Tannic acid elicits selective antitumoral activity in vitro and inhibits cancer cell growth in a preclinical model of glioblastoma multiforme

AbstractGlioblastoma is a devastating tumor affecting the central nervous system with infiltrative capacity, high proliferation rate and chemoresistance. Therefore, it is urgent to find new therapeutic alternatives that improve this prognosis. Herein, we focused on tannic acid (TA) a polyphenol with antioxidant and antiproliferative activities. In this work, the antitumor and antioxidant effects of TA on rat (C6) glioblastoma cells and their cytotoxicity relative to primary astrocyte cultures were evaluated in vitro. Cells were exposed to TA of 6.25 to 75  μM for 24, 48 and/or 72 h. In addition, colony formation, migration and cell adhesion were analyzed and flow cytometry was used to analyze cell death and cell cycle. Next, the action of TA was evaluated in a preclinical glioblastoma model performed on Wistar rats. In this protocol, the animals w ere treated with a dose of 50 mg/kg/day TA for 15 days. Our results demonstrated that TA induced in vitro selective antiglioma activity, not demonstrating cytotoxicity in astrocyte culture. It induced cell death by apoptosis and cell cycle arrest, reducing formation and size of colonies, cell migr ation/adhesion and showing to be a potential antioxidant. Interestingly, the antiglioma effect was also observed in vivo, as TA decreased tumor volume by 55%, accompanied by an increase in the area of intratumoral necrosis and infiltration of lymphocytes without causing systemic damage. To the best of our knowledge, ...
Source: Metabolic Brain Disease - Category: Neurology Source Type: research

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Publication date: March 2020Source: Advances in Medical Sciences, Volume 65, Issue 1Author(s): Javad Masoumi, Abdollah Jafarzadeh, Hossein Khorramdelazad, Morteza Abbasloui, Jalal Abdolalizadeh, Najmeh JamaliAbstractApelin is an endogenous peptide, which is expressed in a vast board of organs such as the brain, placenta, heart, lungs, kidneys, pancreas, testis, prostate and adipose tissues. The apelin receptor, called angiotensin-like-receptor 1 (APJ), is also expressed in the brain, spleen, placenta, heart, liver, intestine, prostate, thymus, testis, ovary, lungs, kidneys, stomach, and adipose tissue. The apelin/APJ axis ...
Source: Advances in Medical Sciences - Category: Biomedical Science Source Type: research
CONCLUSIONS The current study indicated that patients with lung cancer after CTx had decreased dynamic brain activity in the DMN region, and the DMN is vulnerable when patients undergoing CTx. PMID: 32069270 [PubMed - in process]
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
A brain cell image has won the Institute of Cancer Research Science and Medical Imaging Competition, with images of melanoma cells and cancer-halting microparticles among other notable entries
Source: New Scientist - Health - Category: Consumer Health News Source Type: research
AbstractBackgroundPrevious studies have identified that patients withEGFR mutations tend to have better responses to targeted therapy, as well as chemotherapy; however, the effect of genetic alterations in terms of radiotherapy (RT) ‐related outcomes has not been fully assessed. We studied the impact of common non‐small cell lung cancer (NSCLC) genetic alterations (EGFR,ALK andKRAS) in relation to objective response rate (ORR) to RT in patients with brain metastases.MethodsFrom 2009 –2015, 153 patients with an available genotyping status were treated with whole‐brain irradiation (WBI) before receiving systemic ...
Source: Thoracic Cancer - Category: Cancer & Oncology Authors: Tags: ORIGINAL ARTICLE Source Type: research
(University of Southern California) Researchers at the USC Viterbi School of Engineering have designed a new drug cocktail that kills some types of brain and soft tissue cancers by tricking the cancer cells to behave as if they were starving for their favorite food -- glucose. The researchers' findings were recently published in the Journal of Biological Chemistry and may pave the way for targeted cancer treatments with greater efficacy and less harmful side effects.
Source: EurekAlert! - Medicine and Health - Category: International Medicine & Public Health Source Type: news
(Case Western Reserve University) Researchers at Case Western Reserve University School of Medicine and Cleveland Clinic new discovered a more accurate way to determine the relative life expectancy of glioblastoma victims and identify who could be candidates for experimental clinical drug trials by blending information from Artificial Intelligence (AI)--in this case, computer image analysis of the initial MRI scans taken of brain cancer patients--and genomic research.
Source: EurekAlert! - Biology - Category: Biology Source Type: news
In this study we have performed chronoamperometry on single stranded and double stranded DNA/6-mercapto-1-hexanol (MCH) mixed SAMs on gold electrodes in the presence of hexaammine ruthenium(III) (RuHex) to monitor the DNA modification with cis-diamminedichloroplatinum(II) (cisplatin). Our EQCM studies confirmed that the redox response of electrostatically bound RuHex is capable of providing quantitative information regarding the extent of DNA cross-linking with cisplatin. We believe that this method can be used in studies to test the interactions of cancer chemotherapeutic medications like cisplatin with ss &dsDNA and ...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Often we don’t really consider gender dynamics in treatment or medication. A lot of medications are only tested on men because of the risk of pregnancy, etc. This means there are whole drugs that have made it to market that may not have ever been tested with women. Schizophrenia affects women in many different ways than men. In this episode schizophrenic Rachel Star Withers and cohost Gabe Howard discuss differences in age, symptoms, treatments, lifestyle, parenthood in the genders as they experience schizophrenia. Dr. Hayden Finch joins to explain the medical side.  Highlights in “Schizophrenia in Women...
Source: World of Psychology - Category: Psychiatry & Psychology Authors: Tags: Inside Schizophrenia Mental Health and Wellness Women's Issues Gender Differences Mental Disorder Mental Illness Psychiatry Psychology Psychotherapy Women's Health women's mental health Source Type: blogs
Understanding the sequence of events leading to cancer relies in large part upon identifying the tumour cell of origin. Glioblastoma is the most malignant brain cancer but the early stages of disease progression remain elusive. Neural lineages have been implicated as cells of origin, as have glia. Interestingly, high levels of the neural stem cell regulator TLX correlate with poor patient prognosis. Here we show that high levels of theDrosophila TLX homologue, Tailless, initiate tumourigenesis by reverting intermediate neural progenitors to a stem cell state. Strikingly, we could block tumour formation completely by re-exp...
Source: eLife - Category: Biomedical Science Tags: Developmental Biology Stem Cells and Regenerative Medicine Source Type: research
AbstractPulmonary hypertension (PH) has been described in myelofibrosis (MF), but it is rare and typically found in advanced disease. Although the etiology of PH in MF is unclear, early predictors may be detected by echocardiogram. The goals of our study were to evaluate the prevalence of PH as determined by echocardiography in a cohort of MF patients and to identify clinical risk factors for PH. We performed a retrospective review of MF patients from October 2015 to May 2017 at MD Anderson Cancer Center in the ambulatory clinic, and those with echocardiogram were included. Clinical, echocardiographic, and laboratory data ...
Source: Annals of Hematology - Category: Hematology Source Type: research
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