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Thümmler JF, Maragani R, Schmitt FJ, Tang G, Rahmanlou SM, Laufer J, Lucas H, Mäder K, Binder WH. Thermoresponsive swelling of photoacoustic single-chain nanoparticles. Chem Commun (Camb) 2023; 59:11373-11376. [PMID: 37665625 DOI: 10.1039/d3cc03851c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
NIR-fluorescent LCST-type single-chain nanoparticles (SCNPs) change their photophysical behaviour upon heating, caused by depletion of water from the swollen SCNP interiors. This thermoresponsive effect leads to a fluctuating photoacoustic (PA) signal which can be used as a contrast mechanism for PA imaging.
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Affiliation(s)
- Justus F Thümmler
- Institute of Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle D-06120, Germany.
| | - Ramesh Maragani
- Institute of Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle D-06120, Germany.
| | - Franz-Josef Schmitt
- Institute of Physics, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 3, Halle D-06120, Germany
| | - Guo Tang
- Institute of Physics, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 3, Halle D-06120, Germany
| | - Samira Mahmoudi Rahmanlou
- Institute of Physics, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 3, Halle D-06120, Germany
| | - Jan Laufer
- Institute of Physics, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 3, Halle D-06120, Germany
| | - Henrike Lucas
- Institute of Pharmacy, Faculty of Natural Sciences I, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, Halle D-06120, Germany
| | - Karsten Mäder
- Institute of Pharmacy, Faculty of Natural Sciences I, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, Halle D-06120, Germany
| | - Wolfgang H Binder
- Institute of Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle D-06120, Germany.
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Thümmler JF, Roos AH, Krüger J, Hinderberger D, Schmitt F, Tang G, Golmohamadi FG, Laufer J, Binder WH. Tuning the Internal Compartmentation of Single‐Chain Nanoparticles as Fluorescent Contrast Agents. Macromol Rapid Commun 2023. [DOI: 10.1002/marc.202370007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Thümmler JF, Roos AH, Krüger J, Hinderberger D, Schmitt FJ, Tang G, Golmohamadi FG, Laufer J, Binder WH. Tuning the Internal Compartmentation of Single-Chain Nanoparticles as Fluorescent Contrast Agents. Macromol Rapid Commun 2023; 44:e2200618. [PMID: 35973086 DOI: 10.1002/marc.202200618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/05/2022] [Indexed: 01/26/2023]
Abstract
Controlling the internal structures of single-chain nanoparticles (SCNPs) is an important factor for their targeted chemical design and synthesis, especially in view of nanosized compartments presenting different local environments as a main feature to control functionality. We here design SCNPs bearing near-infrared fluorescent dyes embedded in hydrophobic compartments for use as contrast agents in pump-probe photoacoustic (PA) imaging, displaying improved properties by the location of the dye in the hydrophobic particle core. Compartment formation is controlled via single-chain collapse and subsequent crosslinking of an amphiphilic polymer using external crosslinkers in reaction media of adjustable polarity. Different SCNPs with hydrodynamic diameters of 6-12 nm bearing adjustable label densities are synthesized. It is found that the specific conditions for single-chain collapse have a major impact on the formation of the desired core-shell structure, in turn adjusting the internal nanocompartments together with the formation of excitonic dye couples, which in turn increase their fluorescence lifetime and PA signal generation. SCNPs with the dye molecules accumulate at the core also show a nonlinear PA response as a function of pulse energy-a property that can be exploited as a contrast mechanism in molecular PA tomography.
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Affiliation(s)
- Justus F Thümmler
- Macromolecular Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle, Germany
| | - Andreas H Roos
- Physical Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle, Germany
| | - Jana Krüger
- Physical Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle, Germany
| | - Dariush Hinderberger
- Physical Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle, Germany
| | - Franz-Josef Schmitt
- Institute of Physics, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 3, D-06120, Halle, Germany
| | - Guo Tang
- Institute of Physics, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 3, D-06120, Halle, Germany
| | - Farzin Ghane Golmohamadi
- Institute of Physics, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 3, D-06120, Halle, Germany
| | - Jan Laufer
- Institute of Physics, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 3, D-06120, Halle, Germany
| | - Wolfgang H Binder
- Macromolecular Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle, Germany
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Hilgeroth PS, Thümmler JF, Binder WH. 3D Printing of Triamcinolone Acetonide in Triblock Copolymers of Styrene–Isobutylene–Styrene as a Slow-Release System. Polymers (Basel) 2022; 14:polym14183742. [PMID: 36145892 PMCID: PMC9504042 DOI: 10.3390/polym14183742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/29/2022] Open
Abstract
Additive manufacturing has a wide range of applications and has opened up new methods of drug formulation, in turn achieving attention in medicine. We prepared styrene–isobutylene–styrene triblock copolymers (SIBS; Mn = 10 kDa–25 kDa, PDI 1,3–1,6) as a drug carrier for triamcinolone acetonide (TA), further processed by fused deposition modeling to create a solid drug release system displaying improved bioavailability and applicability. Living carbocationic polymerization was used to exert control over block length and polymeric architecture. Thermorheological properties of the SIBS polymer (22.3 kDa, 38 wt % S) were adjusted to the printability of SIBS/TA mixtures (1–5% of TA), generating an effective release system effective for more than 60 days. Continuous drug release and morphological investigations were conducted to probe the influence of the 3D printing process on the drug release, enabling 3D printing as a formulation method for a slow-release system of Triamcinolone.
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