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ZDHHC2-mediated AGK S-palmitoylation inactivates PTEN to reduce sensitivity to sunitinib in ccRCC

ABSTRACT: ZDHHC2-mediated AGK S-palmitoylation inactivates PTEN to reduce sensitivity to sunitinib in ccRCC

PROVIDER: PRJNA840934 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19334969_1.fastq.gz	Fastqsanger.gz
	SRR19334969_2.fastq.gz	Fastqsanger.gz
	SRR19334970_1.fastq.gz	Fastqsanger.gz
	SRR19334970_2.fastq.gz	Fastqsanger.gz
	SRR19334971_1.fastq.gz	Fastqsanger.gz

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ZDHHC2-mediated AGK S-palmitoylation inactivates PTEN to reduce sensitivity to sunitinib in ccRCC

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Project description:VHL mutations are the most common tumorigenic lesions in clear cell renal cell carcinoma (ccRCC) and result in continued activation of the HIF/VEGF pathway and uncontrolled cancer progression. Receptor tyrosine kinase (RTK) inhibitors such as sunitinib have been demonstrated to target tumorigenic signaling pathways, delay tumor progression and improve patient prognosis in metastatic renal cell carcinoma (mRCC). Although several mechanisms of sunitinib resistance have been reported, the solutions to overcome this resistance remain still unclear. In our study, we found that increased expression of YB1 (Y box binding protein 1, a multidrug resistance associated protein) and EphA2 (a member of erythropoietin-producing hepatocellular (Eph) receptors, belonging to the RTK family) mediated sunitinib resistance and mRCC exhibited a large phenotypic dependence on YB1 and EphA2. In addition, our findings confirm that YB1 promotes the invasion, metastasis and sunitinib resistance of ccRCC by regulating the EphA2 signaling pathway. Furthermore, pharmacological inhibition of EphA2 through the small molecule inhibitor ALW-II-41-27 reduced the proliferation of sunitinib-resistant tumor cells and suppressed tumor growth in vivo and restored the sensitivity of sunitinib-resistant tumor cells to sunitinib in vitro and in vivo. Mechanistically, YB1 increases the protein levels of EphA2 by maintaining the protein stabilization of EphA2 through inhibiting the proteasomal degradation pathway. Collectively, our findings provide the theoretical rationale that ccRCC metastasis and RTK-directed therapeutic resistance could be prospectively and purposefully targeted.

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