Compact and Loosely Bound Structures in Light Nuclei

A role of different components in the wave function of the weakly bound light nuclei states was studied within the framework of the cluster model, taking into account of orbitals "polarization". It was shown that a limited number of structures associated with the different modes of nucleon motion can be of great importance for such systems. Examples of simple and quite flexible trial wave functions are given for the nuclei $^8$Be, $^6$He. Expressions for the microscopic wave functions of these nuclei were found and used for the calculation of basic nuclear characteristics, using well known central-exchange nucleon-nucleon potentials.Comment: 19 pages, 3 ps figure

Hippocampal neurogenesis in the new model of global cerebral ischemia

The study aimed to evaluate the changes of hippocampal neurogenesis in a new model of global transient cerebral ischemia which was performed by the occlusion of the three main vessels (tr. brachiocephalicus, a. subclavia sinistra, and a. carotis communis sinistra) branching from the aortic arch and supplying the brain. Global transitory cerebral ischemia was modeled on male rats (weight = 250–300 g) under chloral hydrate with artificial lung ventilation. Animals after the same surgical operation without vessel occlusion served as sham-operated controls. The number of DCX-positive (doublecortin, the marker of immature neurons) cells in dentate gyrus (DG) and CA1-CA3 fields of hippocampus was counted at the 31st day after ischemia modeling. It was revealed that global cerebral ischemia decreased neurogenesis in dentate gyrus in comparison with the sham-operated group (P<0.05) while neurogenesis in CA1-CA3 fields was increased as compared to the control (P<0.05)

Isolated carcinomatosis of the abdominal cavity in women: the features of immunophenotypes and morphometric parameters.

Patients with isolated abdominal carcinomatosis are traditionally treated similarly to patients with ovarian cancer stage III/IV. Despite histological, molecular and clinical similarities, this approach leaves no room for studying the individual biology of this phenotype of cancer of unknown primary localization. In addition, some metastases of gastrointestinal, pancreatic-biliary or endometrial adenocarcinomas simulate the histological and/or immunohistochemical (IHC) characteristics of primary ovarian adenocarcinomas. Over the past three decades, understanding the biology and pathways of intra-abdominal dissemination of tumors, taking into account the protective function of the peritoneal barrier against further tumor spreading, has led many researchers to consider the concept of peritoneal carcinomatosis as a locoregional disease. In the absence of other systemic metastases, new multimodal approaches combining aggressive cytoreductive surgery, intraperitoneal hyperthermia chemotherapy, and systemic chemotherapy are considered promising for improving disease control and increasing survival. Materials and methods. A retrospective analysis of clinical data, histological and IHC characteristics of biopsy material of 24 women with isolated abdominal carcinomatosis at the age of 28 to 81 years (mean 56.29±14.68, median 58.5) and 46 cases of primary ovarian tumors of women at the age of 27 to 76 years (mean 52.17±12.72, median 53.5), was performed to determine differential diagnostic criteria. IHC profile of primary ovarian tumors determined the most specific markers of cytokeratin C7 and CA125 (mucin 16), which in 43 out of 46 (93.48%) and 37 of 46 (80.43%) were respectively positive at least partially. It should be noted that 1 undifferentiated carcinoma was negative for both markers, only for SC7-2 mucinous adenocarcinomas and 1 low-grade, but only for CA125-2 endometrioid, 2 light-celled, 1 undifferentiated carcinoma and 4 low-grade adenocarcinomas (the latter were regarded as primary in exclusion of other localizations on the basis of a complete survey). Receptors to estrogens were determined in 14 of 46 (30.43%) of observations, which indicates their prognostic, and not diagnostic significance. In the group of women with isolated carcinomatosis of the abdominal cavity, SK7 was identified in 21 of 24 (87.5%) observations, CA125 in 16 of 24 (66.67%), all of whom had SC7 immunoreactivity, but only 9 of them demonstrated the presence of estrogen receptors, and 6 – serous phenotype (WT-1+), and 1 – mesothelioma (CK7 +, calretinin +). It should be noted that CA125-partially positive tumor patterns were often mixed with undifferentiated and nopapillary tumor deposits. These women were older than of the entire subgroup (mean 61.4 ± 10.08, median 61), but without significant difference (p>0.05). Conclusions. Only 2/3 of the investigated cases of carcinomatosis without primary localization in women after IHC research can be convincingly attributed to ovarian metastases for the application of appropriate therapy. Other 33.33% percent in our study were divided into 1 - neuroendocrine cancer (Chromogranin +, Synaptophysin +), 3 - colorectal (CK20 + CDX2 +), 2 - moderately and 1 - low-grade carcinomas with doubtful immunophenotypes (CK20+/-CDX2-/+CK7-/+Vimentin -/+), as well as 1 mesothelioma

Isolated carcinomatosis of the abdominal cavity in women: the features of immunophenotypes and morphometric parameters.

Patients with isolated abdominal carcinomatosis are traditionally treated similarly to patients with ovarian cancer stage III/IV. Despite histological, molecular and clinical similarities, this approach leaves no room for studying the individual biology of this phenotype of cancer of unknown primary localization. In addition, some metastases of gastrointestinal, pancreatic-biliary or endometrial adenocarcinomas simulate the histological and/or immunohistochemical (IHC) characteristics of primary ovarian adenocarcinomas. Over the past three decades, understanding the biology and pathways of intra-abdominal dissemination of tumors, taking into account the protective function of the peritoneal barrier against further tumor spreading, has led many researchers to consider the concept of peritoneal carcinomatosis as a locoregional disease. In the absence of other systemic metastases, new multimodal approaches combining aggressive cytoreductive surgery, intraperitoneal hyperthermia chemotherapy, and systemic chemotherapy are considered promising for improving disease control and increasing survival. Materials and methods. A retrospective analysis of clinical data, histological and IHC characteristics of biopsy material of 24 women with isolated abdominal carcinomatosis at the age of 28 to 81 years (mean 56.29±14.68, median 58.5) and 46 cases of primary ovarian tumors of women at the age of 27 to 76 years (mean 52.17±12.72, median 53.5), was performed to determine differential diagnostic criteria. IHC profile of primary ovarian tumors determined the most specific markers of cytokeratin C7 and CA125 (mucin 16), which in 43 out of 46 (93.48%) and 37 of 46 (80.43%) were respectively positive at least partially. It should be noted that 1 undifferentiated carcinoma was negative for both markers, only for SC7-2 mucinous adenocarcinomas and 1 low-grade, but only for CA125-2 endometrioid, 2 light-celled, 1 undifferentiated carcinoma and 4 low-grade adenocarcinomas (the latter were regarded as primary in exclusion of other localizations on the basis of a complete survey). Receptors to estrogens were determined in 14 of 46 (30.43%) of observations, which indicates their prognostic, and not diagnostic significance. In the group of women with isolated carcinomatosis of the abdominal cavity, SK7 was identified in 21 of 24 (87.5%) observations, CA125 in 16 of 24 (66.67%), all of whom had SC7 immunoreactivity, but only 9 of them demonstrated the presence of estrogen receptors, and 6 – serous phenotype (WT-1+), and 1 – mesothelioma (CK7 +, calretinin +). It should be noted that CA125-partially positive tumor patterns were often mixed with undifferentiated and nopapillary tumor deposits. These women were older than of the entire subgroup (mean 61.4 ± 10.08, median 61), but without significant difference (p&gt;0.05). Conclusions. Only 2/3 of the investigated cases of carcinomatosis without primary localization in women after IHC research can be convincingly attributed to ovarian metastases for the application of appropriate therapy. Other 33.33% percent in our study were divided into 1 - neuroendocrine cancer (Chromogranin +, Synaptophysin +), 3 - colorectal (CK20 + CDX2 +), 2 - moderately and 1 - low-grade carcinomas with doubtful immunophenotypes (CK20+/-CDX2-/+CK7-/+Vimentin -/+), as well as 1 mesothelioma

DEPENDENCE OF NEUTROPHIL RESPIRATORY BURST ON THEIR METABOLIC STATE IN THE PATIENTS WITH ACUTE DESTRUCTIVE PANCREATITIS OF DIFFERENT SEVERITY

The aim of the study was to investigate a dependence of respiratory burst state in neutrophils on activities of their intracellular enzymes in patients with acute destructive pancreatitis (ADP) of different severity. The study included 50 patients with ADP of moderate (17 cases) and severe degree (33 cases). A group of 47 healthy people was examined as controls. The respiratory burst state was examined in neutrophilic granulocytes by means of chemiluminescence assays. A study of NAD(P)-dependent dehydrogenases activity in blood neutrophils was performed using bioluminescent analysis. We have revealed that a decrease in spontaneous and induced synthesis of superoxide radical by neutrophils was detected in ADP patients, independently of the disease severity. Kinetics of primary ROS synthesis was also impaired in patients with severe ADP. In patients with moderate disorder, the level of secondary ROS synthesis by neutrophils proved to be increased, whereas, in cases of severe disease, a disturbed kinetics of secondary ROS synthesis by neutrophils was detected at a resting state, showing increased synthetic level upon additional induction by zymosan. Metabolism of neutrophils in patients with ADP is characterized by activation of plastic processes (due to the products of the pentose phosphate cycle) and aerobic energy (increased substrate flow intensity in the cycle of tricarboxylic acids). However, NADPH neutrophilic pool in patients with moderate disorder could be additionally supported by enzymatic malic enzyme reactions and NADP-dependent glutamate dehydrogenase. Activation of peroxidation events in patients with severe ADP is revealed, which needs NADPH compensation. The state of energy processes in blood neutrophils in patients with ADP is characterized by lacking changes in glycolytic activity, and increased intensity of substrate flux along tricarboxylic acids cycle. Activity of aerobic processes in patients with moderate disease is maintained by the products of amino acid metabolism (via glutamate dehydrogenase), whereas, in severe ADP it may be provided by products of lipid catabolism. Using correlation analysis, a dependence of respiratory burst of neutrophils on the state of their metabolism was studied. We have found that intensity and kinetics of respiratory burst in the neutrophils of controls depends only on the activity of NADP-dependent dehydrogenases. The changes in cellular metabolic activity in the patients with moderate ADP led to disturbances of their regulatory effect upon the state of neutrophil respiratory burst. In patients with severe disorder, the degree a neutrophil respiratory burst is stimulated by reductive amination of α-ketoglutarate, being, however, inhibited by intracellular peroxidation processes

Hyporesponse to statin therapy among patients with acute coronary syndrome: prevalence, impact on the development of heart failure in a short-term follow-up

Aim. To study the prevalence of hyporesponse to statin therapy and its impact on the development of heart failure (HF) among patients after acute coronary syndrome (ACS) in a short-term follow-up.Material and methods. This retrospective analysis of outpatient medical records of 400 patients observed at the Omsk Clinical Cardiology Dispensary after ACS was carried out. Optimal medication therapy was prescribed as part of the preferential provision of medicines under the 1H Program, including high-dose atorvastatin therapy (80 mg/day). Low-density lipoprotein cholesterol (LDL-C) was assessed at baseline and 1 and 12 months after therapy. Hyporesponse to statins was defined as the percentage reduction in LDL-C 14; left atrial volume index &gt;34 ml/m2) function.Results. There were 107 patients with hyporesponse (26,8%). Depending on the initial response to therapy, patients were divided into two groups: group 1 (hyporesponse, n=107), group 2 (more pronounced response, n=293). After 1 month, patients in the hyporesponse group had a higher level of LDL-C — 2,4 [2,2; 2,9] mmol/l (Me [25; 75%]) vs 2,0 [1,7; 2,5] mmol/l (p&gt;0,05) in the second group. There was no difference in the prevalence of hospitalizations for recurrent ACS in the compared groups, as well as in the prevalence of new HF cases between groups.Conclusion. The prevalence of hyporesponse to statin therapy was 26,8%, which required correction of lipid-lowering therapy in order to prevent recurrent cardiovascular events. Given the pleiotropic effects of statins that can participate in HF pathogenesis, as well as the inconsistency of current research results, further prospective long-term studies are required

FUNCTIONAL ACTIVITY OF NEUTROPHILS AND HEMOSTASIS PATTERN IN PATIENTS WITH ACUTE DESTRUCTIVE PANCREATITIS

The aim of present study was to investigate relationships between indicators of functional activity of neutrophilic granulocytes, and hemostasis parameters in patients with acute destructive pancreatitis (ADP). The study included thirty-three patients with ADP. 35 healthy persons were examined as a control group. The phagocytosis level in neutrophils was determined by flow cytometry using FITC-labeled staphylococcal protein A. We have calculated the percentage of fluorescent neutrophils as phagocytic index, and average cell fluorescence assumed phagocytic number. The intensity of respiratory burst observed in neutrophil samples was evaluated using chemiluminescence assay. All the persons under study were also tested for blood coagulation and vascular-platelet hemostasis. It was found that the ADP patients with decreased number of phagocytic neutrophils in the blood showed a decrease in respiratory burst intensity in the neutrophils. Moreover, spontaneous and induced synthesis of the primary reactive oxygen species (ROS) in neutrophils of ADP patients proceeded faster than in healthy people, but its intensity was much lower. The maximal level of spontaneous and induced synthesis of secondary ROS in neutrophils of patients was significantly higher than in healthy individuals, but its rapid may be generally characterized by insufficient respiratory burst in these patients. A reduced neutrophil phagocytic activity and kinetic characteristics of primary and secondary ROS synthesis may be attributed to the effects produced by pancreatic enzymes entering blood flow which may alter functional activity of the blood neutrophils. Concerning hemostasis in patients with ADP, some disturbances were found only in the coagulation link which seem to depend on increase in fibrinogen, soluble fibrin monomer complexes and D-dimer in blood plasma, along with reduced antithrombin III levels. Such a change in blood coagulation indexes is typical to inflammatory processes and presumes activation of the coagulation cascade and higher risk of septic complications. In patients with ADP, we have found a significantly increased number of correlations between indicators of functional activity of neutrophils and hemostasis parameters. This analysis revealed a relationship by the patients with ADP reflect some unidirectional changes in functional activity of neutrophils (as phagocytosis and respiratory burst), and blood coagulation parameters (as blood clotting and vascular/ platelet links). The changes in functional activity of neutrophils and the state of hemostasis in the ADP patients, as well as correlations between their alterations are omvolved into the pathogenesis of this disorder, and determine potential mechanisms for evolving complications

Topological entropy for some isotropic cosmological models

The chaotical dynamics is studied in different Friedmann-Robertson- Walker cosmological models with scalar (inflaton) field and hydrodynamical matter. The topological entropy is calculated for some particular cases. Suggested scheme can be easily generalized for wide class of models. Different methods of calculation of topological entropy are compared.Comment: Final version to appear in Phys. Rev D. Minor changes, typos corrected; 29 pages with 2 eps figure