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开发和应用SPE-UHPLC-MS/MS方法来定量29种类固醇在老鼠血清中的含量
Haiyang Cui1, Dongliang Yang2, Yonggang Zheng3
1College of Pharmacy, Xinjiang Medical University, Urumqi 830017, China.
概括
这项研究提出了一种新的分析方法,用于量化大鼠血清中的29种类固醇代谢物,这对于了解生殖健康和内分泌疾病至关重要. 经过验证的技术揭示了癌症和卵巢切除模型中类固醇代谢的关键变化.
科学领域:
- 内分泌学和新陈代谢学
- 分析化学 分析化学
- 临床前研究 临床前研究
背景情况:
- 类固醇和代谢产物对于生殖健康,内分泌系统疾病和癌症至关重要.
- 现有的人类样品分析方法不适用于老鼠标本,特别是化代谢物.
- 在临床前的老鼠模型中需要经过验证的方法来进行准确的类固醇分析.
研究的目的:
- 开发和验证一种敏感的分析方法,用于量化大鼠血清中的29种类固醇代谢物.
- 在乳腺癌和卵巢切除的老鼠模型中应用该方法来表征类固醇代谢概况.
- 为了研究特定类固醇氧化通路和相关酶的变化.
主要方法:
- 固相提取 (SPE) 与超高性能液体染色学-并联质谱学 (UHPLC-MS/MS) 相结合.
- 优化的类固醇衍生和二维液体染色学 (2D-LC) 以尽量减少干扰和提高灵敏度.
- 严格的方法验证,包括线性,量化极限,准确性,精度,回收,矩阵效应和稳定性.
主要成果:
- 一种高度敏感和经过验证的方法,能够量化29种类固醇代谢物,具有广泛的线性范围 (0.002-250 ng/mL) 和低量化极限 (2-100 pg/mL).
- 证明了高准确度 (88-114%) 和精度 (CV ≤14%),符合监管标准.
- 在N-甲基-N-氨酸尿素诱导的乳腺癌和卵巢切除的老鼠模型中成功表征了不同的血清类固醇代谢概况,确定了雌激素和孕醇氧化途径的改变.
结论:
- 开发的UHPLC-MS/MS方法为在老鼠血清中进行全面的类固醇代谢物分析提供了强大的工具.
- 这些发现突显了临床前模型中类固醇代谢的显著变化,涉及诸如CYP1A1/CYP1B1等酶以及潜在的非CYP21A2通路.
- 这种经过验证的方法支持对类固醇相关疾病和治疗干预措施的进一步临床前研究.
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