Reg1Δ/&Delta (IMAGE) Osaka University Caption Reg1Δ/Δ mice lost weight and died within 110 days (left). Macroscopically, Reg1Δ/Δ mice exhibited severe splenomegaly and mesenteric lymphadenopathy (right). Credit Osaka University 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.