Membrane-Disrupting Nanofibrous Peptide Hydrogels

Biplab Sarkar, Zain Siddiqui, Peter K. Nguyen, Namita Dube, Wanyi Fu, Steven Park, Shivani Jaisinghani, Reshma Paul, Stephen D. Kozuch, Daiyong Deng, Patricia Iglesias-Montoro, Mengyan Li, David Sabatino, David S. Perlin, Wen Zhang, Jagannath Mondal, Vivek A. Kumar

Research output: Contribution to journalArticle

Abstract

Self-assembled peptide nanofibers can form biomimetic hydrogels at physiological pH and ionic strength through noncovalent and reversible interactions. Inspired by natural antimicrobial peptides, we designed a class of cationic amphiphilic self-assembled peptides (CASPs) that self-assemble into thixotropic nanofibrous hydrogels. These constructs employ amphiphilicity and high terminal charge density to disrupt bacterial membranes. Here, we focus on three aspects of the self-assembly of these hydrogels: (a) the material properties of the individual self-assembled nanofibers, (b) emergence of bulk-scale elasticity in the nanofibrous hydrogel, and (c) trade-off between the desirable material properties and antimicrobial efficacy. The design of the supramolecular nanofibers allows for higher-order noncovalent ionic cross-linking of the nanofibers into a viscoelastic network. We determine the stiffness of the self-assembled nanofibers via the peak force quantitative nanomechanical atomic force microscopy and the bulk-scale rheometry. The storage moduli depend on peptide concentration, ionic strength, and concentration of multivalent ionic cross-linker. CASP nanofibers are demonstrated to be effective against Pseudomonas aeruginosa colonies. We use nanomechanical analysis and microsecond-time scale coarse-grained simulation to elucidate the interaction between the peptides and bacterial membranes. We demonstrate that the membranes stiffen, contract, and buckle after binding to peptide nanofibers, allowing disruption of osmotic equilibrium between the intracellular and extracellular matrix. This is further associated with dramatic changes in cell morphology. Our studies suggest that self-assembled peptide nanofibrils can potentially acts as membrane-disrupting antimicrobial agents, which can be formulated as injectable hydrogels with tunable material properties.

Original languageEnglish (US)
Pages (from-to)4657-4670
Number of pages14
JournalACS Biomaterials Science and Engineering
Volume5
Issue number9
DOIs
StatePublished - Sep 9 2019

Fingerprint

Hydrogels
Peptides
Nanofibers
Membranes
Materials properties
Ionic strength
Antimicrobial agents
Hydrogel
Biomimetics
Anti-Infective Agents
Charge density
Self assembly
Elasticity
Atomic force microscopy
Elastic moduli
Stiffness

All Science Journal Classification (ASJC) codes

  • Biomaterials
  • Biomedical Engineering

Keywords

  • antimicrobial peptides
  • hydrogel
  • membrane disruption
  • noncovalent cross-linking
  • peptide nanofibers
  • self-assembly

Cite this

Sarkar, B., Siddiqui, Z., Nguyen, P. K., Dube, N., Fu, W., Park, S., ... Kumar, V. A. (2019). Membrane-Disrupting Nanofibrous Peptide Hydrogels. ACS Biomaterials Science and Engineering, 5(9), 4657-4670. https://doi.org/10.1021/acsbiomaterials.9b00967
Sarkar, Biplab ; Siddiqui, Zain ; Nguyen, Peter K. ; Dube, Namita ; Fu, Wanyi ; Park, Steven ; Jaisinghani, Shivani ; Paul, Reshma ; Kozuch, Stephen D. ; Deng, Daiyong ; Iglesias-Montoro, Patricia ; Li, Mengyan ; Sabatino, David ; Perlin, David S. ; Zhang, Wen ; Mondal, Jagannath ; Kumar, Vivek A. / Membrane-Disrupting Nanofibrous Peptide Hydrogels. In: ACS Biomaterials Science and Engineering. 2019 ; Vol. 5, No. 9. pp. 4657-4670.
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Sarkar, B, Siddiqui, Z, Nguyen, PK, Dube, N, Fu, W, Park, S, Jaisinghani, S, Paul, R, Kozuch, SD, Deng, D, Iglesias-Montoro, P, Li, M, Sabatino, D, Perlin, DS, Zhang, W, Mondal, J & Kumar, VA 2019, 'Membrane-Disrupting Nanofibrous Peptide Hydrogels', ACS Biomaterials Science and Engineering, vol. 5, no. 9, pp. 4657-4670. https://doi.org/10.1021/acsbiomaterials.9b00967

Membrane-Disrupting Nanofibrous Peptide Hydrogels. / Sarkar, Biplab; Siddiqui, Zain; Nguyen, Peter K.; Dube, Namita; Fu, Wanyi; Park, Steven; Jaisinghani, Shivani; Paul, Reshma; Kozuch, Stephen D.; Deng, Daiyong; Iglesias-Montoro, Patricia; Li, Mengyan; Sabatino, David; Perlin, David S.; Zhang, Wen; Mondal, Jagannath; Kumar, Vivek A.

In: ACS Biomaterials Science and Engineering, Vol. 5, No. 9, 09.09.2019, p. 4657-4670.

Research output: Contribution to journalArticle

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AU - Siddiqui, Zain

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AU - Dube, Namita

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AU - Park, Steven

AU - Jaisinghani, Shivani

AU - Paul, Reshma

AU - Kozuch, Stephen D.

AU - Deng, Daiyong

AU - Iglesias-Montoro, Patricia

AU - Li, Mengyan

AU - Sabatino, David

AU - Perlin, David S.

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AU - Mondal, Jagannath

AU - Kumar, Vivek A.

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Sarkar B, Siddiqui Z, Nguyen PK, Dube N, Fu W, Park S et al. Membrane-Disrupting Nanofibrous Peptide Hydrogels. ACS Biomaterials Science and Engineering. 2019 Sep 9;5(9):4657-4670. https://doi.org/10.1021/acsbiomaterials.9b00967