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

2000 Fiscal Year Final Research Report Summary

Ultraviolet permeability through skin of wild animals and skin degeneration by ultraviolet rays

Research Project

Project/Area Number 11670073
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental physiology (including Physical medicine and Nutritional physiology)
Research InstitutionInstitute of Tropical Medicine, Nagasaki University

Principal Investigator

OHWATARI Nobu  Department of Environmental Physiology, Institute of Tropical Medicine, Associate professor, 熱帯医学研究所, 助教授 (80128165)

Co-Investigator(Kenkyū-buntansha) TORIYAMA Kan  Department of Pathology, Institute of Tropical Medicine, Associate professor, 熱帯医学研究所, 助教授 (00108359)
KUMATORI Atsusi  Department of Biochemistry, Institute of Tropical Medicine, Assistant professor, 熱帯医学研究所, 講師 (60244092)
FUJIMAKI Yasunori  Department of Parasitology, Institute of Tropical Medicine, Assistant professor, 熱帯医学研究所, 講師 (10209083)
KANEDA Eiko  Department of Environmental Physiology, Institute of Tropical Medicine, Research Associate, 熱帯医学研究所, 助手 (10253626)
Project Period (FY) 1999 – 2000
KeywordsEnvironmental biology / Wild mammals / Ultraviolet rays (UV) / Defense to UV / Dermatopathy by UV / Transmission rate of UV / 環境因子
Research Abstract

The living being on earth has been acquiring defense function to ultraviolet rays in process of evolution. The defense function of mammalian is classified roughly in body hair characteristic type and cutis organization characteristic type. Wild animals of Pika, Yellow rat, Jird and Asiatic chipmunk in China have a two colors stratification of body hair. In this study, the black lower part of body hair absorbed significantly ultraviolet rays (UV) energy in comparison with white hair in wistar rat, and the two colors structure of body hair is effective function to protect the skin from UV for the body hair characteristic type.
On the skin tissue lesions induced by UV-B irradiation, the wild animals were light lesion due to the two colors structure of body hair compared with wistar rat with inflammatory cell infiltration, edema, crust formation, and fibrosis.
In these wild animals, negative correlation was recognized during ultraviolet permeability through body hair with epidermis and UV intensity in habitation. The defense effect to UV in each species was different depend on UV intensity in habitation by reason of difference of length and density of hair in each species.
Air temperature in environmental factor is important to decide the defense form to UV as well as UV intensity. Because long hair disturbs heat loss in hot environment. For example on yellow rat inhabited near desert, the hair length is short, but epidermis is thick for defense to UV.On the other hand, seasonal variation of defense ability to UV was no statistical significance in each Species.
Wild animals keep effective defense function to UV corresponding to habitat condition with color, length and density of hair and thickness of epidermis and skin color.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Ohwatari N: "Depression of immunological ability by ultraviolet rays and protection from ultraviolet."Jpn J Trop Med. 28(1). 96-97 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ohwatari N: "TGF-β 1 mediates 70-kDa heat shock protein induction due to ultraviolet irradiation in human skin fibroblasts"Pfliigers Arch-Eur J Physiol. 438. 239-244 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toriyama K: "Pathology of Zoonoses"Host Response to International Parasitic Zoonoses. 15-24 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kumatori A: "Cisplatin-induced apoptosis in human proximal tubular epithelial cells is associated with the activation of the Fas/Fas eigand system"Histochem Cell Biol. 111. 359-365 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Fujimaki Y: "Detection of circulating Wuchereria bancrofti antigen, filaria specific IgG and IgG4 in chyluria casesin Japan"Japan Journal of Tropical Medicine and Hygien. 27(4). 483-486 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ohwatari N: "Thermotherapy for Neoplasia, Inflammation and Pain"Eds : KosakaM, Sugahara T, Schmidt K L & Simon E Springer-Verlag, Tokyo. 550 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Onwatari N: "Thermal Physiology 1997"Eds : Bodil Nielsen Johammsen, Ruth Nielsen The August Krogh Insitute. 426 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ohwatari N: "Depression of immunological ability by ultraviolet rays and protection from ultraviolet rays."Jpn J Trop Med. 28(1). 96-97 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Cao Y: "TGF-β1 mediates 70-kDa heat shock protein induction due to ultraviolet irradiation in human skin fibroblasts."Pflugers Arch-Eur J Physiol. 438. 239-244 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ohwatari N: "In : Thermotherapy for Neoplasia, Inflammation and Pain Eds.Kosaka M, Sugahara T, Schmidt K L & Simon E"Springer-Verlag, Tokyo. 550 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kosaka M: "In : Thermotherapy for Neoplasia, and Pain Eds.Kosaka M, Sugahara T, Schmidt K L & Simon E"Springer-Verlag, Tokyo. 550 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ohwatari N: "In : Thermal Physiology Eds.Nielsen Johannsen B, Nielsen R"Springer-Verlag, Mackeezie Copy Center, Copenhagen. 426 (1998)

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

URL: 

Published: 2002-03-26  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi