Literature DB >> 33356556

TNF-α detection using gold nanoparticles as a surface-enhanced Raman spectroscopy substrate.

Elizabeth Loredo-García1, Alejandra Ortiz-Dosal2, Juan Manuel Núñez-Leyva2, José Luis Cuellar Camacho3, Jorge Alejandro Alegría-Torres4, Lizeth García-Torres5, Hugo Ricardo Navarro-Contreras1, Eleazar Samuel Kolosovas-Machuca1.   

Abstract

Background: TNF-α is a cytokine involved in inflammation. Surface-enhanced Raman spectroscopy (SERS) could be useful in its detection. Aim: Identify the TNF-α in an aqueous solution, using gold nanoparticles (AuNPs) as a SERS substrate. Materials & methods: Raman and SERS spectra were obtained from TNF-α samples, combined with AuNPs, with decreasing concentrations of TNF-α. 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-α/AuNPs (∼9.6 nm). Raman bands obtained were associated with aromatic amino acid side chains. We observe Raman signals for TNF-α concentrations as low as 0.125 pg/ml.
Conclusion: TNF-α signal at physiological concentrations was determined with SERS.

Entities:  

Keywords:  SERS; TNF-α; biomarkers; cytokines; gold nanoparticles

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Year:  2020        PMID: 33356556     DOI: 10.2217/nnm-2020-0307

Source DB:  PubMed          Journal:  Nanomedicine (Lond)        ISSN: 1743-5889            Impact factor:   5.307


  1 in total

1.  Computational and Experimental Analysis of Gold Nanorods in Terms of Their Morphology: Spectral Absorption and Local Field Enhancement.

Authors:  Juan Manuel Núñez-Leyva; Eleazar Samuel Kolosovas-Machuca; John Sánchez; Edgar Guevara; Alexander Cuadrado; Javier Alda; Francisco Javier González
Journal:  Nanomaterials (Basel)       Date:  2021-06-28       Impact factor: 5.076

  1 in total

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