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Detection of MicroRNAs in Microglia by Real-time PCR in Normal CNS and During Neuroinflammation
Published on: July 23, 2012
MicroRNAs in brain aging
Chand Parvez Danka Mohammed1, Jun Soo Park2, Hong Gil Nam3
1Center for Plant Aging Research, Institute for Basic Science (IBS), Daegu 711-873, South Korea; Department of New Biology, DGIST, Daegu 711-873, South Korea; Department of Life Sciences, POSTECH, Pohang 790-784, South Korea.
Abstract:
Brain aging is one of the most crucial biological processes that affect the physiological balance between health and disease. Age-associated dysfunction of brain leads to severe health problems in current aging society. MicroRNAs (miRNAs) have emerged as important regulators in most physiological processes including fine-tuning of the short-term, cellular regulatory functions as well as modulation of long-term organismal lifespan. In this review, we discuss critical roles of miRNAs in the progression of normal and pathological brain aging. 50% of all known miRNAs are found in brain including cortex and hippocampus. A significant number of expressed miRNAs were differentially regulated during aging, implicating miRNAs as regulators of brain aging. The ability of miRNAs to regulate multiple targets within a pathway or even multiple pathways allows for coordinated regulation of brain functions. miRNA-mediated, brain functional changes are evident in cognition, inflammation, neuroprotection, lipid metabolism, mitochondrial function and lifespan. Dysregulation of brain miRNAs contributes to accelerated cognitive decline and increased neurological disorders. Elucidating mechanisms by which miRNAs and their multiple targets are temporally and spatially regulated in normal and pathological brain aging will provide a deeper understanding on the process of interrelated pathways of brain aging, and a new insight into therapeutic interventions.
Insights
MicroRNAs (miRNAs) are key regulators of brain aging, influencing cognition and lifespan. Understanding their roles offers new therapeutic insights for age-related neurological disorders.
Area of Science:
- Neuroscience
- Molecular Biology
- Gerontology
Background:
- Brain aging is a critical process impacting health and disease, with age-associated brain dysfunction posing significant challenges.
- MicroRNAs (miRNAs) are vital regulators of physiological processes, including cellular functions and organismal lifespan.
- The brain, particularly the cortex and hippocampus, hosts a large proportion of known miRNAs, highlighting their potential significance in brain function.
Purpose of the Study:
- To review the critical roles of microRNAs (miRNAs) in both normal and pathological brain aging.
- To explore how miRNAs modulate key brain functions affected by aging, such as cognition, inflammation, and neuroprotection.
- To discuss the implications of miRNA dysregulation in accelerated cognitive decline and neurological disorders.
Main Methods:
- This is a review article, synthesizing existing research on miRNAs and brain aging.
- Analysis of literature focusing on the differential regulation of miRNAs during the aging process.
- Examination of studies investigating miRNA-mediated effects on brain functions and their targets.
Main Results:
- A significant number of expressed miRNAs are differentially regulated during brain aging, indicating their regulatory role.
- miRNAs coordinate brain functions including cognition, inflammation, neuroprotection, lipid metabolism, and mitochondrial function.
- Dysregulation of brain miRNAs is linked to accelerated cognitive decline and increased susceptibility to neurological disorders.
Conclusions:
- MicroRNAs are crucial regulators of normal and pathological brain aging.
- Understanding miRNA mechanisms in brain aging provides insights into interrelated pathways.
- Elucidating miRNA regulation offers potential for novel therapeutic interventions against age-related brain dysfunction.
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