Searching for the Genetic Cause of Variably Protease-Sensitive Prionopathy
Author Information
Author(s): Lian Yuan, Kotobelli Keisi, Hall Stacey, Talkowski Michael E, O’Donnell-Luria Anne, Vallabh Sonia M, Appleby Brian S, Minikel Eric Vallabh
Primary Institution: Broad Institute of MIT and Harvard
Hypothesis
Could variably protease-sensitive prionopathy (VPSPr) be caused by genetic variants in genes other than PRNP?
Conclusion
The study found no potentially causal genetic variants for VPSPr, supporting its classification as a sporadic prion disease.
Supporting Evidence
- VPSPr is classified as a sporadic prion disease due to the absence of identified genetic variants.
- PRNP M129V was found to be the largest genetic risk factor for VPSPr with an odds ratio of 7.0.
- 42% of VPSPr patients in the study had a positive family history of dementia.
Takeaway
Researchers looked for a genetic cause of a rare brain disease but didn't find any specific DNA changes that could explain it.
Methodology
Exome sequencing and targeted sequencing of PRNP non-coding regions were performed on genomic DNA from autopsy-confirmed VPSPr patients.
Potential Biases
Potential bias due to the lack of matched controls and the small sample size.
Limitations
The study did not perform whole genome sequencing and did not include matched controls, limiting the ability to identify variants of small effect.
Participant Demographics
The cohort included 67 autopsy-confirmed VPSPr cases with a majority being 129VV genotype.
Statistical Information
P-Value
0.0012
Confidence Interval
95%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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