What is it about?
Down syndrome (DS) is the most common chromosomal survival aneuploidy. The increase in DS life expectancy heightens the risk of dementia, principally Alzheimer's disease (AD). AD risk in DS is higher, considering that this population may also develop metabolic diseases such as obesity, dyslipidemias, and diabetes mellitus. The extra genetic material that characterizes DS causes an imbalance in the genetic dosage, including over-expression of AD's key pathophysiological molecules and the gene expression regulators, the microRNAs (miRNAs). We studied their profiles in two groups of DS patients.
Photo by Nathan Anderson on Unsplash
Why is it important?
Two biomolecules (miRNAs), chromosome 21-encoded, (miR-155, and let-7c), are associated with cognitive impairment and dementia in adults. This research focuses on their expression dynamics and their link with clinical variables during the DS's lifespan. Overall, our results show that let-7c plays a role from the early stages of cognitive impairment in DS. While overexpression of miR-155 may be related to lipid metabolism changes.
Read the Original
This page is a summary of: Profiling of circulating chromosome 21‐encoded
‐155, and let‐7c, in down syndrome, Molecular Genetics & Genomic Medicine, April 2022, Wiley, DOI: 10.1002/mgg3.1938.
You can read the full text:
The following have contributed to this page