2024-03-28T17:55:58Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1901102021-11-12T11:53:25Zcom_10261_94com_10261_8col_10261_347
DIGITAL.CSIC
author
Espigares, F.
author
Rocha, Ana
author
Gómez, Ana
author
Carrillo, Manuel
author
Zanuy, Silvia
funder
European Commission
funder
Generalitat Valenciana
orcid
Espigares, F. [0000-0002-6122-9031]
orcid
Zanuy, Silvia [0000-0002-8231-8260]
2019-09-06T10:59:38Z
2019-09-06T10:59:38Z
2017-01
General and Comparative Endocrinology 240: 35-45 (2017)
0145-305X
http://hdl.handle.net/10261/190110
10.1016/j.ygcen.2016.09.007
1879-0089
http://dx.doi.org/10.13039/501100000780http://dx.doi.org/10.13039/501100003359
The onset of puberty is characterized by activation of the brain-pituitary-gonad axis. However, the molecular and endocrine mechanism involved in the process of puberty and the influence of environmental conditions, such as photoperiod signalling, are not well understood in fish. In this study, 1-year-old male European sea bass (Dicentrarchus labrax) were exposed to photoperiod manipulation in combination with size-sorting. Two treatment groups, a puberty accelerating photoperiod (AP) group and a continuous light (LL) group, were studied from August to February. Our results indicate that AP and LL are able to entrain the rhythms of both kiss1 and gnrh2 mRNA levels in the brain, while kiss2 and gnrh1 mRNA expression does not seem to be directly affected by the photoperiod, at least during testicular growth. It is likely that AP and LL photoperiod regimes affected both plasma Fsh and 11-KT profiles, which might explain, respectively, the phase shift and reduction of testes maturation seen under these conditions. We therefore hypothesize that the unbalanced production of this androgen regulated by circulating Fsh might be limiting the stimulation of germ cell proliferation in European sea bass males. In summary, our study establishes that photoperiod modulates the expression of kiss1 and gnrh2 in the forebrain-midbrain, which may be involved in the translation of the light stimulus to activate the reproductive axis.
eng
closedAccess
Kisspeptin
Gonadotropin-releasing hormone
Gonadotropins
Androgens
Photoperiod
Puberty
Teleost
Photoperiod modulates the reproductive axis of European sea bass through regulation of kiss1 and gnrh2 neuronal expression
artículo
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URL
https://digital.csic.es/bitstream/10261/190110/1/accesoRestringido.pdf
File
MD5
130b6a1612b95043830006aa6b1e01ca
15715
application/pdf
accesoRestringido.pdf