Effect of pan-retinal laser photocoagulation on plasma VEGF, endothelin-1 and nitric oxide in PDR.

Abstract:

AIM:To study plasma levels of vascular endothelial growth factor (VEGF), endothelin-1(ET-1) and nitric oxide (NO) in patients with proliferative diabetic retinopathy (PDR) before and after pan-retinal photocoagulation (PRP). METHODS:Forty patients (23 females and 17 males, mean age 48.5±12.2 years) with PDR without previous PRP therapy were studied. Blood samples were obtained before and 3 months after the last PRP session. Baseline (prelaser) plasma levels of VEGF, ET-1 and NO were compared with their levels in 30 healthy age- and sex- matched controls and also with plasma levels 3 months post-PRP. RESULTS:Patients with PDR had significantly raised plasma VEGF (375±89ng/L), ET-1(20±5ng/L) and NO (135±53µmol/L) when compared with healthy control group (P<0.01). After PRP, there was a significant reduction in plasma VEGF (179±66ng/L), ET-1 (11±5ng/L) and NO (91±49µmol/L) levels at 3 months' follow-up but still significantly higher than healthy controls. CONCLUSION:Patients with PDR demonstrate elevated VEGF, ET-1 and NO, which decrease after successful laser treatment.

journal_name

Int J Ophthalmol

authors

Mohamed TA,Mohamed Sel-D

doi

10.3980/j.issn.2222-3959.2010.01.05

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

19-22

issue

1

eissn

2222-3959

issn

2227-4898

pii

ijo-03-01-019

journal_volume

3

pub_type

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