冬虫夏草中核苷类成分的毛细管区带电泳定量分析研究

目的:建立冬虫夏草中核苷类成分(腺苷、鸟苷、尿苷和次黄嘌呤核苷)的毛细管电泳定量分析方法,研究青海产天然冬虫夏草和人工发酵虫草菌粉的核苷类成分差异。方法:采用0.025mol·L^-1硼砂缓冲液,pH9.5,工作电压为20kV,毛细管温度25℃,波长检测260nm,对4种核苷定量分析。结果:用毛细管区带电泳法定量分析冬虫夏草及人工发酵虫草菌粉中的腺苷、尿苷、鸟苷和次黄嘌呤核苷,平均加样回收率分别为98.9%,95.1%,97.8%和98.8%,RSD分别为0.4%,1.7%,1.3%和5.0%。在天然冬虫夏草中未检测到腺苷,而在人工发酵虫草菌粉中未检测到次黄嘌呤。结论:本研究方法可满意地用于腺苷、尿苷、鸟苷和次黄嘌呤核苷的定量分析。青海产地道药材冬虫夏草核苷类成分组成与人工发酵虫草菌粉有明显差异。

Quantitative analysis of the nucleosides in Cordyceps sinensiswith capillary zone electrophoresis

OBJECTIVE: To establish a quantitative analysis method for analyzing the nucleosides in Cordyceps sinensis with capillary electrophoresis, and compare the difference between natural and the cultured C. mycelia. METHOD: Capillary zone electrophoresis method was employed to quantitate the adenosine, uridine, guanosine and inosine in C. sinensis, with 0.25 mg x L(-1) boric acid-sodium hydroxide buffer, pH 9.5. The working voltage was 20 kV, the temperature was 25 degrees C, and the detection wavelength was 260 nm. RESULT: With the capillary zone electrophoresis method, the average recovery of the above 4 nucleosides was 98.9%, 95.1%, 97.8% and 98.8% respectively, with the RSD 0.4%, 1.7%, 1.3% and 5.0%. There was no adenosine in natural C. sinensis and no inosine in the cultured C. mycelia detected. CONCLUSION: This method can be used to determine the adenosine, uridine, guanosine and inosine in C. sinensis. The nucleosides in C. sinensis produced from Qinghai province and cultured C. mycelia are obviously different.