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- W4362567874 abstract "<div>Abstract<p>Repurposing cationic amphiphilic drugs (CAD) for cancer treatment is emerging as an attractive means to enhance the efficacy of chemotherapy. Many commonly used CADs, including several cation amphiphilic antihistamines and antidepressants, induce cancer-specific, lysosome-dependent cell death and sensitize cancer cells to chemotherapy. CAD-induced inhibition of lysosomal acid sphingomyelinase is necessary, but not sufficient, for the subsequent lysosomal membrane permeabilization and cell death, while other pathways regulating this cell death pathway are largely unknown. Prompted by significant changes in the expression of genes involved in Ca<sup>2+</sup> and cyclic AMP (cAMP) signaling pathways in CAD-resistant MCF7 breast cancer cells, we identified here an early lysosomal Ca<sup>2+</sup> release through P2X purinergic receptor 4 (P2RX4) and subsequent Ca<sup>2+</sup>- and adenylyl cyclase 1 (ADCY1)-dependent synthesis of cAMP as a signaling route mediating CAD-induced lysosomal membrane permeabilization and cell death. Importantly, pharmacologic and genetic means to increase cellular cAMP levels either by activating cAMP-inducing G-protein–coupled receptors (GPR3 or β<sub>2</sub> adrenergic receptor) or ADCY1, or by inhibiting cAMP-reducing guanine nucleotide-binding protein G(i) subunit α2, C-X-C motif chemokine receptor type 4, or cAMP phosphodiesterases, sensitized cancer cells to CADs. These data reveal a previously unrecognized lysosomal P2RX4- and ADCY1-dependent signaling cascade as a pathway essential for CAD-induced lysosome-dependent cell death and encourage further investigations to find the most potent combinations of CADs and cAMP-inducing drugs for cancer therapy.</p></div>" @default.
- W4362567874 created "2023-04-06" @default.
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- W4362567874 date "2023-04-03" @default.
- W4362567874 modified "2023-10-14" @default.
- W4362567874 title "Data from Cell Death Induced by Cationic Amphiphilic Drugs Depends on Lysosomal Ca<sup>2+</sup> Release and Cyclic AMP" @default.
- W4362567874 doi "https://doi.org/10.1158/1535-7163.c.6539265.v1" @default.
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