γPNA FRET Pair Miniprobes for Quantitative Fluorescent In Situ Hybridization to Telomeric DNA in Cells and Tissue.

γPNA FRET Pair Miniprobes for Quantitative Fluorescent In Situ Hybridization to Telomeric DNA in Cells and Tissue.
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DOI:
10.3390/molecules22122117
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发表时间:
2017-12-02
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Opresko PL
Opresko PL
中科院分区:
其他
文献类型:
--
作者:
Orenstein A;Berlyoung AS;Rastede EE;Pham HH;Fouquerel E;Murphy CT;Leibowitz BJ;Yu J;Srivastava T;Armitage BA;Opresko PL

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通过荧光原位杂交测量端粒长度被广泛用于生物医学和流行病学研究,但自首次报道以来的20年中,该技术的发展相对较少。该报告描述了使用双γ PNA(γPNA)探针,其在沿端粒的交替位点沿着杂交并产生Förster共振能量转移(FRET)信号。在细胞核、染色体扩散和组织样品中观察到端粒的明亮染色。FRET检测的使用还允许消除洗涤步骤,通常需要洗涤步骤来去除会导致背景信号的未杂交的探针。我们发现,这些洗涤步骤可以通过去除结合的以及未结合的探针来降低信号强度,因此消除这些步骤不仅加速了该过程,而且提高了染色质量。因此,γPNA FRET对允许在广泛的研究和临床形式中对端粒进行更亮和更快的染色。
Measurement of telomere length by fluorescent in situ hybridization is widely used for biomedical and epidemiological research, but there has been relatively little development of the technology in the 20 years since it was first reported. This report describes the use of dual gammaPNA (γPNA) probes that hybridize at alternating sites along a telomere and give rise to Förster resonance energy transfer (FRET) signals. Bright staining of telomeres is observed in nuclei, chromosome spreads and tissue samples. The use of FRET detection also allows for elimination of wash steps, normally required to remove unhybridized probes that would contribute to background signals. We found that these wash steps can diminish the signal intensity through the removal of bound, as well as unbound probes, so eliminating these steps not only accelerates the process but also enhances the quality of staining. Thus, γPNA FRET pairs allow for brighter and faster staining of telomeres in a wide range of research and clinical formats.
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