Tr-KIT/c-KIT ratio in renal cell carcinoma

ERGÜN S., ALTAY D. U., GÜNEŞ S., Buyukalpelli R., KARAHAN S. C., TOMAK L., ...More

MOLECULAR BIOLOGY REPORTS, vol.46, no.5, pp.5287-5294, 2019 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 46 Issue: 5
  • Publication Date: 2019
  • Doi Number: 10.1007/s11033-019-04985-3
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.5287-5294
  • Karadeniz Technical University Affiliated: Yes


Truncated KIT (tr-KIT) is an alternative variant of c-KIT protein. Previous studies have clearly documented that c-KIT was associated with various oncogenic processes in RCC. However, the biological significance of tr-KIT in RCC development and progression remains unclear. So, it was aimed to investigate the possible association between RCC and tr-KIT which is thought to activate some oncogenic pathways. In this study, Kidney Cancer cDNA Array containing a total of 48 cDNA samples from the normal kidney tissues of 9 healthy subjects and kidney tumor tissues of 10 stage-1, 5 stage-2, 13 stage-3 and 11 stage-4 RCC patients was used for gene expression analysis. Real-Time PCR method was used to measure tr-KIT/c-KIT expression ratios. tr-KIT/c-KIT expression ratio was compared between tumor and normal samples, and statistically correlated with the clinical parameters of RCC patients. tr-KIT/c-KIT expression ratio was approximately 4-times higher in tumor samples than control ones (p = 0.001). Also, tr-KIT/c-KIT expression ratio was approximately two, three and six times higher in Fuhrman nuclear grades 2, 3 and 4 than normal, respectively (p = 0.009). Moreover, clear cell and papillary RCC has a significantly higher level of tr-KIT/c-KIT expression ratio than chromophobe RCC (p = 0.016). In the current study, it was stated for the first time that tr-KIT/c-KIT expression ratio was up-regulated in RCC tissues, and high tr-KIT/c-KIT expression ratio was correlated with more aggressive clinical features and poor patient prognosis. Our results suggest that increased tr-KIT/c-KIT expression ratio might be useful as a prognostic marker for RCC patients.