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Effects of cortisol and angiotensin II on the number and size of juxtaglomerular cells in masu salmon, Oncorhynchus masou

Fish Physiology and Biochemistry volume 25, pages 249–254 (2001)Cite this article

Abstract

The authors previously reported that the number and size of juxtaglomerular cells (JGCs) in the kidney increased during smoltification in masu salmon, Oncorhynchus masou. In the present study, the effects of cortisol and/or angiotensin (Ang) II ([Asn1, Val5]-Ang II) on the JGC number and size in masu salmon were examined to elucidate hormonal regulation of the changes in the JGC number and size during smoltification. These hormones were injected intraperitoneally every 2 days for a total of 6 injections. There was a significant increase in the JGC number and size with time following the start of the experiment in cortisol- and cortisol + Ang II-treated groups and no significant change in control and Ang II-treated groups. On both days 5 and 11, the JGC number and size in the cortisol-treated group were significantly large compared to those of control and Ang II-treated groups, respectively. The JGC number and size in the cortisol + Ang II-treated group were significantly large compared to those of control on both days 5 and 11, and those of the Ang II-treated group only on day 11, respectively. On the other hand, there was no significant difference in the JGC number and size between the Ang II-treated and control groups and between the cortisol- and cortisol + Ang II-treated groups during the experiment, respectively. The means of the JGC number and size in cortisol-treated group on day 11 were close to those previously reported in smolt. These results suggest that cortisol induces an increase in JGC number and size during smoltification in masu salmon.

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Authors and Affiliations

  1. Erimo Research Branch, Hokkaido Fish Hatchery, 434-1 Utabetsu, Erimo, Hokkaido, 058-0202, Japan

    S. Mizuno, N. Misaka & N. Kasahara

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  1. S. Mizuno
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  2. N. Misaka
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  3. N. Kasahara
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Mizuno, S., Misaka, N. & Kasahara, N. Effects of cortisol and angiotensin II on the number and size of juxtaglomerular cells in masu salmon, Oncorhynchus masou . Fish Physiology and Biochemistry 25, 249–254 (2001). https://doi.org/10.1023/A:1022274327140

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  • DOI: https://doi.org/10.1023/A:1022274327140

  • angiotensin II
  • cortisol. juxtaglomerular cell
  • masu salmon

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