Identification of genetic links of thyroid cancer to the neurodegenerative and chronic diseases progression : insights from systems biology approach

![CDATA[Patients with thyroid cancer (TC) which exhibits signicant co- morbidity with other diseases, and are at high risk of death. TC has a strong association with the following neurodegenerative and Chronic diseases: Parkin- sons disease (PD), Osteoporosis (OP), Chronic kidney disease (CKD), chronic heart failure (CHF), Type 1 diabetes (T1D) and Type 2 diabetes (T2D). In this study, we use a Systems Biology Approach to explore the comorbidity of TC with above mentioned diseases in order to improve the quality and life expectancy of TC patients. In this study, we used and analyzed microarray datasets related to the TC, PD, OP, CKD, CHF, T1D and T2D diseases, to identify the association of TC with the above-mentioned diseases. We built a relationship network between TC and other diseases, and identied impli- cated gene expression ontology, dysregulated pathways, and involved protein- protein interaction network (PPI) by using multilayer network topology and neighborhood-based benchmarking methods. We obtained 598 dierentially ex- pressed genes (DEG) (133 were down-regulated and 465 were up-regulated) with P <= :05 and jlogFCj >= 1 for TC. We observed that TC shares 16, 12, 82, 19, 5 and 5 DEGs with PD, OP, CKD, CHF, T1D and T2D, respectively. We leveraged various network based methodologies to analyze and investigate the genetic relationship of TC with PD, OP, CKD, CHF, T1D and T2D dis- eases. We found that CKD is strongly associated with TC in terms of common genes and also identied hub genes and important pathways which could be helpful for further studies to identify new biomarkers and pathological pro- cesses underlying TC.]]