RP—HPLC法测定瓜蒌子中3，29-二苯甲酰基栝楼仁三醇含量

目的:建立 RP-HPLC 法测定瓜蒌子中3,29-二苯甲酰基栝楼仁三醇的含量。方法:采用 Polaris C_(18)色谱柱(250mm×4.6mm,5μm);以甲醇-水(93:7)为流动相,流速1.0 mL·min~(-1),紫外检测波长为230nm;柱温25℃;进样量5μL。结果:3,29-二苯甲酰基栝楼仁三醇线性范围为0.0484-2.4200μg(r=0.9999),3个浓度的回收率分别为96.19%,100.7%,100.6%(n=3);RSD 分别为3.3%,0.63%,1.2%。结论:本方法简单、重复性好、专属性强,可为评价不同产地的瓜蒌子药材质量提供科学依据。     

Effect of lubricants and a vaginal spermicide gel on the detection of prostate specific antigen,a biomarker of semen exposure,using a quantitative (Abbott ARCHITECT) assay

Objectives

Little is known about the effects of commonly used lubricants on detection of biomarkers of semen exposure. We investigated the in vitro effect of Gynol®, K-Y Jelly®, Replens®, Astroglide®, Carbopol, and Silicorel on quantitative detection of prostate specific antigen (PSA).

Study Design

A predetermined concentration of each of the gels was added to serially diluted semen samples. Additionally, serial dilutions of each of the gels were added to three different semen dilutions (high, medium, or low). The resulting samples were tested for PSA on the Abbott ARCHITECT System.

Results

When using the Abbott ARCHITECT system, the only products that inhibited PSA detection were Gynol® and Replens®. The inhibition caused by Gynol® was dose-dependent, but that of Replens was dose-independent. K-Y Jelly®-spiked samples had higher PSA values than controls.

Conclusions

Caution is warranted when using the Abbott quantitative assay for PSA detection as a biomarker of semen exposure in settings where Gynol®, Replens® or K-Y Jelly® might also have been used. Neither Astroglide® nor Silicorel inhibited PSA detection. Additional studies evaluating other vaginal products, including microbicides, and their effects on other assays, are needed. In vivo studies will be especially important to optimize PSA detection from clinical samples.

Implications

Researchers should consider the potential for specific lubricants or any vaginal products to affect the particular assay used for semen biomarker detection. The Abbott ARCHITECT’s total PSA assay should not be used with the product Replens. Caution is warranted when using the assay in settings where Gynol or K-Y jelly may have been used.     

Does tenofovir gel or do other microbicide products affect detection of biomarkers of semen exposure in vitro?

Objectives

There is currently no information on whether products evaluated in HIV microbicide trials affect the detection of the semen biomarkers prostate-specific antigen (PSA) or Y chromosome DNA.

Study Design

We tested (in vitro) dilutions of tenofovir (TFV), UC781 and the hydroxyethylcellulose (HEC) placebo gels using the Abacus ABAcard and the quantitative (Abbott Architect total PSA) assays for PSA and Y chromosome DNA by real-time polymerase chain reaction.

Results

TFV gel and the HEC placebo adversely affected PSA detection using the ABAcard but not the Abbott Architect total PSA assay. UC781 adversely affected both the ABAcard and Abbott Architect total PSA assays. While there were some quantitative changes in the magnitude of the signal, none of the products affected positivity of the Y chromosome assay.

Conclusions

The presence of TFV or HEC gels did not affect quantitative PSA or Y chromosome detection in vitro. Confirmation of these findings is recommended using specimens obtained following use of these gels in vivo.

Implications

Researchers should consider the potential for specific microbicides or any products to affect the particular assay used for semen biomarker detection. The ABAcard assay for PSA detection should not be used with TFV UC781, or HEC.     

芡实多糖理化性质及抗氧化活性研究

采用水提醇沉、脱蛋白等工艺制备中药芡实多糖,并通过纤维素柱和葡聚糖凝胶柱分离纯化。精多糖分子量为15 367 Da,其单糖组成为葡萄糖：鼠李糖（0．0142：0．0026）,理化反应和红外光谱均符合多糖特征。体外抗氧化实验表明,芡实多糖能够显著清除DPPH、超氧阴离子和过氧化氢等自由基,并具有较强还原力。体内抗氧化实验显示,芡实多糖能够显著提高D-半乳糖所致衰老小鼠的SOD、CAT、GSH—Px水平,降低MDA水平。结果表明,芡实多糖具有广泛的研究前景。     

Pyrethroid insecticide exposure and semen quality of young Japanese men

The present study aimed at assessing the relationship between exposure to pyrethroid insecticides and semen quality in 323 university students recruited in a population-based manner in Metropolitan Tokyo. Urinary concentrations of pyrethroid insecticide metabolite, 3-phenoxybenzoic acid (3-PBA), were measured by LC/MS/MS and semen parameters were measured by following internationally harmonized protocols. Median urinary 3-PBA concentration was 0.641 ng/mL (specific gravity-adjusted, n = 322). Median values of semen volume, sperm concentration, motility, total number of sperm, and total number of motile sperm were 2.5 mL, 56 × 10⁶/mL, 61%, 141 × 10⁶, and 82 × 10⁶, respectively. Urinary concentration of 3-PBA was not selected as significant in multiple regression models indicating, in contrast to previous findings, that environmental exposure to pyrethroid insecticides did not affect semen quality. This inconsistency may be related to exposure to different pyrethroid insecticides and/or levels of exposure as well as to survey design (hospital- vs population-based subject recruitment).     

基于多元统计分析的车前子药材质量等级研究

目的 以市场收集的48批车前子药材为研究对象,构建外观性状与内在质量相关联的车前子的质量等级评价手段.方法 建立了车前子中京尼平苷酸、毛蕊花糖苷和异毛蕊花糖苷的含量测定方法并完成48批次的测定,同时对48批车前子药材进行了千粒重、长度、宽度、膨胀度、水分、总灰分、酸不溶性灰分的检测;运用主成分分析、偏最小二乘法分析、相...     

高效液相色谱法测定淡豆豉药材中异黄酮的含量

目的:建立高效液相色谱法测定淡豆豉中异黄酮含量。方法:采用HPLC法,色谱柱为YWG C18柱(250 mm×4.5 mm,10μm),以甲醇-水-乙酸(10:10:1)为流动相,流速为0.8 mL·min-1,检测波长260 nm,测定淡豆豉中染料木素(genistein)、大豆黄素(daidzein)含量。结果:染料木素及大豆黄素的线性范围分别为2.00-40.00μg·mL-1和2.64-52.70μg·mL-1,相关系数分别为0.9994和0.9993,不同产地的淡豆豉中异黄酮含量差异较大。结论:本法准确、简便、快速,对于控制和评价淡豆豉的品质有重要意义。     

HPLC法测定复方酸枣仁软胶囊中阿魏酸和五味子甲素

目的 研究采用HPLC法测定复方酸枣仁软胶囊中阿魏酸和五味子甲素的方法.方法 阿魏酸定量测定的色谱条件:色谱柱为迪马公司C18柱(200 mm×4.6 mm,5μm),流动相为甲醇-1％醋酸水溶液(35∶65),检测波长为320 nm,体积流量为1 mL/min,柱温为室温,进样量为10 μL;理论塔板数按阿魏酸峰计不低于3 000;五昧子甲素定量的色谱条件:色谱柱为迪马公司C18柱(200 mm×4.6 mm,5μm);流动相为甲醇-水(77∶33),检测波长为254 nm,体积流量为1 mL/min,柱温为室温,进样量为10μL.结果 阿魏酸的线性范围9.8～49.0μg/mL (r=0.999 6);加样回收率试验RSD为1.98％;五味子甲素的线性范围8.8～44.0 μg/mL (r=0.999 9);加样回收率试验RSD为0.98％.结论 本方法准确、简便、可靠,可作为复方酸枣仁软胶囊质量控制的方法.     

基于主成分分析和聚类判别模式对不同产地芡实HPLC指纹图谱研究

目的 建立芡实药材指纹图谱,并进行主成分分析和聚类判别.方法 芡实的70％甲醇萃取液采用高效液相色谱法,以Hypersil ODS柱(4.6 mm ×200 mm,5μm)为色谱柱,乙腈-1％乙酸水溶液进行梯度洗脱,体积流量1.0 mL/min,检测波长273 nm,柱温30℃.结果 建立了14个产地药材的共有图谱,确定了17个共有峰,得到3个决定峰,聚成五类,并比较了样品中柚皮素的含有量.结论 主成分分析结合聚类判别所建立的HPLC指纹图谱及定量分析方法均具有快速稳定的特点.