Science Webinar Series slides...miR-142-3p 0.4 miR-122 02 0.3 e Copies 02 0.3 e Copies 0.1 0.2...
Transcript of Science Webinar Series slides...miR-142-3p 0.4 miR-122 02 0.3 e Copies 02 0.3 e Copies 0.1 0.2...
![Page 1: Science Webinar Series slides...miR-142-3p 0.4 miR-122 02 0.3 e Copies 02 0.3 e Copies 0.1 0.2 Relativ 0.1 0.2 Relativ 0 Relative Size Vesicle Protein Relative Size Vesicle Protein](https://reader035.fdocuments.net/reader035/viewer/2022070923/5fbb755f301ce21615739cb8/html5/thumbnails/1.jpg)
Webinar SeriesWebinar SeriesWebinar SeriesWebinar SeriesScienceScienceScienceScienceDETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOODWhat miRNA Biomarkers Can Tell UsWhat miRNA Biomarkers Can Tell Us
30 May, 201230 May, 2012
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![Page 2: Science Webinar Series slides...miR-142-3p 0.4 miR-122 02 0.3 e Copies 02 0.3 e Copies 0.1 0.2 Relativ 0.1 0.2 Relativ 0 Relative Size Vesicle Protein Relative Size Vesicle Protein](https://reader035.fdocuments.net/reader035/viewer/2022070923/5fbb755f301ce21615739cb8/html5/thumbnails/2.jpg)
Webinar SeriesWebinar SeriesWebinar SeriesWebinar SeriesScienceScienceScienceScienceDETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOOD
Brought to you by the Science/AAAS Custom Publishing Office
DETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOODWhat miRNA Biomarkers Can Tell UsWhat miRNA Biomarkers Can Tell Us
30 May, 201230 May, 2012
Participating Experts:
Brought to you by the Science/AAAS Custom Publishing Office
Colin C. Pritchard M.D., Ph.D.University of WashingtonSeattle, WA
Monty Montano, Ph.D.Boston University School of MedicineBoston, MA
Adam Baker, Ph.D.ExiqonVedbaek, Denmark
Sponsored by:
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Circulating microRNA as Disease Biomarkers: A LaboratoryBiomarkers: A Laboratory
Medicine Perspective
Colin C. Pritchard MD, PhDUniversity of Washington
Department of Laboratory MedicineScience Webinar, May 30, 2012
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OutlineOutline
• microRNA as circulating biomarkers
• Laboratory medicine considerations:Sources of variation– Sources of variation
– State of microRNA in plasmaO i i d i li ti f di ifi it– Origin and implications for disease specificity
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Circulating microRNA Are Attractive Biomarkers
• Abundant in Blood
• Easy to Measure
• Highly Stable
• Disease Associations
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Over 200 Publications Since 2008 on Circulating miRNA
• Cancer• Prostate Breast Colon Lung Ovarian Leukemia• Prostate, Breast, Colon, Lung, Ovarian, Leukemia
Many other diseases• Many other diseases• Pregnancy, Diabetes, Heart Disease, etc.
• Sources of variation not well-studied
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OutlineOutline
• microRNA as circulating biomarkers
• Laboratory medicine considerations:Sources of variation– Sources of variation
– State of microRNA in plasmaO i i d i li ti f di ifi it– Origin and implications for disease specificity
![Page 8: Science Webinar Series slides...miR-142-3p 0.4 miR-122 02 0.3 e Copies 02 0.3 e Copies 0.1 0.2 Relativ 0.1 0.2 Relativ 0 Relative Size Vesicle Protein Relative Size Vesicle Protein](https://reader035.fdocuments.net/reader035/viewer/2022070923/5fbb755f301ce21615739cb8/html5/thumbnails/8.jpg)
Sources of VariationSources of Variation
• Analyticaly
• Biological
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Analytic VariationAnalytic Variation
• Pre-analytic
• Analytic
• Post-analytic
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InterferencesInterferences
Li i• Hemolysis
Hemolysis Lipemia
• Lipemia
• Drugs
A tib di• Antibodies
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Biological VariationBiological Variation
• Within individual– Diurnal
• Between individual– Age/GenderDiurnal
– Fasting/FedSick/Well
Age/Gender– Genetic/Ethnicity
Chronic disease– Sick/Well – Chronic disease
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OutlineOutline
• microRNA as circulating biomarkers
• Laboratory medicine considerations:Sources of variation– Sources of variation
– State of microRNA in plasmaO i i d i li ti f di ifi it– Origin and implications for disease specificity
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How is miRNA Stable in Plasma?How is miRNA Stable in Plasma?
• RNase-resistance hypotheses:• RNase-resistance hypotheses:– Intrinsically stable? (no)
– Protected in vesicles? (one model)
– Protected by other mechanisms?
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Two Populations of Circulating miRNAdetected by size-exclusion chromatography
Protein ComplexVesicle/Exosome0.4
miR-142-3p0.4
miR-122
0 2
0.3
e C
opie
s miR-142-3p
0 2
0.3miR-122
e C
opie
s0.1
0.2
Rel
ativ
e
0.1
0.2
Rel
ativ
e
0 0
Relative SizeVesicle Protein
Relative SizeVesicle Protein
Adapted from Arroyo et al. (2011) PNAS
Relative Size Relative Size
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Implications of Two Plasma States For CirculatingStates For Circulating miRNA Biomarkers?o a e s
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Specimen Processing and Vesicles
PlasmaPlateletsVesicles
mL
2x106
er P
er m
2x106
Platelet-Poor Plasma
PlateletsVesicles
Num
be
2x10
Par
ticle
PlateletsVesicles3x105
Platelet-Poor Plasma Filtered
P PlateletsVesicles
Filtered
Diameter (µm)
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OutlineOutline
• microRNA as circulating biomarkers
• Laboratory medicine considerations:Sources of variation– Sources of variation
– State of microRNA in plasmaO i i d i li ti f di ifi it– Origin and implications for disease specificity
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Where do plasma miRNA come from?Where do plasma miRNA come from?
C ll O i i R l ti C t ib tiCell Origin
Bl d C ll
Relative Contribution
??• Blood Cells ??
• Endothelium ??
• Other Tissues ??
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Plasma and Blood CellPlasma and Blood Cell miRNA Levels are Correlated
Plasma Blood Cells
higherRBC myeloid lymph
miRNA level
79 miRNA Biomarkers levelBiomarkers
Healthy Donors
lower
y
Adapted from Pritchard et al. (2012) Cancer Prev. Res.
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Plasma miRNA Correlate To Blood Counts
7.08.5miR-150miR-223
6 0
6.5 R=0.67
7 5
8.0 R=0.76
s/µl
pla
sma
s/µl
pla
sma
5.5
6.0
7.0
7.5
log 1
0co
pies
log 1
0co
pies
5.00.05 0.5 5
Lymphocyte Count (log10 thou/µl)
6.50.1 1 10
Neutrophil Count(log10 thou/µl)
Consecutive Clinical Plasma Samples
Adapted from Pritchard et al. (2012) Cancer Prev. Res.
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RBC-Derived miRNA are Affected by Hemolysis
• miR-16, miR-451 increased up to 50-fold
• Non-RBC miRNA not impacted – e.g. miR-122, miR-223, miR-150
McDonald et al. (2011) Clin. Chem.Pritchard et al (2012) Cancer Prev ResPritchard et al. (2012) Cancer Prev. Res.
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Summary/ConclusionsSummary/Conclusions• Circulating miRNA are promising as disease biomarkersg p g
• Little is known about analytic properties or biologic variationvariation
• miRNA are present in at least two states in plasmamiRNA are present in at least two states in plasma
• Plasma miRNA are likely released by blood cells
• Plasma miRNAs that are abundant in normal blood cells may have poor specificity as biomarkers because theymay have poor specificity as biomarkers because they are influenced by cell counts and hemolysis
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AcknowledgementsAcknowledgements
• FHCRC• FHCRC– Evan Kroh
M h T i– Muneesh Tewari– Jason Arroyo – Brent Wood– Heather Cheng
• UW– Liz Setran– Hye Son Yi
– John Tait– Don Gibson
• UH– Marc Goodman
– Deb BardenMarc Goodman
– Yeonju Kim
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Webinar SeriesWebinar SeriesWebinar SeriesWebinar SeriesScienceScienceScienceScienceDETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOOD
Brought to you by the Science/AAAS Custom Publishing Office
DETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOODWhat miRNA Biomarkers Can Tell UsWhat miRNA Biomarkers Can Tell Us
30 May, 201230 May, 2012
Participating Experts:
Brought to you by the Science/AAAS Custom Publishing Office
Colin C. Pritchard M.D., Ph.D.University of WashingtonSeattle, WA
Monty Montano, Ph.D.Boston University School of MedicineBoston, MA
Adam Baker, Ph.D.ExiqonVedbaek, Denmark
Sponsored by:
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AGING AND CHRONIC DISEASE: microRNA PROFILING in CENTENARIANS and HIV INFECTION
MONTY MONTANO, PhD
Principal Investigator
Section of Infectious Diseases, Boston University School of MedicineBoston OAIC Pepper Center for Aging
New England Centenarian Study
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
II. Can blood microRNA profiling be used to study aging in the extreme ?
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
II. Can blood microRNA profiling be used to study aging in the extreme ? Centenarians
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
II. Can blood microRNA profiling be used to study aging in the extreme ?
III Can blood microRNA profiling be used to studyIII. Can blood microRNA profiling be used to study chronic infection ?
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
II. Can blood microRNA profiling be used to study aging in the extreme ?
III Can blood microRNA profiling be used to studyIII. Can blood microRNA profiling be used to study chronic infection ? HIV infection
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
II. Can blood microRNA profiling be used to study aging in the extreme ?
III Can blood microRNA profiling be used to study
IV. Summary and implications for future studies
III. Can blood microRNA profiling be used to study chronic infection ?
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
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THE AGING BRAIN BASED ON i RNA EXPRESSIONTHE AGING BRAIN BASED ON microRNA EXPRESSION
AGE Adapted from Montano et al, Aging Res Rev 2010
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
II. Can blood microRNA profiling be used to study aging in the extreme ?
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i RNA PROCESSING AS A BIOMARKER OPPORTUNITY
pri-microRNA
microRNA PROCESSING AS A BIOMARKER OPPORTUNITY
pri microRNA
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i RNA PROCESSING AS A BIOMARKER OPPORTUNITY
pri-microRNA
microRNA PROCESSING AS A BIOMARKER OPPORTUNITY
pri microRNA
Biomarkers in Plasma/Serum ?
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CENT-1
CENT-2
CORRELATED microRNA EXPRESSION IN CENTENARIAN SAMPLES
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COMPARATIVE MICRORNA PROFILING OF CENTENARIANSCOMPARATIVE MICRORNA PROFILING OF CENTENARIANS
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COMPARATIVE MICRORNA PROFILING OF CENTENARIANSCOMPARATIVE MICRORNA PROFILING OF CENTENARIANS
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MICRORNA PROFILING OF CENTENARIANS by GENDER
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below average
MICRORNA PROFILING OF CENTENARIANS by GENDER
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
II. Can blood microRNA profiling be used to study aging in the extreme ?
III Can blood microRNA profiling be used to studyIII. Can blood microRNA profiling be used to study chronic infection ?
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HIV INFECTION AND PHENOCOPIES OF AGING
Frailty related phenotype
HIV INFECTION AND PHENOCOPIES OF AGING
Frailty related phenotype Desquilbet et al., 2007; Effros et al., 2008; Fried et al., 2001
Decline in bone and muscle massDecline in bone and muscle massBrown et al., 2009; Brown and Qaqish, 2006, Banerjee et al., 2012
Systemic inflammatory burden Systemic inflammatory burdenFinch and Morgan, 2007; Yarasheski et al., 2005
Immuosenescence elevated Immuosenescence elevatedEffros 2008, Appay 2007
Cognitive and brain function decline Cognitive and brain function declineAnces et al., 2009
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SIV+ SIV- SIV+ SIV-
COMPARATIVE MICRORNA PROFILING OF SIV INFECTION
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SIV+ SIV- SIV+ SIV-
COMPARATIVE MICRORNA PROFILING OF SIV INFECTION
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CLUSTERING BASED ON MICRORNAS AND SAMPLESCLUSTERING BASED ON MICRORNAS AND SAMPLES
Serum samplesSerum samples
roRN
As
roRN
As
mic
micr
SSIV‐
SIVSIV‐
Rescaled by row (microRNAs) Rescaled by columns (samples)
SIV+ SIV+
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CLUSTERING SERUM AND HIPPOCAMPUS i RNA EXPRESSIONCLUSTERING SERUM AND HIPPOCAMPUS microRNA EXPRESSION
Serum samples Brain samples
croR
NAs
croR
NAs
mic
mi
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CLUSTERING SERUM AND HIPPOCAMPUS i RNA EXPRESSIONCLUSTERING SERUM AND HIPPOCAMPUS microRNA EXPRESSION
Serum samples Brain samples
croR
NAs
croR
NAs
mic
mi
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QUESTIONS POSED IN THIS PRESENTATIONQUESTIONS POSED IN THIS PRESENTATION
I. Is there evidence for microRNAs in aging ?
II. Can blood microRNA profiling be used to study aging in the extreme ?
III Can blood microRNA profiling be used to study
IV. Summary and implications for future studies
III. Can blood microRNA profiling be used to study chronic infection ?
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SUMMARY d IMPLICATIONSSUMMARY and IMPLICATIONS
microRNAs may reflect underlying tissue/organ processes
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SUMMARY d IMPLICATIONSSUMMARY and IMPLICATIONS
microRNAs may reflect underlying tissue/organ processes
microRNA signatures may distinguish biologic from chronologic age
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SUMMARY d IMPLICATIONSSUMMARY and IMPLICATIONS
microRNAs may reflect underlying tissue/organ processes
microRNA signatures may distinguish biologic from chronologic age
microRNAs may be useful biomarkers for acute and chronic infection
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SUMMARY d IMPLICATIONSSUMMARY and IMPLICATIONS
microRNAs may reflect underlying tissue/organ processes
microRNA signatures may distinguish biologic from chronologic age
microRNAs may be useful biomarkers for acute and chronic infection
i RNA b f l i t t d th ti di ti microRNAs may be useful in targeted therapeutic-diagnostics
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ACKNOWLEDGEMENTSACKNOWLEDGEMENTS
AGING STUDIESPaola Sebastiani NECS, Boston UniversityTom Perls NECS, Boston UniversityKim Kafadar Long Boston UniversityKim Kafadar Long Boston UniversityClinton Baldwin Boston UniversityGreg Gibson Georgia Institute of TechnologyAdam Baker Exiqon, Inc.
HIV STUDIESDaniel Michaels Boston UniversitySusan Westmoreland NEPRC, Harvard Universityy
SUPPORTNIA NIAMSNIAMS NIAID
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Webinar SeriesWebinar SeriesWebinar SeriesWebinar SeriesScienceScienceScienceScienceDETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOOD
Brought to you by the Science/AAAS Custom Publishing Office
DETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOODWhat miRNA Biomarkers Can Tell UsWhat miRNA Biomarkers Can Tell Us
30 May, 201230 May, 2012
Participating Experts:
Brought to you by the Science/AAAS Custom Publishing Office
Colin C. Pritchard M.D., Ph.D.University of WashingtonSeattle, WA
Monty Montano, Ph.D.Boston University School of MedicineBoston, MA
Adam Baker, Ph.D.ExiqonVedbaek, Denmark
Sponsored by:
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Translating miRNA discovery in biofluids
Science WebinarMay 30th 2012, Adam Baker, PhD. [email protected]
g yinto robust biomarkers for disease,
toxicology or injury studies
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AgendaAgenda
• How to study microRNAs – introduction to LNA™
• Detection of microRNAs in clinical samples
• Diagnostic development using LNA™ UniversalDiagnostic development using LNA Universal
RT microRNA PCR
• Toxicology – new focused platform and servicesToxicology new focused platform and services
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Analyzing microRNAs –Analyzing microRNAs overcoming challenges by using LNA™
F t Ch ll LNA™ llFeature Challenge LNA™ allows
Short sequences (19-22 nt) Hard to achieve high sensitivity
Increased affinity
Highly homologous families (single base differences)
Hard to achieve sufficient specificity
Single nucleotide discrimination
Large variation in base composition (GC content varies between 5-95%)
Hard to design good multiplex assays
Tm normalization
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LNA™ enables high sensitivity and highLNA enables high sensitivity and high specificity in hybridization assays
• Increased Tm (Tm increases by 2 - 8ºC per base)
• Increased ∆Tm (larger difference between mismatch and perfect match)
• Tm normalization (adjust oligos to the same Tm)
K. Bondensgaard et al., Chem. Eur. J. 2000, 6, 2687M. Petersen et al., J. Am. Chem. Soc. 2002, 124, 5974
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Searching for microRNA biomarkers is like looking for a needle in a Haystack.
A cell contains total RNA level in plasmaA cell contains Approximately 10 to 30pg of total RNA
total RNA level in plasma is in the range 6-300
ng/ml.
0.3% of this is microRNA 5% of this microRNA
60
Jensen et al. BMC Genomics 2011, 12:435http://www.biomedcentral.com/1471-2164/12/435
Persat, Alexandre; Chivukula, Raghu R.; Mendell, Joshua T.;Santiago, Juan G.Journal Title: Analytical Chemistry Columbus 60http://www.biomedcentral.com/1471 2164/12/435Journal Title: Analytical Chemistry - ColumbusISSN: 0003-2700
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LNA™ microRNA PCR System:LNA microRNA PCR System: ideal for finding needles
Ad antagesAdvantages:● Universal RT → no bias,
no pre-amplification(no extra hay generated)
● LNA™ in two specificLNA in two specific primers → sensitivity and specificity(teases out the needle(teases out the needle from the hay)
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Extreme sensitivity allows microRNA PCR profilingExtreme sensitivity allows microRNA PCR profiling from clinical samples
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Accurate microRNA PCR profiling with simpleAccurate microRNA PCR profiling with simple workflow
● 20 µl plasma/serum or 150pg RNA input/ One RT reaction
● 96 or 384-well PCR including calibrators / controlscalibrators / controls
● QC / normalization and data analysis
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miRCURY LNA™ microRNA PCR SystemmiRCURY LNA microRNA PCR System- a solution for every project
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AgendaAgenda
• How to study microRNAs – introduction to LNA™
• Detection of microRNAs in clinical samples
• Diagnostic development using LNA™ UniversalDiagnostic development using LNA Universal
RT microRNA PCR
• Toxicology – new focused platform and servicesToxicology new focused platform and services
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LNA™ PCR assays show linearity at very low
Plasma or serum
concentrations as found in plasma and serum
● Serial dilution of a l f 647 th tipool of 647 synthetic
microRNAs
● Correlation between microRNA input and median Ct
● LNA™ PCR assays show near perfect plinearity even at very low concentrations
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We are experienced at overcoming the challenges ofWe are experienced at overcoming the challenges of microRNA qPCR normalization in serum/plasma
● Normalization adjusts for technical biases (RNA amount, quality etc)j ( q y )● No housekeeping genes are stably expressed in all situations● U6 and 5S are not applicable to serum/plasma samples● With qPCR panels, no prior assumptions about housekeeping genesWith qPCR panels, no prior assumptions about housekeeping genes● Select a normalization method appropriate for the dataset
Raw data values Quantile normalizationMean centered normalization
Mean centered (top 50 expressed)( p p )
normalization
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Unique QC possibilities with our Normal reference range – Human serum1400+ human samples with over 1 million PCR data points make up the reference range
DynamicWindowOf miRNAExpressionExpressionIn serum
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AgendaAgenda
• How to study microRNAs – introduction to LNA™
• Detection of microRNAs in clinical samples
• Diagnostic development using LNA™ UniversalDiagnostic development using LNA Universal
RT microRNA PCR
• Toxicology – new focused platform and servicesToxicology new focused platform and services
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Early Detection of CRC in blood plasmaEarly Detection of CRC in blood plasma addresses large unmet need
Colorectal cancer
● The second most important cancer in terms of deaths in the western world
● Estimated deaths in 2009 in the USA was 49,920
● The addressable screening market is 3.75 Billion USD (or 300 million people per year)
Stage 5 yr relative Treatmentg ysurvival
0-I 93% Surgery
II 80% Surgery
III 58% Surgery/adjuvantchemotherapy
IV 6.9% Chemotherapy
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Exiqon’s discovery process and PCR platformExiqon s discovery process and PCR platform are compatible with clinical procedures
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Development of microRNA Early Detection
DISCOVERY PHASE VALIDATION PHASE
Development of microRNA Early Detection Test of CRC in blood plasma
• 50 controls• 50 CRC patients
• Multiple QC check
• Data analysis• Quality control
• 325 samples• Focused
Genome wide screening
Normalization, QC, processing
Bioinformatics, data analysis
Candidate miRNA discovery screen
• Defined miRNA signature
Validation SetmiRNA signature
50 CRC patients• 742 miRNA
screen• Genome wide
check• Data flagging• Normalization
Quality control• ROC curve• miRNA selection
Focused Serum/Plasma panel
• Multiple controls
signature• Pick & Mix panel• Multiple controls
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microRNA Biomarker discovery workflow
DISCOVERY PHASE VALIDATION PHASE
microRNA Biomarker discovery workflow and panel selection options
Genome wide screening
Normalization, QC, processing
Bioinformatics, data analysis
Candidate miRNA discovery screen
Validation SetmiRNA signature
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AgendaAgenda
• How to study microRNAs – introduction to LNA™
• Detection of microRNAs in clinical samples
• Diagnostic development using LNA™ UniversalDiagnostic development using LNA Universal
RT microRNA PCR
• Toxicology – new focused platform and servicesToxicology new focused platform and services
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Focus microRNA PCR PanelsFocus microRNA PCR Panels Available from the Pick & Mix configurator allows for full customization to improve sample analysis
● Focus panels are available for customization through the Pick&Mixfi tconfigurator:
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New Focused PCR developmentNew Focused PCR development
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AcknowledgementsAcknowledgements
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Webinar SeriesWebinar SeriesWebinar SeriesWebinar SeriesScienceScienceScienceScienceDETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOOD
Brought to you by the Science/AAAS Custom Publishing Office
DETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOODWhat miRNA Biomarkers Can Tell UsWhat miRNA Biomarkers Can Tell Us
30 May, 201230 May, 2012
Participating Experts:
Brought to you by the Science/AAAS Custom Publishing Office
Colin C. Pritchard M.D., Ph.D.University of WashingtonSeattle, WA
To submit your questionsMonty Montano, Ph.D.Boston University School of MedicineBoston, MA
To submit your questions, type them into the text box
and click .
Adam Baker, Ph.D.ExiqonVedbaek, Denmark
Sponsored by:
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Webinar SeriesWebinar SeriesWebinar SeriesWebinar SeriesScienceScienceScienceScienceDETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOOD
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DETECTING DISEASE IN BLOODDETECTING DISEASE IN BLOODWhat miRNA Biomarkers Can Tell UsWhat miRNA Biomarkers Can Tell Us
30 May, 201230 May, 2012
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