-dsRNA and +dsRNA (IMAGE) Johns Hopkins Medicine Caption Skin cells (keratinocytes) treated with an agent which activates TLR3 (dsRNA) can turn on important regeneration proteins, like Wnt7b (green). Credit Johns Hopkins Medicine Usage Restrictions None License Licensed 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.