Ultrasensitive colorimetric carcinoembryonic antigen biosensor based on hyperbranched rolling circle amplification
文献信息
Kai Liang, Shuiting Zhai, Zhidong Zhang, Xiaoyang Fu, Jingwei Shao, Zhenyu Lin, Bin Qiu, Guo-nan Chen
In this study, a hyperbranched rolling circle amplification (HRCA)-based colorimetric biosensor for carcinoembryonic antigen (CEA) is developed with high sensitivity and specificity. A CEA aptamer can bind with its target (CEA) to form a complex due to their high affinity, and the introduced CDNA cannot hybridize with the aptamer. Thus, free CDNA can propagate the HRCA reaction to form a large number of single-stranded DNA (ss-DNA). ss-DNA can be easily adsorbed onto AuNPs and prevent salt-induced AuNPs aggregation, which causes the change in the color of the system. It is found that the absorbance intensity ratio (A520/A660) has a linear relationship with the concentration of the target in the range of 5 pM−0.5 nM, and the detection limit is as low as 2 pM (S/N = 3).
相关文献
Formation and consumption of single-ring aromatic hydrocarbons and their precursors in premixed acetylene, ethylene and benzene flames
Henning Richter, Jack B. Howard
DOI: 10.1039/B110089K
Low-frequency depolarized Raman-spectral density of liquid water from femtosecond optical Kerr-effect measurements: Lineshape analysis of restricted translational modes
Kathrin Winkler, Jörg Lindner, Peter Vöhringer
DOI: 10.1039/B200299J
Pulsed laser deposition of La0.6Ca0.4CoO3 (LCCO) films. A promising metal-oxidecatalyst for air based batteries
M. J. Montenegro, M. Döbeli, T. Lippert, S. Müller, B. Schnyder, A. Weidenkaff, A. Wokaun
DOI: 10.1039/B200120A
Aggregate formation in mixed monolayers at the air–water interface of metal-complex tetracationic water-soluble porphyrins attached to a phospholipid matrix
José M. Pedrosa, Marta Pérez, Inmaculada Prieto, María Teresa Martín-Romero, Dietmar Möbius, Luis Camacho
DOI: 10.1039/B108360K
Determination of adsorption energies and kinetic parameters by isosteric methods
Wolfgang Ranke, Yvonne Joseph
DOI: 10.1039/B200363E
Solubilization of organic compounds into as-synthesized spherical mesoporous silica
Yoshikazu Miyake, Toshimi Yumoto, Hajime Kitamura, Taichi Sugimoto
DOI: 10.1039/B200074C
Implementation of RI-CC2 triplet excitation energies with an application to trans-azobenzene
Kasper Hald
DOI: 10.1039/B110847F
Phase synchronization of nonidentical chaotic electrochemical oscillators
István Z. Kiss, John L. Hudson
DOI: 10.1039/B200716A
Solvent distribution in non-ionic surfactant monolayers
R. K. Thomas
DOI: 10.1039/B108698G
Glycidol dimer: anatomy of a molecular handshake
Nicole Borho, Martin A. Suhm
DOI: 10.1039/B111123J
您可能还喜欢
什么是5-Fluoro-4-iodo-2-methylaniline(CAS号:307306-08-7)?
5-氟-4-碘-2-甲氨基苯属于芳香族化合物,其分子式为C8H7FN2I。该化合物具有一定的反应活性,在有机合成和药物化学领域有一定的应用。
4-氟-3-硝基三氟甲苯(CAS号:367-86-2)通常如何合成?
4-氟-3-硝基三氟甲苯通常通过将三氟甲基苯在酸性条件下催化氧化为三氟甲基硝基苯,然后进行氟化反应得到目标化合物。该过程需要使用催化剂,如三氟乙酸,反应产率较高...
6-氯-9-(2,3,5-三苯甲酰氧基-2-C-甲基-beta-D-呋喃核糖基)-9H-嘌呤(CAS号:205171-05-7)的物理化学性质是什么?
该化合物为白色至类白色晶体,分子量约为1046.95。它在水中几乎不溶,在有机溶剂如乙腈和甲醇中具有一定的溶解性。该化合物具有良好的化学稳定性和生物活性。
如何储存6-氟喹啉-4-羧酸(CAS号:220844-73-5)?
6-氟喹啉-4-羧酸应储存在阴凉、干燥、通风良好的地方,避免阳光直射。储存在密闭容器中,避免与空气中的水分接触。储存温度应控制在室温以下,避免高温。
(2S,2'S,3S,3'S)-3,3'-di-tert-butyl-4,4'-bis(2,6-dimethoxyphenyl)-2,2',3,3'-tetrahydro-2,2'-bibenzo[d][1,3]oxaphosphole(CAS号:1435940-21-8)通常如何合成?
该化合物通常通过芳香族化合物的亲核取代反应合成,首先将2,6-二甲氧基苯基引入到双环结构中,然后通过特定条件下的还原或氧化反应引入二叔丁基。反应过程中使用了钯作...
如何储存KY02111(CAS号:1118807-13-8)?
KY02111应储存于阴凉、干燥、通风良好的地方,避免阳光直射和高温环境。应使用合适的密闭容器储存,并确保容器密封良好,防止水分和潮气进入。在储存期间,应注意检...
如何储存4-(4-氯苯氧基)丁酸乙酯(CAS号:59227-79-1)?
4-(4-氯苯氧基)丁酸乙酯应储存在阴凉、干燥、通风良好的地方,远离火源和热源。避免阳光直射,防止容器破裂导致泄漏。储存时应保持容器密封,避免与空气中的水蒸气接...
4-庚基苯乙酮(CAS号:37593-03-6)安全吗?
4-庚基苯乙酮相对安全,但在使用和储存时仍需注意。应避免吸入其蒸气,避免皮肤接触,使用时需佩戴防护眼镜和手套。储存时应远离火源和热源,保持容器密封,放置于阴凉、...
什么是乙基2-氨基-4-(3-溴苯基)噻吩-3-羧酸乙酯(CAS号:438218-48-5)?
乙基2-氨基-4-(3-溴苯基)噻吩-3-羧酸乙酯是一种有机化合物,分子式为C16H12BrN2O2S。它是一种含有噻吩环、氨基、溴苯基和羧酸酯结构的化合物。这...
什么是(9ci)-2-氨基-6-甲基-苯甲酰胺(CAS号:1885-31-0)?
(9ci)-2-氨基-6-甲基-苯甲酰胺是一种化学化合物,其英文名称为2-Amino-6-methylbenzamide,CAS号为1885-31-0。该化合物...
来源期刊
Analyst

Analyst publishes analytical and bioanalytical research that reports premier fundamental discoveries and inventions, and the applications of those discoveries, unconfined by traditional discipline barriers.














