Anti-placental growth factor for DME shows promise

APR 05, 2018 By Keng Jin Lee Nasdaq Retina/Vitreous
ThromboGenics announced positive data from a phase 1/2 trial assessing the safety and tolerability of THR-317, an experimental treatment for diabetic macular edema (DME). THR-317 is a recombinant humanized monoclonal antibody directed against human placental growth factor (PIGF), a member of the VEGF subfamily. Preclinical models have demonstrated that anti-PIGF has anti-angiogenic, anti-edema and anti-inflammatory properties. Conducted in Czechia, Hungary and Slovakia, the trial (NCT03071068) enrolled 49 patients with diabetes, of which 40 were treatment naïve and 9 had previously demonstrated suboptimal response to anti-VEGF therapy. Patients were randomized to 3 monthly injections of 4-mg or 8-mg THR-317. The Belgium-based biotech reported initial improvements in best-corrected visual acuity for the treatment-naïve group. Thirty days after the last intravitreal anti-PIGF administration, 30% of patients in the 8 mg group showed a 15-letter gain or greater from baseline versus 5.3 % in the 4 mg group. No dose-limiting toxicities or relevant adverse events were reported at either dose. According to ThromoGenics, the findings support further study of THR-317 combined with anti-VEGF therapy. The company expects the next clinical trial to begin in the second quarter of 2018.

https://www.lvcenter4sight.com/anti-placental-growth-factor-for-dme-shows-promise/

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