title: Expression and distribution of neuropeptides in the nervous system of the crab Carcinus maenas and their roles in environmental stress.
abstract: Environmental fluctuations, such as salinity, impose serious challenges to marine animal survival. Neuropeptides, signaling molecules involved in the regulation process, and the dynamic changes of their full complement in the stress response have yet to be investigated. Here, a MALDI-MS-based stable isotope labeling quantitation strategy was used to investigate the relationship between neuropeptide expression and adaptability of Carcinus maenas to various salinity levels, including high (60 parts per thousand [p.p.t.]) and low (0 p.p.t.) salinity, in both the crustacean pericardial organ (PO) and brain. Moreover, a high salinity stress time course study was conducted. MS imaging (MSI) of neuropeptide localization in C. maenas PO was also performed. As a result of salinity stress, multiple neuropeptide families exhibited changes in their relative abundances, including RFamides (e.g. APQGNFLRFamide), RYamides (e.g. SSFRVGGSRYamide), B-type allatostatins (AST-B; e.g. VPNDWAHFRGSWamide), and orcokinins (e.g. NFDEIDRSSFGFV). The MSI data revealed distribution differences in several neuropeptides (e.g. SGFYANRYamide) between color morphs, but salinity stress appeared to not have a major effect on the localization of the neuropeptides.
authors.affiliation: School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA.
authors.forename: Yuzhuo
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison, Madison, WI, USA.
authors.forename: Amanda
authors.initials: A
authors.lastname: Buchberger
authors.affiliation: School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA.
authors.forename: Gajanthan
authors.initials: G
authors.lastname: Muthuvel
authors.affiliation: School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA.|Department of Chemistry, University of Wisconsin-Madison, Madison, WI, USA.
authors.forename: Lingjun
authors.initials: L
authors.lastname: Li
mesh_terms: D000818:Animals; D003386:Brachyura / Q000378:metabolism*; D007553:Isotope Labeling; D009420:Nervous System / Q000378:metabolism*; D009479:Neuropeptides / Q000378:metabolism*
chemical_list: D009479:Neuropeptides; C076523:allatostatin
keywords: Crustacean; Isotopic labeling; Mass spectrometry imaging; Neuropeptides; Salinity stress