Regional and neuronal reductions of polyadenylated messenger RNA in Alzheimer's disease.

Abstract:

:Messenger RNA (mRNA) is the key intermediate in the gene expression pathway. The amount of mRNA in Alzheimer's disease (AD) brains has been determined using in situ hybridization histochemistry (ISHH) to detect the poly(A) tails of polyadenylated mRNA (poly(A) + mRNA). On a regional basis, AD cases had significantly less poly(A) + mRNA than controls in hippocampus (field CA3) and cerebellum (granule cell layer). Analysis of constituent pyramidal neurons showed mean reductions per cell within AD hippocampus (field CA3) and temporal cortex, but not in visual cortex. Similar changes were seen in a small group of non-AD dementias. The finding of reduced poly(A) + mRNA content is another indication of the altered brain gene expression occurring in AD. It is proposed that measurement of poly(A) + mRNA may be valuable in identifying functionally impaired neuronal populations. The methodology also provides a means by which changes in the quantitative distribution of individual mRNAs can be determined relative to that of poly(A) + mRNA as a whole.

journal_name

Psychol Med

journal_title

Psychological medicine

authors

Harrison PJ,Barton AJ,Najlerahim A,McDonald B,Pearson RC

doi

10.1017/s0033291700029858

subject

Has Abstract

pub_date

1991-11-01 00:00:00

pages

855-66

issue

4

eissn

0033-2917

issn

1469-8978

journal_volume

21

pub_type

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