巴西和中国的组成,用于贴片测试
Evelyn Calta1, Anton de Groot2, Emma M van Oers3
1Kurt Kitzing GmbH, Wallerstein, Germany.
Contact dermatitis
|April 2, 2025
概括
补丁测试显示,巴西和中国的反应性存在显著差异. 化学分析证实了不同的挥发性成分,这表明这可能解释了不同的过敏反应.
科学领域:
- 分析化学 分析化学
- 皮肤病学 皮肤病学
- 自然产品 化学 化学
背景情况:
- 在阿姆斯特丹 (2024) 进行的贴片测试显示,巴西的高阳性反应 (>20%) 与中国的低反应性 (3.5%) 相比.
- 假设 прополис组成的差异是导致补丁测试结果变化的原因.
研究的目的:
- 分析用于商业过敏测试的巴西和中国样品的化学成分.
- 研究不同缩时间如何影响巴西的质量和数量组成.
主要方法:
- 用气色谱-质谱/火焰电离检测 (GC-MS/FID) 分析了样的挥发性成分.
- 使用头部空间固态微提取 (SPME) 来获得用于分析的挥发性化合物.
主要成果:
- 在巴西和中国的样之间发现了重要的组成差异.
- 巴西 прополис含有丰富的酸 (16.9%), (E) - 尼罗利多尔 (7.41%),斯巴图伦醇 (5.45%) 和朱内诺尔 (4.01%).
- 中国的 прополис含有主要的化合物,如 (E) - 肉醇 (8.08-24.96%),2-乙醇 (8.93-11.25%),α-黄素 (8.77-8.81%),和瓜伊醇 (5.96-5.72%).
结论:
- 在补丁测试中使用的巴西和中国的挥发性化学特征显著不同.
- 需要进行进一步的研究,以确定这些组成变异是否对补丁试验反应性观察到的差异负责.
相关概念视频
02:57Southern Blot
Agarose gel electrophoresis is very useful in separating DNA fragments by size. Running a DNA ladder containing fragments of the known length alongside the sample helps determine the approximate length of the sample DNA fragments. However, additional steps are needed to verify the sequence identity of the sample DNA fragments.
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
01:15Western Blotting
Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.