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Mol Imaging Biol. 2009 Mar-Apr;11(2):79-87. doi: 10.1007/s11307-008-0148-1. Epub 2008 Oct 24.

Imaging and pharmacokinetics of (64)Cu-DOTA-HB22.7 administered by intravenous, intraperitoneal, or subcutaneous injection to mice bearing non-Hodgkin's lymphoma xenografts.

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Division of Hematology and Oncology, Department of Internal Medicine, University of California, Davis Cancer Center, Davis, CA, USA.



The aim of the study is to compare the tumor-specific targeting, pharmacokinetics, and biodistribution of (64)Cu-DOTA-HB22.7 when administered to xenograft-bearing mice intravenously (IV), intraperitoneally (IP), and subcutaneously (SQ).


Mice bearing human non-Hodgkin's lymphoma (NHL) xenografts were injected IV, IP, or SQ with (64)Cu-DOTA-HB22.7. Xenograft targeting was evaluated by micro positron emission tomography (microPET) and confirmed by organ biodistribution studies. Blood measurements of (64)Cu were performed to determine the pharmacokinetics and clearance of (64)Cu-DOTA-HB22.7.


(64)Cu-DOTA-HB22.7 demonstrated equivalent tumor targeting within 24-48 h, regardless of the route of administration. Organ biodistribution confirmed tumor-specific targeting. Blood pharmacokinetics demonstrated that (64)Cu-DOTA-HB22.7 accessed the bloodstream after IP and SQ administration to a similar degree as IV administration, albeit at a slower rate.


These findings establish (64)Cu-DOTA-HB22.7 as a potential radioimmunotherapeutic and/or NHL-specific imaging agent. These findings provide evidence that IP and SQ administration can achieve results equivalent to IV administration and may lead to more efficient, reproducible treatment plans for antibody-based therapeutics.

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