Folic Acid-Conjugated Cellulose Nanocrystals Show High Folate-Receptor Binding Affinity and Uptake by KB and Breast Cancer Cells

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dc.contributor.authorBittleman, Katelyn Roseen
dc.contributor.authorDong, Shupingen
dc.contributor.authorRoman, Marenen
dc.contributor.authorLee, Yong Wooen
dc.contributor.departmentBiomedical Engineering and Mechanicsen
dc.contributor.departmentSustainable Biomaterialsen
dc.contributor.departmentMacromolecules Innovation Instituteen
dc.contributor.departmentBiomedical Engineering and Mechanicsen
dc.date.accessioned2018-11-09T15:02:41Zen
dc.date.available2018-11-09T15:02:41Zen
dc.date.issued2018-10-24en
dc.description.abstractThe study evaluates cellulose nanocrystals (CNCs) as nanocarriers for targeted, intracellular delivery of molecular agents. CNCs were labeled with fluorescein-5′-isothiocyanate as an imaging agent and conjugated to folic acid (FA) as a targeting ligand. The CNC conjugates were characterized by UV–vis spectroscopy, ζ-potential analysis, dynamic light scattering, and atomic force microscopy. Cellular binding/uptake of the FA-conjugated CNCs by KB and MDA-MB-468 cells was quantified with cellular uptake assays. Internalization of the particles was confirmed by confocal microscopy. Uptake mechanisms were determined by inhibition studies with chlorpromazine and genistein. Binding affinity was qualitatively assessed with a free folate inhibition assay. Both KB and MDA-MB-468 cells exhibited significant and folate-receptor specific binding/uptake of FA-conjugated CNCs. Clathrin-mediated endocytosis was a significant uptake mechanism in both cell types, whereas caveolae-mediated endocytosis only played a significant role in MDA-MB-468 cells. Uptake inhibition of FA-conjugated CNCs by KB cells required high concentrations (>1 mM) of free FA. The observed FR-specific internalization of FA-conjugated CNCs by FR-positive cancer cells and tumors and their remarkable high affinity for the FR demonstrate the great potential of CNCs as novel nanocarriers for imaging agents and chemotherapeutics in the early detection and treatment of cancer.en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1021/acsomega.8b01619en
dc.identifier.issn2470-1343en
dc.identifier.issue10en
dc.identifier.urihttp://hdl.handle.net/10919/85811en
dc.identifier.volume3en
dc.language.isoenen
dc.publisherAmerican Chemical Societyen
dc.rightsCreative Commons Attribution-NonCommercial 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/en
dc.subjectDrug delivery systemsen
dc.subjectFluorescence imagingen
dc.subjectImaging agentsen
dc.subjectNanocrystalsen
dc.subjectPharmacologyen
dc.subjectProteinsen
dc.titleFolic Acid-Conjugated Cellulose Nanocrystals Show High Folate-Receptor Binding Affinity and Uptake by KB and Breast Cancer Cellsen
dc.title.serialACS Omegaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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