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Precoated (Mouse Anti-Rabbit IgG) ELISA 96-Well Strip Plate

Company: Cayman chemicals
Catalog#: 400005
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Ecdysone Quantification from Whole Body Samples of Drosophila melanogaster Larvae
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2021-02-05
[Abstract]  

Steroid hormones strictly control the timing of sexual maturation and final body size both in vertebrates and invertebrates. In insects, the steroid hormone ecdysone controls the timing of the molts between larval instars as well as the transition to metamorphosis. Growth during the final instar accounts for over 80% of the increase in final mass in insects, and the duration of this growth period is driven by a sequence of small ecdysone pulses that ultimately induce metamorphosis. Historically the biologically active form of ecdysone, 20-hydroxyecdysone (20E), was quantified using radio-immunoassays, bioassays, or chromatography assays. However, these assays are methodologically complicated and often time consuming. Furthermore, collecting samples for precise measurements of ecdysone

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[摘要]  [摘要]类固醇激素严格控制着脊椎动物和无脊椎动物的性成熟时间和最终的体型。在昆虫中,类固醇激素蜕皮激素控制着幼虫龄之间蜕皮的时间以及向蜕变的过渡。最终龄期间生长占昆虫增加最终质量的80%以上,而这种生长周期的持续时间是由小的序列驱动的蜕皮激素脉冲,最终诱导metamo ř phosis。从历史上讲,蜕皮激素的生物活性形式20-hydroxyec dysone(20E)是使用放射免疫分析,生物分析或色谱分析定量的。但是,这些测定方法学上很复杂并且通常很耗时。此外,在像果蝇(Drosophila melanogaster)这样的小昆虫中,使用这些测定法收集样品以准确测定蜕皮酮的浓度是有限的。在这里,我们描述了一种精确而灵敏的方法,用于收集精心准备的三龄幼虫,这些幼虫适用于准备使用商用20E酶免疫法(EIA)进行蜕皮激素定量的样品。因为我们使幼虫蜕皮与最终龄期重新同步,收集大量样品并称重每个样品,所以我们能够在最终龄期早期检测到一个小的蜕皮激素峰,称为临界重量蜕皮激素峰。该方法可检测低至6 pg 20E / mg幼虫样品的峰,使我们能够定量测定果蝇中的其他蜕皮激素小峰,这是最终确定其调控和功能的必要前提。

[背景]在BRO一个的d范围动物,发展是紧密由类固醇激素调节。在哺乳动物中,青春期的发作主要受性类固醇激素的调节(Koyama等,2020)。在昆虫中,类固醇激素的蜕皮激素调节的moltin定时克,inclu丁所述的定时变质蜕皮。由于浓度波动小蜕皮激素预计将触发键发育事件,发展的方法来检测改变我ñ蜕皮激素浓度是科学家,旨在评估类固醇激素的作用是至关重要的。在该协议中,我们描述了如何从发育同步的幼虫中收集高质量的样品,以及如何使用市售的酶免疫分析试剂盒为蜕皮激素定量制备这些样品。 ...

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