Pancreatic cancer is a major malignant tumor without an effective treatment. KRAS mutations occur in 90% of the pancreatic cancer patients and are a major obstacle for treatment of pancreatic cancer. Pancreatic cancer patients have been treated with limited chemotherapeutic agents such as gemcitabine. However, patients often develop resistance to gemcitabine that is attributed to KRAS mutations. Gemcitabine treatment activates both the Wnt/β-catenin and RAS/ERK pathways. These signaling pathways are also activated in the gemcitabine-resistant pancreatic cancer cell lines, suggesting that they play an important role in gemcitabine resistance in pancreatic cancer. The gemcitabine-resistant cell lines show enhanced migratory and invasive capabilities than their parental lines. Therefore, we investigated the effects of a small molecule, KYA1797K that degrades both β-catenin and RAS, on pancreatic cancer. KYA1797K decreased the expression level of both β-catenin and KRAS in pancreatic cancer cell lines expressing either wild-type or mutant KRAS. It also suppressed migration and invasion of gemcitabine-resistant and parental pancreatic cancer cells. Overall, we demonstrated that inhibiting the Wnt/β-catenin and RAS/ERK pathways by destabilizing β-catenin and RAS could be a therapeutic approach to overcome gemcitabine resistance in pancreatic cancer.
|Number of pages||7|
|Journal||Biochemical and Biophysical Research Communications|
|Publication status||Published - 2021 Apr 16|
Bibliographical noteFunding Information:
We thank S.Y Song and Professor J.S Noh for providing the pancreatic cancer cell lines. This study was supported by the Brain Korea 21 ( BK21 ) Program and the National Research Foundation of Korea (NRF) grant funded by the Korean Government ( MSIP ) ( 2019R1A2C3002751 , 2020M3E5E2040018 ). W.-J. Ryu was supported by the Global Ph.D Fellowship Program through the NRF, funded by the Ministry of Education ( 2015H1A2A1034548 ).
© 2021 The Authors
All Science Journal Classification (ASJC) codes
- Molecular Biology
- Cell Biology