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 2 publications

(2 citation statements)

References 42 publications

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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%

Section: Discussionmentioning

confidence: 99%

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

Duminis,

Heljak,

Święszkowski

et al. 2023

Marine Drugs

View full text Add to dashboard Cite

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Mechanical network equivalence between the katydid and mammalian inner ears

Celiker,

Woodrow,

Guadayol

et al. 2024

PLoS Comput Biol

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Mammalian hearing operates on three basic steps: 1) sound capturing, 2) impedance conversion, and 3) frequency analysis. While these canonical steps are vital for acoustic communication and survival in mammals, they are not unique to them. An equivalent mechanism has been described for katydids (Insecta), and it is unique to this group among invertebrates. The katydid inner ear resembles an uncoiled cochlea, and has a length less than 1 mm. Their inner ears contain a hearing organ, crista acustica, which holds tonotopically arranged sensory cells for frequency mapping via travelling waves. The crista acustica is located on a curved triangular surface formed by the dorsal wall of the ear canal. While empirical recordings show tonotopic vibrations in the katydid inner ear for frequency analysis, the biophysical mechanism leading to tonotopy remains elusive due to the small size and complexity of the hearing organ. In this study, robust numerical simulations are developed for an in silico investigation of this process. Simulations are based on the precise katydid inner ear geometry obtained by synchrotron-based micro-computed tomography, and empirically determined inner ear fluid properties for an accurate representation of the underlying mechanism. We demonstrate that the triangular structure below the hearing organ drives the tonotopy and travelling waves in the inner ear, and thus has an equivalent role to the mammalian basilar membrane. This reveals a stronger analogy between the inner ear basic mechanical networks of two organisms with ancient evolutionary differences and independent phylogenetic histories.

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

Cited by 2 publications

References 42 publications

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

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

Mechanical network equivalence between the katydid and mammalian inner ears

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