THE ROLE OF β, α1 AND α2-ADRENO RECEPTORS IN THE REGULATION OF THE HEART RATE OF LABORATORY ANIMALS EXPOSED TO VARIOUS MODES OF MOTOR ACTIVITY

For the first time, studies were conducted to study the features of the heart rate response of laboratory animals exposed to various modes of motor activity when administered with β, α1 and α2-blockers. It was found that in all the experimental groups of animals studied, a decrease in the heart rate response was observed in the first week after the introduction of β, α1 and α2-adreno blockers. It was revealed that the initial reaction of the heart rate on the introduction of β, α1 and α2-blockers depends on the level of motor activity of laboratory animals. It was found that the most pronounced decrease in the heart rate response to the introduction of different subtypes of adreno-blockers is observed in the group of animals with limited motor activity. At the same time, the smallest decrease in the heart rate response occurs in the group of animals subject to enhanced motor mode. It was revealed that in the group of experimental animals, during further muscle training, by the end of the fourth week, there was a less pronounced decrease in the heart rate response to the administration of β, α1 and α2-adreno blockers. It was found that in a group of animals subject to a regime of limited motor activity, by the end of the fourth week of hypokinesia, the most pronounced decrease in the heart rate response to the introduction of β, α1-targeted blockers occurs.

547 - BDNF and cognitive function in Alzheimer’s disease

Relevance:Alzheimer’s disease (AD) is a neurodegenerative pathology that develops mainly in elderly and senile people.Disruption of BDNF transport or suppression of its production appears to be typical for people of old age. Objective: To investigate the influence of Alzheimer’s disease on the secretion of brain factors and correlate with neuropsychological profiles.Material and methods of research:12 men (2) and women (10) with Alzheimer’s disease were examined. The average age of the subjects was 76.25 + 4.89. Methods: MMSE, ADAS-COG, laboratory - BDNF was performed using the G7611 BDNF Emax (R) ImmunoAssaySystem 5 x 96 wells, BDNF Emax® Immunological test.Results:2 patients have mild dementia, 8 patients have moderate dementia, 2 patients have severe dementia. The average age of patients with mild dementia was 72.0 + 1.0. The average MMSE score is 16.7 + 3.4. Correlation analysis showed a close relationship between a pronounced decrease in memory in memory tests (ADAS-COG) and a pronounced decrease in blood BDNF content (r = 0.676). A close statistically significant relationship was found between a low result of the recognition test and a low blood BDNF content (r = 0.598).Conclusion:we assume that blood BDNF is a marker of pathologically accelerated aging of the central nervous system, since low test results for mnestic function are an indicator of severe degeneration in Alzheimer’s disease.

Evaluation of the effectiveness of statin and spironolactone by the influence on indicators of vascular stiffness in patients with arterial hypertension

Introduction The possibility of slowing down vascular remodeling in hypertensive patients with the combined effect of antihypertensive drugs and statins has been studied in unitary studies. The effect of spironolactone on vascular stiffness in relation to the severity of the hypotensive effect in combination therapy has also been insufficiently studied. The aim of the research was to study the dynamics vascular stiffness parameters in hypertension patients of high/very high cardiovascular risk in addition rosuvastatin or spironolactone to combined two-component amlodipine and lisinopril therapy. Methods 90 patients (46 men and 44 women aged 51.6±8.5) with hypertension were randomized into groups: the first group received a fixed combination of amlodipine/lisinopril, the 2nd one followed the same regimen of therapy with addition of 20 mg rosuvastatin, the third - in addition to the combination of amlodipine / lisinopril received 25 mg of spironolactone. The office and ambulatory blood pressure (BP), central (aortic) BP, augmentation index (AIx), carotid-femoral and carotid-radial pulse wave velocity (PWV) were evaluated before and after a 24-week follow-up period. Results The office and average daily blood pressure decreased against the background of all therapy regimens (all p<0.0001). The degree of decrease in the above parameters was more pronounced under the influence of spironolactone, compared with taking a combination of amlodipine / lisinopril (office systolic BP (SBP) p=0.04 and diastolic BP (DBP) p=0.002, average daily SBP p=0.02 and DBP p=0.014) and office DBP in comparison with the group of additional administration of rosuvastatin (p=0.02). A decrease in central BP and AIx was noted in all groups. A more pronounced decrease in AIx occurred in the statin supplementation group relative to the standard treatment group (−5.8% and −9.0%, respectively, p=0.036). Carotid-femoral PWV significantly decreased in all groups (−0.9±1.5 m/s, −0.7±1.4 m/s, −2.2±2.6 m/s, respectively), in greater degree in the spironolactone addition group compared with the statin supplementation group (p=0.036). Carotid-radial PWV to the same extent significantly decreased only in the second (from 9.5±1.8 to 8.8±1.1 m/s (p=0.034)) and the third (from 9.8±1.3 to 8.4±1.3 m/s (p=0.0002)) groups. Conclusions The addition of a statin to a two-component combination of amlodipine / lisinopril in the treatment of hypertensive patients had an additional effect on the elastic properties of the aorta, in the form of a decrease in the augmentation index, and peripheral arteries, in the form of a decrease in PWV. The addition of spironolactone to standard therapy was accompanied by a significant increase in the antihypertensive effect and a decrease in aortic stiffness in the form of a more pronounced decrease in PWV in the carotid-femoral and carotid-radial areas. FUNDunding Acknowledgement Type of funding sources: None.

Dual mechanisms of opioid-induced respiratory depression in the inspiratory rhythm-generating network

The analgesic utility of opioid-based drugs is limited by the life-threatening risk of respiratory depression. Opioid-induced respiratory depression (OIRD), mediated by the μ-opioid receptor (MOR), is characterized by a pronounced decrease in the frequency and regularity of the inspiratory rhythm, which originates from the medullary preBӧtzinger Complex (preBӧtC). To unravel the cellular- and network-level consequences of MOR activation in the preBӧtC, MOR- expressing neurons were optogenetically identified and manipulated in transgenic mice in vitro and in vivo. Based on these results, a model of OIRD was developed in silico. We conclude that hyperpolarization of MOR-expressing preBӧtC neurons alone does not phenocopy OIRD. Instead, the effects of MOR activation are twofold: 1) pre-inspiratory spiking is reduced and 2) excitatory synaptic transmission is suppressed, thereby disrupting network-driven rhythmogenesis. These dual mechanisms of opioid action act synergistically to make the normally robust inspiratory rhythm generating network particularly prone to collapse when challenged with exogenous opioids.

CLINICAL MANIFESTATIONS OF DRY EYE SYNDROME

Синдром сухого глаза - это комплекс поражений конъюнктивы и роговицы, возникающих в связи с выраженным снижением слезопродукции и нарушением стабильности слезной пленки. Цель исследования. Изучить особенности клинического проявления синдрома «сухого глаза. Материалы и методы. Данный анализ основывается на данных международных и отечественных статей по синдрому «сухого глаза». Результаты и обсуждение. На сегодняшний день, классический синдром «сухого глаза» встречается относительно редко.Сухость конъюнктивы и роговицы, слизистой рта и носа являются непременными признаками этого синдрома. Dry eye syndrome is a complex of lesions of the conjunctiva and cornea that occur in connection with a pronounced decrease in tear production and a violation of the stability of the tear. Purpose of the study. To study the features of the clinical manifestation of dry eye syndrome. Materials and methods. This analysis is based on data from international and domestic articles on dry eye syndrome Results and discussion. Today, the classic dry eye syndrome is relatively rare. Dryness of the conjunctiva and cornea, mucous membranes of the mouth and nose are indispensable signs of this syndrome.

The effect of indium introduction method on the properties of Pt/In/Al2O3-Cl reforming catalyst

The effect of 0.3 wt.% indium, which was introduced at the steps of alumina peptization or impregnation, on the properties of platinumalumina reforming catalysts was studied. Doping with indium at the impregnation step produced a smaller decrease in the total acidity of the support and hence in the heptane conversion for the corresponding Pt/In/Al2O3-Cl catalyst. The most pronounced decrease in selectivity of hydrogenolysis and hydrocracking and the maximum i-C5-7 : toluene selectivity ratio were observed for this sample as compared to the undoped catalysts with indium introduction at the peptization step.

Particularities of immunological reactivity, nitric oxide and its metabolities production in patients with pulmonary tuberculosis in association with covid-19 infection

The study included 24 patients, which formed the baseline group — 12 patients with pulmonary tuberculosis in combination with COVID-19 infection and the control group — 12 patients with pulmonary tuberculosis. There were studied the leukocyte formula, the content of CD3, CD4, CD8 lymphocytes, the content of NO2-+NO3- total and its metabolites. The obtained results showed that in patients with pulmonary tuberculosis and COVID-19 there is a pronounced decrease of lymphocytes and an unexpressed shift of the leukocyte formula to the left. The lymphocyte content decreases due to CD3 lymphocytes and their subpopulation of CD4 (helper) lymphocytes. The CD4/CD8 immunoregulatory index demonstrates a stimulation of immunological reactivity in patients with pulmonary tuberculosis and depression of immunological reactivity in patients with pulmonary tuberculosis in combination with COVID-19 infection and a pronounced suppression of the production content of NO2-+NO3- total and its metabolites (NO2- and NO3-).

Research of effects of plant preparation with integrated action in cough therapy in school children

Introduction. Cough accompanies an acute infectious process in the respiratory tract. The article focuses on the symptomatic treatment of cough using a modern herbal preparation with complex action and standard therapy.Goal. To study the effects of a herbal preparation with complex action in the treatment of cough in children.Materials and methods. The study included 72 patients of both sexes (mean age 14.6 ± 2.3 years) with a symptom of unproductive/unproductive cough, against the background of acute bronchitis or community-acquired pneumonia.Results and discussion. When using a herbal preparation with complex action was used in ¾ of the children, cough decreased by the 3rd day and in most patients it stopped by the 10 th day. The severity of daytime and nighttime coughs decreased by 3.0–3.5 points, the number of seizures decreased to 2–4 per day, the duration of seizures also decreased significantly, the median of this indicator in the main group reached 0 points. In both groups, the proportion of patients with seizure frequency of no more than 4 per day increased. While taking a herbal preparation, a more pronounced decrease in all indicators of cough by 3.5 times was noted throughout the treatment, and the corresponding effects developed 3 days ahead of time against the background of a full course of therapy. The average value of the efficacy and safety assessment given by the medical researchers to the action of the herbal preparation with complex action was 3.6 points. Analysis of objective and subjective data based on the results of evaluating case histories and individually developed questionnaires for patients on drug tolerance showed equivalence in terms of excellent and good results. Against the background of the full course of treatment with the herbal preparation, a 1.8 times more pronounced decrease in the characteristics of the cough syndrome was noted.Conclusion. The drug has shown high efficacy and safety, which makes it possible to recommend it as a symptomatic therapy for cough in school-age children as part of a combination or monotherapy.

Advantages of the application method for taking a biopsy of the gastric mucosa to assess its functional state and microflora composition in obese children

Relevance. Obesity is one of the most pressing problems of modern Pediatrics.The purpose of the study: to study the morphofunctional state and features of the composition of the stomach microflora in obese children using and comparing various endoscopic methods of biomaterial sampling.Materials and methods. 164 children aged 7 to 17 years were examined. The main group — 85 obese people, the comparison group‑79 children with normal body weight and digestive diseases. Esophagogastroduodenoscopy was performed, followed by pathomorphological, bacterioscopic, and microbiological examination of the biological material. In addition to sampling the biopsy of the antral part of the stomach with a sterile farcept, 40 patients were additionally taken from the wall biological material by obtaining a smear from the mucous membrane with the author’s endoscopic probe.Research result. The frequency of inflammatory changes IN the gastrointestinal tract was high in both groups and did not depend on body weight. In the main group, duodeno-gastric reflux (DGR) (32–38% и 9–11%, p<0.05) and cardia insufficiency (46–54% и 36–46%, p>0.05) were more often diagnosed. With an increase in the degree of obesity, the total number of refluxes increased — from 45–53% at grade I to 64–75% at grade IV, and DGR — from 12–14% to 49–58%, respectively. The most frequent localization of inflammatory changes in children of the main group was the antral (43–50%), less often — the stomach body (26–30%), while in the comparison group the body was more often affected (42–52%) and less often the antral (24–30%). In most children, regardless of the group (56–66% и 51–65%), chronic gastritis of moderate activity was registered. A high degree was significantly more often detected in the comparison group (14–16% and 24–30%, p<0.05), while a weak degree was detected in children of the main group (16–19% and 5–6%, p<0.05). In children of the main group, H. pylori (HP) was more often detected (45–53% и 25–32%, p <0.05), while 1 degree of contamination was more often determined (43–51% и 39–48%), while in the comparison group — 3 degree (15–18% и 24–30%). With increasing degree of obesity increased frequency of contamination from the antrum, HP — from 36–42% when I level up to 60–71% in IV degree of obesity. When using the application in HP+ children of the main group were more often sown opportunistic pathogens in a more diverse species composition and a more pronounced decrease in planting indigenous microflora, and regardless of HP significantly more prevalent growth of E. coli and Candida. In the presence of DGR, independently of the group, a significantly higher growth of fecal flora and a more pronounced decrease in the seeding of indigenous microflora was obtained.Conclusions.1. A high frequency of inflammatory and functional disorders in children, regardless of body weight, was established.2. Motor-evacuation disorders in children with obesity recorded often (63% and 43%). As the degree of obesity increases, their frequency increases. DGR in obese children is recorded significantly more often (38% and 11%, p<0.05).3. Children with obesity have a higher frequency of registering a low degree of activity of chronic gastritis, and children with normal body weight have a high frequency. The degree of activity of the inflammatory process does not depend on the degree of obesity and the duration of the disease.4. HP in obese children is detected 1.5 times more often than in children with normal body weight; the predominance of low (1 degree) contamination is characteristic. With an increase in the degree of obesity, the frequency of HP contamination increases (from 42% at grade I to 70% at grade IV obesity).5. HP-positive children show significantly higher growth of E. Faecium, S. viridans and Streptococcus faecalis and lower seeding of Lactobacterium and Bifidobacterium.6. DGR contributes to a more pronounced decrease in the growth of indigenous microflora, only Streptoco

Dual mechanisms of opioid-induced respiratory depression in the inspiratory rhythm-generating network

The analgesic utility of opioid-based drugs is limited by the life-threatening risk of respiratory depression. Opioid-induced respiratory depression (OIRD), mediated by the μ-opioid receptor (MOR), is characterized by a pronounced decrease in the frequency and regularity of the inspiratory rhythm, which originates from the medullary preBötzinger Complex (preBӧtC). To unravel the cellular- and network-level consequences of MOR activation in the preBötC, MOR-expressing neurons were optogenetically identified and manipulated in transgenic mice in vitro and in vivo. Based on these results, a model of OIRD was developed in silico. We conclude that hyperpolarization of MOR-expressing preBötC neurons alone does not phenocopy OIRD. Instead, the effects of MOR activation are twofold: 1) pre-inspiratory spiking is reduced and 2) excitatory synaptic transmission is suppressed, thereby disrupting network-driven rhythmogenesis. These dual mechanisms of opioid action act together to make the normally robust inspiratory-rhythm-generating network particularly prone to collapse when challenged with exogenous opioids.