Clinical trial of an Alzheimer's disease vaccine: some positive results

( the first report of adjuvant-free vaccines )

PleaseHelpSupport Alzheimer's Research Today!
Your Alzheimer's donation will help billionslive without it. Donate online now

A recent human clinical trial of an Alzheimer's disease (AD) vaccine using amyloid beta (Abeta) 1-42 plus QS-21 adjuvant produced some positive results, but was halted due to meningoencephalitis in some participants. The development of a vaccine with mutant Abeta peptides that avoids the use of an adjuvant may result in an effective and safer human vaccine. RESULTS: All peptides tested showed high antibody responses, were long-lasting, and demonstrated good memory response. Epitope mapping indicated that peptide mutation did not lead to epitope switching. Mutant peptides induced different inflammation responses as evidenced by cytokine profiles. Ig isotyping indicated that adjuvant-free vaccination with peptides drove an adequate Th2 response. All anti-sera from vaccinated mice cross-reacted with human Abeta in APP/PS1 transgenic mouse brain tissue. CONCLUSION: Our study demonstrated that an adjuvant-free vaccine with different Abeta peptides can be an effective and safe vaccination approach against AD. This study represents the first report of adjuvant-free vaccines utilizing Abeta peptides carrying diverse mutations in the T-cell epitope. These largely positive results provide encouragement for the future of the development of human vaccinations for AD. ...http://www.topix.com

Antioxidant OPCs may boost memory

Supplements of oligomeric proanthocyanidins (OPCs) improved memory in animals with age-related cognitive decline, says a new study from Japan and Korea. ...http://www.nutraingredients.com

Беларусь ТВ

Posted YVN