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Acetal-Functionalized Pillar[5]arene: A pH-Responsive and Versatile Nanomaterial for the Delivery of Chemotherapeutic Agents

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journal contribution
posted on 18.03.2020, 12:04 by Shang Lan, Yamin Liu, Kejia Shi, Da Ma
Acetal-functionalized pillar­[5]­arene (Ac-PA­[5]) was prepared as a pH-responsive biomaterial. This biomaterial could be fabricated into nanoparticles with a narrow size distribution by an emulsion protocol. PA[5]-based nanoparticles were used to deliver anti-tumor drugs (paclitaxel and doxorubicin) in vitro. PA[5]-based nanoparticles were discovered to be a versatile drug delivery system (DDS) to incorporate a fluorescent dye (fluorescein) or a targeting group (folic acid) via host–guest interactions. The resulting DDS could be used for the purpose of bioimaging or targeted delivery. Acetal-functionalization renders the system acid-labile to release encapsulated cargo during cell internalization, which is confirmed by confocal laser scanning microscopy (CLSM). A folic-acid-modified DDS shows a 5.1-fold enhancement in bioactivity in vitro due to the targeting effect. This DDS is a platform to conveniently integrate multiple functions.

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