November 1979
Volume 18, Issue 11
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Articles  |   November 1979
Ocular fluorophotometry in streptozotocin diabetes mellitus in the rat: effect of pancreatic islet isografts.
Investigative Ophthalmology & Visual Science November 1979, Vol.18, 1185-1190. doi:
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      T Krupin, S R Waltman, D W Scharp, C Oestrich, S D Feldman, B Becker, W F Ballinger, P E Lacy; Ocular fluorophotometry in streptozotocin diabetes mellitus in the rat: effect of pancreatic islet isografts.. Invest. Ophthalmol. Vis. Sci. 1979;18(11):1185-1190.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Fluorophotometry was used to evaluate the integrity of the blood-ocular barriers to fluorescein in experimental diabetes mellitus in rats. This technique allowed quantitation of ocular fluorescein concentrations following intravenous injection. Streptozotacin-induced diabetes resulted in an increased fluorescein accumulation in the anterior chamber (1.52 +/- 0.17 microgram/ml, mean +/- S.E.M.) and vitreous (0.82 +/- 0.11) over baseline nondiabetic levels (0.68 +/- 0.80 and 0.40 +/- 0.03, respectively). Fluorophotometry was repeated at 5, 13, and 20 days following portal vein pancreatic islet transplantation. At 5 days anterior chamber (1.40 +/- 0.17) and vitreous (0.61 +/- 0.08) fluorescein concentrations remained elevated. However, at 13 and 20 days following islet transplantation, ocular fluorescein concentrations were identical to levels observed prior to the induction of diabetes. Intravenous glucose (0.5 gm/kg) tolerance testing was performed 5 and 13 days following transplantation. The glucose responses to the tolerance test were normal and similar at both times. However, at 5 days the insulin response was abnormal with a decreased initial peak and an absent second peak. At 13 days there was a normal biphasic insulin response. In experimental diabetes mellitus ocular vascular permeability was more closely correlated with insulin than blood glucose abnormalities.

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