Breaking News
July 16, 2018 - Quark Pharmaceuticals, Inc Announces First Patient Dosed in Phase 3 Clinical Trial of QPI-1002 for Prevention of Acute Kidney Injury Following Cardiac Surgery
July 16, 2018 - NSAIDs shown to have causal role in cardiovascular risk of patients with osteoarthritis
July 16, 2018 - PET scan tracer predicts success of cancer ‘vaccine’ | News Center
July 16, 2018 - Parents struggle with what to do when their child has headache, shows study
July 16, 2018 - Outrageous or overblown? HHS announces another round of ACA navigator funding cuts
July 16, 2018 - Weight loss surgery may impact individual’s risk of developing cancer, shows study
July 16, 2018 - Alexion Submits Application for Priority Review and Approval of ALXN1210 as a Treatment for Patients with Paroxysmal Nocturnal Hemoglobinuria (PNH) in the U.S.
July 16, 2018 - Restoring epigenetic balance reinstates memory in flies with Alzheimer’s disease symptoms
July 16, 2018 - Magnetized wire could be used to detect cancer in people | News Center
July 16, 2018 - Non-surgical management found to be feasible option for penetrating kidney trauma
July 16, 2018 - California clinic screens asylum seekers for honesty
July 16, 2018 - FDA Approves Xtandi (enzalutamide) for the Treatment of Men with Non-Metastatic Castration-Resistant Prostate Cancer (CRPC)
July 16, 2018 - Can nanotechnology help treat Alzheimer’s?
July 16, 2018 - Researchers identify protein essential for making stem cells | News Center
July 16, 2018 - Radiologist discusses causes, treatments of varicose veins
July 16, 2018 - Researchers develop nanostructured surface to accelerate wound healing after dental implants
July 16, 2018 - New non-invasive procedure to reposition kidney stones could benefit astronauts
July 16, 2018 - Attending Surgeon Influences Genetic Testing in Breast Cancer
July 16, 2018 - Medical doctors with addictions fear professional repercussions if they seek treatment
July 16, 2018 - 5 Questions: John Ioannidis calls for more rigorous nutrition research | News Center
July 16, 2018 - SUSU scientists develop rehabilitation device for people with lower limbs injuries
July 16, 2018 - Researchers find definite increase in scooter-related injuries
July 16, 2018 - Researchers solve mystery of final blood group system
July 16, 2018 - Researchers develop near-infrared fluorophores-based PDT to cure cancer with less side effects
July 16, 2018 - Traumatic brain injury biomarker could help predict patient prognosis
July 16, 2018 - Researchers to investigate role of hormones in mosquito’s ability to use human blood for egg production
July 16, 2018 - AHA: Doctor Makes Lifesaving House Call in His Own Home
July 16, 2018 - Nearsightedness – Genetics Home Reference
July 16, 2018 - Study shows biomarker panel boosts lung cancer risk assessment for smokers
July 16, 2018 - Researchers find link between bereavement during pregnancy, child’s mental health | News Center
July 16, 2018 - Legalizing same-sex marriage has meaningful effects on health care access for sexual-minority men
July 16, 2018 - New York to allow medical marijuana as substitute to opioids
July 16, 2018 - Reducing tapeworm infection could improve academic performance, reduce poverty | News Center
July 16, 2018 - Researchers describe key role of enzyme in regulating immune response against Chagas disease parasite
July 16, 2018 - Johnson & Johnson Announces Publication in The Lancet Highlighting Robust Immune Response to Janssen’s Mosaic-based Preventive Vaccine Regimen for HIV
July 16, 2018 - Do Racial and Gender Disparities Exist in Newer Glaucoma Treatments?
July 16, 2018 - Antibodies may predict transplant rejection risk
July 16, 2018 - New center sets out to stop disease before it starts | News Center
July 16, 2018 - FDA warns consumers about criminals sending fake warning letters
July 16, 2018 - Residential segregation linked with racial disparities in firearm homicide fatalities
July 16, 2018 - UW-Madison researchers develop new method to track Parkinson’s damage in the heart
July 16, 2018 - New approach to cultivate hypoallergenic tomato and strawberry varieties
July 16, 2018 - Smoking associated with delayed shinbone healing
July 16, 2018 - Sheila Dolezal, ‘team player extraordinaire,’ wins 2018 Amy J. Blue Award | News Center
July 16, 2018 - Advanced Prostate Cancer Variant More Common Than Thought
July 16, 2018 - New ways to conquer sleep apnea compete for place in bedroom
July 16, 2018 - Renowned microbe hunter Stanley Falkow dies at 84 | News Center
July 15, 2018 - FDA Slaps Stronger Warnings on Potent Class of Antibiotics, Fluoroquinolones
July 15, 2018 - Don’t let depression keep you from exercising
July 15, 2018 - Student research symposium showcases curiosity and scholarship | News Center
July 15, 2018 - Heavy smokers have increased risk of heart rhythm disorder, shows study
July 15, 2018 - Parents who had severe trauma, stresses in childhood more likely to have kids with behavioral health problems
July 15, 2018 - At colloquium, a range of views on value of predictive algorithms | News Center
July 15, 2018 - Pittcon invites oral and poster presentations for 2019 Technical Program
July 15, 2018 - Virtual reality could offer psychotherapy for fear of heights, study shows
July 15, 2018 - Retooled vaccine raises hopes as a lower-cost treatment for Type 1 diabetes
July 15, 2018 - Kolon TissueGene To Start US Phase III Clinical Trial For Invossa
July 15, 2018 - Study finds prenatal marijuana use can affect infant size, behavior
July 15, 2018 - Howard Chang named HHMI investigator | News Center
July 15, 2018 - Study shows tailored mental health services improve wellbeing of emerging adults
July 15, 2018 - A bright future might help teens steer clear of violence
July 15, 2018 - Stanford Medicine magazine explores the art, science of listening and hearing | News Center
July 15, 2018 - New study tracks how the brain turns simple sensory inputs into meaningful categories
July 15, 2018 - Deadlier subtype of metastatic prostate cancer found to be common than previously thought
July 15, 2018 - UZH scientists identify enzyme that controls cell division
July 15, 2018 - Unhealthy Food Behaviors May Signal Eating Disorder in Teen
July 15, 2018 - Study raises doubts on a previous theory of Parkinson’s disease
July 15, 2018 - Grant awarded to study whether stem cells can treat urinary incontinence | News Center
July 15, 2018 - Imaging techniques may help assess immune system recovery in HIV patients
July 15, 2018 - Machine-learning may aid in diagnosis and treatment of mental health disorders
July 15, 2018 - ‘Skin Cancer, Take A Hike!’ program promotes sun safety and skin cancer awareness
July 15, 2018 - Blink Health announces lowest prices for generic prescriptions through Blue Eagle Health
July 15, 2018 - New drug strategy can alleviate multiple behavioral, cellular deficiencies in FXS mouse model
July 15, 2018 - Georgia State professor receives federal grant to study virus similar to Ebola virus
July 15, 2018 - Quitting Smoking? Even a Little Exercise Can Help You Stay Slim
July 15, 2018 - DBS treatment may slow the progression of Parkinson’s tremor in early-stage patients
July 15, 2018 - 5 Questions: Luby on virus with potential to cause global pandemic | News Center
July 15, 2018 - Corn loses its cancer-fighting phenolic acids when processed into cornflakes
July 15, 2018 - Study uncovers possible link between iron loading, alcohol intake and mortality
July 15, 2018 - Molecular insights of NagA enzyme could help combat TB
Green tea extract delivers molecular punch to disrupt formation of neurotoxic species

Green tea extract delivers molecular punch to disrupt formation of neurotoxic species

image_pdfDownload PDFimage_print
Credit: McMaster University

Green tea is widely considered to be beneficial for the brain. The antioxidant and detoxifying properties of green tea extracts help fight catastrophic diseases such as Alzheimer’s. However, scientists have never fully understood how they work at the molecular level and how they could be harnessed to find better treatments.

Research from McMaster University is shedding new light on those underlying mechanisms. Preclinical evidence suggests that the green tea compound known as EGCG interferes with the formation of toxic assemblies (oligomers), one of the prime suspects in the early steps of the molecular cascade that leads to cognitive decline in Alzheimer’s patients.

“At the molecular level, we believe EGCG coats toxic oligomers and changes their ability to grow and interact with healthy cells,” explains Giuseppe Melacini, lead author and a professor in the Departments of Chemistry and Chemical Biology as well as of Biochemistry and Biomedical Sciences at McMaster, who has worked on Alzheimer’s-related research for 15 years.

The findings, which are the results of a decade of advancements in nuclear magnetic resonance (NMR) methodology and are featured in the cover page of the Journal of the American Chemical Society, could lead to new therapies and further drug discovery, say researchers.

Despite decades of research, the causes of Alzheimer’s remain not fully understood, and treatment options are limited. According to the latest census numbers, seniors living in Canada now outnumber children, dramatically increasing the need for effective drugs and prevention. By some estimates, the number of Canadians with dementia is expected to rise to 937,000 by the year 2031, an increase of 66 per cent compared to current numbers.

“We all know that currently there is no cure for Alzheimer’s once symptoms emerge, so our best hope is early intervention. That could mean using green tea extracts or their derivatives early on, say 15 to 25 years before any symptoms ever set in,” says Melacini.

Next, researchers hope to tackle nagging problems such as how to modify EGCG and similar molecules so they can be used effectively as a food additive, for example. EGCG is unstable at room temperature and notoriously difficult to deliver into the human body, particularly the brain.

“Food additives could prove to be a crucial therapy or adjuvant” says Melacini. “It will be important to capitalize on them early in life to increase the odds of healthy aging, in addition to exercise and a healthy lifestyle.”


Explore further:
Finding ways to detect and treat Alzheimer’s disease

More information:
Rashik Ahmed et al. Molecular Mechanism for the (−)-Epigallocatechin Gallate-Induced Toxic to Nontoxic Remodeling of Aβ Oligomers, Journal of the American Chemical Society (2017). DOI: 10.1021/jacs.7b05012

Journal reference:
Journal of the American Chemical Society

Provided by:
McMaster University

Tagged with:

About author

Related Articles