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Single-dose administration of clenbuterol is detectable in dried blood spots.
Drug Testing and Analysis ( IF 2.6 ) Pub Date : 2020-06-20 , DOI: 10.1002/dta.2872
Sara Amalie Solheim 1, 2 , Søren Jessen 1 , Jakob Mørkeberg 2 , Mario Thevis 3 , Yvette Dehnes 4 , Kasper Eibye 1 , Morten Hostrup 1 , Nikolai Baastrup Nordsborg 1
Affiliation  

Clenbuterol is a β2‐agonist prescribed for asthmatic patients in some countries. Based on its anabolic and lipolytic effects observed in studies on rodents and in livestock destined for food production, clenbuterol is abused by bodybuilders and athletes seeking leanness. Urinary clenbuterol analysis is part of routine doping analysis. However, the collection of urine samples is time‐consuming and can be intimidating for athletes. Dried blood spot (DBS) appears attractive as an alternative matrix, but the detectability of clenbuterol in humans through DBS has not been investigated. This study evaluated if clenbuterol could be detected in DBS and urine collected from six healthy men after oral intake of 80 μg clenbuterol. The DBS and urine samples were collected at 0, 3, 8, 24, and 72 h post‐ingestion, with additional urine collections on days 7 and 10. Using LC–MS/MS, it was shown that clenbuterol could be detected in all DBS samples for 24 h post‐ingestion and with 50% sensitivity 3 days after ingestion. The DBS method was 100% specific. Evaluation of analyte stability showed that clenbuterol is stable in DBS for at least 365 days at room temperature when using desiccant and avoiding light exposure. In urine, clenbuterol was detectable for at least 7–10 days after ingestion. Urinary clenbuterol concentrations below 5 ng/mL were present in some subjects 24 h after administration. Collectively, these data indicate that DBS are suitable for routine doping control analysis of clenbuterol with a detection window of at least 3 days after oral administration of 80 μg.

中文翻译:

在干血斑中可检测到克伦特罗的单剂量给药。

瘦肉精是一种 β 2某些国家为哮喘患者开具的激动剂。根据在啮齿动物和用于食品生产的牲畜中观察到的合成代谢和脂肪分解作用,瘦肉精被健美运动员和寻求瘦身的运动员滥用。尿液克仑特罗分析是常规兴奋剂分析的一部分。然而,尿液样本的收集非常耗时,对运动员来说可能是令人生畏的。干血斑 (DBS) 作为替代基质似乎很有吸引力,但尚未研究通过 DBS 在人体中检测克仑特罗的能力。这项研究评估了在 DBS 和从六名健康男性口服摄入 80 μg 瘦肉精后收集的尿液中是否可以检测到瘦肉精。在摄入后 0、3、8、24 和 72 小时收集 DBS 和尿液样本,并在第 7 天和第 10 天收集额外的尿液。使用 LC-MS/MS,结果表明,在摄入后 24 小时内,所有 DBS 样品中均可检测到瘦肉精,摄入后 3 天的灵敏度为 50%。DBS 方法的特异性为 100%。分析物稳定性评估表明,在室温下使用干燥剂并避免光照时,克仑特罗在 DBS 中至少可稳定 365 天。在尿液中,摄入后至少 7-10 天内可检测到克仑特罗。给药后 24 小时,一些受试者的尿液克伦特罗浓度低于 5 ng/mL。总的来说,这些数据表明 DBS 适用于克仑特罗的常规兴奋剂控制分析,其检测窗口为口服 80 μg 后至少 3 天。DBS 方法的特异性为 100%。分析物稳定性评估表明,在室温下使用干燥剂并避免光照时,克仑特罗在 DBS 中至少可稳定 365 天。在尿液中,摄入后至少 7-10 天内可检测到克仑特罗。给药后 24 小时,一些受试者的尿液克伦特罗浓度低于 5 ng/mL。总的来说,这些数据表明 DBS 适用于克仑特罗的常规兴奋剂控制分析,其检测窗口为口服 80 μg 后至少 3 天。DBS 方法的特异性为 100%。分析物稳定性评估表明,在室温下使用干燥剂并避免光照时,克仑特罗在 DBS 中至少可稳定 365 天。在尿液中,摄入后至少 7-10 天内可检测到克仑特罗。给药后 24 小时,一些受试者的尿液克伦特罗浓度低于 5 ng/mL。总的来说,这些数据表明 DBS 适用于克仑特罗的常规兴奋剂控制分析,其检测窗口为口服 80 μg 后至少 3 天。给药后 24 小时,一些受试者的尿液克伦特罗浓度低于 5 ng/mL。总的来说,这些数据表明 DBS 适用于克仑特罗的常规兴奋剂控制分析,其检测窗口为口服 80 μg 后至少 3 天。给药后 24 小时,一些受试者的尿液克伦特罗浓度低于 5 ng/mL。总的来说,这些数据表明 DBS 适用于克仑特罗的常规兴奋剂控制分析,其检测窗口为口服 80 μg 后至少 3 天。
更新日期:2020-06-20
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