Figure (IMAGE) Osaka University Caption The proposed model for the recruitment of circulating lymphocytes into milky spots. Aldh1a2+ fibroblastic reticular cell (FRC)-derived retinoic acid induces CXCL12 expression in the endothelium, which regulates the constitutive recruitment of circulating lymphocytes to the milky spots. Additionally, conventional FRCs are also the second source of CXCL12. Credit 2023, Yasutaka Okabe, Aldh1a2+ fibroblastic reticular cells regulate lymphocyte recruitment in omental milky spots, Journal of Experimental Medicine Usage Restrictions Credit must be given to the creator. License CC BY 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.