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TNF-α detection using gold nanoparticles as a surface-enhanced Raman spectroscopy substrate
被引:3
|作者:
Loredo-Garcia, Elizabeth
[1
]
Ortiz-Dosal, Alejandra
[2
]
Manuel Nunez-Leyva, Juan
[2
]
Cuellar Camacho, Jose Luis
[3
]
Alejandro Alegria-Torres, Jorge
[4
]
Garcia-Torres, Lizeth
[5
]
Ricardo Navarro-Contreras, Hugo
[1
]
Samuel Kolosovas-Machuca, Eleazar
[1
]
机构:
[1] Univ Autonoma San Luis Potosi, Coordinac Innovac & Aplicac Ciencia & Tecnol, 550 Sierra Leona Av, San Luis Potosi 78210, San Luis Potosi, Mexico
[2] Univ Autonoma San Luis Potosi, Ingn & Ciencia Mat DICIM UASLP, 550 Sierra Leona Av, San Luis Potosi 78210, San Luis Potosi, Mexico
[3] Free Univ Berlin, Inst Chem & Biochem, Takustr 3, D-14195 Berlin, Germany
[4] Univ Guanajuato, Dept Farm, Div Ciencias Nat & Exactas, Noria Alta S-N, Guanajuato 36050, Gto, Mexico
[5] Univ Ctr Mexico, Lab Invest Mol Nutr LIMON, UCEM, Capitan Caldera 75, San Luis Potosi 78250, San Luis Potosi, Mexico
关键词:
biomarkers;
cytokines;
gold nanoparticles;
SERS;
TNF-α
TUMOR-NECROSIS-FACTOR;
AMINO-ACIDS;
OPTICAL-PROPERTIES;
SERS;
D O I:
10.2217/nnm-2020-0307
中图分类号:
Q81 [生物工程学(生物技术)];
Q93 [微生物学];
学科分类号:
071005 ;
0836 ;
090102 ;
100705 ;
摘要:
Background: TNF-alpha is a cytokine involved in inflammation. Surface-enhanced Raman spectroscopy (SERS) could be useful in its detection. Aim: Identify the TNF-alpha in an aqueous solution, using gold nanoparticles (AuNPs) as a SERS substrate. Materials & methods: Raman and SERS spectra were obtained from TNF-alpha samples, combined with AuNPs, with decreasing concentrations of TNF-alpha. The samples were analyzed using optical transmission spectroscopy, dynamic light scattering, and transmission electron microscopy. Results: Transmission electron microscopy/dynamic light scattering determined a change in the average diameter of the TNF-alpha/AuNPs (similar to 9.6 nm). Raman bands obtained were associated with aromatic amino acid side chains. We observe Raman signals for TNF-alpha concentrations as low as 0.125 pg/ml. Conclusion: TNF-alpha signal at physiological concentrations was determined with SERS.
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页码:51 / 61
页数:11
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