• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1996 Fiscal Year Final Research Report Summary

Molecular and cellular biology of dynamics and mechanisms of myofibrillogenesis

Research Project

Project/Area Number 06670010
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General anatomy (including Histology/Embryology)
Research InstitutionChiba University

Principal Investigator

SHIMADA Yutaka  Chiba University School of Medicine Professor, 医学部, 教授 (70009116)

Co-Investigator(Kenkyū-buntansha) KOMIYAMA Masatoshi  Chiba University School of Medicine Assistant, 医学部, 助手 (70175339)
TOYOTA Naoji  Chiba University School of Medicine Lecturer, 医学部, 講師 (00188822)
Project Period (FY) 1994 – 1996
Keywordsmyofibril / myoprotein / actin / myosin / troponin / development / regeneration / dynamics
Research Abstract

1.Order of appearance of myofibrillar proteins in embryonic chicken somites : Immunofluorescence microscopy revealed that in chicken cervical somites the proteins constituting myofibrils are not synthesized simultaneously and the turning-on of the gene expression of the adult isoforms was not dependent on the completion of the appearance of the major myofibrillar proteins. In situ hybridization showed that cardiac type troponin C mRNA appeared one stage (about 3 hours) earlier than its protein.
2.Troponin and dystrophin in regenerating muscle : In regenerating fibers of the slow (anterior latissimus dorsi) and fast (posterior latissimus dorsi) muscles of adult chickens, embryonic troponin was expressed earlier than dystrophin and changed to its adult isoform later than the stage when dystrophin exhibited the same appearance as that in normal muscle fibers. Further, although regenerating fibers in denervated muscle switched on the expression of troponin similarly to those in innervated m … More uscle, many of them again reverted to an embryonic state. However, no difference was found in the dystrophin expression between regenerating fibers with nerves intact and those with nerves resected. Thus, it appears that the expression of troponin and dystrophin genes in regulated independently during regeneration and nerves are required for the full development of the former protein while unnecessary for the latter.
3.Protein dynamics during myofibrillogenesis : Immunogold electron microscopy of cardiomyocytes microinjected with biotin-actin and -myosin showed that gold labeling was first found at the A band and the A-I junctional level of proximal myofibrils, respectively. Thus, polymerization of actin and myosin seems to occur in association with myosin filaments and with A-I junctional regions of myofibrils, respectively. Fluorescence recovery (FR) study of rhodamine-labeled muscle and nonmuscle actins microinjected into cultured chicken cardiomyocytes and fibroblasts showed that stress fibers had faster FR than myofibrils ; in myofibrils FR of muscle actin was faster than that of nonmuscle actin, and nascent myofibrils displayd different FR ; and stress fibers had similar FR at both proximal and terminal portions with both muscle and nonmuscle actins. Less

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Masatoshi Komiyama: "Troponin and dystrophin in regenerating muscle fibers with and without denervation." Muscle & Nerve. 17(9). 1062-1064 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Zhen-Hua Zhou: "Effects of cycloclorotine on myofibrils in cardiomyocytes and on actin filament bundles in fibroblasts in vitro." Natural Toxins. 2(6). 378-385 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yutaka Shimada: "Development of connection/titin and nebulin in striated muscles of the chicken." Advances in Biophysics. 33. 223-234 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masatoshi Komiyama: "The intracellular sorting of myosin alkali light chain isoproteins reflects the sequence of developmental expression as determined by double epitope-tagging competition." Journal of Cell Science. 109. 2089-2099 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yutaka Shimada: "Dynamics of actin in cardiac myofibrils and fibroblast stress fibers." Cell Structure and Function. 22(1)(印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Naoji Toyota: "Developmental Mechanisms of Heart Diseases (Expression of troponin C and I genes analyzed at the mRNA and protein levels in developing muscles.)" Futura., 679(71-77) (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 嶋田 裕: "新筋病理学(デスミン,ビメンチン,シネミン,フィラミン)" 南江堂, 946(254-260) (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Komiyama, M., Toyota, N.and Shimada, Y.: "Troponin and dystrophin in regenerating muscle ribers with and without denervation" Muscle Nerve. 17 (9). 1062-1064 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Zhou, Z.-H., Komiyama, M., Terao, K.and Shimada, Y.: "Effects of cycloclorotine on myofibrils in cardiomyocytes and on actin filament bundles in fibroblasts in vitro" Natural Toxins. 2 (6). 378-385 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shimada, Y., Komiyama, M., Begum, S.and Maruyama, K.: "Development of connectin/titin and nebulin in striated muscles of chicken" Adv.Biophys.33. 223-234 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Komiyama, M., Soldati, T., von Ary, P.and P Perriard, J.-C.: "The intracellular sorting of myosin alkali light chain isoproteins reflects the sequence of developmental expression as determined by double epitope-tagging competition" J.Cell Sci.109. 2089-2099 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shimada, Y., Suzuki, H.and Konno, A.: "Dynamics of actin in cardiac myofibrils and fibroblast stress fibers" Cell Struct.Funct.22 (1) (In press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toyota, N.and Shimada, Y.: Expression of troponin C and I genes analyzed at the mRNA and protein levels in developing muscles. In : Developmental Mechanisms of Heart Diseases. Futura, 71-77 (1995)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-03-09  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi