Sodium Hydrosulfide Exerts a Transitional Attenuating Effect on Spermatozoa Migration in Vitro.

Hydrogen sulfide (H2S) has been shown to have a prominent role in the regulation of reproductive system function and fertility. The aim of the study was to assess the effect of a H2S donor, sodium hydrosulfide (NaHS), on mouse sperm migration in vitro. Special plates with 4 corner wells filled with balanced salt solution (control) and various NaHS solutions in concentrations of 2.

Lack of TCRalphabeta+ CD8+ and TCRgammadelta+ lymphocytes ameliorates LPS induced orchitis in mice--preliminary histological observations.

The inflammation of the reproductive system can affect reproduction causing partial or complete infertility. It is well known that lipopolysaccharide (LPS) triggers an inflammatory response in the whole organism, including immunologically privileged organs, e.g.

[The parameters of ovarian reserve and their usefulness to assess the present and future woman's fertility].

It is well-known fact, that recently women decide to have a baby much later than previously. However after reaching 35 years old the woman's fertility reduces considerably. The effect of this phenomenon causes the increase of assisted reproductive technology (ART) treatment.

Histological changes in seminiferous epithelium in testis of male mice induced by injection of lipopolysaccharide (LPS).

LPS induces an inflammatory state which kmitates septic shock and which involves also an organ which is immunologically advantageous, namely testicle. Within an area of a gonad, this manifests itself by histological changes in the structure of germinal epithelium. The blockages of cell divisions lead also to disorders in the proportions of cells in particular stages of spermatogenesis, degeneration of germinal epithelium and the decrease of the number of spermatozoa in the lumen of seminiferous tubules.

[Neo-oogenesis, possibility of oryjgin of oocytes and primordial ovarian follicles in postnatal period in women].

The central dogma female reproductive biology has that oogenesis ceases around birth in mammals and human. The ovarian reserve of oocytes is definitely fixed and will deplete up to the menopause in women. The papers by Johnson et al.

Emil Godlewski, Jr. (1875-1944) pioneer of embryology at the Jagiellonian University of Krakow (Poland).

Emil Godlewski, Jr. (1875-1944) lived and worked in Krakow. He graduated from the Faculty of Medicine of the Jagiellonian University with the title of Doctor of Medical Science.

[The influence of soybean riches of phytoestrogens diet in mouse testis histological structure].

Soybean diet, a rich source of phytoestrogenes, affects negatively on the potential fecundity in male mice. It causes spermatogenesis impairment which is manifested by changes in testicular histology. Germ epithelium becomes darker and sheds and a number of produced spermatozoa decreases.

[Phytoestrogens: are they really safe?].

The aim of this article was to present a simple classification of phytoestrogens, their approximate content in food products as well as their synthesis, biotransformation and activity in human organism. Having various mechanisms of action, phytoestrogens display both beneficial and adverse effects on physiological processes. Several positive health effects have been associated with phytoestrogens, such as a protective role against the development of cancers, proestrogenic effects (particularly with postmenopausal women) and beneficial influence on cardiovascular and osseous systems.

[Chemotaxis of spermatozoa--an important and little known process accompanying fertilization].

The presented paper is the survey of the most important literature concerning one of the basic biological properties of spermatozoa which is their chemotaxis during the process of fertilization. During the recent years a significant progress in the knowledge of this matter has been observed, especially in relation to human and mammal spermatozoa. A natural chemotactic factor is, in the case of mammals, the vesicle fluid.

[The activation of oocyte development depends on a cytoplasmic chemical factor carried in by the sperm at the moment of fertilization].

The activation of the egg cell metabolism by the spermatozoon which connects with it upon the moment of fertilization may by the result of the influence of the membrane receptors of the gametes or of the presence of an activating factor in the spermatozoon's cytoplasm carried by the male gamete into ooplasm. The first reaction observed in the cytoplasm of the activated oocyte is the increase of the level of calcium ions which determines the activation of many cytophysiological processes. Currently, a prevailing opinion is that an undulating, oscillating increase of the level of Ca2+ is caused by the influence of the activating spermatozoon factor and does not depend on the membrane receptors.

Cytological and morphological differences between two species of the genus Tettigonia (Orthoptera, Tettigoniidae) from Korea.

Tettigonia ussuriana and T. dolichopoda maritima differ in the length of tegmina, details in venation, and in females in details of the subgenital plate. The two species of the genus Tettigonia have the same number and morphology of autosomes but a different morphology of the X chromosome: in T.