Abstract
This retrospective study aimed to analyze the clinical outcomes of two regimens of intravitreal injections of conbercept [1+pro re nata (PRN) and 3 + Q3M] for the therapy of exudative age-related macular degeneration (AMD). In total, 105 eyes diagnosed with exudative AMD were enrolled. The eyes in the 1+PRN group (n = 51) received intravitreal injection of conbercept one time, followed by PRN retreatment. The eyes in the 3 + Q3M group (n = 54) received intravitreal injection of conbercept on three consecutive monthly, subsequently, once every three months for three times. After treatment, patients were followed up for 12 months. The best-corrected visual acuity (BCVA), central retinal thickness (CRT), and choroidal neovascularization (CNV) leakage area were compared before and after treatment. Moreover, the number of injections and adverse reactions were recorded. Compared with the 1+PRN group, BCVA was significantly improved and CRT was remarkably decreased in the 3 + Q3M group at 3, 6 and 12 months after operation. The disappeared or reduced CNV leakage area (93%) of the 3 + Q3M group was higher than that of the 1 + PRN group at the last follow-up. Moreover, the mean numbers of conbercept injections of the 1 + PRN group were less than the 3 + Q3M group. During the follow-up, there were no serious adverse reactions or ocular complications. This study reveals that intravitreal injection of conbercept using 3 + Q3M regimen has certain advantages than 1 + PRN regimen in extending drug delivery interval, improving patient’s vision, and reducing CRT.
Highlights
This retrospective study aimed to analyze the clinical outcomes of two regimens of intravitreal injections of conbercept [1+pro re nata (PRN) and 3 + Q3M] for the therapy of exudative age-related macular degeneration (AMD)
A phase 2 study has confirmed that visual acuity and anatomic benefits are obtained from repeated intravitreal conbercept injections that are well tolerated in patients with exudative
The mean best-corrected visual acuity (BCVA) changed from baseline to 12 months was from 0.84 ± 0.38 to 0.50 ± 0.25, and from 0.81 ± 0.39 to 0.33 ± 0.23 LogMAR in the 1 + PRN and 3 + Q3M groups, respectively
Summary
This retrospective study aimed to analyze the clinical outcomes of two regimens of intravitreal injections of conbercept [1+pro re nata (PRN) and 3 + Q3M] for the therapy of exudative age-related macular degeneration (AMD). The best-corrected visual acuity (BCVA), central retinal thickness (CRT), and choroidal neovascularization (CNV) leakage area were compared before and after treatment. This study reveals that intravitreal injection of conbercept using 3 + Q3M regimen has certain advantages than 1 + PRN regimen in extending drug delivery interval, improving patient’s vision, and reducing CRT. Large-scale clinical trials have confirmed that intravitreal injection of VEGF antagonists can prevent or improve vision loss in patients with exudative AMD 11–13. A phase 1 study has shown that conbercept can improve best-corrected visual acuity (BCVA), reduce central retinal thickness (CRT), and decreased CNV area in patients with exudative AMD16. A phase 2 study has confirmed that visual acuity and anatomic benefits are obtained from repeated intravitreal conbercept injections that are well tolerated in patients with exudative. Characteristics Sex Male Female Age (years) Eye Right Left BCVA (LogMAR) CRT (μm) CNV Location Extrafoveal Juxtafoveal Subfoveal
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