Fig. 4

Effect of Taprenepag, an EP2 agonist, on the Nphp1^−/−-associated retinopathy. (A) Representative images of H&E staining of retina sections from P21-old Nphp1^+/+ and Nphp1^−/− mice treated every 3 d with vehicle (5% Solutol) or Taprenepag (18 mg/kg) from P6 to P21. (Scale bar, 50 µm.) (B) Quantification of ONL/OPL thickness ratio in retinas from P21 Nphp1^−/− mice treated with vehicle (n = 8) or Taprenepag (n = 9). Each dot represents one mouse. Bars indicate mean. (C) Scotopic ERG recordings of P21-old Nphp1^+/+ or Nphp1^−/− retinas upon vehicle or Taprenepag treatment. (D) Quantification of scotopic a- (Left) and b-wave (Right) amplitude versus stimulus intensity (log) in P21 Nphp1^−/− mice treated by vehicle (SOL, n = 6) or Taprenepag (n = 7). Mann–Whitney U test: *P < 0.05, ns: not significant. Dots indicate mean ± SEM. INL, inner nuclear segment; IPL, inner plexiform layer; IS, inner segment; ONL, outer nuclear segment; OPL, outer plexiform layer; OS, outer segment; RPE, retinal pigmented epithelium; SOL, Solutol; TAP, Taprenepag.