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Correlation between structure and function of the seminiferous tubule wall and its excurrent duct wall.

Research Project

Project/Area Number 06670008
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field General anatomy (including Histology/Embryology)
Research InstitutionDepaartment of Anatomy, School of Medicine, Chiba University.

Principal Investigator

NAGANO Toshio  Chiba University, School of Medicine, Department of Anatomy. Professor., 医学部, 教授 (60009082)

Co-Investigator(Kenkyū-buntansha) MAEKAWA Mamiko  Chiba University, School of Medicine, Department of Anatomy. Assistant., 医学部, 助手 (20181571)
TOYOTA Fumie  Chiba University, School of Medicine, Department of Anatomy. Associated Professo, 医学部, 助教授 (60009751)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordsmyoid cell / actin / alpha actinin / testicular interstitial tissue in men / Sertoli cell / アルファアクチニン / ヒトの間質組織 / セルトリ細胞 / アクチン細糸 / 筋様細胞肉 / 発生 / 停留精巣 / 精細管
Research Abstract

Peritubular myoid cells, surrounding the seminiferous tubule have been found in all mammalian species, but their organization varies by species. In laboratory rodents, only one layr of myoid cells is seen. The cells are joined by junctional complexes as are epithelial cells. On the other hand, several cellular layrs exist in the lamina propria of the seminiferous tubule in the human and some other animals. Myoid cells contain abundant actin filaments which are distributed in the cytoplasm in a species-specific manner. In the rat, the filaments within one myoid cell run both longitudinally and circularly to the long axis of the tubule, exhibiting a latice-work pattern. The arrangement of the filaments changes during postnatal development, and the disruption of spermatogenesis, such as cryptorchidism, seems to affect the arrangement of the filaments.
Other cytoskeletal proteins, including myosin desmin, actinin, are also found in the cells. Myoid cells have been shown to be contractile, involed in the transport of spermatozoa and testicular fluid. It has been reported that biological active substances, prostaglandins, TGF,androgen receptors are known to affec the myoid cells. It is now evident that the myoid cells not only provide structural integrity to the tubule but take part in the regulation of spermatogenesis and testicular function.
In human, myofibroblasts in the lamina propria are large, flat individual cells branched in a network of microfibrils and collagen fibrils in the tubular wall. They are arranged in discontinuous cell layrs with interposed layrs of extracellular matrix. They express both antigens of smooth muscle cells and of connective tissue cells. Our experiments indicate that the contractility of myofibroblasts of men may be in part modulated by the NO/cGMP-system.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Maekawa M., Kazama H., Kamimura K., Nagano T.: "Changes in the arrangement of actin filaments in myoid cells and sertoli cells of the rat testis." Anat,Rec.241. 59-69 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 永野俊雄,前川真見子: "げっ歯類精細管壁の構造と機能" 解剖学雑誌. 70. S71- (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Maekawa M., Kamimura K., Nagano T.: "Peritubular myoid cells in the testis Their structure and function." Arch.Histol.Cytol.59. 1-13 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Holstein A.F., Maekawa M.,Nagano T., Davidoff M.S.: "myofibroblasts in the lamina propria of human seminiferous tubules are dynamic structures of heterogeneous phenotype." Arch, Histol, Cytol.59(印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Maekawa, M., Kazama, H., Kamimura, K.and Nagano, T.: "Changes in the arragement of actin filaments in myoid cells and Sertoli cells of rattestis during postnatal development and after experimental" cryptorchidisms. Anat. Rec.241. 59-69 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Maekawa, M.and Nagano, T: "Peritubular myoid cells in the testis : Their stsructure and function." Arch. Histol. Cytol.59. 1-13 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Holstein, A.F., Maekawa, M., Nagano, T.and Davidoff, M.S.: "Myofibroblasts in the lamina propria of human seminiferous tubules are dynamic structures of heterogeneous phenotype." Arch. Histol. Cytol.59(in press.). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Maekawa,M.Kazama,H.Kamimura,K.Nagano.T: "Changes in the arrangement of actin fildments in my oid cells and Sertoli cells of rat testis" Anat. Rec,. 241. 59-69 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 永野俊雄,前川真見子: "げっ歯類精細管壁の構造と機能" 解剖学雑誌. 70. S71 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Maekawa,M.Kamimura,K.Nagano.T,: "Peritubular my oid cells in the testis; Shncture and function" Arch.Histol,Cytol.59. 1-13 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Holslein,AF.Maekawa M,Nagano T.Daridoft MS.: "Myofibroblasts in the lamina propria of human Seminiferous tubules are dynamic shnctures" Arch, Histol. Cytol.59(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Maekawa,M. Kazama,H. Kamimura,K. Nagano,T.: "Changes in the arrangement of actin filaments in myoid ce0lls and Sertoli cells of rat testes during postnatal development." Anatomical Record. 241. 59-69 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 永野俊雄,前川眞見子: "整歯類精細管壁の構造と機能の関連" 解剖学雑誌. 70(シンポジウム発表予定). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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