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The Pines October 28, 2013 Genomic Medicine A.Malcolm Campbell James G. Martin Genomics Program Director Professor of Biology, Davidson College
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Outline of Talk 1.What is a genome? 2.How to sequence genomes? 3.Diagnose and Treat Cancers Better? 4.New Drugs from Failures: Iressa 5.New Treatment Paradigms 6.Gut microbiome
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Science Presentation Give you the data, help you interpret.
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What is a Genome?
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Genetic information that you unique Human genome 3.4 billion base pairs G:C or A:T base pairs ~23,000 genes What is a Genome?
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If the human genome were compiled in books: 200 volumes, 1000 pages each read 10 bases/second = 315,360,000 bases/year 9.5 years to read out loud (without stopping) What is the Human Genome?
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Determine order of bases on all 23 (24) chromosomes Can only read 30 to 700 bases at a time Cannot sequence a genome in one run “Whole Genome Shotgun” sequencing How do you sequence a genome?
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Determine order of bases on all 23 (24) chromosomes Can only read 30 to 700 bases at a time Cannot sequence a genome in one run “Whole Genome Shotgun” sequencing How do you sequence a genome?
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Modern Genome Sequencing
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This is an analogy for genome assembly. This page will be torn into horizontal strips. Modern Genome Sequencing
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is an s an This i
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Modern Genome Sequencing is a s an This i
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Modern Genome Sequencing is a s an This i This is an analogy for genome assembly. This page will be torn into horizontal strips.
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You don’t know the language or syntax.
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Huge Pile of Strips
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Needle in a Haystack?
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Reassemble the Tree from Paper
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Modern Genome Sequence Assembly multiple copies of genome consensus genome sequence aligned sequencing reads
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Modern Genome Sequence Assembly multiple copies of genome consensus genome sequence aligned sequencing reads
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Modern Genome Sequence Assembly multiple copies of genome consensus genome sequence aligned sequencing reads high coveragelow coverage
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Modern Genome Sequence Assembly multiple copies of genome consensus genome sequence aligned sequencing reads
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Reference Genome Assembly ATGGCATTGCAA TGGCATTGCAATTTG AGATGGTATTG GATGGCATTGCAA GCATTGCAATTTGAC ATGGCATTGCAATTT AGATGGTATTGCAATTTG
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Reference Genome Assembly ATGGCATTGCAA TGGCATTGCAATTTG AGATGGTATTG GATGGCATTGCAA GCATTGCAATTTGAC ATGGCATTGCAATTT AGATGGTATTGCAATTTG consensus AGATGGCATTGCAATTTGAC
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206 bones > 60 organs How do I remember them all?
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206 bones > 60 organs Think like a genomicist…
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1 – 22 + X & Y
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Even Easier GCATGCAT
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Is there a better way to diagnose and treat cancers?
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Diffuse Large B Cell Lymphoma (DLBCL)
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Diffuse Large B Cell Lymphoma (DLBCL) 25,000 new cases each year in America Half of patients die despite chemotherapy Why subject them to chemo if not helpful?
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Who will benefit from chemotherapy? Brown and Botstein
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Who will benefit from chemotherapy? control setpatient and control biopsies
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Measure Gene Activity in All Cells
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Characterize Cancers by Gene Activity
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Retrospective Clinical Outcomes based on gene activity
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Retrospective Clinical Outcomes based on gene activitytraditional prediction
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Retrospective Clinical Outcomes wrong 27% wrong 32%
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Retrospective Clinical Outcomes wrong 37%
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Resort Low Risk Patients wrong 37% wrong 29%
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Six Key Indicator Genes Genes On LMO2 BCL6 FN1 BCL2 SCYA3 CCND2 chemono chemo
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Can Breast Cancer Treatment Be Improved?
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tissue biopsies
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Can Breast Cancer Treatment Be Improved?
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No Patterns Emerged control setpatient biopsies
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People Are More Unique Than Their Cancers before (BE) and after (AF) chemotherapy
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Characterize Cancers by Personal Differences
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“Breast Cancer” is a Misnomer
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There are at least 5 Different Breast Cancers
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No such thing as THE cure for cancer.
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The Discovery of Iressa non-small cell lung cancer
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Success from Failure: Iressa
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Cancer Treatment from Nature’s Oddities Naked Mole Rat (NMR)
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Face That Only A Mother Could Love
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Face That Only A Mother Could Love?
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Cancer Treatment from Nature’s Oddities lives 40 years never has cancer lives 4 years tumors common
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high-molecular-mass hyaluronan (HA), What prevents cancer in naked mole rats?
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5 times bigger than human HA lower degradation rate than human What prevents cancer in naked mole rats?
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HA Over Produced in NMR Tissues
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relative amount of HA
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Block HA Tumors Form neg. control carcinogen 1 carcinogen 2 carcinogen 3 mouse cells NMR NMR - HA
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neg. control carcinogen 1 carcinogen 2 carcinogen 3 NMR NMR - HAmouse cells Block HA Tumors Form
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neg. control carcinogen 1 carcinogen 2 carcinogen 3 NMR cells NMR - HAmouse cells Block HA Tumors Form
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neg. control carcinogen 1 carcinogen 2 carcinogen 3 NMR no HAmouse cells NMR cells Block HA Tumors Form
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Inject Mice with NMR Cells +/- HA tumors NMR cells ++ HAase NMR cells HA not made injectiontumorsrecipient mouse tumor
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Inject Mice with NMR Cells +/- HA NMR cells ++ HAase NMR cells HA not made injectiontumorsrecipient mouse tumor
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Inject Mice with NMR Cells +/- HA NMR cells ++ HAase NMR cells HA not made injectiontumorsrecipient mouse tumor
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Inject Mice with NMR Cells +/- HA NMR cells ++ HAase NMR cells HA not made injectiontumorsrecipient mouse tumor
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Inject Mice with NMR Cells +/- HA NMR cells ++ HAase NMR cells HA not made injectiontumorsrecipient mouse tumor
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Inject Mice with NMR Cells +/- HA NMR cells ++ HAase NMR cells HA not made injectiontumorsrecipient mouse tumor
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Inject Mice with NMR Cells +/- HA NMR cells ++ HAase NMR cells HA not made injectiontumorsrecipient mouse tumor
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Inject Mice with NMR Cells +/- HA NMR cells ++ HAase mouse tumor NMR cells HA not made injectiontumorsrecipient
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Cancer Treatment from Nature’s Oddities
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Remember this next time Congress makes fun of scientists studying odd creatures.
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Human Body Is Mostly Non-Human 50 trillion human cells
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500 trillion non-human cells Human Body Is Mostly Non-Human
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50 trillion human cells 500 trillion non-human cells 10% human, 90% bacterial Human Body Is Mostly Non-Human
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Define the Human Microbiome 27 sites 9 adults 4 occasions
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each sample colored by location clustered by similar species Define the Human Microbiome
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Human Microbiome by Location
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Two Types of Skin Habitats
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Human Microbiome by Location
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Human Microbiome Variations
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Microbiome Transplant Experiments compare to transplants compare to natives
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Human Microbiome Variations compare to transplants compare to natives
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Human Microbiome Variations forearm sustains transplantsforehead replaces transplants
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Human Microbiome many skin sites more diversity than gut high-diversity skin sites forearm palm index finger back knee sole of the foot
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Myth Busters: dog’s mouth is really clean
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mice fed low doses of antibiotics long term 15% more body fat than the control mice, Medical Uses of Microbiome
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sequenced bacteria in stool samples humans 55 were thin 122 overweight or obese Medical Uses of Microbiome
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obese people lack bacterial diversity in guts antibiotics reduce microbiome diversity Medical Uses of Microbiome
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obese people lack bacterial diversity in guts missing microbes methane producers, “the carbon that does not get out as gas could be incorporated as fat.” Medical Uses of Microbiome
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Using six species, predict obese 80% of the time Predictions based on genetics only 58% of the time Medical Uses of Microbiome
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Guess what is being tested now…
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fecal transplants
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Thanks to my Colleagues Laurie Heyer Leland Taylor ‘12 supported by James G. Martin Genomics Program Davidson College
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