MIT-OCW Health Sciences & Technology 508/510 Harvard Biophysics 101 EconomicsEconomics, Public Policy, Business, Health PolicyPublic PolicyBusinessHealth.

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MIT-OCW Health Sciences & Technology 508/510 Harvard Biophysics 101 EconomicsEconomics, Public Policy, Business, Health PolicyPublic PolicyBusinessHealth Policy For more info see: 10 AM Tue 11-Oct 2005 Fairchild 177 week 4 of 14 Genomics, Computing, Economics & Society

Class outline (1) Topic priorities for homework since last class (2) Quantitative exercises: psycho-statistics, combinatorials, random/compression, exponential/logistic, bits, association & multi- hypotheses (3) Project level presentation & discussion (4) Sub-project reports & discussion: Personalized Medicine & Energy Metabolism (5) Discuss communication/presentation tools (6) Topic priorities for homework for next class

Common Disease – Common Variant Theory. How common? ApoE allele  4 : Alzheimer’s dementia, & hypercholesterolemia 20% in humans, >97% in chimps>97% in chimps HbS 17% & G6PD 40% in a Saudi sample CCR5  32 : resistance to HIV 9% in caucasians

SNPs & Covariance in proteins e4 20% ApoE e3 80% Ancestral = Arg 112 Thr 61

One form of HIV-1 Resistance

Association test for CCR-5 & HIV resistance Samson et al. Nature :722-5Nature :722-5

But what if we test more than one locus? The future of genetic studies of complex human diseases. RefRef (Note above graphs are active spreadsheets -- just click) GRR = Genotypic relative risk

How many "new" mutations? G= generations of exponential population growth = 5000 N'= population size = 6 x 10 9 now; N= 10 4 pre-G m= mutation rate per bp per generation = to (ref)(ref) L= diploid genome = 6 x 10 9 bp e kG = N'/N; so k= Av # new mutations <   Le kt m = 4 x 10 3 to 4 x 10 4 per genome t=1 to 5000 Take home: "High genomic deleterious mutation rates in hominids" accumulate over 5000 generations & confound linkage methods And common (causative) allele assumptions.

Class outline (1) Topic priorities for homework since last class (2) Quantitative exercise (3) Project level presentation & discussion (4) Sub-project reports & discussion (5) Discuss communication/presentation tools (6) Topic priorities, homework for next class