New view on the compatibility of hemoglobin function in the erythrocytes.

OBJECTIVE: Aim: To study the process of hemoglobin oxidation and the enzymatic reactions associated with it. PATIENTS AND METHODS: Materials and Methods: Heparinized human blood (15 IU/ml) was obtained from the clinical department. The concentration of oxy- and methemoglobin, auto-oxidation of hemoglobin was determined spectrophotometrically spectrophotometrically. Autooxidation of hemoglobin was recorded spectrophotometrically, and protein concentration was determined by the Lowry method. Monooxygenase activity of hemoglobin was also measured by the method described by Lowry spectrophotometrically. The concentration of O2 and H2O2 in the reaction media was determined on a biomicroanalyzer OR 210/3 (Redelkis). RESULTS: Results: The obtained experimental data allow us to propose a mechanism of "spontaneous autooxidation" of oxyhemoglobin, which can be described by the following equations: Hb2+O2 → Hb3+ + O2 - (1) Hb2+O2 + 2e - + 2H+ →Hb3+ + H2O2 (2) Hb2+O2 + 2e - + 2H+ →Hb2+ + H2O2 (3) Hb2+ + O2 →Hb2+O2 (4) Spectral characteristics of the process of "spontaneous auto-oxidation" indicate the formation of a metform of hemoglobin, the depletion of oxygen by the system was established, at pH 5.6, an increase in the monooxygenase activity of hemoglobin is observed 3-4 times compared to the physiological level. CONCLUSION: Сonclusions: In addition to the main, previously known functions of hemoglobin (gas transport, peroxidase, monooxygenase), it catalyzes a two-electron oxidase reaction in which O2 is reduced to H2O2. This is confirmed by experimental data on the formation of one of the products of "spontaneous autoxidation" of oxyhemoglobin _ deoxyform at pH 5.6 _ 8.9.

THE ROLE OF LEPTINRESISTANCE IN THE PATHOGENESIS OF OBESITY IN PREGNANT WOMEN.

OBJECTIVE: The aim: To investigate the relationship between leptin resistance, lipid and carbohydrate metabolism, blood pressure in obese pregnant women. PATIENTS AND METHODS: Materials and methods: Under observation were 65 women (main group) with obesity (I degree -27 women, II degree - 24 women, III degree - 14 women) in the II trimester of pregnancy, who were hospitalized in the Department of Pathology of Pregnancy KNP «Maternity Clinical house №1 "in Lviv during 2017-2020 on preeclampsia of varying severity, which were sent for inpatient treatment by women's clinics. The control group consisted of 30 healthy pregnant women without obesity. RESULTS: Results: Serum leptin in obese women was directly correlated with BMI (r = 0.66, p<0.001), body weight (r = 0.29, p<0.05), total cholesterol (cholesterol) (r = 0, 37, p<0,009), low density lipoproteins (LDL cholesterol) (r = 0.33, p<0.05) and inversely with high density particles (HDL cholesterol) (r = -0.37, p<0.02 ). Studies of carbohydrate metabolism indicate the following correlation coefficients of BMI with glucose level r = 0.351; p<0,001, BMI with the level of C-peptide r = 0,450; p<0,001, BMI with HOMA index r = 0,1504; p = 0.036. Inverse correlations of C-peptide were detected with the level of P (r = -0.169; p = 0.025). CONCLUSION: Conclusions: The discovery of the relationship between leptin resistance, lipid and carbohydrate metabolism, blood pressure indicates the possibility of using signs of leptin resistance to prevent complications during pregnancy in the second trimester.

HISTORY OF BIOCHEMISTRY IN LVIV.

OBJECTIVE: The aim: The purpose of this literature review is to shed light on the development of biochemical knowledge in the Lviv region and on prominent figures in the development of biochemistry during the Second World War. PATIENTS AND METHODS: Materials and methods: Review of literature published before 2020. We searched the literature using the search terms 'biochemists', ' Lviv National Medical University', 'second World War'. CONCLUSION: Conclusions: The development of biological research in Lviv can be divided into two historical stages: 1) from the beginning of the founding of Lviv University in 1661 to the First World War; 2) between the First and Second World Wars and after the Second World War. Biochemical research was initiated at the Medical Faculty of Lviv University. In 1939, the Lviv State Medical Institute was established on the basis of the Medical Faculty of the University, where a powerful department of biochemistry functioned, which was headed by a worldclass biochemist - Jakub Parnas.