MicroRNA level in patients with stable coronary artery disease with borderline coronary artery stenosis

Aim. To assess the level of microRNA (miR) -21, -22, -126, -221 in patients with coronary artery disease (CAD) with borderline coronary artery stenosis depending on comorbidities and sex.Material and methods. We examined 37 patients with class 1-3 stable CAD aged 49-59 years with borderline (40-70%) coronary artery stenosis. The relative level of miRNA was determined using real-time polymerase chain reaction. Statistical analysis was performed using the non-parametric Mann-Whitney U-test. P<0,05 were considered statistically significant. Results. The miR-221 level was higher in the group of patients with stable CAD with borderline coronary artery stenosis with a metabolically unhealthy obesity (MUO) phenotype, but without diabetes (p=0,042). The level of miR-22 and miR-126 was higher in the group of patients with stable CAD phenotype with borderline stenosis and diabetes (p=0,007 and p=0,034, respectively). The analysis of miR levels in stable CAD patients depending on sex, without taking into account the phenotype, found that miR-21 and miR-221 values were higher in men (p=0,021 and p=0,014, respectively). The study of the sex characteristics of miR content in relation to different phenotypes revealed an increase of miR22 levels in men with MUO and diabetes (p=0,048) and an increase of miR-126 levels in women with concomitant diabetes in the comparison both with patients without MUO and diabetes (p=0,018), as well as with MUO and without diabetes (p=0,007). Conclusion. The study of the miRNA level in patients with CAD with borderline coronary artery stenosis is of great interest and reflects a promising direction in diagnosis based on comorbid pathology. Keywords: miRNA, obesity phenotypes, coronary artery disease, borderline coronary artery stenosis. Relationships and Activities: none. 1Novosibirsk State Medical University, Novosibirsk; 2Federal Research Center of Fundamental and Translational Medicine, Novosibirsk; 3E.N. Meshalkin National Medical Research Center, Novosibirsk, Russia.><0,05 were considered statistically significant.Results. The miR-221 level was higher in the group of patients with stable CAD with borderline coronary artery stenosis with a metabolically unhealthy obesity (MUO) phenotype, but without diabetes (p=0,042). The level of miR-22 and miR-126 was higher in the group of patients with stable CAD phenotype with borderline stenosis and diabetes (p=0,007 and p=0,034, respectively). The analysis of miR levels in stable CAD patients depending on sex, without taking into account the phenotype, found that miR-21 and miR-221 values were higher in men (p=0,021 and p=0,014, respectively). The study of the sex characteristics of miR content in relation to different phenotypes revealed an increase of miR22 levels in men with MUO and diabetes (p=0,048) and an increase of miR-126 levels in women with concomitant diabetes in the comparison both with patients without MUO and diabetes (p=0,018), as well as with MUO and without diabetes (p=0,007).Conclusion. The study of the miRNA level in patients with CAD with borderline coronary artery stenosis is of great interest and reflects a promising direction in diagnosis based on comorbid pathology

Triple coalescence singularity in a dynamical atomic process

We show that the high energy limit for the amplitude of the double electron capture to the bound state of the Coulomb field of a nucleus with emission of a single photon is determined by behavior of the wave function in the vicinity of the singular triple coalescence point.Comment: 3 page

Atrial fibrillation and arterial hypertension in hypothyroid pathology

A special role in the formation of atrial fibrillation in patients with arterial hypertension is played by diseases of the thyroid gland. In any form of hypothyroidism, vascular tone increases, hypervolemia is formed, which leads to changes in blood pressure, myocardial dystrophy and the development of AF. The development and progression of AF affects the lack of thyroid hormones: TH suppresses aldosterone synthesis and stimulates the secretion of atrial and cerebral natriuretic peptide. Therefore, hypothyroidism develops hyperaldosteronism and decreases the content of natriuretic hormone in the blood, which leads to hypervolemia. Atrophic processes in cardiomyocytes are exacerbated by intracellular potassium deficiency, which is caused by hyper aldosteronism characteristic of all types of hypothyroidism. TG plays the role of physiological antagonists of antidiuretic hormone, and their deficiency leads to increased water reabsorption and increases the likelihood of the formation of a volume-dependent form of hypertension, the effect on the endothelium of the cell, releasing vasoactive substances and reducing the sensitivity of adrenoreceptors to the action of catecholamines. In hypothyroidism, almost all soft tissues, including the vascular wall, accumulate in an excessive amount of glycosaminoglycans, which binds sodium ions and water, which leads to swelling of the vascular wall, reduction of nitric oxide production and narrowing of the lumen of arteries and veins. Hyperproduction of thyroliberin, which leads to a decrease in dopaminergic activity of the brain. In addition, hypothyroidism causes thickening of the basement membrane of capillaries and the diffusion of oxygen through their wall is disturbed. The effect of hypothyroidism and drugs used in its treatment on AF is ambiguous. The authors disagree about the course of AF and the frequency of relapse, the risk of complications of AF. All this indicates the need to continue research in this direction.В статье изложен обзор литературы, отражающий преставления о значении гипотиреоидной патологии в развитии фибрилляции предсердий. особую роль в формирование фибрилляции предсердий у больных артериальной гипертонией играют заболевания щитовидной железы. При любой форме гипотиреоза повышается сосудистый тонус, формируется гиперволемия, что приводит к изменению уровня артериального давления, дистрофии миокарда и развитию фибрилляции предсердий. На развитие и прогрессирование ФП влияет недостаток гормонов щитовидной железы: тиреоидные гормоны подавляют синтез альдостерона и стимулируют секрецию предсердного и церебрального натрийуретического пептида. Поэтому при гипотиреозе развивается гиперальдостеронизм и снижается содержание в крови натрийуретического гормона, что приводит к гиперволемии. Атрофические процессы в кардиомиоцитах усугубляются внутриклеточным дефицитом калия, который обусловлен гиперальдостеронизмом, характерным для всех видов гипотиреоза. ТГ выполняют роль физиологических антагонистов антидиуретического гормона,а их дефицит приводит к усилению реабсорбции воды и повышает вероятность формирования объемзависимой формы АГ, влиянию на эндотелий клетки, высвобождающий вазоактивные вещества и уменьшения чувствительности адренорецепторов к действию катехоламинов. При гипотиреозе почти во всех мягких тканях, включая сосудистую стенку, накапливаются в избыточном количестве гликозаминогликаны, который связывает ионы натрия и воду, это приводит к отеку сосудистой стенки, снижению продукции оксида азота и сужению просвета артерий и вен. Гиперпродукция тиреолиберина, которая приводит к снижению дофаминергической активности головного мозга. кроме того, при гипотиреозе происходит утолщение базальной мембраны капилляров и нарушается диффузия кислорода через их стенку. Влияние гипотиреоза и препаратов, используемых при его лечении, на ФП неоднозначно. авторы расходятся во мнении относительно течения ФП частоты развития рецидивов, риска возникновения осложнений ФП. Все это указывает на необходимость продолжения исследований в данном направлении

Measurement of the 1s-2s energy interval in muonium

The 1s-2s interval has been measured in the muonium ({$\mu^+e^-$}) atom by Doppler-free two-photon laser spectroscopy. The frequency separation of the states was determined to be 2 455 528 941.0(9.8)~MHz in good agreement with quantum electrodynamics. The muon-electron mass ratio can be extracted and is found to be 206.768 38(17). The result may be interpreted as measurement of the muon-electron charge ratio as $-1- 1.1(2.1)\cdot 10^{-9}$

COMPARISON OF ENALAPRIL AND PERINDOPRIL IN PATIENTS WITH ARTERIAL HYPERTENSION AND LEFT VENTRICLE SYSTOLIC DYSFUNCTION

Aim. To compare efficacy of enalapril and perindopril in patients with arterial hypertension (HT) and left ventricle systolic dysfunction.Material and methods. Patients (n=51) with HT and left ventricle systolic dysfunction (ejection fraction<45%) were included in the prospective open randomized comparative study. Patients were randomized into 2 groups of therapy with enalapril 10-20 mg BID (n=25) or with perindopril 4-8 mg OD (n=26). Hydrochlorothiazide (12,5-25 mg OD) was added in case of ineffective therapy. Routine clinical examination, ambulatory blood pressure (BP) monitoring, an electrocardiogram, an echocardiography were performed in all patients.Results. The 24-hour and night antihypertensive effect of enalapril was more prominent than this of perindopril. Target BP level was reached in 21 patients (84%) of enalapril group and in 20 patients (76,9%) of perindopril group. 8 (30,8%) patients of perindopril group did not reach night target BP level vs 3 (12%) patients of enalapril group. Similar improvement of the left ventricle systolic function was observed in both groups.Conclusion. Enalapril and perindopril demonstrated comparable antihypertensive and cardioprotective effect