The most challenging task in colorectal cancer research nowadays is to understand the development of acquired resistance to anti-EGFR drugs. The key reason for this problem is the KRAS mutations appearance after the treatment with monoclonal antibodies (moAb). Here we present a mathematical model for the analysis of KRAS mutations behavior in colorectal cancer with respect to moAb treatments. To evaluate the drug performance we have developed equations for two types of tumors cells, KRAS mutated and KRAS wild-type. Both tumor cell populations were treated with a combination of moAb and chemotherapy drugs. It was observed that even the minimal initial concentration of KRAS mutation before the treatment has the ability to make the tumor refractory to the treatment. Minor population of KRAS mutations has strong influence on large number of wild-type cells as well rendering them resistant to chemotherapy. Patient׳s immune responses are specifically taken into considerations and it is found that, in case of KRAS mutations, the immune strength does not affect medication efficacy. Finally, cetuximab (moAb) and irinotecan (chemotherapy) drugs are analyzed as first-line treatment of colorectal cancer with few KRAS mutated cells. Results show that this combined treatment could be only effective for patients with high immune strengths and it should not be recommended as first-line therapy for patients with moderate immune strengths or weak immune systems because of a potential risk of relapse, with KRAS mutant cells acquired resistance involved with them.

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Thyroid cancer is one of the major cancers around the world. In this study the whole thyroid genome is systematically scanned in order to hit those molecular targets which are highly associated with thyroid cancer. To achieve this goal bioinformatics methodologies are combined. These include the high throughput microarray analysis combined with Serial analysis of gene expression. The results obtained revealed Glycoprotein M6A (GPM6A) as a novel associated gene marker. It belongs to the glycoprotein's family which plays a major role in cell migration and also known as the major contributors in tumor formation. Moreover the biological pathway of GPM6A is not yet been defined. In this study by assessing the whole biological mechanism the pathway is also inferred .This new drug target will help the biologists in finding the early diagnosis and better treatment for the thyroid cancer patients. Journal of

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