Nanostructure-Driven Indocyanine Green Dimerization Generates Ultra-Stable Phototheranostics Nanoparticles

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Kwon, Nahyun ; Jasinevicius, Gabriel O. ; Kassab, Giulia ; Ding, Lili ; Bu, Jiachuan ; Martinelli, Leticia P. ; Ferreira, Vinicius G. ; Dhaliwal, Alexander ; Chan, Harley H. L. ; Mo, Yulin ; Bagnato, Vanderlei S. ; Kurachi, Cristina ; Chen, Juan ; Zheng, Gang ; Buzza, Hilde H.

• Tipo de documento: Artigo Científico
• Fonte: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; v. N/A, p. 12-pg., 2023-05-31.

Resumo

Indocyanine green (ICG) is the only near-infrared (NIR) dye approved for clinical use. Despite its versatility in photonic applications and potential for photothermal therapy, its photobleaching hinders its application. Here we discovered a nanostructure of dimeric ICG (Nano-dICG) generated by using ICG to stabilize nanoemulsions, after which ICG enabled complete dimerization on the nanoemulsion shell, followed by J-aggregation of ICG-dimer, resulting in a narrow, red-shifted (780 nm -> 894 nm) and intense (approximate to 2-fold) absorbance. Compared to ICG, Nano-dICG demonstrated superior photothermal conversion (2-fold higher), significantly reduced photodegradation (-9.6 % vs. -46.3 %), and undiminished photothermal effect (7 vs. 2 cycles) under repeated irradiations, in addition to excellent colloidal and structural stabilities. Following intravenous injection, Nano-dICG enabled real-time tracking of its delivery to mouse tumors within 24 h by photoacoustic imaging at NIR wavelength (890 nm) distinct from the endogenous signal to guide effective photothermal therapy. The unprecedented finding of nanostructure-driven ICG dimerization leads to an ultra-stable phototheranostic platform. (AU)

• Processo FAPESP: 16/14033-6 - Estudos básicos da combinação dos efeitos fototérmico e fotodinâmico na aplicação de uma nova modalidade para o tratamento do Câncer
• Beneficiário: Hilde Harb Buzzá
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/07276-1 - CEPOF - Centro de Pesquisa em Óptica e Fotônica
• Beneficiário: Vanderlei Salvador Bagnato
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 14/50857-8 - INCT 2014 - de Óptica Básica e Aplicada às Ciências da Vida
• Beneficiário: Vanderlei Salvador Bagnato
• Modalidade de apoio: Auxílio à Pesquisa - Temático