene with a heterozygous missense mutation (c.2396C > T), but no mutation was present in her parents. Our findings recorded metatropic dysplasia with the c.2396C > T mutation in the TRPV4 gene in China. This mutation caused changes in amino acid of TRPV4, which can induce growth retardation in children.
Collapse
Affiliation(s)
- Michele A Tchio Tchoumba
- Pediatric Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Bai
- Pediatric Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Runming Jin
- Pediatric Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xianying Yu
- Pediatric Department, Zhumadian City, The First People's Hospital, Zhumadian, China
| | - Musa Male
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
22
|
Hu F, Zhao Y, Hui Z, Xing F, Yang J, Lee I, Zhang X, Pan L, Xu J. Regulation of intracellular Ca2+/CaMKII signaling by TRPV4 membrane translocation during osteoblastic differentiation. Biophys Rep 2019. [DOI: 10.1007/s41048-019-00100-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
AbstractBone constantly remodels between resorption by osteoclasts and formation by osteoblasts; therefore the functions of osteoblasts are pivotal for maintaining homeostasis of bone mass. Transient receptor potential vanilloid 4 (TRPV4), a type of mechanosensitive channel, has been reported to be a key regulator in bone remodeling. However, the relationship between TRPV4 and osteoblast function remains largely elusive. Only little is known about the spatial distribution change of TRPV4 during osteoblastic differentiation and related signal events. Based on three-dimensional super-resolution microscopy, our results clearly showed a different distribution of TRPV4 in undifferentiated and differentiated osteoblasts, which reflected the plasma membrane translocation of TRPV4 along with prolonged differentiation. GSK1016790A (GSK101), the most potent agonist of TRPV4, triggered rapid calcium entry and calmodulin-dependent protein kinase II (CaMKII) phosphorylation via TRPV4 activation in a differentiation-dependent manner, indicating that the abundance of TRPV4 at the cell surface resulting from differentiation may be related to the modulation of Ca2+ response and CaMKII activity. These data provide compelling evidences for the plasma membrane translocation of TRPV4 during osteoblastic differentiation as well as demonstrate the regulation of downstream Ca2+/CaMKII signaling.
Collapse
|
23
|
Atobe M. Activation of Transient Receptor Potential Vanilloid (TRPV) 4 as a Therapeutic Strategy in Osteoarthritis. Curr Top Med Chem 2019; 19:2254-2267. [DOI: 10.2174/1568026619666191010162850] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 08/21/2019] [Accepted: 09/13/2019] [Indexed: 01/29/2023]
Abstract
Transient receptor potential vanilloid (TRPV) 4 belongs to the TRPV subfamily of TRP ion
channels. TRPV4 channels play a critical role in chondrocytes and thus TRPV4 is an attractive target of
Disease-Modifying Osteoarthritis Drugs (DMOADs). Initial investigations of small molecules by Glaxo
Smith Klein (GSK) as both agonists and antagonists via oral/intravenous administration have led to the
use of existing agonists as lead compounds for biological studies. Our recent results suggest that local
injection of a TRPV4 agonist is a potential treatment for osteoarthritis (OA). This review briefly summarizes
updates regarding TRPV4 agonists based on recent advances in drug discovery, and particularly
the local administration of TRPV4 agonists.
Collapse
Affiliation(s)
- Masakazu Atobe
- Laboratory for Medicinal Chemistry, Pharmaceutical Research Center, Asahi Kasei Pharma Corporation, 632-1 Mifuku, Izunokuni, Shizuoka 410-2321, Japan
| |
Collapse
|
24
|
Yu S, Huang S, Ding Y, Wang W, Wang A, Lu Y. Transient receptor potential ion-channel subfamily V member 4: a potential target for cancer treatment. Cell Death Dis 2019; 10:497. [PMID: 31235786 PMCID: PMC6591233 DOI: 10.1038/s41419-019-1708-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 05/13/2019] [Accepted: 05/28/2019] [Indexed: 12/29/2022]
Abstract
The transient receptor potential ion-channel superfamily consists of nonselective cation channels located mostly on the plasma membranes of numerous animal cell types, which are closely related to sensory information transmission (e.g., vision, pain, and temperature perception), as well as regulation of intracellular Ca2+ balance and physiological activities of growth and development. Transient receptor potential ion channel subfamily V (TRPV) is one of the largest and most diverse subfamilies, including TRPV1-TRPV6 involved in the regulation of a variety of cellular functions. TRPV4 can be activated by various physical and chemical stimuli, such as heat, mechanical force, and phorbol ester derivatives participating in the maintenance of normal cellular functions. In recent years, the roles of TRPV4 in cell proliferation, differentiation, apoptosis, and migration have been extensively studied. Its abnormal expression has also been closely related to the onset and progression of multiple tumors, so TRPV4 may be a target for cancer diagnosis and treatment. In this review, we focused on the latest studies concerning the role of TRPV4 in tumorigenesis and the therapeutic potential. As evidenced by the effects on cancerogenesis, TRPV4 is a potential target for anticancer therapy.
Collapse
Affiliation(s)
- Suyun Yu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Shuai Huang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Yushi Ding
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Wei Wang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Aiyun Wang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, P. R. China
| | - Yin Lu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, P. R. China.
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing, P. R. China.
| |
Collapse
|
25
|
Gilchrist CL, Leddy HA, Kaye L, Case ND, Rothenberg KE, Little D, Liedtke W, Hoffman BD, Guilak F. TRPV4-mediated calcium signaling in mesenchymal stem cells regulates aligned collagen matrix formation and vinculin tension. Proc Natl Acad Sci U S A 2019; 116:1992-7. [PMID: 30674675 DOI: 10.1073/pnas.1811095116] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Microarchitectural cues drive aligned fibrillar collagen deposition in vivo and in biomaterial scaffolds, but the cell-signaling events that underlie this process are not well understood. Utilizing a multicellular patterning model system that allows for observation of intracellular signaling events during collagen matrix assembly, we investigated the role of calcium (Ca2+) signaling in human mesenchymal stem cells (MSCs) during this process. We observed spontaneous Ca2+ oscillations in MSCs during fibrillar collagen assembly, and hypothesized that the transient receptor potential vanilloid 4 (TRPV4) ion channel, a mechanosensitive Ca2+-permeable channel, may regulate this signaling. Inhibition of TRPV4 nearly abolished Ca2+ signaling at initial stages of collagen matrix assembly, while at later times had reduced but significant effects. Importantly, blocking TRPV4 activity dramatically reduced aligned collagen fibril assembly; conversely, activating TRPV4 accelerated aligned collagen formation. TRPV4-dependent Ca2+ oscillations were found to be independent of pattern shape or subpattern cell location, suggesting this signaling mechanism is necessary for aligned collagen formation but not sufficient in the absence of physical (microarchitectural) cues that force multicellular alignment. As cell-generated mechanical forces are known to be critical to the matrix assembly process, we examined the role of TRPV4-mediated Ca2+ signaling in force generated across the load-bearing focal adhesion protein vinculin within MSCs using an FRET-based tension sensor. Inhibiting TRPV4 decreased tensile force across vinculin, whereas TRPV4 activation caused a dynamic unloading and reloading of vinculin. Together, these findings suggest TRPV4 activity regulates forces at cell-matrix adhesions and is critical to aligned collagen matrix assembly by MSCs.
Collapse
|
26
|
Graversen L, Haagerup A, Andersen BN, Petersen KK, Gjørup V, Gudmundsdottir G, Vogel I, Gregersen PA. Novel TRPV4 variant causes a severe form of metatropic dysplasia. Clin Case Rep 2018; 6:1774-1778. [PMID: 30214761 PMCID: PMC6132144 DOI: 10.1002/ccr3.1598] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 08/11/2017] [Revised: 04/06/2018] [Accepted: 04/12/2018] [Indexed: 01/19/2023] Open
Abstract
We present a girl born with a frontal bossing, short neck, bell-shaped thorax, short limbs with prominent joints, and a tail-like coccygeal appendage. Genetic screening of TRPV4 identified a novel de novo heterozygous missense variant. We believe the variant causes the severe form of metatropic dysplasia in this patient.
Collapse
Affiliation(s)
- Lise Graversen
- Pediatrics and Adolescent MedicineCentre for Rare DiseasesAarhus University HospitalAarhusDenmark
- Department of Clinical GeneticsAarhus University HospitalAarhusDenmark
| | - Annette Haagerup
- NIDO|danmarkWest Danish HospitalHerningDenmark
- Institute of Clinical MedicineAarhus UniversityAarhusDenmark
| | - Brian N. Andersen
- Pediatrics and Adolescent MedicineCentre for Rare DiseasesAarhus University HospitalAarhusDenmark
| | | | - Vibike Gjørup
- Department of Gynaecology and ObstetricsAarhus University HospitalAarhusDenmark
| | | | - Ida Vogel
- Department of Clinical GeneticsAarhus University HospitalAarhusDenmark
| | - Pernille A. Gregersen
- Pediatrics and Adolescent MedicineCentre for Rare DiseasesAarhus University HospitalAarhusDenmark
- Department of Clinical GeneticsAarhus University HospitalAarhusDenmark
| |
Collapse
|
27
|
Corrigan MA, Johnson GP, Stavenschi E, Riffault M, Labour MN, Hoey DA. TRPV4-mediates oscillatory fluid shear mechanotransduction in mesenchymal stem cells in part via the primary cilium. Sci Rep 2018; 8:3824. [PMID: 29491434 PMCID: PMC5830574 DOI: 10.1038/s41598-018-22174-3] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 02/19/2018] [Indexed: 01/22/2023] Open
Abstract
Skeletal homeostasis requires the continued replenishment of the bone forming osteoblast from a mesenchymal stem cell (MSC) population, a process that has been shown to be mechanically regulated. However, the mechanisms by which a biophysical stimulus can induce a change in biochemical signaling, mechanotransduction, is poorly understood. As a precursor to loading-induced bone formation, deciphering the molecular mechanisms of MSC osteogenesis is a critical step in developing novel anabolic therapies. Therefore, in this study we characterize the expression of the mechanosensitive calcium channel Transient Receptor Potential subfamily V member 4 (TRPV4) in MSCs and demonstrate that TRPV4 localizes to areas of high strain, specifically the primary cilium. We demonstrate that TRPV4 is required for MSC mechanotransduction, mediating oscillatory fluid shear induced calcium signaling and early osteogenic gene expression. Furthermore, we demonstrate that TRPV4 can be activated pharmacologically eliciting a response that mirrors that seen with mechanical stimulation. Lastly, we show that TRPV4 localization to the primary cilium is functionally significant, with MSCs with defective primary cilia exhibiting an inhibited osteogenic response to TRPV4 activation. Collectively, this data demonstrates a novel mechanism of stem cell mechanotransduction, which can be targeted therapeutically, and further highlights the critical role of the primary cilium in MSC biology.
Collapse
Affiliation(s)
- Michele A Corrigan
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical, Aeronautical and Biomedical Engineering, University of Limerick, Limerick, Ireland
| | - Gillian P Johnson
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical, Aeronautical and Biomedical Engineering, University of Limerick, Limerick, Ireland
| | - Elena Stavenschi
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical, Aeronautical and Biomedical Engineering, University of Limerick, Limerick, Ireland
| | - Mathieu Riffault
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, 2, Ireland
- Advanced Materials and Bioengineering Research Centre, Trinity College Dublin & RCSI, Dublin, 2, Ireland
| | - Marie-Noelle Labour
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, 2, Ireland
- Department of Mechanical, Aeronautical and Biomedical Engineering, University of Limerick, Limerick, Ireland
| | - David A Hoey
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, 2, Ireland.
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, 2, Ireland.
- Department of Mechanical, Aeronautical and Biomedical Engineering, University of Limerick, Limerick, Ireland.
- Advanced Materials and Bioengineering Research Centre, Trinity College Dublin & RCSI, Dublin, 2, Ireland.
| |
Collapse
|
28
|
Bieganski T, Beighton P, Lukaszewski M, Bik K, Kuszel L, Wasilewska E, Kozlowski K, Czarny-Ratajczak M. SMD Kozlowski type caused by p.Arg594His substitution in TRPV4 reveals abnormal ossification and notochordal remnants in discs and vertebrae. Eur J Med Genet 2017; 60:509-516. [PMID: 28687525 DOI: 10.1016/j.ejmg.2017.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 06/09/2017] [Accepted: 07/03/2017] [Indexed: 10/19/2022]
Abstract
Spondylometaphyseal dysplasia Kozlowski type (SMDK) is a monogenic disorder within the TRPV4 dysplasia spectrum and has characteristic spinal and metaphyseal changes. We report skeletal MR imaging in a two-year-old patient who manifested typical clinical and radiographic features of SMDK. The diagnosis was confirmed by molecular analysis which revealed a mutation NM_021625.4:c.1781G > A - p.(Arg594His) in exon 11 of the TRPV4 gene. We have documented abnormalities in endochondral formation of the long and short tubular bones as well as round bones of the wrists and feet. The vertebral bodies had increased thickness of hyaline cartilage which enveloped ossification centers. The vertebrae and discs also had abnormalities in size, shape and structure. These anomalies were most likely the consequence of notochordal remnants presence within the intervertebral discs and in the vertebral bodies. The advantages of MR imaging in bone dysplasias caused by TRPV4 mutations are emphasized in this article.
Collapse
Affiliation(s)
- Tadeusz Bieganski
- Department of Diagnostic Imaging, Polish Mother(')s Memorial Hospital - Research Institute, Lodz, Poland
| | - Peter Beighton
- Division of Human Genetics, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Maciej Lukaszewski
- Department of Diagnostic Imaging, Polish Mother(')s Memorial Hospital - Research Institute, Lodz, Poland
| | - Krzysztof Bik
- Department of Orthopaedics, Polish Mother(')s Memorial Hospital - Research Institute, Lodz, Poland
| | - Lukasz Kuszel
- Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - Ewa Wasilewska
- Department of Radiology, Children's Hospital, New Orleans, USA
| | - Kazimierz Kozlowski
- Department of Medical Imaging, The Children's Hospital at Westmead, Sydney, Australia
| | - Malwina Czarny-Ratajczak
- Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland; Department of Medicine, Center for Aging, Tulane University, School of Medicine, New Orleans, LA, USA.
| |
Collapse
|
29
|
Hu K, Sun H, Gui B, Sui C. TRPV4 functions in flow shear stress induced early osteogenic differentiation of human bone marrow mesenchymal stem cells. Biomed Pharmacother 2017; 91:841-848. [DOI: 10.1016/j.biopha.2017.04.094] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Revised: 04/12/2017] [Accepted: 04/20/2017] [Indexed: 12/25/2022] Open
|
30
|
Lee WH, Choong LY, Jin TH, Mon NN, Chong S, Liew CS, Putti T, Lu SY, Harteneck C, Lim YP. TRPV4 plays a role in breast cancer cell migration via Ca 2+-dependent activation of AKT and downregulation of E-cadherin cell cortex protein. Oncogenesis 2017; 6:e338. [PMID: 28530703 DOI: 10.1038/oncsis.2017.39] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 03/26/2017] [Accepted: 04/05/2017] [Indexed: 12/31/2022] Open
Abstract
TRPV4 belongs to the 'Transient Receptor Potential' (TRP) superfamily. It has been identified to profoundly affect a variety of physiological processes, including nociception, heat sensation and inflammation. Unlike other TRP superfamily channels, its role in cancers are unknown until recently when we reported TRPV4 to be required for cancer cell softness that may promote breast cancer cell extravasation and metastasis. Here, we elucidated the molecular mechanisms mediated by TRPV4 in the metastatic breast cancer cells. TRPV4-mediated signaling was demonstrated to involve Ca2+-dependent activation of AKT and downregulation of E-cadherin expression, which was abolished upon TRPV4 silencing. Functionally, TRPV4-enhanced breast caner cell transendothelial migration requires AKT activity while a combination of transcriptional and post-translational regulation contributed to the TRPV4-mediated E-cadherin downregulation. Finally, mass spectrometry analysis revealed that TRPV4 is required for the expression of a network of secreted proteins involved in extracellular matrix remodeling. In conclusion, TRPV4 may regulate breast cancer metastasis by regulating cell softness through the Ca2+-dependent AKT-E-cadherin signaling axis and regulation of the expression of extracellular proteins.
Collapse
|
31
|
O'Conor CJ, Ramalingam S, Zelenski NA, Benefield HC, Rigo I, Little D, Wu CL, Chen D, Liedtke W, McNulty AL, Guilak F. Cartilage-Specific Knockout of the Mechanosensory Ion Channel TRPV4 Decreases Age-Related Osteoarthritis. Sci Rep 2016; 6:29053. [PMID: 27388701 PMCID: PMC4937413 DOI: 10.1038/srep29053] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 06/14/2016] [Indexed: 12/23/2022] Open
Abstract
Osteoarthritis (OA) is a progressive degenerative disease of articular cartilage and surrounding tissues, and is associated with both advanced age and joint injury. Biomechanical factors play a critical role in the onset and progression of OA, yet the mechanisms through which physiologic or pathologic mechanical signals are transduced into a cellular response are not well understood. Defining the role of mechanosensory pathways in cartilage during OA pathogenesis may yield novel strategies or targets for the treatment of OA. The transient receptor potential vanilloid 4 (TRPV4) ion channel transduces mechanical loading of articular cartilage via the generation of intracellular calcium ion transients. Using tissue-specific, inducible Trpv4 gene-targeted mice, we demonstrate that loss of TRPV4-mediated cartilage mechanotransduction in adulthood reduces the severity of aging-associated OA. However, loss of chondrocyte TRPV4 did not prevent OA development following destabilization of the medial meniscus (DMM). These results highlight potentially distinct roles of TRPV4-mediated cartilage mechanotransduction in age-related and post-traumatic OA, and point to a novel disease-modifying strategy to therapeutically target the TRPV4-mediated mechanotransduction pathway for the treatment of aging-associated OA.
Collapse
Affiliation(s)
- Christopher J O'Conor
- Department of Pathology &Immunology, Washington University in St. Louis, Missouri, 63110, USA.,UNC/NCSU Joint Department of Biomedical Engineering, UNC School of Medicine, Chapel Hill, NC 27599, USA.,Department of Orthopaedic Surgery, Duke University Medical Center, Durham NC 27710, USA
| | | | - Nicole A Zelenski
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham NC 27710, USA
| | - Halei C Benefield
- UNC/NCSU Joint Department of Biomedical Engineering, UNC School of Medicine, Chapel Hill, NC 27599, USA.,Department of Orthopaedic Surgery, Duke University Medical Center, Durham NC 27710, USA
| | - Isaura Rigo
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham NC 27710, USA
| | - Dianne Little
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham NC 27710, USA
| | - Chia-Lung Wu
- Department of Orthopaedic Surgery, Washington University in St. Louis, Missouri, 63110, USA.,Shriners Hospitals for Children - St. Louis, St. Louis, Missouri 63110, USA
| | - Di Chen
- Department of Biochemistry, Rush University, Chicago, IL, 60612, USA
| | - Wolfgang Liedtke
- Department of Neurology and Neurobiology, Duke University Medical Center, Durham NC 27710, USA
| | - Amy L McNulty
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham NC 27710, USA
| | - Farshid Guilak
- Department of Orthopaedic Surgery, Washington University in St. Louis, Missouri, 63110, USA.,Shriners Hospitals for Children - St. Louis, St. Louis, Missouri 63110, USA.,UNC/NCSU Joint Department of Biomedical Engineering, UNC School of Medicine, Chapel Hill, NC 27599, USA
| |
Collapse
|
32
|
Shibasaki K, Sugio S, Takao K, Yamanaka A, Miyakawa T, Tominaga M, Ishizaki Y. TRPV4 activation at the physiological temperature is a critical determinant of neuronal excitability and behavior. Pflugers Arch 2015; 467:2495-507. [PMID: 26250433 DOI: 10.1007/s00424-015-1726-0] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 07/26/2015] [Accepted: 07/28/2015] [Indexed: 11/25/2022]
Abstract
For homeothermic animals, constant body temperature is an important determinant of brain function. It is well established that changes in brain temperature dynamically influence hippocampal activity. We previously reported that the thermosensor TRPV4 (activated above 34 °C) is activated at the physiological temperature in hippocampal neurons and controls neuronal excitability in vitro. Here, we examined if TRPV4 regulates neuronal excitability through its activation at the physiological temperature in vivo. We found that TRPV4-deficient (TRPV4KO) mice exhibit reduced depression-like and social behaviors compared to wild-type (WT) mice, and the number of c-fos positive cells in the dentate gyrus was significantly reduced upon the depression-like behaviors. We measured resting membrane potentials (RMPs) in the hippocampal granule cells from slice preparations at 35 °C and found that TRPV4-positive neurons significantly depolarized the RMPs through TRPV4 activation at the physiological temperature. The depolarization increased the spike numbers depending on the enhancement of TRPV4 activation. We also found that theta-frequency electroencephalogram (EEG) activities in TRPV4KO mice during wake periods were significantly reduced compared with those in WT mice. Taken together, we report for the first time that TRPV4 activation at the physiological temperature is important to regulate neuronal excitability and behaviors in mammals.
Collapse
Affiliation(s)
- Koji Shibasaki
- Department of Molecular and Cellular Neurobiology, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan.
| | - Shouta Sugio
- Department of Molecular and Cellular Neurobiology, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Keizo Takao
- Section of Behavior Patterns, Maebashi, Japan
- Japan Science and Technology Agency, Core Research for Evolutional Science and Technology (CREST), Tokyo, Japan
| | - Akihiro Yamanaka
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, 464-8601, Japan
| | - Tsuyoshi Miyakawa
- Section of Behavior Patterns, Maebashi, Japan
- Japan Science and Technology Agency, Core Research for Evolutional Science and Technology (CREST), Tokyo, Japan
- Division of Systems Medicine, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, 470-7792, Japan
| | - Makoto Tominaga
- Division of Cell Signaling, National Institute for Physiological Sciences, Okazaki, Japan
- Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Okazaki, 444-8585, Japan
- Department of Physiological Sciences, The Graduate University for Advanced Studies, Okazaki, 444-8585, Japan
| | - Yasuki Ishizaki
- Department of Molecular and Cellular Neurobiology, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| |
Collapse
|
33
|
Somogyi CS, Matta C, Foldvari Z, Juhász T, Katona É, Takács ÁR, Hajdú T, Dobrosi N, Gergely P, Zákány R. Polymodal Transient Receptor Potential Vanilloid (TRPV) Ion Channels in Chondrogenic Cells. Int J Mol Sci 2015; 16:18412-38. [PMID: 26262612 DOI: 10.3390/ijms160818412] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 07/03/2015] [Accepted: 07/07/2015] [Indexed: 12/17/2022] Open
Abstract
Mature and developing chondrocytes exist in a microenvironment where mechanical load, changes of temperature, osmolarity and acidic pH may influence cellular metabolism. Polymodal Transient Receptor Potential Vanilloid (TRPV) receptors are environmental sensors mediating responses through activation of linked intracellular signalling pathways. In chondrogenic high density cultures established from limb buds of chicken and mouse embryos, we identified TRPV1, TRPV2, TRPV3, TRPV4 and TRPV6 mRNA expression with RT-PCR. In both cultures, a switch in the expression pattern of TRPVs was observed during cartilage formation. The inhibition of TRPVs with the non-selective calcium channel blocker ruthenium red diminished chondrogenesis and caused significant inhibition of proliferation. Incubating cell cultures at 41 °C elevated the expression of TRPV1, and increased cartilage matrix production. When chondrogenic cells were exposed to mechanical load at the time of their differentiation into matrix producing chondrocytes, we detected increased mRNA levels of TRPV3. Our results demonstrate that developing chondrocytes express a full palette of TRPV channels and the switch in the expression pattern suggests differentiation stage-dependent roles of TRPVs during cartilage formation. As TRPV1 and TRPV3 expression was altered by thermal and mechanical stimuli, respectively, these are candidate channels that contribute to the transduction of environmental stimuli in chondrogenic cells.
Collapse
|
34
|
Kar SK, Bansal S, Kumar D. An extremely rare association of dyggve-melchior-clausen syndrome with mania: coincidence or comorbidity. Indian J Psychol Med 2015; 37:226-9. [PMID: 25969613 PMCID: PMC4418260 DOI: 10.4103/0253-7176.155644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Dyggve-Melchior-Clausen syndrome is a progressive spondylo-epi-metaphyseal dysplasia associated with mental retardation, characterized by a triad of skeletal deformities (short trunk dwarfism, scoliosis, microcephaly, and limb deformities), facial dysmorphism, and intellectual disability. It an extremely rare condition. Till now, there was no evidence of association of Dyggve-Melchior-Clausen Syndrome with mood disorder. This case report highlights the extremely rare association of Dyggve-Melchior-Clausen syndrome with bipolar affective disorder. The patient had responded well to the combination of mood stabilizer and antipsychotics (sodium valproate and risperidone). To the best of author's knowledge, this is the first case report depicting such association. Both Dyggve-Melchior-Clausen syndrome and bipolar affective disorder are associated with 18q chromosome. This background information raises the possibility of co-morbid association of two disorders rather than a chance association due to genetic linkage.
Collapse
Affiliation(s)
- Sujita Kumar Kar
- Department of Psychiatry, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Shwetank Bansal
- Department of Psychiatry, Institute of Human Behavior and Allied Sciences (IHBAS), Delhi, India
| | - Deepak Kumar
- Department of Psychiatry, Institute of Human Behavior and Allied Sciences (IHBAS), Delhi, India
| |
Collapse
|
35
|
Shin SH, Lee EJ, Chun J, Hyun S, Kang SS. Phosphorylation on TRPV4 Serine 824 Regulates Interaction with STIM1. Open Biochem J 2015; 9:24-33. [PMID: 25972993 PMCID: PMC4412957 DOI: 10.2174/1874091x01509010024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 07/29/2014] [Revised: 12/12/2014] [Accepted: 12/14/2014] [Indexed: 12/12/2022] Open
Abstract
The TRPV4 cation channel, a member of the TRP vanilloid subfamily, is expressed in a broad range of tissues where it participates in the generation of a Ca2+ signal and/or depolarization of membrane potential. Here, we identified stromal interaction molecule 1 precursor (STIM1) as an auxiliary protein of this epithelial Ca2+channel using confocal microscopy analysis and GST pull-down assay. The STIM1 protein associates specifically with the C-terminal tail of TRPV4 to form a complex. In previous reports, we demonstrated that the serine824 residue of TRPV4 is one of the target phosphorylation sites of serum/glucocorticoid regulated kinase 1 (SGK1). In this report we further identified the role of serine 824 phosphorylation. The TRPV4 mutant S824D (not S824A) exhibited a diminished capacity to bind STIM1. Using GST pull-down and co-immunoprecipitation assays, we demonstrated that STIM1 is part of the TRPV4 protein complex. Our observations clearly suggest that the formation of a complex between TRPV4 and STIM1 and its plasma membrane localization are regulated through phosphorylation of serine824 of TRPV4, and that the STIM1-TRPV4 complex plays crucial roles in routing TRPV4 to the plasma membrane from the endoplasmic reticulum and in maintaining its function.
Collapse
Affiliation(s)
- Sung H Shin
- Department of Biology Education, Chungbuk National University, 410 Seongbong Road, Heungdok-gu, Cheongju,Chungbuk, 361-763, Republic of Korea
| | - Eun J Lee
- Department of Biology Education, Chungbuk National University, 410 Seongbong Road, Heungdok-gu, Cheongju,Chungbuk, 361-763, Republic of Korea
| | - Jaesun Chun
- Department of Biology Education, Korea National University of Education, Chongwon,Chungbuk 363-791, Republic of Korea
| | - Sunghee Hyun
- Department of Biomedical Laboratory Science, Eulji University, Daejeon 301-832, Republic of Korea
| | - Sang S Kang
- Department of Biology Education, Chungbuk National University, 410 Seongbong Road, Heungdok-gu, Cheongju,Chungbuk, 361-763, Republic of Korea
| |
Collapse
|
36
|
Abstract
Environmental temperature can have a surprising impact on extremity growth in homeotherms, but the underlying mechanisms have remained elusive for over a century. Limbs of animals raised at warm ambient temperature are significantly and permanently longer than those of littermates housed at cooler temperature. These remarkably consistent lab results closely resemble the ecogeographical tenet described by Allen's "extremity size rule," that appendage length correlates with temperature and latitude. This phenotypic growth plasticity could have adaptive significance for thermal physiology. Shortened extremities help retain body heat in cold environments by decreasing surface area for potential heat loss. Homeotherms have evolved complex mechanisms to maintain tightly regulated internal temperatures in challenging environments, including "facultative extremity heterothermy" in which limb temperatures can parallel ambient. Environmental modulation of tissue temperature can have direct and immediate consequences on cell proliferation, metabolism, matrix production, and mineralization in cartilage. Temperature can also indirectly influence cartilage growth by modulating circulating levels and delivery routes of essential hormones and paracrine regulators. Using an integrated approach, this article synthesizes classic studies with new data that shed light on the basis and significance of this enigmatic growth phenomenon and its relevance for treating human bone elongation disorders. Discussion centers on the vasculature as a gateway to understanding the complex interconnection between direct (local) and indirect (systemic) mechanisms of temperature-enhanced bone lengthening. Recent advances in imaging modalities that enable the dynamic study of cartilage growth plates in vivo will be key to elucidating fundamental physiological mechanisms of long bone growth regulation.
Collapse
Affiliation(s)
- Maria A Serrat
- Department of Anatomy and Pathology, Joan C. Edwards School of Medicine, Marshall University, Huntington, West Virginia
| |
Collapse
|
37
|
O'Conor CJ, Leddy HA, Benefield HC, Liedtke WB, Guilak F. TRPV4-mediated mechanotransduction regulates the metabolic response of chondrocytes to dynamic loading. Proc Natl Acad Sci U S A 2014; 111:1316-21. [PMID: 24474754 DOI: 10.1073/pnas.1319569111] [Citation(s) in RCA: 298] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Mechanical loading of joints plays a critical role in maintaining the health and function of articular cartilage. The mechanism(s) of chondrocyte mechanotransduction are not fully understood, but could provide important insights into new physical or pharmacologic therapies for joint diseases. Transient receptor potential vanilloid 4 (TRPV4), a Ca(2+)-permeable osmomechano-TRP channel, is highly expressed in articular chondrocytes, and loss of TRPV4 function is associated with joint arthropathy and osteoarthritis. The goal of this study was to examine the hypothesis that TRPV4 transduces dynamic compressive loading in articular chondrocytes. We first confirmed the presence of physically induced, TRPV4-dependent intracellular Ca(2+) signaling in agarose-embedded chondrocytes, and then used this model system to study the role of TRPV4 in regulating the response of chondrocytes to dynamic compression. Inhibition of TRPV4 during dynamic loading prevented acute, mechanically mediated regulation of proanabolic and anticatabolic genes, and furthermore, blocked the loading-induced enhancement of matrix accumulation and mechanical properties. Furthermore, chemical activation of TRPV4 by the agonist GSK1016790A in the absence of mechanical loading similarly enhanced anabolic and suppressed catabolic gene expression, and potently increased matrix biosynthesis and construct mechanical properties. These findings support the hypothesis that TRPV4-mediated Ca(2+) signaling plays a central role in the transduction of mechanical signals to support cartilage extracellular matrix maintenance and joint health. Moreover, these insights raise the possibility of therapeutically targeting TRPV4-mediated mechanotransduction for the treatment of diseases such as osteoarthritis, as well as to enhance matrix formation and functional properties of tissue-engineered cartilage as an alternative to bioreactor-based mechanical stimulation.
Collapse
|
38
|
Teng J, Loukin S, Zhou X, Kung C. Yeast luminometric and Xenopus oocyte electrophysiological examinations of the molecular mechanosensitivity of TRPV4. J Vis Exp 2013:50816. [PMID: 24637628 PMCID: PMC4396860 DOI: 10.3791/50816] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
TRPV4 (Transient Receptor Potentials, vanilloid family, type 4) is widely expressed in vertebrate tissues and is activated by several stimuli, including by mechanical forces. Certain TRPV4 mutations cause complex hereditary bone or neuronal pathologies in human. Wild-type or mutant TRPV4 transgenes are commonly expressed in cultured mammalian cells and examined by Fura-2 fluorometry and by electrodes. In terms of the mechanism of mechanosensitivity and the molecular bases of the diseases, the current literature is confusing and controversial. To complement existing methods, we describe two additional methods to examine the molecular properties of TRPV4. (1) Rat TRPV4 and an aequorin transgene are transformed into budding yeast. A hypo-osmtic shock of the transformant population yields a luminometric signal due to the combination of aequorin with Ca(2+), released through the TRPV4 channel. Here TRPV4 is isolated from its usual mammalian partner proteins and reveals its own mechanosensitivity. (2) cRNA of TRPV4 is injected into Xenopus oocytes. After a suitable period of incubation, the macroscopic TRPV4 current is examined with a two-electrode voltage clamp. The current rise upon removal of inert osmoticum from the oocyte bath is indicative of mechanosensitivity. The microAmpere (10(-6) to 10(-4) A) currents from oocytes are much larger than the subnano- to nanoAmpere (10(-10) to 10(-9) A) currents from cultured cells, yielding clearer quantifications and more confident assessments. Microscopic currents reflecting the activities of individual channel proteins can also be directly registered under a patch clamp, in on-cell or excised mode. The same oocyte provides multiple patch samples, allowing better data replication. Suctions applied to the patches can activate TRPV4 to directly assess mechanosensitivity. These methods should also be useful in the study of other types of TRP channels.
Collapse
Affiliation(s)
- Jinfeng Teng
- Laboratory of Cell and Molecular Biology, University of Wisconsin - Madison
| | - Stephen Loukin
- Laboratory of Cell and Molecular Biology, University of Wisconsin - Madison
| | - Xinliang Zhou
- Laboratory of Cell and Molecular Biology, University of Wisconsin - Madison
| | - Ching Kung
- Laboratory of Cell and Molecular Biology, University of Wisconsin - Madison; Department of Genetics, University of Wisconsin - Madison;
| |
Collapse
|
39
|
Klausen TK, Janssens A, Prenen J, Owsianik G, Hoffmann EK, Pedersen SF, Nilius B. Single point mutations of aromatic residues in transmembrane helices 5 and -6 differentially affect TRPV4 activation by 4α-PDD and hypotonicity: implications for the role of the pore region in regulating TRPV4 activity. Cell Calcium 2013; 55:38-47. [PMID: 24342753 DOI: 10.1016/j.ceca.2013.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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: 11/06/2013] [Accepted: 11/08/2013] [Indexed: 12/20/2022]
Abstract
The importance of the TRPV4 channel for human physiology has been highlighted in recent years with the identification of an increasing number of hereditary diseases associated with mutations of this channel. However, the functional understanding of TRPV4 associated pathologies remains a puzzle due to incomplete understanding of the polymodal regulation of TRPV4 channels and lack of insight into the structure-function relationship of the channel. In this work, we identified a series of highly conserved aromatic residues in transmembrane (TM) helices 5-6 with profound importance for TRPV4 activity. Substituting F617, Y621 or F624 in TM5 with leucine reduced channel sensitivity to the agonist 4α-PDD and heat, yet two of these mutants - F617L and Y621L - showed increased activation in response to cell swelling. In TM6, a Y702L mutation significantly reduced sensitivity to all of the above stimuli. In conclusion, we have identified residues in TM5-6 which differentially affect heat and agonist activation, and we have demonstrated distinct activation pathways for 4α-PDD and osmolarity.
Collapse
Affiliation(s)
- Thomas Kjær Klausen
- KU Leuven, Department of Cellular and Molecular Medicine, Laboratory Ion Channel Research, Campus Gasthuisberg, Herestraat 49, Bus 802, Leuven, Belgium; Department of Biology, The August Krogh Building, Universitetsparken 13, DK-2100 Copenhagen Ø, Denmark.
| | - Annelies Janssens
- KU Leuven, Department of Cellular and Molecular Medicine, Laboratory Ion Channel Research, Campus Gasthuisberg, Herestraat 49, Bus 802, Leuven, Belgium
| | - Jean Prenen
- KU Leuven, Department of Cellular and Molecular Medicine, Laboratory Ion Channel Research, Campus Gasthuisberg, Herestraat 49, Bus 802, Leuven, Belgium
| | - Grzegorz Owsianik
- KU Leuven, Department of Cellular and Molecular Medicine, Laboratory Ion Channel Research, Campus Gasthuisberg, Herestraat 49, Bus 802, Leuven, Belgium
| | - Else Kay Hoffmann
- Department of Biology, The August Krogh Building, Universitetsparken 13, DK-2100 Copenhagen Ø, Denmark
| | - Stine Falsig Pedersen
- Department of Biology, The August Krogh Building, Universitetsparken 13, DK-2100 Copenhagen Ø, Denmark
| | - Bernd Nilius
- KU Leuven, Department of Cellular and Molecular Medicine, Laboratory Ion Channel Research, Campus Gasthuisberg, Herestraat 49, Bus 802, Leuven, Belgium
| |
Collapse
|
40
|
Abstract
Hereditary channelopathies, that is, mutations in channel genes that alter channel function and are causal for the pathogenesis of the disease, have been described for several members of the transient receptor potential channel family. Mutations in the TRPV4 gene, encoding a polymodal Ca(2+) permeable channel, are causative for several human diseases, which affect the skeletal system and the peripheral nervous system, with highly variable phenotypes. In this review, we describe the phenotypes of TRPV4 channelopathies and overlapping symptoms. Putative mechanisms to explain the puzzle, and how mutations in the same region of the channel cause different diseases, are discussed and experimental approaches to tackle this surprising problem are suggested.
Collapse
Affiliation(s)
- Bernd Nilius
- KU Leuven, Department of Cellular & Molecular Medicine, Laboratory of Ion Channel Research, Campus Gasthuisberg, Leuven, Belgium.
| | | |
Collapse
|