Sex Hormone Binding Globuling during an annual reproductive cycle in the hepatopancreas and ovary of pejerrey (Odontesthes bonariensis).
Gonzalez, A., Fernandino, J. I., Elisio, M., Chalde, T., Miranda, L. A., Hammond, G. L. and Somoza, G. M.
Instituto de Investigaciones Biotecnologicas-Instituto Tecnologico de Chascomus "Dr. Raul Alfonsin" (CONICET-UNSAM), Chascomus, Buenos Aires, Argentina.
Department of Cellular and Physiological Sciences. Faculty of Medicine. The University of British Columbia, British Columbia, Canada.
Instituto de Investigaciones Biotecnologicas-Instituto Tecnologico de Chascomus "Dr. Raul Alfonsin" (CONICET-UNSAM), Chascomus, Buenos Aires, Argentina. Electronic address: somoza@intech.gov.ar.
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.
General and Comparative Endocrinology 272: 52-56 (2019)