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具有Janus结构的多糖基抗菌纳米复合水凝胶用于治疗拔牙窝感染 被引量:1
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作者 史泰龙 熊彦华 +6 位作者 宋炜卓 孙美州 吴若楠 李杨 孙强 段顺 徐福建 《Science China Materials》 SCIE EI CAS CSCD 2024年第8期2550-2557,共8页
拔牙窝位点保存需要特殊的组织工程支架.在本研究中,我们采用渗透交联的方法开发了一种具有抵抗成纤维细胞入侵、牙槽骨保存和抗菌的多功能Janus结构复合水凝胶.通过将氧化的海藻酸钠溶液渗透到含有羧甲基壳聚糖的高黏性纳米羟基磷灰石... 拔牙窝位点保存需要特殊的组织工程支架.在本研究中,我们采用渗透交联的方法开发了一种具有抵抗成纤维细胞入侵、牙槽骨保存和抗菌的多功能Janus结构复合水凝胶.通过将氧化的海藻酸钠溶液渗透到含有羧甲基壳聚糖的高黏性纳米羟基磷灰石悬浮液中来构建水凝胶.通过这个过程制备出的Janus结构水凝胶,其致密、光滑的上表面对成纤维细胞显示出显著的屏障功能,而其疏松、多孔的下表面可以在纳米羟基磷灰石的作用下进行有效的牙槽骨保存,并且在水凝胶中加入了一种抗菌剂甲硝唑,有效抑制了牙周炎相关细菌.其中最优组CAH4M水凝胶对变形链球菌和牙龈卟啉单胞菌的抗菌效率分别为82%和93%,溶血率小于5%,没有明显的细胞毒性. 展开更多
关键词 牙槽骨 拔牙窝 成纤维细胞 溶血率 牙龈卟啉单胞菌 变形链球菌 海藻酸钠溶液 屏障功能
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Reduction-responsive nucleic acid nanocarrier-mediated miR-22 inhibition of PI3K/AKT pathway for the treatment of patient-derived tumor xenograft osteosarcoma 被引量:1
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作者 Dafu Chen Chengyue Lei +11 位作者 Weifeng Liu Meiyu Shao meizhou sun Jianxun Guo Jingjing Cao Jing-Jun Nie Peng Luo Yuwen Luo Bingran Yu Renxian Wang Shun Duan Fu-Jian Xu 《Bioactive Materials》 SCIE CSCD 2023年第10期376-385,共10页
miRNAs are important regulators of gene expression and play key roles in the development of cancer, including osteosarcoma. During the development of osteosarcoma, the expression of miR-22 is significantly downregulat... miRNAs are important regulators of gene expression and play key roles in the development of cancer, including osteosarcoma. During the development of osteosarcoma, the expression of miR-22 is significantly downregulated, making miR-22 as a promising therapeutic target against osteosarcoma. To design and fabricate efficient delivery carriers of miR-22 into osteosarcoma cells, a hydroxyl-rich reduction-responsive cationic polymeric nanoparticle, TGIC-CA (TC), was developed in this work, which also enhanced the therapeutic effects of Volasertib on osteosarcoma. TC was prepared by the ring-opening reaction between amino and epoxy groups by one-pot method, which had the good complexing ability with nucleic acids, reduction-responsive degradability and gene transfection performance. TC/miR-22 combined with volasertib could inhibit proliferation, migration and promote apoptosis of osteosarcoma cells in vitro. The anti-tumor mechanisms were revealed as TC/ miR-22 and volasertib could inhibit the PI3K/Akt signaling pathway synergistically. Furthermore, this strategy showed outstanding tumor suppression performance in animal models of orthotopic osteosarcoma, especially in patient-derived chemo-resistant and chemo-intolerant patient-derived xenograft (PDX) models, which reduced the risk of tumor lung metastasis and overcame drug resistance. Therefore, it has great potential for efficient treatment of metastasis and drug resistance of osteosarcoma by the strategy of localized, sustained delivery of miR-22 using the cationic nanocarriers combined with non-traditional chemotherapy drugs. 展开更多
关键词 Nucleic acid delivery Nanoparticle Gene therapy OSTEOSARCOMA Responsive Patient-Derived Xenograft(PDX)
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