UHPLC-LTQ-Orbitrap MS结合高能碰撞诱导裂解技术快速鉴定大鼠口服麦冬甾体皂苷后的血中移行成分

Rapid characterization of constituents absorbed into blood after oral administration of steroidal saponins from Radix Ophiopogonis using UHPLC-LTQ-Orbitrap MS coupled with higher energy collision induced dissociation

为了深入研究麦冬活性部位体内药效物质基础,本研究应用UHPLC-LTQ-Orbitrap MS结合高能碰撞诱导裂解技术(HCD)对大鼠口服麦冬甾体皂苷后的入血成分进行快速分析,对比给药后大鼠血浆、大鼠空白血浆、麦冬甾体皂苷提取物以及对照品之间的色谱和质谱信息,辅以特征诊断离子判别,最终共鉴定了31个血中移行成分,包括13个呋甾烷醇型甾体皂苷和18个(异)螺甾醇型甾体皂苷。其中,8个移行成分的结构可通过与对照品比对被准确鉴定。该结果可为进一步研究麦冬药效物质基础和作用机制提供依据。

The method of UHPLC-LTQ-Orbitrap mass spectrometry coupled with higher energy collision dissociation （HCD） was established to rapidly analyze the constituents absorbed into blood after oral administration of steroidal saponins from Radix Ophiopogonis. A total of 31 constituents, including 13 furostanol steroidal saponins and 18 spirostanol steroidal saponins, were characterized based on the accurate mass measurements, fragmentation patterns, chromatographic retention times, and diagnostic product ions. Among them, 8 compounds were unambiguously identified by comparison with their corresponding standards. The results provide comprehensive insights and guidance for elucidation of material basis of Radix Ophiopogonis activity.