November 1992
Volume 33, Issue 12
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Articles  |   November 1992
Dissociation between prostaglandin levels and blood flow to the retina and choroid in the newborn pig after nonsteroidal antiinflammatory drugs.
Author Affiliations
  • R Parys-Van Ginderdeuren
    Department of Ophthalmology, University of Iowa, Iowa City.
  • D Malcolm
    Department of Ophthalmology, University of Iowa, Iowa City.
  • D R Varma
    Department of Ophthalmology, University of Iowa, Iowa City.
  • J V Aranda
    Department of Ophthalmology, University of Iowa, Iowa City.
  • S Chemtob
    Department of Ophthalmology, University of Iowa, Iowa City.
Investigative Ophthalmology & Visual Science November 1992, Vol.33, 3378-3384. doi:
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      R Parys-Van Ginderdeuren, D Malcolm, D R Varma, J V Aranda, S Chemtob; Dissociation between prostaglandin levels and blood flow to the retina and choroid in the newborn pig after nonsteroidal antiinflammatory drugs.. Invest. Ophthalmol. Vis. Sci. 1992;33(12):3378-3384.

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

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Abstract

To assess whether prostaglandins contribute to the control of basal retinal and choroidal hemodynamics, retinal (RBF) and choroidal blood flow (ChBF) were measured by a microsphere technique in 1- to 4-day-old pigs before and after (at 20 and 60 min) administration of indomethacin (0.3 mg/kg, n = 6 or 10 mg/kg, n = 5), ibuprofen (40 mg/kg, n = 7), naproxen (20 mg/kg, n = 5) or vehicle (n = 8). In 40 other animals, PGF2 alpha, PGE2, and 6-keto-PGF1 alpha were measured in the retina and choroid at times corresponding to blood flow measurements. Mean arterial blood pressure and blood gases and pH were not altered by any of the agents. Except for the lower dose of indomethacin (0.3 mg/kg), which did not change retinal and choroidal prostaglandin concentrations, the prostaglandin levels were decreased similarly (P < 0.01) by the three drugs. However, RBF and ChBF were not changed by ibuprofen and naproxen, but decreased to the same extent after low and high doses of indomethacin. The data suggest that the effects of indomethacin on RBF and ChBF cannot be simply attributed to prostaglandin synthesis inhibition, and that prostaglandins may not play a significant role in controlling basal blood flow to the retina and choroid.

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