Despite the synergy of immune checkpoint blockade(ICB) therapy and photodynamic therapy(PDT) holds great promise as countermeasures against breast cancer, exploring long-term or flexible short-time therapeutic strateg...Despite the synergy of immune checkpoint blockade(ICB) therapy and photodynamic therapy(PDT) holds great promise as countermeasures against breast cancer, exploring long-term or flexible short-time therapeutic strategies in “cold” tumors remains a great challenge. Here, we present a polyunsaturated fatty acid-doped liposomal hydrogel Lp(DHA)@CP Gel loaded with photosensitizer chlorin e6(Ce6) and programmed death-ligand 1 antibody(αPD-L1) for flexible local photoimmunotherapy with merely singledosed administration. The presence of polyunsaturated fatty acid(docosahexaenoic acid, DHA) doped in particle membrane endows liposomes with flexibly reactive oxygen species(ROS)-responsive release capability, which was attributed to the presence of abundant unsaturated groups. The αPD-L1 was repeatedly induced to in situ release in response to the PDT under photo-exposure. The immunogenic cell death(ICD) effect of PDT evoked “cold” breast tumor to “hot” one, and then assisted the cascade releasedαPD-L1 to synergistically boost the immunotherapy. After a single dose of peritumoral administration of Lp(DHA)@CP Gel, the on-demand treatment can maximize patient compliance and safety by adjusting therapeutic behaviors via a photo on-off switch. This work presents a flexible medication platform,showing promise in improving the objective response rate of ICB therapy and minimizing its systemic toxicity.展开更多
有柄石韦(Pyrrosia petiolosa)是水龙骨科石韦属植物,也是一种常用的中药材,被广泛用于治疗肾盂肾炎、慢性支气管炎、尿路结石等病症。通过检索中国知网、PubMed、Web of Science等数据库,查找国内外已经发表的有柄石韦相关文献,对有柄...有柄石韦(Pyrrosia petiolosa)是水龙骨科石韦属植物,也是一种常用的中药材,被广泛用于治疗肾盂肾炎、慢性支气管炎、尿路结石等病症。通过检索中国知网、PubMed、Web of Science等数据库,查找国内外已经发表的有柄石韦相关文献,对有柄石韦近四十年的化学成分和生物活性研究进行系统地梳理、归纳,发现目前已从有柄石韦中分离出超过100种化合物,包括黄酮类、三萜类、木脂素类、酚类和其他类等。有柄石韦提取物具有显著的生物活性,包括抗氧化、抗菌、抗炎、利尿、促进伤口愈合、抗肾结石、抗糖尿病等。可为有柄石韦药用资源后续深入系统地研究和临床开发提供科学依据和理论参考。展开更多
基金supported by the Natural Science Foundation of Guangdong Province (No.2023A1515030291)Science and Technology Program of Guangzhou (No.202201011130280065)+1 种基金National Natural Science Foundation of China (No.82172079)Special Fund of Foshan Climbing Peak Plan (No.2020B018)。
文摘Despite the synergy of immune checkpoint blockade(ICB) therapy and photodynamic therapy(PDT) holds great promise as countermeasures against breast cancer, exploring long-term or flexible short-time therapeutic strategies in “cold” tumors remains a great challenge. Here, we present a polyunsaturated fatty acid-doped liposomal hydrogel Lp(DHA)@CP Gel loaded with photosensitizer chlorin e6(Ce6) and programmed death-ligand 1 antibody(αPD-L1) for flexible local photoimmunotherapy with merely singledosed administration. The presence of polyunsaturated fatty acid(docosahexaenoic acid, DHA) doped in particle membrane endows liposomes with flexibly reactive oxygen species(ROS)-responsive release capability, which was attributed to the presence of abundant unsaturated groups. The αPD-L1 was repeatedly induced to in situ release in response to the PDT under photo-exposure. The immunogenic cell death(ICD) effect of PDT evoked “cold” breast tumor to “hot” one, and then assisted the cascade releasedαPD-L1 to synergistically boost the immunotherapy. After a single dose of peritumoral administration of Lp(DHA)@CP Gel, the on-demand treatment can maximize patient compliance and safety by adjusting therapeutic behaviors via a photo on-off switch. This work presents a flexible medication platform,showing promise in improving the objective response rate of ICB therapy and minimizing its systemic toxicity.
文摘有柄石韦(Pyrrosia petiolosa)是水龙骨科石韦属植物,也是一种常用的中药材,被广泛用于治疗肾盂肾炎、慢性支气管炎、尿路结石等病症。通过检索中国知网、PubMed、Web of Science等数据库,查找国内外已经发表的有柄石韦相关文献,对有柄石韦近四十年的化学成分和生物活性研究进行系统地梳理、归纳,发现目前已从有柄石韦中分离出超过100种化合物,包括黄酮类、三萜类、木脂素类、酚类和其他类等。有柄石韦提取物具有显著的生物活性,包括抗氧化、抗菌、抗炎、利尿、促进伤口愈合、抗肾结石、抗糖尿病等。可为有柄石韦药用资源后续深入系统地研究和临床开发提供科学依据和理论参考。
