Project 2

Genesys Research Institute, Inc., Boston MA

Investigators

Linked publications, trials & patents

Abstract

Our mathemafical/computafional Preliminary Studies emphasize the analysis of experimental data collected by our mulfidisciplinary team at Center of Cancer Systems Biology in conjuncfion with human data from the literature, to construct a predicfive model of dynamic steps in carcinogenesis ¿ Initiation consists of one or more comparatively rapid genomic or epigenetic alterations; the alterations produce cell clones that may become dysplasfic or hyperplastic and are at risk for being transformed. ¿ Promotion, according to one common view, involves the proliferation of initiated, and thus premalignant, cells. Promofion may take many years and the cell lineages may incur addifional alterations. ¿ (Malignant) transformation is a further genomic or epigenefic alterafion in an inifiated/promoted lineage. Somefimes, transformation is considered to be one point mutafion in a key gene, but other models consider larger scale DNA changes (e.g. deletions, duplicafions, translocafions and inversions, aneuploidy, or horizontal transfer) and/or consider mulfiple alterafions instead of just one alterafion. ¿ Progression occurs as a malignant cell lineage evolves in interacfion with its microenvironment, often becoming increasingly malignant and invasive. Genomic instability is a common feature. Many computational models implement all or part of this fimeline, often with addifional steps (reviewed, e.g., in [Cox & Huber 2007; Little et al. 2008a]). One basic implementafion is the classic two-stage clonal expansion (TSCE) model [Moolgavkar & Luebeck 2003], which emphasizes probabilisfic promotion. Two-stage refers to initiation to pre-malignancy (stage 1) and transformation to malignancy (stage 2).