Dextran-coated nanoparticles as immunosensing platforms: Consideration of polyaldehyde density, nanoparticle size and functionality
dc.contributor.author | Gao, Shipeng | |
dc.contributor.author | Torrente Rodríguez, Rebeca M. | |
dc.contributor.author | Pedrero Muñoz, María | |
dc.contributor.author | Pingarrón Carrazón, José Manuel | |
dc.contributor.author | Campuzano Ruiz, Susana | |
dc.contributor.author | Rocha Martin, Javier | |
dc.contributor.author | Guisán, José M. | |
dc.date.accessioned | 2023-06-22T10:43:12Z | |
dc.date.available | 2023-06-22T10:43:12Z | |
dc.date.issued | 2022-05-21 | |
dc.description | CRUE-CSIC (Acuerdos Transformativos 2022) | |
dc.description.abstract | Magnetic nanoparticles (MNPs) can be used as antibody carriers in a wide range of immunosensing applications. The conjugation chemistry for preparing antibody-MNP bionanohybrids should assure the nanoparticle’s colloidal dispersity, directional conformation and high biofunctionality retention of attached antibodies. In this work, peroxidase (HRP) was selected as model target analyte, and stable antibody-MNP conjugates were prepared using polyaldehyde-dextrans as multivalent linkers, also to prevent nanoparticles agglomeration and steric shielding of non-specific proteins. Under the manipulation of the oxidation variables, MNP-conjugated antibody showed the highest Fab accessibility, of 1.32 μmol analyte per μmol antibody, corresponding to 139 μmol aldehyde per gram of nanocarrier (5 mM NaIO4, 4 h). Demonstrating anti-interference advantage up to 10% serum, colorimetric immunoassay gave a detection limit (LOD) of 300 ng mL− 1 , while electrochemical transduction led to a considerable (680 times) improvement, with a LOD of 0.44 ng mL− 1 . In addition, polyaldehydedextran showed priority over polycarboxylated-dextran as the multivalent antibody crosslinker for MNPs in terms of sensitivity and LOD value, while immunosensors constructed with carboxylated magnetic microbeads (HOOC-MBs) outperformed MNPs-based immunoplatforms. This work sheds light on the importance of surface chemistry (type and density of functional groups) and the dimension (nanosize vs micrometer) of magnetic carriers to conjugate antibodies with better directional orientation and improve the analytical performance of the resulting immunosensors. | |
dc.description.department | Sección Deptal. de Bioquímica y Biología Molecular (Biológicas) | |
dc.description.department | Depto. de Química Analítica | |
dc.description.faculty | Fac. de Ciencias Biológicas | |
dc.description.faculty | Fac. de Ciencias Químicas | |
dc.description.refereed | TRUE | |
dc.description.sponsorship | Ministerio de Ciencia e Innovación (MICINN) | |
dc.description.sponsorship | Comunidad de Madrid | |
dc.description.sponsorship | China Scholarship Council | |
dc.description.status | pub | |
dc.eprint.id | https://eprints.ucm.es/id/eprint/72449 | |
dc.identifier.doi | 10.1016/j.talanta.2022.123549 | |
dc.identifier.issn | 0039-9140 | |
dc.identifier.officialurl | https://doi.org/10.1016/j.talanta.2022.123549 | |
dc.identifier.relatedurl | https://www.sciencedirect.com/science/article/pii/S0039914022003459#ack0010 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14352/71496 | |
dc.journal.title | Talanta | |
dc.language.iso | eng | |
dc.page.initial | 123549 | |
dc.publisher | Elsevier | |
dc.relation.projectID | (PID2019-103899RB-I00) | |
dc.relation.projectID | TRANSNANOAVANSENS-CM Program (S2018/NMT-4349); (IND2018/ BIO-9480) | |
dc.relation.projectID | (201808440415) | |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 España | |
dc.rights.accessRights | open access | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/3.0/es/ | |
dc.subject.cdu | 577.1 | |
dc.subject.cdu | 539.2:620.1 | |
dc.subject.keyword | Iron oxide nanoparticles | |
dc.subject.keyword | Dextran-coated nanoparticles | |
dc.subject.keyword | Antibody orientation | |
dc.subject.keyword | Immunosensors | |
dc.subject.ucm | Bioquímica (Química) | |
dc.subject.ucm | Química analítica (Química) | |
dc.subject.ucm | Biotecnología | |
dc.subject.unesco | 2301 Química Analítica | |
dc.subject.unesco | 3399 Otras Especialidades Tecnológicas | |
dc.title | Dextran-coated nanoparticles as immunosensing platforms: Consideration of polyaldehyde density, nanoparticle size and functionality | |
dc.type | journal article | |
dc.volume.number | 247 | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | 422f8844-54d1-4615-98e8-ef5a0c7e3519 | |
relation.isAuthorOfPublication | 8808f99c-5f56-4562-839a-517626c76dad | |
relation.isAuthorOfPublication | 6945fb1e-9c48-459d-b994-e64328c3e79b | |
relation.isAuthorOfPublication.latestForDiscovery | 422f8844-54d1-4615-98e8-ef5a0c7e3519 |
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