Quantification of bush-cricket acoustic trachea mechanics using Atomic Force Microscopy nanoindentation

Siamantouras, Eleftherios; Woodrow, Charlie; Celiker, Emine; Cullen, Darron A.; Hills, Claire E.; Squires, Paul E.; Montealegre‐Z, Fernando

doi:10.1016/j.actbio.2022.08.056

Cited by 1 publication

(2 citation statements)

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“…It has been recently found that proteins also play a role in the elastic properties of protein-chitin composites in the squid species of Loligo vulgaris and upon whole protein removal results in reduced elasticity [60]. This is also similar in the case of bush cricket Mecopoda elongate where dityrosine compounds cross-link protein resilin that results in significantly improved elasticity of the single taenidia fibres comprising the acoustic trachea, which the authors attributed to "structural optimization between compliance and rigidity" [29].…”

Section: Discussionmentioning

confidence: 89%

“…This further confirms the unique nature and superior mechanical properties of the chitinous Verongiida demosponges under study. For example, the elastic modulus (nanoindentation) of the A. aerophoba demosponge skeleton, still containing bromotyrosines, is approximately 2.6 GPa ( Figure 5 ), which is half of the bush crickets’ Mecopoda elongata acoustic tracheae (5.2 GPa) [ 29 ] and scorpion ( Scorpio palmatus ) tarsus exoskeleton (5.4 GPa) [ 49 ]. However, this value falls within the range of, for example, chitin films [ 28 , 52 , 53 ] but below, for example, crustacean nanofibres isolated from the American lobster ( Homarus americanus) (Young’s modulus: 7.3 GPa) [ 54 ].…”

Section: Discussionmentioning

confidence: 99%

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On the Mechanical Properties of Microfibre-Based 3D Chitinous Scaffolds from Selected Verongiida Sponges

Duminis,

Heljak,

Święszkowski

et al. 2023

Marine Drugs

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Skeletal constructs of diverse marine sponges remain to be a sustainable source of biocompatible porous biopolymer-based 3D scaffolds for tissue engineering and technology, especially structures isolated from cultivated demosponges, which belong to the Verongiida order, due to the renewability of their chitinous, fibre-containing architecture focused attention. These chitinous scaffolds have already shown excellent and promising results in biomimetics and tissue engineering with respect to their broad diversity of cells. However, the mechanical features of these constructs have been poorly studied before. For the first time, the elastic moduli characterising the chitinous samples have been determined. Moreover, nanoindentation of the selected bromotyrosine-containing as well as pigment-free chitinous scaffolds isolated from selected verongiids was used in the study for comparative purposes. It was shown that the removal of bromotyrosines from chitin scaffolds results in a reduced elastic modulus; however, their hardness was relatively unaffected.

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Section: Discussionmentioning

confidence: 89%