西北地区商品甘草HPLC指纹图谱

目的:研究西北地区商品甘草的高效液相指纹图谱,为建立商品甘草的行业质量标准提供依据.方法:采用高效液相色谱法,选用ZORBAX Edipse XDB-C18柱(4.60 mm ×250 mm,5μm),柱温25℃,以乙腈-0.05％磷酸溶液为流动相,检测波长237 nm,进行梯度洗脱,生成图谱.使用“中药色谱指纹图谱相似度评价系统2004A”和SPSS软件建立HPLC对照指纹图谱并进行聚类分析.结果:建立了西北地区商品甘草的高效液相指纹图谱,方法学验证符合要求.16批商品甘草药材的指纹图谱有10个特征共有峰,与生成对照图谱比较相似度均＞0.904,通过聚类分析将16批药材聚为4类.结论:该方法稳定、可靠,本研究首次采用HPLC指纹图谱比较西北地区不同等级的商品甘草,为西北地区商品甘草的质量考察、等级划分提供有益参考.     

四叶参多糖对糖尿病大鼠血糖及免疫功能的影响

目的:研究四叶参多糖对糖尿病大鼠血糖及免疫功能的影响.方法:采用腹腔注射四氧嘧啶制备糖尿病大鼠模型.灌胃给予四叶参多糖(0.1,0.5 g·kg-1),于治疗0,7,14,21 d取大鼠尾血,用酶化学方法检测空腹血糖;分离胸腺、脾脏,计算胸腺指数和脾指数;MTT法检测淋巴细胞增殖能力,计算刺激指数(SI).结果:与正常对照组大鼠比较,模型组大鼠空腹血糖显著升高,3周后,胸腺极度萎缩(P＜0.01),脾淋巴细胞转化能力明显下降(P＜0.01).四叶参多糖治疗2周后,与模型组比较,大鼠空腹血糖显著降低(P＜0.05),连续治疗3周,胸腺指数显著提高(P<0.05,P＜0.01);高剂量组大鼠脾淋巴细胞转化能力增强,刺激指数明显升高(P＜0.05).结论:四叶参多糖可降低糖尿病大鼠空腹血糖,并能改善其细胞免疫功能.     

荜茇根对胆汁反流胃炎大鼠模型的防治作用及对胃泌素、PGE2、TNF-α、IL-8含量的影响

目的:探讨荜茇根提取物对胆汁反流性胃炎大鼠模型胃黏膜的保护作用及与血清胃泌素(GAS)和胃黏膜PGE2、TNF-α、IL-8含量的关系。方法:自制返流液给大鼠灌胃制作胆汁返流性胃炎大鼠模型;放射免疫法测定GAS、PGE2、TNF-α、IL-8含量。以多潘立酮为对照,观察荜茇根提取物对实验性胆汁反流性胃炎大鼠胃黏膜病理组织学和GAS、PGE2、TNF-α、IL-8含量的影响。结果:模型组大鼠胃黏膜出现明显损伤,有大量炎细胞浸润,部分大鼠见不典型增生和粘膜肠上皮样化生,同时血清GAS、粘膜PGE2含量降低(P<0.01)和黏膜TNF-α、TL-8含量增高(P<0.01);与模型组比较,荜茇根提取物可明显减轻模型大鼠胃黏膜的炎症反应,并提升血清GAS、黏膜PGE2含量,降低黏膜TNF-α、TL-8的含量(均P<0.05或P<0.01)。结论:荜茇根提取物对模型大鼠胃黏膜有显著保护作用,作用的发生与升高血清GAS、胃黏膜PGE2,降低胃黏膜TNF-α、IL-8有关。     

高效液相色谱法测定栀子根中齐墩果酸3-乙酸酯含量

目的建立高效液相色谱法测定栀子根中齐墩果酸3-乙酸酯含量的方法。方法样品采用不同种类、不同浓度、不同时间的酸水解,将栀子根中齐墩果酸3-乙酸酯水解成齐墩果酸后,用二氯甲烷萃取、蒸干、甲醇定容,制备供试液,再采用高效液相色谱法测定其含量。结果样品的甲醇提取液加盐酸2 mL,加热回流4 h,水解较好。齐墩果酸3-乙酸酯在1.102 5～11.025μg范围内线性关系良好,r=0.999 8,平均回收率为96.00%（RSD=1.34%）。结论本方法操作简便,重复性好,专属性强,可用于栀子根的质量控制。     

Synergistic interaction between Astragali Radix and Rehmanniae Radix in a Chinese herbal formula to promote diabetic wound healing

Ethnopharmacological relevance

Astragali Radix (AR) and Rehmanniae Radix (RR) are two traditional Chinese medicines widely used in China for treating diabetes mellitus and its complications, such as diabetic foot ulcer.

Aim of study

In our previous study, a herbal formula NF3 comprising AR and RR in the ratio of 2:1 was found effective in enhancing diabetic wound healing in rats through the actions of tissue regeneration, angiogenesis promotion and inflammation inhibition. The aims of the present study were to investigate the herb–herb interaction (or the possible synergistic effect) between AR and RR in NF3 to promote diabetic wound healing and to identify the principal herb in the formula by evaluating the potencies of individual AR and RR in different mechanistic studies.

Materials and methods

A chemically induced diabetic foot ulcer rat model was used to examine the wound healing effect of NF3 and its individual herbs AR and RR. For mechanistic studies, murine macrophage cell (RAW 264.7) inflammation, human fibroblast (Hs27) proliferation and human endothelial cell (HMEC-1) migration assays were adopted to investigate the anti-inflammatory, granulation formation and angiogenesis-promoting activities of the herbal extracts, respectively.

Results

In the foot ulcer animal model, neither AR nor RR at clinical relevant dose (0.98 g/kg) promoted diabetic wound healing. However, when they were used in combination as NF3, synergistic interaction was demonstrated, of which NF3 could significantly reduce the wound area of rats when compared to water group (p < 0.01). For anti-inflammation and granulation formation, AR was more effective than RR in inhibiting lipopolysaccharide (LPS)-induced nitric oxide production from RAW 264.7 cells and promoting Hs27 fibroblast proliferation. In the aspect of angiogenesis promotion, only NF3 promoted cell migration of HMEC-1 cells.

Conclusions

AR plays a preeminent role in the anti-inflammatory and fibroblast-proliferating activities of NF3. The inclusion of RR, however, is crucial for NF3 to exert its overall wound-healing as well as the underlying angiogenesis-promoting effects. The results of present study justified the combined usage of AR and RR in the ratio of 2:1 as NF3 to treat diabetic foot ulcer and illustrated that AR is the principal herb in this herbal formula.     

Herb–drug pharmacokinetic interaction between radix astragali and pioglitazone in rats

Ethnopharmacological relevance

Radix astragali (RA) was the most frequently used traditional Chinese medicine (TCM) according to the statistics on 52 anti-diabetic formulas recorded in New National Traditional Chinese Medicine; it was employed in 34 out of the 52 formulas. The aim of this study was to elucidate potential pharmacokinetic interaction between RA and pioglitazone, and to provide guidance for clinical medicine safety.

Materials and methods

A specific and rapid UPLC–MS/MS method was established to quantify pioglitazone in rat plasma. Then healthy and type 2 diabetes mellitus (T2DM) rats were each divided into control and RA decoction (RAD) administration groups—healthy, healthy-RAD, T2DM, T2DM–RAD; pharmacokinetics of pioglitazone was carried out after RAD was administrated to rats for 7 days.

Results

The established UPLC–MS/MS method was rapid, specific, and precise. Between healthy and healthy-RAD groups, half-life (T_1/2), area under the curve (AUC _0–t), Vz/F, and Cl/F showed mild yet statistically significant differences; no significant difference for any above parameter was detected between T2DM and T2DM–RAD groups.

Conclusion

RAD co-administration did not affect the pharmacokinetics of pioglitazone especially in diabetic groups; RA and pioglitazone might be feasible herb–drug co-effectiveness.     

慢性激怒应激对大鼠胃动力和脑肠肽的影响及柴胡舒肝散的干预作用

目的探讨慢性激怒应激对大鼠胃窦平滑肌动力及下丘脑和血浆促肾上腺皮质激素释放激素(CRH)、促肾上腺皮质激素(ACTH)、瘦素、胃动素的影响,以及柴胡疏肝散的干预作用。方法将40只Wistar大鼠随机分为4组,每组10只,正常组不给任何刺激;模型组、柴胡舒肝散组、生理盐水组均给予夹尾刺激,每次30min,每天2次,连续刺激14天。柴胡舒肝散组、生理盐水组每次应激后分别立即灌胃2ml柴胡散[27.5g/(kg.d)]及生理盐水,每天2次。14天后检测各组大鼠胃窦肌条收缩活动,下丘脑及血浆CRH、ACTH、瘦素和胃动素水平。结果与正常组比较,模型组大鼠离体胃窦肌条收缩频率和振幅明显减少(P<0.01),下丘脑CRH、瘦素及血浆CRH、ACTH、瘦素浓度均明显增高(P<0.01),而下丘脑与血浆胃动素浓度则显著下降(P<0.01)。与模型组比较,柴胡舒肝散组胃窦肌条收缩频率和振幅显著增加(P<0.01),下丘脑和血浆CRH、ACTH及瘦素浓度显著降低(P<0.01),而下丘脑和血浆胃动素浓度则明显上升(P<0.01)。结论柴胡舒肝散可增加慢性激怒应激大鼠胃窦平滑肌动力,改善脑肠肽水平。     

语复康胶囊的薄层色谱鉴别研究

目的：建立语复康胶囊的质量标准。方法：采用薄层色谱（TLC）法对方中丹参药材进行定性鉴别。结果：TLC斑点清晰,分离度好,阴性对照无干扰。结论：定性方法快速、准确、专属性强,所建方法可用于语复康胶囊的质量控制。     

赤芍和白芍不同部位芍药苷和苯甲酸的含量分析研究

目的研究赤、白芍不同部位中芍药苷和苯甲酸的含量差异,为科学评价及有效控制其质量提供可靠方法。方法采用高效液相色谱(HPLC)法测定,色谱柱:Hypersil C18柱(4.6 mm×200 mm,5μm);流动相:乙腈-0.05%磷酸水(14∶86);检测:UV 230 nm;流速:1.0 ml/min;柱温:25℃。结果赤、白芍不同部位中芍药苷和苯甲酸的含量不同。结论运用HPLC技术,可以快速准确地对赤、白芍不同部位中芍药苷和苯甲酸的差异进行定量分析,从而为区别同为芍药来源的赤芍和白芍的临床应用提供实验依据。     

HPLC同时测定附子中盐酸多巴胺和去甲猪毛菜碱

目的:用HPLC同时测定附子中盐酸多巴胺和去甲猪毛菜碱的含量.方法:采用Agilent Eclipse C18柱(4.6 mm×250 mm,5μm),流动相为0.1％磷酸水溶液,流速1 mL·min-1,柱温35℃,检测波长280 nm.结果:盐酸多巴胺和去甲猪毛菜碱色谱峰与其他色谱峰分离良好,样品中盐酸多巴胺和去甲猪毛菜碱色谱峰的DAD光谱与对照品一致,进样量在0.00521 ～0.521 μg和0.005 24 ～0.524 μg线性关系良好,平均回收率分别为100.6％和96.5％,RSD分别为2.0％和1.0％(n=6).结论:实验含量测定方法准确、快速,为附子质量控制提供参考方法.