60508-81-8Relevant academic research and scientific papers
A New One-Pot Fluorescence Derivatization Strategy for Highly Sensitive MicroRNA Analysis
Pan, Li,Zhang, Huaisheng,Zhao, Jingjin,Ogungbe, Ifedayo Victor,Zhao, Shulin,Liu, Yi-Ming
, p. 5639 - 5647 (2020/03/23)
MicroRNAs (miRNAs) modulate the expression of over 30 % of mammalian genes during development and apoptosis, and abnormal expression of miRNAs may lead to a range of human pathologies. Therefore, analysis of miRNAs is valuable for disease diagnostics. In this work, a novel one-pot fluorescence derivatization strategy was developed for miRNA analysis. The mechanism of the derivatization reaction was explored by using instrumental methods, including liquid chromatography, fluorescence spectroscopy, and mass spectrometry. Highly fluorescent N6-ethenoadenine (?-adenine) was formed and detached from the miRNA sequence through the reaction of adenine in nucleic acids with 2-chloroacetaldehyde (CAA) at 100 °C. This is the first experimental evidence that the cooperation of formed ?-adenine and water-mediated hydrogen-bond interaction between the proton at the 2′- and the oxyanion at 3′-positions stabilized the oxocarbenium significantly, which makes the depurination and derivatization of miRNA highly effective. Based on this derivatization strategy, a facile and sensitive high-performance liquid chromatography method was developed for quantitative assay of miRNAs. In combination with magnetic solid-phase extraction (MSPE), the HPLC method was shown to be useful for the determination of microRNAs at sub-picomolar level in serum samples.
Synthesis of 2-azido-1,N6-etheno and 2-azido analogs of deoxyadenosine as nucleotide photoaffinity probes
Flaherty,Balse,Li,Moore,Doughty
, p. 65 - 76 (2007/10/02)
We prepared 2-azido-1,N6-etheno-2'-deoxyadenosine 5'-monophosphate (7b) by activation of the 2-thio analog 4b by two methods. In the preferred method, 4b was treated with 2,4-dinitrofluorobenzene in 50% aqueous acetonitrile, and the resultant thioether was cleaved with hydrazoic acid, yielding the 2-azido-1,N6-etheno analog 7b in 70% isolated yield. N-bromoacetamide oxidized the etheno group of 7b, giving the 2-azido analog of dAMP 9b in 78% yield.
