Impact of DNA source on genetic variant detection from human whole-genome sequencing data
Trost et al.
The finding, in our words
Comparing matched samples from four individuals, this study found that blood-derived DNA yielded a higher percentage of aligned reads and mean read depth than saliva or buccal samples, p<0.05. While limited by a small sample size, these results suggest decentralised saliva or buccal sampling may be less reliable for whole-genome sequencing.
A paraphrase to the Library’s standard, never the abstract. The source is one link away and is always the authority.
This study demonstrated that a fully remote genome sequencing study using self-collected dried blood spots and buccal swabs is feasible for individuals with Prader-Willi syndrome, with all participants completing the study and reporting the process was easy despite being lengthy. The design successfully returned actionable genetic findings, including those related to blood clot formation, to participants.
This study found that a decontamination pipeline using metagenome-assembled genomes improves the accuracy of variant calling from saliva samples, showing superior concordance with blood-derived results compared to conventional methods. These results validate the potential of self-collected oral samples for accurate personal genotyping.
This study of 184 individuals showed that home collection of dried blood spots and saliva can identify genetic polymorphisms linked to cardiac serum markers. Seven SNPs associated significantly with markers such as Apo B, LDL Direct, and hsCRP, while a polygenic risk score correlated strongly with NT-proBNP (r²=0.82, P=.03) and ox-LDL (r²=0.94, P=.005). These results indicate decentralised genetic sampling could enable early cardiovascular risk assessment and identify patients requiring closer serological monitoring.
Telomere length measurements vary significantly depending on the sample type used, with Oragene saliva showing a moderate correlation to venous buffy coat, whereas Oasis saliva and dried blood spots did not yield comparable or adequate results for this assay.
Both blood and saliva collection methods produced sufficient DNA for genotyping, with saliva using Oragene kits being less invasive and more acceptable for participants who declined blood draws, supporting its use in decentralised research settings