Gastric cancer is the abnormal growth of stomach cells. The symptoms of this disease include difficulty in swallowing, heartburn, stomach pain, indigestion, nausea, vomiting, and blood in the stool. Gastric cancer is a multifactorial and genetic disease, and many genes and factors are involved in it. DCC and CDH1 are the genes silenced by hypermethylation in gastric cancer and play an influential role in suppressing gastric cancer tumors. The aim of this study was bioinformatics analysis at the genome and proteome level and evaluation and comparison of the expression of DCC and CDH1 genes in different human body tissues. The results of this study showed that the CDH1 gene is more expressed in the thyroid gland and Parathyroid gland and the DCC gene is more expressed in the testis, hippocampal formation, basal ganglia, midbrain, cerebral cortex, and hypothalamus. The expression analysis of these genes showed that both genes generally are more active in glands and have little expression in other body organs. Cellular analysis of DCC and CDH1 genes by antibodies that bind to the proteins of the target genes showed that both genes are active in the Golgi apparatus, with the difference that the DCC gene is more present in the nucleus and the CDH1 gene is more present in the plasma membrane. The expression level of the CDH1 gene is relatively higher than that of the DCC gene. Also, phenotypic studies of the DCC gene showed that this gene is related to colorectal cancer, and it was found that the CDH1 gene is effective in Blepharocheilodontic syndrome 1. Finally, considering the role of CDH1 and DCC genes as tumor suppressor genes, these items can be used for targeted treatments in gastric cancer.
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