Polymer heart valves are a promising alternative to bioprostheses, the use of which is limited by the risks of calcific deterioration of devitalized preserved animal tissues. This is especially relevant in connection with the increasingly widespread use of transcatheter valves. Advances in modern organic chemistry provide a wide range of polymers that can replace biological material in the production of valve prostheses.
View Article and Find Full Text PDFPoly-ε-caprolactone ((1,7)-polyoxepan-2-one; PCL) is a biodegradable polymer widely used in various fields of bioengineering, but its behavior in long-term studies appears to depend on many conditions, such as application specificity, chemical structure, in vivo test systems, and even environmental conditions in which the construction is exploited in. In this study, we offer an observation of the remote outcomes of PCL tubular grafts for abdominal aorta replacement in an in vivo experiment on a rat model. Adult Wistar rats were implanted with PCL vascular matrices and observed for 180 days.
View Article and Find Full Text PDFThe content of the soluble forms of immune checkpoint components sPD-1, sPD-L1 in blood serum, and sB7-H3, sCD314, sULBP1, sHLA-G in blood plasma of 30 melanoma patients receiving immunotherapy with anti-PD-1 antibodies (nivolumab, pembrolisumab) was measured before and in 4 and 8 weeks after the start of immunotherapy. The control group comprised 70 practically healthy donors. Standard immunoassay kits were used.
View Article and Find Full Text PDFBackground: Atezolizumab intravenous (IV) is approved for the treatment of various solid tumours. To improve treatment convenience and health care efficiencies, a coformulation of atezolizumab and recombinant human hyaluronidase PH20 was developed for subcutaneous (SC) use. Part 2 of IMscin001 (NCT03735121) was a randomised phase III, open-label, multicentre, noninferiority study comparing the drug exposure of atezolizumab SC with atezolizumab IV.
View Article and Find Full Text PDFAlofanib is a small-molecule allosteric extracellular FGFR2 inhibitor. We report safety and preliminary efficacy from the first-in-human phase 1b study of alofanib in heavily pretreated patients with advanced gastric cancer. The standard dose-escalation design 3+3 aimed to establish the maximum tolerated dose (MTD) or recommended phase 2 dose (RP2D).
View Article and Find Full Text PDFKhirurgiia (Mosk)
December 2022
Metabolic changes due to the progression of malignant neoplasms and the negative consequences of aggressive methods of its treatment lead to a decrease in food intake in patients, which contributes to the development of anorexia-cachexia syndrome in cancer patients due to complex interactions between pro-inflammatory cytokines and host metabolism. Within the framework of this article, the author analyzes the possibility of the influence of nutritional status in cancer patients. The analysis of the results of the study of a group of cancer patients with various nutritional statuses was carried out.
View Article and Find Full Text PDFVopr Kurortol Fizioter Lech Fiz Kult
December 2022
Background: Currently one of the urgent problems of oncology is he choice of tactics of rehabilitation measure. Despite the long list of known possible side effects from antitumor therapy, most patients do not receive follow-up and preventive interventions necessary to correct clinically significant consequences.
Objective: Analysis of clinical effectiveness of complex rehabilitation programs in patients with melanoma of skin receiving immunotherapy.
Vopr Kurortol Fizioter Lech Fiz Kult
September 2022
Objective: To analyze the quality of life in patients receiving immunotherapy and overall response rate in case of additional magnetotherapy.
Material And Methods: The study included 3 cohorts of patients (=48) with various disseminated malignancies (melanoma, lung cancer, kidney cancer) who received immunotherapy. In the study groups, all patients additionally took courses of rehabilitation based on magnetotherapy.
Vopr Kurortol Fizioter Lech Fiz Kult
September 2022
Objective: To evaluate adverse events and clinical effectiveness of complex rehabilitation programs in patients with malignant tumors receiving checkpoint inhibitor therapy.
Material And Methods: The study included 144 cancer patients who received immunotherapy for the period from 2019 to 2021. Group 1 consisted of 72 patients who received a comprehensive rehabilitation program including physical therapy, diet therapy, psychotherapy, general magnetotherapy.
Electrospun tissue-engineered grafts made of biodegradable materials have become a perspective search field in terms of vascular replacement, and more research is required to describe their in vivo transformation. This study aimed to give a detailed observation of hemodynamic and structural properties of electrospun, monolayered poly-ε-caprolactone (PCL) grafts in an in vivo experiment using a rat aorta replacement model at 10, 30, 60 and 90 implantation days. It was shown using ultrasound diagnostic and X-ray tomography that PCL grafts maintain patency throughout the entire follow-up period, without stenosis or thrombosis.
View Article and Find Full Text PDFMembranes (Basel)
May 2022
The effect of the morphology and content of zinc oxide nanoparticles (ZnO-NPs) on the physicochemical, mechanical, and gas transport properties of the polyurethane (PU) mixed matrix membranes (MMMs) with respect to CO recovery from CH, O, and N was studied. The MMMs based on PU with spherical and rod-shaped ZnO-NPs at various loadings, namely, 0.05, 0.
View Article and Find Full Text PDFResults of enzyme-linked immunosorbent assay of the soluble forms of PD-1/PD-L immune checkpoint receptor and ligand (sPD-1 and sPD-L1) in pretreatment blood serum of 88 breast cancer patients at various disease stages aged 30-83 years are presented. The control group included 55 practically healthy women aged 19-82 years. Serum sPD-1 and sPD-L1 levels in breast cancer patients highly significantly (p<0.
View Article and Find Full Text PDFTreatment of cancer often requires the use of adjuvant chemotherapy (ACT). In real clinical practice, numerous patients suffer from severe toxicity and reduced quality of life (QoL). Hence, there is a need to maintain QoL and to reduce therapy toxicity to comply with recommended chemotherapy (CT) regimens.
View Article and Find Full Text PDFNowadays, the imidazolium-based ionic liquids containing acetate counter-ions are attracting much attention as both highly selective absorbents of the acidic gases and CO₂ carriers in the supported ionic liquid membranes. In this regard, the investigation of the gas transport properties of such membranes may be appropriate for better understanding of various factors affecting the separation performance and the selection of the optimal operating conditions. In this work, we have tested CH₄, CO₂ and H₂S permeability across the supported ionic liquid membranes impregnated by 1-butyl-3-methylimidazolium acetate (bmim[OAc]) with the following determination of the ideal selectivity in order to compare the facilitated transport membrane performance with the supported ionic liquid membrane (SILM) that provides solution-diffusion mechanism, namely, containing 1-butyl-3-methylimidazolium tetrafluoroborate (bmim[BF₄]).
View Article and Find Full Text PDFCO₂ separation was found to be facilitated by transport membranes based on novel chitosan (CS)-poly(styrene) (PS) and chitosan (CS)-poly(acrylonitrile) (PAN) copolymer matrices doped with methylimidazolium based ionic liquids: [bmim][BF₄], [bmim][PF₆], and [bmim][Tf₂N] (IL). CS plays the role of biodegradable film former and selectivity promoter. Copolymers were prepared implementing the latest achievements in radical copolymerization with chosen monomers, which enabled the achievement of outstanding mechanical strength values for the CS-based membranes (75-104 MPa for CS-PAN and 69-75 MPa for CS-PS).
View Article and Find Full Text PDFThe course of preventive oral treatment with a dihydroquercetin-chitosan composition produced a strong antihypoxic effect under conditions of experimental hypobaric hypoxia (arbitrary altitude 12,000 m). The lactate/pyruvate ratio in composition-receiving rats was much lower than in hypoxic animals (by 83%), but higher than in intact specimens (by 29%). The composition of chitosan and dihydroquercetin also possessed a strong antioxidant activity.
View Article and Find Full Text PDFThe aim of the study was to conduct clinical and economic analysis of the feasibility of using Dicarbamine for the prevention of toxic effects of chemotherapy. There were compared the direct medical costs on prevention and treatment of febrile neutropenia in 2 groups of breast cancer patients: chemotherapy alone in TAC mode or chemotherapy in the same way against oral Dicarbamine. Total costs due to hematologic toxicity were 1003945 rubles in the control group (22817 rubles on average by 1 patient) and 658980 rubles in the group treated with Dicarbamine (14 644 rubles on average by 1 patient).
View Article and Find Full Text PDFStudy group consisted of 84 oncological patients with various tumor localization that received chemotherapy with taxanes. Medium follow up was 32.1 +/- 2.
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