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Altered gene expression in Alzheimer's disease brain tissue
P C May1, S A Johnson, J Poirier
1Andrus Gerontology Center, University of Southern California, Los Angeles 90089-0191.
Summary
Researchers identified a novel Alzheimer's disease (AD) marker, pADHC-9, in the brain. This marker shows increased RNA levels in AD patients, suggesting its potential role in the disease.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Alzheimer's disease (AD) is characterized by altered gene expression in the brain.
- Identifying novel molecular markers is crucial for understanding AD pathogenesis.
Purpose of the Study:
- To review evidence of altered gene expression in Alzheimer's disease (AD) brain.
- To identify novel molecular markers for AD using alternative approaches.
Main Methods:
- Differential screening of a human hippocampal cDNA library using AD and control cDNA probes.
- Isolation and characterization of the pADHC-9 marker.
- RNA analysis to quantify expression levels.
Main Results:
- A novel marker, pADHC-9, was isolated from the human hippocampus.
- pADHC-9 hybridizes to a 2 Kb RNA transcript.
- This RNA transcript is upregulated twofold in the AD hippocampus compared to controls.
- The deduced protein sequence shows similarity to a rat testicular sulfated glycoprotein.
Conclusions:
- The pADHC-9 marker and its corresponding RNA are elevated in Alzheimer's disease (AD) hippocampus.
- The protein encoded by pADHC-9 has structural similarities to a known protein in rat Sertoli cells.
- The normal function of this protein in the brain and its specific role in AD remain to be elucidated.