In Vitro and In Vivo Studies on HPMA-Based Polymeric Micelles Loaded with Curcumin
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Abstract Curcumin-loaded polymeric micelles composed of poly(ethylene glycol)-b-poly(N-2-benzoyloxypropyl methacrylamide) (mPEG-b-p(HPMA-Bz)) were prepared to solubilize and improve the pharmacokinetics of curcumin. Curcumin-loaded micelles were prepared by a nanoprecipitation method using mPEG5kDa-b-p(HPMA-Bz) copolymers with varying molecular weight of the hydrophobic block (5.2, 10.0, and 17.1 kDa). At equal curcumin loading, micelles composed of mPEG5kDa-b-p(HPMA-Bz)17.1kDa showed better curcumin retention in both phosphate-buffered saline (PBS) and plasma at 37 °C than micelles based on block copolymers with smaller hydrophobic blocks. No change in micelle size was observed during 24 h incubation in plasma using asymmetrical flow field-flow fractionation (AF4), attesting to particle stability. However, 22–49% of the curcumin loading was released from the micelles during 24 h from formulations with the highest to the lowest molecular weight p(HPMA-Bz), respectively, in plasma. AF4 analysis further showed that the released curcumin was subsequently solubilized by albumin. In vitro analyses revealed that the curcumin-loaded mPEG5kDa-b-p(HPMA-Bz)17.1kDa micelles were internalized by different types of cancer cells, resulting in curcumin-induced cell death. Intravenously administered curcumin-loaded, Cy7-labeled mPEG5kDa-b-p(HPMA-Bz)17.1kDa micelles in mice at 50 mg curcumin/kg showed a long circulation half-life for the micelles (t1/2 = 42 h), in line with the AF4 results. In contrast, the circulation time of curcumin was considerably shorter than that of the micelles (t1/2α = 0.11, t1/2β = 2.5 h) but ∼5 times longer than has been reported for free curcumin (t1/2α = 0.02 h). The faster clearance of curcumin in vivo compared to in vitro studies can be attributed to the interaction of curcumin with blood cells. Despite the excellent solubilizing effect of these micelles, no cytostatic effect was achieved in neuroblastoma-bearing mice, possibly because of the low sensitivity of the Neuro2A cells to curcumin.
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- Authors
- Bagheri, M., Fens, M. H., Kleijn, T. G., Capomaccio, R. B., Mehn, D., Krawczyk, P. M., Scutigliani, E. M., Gurinov, A., Baldus, M., van Kronenburg, N. C. H., Kok, R. J., Heger, M., van Nostrum, C. F., & Hennink, W. E.
- Affiliations
- Utrecht University (NL)
- European Commission (BE)
- Joint Research Centre (JRC) , , , ,
- Amsterdam University Medical Centers (NL)
- Utrecht University , , ,
- Corresponding author
- Hennink, Wim E.
- ORCID
- Venue
- Molecular Pharmaceutics
- Publisher
- American Chemical Society (ACS)
- Published
- 2021-01-19
- Volume
- 18
- Issue
- 3
- Pages
- 1247-1263
- ISSN
- 1543-8384 (ISSN-L)
- 1543-8392
- PMC
- PMC7927141
- OpenAlex
- W3123252613
- Cited by
- 61
- References
- 77
- Citations by year
- 2026: 8 · 2025: 15 · 2024: 10 · 2023: 11 · 2022: 12 · 2021: 4 · 2012: 1
- FWCI
- 2.93
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Molecular Pharmaceutics (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
- Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
- Pure Amsterdam UMC (submittedVersion, cc-by)
- University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion)
- Funders
- National Natural Science Foundation of China (81872220)
- KWF Kankerbestrijding (10666)
- Natural Science Foundation of Zhejiang Province (Z20H160031)
- Jiaxing Key Laboratory for Photonanomedicine and Experimental Therapeutics (NA)
- Zhejiang Province (NA)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Curcumin's Biomedical Applications
- Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advanced Drug Delivery Systems
- Keywords
- curcumin, polymeric micelles, HPMA copolymer, nanoprecipitation, drug solubilization, pharmacokinetics, albumin binding, micelle stability, circulation time, tumor cell internalization
- MeSH terms
- Acrylamides, Animals, Antineoplastic Agents, Curcumin, Drug Carriers, Drug Compounding, Humans, Methacrylates, Micelles, Particle Size, Polyesters, Polyethylene Glycols, Polymers, Cell Line, Tumor, Mice, Hydrophobic and Hydrophilic Interactions, Human Umbilical Vein Endothelial Cells, Drug Liberation
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