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Gen Comp Endocrinol. 2019 Feb 1;272:52-56. doi: 10.1016/j.ygcen.2018.11.010. Epub 2018 Nov 19.

Sex hormone binding globulin during an annual reproductive cycle in the hepatopancreas and ovary of pejerrey (Odontesthes bonariensis).

Author information

1
Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín" (CONICET-UNSAM), Chascomús, Buenos Aires, Argentina.
2
Department of Cellular and Physiological Sciences, Faculty of Medicine, The University of British Columbia, British Columbia, Canada.
3
Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús "Dr. Raúl Alfonsín" (CONICET-UNSAM), Chascomús, Buenos Aires, Argentina. Electronic address: somoza@intech.gov.ar.

Abstract

In the present study, we determined the hepatopancratic shbg transcript abundance and ovarian immunoreactive Shbg (ir-Shbg) localization in pejerrey females at different gonadal stages during an annual ovarian cycle. In the hepatopancreas, shbg expression remains was constant in pre-vitellogenic stages, decreased at final vitellogenesis to increase again in final maturation and atretic stages to previous levels at post-vitellogenic stages. Related to this, also we found a negative significant relation between sex steroid and shbg expression. On the other hand, in the ovary we found ir-Shbg inside of cortical alveoli, from previtellogenic stages to final maturation. This localization of Shbg in a teleost fish ovary suggests a new role for Shbg in oocytes, that may also extend the oocyte fertilization/development process.

KEYWORDS:

Gonadal cycle; Ovary; Pejerrey; Sex hormone binding globulin; Sex steroids

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