In a special issue of the Journal of Alzheimer's Disease published this month, ten contributions from worldwide experts in the field examine possible linkages between folate and homocysteine and Alzheimer's disease.
In the lead article Guest Editor Thomas Shea, Professor and Director of the Center for Cellular Neurobiology and Neurodegeneration Research, University of Massachusetts Lowell, suggests “Alzheimer’s disease has a multifactoral etiology, encompassing genetic and nutritional risk factors, and no single risk factor can account for all cases.…A genetic predisposition may remain latent pending an age-related critical decline in nutrition. This has confounded the linkage of nutrition to Alzheimer’s disease, since contributing nutritional deficiencies may remain undetected, and, even if considered, may not receive sufficient attention if they are benign in isolation.”
Andrew McCaddon from the Wales College of Medicine contributes some historical perspective on homocysteine and folate levels and the development of dementia, including some discussion of the potential for reversing such declines.
Aron M. Troen and colleagues from Tufts University write of their studies of mice fed diets to create excess homocysteine levels and then tested for cognitive functions. Sudha Seshadri discusses whether elevated homocysteine levels is a risk factor for dementia or merely a risk marker for some underlying process. Amy Chan and Thomas B. Shea then examine the connection between dietary deficiencies of folate and Vitamin E and the development of neurofibrillary tangles of tau protein, a hallmark of Alzheimer's disease.
Moving on to possible therapies, Sigfrido Scarpa and colleagues at the University of Rome investigated S-adenosylmethionine (SAM) metabolism in cell cultures, which might be used to interfere with amyloid-ß overproduction, another characteristic of AD. In a second contribution from that institution, Rosaria A. Cavallaro and co-workers looked at whether SAM administration influences gene expression in the brain.
Flaubert Tchantchou of the University of Maryland School of Pharmacy discusses the various metabolic processes involved in homocysteine regulation and the various consequences of folate deficiency.
Folate is one of the B vitamins. Martha Clare Morris and colleagues at the Rush University Medical Center expand on the possible role of all of the B vitamins in cognitive decline and comment on the potential benefits and harms of vitamin supplementation. In another contribution, Morris and coworkers report on a prospective cohort study of 1041 patients where dietary folate, B-12 and B-6 levels were not associated with the development of Alzheimer's disease.SPECIAL ISSUE: FOLATE AND HOMOCYSTEINE IN ALZHEIMERS DISEASE
Aron M. Troen, Barbara Shukitt-Hale, Wei-Hsun Chao, Bina Albuquerque, Donald E. Smith, Jacob Selhub, Jacob RosenbergElevated plasma homocysteine levels: Risk factor or risk marker for the development of dementia and Alzheimer's disease?
Sudha SeshadriDietary and genetically-induced oxidative stress alter tau phosphorylation: Influence of folate and apolipoprotein E deficiency
Amy Chan and Thomas B. SheaGene silencing through methylation: An epigenetic intervention on Alzheimer disease
Sigfrido Scarpa, Rosaria A. Cavallaro, Fabrizio D'Anselmi, Andrea FusoThe effect of S-adenosylmethionine on CNS gene expression studied by cDNA microarray analysis
Rosaria A. Cavallaro, Andrea Fuso, Fabrizio D'Anselmi, Laura Seminara, Sigfrido ScarpaHomocysteine metabolism and various consequences of folate deficiency
Martha Clare Morris, Denis A. Evans, Julie A. Schneider, Christine C. Tangney, Julia L. Bienias, Neelum T. AggarwalSelected Abstracts From the "Wellness For Persons With Dementia" Symposium
Astrid Engelen | alfa
New malaria analysis method reveals disease severity in minutes
14.08.2017 | University of British Columbia
New type of blood cells work as indicators of autoimmunity
14.08.2017 | Instituto de Medicina Molecular
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
18.08.2017 | Life Sciences
18.08.2017 | Physics and Astronomy
18.08.2017 | Materials Sciences