GLI inhibitors overcome Erlotinib resistance in human pancreatic cancer cells by modulating E-cadherin
| Autor: | Ebrahim Hosseini, Zeinab Cheraghzadeh, Kazem Zibara, Reza Mahmoudi, Amir Ghanbari |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Epithelial-Mesenchymal Transition Pyridines 030106 microbiology Apoptosis Drug resistance Zinc Finger Protein GLI1 Erlotinib Hydrochloride 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine GLI1 Pancreatic cancer Tumor Cells Cultured medicine Humans Pharmacology (medical) Arsenic trioxide Hedgehog Cell Proliferation Pharmacology integumentary system biology Cadherin food and beverages Cadherins medicine.disease Hedgehog signaling pathway Gene Expression Regulation Neoplastic Pancreatic Neoplasms Pyrimidines Infectious Diseases Oncology chemistry Drug Resistance Neoplasm 030220 oncology & carcinogenesis embryonic structures biology.protein Cancer research Erlotinib Signal Transduction medicine.drug |
| Zdroj: | Journal of Chemotherapy. 31:141-149 |
| ISSN: | 1973-9478 1120-009X |
| Popis: | Inhibition of hedgehog (Hh) signalling pathway, including its end effector GLI1, can reverse epithelial-to-mesenchymal transition (EMT) which plays an important role in drug resistance of pancreatic cancer cells to Erlotinib (ETB). This study investigated the effect of GLI inhibitors Forskolin (FSK), GANT-61 (GNT), and Arsenic trioxide (ATX) on suppressing the resistance of pancreatic cancer cells to ETB. The effect of GLI inhibitors was evaluated by measuring mRNA expression levels of EMT factors using quantitative RT-PCR. Immunocytochemistry and flow cytometry were used to assess E-cadherin (E-Cad) and GLI1 protein levels. MTT and apoptosis assays were used to evaluate the synergistic effects for the combination treatment of each GLI inhibitor with ETB. Pancreatic cancer cells PANC-1 treated by GNT showed the highest significant reduction in mRNA levels of GLI1 and other EMT pathway genes. Moreover, GNT was able to upregulate E-Cad and downregulate GLI1 proteins, more than FSK, while ATX had no effect. Apoptosis levels of PANC-1 cells following treatment with LD30 concentrations of FSK, GNT, or ATX, showed 57%, 62% and 67%, respectively, in comparison to ETB (∼48%). Importantly, combination treatments of ETB with either FSK, GNT, or ATX demonstrated a significant increase in apoptotic cells reaching 61% (ETB + FSK), 80% (ETB + GNT) or 88% (ETB + ATX). FSK did not have much effect on the drug resistance of PANC-1 cells to ETB. However, GNT, but more effectively ATX, were able to reduce the drug resistance of this cell line to ETB. |
| Databáze: | OpenAIRE |
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