Open AccessVoltage-sensitive dye delivery through the blood brain barrier using adenosine receptor agonist regadenoson
Author(s) -
Rebecca W. Pak,
Jeeun Kang,
Heather Valentine,
Leslie M. Loew,
Daniel L.J. Thorek,
Emad M. Boctor,
Dean F. Wong,
Jin U. Kang
Publication year - 2018
Publication title -
biomedical optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.9.003915
Subject(s) - regadenoson , voltage sensitive dye , agonist , adenosine , adenosine receptor , medicine , pharmacology , biomedical engineering , receptor , electrophysiology , myocardial perfusion imaging , perfusion
Optical imaging of brain activity has mostly employed genetically manipulated mice, which cannot be translated to clinical human usage. Observation of brain activity directly is challenging due to the difficulty in delivering dyes and other agents through the blood brain barrier (BBB). Using fluorescence imaging, we have demonstrated the feasibility of delivering the near-infrared voltage-sensitive dye (VSD) IR-780 perchlorate to the brain tissue through pharmacological techniques, via an adenosine agonist (regadenoson). Comparison of VSD fluorescence of mouse brains without and with regadenoson showed significantly increased residence time of the fluorescence signal in the latter case, indicative of VSD diffusion into the brain tissue. Dose and timing of regadenoson were varied to optimize BBB permeability for VSD delivery.