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Research ArticleArticle

Pharmacokinetics of an Antisense Oligonucleotide Injected Intravitreally in Monkeys

Janet M. Leeds, Scott P. Henry, Steve Bistner, Scott Scherrill, Kevin Williams and Arthur A. Levin
Drug Metabolism and Disposition July 1998, 26 (7) 670-675;
Janet M. Leeds
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Scott P. Henry
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Steve Bistner
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Scott Scherrill
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Kevin Williams
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Arthur A. Levin
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Abstract

The kinetics of an intravitreally administered phosphorothioate oligonucleotide, ISIS 2922, were studied in cynomolgus monkeys. Vitreal and retinal concentrations were measured after administration of 11, 57, or 115 μg/eye. ISIS 2922 concentrations in vitreous and retina were compared, after single, weekly, or biweekly doses, for potential accumulation. ISIS 2922 levels were quantified using solid-phase extraction followed by capillary gel electrophoresis. Concentrations of ISIS 2922 in the vitreous were proportional to the dose and were nearly linear with respect to the dose. The ISIS 2922 concentrations 3 days after dosing ranged from 80 nM to approximately 1.5 μM. By 14 days after intravitreal injection, the concentrations were below the limit of quantitation (<10 nM) for all dose groups. There was no accumulation in the vitreous after multiple weekly or biweekly doses. The concentrations of ISIS 2922 in the retina 2 days after a single intravitreal injection ranged from 50 nM to 1.1 μM. The uptake and disposition of ISIS 2922 in the retina appeared to have been saturated between the 57- and 115-μg doses; the average concentrations were 0.71 ± 0.24 μM (N = 4) and 0.88 ± 0.27 μM (N = 3) for the two doses, respectively. Electrophoretic profiles of extracts revealed multiple chain-shortened oligonucleotides in the vitreous and retina, suggesting extensive metabolism in both compartments. Analyses from the multiple-dose study suggested that accumulation was dependent on the total administered dose, with accumulation occurring after biweekly dosing in the 115-μg dose group and only after weekly dosing in the 57-μg dose group.

Footnotes

  • Send reprint requests to: Janet M. Leeds, Isis Pharmaceuticals, Inc., 2292 Faraday Ave., Carlsbad, CA 92008.

  • ↵1 Joint first authors.

  • All work described in this report was paid for by Isis Pharmaceuticals, Inc.

  • ↵3 RF Azad and KP Anderson, unpublished observations.

  • Abbreviations used are::
    CMV
    cytomegalovirus
    RPE
    retinal pigmented epithelial
    SPE
    solid-phase extraction
    • Received October 10, 1997.
    • Accepted March 14, 1998.
  • The American Society for Pharmacology and Experimental Therapeutics
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Drug Metabolism and Disposition
Vol. 26, Issue 7
1 Jul 1998
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Research ArticleArticle

Pharmacokinetics of an Antisense Oligonucleotide Injected Intravitreally in Monkeys

Janet M. Leeds, Scott P. Henry, Steve Bistner, Scott Scherrill, Kevin Williams and Arthur A. Levin
Drug Metabolism and Disposition July 1, 1998, 26 (7) 670-675;

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Research ArticleArticle

Pharmacokinetics of an Antisense Oligonucleotide Injected Intravitreally in Monkeys

Janet M. Leeds, Scott P. Henry, Steve Bistner, Scott Scherrill, Kevin Williams and Arthur A. Levin
Drug Metabolism and Disposition July 1, 1998, 26 (7) 670-675;
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