title: Micro-RNA speciation in fetal, adult and Alzheimer's disease hippocampus.
abstract: Micro-RNAs constitute a family of small noncoding ribonucleic acids that are posttranscriptional regulators of messenger RNA activity. Although micro-RNAs are known to be dynamically regulated during neural development, the role of micro-RNAs in brain aging and neurodegeneration is not known. This study examined micro-RNA abundance in the hippocampal region of fetal, adult and Alzheimer's disease brain. The data indicate that micro-RNAs encoding miR-9, miR-124a, miR-125b, miR-128, miR-132 and miR-219 are abundantly represented in fetal hippocampus, are differentially regulated in aged brain, and an alteration in specific micro-RNA complexity occurs in Alzheimer hippocampus. These data are consistent with the idea that altered micro-RNA-mediated processing of messenger RNA populations may contribute to atypical mRNA abundance and neural dysfunction in Alzheimer's disease brain.
authors.affiliation: LSU Neuroscience Center and Department of Ophthalmology, Louisiana State University Health Science Center, New Orleans, LA 70112-2272, USA. wlukiw@lsuhsc.edu
authors.forename: Walter J
authors.initials: WJ
authors.lastname: Lukiw
mesh_terms: D000368:Aged; D000375:Aging / Q000235:genetics* / Q000378:metabolism; D000544:Alzheimer Disease / Q000235:genetics* / Q000378:metabolism* / Q000503:physiopathology; D019143:Evolution, Molecular; D005333:Fetus; D005786:Gene Expression Regulation / Q000235:genetics; D006624:Hippocampus / Q000196:embryology / Q000378:metabolism*; D006801:Humans; D035683:MicroRNAs / Q000235:genetics* / Q000378:metabolism*; D008970:Molecular Weight; D012323:RNA Processing, Post-Transcriptional / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
chemical_list: C578248:MIRN219 microRNA, human; D035683:MicroRNAs; D012333:RNA, Messenger