ArticleOA
作者: Menon, Geeta Vishwanath ; Moroz, Iris ; Goldstein, Michaella ; Palmer, James ; Chi-Burris, Katherine ; Yan, Eric ; Agostini, Hansjuergen ; Rosenblatt, Irit ; Midena, Edoardo ; Staurenghi, Giovanni ; Larsen, Michael ; Paggiarino, Dario A. ; Aitchison, Roger ; Brand, Christopher S. ; Nagpal, Manish ; Hariprasad, Seenu Mavidi ; Klamerus, Karen J. ; Marcus, Dennis Michael ; Lujan, Silvio ; Kurup, Shree Kumar ; Chace, Richard ; Erlich, Shai S. ; Stern, Walter ; Maturi, Raj Kishore ; Sun, Jennifer ; Nduaka, Chudy I. ; Majid, Mohammed Azhar ; Schachar, Ronald A. ; Eting, Eva ; Sperling, Marvin ; Lattanzio, Rosangela ; Tobaru, Luis ; Reichel, Elias ; Munch, Inger Christine ; Lotery, Andrew ; Murthy, Praveen Ramachandra ; Gaitan, Jaime ; Viola, Francesco ; Ferencz, Joseph R. ; Abraham, Prema ; Basile, Anthony S. ; Azad, Rajvardhan ; Lanzetta, Paolo ; Kokame, Gregg ; Bandello, Francesco Maria ; Balestrazzi, Emilio ; Varano, Monica ; Nguyen, Quan Dong ; Wiedemann, Peter ; Campbell, Charles H. ; Lazarus, Howard Steven ; Basu, Soumyava ; Spital, Georg ; Khan, Khuram A. ; Tolentino, Michael John
PURPOSE:To evaluate the safety and efficacy of three doses of PF-04523655, a 19-nucleotide methylated double stranded siRNA targeting the RTP801 gene, for the treatment of diabetic macular edema (DME) compared to focal/grid laser photocoagulation.
METHODS:This multicenter, prospective, masked, randomized, active-controlled, phase 2 interventional clinical trial enrolled 184 DME patients with best corrected visual acuity (BCVA) of 20/40 to 20/320 inclusive in the study eye. Patients were randomly assigned to 0.4-mg, 1-mg, 3-mg PF-04523655 intravitreal injections or laser. The main outcome measure was the change in BCVA from baseline to month 12.
RESULTS:All doses of PF-04523655 improved BCVA from baseline through month 12. At month 12, the PF-04523655 3-mg group showed a trend for greater improvement in BCVA from baseline than laser (respectively 5.77 vs. 2.39 letters; P = 0.08; 2-sided α = 0.10). The study was terminated early at month 12 based on predetermined futility criteria for efficacy and discontinuation rates. PF-04523655 was generally safe and well-tolerated, with few adverse events considered treatment-related. By month 12, the discontinuation rates in the PF-04523655 groups were higher than the laser group and were inversely related to dose levels.
CONCLUSIONS:PF-04523655 showed a dose-related tendency for improvement in BCVA in DME patients. Studies of higher doses are planned to determine the optimal efficacious dose of PF-04523655. PF-04523655 may offer a new mode of therapeutic action in the management of DME. (ClinicalTrials.gov number, NCT00701181.).