Evaluation of Physiological Parameters of Intestinal Sulfate-Reducing Bacteria Isolated from Patients Suffering from IBD and Healthy People.

Background: Inflammatory bowel diseases (IBDs) are multifactorial illnesses of the intestine, to which microorganisms are contributing. Among the contributing microorganisms, sulfate-reducing bacteria (SRB) are suggested to be involved in the process of bowel inflammation due to the production of hydrogen sulfide (HS) by dissimilatory sulfate reduction. The aims of our research were to physiologically examine SRB in fecal samples of patients with IBD and a control group, their identification, the study of the process of dissimilatory sulfate reduction (sulfate consumption and HS production) and biomass accumulation.

Biological Significance of Glutathione S-Transferases in Human Sperm Cells.

Background: Oxidative stress is considered as one of the causes of male subfertility or infertility. Among antioxidant enzymes, the crucial role belongs to glutathione -transferases (GSTs). Data on the biological role of GSTs in the defense mechanisms of sperm cells in fertile and infertile men are limited.

Alterations in Arginase-NO-synthase System of Spermatozoa in Human Subjects with Different Fertility Potential.

Background: Infertility is an important worldwide problem which affects 10-15% of couples globally. Altered NO production has also been implicated in the pathogenesis of the male infertility. The present study was designed to evaluate the changes in the activity of NO-synthase (NOS) and arginase in spermatozoa of patients with infertility.