07 August 2019 | 00:13 Asia/Singapore A "switch" to regulate traffic across blood vessels Researchers from NUS Pharmacy and NUS Chemical and Biomolecular Engineering have discovered a control mechanism that regulates the traffic of cells and substances across blood vessels. This effect can have a significant impact on cancer metastasis. http://www.science.nus.edu.sg/research-highlights/2592-a-switch-that-regulates-traffic-across-blood-vessels