(IMAGE) Tokyo University of Agriculture and Technology Caption TLR3 signaling activated by ds RNA [poly(I:C)] analogue induces the PGE2-mediated expression of RANKL that stimulates osteoclast formation and directly prolongs the life span of mature osteoclasts, that was leading alveolar bone resorption in periodontal disease. Credit Masaki Inada, Tokyo University of Agriculture and Technology Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. 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.