Fos expression induced by warming the preoptic area in rats

Kyoko Yoshida, Megumi Maruyama, Takayoshi Hosono, Kei Nagashima, Yutaka Fukuda, Ruediger Gerstberger, Kazuyuki Kanosue

研究成果: Article

37 引用 (Scopus)

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The preoptic area (POA) occupies a crucial position among the structures participating in thermoregulation, but we know little about its efferent projections for controlling various effector responses. In this study, we used an immunohistochemical analysis of Fos expression during local warming of the preoptic area. To avoid the effects of anesthesia or stress, which are known to elicit Fos induction in various brain regions, we used a novel thermode specifically designed for chronic warming of discrete brain structures in freely moving rats. At an ambient temperature of 22°C, local POA warming increased Fos immunoreactivity in the supraoptic nucleus (SON) and the periaqueductal gray matter (PAG). Exposure of animals to an ambient temperature of 5°C induced Fos immunoreactivity in the magnocellular paraventricular nucleus (mPVN) and the dorsomedial region of the hypothalamus (DMH). Concurrent warming of the POA suppressed Fos expression in these areas. These findings suggest that thermal information from the preoptic area sends excitatory signals to the SON and the PAG, and inhibitory signals to the mPVN and the DMH.

元の言語English
ページ(範囲)109-117
ページ数9
ジャーナルBrain Research
933
発行部数2
DOI
出版物ステータスPublished - 2002 4 19
外部発表Yes

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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