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Hair loss on the back in Hatano rats during pubertal period: Relationship between hair loss and aggression

机译：波多野大鼠青春期背部脱发：脱发与攻击性的关系

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摘要

Hair loss on the back is usually found in the rodents. It is probably caused by stress, hormonal abnormalities, fighting, etc. Hatano high- and low-active avoidance (HAA and LAA) rats, which are selectively bred for avoidance behavior in a shuttle-box, are maintained in our institute. HAA rats often show hair loss on the back during pubertal period. Then, the frequency of hair loss on the back was investigated in the 1 and 2 animals/cage groups after weaning. Furthermore, play behavior test at 6-7 weeks of age and intruder tests at 10-11 weeks of age were carried out in male Hatano rats to evaluate relationship between hair loss and aggression. In the 2 animals/cage group, hair loss was found in more than 90% of male HAA rats and 11% of female HAA rats. In the 1 animal/cage group, hair loss was found in 38% of male HAA rats and 0% of female HAA rats. Hair loss was not found in LAA rats independent of housing conditions. In the observation of play behavior, frequency of play-fighting in HAA rats was higher than that in LAA rats. No strain difference to aggressiveness was observed in the intruder test. Since play-fighting was more frequently observed in HAA than LAA rats, the hair loss on the back in HAA rats was probably caused by the increased play-fighting. There was, however, no difference in aggressive behavior between HAA and LAA rats during the intruder test. Since hair loss occurred in male HAA rats under single conditions, further study is needed to evaluate relationship between hair loss and other factors, such as stress and immunological reaction on the skin.
机译：通常在啮齿动物中发现背部脱发。这可能是由于压力，荷尔蒙异常，打架等引起的。我们研究所维持着波多野高主动回避和低主动回避（HAA和LAA）大鼠的选择，这些大鼠是为了在回旋箱中回避行为而选择性繁殖的。 HAA大鼠在青春期通常会出现背部脱发。然后，在断奶后的1个和2个动物/笼子组中研究了背部脱发的频率。此外，在雄性波多野大鼠中进行了6-7周龄的游戏行为测试和10-11周龄的入侵者测试，以评估脱发与攻击性之间的关系。在两个动物/笼子组中，超过90％的雄性HAA大鼠和11％的雌性HAA大鼠发现脱发。在1个动物/笼子组中，在38％的雄性HAA大鼠和0％的雌性HAA大鼠中发现了脱发。独立于居住条件，在LAA大鼠中未发现脱发。在游戏行为的观察中，HAA大鼠中的搏斗频率高于LAA大鼠。在入侵者测试中未观察到应变与侵略性的差异。由于在HAA中比在LAA大鼠中更经常观察到打架，因此在HAA大鼠中背部脱发很可能是由打架的增加引起的。但是，在入侵者测试期间，HAA和LAA大鼠之间的攻击行为没有差异。由于脱发是在单一条件下在雄性HAA大鼠中发生的，因此需要进一步研究以评估脱发与其他因素（例如压力和皮肤免疫反应）之间的关系。

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  • 来源
    《Experimental Animals》 |2008年第3supa期|p.76|共1页
  • 作者

    Ryo OHTA; Shinji HORIUCHI;

  • 作者单位

    Hatano Research Institute, Food and Drug Safety Center;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 动物学;
  • 关键词

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