Lyve1+/GFPCre mice were obtained from the Jackson Laboratory (stock no. 012601) (31 (link)) and were back-crossed to NMRI background for at least 6 generations. Prox1+/ (Prox1+/LacZ, Prox1+/GFPCre) mice have been reported previously (62 (link), 63 (link)). Lepob/ob mice (referred to as ob/ob mice herein) were also obtained from the Jackson Laboratory and backcrossed to the NMRI background. Prox1+/Flox and Jojo-Prox1 mice have been described previously (7 (link), 33 (link), 34 (link)).