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1997 Fiscal Year Final Research Report Summary

Neuropeptides and phorbolester-induced skin tumor promotion

Research Project

Project/Area Number 07670960
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Dermatology
Research InstitutionOSAKA CITY UNIVERSITY

Principal Investigator

KONO Takeshi  Osaka City University, Medical school, Lecturer, 医学部, 講師 (50170197)

Co-Investigator(Kenkyū-buntansha) MIZUNO Nobuyuki  Osaka City University, Medical school, Lecturer, 医学部, 講師 (80271188)
Project Period (FY) 1995 – 1997
KeywordsTumor promotion / Neuropeptides / carcinogenesis
Research Abstract

We investigated relations of some neuropeptides (NP) and tumor promotion process in the skin. NPs used were substance P (SP), calcitonin gene-related peptide (CGRP), vasoactive intestinal peptide (VIP), nerve growth factor (NGF), beta-endorphine (beta-EP) and somatostatin (SOM). As a tumor promotional stimulation. 12-o-tetradecanoypholbol-13-acetate (TPA) was applied to the guinea pig skin.
TPA treatment had no effect on tissue or blood concentration of CGRP,VIP,NGF,SOM.SP concentation increased in the tissue in 6 hr after TPA treatment, and in the blood within 12 hr. beta-EP concentration increased only in the blood in 6 hr.
As a next step, interrelations between NPs and ornithine decarboxylase (ODC), a marker enzyme for tumor promotion process, were investigated. NGF or beta-EP had no effect on TPA-induced ODC activity. On the other hand, SP,CGRP and SOM suppressed TPA-induced ODC activity by about 60% at 3,6 and 9 hrs after TPA treatment. VIP showed biphasic action. VIP pre-treatment stimulated ODC activity, but VIP post-treatment suppressed ODC activity. Any NP had no effect on ODC mRNA level and TPA-stimulated keratinocyte proliferation in tissue section.
These results suggest interactions between TPA-induced tumor promotional process in the skin and NPs.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] 幸野 健、水野 信之: "各種神経ペプチドと腫瘍プロモーション" 皮膚(Skin Research). 40. 未定 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kono Takeshi, Mizuno Nobuyuki: Neuropeptides and phorbolester-induced skin tumor promotion. 40(in press). (1998)

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

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Published: 1999-03-16  

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