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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)
DOI: https://doi.org/10.15407/fz

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2012; 58(3): 3-8


The dynamics of hormonal changes in female rats exposed to chronic stress and androgenexcess during pubescence

N.D. Nosenko, L.V. Tarasenko, P.V. Sinitsyn, O.V. Sachinskaya, I.Yu. Ganzhiy, A.G. Reznikov

    V.P. Kommissarenko Institute of Endocrinology and Metabolism, National Academy of Medical Sciences of Ukraine, Kyiv;Zaporozhye State Medical Academy for Postgraduate Education, Zaporozhye


Abstract

The dynamics of blood plasma corticosterone, testosterone and androstenedione levels and their reaction to acute stress (30 min immobilization) in 35-, 40- and 45-day old female rats exposed to chronic stress (daily 30-min immobilization from 35th to 45th day of life) and/or to excess of exogenous androgens (implantation of capsules with testosterone to 33-day old animals) during pubescence was studied. Both control and experimental females in all age groups responded to acute stress by signifcant elevation of blood plasma corticosterone levels. At the end of the chronic stress session, the extent of adrenals activation in response to acute dosed stress was lowered in androgenized 45-day old females and increased gradually in stressed ones. After acute stress, the blood plasma testosterone level decreased in control 35-day old females and rose – in androgenized females against 10-fold rising of basal hormonal level. In 40-day old control females as well as in androgenized ones exposed to chronic stress during 5 days, the acute dosed stress did not result in signifcant changes of blood plasma testosterone and elevated blood plasma androstenedione. Stressed 40-day old females with increased basal androstenedione secretion did not respond to acute stress by the hormone level changes while blood plasma testosterone declined signifcantly. At the end of pubescence (on the 45th day of life), acute stress did not affect the blood plasma testosterone level in control and androgenized animals, while decreased it in stressed females and increased – in androgenized rats exposed to chronic stress against elevated basal level of the hormone. The conclusion is made about possible functional relationship between the changes in hormonal homeostasis during pubescence and development of reproductive system in mature animals.

Keywords: chronic stress, androgen excess, pubescence, steroid hormones, female rats.

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© National Academy of Sciences of Ukraine, Bogomoletz Institute of Physiology, 2014-2019.