Kogan Igor

• Medical Doctor at The Research Institute of Obstetrics, Gynecology and Reproductology named after D.O.Ott

In the present study, we aimed to investigate intratumoral karyotype diversity as well as the estrogen/progesterone effect on the cytogenetic profile of uterine leiomyomas (ULs). A total of 15 UL samples obtained from 15 patients were cultured in the media supplemented with estrogen and/or progesterone and without adding hormones. Conventional cyto...

Genetic constructs must be delivered selectively to target tissues and intracellular compartments at the necessary concentrations in order to achieve the maximum therapeutic effect in gene therapy. Development of targeted carriers for non-viral delivery of nucleic acids into cells, including those in muscle, which is one of the most challenging tis...

Communication between natural killer cells (NK cells) and monocytes/macrophages may play an important role in immunomodulation and regulation of inflammatory processes. The aim of this research was to investigate the impact of NK cell-derived large extracellular vesicles on monocyte function because this field is understudied. We studied how NK-cel...

Background and Aims: Despite keen development of ART, recurrent implantation failure (RIF) remains a challenging dilemma for fertility specialists. As it contains significant growth factors involved in delicate process of implantation, platelet–rich plasma (PRP) therapy should promote endometrial receptivity and improve ART. Objective: To evaluate...

Spinal muscular atrophy 5q (SMA) is one of the most common neuromuscular inherited diseases and is the most common genetic cause of infant mortality. SMA is associated with homozygous deletion of exon 7 in the SMN1 gene. Recently developed drugs can improve the motor functions of infants with SMA when they are treated in the pre-symptomatic stage....

Objective. To determine the correlation between fatty acid (FA) levels in follicular fluid (FF) and outcomes of assisted reproductive technology (ART) programs depending on body mass index (BMI). Patients and methods. A total of 120 patients with infertility undergoing ART protocols were divided into three groups: normal BMI (group 1; n = 40), over...

Study question To evaluate if the intrauterine perfusion with autologous PRP enhances frozen-thawed embryo transfer effectiveness in patients with recurrent implantation failure (RIF) after PGT-A. Summary answer The intrauterine perfusion (IP) with autologous PRP should be considered perspective, effective and safe therapeutic tool for patients wi...

Spinal muscular atrophy 5q (SMA) is the most common neuromuscular inherited disease in neonates which is associated with homozygous deletion of exon 7 in the SMN1 gene. Recently established drugs can improve the motor functions of SMA infants when treated in the pre-symptomatic stage. With aim of providing an early diagnosis, newborn screening (NBS...

Angiogenesis is the development of new blood vessels from pre-existing ones. It is a complex multifaceted process that is essential for the adequate functioning of human organisms. The investigation of angiogenesis is conducted using various methods. One of the most popular and most serviceable of these methods in vitro is the short-term culture of...

Introduction. Chronic endometritis is one of the most frequent gynecological diseases which negatively impacts the main pathogenetic links in the morphogenesis of secretory and gestational endometrial transformation. These links determine implantation failure. The study aimed to verify the expression of estrogen receptors (ER) and progesterone rece...

Currently, one of the most promising areas of medicine is the development and implementation of new biomedical technologies in the field of human reproduction with the involvement of resources of biobanks and biocollections as well as modern genetic technologies. In this review, we considered the key dimensions of personalized medicine, such as bio...

Introduction . Habitual pregnancy failure (HPF) has long been a pressing problem of modern medicine and is characterized by multiple pathogenetic mechanisms of early pregnancy termination. The aim of the study was to examine the expression of estrogen, progesterone, progesterone-induced blocking factor and stromal cell factor-1 receptors in endomet...

BACKGROUND: At present, the knowledge on initial human embryogenesis stages is limited to the period of development from zygote to blastocyst. The creation of models based on the interaction between the embryo and endometrium in vitro, which accurately imitate the in vivo processes, represents the major way for implantation and post-implantation ev...

This paper suggests an approach for the use of a single paucicellular histological sample to investigate two characteristics indicative of the cell’s functional potential: 1) the content of telomerase reverse transcriptase (TERT) and 2) the telomere length. An algorithm has been suggested for the successive detection of the catalytic telomerase sub...

Иммуноглобулины для внутривенного введения (ВВИГ) применяют в терапии бесплодия. Предполагается влияние ВВИГ на цитотоксическую функцию NK-клеток, однако механизм действия ВВИГ остается неясным. Цель: Оценка влияния препарата ВВИГ на цитотоксичность NK-клеток в отношении клеток-мишеней линии К-562 и клеток трофобласта линии JEG-3. Материалы и метод...

BACKGROUND: Cell therapy is a promising trend in treating characterized by inflammation and sclerosis diseases such as genital tuberculosis, marked by pelvic inflammatory disease and uterine tube occlusion. AIM: Efficacy evaluation of combined mesenchymal stem cells and specific polychemotherapy treatment of the experimental genital tuberculosis. M...

During pregnancy, uterine NK cells interact with trophoblast cells. In addition to contact interactions, uterine NK cells are influenced by cytokines, which are secreted by the cells of the decidua microenvironment. Cytokines can affect the phenotypic characteristics of NK cells and change their functional activity. An imbalance of pro- and anti-in...

BACKGROUND: According to most studies, the efficacy of IVF/ICSI protocols in patients with suboptimal response was significantly lower than in women with normal response. However, methodological approaches optimizing the efficacy of IVF/ICSI protocols in patients with suboptimal response have not been developed. AIM: The aim of this study was to ev...

Introduction. Demographic decline is one of the main challenges to modern society. Thus, the problem of early pregnancy loss retains medical and social significance regardless of the way of conception. The endometrium continues to be an underestimated component in the reproduction process, while studies ofthe gravid endometrium are few. The aim of...

According to reports, the efficiency of IVF/ICSI protocols is decreased in antithyroid antibodypositive patients as opposed to antibody negatives. However, there are opposite data indicating the absence of the antibody’s impact on the outcome of infertility treatment with assisted reproductive technologies. The prospective study enrolled 90 patient...

Natural killer cells (NK cells) are innate immunity lymphocytes. NK cell differentiation is controlled by the cellular microenvironment and locally produced cytokines, including IL-2, IL-15 and IL-18. NK cells are present in various tissues, forming pools of tissue-resident NK cells, e.g., decidual NK cell pool. Peripheral blood NK cells (pNK cells...

Investigation objective IVF protocol efficacy estimation in women with expected suboptimal response depending on ovary stimulation mode. Materials and technique A randomized controlled study embracing results of 51 IVF cycle in women with ovary suboptimal response. The suboptimal response prognostic analysis was performed basing on ≤9 oocyte cumul...

Introduction Adipokines are involved in the regulation of the female reproductive system. The purpose was to study the possibility of using adipokines levels in the follicular fluid to predict IVF efficiency. Materials and methods Four groups of women were studied: pregnant during IVF, with normal (PN, n = 9) and increased (BMI > 25 kg/m²) body we...

BACKGROUND: Uterine anomalies are a cause of female reproductive failure. Originally, malformations of the Mllerian ducts are believed to be the main reason for uterus abnormalities. There is an assumption that anti-Mllerian hormone (AMH) or AMH receptor (AMHR2) gene mutation may lead to alterations in the formation of the Mllerian ducts in female...

Caesarean section is the most common surgical intervention over the world, so the development of the enhanced recovery after cesarean delivery is turning out to be a vital problem. The practical application of the enhanced recovery after cesarean requires multidisciplinary collaboration and well-coordinated teamwork of an anesthesiologist, an obste...

We performed a comparative cytogenomic analysis of cultured and uncultured uterine leiomyoma (UL) samples. The experimental approach included karyotyping, aCGH, verification of the detected chromosomal abnormalities by metaphase and interphase FISH, MED12 mutation analysis and telomere measurement by Q-FISH. An abnormal karyotype was detected in 12...

BACKGROUND: Despite numerous studies of the vaginal microbiota, there is still a lack of knowledge regarding its restoring dynamics in the early postpartum period. The condition of the vaginal microflora during pregnancy plays a key role in maintaining the physiological microbiocenosis of the birth canal and creating conditions for the normal cours...

Aim. To study a stress-protective efficacy of micronized progesterone (MP) in pregnant women with anxiety disorders after in vitro fertilisation (IVF). Materials and methods. We conducted a prospective, comparative open-label randomized trial in two IVF-clinics. A total of 98 pregnant women after IVF with anxiety disorders were recruited at the 9t...

BACKGROUND: The uterine junctional zone is the inner part of the myometrium. Dysfunction of the zone may underlie the pathogenesis of adenomyosis and its clinical manifestations, while biometric characteristics of the zone are currently considered as promising early diagnostic criteria for this disease. Adenomyosis has traditionally been associated...

Study question Can the adipokines levels and ratios in the follicular fluid (FF) be used to predict in vitro fertilization (IVF) outcomes? Summary answer The leptin level and ratios leptin/ghrelin and leptin/adiponectin in FF are reliable prognostic factors for IVF outcomes in women with normal body mass index (BMI). What is known already The adi...

The human lifespan is strongly influenced by telomere length (TL) which is defined in a zygote—when two highly specialised haploid cells form a new diploid organism. Although TL is a variable parameter, it fluctuates in a limited range. We aimed to establish the determining factors of TL in chromosomes of maternal and paternal origin in human tripl...

Clinical tests based on whole-genome sequencing are generally focused on a single task approach, testing one or several parameters, although whole-genome sequencing (WGS) provides us with large data sets that can be used for many supportive analyses. In spite of low genome coverage, data of WGS-based non-invasive prenatal testing (NIPT) contain ful...

Hypothesis/aims of study: Infection of the amniotic cavity and placenta is one of the leading causes of adverse pregnancy outcomes. In the majority of cases, intra-amniotic infection is associated with the normal microbiota of the lower urogenital tract. The aim of the study was to explore the relationships between the placental inflammatory change...

Hypothesis/Aims of study: According to the number of oocytes retrieved in IVF/ICSI protocols, the ovarian response to controlled ovarian stimulation is divided into: poor (03 oocytes), suboptimal (49 oocytes), normal (1015 oocytes) and excessive (15 oocytes) response. However, the effectiveness of IVF / ICSI programs in women with a suboptimal resp...

The novel coronavirus infection (COVID-19), first reported in Wuhan, China in December 2019, is dangerous for pregnant women, and the probability of infection is the same as in the general population. COVID-19 may be transmitted from person to person through two different routes: airborne and direct contact. Diagnosis of COVID-19 requires the detec...

Hypothesis/Aims of study. Currently, the frequency of suboptimal response (4-9 retrieved oocytes) to controlled ovarian stimulation (COS) in woman is quite high; however, its efficacy is poorly studied. The aim of this study was to evaluate the main characteristics of IVF / ICSI programs in patients with a suboptimal response to COS. Study design,...

We studied the impact of age and the serum anti-Müllerian hormone (AMH)/follicle-stimulating hormone (FSH) levels on the number of cumulus–oocyte complexes (COCs) retrieved from female reciprocal and Robertsonian translocation carriers after controlled ovarian hyperstimulation (COH). The number of COCs retrieved after COH was retrospectively analyz...

Hypothesis/aims of study. The hypoplastic endometrium has a significant negative impact on the probability of pregnancy and is one of the adverse factors influencing on the effectiveness of assisted reproductive technology (ART) protocols. Violation of the structural and functional characteristics of the endometrium associated with hypoplasia leads...

Hypothesis/aims of study. To date, one of the most important avenues of research in the field of reproductive medicine is the searching for new biochemical markers of oocyte quality and the prediction of the effectiveness of in vitro fertilization (IVF) protocols. The aim of this study was to assess the effect of relaxin levels in blood serum and f...

Hypothesis/aims of study. Overcoming infertility and miscarriage in adenomyosis is a complex practical problem in obstetrics and gynecology. It is likely that one of the signs of the disease is a thickening of the transitional zone between the endometrium and the myometrium (J-zone), which can be visualized using magnetic resonance imaging (MRI). T...

Objective The present study was to estimate the role of cytokines for trophoblast death in NK cells presence. Methods This study involves assessment of NK-92 line NK cell cytotoxic activity against JEG-3 line cells, in presence of cytokines. We also assessed the effect of secretory placenta products on NK cell cytotoxic activity toward JEG-3 line...

Objective The present study was to find a pathogenic evidence for dopamine agonist application in patients with endometriosis associated pain syndrome. Patients and technique The study involved 227 patients of reproductive age with histologically confirmed genital endometriosis (GE) of I–III degree according to ASRM classification. The control gro...

Objective Human leukocyte antigen-G (HLA-G) is a molecule that was first known to confer protection to the fetus from destruction by the immune system of its mother. HLA-G expression is mainly restricted to the fetal–maternal interface on the extravillous cytotrophoblast, placenta, amnion. Methods: The purpose of this study is to investigate the H...

The unique physical properties considered of graphene to be especially perspective for photothermal therapy complex, drug address delivery to the target organs, and some other fields. Objective The objective of our study was to explore the possible graphene impact on microorganism growth as well as on laboratory animal overall condition. Materials...

Objectives In March 2020, the World Health Organization declared that an infectious respiratory disease caused by a new severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2, causing coronavirus disease 2019 (COVID-19)] became a pandemic. In our study, we have analyzed a large publicly available dataset, the Genome Aggregation Database (gnomA...

Objectives: In March 2020, the World Health Organization declared that an infectious respiratory disease caused by a new severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2, causing coronavirus disease 2019 (COVID-19)] became a pandemic. In our study, we have analyzed a large publicly available dataset, the Genome Aggregation Database (gnom...

The review article presents an analysis of the literature over the past 10 years on the relationship of menopausal hormone therapy and the risks of developing malignant diseases in women, including risk factors, such as mutations in the BRCA1/2 genes. The main limiting factor in the appointment of menopausal hormone therapy today remains the questi...

Hypothesis/aims of study. The management of poor responders to ovarian stimulation for in vitro fertilization (IVF) has always been a challenge. It is difficult for both doctors and patients to make decision to proceed to oocyte donation or abandon fertility treatment. More predictors of successful IVF treatment in poor responders are needed. The a...

Hypothesis/aims of study. Poor ovarian response is still considered one of the most challenging tasks in reproductive medicine. Poor responders have decreased circulating androgens during spontaneous cycles. Androgens are known to play an important role in follicular growth and development. Hence, the use of various androgens and androgen inhibitor...

We report on the phenotype and the reproductive history of an adult female patient with an unbalanced karyotype: 8p23 and 18p11.3 terminal deletions and 8p22 duplication. The indication for karyotyping of the 28-year-old patient was a structural rearrangement in her miscarriage specimen: 45,ХХ,der(8;18)t(8;18)(p23;p11.3). Unexpectedly, the patient...

The goal of the study was to estimate the efficacy of growth hormone (GH) co-treatment to the antagonist protocol in IVF/ ICSI cycles in poor responders. A prospective observational study involved 75 patients. All patients underwent standard antagonist protocol with or without GH co-treatment. GH additional was given a daily subcutaneous injection...

Experimental embryology achievements in the century resulted in the birth of the first child conceived artificially. Besides its obvious social significance, the successful solution of the “test-tube babies” provided also the unique chance for direct inspection of human embryos growing in vitro at their earlier stages. New technologies applied for...

The contemporary world despite its enough developed medicine and generally highly enlightened population faces a great problem of vitamin, micro-element and nutrient deficiency turning to become the XXI century pandemic. Along with that significant growth of interest can be seen towards vitamin D importance for reproductive physiology. The fact is...

Study question: Does past or persistent chlamydial infection affect the response to controlled ovarian stimulation in women with tubal factor infertility undergoing in vitro fertilization (IVF)? Summary answer: IgG-antibody positivity to C.trachomatis, as serological evidence of past infection, is associated with both ‘expected’ and actual poor ova...

Hypothesis/aims of study. The ongoing global problem of health care and medical science is an associated increase in the frequency of endocrine and metabolic diseases and cancer, including in women of childbearing age. Thus, the frequency of diabetes in the population has been growing rapidly for many years. Similar trends were observed in the dyna...

Structural transformation of the endometrium during the menstrual cycle is a genetically determined process and is provided by complex molecular-biological interactions aimed at the onset and development of pregnancy. Sex steroid hormones play a key role in endometrial morphogenesis, which mediate or directly affect angiogenesis and immunogenesis.

Granulocyte colony-stimulating factor (G-CSF) promotes proliferation, survival, and differentiation of myeloid-lineage cells, as well as normal hematopoietic cells. The immunomodulating effects of G-CSF, which consist in stimulating the Th2 biased type immune response, prevent the development of graft-versus-host disease (GvHD) and, as a special ca...

Microvesicles are a new field of biological research. They are subcellular structures ranging in size from 100 to 1000 nm and found in practically all human biological fluids. Their sources are different cells. Microvesicles have a diverse internal composition and carry a wide spectrum of mol-ecules on their surface, which determines their particip...

Microvesicles are a new field of biological research. They are subcellular structures ranging in size from 100 to 1000 nm and found in practically all human biological fluids. Their sources are different cells. Microvesicles have a diverse internal composition and carry a wide spectrum of molecules on their surface, which determines their participa...

Some patients with type 1 diabetes have anovulation, tubal occlusion, male factor and other causes of infertility which require IVF procedure. We examined 20 women with type 1 diabetes, in which pregnancy occurred as a result of ART, at the stage IVF protocol planning, during pregnancy course and delivery. One of the patients underwent IVF procedur...

Background. According to WHO data (2014), more than two billion people are deficient in microelements or have a “hidden hunger” due to the deficiencies of vitamins and minerals. Currently, experts estimate the vitamin D deficiency as a new type of pandemic of the XXI century. Aim. The current analysis was undertaken to evaluate the effect of vitami...

Background. The pathogenesis of diabetic mastopathy is unknown. It is assumed that one of the important factors in the development of this disease may be hyperglycemia. The aim of this study was to evaluate the clinical manifestations and echographic features of the mammary gland structure in women with diabetes mellitus type 1. Materials and metho...

Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in women of reproductive age. Patients with PCOS present with several endometrial abnormalities possibly explaining some of the adverse endometrium-related outcomes in these women. PCOS is inconsistently associated adverse pregnancy outcomes and an increased risk of endometrial...

At the present time, a broad spectrum of CD8+ T lymphocyte subsets is revealed, including naïve cells, memory cells and regulatory subpopulations. Along with cells with high cytolytic activity, some subsets with marked regulatory activity were found there. Each subpopulation is characterized by a set of produced mediators, surface and intracellular...

A little studied question is the development mechanism, timely diagnostics, treatment and prevention of the fibrocystic breast disease at patients with insulin resistance. One of the possible perspective directions of pathogenetic impact on tissues of a mammary gland at the mastopathy associated with a giperinsulinemiya and insulin resistance is us...

The immunofluorescent study of genomic distribution of 5-formylcytosine and 5-carboxylcytosine in human preimplantation development – from the zygote up to the blastocyst stage – suggests a timeline of epigenetic reprogramming of the chromatin regions with different structure and functions.

NK cells present in different organs differ by their functional characteristics, in particular, proliferative activity. For studying tissue-resident NK cells, tissue-specific microenvironment should be reproduced. In case of decidual NK cells, this microenvironment is created by trophoblast cells. We developed a method for evaluation of proliferati...

Poster Discussion Session

The necessity for comprehensive assessment of endometrial morphology and function in women with repeated IVF failure along with the lack of the non-invasive assessment methods oblige us to perform an invasive intrauterine procedure to get endometrial samples. However, even the minimally invasive intrauterine procedures carry a slight risk of infect...

Background. Pelvic inflammatory disease (PID), including chronic endometritis (CE), is a factor leading to endometrial receptivity disorder and in vitro fertilization (IVF) failures. The role of microorganisms in colonizing the endometrium, the pathogenesis of chronic inflammation, and associated infertility require further study. Aims: To determin...

The purpose of the study. To determine the main indicators of the effectiveness of IVF programs in over-weight and obese patients. Based on the Research Institute of obstetrics, gynecology, and reproductology D.O. Ott, we conducted an analysis involving women aged 18–39 years who were treated in the IVF program in the department of assistive techno...

Introduction. Cytochrome P450 aromatase is a key enzyme in the biosynthesis of estrogens from androgens. Some gynecological diseases are accompanied with changes in the activity of ovarian aromatase. Moreover, changes in the acti vity of ovarian aromatase are associated with the response to standard gonadotrophin stimulation in women undergoing in...

Preimplantation genetic testing performed to analyze the chromosomal structural rearrangements, monogenic/single gene defects and aneuploidies. The aim of this study is to show the discussion of a clinical case of preimplantation genetic testing in the family of SMN1 gene mutation carriers with the subsequent birth of a healthy child. (For citation...

Context: Worldwide clinical application of blastocyst cryopreservation is explained by relatively high pregnancy rates, but is as well associated with cycle cancellation due to reduced embryo quality or failure of blastulation. At the stage of morula embryo requires less technical manipulations during cryopreservation process, thus, might have bett...

Context: Worldwide clinical application of blastocyst cryopreservation is explained by relatively high pregnancy rates, but is as well associated with cycle cancellation due to reduced embryo quality or failure of blastulation. At the stage of morula embryo requires less technical manipulations during cryopreservation process, thus, might have bett...

Context: Stem cells homing, the process of stem cells (SC) delivery to the site of injury, is one of the key aspect of cell-based therapies. А competitive tropism of SC to different tissues complicates our understanding of the mechanisms of the site-specific SC recruitment and precludes the process management for therapeutic purposes. Objective: To...

To estimate the efficacy of growth hormone (GH) co-treatment within an antagonist protocol in IVF/ICSI cycles in poor responders. A prospective observational study involving 50 patients underwent a standard antagonist protocol with or without GH co-treatment. GH was administered by a daily subcutaneous injection of 1,33 mg (equivalent to 4 IU) star...

Background: Severe forms of genital endometriosis are known to be associated with infertility and its subsequent treatment failure. Both gonadotropin-releasing hormone analogs (a-GnRH) and dienogest have been suggested as additional hormone therapy for patients with endometriomas. However, the result of hormonal suppression before an in vitro ferti...

Introduction. The application of modern methods for assessing the morphofunctional state of the endometrium to verify and study the expression of sex steroid hormones, proinflammatory markers and markers of angiogenesis using confocal laser scanning microscopy will allow an objective study of the role of studied markers in the pathogenesis of the e...

Reproductive losses are quite frequent in the modern world. They include: infertility, infertility of unknown etiology, multiple losses when IVF, recurrent implantation failure, miscarriage, recurrent miscarriage, both in the natural cycle and after ART management. It is important to note that the classification of some of these categories are not...