Vol 7, No 1 (2019)

The aim of this research is the review of scientific and technical literature regarding possibility of using sorption processes in the technology of drug delivery systems.Materials and methods. The materials are the following electronic resources: eLIBRARY, CyberLeninka, PubMed. The methods of review are analysis and synthesis. The study covers the scientific literature from 1996 up to the present time.Results. Sorbents are used as carriers for various medicinal peroral substances, they are also dispensers of various compounds in the form of polymeric eye films and stents in the human body. The delivery of medicinal substances occurs with the help of sorption processes of mass transfer. Currently, the following medical substances are used as carriers for medicinal substances: activated carbon, mineral sorbents (medical clays, synthetic sorbents), polymers and their biosimilars. 6 groups of pharmaceutical substances are registered for the production of enterosorbents in Russia and they can be used as sorbent carriers in the sorption drug system. They are: activated carbon, colloidal silicon dioxide, polyvinylpyrrolidone, dioctahedral smectite, polymethylsiloxane polyhydrate. As a result of the study, the model of the sorption drug system has been developed. It consists of sorbent carrier, active pharmaceutical ingredient and excipients that provide the desorption. Desorption of the active pharmaceutical ingredient may contribute to its modified release. The technology for obtaining sorption medicinal systems requires further study and development of modeling methods, searching for experimental pharmacological models and technological methods, which make it possible to obtain sorption dosage form with modified release.Conclusion. The review of the sorption processes used in the technology of drug delivery systems has been carried out. The model of the sorption drug system has been developed.

The aim of the paper is to assess the change in the mitochondrial respirometric function under conditions of various pathologies.Materials and methods. The study was performed on male Wistar rats. Experimental focal cerebral ischemia, traumatic brain injury, coronary occlusive myocardial infarction and muscle dysfunction were used as pathological models. Focal ischemia was reproduced by the method of irreversible thermocoagulation of the middle cerebral artery. Traumatic brain injury was modeled by the method of free fall of the load. Experimental myocardial infarction was reproduced by ligating the descending branch of the left coronary artery. Muscle dysfunction was modeled by the method of «forced swimming with a 20% burden». The respiratory function of mitochondria was assessed by the method of respirometry by the change in oxygen consumption when introducing mitochondrial respiration into the medium: Oligomycin, Rotenone and FCCP. Additionally, we evaluated the intensity of the glycolysis process and the activity of respiratory complexes I, II, IV and V. In order to comprehensively assess the respiratory function, an ELISA study was conducted to determine the concentration of ATP, mitochondrial ATP synthetase, cytochrome C oxidase and NADP-Oxidase 4.Results. In the course of the study it was established that under conditions of experimental cerebral ischemia, traumatic brain injury, myocardial infarction and muscle dysfunction, the ATP-generating ability of mitochondria the maximum breathing and respiratory capacity deteriorated, herby the decrease in overall respiratory function was accompanied by an increase in glycolysis, which was uncompensated, as well as dysfunction of mitochondrial complexes I, II, IV and V, confirmed by an increase in NADPH oxidase 4 activity and a decrease in cytochrome C oxidases and ATP synthetase. As a result, the observed changes in mitochondrial respiration function contributed to a decrease in ATP concentration under conditions of cerebral ischemia - by 3.2 times (p <0.05), traumatic brain injury – by 2.6 times (p <0.05), myocardial infarction – by 1.8 times (p <0.05) and muscle dysfunction – by 4 times (p <0.05).Conclusion. Basing on the data obtained, we can assume that in conditions of cerebral ischemia, traumatic brain injury, myocardial infarction and muscle dysfunction, there is deterioration of the mitochondrial respirometric function with inhibition of ATP synthesis and increased glycolysis.

The aim of the article is to evaluate Bischofit gel reparative activity in a linear wound model in rats.Materials and Methods. The study was conducted on 36 male Wistar rats weighing from 193 to 218 grams. On the 8th day after modeling a linear wound defect 50±1 mm long, the reparative effect of bischofite, Actovegin and Contractubex in the gel compositions was evaluated. The evaluation was carried out using: the following methods: 1) studying the physicomechanical characteristics of the wound defect (a wound-tearing machine Metrotest REM-0.2-1); 2) morphological examination of the skin graft taken from the wound area (stained with hematoxylin-eosin and Van Gieson‘s solution); 3) determining the ratio of collagen types I and III in a polarizing microscope (the picrosirius was red); 4) cоlorimetric analysis of the hydroxyproline concentration in the wound surface tissues.Results. On the 8th day, the wound defects sampled from the bischofite treated animals, were characterized by the most pronounced strength (the average force at the rupture moment was 13.70 N), which was significantly higher (p<0.01) than in the control group (11.76 N). Actovegin showed less influence on this parameter (12.60 N), and the use of Contractubex led to its decrease (8.10 N). The effect of the drugs on the morphological state of the skin tissue was similar. The hydroxyproline concentration in the studied groups’ samples was: Bischofit 13.23±1.68; Actovegin 15.89±1.37; Contractubex 17.61 ± 0.67; the Control was 16.59±1.08. According to the impact on the ratio of collagen in types I and III, the studied drugs were arranged in the following sequence: Bishofit (0.73±0.023) > Actovegin (0.67±0.017) > Control (0.56±0.012) > Contractubex (0.38 ±0.020).Conclusion. The carried out study showed that Bischofit has a pronounced ability to stimulate the regeneration of the skin wound defect. Hereby, the reference drug Actovegin showed less activity, and Contractubex worsened wound healing.