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Research ArticleSpecial Section on DMPK of Therapeutic Proteins

Evaluation of Near Infrared Fluorescent Labeling of Monoclonal Antibodies as a Tool for Tissue Distribution

Kip P. Conner, Brooke M. Rock, Gayle K. Kwon, Joseph P. Balthasar, Lubna Abuqayyas, Larry C. Wienkers and Dan A. Rock
Drug Metabolism and Disposition November 2014, 42 (11) 1906-1913; DOI: https://doi.org/10.1124/dmd.114.060319
Kip P. Conner
Biochemistry and Biophysics Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Seattle, Washington (K.P.C., B.M.R., G.K.K., L.C.W., D.A.R.); Department of Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, New York (J.P.B.); and Quantitative Pharmacology Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Thousand Oaks, California (L.A.)
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Brooke M. Rock
Biochemistry and Biophysics Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Seattle, Washington (K.P.C., B.M.R., G.K.K., L.C.W., D.A.R.); Department of Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, New York (J.P.B.); and Quantitative Pharmacology Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Thousand Oaks, California (L.A.)
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Gayle K. Kwon
Biochemistry and Biophysics Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Seattle, Washington (K.P.C., B.M.R., G.K.K., L.C.W., D.A.R.); Department of Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, New York (J.P.B.); and Quantitative Pharmacology Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Thousand Oaks, California (L.A.)
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Joseph P. Balthasar
Biochemistry and Biophysics Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Seattle, Washington (K.P.C., B.M.R., G.K.K., L.C.W., D.A.R.); Department of Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, New York (J.P.B.); and Quantitative Pharmacology Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Thousand Oaks, California (L.A.)
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Lubna Abuqayyas
Biochemistry and Biophysics Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Seattle, Washington (K.P.C., B.M.R., G.K.K., L.C.W., D.A.R.); Department of Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, New York (J.P.B.); and Quantitative Pharmacology Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Thousand Oaks, California (L.A.)
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Larry C. Wienkers
Biochemistry and Biophysics Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Seattle, Washington (K.P.C., B.M.R., G.K.K., L.C.W., D.A.R.); Department of Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, New York (J.P.B.); and Quantitative Pharmacology Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Thousand Oaks, California (L.A.)
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Dan A. Rock
Biochemistry and Biophysics Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Seattle, Washington (K.P.C., B.M.R., G.K.K., L.C.W., D.A.R.); Department of Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, New York (J.P.B.); and Quantitative Pharmacology Group in Pharmacokinetics and Drug Metabolism, Amgen Inc., Thousand Oaks, California (L.A.)
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This article has a correction. Please see:

  • Correction to “Evaluation of Near Infrared Fluorescent Labeling of Monoclonal Antibodies as a Tool for Tissue Distribution” - January 01, 2015

Abstract

The pharmacokinetic (PK) behavior of monoclonal antibodies (mAbs) is influenced by target-mediated drug disposition, off-target effects, antidrug antibody–mediated clearance, and interaction with fragment-crystallizable domain (Fc) receptors such as neonatal Fc receptor. All of these interactions hold the potential to impact mAb biodistribution. Near infrared (NIR) fluorescent probes offer an approach complementary to radionuclides to characterize drug disposition. Notably, the use of IRDye800 (IR800; LI-COR, Lincoln, NE) as a protein-labeling agent in preclinical work holds the potential for quantitative tissue analysis. Here, we tested the utility of the IR800 dye as a quantitative mAb tracer during pharmacokinetic analysis in both plasma and tissues using a model mouse monoclonal IgG1 (8C2) labeled with ≤1.5 molecules of IR800. The plasma PK parameters derived from a mixture of IR800-8C2 and 8C2 dosed intravenously to C57BL/6 mice at 8 mg/kg exhibited a large discrepancy in exposure depending on the method of quantitation [CLplasma = 8.4 ml/d per kilogram (NIR fluorescence detection) versus 2.5 ml/d per kilogram (enzyme-linked immunosorbent assay)]. The disagreement between measurements suggests that the PK of 8C2 is altered by addition of the IR800 dye. Additionally, direct fluorescence analysis of homogenized tissues revealed several large differences in IR800-8C2 tissue uptake when compared with a previously published study using [125I]8C2, most notably an over 4-fold increase in liver concentration. Finally, the utility of IR800 in combination with whole body imaging was examined by comparison of IR800-8C2 levels observed in animal sagittal cross-sections to those measured in homogenized tissues. Our results represent the first PK analysis in both mouse plasma and tissues of an IR800-mAb conjugate and suggest that mAb disposition is significantly altered by IR800 conjugation to 8C2.

Footnotes

    • Received July 30, 2014.
    • Accepted September 8, 2014.
  • dx.doi.org/10.1124/dmd.114.060319.

  • ↵Embedded ImageThis article has supplemental material available at dmd.aspetjournals.org.

  • Copyright © 2014 by The American Society for Pharmacology and Experimental Therapeutics
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Drug Metabolism and Disposition: 42 (11)
Drug Metabolism and Disposition
Vol. 42, Issue 11
1 Nov 2014
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Research ArticleSpecial Section on DMPK of Therapeutic Proteins

Near IR Labeling for Tissue Distribution

Kip P. Conner, Brooke M. Rock, Gayle K. Kwon, Joseph P. Balthasar, Lubna Abuqayyas, Larry C. Wienkers and Dan A. Rock
Drug Metabolism and Disposition November 1, 2014, 42 (11) 1906-1913; DOI: https://doi.org/10.1124/dmd.114.060319

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Research ArticleSpecial Section on DMPK of Therapeutic Proteins

Near IR Labeling for Tissue Distribution

Kip P. Conner, Brooke M. Rock, Gayle K. Kwon, Joseph P. Balthasar, Lubna Abuqayyas, Larry C. Wienkers and Dan A. Rock
Drug Metabolism and Disposition November 1, 2014, 42 (11) 1906-1913; DOI: https://doi.org/10.1124/dmd.114.060319
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