In this book, we study about the genes involved in oral carcinogenesis and its use in gene therapy. Carcinogenesis is a complex, multi-step process in which genetic events within signal transduction pathways governing normal cellular physiology are quantitatively altered. The genetic basis of cancer is now well-established. Under normal conditions, these tightly controlled excitatory and inhibitory pathways regulate oral keratinocyte biology. Basic cellular functions under these controls include cell division, differentiation, senescence and adhesion. Genetic factors such as oncogenes, Tumour...