Injectable Hydrogel for Synergetic Low Dose Radiotherapy, Chemodynamic Therapy and Photothermal Therapy.

Injectable Hydrogel for Synergetic Low Dose Radiotherapy, Chemodynamic Therapy and Photothermal Therapy.
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DOI:
10.3389/fbioe.2021.757428
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发表时间:
2021
影响因子:
5.7
通讯作者:
Quan H
Quan H
中科院分区:
工程技术2区
文献类型:
--
作者:
Chen M;Wang Z;Suo W;Bao Z;Quan H

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高剂量放疗与耐药诱导有关,因此迫切需要高选择性和可控的放射增敏剂。为了解决这个问题,我们开发了一种基于fega的可注射水凝胶系统(FH),可以与低剂量辐射结合使用。我们的FH可以通过肿瘤内注射将FeGA直接输送到肿瘤部位,这是一个基于储存库的系统来保存FeGA。FeGA光热特性使FH在激光照射下稳定溶解,同时FeGA与细胞内大量H2O2反应产生对线粒体具有高毒性的OH (Fenton反应),使细胞失活,降低放疗抵抗。体内和体外研究表明,FH和NIR照射联合RT (2Gy)可显著降低肿瘤增殖,无炎症等副作用。综上所述,本研究首次实现了原位化疗(CDT)与光热治疗(PTT)的联合治疗,低剂量放射联合治疗可获得最佳治疗效果,从而拓展了基于fega的肿瘤治疗的前景。
Higher doses of radiotherapy (RT) are associated with resistance induction, therefore highly selective and controllable radiosensitizers are urgently needed. To address this issue, we developed a FeGA-based injectable hydrogel system (FH) that can be used in combination with low-dose radiation. Our FH can deliver FeGA directly to the tumor site via intratumoral injection, where it is a reservoir-based system to conserve FeGA. The photothermal properties of FeGA steadily dissolve FH under laser irradiation, and, simultaneously, FeGA reacts with a large amount of H2O2 in the cell to produce OH (Fenton reaction) which is highly toxic to mitochondria, rendering the cell inactive and reducing radiotherapy resistance. In vivo and in vitro studies suggest that combining the FH and NIR irradiation with RT (2Gy) can significantly reduce tumor proliferation without side effects such as inflammation. To conclude, this is the first study to achieve combined chemodynamic therapy (CDT) and photothermal therapy (PTT) in situ treatment, and the best therapeutic effect can be obtained with a low-dose radiation combination, thus expanding the prospects of FeGA-based tumor therapy.
一种靶向线粒体的纳米放射增敏剂激活活性氧爆发以增强放射治疗
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