Effects of Melandrium firmum methanolic extract on testosterone-induced benign prostatic hyperplasia in Wistar rats

Benign prostatic hyperplasia （BPH） is an age-related disease of unknown aetiology characterized by prostatic enlargement coincident with distinct alterations in tissue histomorphology. Instead of therapeutic agents that can cause severe side effects, plant extracts are frequently used to treat BPH. In this study, we investigated whether the Melandrium firmum methanolic extract （MFME） improves BPH, using the testosterone propionate （TP）-induced BPH rat model. Castration was performed via the scrotal route under sodium pentobarbital anaesthesia. BPH in castrated rats was generated via daily subcutaneous injections of TP （3 mg kg-1） dissolved in corn oil, for 4 weeks. MFME was administered daily by oral garage at a dose of 200 mg kg-1 for 4 weeks, along with the TP injections. The control group received injections of corn oil subcutaneously. At the scheduled termination of the experiment, all rats were killed and their prostates weighed; the relative prostate weight （prostate/body weight ratio） was calculated, and histomorphological changes in the prostate were examined. Additionally, we measured the levels of testosterone and dihydrotestosterone （DHT） in the serum and the prostate. Experimentally induced BPH led to marked decreases in the relative prostate weight and the DHT levels in the serum and the prostate. Histologically, BPH was evident in the ventral lobe of the prostate, and MFME treatment suppressed the severity of the lesions. These results indicate that MFME effectively inhibits the development of BPH induced by testosterone in a rat model. Further studies will be needed to identify the compound（s） responsibility for inducing the protective effect against BPH and determine its mechanism of action,

HPLC法同时测定朝药肾炎草中4种黄酮碳苷成分的含量

[目的]建立可同时测定朝药肾炎草中芹菜素-8-C-阿拉伯呋喃糖、异牡荆素、金圣草素-8-C-阿拉伯呋喃糖和异金雀花素4种黄酮碳苷成分含量的HPLC方法.[方法]采用SunFire C_(18)(5μm,4.6 mm×250 mm)色谱柱,流动相为0.1%(体积分数)冰乙酸的乙腈溶液(B)-0.1%(体积分数)乙酸水溶液(A),梯度洗脱,流动速度为1.0 mL/min,检测波长为335 nm,柱温为50℃,进样量为10μL.[结果]芹菜素-8-C-阿拉伯呋喃糖、异牡荆素、金圣草素-8-C-阿拉伯呋喃糖和异金雀花素分别在0.42~28.00、0.30~20.00、0.90~20.00、0.83~25.14μg/mL的质量浓度范围内与峰面积的线性关系良好,r^(2)>0.9995.精密度、稳定性、重复性试验结果的RSD<2.0%;平均加样回收率在94.7%~107.9%之间,RSD<2.0%.[结论]所建立的方法简便快捷,准确有效,可为朝药肾炎草中黄酮碳苷类成分含量的测定提供参考.

延边产朝药材肾炎草的高效液相色谱指纹图谱研究

目的建立朝药材肾炎草的HPLC-UV指纹图谱。方法采用SunFire^(TM) C_(18)(4.6 mm×250 mm, 5μm)色谱柱;以乙腈(B)-0.4%冰醋酸溶液(A)梯度洗脱,检测波长253 nm,柱温40℃,进样量10μL,流速1.0 mL·min^(-1),采用对照品指认进行成分分析。结果建立了朝药材肾炎草的HPLC-UV特征指纹图谱共有模式,标定了21个共有峰,指认了其中3个黄酮碳苷成分。10批次药材的相似度结果均大于0.95,相似程度高。结论该方法简便,精密度、重复性和稳定性很好,特征性和专属性强,可为肾炎草药材整体质量控制提供有效手段。