@article {4491, title = {Nervous system development in cephalopods: How egg yolk-richness modifies the topology of the mediolateral patterning system.}, journal = {Dev Biol}, volume = {415}, year = {2016}, month = {2016 Jul 1}, pages = {143-56}, abstract = {

Cephalopods possess the most complex centralized nervous system among molluscs and the molecular determinants of its development have only begun to be explored. To better understand how evolved their brain and body axes, we studied Sepia officinalis embryos and investigated the expression patterns of neural regionalization genes involved in the mediolateral patterning of the neuroectoderm in model species. SoxB1 expression reveals that the embryonic neuroectoderm is made of several distinct territories that constitute a large part of the animal pole disc. Concentric nkx2.1, pax6/gsx, and pax3/7/msx/pax2/5/8 positive domains subdivide this neuroectoderm. Looking from dorsal to ventral sides, the sequence of these expressions is reminiscent of the mediolateral subdivision in model species, which provides good evidence for "mediolateral patterning" conservation in cephalopods. A specific feature of cephalopod development, however, includes an unconventional orientation to this mediolateral sequence: median markers (like nkx2.1) are unexpectedly expressed at the periphery of the cuttlefish embryo and lateral markers (like Pax3/7) are expressed centrally. As the egg is rich with yolk, the lips of the blastopore (that classically organizes the neural midline) remain unclosed at the lateral side of the animal pole until late stages of organogenesis, therefore reversing the whole embryo topology. These findings confirm - by means of molecular tools - the location of both ventral and dorsal poles in cephalopod embryos.

}, issn = {1095-564X}, doi = {10.1016/j.ydbio.2016.04.027}, author = {Buresi, Auxane and Aude Andouche and Navet, S and Yann Bassaglia and Laure Bonnaud-Ponticelli and S{\'e}bastien Baratte} } @article {3390, title = {Could FaRP-Like Peptides Participate in Regulation of Hyperosmotic Stress Responses in Plants?}, journal = {Front Endocrinol (Lausanne)}, volume = {5}, year = {2014}, month = {2014}, pages = {132}, abstract = {

The ability to respond to hyperosmotic stress is one of the numerous conserved cellular processes that most of the organisms have to face during their life. In metazoans, some peptides belonging to the FMRFamide-like peptide (FLP) family were shown to participate in osmoregulation via regulation of ion channels; this is, a well-known response to hyperosmotic stress in plants. Thus, we explored whether FLPs exist and regulate osmotic stress in plants. First, we demonstrated the response of Arabidopsis thaliana cultured cells to a metazoan FLP (FLRF). We found that A. thaliana express genes that display typical FLP repeated sequences, which end in RF and are surrounded by K or R, which is typical of cleavage sites and suggests bioactivity; however, the terminal G, allowing an amidation process in metazoan, seems to be replaced by W. Using synthetic peptides, we showed that amidation appears unnecessary to bioactivity in A. thaliana, and we provide evidence that these putative FLPs could be involved in physiological processes related to hyperosmotic stress responses in plants, urging further studies on this topic.

}, issn = {1664-2392}, doi = {10.3389/fendo.2014.00132}, author = {Bouteau, Francois and Yann Bassaglia and Monetti, Emanuela and Tran, Daniel and Navet, S and Mancuso, Stefano and El-Maarouf-Bouteau, Hayat and Laure Bonnaud-Ponticelli} } @article {3392, title = {NEUROGENESIS IN CEPHALOPODS: {\textquotedblleft}ECO-EVO-DEVO{\textquotedblright} APPROACH IN THE CUTTLEFISH SEPIA OFFICINALIS (MOLLUSCA-CEPHALOPODA)}, journal = {Journal of Marine Science and Technology, Taiwan}, volume = {22}, year = {2014}, pages = {15-24}, abstract = {

Cephalopods are new evolutionary and ecological models.
By their phylogenetic position (Lophotrochozoa, Mollusca),
they provide a missing master piece in the whole puzzle of
neurodevelopment studies. Their derived and specific nervous
system but also their convergence with vertebrates offer
abundant materials to question the evolution and development
of the nervous system of Metazoa (evo-devo studies). In
addition, their various adaptions to different modes of life
open new fields of investigation of developmental plasticity
according to ecological context (eco-evo-devo approach). In
this paper, we review the recent works on cephalopod nervous
developmental investigations. We show how cephalopods, and
especially Sepia officinalis, an animal of economical interest,
can be used as suitable models to extend our knowledge on
cephalopod ecology and on nervous system evolution among
molluscs.

}, author = {Navet, S and S{\'e}bastien Baratte and Yann Bassaglia and Aude Andouche and Buresi, Auxane and Laure Bonnaud-Ponticelli} }