Response of preantral follicles exposed to quinoxaline: A new compound with anticancer potential

Publication date: Available online 5 December 2019Source: Research in Veterinary ScienceAuthor(s): Denise Damasceno Guerreiro, Laritza Ferreira de Lima, Naíza Arcângela Ribeiro de Sá, Gildas Tetaping Mbemya, Anna Clara Accioly Ferreira, Benner Geraldo Alves, Sarah Sant'anna Maranhão, Cláudia Pessoa, Alessandra Campbell Pinheiro, Thais Cristina Mendonça Nogueira, Marcus Vinícius Nora de Souza, José Ricardo de Figueiredo, Ana Paula Ribeiro RodriguesAbstractThe culture of preantral follicles as an in vitro model to evaluate the toxicity of new anticancer drug has being established. Therefore, the aim of this study was to evaluate the effect of quinoxaline derivative the 2 2- (XYZC 6H 3 –CH=N-NH)-quinoxaline, 1 (QX) on caprine preantral follicles. We evaluate the follicular morphology and activation, proliferation and apoptosis of granulosa cells and finally the protein (ABCB1) and genes expression (cyclin/Cdks), respectively involved in multidrug resistance and cell cycle progression. Ovarian fragments containing primordial and developing follicles were exposed (in vitro culture) to different concentrations of QX (QX1.5, QX3.0 or QX6.0 μM/mL) during 6 days. To evaluate the effect of QX, the ovarian tissue was exposed to Paclitaxel 0.1 μg/mL (PTX – negative control) or in culture media without QX (MEM). At the end of exposure time, we realized that the QX (all concentrations) increased (P 
Source: Research in Veterinary Science - Category: Veterinary Research Source Type: research

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Publication date: Available online 23 January 2020Source: Pharmacological ResearchAuthor(s): Su-Wei Xu, Betty Yuen Kwan Law, Steven Li Qun Qu, Sami Hamdoun, Juan Chen, Wei Zhang, Jian-Ru Guo, An-Guo Wu, Simon Wing Fai Mok, David Wei Zhang, Chenglai Xia, Yoshikazu Sugimoto, Thomas Efferth, Liang Liu, Vincent Kam Wai WongAbstractMultidrug resistance (MDR) represents an obstacle in anti-cancer therapy. MDR is caused by multiple mechanisms, involving ATP-binding cassette (ABC) transporters such as P-glycoprotein (P-gp), which reduces intracellular drug levels to sub-therapeutic concentrations. Therefore, sensitizing agents ret...
Source: Pharmacological Research - Category: Drugs & Pharmacology Source Type: research
ConclusionsThis developed population pharmacokinetic model can be used to calculate cycloserine concentrations and exposure in patients with multidrug-/extensively drug-resistant tuberculosis. This model was successfully validated by internal and external validation methods. This study showed that the AUC0 –24 h of cycloserine can be estimated in patients with multidrug-/extensively drug-resistant tuberculosis using a 1- or 2-point limited sampling strategy in combination with the developed population pharmacokinetic model. This strategy can be used in studies to correlate drug exposure with clinical outcome. Th...
Source: Clinical Pharmacokinetics - Category: Drugs & Pharmacology Source Type: research
Gram-negative rod bacteremia (GNRB) is a leading cause of morbidity and mortality among allogeneic hematopoietic cell transplant (HCT) recipients. Historically, GNRB has been treated with inpatient intravenous antibiotic therapies. However, outpatient antibiotic delivery has been shown to lower costs, decrease complications and may reduce rates of hospital-acquired multidrug-resistant organism (MDRO) infections. Despite such advantages, there are no data assessing trends in outpatient management of GNRB among allogeneic HCT recipients nor on the impact changing resistance profiles have on such trends.
Source: Biology of Blood and Marrow Transplantation - Category: Hematology Authors: Tags: 492 Source Type: research
CONCLUSIONS Our findings suggest that Trop2 promotes the resistance of gastric cancer to chemotherapy by activating the Notch1 pathway. PMID: 31964857 [PubMed - in process]
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
Publication date: Available online 22 January 2020Source: PeptidesAuthor(s): Anshul Panjeta, Simran PreetAbstractThe escalating predicament of multidrug resistant cancer cells and associated side effects of conventional chemotherapy necessitates the exploration of alternative anticancer therapies. The present study evaluated anticancer therapeutic potential of human defensin 5 (HD-5) against colon cancer. The in vivo anticancer efficacy of HD-5 against 1,2-dimethylhydrazine (DMH) induced colon cancer was elucidated in terms of tumor biostatistics, number of aberrant crypt foci (ACF), in situ apoptosis assay,changes in morp...
Source: Peptides - Category: Biochemistry Source Type: research
Wastewater treatment plants (WWTPs) are considered hotspots for the environmental dissemination of antimicrobial resistance (AMR) determinants. Vancomycin-Resistant Enterococcus (VRE) are candidates for gauging t...
Source: BMC Microbiology - Category: Microbiology Authors: Tags: Research article Source Type: research
Publication date: Available online 20 December 2019Source: Journal of Hospital InfectionAuthor(s): B. Pilmis, T. Billard-Pomares, M. Martin, C. Clarempuy, C. Lemezo, C. Saint-Marc, N. Bourlon, D. Seytre, E. Carbonnelle, J-R. ZaharSUMMARYBackgroundLittle is known about patient risk factors associated with environmental contamination.AimTo evaluate the rate of environmental contamination and to investigate individual risk factors.MethodsA prospective cohort study was conducted. Each day, five rooms occupied by patients were selected. Five critical surfaces were systematically swabbed twice a day before and after cleaning. Cl...
Source: Journal of Hospital Infection - Category: Infectious Diseases Source Type: research
AbstractPurpose of reviewNeutropenia and its related infections are still a significant challenge in the treatment of patients with onco-hematological diseases, impacting increased mortality and morbidity. In this review, we compiled up-to-date scientific evidence on infection control in neutropenic patients and discussed the potential role of new technologiesRecent findingsTraditional measures such as hand hygiene (HH), patient ’s skincare, central venous catheter care, environment protection, and contact isolation are the cornerstone of infection prevention in neutropenic patients while antibiotic prophylaxis is st...
Source: Current Treatment Options in Infectious Diseases - Category: Infectious Diseases Source Type: research
AbstractPurpose of ReviewEarly diagnosis of infections and immediate initiation of appropriate antimicrobials are crucial in the management of patients before and after organ transplantation. We reviewed the most recent literature and guidelines in this field and organized the current recommendations for healthcare professionals caring for critically ill organ transplant recipients.Recent FindingsThe incidence of multidrug-resistant organisms is increasing. Multidrug-resistant Gram-negative bacteria comprise about 14% of organisms. Vancomycin-resistant enterococci bloodstream infections are also on the rise, as 20.5% of no...
Source: Current Transplantation Reports - Category: Transplant Surgery Source Type: research
ConclusionsC/T may represent a useful option against MDR- and XDR-PA strains responsible of complicated SSTIs in patients affected by impaired renal function.
Source: Infection - Category: Infectious Diseases Source Type: research
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