EDITORIAL
NTERDISCIPLINARY BASIC RESEARCH IN MEDICINE
A Endothelial protective and antithrombogenic effects of Cimicifuga racemosa standardized extract (Klimadynon, Bionorica, Germany) in comparison with ethinylestradiol in experimental ovariectomy were investigated. Extract of Cimicifuga racemosa (klimadynon) contents phytoestrogens, that was the basis for studying of its effects in hypoestrogenic conditions for the purpose of prophylaxis and treatment of cardiovascular complications in climacteric syndrome as an alternatively of hormonal replacement therapy.
The course administration of klimadynon (100 mg/kg p.o. daily during 14 days) decelerated the formation of intravascular thrombosis which was initiated by application of 10% FeCb solution on carotid artery. The ethinylestradiol in this conditions intensified prothrombogenic effect of application of 10% FeCh: blood flow in carotid artery stoped to 5 minutes of experiment and mass of the thrombus was on 28% more, than in control rats. For studying of possible mechanisms antithrombogenic action of klimadynon antiplatelet and vasodilator activity of endothelium were studied in rats after bilateral ovariectomy in comparison with effects of ethinylestradiol (25 µg/kg p.o. daily during 14 days). Treatment with klimadynon as well as ethinylestradiol increased the antiplatelet activity of endothelium, restoring its activity to level in sham-operated animals. The endothelium-dependent and endothelium-independence vasodilation by using of acetylcholine (5 µg/kg) and of sodium nitroprusside (30 µg/kg). respectively, were investigated. Coefficient of endothelium dysfunctions (CED) was estimated as ratio: area over curve of arterial pressure after sodium nitroprusside intravenous injection to value of this index after injection of acetylcholine. In rats after bilateral ovariectomy CED was increased by 66% in comparison with CED value in sharm-operated rats. The klimadynon and ethinylestradiol treatment decreased CED on 42% and 28% correspondingly in comparison with values of control group.
In summary klimadynon has antytrombogenic and endothelial protective activities in the rats after ovariectomy. The ethinylestradiol decreases endothelial disfunction in ovariectomized rats, but unlike klimadynon demonstrates protrombogenic effect. The present findings suggest that klimadynon could be used as a therapeutic agent for menopausal vascular complication.
Vitiligo is a disease with unknown etiology, which is characterized by skin depigmentation areas due to melanocyte death. Lack of clear understanding of pathogenic disease processes justifies the difficulty of choosing efficient treatment methods. Repigmentation is slow and not always complete. One of the key indicators in practical dermatology is objective assessment of skin cover condition for further diagnostics, definition of therapy and dynamics of the disease.
The purpose of this study is to assess skin reflection spectrum in depigmentation areas, marginal layer and visible healthy skin before and after treatment of patients with vitiligo.
21 patients having vitiligo were under observation; the patients were treated in the hospital of skin and venereal diseases of the Siberian State Medical University. The authors applied noninvasive method of spectrophotometry for the first time in order to study skin reflection spectrum of patients with vitiligo. Noninvasive medical spectrophotometry is based on dependence factor of integral optical properties of biological tissues and fluids in the conditions of homeostasis and in case of pathology. In order to assess the efficiency of skin disease treatment the patients were exposed to skin spectrophotometry before the beginning of the treatment and after the treatment itself with further measurements of the reflection spectrum integral criteria. The measurements were made in depigmentation area, on the boundary with healthy skin and in remote from depigmentation area of healthy skin.
Obtained results indicate the difference of skin reflection spectra in the areas under investigation. Moreover, positive dynamics of the treatment associated with the decrease in the value of reflection spectrum integral criteria in the diseased area. There were no statistically important differences of the integral criteria, calculated based on measurement results of reflection spectra on the boundary of depigmentation area before and after treatment. Most likely this is related to active processes of repigmentation in the skin in the course of the treatment.
For detailed study of identified phenomena there is a need for thorough study and expansion of the list of dermatologic diseases.
The purpose of the study – to study the effect of polyphenolic compounds extracted from the flowers of safflower oil and calendula, the functional activity of immune cells in cytotoxic immune suppression.
Conventional methods determined the total number of splenocytes, relative (%) and absolute (106), the number of antibody-forming cells (AFC) in the spleen of mice by local hemolysis by Cunningham.
Evaluated the effect of compounds of natural origin on the cellular immune response in the delayed-type hypersensitivity (DTH). Phagocytic activity of peritoneal macrophages was determined by the method based on the intensity of their capture ink particles. We studied the functional activity of peritoneal macrophages by NBT test (spontaneous and stimulated). Studies were conducted on male mice Category 1 (conventional linear mouse) line CBA/CaLac aged 2–2.5 months, weighing 20–22 g. After the introduction mice line CBA/CaLac of polyphenolic compounds derived from flowers of Carthamus tinctorius and flowers of Calendula officinalis L. during the 5-day course in dose 50 mg/kg was observed stimulation of the humoral immune response (total number of splenocytes, the number of antibodies in the spleen cells) and the functional activity of macrophages and Immunomodulating effect on the humoral immunity and the functional activity of macrophages after a single injection of cyclophosphamide in dose 250 mg/kg. Immunotropic activity of polyphenolic compounds is higher than that those of the reference product of tincture of Echinacea purpurea.
Histochrome is the medicinal form of echinochrome (2, 3, 5, 6, 8-pentahydroxy-7-ethyl-1,4-naphthoquinone). Arisen during clinical application of the drug questions concerning its biotransformation have predetermined the aim of this research: to study participation liver monooxygenase system in maintenance of histochrome’s pharmacological activity.
Simple and informative method of the lifetime control of liver monooxygenase systems influence on a metabolism of a medical product is the estimation of changes of pharmacological effect of a r esearched preparation on a background microsomal oxidations i nhibitor. In experiments on rats chloramphenicol action on diuretic effect of histochrome, as the most convenient for screening, was i nvestigated.
To control group of animals during 10 days were hypodermically entered by histochrome in a doze of 10 mg/kg (n = 15). Experimental animals preliminary oral received 50 mg/kg of chloramphenicol before three hours of histochrome introduction (n = 16). In both groups of animals measured volume daily excretion of water, creathinin, sodium and potassium ions excretions in experimental rats each two days. The initial level of parameters of excretory kidneys functions were estimated before introduction of preparations at animals.
Long-term histochrome’s injection was followed by a fivefold increasing of water excretion and simultaneously creathinin growth one. Allocation of ions of sodium was statistically significantly increased by 11-th day of experiment, and potassium ions – since the ninth day of histochrome injection. In conditions preliminary chloramphenicol applications volume daily daily urine output and creathinin excretion were essentially less control parameters. Allocation with urine of ions of sodium was decreased almost twice in comparison with the values, fixed at introduction histochrome. Excretion potassium ions ware corresponded to an initial level during all period of supervision.
Taking into account, that chloramphenicol is powerful inhibitor of microsomal oxidations in a liver, it was logical to assume, that excretion functions decrease of kidneys was connected to oppression of the echinochrome metabolism, and the diuretic effect of a preparation was caused not so much primary substance, how many of its metabolism products. Most likely, echinochrome metabolite raises speed glomerular filtrations, providing diuretic reaction of a preparation.
Autoimmune oophoritis (AO) is characterized by damage of generative and endocrine elements of the ovaries and leads to the formation of secondary insufficiency of the gonads. A question about the use of glucocorticoids (GC) for the correction of AO remains debatable.
Objective: to study the electron-microscopic changes of structural-tissue cells in autoimmune ovariano ophoritis and after its correction by glucocorticoids in the experiment.
The material. The experiment was performed on outbred white Mature rats-female. The main group of animals (12 rats) were simulated AO by intra-peritoneal introduction of antigens of ovarian. At 5th day prednisolone was injected to rats («Nycomed», Austria) in the dose of 3 mg/kg of body weight intramuscularly 14-day course. A comparison group (12 rats) were the animals with the model AO no course Ledger therapy. Controlintact rats (6 animals). Taking of the material was carried out by the 20th and the 60th day.
Methods. The study of the ultrastructure ovaries were performed using transmission electron microscopy. The material was fixed 2.5% glutaraldehyde, postfixed in 2% solution of osmium tetroxide, dehydrated in ethyl alcohols rising concentration and placed in a mixture of resins Epon-Araldite. Sections were prepared on Ultrotom III (LKB, Sweden). To view the drugs used an electron microscope JEM-7A (Japan). Results. On the 20th day of the pilot AO there are significant ultrastructural changes of vessels, concerning mainly endothelial layer. Degenerative and destructive changes affected endocrinocytes in the composition of the libraries and granular, овоциты majority of antral follicles. The 60-day pathologic processes involved and preantral follicles in the medulla develop perivascular fibrosis-sclerotic changes. Holding GC therapy on the 5th day AO reduces ultrastructural breach the walls of blood vessels, limits migration of immune cells in the home defeat on the 20th day. By the 60th day in the conditions of the restored the blood tissue transport is the formation of full-fledged generative elements, confirmed by the results of electron microscopy study.
Conclusion. The obtained experimental data are demonstrated the therapeutic efficacy of the GC-therapy in the early stages of AO.
INNOVATIVE MEDICAL TECHNOLOGIES
Aim of the study. We have compared in patients with carotid atherosclerosis the patterns of contrast enhancement of atherosclerotic plaque with presence of cerebral stroke, by using of high-resolution contrast-enhanced carotid MRI.
Material and methods. The patients 'population comprised 26 persons with either monolateral (14 pts) or bilateral (12 pts) stenosis of internal carotid artery for over 70% of lumen. In 15 (10-monolateral, 5 bilateral stenosis) there was recent stroke in acute or subacute stage, whereas 11 were symptom-free. In everybody contrast-enhanced study of atherosclerotic plaque was carried out with T1-w high-resolution MRI (paramagnetic as 2 ml of 0.5 mol solution per 10 kg of BW).
Results and discussion. In control persons there was a mild increase in T1-w intensity of arterial wall of carotids? With IE not more than 1.08. In patients without stroke there was moderate increase in plaque T-1w intensity up to 1.14 ± 0.07. In ishaemic stroke patients there was significant rise in intensity of T1-w of homolateral plaque (IE = 1.35 ± 0.06), and also of T1-w of arterial wall as whole (IE = 1.19 ± 0.05).
Conclusion. Further detailed study of high-resolution MRI of carotids is worth in order to obtain better imaging of atherosclerotic lesions and also better evaluation of risk of stroke in patients suitable for carotid endarterectomy.
The aim of this study were to develop a radionuclide method for quantitative estimation of the myocardial blood flow (MBF). Twelve patients with suspected coronary artery disease underwent both Tc-99mmethoxyisobutylisonitrile (MIBI) imaging and coronary arterial injection of Tc-99m-radioalbumin macroaggregates (MAA). The myocardial uptake and MBF obtained using radionuclide angiocardiography and relative distributions of Tc-99m-MIBI were compared with the obtained using whole body with MAA as the gold standard. The myocardial uptake and MBF measured by MIBI imaging showed a good linear correlation with the myocardial uptake and MBF measured by MAA. These results indicate that MBF may be estimated by Tc-99m-MIBI imaging and can be used for the early detection and estimation of the functional severity of coronary lesions.
HUMANITARIAN PROBLEMS OF BIOLOGY AND MEDICINE
Objective: To describe the ethical concept of the fetus as a patient and identify its implications for the deliberative practice of perinatal medicine.
Methods: We describe secular medical ethics and its two fundamental principles, beneficence and respect for autonomy. We articulate the ethical concept of the fetus as a patient on the basis of the ethical principle of beneficence.
Results: In the deliberative practice of perinatal medicine guided by the ethical concept of the fetus as a patient, the perinatologist should always identify and balance beneficence-based obligations to the fetal patient and beneficence-based and autonomy-based obligations to the pregnant patient. Directive counseling is appropriate when the fetus is a patient. Non-directive counseling is appropriate when the fetus is not a patient.
Conclusion: Counseling pregnant women about the clinical management of their pregnancies should always identify and balance beneficence-based obligations to the fetal patient and beneficence-based and autonomy-based obligations to the pregnant patient.
METODOLOGICAL SEMINAR
LITERATURE REVIEW
The absence of an ideal medicine for the treatment of patients with type 2 diabetes, that would be able to provide not only high quality and constant monitoring of glycemia without increasing body weight, with no risk of hypoglycemia, with no negative impact on the heart, kidneys, liver, but could also ensure the preservation of the secretory function of β-cells, makes scientists continue to search for new opportunities to influence the occurrence and progression of T2D.
Gastric inhibitory polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) are the two primary incretin hormones secreted from the intestine on ingestion of glucose or nutrients to stimulate insulin secretion from pancreatic β-cells. Within the pancreas, GIP and GLP-1 together promote β-cell proliferation and inhibit apoptosis, thereby expanding pancreatic β-cell mass, while GIP enhances postprandial glucagon response and GLP-1 suppresses it. In adipose tissues, GIP but not GLP-1 facilitates fat deposition. In bone, GIP promotes bone formation while GLP-1 inhibits bone absorption. In the brain, both GIP and GLP-1 are thought to be involved in memory formation as well as the control of appetite. In addition to these differences, secretion of GIP and GLP-1 and their insulinotropic effects on β-cells have been shown to differ in patients with type 2 diabetes compared to healthy subjects.
Enteroinsulin hormones' role in the development of gestational disorder of carbohydrate metabolism is poorly understood.
In a review article we analyze the publications that summarize what is known about the pancreatic and extra-pancreatic GIP and GLP-1-effects compared with healthy subjects and type 2 diabetes patients. The aspects of gestational diabetes pathophysiology and the perspectives for studying enteroinsulin hormonal system during pregnancy are also discussed in the article.
МОЛОДЫЕ ИССЛЕДОВАТЕЛИ – МЕДИЦИНЕ
SIGNIFICANT EVENTS AND THE ROLE OF PERSONALITY IN THE HISTORY OF MEDICAL SCIENCE
This publication is devoted to the personality and creative designs of uncommon American scientist, the engineer and the inventor – Norman Jefferis «Jeff» Holter. Norman Jefferis Holter introduced the terminology of «nuclear medicine» for the name of the new at that time area which associated with employment of the achievements of the nuclear physics in the medical goals. Also he is the author of ambulatory cardiological monitoring.
JUBILEES
To 70th birthday
To 60 year career anniversary
MEMORY
ISSN 1819-3684 (Online)