人单核细胞THP-1源性泡沫细胞内雷帕霉素含量测定的HPLC法的建立及应用
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篇名: 人单核细胞THP-1源性泡沫细胞内雷帕霉素含量测定的HPLC法的建立及应用
TITLE:
摘要: 目的:建立人单核细胞THP-1源性泡沫细胞内雷帕霉素(RAPA)含量的测定方法,研究RAPA靶向制剂(RAPA-NP-Apt)对泡沫细胞的靶向作用。方法:以氧化型低密度脂蛋白诱导THP-1细胞建立泡沫细胞模型,取200 ng/mL的RAPA和200、400、800 ng/mL的RAPA-NP-Apt与泡沫细胞共同孵育60 min。采用高效液相色谱法(HPLC)测定细胞内RAPA含量,色谱柱为Diamonsil C18,流动相为乙腈-水(90 ∶ 10,V/V),流速为1.0 mL/min,柱温为40 ℃,检测波长为278 nm,进样量为20 μL。结果:RAPA检测质量浓度线性范围为50~6 400 ng/mL(r=0.999 96),平均回收率为98.72%(RSD=0.62%,n=3),日内、日间RSD均不大于6.15%(n=6),稳定性试验的RSD<2%(n=6),重复性试验的RSD=1.64%(n=6)。RAPA和低、中、高质量浓度的RAPA-NP-Apt与泡沫细胞共孵育后RAPA的含量分别为12、43、98、140 ng/106个细胞。结论:本方法操作简单,稳定性和重复性好,可用于泡沫细胞内RAPA的含量测定。RAPA-NP-Apt可提高RAPA对泡沫细胞的靶向作用。
ABSTRACT: OBJECTIVE: To establish the method for the content determination of rapamycin (RAPA) in human monocyte THP-1 derived foam cells, and to study the effects of RAPA targeting preparation (RAPA-NP-Apt) targeting at foam cells. METHODS: Foam cells model were established through THP-1 cells were induced by oxidized low density lipoprotein. Foam cells were incubated with 200 ng/mL RAPA or 200, 400, 800 ng/mL RAPA-NP-Apt for 60 min. The content of RAPA was determined by HPLC. The determination was performed on Diamonsil C18 column with mobile phase consisted of acetonitrile-water (90 ∶ 10, V/V) at flow rate of 1.0 mL/min. The column temperature was set at 40 ℃, and the detection wavelength was 278 nm. The sample size was 20 μL. RESULTS: The concentration of RAPA ranged 50-6 400 ng/mL (r=0.999 96) with average recovery of 98.72% (RSD=0.62%, n=3). RSDs of inter-day and intra-day were not more than 6.15% (n=6), RSD of stability was lower than 2% (n=6), and RSD of repeatability was 1.64% (n=6). After foam cells were incubated with RAPA or low-concentration, medium-concentration and high-concentration of RAPA-NP-Apt, the contents of RAPA were 12, 43, 98, 140 ng/106 cells. CONCLUSIONS: The method is simple, stable and reproducible. It can be used for content determination of RAPA in foam cells. RAPA-NP-Apt can improve the effects of RAPA targeting at foam cells.
期刊: 2017年第28卷第1期
作者: 胡华钟,王仲萍,陈亦清,朱秋连,林彩燕,严鹏科
AUTHORS: HU Huazhong,WANG Zhongping,CHEN Yiqing,ZHU Qiulian,LIN Caiyan,YAN Pengke
关键字: 高效液相色谱法;雷帕霉素;含量测定;靶向药物;泡沫细胞
KEYWORDS: HPLC; Rapamycin; Content determination; Targeting medicine; Foam cells
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