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Liguori A, Zhao J, Di Gesù R, De Marco R, Gualandi C, Calonghi N, Pollicino A, Gentilucci L, Focarete ML. Peptide direct growth on poly(acrylic acid)/poly(vinyl alcohol) electrospun fibers coated with branched poly(ethylenimine): A solid-phase approach for scaffolds biofunctionalization. Colloids Surf B Biointerfaces 2024; 241:114052. [PMID: 38917667 DOI: 10.1016/j.colsurfb.2024.114052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 06/03/2024] [Accepted: 06/19/2024] [Indexed: 06/27/2024]
Abstract
Due to their resemblance to the fibrillar structure of the extracellular matrix, electrospun nanofibrous meshes are currently used as porous and mechanically stable scaffolds for cell culture. In this study, we propose an innovative methodology for growing peptide sequences directly onto the surface of electrospun nanofibers. To achieve this, electrospun fibers were produced from a poly(acrylic acid)/poly(vinyl alcohol) blend that was thermally crosslinked and subjected to a covalent coating of branched poly(ethylenimine). The exposed amino functionalities on the fiber surface were then used for the direct solid-phase synthesis of the RGD peptide sequence. In contrast to established strategies, mainly involving the grafting of pre-synthesized peptides onto the polymer chains before electrospinning or onto the nanofibers surface, this method allows for the concurrent synthesis and anchoring of peptides to the substrate, with potential applications in combinatorial chemistry. The incorporation of this integrin-binding motive significantly enhanced the nanofibers' ability to capture human cervical carcinoma (HeLa) cells, selected as a proof of concept to assess the functionalities of the developed material.
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Affiliation(s)
- Anna Liguori
- Department of Chemistry "G. Ciamician" and INSTM UdR of Bologna, University of Bologna, via Selmi 2, Bologna 40126, Italy
| | - Junwei Zhao
- Department of Chemistry "G. Ciamician" and INSTM UdR of Bologna, University of Bologna, via Selmi 2, Bologna 40126, Italy
| | - Roberto Di Gesù
- Department of Chemistry "G. Ciamician" and INSTM UdR of Bologna, University of Bologna, via Selmi 2, Bologna 40126, Italy; Ri.MED Foundation, Bandiera st. 11, Palermo 90133, Italy
| | - Rossella De Marco
- Department of Chemistry "G. Ciamician" and INSTM UdR of Bologna, University of Bologna, via Selmi 2, Bologna 40126, Italy
| | - Chiara Gualandi
- Department of Chemistry "G. Ciamician" and INSTM UdR of Bologna, University of Bologna, via Selmi 2, Bologna 40126, Italy; Interdepartmental Center for Industrial Research on Advanced Applications in Mechanical Engineering and Materials Technology, CIRI-MAM, University of Bologna, Viale Risorgimento, 2, Bologna 40136, Italy
| | - Natalia Calonghi
- Department of Pharmacy and Biotechnology, University of Bologna, via Irnerio 48, Bologna 40126, Italy
| | - Antonino Pollicino
- Department of Civil Engineering and Architecture, University of Catania, via S. Sofia 64, Catania 95125, Italy
| | - Luca Gentilucci
- Department of Chemistry "G. Ciamician" and INSTM UdR of Bologna, University of Bologna, via Selmi 2, Bologna 40126, Italy; Health Sciences & Technologies (HST) CIRI, University of Bologna, Via Tolara di Sopra 41/E, Ozzano Emilia Bologna 40064, Italy.
| | - Maria Letizia Focarete
- Department of Chemistry "G. Ciamician" and INSTM UdR of Bologna, University of Bologna, via Selmi 2, Bologna 40126, Italy; Health Sciences & Technologies (HST) CIRI, University of Bologna, Via Tolara di Sopra 41/E, Ozzano Emilia Bologna 40064, Italy.
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Venditti I, Cartoni A, Fontana L, Testa G, Scaramuzzo F, Faccini R, Terracciano CM, Camillocci ES, Morganti S, Giordano A, Scotognella T, Rotili D, Dini V, Marini F, Fratoddi I. Y3+ embedded in polymeric nanoparticles: Morphology, dimension and stability of composite colloidal system. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.082] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Paik BA, Blanco MA, Jia X, Roberts CJ, Kiick KL. Aggregation of poly(acrylic acid)-containing elastin-mimetic copolymers. SOFT MATTER 2015; 11:1839-50. [PMID: 25611563 PMCID: PMC4376481 DOI: 10.1039/c4sm02525c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Polymer-peptide conjugates were produced via the copper-catalyzed azide-alkyne cycloaddition of poly(tert-butyl acrylate) (PtBA) and elastin-like peptides. An azide-functionalized polymer was produced via atom transfer radical polymerization (ATRP) followed by conversion of bromine end groups to azide groups. Subsequent reaction of the polymer with a bis-alkyne-functionalized, elastin-like peptide proceeded with high efficiency, yielding di- and tri-block conjugates, which after deprotection, yielded poly(acrylic acid) (PAA)-based diblock and triblock copolymers. These conjugates were solubilized in dimethyl formamide, and addition of phosphate buffered saline (PBS) induced aggregation. The presence of polydisperse spherical aggregates was confirmed by dynamic light scattering and transmission electron microscopy. Additionally, a coarse-grained molecular model was designed to reasonably capture inter- and intramolecular interactions for the conjugates and its precursors. This model was used to assess the effect of the different interacting molecular forces on the conformational thermodynamic stability of the copolymers. Our results indicated that the PAA's ability to hydrogen-bond with both itself and the peptide is the main interaction for stabilizing the diblocks and triblocks and driving their self-assembly, while interactions between peptides are suggested to play only a minor role on the conformational and thermodynamic stability of the conjugates.
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Affiliation(s)
- Bradford A Paik
- Department of Materials Science and Engineering, Delaware Biotechnology Institute, University of Delaware, Newark, DE 19716, USA.
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Huang J, Wang D, Lu Y, Li M, Xu W. Surface zwitterionically functionalized PVA-co-PE nanofiber materials by click chemistry. RSC Adv 2013. [DOI: 10.1039/c3ra41505h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Zhu J, Sun G. Preparation and photo-oxidative functions of poly(ethylene-co-methacrylic acid) (PE-co-MAA) nanofibrous membrane supported porphyrins. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16703d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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