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The pH-controlled nanoparticles size of polydopamine for anti-cancer drug delivery

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Abstract

A facile method was used to prepare polydopamine (PDA) nanoparticles. The effect of the initial pH of the dopamine solution on the formation kinetics, chemical structure, and biocompatibility of PDA nanoparticles was evaluated. Additionally, camptothecin (CPT) was chosen as a model anti-cancer drug with which to evaluate the efficiency of drug loading and release behavior of PDA nanoparticles. The results indicated that the size and yield of PDA nanoparticles, consisting of quinoid and indoline species, were closely related to the pH value of the precursor solution. At a reaction time of 6 h, the uniform particle sizes of PDA nanoparticles were ~400, 250, 150, and 75 nm in solutions with initial pH values of 7.5, 8, 8.5, and 9, respectively, and with corresponding yields of 3, 7, 20, and 34 %. The amounts of CPT loaded in 1 mg of PDA nanoparticles synthesized at pH values of 7.5, 8, 8.5, and 9 for 6 h were 10.85, 11.81, 10.17, and 6.19 μg, respectively. After the first day, 19, 20, 25, and 36 % of the CPT was released from PDA nanoparticles synthesized at pH values of 7.5, 8, 8.5, and 9, respectively, depending on the particle size. The PDA nanoparticles had excellent haemocompatibility: there was no apparent hemolysis, and they did not cause acute toxicity in A549 and HeLa cells. The loading of CPT into PDA nanoparticles significantly reduced the viability of A549 and HeLa cells, comparable to free CPT. It can be concluded that the PDA nanoparticles prepared by our facile method are potential carriers of anticancer drugs for cancer therapy.

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Authors and Affiliations

  1. Institute of Oral Science, Chung Shan Medical University, No. 110, Sec. 1, Jianguo North Road, Taichung, 402, Taiwan

    Chia-Che Ho & Shinn-Jyh Ding

  2. Department of Dentistry, Chung Shan Medical University Hospital, Taichung, 402, Taiwan

    Shinn-Jyh Ding

  3. School of Dentistry, Chung Shan Medical University, Taichung, 402, Taiwan

    Shinn-Jyh Ding

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  1. Chia-Che Ho
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Correspondence to Shinn-Jyh Ding.

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Ho, CC., Ding, SJ. The pH-controlled nanoparticles size of polydopamine for anti-cancer drug delivery. J Mater Sci: Mater Med 24, 2381–2390 (2013). https://doi.org/10.1007/s10856-013-4994-2

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  • DOI: https://doi.org/10.1007/s10856-013-4994-2

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