By measuring the molecular and metabolic changes that occur in the brain, this technique has provided valuable information on brain development and aging, Alzheimer disease, schizophrenia, autism, and stroke.
The role of DNA cytosine methylation, an epigenetic regulator of chromatin structure and function, during normal and pathological brain development and aging remains unclear.
To date, there are no comprehensive studies which have monitored methylation at multiple loci during the course of brain development and aging, or in chronic psychiatric disease.
Most of the cancer-related genes included in this study show aberrant methylation in various types of neoplasia, including CNS tumors (Table S1), and hence we were interested to monitor potential methylation changes within these genes during the course of normal brain development and aging.
UCHL1 is involved in brain development and age-related neurodegenerative pathologies such as Parkinson's disease [ 111].
In the brain, neurons with complex axonal and dendritic structures are dependent on intense transport and efficient proteostasis to accommodate a dynamic microenvironment during both brain development and aging.
This has been and will be a most important and valuable clinical research cohort to study and will help answer questions about vulnerability as well as resiliency in brain development and aging.
In addition, our analysis showing the regulated expression of miR-101 in brain development and ageing and in a neurodegenerative process suggests important roles for this miRNA in nervous system physiology and pathology.
To identify the miRNA synergistic modules related to human brain development and aging, we evaluated the significance of the proportion of age-related miRNAs in each module and tested the correlation of the expression levels of the modules with age by randomly selecting miRNAs as miRNA modules (see the 'Methods' section).
The genes responsible for neuronal growth and synaptogenesis are expressed at their highest levels during early brain development and decline with age, but a stroke event re-initiates the increased expression of these genes for a limited period after stroke [ 21].
Additionally, results of dietary supplementation with SA have not been consistent; some reports show that it promotes inflammation, hepatocellular cancer, and hemolytic-uremic syndrome [ 3, 4], while others have shown that it may be useful for brain development and for certain age-related disorders that cause reduced salivation [ 5, 6].
