Facile Fabrication of NIR-Responsive Alginate/CMC Hydrogels Derived through IEDDA Click Chemistry for Photothermal-Photodynamic Anti-Tumor Therapy

Novel chemically cross-linked hydrogels derived from carboxymethyl cellulose (CMC) and alginate (Alg) were prepared through the utilization of the norbornene (Nb)-methyl tetrazine (mTz) click reaction. The hydrogels were designed to generate reactive oxygen species (ROS) from an NIR dye, indocyanine...

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Published in:Gels 2023-12, Vol.9 (12), p.961
Main Authors: Rizwan, Ali, Ali, Israr, Jo, Sung-Han, Vu, Trung Thang, Gal, Yeong-Soon, Kim, Yong Hyun, Park, Sang-Hyug, Lim, Kwon Taek
Format: Article
Language:English
Subjects:
alginate-methyl tetrazine
Alginates
Biocompatibility
Biopolymers
Cancer therapies
Carboxymethyl cellulose
carboxymethyl cellulose-norbornene
Chemical reactions
Chemical synthesis
Crosslinking
Hydrocarbons
Hydrogels
indocyanine green
Irradiation
Mechanical properties
Near infrared radiation
NIR-responsive hydrogels
Tumors
Viscoelasticity
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cited_by cdi_FETCH-LOGICAL-c420t-a3b970dad1f0d421ccc6cd4e8a8f6427eb03945302b9796054574ce72f8d1d5e3
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container_end_page
container_issue 12
container_start_page 961
container_title Gels
container_volume 9
creator Rizwan, Ali
Ali, Israr
Jo, Sung-Han
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Park, Sang-Hyug
Lim, Kwon Taek
description Novel chemically cross-linked hydrogels derived from carboxymethyl cellulose (CMC) and alginate (Alg) were prepared through the utilization of the norbornene (Nb)-methyl tetrazine (mTz) click reaction. The hydrogels were designed to generate reactive oxygen species (ROS) from an NIR dye, indocyanine green (ICG), for combined photothermal and photodynamic therapy (PTT/PDT). The cross-linking reaction between Nb and mTz moieties occurred via an inverse electron-demand Diels-Alder chemistry under physiological conditions avoiding the need for a catalyst. The resulting hydrogels exhibited viscoelastic properties (G' ~ 492-270 Pa) and high porosity. The hydrogels were found to be injectable with tunable mechanical characteristics. The ROS production from the ICG-encapsulated hydrogels was confirmed by DPBF assays, indicating a photodynamic effect (with NIR irradiation at 1-2 W for 5-15 min). The temperature of the ICG-loaded hydrogels also increased upon the NIR irradiation to eradicate tumor cells photothermally. In vitro cytocompatibility assessments revealed the non-toxic nature of CMC-Nb and Alg-mTz towards HEK-293 cells. Furthermore, the ICG-loaded hydrogels effectively inhibited the metabolic activity of Hela cells after NIR exposure.
doi_str_mv 10.3390/gels9120961
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subjects alginate-methyl tetrazine
Alginates
Biocompatibility
Biopolymers
Cancer therapies
Carboxymethyl cellulose
carboxymethyl cellulose-norbornene
Chemical reactions
Chemical synthesis
Crosslinking
Hydrocarbons
Hydrogels
indocyanine green
Irradiation
Mechanical properties
Near infrared radiation
NIR-responsive hydrogels
Tumors
Viscoelasticity
title Facile Fabrication of NIR-Responsive Alginate/CMC Hydrogels Derived through IEDDA Click Chemistry for Photothermal-Photodynamic Anti-Tumor Therapy
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