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A colorimetric platform for sensitively differentiating telomere DNA with different lengths, monitoring G-quadruplex and dsDNA based on silver nanoclusters and unmodified gold nanoparticles
Qu, Fei1,2; Chen, Zeqiu1,2; You, Jinmao1,2,3; Song, Cuihua1,2
2018-05-05
Source PublicationSPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume196Pages:148-154
SubtypeArticle
AbstractHuman telomere DNA plays a vital role in genome integrity control and carcinogenesis as an indication for extensive cell proliferation. Herein, silver nanoclusters (Ag NCs) templated by polymer and unmodified gold nanoparticles (Au NPs) are designed as a new colorimetric platform for sensitively differentiating telomere DNA with different lengths, monitoring G-quadruplex and dsDNA. Ag NCs can produce the aggregation of Au NPs, so the color of Au NPs changes to blue and the absorption peak moves to 700 nm. While the telomere DNA can protect Au NPs from aggregation, the color turns to red again and the absorption band blue shift. Benefiting from the obvious color change, we can differentiate the length of telomere DNA by naked eyes. As the length of telomere DNA is longer, the variation of color becomes more noticeable. The detection limits of telomere DNA containing 10, 22, 40, 64 bases are estimated to be 1.41, 1.21, 0.23 and 0.22 nM, respectively. On the other hand, when telomere DNA forms G-quadruplex in the presence of K, or dsDNA with complementary sequence, both G-quadruplex and dsDNA can protect Au NPs better than the unfolded telomere DNA. Hence, a new colorimetric platform for monitoring structure conversion of DNA is established by Ag NCs-Au NPs system, and to prove this type of application, a selective K+ sensor is developed. (C) 2018 Elsevier B.V. All rights reserved.
KeywordAu Nanoparticles Telomere Dna Ag Nanoclusters G-quadruplex Duplex Dna Colorimetric Detection
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.saa.2018.02.024
WOS KeywordIN-SITU HYBRIDIZATION ; SUPRAMOLECULAR CHEMISTRY ; COLORECTAL-CARCINOMA ; AG NANOCLUSTERS ; FLUORESCENT ; PROTECTION ; CELLS ; POLYETHYLENEIMINE ; AGGREGATION ; EXPRESSION
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China (Youth Fund Project)(21405093) ; Natural Science Foundation of Shandong Province(ZR2015CM040) ; Scientific Research Foundation of Qufu Normal University(BSQD20130117)
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000428833000017
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/13362
Collection中国科学院西北高原生物研究所
Affiliation1.Qufu Normal Univ, Key Lab Life Organ Anal, Qufu 273165, Shandong, Peoples R China
2.Qufu Normal Univ, Key Lab Pharmaceut Intermediates & Anal Nat Med, Qufu 273165, Shandong, Peoples R China
3.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810001, Qinghai, Peoples R China
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GB/T 7714
Qu, Fei,Chen, Zeqiu,You, Jinmao,et al. A colorimetric platform for sensitively differentiating telomere DNA with different lengths, monitoring G-quadruplex and dsDNA based on silver nanoclusters and unmodified gold nanoparticles[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,2018,196:148-154.
APA Qu, Fei,Chen, Zeqiu,You, Jinmao,&Song, Cuihua.(2018).A colorimetric platform for sensitively differentiating telomere DNA with different lengths, monitoring G-quadruplex and dsDNA based on silver nanoclusters and unmodified gold nanoparticles.SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,196,148-154.
MLA Qu, Fei,et al."A colorimetric platform for sensitively differentiating telomere DNA with different lengths, monitoring G-quadruplex and dsDNA based on silver nanoclusters and unmodified gold nanoparticles".SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 196(2018):148-154.
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