@article {8985, title = {Three-dimensional structural evolution of the cuttlefish Sepia officinalis shell from embryo to adult stages}, journal = {Journal of the Royal Society Interface}, volume = {16}, year = {2019}, pages = {20190175}, doi = {10.1098/rsif.2019.0175}, url = {https://hal.archives-ouvertes.fr/hal-02318453}, author = {Le Pabic, Charles and Derr, Julien and Luquet, Gilles and Pascal Jean Lopez and Laure Bonnaud-Ponticelli} } @article {6665, title = {Digestive enzyme ratios are good indicators of hatchling yolk reserve and digestive gland maturation in early life stages of cuttlefish Sepia officinalis L.: application of these new tools in ecology and aquaculture}, journal = {Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology}, volume = {188}, year = {2018}, pages = {57-76}, abstract = {In Sepia officinalis (Linnaeus, 1758), the digestive gland matures during the first month post-hatching, while a shift from intracellular acid to extracellular alkaline digestion occurs. The purpose of this study was to investigate the possibility of using enzymatic ratios for the description of digestive system maturation in early life stages of S. officinalis. Second, it is intended to apply these new tools as eco-physiological indicators for understanding the impact of cuttlefish eggs{\textquoteright} life history from different spawning sites of the English Channel on digestive performance of juveniles. An experimental rearing was performed over 35\ days after hatching (DAH) on juveniles from wild collected eggs in 2010 and 2011. Four digestive enzyme activities and their ratios [i.e., trypsin, cathepsin, acid (ACP), and alkaline (ALP) phosphatase, ALP/ACP, and trypsin/cathepsin] were studied along with histological features (e.g., internal yolk surface and digestive gland development). The two enzyme ratios were good indicators of digestive system maturation allowing the study of the digestive gland{\textquoteright}s development. They were highly correlated to juveniles{\textquoteright} weight increase and histological features of the gland in early DAH. These ratios described more accurately the shift occurring between the intracellular acid and the extracellular alkaline modes of digestion in S. officinalis and were more specific than separated enzyme activities. Their application as eco-physiological tools revealed that enzyme ratios reflected yolk content and digestive gland development in new hatching juveniles. Finally, ALP/ACP ratio was shown to be a powerful tool to describe growth performance of S. officinalis which is useful for aquaculture optimization. {\textcopyright} 2017, Springer-Verlag GmbH Germany.}, keywords = {Acid Phosphatase, alkaline phosphatase, anatomy and histology, animal, Animals, Aquaculture, cathepsin, Cathepsins, cuttlefish, Gastrointestinal Tract, Physiology, Sepia, Trypsin}, issn = {01741578}, doi = {10.1007/s00360-017-1115-4}, url = {https://link.springer.com/article/10.1007\%2Fs00360-017-1115-4}, author = {Safi, Georges and Anne-Sophie Martinez and Le Pabic, Charles and Le Bihan, E and Jean-Paul Robin and Koueta, Noussith{\'e}} } @article {4526, title = {First proteomic analyses of the dorsal and ventral parts of the Sepia officinalis cuttlebone.}, journal = {J Proteomics}, volume = {150}, year = {2017}, month = {2016 Aug 26}, pages = {63-73}, abstract = {

Protein compounds constituting mollusk shells are known for their major roles in the biomineralization processes. These last years, a great diversity of shell proteins have been described in bivalves and gastropods allowing a better understanding of the calcification control by organic compounds and given promising applications in biotechnology. Here, we analyzed for the first time the organic matrix of the aragonitic Sepia officinalis shell, with an emphasis on protein composition of two different structures: the dorsal shield and the chambered part. Our results highlight an organic matrix mainly composed of polysaccharide, glycoprotein and protein compounds as previously described in other mollusk shells, with quantitative and qualitative differences between the dorsal shield and the chamber part. Proteomic analysis resulted in identification of only a few protein compounds underlining the lack of reference databases for Sepiidae. However, most of them contain domains previously characterized in matrix proteins of aragonitic shell-builder mollusks, suggesting ancient and conserved mechanisms of the aragonite biomineralization processes within mollusks.

BIOLOGICAL SIGNIFICANCE: The cuttlefish{\textquoteright}s inner shell, better known under the name "cuttlebone", is a complex mineral structure unique in mollusks and involved in tissue support and buoyancy regulation. Although it combines useful properties as high compressive strength, high porosity and high permeability, knowledge about organic compounds involved in its building remains limited. Moreover, several cuttlebone organic matrix studies reported data very different from each other or from other mollusk shells. Thus, this study provides 1) an overview of the organization of the main mineral structures found in the S. officinalis shell, 2) a reliable baseline about its organic composition, and 3) a first descriptive proteomic approach of organic matrices found in the two main parts of this shell. These data will contribute to the general knowledge about mollusk biomineralization as well as in the identification of protein compounds involved in the Sepiidae shell calcification.

}, issn = {1876-7737}, doi = {10.1016/j.jprot.2016.08.015}, author = {Le Pabic, Charles and Marie, Arul and Marie, Benjamin and Percot, Aline and Laure Bonnaud-Ponticelli and Pascal Jean Lopez and Gilles Luquet} }