Published online by Cambridge University Press: 31 July 2009
Introduction
The most important event in science in this decade has been the publication of the sequence of the human genome by two independent initiatives (Lander et al., 2001; Venter et al., 2001). However, the sequence of the human genome and other species can contribute to our understanding of human biology only if it can be linked with functional information on the roles of encoded proteins. A major goal of science in the “post-genomic era” is to unravel the functions of the many genes discovered by sequencing. Although sequence- or structure-based comparisons are enabling the generation of hypotheses on the biochemical functions of many gene products, determining the role of a large set of genes is still a challenge.
Recently, RNA interference (RNAi) technology has been developed for the down-regulation of selected gene expression in mammalian cells. This technology offers a rapid way to gain insight to loss-of-function phenotypes associated with specific genes. Furthermore, the combination of RNAi with other functional genomic approaches such as gene expression profiling is providing a powerful tool in our efforts to establish the function of genes in the pathogenesis of many diseases. In this chapter, we will summarize the contributions that RNAi and microarrays have had in cancer research, particularly in understanding the mechanisms and pathogenesis of malignant mesothelioma, a devastating tumor of the serosal cells lining the pleural, peritoneal and pericardial cavities (Mossman and Gee, 1989).
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