内质网 (ER) 中的生物膜在各种生物活性中发挥着不可或缺的作用,因此,可视化 ER 膜中的相分离对于研究 ER 的基础生物学至关重要。然而,尚未研究在不同状态的活细胞和不同组织中 ER 相位行为的近红外 (NIR) 比率成像。在此,我们开发了一种极性响应 NIR 荧光探针 ( DCA ),用于可视化 ER 膜中的相行为。探针显示出大的斯托克斯位移,并且对极性高度敏感。通过在室温下直接和本机荧光成像,ER o和 ER dER 中的生物膜可以通过双 NIR 发射颜色清楚地区分。H 2 O 2和同型半胱氨酸(Hcy)诱导的ER应激的氧化损伤可以有效地诱导ER膜中大规模ER o结构域的形成。此外,我们还揭示了不同组织在 ER 膜中表现出不同的相行为。心脏和骨骼肌组织中的ER膜没有明显的相分离,而肝脏组织的ER中存在大面积的ER o结构域,并在与白色脂肪组织中的脂滴(LDs)相邻的ER膜上形成。我
Dual-biomarker-triggered fluorescence probes for differentiating cancer cells and revealing synergistic antioxidant effects under oxidative stress
作者:Changyu Zhang、Qiang-Zhe Zhang、Kun Zhang、Lu-Yuan Li、Michael D. Pluth、Long Yi、Zhen Xi
DOI:10.1039/c8sc03781g
日期:——
contrast, fluorescenceprobe 2 is activated only in the presence of both H2S and hNQO1. Probe 2 exhibits a large fluorescence turn-on (>400 fold), high sensitivity, excellent selectivity as well as good biocompatibility, enabling the detection of both endogenous H2S and hNQO1 activity in living cells. Bioimaging results indicated that probe 2 could differentiate HT29 and HepG2 cancer cells from HCT116
硫化氢 (H 2 S) 和人 NAD(P)H:奎宁氧化还原酶 1 (hNQO1) 是潜在的癌症生物标志物,也是细胞氧化还原稳态的重要参与者。同时检测这两种生物标志物将有利于相关癌症的诊断精度,还有助于研究它们对氧化应激反应的串扰。尽管如此重要,但尚未研究可通过 H 2 S 检测和 hNQO1 活性的双重作用激活的荧光探针。为此,通过将两个化学选择性触发基团安装到一个荧光团中,合理构建了双生物标志物触发荧光探针1和2 。探针1对 H 2 S提供较小的开启荧光响应,但对串联的 H 2 S 和 hNQO1提供大得多的响应。相比之下,荧光探针2仅在H 2 S和hNQO1同时存在的情况下被激活。探针2具有大的荧光开启(>400倍)、高灵敏度、优异的选择性以及良好的生物相容性,能够检测活细胞中的内源性H 2 S和hNQO1活性。生物成像结果表明,由于两种生物标志物内源水平相对较高,探针2可以将HT29
[EN] SUBSTITUTED COUMARIN DYES AND USES AS FLUORESCENT LABELS<br/>[FR] COLORANTS À BASE DE COUMARINE SUBSTITUÉS ET LEURS UTILISATIONS EN TANT QUE MARQUEURS FLUORESCENTS
申请人:ILLUMINA CAMBRIDGE LTD
公开号:WO2022023353A1
公开(公告)日:2022-02-03
The present application relates to substituted coumarin derivatives and their uses as fluorescent labels. These compounds may be used as fluorescent labels for nucleotides in nucleic acid sequencing applications.
Provided herein are compounds, compositions thereof and uses therewith for treating spinal muscular atrophy. In a specific embodiment, provided herein are compounds of a form that may be used to modulate the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. In another specific embodiment, provided herein are compounds of a form that may be used to modulate the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene. In yet another embodiment, provided herein are compounds of a form that may be used to modulate the inclusion of exon 7 of SMN1 and SMN2 into mRNA that is transcribed from the SMN1 and SMN2 genes, respectively.