1) Unknown Genes
2) Cancer Diagnosis
Unknown Genes - "guilt by association"
Can we use DNA microarrays to predict cellular roles for "unknown
genes"?
Guilt by association means if 3 out of four genes are known
and the unknown one appears to be coordinately regulated, then perhaps the
unknown gene has a related function.
Two examples from DeRisi et al. diauxic shift paper:
Seven Repressed Genes
Seven Induced Genes
Potential for Improved Cancer Treatment with DNA Microarrays
Diffuse Large B-Cell Lymphoma (DLBCL)
- 25,000 new cases reported each year in the United States
- Fewer than half of DLBCL patients benefit from standard
chemotherapy treatment.
69 tissue samples and 17,000 genes
Recluster DLBCL samples using Germinal Center and Activated B-cell genes
Correlation of DNA microarray analysis and clinical outcomes of patients
(all figures with
permission of Pat Brown)