Effects of seawater acclimation on mRNA levels of corticosteroid receptor genes in osmoregulatory and immune systems in trout
General and Comparative Endocrinology
By: T. Yada, S. Hyodo, and C.B. Schreck
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Abstract
Influence of environmental salinity on expression of distinct corticosteroid receptor (CR) genes, glucocorticoid receptor (GR)-1 and -2, and mineralcorticoid receptor (MR), was examined in osmoregulatory and hemopoietic organs and leucocytes of steelhead trout (Oncorhynchus mykiss). There was no significant difference in plasma cortisol levels between freshwater (FW)- or seawater (SW)-acclimated trout, whereas Na+, K+-ATPase was activated in gill of SW fish. Plasma lysozyme levels also showed a significant increase after acclimation to SW. In SW-acclimated fish, mRNA levels of GR-1, GR-2, and MR were significantly higher in gill and body kidney than those in FW. Head kidney and spleen showed no significant change in these CR mRNA levels after SW-acclimation. On the other hand, leucocytes isolated from head kidney and peripheral blood showed significant decreases in mRNA levels of CR in SW-acclimated fish. These results showed differential regulation of gene expression of CR between osmoregulatory and immune systems. ?? 2008 Elsevier Inc. All rights reserved.
Suggested Citation
Yada, T., Hyodo, S., and Schreck, C., 2008, Effects of seawater acclimation on mRNA levels of corticosteroid receptor genes in osmoregulatory and immune systems in trout: General and Comparative Endocrinology, v. 156, no. 3, p. 622-627, https://doi.org/10.1016/j.ygcen.2008.02.009.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Effects of seawater acclimation on mRNA levels of corticosteroid receptor genes in osmoregulatory and immune systems in trout |
| Series title | General and Comparative Endocrinology |
| DOI | 10.1016/j.ygcen.2008.02.009 |
| Volume | 156 |
| Issue | 3 |
| Year Published | 2008 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | General and Comparative Endocrinology |
| First page | 622 |
| Last page | 627 |