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Variation and immunocyochemical localization of processing enzymes in proopiomelanocortin cells during ontoneny

Research Project

Project/Area Number 04670002
Research Category

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

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

Principal Investigator

TANAKA Shigeyasu  Institute of Endocrinology, Gunma University, Research Associate, 内分泌研究所, 助手 (90146233)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1992: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsProcessing / Processing enzyme / Secretory granule / Pituitary gland / Immunocyochemistry / 内分泌細胞
Research Abstract

PC1/PC3 and PC2 are endoproteases involved in prohormone cleavage at pairs of basic amino acids. To determine the cellular and subcellular distribution of PC1/PC3 and PC2 in the pituitary glands, we generated their polyclonal antisera in rabbits, using two synthetic peptide antigens corresponding to amino acids 442-459 (ST-28) of PC1/PC3 and 613-629 (ST-29) of PC2 and two bacterially expressed antigens covering amino acids 145-414 (KN-1) of PC1/PC3 and 385-637 (KN-2) of PC2. Western blot analysis revealed the presence of PC1/PC3 87 and 68 kDa) and PC2 (70 kDa) in the rat pancreatic islets, indicating that each of the antisera was specific for the corresponding antigen. In the present immunocyochemical studies, many neuroendcrine cells displayd positive reaction to these antibodies. In almost all the animals as far as examined, PC1/PC3 and PC2 showed differential immunoreactivity in proopiomelanocortin (POMC) cells. In the anterior lobe, antiserum against PC1/PC3 exclusively immunostained corticotrophs in the intermediate lobe. Immunoelectron microscopy, using double-labeling with gold particles of different sizes revealed that almost all of immunolabeled ACTH- or alpha-MSH-secretory granules were also positive to PC1/PC3 and PC2 antibody. This differential localization of PC1/PC3 and PC2 provides a novel argument for the subtrate-specificity of the PC1/PC3 and PC2 enzymes in the processing of pituitary POMC cells. To elucidate factors that regulate changes in the processing patterns of POMC in the pituitary corticotrophs during postnatal development, in near further, the presence of PC1/PC3 and PC2 will be examined immunocytochemically.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Shigeyasu Tanaka: "A certain step of proteolytic processing of proopiomelanocortin occurs during the transition between two distinct stages of secretory granules maturation in rat anterior pituitary corticotrophs." Endocrinology. 131. 779-786 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Koichi Ishikawa: "Pro-opiomelanocortin(POMC)-containing neurons in rat median eminence." Neuroendocrinology. 56. 178-184 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 田中滋康: "分泌顆粒内における蛋白質のプロセシング" 生体の科学. 44. 107-115 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 田中滋康: "POMCプロセシングとその局在" 日本内分泌学会雑誌. 69. 704 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shigeyasu Tanaka: "Inhibition of proteolytic processing of proopiomelanocortin by bafilomycin A1 in AtT-20 cells." Cell Struct.Funct.18. 633 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 田中滋康: "下垂体におけるプロセシング酵素の免疫細胞化学的局在" 解剖学雑誌. In press (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Tanaka, S., and Kurosumi, K.: "A certain step of proteolytic processing of proopiomelanocortin occurs during the transition between two distinct stages of secretory granules maturation in rat anterior pituitary corticotrophs" Endocrinology. 131. 779-786 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Tanaka, K., Mizuatani, F., Yamamoto, K., Kikuyama, S., and Kurosumi, K.: "The alpha-subunit of glycoprotein hormones exists in the prolactin secretory granules of bullfrog (Rana catesbeiana) pituitary gland" Cell Tissue Res.267. 223-231 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ishikawa, K., Katakai, K., Tanaka, S., Haga, S., Mochida, H., and Itoh, K.: "Pro-opiomelanocortin (POMC)- containing neurons in rat median eminence" Neuroendocrinology. 56. 178-184 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Iwamuro, S., Tanaka, S., Sugihara, S., Nomizu, M., Hayashi, H., and Kikuyama, S.: "Secretion of immunoreactive joining peptide by the pituitary of the bullfrog Rana catesbeiana" Ann. NY Acad. Sci. 680. 552-554 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Akiyama, K., Nagata, S., Tanaka, S., Inoue, K., Watanabe, K., and Senshu, T.: "Search for functional significance of peptidylarginine deiminase in rat pituitaries : variation durin pregnancy and ultrastructural localization in prolactin cells" Cell Biol. Inter.17. 487-494 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shigeyasu Tanaka: "A certain step of proteolytic processing of proopiomelanocortin occurs during the transition between two distict stages of secretory granules maturation in rat anterior pituitary corticotrophs." Endocrinology. 131. 779-786 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] Koichi Ishikawa: "Proopiomelanocortin(POMC)-containiong neurons in rat median eminence." Neuroendocrinology. 56. 178-184 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 田中滋康: "分泌顆粒内における蛋白質のプロセシング" 生体の科学. 44. 107-115 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 田中滋康: "POMCプロセシングとその局在" 日本内分泌学会雑誌. 69. 704 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Shigeyasu Tanaka: "Inhibition of proteolytic processing of proopiomelanocortin by bafilomycin Al in AtT-20 cells." Cell Struct.Funct.18(In press). (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 田中滋康: "下垂体におけるプロセシング酵素の免疫細胞化学的局在" 解剖学雑誌. (In press). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Shigeyasu Tanaka: "A ceratin step of proteolytic processing of proopiomelanocortin occurs during the transition between two distinct stages of secretory granules maturation in rat anterior pituyitary corticotrophs." Endocrinology. 131. 779-786 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Koichi Ishikawa: "Proopiomelanocortin(POMC)‐containing neurons in rat median eminence." Neuroendocrinology. 56. 178-184 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 田中 滋康: "分泌顆粒内における蛋白質のプロセシング" 生体の科学. 44. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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