Abstract
DNA extraction methods play an important role in the acquisition of accurate and reproducible 16S sequencing data in microbiome studies. In this study, we assessed the impact of bead-beating intensity during DNA extraction on microbiome recovery in mouse and human stool. We observed a higher DNA yield, better DNA integrity, higher Shannon’s entropy and Simpson’s index in samples beaten for 4 and 9 minutes as compared to unbeaten samples. 16S sequencing data showed that bead beating has a statistically-significant (p<0.05) impact on the recovery of many clinically relevant microbes that live in the mouse and human gut, including Bifidobacterium, Sutterella and Veillonella. It was observed that 4 minutes of bead beating promotes recovery of about 70% of OTUs in mouse and human stool, while the remaining 30% requires longer bead beating. In conclusion, our study indicates adjustments in bead beating treatment based on the composition of the specimen and the targeted bacteria.
Footnotes
↵* Microbiome Research Laboratory (MRL)
