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Developing patient-derived organoids to identify JX24120 inhibit SAMe synthesis in endometrial cancer by targeting MAT2B



doi: 10.1016/j.phrs.2024.107420.


Online ahead of print.

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Chunxue Zhang et al.


Pharmacol Res.


.

Abstract

Endometrial cancer (EC) is one of the most common gynecologic malignancies, which lacking effective drugs for intractable conditions or patients unsuitable for surgeries. Recently, the patient-derived organoids (PDOs) are found feasible for cancer research and drug discoveries. Here, we established a series of PDOs from EC and performed drug repurposing screening and mechanism analysis for cancer treatment. We confirmed that the regulatory β subunit of methionine adenosyltransferase (MAT2B) is highly correlated with malignant progression in endometrial cancer. Through drug screening on PDOs, we identify JX24120, chlorpromazine derivative, as a specific inhibitor for MAT2B, which directly binds to MAT2B (Kd = 4.724μM) and inhibits the viability of EC PDOs and canonical cell lines. Correspondingly, gene editing assessment demonstrates that JX24120 suppresses tumor growth depending on the presence of MAT2B in vivo and in vitro. Mechanistically, JX24120 induces inhibition of S-adenosylmethionine (SAMe) synthesis, leading to suppressed mTORC1 signaling, abnormal energy metabolism and protein synthesis, and eventually apoptosis. Taken together, our study offers a novel approach for drug discovery and efficacy assessment by using the PDOs model. These findings suggested that JX24120 may be a potent MAT2B inhibitor and will hopefully serve as a prospective compound for endometrial cancer therapy.


Keywords:

3-Methyladenine (PubChem CID: 135398661); Endometrial cancer; JX24120; MAT2B; N-Acetylcysteine ethyl ester (PubChem CID: 6180); Necrostatin-1 (PubChem CID: 2828334); Patient-derived organoid; S-adenosylmethionine; S-adenosylmethionine (PubChem CID: 45072193); Z-VAD-FMK (PubChem CID: 87146076); chlorpromazine derivative.

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Conflict of interest statement

Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.


Fonte original PubMed

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