Cited by 78Surfactants and Colloidal SystemsAdvanced Polymer Synthesis and CharacterizationNanoparticle-Based Drug Delivery

The DOI matches its Crossref record; 41 of the 41 references it cites were found in a registry or an index.

Encapsulation of a Hydrophobic Drug into a Polymer-Micelle Core Explored with Synchrotron SAXS

Abstract

Synchrotron small-angle X-ray scattering (SAXS) at the SPring-8 40B2 and 45XU beamlines was carried out on aqueous solutions of (PEG-P(Asp(Bzl))): partially benzyl-esterified poly(ethylene glycol)-block-poly(aspartic acid) with LE540 loaded up to 8.3 wt %, where LE540 is a very hydrophobic retinoid antagonist drug. The scattering profiles showed characteristic features for core-shell spherical micelles, confirming that P(Asp(Bzl)) forms a hydrophobic core and PEG forms a hydrophilic shell. Before the addition of LE540, a diffraction peak was observed around q = 4 nm(-1), where q is the magnitude of the scattering vector. This peak can be attributed to ordering between alpha-helices made of P(Asp(Bzl)), the so-called nonspecific hexatic arrangement. The P(Asp(Bzl)) helices disappeared as LE540 was added. This result can be interpreted by assuming a uniform distribution of LE540 in the core. By use of a core-shell spherical micelle model, the SAXS data could be well fitted for all of the samples. The analysis indicated that the core radius increases sigmoidally from 5.9 to 6.9 nm upon addition of LE540 whereas the shell radius stayed at 12.5-12.8 nm. The aggregation number that is the average number of PEG-P(Asp(Bzl))'s consisting of one micelle slightly increased from 145 to 182.

Overview

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Crossref · 10.1021/la904355p

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41 of 41 references verified0 citation errors · 0 not checkable

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  1. Nishiyama N., 2003, Cancer Res., 63, 8977

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Metadata

Authors
Akiba, I., Terada, N., Hashida, S., Sakurai, K., Sato, T., Shiraishi, K., Yokoyama, M., Masunaga, H., Ogawa, H., Ito, K., & Yagi, N.
Affiliations
  • The University of Kitakyushu (JP)
  • Jikei University School of Medicine (JP)
  • SPring-8 (JP)
Corresponding author
  • Akiba, Isamu
  • Sakurai, Kazuo
Venue
Langmuir
Published
2010-04-02
Volume
26
Issue
10
Pages
7544-7551
ISSN
  • 0743-7463 (ISSN-L)
  • 1520-5827
OpenAlex
W2087777627
Cited by
76
References
41
Citations by year
2026: 1 · 2025: 2 · 2024: 4 · 2023: 4 · 2022: 1 · 2021: 7 · 2020: 6 · 2019: 7 · 2018: 4 · 2017: 6 · 2016: 6 · 2015: 6 · 2014: 4 · 2013: 5 · 2012: 5
FWCI
2.85
Type
journal article
Language
en
Open access
closed
Locations
  • Langmuir (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Surfactants and Colloidal Systems
  • Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
Keywords
polymeric micelles, drug encapsulation, core-shell micelles, aggregation number
MeSH terms
Dibenzazepines, Micelles, Polyethylene Glycols, Surface Properties, X-Ray Diffraction, Molecular Structure, Synchrotrons, Scattering, Small Angle, Hydrophobic and Hydrophilic Interactions

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