@article {9514,
	title = {Structural and functional characterization of an egg-laying hormone signaling system in a lophotrochozoan - The pacific oyster (Crassostrea gigas).},
	journal = {Gen Comp Endocrinol},
	volume = {346},
	year = {2023},
	month = {2023 Nov 28},
	pages = {114417},
	abstract = {<p>The egg-laying hormones (ELHs) of gastropod mollusks were characterized more than forty years ago. Yet, they have remained little explored in other mollusks. To gain insights into the functionality of the ELH signaling system in a bivalve mollusk - the oyster Crassostrea gigas, this study investigates the processing of its ELH precursor (Cragi-ELH) by mass spectrometry. Some of the ELH mature peptides identified in this study were subsequently investigated by nuclear magnetic resonance and shown to adopt an extended alpha-helix structure in a micellar medium mimicking the plasma membrane. To further characterize the ELH signaling system in C. gigas, a G protein-coupled receptor phylogenetically related to ecdysozoan diuretic hormone DH44 and corticotropin-releasing hormone (CRH) receptors named Cragi-ELHR was also characterized functionally and shown to be specifically activated by the two predicted mature ELH peptides and their N-terminal fragments. Both Cragi-ELH and Cragi-ELHR encoding genes were mostly expressed in the visceral ganglia (VG). Cragi-ELH expression was significantly increased in the VG of both fully mature male and female oysters at the spawning stage. When the oysters were submitted to a nutritional or hyposaline stress, no change in the expression of the ligand or receptor genes was recorded, except for Cragi-ELHR only during a mild acclimation episode to brackish water. These results suggest a role of Cragi-ELH signaling in the regulation of reproduction but not in mediating the stress response in our experimental conditions.</p>
},
	issn = {1095-6840},
	doi = {10.1016/j.ygcen.2023.114417},
	author = {Favrel, P and Dubos, M P and Bernay, B and Pasquier, J and Schwartz, J and Lefranc, B and Mouret, L and Rivi{\`e}re, G and Leprince, J and Bondon, A}
}
@article {5238,
	title = {Differential protein expression during sperm maturation and capacitation in an hermaphroditic bivalve, Pecten maximus (Linnaeus, 1758)},
	journal = {J. of Molluscan Studies},
	volume = {82},
	year = {2016},
	month = {11/2016},
	pages = {575-584},
	type = {research},
	abstract = {<p>In order to investigate the mechanisms of final maturation and capacitation of spermatozoa in Pecten maximus, we used a 2D proteomic approach coupled with MALDI-TOF/TOF mass spectrometry (MS) and bioinformatics search against the Pecten database, to set up a reference map of the proteome of spawned spermatozoa, and identified 133 proteins on the basis of the EST database. These proteins are mainly involved in energy production, ion and electron transport (44\%), cell movement (22\%) and developmental processes (10\%). Comparison between proteomes of spermatozoa collected before and after transit through the genital ducts of P. maximus led to the identification of differentially expressed proteins. Most of them are associated with energy metabolism (aconitate hydratase, malate dehydrogenase, glyceraldehyde-3-phosphate dehydrogenase), indicating important modifications of energy production during transit in gonoducts, potentially linked with acquisition of sperm motility. Three proteins involved in cell movement (Tektin-2, tubulin and microtubule-associated protein RP/EB family member 3) were down-regulated in spermatozoa stripped from the gonad. 40S ribosomal protein SA, involved in maturation of 40S ribosomal subunits, was also found to be down-regulated in spermatozoa obtained by induced spawning, suggesting reduction of the effi- ciency of RNA translation, a characteristic of late spermatozoon differentiation. These results confirm that maturation processes of P. maximus spermatozoa during transit through the gonoduct involve RNA translation, energy metabolism and structural proteins implicated in cell movement. Spermatozoa maturation processes clearly differ between P. maximus and gonochoric or alternately hermaphroditic bivalves, potentially in relation to reproductive strategies: the final maturation of the spermatozoon along the genital tract probably contributes to reduction of autofertilization in this simultaneously hermaphroditic species</p>
},
	doi = {doi:10.1093/mollus/eyw028},
	author = {Boonmee, A and Clothilde Berthelin and Kingtong, S and Pauletto, M and Bernay, B and Suquet, M and Pascal Sourdaine and Kellner K}
}
@article {4530,
	title = {Differential protein expression during sperm maturation and capacitation in an hermaphroditic bivalve, Pecten maximus (Linnaeus, 1758)},
	journal = {Journal of Molluscan Studies},
	year = {2016},
	month = {09/2016},
	pages = {1-10},
	author = {Boonmee, A and Clothilde Heude-Berthelin and Kingtong, S and Pauletto, M and Bernay, B and Adeline, B and Suquet, M and Pascal Sourdaine and Kristell Kellner-Cousin}
}
