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Different Cytotoxic Effects of Cisplatin on Pancreatic Ductal Adenocarcinoma Cell Lines

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Journal Int J Mol Sci
Publisher MDPI
Date 2025 Jan 8
PMID 39769425
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Abstract

This study examined the response to cisplatin in BxPC-3, Mia-Paca-2, PANC-1, and YAPC pancreatic cancer lines with different genotypic and phenotypic characteristics, and the mechanisms associated with their resistance. BxPC-3 and MIA-PaCa-2 cell lines were the most sensitive to cisplatin, while YAPC and PANC-1 were more resistant. Consistently, in cisplatin-treated BxPC-3 cells, the cleavage patterns of pro-caspase-9, -7, -3, and PARP-1 demonstrated that they were more sensitive than YAPC cells. The autophagic pathway, promoting cisplatin resistance, was active in BxPC-3 cells, as demonstrated by the time-dependent conversion of LC3-I to LC3-II, whereas it was not activated in YAPC cells. In cisplatin-treated BxPC-3 cells, Bcl-2 decreased, while Beclin-1, Atg-3, and Atg-5 increased along with JNK1/2 phosphorylation. Basal levels of phosphorylated ERK1/2 in each cell line were positively correlated with cisplatin IC50 values, and cisplatin caused the activation of ERK1/2 in BxPC-3 and YAPC cells. Furthermore, ERK1/2 pharmacological inactivation increased cisplatin lethality in both BxPC-3 and YAPC cells, suggesting that p-ERK1/2 may be related to cisplatin resistance of PDAC cells. Different mechanisms and strategies are generally required to acquire drug resistance. Here, we partially explain the other response to cisplatin of BxPC-3 and YAPC cell lines by relating it to the role of ERK pathway.

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