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Photoacoustic imaging (PAI) has started to emerge in clinics for cancer care from early detection to therapy monitoring. Herein, we encapsulate indocyanine green J-aggregates (ICGJ), an FDA-approved NIR contrast agent, into biodegradable polymersomes (ICGJ-Ps) with high loading for strong photoacoustic signals. The small Ps hydrodynamic diameter of 80-90nm is beneficial for the ability to penetrate tumors and for uptake in cancer cells. The high ICGJ loadings up to ~40% produce strong photoacoustic (PA) signals. Conjugation of ICGJ-Ps with cetuximab antibodies produced PA signals in breast cancer cells that correlated well with their inherent EGFR expression levels indicating exceptional specificity.
Mohammed Kawelah,Sangheon Han,Ceren Dincer,Aasim Hussain,Alexander Marras,Thomas Truskett,Konstantin Sokolov, andKeith Johnston
"Biodegradable polymersomes with encapsulated indocyanine green J-aggregates for highly selective photoacoustic cancer imaging", Proc. SPIE PC12842, Photons Plus Ultrasound: Imaging and Sensing 2024, PC128421A (13 March 2024); https://doi.org/10.1117/12.3002660
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Mohammed Kawelah, Sangheon Han, Ceren Dincer, Aasim Hussain, Alexander Marras, Thomas Truskett, Konstantin Sokolov, Keith Johnston, "Biodegradable polymersomes with encapsulated indocyanine green J-aggregates for highly selective photoacoustic cancer imaging," Proc. SPIE PC12842, Photons Plus Ultrasound: Imaging and Sensing 2024, PC128421A (13 March 2024); https://doi.org/10.1117/12.3002660