Avastin treatment reduces retinal neovascularization in a mouse model of retinopathy of prematurity

Current Eye Research
Ronen RabinowitzAbraham Spierer

Abstract

This study was designed to evaluate the effect of one intraperitoneal (IP) injection of bevacizumab (Avastin) on the severity of oxygen-induced retinopathy (OIR) in a mouse model. Twenty-eight eyes of 14 mice with OIR were studied. There were nine mice in the bevacizumab-treated group (study group) and five mice in the saline-treated group (controls). The mouse OIR model consisted of a 5-day exposure to 75% oxygen. On postnatal day 12 (P12), Avastin 2.5 mg/kg was administered IP to the study group and 2.5 mg/kg normal saline was administered IP to the controls. All 14 mice underwent fluorescein angiography of the retinal vasculature on P17 and the following parameters were scored (Modified Retinopathy Scoring System, MRSS): blood vessel growth, formation of blood vessel tufts, extraretinal neovascularization, degree of central constriction, and tortuosity of vessels. In addition, the neovascular vessels were quantified on the hematoxylin and eosin (H&S)-stained paraffin sections of the eyes in a masked fashion. The MRSS score in the Avastin-treated mice was significantly lower than that of the saline-treated mice (3.06 ± 1.63 versus 7.1 ± 2.01, respectively, p = 0.0021). The neovascularization count was also significantly lower...Continue Reading

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Jul 9, 2013·Investigative Ophthalmology & Visual Science·Victor H GuaiquilCarl P Blobel
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Aug 10, 2017·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Tadashi MatsumotoYuichi Hori

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