Challenges Facing the Human Gut Microbiome Study Who are there? Profiling the gut microbiota(bacteria, archaea, fungi, viruses)into phylum, species or operational taxonomic unit (OTU) ● What are they doing Profiling the genetic capacity of the microbiota genes pathways) How do they contribute to human health? Establish the functional connections between the gut microbiota and the host's physiological or pathological status
Challenges Facing the Human Gut Microbiome Study Who are there? Profiling the gut microbiota (bacteria, archaea, fungi, viruses) into phylum, species or operational taxonomic unit (OTU) What are they doing? Profiling the genetic capacity of the microbiota (genes, pathways) How do they contribute to human health? Establish the functional connections between the gut microbiota and the host’s physiological or pathological status
The road to Metagenomics Beyond Teaset a.3 Carl Woese microbial Robert Koch isolates microorganisms using as marker for 9, solid cultures taxonomy 1676 1931 1980 1998 2005 2006 2008 2011 2015 1888 1977 1990 Winogradsky Kary Mullis Handelsman et al., GA sequence PacBio Rs sequencer develops PCR experiments First NGS machin released metagenomics' oral mic Fred sange uman Microbiome develops DNA Project publication Ocean sampling Day
The Road to Metagenomics & Beyond
Profiling the Human gut Microbiota o Culture: the gold standard for identification of microbial species <30%of the gut microbiota has been cultured o Culture-independent techniques: offer a more representative snapshot' of the gut microbiota microbial diversity of the gut microbiota >Qualitative and quantitative information on bacterial species and their genetic capacity Changes in the gut microbiota in relation to perturbation or disease
Profiling the Human Gut Microbiota Culture: the gold standard for identification of microbial species <30% of the gut microbiota has been cultured Culture-independent techniques: offer a more representative ‘snapshot’ of the gut microbiota Microbial diversity of the gut microbiota Qualitative and quantitative information on bacterial species and their genetic capacity Changes in the gut microbiota in relation to perturbation or disease
Gut Metagenome Metatranscriptome ● Metagenome宏基因组(元基因组) and metatranscriptome宏转录组(元转 录组) are derived from meta-analysis"-the process of statistically combining separate analyses genome-an organism's genetic material > transcriptome-the totoal transcription products of a genome o Shotgun metagenome and metatranscriptome sequencing the process of sequencing the entire nucleotide pool isolated from a culture-independent sample ● Metaproteome ● Metabolome
Gut Metagenome & Metatranscriptome Metagenome 宏基因组(元基因组) and metatranscriptome 宏转录组(元转 录组) are derived from “meta-analysis” - the process of statistically combining separate analyses “genome” - an organism’s genetic material “transcriptome” - the totoal transcription products of a genome Shotgun metagenome and metatranscriptome sequencing the process of sequencing the entire nucleotide pool isolated from a culture-independent sample Metaproteome Metabolome
Main Forces behind metagenomics O High-throughput sequencing technologies sequencing 1 million nucleotide bases of dna decreased from $10,000 to $o 10 uS dollars between 2001 and 2011 Sequence data of microbe reference strains o Advanced bioinformatical analytic tools and pipelines o High-throughput screening technologies
Main Forces behind Metagenomics High-throughput sequencing technologies sequencing 1 million nucleotide bases of DNA decreased from $10,000 to $0.10 US dollars between 2001 and 2011 Sequence data of microbe reference strains Advanced bioinformatical analytic tools and pipelines High-throughput screening technologies