Breaking News
January 22, 2018 - Specially prepared supplement helps women to run faster, study shows
January 22, 2018 - 3-D Stent Retriever with Aspiration Proves Mettle in AIS
January 22, 2018 - Public health research seeks to understand how natural disasters impact spread of Zika
January 22, 2018 - Research reveals role of nanophenomenon in stimulating bone-repair process
January 22, 2018 - Epilepsy associated with volume and thickness differences in brain matter
January 22, 2018 - Trevena Announces FDA Acceptance for Review of New Drug Application for Olinvo (oliceridine) Injection
January 22, 2018 - A Noteworthy Margin of Error
January 22, 2018 - Firm advances human trials of revolutionary vaccine
January 22, 2018 - Many Indians put away treating orthopedic problems
January 22, 2018 - Cherwell releases new pocket guide to prepared culture media
January 22, 2018 - Huron earns ISO 13485 certification for quality management system
January 22, 2018 - Avion Pharmaceuticals Announces FDA Approval of Balcoltra (levonorgestrel and ethinyl estradiol tablets and ferrous bisglycinate tablets) Oral Contraceptive
January 22, 2018 - Multi-Gene Test For Early CVD; Neighborhood HF Risk; Novel Testosterone Drugs
January 22, 2018 - Skipping breakfast disrupts ‘clock genes’ that regulate body weight
January 22, 2018 - Creativity May Rely on ‘Teamwork’ in the Brain
January 22, 2018 - NeuroBreak: Alzheimer’s Germ Contest; High Salt Diet May Be Bad for Brain
January 22, 2018 - Diabetics may often fare poorly in hospice care
January 22, 2018 - Performance enhancing benefits of caffeine more apparent for infrequent tea, coffee drinkers
January 22, 2018 - HHS Unveils Framework for Interoperability
January 22, 2018 - More dentists to discuss risks of HPV-related cancers with their patients
January 21, 2018 - Research shows how Zika virus damages placenta to cause malformations in babies
January 21, 2018 - Achaogen Announces FDA Acceptance of New Drug Application with Priority Review for Plazomicin for Treatment of Complicated Urinary Tract Infections and Bloodstream Infections
January 21, 2018 - Drug Allergies: Time to Re-Test?
January 21, 2018 - Mitochondrial protein in cardiac muscle cells linked to heart failure, study finds
January 21, 2018 - Women more likely than men to die from a heart attack
January 21, 2018 - Next generation genomic sequencing can help detect pathogens after joint replacement
January 21, 2018 - Gov’t Shutdown Looms as Senate Debates Spending Bill
January 21, 2018 - Emergency Readiness for Older Adults and People with Disabilities
January 21, 2018 - Heart health at risk for Latinas over worries about deportation
January 21, 2018 - Scientists methodically identify genes related to blood feeding and non-biting mosquitoes
January 21, 2018 - Researchers discover potential target genes to halt thyroid cancer progression
January 21, 2018 - Youth with shared residency after parents’ divorce have less mental issues
January 21, 2018 - Sleep Better, Lose Weight? – Drugs.com MedNews
January 21, 2018 - More $$ Needed for Health Emergencies, Senators Told
January 21, 2018 - Gene test to predict breast cancer recurrence less cost effective in real world practice
January 21, 2018 - Study finds rise in number of adolescents receiving psychiatric or neurodevelopmental diagnosis
January 21, 2018 - Reminders can improve immunization rates
January 21, 2018 - A More Personalized Approach to PSA Screening in 2017
January 21, 2018 - T-cells engineered to outsmart tumors induce clinical responses in relapsed Hodgkin lymphoma
January 21, 2018 - Tetraphase Pharmaceuticals Announces Submission of New Drug Application to FDA for Eravacycline for the Treatment of Complicated Intra-Abdominal Infections (cIAI)
January 21, 2018 - Have Robotics Had a Detrimental Effect on Surgical Residency?
January 21, 2018 - Being bilingual may help autistic children
January 21, 2018 - Metrics Are Not Widespread in Rheumatoid Care
January 21, 2018 - Neuroanatomic abnormalities ID’d in those at risk for autism
January 21, 2018 - Children born with Down’s syndrome have superior genome that compensates for disability
January 21, 2018 - Study finds higher risks for asymptomatic paroxysmal AF patients
January 21, 2018 - The Second Stage of Diet Resolutions
January 21, 2018 - CT Scans Reduce Lung Cancer Deaths … But Among Whom?
January 21, 2018 - ADHD drug use soars among young women
January 21, 2018 - Researchers propose new regulation mechanism linked to action of SirT6 on chromatin
January 21, 2018 - Statins appear to reduce risk of repeated surgery in patients who undergo vitrectomy
January 21, 2018 - Morning Break: Hep A Outbreak Spreads; Tide Pod Challenge; Keeping Lobsters Out of Hot Water
January 21, 2018 - EULAR and ACR present SLE classification criteria at the 2017 ACR/ARHP Annual Meeting
January 21, 2018 - Progenics Pharmaceuticals Announces FDA Acceptance of New Drug Application for Azedra (iobenguane I 131) in Pheochromocytoma and Paraganglioma
January 21, 2018 - House Passes Funding Bill with 6-Year CHIP Renewal
January 21, 2018 - DASH ranked Best Diet Overall for eighth year in a row by U.S. News and World Report
January 21, 2018 - Dementia study sheds light on how damage spreads through brain
January 20, 2018 - Morning Break: Missing Maria Deaths; N.J. Doc Charged in Wife’s Murder; Viva Vaseline!
January 20, 2018 - No interventions proven to prevent late-life dementia
January 20, 2018 - Judge orders new Olympus trial over superbug death
January 20, 2018 - Don’t Rely on Just One Blood Pressure Test for Kids: Study
January 20, 2018 - Going Off the Deep End About Water
January 20, 2018 - Parental attention can reduce risk of drug abuse in adolescence
January 20, 2018 - Mast Uri System offers efficient and cost-friendly diagnostic solution
January 20, 2018 - International SOS, Chatham House sign partnership agreement to further advance Global Health Security Agenda
January 20, 2018 - Study offers way to predict onset of lung disease in children with cystic fibrosis
January 20, 2018 - C-Suite Must Lead in Ending Sexual Harassment
January 20, 2018 - Researchers find a way to ‘starve’ cancer
January 20, 2018 - Applied math can help predict genesis and evolution of different cancers
January 20, 2018 - UCLA researchers describe herpes virus structure associated with Kaposi’s sarcoma
January 20, 2018 - New study enrolls first patient to evaluate potential of WaveCrest LAAO System
January 20, 2018 - New review explores effects of exposing developing brains to general anesthesia
January 20, 2018 - GW Pharmaceuticals Announces Acceptance of NDA Filing for Epidiolex (cannabidiol) in the treatment of Lennox-Gastaut syndrome and Dravet syndrome
January 20, 2018 - Weight-Loss Surgery Approaches Offer Similar Results
January 20, 2018 - Free online access to millions of documents on chemical toxicity
January 20, 2018 - CE marked MAST Toxoreagent kit for detection of Toxoplasma antibodies
January 20, 2018 - DNA study sheds light on longstanding puzzle of cell division
January 20, 2018 - Montefiore provides specialized medical care to parents of adopted children
January 20, 2018 - Enzyme discovery provides new horizon of therapeutic opportunities across disease spectrum
January 20, 2018 - New smartphone app successfully enables remote monitoring of surgical wounds
Researchers discover new way to attack drug-resistant prostate cancer cells

Researchers discover new way to attack drug-resistant prostate cancer cells

image_pdfDownload PDFimage_print

In most cases, prostate cancer is cured by surgical removal of the tumor and/or by radiotherapy. However, 20% of patients will need treatment to remove tumor cells but this treatment ceases to be effective after two or three years and the cancer develops further. Once this stage of the disease has been reached, there is no cure. A team headed by Xavier Salvatella, ICREA researcher at the Institute for Research in Biomedicine (IRB Barcelona), has discovered a new avenue through which to attack prostate cancer cells that have developed drug-resistance. Published in the journal Structure, part of the Cell group, the study opens up new therapeutic avenues against a disease that causes 75,000 deaths a year in Europe alone (source: European Science Hub, 2015).

A clear target and new sites of attack

The survival and proliferation of prostate tumor cells calls for highly active androgen receptor protein. The drug used to remove tumor cells interferes with this protein by binding to a specific region of the receptor and blocking its activity. “Over time, the protein accumulates alterations and mutates, and there comes a point where it is futile to target this region with drugs because, in fact, it is no longer there,” says Salvatella.

The Molecular Biophysics Laboratory, headed by Salvatella, studies the tridimensional structure and atomic movements of the androgen receptor, with the aim to find new binding sites. It has been known for some years that the protein has a small region, spanning only 20 amino acids, that is important for tumor cell survival. The study now describes for the first time that this region–usually without a structure and therefore a priori disregarded as a drug target–has a helix shape. Upon gaining this helix–it is not known how the helix occurs–, another protein, called TFIIF, binds to it. The study reveals that this interaction stimulates the activity of the androgen receptor and, consequently, facilitates the survival and multiplication of tumor cells.

To this 20-residue motif in the androgen receptor the IRB Barcelona teams now adds the protein TFIIF as a potential therapeutic target for prostate cancer. “The fact that TFIIF is a folded protein with a more defined structure makes it easier to search for drugs that can interfere with its interaction with the motif. For prostate tumor cells that have become resistant to treatment, we believe that this interaction could be their last mechanism through which to survive and proliferate,” explains Salvatella.

“Using cells in vitro, we have seen that if we remove this region, the TFIIF protein can’t bind to the androgen receptor. So if the interaction does not occur, the androgen receptor loses activity, which is what we are interested in achieving,” says Elzbieta Maria Szulc, “la Caixa” PhD student at IRB Barcelona and co-first author of the study with Eva de Mol, a former “la Caixa” PhD student in the same lab who started this line of research.

In collaboration with experts in computational modeling, the scientists are searching for drugs that interfere with TFIIF. “We don’t know whether such drugs will have a positive effect on cells, but the data available is promising,” says Salvatella.

Source:

https://www.irbbarcelona.org/en/news/closing-in-on-advanced-prostate-cancer

Tagged with:

About author

Related Articles