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Demys&fying Medicine 29 March 2016

Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

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Page 1: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Demys&fyingMedicine29March2016

Page 2: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

TheHumanMicrobiomeProjectca.1690

Antony van Leeuwenhoek Three important points 1.  The first direct observation of

bacteria was of those from within the human mouth.

2.  No association between microbes and disease

3.  This first observation revealed human-associated microbial communities to be complex

"...[T]heres<ckethorgrowethbetweensomeofmyfront[teeth]andmygrinders...aliDlewhitemaDer,whichisasthickasif'twerebaDer.Onexaminingthis...Imostalwayssaw,withgreatwonder,thatinthesaidmaDerthereweremanyveryliDlelivinganimalcules,verypreLlya-moving”

Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules.” London. Constable & Co. 1932. Print.

Page 3: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

TheHumanMicrobiomeProjectca.2016

HumanMicrobiome

HumanGenome

100xthehumangenome

Page 4: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

TheHumanMicrobiomeProject2013

NetworkInferenceCo-occurrenceorco-exclusionobserva<onsminedtoiden<tysta<s<callysignificantrela<onships.TaxaclusterbasedonbodysiteIsthisabiologicallyrelevantspa<alscales?

Faust, et al. 2012. PLoS Comput. Biol. 8:e1002606

Page 5: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Spa<aldistribu<onofmicrobes:relevantscales

MowatandAgace.2014.Nat.Rev.Immunol.14:667-685. Grice and Segre. 2011. Nat. Rev. Microbiol. 9:244-253

Gutmicrobiota Skinmicrobiota

Page 6: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Ahypothesisforthestructureofdentalplaquebiofilms

Kolenbrander,etal.2010NatRevMicrobiolJabra-Rizk,etal.1999JClinMicrobiol

Page 7: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

MicrobialFluorescenceinsituHybridiza<on

Nature Reviews | Microbiology

Sample

Fixed cells arepermeabilized

Fixation

Ribosome

Fluorescently labelled oligonucleotides (probes)

Hybridized cells

Quantification

Fluorescencemicroscopy

Probe

Target (ribosomal RNA)

Hybridization

Washing

Amann, R. & B. Fuchs. 2008 Nat. Rev. Microbiol. 6:339-348

Page 8: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Spa<aldistribu<onofmicrobes:relevantscales

MowatandAgace.2014.Nat.Rev.Immunol.14:667-685. Grice and Segre. 2011. Nat. Rev. Microbiol. 9:244-253

Gutmicrobiota Skinmicrobiota

Page 9: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Spa<aldistribu<onofmicrobes:relevantscales

Gutmicrobiota Skinmicrobiota

hDp://irp.nih.gov/our-research/research-in-ac<on/the-microbiome-when-good-bugs-go-bad

Hairfollicle

bacteria

fungi

Propidiumiodide(Eukaryo<cDNA)Propidiumiodide(BacterialDNA)Calcafluorwhite(fungalcellwall)Unknownmatrixmaterial

Page 10: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

FluorescenceImaging:Highspecificity;Lowmul<plicity

Emission Spectra

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

475 525 575 625 675 725

Wavelength (nm)

Bodipy-Fl

Rhodamine Red-X

green filter

FISHontwomixturesofE.colilabeledwithtwodifferentfluorophores

red filter

Emission Spectra

0�

0.1�

0.2�

0.3�

0.4�

0.5�

0.6�

0.7�

0.8�

0.9�

1�

475� 525� 575� 625� 675� 725�

Wavelength (nm) �

AF-555�RhodamineRed-X �

red filter

Page 11: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Sequencingvs.Imaging

High LowHigh LowLow HighLow High

Breadth

Independenceofpriorknowledge

DynamicRange/Detec<onLimit

Abilitytoprovidespa<alinfo.

SequencingAssay ImagingAssay

Page 12: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

With8fluorophores,thereexist28uniquebinarycombina<ons

CLASI-FISHCombinatorialLabelingand

SpectralImaging-Fluorescenceinsitu

Hybridiza<on

Ribosome

Microbe

High mag. detail

Field of labeled

microbes

Red fluorophore

Green fluorophore

Blue fluorophore

Thepowerofcombina<ons Eachbacteriumislabeledwithexactly2fluors

CombinatorialLabeling

Page 13: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

0

0.2

0.4

0.6

0.8

1

498 548 598 648 698

Inte

nsity

(A.U

.)

Wavelength (nm)

Thisallowsfluorophoreswithhighlyoverlappingemissionspectratobedis<nguished—eveniftheyarepresentin

thesamepixelintheimage.

observed pixel spectrum

375 425 475 525 575 625 675 725 775Wavelength (nm)

known fluorophore spectra

FindBestFit

LinearUnmixing

y1y2yq

!

"

##

$

##

%

&

##

'

##

=

m11 mp1

m1q mpq

(

)

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Observedpixelspectrum

Knownfluorophorespectra

Abundanceofeachfluorophoreatthatpixel

Noise

Page 14: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

ImagingproofofprinciplewithE.coli

Page 15: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Establishing Biological Proof of Principle MIxtureofcellsof15laboratorygrownoraltaxa

Page 16: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Alexa fluor 488Alexa fluor 514Alexa fluor 555

Rhodamine Red XAlexa fluor 594Alexa fluor 647

Structural Analysis of a Natural Community: Human Dental Plaque

Imageofafieldofviewofsemi-dispersedhuman

dentalplaque

Selenomonas

Veillonella

Fusobacterium PorphyromonasPasteurellaceae CapnocytophagaNeisseriaceae Streptococcus

Prevotella

Gemella

Treponema Actinomyces

CampylobacterRothia

Leptotrichiaunknown

Page 17: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Raw spectral image merge

Taxon-assigned segmented image

Rhodamine Red X

Sele

Veil

Fuso PorpPast CapnNeis Strep

Prev

Geme

Trep Acti

CampRoth

Leptunkn

Raw spectral image merge

Taxon-assigned segmented image

Rhodamine Red X

Sele

Veil

Fuso PorpPast CapnNeis Strep

Prev

Geme

Trep Acti

CampRoth

Leptunkn

Structural Analysis of a Natural Community: Human Dental Plaque

Page 18: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Structural Analysis of a Natural Community: Human Dental Plaque

Model images of randomly placed cells

Selenomonas

Veillonella

Fusobacterium PorphyromonasPasteurellaceae CapnocytophagaNeisseriaceae Streptococcus

Prevotella

Gemella

Treponema Actinomyces

CampylobacterRothia

Leptotrichiaunknown

Observed image of plaque

Page 19: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Structural Analysis of a Natural Community: Human Dental Plaque

Streptococcus

Prevotella

Porphyromonas

Actinomyces

Fusobacterium

Rothia

Neisseriaceae

Gemella

Veillonella

Pasteurellaceae

Capnocytophaga

Campylobacter

Page 20: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Biogeographyofthehumanmicrobiomeatthemicronscale

MarkWelch,etal.2015.PNAS

Page 21: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Hedgehogstructureindentalplaque

MarkWelch,etal.2015.PNAS

Page 22: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Corncobstructuresattheborderofhedgehogstructures

MarkWelch,etal.2015.PNAS

Page 23: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Modelhypothesisofhedgehogstructure

tooth$anoxic$

CO2,$lactate,$acetate,$H2O2$

O2,$saliva,$sugars$

Crevicular$fluid$

v$

annulus$ perimeter$base$

Corynebacterium . ....Porphyromonas . ...Fusobacterium . .other$Streptococcus . . ....Neisseriaceae . ...Leptotrichia.Haemophilus/Aggr.. ....Capnocytophaga . ...Ac=nomyces.

MarkWelch,etal.2015.PNAS

Page 24: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Hedgehogstructuresasanecosystem

Gene<callydis<nctorganisms

occupyingnichesTrophicinterac<onsEnvironmentalinfluenceRoleofcell-to-cellcontact

MarkWelch,etal.2015.PNAS

Page 25: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Frameworkfororalmicrobiomefunc<onalstudy

KiDelmann,etal.2013.PLoSOne8:e47879

Ribosome

Microbe

High mag. detail

Field of labeled

microbes

Red fluorophore

Green fluorophore

Blue fluorophore

Microbialmetagenomics

SystemsImaging

Improvedmodelsof

microbialco-occurrence

Testablehypothesesregardingecosystemstructureandfunc<on

Duran-Pinedo,etal.2015.ISMEJ

Metatranscriptomics

daSilva,DorresteinandQuinn.2015PNAS

MetabolomicsKolenbrander,etal.2010.Nat.Rev.Microbiol

Invitrobiofioms

ExploratorySurveys LaboratoryExperiments

Steenackers,etal.2016.FEMSMicrobiolRev.

Computa<onalmodeling

Page 26: Demys&fying Medicine 29 March 2016...Dobell, C. Antony Van Leeuwenhoek and His “Little Animalcules. ” London. Constable & Co. 1932. Print. The Human Microbiome Project ca. 2016

Acknowledgements•  NICHD

–  JenniferLippincoDSchwartzLab

•  NHGRI–  JulieSegreLab

•  ForsythIns<tute– GaryBorisyLab

•  MarineBiologicalLab–  RudolfOldenbourg–  JessicaMarkWelch