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Advanced Science

Advanced Science

IF: 14.3
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Calcium Channel Blocker Lacidipine Promotes Antitumor Immunity by Reprogramming Tryptophan Metabolism

Published:25 November 2024 DOI: 10.1002/advs.202409310 PMID: 39585774
Yuwen Sheng, Chong Qiao, Zhonghui Zhang, Xiaoke Shi, Linhan Yang, Ruiying Xi, Jialing Yu, Wanli Liu, Guolin Zhang, Fei Wang

Abstract

Dysfunction of calcium channels is involved in the development and progression of some cancers. However, it remains unclear the role of calcium channel inhibitors in tumor immunomodulation. Here, calcium channel blocker lacidipine is identified to potently inhibit the enzymatic activity and expression of indoleamine 2,3-dioxygenase 1 (IDO1), a rate-limiting enzyme in tryptophan metabolism. Lacidipine activates effector T cells and incapacitates regulatory T cells (Tregs) to augment the anti-tumor effect of chemotherapeutic agents in breast cancer by converting immunologically "cold" into "hot" tumors. Mechanistically, lacidipine targets calcium channels (CaV1.2/1.3) to inhibit Pyk2-JAK1-calmodulin complex-mediated IDO1 transcription suppression, which suppresses the kynurenine pathway and maintains the total nicotinamide adenine dinucleotide (NAD) pool by regulating NAD biosynthesis. These results reveal a new function of calcium channels in IDO1-mediated tryptophan metabolism in tumor immunity and warrant further development of lacidipine for the metabolic immunotherapy in breast cancer.

Substances (3)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Ascorbic Acid 50-81-7 C6H8O6 1631 suppliers $6.00-$2170.00
L-Tryptophan 73-22-3 C11H12N2O2 1113 suppliers $5.00-$8386.00
CATALASE 9001-05-2 C9H10O3 329 suppliers $34.70-$1280.00

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