Ectopic ATP synthase stimulates the secretion of extracellular vesicles in cancer cells

Yi Chun Kao, Yi Wen Chang, Charles P. Lai, Nai Wen Chang, Chen Hao Huang, Chien Sheng Chen, Hsuan Cheng Huang*, Hsueh Fen Juan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Ectopic ATP synthase on the plasma membrane (eATP synthase) has been found in various cancer types and is a potential target for cancer therapy. However, whether it provides a functional role in tumor progression remains unclear. Here, quantitative proteomics reveals that cancer cells under starvation stress express higher eATP synthase and enhance the production of extracellular vesicles (EVs), which are vital regulators within the tumor microenvironment. Further results show that eATP synthase generates extracellular ATP to stimulate EV secretion by enhancing P2X7 receptor–triggered Ca2+ influx. Surprisingly, eATP synthase is also located on the surface of tumor-secreted EVs. The EVs-surface eATP synthase increases the uptake of tumor-secreted EVs in Jurkat T-cells via association with Fyn, a plasma membrane protein found in immune cells. The eATP synthase-coated EVs uptake subsequently represses the proliferation and cytokine secretion of Jurkat T-cells. This study clarifies the role of eATP synthase on EV secretion and its influence on immune cells.

Original languageEnglish
Article number642
JournalCommunications Biology
Issue number1
StatePublished - Dec 2023


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