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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. 2016; 62(5): 83-90


THE PECULIARITIES OF ARGINASE PATHWAY OF L-ARGININE IN SPERMATOZOA IN MEN WITH DIFFERENT FORMS OF PATHOSPERMIA

R.V. Fafula, O.K. Onufrovych, U.P. Iefremova, D.Z. Vorobets, Z.D. Vorobets

    Danylo Halytsky Lviv National Medical University.
DOI: https://doi.org/10.15407/fz62.05.083

Abstract

The changes in arginase activity of spermatozoa and hormonal profile of peripheral blood of infertile men with various forms pathospermia have been studied. It has been found that arginase activity in the sperm cells of men with oligozoo-, antenozoo-, oligoastenozoo- and leucocytospermia is decreased in 2.1, 2.3, 2.4 and 3.3 times respectively. This indicates about inhibition of arginase pathway of L-arginine metabolism, which is not significantly dependent on the type of disruption of spermatogenesis. The most significant changes have been observed in infertile men with leucocytospermia since white blood cells stimulate the formation of reactive oxygen species, induction and development of oxidative and nitrative stress in spermatozoa. Inhibition of arginase pathway of L-arginine metabolism has adaptive role, which is to limit bioavailability of L-arginine and to prevent excessive formation of NO in cytotoxic concentrations to sperm cells. It has been noted changes in serum concentrations of gonadotropin and sex hormones in men with various forms of pathospermia. The most expressed significant changes were in levels of follicle stimulating hormone and testosterone. The concentration of follicle stimulating hormone in patients with oligozoospermia caused by hypogonadism is twice higher and in patients with leucocytospermia in 1.8 times higher than in fertile men. In patients with astenozoospermia this value is in 2.2 times lower than in normozoospermic samples but within the physiological norm. The testosterone level in men with oligozoospermia is in 1.6 times lower than in fertile men but within the physiological norm. It has been found that arginase inhibition of spermatozoa positively correlated with a decrease in their concentration in the ejaculate of infertile men with oligozoospermia (r = 0.68).

Keywords: arginase; nitric oxide; infertility in men.

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