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O'Connor CE, Neufeld A, Fortin CL, Johansson F, Mene J, Saxton SH, Simmonds SP, Kopyeva I, Gregorio NE, DeForest CA, Witten DM, Stevens KR. Highly Parallel Tissue Grafting for Combinatorial In Vivo Screening. bioRxiv 2023:2023.03.16.533029. [PMID: 36993278 PMCID: PMC10055160 DOI: 10.1101/2023.03.16.533029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Material- and cell-based technologies such as engineered tissues hold great promise as human therapies. Yet, the development of many of these technologies becomes stalled at the stage of pre-clinical animal studies due to the tedious and low-throughput nature of in vivo implantation experiments. We introduce a 'plug and play' in vivo screening array platform called Highly Parallel Tissue Grafting (HPTG). HPTG enables parallelized in vivo screening of 43 three-dimensional microtissues within a single 3D printed device. Using HPTG, we screen microtissue formations with varying cellular and material components and identify formulations that support vascular self-assembly, integration and tissue function. Our studies highlight the importance of combinatorial studies that vary cellular and material formulation variables concomitantly, by revealing that inclusion of stromal cells can "rescue" vascular self-assembly in manner that is material-dependent. HPTG provides a route for accelerating pre-clinical progress for diverse medical applications including tissue therapy, cancer biomedicine, and regenerative medicine.
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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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Simmonds SP. Curative medicine or community health? Appropriate health services with refugees. J Trop Med Hyg 1980; 83:49-52. [PMID: 7381981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Health teams from the United Kingdom are being increasingly sent as relief workers to refugee camps all over the world. It is proposed that a re-assessment of the type, skills and attitudes of health workers recruited to work among refugees is urgently needed.
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Simmonds SP, Brown H. Curative medicine or community health? Appropriate health services with refugees *. Disasters 1980; 4:107-110. [PMID: 20958454 DOI: 10.1111/j.1467-7717.1980.tb00255.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- S P Simmonds
- Ross Institute of Tropical Hygiene London School of Hygiene and Tropical Medicine London, U.K
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Fawcett IW, Merchant JA, Simmonds SP, Pepys J. The effect of sodium cromoglycate, beclomethasone diproprionate and salbutamol on the ventilatory response to cotton dust in mill workers. Br J Dis Chest 1978; 72:29-38. [PMID: 414773 DOI: 10.1016/0007-0971(78)90005-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A double-blind placebo controlled study of sodium cromoglycate, beclomethasone dipropionate and salbutamol by inhalation was designed to test their effect on respiratory symptoms and changes in ventilatory capacity in cotton mill workers. All three drugs showed some beneficial effect. Salbutamol was the most effective drug studied, in all groups of workers. Beclomethasone dipropionate was also significantly effective particularly in workers with byssinosis or exertional dyspnoea. Sodium cromoglycate was the least effective of the three. Possible mechanisms of action of these drugs are described.
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