Cited by 594Advanced Polymer Synthesis and CharacterizationHydrogels: synthesis, properties, applicationsNanoparticle-Based Drug Delivery

Multi-Stimuli Sensitive Amphiphilic Block Copolymer Assemblies

Open access
Klaikherd, Akamol, Nagamani, Chikkannagari, Thayumanavan, S.·2009·Journal of the American Chemical Society

Abstract

Stimuli-responsive polymers are arguably the most widely considered systems for a variety of applications in biomedical arena. We report here a novel triple stimuli sensitive block copolymer assembly that responds to changes in temperature, pH and redox potential. Our block copolymer design constitutes an acid-sensitive THP-protected HEMA as the hydrophobic part and a temperature-sensitive PNIPAM as the hydrophilic part with an intervening disulfide bond. The micellar properties and the release kinetics of the encapsulated guest molecule in response to one stimulus as well as combinations of stimuli have been evaluated. Responsiveness to combination of stimuli not only allows for fine-tuning the guest molecule release kinetics, but also provides the possibility of achieving location-specific delivery.

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Crossref · 10.1021/ja809475a

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94 of 94 references verified0 citation errors · 0 not checkable

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  • The temperature-sensitive hydrophilic part of nanomicelles is turned to hydrophobic above the low critical solution temperature that transfers the polymer to insoluble in water state which, in turn, leads to the assembly.

    “the temperature-sensitive hydrophilic part of nanomicelles is turned to hydrophobic above the low critical solution temperature that transfers the polymer to insoluble in water state which, in turn, leads to the assembly.”

    From Recent Advances in Nanomicelles Delivery Systems. (2020) · cites this paper as [217]

    The Summary says that above the LCST, the hydrophilic block becomes hydrophobic and the polymer becomes insoluble in water, but this results in “no assembly,” not assembly. The Results and Discussion section on thermosensitive behavior likewise reports precipitation on heating. (LLM, conf=0.95)

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  • The design of multi stimuli-responsive nanomicelles sensitive to redox potential, pH, and temperature was reported recently.

    “For example, the design of multi stimuli-responsive nanomicelles sensitive to redox potential, pH, and temperature was reported recently [217].”

    From Recent Advances in Nanomicelles Delivery Systems. (2020) · cites this paper as [217]

  • The hydrophobic part of the structure tetrahydropyran-protected 2-hydroxyethyl methacrylate aimed to respond acidity change, while the hydrophilic part provided by pNIPAM is temperature sensitive and with redox-potential sensitive disulfide bond between them.

    “The hydrophobic part of the structure tetrahydropyran-protected 2-hydroxyethyl methacrylate aimed to respond acidity change, while the hydrophilic part provided by pNIPAM is temperature sensitive and with redox-potential sensitive disulfide bond between them.”

    From Recent Advances in Nanomicelles Delivery Systems. (2020) · cites this paper as [217]

  • The pH decrease converts acid-sensitive hydrophobic part to hydrophilic and thereby inhibits the assembly.

    “The pH decrease, on the other hand, converts acid-sensitive hydrophobic part to hydrophilic and thereby inhibits the assembly.”

    From Recent Advances in Nanomicelles Delivery Systems. (2020) · cites this paper as [217]

  • Reducing disulfide bonds in such an environment results in the decomposition of nanomicelles.

    “Finally, reducing disulfide bonds in such an environment results in the decomposition of nanomicelles [217].”

    From Recent Advances in Nanomicelles Delivery Systems. (2020) · cites this paper as [217]

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Cites

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Research works printed but not linked: 4

  1. [3](a) Okano T Bae YH Jacobs H Kim SW J. Controlled Release 1990 11 255 265 (b) Hoffman AS J. Controlled Release 1987 6 297 305 (c) Brønsdsted H Kopecek J Biomaterials 1991 12 584 592 1772957 (d) Yeh P Kopečková P Kopeček J J. Polym. Sci., Polym. Chem 1994 32 1627 1637 (e) Ganta S Devalapally H Shahiwala A Amiji M J. Controlled Release 2008 126 187 204 18261822 (f) Kataoka K Harada A Nagasaki Y Adv. Drug Delivery Rev 2001 47 113 131 11251249 (g) Rapoport N Prog. Polym. Sci 2007 32 962 990
  2. [11](a) Mariagnanam VM Zhang L Bergbreiter DE Adv. Mater 1995 7 69 71 (b) Komori K Matsui H Tatsuma T Bioelectrochemistry 2005 65 129 134 15713563
  3. [12](a) Lee C-K Su W-D Sep. Sci. Technol 1999 34 3267 3277 (b) Li J-L Bai R Chen B-H Langmuir 2004 20 6068 6070 16459631
  4. [21]Ostergaard H Tachibana C Winther JR J. Cell Biol 2004 166 337 345 15277542 PMC2172265

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Authors
Klaikherd, A., Nagamani, C., & Thayumanavan, S.
Affiliations
University of Massachusetts Amherst (US)
Corresponding author
Thayumanavan, S.
Venue
Journal of the American Chemical Society
Published
2009-03-16
Volume
131
Issue
13
Pages
4830-4838
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W1992741184
Cited by
594
References
94
Citations by year
2026: 9 · 2025: 15 · 2024: 15 · 2023: 10 · 2022: 10 · 2021: 26 · 2020: 24 · 2019: 35 · 2018: 32 · 2017: 54 · 2016: 45 · 2015: 51 · 2014: 65 · 2013: 49 · 2012: 57
FWCI
24.80
Type
journal article
Language
en
Open access
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • ScholarWorks@UMassAmherst (University of Massachusetts Amherst) (submittedVersion)
  • Scholarworks (University of Massachusetts Amherst) (submittedVersion)
Funders
National Institute of General Medical Sciences (R01GM065255)
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Hydrogels: synthesis, properties, applications
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
Keywords
stimuli-responsive polymers, amphiphilic block copolymers, thermoresponsive polymers, pH-responsive polymers, redox-responsive polymers, poly(N-isopropylacrylamide), HEMA, disulfide bonds, micelles, controlled release kinetics
MeSH terms
Acids, Acrylamides, Acrylic Resins, Drug Carriers, Hydrogen-Ion Concentration, Kinetics, Methacrylates, Micelles, Magnetic Resonance Spectroscopy, Oxazines, Oxidation-Reduction, Polymers, Pyrans, Temperature, Water, Hydrophobic and Hydrophilic Interactions

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