کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
877582 911035 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multifunctional nanoplatforms for fluorescence imaging and photodynamic therapy developed by post-loading photosensitizer and fluorophore to polyacrylamide nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
پیش نمایش صفحه اول مقاله
Multifunctional nanoplatforms for fluorescence imaging and photodynamic therapy developed by post-loading photosensitizer and fluorophore to polyacrylamide nanoparticles
چکیده انگلیسی

We report a novel post-loading approach for constructing a multifunctional biodegradable polyacrylamide (PAA) nanoplatform for tumor-imaging (fluorescence) and photodynamic therapy (PDT). This approach provides an opportunity to post-load the imaging and therapeutic agents at desired concentrations. Among the PAA nanoparticles, a formulation containing the photosensitizer, HPPH [3-(1′-hexyloxyethyl)pyropheophorbide-a], and the cyanine dye in a ratio of 2:1 minimized the undesirable quenching of the HPPH electronic excitation energy because of energy migration within the nanoparticles and/or Förster (fluorescence) resonance energy transfer (FRET) between HPPH and cyanine dye. An excellent tumor-imaging (NIR fluorescence) and phototherapeutic efficacy of the nanoconstruct formulation is demonstrated. Under similar treatment parameters the HPPH in 1% Tween 80/5% aqueous dextrose formulation was less effective than the nanoconstruct containing HPPH and cyanine dye in a ratio of 2 to 1. This is the first example showing the use of the post-loading approach in developing a nanoconstructs for tumor-imaging and therapy.From the Clinical EditorFluorescence imaging is a rapidly evolving and relatively high-throughput tool currently only utilized in preclinical imaging. The authors of this work demonstrate a tumor-specific florescence imaging nanoplatform that enables not only imaging, but photodynamic therapy as well.

Graphical AbstractLong wavelength photosensitizer (PS) and NIR cyanine dye (CD) were post-loaded to PAA NPs in variable ratios. Among all the preparations, the nanoplatform containing the PS and CD in a ratio of two to one (2:1) showed the best tumor-imaging (fluorescence) and PDT efficacy (six of ten mice [BALB/c mice bearing Colon 26 tumors] were tumor free on day 60). Under similar treatment parameters the PS (HPPH) in 1% Tween 80/5% aqueous dextrose formulation was 20% less effective.Figure optionsDownload high-quality image (66 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nanomedicine: Nanotechnology, Biology and Medicine - Volume 8, Issue 6, August 2012, Pages 941–950
نویسندگان
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