Biodistribution and pharmacokinetic studies of a porphyrin dimer photosensitizer (Oxdime) by fluorescence imaging and spectroscopy in mice bearing xenograft tumors.

Abstract:

:Herein, we present a study of the pharmacokinetics and biodistribution of a butadiyne-linked conjugated porphyrin dimer (Oxdime) designed to have high near-infrared (NIR) 2-photon absorption cross-section for photodynamic therapy (PDT). Changes in biodistribution over time were monitored in mice carrying B16-F10 melanoma xenografts, following intravenous injection. Using fluorescence imaging of live animals and analyzing isolated organs ex vivo at different time points between 30 min and 24 h after injection, accumulation of Oxdime was measured in several organs (heart, kidney and liver) and in tumor. The concentration in the plasma was about 5-10 times higher than in other tissues. The fluorescence signal peaked at 3-12 h after injection in most tissues, including the tumor and the plasma. The change in the fluorescence emission spectrum of the sensitizer over time was also monitored and a shift in the maximum from 800 to 740 nm was observed over 24 h, showing that the Oxdime is metabolized. Significant quantities accumulated in the tumor, indicating that this PDT sensitizer may be promising for cancer treatment.

journal_name

Photochem Photobiol

authors

Khurana M,Ulrich S,Kim A,Moriyama Y,Netchev G,Akens MK,Anderson HL,Wilson BC

doi

10.1111/j.1751-1097.2012.01194.x

subject

Has Abstract

pub_date

2012-11-01 00:00:00

pages

1531-8

issue

6

eissn

0031-8655

issn

1751-1097

journal_volume

88

pub_type

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