scholarly journals Characterization of Са2+,Мg2+-ATPase of blood lymphocytes in women with ovarian cancer

2018 ◽  
Vol 9 (1) ◽  
pp. 85-89 ◽  
Author(s):  
R. V. Barylyak ◽  
U. P. Iefremova ◽  
O. K. Onufrovych ◽  
O. V. Melnyk ◽  
D. Z. Vorobets ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Plasma Membrane ◽  
Atpase Activity ◽  
Affinity Constant ◽  
Control Group ◽  
Cancer Stage ◽  
Age Group ◽  
Extracellular Medium ◽  
Blood Lymphocytes ◽  
Healthy Women

Ionized Ca2+ is crucial for regulation of practically all intracellular processes, including tumor growth, cell proliferation, apoptosis, etc. The plasma membrane Ca2+,Mg2+-ATPase plays an important role in maintaining intracellular Ca2+ homeostasis. The function of this enzyme is to reduce the Ca2+ concentration in the cytosol, namely its transport against a concentration gradient in the extracellular medium. We have investigated the activity of plasma membrane Ca2+,Mg2+-ATPase of lymphocytes of practically (clinically) healthy women of different age groups and also patients with ovarian cancer stage III and IV. It was found that the enzyme activity in women of the older age group was not significantly reduced in relation to the activity of the younger age group. Thus, the value of the maximum rate of ATP hydrolysis by plasma membrane Ca2+,Mg2+-ATPase of blood lymphocytes in practically healthy women under the conditions of physiological norm was 1.1 times higher than under of pre-nosological state. In patients with ovarian cancer (stages III and IV), plasma membrane Ca2+,Mg2+-ATPase activity of blood lymphocytes significantly differed from the physiological norm and decreased by 1.6 and 1.8 times, compared with the physiological norm. The decrease of the plasma membrane Ca2+,Mg2+-ATPase activity of blood lymphocytes in patients with ovarian cancer indicates an increase of Ca2+ in the cytosol of lymphocytes. Determination of affinity constants showed that these values were in the submillimolar range of concentration, corresponding to the physiological concentration in the cell cytoplasm (0.5–5.0 mM). In healthy persons, under the condition of physiological norm, the affinity constant of plasma membrane Сa2+,Mg2+-ATPase to the ATP was 0.16 ± 0.02 mM and at pre-nosological state – 0.19 ± 0.02 mM. The affinity constant of plasma membrane Сa2+,Mg2+-ATPase of lymphocytes to ATP in patients with ovarian cancer (stage ІІІ) was 0.32 ± 0.03 mM and with ovarian cancer (stage IV) 0.35 ± 0.03 mM. That is, the affinity constant of plasma membrane Ca2+,Mg2+-ATPase of lymphocytes to ATP in patients with ovarian cancer was 2.0–2.1 times higher than this value for the blood lymphocytes in the control group (physiological norm). The kinetic analysis of Ca2+-activated, Mg2+-dependent hydrolysis of ATP in blood lymphocytes in women showed that the decrease in the activity of Ca2+,Mg2+-ATPase was due to a decrease in the affinity of the enzyme to the substrate (KATP increases 2-fold).

scholarly journals Evaluation the levels of some hormones in women with polycystic ovary syndrome

2019 ◽  
Vol 24 (5) ◽  
pp. 25
Author(s):  
Namareq Ata allah Mohemeed1 ◽  
Firas Shawki Abdul-razzak2
Keyword(s):  
Menstrual Cycle ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Follicle Stimulating Hormone ◽  
Control Group ◽  
Age Group ◽  
Ovary Syndrome ◽  
Blood Samples ◽  
Healthy Women ◽  
Stimulating Hormone

This study was conducted on 40 Samples of Patients with polycystic ovary syndrome (PCOS) after their diagnosis, The study aimed to identify the most important  hormonal disorders associated  with  this syndrome . The study begins from Octobar 2017 to March 2018 , the age from(19-45) years .Blood samples were taken during the (2-4( days of menstrual cycle and the selected samples were compared with 20 healthy women as control group ,and the following hormones were evaluated Luteninzing hormone (LH), Follicle Stimulating Hormone (FSH), Prolactin (PRL),Testosterone (Testo) and Oxytocin (OX) ,the study showed a high significant in the concentrations of OX ,Testo and LH (P≤0.01) , a high significant in the PRL concentration (P≤0.05) and a high significant in the FSH concentration (P≤0.05(,the results were distributed to three groups according to BMI ,age and treatment, in term BMI it was divided into three groups, BMI(18.5-24.9)(25.0-29.9) (≥30)kg/m2 the results showed a high significant (P≤0.05)  in the LH and OX concentration in  group BMI (18.5-24.9)kg/m2 and in both PRL and Testo in group BMI(≥30)kg/m2. in term age, it was divided into three groups (19-26) (27-35) (36-45)years, the results showed a high significant (P≤0.05) in LH  and Testo concentration at age group (36-45)years ,compared to other groups, and a high significant (P≤0.05) in both PRL and OX, between three group of age , treatment it was divided  into three groups of metformin, progesterone contraceptive used and non-used of the treatment .the results showed a high significant (P≤0.05) in LH, PRL, OX and Testo concentrations, and a high significant (P≤0.05) of FSH in women treated compared with non-used  .   http://dx.doi.org/10.25130/tjps.24.2019.085

scholarly journals Conformational changes during the reaction cycle of Plasma Membrane Ca2+-ATPase in the autoinhibited and activated states

2021 ◽  
Author(s):  
Nicolás A Saffioti ◽  
Marilina de Sautu ◽  
Ana Sol Riesco ◽  
Mariela Soledad Ferreira-Gomes ◽  
Juan Pablo F.C. Rossi ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Atpase Activity ◽  
Binding Site ◽  
Conformational Changes ◽  
Ground State ◽  
Binding Pocket ◽  
Product State ◽  
Extracellular Medium ◽  
Reaction Cycle ◽  
Calmodulin Binding

Plasma membrane Ca2+-ATPase (PMCA) transports Ca2+ by a reaction cycle including phosphorylated intermediates. Calmodulin binding to the C-terminal tail disrupts autoinhibitory interactions, activating the pump. To assess the conformational changes during the reaction cycle, we studied the structure of different PMCA states using a fluorescent probe, hydrophobic photolabeling, controlled proteolysis and Ca2+-ATPase activity.  Our results show that calmodulin binds to E2P-like states, and during dephosphorylation, the hydrophobicity in the nucleotide-binding pocket decreases and the Ca2+ binding site becomes inaccessible to the extracellular medium. Autoinhibitory interactions are disrupted in E1Ca and in the E2P ground state whereas they are stabilized in the E2∙Pi product state. Finally, we propose a model that describes the conformational changes during the Ca2+ transport of PMCA.

scholarly journals Властивості Na+ , K+ -активованої, Mg2+ -залежної АТФ-гідролази лімфоцитів крові у хворих на реактивний артрит

2013 ◽  
Vol 4 (2) ◽  
pp. 57-62
Author(s):  
O.V. Melnyk ◽  
O.P. Kornijchuk ◽  
O.I. Pershyn ◽  
Z.D. Vorobets
Keyword(s):  
Atpase Activity ◽  
Peripheral Blood ◽  
Peripheral Blood Lymphocytes ◽  
Immunocompetent Cells ◽  
Affinity Constant ◽  
Kinetic Properties ◽  
Blood Lymphocytes ◽  
Healthy Donors ◽  
Immunological Mechanisms ◽  
The Impact

A significant role in the development and course of reactive arthritis (ReA) is played by T-lymphocytes as their development and systemic manifestations are based on immunological mechanisms. Additionally, the pathogenesis of many diseases is linked to changes in the structure and function of ion-transporting systems. Therefore, the aim of the study was to find out the kinetic properties of ATP-hydrolysis reaction involving Na+,K+-ATPase of peripheral blood lymphocytes of healthy individuals and patients with ReA. We used the current methodological approaches to the study of ATPase activity in saponin permeabilized cells. We conducted an analysis of the kinetic properties of ouabainsensitive Na+,K+-ATPase activity of saponin-perforated peripheral blood lymphocytes of healthy donors and patients with rheumatoid arthritis (RеA). We found out that in peripheral blood lymphocytes of patients with RеA primary active transport of Na+, K+ ions is slower and less intensive, though characterised by the same capacity, as in healthy donors. The affinity constant for ATP in peripheral blood lymphocytes in patients with RеA is greater by 2.9 times than its value in comparison with healthy donors. We established that in conditions of rheumatic pathology in immunocompetent cells, inhibition of Na+,K+-ATPase activity is not caused by reduction of speed of enzyme work, but by increase of affinity of ouabainsensitive Na+,K+-ATPase to ATP. At the same time, the Mg2+-binding center of Na+,K+-ATPase in patients with RеA is endogenous. We also found that affinity Na+,K+-ATPase to the ions K+ in peripheral blood lymphocytes of healthy donors is 2.4 times higher than in patients with RеA. We observed that Na+,K+-ATPase of peripheral blood lymphocytes of patients with RеA retains its endogenous receptor properties – sensitivity to ouabain does not change. It is assumed that under conditions of rheumatic pathology the impact on the Na+,K+-ATPase structure occurs both externally and on the cytoplasmic membrane surface. The above experimental data can be used for further clarification of the membrane mechanisms of ion exchange in immunocompetent cells of patients suffering from autoimmune diseases.

scholarly journals Soluble forms of immune checkpoint receptor PD-1 and its ligand PD-L1 in plasma of patients with ovarian neoplasms

2018 ◽  
Vol 46 (7) ◽  
pp. 690-698 ◽  
Author(s):  
E. S. Gershtein ◽  
D. O. Utkin ◽  
I. O. Goryacheva ◽  
M. M. Khulamkhanova ◽  
N. A. Petrikova ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Cancer Patients ◽  
Immune Checkpoint ◽  
Treatment Efficacy ◽  
Ovarian Neoplasms ◽  
Autoimmune Response ◽  
Disease Stage ◽  
Benign Tumors ◽  
Control Group ◽  
Healthy Women

Background:Ovarian cancer is one of the most common oncologic diseases holding the frst place in mortality related to neoplasms of female genitalia. Along with active surgical intervention, contemporary ovarian cancer treatment includes various chemotherapeutic regimens which in many cases are quite effective, but relapse and death rates still remain high. In the recent years, major attention has been paid to the possibility of ovarian cancer immunotherapy associated with the discovery of the so-called “immune checkpoint” signaling, i.e. programmed cell death-1 / programmed death-ligand 1 (PD-1/PD-L) pathway, controlling intensity and duration of autoimmune response at physiologic conditions. Tumor PD-1 and/or PD-L1 expression is being actively studied as a predictor of anti-PD-1/PD-L treatment efficacy; however, this approach has certain limitations and problems that might be probably bypassed by determination of soluble PD-1 (sPD-1) and its ligand (sPD-L1) in serum or plasma.Aim:Comparative evaluation of sPD-1 and sPD-L1 content in plasma of healthy women and of patients with benign or borderline ovarian tumors and ovarian cancer, as well as the analysis of associations between these markers and main clinical and pathologic characteristics of ovarian cancer.Materials and methods:Sixty two (62) patients with ovarian neoplasms aged 32 to 77 (median, 56.5) years were enrolled into the study. Fifteen (15) patients had benign tumors, 9 had borderline, and 38, ovarian cancer. The control group included 17 healthy women aged 24 to 67 (median, 49) years. Plasma sPD-L1 and sPD-1 concentrations were measured with standard enzyme immunoassay kits (Afmetrix, eBioscience, USA).Results:Plasma sPD-L1 and sPD-1 levels in ovarian cancer patients (median, 41.3 and 48.0 pg/ml, respectively) did not differ significantly from those in the control group (49.5 and 43.8 pg/ml). sPD-L1 level in the patients with benign tumors (median, 22.2 pg/ml) was signifcantly lower than in the control (p < 0.01). The lowest sPD-1 level in plasma was found in the patients with borderline ovarian neoplasms, the difference with the ovarian cancer group being statistically signifcant (p < 0.05). No correlations between sPD-L1 and sPD-1 plasma levels were found in any of the study groups. sPD-L1 level signifcantly increased with disease stage (R = 0.44; p < 0.01), the most signifcant increase being observed at the most advanced IIIC stage (p < 0.05 as compared to all other stages). sPD-L1 was also signifcantly higher in the patients with ascites than in those without ascites. Plasma sPD-1 concentration was not associated with the indices of ovarian cancer progression, though its median was 1.3–1.44 times lower in the stage I than in the stage II–III patients, and decreased in those with the tumor size above 10 cm (assessed by ultrasound examination) and in the patients with ascites. No statistically signifcant associations of the markers' levels with tumor histological type and differentiation grade of ovarian cancer were found.Conclusion:sPD-L1 level in ovarian cancer patients correlates with disease progression and can be considered as a promising marker for monitoring of anti-PD-1/PD-L1 treatment efficacy. Potential clinical implications of sPD-1 require further studies.

scholarly journals Peripheral blood erythrocytes morphology in ovarian cancer

2019 ◽  
Vol 100 (5) ◽  
pp. 855-859
Author(s):  
A Yu Fedotova ◽  
T P Gening ◽  
T V Abakumova ◽  
D R Dolgova
Keyword(s):  
Ovarian Cancer ◽  
Red Blood Cells ◽  
Peripheral Blood ◽  
Blood Cells ◽  
Stage Iii ◽  
Control Group ◽  
Healthy Women ◽  
Morphological Studies ◽  
Gynecology And Obstetrics ◽  
Erythrocyte Rigidity

Aim. To assess the morphology of circulating red blood cells in patients with stage III ovarian cancer. Methods. The object of the study was the peripheral blood erythrocytes of primary patients with ovarian cancer (n=25) who had stage III according to International Federation of Gynecology and Obstetrics. Patients were examined in the gynecological department of Ulyanovsk Regional Clinical Oncology Center. The control group included 25 somatically healthy women. Morphological studies were performed using light microscopy. The number of red blood cells with an unchanged and altered shape was expressed as a percentage. By the method of atomic force microscopy, the topology and rigidity of red blood cells was studied. Results. A statistically significant decrease in the number of circulating blood erythrocytes was found in patients with ovarian cancer compared to somatically healthy women. At the same time, the number of discocytes is markedly reduced while the number of morphologically altered forms: echinocytes, stomatocytes, spherocytes and erythrocyte rigidity are increased. Conclusion. With the appearance of altered forms of red blood cells and increase of the transformation index and erythrocyte rigidity in patients with stage III ovarian cancer, total number of red blood cells decreases in circulating blood compared to somatically healthy women.

Localization of Adenosine Triphosphatase Activity in the Phleom of Nicotiana Tabacum

1972 ◽  
Vol 30 ◽  
pp. 230-231
Author(s):  
James Cronshaw ◽  
Jamison E. Gilder
Keyword(s):  
Plasma Membrane ◽  
Atpase Activity ◽  
Adenosine Triphosphatase ◽  
Higher Plants ◽  
High Surface ◽  
Root Tip ◽  
Animal Cells ◽  
Physiological Processes ◽  
Tip Cells ◽  
Atpase Localization

Adenosine triphosphatase (ATPase) activity has been shown to be associated with numerous physiological processes in both plants and animal cells. Biochemical studies have shown that in higher plants ATPase activity is high in cell wall preparations and is associated with the plasma membrane, nuclei, mitochondria, chloroplasts and lysosomes. However, there have been only a few ATPase localization studies of higher plants at the electron microscope level. Poux (1967) demonstrated ATPase activity associated with most cellular organelles in the protoderm cells of Cucumis roots. Hall (1971) has demonstrated ATPase activity in root tip cells of Zea mays. There was high surface activity largely associated with the plasma membrane and plasmodesmata. ATPase activity was also demonstrated in mitochondria, dictyosomes, endoplasmic reticulum and plastids.

A STUDY OF SERUM URIC ACID LEVELS IN PREECLAMPSIA

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Sushma Goad ◽  
Anita Verma ◽  
Subhash Chandra
Keyword(s):  
Uric Acid ◽  
Serum Uric Acid ◽  
Uric Acid Level ◽  
Acid Level ◽  
Serum Uric Acid Level ◽  
Control Group ◽  
Age Group ◽  
Hypertensive Disorders Of Pregnancy ◽  
Level Elevation ◽  
The Mean

Background: To Study Serum Uric Acid level elevation in Hypertensive Disorders of Pregnancy. Methods: 50 Patients diagnosed as having Pre-eclampsia with age between 18-37 years and 50 controls with similar age group. Results: The mean serum uric acid level in control group was 3.41 ± 0.62 and in patient 7.01 ± 0.58 which was statistically significant (p =0.001). Conclusion: Serum uric acid levels were significantly higher in preeclampsia could be a useful indicator of fetal complication in preeclampsia patients. Keywords: serum uric acid, preeclampsia, laboratory.

Features of the ovarian reserve of women of reproductive age suffering from autoimmune diseases

GYNECOLOGY ◽  
2020 ◽  
Vol 22 (5) ◽  
pp. 27-30
Author(s):  
Elena N. Andreeva ◽  
Olga R. Grigoryan ◽  
Yulia S. Absatarova ◽  
Irina S. Yarovaya ◽  
Robert K. Mikheev
Keyword(s):  
Type 1 Diabetes ◽  
Thyroid Gland ◽  
Autoimmune Diseases ◽  
Ovarian Reserve ◽  
Reproductive Potential ◽  
Reproductive Age ◽  
Control Group ◽  
Antithyroid Antibodies ◽  
Healthy Women

The reproductive potential of a woman depends on indicators of the ovarian reserve, such as the anti-Muller hormone (AMH) and the number of antral follicles (NAF). Autoimmune diseases have a significant effect on fertility and contribute to the development of premature ovarian failure. Aim.To evaluate the parameters of the ovarian reserve in patients with type 1 diabetes mellitus, carriers of antibodies to the thyroid gland in a state of euthyroidism and compare them with similar parameters in healthy women. Materials and methods.In the first block of the study, the level of AMH, follicle-stimulating hormone, luteinizing hormone, NAF was studied among 224 women with diabetes and 230 healthy women in the control group. In block II, the level of the above hormonal indices was studied in 35 carriers of antithyroid antibodies in the state of euthyroidism and 35 healthy women. Results.In patients with type 1 diabetes, the level of AMH, NAF was statistically significantly lower when compared with the control group. Among carriers of antithyroid antibodies and healthy women, no difference in AMH and NAF was found. Conclusion.The autoimmune processes accompanying diabetes are more influenced by the ovarian reserve indices than autoimmune aggression to the tissues of the thyroid gland.

Can Osteopontin Be Considered a Biomarker for Endometriosis?

2017 ◽  
Vol 68 (9) ◽  
pp. 2132-2134
Author(s):  
Daniela Roxana Albu (Matasariu) ◽  
Elena Mihalceanu ◽  
Alina Pangal ◽  
Carmen Vulpoi ◽  
Mircea Onofriescu ◽  
...  
Keyword(s):  
Serum Level ◽  
Immunosorbent Assay ◽  
Pelvic Pain ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Multifactorial Disease ◽  
Elisa Kit ◽  
Healthy Women ◽  
Progesterone Treatment ◽  
Large Dispersion

Endometriosis is a multifactorial disease that is manifested by infertility and pelvic pain. The purpose of the study was to evaluate the effect of progesterone treatment on the serum level of osteopontin, a multipotent cytokine, in patients with endometriosis. The study was prospective and we evaluated osteopontin levels that were measured in the serum of 40 patients with endometriosis and 12 healthy women using a standardized Enzyme-Linked Immunosorbent Assay (ELISA) kit. Osteopontin seric levels were lower in endometriosis patients and increased after progesterone treatment. Because of the large dispersion of data even in the control group, we find the association between osteopontin and endometriosis questionable.

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