a direct pcr approach to accelerate analyses of human-associated microbial communities直接pcr方法加速human-associated微生物群落的分析.pdfVIP

A Direct PCR Approach to Accelerate Analyses of Human- Associated Microbial Communities 1 1 1,2 Gilberto E. Flores , Jessica B. Henley , Noah Fierer * 1 Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, United States of America, 2 Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado, United States of America Abstract Since the composition of the human microbiome is highly variable both within and between individuals, researchers are increasingly reliant on high-throughput molecular approaches to identify linkages between the composition of these communities and human health. While new sequencing technologies have made it increasingly feasible to analyze large numbers of human-associated samples, the extraction of DNA from samples often remains a bottleneck in the process. Here we tested a direct PCR approach using the Extract-N-Amp Plant PCR Kit to accelerate the 16S rRNA gene-based analyses of human-associated bacterial communities, directly comparing this method to a more commonly-used approach whereby DNA is first extracted and purified from samples using a series of steps prior to PCR amplification. We used both approaches on replicate samples collected from each of five body habitats (tongue surface, feces, forehead skin, underarm skin, and forearm skin) from four individuals. With the exception of the tongue samples, there were few significant differences in the estimates of taxon richness or phylogenetic diversity obtained using the two approaches. Perhaps more importantly, there were no significant differences between the methods in their ability resolve body habitat differences or inter-individual differences in bacterial communi