Tomas Radivoyevitch, PhD Assistant Professor Epidemiology and Biostatistics Case Western Reserve University Website: Integrative Cancer Biology

Emphasis is on the stochastic component of the model. Is there something in the black box or are the input wires disconnected from the output wires such that only thermal noise is being measured? Do we have enough data? Model components: (Deterministic = signal) + (Stochastic = noise) Statistics Engineering Emphasis is on the deterministic component of the model We already know what is in the box, since we built it. The goal is to understand it well enough to be able to control it. Increasing amounts of data/knowledge Times are Changing

ICB Goals Ultimate Goal: individualized, state feedback based clinical trials

Metabolism of dNTPs + Analogs Metabolism of DNA + Drug-DNA Damage Driven or S-phase Driven dNTP demand is either Focus on cancers caused by DNA repair system failures DNA repair Salvage De novo Focus on nucleoside analogs CASE ICBP Problem Statement For Example:

UDP CDP GDP ADP dTTP dCTP dGTP dATP DNA dUMP ATP De Novo dNTP Synthesis

Data from Barry Cooperman’s group Enzyme Activity Profiles

Radivoyevitch T, Kashlan OB, Cooperman BS: Rational Polynomial Representation of Ribonucleotide Reductase Activity. BMC Biochemistry 2005, 6:8. Rational Polynomial Reaction Surface

Metabolism of dNTPs + Analogs Metabolism of DNA + Drug-DNA Damage Driven or S-phase Driven dNTP demand is either Focus on cancers caused by DNA repair system failures DNA repair Salvage De novo Focus on nucleoside analogs Case ICBP Problem Statement

ICB Model-Based Approaches to Therapeutic Gain Direct Approach Direct Approach –IUdR metabolism applied to MMR - cancers Cell death surrogate Anti-cancer input agents Treatment failure risk-state-transfer Approach Treatment failure risk-state-transfer Approach –TEL-AML1 patients as guides for BCR-ABL patients Cause of cancer Determinant of treatment failure Anti-cancer input agents Model contents

Risk State Transfer T: TEL-AML1 with HR T: TEL-AML1 with HR t : TEL-AML1 with CCR t : TEL-AML1 with CCR t : other outcome t : other outcome B: BCR-ABL with CCR B: BCR-ABL with CCR b: BCR-ABL with HR b: BCR-ABL with HR b: censored, missing, or other outcome b: censored, missing, or other outcome

Model Sharing & Use Systems Biology Markup Language (SBML) Systems Biology Markup Language (SBML) –A standard for representing biochemical systems R –Free statistics-oriented computational environment Bioconductor Bioconductor –R packages primarily for DNA microarray data analyses SBMLR SBMLR –An SBML-R interface and model analysis tool

library(SBMLR);library(odesolve) curto=readSBML(file.path(.path.package("SBMLR"), "models/curto.xml")) out1=simulate(curto,seq(-20,0,1)) curto$species$PRPP$ic=50 out2=simulate(curto,0:70) outs=data.frame(rbind(out1,out2));attach(outs) par(mfrow=c(2,1),cex.lab=1.5) plot(time,IMP,type="l",xlab="minutes",ylab="IMP (uM)") plot(time,HX,type="l",xlab="minutes",ylab="HX (uM)") SBMLR

Summary The Present The Future

Acknowledgements Comprehensive Cancer Center of Case Western Reserve University and University Hospitals of Cleveland (P30 CA43703) Comprehensive Cancer Center of Case Western Reserve University and University Hospitals of Cleveland (P30 CA43703) American Cancer Society (IRG ) American Cancer Society (IRG ) Case Integrative Cancer Biology Program (P20 CA ) Case Integrative Cancer Biology Program (P20 CA ) NIH Career Development Award (1K25 CA A1) NIH Career Development Award (1K25 CA A1) Thank you Thank you