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Title: Lycium barbarum polysaccharides rescue neurodegeneration in an acute ocular hypertension rat model under pre- and posttreatment conditions
Authors: Lakshmanan, Y 
Wong, FSY 
Yu, WY 
Li, SZC 
Choi, KY 
So, KF
Chan, HHL 
Issue Date: 2019
Publisher: Association for Research in Vision and Ophthalmology
Source: Investigative ophthalmology and visual science, 2019, v. 60, no. 6, p. 2023-2033 How to cite?
Journal: Investigative ophthalmology and visual science 
Abstract: Purpose: To investigate the posttreatment neuronal rescue effects of Lycium barbarum polysaccharides (LBP) in an acute ocular hypertensive (AOH) model. Methods: Intraocular pressure (IOP) was elevated manometrically to 80 mm Hg (AOH) or 15 mm Hg (sham) for 120 minutes in adult Sprague-Dawley rats. Five experimental groups were considered: Three AOH groups were pretreated with PBS (vehicle) (n = 9), LBP 1 mg/kg (n = 8), or 10 mg/kg (n = 13), and one AOH group was posttreated with LBP 10 mg/kg (n = 8), once daily. The sham cannulation group (n = 5) received no treatment. Pretreatments commenced 7 days before and posttreatment 6 hours after AOH, and continued up through postcannulation day 28. All the animals underwent optical coherence tomography and electroretinogram measurements at baseline and postcannulation days 10 and 28. The ganglion cell layer (GCL) densities were quantified at day 28. Results: Both inner retinal layer thickness (IRLT) and positive scotopic threshold response (pSTR) underwent significant reduction (≥50% of thickness and amplitude) in the vehicle group (P < 0.05). Pretreatment with LBP 1 and 10 mg/kg retained 77 ± 11% and 89 ± 8% of baseline IRLT, respectively, and preserved pSTR functions. The posttreatment group showed a significant reduction in IRLT (-35 ± 8%, P < 0.001) and pSTR (∼48% of baseline, P < 0.001) on day 10. By day 28, there was an improvement in functional pSTR (∼72% of baseline, P > 0.05) with no significant further thinning (-40 ± 8%, P = 0.15) relative to day 10. GCL density was reduced in vehicle control (P = 0.0001), but did not differ between sham and pre- and posttreated AOH groups. Conclusions: The rescue effect of LBP posttreatment was observed later, which arrested the secondary degeneration and improved the retinal function.
EISSN: 1552-5783
DOI: 10.1167/iovs.19-26752
Rights: Copyright 2019 The Authors. This work is licensed under a Creative Commons Attribution 4.0 International License.
The following publication Lakshmanan Y, Wong FS-Y, Yu W-Y, et al. Lycium barbarum polysaccharides rescue neurodegeneration in an acute ocular hypertension rat model under pre- and posttreatment conditions. Invest Ophthalmol Vis Sci. 019;60:2023–2033 is available at
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