How immune cells communicate (IMAGE) Harvard Medical School Caption A microscope image of melanoma cells. The green T cell in the center has been activated and is producing interferon-gamma (pink/red), a signaling molecule necessary for certain cancer immunotherapies to work. The Oyler-Yaniv lab is studying how interferon-gamma spreads through dense tissues in the body Credit Oyler-Yaniv lab 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.