Document Type : Research Articles
Department of Clinical Genetics, National Institute of Genetic Engineering and Biotechnology (NIGEB),Tehran, Iran.
Colorectal Cancer Research Center, Hazrat Rasool Hospital, Iran University of Medical Sciences and Health Care Services, Tehran, Iran.
Background and objectives: Colorectal cancer (CRC) is the most common gastrointestinal cancer and the second
leading cause of cancer death in women in the world. Cancer-Testis Antigens (CTAs) are a group of tumor-associated
proteins which typically are expressed in normal reproductive cells of men, but their expression in normal somatic cells
is silenced. CTAs, due to their limited expression pattern, are considered as promising targets for cancer diagnosis and
immuno-therapy. Methods: Expression of AKAP4, SPAG9 and CTAG1B genes from the CTAs family was studied
in both tumor and normal tissues of 62 Iranian CRC patients by RT-PCR with the aim of finding biomarkers for early
detection and anticipated progression. Statistical analysis was performed SPSS software V22.0 to assess the significance
of any associations. Results: Elevated expression of SPAG9 and AKAP4 genes was observed in approximately 66%
and 44% of tumours, respectively, as compared to adjacent non-cancerous tissues. While a significant association was
found between AKAP4 gene expression and metastasis (P-value: 0.045), expression of the CTAG1B (NY-ESO-1) gene
was not observed in our cases. Conclusion: AKAP4 and SPAG9 genes may find use as diagnostic biomarkers for CRC
and AKAP4 may play an important role in progression to metastasis.