bluuebunny/crossref_metadata_2025_split huggingface dataset:
Removal of the Hypoglycaemic Drug Gliclazide From Aqueous Solutions by Carbon-Based Magnetic Materials
Authors: Çavuşoğlu Ferda Civan 
Published: August 2021

Abstract
Adsorption of gliclazide from aqueous solutions with carbon-based adsorbents is the aim of this study. For this purpose, magnetic, versatile, and inexpensive magnetic activated carbon (MAC) and magnetic multi-walled carbon nanotube (MMWCNT) adsorbents have been developed. MAC and MMWCNT characterization were analyzed using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Thermogravimetric analysis (TGA) techniques. In order to find the optimum conditions in batch adsorption experiments, the effects of parameters such as adsorbent dose, gliclazide solution pH, contact time, temperature and presence of foreign ions were investigated. Parameters were calculated for adsorption isotherms using Langmuir and Freundlich models. The adsorption studies of MAC and MMWCNT materials with gliclazide were in accordance with the nonlinear Langmuir and Freundlich isotherm models for all temperatures (298, 308, 318 K). The correlation coefficients of the Langmuir isotherm model are slightly higher than the Freundlich model. MAC adsorbent has maximum monolayer adsorption capacity at T=298 K (qmax=101.66 mg/g, R2=0.88) while MMWCNT has maximum monolayer adsorption capacity at T=308 K (qmax=71.59 mg/g, R2=0.90). For MAC and MMWCNT - Gliclazide adsorption systems, pseudo-first and secondorder kinetic models were examined and found to be more appropriate to the pseudo-secondorder kinetic model. The results showed that the MAC and MMWCNT could be could be promising adsorbents for gliclazide removal.
Wellbeing during the first wave of the COVID-19 pandemic among adults in Nigeria: Associations with psychosocial and pandemic-related factors
Authors: Ibigbami Olanrewaju Ibikunle , Oginni Olakunle Ayokunmi , Oloniniyi Ibidunni Olapeju , Ugo Victor , Ebuka Matthew , Adelola Aderopo , Esan Olufemi Abiodun , Amiola Ayomipo , Daropale Oluwatosin , Esan Oladoyin , Aloba Olutayo 
Published: August 2021

Abstract
Background: Psychosocial factors including stress are determinants of wellbeing. However, there is a shortage of information about how these relationships were impacted by the COVID-19 pandemic among adults in Nigeria.Objectives: To determine the associations between wellbeing, and impact of the COVID-19 pandemic, psychological distress (anxiety and depression), and perceived social support among adults in Nigeria during the first wave of the pandemic.Methods: Wellbeing (assessed using the WHO Wellbeing Index) was the outcome variable while the explanatory variables included anxiety and depressive symptoms (assessed using the Hospital Anxiety and Depression Scale), perceived social support (assessed using the Multidimensional Scale of Perceived Social Support) and perceived impact of the pandemic (assessed using perceived disruptions of life-domains). Univariate and multivariate logistic regression models were used to assess the associations between the outcome and explanatory variables. The models were adjusted for sociodemographic profile (highest level of education, employment status and payment status).Results: Low self-perceived impact of the pandemic was significantly associated with higher odds of high wellbeing (AOR: 2.59; 95% CI: 1.69-3.95; p<0.001). Other factors associated with significantly higher odds of high wellbeing were high perceived social support (AOR: 2.40; 95% CI:1.78-3.22; p<0.001) and having tertiary education (AOR: 1.51; 95% CI: 1.07-2.13; p=0.020). In contrast, experiencing anxiety symptoms were significantly associated with lower odds of high wellbeing (AOR: 0.24; 95% CI: 0.14-0.41; p<0.001)).Conclusions: Measures for enhancing the wellbeing of adults resident in Nigeria may include strategies to ameliorate the impact of the pandemic, strengthening social support systems, and promoting optimal physical and mental health.
A rapid real-time polymerase chain reaction-based live virus microneutralization assay for detection of neutralizing antibodies against SARS-CoV-2 in blood/serum
Authors: Abidi Syed Hani , Imtiaz Kehkeshan , Kanji Akbar , Qaiser Shama , Khan Erum , Iqbal Kiran , Veldhoen Marc , Ghias Kulsoom , Simas J. Pedro , Hasan Zahra 
Published: August 2021

Abstract

Background
Individuals recovering from COVID-19 are shown to have antibodies against the Spike and other structural proteins. Antibodies against Spike have been shown to display viral neutralization. However, not all antibodies against Spike have neutralizing ability and some may be cross-reactive. There is a need for easy-to-use SARS-CoV-2 neutralizing assays that allow the determination of virus neutralizing activity in sera of individuals. Here we describe a PCR-based micro-neutralization assay that can be used to evaluate the viral neutralization titers of serum from SARS-CoV-2 infected individuals.
Methods
The SARS-CoV-2 strain used was isolated from a nasopharyngeal specimen of a COVID-19 case. The limiting dilution method was used to obtain a 50% tissue culture infective dose (TCID50) of Vero cells. For the micro‐neutralization assay, 19 serum samples, with positive IgG titers against Spike receptor binding domain (RBD) were tested. After 24 hours, infected cells were inspected for the presence of the cytopathic effect, then lysed and RNA RT-PCR of SARS-CoV-2. The Ct values were used to calculate percent neutralization/inhibition of SARS-CoV-2.
Results
Out of 19 samples, 13 samples gave 100% neutralization at all dilutions, while 4 samples gave neutralization at lower dilution, while one sample did not give any neutralization. The correlation between RBD OD and neutralization potential was found to be statistically correlated.
Conclusion
We describe a rapid RT-PCR based SARS-CoV-2 microneutralization assay for detection of neutralizing antibodies. This can effectively be used to test anti-viral activity of serum antibodies for investigation of both disease-driven and vaccine-induced responses.
MOLECULAR IMAGING AND INTRAOPERATIVE RADIONAVIGATION IN PROSTATE CANCER
Authors: Rumyantsev P. O. , Bubnov A. A. , Sviridov P. V. , Nikiforovich P. A. , Trukhin A. A. , Korenev S. V. 
Published: August 2021

Introduction. Prostate cancer is one of the most common malignant neoplasms. Strategies to improve early diagnosis and subsequent therapy are being improved. An emphasis is placed on maintaining the quality of life and working capacity of patients after treatment. This can be achieved by improving methods of focal therapy, which depends on the accuracy of topical diagnosis and classification of the tumor. Hybrid molecular imaging (pet/ct and spect/ct) is used in addition to the methods of structural imaging (ultrasound, ct, mri). Intraoperative imaging using radionavigation systems is also used in open and endoscopic surgery for prostate cancer. Currently, it is a tool capable of reducing the invasiveness of surgery, localizing the area of metastatic lesions with a sensitivity and specificity of up to 95 %.Objective of the study: an overview of current and promising future methods of intraoperative radio navigation in the surgical treatment of prostate cancer.Material and methods. The review presents the methods of intraoperative radionavigation in the surgical treatment of prostate cancer. Radionavigation in the context of using tumarotropic radiopharmaceutical based on a prostate-specific membrane antigen, in which the drug accumulates in all tumor foci expressing this receptor, is also considered.Conclusion. The use of preoperative hybrid imaging and radio-guided surgery facilitate lesion identification and resection. Gamma probing allows detection of psma-positive tumor foci regardless of their depth. Fluorescence imaging methods (icg, photodynamic diagnostics, autofluorescence) are also used for intraoperative detection of pathological foci in real time. Multichannel gamma probing and cherenkov radiation detection, which combine the advantages of indirect and direct intraoperative imaging, have enormous potential.
LOCAL HYPERTHERMIA IN THE TREATMNET OF LOCALLY ADVANCED CERVICAL CANCER: CURRENT VIEW ON THE PROBLEM
Authors: Shpileva O. V. , Kolomiets L. A. , Startseva Zh. A. , Churuksaeva O. N. 
Published: August 2021

The purpose of the study was to review available data on the combined use of local hyperthermia and chemotherapy/radiotherapy in the treatment of locally advanced cervical cancer, as well as to analyze longterm treatment outcomes.Material and methods. A systemic literature review was conducted using medline, cochrane library, and elibrary databases in the interval time between 2003 and 2020.Results. The review describes the mechanisms of biological efficiency of local hyperthermia and evaluates the effect of hyperthermia combined with chemotherapy and radiation therapy on cancer cells. Analysis of the thermobiological effects of local hyperthermia indicates that it is a potent sensitizer of cell killing by ionizing radiation and chemotherapy. The increase in tumor radiosensitivity is caused by the inhibition of the repair processes of damaged dna strands. Hyperthermia enhances perfusion and oxygenation of hypoxic tumor cells with a consecutive increase in tumor radiosensitivity. During chemotherapy, local hyperthermia ensures the maximum targeted delivery of cytotoxic agents to the tumor, thus increasing the effectiveness of treatment. Moreover, local hyperthermia has a direct cytotoxic effect on tumor cells. Randomized trials on the use of hyperthermia in the treatment of locally advanced cervical cancer have shown positive immediate and long-term treatment outcomes.Conclusion. Local hyperthermia combined with chemotherapy and radiation therapy is a promising treatment modality for locally advanced cervical cancer, because it can significantly improve treatment outcomes and reduce the frequency of early and late adverse effects. However, despite the available world experience, there are no unified methodological approaches to local hyperthermia, and therefore further research is required.
THE RELATIONSHIP BETWEEN METABOLIC DISORDERS AND TUMOR PROGRESSION: REVIEW OF PRESENT DATA AND NEW THERAPEUTIC TARGETS
Authors: Semina E. V. , Danilova N. V. , Oleinikova N. A. , Agapov M. A. , Rubina K. A. 
Published: August 2021

Background. Type 2 diabetes mellitus, obstructive sleep apnea, osteoarthritis and certain types of cancer are known to correlate with obesity. The mechanisms underlying the link between metabolic disorders and cancer remain obscure, yet assuming a potentially important role of reduced insulin sensitivity, altered glucose metabolism in tumor cells (the so-called Warburg effect), changes in the spectrum of secreted adipokines or interaction with their cognitive receptors as well as changes in steroid sex hormone production.Material and methods. A search for articles published in peer-reviewed journals indexed in pubmed, Wos, scopus and Rsci was carried out. More than 150 articles devoted to the study of the relationship between metabolic disorders and tumor progression were analyzed, of which 69 were included in this review.Results. The main strategy of anticancer therapy is to suppress the proliferation of tumor cells and metastasis. However, one should take into consideration a significant role of additional factors that can enhance side effects of anticancer therapy, ensure the resistance of tumor cells to chemotherapy or change cancer cell metabolic profile. New data recently emerging in the literature indicate an important function of proteins such as t-cadherin and urokinase receptor (upar) and their possible involvement in the regulation of tumor cell metabolism, in particular, sensitivity to insulin and adipose tissue hormones. The review encompasses recent data on the involvement of t-cadherin and upar in the regulation of metabolism and proposes a model explaining the relationship between these proteins and metabolic disorders associated with the processes of carcinogenesis and chemoresistance of cancer cells.Conclusion. Understanding of the factors and mechanisms that support obesity and metabolic disorders is relevant both for the development of cancer preventive measures and optimization of therapeutic strategies for combating cancer.
ANTIMICROBIAL THERAPY DURING CANCER TREATMENT: A CASE REPORT
Authors: Grigoryevskaya Z. V. , Matveev V. B. , Sergeev D. A. , Tereshchenko I. V. , Vinnikova V. D. , Vershinskaya V. A. , Petukhova I. N. , Bagirova N. S. , Dmitrieva N. V. 
Published: August 2021

Introduction. Penile cancer (pc) is a rare cancer. The standardized incidence rate of pc in russia is 0.82 cases per 100,000 males. On average, 58 % of patients (20–96 %) with pc have a local infection process: tumor decay, the presence of erosion, tumor ulceration, inflammatory changes in regional lymph nodes, etc. During hospitalization nosocomial pathogens may be possible causes of infection in ulcerative lesions.The aim of the study was to present the results of the treatment of tumor ulcer in a patient with penile cancer infected with multiresistant acinetobacter baumannii and klebsiella pneumoniae.Material and methods. We present a clinical observation of 54-year-old patient diagnosed with penile cancer pt4n3m0, with ulceration of the tumor, localized at the root of the penis and ulceration of metastatic lymph nodes in the left inguinal region and subsequent infection with highly resistant nosocomial microorganisms.Results. The patient received 6 courses of paclitaxel, ifosfamide and cisplatin with clinical effect, such as significant reduction of the tumor and therapeutic pathomorphosis of 3-rd degree. Then ileo-inguinal lymphadenectomy was performed on the left. A few months later the tumor continued to grow in the left groin area. During the 2nd line of chemotherapy (cisplatin, docetaxel and capecitabine), the patient had grade iii–iv neutropenia, febrile neutropenia. High fever and localized infection in the area of tumor ulceration with multiresistant hospital microorganisms was detected. Combined antibiotic therapy had temporary effect. After isolation of multiresistant carbapenemresistant k. Pneumoniae from the ulcer, the patient was prescribed ceftazidim/avibactam 2.5 g 3 times a day. Clinical effect, such as defervescence and significant reduction of the ulceration zone was seen subsequently.Conclusion. Etiotropic antibacterial therapy of the infected tumor ulcer resulted in a significant reduction in the manifestation of the infection process, allowing antitumor therapy to be continued, as well as surgery to be performed.
COMBINED TREATMENT OF OPERABLE RECTAL CANCER WITH NEGATIVE PROGNOSIS FACTORS: A PROSPECTIVE STUDY
Authors: Kochkina S. O. , Gordeyev S. S. , Petrov K. S. , Mammedli Z. Z. 
Published: August 2021

Introduction. Neoadjuvant chemotherapy (nact) is a potential alternative to chemoradiation therapy (crt) for rectal cancer and may allow early prevention of distant metastasis.Objective: to study the safety and efficacy of nact for patients with rectal cancer without damage to the mesorectal fascia.Material and methods. From 2016 to 2019, patients with cancer of the upper ampullar (сmrt2-t4an+m0, cmrt4an0m0), medium ampullar (cmrt3сn0m0, cmrt2n+m0) rectal regions were included in the pilot prospective study. All patients underwent nact according to the capox 4 scheme. Evaluation of the effect was carried out on the basis of mri of the small pelvis. In the case of regression or stabilization, surgery was performed, and in the case of progression, crt was followed by surgery. After surgery, all patients were scheduled for adjuvant chemotherapy for a total duration of 6 months. The primary endpoint was the rate of pathological complete response (mandard trg 1). Secondary endpoints included disease progression, toxicity (nci-ctc v. 5.0), postoperative complications (clavien-dindo), chemotherapy regimen, and long-term treatment outcomes.Results. 136 patients were included into the study. Of 130 (11 %) patients, who underwent only nact prior to surgery, 15 had pathological complete response. 99 patients (72.8 %) received a full course of chemotherapy for 6 months (nact + adjuvant pct). 6 (4.3 %) patients after neoadjuvant chemotherapy were treated with crt, 5 (3.67 %) of them due to local progression according to mri data, 1 (0.7 %) due to grade 3 toxicity during 1 course of pct and inability to continue chemotherapy treatment plan. Radiation therapy resulted in partial tumor regression in all patients. Systemic progression was not observed in any patient. Grade iii–iv toxicity was observed in 7 (5.1 %) patients, including bronchospasm (n=2, 1.4 %), thrombocytopenia (n=1, 0.7 %), neutropenia (n=1, 0.7 %), peripheral neuropathy (n=1, 0.7 %), cardiotoxicity (n=1, 0.7 %), diarrhea (n=1, 0.7 %). Grade v toxicity (acute myocardial infarction) was observed in 1 (0.7 %) patient. R0 resection was performed in all cases. Grade iiia postoperative complications occurred in 6 (4.4 %) patients, iiib complications in 5 (3.7 %) patients, and death due to sepsis after postoperative pneumonia in 1 (0.7 %) patient. The frequency of anastomotic leak was 3.6 % (n=5). The median follow-up was 31.4 months, the overall survival (os) and disease-free survival (dfs) rates were 94 % and 92.8 %.Conclusion. Neoadjuvant chemotherapy is a promising treatment option for rectal cancer patients with negative prognostic factors.
CANCER MORTALITY IN RUSSIA FOR THE PERIOD OF 1965–2019: MAIN STRUCTURAL CHANGES AND TRENDS
Authors: Fattakhov T. A. , Mironova A. A. , Pyankova A. I. , Shahzadova A. O. 
Published: August 2021

Introduction. Noncommunicable diseases are the cause of the majority of deaths in the world. In the near future, neoplasms will be a leading cause of death and a challenge for an increasing life expectancy in most countries of the world. In this regard, we aimed to analyze the structural changes in cancer mortality in Russia in the period 1965–2019, comparing them with trends in other countries, and to assess the hypothetical gain in life expectancy due to complete eliminating cancer mortality.Material and methods. We used data on the age-specific mortality rates of the Russian Fertility and mortality database (rusfmd) of the centre of demographic Research of the New economic school (cdr Nes). We also used data from international databases: oecd Health statistics, global who mortality database, european Health for all database and international agency for Research on cancer. The analysis was carried out separately for males and females using decomposition and standardization methods.Conclusion. During the soviet era, there were no positive changes in the rate and structure of cancer mortality. A decrease in the age-standardized death rate (asdr) was achieved only in the post-soviet period. However, despite the currently comparable cancer mortality rates in Russia and the eu, Russia is characterized by: a lower total number of deaths; higher asdrs of pediatric cancers; lower average life expectancy; lower five-year survival rate of patients. An increase in the average age at death and five-year survival rate may have a positive effect on an increase in the healthy life expectancy of the Russian population, but may not significantly affect the decrease in the asdr for cancer. Therefore, these causes of death should not be considered as one of the main reserves for the growth of life expectancy (le), since even its complete elimination in the coming years can provide an increase in life expectancy by no more than 2 years.
EXPRESSION OF THE VASCULAR ENDOTHELIAL GROWTH FACTOR AND ITS RECEPTORS (VEGFR-1 AND VEGFR-2) IN PRIMARY TUMOR CELLS IN PATIENTS WITH RENAL CANCER
Authors: Khochenkov D. A. , Volkova M. I. , Timofeev I. V. , Olshanskaya A. S. , Khochenkova Yu. A. , Solomko E. Sh. , Ashuba S. A. , Matveev V. B. 
Published: August 2021

Purpose:to study the expression of vascular endothelial growth factor (vegf-a) and its receptors (vegfr-1 and vegfr-2) in renal cell carcinoma (rcc) cells and assess the effect of the expression levels of these markers on the tumor characteristics and prognosis of patients with rcc.Material and methods. The study included 65 patients with rcc (pt1a-t4n0/+m0/+). All patients underwent radical surgery. Histological tumor tissue samples obtained during surgery were used for the study. Expression of vegfa, vegfr-1, -2 was studied by immunohistochemical staining using appropriate antibodies to receptors and growth factors.Results.Expression of vegf and vegfr-1 and vegfr-2 receptors was ound in the cytoplasm and on the membrane of primary tumor cells of patients with rcc. There was a significant direct correlation of overexpression of the markers with g 3-4 anaplasia (vegfr-1, -2) and signs of significant tumor extension, including high pt category (vegfr-1, -2), larger size of the primary tumor (vegfr-1 , -2), tumor invasion of paranephria (vegf, vegfr-1), tumor venous thrombosis (vegfr-1, -2), multiple metastases (vegf-2), metastases in the adrenal gland (vegf, vegfr-2) and liver (vegfr-1) (p<0.05). There was a trend towards a significant effect of the level of vegf expression on the risk of progression of rcc after cytoreductive nephrectomy (p=0.0821). A tendency towards a significant effect of the level of vegfr-2 expression on the risk of death from rcc was revealed (p=0.089). No other relationships between the expression of vegf-a/vegfr-1, -2 and the prognosis of rcc were found (p>0.05).Conclusion. Expression of vegfa, as well as vegfr-1 and vegfr-2 receptors, was found on the surface and in the cytoplasm of cells of the primary tumor of patients with rcc (pt1a-t4n0/+m0/+). There was a significant correlation between vegf/vegfr overexpression with a high grade (g3-4) tumor anaplasia and significant tumor extension. In univariate analysis, a significant adverse effect on specific survival of vegfr-2 overexpression was observed. In regression analysis, vegfr-2 overexpression tended to independently affect specific survival. These results show the importance of vegf/vegfr expression as biomarkers in renal cell carcinoma.