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Jiao H, Li X, Li Y, Guo Y, Hu X, Sho T, Luo Y, Wang J, Cao H, Du W, Li D, Yu L. Localized, highly efficient secretion of signaling proteins by migrasomes. Cell Res 2024; 34:572-585. [PMID: 38918584 PMCID: PMC11291916 DOI: 10.1038/s41422-024-00992-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 06/11/2024] [Indexed: 06/27/2024] Open
Abstract
Migrasomes, enriched with signaling molecules such as chemokines, cytokines and angiogenic factors, play a pivotal role in the spatially defined delivery of these molecules, influencing critical physiological processes including organ morphogenesis and angiogenesis. The mechanism governing the accumulation of signaling molecules in migrasomes has been elusive. In this study, we show that secretory proteins, including signaling proteins, are transported into migrasomes by secretory carriers via both the constitutive and regulated secretion pathways. During cell migration, a substantial portion of these carriers is redirected to the rear of the cell and actively transported into migrasomes, driven by the actin-dependent motor protein Myosin-5a. Once at the migrasomes, these carriers fuse with the migrasome membrane through SNARE-mediated mechanisms. Inhibiting migrasome formation significantly reduces secretion, suggesting migrasomes as a principal secretion route in migrating cells. Our findings reveal a specialized, highly localized secretion paradigm in migrating cells, conceptually paralleling the targeted neurotransmitter release observed in neuronal systems.
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Affiliation(s)
- Haifeng Jiao
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China.
| | - Xiaopeng Li
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China
| | - Ying Li
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China
| | - Yuting Guo
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Xiaoyu Hu
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China
| | - Takami Sho
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China
| | - Yiqun Luo
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China
| | - Jinyu Wang
- SLSTU-Nikon Biological Imaging Center, Center of Biomedical Analysis, Tsinghua University, Beijing, China
| | - Huizhen Cao
- SLSTU-Nikon Biological Imaging Center, Center of Biomedical Analysis, Tsinghua University, Beijing, China
| | - Wanqing Du
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China
| | - Dong Li
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Li Yu
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China.
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2
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Hijaze E, Gildor T, Seidel R, Layous M, Winter M, Bertinetti L, Politi Y, Ben-Tabou de-Leon S. ROCK and the actomyosin network control biomineral growth and morphology during sea urchin skeletogenesis. eLife 2024; 12:RP89080. [PMID: 38573316 PMCID: PMC10994658 DOI: 10.7554/elife.89080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024] Open
Abstract
Biomineralization had apparently evolved independently in different phyla, using distinct minerals, organic scaffolds, and gene regulatory networks (GRNs). However, diverse eukaryotes from unicellular organisms, through echinoderms to vertebrates, use the actomyosin network during biomineralization. Specifically, the actomyosin remodeling protein, Rho-associated coiled-coil kinase (ROCK) regulates cell differentiation and gene expression in vertebrates' biomineralizing cells, yet, little is known on ROCK's role in invertebrates' biomineralization. Here, we reveal that ROCK controls the formation, growth, and morphology of the calcite spicules in the sea urchin larva. ROCK expression is elevated in the sea urchin skeletogenic cells downstream of the Vascular Endothelial Growth Factor (VEGF) signaling. ROCK inhibition leads to skeletal loss and disrupts skeletogenic gene expression. ROCK inhibition after spicule formation reduces the spicule elongation rate and induces ectopic spicule branching. Similar skeletogenic phenotypes are observed when ROCK is inhibited in a skeletogenic cell culture, indicating that these phenotypes are due to ROCK activity specifically in the skeletogenic cells. Reduced skeletal growth and enhanced branching are also observed under direct perturbations of the actomyosin network. We propose that ROCK and the actomyosin machinery were employed independently, downstream of distinct GRNs, to regulate biomineral growth and morphology in Eukaryotes.
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Affiliation(s)
- Eman Hijaze
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of HaifaHaifaIsrael
| | - Tsvia Gildor
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of HaifaHaifaIsrael
| | - Ronald Seidel
- B CUBE Center for Molecular Bioengineering, Technische Universität DresdenDresdenGermany
| | - Majed Layous
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of HaifaHaifaIsrael
| | - Mark Winter
- Department of Electrical Engineering, Computer Science and Mathematics, Technische Universiteit DelftDelftNetherlands
| | - Luca Bertinetti
- B CUBE Center for Molecular Bioengineering, Technische Universität DresdenDresdenGermany
| | - Yael Politi
- B CUBE Center for Molecular Bioengineering, Technische Universität DresdenDresdenGermany
| | - Smadar Ben-Tabou de-Leon
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of HaifaHaifaIsrael
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3
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Garg N, Štibler UK, Eismann B, Mercker M, Bergheim BG, Linn A, Tuchscherer P, Engel U, Redl S, Marciniak-Czochra A, Holstein TW, Hess MW, Özbek S. Non-muscle myosin II drives critical steps of nematocyst morphogenesis. iScience 2023; 26:106291. [PMID: 36936784 PMCID: PMC10014300 DOI: 10.1016/j.isci.2023.106291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/04/2022] [Accepted: 02/20/2023] [Indexed: 03/02/2023] Open
Abstract
Nematocysts are generated by secretion of proteins into a post-Golgi compartment. They consist of a capsule that elongates into a long tube, which is coiled inside the capsule matrix and expelled during its nano-second discharge deployed for prey capture. The driving force for discharge is an extreme osmotic pressure of 150 bar. The complex processes of tube elongation and invagination under these biomechanical constraints have so far been elusive. Here, we show that a non-muscle myosin II homolog (HyNMII) is essential for nematocyst formation in Hydra. In early nematocysts, HyNMII assembles to a collar around the neck of the protruding tube. HyNMII then facilitates tube outgrowth by compressing it along the longitudinal axis as evidenced by inhibitor treatment and genetic knockdown. In addition, live imaging of a NOWA::NOWA-GFP transgenic line, which re-defined NOWA as a tube component facilitating invagination, allowed us to analyze the impact of HyNMII on tube maturation.
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Affiliation(s)
- Niharika Garg
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Urška Knez Štibler
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Björn Eismann
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Moritz Mercker
- Institute for Applied Mathematics, Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Bruno Gideon Bergheim
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Anna Linn
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Patrizia Tuchscherer
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Ulrike Engel
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
- Nikon Imaging Center at the University of Heidelberg, Bioquant, Heidelberg University, 69120 Heidelberg, Germany
| | - Stefan Redl
- Institute of Neuroanatomy, Medical University of Innsbruck, Müllerstrasse 59, 6020 Innsbruck, Austria
- Institute of Zoology, University of Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria
| | - Anna Marciniak-Czochra
- Institute for Applied Mathematics, Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Thomas W. Holstein
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Michael W. Hess
- Institute of Histology and Embryology, Medical University of Innsbruck, Müllerstrasse 59, 6020 Innsbruck, Austria
| | - Suat Özbek
- University of Heidelberg, Centre for Organismal Studies, Department of Molecular Evolution and Genomics, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
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4
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Apical-basal polarity and the control of epithelial form and function. Nat Rev Mol Cell Biol 2022; 23:559-577. [PMID: 35440694 DOI: 10.1038/s41580-022-00465-y] [Citation(s) in RCA: 89] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2022] [Indexed: 02/02/2023]
Abstract
Epithelial cells are the most common cell type in all animals, forming the sheets and tubes that compose most organs and tissues. Apical-basal polarity is essential for epithelial cell form and function, as it determines the localization of the adhesion molecules that hold the cells together laterally and the occluding junctions that act as barriers to paracellular diffusion. Polarity must also target the secretion of specific cargoes to the apical, lateral or basal membranes and organize the cytoskeleton and internal architecture of the cell. Apical-basal polarity in many cells is established by conserved polarity factors that define the apical (Crumbs, Stardust/PALS1, aPKC, PAR-6 and CDC42), junctional (PAR-3) and lateral (Scribble, DLG, LGL, Yurt and RhoGAP19D) domains, although recent evidence indicates that not all epithelia polarize by the same mechanism. Research has begun to reveal the dynamic interactions between polarity factors and how they contribute to polarity establishment and maintenance. Elucidating these mechanisms is essential to better understand the roles of apical-basal polarity in morphogenesis and how defects in polarity contribute to diseases such as cancer.
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5
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Doran MH, Lehman W. The Central Role of the F-Actin Surface in Myosin Force Generation. BIOLOGY 2021; 10:1221. [PMID: 34943138 PMCID: PMC8698748 DOI: 10.3390/biology10121221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/17/2021] [Accepted: 11/19/2021] [Indexed: 11/17/2022]
Abstract
Actin is one of the most abundant and versatile proteins in eukaryotic cells. As discussed in many contributions to this Special Issue, its transition from a monomeric G-actin to a filamentous F-actin form plays a critical role in a variety of cellular processes, including control of cell shape and cell motility. Once polymerized from G-actin, F-actin forms the central core of muscle-thin filaments and acts as molecular tracks for myosin-based motor activity. The ATP-dependent cross-bridge cycle of myosin attachment and detachment drives the sliding of myosin thick filaments past thin filaments in muscle and the translocation of cargo in somatic cells. The variation in actin function is dependent on the variation in muscle and non-muscle myosin isoform behavior as well as interactions with a plethora of additional actin-binding proteins. Extensive work has been devoted to defining the kinetics of actin-based force generation powered by the ATPase activity of myosin. In addition, over the past decade, cryo-electron microscopy has revealed the atomic-evel details of the binding of myosin isoforms on the F-actin surface. Most accounts of the structural interactions between myosin and actin are described from the perspective of the myosin molecule. Here, we discuss myosin-binding to actin as viewed from the actin surface. We then describe conserved structural features of actin required for the binding of all or most myosin isoforms while also noting specific interactions unique to myosin isoforms.
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Affiliation(s)
- Matthew H. Doran
- Department of Physiology & Biophysics, Boston University School of Medicine, Boston, MA 02118, USA
| | - William Lehman
- Department of Physiology & Biophysics, Boston University School of Medicine, Boston, MA 02118, USA
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6
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Heggie A, Cerny O, Holden DW. SteC and the intracellular Salmonella-induced F-actin meshwork. Cell Microbiol 2021; 23:e13315. [PMID: 33534187 DOI: 10.1111/cmi.13315] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/11/2021] [Accepted: 01/22/2021] [Indexed: 12/15/2022]
Abstract
Salmonella enterica serovars infect a broad range of mammalian hosts including humans, causing both gastrointestinal and systemic diseases. Following uptake into host cells, bacteria replicate within vacuoles (Salmonella-containing vacuoles; SCVs). Clusters of SCVs are frequently associated with a meshwork of F-actin. This meshwork is dependent on the Salmonella pathogenicity island 2 encoded type III secretion system and its effector SteC. SteC contains a region with weak similarity to conserved subdomains of eukaryotic kinases and has kinase activity that is required for the formation of the F-actin meshwork. Several substrates of SteC have been identified. In this mini-review, we attempt to integrate these findings and propose a more unified model to explain SCV-associated F-actin: SteC (i) phosphorylates the actin sequestering protein Hsp27, which increases the local G-actin concentration (ii) binds to and phosphorylates formin family FMNL proteins, which enables actin polymerisation and (iii) phosphorylates MEK, resulting in activation of the MEK/ERK/MLCK/Myosin II pathway, leading to F-actin bundling. We also consider the possible physiological functions of SCV-associated F-actin and similar structures produced by other intracellular bacterial pathogens.
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Affiliation(s)
- Alison Heggie
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK
| | - Ondrej Cerny
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK
| | - David W Holden
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK
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7
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Guo Y, Wu Y, Shi J, Zhuang H, Ci L, Huang Q, Wan Z, Yang H, Zhang M, Tan Y, Sun R, Xu L, Wang Z, Shen R, Fei J. miR-29a/b1 Regulates the Luteinizing Hormone Secretion and Affects Mouse Ovulation. Front Endocrinol (Lausanne) 2021; 12:636220. [PMID: 34135859 PMCID: PMC8202074 DOI: 10.3389/fendo.2021.636220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 05/10/2021] [Indexed: 12/22/2022] Open
Abstract
miR-29a/b1 was reportedly involved in the regulation of the reproductive function in female mice, but the underlying molecular mechanisms are not clear. In this study, female mice lacking miR-29a/b1 showed a delay in vaginal opening, irregular estrous cycles, ovulation disorder and subfertility. The level of luteinizing hormone (LH) was significantly lower in plasma but higher in pituitary of mutant mice. However, egg development was normal in mutant mice and the ovulation disorder could be rescued by the superovulation treatment. These results suggested that the LH secretion was impaired in mutant mice. Further studies showed that deficiency of miR-29a/b1 in mice resulted in an abnormal expression of a number of proteins involved in vesicular transport and exocytosis in the pituitary, indicating the mutant mice had insufficient LH secretion. However, the detailed mechanism needs more research.
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Affiliation(s)
- Yang Guo
- School of Life Science and Technology, Tongji University, Shanghai, China
- Shanghai Lab, Animal Research Center, Shanghai, China
| | - Youbing Wu
- Shanghai Model Organisms, Shanghai, China
| | - Jiahao Shi
- School of Life Science and Technology, Tongji University, Shanghai, China
| | - Hua Zhuang
- Shanghai Model Organisms, Shanghai, China
| | - Lei Ci
- School of Life Science and Technology, Tongji University, Shanghai, China
- Shanghai Model Organisms, Shanghai, China
| | - Qin Huang
- Shanghai Model Organisms, Shanghai, China
| | - Zhipeng Wan
- School of Life Science and Technology, Tongji University, Shanghai, China
- Shanghai Model Organisms, Shanghai, China
| | - Hua Yang
- School of Life Science and Technology, Tongji University, Shanghai, China
| | - Mengjie Zhang
- School of Life Science and Technology, Tongji University, Shanghai, China
| | - Yutong Tan
- School of Life Science and Technology, Tongji University, Shanghai, China
| | - Ruilin Sun
- Shanghai Model Organisms, Shanghai, China
| | - Leon Xu
- School of Life Science and Technology, Tongji University, Shanghai, China
| | - Zhugang Wang
- Department of Medicine, Ruijin Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Ruling Shen
- School of Life Science and Technology, Tongji University, Shanghai, China
- Shanghai Lab, Animal Research Center, Shanghai, China
- *Correspondence: Jian Fei, ; Ruling Shen,
| | - Jian Fei
- School of Life Science and Technology, Tongji University, Shanghai, China
- Shanghai Model Organisms, Shanghai, China
- *Correspondence: Jian Fei, ; Ruling Shen,
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8
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Liebman C, McColloch A, Rabiei M, Bowling A, Cho M. Mechanics of the cell: Interaction mechanisms and mechanobiological models. CURRENT TOPICS IN MEMBRANES 2020; 86:143-184. [PMID: 33837692 DOI: 10.1016/bs.ctm.2020.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The importance of cell mechanics has long been recognized for the cell development and function. Biomechanics plays an important role in cell metabolism, regulation of mechanotransduction pathways and also modulation of nuclear response. The mechanical properties of the cell are likely determined by, among many others, the cytoskeleton elasticity, membrane tension and cell-substrate adhesion. This coordinated but complex mechanical interplay is required however, for the cell to respond to and influence in a reciprocal manner the chemical and mechanical signals from the extracellular matrix (ECM). In an effort to better and more fully understand the cell mechanics, the role of nuclear mechanics has emerged as an important contributor to the overall cellular mechanics. It is not too difficult to appreciate the physical connection between the nucleus and the cytoskeleton network that may be connected to the ECM through the cell membrane. Transmission of forces from ECM through this connection is essential for a wide range of cellular behaviors and functions such as cytoskeletal reorganization, nuclear movement, cell migration and differentiation. Unlike the cellular mechanics that can be measured using a number of biophysical techniques that were developed in the past few decades, it still remains a daunting challenge to probe the nuclear mechanics directly. In this paper, we therefore aim to provide informative description of the cell membrane and cytoskeleton mechanics, followed by unique computational modeling efforts to elucidate the nucleus-cytoskeleton coupling. Advances in our knowledge of complete cellular biomechanics and mechanotransduction may lead to clinical relevance and applications in mechano-diseases such as atherosclerosis, stem cell-based therapies, and the development of tissue engineered products.
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Affiliation(s)
- Caleb Liebman
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, United States
| | - Andrew McColloch
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, United States
| | - Manoochehr Rabiei
- Department of Mechanical and Aerospace Engineering, University of Texas at Arlington, Arlington, TX, United States
| | - Alan Bowling
- Department of Mechanical and Aerospace Engineering, University of Texas at Arlington, Arlington, TX, United States.
| | - Michael Cho
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, United States.
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9
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Liang X, Wu Z, Shen S, Niu Y, Guo Y, Liang J, Guo W. LINC01980 facilitates esophageal squamous cell carcinoma progression via regulation of miR-190a-5p/MYO5A pathway. Arch Biochem Biophys 2020; 686:108371. [PMID: 32325088 DOI: 10.1016/j.abb.2020.108371] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/30/2020] [Accepted: 04/08/2020] [Indexed: 12/14/2022]
Abstract
Understanding the role of Long non-coding RNAs (lncRNAs) in tumorigenesis in diverse human malignancies would helpful for targeted therapies, containing esophageal squamous cell carcinoma (ESCC). However, the specific role and molecular mechanisms of LINC01980 in ESCC remain unclarified. In this study, we investigated the expression level, function role, and molecular mechanisms of LINC01980 in esophageal cancer cells and ESCC tissues. The high expression of LINC01980 was detected in ESCC tissues and cells, and predicted poor prognosis. LINC01980 promoted the cell proliferation, migration, invasion ability and epithelial-mesenchymal transition (EMT) progress in ESCC cells. In addition, a negative correlation between LINC01980 and miR-190a-5p or miR-190a-5p and MYO5A was observed in ESCC. We found that miR-190a-5p could directly bind with the mRNA of LINC01980 and MYO5A, and it was detected low expression in ESCC. We further demonstrated that the downregulation of MYO5A caused by overexpressing miR-190a-5p was released via upregulation of LINC01980. Functionally, LINC01980 acted as a competitively endogenous RNA (ceRNA) to impact the expression of MYO5A by sponging miR-190a-5p in ESCC. Therefore, these findings suggest that LINC01980 may act as an oncogenic lncRNA in ESCC and LINC01980/miR-190a-5p/MYO5A pathway contributes to the development of ESCC.
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Affiliation(s)
- Xiaoliang Liang
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Zheng Wu
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Supeng Shen
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Yunfeng Niu
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Yanli Guo
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Jia Liang
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Wei Guo
- Laboratory of Pathology, Hebei Cancer Institute, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.
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10
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Jung W, Tabatabai AP, Thomas JJ, Tabei SMA, Murrell MP, Kim T. Dynamic motions of molecular motors in the actin cytoskeleton. Cytoskeleton (Hoboken) 2019; 76:517-531. [PMID: 31758841 DOI: 10.1002/cm.21582] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 11/14/2019] [Accepted: 11/19/2019] [Indexed: 12/23/2022]
Abstract
During intracellular transport, cellular cargos, such as organelles, vesicles, and proteins, are transported within cells. Intracellular transport plays an important role in diverse cellular functions. Molecular motors walking on the cytoskeleton facilitate active intracellular transport, which is more efficient than diffusion-based passive transport. Active transport driven by kinesin and dynein walking on microtubules has been studied well during recent decades. However, mechanisms of active transport occurring in disorganized actin networks via myosin motors remain elusive. To provide physiologically relevant insights, we probed motions of myosin motors in actin networks under various conditions using our well-established computational model that rigorously accounts for the mechanical and dynamical behaviors of the actin cytoskeleton. We demonstrated that myosin motions can be confined due to three different reasons in the absence of F-actin turnover. We verified mechanisms of motor stalling using in vitro reconstituted actomyosin networks. We also found that with F-actin turnover, motors consistently move for a long time without significant confinement. Our study sheds light on the importance of F-actin turnover for effective active transport in the actin cytoskeleton.
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Affiliation(s)
- Wonyeong Jung
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, Indiana
| | - A Pasha Tabatabai
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut.,Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut
| | - Jacob J Thomas
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, Indiana
| | - S M Ali Tabei
- Department of Physics, University of Northern Iowa, 215 Begeman Hall, Cedar Falls, Iowa
| | - Michael P Murrell
- Systems Biology Institute, Yale University, 850 West Campus Drive, West Haven, Connecticut.,Department of Biomedical Engineering, Yale University, 55 Prospect Street, New Haven, Connecticut.,Department of Physics, Yale University. 217 Prospect Street, New Haven, Connecticut
| | - Taeyoon Kim
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, Indiana
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11
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Shih-Wei W, Chih-Ling C, Kao YC, Martin R, Knölker HJ, Shiao MS, Chen CL. Pentabromopseudilin: a myosin V inhibitor suppresses TGF-β activity by recruiting the type II TGF-β receptor to lysosomal degradation. J Enzyme Inhib Med Chem 2018; 33:920-935. [PMID: 29768059 PMCID: PMC6009923 DOI: 10.1080/14756366.2018.1465416] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Pentabromopseudilin (PBrP) is a marine antibiotic isolated from the marine bacteria Pseudomonas bromoutilis and Alteromonas luteoviolaceus. PBrP exhibits antimicrobial, anti-tumour, and phytotoxic activities. In mammalian cells, PBrP is known to act as a reversible and allosteric inhibitor of myosin Va (MyoVa). In this study, we report that PBrP is a potent inhibitor of transforming growth factor-β (TGF-β) activity. PBrP inhibits TGF-β-stimulated Smad2/3 phosphorylation, plasminogen activator inhibitor-1 (PAI-1) protein production and blocks TGF-β-induced epithelial–mesenchymal transition in epithelial cells. PBrP inhibits TGF-β signalling by reducing the cell-surface expression of type II TGF-β receptor (TβRII) and promotes receptor degradation. Gene silencing approaches suggest that MyoVa plays a crucial role in PBrP-induced TβRII turnover and the subsequent reduction of TGF-β signalling. Because, TGF-β signalling is crucial in the regulation of diverse pathophysiological processes such as tissue fibrosis and cancer development, PBrP should be further explored for its therapeutic role in treating fibrotic diseases and cancer.
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Affiliation(s)
- Wang Shih-Wei
- a Department of Biological Sciences , National Sun Yat-sen University , Kaohsiung , Taiwan, ROC
| | - Chung Chih-Ling
- a Department of Biological Sciences , National Sun Yat-sen University , Kaohsiung , Taiwan, ROC
| | - Yu-Chen Kao
- a Department of Biological Sciences , National Sun Yat-sen University , Kaohsiung , Taiwan, ROC
| | - René Martin
- b Department of Chemistry , TU Dresden , Dresden , Germany
| | | | - Meng-Shin Shiao
- c Faculty of Medicine Ramathibodi Hospital , Mahidol University , Bangkok , Thailand
| | - Chun-Lin Chen
- a Department of Biological Sciences , National Sun Yat-sen University , Kaohsiung , Taiwan, ROC.,d Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University and Academia Sinica , Kaohsiung , Taiwan, ROC
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12
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Kee AJ, Chagan J, Chan JY, Bryce NS, Lucas CA, Zeng J, Hook J, Treutlein H, Laybutt DR, Stehn JR, Gunning PW, Hardeman EC. On-target action of anti-tropomyosin drugs regulates glucose metabolism. Sci Rep 2018; 8:4604. [PMID: 29545590 PMCID: PMC5854615 DOI: 10.1038/s41598-018-22946-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 03/01/2018] [Indexed: 01/09/2023] Open
Abstract
The development of novel small molecule inhibitors of the cancer-associated tropomyosin 3.1 (Tpm3.1) provides the ability to examine the metabolic function of specific actin filament populations. We have determined the ability of these anti-Tpm (ATM) compounds to regulate glucose metabolism in mice. Acute treatment (1 h) of wild-type (WT) mice with the compounds (TR100 and ATM1001) led to a decrease in glucose clearance due mainly to suppression of glucose-stimulated insulin secretion (GSIS) from the pancreatic islets. The impact of the drugs on GSIS was significantly less in Tpm3.1 knock out (KO) mice indicating that the drug action is on-target. Experiments in MIN6 β-cells indicated that the inhibition of GSIS by the drugs was due to disruption to the cortical actin cytoskeleton. The impact of the drugs on insulin-stimulated glucose uptake (ISGU) was also examined in skeletal muscle ex vivo. In the absence of drug, ISGU was decreased in KO compared to WT muscle, confirming a role of Tpm3.1 in glucose uptake. Both compounds suppressed ISGU in WT muscle, but in the KO muscle there was little impact of the drugs. Collectively, this data indicates that the ATM drugs affect glucose metabolism in vivo by inhibiting Tpm3.1's function with few off-target effects.
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Affiliation(s)
- Anthony J Kee
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Jayshan Chagan
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Jeng Yie Chan
- Garvan Institute of Medical Research, St Vincent's Hospital, UNSW Sydney, Sydney, NSW, Australia
| | - Nicole S Bryce
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Christine A Lucas
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Jun Zeng
- MedChemSoft Solutions, Level 3 Brandon Park Drive, Wheelers Hill, 3150, VIC, Australia
| | - Jeff Hook
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Herbert Treutlein
- Sanoosa Pty. Ltd., 35 Collins Street, Melbourne, 3000, VIC, Australia
| | - D Ross Laybutt
- Garvan Institute of Medical Research, St Vincent's Hospital, UNSW Sydney, Sydney, NSW, Australia
| | - Justine R Stehn
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
- Novogen Pty Ltd, 502/20 George St, Hornsby, NSW, 2077, Australia
| | - Peter W Gunning
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Edna C Hardeman
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia.
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13
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Abstract
The delivery of intracellular material within cells is crucial for maintaining normal function. Myosins transport a wide variety of cargo, ranging from vesicles to ribonuclear protein particles (RNPs), in plants, fungi, and metazoa. The properties of a given myosin transporter are adapted to move on different actin filament tracks, either on the disordered actin networks at the cell cortex or along highly organized actin bundles to distribute their cargo in a localized manner or move it across long distances in the cell. Transport is controlled by selective recruitment of the myosin to its cargo that also plays a role in activation of the motor.
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Affiliation(s)
- Margaret A Titus
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, Minnesota 55455
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14
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Houdusse A, Sweeney HL. How Myosin Generates Force on Actin Filaments. Trends Biochem Sci 2016; 41:989-997. [PMID: 27717739 DOI: 10.1016/j.tibs.2016.09.006] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/14/2016] [Accepted: 09/14/2016] [Indexed: 12/18/2022]
Abstract
How myosin interacts with actin to generate force is a subject of considerable controversy. The major debate centers on understanding at what point in force generation the inorganic phosphate is released with respect to the lever arm swing, or powerstroke. Resolving the controversy is essential for understanding how force is produced as well as the mechanisms underlying disease-causing mutations in myosin. Recent structural insights into the powerstroke have come from a high-resolution structure of myosin in a previously unseen state and from an electron cryomicroscopy (cryo-EM) 3D reconstruction of the actin-myosin-MgADP complex. Here, we argue that seemingly contradictory data from time-resolved fluorescence resonance energy transfer (FRET) studies can be reconciled, and we put forward a model for myosin force generation on actin.
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Affiliation(s)
- Anne Houdusse
- Structural Motility, Institut Curie, PSL Research University, CNRS, UMR 144, F-75005, Paris, France; Sorbonne Universités, UPMC Univ Paris06, Sorbonne Universités, IFD, 4 Place Jussieu, 75252 Paris cedex 05, France.
| | - H Lee Sweeney
- Department of Pharmacology & Therapeutics and the Myology Institute, University of Florida College of Medicine, PO Box 100267, Gainesville, FL 32610-0267, USA.
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15
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Loss of cargo binding in the human myosin VI deafness mutant (R1166X) leads to increased actin filament binding. Biochem J 2016; 473:3307-19. [PMID: 27474411 PMCID: PMC5074368 DOI: 10.1042/bcj20160571] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 07/28/2016] [Indexed: 12/31/2022]
Abstract
Mutations in myosin VI have been associated with autosomal-recessive (DFNB37) and autosomal-dominant (DFNA22) deafness in humans. Here, we characterise an myosin VI nonsense mutation (R1166X) that was identified in a family with hereditary hearing loss in Pakistan. This mutation leads to the deletion of the C-terminal 120 amino acids of the myosin VI cargo-binding domain, which includes the WWY-binding motif for the adaptor proteins LMTK2, Tom1 as well as Dab2. Interestingly, compromising myosin VI vesicle-binding ability by expressing myosin VI with the R1166X mutation or with single point mutations in the adaptor-binding sites leads to increased F-actin binding of this myosin in vitro and in vivo As our results highlight the importance of cargo attachment for regulating actin binding to the motor domain, we perform a detailed characterisation of adaptor protein binding and identify single amino acids within myosin VI required for binding to cargo adaptors. We not only show that the adaptor proteins can directly interact with the cargo-binding tail of myosin VI, but our in vitro studies also suggest that multiple adaptor proteins can bind simultaneously to non-overlapping sites in the myosin VI tail. In conclusion, our characterisation of the human myosin VI deafness mutant (R1166X) suggests that defects in cargo binding may leave myosin VI in a primed/activated state with an increased actin-binding ability.
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16
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ALPK1 phosphorylates myosin IIA modulating TNF-α trafficking in gout flares. Sci Rep 2016; 6:25740. [PMID: 27169898 PMCID: PMC4864424 DOI: 10.1038/srep25740] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 04/21/2016] [Indexed: 01/07/2023] Open
Abstract
Gout is characterized by the monosodium urate monohydrate (MSU)-induced arthritis. Alpha kinase-1 (ALPK1) has shown to be associated with MSU-induced inflammation and gout. Here, we used bioinformatics, proteomics, cell models, and twenty in vitro human assays to clarify some of its role in the inflammatory response to MSU. We found myosin IIA to be a frequent interacting protein partner of ALPK1, binding to its N-terminal and forming a protein complex with calmodulin and F-actin, and that MSU-induced ALPK1 phosphorylated the myosin IIA. A knockdown of endogenous ALPK1 or myosin IIA significantly reduced the MSU-induced secretion of tumour necrosis factor (TNF)-α. Furthermore, all gouty patients expressed higher basal protein levels of ALPK1, myosin IIA, and plasma TNF-α, however those medicated with colchicine has shown reduced myosin IIA and TNF-α but not ALPK1. The findings suggest ALPK1 is a kinase that participates in the regulation of Golgi-derived TNF-α trafficking through myosin IIA phosphorylation in the inflammation of gout. This novel pathway could be blocked at the level of myosin by colchicine in gout treatment.
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17
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Trapani V, Luongo F, Arduini D, Wolf FI. Magnesium Modulates Doxorubicin Activity through Drug Lysosomal Sequestration and Trafficking. Chem Res Toxicol 2016; 29:317-22. [PMID: 26918850 DOI: 10.1021/acs.chemrestox.5b00478] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Magnesium is directly involved in the control of cell growth and survival, but its role in cancer biology and therapy is multifaceted; in particular, it is highly controversial whether magnesium levels can affect therapy outcomes. Here we investigated whether magnesium availability can modulate cellular responses to the widely used chemotherapeutic doxorubicin. We used an in vitro model consisting of mammary epithelial HC11 cells and found that high magnesium availability was correlated with diminished sensitivity both in cells chronically adapted to high magnesium concentrations and in acutely magnesium-supplemented cells. This decrease in sensitivity resulted from reduced intracellular doxorubicin accumulation in the face of a similar drug uptake rate. We observed that high-magnesium conditions caused a decrease in intracellular drug retention by altering drug lysosomal sequestration and trafficking. In our model, magnesium supplementation correspondingly modulated expression of the TRPM7 channel, which is known to control cytoskeletal organization and dynamics and may be involved in the proposed mechanism. Our findings suggest that magnesium supplementation in hypomagnesemic cancer patients may hinder response to therapy.
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Affiliation(s)
- Valentina Trapani
- Istituto di Patologia Generale, Facoltà di Medicina e Chirurgia "A. Gemelli", Università Cattolica del Sacro Cuore , Largo F. Vito 1, 00168 Rome, Italy
| | - Francesca Luongo
- Istituto di Patologia Generale, Facoltà di Medicina e Chirurgia "A. Gemelli", Università Cattolica del Sacro Cuore , Largo F. Vito 1, 00168 Rome, Italy
| | - Daniela Arduini
- Istituto di Patologia Generale, Facoltà di Medicina e Chirurgia "A. Gemelli", Università Cattolica del Sacro Cuore , Largo F. Vito 1, 00168 Rome, Italy
| | - Federica I Wolf
- Istituto di Patologia Generale, Facoltà di Medicina e Chirurgia "A. Gemelli", Università Cattolica del Sacro Cuore , Largo F. Vito 1, 00168 Rome, Italy
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18
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Kittelberger N, Breunig M, Martin R, Knölker HJ, Miklavc P. The role of myosin 1c and myosin 1b in surfactant exocytosis. J Cell Sci 2016; 129:1685-96. [PMID: 26940917 PMCID: PMC4852769 DOI: 10.1242/jcs.181313] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 02/25/2016] [Indexed: 12/19/2022] Open
Abstract
Actin and actin-associated proteins have a pivotal effect on regulated exocytosis in secretory cells and influence pre-fusion as well as post-fusion stages of exocytosis. Actin polymerization on secretory granules during the post-fusion phase (formation of an actin coat) is especially important in cells with large secretory vesicles or poorly soluble secretions. Alveolar type II (ATII) cells secrete hydrophobic lipo-protein surfactant, which does not easily diffuse from fused vesicles. Previous work showed that compression of actin coat is necessary for surfactant extrusion. Here, we investigate the role of class 1 myosins as possible linkers between actin and membranes during exocytosis. Live-cell microscopy showed translocation of fluorescently labeled myosin 1b and myosin 1c to the secretory vesicle membrane after fusion. Myosin 1c translocation was dependent on its pleckstrin homology domain. Expression of myosin 1b and myosin 1c constructs influenced vesicle compression rate, whereas only the inhibition of myosin 1c reduced exocytosis. These findings suggest that class 1 myosins participate in several stages of ATII cell exocytosis and link actin coats to the secretory vesicle membrane to influence vesicle compression.
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Affiliation(s)
- Nadine Kittelberger
- Institute of General Physiology, Ulm University, Albert-Einstein Allee 11, Ulm 89081, Germany
| | - Markus Breunig
- Institute of General Physiology, Ulm University, Albert-Einstein Allee 11, Ulm 89081, Germany
| | - René Martin
- Department of Chemistry, Technische Universität Dresden, Bergstr. 66, Dresden 01069, Germany
| | - Hans-Joachim Knölker
- Department of Chemistry, Technische Universität Dresden, Bergstr. 66, Dresden 01069, Germany
| | - Pika Miklavc
- Institute of General Physiology, Ulm University, Albert-Einstein Allee 11, Ulm 89081, Germany
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19
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Arous C, Halban PA. The skeleton in the closet: actin cytoskeletal remodeling in β-cell function. Am J Physiol Endocrinol Metab 2015; 309:E611-20. [PMID: 26286869 DOI: 10.1152/ajpendo.00268.2015] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 08/11/2015] [Indexed: 01/13/2023]
Abstract
Over the last few decades, biomedical research has considered not only the function of single cells but also the importance of the physical environment within a whole tissue, including cell-cell and cell-extracellular matrix interactions. Cytoskeleton organization and focal adhesions are crucial sensors for cells that enable them to rapidly communicate with the physical extracellular environment in response to extracellular stimuli, ensuring proper function and adaptation. The involvement of the microtubular-microfilamentous cytoskeleton in secretion mechanisms was proposed almost 50 years ago, since when the evolution of ever more sensitive and sophisticated methods in microscopy and in cell and molecular biology have led us to become aware of the importance of cytoskeleton remodeling for cell shape regulation and its crucial link with signaling pathways leading to β-cell function. Emerging evidence suggests that dysfunction of cytoskeletal components or extracellular matrix modification influences a number of disorders through potential actin cytoskeleton disruption that could be involved in the initiation of multiple cellular functions. Perturbation of β-cell actin cytoskeleton remodeling could arise secondarily to islet inflammation and fibrosis, possibly accounting in part for impaired β-cell function in type 2 diabetes. This review focuses on the role of actin remodeling in insulin secretion mechanisms and its close relationship with focal adhesions and myosin II.
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Affiliation(s)
- Caroline Arous
- Department of Genetic Medicine and Development, University of Geneva Medical Center, Geneva, Switzerland
| | - Philippe A Halban
- Department of Genetic Medicine and Development, University of Geneva Medical Center, Geneva, Switzerland
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20
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Papadopulos A, Gomez GA, Martin S, Jackson J, Gormal RS, Keating DJ, Yap AS, Meunier FA. Activity-driven relaxation of the cortical actomyosin II network synchronizes Munc18-1-dependent neurosecretory vesicle docking. Nat Commun 2015; 6:6297. [DOI: 10.1038/ncomms7297] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Accepted: 01/14/2015] [Indexed: 01/08/2023] Open
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21
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Casalou C, Seixas C, Portelinha A, Pintado P, Barros M, Ramalho JS, Lopes SS, Barral DC. Arl13b and the non-muscle myosin heavy chain IIA are required for circular dorsal ruffle formation and cell migration. J Cell Sci 2014; 127:2709-22. [PMID: 24777479 DOI: 10.1242/jcs.143446] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Arf-like protein Arl13b has been implicated in ciliogenesis and Sonic hedgehog signaling. Furthermore, we have previously shown that it regulates endocytic recycling traffic and interacts with actin. Herein, we report that the non-muscle myosin heavy chain IIA, also known as Myh9, is an Arl13b effector. Moreover, we found that both proteins localized to circular dorsal ruffles (CDRs) induced by platelet-derived growth factor stimulation and are required for their formation. CDRs are ring-shaped actin-dependent structures formed on the dorsal cell surface and are involved in diverse processes, such as macropinocytosis, integrin recycling, internalization of receptor tyrosine kinases and cell migration. We found that Arl13b or Myh9 silencing impaired cell migration, suggesting that Arl13b is required for this function through the interaction with Myh9. Moreover, Arl13b silencing impaired neural crest cell migration in zebrafish embryos. Furthermore, we showed that Arl13b is required for the formation of CDRs in migrating cells. Thus, our results indicate a new role for Arl13b in actin cytoskeleton remodeling through the interaction with Myh9, by driving the formation of CDRs necessary for cell migration.
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Affiliation(s)
- Cristina Casalou
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - Cecília Seixas
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - Ana Portelinha
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - Petra Pintado
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - Mafalda Barros
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - José S Ramalho
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - Susana S Lopes
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - Duarte C Barral
- CEDOC, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
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22
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Jia J, Bosley AD, Thompson A, Hoskins JW, Cheuk A, Collins I, Parikh H, Xiao Z, Ylaya K, Dzyadyk M, Cozen W, Hernandez BY, Lynch CF, Loncarek J, Altekruse SF, Zhang L, Westlake CJ, Factor VM, Thorgeirsson S, Bamlet WR, Hewitt SM, Petersen GM, Andresson T, Amundadottir LT. CLPTM1L promotes growth and enhances aneuploidy in pancreatic cancer cells. Cancer Res 2014; 74:2785-95. [PMID: 24648346 DOI: 10.1158/0008-5472.can-13-3176] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Genome-wide association studies (GWAS) of 10 different cancers have identified pleiotropic cancer predisposition loci across a region of chromosome 5p15.33 that includes the TERT and CLPTM1L genes. Of these, susceptibility alleles for pancreatic cancer have mapped to the CLPTM1L gene, thus prompting an investigation of the function of CLPTM1L in the pancreas. Immunofluorescence analysis indicated that CLPTM1L localized to the endoplasmic reticulum where it is likely embedded in the membrane, in accord with multiple predicted transmembrane domains. Overexpression of CLPTM1L enhanced growth of pancreatic cancer cells in vitro (1.3-1.5-fold; PDAY7 < 0.003) and in vivo (3.46-fold; PDAY68 = 0.039), suggesting a role in tumor growth; this effect was abrogated by deletion of two hydrophilic domains. Affinity purification followed by mass spectrometry identified an interaction between CLPTM1L and non-muscle myosin II (NMM-II), a protein involved in maintaining cell shape, migration, and cytokinesis. The two proteins colocalized in the cytoplasm and, after treatment with a DNA-damaging agent, at the centrosomes. Overexpression of CLPTM1L and depletion of NMM-II induced aneuploidy, indicating that CLPTM1L may interfere with normal NMM-II function in regulating cytokinesis. Immunohistochemical analysis revealed enhanced staining of CLPTM1L in human pancreatic ductal adenocarcinoma (n = 378) as compared with normal pancreatic tissue samples (n = 17; P = 1.7 × 10(-4)). Our results suggest that CLPTM1L functions as a growth-promoting gene in the pancreas and that overexpression may lead to an abrogation of normal cytokinesis, indicating that it should be considered as a plausible candidate gene that could explain the effect of pancreatic cancer susceptibility alleles on chr5p15.33.
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Affiliation(s)
- Jinping Jia
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Allen D Bosley
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Abbey Thompson
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Jason W Hoskins
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Adam Cheuk
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Irene Collins
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Hemang Parikh
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Zhen Xiao
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Kris Ylaya
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Marta Dzyadyk
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Wendy Cozen
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Brenda Y Hernandez
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Charles F Lynch
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Jadranka Loncarek
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Sean F Altekruse
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Lizhi Zhang
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Christopher J Westlake
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Valentina M Factor
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Snorri Thorgeirsson
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - William R Bamlet
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Stephen M Hewitt
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Gloria M Petersen
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Thorkell Andresson
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
| | - Laufey T Amundadottir
- Authors' Affiliations: Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics; Pediatric Oncology Branch; Laboratory of Pathology; Division of Cancer Control and Population Sciences; Laboratory of Experimental Carcinogenesis, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda; Laboratory of Proteomics and Analytical Technologies, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research; Laboratory of Protein Dynamics and Signaling and Laboratory of Cell & Developmental Signaling, NCI-Frederick, Frederick, Maryland; Keck School of Medicine, University of Southern California, Los Angeles, California; University of Hawaii Cancer Center, Honolulu, Hawaii; Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa; and Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
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23
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Stall R, Ramos J, Kent Fulcher F, Patel YM. Regulation of myosin IIA and filamentous actin during insulin-stimulated glucose uptake in 3T3-L1 adipocytes. Exp Cell Res 2013; 322:81-8. [PMID: 24374234 DOI: 10.1016/j.yexcr.2013.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 12/04/2013] [Accepted: 12/08/2013] [Indexed: 11/18/2022]
Abstract
Insulin stimulated glucose uptake requires the colocalization of myosin IIA (MyoIIA) and the insulin-responsive glucose transporter 4 (GLUT4) at the plasma membrane for proper GLUT4 fusion. MyoIIA facilitates filamentous actin (F-actin) reorganization in various cell types. In adipocytes F-actin reorganization is required for insulin-stimulated glucose uptake. What is not known is whether MyoIIA interacts with F-actin to regulate insulin-induced GLUT4 fusion at the plasma membrane. To elucidate the relationship between MyoIIA and F-actin, we examined the colocalization of MyoIIA and F-actin at the plasma membrane upon insulin stimulation as well as the regulation of this interaction. Our findings demonstrated that MyoIIA and F-actin colocalized at the site of GLUT4 fusion with the plasma membrane upon insulin stimulation. Furthermore, inhibition of MyoII with blebbistatin impaired F-actin localization at the plasma membrane. Next we examined the regulatory role of calcium in MyoIIA-F-actin colocalization. Reduced calcium or calmodulin levels decreased colocalization of MyoIIA and F-actin at the plasma membrane. While calcium alone can translocate MyoIIA it did not stimulate F-actin accumulation at the plasma membrane. Taken together, we established that while MyoIIA activity is required for F-actin localization at the plasma membrane, it alone is insufficient to localize F-actin to the plasma membrane.
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Affiliation(s)
- Richard Stall
- Department of Biology, University of North Carolina at Greensboro, 312 Eberhart Building, Greensboro, NC 27412, USA
| | - Joseph Ramos
- Department of Biology, University of North Carolina at Greensboro, 312 Eberhart Building, Greensboro, NC 27412, USA
| | - F Kent Fulcher
- Department of Biology, University of North Carolina at Greensboro, 312 Eberhart Building, Greensboro, NC 27412, USA
| | - Yashomati M Patel
- Department of Biology, University of North Carolina at Greensboro, 312 Eberhart Building, Greensboro, NC 27412, USA.
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24
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Papadopulos A, Tomatis VM, Kasula R, Meunier FA. The cortical acto-Myosin network: from diffusion barrier to functional gateway in the transport of neurosecretory vesicles to the plasma membrane. Front Endocrinol (Lausanne) 2013; 4:153. [PMID: 24155741 PMCID: PMC3800816 DOI: 10.3389/fendo.2013.00153] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 10/05/2013] [Indexed: 01/14/2023] Open
Abstract
Dysregulation of regulated exocytosis is linked to an array of pathological conditions, including neurodegenerative disorders, asthma, and diabetes. Understanding the molecular mechanisms underpinning neuroexocytosis including the processes that allow neurosecretory vesicles to access and fuse with the plasma membrane and to recycle post-fusion, is therefore critical to the design of future therapeutic drugs that will efficiently tackle these diseases. Despite considerable efforts to determine the principles of vesicular fusion, the mechanisms controlling the approach of vesicles to the plasma membrane in order to undergo tethering, docking, priming, and fusion remain poorly understood. All these steps involve the cortical actin network, a dense mesh of actin filaments localized beneath the plasma membrane. Recent work overturned the long-held belief that the cortical actin network only plays a passive constraining role in neuroexocytosis functioning as a physical barrier that partly breaks down upon entry of Ca(2+) to allow secretory vesicles to reach the plasma membrane. A multitude of new roles for the cortical actin network in regulated exocytosis have now emerged and point to highly dynamic novel functions of key myosin molecular motors. Myosins are not only believed to help bring about dynamic changes in the actin cytoskeleton, tethering and guiding vesicles to their fusion sites, but they also regulate the size and duration of the fusion pore, thereby directly contributing to the release of neurotransmitters and hormones. Here we discuss the functions of the cortical actin network, myosins, and their effectors in controlling the processes that lead to tethering, directed transport, docking, and fusion of exocytotic vesicles in regulated exocytosis.
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Affiliation(s)
- Andreas Papadopulos
- Queensland Brain Institute, The University of Queensland, St Lucia Campus, Brisbane, QLD, Australia
| | - Vanesa M. Tomatis
- Queensland Brain Institute, The University of Queensland, St Lucia Campus, Brisbane, QLD, Australia
| | - Ravikiran Kasula
- Queensland Brain Institute, The University of Queensland, St Lucia Campus, Brisbane, QLD, Australia
| | - Frederic A. Meunier
- Queensland Brain Institute, The University of Queensland, St Lucia Campus, Brisbane, QLD, Australia
- *Correspondence: Frederic A. Meunier, Queensland Brain Institute, The University of Queensland, St Lucia Campus, QBI Building #79, St Lucia, QLD 4072, Australia e-mail:
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25
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Jakab RL, Collaco AM, Ameen NA. Characterization of CFTR High Expresser cells in the intestine. Am J Physiol Gastrointest Liver Physiol 2013; 305:G453-65. [PMID: 23868408 PMCID: PMC3761243 DOI: 10.1152/ajpgi.00094.2013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The CFTR High Expresser (CHE) cells express eightfold higher levels of the cystic fibrosis transmembrane conductance regulator (CFTR) Cl(-) channel compared with neighboring enterocytes and were first identified by our laboratory (Ameen et al., Gastroenterology 108: 1016, 1995). We used double-label immunofluorescence microscopy to further study these enigmatic epithelial cells in rat intestine in vivo or ex vivo. CHE cells were found in duodenum, most frequent in proximal jejunum, and absent in ileum and colon. CFTR abundance increased in CHE cells along the crypt-villus axis. The basolateral Na(+)K(+)Cl(-) cotransporter NKCC1, a key transporter involved in Cl(-) secretion, was detected at similar levels in CHE cells and neighboring enterocytes at steady state. Microvilli appeared shorter in CHE cells, with low levels of Myosin 1a, a villus enterocyte-specific motor that retains sucrase/isomaltase in the brush-border membrane (BBM). CHE cells lacked alkaline phosphatase and absorptive villus enterocyte BBM proteins, including Na(+)H(+) exchanger NHE3, Cl(-)/HCO3(-) exchanger SLC26A6 (putative anion exchanger 1), and sucrase/isomaltase. High levels of the vacuolar-ATPase proton pump were observed in the apical domain of CHE cells. Levels of the NHE regulatory factor NHERF1, Na-K-ATPase, and Syntaxin 3 were similar to that of neighboring enterocytes. cAMP or acetylcholine stimulation robustly increased apical CFTR and basolateral NKCC1 disproportionately in CHE cells relative to neighboring enterocytes. These data strongly argue for a specialized role of CHE cells in Cl(-)-mediated "high-volume" fluid secretion on the villi of the proximal small intestine.
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Affiliation(s)
- Robert L. Jakab
- Departments of 1Pediatrics/Gastroenterology and Hepatology, and
| | - Anne M. Collaco
- Departments of 1Pediatrics/Gastroenterology and Hepatology, and
| | - Nadia A. Ameen
- Departments of 1Pediatrics/Gastroenterology and Hepatology, and ,2Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut
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26
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Khandelwal P, Prakasam HS, Clayton DR, Ruiz WG, Gallo LI, van Roekel D, Lukianov S, Peränen J, Goldenring JR, Apodaca G. A Rab11a-Rab8a-Myo5B network promotes stretch-regulated exocytosis in bladder umbrella cells. Mol Biol Cell 2013; 24:1007-19. [PMID: 23389633 PMCID: PMC3608489 DOI: 10.1091/mbc.e12-08-0568] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 01/29/2013] [Accepted: 01/30/2013] [Indexed: 12/03/2022] Open
Abstract
Multiple Rabs are associated with secretory granules/vesicles, but how these GTPases are coordinated to promote regulated exocytosis is not well understood. In bladder umbrella cells a subapical pool of discoidal/fusiform-shaped vesicles (DFVs) undergoes Rab11a-dependent regulated exocytosis in response to bladder filling. We show that Rab11a-associated vesicles are enmeshed in an apical cytokeratin meshwork and that Rab11a likely acts upstream of Rab8a to promote exocytosis. Surprisingly, expression of Rabin8, a previously described Rab11a effector and guanine nucleotide exchange factor for Rab8, stimulates stretch-induced exocytosis in a manner that is independent of its catalytic activity. Additional studies demonstrate that the unconventional motor protein myosin5B motor (Myo5B) works in association with the Rab8a-Rab11a module to promote exocytosis, possibly by ensuring transit of DFVs through a subapical, cortical actin cytoskeleton before fusion. Our results indicate that Rab11a, Rab8a, and Myo5B function as part of a network to promote stretch-induced exocytosis, and we predict that similarly organized Rab networks will be common to other regulated secretory pathways.
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Affiliation(s)
- Puneet Khandelwal
- Departments of Medicine, University of Pittsburgh, Pittsburgh, PA 15261
| | | | - Dennis R. Clayton
- Departments of Medicine, University of Pittsburgh, Pittsburgh, PA 15261
| | - Wily G. Ruiz
- Departments of Medicine, University of Pittsburgh, Pittsburgh, PA 15261
| | - Luciana I. Gallo
- Departments of Medicine, University of Pittsburgh, Pittsburgh, PA 15261
| | - Daniel van Roekel
- Departments of Medicine, University of Pittsburgh, Pittsburgh, PA 15261
| | - Stefan Lukianov
- Departments of Medicine, University of Pittsburgh, Pittsburgh, PA 15261
| | - Johan Peränen
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
| | - James R. Goldenring
- Department of Surgery and Epithelial Biology Center, Vanderbilt University, Nashville, TN 37232
| | - Gerard Apodaca
- Departments of Medicine, University of Pittsburgh, Pittsburgh, PA 15261
- Cell Biology, University of Pittsburgh, Pittsburgh, PA 15261
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27
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Arous C, Rondas D, Halban PA. Non-muscle myosin IIA is involved in focal adhesion and actin remodelling controlling glucose-stimulated insulin secretion. Diabetologia 2013; 56:792-802. [PMID: 23354122 DOI: 10.1007/s00125-012-2800-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 11/19/2012] [Indexed: 12/22/2022]
Abstract
AIMS/HYPOTHESIS Actin and focal adhesion (FA) remodelling are essential for glucose-stimulated insulin secretion (GSIS). Non-muscle myosin II (NM II) isoforms have been implicated in such remodelling in other cell types, and myosin light chain kinase (MLCK) and Rho-associated coiled-coil-containing kinase (ROCK) are upstream regulators of NM II, which is known to be involved in GSIS. The aim of this work was to elucidate the implication and regulation of NM IIA and IIB in beta cell actin and FA remodelling, granule trafficking and GSIS. METHODS Inhibitors of MLCK, ROCK and NM II were used to study NM II activity, and knockdown of NM IIA and IIB to determine isoform specificity, using sorted primary rat beta cells. Insulin was measured by radioimmunoassay. Protein phosphorylation and subcellular distribution were determined by western blot and confocal immunofluorescence. Dynamic changes were monitored by live cell imaging and total internal reflection fluorescence microscopy using MIN6B1 cells. RESULTS NM II and MLCK inhibition decreased GSIS, associated with shortening of peripheral actin stress fibres, and reduced numbers of FAs and insulin granules in close proximity to the basal membrane. By contrast, ROCK inhibition increased GSIS and caused disassembly of glucose-induced central actin stress fibres, resulting in large FAs without any effect on FA number. Only glucose-induced NM IIA reorganisation was blunted by MLCK inhibition. NM IIA knockdown decreased GSIS, levels of FA proteins and glucose-induced extracellular signal-regulated kinase 1/2 phosphorylation. CONCLUSIONS/INTERPRETATION Our data indicate that MLCK-NM IIA may modulate translocation of secretory granules, resulting in enhanced insulin secretion through actin and FA remodelling, and regulation of FA protein levels.
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Affiliation(s)
- C Arous
- Department of Genetic Medicine and Development, University Medical Centre, University of Geneva, 1 Michel Servet, 1211 Geneva 4, Switzerland.
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29
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Abstract
Epithelial cells have an apical-basolateral axis of polarity, which is required for epithelial functions including barrier formation, vectorial ion transport and sensory perception. Here we review what is known about the sorting signals, machineries and pathways that maintain this asymmetry, and how polarity proteins interface with membrane-trafficking pathways to generate membrane domains de novo. It is becoming apparent that membrane traffic does not simply reinforce polarity, but is critical for the generation of cortical epithelial cell asymmetry.
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30
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Bonn BR, Rudolf A, Hornbruch-Freitag C, Daum G, Kuckwa J, Kastl L, Buttgereit D, Renkawitz-Pohl R. Myosin heavy chain-like localizes at cell contact sites during Drosophila myoblast fusion and interacts in vitro with Rolling pebbles 7. Exp Cell Res 2012; 319:402-16. [PMID: 23246571 DOI: 10.1016/j.yexcr.2012.12.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Revised: 12/04/2012] [Accepted: 12/05/2012] [Indexed: 11/29/2022]
Abstract
Besides representing the sarcomeric thick filaments, myosins are involved in many cellular transport and motility processes. Myosin heavy chains are grouped into 18 classes. Here we show that in Drosophila, the unconventional group XVIII myosin heavy chain-like (Mhcl) is transcribed in the mesoderm of embryos, most prominently in founder cells (FCs). An ectopically expressed GFP-tagged Mhcl localizes in the growing muscle at cell-cell contacts towards the attached fusion competent myoblast (FCM). We further show that Mhcl interacts in vitro with the essential fusion protein Rolling pebbles 7 (Rols7), which is part of a protein complex established at cell contact sites (Fusion-restricted Myogenic-Adhesive Structure or FuRMAS). Here, branched F-actin is likely needed to widen the fusion pore and to integrate the myoblast into the growing muscle. We show that the localization of Mhcl is dependent on the presence of Rols7, and we postulate that Mhcl acts at the FuRMAS as an actin motor protein. We further show that Mhcl deficient embryos develop a wild-type musculature. We thus propose that Mhcl functions redundantly to other myosin heavy chains in myoblasts. Lastly, we found that the protein is detectable adjacent to the sarcomeric Z-discs, suggesting an additional function in mature muscles.
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Affiliation(s)
- Bettina R Bonn
- Developmental Biology, Department of Biology, Philipps-Universität Marburg, Karl-von-Frisch-Strasse 8, 35037 Marburg, Germany
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31
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Multiple roles for the actin cytoskeleton during regulated exocytosis. Cell Mol Life Sci 2012; 70:2099-121. [PMID: 22986507 DOI: 10.1007/s00018-012-1156-5] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 08/28/2012] [Accepted: 08/30/2012] [Indexed: 01/01/2023]
Abstract
Regulated exocytosis is the main mechanism utilized by specialized secretory cells to deliver molecules to the cell surface by virtue of membranous containers (i.e., secretory vesicles). The process involves a series of highly coordinated and sequential steps, which include the biogenesis of the vesicles, their delivery to the cell periphery, their fusion with the plasma membrane, and the release of their content into the extracellular space. Each of these steps is regulated by the actin cytoskeleton. In this review, we summarize the current knowledge regarding the involvement of actin and its associated molecules during each of the exocytic steps in vertebrates, and suggest that the overall role of the actin cytoskeleton during regulated exocytosis is linked to the architecture and the physiology of the secretory cells under examination. Specifically, in neurons, neuroendocrine, endocrine, and hematopoietic cells, which contain small secretory vesicles that undergo rapid exocytosis (on the order of milliseconds), the actin cytoskeleton plays a role in pre-fusion events, where it acts primarily as a functional barrier and facilitates docking. In exocrine and other secretory cells, which contain large secretory vesicles that undergo slow exocytosis (seconds to minutes), the actin cytoskeleton plays a role in post-fusion events, where it regulates the dynamics of the fusion pore, facilitates the integration of the vesicles into the plasma membrane, provides structural support, and promotes the expulsion of large cargo molecules.
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32
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Nightingale TD, Cutler DF, Cramer LP. Actin coats and rings promote regulated exocytosis. Trends Cell Biol 2012; 22:329-37. [DOI: 10.1016/j.tcb.2012.03.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Revised: 03/21/2012] [Accepted: 03/22/2012] [Indexed: 11/16/2022]
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33
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Gutiérrez LM. New insights into the role of the cortical cytoskeleton in exocytosis from neuroendocrine cells. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2012; 295:109-37. [PMID: 22449488 DOI: 10.1016/b978-0-12-394306-4.00009-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The cortical cytoskeleton is a dense network of filamentous actin (F-actin) that participates in the events associated with secretion from neuroendocrine cells. This filamentous web traps secretory vesicles, acting as a retention system that blocks the access of vesicles to secretory sites during the resting state, and it mediates their active directional transport during stimulation. The changes in the cortical cytoskeleton that drive this functional transformation have been well documented, particularly in cultured chromaffin cells. At the biochemical level, alterations in F-actin are governed by the activity of molecular motors like myosins II and V and by other calcium-dependent proteins that influence the polymerization and cross-linking of F-actin structures. In addition to modulating vesicle transport, the F-actin cortical network and its associated motor proteins also influence the late phases of the secretory process, including membrane fusion and the release of active substances through the exocytotic fusion pore. Here, we discuss the potential interactions between the F-actin cortical web and proteins such as SNAREs during secretion. We also discuss the role of the cytoskeleton in organizing the molecular elements required to sustain regulated exocytosis, forming a molecular structure that foments the efficient release of neurotransmitters and hormones.
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Affiliation(s)
- Luis M Gutiérrez
- Instituto de Neurociencias, Centro Mixto Universidad Miguel Hernández-CSIC, Sant Joan d’Alacant, Alicante, Spain
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