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Consistent decrease in global DNA methylation and hydroxymethylation in the hippocampus of Alzheimer's disease patients.

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TLDR
Human postmortem results strengthen the notion that AD is associated with alterations in DNA methylation and hydroxymethylation, and provide a basis for further epigenetic studies identifying the exact genetic loci with aberrant epigenetic signatures.
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This article is published in Neurobiology of Aging.The article was published on 2013-09-01 and is currently open access. It has received 351 citations till now. The article focuses on the topics: DNA Hydroxymethylation & DNA methylation.

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Epigenetic Factors in Late-Onset Alzheimer’s Disease: MTHFR and CTH Gene Polymorphisms, Metabolic Transsulfuration and Methylation Pathways, and B Vitamins

TL;DR: The importance of supplementing vitamin B12 (methylcobalamin, vitamin B9 (folic acid), vitamin B6 (pyridoxine), and SAM to patients in early stages of LOAD is emphasized.
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Role of epigenetics in Alzheimer's disease pathogenesis.

TL;DR: Findings clearly show that epigenetic mechanisms in Alzheimer's disease are dysregulated during disease progression, already in its early stages, but it is not clear if the observed epigenetic changes represent a cause or a consequence of the disease.
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Altering 5-hydroxymethylcytosine modification impacts ischemic brain injury.

TL;DR: 5hmC modifications at the promoter region of brain-derived neurotrophic factor (BDNF) increased, which was accompanied by increased BDNF mRNA, whereas the inhibition of Tet2 reduced BDNF RNA and protein expression, and the abundance of 5hmC in blood samples from patients with acute ischemic stroke was increased.
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Opening up the DNA methylome of dementia

TL;DR: This review provides an in-depth summary of the current knowledge about DNA methylation in dementia, focusing exclusively on the analyses performed in human brain.
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Human pluripotent stem cell-derived models and drug screening in CNS precision medicine.

TL;DR: This work reviews advances in deriving cellular models of human central nervous system (CNS) disorders using iPSCs along with strategies for investigating disease‐relevant phenotypes, translatable biomarkers, and therapeutic targets and focuses on phenotype‐based, small‐molecule screens employing human stem cell–derived models.
References
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Epigenetic regulation of gene expression: how the genome integrates intrinsic and environmental signals

TL;DR: Advances in the understanding of the mechanism and role of DNA methylation in biological processes are reviewed, showing that epigenetic mechanisms seem to allow an organism to respond to the environment through changes in gene expression.
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Conversion of 5-Methylcytosine to 5-Hydroxymethylcytosine in Mammalian DNA by MLL Partner TET1

TL;DR: It is shown here that TET1, a fusion partner of the MLL gene in acute myeloid leukemia, is a 2-oxoglutarate (2OG)- and Fe(II)-dependent enzyme that catalyzes conversion of 5mC to 5-hydroxymethylcytosine (hmC) in cultured cells and in vitro.
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Alzheimer's Disease Is a Synaptic Failure

TL;DR: Mounting evidence suggests that this syndrome begins with subtle alterations of hippocampal synaptic efficacy prior to frank neuronal degeneration, and that the synaptic dysfunction is caused by diffusible oligomeric assemblies of the amyloid β protein.
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The Nuclear DNA Base 5-Hydroxymethylcytosine Is Present in Purkinje Neurons and the Brain

TL;DR: It is shown that, as well as 5mC in mammalian genomes, there are also significant amounts of 5-hydroxymethylcytosine (5hmC) in DNA of Purkinje neurons, which have large nuclei with apparently very little heterochromatin.
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Linking DNA methylation and histone modification: patterns and paradigms

TL;DR: Relationships between DNA methylation and histone modification have implications for understanding normal development as well as somatic cell reprogramming and tumorigenesis.
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