Your browser doesn't support javascript.
loading
Self-Enriching Electrospun Biosensors for Impedimetric Sensing of Zika Virus.
Frias, Isaac A M; Vega Gonzales Gil, Laura Helena; Cordeiro, Marli T; Oliveira, Maria D L; Andrade, Cesar A S.
Afiliação
  • Frias IAM; Therapeutic Innovation Program, Federal University of Pernambuco, Recife 50670-901, Brazil.
  • Vega Gonzales Gil LH; Biochemistry Department, Federal University of Pernambuco, Recife 50670-901, Brazil.
  • Cordeiro MT; Institute Aggeu Magalhães (IAM), Oswaldo Cruz Foundation (Fiocruz), Recife 21040-900, Brazil.
  • Oliveira MDL; Institute Aggeu Magalhães (IAM), Oswaldo Cruz Foundation (Fiocruz), Recife 21040-900, Brazil.
  • Andrade CAS; Therapeutic Innovation Program, Federal University of Pernambuco, Recife 50670-901, Brazil.
ACS Appl Mater Interfaces ; 14(1): 41-48, 2022 Jan 12.
Article em En | MEDLINE | ID: mdl-34932313
Zika virus (ZIKV) infection is associated with the Guillain-Barré syndrome, and when non-vector congenital transmission occurs, fetal brain abnormalities are expected. After ZIKV infection, the blood, breast milk, and other body fluids contain low viral loads. Their detection is challenging as it requires the processing of larger input volumes of the clinical samples. Pre-enrichment is a valuable strategy to increase the analyte concentration. Therefore, the authors propose the use of a hierarchal composite polyaniline-(electrospun nanofiber) hydrogel mat (ENM) for the simultaneous enrichment and impedimetric sensing of ZIKV viral particles. The electrospinning conditions of polyvinyl alcohol and alginate, including blend formulation, were optimized through a factorial design. Disintegration and gelatinization were controlled via cross-linking to improve the hydrogel properties. Hierarchization was achieved by in situ chemical deposition of conductive polyaniline. The carboxyl groups of the ENM were used for the covalent immobilization of anti-ZIKV polyclonal antibodies used in the specific recognition of ZIKV within the medium of Vero cell culture. The specific capture and desorption of virions were studied at different pHs. ENMs were characterized by scanning electron microscopy and FTIR. Atomic force microscopy along with UV-vis and electrochemical impedance spectroscopies was used to monitor the antibody immobilization, ZIKV capture, and elution processes. Our results show that 14.2 mg (0.25 cm3) of ENM can capture 38.7 ± 2.5 µg of ZIKV with a desorption rate of 99.97% (38.29 ± 2.7 µg ZIKV), which is reusable for at least three times. Therefore, the capture capacity (micrograms of ZIKV captured per milligram of ENM) of polyaniline-hierarchized mats was 2.72 µg ZIKV/mg. The impedance LOD value was determined to be 2.76 µg of ZIKV particles (approximately 6.6 × 103 PFU/mL). As a result, we present a fast small-scale purification system that can simultaneously monitor ZIKV electrochemically and optically.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Técnicas Biossensoriais / Carga Viral / Alginatos / Nanofibras / Zika virus / Compostos de Anilina Limite: Animals Idioma: En Revista: ACS Appl Mater Interfaces Assunto da revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Técnicas Biossensoriais / Carga Viral / Alginatos / Nanofibras / Zika virus / Compostos de Anilina Limite: Animals Idioma: En Revista: ACS Appl Mater Interfaces Assunto da revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos