Figure 4. IOP changes in GDF15 null mice.

A). To determine the effects of absence of GDF15 expression on IOP, IOP was evaluated in GDF15 null mice (10-month-old) using a rebound tonometer. GDF15 null mice (KO; n=16 eyes) showed no change in IOP compared to the age-matched wild type mice (n=20 eyes). B). Light microscopy based histological examination showed no recordable differences in the conventional AH pathway, and in ciliary body (CB)) between GDF15 null and wild-type mice. TM; trabecular meshwork, SC; Schlemm’s canal, KO; knockout, WT; wild type, ns; not significant. Bar indicates image magnification.