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

野生动物皮肤的紫外线透过性及紫外线引起的皮肤变性

基本信息

批准号：
11670073
负责人：
OHWATARI Nobu
金额：
$ 0.7万
依托单位：
Institute of Tropical Medicine, Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11670073/
关键词：
Environmental biology Wild mammals Ultraviolet rays (UV)Defense to UV Dermatopathy by UV Transmission rate of UV 環境因子環境生物学紫外線組織変性マウス細胞免疫液性免疫

项目摘要

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.

在地球上的生命一直在将防御功能获取到进化过程中的紫外线。哺乳动物的防御功能大致分为身体特征类型和Cutis组织特征类型。中国的皮卡，黄鼠，jird和亚洲花栗鼠的野生动物有两种颜色的体毛分层。在这项研究中，与Wistar大鼠的白发相比，身体头发的黑色下部吸收了明显的紫外线（UV）能量，并且身体头发的两种颜色结构具有有效的功能，可以有效地保护皮肤免受紫外线的特征。在紫外线诱导的皮肤组织中，野生动物与野生动物相比，野生动物与野生动物相比，野生动物与野生动物相比，相比之下。水肿，地壳形成和纤维化。在这些野生动物中，在紫外线渗透性期间通过表皮和居住中的紫外线强度识别出负相关性。每个物种中对紫外线的防御作用都不同地取决于居住中紫外线的强度，原因是每个物种的长度和头发密度的差异。环境因子的空气温度对于确定紫外线的防御形式以及紫外线强度很重要。因为长发会破坏热环境中的热量损失。例如，在沙漠附近居住的黄色老鼠上，头发长度很短，但是表皮较厚，以防御为防御，另一方面，防御能力的季节性变化在每个物种中没有统计学上的显着性。