圈养林麝粪样类固醇激素提取方法比较及优化
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1.北京林业大学生态与自然保护学院,濒危物种非损伤性研究实验室 北京 100083;2.漳州片仔癀药业股份有限公司 漳州 363000

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福建省对外合作项目(No. 2023I0046),国家自然科学基金项目(No. 31872962);


Comparison and Optimization of Extraction Method of Fecal Steroid Hormone for Captive Forest Musk Deer Moschus berezovskii
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1.Laboratory Animal Noninvasive Studies, School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083; 2.Zhangzhou Pientzehuang Pharmaceutical Co., Ltd, Zhangzhou 363000, China

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    摘要:

    野生动物粪便作为非损伤性样本具有易于采集、保存及运输的优点,被广泛用于生理代谢产物提取并探查野生动物的生理状态,而粪样类固醇激素是最常用的指标。迄今不同研究者对粪样类固醇激素的提取方法并不统一,而对于各提取步骤的系统比较并进而优化提取方法的研究较少,可能导致测定结果的不确定性。本研究以圈养林麝(Moschus berezovskii)粪便为实验样本,设置粪便取样量、磨碎方式、单次和复提、烘干和免烘干四个步骤的比较,分别采用酶联免疫法和放射免疫方法检测粪样孕酮值和皮质醇值。结果表明,0.1 g、0.3 g和0.5 g三组取样量的孕酮值和皮质醇值均不存在显著差异,但0.1 g组的激素测定值稳定性差;粪便粉碎机磨碎样本和研磨杵研磨样本的孕酮值存在显著差异,但两者皮质醇值无显著差异;溶剂提取的单次样本和复提样本的孕酮值和皮质醇值均存在显著差异;提取液烘干样本与免烘干样本的孕酮和皮质醇不存在显著差异。因此,圈养林麝粪样类固醇激素提取方法优化为,采用粉碎机磨碎的粪样且取样量超过0.1 g干粪,提取时进行复提,在验证待测液中的乙醇浓度不会影响激素测定的前提条件下对上清液免烘干,可达到准确、快捷及简便的效果。

    Abstract:

    [Objectives] Wildlife feces have the advantage of being easy to collect, preserve and transport as a non-invasive sample and are widely used for physiological metabolite extraction and to explore the physiological status of wildlife, with fecal steroid hormones being the most commonly used indicator. There are few researches on the systematic comparison of each extraction step to optimize the extraction method, which may lead to uncertainty in the determination results. This study used captive Forest Musk Deer feces as experimental samples. A comparison of four steps, including fecal sample amount, grinding method, single or repeated extraction, and drying or non-drying, was set up to explore the influence of different factors on extraction contents and stability of results, so as to optimize the extraction method of steroid hormones in Forest Musk Deer feces. [Methods] Fecal progesterone and cortisol contents were detected by enzyme-linked immunoassay and radioimmunoassay respectively. Data were analyzed using one-way ANOVA or independent-samples t test. [Results] The results showed that there were no significant differences in progesterone and cortisol contents between the 0.1 g, 0.3 g and 0.5 g sample groups, but the stability of the hormone measurements was poor in the 0.1 g group (Fig. 1). The contents of progesterone extracted from feces ground by the grinder were significantly different from that ground with liquid nitrogen by a mortar and pestle (t = 3.793, df = 12, P < 0.05), but there were no significant differences in cortisol between the two groups (t = 0.307, df = 12, P > 0.05) (Fig. 2). There were significant differences in both progesterone and cortisol contents between single and repeated solvent extraction (t =﹣4.459, df = 13, P < 0.05; t =﹣16.077, df = 7.434, P < 0.05) (Fig. 3), and no significant differences in progesterone and cortisol between the supernatant (30% ethanol) drying and non-drying groups (t =﹣1.502, df = 13, P > 0.05; t = 0.600, df = 14, P > 0.05) (Fig. 4). [Conclusion] Therefore, the method of extracting steroid hormones from Forest Musk Deer feces is optimized to use feces ground by the grinder and more than 0.1 g, the supernatant should be repeated solvent extraction and no drying (under the premise of verifying that the concentration of ethanol in the liquid to be tested does not affect hormone determination), which could achieve accurate, fast and convenient effect.

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李梦奇,吴怡宁,陈晓毅,王一晨,蒋元琳,张宝峰,石明慧,洪绯,胡德夫.2024.圈养林麝粪样类固醇激素提取方法比较及优化.动物学杂志,59(6):931-938.

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  • 收稿日期:2023-05-29
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  • 在线发布日期: 2024-12-19
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