sPLA2 inhibitor (IMAGE) Japan Science and Technology Agency Caption In tumorigenesis, sPLA2 is secreted by tumor-associated macrophages in tumor tissue. When the membrane phospholipids of EVs secreted from tumor cells are modified by sPLA2, various fatty acids and lysophospholipids are liberated, leading to changes in EV morphology and GPCR signaling enhancement, accelerated uptake, etc. are induced. As a result, the establishment of the tumor microenvironment is rapidly accelerated, leading to tumorigenesis. In contrast, inhibition of this sPLA2-EV axis by varespladib, an sPLA2 inhibitor, suppressed tumor formation. Thus, the sPLA2-EV axis may be a novel drug target for cancer therapy. Credit Kai Kudo Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.