Presenilin-1-dependent transcriptome changes.

Mirnics K, Korade Z, Arion D, Lazarov O, Unger T, Macioce M, Sabatini M, Terrano D, Douglass KC, Schor NF, Sisodia SS
J Neurosci. 2005 25 (6): 1571-8

PMID: 15703411 · DOI:10.1523/JNEUROSCI.4145-04.2005

Familial forms of Alzheimer's disease (FADs) are caused by the expression of mutant presenilin 1 (PS1) or presenilin 2. Using DNA microarrays, we explored the brain transcription profiles of mice with conditional knock-out of PS1 (cKO PS1) in the forebrain. In parallel, we performed a transcription profiling of the hippocampus and frontal cortex of the FAD-linked DeltaE9 mutant transgenic (TG) mice and matched controls [TG mice expressing wild-type human PS1 (hPS1)]. When the TG and cKO datasets were cross-compared, the majority of the 30 common expression alterations were in opposite direction, suggesting that the FAD-linked PS1 variant produces transcriptome changes primarily by gain of aberrant function. Our microarray studies also revealed an unanticipated inverse correlation of transcript levels between the brains of mice that coexpress DeltaE9 hPS1+ amyloid precursor protein (APP)695 Swe and DeltaE9 hPS1 single transgenic mice. The opposite directionality of these changes in transcript levels must be a function of APP and/or APP derivatives.

MeSH Terms (22)

Alzheimer Disease Amino Acid Substitution Amyloid beta-Protein Precursor Animals Frontal Lobe Gene Expression Profiling Gene Expression Regulation Hippocampus Humans Membrane Proteins Mice Mice, Knockout Mice, Transgenic Mutation, Missense Nerve Tissue Proteins Oligonucleotide Array Sequence Analysis Point Mutation Presenilin-1 Protein Structure, Tertiary Recombinant Fusion Proteins RNA, Messenger Transcription, Genetic

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