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Elementary calcium release events in the skeletal muscle cells of the honey bee Apis mellifera

Abstract : Abstract enzymatically from the adult honey bee legs allowed the first spatio-temporal characterization of subcellular calcium release events (CREs) in an insect species. The frequency of CREs, measured in x–y time lapse series, was higher than frequencies usually described in vertebrates. Honey bee CREs had a larger spatial spread at half maximum than their vertebrate counterparts and a slightly ellipsoidal shape, two characteristics that may be related to ultrastructural features specific to invertebrate cells. In line-scan experiments, the histogram of CREs’ duration followed a bimodal distribution, supporting the existence of both sparks and embers. Unlike in vertebrates, embers and sparks had similar amplitudes, a difference that could be related to genomic differences and/or excitation–contraction coupling specificities in honey bee skeletal muscle fibres. The first characterization of CREs from an arthropod which shows strong genomic, ultrastructural and physiological differences with vertebrates may help in improving the research field of sparkology and more generally the knowledge in invertebrates cell Ca 2+ homeostasis, eventually leading to a better understanding of their roles and regulations in muscles but also the myotoxicity of new insecticides targeting ryanodine receptors.
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Contributor : Claude COLLET Connect in order to contact the contributor
Submitted on : Friday, September 3, 2021 - 5:46:08 PM
Last modification on : Monday, February 28, 2022 - 5:22:48 PM


Distributed under a Creative Commons Attribution 4.0 International License

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Claude Collet, Mercédès Charreton, Laszlo Szabo, Marianna Takacs, Laszlo Csernoch, et al.. Elementary calcium release events in the skeletal muscle cells of the honey bee Apis mellifera. Scientific Reports, Nature Publishing Group, 2021, 11 (1), ⟨10.1038/s41598-021-96028-w⟩. ⟨hal-03334447⟩



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