Pancreatic ductal adenocarcinoma: tumor microenvironment and problems in the development of novel therapeutic strategies.

Diagnosis and treatment of carcinoma of the exocrine part of the pancreas is a serious problem for modern medicine. Despite the identification of a large number of aberrant mutations in pancreatic ductal adenocarcinoma (PDAC), attempts to create effective therapeutic agents based on identified genetic or epigenetic variations have not been succesful. The role of the tumor microenvironment (TME) in tumor progression is currently a popular topic.

[The dual role of the menopausal hormonal therapy as the enhancer of pleiotropic telomere rejuvenation and the silencer of cellular aging (literature review)].

Present worldwide healthcare researches prove that female patients are more sensitive to the population aging. Menopause or climacteria (climax) - is not as ageing itself, but a physiological unstoppable process. The main task for a physician is to improve life quality for female despite of ageing problems.

Investigation of MAO Coatings Characteristics on Titanium Products Obtained by EBM Method Using Additive Manufacturing.

Coatings with a thickness from 27 to 62 µm on electron beam melted Ti-6Al-4V have been formed by micro-arc oxidation (MAO) in a silicate-hypophosphite electrolyte. MAO tests in the anode-cathode mode (50 Hz) with an anode-to-cathode current ratio of 1:1 and sum current densities 10 and 20 A/dm were carried out. The duration of the MAO treatment was 30 and 60 min.

[Comparative evaluation of the shear bond strength of a universal adhesive system in different etching modes and a total etch adhesive system].

Objective: To determine a comparative evaluation between the shear bond strength (SBS) of total etch adhesive system and the SBS of universal adhesive system in various etching techniques.

Material And Methods: There were made 60 sections of teeth for the laboratory research. The studied samples had been divided into 4 groups (15 samples in each group).

[Features of the cell composition of inflammatory infiltrate in different phases of diffuse alveolar lung damage with COVID-19].

Background: Acute respiratory distress syndrome (ARDS) with COVID-19 has a worse prognosis than ARDS with other diseases. Mortality from ARDS with COVID-19 is 26.0 - 61.

Microbiological and molecular identification of the anaerobic component of the oral microbiota in patients with cancer of the oropharyngeal region.

A research objective - to study tumor tissues of primary and recurrent patients with cancer of the oropharyngeal region for the frequency of occurrence of four types of anaerobic periodontogens and their associations by two methods: real-time PCR and cultural. There is speculation that bacteria can influence the pathogenesis of cancer. A comparative assessment of the content of four anaerobic periodontogens (Porphyromonas gingivalis, Prevotella intermedia, Tannerella forsythensis, Treponema denticola) in the tumor tissue and in the healthy tissue of the oral mucosa of patients with oropharyngeal cancer was carried out.

[Urinary incontinence in women and its impact on quality of life].

The prevalence of urinary incontinence at a young age is 20-30%, gradually increasing to 40% among older women. Urinary incontinence affects many areas of the patient's life, including social, psychological, work, sexual, etc. The main causative factors, which also influence on its severity, include age, pregnancy, childbirth and obesity.

[Assessment of histologic activity in colitis].

The histological activity of the bowel inflammation is an extremely important morphological criterion that is encountered in the diagnosis of colitis. However, the determining of its degree is subjective and still does not have a generally accepted principle of gradation. The article describes the most common scale-schemes for assessing the severity of colitis, that include the degree of microscopic changes.

Regression of Liver Steatosis Following Phosphatidylcholine Administration: A Review of Molecular and Metabolic Pathways Involved.

Liver steatosis is a key pathology in non-alcoholic or metabolic associated fatty liver disease. Though largely ignored for decades it is currently becoming the focus of research in hepatology. It is important to consider its origin and current opportunities in terms of pharmacotherapy.

The Combined Use of 5-ALA and Chlorin e6 Photosensitizers for Fluorescence-Guided Resection and Photodynamic Therapy under Neurophysiological Control for Recurrent Glioblastoma in the Functional Motor Area after Ineffective Use of 5-ALA: Preliminary Results.

The treatment of glial brain tumors is an unresolved problem in neurooncology, and all existing methods (tumor resection, chemotherapy, radiotherapy, radiosurgery, fluorescence diagnostics, photodynamic therapy, etc.) are directed toward increasing progression-free survival for patients. Fluorescence diagnostics and photodynamic therapy are promising methods for achieving gross total resection and additional treatment of residual parts of the tumor.

A Review of Recent Studies on the Effects of SARS-CoV-2 Infection and SARS-CoV-2 Vaccines on Male Reproductive Health.

According to world statistics, men are more susceptible to the coronavirus disease 2019 (COVID-19) than are women. Considering the interconnection between infections and male infertility, investigation of the potential impact of COVID-19 on men's reproductive health is now a particularly relevant topic. Published data indicate decreased sperm quality and orchitis development in patients with COVID-19, including reduced sperm count, decreased sperm motility, and elevated DNA fragmentation index.

A New Approach to Overcome Insulin Resistance in Patients with Impaired Glucose Tolerance: The Results of a Multicenter, Double-Blind, Placebo-Controlled, Randomized Clinical Trial of Efficacy and Safety of Subetta.

Impaired glucose tolerance (IGT) is a common carbohydrate metabolism disorder world-wide. To evaluate the efficacy and safety of 12-week Subetta therapy in correcting 2-h plasma glucose in patients with IGT, a multicenter, double-blind, placebo-controlled, randomized clinical trial was performed. Derived by technological treatment of antibodies to insulin receptor β-subunit and endothelial NO synthase, Subetta increases the sensitivity of insulin receptors by activating the insulin signaling pathway.

[Melatonin status in obese patients with ovarian dysfunction at reproductive age].

Background: Melatonin is the main hormone of the pineal gland. By regulating circadian rhythms and being an immune regulator and antioxidant, this hormone takes part in the work of the ovaries: its high concentrations block apoptosis and neutralize reactive oxygen species involved in folliculogenesis, ovulation, egg maturation and corpus luteum formation.

Aim: To study melatonin status and its relationship with menstrual dysfunction and sleep disorders in obese women of reproductive age.

[Current view on the issue of insufficient effectiveness of anti-VEGF therapy for age-related macular degeneration].

Due to the significant medical and social importance of neovascular (wet) age-related macular degeneration (wAMD), increasing the effectiveness of anti-VEGF therapy used to treat this disease is one of the high-priority problems in modern retinology. This article focuses on pathobiological aspects and clinical manifestations of incomplete responses to anti-VEGF therapy of wAMD, considers the proposed ways to improve the terminology and classification of responses to therapy, as well as the assessment of its correctness and effectiveness of the treatment. It also discusses the available ways to optimize anti-VEGF therapy and define the criteria of its termination in cases when the treatment proves to be futile.

A Pilot Study of Fluorescence-Guided Resection of Pituitary Adenomas with Chlorin e6 Photosensitizer.

Fluorescence diagnostics is one of the promising methods for intraoperative detection of brain tumor boundaries and helps in maximizing the extent of resection. This paper presents the results of a pilot study on the first use of the chlorin e6 photosensitizer and a two-channel video system for fluorescence-guided resection of pituitary adenomas. The study's clinical part involved two patients diagnosed with hormonally inactive pituitary macroadenomas and one patient with a hormonally active one.

[Is there a claudin-low phenotype of breast cancer?].

The novel molecular subtype of breast cancer (BC), named "claudin-low", was described in 2007. It was characterized by the consistently low expression of genes involved in the formation of epithelial tight junctions in combination with the high activation of genes associated with the epithelial-to-mesenchymal transition, as well as tumor stem cell markers. The similar claudin- low subtype was later identified at the transcriptional level in bladder cancer, gastric cancer, and serous ovarian cancer.

[Morphology features of gunshot injuries in occupants of a car].

The article presents a case of fatal gunshot wounds in occupants of a car. The wounds occurred after the passage of gunfire projectiles through a vehicle's triplex glass barrier and had certain features that distinguished them from the common wounds due to the characteristics of the barrier. As part of the solution of the expert questions, the following up-to-date research methods were applied: scanning electron microscopy, energy-dispersive analysis, and computerized three-dimensional reconstruction of the incident circumstances.

[Andrological aspects of new coronavirus infection Covid-19].

COVID-19 is a new highly contagious infectious disease caused by the SARS-CoV-2. The World Health Organization (WHO) on March 11, 2020, has declared the novel coronavirus (COVID-19) outbreak a global pandemic. More attention is currently paid to the fact that men are more at risk for worse outcomes.

Modern Approaches to Acellular Therapy in Bone and Dental Regeneration.

An approach called cell-free therapy has rapidly developed in regenerative medicine over the past decade. Understanding the molecular mechanisms and signaling pathways involved in the internal potential of tissue repair inspires the development of new strategies aimed at controlling and enhancing these processes during regeneration. The use of stem cell mobilization, or homing for regeneration based on endogenous healing mechanisms, prompted a new concept in regenerative medicine: endogenous regenerative medicine.

[A new look at colonic mucosal structural rearrangement and the stages of chronic colitis].

Objective: To revise the existing criteria to improve the definition of chronic colitis stages in inflammatory bowel diseases (IBDs).

Material And Methods: A total of 100 cases of IBDs (ulcerative colitis (=70) and Crohn's disease (=30) diagnosed in 2017 to 2019 were examined. Thirty patients with colitis were selected for a comparison group, who were assigned to an infective colitis group or a drug-induced colitis one at the final diagnosis.

[Features of the trajectory of particles of car triplex glass damaged by Saiga carbine shots with the cartridge 5.45×39 mm].

Is to study the character of deflection of fragments of a semi-jacketed shell (a semi-jacketed bimetallic bullet with a lead core of a 5.45×39 mm cartridge for the Saiga carbine) and the ejection of fragments of the triplex glass shot with it. The experiments results showed that when a triplex glass pierced at an angle of 60° with respect to the sightline, there is a deflection towards the normal line of the flight direction of the shell and obstacle fragments.

[Dental care in health resort institutions].

Unlabelled: Over the past decades, a small yet convincing evidence base has accumulated that demonstrates the effectiveness of dental care for patients in health-resort (HR) settings. In addition to a positive local effect, complex HR care increases nonspecific resistance and promotes desensitization.

Objective Of The Review: Addressing the HR rehabilitation in patients with various maxillofacial diseases for further consideration of the possibility of the increased use of HR care in dental practice.

[Immunohistochemical and molecular diagnosis of inflammatory myofibroblastic tumor of the uterus: a literature review and a clinical case].

Inflammatory myofibroblastic tumors of the uterus (uIMT) are rare and difficult to diagnose neoplasms, since the morphological characteristics of this tumor are not specific and are found in other pathological changes. In addition, until recently, specific uIMT markers have not been identified and their diagnostic standards not defined. However, in recent years, there have been more and more studies aimed to identify characteristic morphological, immunohistochemical, and molecular genetic features for the differential diagnosis of uIMT.

[Primordial odontogenic tumor is a new nosological entity in the 2017 WHO classification of Head and Neck Tumors].

The paper describes a case of primordial odontogenic tumor of the mandible, a rare neoplasm that has been recently included into the WHO classification. It presents its clinical, radiological, morphological, and immunohistochemical characteristics.