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학술저널
저자정보
Okano, Keiko (Graduate School of Human Culture, Nara Women's University) Okano, Toshiyuki (Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo) Oishi, Tadashi (Graduate School of Human Culture, Nara Women's University) Fukada, Yoshitaka (Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo)
저널정보
한국광과학회 Journal of photoscience : an international journal officail organ of the korean society of photoscience Journal of photoscience : an international journal officail organ of the korean society of photoscience 제9권 제2호
발행연도
2002.1
수록면
255 - 257 (3page)

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In birds, the photoperiodic seasonal breeding involves encephalic photoreception at the initial step of triggering the well-known endocrinal cascade. Especially in Japanese quail (Coturnix coturnixjaponica), the reproductive neuroendocrine function responds to a single long day, and hypothalamic regions are known to be important for the reproductive response. However, little is known about where and how the light and time signals are integrated to detect daylength information and transduced to the endocrinal responses. To gain insights into this issue, we are interested in the c-Fos expression in the hypothalamus of the Japanese quail. Meddle and Follett (1997) previously identified two hypothalamic regions where c-Fos-like immunoreactivities were induced in response to a long day by using an antibody to carboxyl terminal region of human c-Fos (Lys$^{347}$ -Leu$^{367}$ ). In the present study, we used a different anti-c-Fos antibody recognizing a region from Lys$^{128}$ to Ala$^{152}$ of human c-Fos, and found in long-day- stimulated quails many c-Fos-like immunoreactive nuclei localizing within two regions, nucleus anterior medialis hypothalami and nucleus periventricularis hypothalami, which are distinct from those identified in the previous study. Then, we focused on the difference in the cross-reactivities of the antibodies used, and determined the whole coding sequence of quail c-Fos to compare the antigenic sequences of the two antibodies with the amino acid sequence of quail c-Fos. We found that the antibody we used would recognize quail c-Fos more specifically than that used in the previous study.

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