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Tetearing, A. N.

Publications and source records attributed to Tetearing, A. N..

2 recordsLinked to original sources

Approximation of the age distribution of cancer incidence using a mutational model

The approximation of the age distributions of cancers was carried out using a complex mutational model presented in our work [1]. Datasets from the American National Cancer Institute (SEER program) were used. We approximated the datasets for the age distributions of lung, stomach, colon and breast cancer in women; cancer of the lung, stomach, colon and prostate in men. The average number of mutations (required for cancer formation) averaged over the four types of cancer is 5 mutations per cell in women and in men. The average (over the four types of cancer) mutation rate is estimated as 1.0 {middle dot} 10 -1 mutations per year per cell for women and 3.8 {middle dot} 10 -1 mutations per year per cell for men. This article is a continuation of work [1].

cancer biology

Cancer models and statistical analysis of age distribution of cancers

In this paper, mathematical mutational models of the age distribution of cancers are obtained. These are two models - a simple model and a complex model, which takes into account the growth of the cell population and the transmission of mutations to daughter cells. Using the resulting formulas, we approximated real age-specific cancer incidence datasets in women (colon, lung, mammary, stomach) and men (colon, lung, prostate, stomach). We estimated parameters such as the average number of mutations (per cell per unit of time) and number of mutations required for cancer to occur. The number of mutations averaged (over four types of cancer) required for cancer to occur is 5.5 (mutations per cell for women) and 6.25 (mutations per cell for men) for the complex mutational model. As an alternative to mutational models, we also consider the model of delayed carcinogenic event.

cancer biology