Diagnostic and prognostic significance of some inflammatory serum proteins in patients with precancerous diseases and cervical cancer

Background: The high social significance of cervical cancer, the shortcomings of the performed cervical screening is prerequisites for research in the field of mproving the diagnosis of this disease. We hypothesized that the systemic level of some inflammatory proteins could be used as a diagnostic criterion for cervical cancer.The aim of the study was to study the level of some vascular-inflammatory markers in the blood serum in patients with precancerous diseases and cervical cancer in order to improve their diagnosis and also to identify markers for predicting an unfavorable outcome in patients with cervical cancer.Materials and methods. A non-randomized prospective controlled study was carried out, the participants of which were patients with the diagnosis of cervical cancer (n = 49) and cervical intraepithelial neoplasia of the III degree (n = 13). The control group included 15 relatively healthy women. The following spectrum of inflammatory proteins was determined in blood serum by flow cytometry using the Human Vascular Inflammation Panel 1: myoglobin, calprotectin, lipocalin A, matrix metal peroxidase 2, osteopontin, myeloperoxidase, serum amyloid A, protein 4, which binds insulin-like growth factor cell-cell adhesion 1, vascular cell adhesion molecule, matrix metalloperoxidase 9, cystatin C. Statistical analysis was carried out by calculating the Mann-Whitney test with Bonferroni’s correction. The model was created using binary logistic regression to diagnose cervical cancer.Results. In the intergroup comparison of the protein`s spectrum in the blood serum, no significant differences were obtained. However, using the binary logistic regression method, an equation was drawn up to calculate the diagnostic coefficient of cervical cancer, which allows diagnosing cervical cancer with an accuracy of 82%, and in terms of information content is not inferior to cytological diagnostics. The developed coefficient can be used to predict an unfavorable outcome of cervical cancer after 1 year from the moment of diagnosis. Conclusion. The developed diagnostic coefficient makes it possible to  diagnose cervical cancer with high accuracy and can be used to predict cervical cancer

Transformation of residual oil in producing formations of the Romashkino oil field during hydrothermal treatment

Changes in the composition of organic matter of rocks and residual oil from multiage deposits of the Romashkino oil field in a reducing environment in a continuous-flow aqueous system were studied. It was shown that, as a result of the action of hydrothermal factors, the amount of hydrocarbon fractions increases and the amounts of alcohol-benzene-extractable resins, asphaltenes, and total sulfur decrease in organic extracts obtained from the rocks after hydrothermal experiments. The concentration of free radicals, as well as tetravalent vanadium (which is present in the form of vanadyl prophyrin complexes) and other heavy metals, in asphaltenes decreases. The hydrothermal treatment of petroliferous rock leads to the degradation of the structure of insoluble kerogen and unrecoverable components of residual oil, as well as to the washout of free hydrocarbons from the rock with the aqueous phase, n-Alkanes; ethyl, butyl, and octyl phthalates; furan; acids; and unsaturated oxygen-containing compounds with the isoprenoid structure were detected in the products of hydrothermal experiments isolated from aqueous extracts. © 2007 Pleiades Publishing, Ltd

Changes in hydrocarbon content of heavy oil during hydrothermal process with nickel, cobalt, and iron carboxylates

© 2018 We conducted autoclave modeling experiments to study the process of upgrading heavy oil in the reservoir conditions and used carboxylates of transition metals (Ni, Co, Fe) as catalyst precursors. The process was carried out at temperatures of 250, 300, and 350 °C in the presence of a naphthenoaromatic hydrogen donor. We found that significant content changes of oil occur at temperatures of 300 and 350 °C accompanied by an increase of light fractions and a decrease of high molecular weight hydrocarbons. We studied the hydrocarbon composition of the initial oil and the products of the hydrothermal process as well as tetralin (proton donor) transformations to determine the patterns of influence of the process conditions and catalyst precursors

Transformations of hydrocarbons of Ashal’hinskoe heavy oil under catalytic aquathermolysis conditions

© 2017, Pleiades Publishing, Ltd. The influence of temperatures of 250, 300, and 350°C on the character of changes in the group and hydrocarbon compositions of heavy oil from the Ashal’chinskoe field in laboratory experiments on the simulation of oil aquathermolysis processes under reservoir conditions has been revealed. The experiments have been carried out in the presence of kaolin as a rock-forming mineral, using oil-soluble iron carboxylate and tetralin as a proton donor. It has been shown that temperature elevation to 300 and 350°C increases the amount of saturated fractions by factors of 1.5 and 1.75, respectively, and decreases the resin content almost by half in comparison with the initial oil. The proportion of n-alkanes and light alkylcyclohexane and trimethylalkylbenzene homologues in the saturated fractions increases as a result of cracking reactions involving the preferential degradation of high-molecular-weight resins. A noticeable increase in the amount of newly formed hydrocarbons and asphaltenes at the temperature of 350°C indicates that not only intensive cracking processes, but also condensation processes occur under these conditions. Changes in the quantitative and qualitative composition of the proton donor tetralin by its dehydrogenation to form naphthalene and hydrogenation to yield the cis- and trans-isomers of decalin have been revealed

The composition of rocks and residual hydrocarbons in the flooded-out zones of romashkinskoye field reservoirs

Features of the change of the hydrocarbon composition of residual oil in the flooded-out zones of Pashlyskly Horizon reservoirs under long-term development are determined. Microstructural changes in rocks - reservoirs, caused by the degradation and regeneration processes, are revealed. It is shown, that asphaltenes and alcohol benzene resins dominated in the residual oil in strongly flooded-out sandy areas of terrigenous strata

Change in the Hydrocarbon and Component Compositions of Heavy Crude Ashalchinsk Oil Upon Catalytic Aquathermolysis

© 2017, Springer Science+Business Media, LLC. A physical model has been developed for the aquathermolysis of heavy crude oil from the Ashalchinsk oil field at 250°, 300°, and 350°C. Nickel and cobalt carboxylates were used as oil-soluble catalyst precursors. In the presence of a hydrogen proton donor at 300°C, the oil content was found to rise considerably and the resin content was found to decrease by a factor of 1.8, which leads to a decrease in crude oil viscosity by 91% and a decrease in density from 960 to 933 kg/m 3 . The hydrocarbon composition of the liquid aquathermolysis products was studied by chromate-mass spectrometry. The average molecular weight of the asphaltenes was determined by matrix-assisted laser desorption/ionization (MALDI) spectrometry. The maximum disproportionation of the hydrocarbons into n-alkanes, alkylcyclohexanes, and alkylbenzenes occurs at 300° and 350°C. The composition of the hydrogen proton donor (tetralin) conversion products at these aquathermolysis temperatures was determined

The recurrences of cervical cancer: Possibilities of molecular prediction

The incidence of recurrence of cervical cancer ranges from 10 to 40 %. The 5-year survival rate for patients with recurrent cervical cancer is about 5–15 % against the background of current drug therapy. Clinical and morphological characteristics of the tumor process are known, which are used as markers of an unfavorable prognosis for the development of cervical cancer recurrence. The search for molecular prognostic markers of the course of cervical cancer continues.The aim. To determine the level of immune cycle proteins in patients with cervical cancer 0–IV stages, depending on the occurrence of a relapse of the disease.Materials and research methods. A retrospective analysis of previously obtained results of a study on the local level of immune cycle proteins in patients with cervical cancer was performed. Three years after follow-up, 2 groups were formed: group 1 – patients treated for cervical cancer without signs of disease progression (n = 83); group 2 – patients with cervical cancer with local or systemic recurrence (n = 18). Used statistical methods: non-parametric methods of statistics using the Kruskal – Wallis test; ROC-analysis for significant values in order to calculate threshold values; determination of the quality of the identified predictive markers by calculating the sensitivity, specificity, accuracy.Results. Local initial threshold values have a predictive value for predicting the occurrence of cervical cancer recurrence: B7.2 < 10.7 pg/ml (Se = 0.87; Sp = 0.73; Ac = 0.76; AUC = 0.78), PD-L1 ≤ 5.1 pg/ml (Se = 0.87; Sp = 0.68; Ac = 0.71; AUC = 0.76), sCD27 ≥ 32.0 pg/ml (Se = 0.75; Sp = 0.78; Ac = 0.78; AUC = 0.75).Conclusion. Determination of local levels of B7.2, PD-L1, sCD27 in patients with cervical cancer before treatment can be used to predict the development of disease recurrence during 3 years of follow-up

Features of the interrelationships of some molecular parameters of cervical epithelium cells with biological characteristics of tumor cells in the process of cervical carcinogenesis

Background. Despite the known trigger and identified risk factors, the screening program developed, many aspects of the pathogenesis of cervical cancer are still being studied. In particular, recently in the literature there are data on the participation of short-chain fatty acids in the tumor process. The aim of the study was to perform a correlation analysis of the level of TNF-A., its soluble sTNF-RI receptor, the spectrum of SCFA and some biological parameters (apoptosis, necrosis, proliferation, cell cycle) in the exocervical cells during dys- and neoplastic transformation. Materials and methods: the laboratory data obtained by us earlier were used to perform the Spearman correlation analysis. The groups of research: IA - the focus of the pre-tumor lesion of exocervix; IB - paradysplastic cells; IIA - locus of cervical cancer; IIB - paraneoplastic cells. Results. The correlation relationships between the parameters studied were multidirectional, determined by the state of the cell (healthy, dysplastic, malignant) and varied within one study, depending on the location in relation to the pathological focus. Conclusions. The revealed interrelations are important for expanding the already available information on cervical carcinogenesis, for discovery of new diagnostic methods and treatment of cervical neoplasia. Summarizing, it is possible to judge the presence of pathogenetic relationships between the processes of cervical carcinogenesis (proliferation, apoptosis, necrosis, modulation of the phases of the cell cycle), the level of short-chain fatty acids and cytokine production at the local level

Study of the rheological properties of heat-treatment products of asphaltic oils in the presence of rock-forming minerals

© 2015 Springer Science+Business Media New York. The heat-treatment mechanisms of superviscous oil in the presence of naturally occurring catalysts (carbonate rock, alumina, etc.) and carboxylic acid at 290-360°C and 1-1.4 MPa pressure are studied. Analysis of the component composition of the transformed oil indicates the predominance of polycondensation reactions over cracking reactions. Based on IR spectroscopic data, the products are characterized, vis-à-vis the original oil, by reduced content of branched structures and sulfoxide groups. The transformed oil samples differ in the temperature at which the viscosity anomaly index more than doubles. The viscosity of the conversion product can be higher or lower than that of the original oil, depending on the process temperature and the type of the mineral catalytic additive

Genesis of biomarker hydrocarbons in the environment and their role in assessing an oil pollution source

Oil spills are classified according to chemical types that reflect qualitative and quantitative changes in petroleum composition during biodegradation in soil. Possible trends in composition of biomarker petroleum hydrocarbons in polluted soil, as determined by natural and climatic conditions and by activation of soil microflora, were revealed. It was shown that the use of selective bioremediation methods could lead to a noticeable redistribution of the relative amount of C27 : C28 : C29 steranes in marine crude oils owing to more intense degradation of C 27 steranes (5α, 14β, 17β, 20R and 20S, as well as 5α, 14α, 17α, 20R and 20S) as compared with their higher C29 homologues. The observed changes in the composition of steranes suggest another, namely, terrigenous origin of petroleum, and, thus, may lead to an erroneous conclusion concerning the genotype of crude oil as a pollution source. It was found that hopane hydrocarbons are highly stable under similar conditions. It was shown that the set of biomarker hydrocarbons might be useful as biological indicators in the assessment of a petroleum pollution source. © MAIK "Nauka/Interperiodica"