Expression of gene, protein and immunohistochemical localization of the estrogen receptor isoform ER alpha 1 in male rainbow trout lymphoid organs; indication of the role of estrogens in the regulation of immune mechanisms
Massart, S.; Milla, S.; Kestemont, P. (2014). Expression of gene, protein and immunohistochemical localization of the estrogen receptor isoform ER alpha 1 in male rainbow trout lymphoid organs; indication of the role of estrogens in the regulation of immune mechanisms. Comp. Biochem. Physiol. (B Biochem. Mol. Biol.) 174: 53-61. https://dx.doi.org/10.1016/j.cbpb.2014.06.001 In: Comparative Biochemistry and Physiology. Part B. Biochemistry and Molecular Biology. Pergamon: Oxford. ISSN 1096-4959; e-ISSN 1879-1107, more |  |
| Keywords | Oncorhynchus mykiss (Walbaum, 1792) [WoRMS]
Marine/Coastal | | Author keywords | Rainbow trout; Estrogen receptor; Immunity; Gene expression pattern;Immunohistochemistry |
| Authors | | Top | - Massart, S., more
- Milla, S.
- Kestemont, P., more
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| Abstract | In vertebrates, estrogens act on the reproductive system but also affect the functioning of non-reproductive tissues such as the immune system. In teleost fish, effects of estrogens and xenoestrogens have been reported extensively, but the available information on targeted tissues and cells is still scarce. Moreover, a better knowledge of the distinct ER subtypes is required to find out the mechanistic pathways by which estrogen compounds are able to disrupt endogenous estrogen signaling in fish immunity. The present study aimed at characterizing, in male rainbow trout juveniles, multi-tissue gene expression pattern of one isoform of estrogen receptor (ER), ERα1, at the mRNA and protein levels. The mRNA levels for ERα1 were measured in various lymphoid organs by real-time RT-PCR and ERα1 protein level by Western blot. Furthermore, this protein was located by immunohistochemistry in the same organs. The transcripts were ubiquitously expressed, but at a higher level in testis and liver, while the protein was more abundant in testis and skin. Moreover, the ERα1 was detected in endothelial, Kupffer, mucous and chloride cells, hematopoietic tissues, proximal tubule, epithelia of the skin and intestine, in the lamina propria and in the stratum granulosum. This distribution backs the idea that, in male rainbow trout, estrogeno-mimetic compounds could be involved in different immune mechanisms such as inflammatory response, transport of Ig, mucus production, regulation of cellular immunity and development and maturation of lymphoid and myeloid cells. |
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