Identifying Genetic Variants Linked to Low-Density Lipoprotein Cholesterol
Author Information
Author(s): Sanna Serena, Li Bingshan, Mulas Antonella, Sidore Carlo, Kang Hyun M., Jackson Anne U., Piras Maria Grazia, Usala Gianluca, Maninchedda Giuseppe, Sassu Alessandro, Serra Fabrizio, Palmas Maria Antonietta, Wood William H. III, Njølstad Inger, Laakso Markku, Hveem Kristian, Tuomilehto Jaakko, Lakka Timo A., Rauramaa Rainer, Boehnke Michael, Cucca Francesco, Uda Manuela, Schlessinger David, Nagaraja Ramaiah, Abecasis Gonçalo R.
Primary Institution: Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche (CNR), Monserrato, Italy
Hypothesis
Some unexplained heritability in LDL-C may be due to common and rare variants that lack appropriate proxies in modern genotyping arrays.
Conclusion
The study found that focusing on variants accessible via GWAS can lead to underestimates of the heritability explained by certain loci.
Supporting Evidence
- Sequencing identified 782 variants in the studied genes.
- LDL-C heritability estimates increased from 3.1% to 6.5% after including newly identified variants.
- Variants in the PCSK9 locus explained the GWAS signal previously attributed to common variants.
Takeaway
Scientists looked at genes related to cholesterol levels in people from Sardinia and found new genetic variants that help explain why some people have high or low cholesterol.
Methodology
The study sequenced genes in 256 Sardinian individuals and genotyped variants in 5,524 volunteers to assess LDL-C levels.
Limitations
The study focused only on coding regions and may miss very rare or population-specific variants.
Participant Demographics
The study included 256 Sardinian individuals with extreme LDL-C levels and 5,524 volunteers from the SardiNIA project.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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