Integrins and Melanoma Progression
Tumor (or neoplastic) progression is one of the crucial events in the development of cancer. It is defined as the acquisition of permanent, irreversible, and qualitative changes of one or more characteristics in a neoplasm and its precursor lesions (Nowell 1986). Confronted with selective pressure imposed by host defense and/or therapy, tumor progression favors relentless emergence of new subpopulations with enhanced growth and metastatic capacities, creating tumor heterogeneity (Fidler 1988). Tumor heterogeneity is based on both genetic and epigenetic changes and on differences in development and maturation of the tumor cell population. A better understanding of the pathogenesis of neoplastic progression is likely to provide new clues for diagnosis and therapy aimed at the aggressive tumor cell populations.
KeywordsAdenocarcinoma Transportation Oncol Sarcoma Fibril
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