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Communication Dans Un Congrès Année : 2023

Senescence in crustaceans: a new insight from the spiny lobster Palinurus elephas

Résumé

Senescence in crustaceans: a new insight from the spiny lobster Palinurus elephas Age estimation is a major challenge in crustaceans. Unless other species, the loss of hard structures during periodic moult prevents a direct and accurate estimation of aging. Some metabolic biomarkers are used to estimate the physiological age of several crustaceans and lead to interesting results. Among them, a relation between growth and lipofuscin accumulation in lobster cerebral ganglions was shown (REF?). Aging leads to protein modifications especially protein oxidations. Their accumulations during aging are well described for mammalian models. In this project, we have investigated aging biomarkers of an iconic spiny lobster species of the Northeast Atlantic and the Mediterranean Sea, also representing an important economic marine resource: Palinurus elephas. Several markers were analysed as: i. aging biomarkers as lipofuscin accumulation in the olfactive gland, ii. lipid peroxidation adducts, iii. protein carbonyl groups in the hepatopancreas. Results from about a hundred of spiny lobsters fished around Corsica with a large range of cephalothorax length (from 52.52 mm up to 186.7 mm, which is one of the maximum size reported for this species) are discussed with individual’s size and predicted age from growth prediction. We confirmed the potential of lipofuscin assays for a broad range of specimen sizes as shown in the litterature for other decapodes. On the other hand biomarkers as HNE, were particularly low in biggest individuals while small and intermediate sizes showed high variability, suggesting some individual’s capacity for cellular defence mechanisms against oxidative damage. This study could pave the way for a new method combined with an accurate evaluation of the growth of the spiny lobster P.elephas. For the first time, it was shown that protein modifications can be used as biomarkers of crustacean aging.
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Dates et versions

hal-04427439 , version 1 (30-01-2024)

Identifiants

  • HAL Id : hal-04427439 , version 1

Citer

Dimitri Theuerkauff, Rémy Agniel, Claire Varlet, Nine Doutreloux, Michel Marengo, et al.. Senescence in crustaceans: a new insight from the spiny lobster Palinurus elephas. SICB 2023 : Society of Integrative and Comparative Biology, SICB, Jan 2023, Austin (Texas, USA), United States. ⟨hal-04427439⟩
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