SUMMARYThe role of antisperm antibodies (ASA) in the aetiopathogenesis of varicocoele-related male infertility remains unclear. The objective of this study was to determine whether varicocoele is associated with antisperm immune response and whether this factor provides additional affect on male fertility. We performed a multicentral, prospective study that included the clinical examination of 1639 male subjects from infertile couples and 90 fertile men, the evaluation of the absolute and relative risks of immune infertility associated with varicocoele and the impact of the autoimmune response on the semen quality. The methods used were as follows: standard examination of seminal fluid according to WHO criteria; ASA detection in seminal fluid using mixed antiglobulin reaction (MAR) and direct flow cytometry; measurement of spontaneous and ionophore-induced acrosome reactions; oxidative stress evaluation with luminal-dependent chemiluminescence method and evaluation of DNA fragmentation by sperm chromatin dispersion. The prevalence of varicocoele-related immune infertility is about 15% and does not depend on the grade of vein dilatation both in primary and secondary fertility disorders. Varicocoele is not an immediate cause of autoimmune reactions against spermatozoa, but is a cofactor increasing ASA risk; the OR of immune infertility after a testicular trauma in varicocoele patients increases twofold. In varicocoele patients, the autoimmune antisperm reaction is accompanied by a more significant decrease in the semen quality (concentration and number of progressively motile and morphologically normal spermatozoa in the ejaculate), acrosome reaction disorders (presence of pre-term spontaneous and lack of induced reactions) and an increase in the proportion of spermatozoa with DNA fragmentation. These disorders correlate with the level of sperm oxidative stress; reactive oxygen species (ROS) production in ASA-positive varicocoele patients is 2.8 and 3.5 times higher than in ASA-negative varicocoele patients and fertile men respectively. We did not find correlation between the grade of spermatic cord vein dilatation and ROS production.
In recent years we have encountered a big issueunderflooding in large cities and settlements, railroads' and highways' locations. In order to prevent and liquidate the consequences of underflooding during the design of engineering structures, it is necessary to carry out engineering surveying, which will help to obtain parameters of soil filtration (drainage bedding in underflooded areas, etc.). The article presents a methodology for determining the filtration parameters of drainage bedding (the Korchevskaya methodology), which allows to simplify the method of obtaining and processing feed data. In these studies, sand was used as a drainage bedding and the coefficients of filtration, lack of saturation and water loss were determined. This methodology allows obtaining the filtration parameters that are necessary for predictive estimates of underflooding of lands with various purposes and designing engineering structures, when performing elementary experiments, such as pouring water into the studied rocks of different compositions. The developed methodology allows you to automate the calculation using information systems.
Purpose of the study: to evaluate the effectiveness and safety of IVF/ICSI program for couples with HIV infected men.Research and methods. Prospective clinical study was applied to 169 infertile married couples. The main group of subjects was 94 couples with HIV infected men. The control group included 75 couples with HIV negative status for both partners. In the main group there were carried out 60 treatment IVF/ICSI cycles and 31 frozen protocols, in the control group 86 and 39 cycles respectively. Before the Assisted Reproductive Technology (ART) was applied to the HIV infected men they were tested for DNA HIV in purified spermatozoa by PCR method. To evaluate the seroconversion in 21 days following the embryo transfer the women were tested for the presence of an antigen/antibodies to the HIV virus.Results. Clinical pregnancy rate [6 (19,4%) and 17 (27%); p=0,41] as well as birth rate [5 (16,1%) and 11 (17,5%); p=0,87] in couples with HIV infected male was comparable to the control group. The testing of semen samples showed no RNA HIV in 100% cases. Evaluation of seroconversion showed absolutely no antibodies to HIV in the women’s blood in 100% cases.Conclusion. Implementation of the IVF/ICSI program for discordant married couples with HIV infected male showed the rate of pregnancy onset which is comparable to the HIV seronegative control. Ejaculate processing of HIV infected male using «double» gradient and swim up is turns to be the measure to prevent horizontal transmission of the virus. This method can be recommended when implementing ART for couples with HIV infected male, both in the case of infertility and according to epidemiological indications.
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