Dennis Wall is an Associate Professor of Pediatrics at the Stanford University School of Medicine.
The Wall Lab uses machine learning and systems biology to develop clinical solutions for the detection and treatment of autism and other complex human diseases. The lab’s research falls into three categories three general categories: (1) Translating the thinking of systems biology to the field of autism genetics with the intent to develop effective early-stage diagnostics and targets for therapeutic intervention. The work involves the generation and analysis of genomic and phenotypic databases using computational tools of systems biology, machine learning and network inference.(2) Efforts to understand and characterize the clinical significance and utility of human genetic variation. This work involves clinical-grade annotation of human genetic variation, estimating the rates of both true and false positives in present day genetic testing and their likely impacts on the practice of personalized care, the construction of an authoritative knowledgebase for clinical decision support, and efforts in educating present and future doctors on the potentials of genomics in individualized healthcare.(3) Redefining human diseases through computational and comparative network analysis. The work involves the integration and analysis of transcriptomic, genomic and bibliomic data to network all known human diseases. Deliverables include revealing disease connections, properly reshaping blurred boundaries of classification, and opportunities for drug treatment repositioning.
Dr. Wall received his doctorate in Integrative Biology from the University of California, Berkeley, where he pioneered the use of fast evolving gene sequences to trace population-scale diversification across islands. Then, with a postdoctoral fellowship award from the National Science Foundation, he went on to Stanford University to address broader questions in systems biology and computational genomics, work that resulted in comprehensive functional models for both protein mutation and protein interaction.
The incidence of autism has increased dramatically over recent years, making this mental disorder one of the greatest public health challenges of our time. It has a strong genetic component, but molecular pathology remains unclear despite deep sequencing efforts. Thus, the dominant methods for diagnosis rely on behavioral characteristics, however these take hours to administer and often do not reach children until they have aged past key windows of development. In this talk, I will describe recent efforts in my lab to discover both genetic and behavioral markers that enable rapid, early and accurate detection of autism. For the former, I will describe how we have compared the network of autism gene candidates to the complete genetic systems of behaviorally related disorders including ADHD to target novel gene candidates and improve our understanding of the genetic system of autism, and how this work has identified a potentially important role for the immune system. For the latter, I will describe how we have used machine-learning techniques to study over 5,000 autism cases and some of the most commonly used behavioral instruments for autism detection to quicken and mobilize the detection of the core features of autism. Deploying an alternative decision tree-learning algorithm, we identified a procedure that could reduce the total complexity by 93% without loss of accuracy and that can be administered out of the clinic and via mobile media. Such an abbreviated diagnostic instrument could have significant impact on the timeframe of diagnosis, making it possible for more children to receive diagnosis and care early in their development.
Wednesday Feb 12, 2014
12:45 PM Lunch
1:15 PM Seminar
Location: Clark Center S360
Host: Dmitri Petrov