Nili Kahane1, Tali Bdolah-Abram1, Hilli Raskansky1, Ron Ofri2. 1. Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, 7610001, Israel. 2. Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, 7610001, Israel. ron.ofri@mail.huji.ac.il.
Abstract
PURPOSE: Prostaglandin analogs contribute to blood-aqueous barrier breakdown and may exacerbate uveitis. As these analogs induce de novo synthesis of endogenous prostaglandins, their therapeutic, hypotensive effect could potentially be inhibited by anti-inflammatory treatment. We therefore evaluated whether topical 1% prednisolone acetate alters the effects of 0.005% latanoprost on pupil diameter (PD) and intraocular pressure (IOP). ANIMALS STUDIED: Ten healthy Labrador retriever dogs from the Israel Guide Dog Center for the Blind. METHODS: Pupil diameter and IOP were measured hourly, 8 AM-4 PM, with the right and left eyes serving as control (CE) and treated (TE) eyes, respectively. Measurements were conducted during four sessions: (1) without treatment (n = 10), (2) following latanoprost treatment (n = 10) at 8 AM, (3) following prednisolone treatment (n = 7) at 8 AM, and (4) bilateral latanoprost treatment at 8 AM, prednisolone treatment in TE at 11 AM (n = 8). The different number of dogs in sessions 3 and 4 is because some dogs were matched with their new owners earlier than expected. RESULTS: Pupil diameters were not affected by the addition of prednisolone and, at 4 PM, were 3.82 ± 0.47 and 3.97 ± 0.36 mm in TE and CE, respectively (P = 0.175, Wilcoxon). IOPs were not affected by the addition of prednisolone and, at 4 PM, were 9.0 ± 0.8 and 9.3 ± 0.8 mm Hg in TE and CE, respectively (P = 0.339, Wilcoxon). CONCLUSION: Prednisolone did not alter latanoprost's miotic and hypotensive effects in normal dogs during this study period.
PURPOSE:Prostaglandin analogs contribute to blood-aqueous barrier breakdown and may exacerbate uveitis. As these analogs induce de novo synthesis of endogenous prostaglandins, their therapeutic, hypotensive effect could potentially be inhibited by anti-inflammatory treatment. We therefore evaluated whether topical 1% prednisolone acetate alters the effects of 0.005% latanoprost on pupil diameter (PD) and intraocular pressure (IOP). ANIMALS STUDIED: Ten healthy Labrador retriever dogs from the Israel Guide Dog Center for the Blind. METHODS: Pupil diameter and IOP were measured hourly, 8 AM-4 PM, with the right and left eyes serving as control (CE) and treated (TE) eyes, respectively. Measurements were conducted during four sessions: (1) without treatment (n = 10), (2) following latanoprost treatment (n = 10) at 8 AM, (3) following prednisolone treatment (n = 7) at 8 AM, and (4) bilateral latanoprost treatment at 8 AM, prednisolone treatment in TE at 11 AM (n = 8). The different number of dogs in sessions 3 and 4 is because some dogs were matched with their new owners earlier than expected. RESULTS: Pupil diameters were not affected by the addition of prednisolone and, at 4 PM, were 3.82 ± 0.47 and 3.97 ± 0.36 mm in TE and CE, respectively (P = 0.175, Wilcoxon). IOPs were not affected by the addition of prednisolone and, at 4 PM, were 9.0 ± 0.8 and 9.3 ± 0.8 mm Hg in TE and CE, respectively (P = 0.339, Wilcoxon). CONCLUSION:Prednisolone did not alter latanoprost's miotic and hypotensive effects in normal dogs during this study period.