1st International Conference of Genomics and Bioinformatics (ICGB), Aydın, Turkey, 1 - 04 November 2018, pp.30
Investigation of cancer gene expression profile in context of tissue-specific genes hasn’t been studied
in detail. In this study, we aim to understand genetic alteration of tumors in context of tissue-specific genes.
Specific genes for various healthy tissues were determined using extended tau which is a robust and rigorous
method generated in our previous study. Tissue-specific genes were joined with breast cancer expression data.
Utilizing a statistical approach, we identified genes which are specific to a tissue other than breast but having high
expression in cancerous breast, not in normal breast. We pinpointed 34 genes specifically expressed in breast
cancer, although they are specific to ovary, placenta or testis. This unsuspected phenomenon was also observed
in different cancers.
Some of cancer-testis genes, MAGE, TEX and PAGE family members, have been confirmed by our study and we
observed additional cancer-testis genes such as CT83, SPANX family members. Several placenta and testis-
specific genes are highly expressed in only breast cancer, while some of them are also expressed in lung and liver
Consequently, detected genes have potential to be adopted as early diagnostic markers and immunogenic
therapeutics. Germline and placental genes should be studied in detail to reveal cancer cells behaviors.
Keywords: Data Analysis, Expression Profile, Tissue-Specific Gene, Cancer-Testis Gene.