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Wechsler ME, Jocelyn Dang HKH, Simmonds SP, Bahrami K, Wyse JM, Dahlhauser SD, Reuther JF, VandeWalle AN, Anslyn EV, Peppas NA. Electrostatic and Covalent Assemblies of Anionic Hydrogel-Coated Gold Nanoshells for Detection of Dry Eye Biomarkers in Human Tears. Nano Lett 2021; 21:8734-8740. [PMID: 34623161 PMCID: PMC8588787 DOI: 10.1021/acs.nanolett.1c02941] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Although dry eye is highly prevalent, many challenges exist in diagnosing the symptom and related diseases. For this reason, anionic hydrogel-coated gold nanoshells (AuNSs) were used in the development of a label-free biosensor for detection of high isoelectric point tear biomarkers associated with dry eye. A custom, aldehyde-functionalized oligo(ethylene glycol)acrylate (Al-OEGA) was included in the hydrogel coating to enhance protein recognition through the formation of dynamic covalent (DC) imine bonds with solvent-accessible lysine residues present on the surface of select tear proteins. Our results demonstrated that hydrogel-coated AuNSs, composed of monomers that form ionic and DC bonds with select tear proteins, greatly enhance protein recognition due to changes in the maximum localized surface plasmon resonance wavelength exhibited by AuNSs in noncompetitive and competitive environments. Validation of the developed biosensor in commercially available pooled human tears revealed the potential for clinical translation to establish a method for dry eye diagnosis.
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Affiliation(s)
- Marissa E Wechsler
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - H K H Jocelyn Dang
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Susana P Simmonds
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Kiana Bahrami
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Jordyn M Wyse
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Samuel D Dahlhauser
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - James F Reuther
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, United States
| | - Abigail N VandeWalle
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Eric V Anslyn
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Nicholas A Peppas
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Surgery and Perioperative Care, Dell Medical School, The University of Texas at Austin, Austin, Texas 78712, United States
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Wechsler ME, Dang HKHJ, Dahlhauser SD, Simmonds SP, Reuther JF, Wyse JM, VandeWalle AN, Anslyn EV, Peppas NA. Nanogel receptors for high isoelectric point protein detection: influence of electrostatic and covalent polymer-protein interactions. Chem Commun (Camb) 2020; 56:6141-6144. [PMID: 32364214 PMCID: PMC7377432 DOI: 10.1039/d0cc02200d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
An aldehyde acrylate-based functional monomer was incorporated into poly(N-isopropylacrylamide-co-methacrylic acid) nanogels for use as protein receptors. The aldehyde component forms dynamic imines with surface exposed lysine residues, while carboxylic acid/carboxylate moieties form electrostatic interactions with high isoelectric point proteins. Together, these interactions effect protein adsorption and recognition.
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Affiliation(s)
- Marissa E Wechsler
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA
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Dahlhauser SD, Escamilla PR, VandeWalle AN, York JT, Rapagnani RM, Shei JS, Glass SA, Coronado JN, Moor SR, Saunders DP, Anslyn EV. Sequencing of Sequence-Defined Oligourethanes via Controlled Self-Immolation. J Am Chem Soc 2020; 142:2744-2749. [PMID: 31986251 DOI: 10.1021/jacs.9b12818] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Sequence-defined polymers show promise for biomimetics, self-assembly, catalysis, and information storage, wherein the primary structure begets complex chemical processes. Here we report the solution-phase and the high-yielding solid-phase syntheses of discrete oligourethanes and methods for their self-immolative sequencing, resulting in rapid and robust characterization of this class of oligomers and polymers, without the use of MS/MS. Crucial to the sequencing is the inherent reactivity of the terminal alcohol to "unzip" the oligomers, in a controlled and iterative fashion, releasing each monomer as a 2-oxazolidinone. By monitoring the self-immolation reaction via LC/MS, an applied algorithm rapidly produces the sequence of the oligourethane. Not only does this process provide characterization of structurally complex molecules, it works as a reader of molecular information.
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Affiliation(s)
- Samuel D Dahlhauser
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - P Rogelio Escamilla
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Abigail N VandeWalle
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Jordan T York
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Rachel M Rapagnani
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Jasper S Shei
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Samuel A Glass
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Jaime N Coronado
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Sarah R Moor
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Douglas P Saunders
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Eric V Anslyn
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
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