Exploiting the tumor-suppressive activity of the androgen receptor by CDK4/6 inhibition in castration-resistant prostate cancer

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三七HPLC指纹图谱及5种成分测定

目的 建立三七HPLC指纹图谱,并测定5种成分的含有量.方法 三七70%甲醇提取物的分析采用Waters XBridge C18色谱柱(4.6 mm×250 mm,5μm);流动相乙腈-水,梯度洗脱;体积流量1.5 mL/min;柱温25℃;检测波长203 nm.结果 15批样品指纹图谱中有5个共有峰,相似度均大于0.99.三七皂苷R1、人参皂苷Rg1、人参皂苷Re、人参皂苷Rb1和人参皂苷Rd分别在0.000 76~0.567 64(r=0.9999)、0.002 69~2.017 43 (r=0.9998)、0.000 38~0.283 82 (r=1.000 0)、0.002 83~2.12483 (r=0.999 8)、0.000 78~0.582 98 mg/mL (r=0.999 8)范围内线性关系良好,平均加样回收率分别为101.78%、97.22%、102.14%、98.96%、101.73%,RSD分别为1.58%、1.31%、2.17%、1.55%、1.80%.结论 该方法简便、快速、准确,可用于三七的质量控制.     

心衰宁合剂质量控制研究*

目的建立心衰宁合剂的质量标准。方法采用薄层色谱法(TLC)对处方中的红参、黄芪、丹参进行定性鉴别;用高效液相色谱法(HPLC)测定心衰宁合剂中人参皂苷Rb1的含量。结果薄层图谱斑点清晰,阴性对照无干扰;人参皂苷Rb1在1.095～5.475 μg呈良好的线性关系,平均回收率为 97.3%,RSD为1.98%。结论建立的方法简便,准确,重复性好,精密度高,可用于心衰宁合剂的质量控制。     

SIRT1/eNOS/NO通路在人参皂苷Rb1抗内皮细胞复制性衰老中的作用

目的:观察人参皂苷Rb1延缓人脐静脉内皮细胞(HUVECs)复制性衰老的作用,并探讨SIRT1/e NOS/NO通路在其中的作用机制。方法:建立原代HUVECs复制性衰老模型,根据细胞形态的变化、衰老相关β-半乳糖苷酶(SA-β-Gal)染色阳性率和纤溶酶原激活物抑制剂1(PAI-1)的表达水平评估HUVECs衰老情况;采用real-time PCR方法和Western blot法检测沉默SIRT1前后衰老细胞中e NOS和PAI-1的mRNA和蛋白表达,并检测细胞上清NO的含量。结果:累积细胞群体倍增水平(CPDL)为16的HUVECs可作为复制性衰老模型; 80μmol/L人参皂苷Rb1处理后衰老细胞内SIRT1和eNOS的mRNA及蛋白表达水平增加,NO含量增加(P 0. 05),而PAI-1的mRNA和蛋白表达水平下降(P 0. 05);沉默SIRT1后,衰老细胞内e NOS的mRNA及蛋白表达减少,PAI-1的mRNA及蛋白表达增加,NO含量减少(P 0. 05);与SIRT1沉默组比较,在沉默SIRT1基础上加用人参皂苷Rb1后,e NOS和PAI-1表达水平及NO的含量未见明显变化。结论:人参皂苷Rb1可通过调控SIRT1/e NOS/NO通路延缓HUVECs复制性衰老。     

Proteins of the retinoblastoma pathway,FEN1 and MGMT are novel potential prognostic biomarkers in pancreatic adenocarcinoma

Background

We studied the expression of some major proteins involved in cell-cycle regulation and DNA repair, the roles of which are not well known in pancreatic ductal adenocarcinoma (PDAC), but which have a significant impact on carcinogenesis of many other cancers.

Expression of retinoblastoma gene (Rb) protein in T12MO prostatic adenocarcinoma

The expression of Rb protein was analysed by immunocytochemical methods in 118 patients with T12M0 prostatic adenocarcinoma who were followedup for more than 12 years. Rb protein was expressed in 117/118 (99%) tumours. The fraction of positive nuclei was (mean±SD, 92±19%) and only one tumour was completely negative for Rb protein. Abnormal expression of the Rb protein (in fewer than 90% of cells) was independent of the T category while there was a significant relationship between DNA ploidy (P=0.0138), S-phase fraction (P=0.0042) and expression of the Rb protein. Abnormal expressin of the Rb protein had no prognostic value while T category (P=0.0017), Gleason score (P=0.0097), DNA ploidy (P=0.0034), S-phase fraction (P=0.0179) and mitotic index (P=0.0001) were significant prognostic factors. In multivariate analysis the only independent predictor was the mitotic index [Risk ratio (RR) (95%CI)=7.4(2.4–22.5),P=0.004]. The results show that Rb protein immunohistochemistry has hardly any prognostic significance in prostatic adenocarcinoma whereas direct measurement of cell proliferative activity contains significant prognostic information.     

根皮素对rBMECs摄取人参皂苷Rb1的影响

 目的 以原代培养的大鼠脑微血管内皮细胞为模型,研究根皮素对大鼠脑微血管内皮细胞摄取人参皂苷Rb1的影响。方法 实验分为2组,人参皂苷Rb1对照组和根皮素干预组。运用LC-MS/MS测定大鼠脑微血管内皮细胞对人参皂苷Rb1的摄取量,BCA法测细胞蛋白浓度。结果 根皮素干预组大鼠脑微血管内皮细胞对人参皂苷Rb1的摄取量显著低于人参皂苷Rb1对照组(P<0.05)。结论 根皮素可显著抑制大鼠脑微血管内皮细胞对人参皂苷Rb1的摄取。     

糖耐康颗粒含量测定方法研究

目的：研究糖耐康颗粒的含量测定方法。方法：采用高效液相色谱（HPLC）法测定糖耐康中迷迭香酸的含量,C18色谱柱（150 mm×4.6 mm,5 μm）,流动相为0.1%三氟乙酸－甲醇（60：40）,检测波长λ为330 nm,理论板数大于2 000,用标准曲线法测定;采用HPLC法测定人参皂苷Rg1、Re、Rb1的含量,采用C18色谱柱（150 mm×4.6 mm,5 μm）,流动相为水－乙腈,梯度检测方法,检测波长λ为203 nm,理论板数均大于2 000,用标准曲线法测定。结果：迷迭香酸在浓度为0.300-0.500 mg·mL^-1范围内线性关系良好,回归方程为：Y=1E+07X-7 334,R₂=0.999,测得加样回收率为97.32%（RSD 1.25%）。人参皂苷Rg1在0.138-0.220 mg·mL^-1范围内均有良好的线性关系,回归方程为：Y=2E+06X+34 864,R₂=0.999;人参皂苷Re在0.126 mg·mL^-1-0.250 mg·mL^-1范围内均有良好的线性关系,回归方程为：Y=2E+06X+39 879,R₂=0.999;人参皂苷Rb1在0.132-0.220 mg·mL^-1内均有良好的线性关系,回归方程为：Y=2E+06X+39 070,R₂=0.999。3种人参皂苷的加样回收率分别为：Rg1 97.97%（RSD 1.83%）;Re 101.80%（RSD 1.83%）;Rb1 98.35%（RSD 1.82%）。结论：该含量测定方法简便、快捷、可靠,可用于糖耐康的质量控制。     

UPLC法测定一捻金中人参皂苷Rg1、人参皂苷Re、人参皂苷Rb1的含量

目的:建立超高效液相色谱法测定一捻金中人参皂苷Rg1、人参皂苷Re、人参皂苷Rb1含量的方法。方法:色谱柱:ZORBAX Eclipse Plus C18柱(2.1 mm×50 mm,1.8μm);流速:0.21 ml·min-1;柱温:30℃;流动相:乙腈-水梯度洗脱;检测波长:203 nm;进样量:1μl。结果:人参皂苷Rg1在浓度为0.020 3~0.303 9 mg·ml-1时线性关系良好(r=0.999 6),平均回收率为99.05%,RSD为1.3%(n=6);人参皂苷Re在浓度为0.020 2~0.302 7 mg·ml-1时线性关系良好(r=0.999 8),平均回收率为101.31%,RSD为1.1%(n=6);人参皂苷Rb1在浓度为0.020 3~0.305 1 mg·ml-1时线性关系良好,r=0.999 8,平均回收率为100.71%,RSD为0.9%(n=6)。结论:该方法简单、准确,可同时测定3种人参皂苷的含量,可作为一捻金的质量控制。