Visualising G-quadruplex DNA dynamics in live cells by fluorescence lifetime imaging microscopy.
Visualising G-quadruplex DNA dynamics in live cells by fluorescence lifetime imaging microscopy.
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通过荧光寿命成像显微镜观察活细胞中的 G-四链体 DNA 动态。
DOI:
10.1038/s41467-020-20414-7
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发表时间:
2021-01-08
影响因子:
16.6
通讯作者:
Vilar R
中科院分区:
文献类型:
--
作者:
Summers PA;Lewis BW;Gonzalez-Garcia J;Porreca RM;Lim AHM;Cadinu P;Martin-Pintado N;Mann DJ;Edel JB;Vannier JB;Kuimova MK;Vilar R
Guanine rich regions of oligonucleotides fold into quadruple-stranded structures called G-quadruplexes (G4s). Increasing evidence suggests that these G4 structures form in vivo and play a crucial role in cellular processes. However, their direct observation in live cells remains a challenge. Here we demonstrate that a fluorescent probe (DAOTA-M2) in conjunction with fluorescence lifetime imaging microscopy (FLIM) can identify G4s within nuclei of live and fixed cells. We present a FLIM-based cellular assay to study the interaction of non-fluorescent small molecules with G4s and apply it to a wide range of drug candidates. We also demonstrate that DAOTA-M2 can be used to study G4 stability in live cells. Reduction of FancJ and RTEL1 expression in mammalian cells increases the DAOTA-M2 lifetime and therefore suggests an increased number of G4s in these cells, implying that FancJ and RTEL1 play a role in resolving G4 structures in cellulo. Direct observation of G-quadruplexes (G4s) in live cells is challenging. Here the authors report a method to identify G4s within the nuclei of live and fixed cells using a fluorescent probe combined with fluorescence lifetime imaging microscopy.
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DOI:
10.1038/nrg3296
发表时间:
2012-11
期刊:
Nature reviews. Genetics
影响因子:
--
作者:
通讯作者:
--
影响因子:
21.8
作者:
Di Antonio M;Ponjavic A;Radzevičius A;Ranasinghe RT;Catalano M;Zhang X;Shen J;Needham LM;Lee SF;Klenerman D;Balasubramanian S
通讯作者:
Balasubramanian S
影响因子:
46.9
作者:
Chambers, Vicki S.;Marsico, Giovanni;Balasubramanian, Shankar
通讯作者:
Balasubramanian, Shankar
DOI:
10.1016/s0027-5107(97)00314-x
发表时间:
1998-06-05
影响因子:
2.3
作者:
Douglas, MP;Rogers, SO
通讯作者:
Rogers, SO
影响因子:
3.8
作者:
Leon-Ortiz, Ana Maria;Svendsen, Jennifer;Boulton, Simon J.
通讯作者:
Boulton, Simon J.