Breaking News
September 25, 2018 - Gene therapy approach could help treat mitochondrial diseases
September 25, 2018 - Few Yogurt Products Qualify As Low-Sugar
September 25, 2018 - Eye disease can cause blindness, and it’s on the rise
September 25, 2018 - Pawnshop density linked to gun-related suicides, Stanford study finds
September 25, 2018 - Pioneering procedure for common prostate condition offered by The London Clinic
September 25, 2018 - Number of people with respiratory diseases likely to increase if UK air pollution remains unchecked
September 25, 2018 - FARXIGA receives positive results in Phase III DECLARE-TIMI 58 cardiovascular outcomes trial
September 25, 2018 - New program to reduce harmful stress effectively improves mood in cancer patients
September 24, 2018 - Florence’s Lingering Threat: Mold – Drugs.com MedNews
September 24, 2018 - For professional baseball players, faster hand-eye coordination linked to batting performance
September 24, 2018 - Bill for later school start times is defeated, but Stanford sleep specialist isn’t
September 24, 2018 - For Heart Failure Patients, Mitral Valve Procedure Improved Outcomes
September 24, 2018 - Successful recovery from addiction means more than achieving abstinence
September 24, 2018 - New nanoplatform technology may reverse drug-resistance in renal cell carcinoma
September 24, 2018 - October 1918 marks the centenary of Spanish Flu that claimed more lives than World War I
September 24, 2018 - LGBT community reports more number of poor mental health days than general population
September 24, 2018 - New research suggests power of zebrafish as tool for cancer drug discovery
September 24, 2018 - New study finds height as possible risk factor for developing varicose veins
September 24, 2018 - Researchers compare weight loss results of online and in-person diabetes prevention program
September 24, 2018 - New HER2 PET Study Uses Affibody’s ABY-025 Tracer to Individualize Breast Cancer Treatment
September 24, 2018 - Drug combination offers more effective care for patients suffering miscarriage
September 24, 2018 - Tallness linked to varicose veins, Stanford study says
September 24, 2018 - For Heart Failure Patients, Mitral Valve Procedure Improved Outcomes
September 24, 2018 - Ecstasy drug makes octopuses more social
September 24, 2018 - Immediate compression therapy could cut risk of complications after deep-vein thrombosis
September 24, 2018 - Transcatheter mitral valve repair reduces mortality for patients with mitral regurgitation
September 24, 2018 - First intracranial aneurysm patients treated with BRAVO Flow Diverter after CE mark approval
September 24, 2018 - ‘Physicians of the mouth’? Dentists absorb the medical billing drill
September 24, 2018 - People more likely to believe those with confident tone of voice than with accent
September 24, 2018 - Harmony Biosciences Presents 5-Year Data On Pitolisant At International Narcolepsy Symposium
September 24, 2018 - Blood test may identify gestational diabetes risk in first trimester
September 24, 2018 - Height may be risk factor for varicose veins | News Center
September 24, 2018 - King’s commemorates opening of new NMR facility with one-day symposium
September 24, 2018 - Eisai receives approval for partial label change of DC Bead device for transcatheter arterial embolization
September 24, 2018 - High-resolution genomic map gives scientists unprecedented view of brain development
September 24, 2018 - Researchers find impact of neurobehavioral symptoms on employment in adults with TBI
September 24, 2018 - Alexion announces positive results from Phase 3 PREVENT study of Soliris in patients with NMOSD
September 24, 2018 - First evaluation of benefits, harms of Alzheimer’s screening for family members of older adults
September 24, 2018 - Ancora Heart announces positive data of study evaluating AccuCinch Ventricular Repair System
September 24, 2018 - Children of mothers using cannabis may start using it at an earlier age, finds study
September 24, 2018 - Gilead Sciences plans to launch authorized generic versions of Epclusa and Harvoni in the US
September 24, 2018 - Most patients who underwent transcatheter valve replacement experience prosthesis-patient mismatch
September 24, 2018 - Lumos acquires license for LUM-201 drug that promotes secretion of growth hormone
September 24, 2018 - New study provides basis for Air Canada to change its facial hair policy for aircrew
September 24, 2018 - Infant walkers lead to thousands of emergency visits for babies
September 24, 2018 - Genes predicting person’s height may provide clues about causes of varicose veins
September 24, 2018 - EPA Plan Will Maintain Carbon Emissions From Power Plants
September 24, 2018 - Characterizing pig hippocampus could improve translational neuroscience
September 24, 2018 - Element3 Health reports social and mental engagement play key role in overall health
September 24, 2018 - Paralympic medalists support Fight for Sight’s unique virtual event
September 24, 2018 - ADCETRIS drug receives approval in Japan as frontline treatment option for Hodgkin lymphoma
September 24, 2018 - Public awareness of urological conditions found to be alarmingly low across Europe
September 24, 2018 - Fitter Folks Suffer Milder Strokes: Study
September 24, 2018 - Novel botulinum toxin compound relieves chronic pain
September 24, 2018 - CHMP recommends approval of Gilenya for treatment of multiple sclerosis in children, adolescents
September 24, 2018 - National Friendly’s private medical insurance is a hit with women living in the South East
September 24, 2018 - Academics receive prestigious awards for achievements in blood pressure research
September 24, 2018 - Obese pregnant women can restrict weight gain safely with proper nutrition guidance
September 24, 2018 - CHMP adopts positive opinion of Takeda’s ALUNBRIG for treatment of ALK+ non-small cell lung cancer
September 24, 2018 - China NMPA approves LENVIMA for treatment of unresectable hepatocellular carcinoma
September 24, 2018 - A new approach for finding Alzheimer’s treatments
September 24, 2018 - USC research uncovers previously unknown genetic risk factor for dementia
September 24, 2018 - Study examining mental health among students finds significant disparities in treatment across race
September 24, 2018 - Breakthrough discovery paves way for future test to identify drowsy drivers
September 24, 2018 - Transcatheter mitral-valve repair in patients with heart failure
September 24, 2018 - Study opens new avenues for treatment of Laing distal myopathy
September 24, 2018 - Stroke Facts | cdc.gov
September 24, 2018 - Sarcolipin tricks muscle cells into using more energy, burning fat
September 24, 2018 - Enrollment in opioid controlled substance agreement reduces primary care visits
September 24, 2018 - UTA researchers patent new smart seat cushion technology that helps prevent painful ulcers
September 24, 2018 - Second HPV-Related Primary Cancers Common in Survivors
September 24, 2018 - How a virus destabilizes the genome
September 24, 2018 - Old letters provide insight into Spanish flu pandemic horror
September 23, 2018 - Smart textile-based soft robotic exosuit helps wearers save energy and traverse difficult terrain
September 23, 2018 - New research hub to drive radical change in development and manufacturing of vaccines
September 23, 2018 - AHA: For Hispanics, Neighborhood May Be Key Factor in Heart Disease Risk
September 23, 2018 - Excessive airway nerves tied to more severe asthma symptoms, study finds
September 23, 2018 - Study highlights need to remain vigilant in maintaining key infection control processes
September 23, 2018 - Novel therapeutic strategy for blood vessel related disorders, such as cancer and retinopathy
September 23, 2018 - New naturally occurring antibiotic found effective against Mycobacterium tuberculosis
Alzheimer’s disease: Neuronal loss very limited

Alzheimer’s disease: Neuronal loss very limited

image_pdfDownload PDFimage_print
PET scan of a human brain with Alzheimer’s disease. Credit: public domain

Frequently encountered in the elderly, Alzheimer’s is considered a neurodegenerative disease, which means that it is accompanied by a significant, progressive loss of neurons and their nerve endings, or synapses. A joint French and Canadian study published in Scientific Reports now challenges this view.

Conducted among more than 170 subjects at various stages of Alzheimer’s disease, the study by the team led by Salah El Mestikawy (Douglas Mental Health University Institute, Canada) and Stéphanie Daumas (Université Pierre et Marie Curie, France) has shown instead that the disease is accompanied by a minor decline in neuronal and synaptic markers.

“Much to our surprise, in studying the fate of eight neuronal and synaptic markers in our subjects’ prefrontal cortices, we only observed very minor neuronal and synaptic losses. Our study therefore suggests that, contrary to what was believed, neuronal and synaptic loss is relatively limited in Alzheimer’s disease. This is a radical change in thinking,” explains El Mestikawy, an associate professor at McGill University.

The scientists also attempted to correlate all these minor synaptic losses with the subjects’ level of dementia. Their results show that the declines in synaptic biomarkers had little impact on the participants’ cognitive skills.

Towards other therapies

The study implicitly suggests that dementia is associated with a synaptic dysfunction rather than the disappearance of synapses from the patient’s cortex. Identifying this dysfunction could lead to the development of effective treatments for this disease.

“Until now, therapeutic interventions have been aimed at slowing synaptic destruction. Based on our study, we are going to have to change our therapeutic approach,” says El Mestikawy.

According to the Alzheimer Society of Canada, 564,000 Canadians currently have Alzheimer’s disease or another form of dementia. The figure will be 937,000 within 15 years. Presently, there is no truly effective treatment for this disease.


Explore further:
Proteomics analyses could present new opportunities to diagnose and treat dementias

More information:
“Moderate decline in select synaptic markers in the prefrontal cortex (BA9) of patients with Alzheimer’s disease at various cognitive stages” Scientific Reports, January 17, 2018. www.nature.com/articles/s41598-018-19154-y

Journal reference:
Scientific Reports

Provided by:
McGill University

Tagged with:

About author

Related Articles