青天葵抗甲、乙型流感病毒作用研究

目的研究青天葵在体外抗甲、乙型流感病毒株作用。方法选用狗肾细胞培养法考察青天葵不同极性部位对甲型(FM1)、乙型(昆40B)流感病毒的作用。结果青天葵水溶性部位对甲型流感病毒FM1有抑制作用。结论青天葵具有体外抗甲型流感病毒作用。     

中药青天葵组培球茎栽培的研究

目的：通过栽培试验,弄清青天葵组培球茎生育特性,为大面积栽培组培球茎提供科学依据。方法：采用常规栽培管理方式,分组种植对比。结果与结论：青天葵组培球茎周年皆可栽培;大小球茎均能发芽成苗;组培球茎优于野生球茎。     

石山桂花茎叶化学成分的研究

目的:研究石山桂花茎叶部分的化学成分。方法:通过硅胶柱色谱法及光谱法,分离并鉴定其中的化合物。结果:共鉴定了7个化合物,分别为乌苏醇(uvaol,Ⅰ)、齐墩果酸(oleanolic acid,Ⅱ)、毛地黄黄酮-7-O-β-D-吡喃葡萄糖苷(Ⅲ)、芹菜素-7-O-β-D-吡喃葡萄糖苷(Ⅳ)、野漆树苷(rhoifolin,Ⅴ)、ligustroside(Ⅵ)、非丽苷(phillyrin,Ⅶ)。结论:7个化合物均为首次从石山桂花中分离鉴定。     

HPLC法同时测定青天葵药材中7种黄酮的含量

建立同时测定青天葵中鼠李秦素(1)、鼠李柠檬素(2)、鼠李素(3)、鼠李秦素-3-O-β-D-葡萄糖苷(4)、鼠李秦素-3-O-β-D-木糖-(1→4)-β-D-葡萄糖苷(5)、鼠李秦素-3-O-β-D-葡萄糖-(1→4)-β-D-葡萄糖苷(6)和鼠李柠檬素-3-O-β-D-葡萄糖-(1→4)-β-D-葡萄糖苷(7)含量的高效液相色谱法。采用Kromasil C18色谱柱(250 mm×4.6mm,5μm),以0.4%磷酸乙腈为流动相进行梯度洗脱,流速为1.0 mL.min 1,检测波长为256 nm,柱温为40℃。7种黄酮类化合物(1～7)的线性范围分别为0.55～70.00μg.mL 1(r=0.999 7)、0.86～110.00μg.mL 1(r=0.999 7)、0.39～50.00μg.mL 1(r=0.999 7)、0.55～70.00μg.mL 1(r=0.999 5)、1.33～170.00μg.mL 1(r=0.999 8)、1.33～170.00μg.mL 1(r=0.999 8)、0.16～20.00μg.mL 1(r=0.999 5),平均回收率在97.19%～99.45%之间,RS...     

Protection of Total Flavonoid Fraction from Nervilia fordii on Lipopolysaccharide-induced Acute Lung Injury in Rats

Objective To investigate the effects of total flavonoid fraction (TFF) from Nervilia fordii on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in rats, and to explore their protective mechanism. Methods LPS-induced ALI model was established by LPS (5 mg/kg) injection via left cervical vein. Blood samples were collected from the cervical artery of all rats at 5 and 6 h after LPS challenge for arterial blood gas test and cytokines measurements, and pulmonary microvascular permeability (PMP), lung wet/dry weight ratio (W/D), and pathological features were observed. Results Phytochemical study showed that the TFF contained 67.3% of flavonoids expressed in rutin and three flavone glycosides. The TFF pretreatment (6.24 and 12.48 mg/kg) attenuated the partial arterial pressure of oxygen decline in blood significantly, and decreased the PMP and lung W/D ratio in ALI rats. In addition, the TFF (6.24 and 12.48 mg/kg) also ameliorated the LPS-induced lung damages including alveolar edema, neutrophils in?ltration, alveolar hemorrhage, and thickening of the alveolar wall. Furthermore, the treatment with the TFF (6.24 and 12.48 mg/kg) also down-regulated the levels of pro-inflammatory cytokines, such as tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and intercellular adhesion molecule-1 (ICAM-1), and up-regulated the level of anti-inflammatory cytokine IL-10 in serum of ALI rats simultaneously. Conclusion These results suggest that the TFF could protect LPS-induced ALI in rats, which may be mediated, at least in part, by adjusting the production of inflammatory cytokines including TNF-α, IL-6, ICAM-1, and IL-10.     

Antidiabetic activity of alcoholic stem extract of Nervilia plicata in streptozotocin-nicotinamide induced type 2 diabetic rats

Ethnopharmacological relevance

Nervilia plicata (Orchidaceae) has long been used in the antidiabetic medicinal preparations of traditional healers of Wayanad (Kerala), but recuperative potential of the plant was remained undefined. We demonstrated the regenerative potential of the plant extract on kidney affected by type 2 diabetes besides lowering blood glucose.

Aim of the study

The aim of the current study was to investigate the recuperative and regenerative potential of alcoholic stem extract of Nervilia plicata on streptozotocin-nicotinamide induced type 2 diabetic models.

Materials and methods

Non insulin dependent diabetes mellitus (NIDDM) was induced in overnight fasted rats by intramuscular injection (IMI) of 60 mg/kg STZ and 120 mg/kg of nicotinamide after 5 min interval. Blood glucose was assessed by a glucometer, serum urea and creatinine levels were determined by diacetylmonooxime method and Jaffe reaction respectively. Kidney sections were taken and stained with Masson's tri-dye and Periodic Acid Schiff (PAS) and examined for structural changes. Also lipid peroxidation product (LPP) levels were determined as thio barbituric acid reactive substance levels (TBARS) method.

Results

On administration of 5 mg/kg of plant extract, blood glucose levels of the NIDDM rats showed 62.00 and 76.29% decrease in the blood glucose levels on day 0 and day 30 respectively. Damages caused to the kidney tissue were negligible or not seen. Serum urea and creatinine levels showed 61.49 and 70.96% decrease on day 30. LPP levels of kidney and pancreas showed 70.58 and 77.41% decrease respectively.

Conclusion

These results demonstrate significant antidiabetic and regenerative potential of the Nervilia plicata, justifying the use of plant in the indigenous system of medicine. Isolation and characterisation of the compound(s) playing pivotal role in the cure would open new vistas in the therapy of type 2 diabetes.     

中国豆科植物新分类群(一)

笔者经过长时间对豆科的海红豆属Adenanthera、红豆属Ormosia、野扁豆属Dunbaria、山黑豆属Dumasia、胡枝子属Lespedeza…等12个属作了专属系统分类研究,陆续发现了一些新分类群。于是进行再调研与复查核实,补点采集和确认论证,在本文先报导1个新属、4个新种、3个亚种新组合和2个新变种,它们都是中国地理分布的地区特有分类群(除去1个亚种)其余将在另文续报。除此。作了其化学成分、药理试验、花粉与种皮的扫描电镜SEM观测及拍片分析和花、果、叶片和幼枝的比较形态解剖等研究,为新分类群的分类和区别及其亲缘关系提供佐证,为其新药筛选和其他应用开发、保护提供依据或参考。     

青天葵化学成分的研究

目的研究青天葵Nervilia fordii全草的化学成分。方法采用硅胶柱层析、凝胶柱层析和反相硅胶柱层析等色谱方法对青天葵的化学成分进行分离纯化,并根据理化性质和波谱数据鉴定化合物的结构。结果从青天葵的甲醇提取物中分离得到10个化合物,分别鉴定为鼠李素(1)、鼠李秦素(2)、鼠李柠檬素(3)、鼠李秦素-3-O-β-D-葡萄糖苷(4)、鼠李柠檬素-4’-O-β-D-葡萄糖苷(5)、鼠李柠檬素-3-O-β-D-葡萄糖-(1→4)-β-D-葡萄糖苷(6)、沙苑子苷(7)、豆甾醇(8)、豆甾醇-3-O-β-D-葡萄糖苷(9)、酵母甾醇(10)。结论化合物9为首次从该植物中分离得到。     

参薯种质遗传多样性的ISSR分析

目的:研究参薯亲缘关系和遗传多样性.方法:收集20个样品并对其原植物进行鉴定,样品进行ISSR分析,NTSYS-pc计算遗传相似系数,UPGMA方法聚类.结果:20个样品被鉴定为参薯、褐苞薯蓣、山薯.参薯与褐苞薯蓣、山薯存在明细的遗传差异,且其种内差异十分显著,遗传相似性系数为0.672 9～0.990 7.UPGMA聚类显示参薯种内16个样品可划分为4组,对照样品原植物表型特征,可见断面颜色及块茎支根数是评价参薯种质亲缘关系的重要依据.结论:参薯种内遗传多样性水平高,研究为山药区分提供了分子生物学依据,也为参薯新品种选育奠定了基础.     

紫外分光光度法测定青天葵药材总黄酮含量

目的:建立一种青天葵药材中总黄酮含量测定的方法,并考察14批青天葵药材中总黄酮的含量.方法:以芦丁为对照品,AlCl3-HAc-NaAc(pH 5.5)为显色体系,采用紫外分光光度法于最大吸收波长405 nm处测定.结果:芦丁在7.28 ～30.80 mg·L-1线性关系良好(r=1.000),总黄酮平均回收率为100.73％,RSD 1.92％.14批青天葵药材中,总黄酮含量范围为1.25％ ～3.12％.结论:该方法操作简便、快速、准确、稳定可靠,可用于青天葵药材中总黄酮的含量测定.