Due to the non-targeted release and low solubility of anti-gastric cancer agent,apatinib(Apa),a first-line drug with long-term usage in a high dosage often induces multi-drug resistance and causes serious side effects...Due to the non-targeted release and low solubility of anti-gastric cancer agent,apatinib(Apa),a first-line drug with long-term usage in a high dosage often induces multi-drug resistance and causes serious side effects.In order to avoid these drawbacks,lipid-film-coated Prussian blue nanoparticles(PB NPs)with hyaluronan(HA)modification was used for Apa loading to improve its solubility and targeting ability.Furthermore,anti-tumor compound of gamabufotalin(CS-6)was selected as a partner of Apawith reducing dosage for combinational gastric therapy.Thus,HA-Apa-Lip@PB-CS-6 NPs were constructed to synchronously transport the two drugs into tumor tissue.In vitro assay indicated that HA-Apa-Lip@PB-CS-6 NPs can synergistically inhibit proliferation and invasion/metastasis of BGC-823 cells via downregulating vascular endothelial growth factor receptor(VEGFR)and matrix metalloproteinase-9(MMP-9).In vivo assay demonstrated strongest anti-tumor growth and liver metastasis of HA-Apa-Lip@PB-CS-6 NPs administration in BGC-823 cells-bearing mice compared with other groups due to the excellent penetration in tumor tissues and outstanding synergistic effects.In summary,we have successfully developed a new nanocomplexes for synchronous Apa/CS-6 delivery and synergistic gastric cancer(GC)therapy.展开更多
三阴性乳腺癌(triple negative breast cancer,TNBC)恶性程度高,预后差,其p53基因的突变频率达80%以上。日蟾蜍它灵(gamabufotalin,CS-6)是日本蟾蜍的皮肤分泌物,有研究表明CS-6具有抗癌作用,但其对TNBC的作用和机制尚无报道。本文采用...三阴性乳腺癌(triple negative breast cancer,TNBC)恶性程度高,预后差,其p53基因的突变频率达80%以上。日蟾蜍它灵(gamabufotalin,CS-6)是日本蟾蜍的皮肤分泌物,有研究表明CS-6具有抗癌作用,但其对TNBC的作用和机制尚无报道。本文采用MTT法和细胞克隆形成实验检测了不同浓度CS-6对TNBC细胞系MDA-MB-468和MDA-MB-231细胞增殖的影响;采用Western-blot检测了CS-6在外源和内源水平对p53和热休克蛋白90(heat shock protein 90,HSP90)表达水平的影响;采用联合指数及等效线分析法考察了CS-6和HSP90的抑制剂坦螺旋霉素(tanespimycin,17-AAG)对MDA-MB-468和MDA-MB-231细胞增殖的协同作用。结果显示,CS-6明显抑制MDA-MB-468和MDA-MB-231细胞的增殖,其抑制增殖机制有可能与降解HSP90/突变p53有关;而且,CS-6和HSP90抑制剂17-AAG联合用药对抑制MDA-MB-468和MDA-MB-231细胞增殖具有协同作用。展开更多
目的建立蟾酥原浆HPLC指纹图谱及原浆中8种成分含量测定方法,对不同产地蟾酥原浆进行成分含量差异比较,同时进行质量评价。方法以乙腈-水为流动相,梯度洗脱,检测波长296 nm,体积流量1.2 m L/min,柱温30℃,进样量10μL;建立蟾酥原浆指纹...目的建立蟾酥原浆HPLC指纹图谱及原浆中8种成分含量测定方法,对不同产地蟾酥原浆进行成分含量差异比较,同时进行质量评价。方法以乙腈-水为流动相,梯度洗脱,检测波长296 nm,体积流量1.2 m L/min,柱温30℃,进样量10μL;建立蟾酥原浆指纹图谱,测定8个成分含量,对结果进行聚类分析和主成分分析。结果 18批样品指纹图谱中有12个共有峰,各样品相似度有所差异,8个成分在各自范围内线性关系良好(r2≥0.999 5),精密度、重复性RSD<0.5%,在30 h内稳定性较好(RSD<0.7%),日蟾毒它灵、沙蟾毒精、远华蟾蜍精、蟾毒它灵、华蟾毒它灵、蟾毒灵、华蟾酥毒基和脂蟾毒配基回收率平均值分别为103.7%、103.0%、102.9%、103.0%、103.9%、100.3%、103.4%、103.2%,且RSD均小于1.2%,8个成分含量测定结果及聚类分析和主成分分析结果可知不同产地原浆质量有所差异。结论该方法简便可靠,为蟾酥原浆质量把控提供一定依据及参考。展开更多
基金supported by Changsha Municipal Natural Science Foundation(Grant No.:kq2014265),the Construction Program of Hunan's innovative Province(CN)-High-tech Industry Science and Technology Innovation Leading Project(Project No.:2020SK2002)the Natural Science Foundation of Hunan Province(Grant No.:2023JJ40130)+1 种基金Postgraduate Scientific Research Innovation Project of Hunan Province(Project No.:CX20230317)the Changsha Platform and Talent Plan(kq2203002).
文摘Due to the non-targeted release and low solubility of anti-gastric cancer agent,apatinib(Apa),a first-line drug with long-term usage in a high dosage often induces multi-drug resistance and causes serious side effects.In order to avoid these drawbacks,lipid-film-coated Prussian blue nanoparticles(PB NPs)with hyaluronan(HA)modification was used for Apa loading to improve its solubility and targeting ability.Furthermore,anti-tumor compound of gamabufotalin(CS-6)was selected as a partner of Apawith reducing dosage for combinational gastric therapy.Thus,HA-Apa-Lip@PB-CS-6 NPs were constructed to synchronously transport the two drugs into tumor tissue.In vitro assay indicated that HA-Apa-Lip@PB-CS-6 NPs can synergistically inhibit proliferation and invasion/metastasis of BGC-823 cells via downregulating vascular endothelial growth factor receptor(VEGFR)and matrix metalloproteinase-9(MMP-9).In vivo assay demonstrated strongest anti-tumor growth and liver metastasis of HA-Apa-Lip@PB-CS-6 NPs administration in BGC-823 cells-bearing mice compared with other groups due to the excellent penetration in tumor tissues and outstanding synergistic effects.In summary,we have successfully developed a new nanocomplexes for synchronous Apa/CS-6 delivery and synergistic gastric cancer(GC)therapy.
文摘三阴性乳腺癌(triple negative breast cancer,TNBC)恶性程度高,预后差,其p53基因的突变频率达80%以上。日蟾蜍它灵(gamabufotalin,CS-6)是日本蟾蜍的皮肤分泌物,有研究表明CS-6具有抗癌作用,但其对TNBC的作用和机制尚无报道。本文采用MTT法和细胞克隆形成实验检测了不同浓度CS-6对TNBC细胞系MDA-MB-468和MDA-MB-231细胞增殖的影响;采用Western-blot检测了CS-6在外源和内源水平对p53和热休克蛋白90(heat shock protein 90,HSP90)表达水平的影响;采用联合指数及等效线分析法考察了CS-6和HSP90的抑制剂坦螺旋霉素(tanespimycin,17-AAG)对MDA-MB-468和MDA-MB-231细胞增殖的协同作用。结果显示,CS-6明显抑制MDA-MB-468和MDA-MB-231细胞的增殖,其抑制增殖机制有可能与降解HSP90/突变p53有关;而且,CS-6和HSP90抑制剂17-AAG联合用药对抑制MDA-MB-468和MDA-MB-231细胞增殖具有协同作用。