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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effect of antihypertensive treatment on blood-retinal barrier permeability to fluorescein in hypertensive type 1 (insulin-dependent) diabetic patients with background retinopathy.

The effect of antihypertensive treatment on blood-retinal barrier leakage of fluorescein in background retinopathy was studied in nine hypertensive Type 1 (insulin-dependent) diabetic patients suffering from nephropathy. The patients were investigated before and after 7 (3 to 13) months of treatment with captopril (n = 8; 25 to 100 mg daily) and a diuretic, either frusemide (n = 4; 80 to 200 mg daily) or bendrofluazide (n = 2; 2.5 mg daily). Retinal function was assessed by fundus photography, fluorescein angiography, vitreous fluorometry, and renal function by glomerular filtration rate, and albuminuria. The antihypertensive treatment induced a significant reduction (p less than 0.05) in: blood pressure from 152/97 +/- 14/8 mmHg to 134/82 +/- 11/6 mmHg; blood-retinal barrier leakage of fluorescein from 2.4 +/- 1.1 to 1.4 +/- 0.5.10(-7) cm/second; albuminuria from 1391 (range: 168-4852) micrograms/min to 793 (range: 35-2081) micrograms/min. Glomerular filtration rate declined from 88 +/- 15 to 78 +/- 23 ml.min-1.1.73 m2 (0.05 less than p less than 0.10). The metabolic control of the patients as reflected by their blood glucose and HbA1c levels remained stable during the study. Our study suggests that systemic blood pressure elevation contributes to the abnormal blood-retinal barrier permeability to fluorescein characteristically found in diabetic background retinopathy and that this abnormality can be reversed during antihypertensive treatment.[1]


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