Charles L. Kooperberg
Ph.D., University of California, Berkeley, Statistics, 1991.
M.A., University of California, Berkeley, Statistics, 1988.
B.Sc., Delft University of Technology, Mathematics, 1985.
Adaptive function estimation for genomic data .
My main research area is nonparametric function estimation and the analysis of high dimensional data, in particular as applied to genomic and proteomics data.
The publication of the sequence of the human genome and breakthroughs in the high throughput technologies for single nucleotide polymorphism (SNP) genotyping, gene expression, and protein measurements have offered new opportunities for the study of genome complexity. New technologies are generating large amounts of high-dimensional data at an astounding speed. Relative to the high dimension of the data the number of independent samples is often rather small, either because the techniques are too expensive, or because it is hard to obtain enough independent biological samples. Clearly, the development of new statistical techniques is required for the extraction of useful biological information from such data.
Adaptive regression methods, which combine variable selection and nonlinear modeling, are well suited for many of these problems. In my research I try to develop and enhance these methods to address the practical problems that arise directly from several collaborative projects. In particular I focus on association studies with SNP, microarray, and proteomics data.
For SNP association studies we have developed Logic Regression. Logic Regression is a methodology for regression problems in which all (most) of the predictors are binary, and in which our interest is to discover potential high order interactions between these predictors. In Logic Regression new predictors that are logic (Boolean) combinations of the binary predictors are constructed.
There are numerous situations in which data is generated by some (unknown) mechanism, where interest lies in estimating a function that is related to a model for the data. In the polynomial spline approach we model such a function to be in a linear space of smooth piecewise polynomials (splines). In practice we often use stepwise algorithms to determine this space adaptively. For example, in the popular proportional hazards model the dependence of survival times on the covariates is modeled fully parametrically. Hazard regression (HARE) employs an adaptive algorithm based on splines to model the conditional log-hazard function. It does not assume a proportional hazards model, but it contains these models as a special subclass. I am both interested in developing similar nonparametric methodologies for other function estimation problems, as in the extension of existing methods to applications of these methodologies.
In addition, I am actively involved in the activities of the Clinical Coordinating Center of the Women's Health Initiative. This is a 15-year program that involves a clinical trial of 67,500 postmenopausal women and an observational study of an additional 100,000 women. The primary outcomes that are studied are breast cancer, colorectal cancer, coronary heart disease and hip fractures. Within the coordinating center I am primarily involved in the outcomes procedures and the periodic reporting to the Data Safety and Monitoring Board.
1999-2003, Affiliate Associate Professor, University of Washington, School of Public Health and Community Medicine, Biostatistics
1997-2002, Associate Member, Fred Hutchinson Cancer Research Center, Public Health Sciences Division, Biostatistics
1991-1997, Assistant Professor, University of Washington, College of Arts and Sciences, Statistics
Imputation of coding variants in African Americans: better performance using data from the exome sequencing project.. Bioinformatics (Oxford, England).. 2013.
Menopausal hormone therapy and health outcomes during the intervention and extended poststopping phases of the Women's Health Initiative randomized trials.. JAMA : the journal of the American Medical Association. 310(13):1353-68.. 2013.
Genome-wide Characterization of Shared and Distinct Genetic Components that Influence Blood Lipid Levels in Ethnically Diverse Human Populations.. American journal of human genetics.. 2013.
Genome-wide association study of age at menarche in African-American women.. Human molecular genetics.. 2013.
Polymorphisms in genes related to one-carbon metabolism are not related to pancreatic cancer in PanScan and PanC4.. Cancer causes & control : CCC. 24(3):595-602.. 2013.
A genome-wide association study of breast cancer in women of African ancestry.. Human genetics. 132(1):39-48.. 2013.
Exome sequencing and directed clinical phenotyping diagnose cholesterol ester storage disease presenting as autosomal recessive hypercholesterolemia.. Arteriosclerosis, thrombosis, and vascular biology. 33(12):2909-14.. 2013.
No evidence of interaction between known lipid-associated genetic variants and smoking in the multi-ethnic PAGE population.. Human genetics. 132(12):1427-31.. 2013.
Genome-wide association of body fat distribution in African ancestry populations suggests new loci.. PLoS genetics. 9(8):e1003681.. 2013.
A meta-analysis identifies new loci associated with body mass index in individuals of African ancestry.. Nature genetics. 45(6):690-6.. 2013.
Association of DXA-derived Bone Mineral Density and Fat Mass With African Ancestry.. The Journal of clinical endocrinology and metabolism. 98(4):E713-7.. 2013.
Genome-wide Association and Population Genetic Analysis of C-Reactive Protein in African American and Hispanic American Women.. American journal of human genetics. 91(3):502-12.. 2012.
Multivariate detection of gene-gene interactions.. Genetic epidemiology. 36(6):622-30.. 2012.
Diabetes and risk of pancreatic cancer: a pooled analysis from the pancreatic cancer cohort consortium.. Cancer causes & control : CCC.. 2012.