title: Expression and modulation of neuroligin and neurexin in the olfactory organ of the cotton leaf worm Spodoptera littoralis.
abstract: Carboxylesterases are enzymes widely distributed within living organisms. In insects, they have been mainly involved in dietary metabolism and detoxification function. Interestingly, several members of this family called carboxylesterase-like adhesion molecules (CLAMs) have lost their catalytic properties and are mainly involved in neuro/developmental functions. CLAMs include gliotactins, neurotactins, glutactins, and neuroligins. The latter have for binding partner the neurexin. In insects, the function of these proteins has been mainly studied in Drosophila central nervous system or neuromuscular junction. Some studies suggested a role of neuroligins and neurexin in sensory processing but CLAM expression within sensory systems has not been investigated. Here, we reported the identification of 5 putative CLAMs expressed in the olfactory system of the model pest insect Spodoptera littoralis. One neuroligin, Slnlg4-yll and its putative binding partner neurexin SlnrxI were the most expressed in the antennae and were surprisingly associated with olfactory sensilla. In addition, both transcripts were upregulated in male antennae after mating, known to modulate the sensitivity of the peripheral olfactory system in S. littoralis, suggesting that these molecules could be involved in sensory plasticity.
authors.affiliation: Sorbonne Universités UPMC - Univ Paris 06, Institut d'Ecologie et des Sciences de 'Environnement de Paris, INRA, CNRS, IRD, UPEC, Département d'Ecologie Sensorielle, F-75252, Paris, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Durand
authors.affiliation: Sorbonne Universités UPMC - Univ Paris 06, Institut d'Ecologie et des Sciences de 'Environnement de Paris, INRA, CNRS, IRD, UPEC, Département d'Ecologie Sensorielle, F-75252, Paris, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Chertemps
authors.affiliation: Sorbonne Universités UPMC - Univ Paris 06, Institut d'Ecologie et des Sciences de 'Environnement de Paris, INRA, CNRS, IRD, UPEC, Département d'Ecologie Sensorielle, F-75252, Paris, France.
authors.forename: Françoise
authors.initials: F
authors.lastname: Bozzolan
authors.affiliation: Sorbonne Universités UPMC - Univ Paris 06, Institut d'Ecologie et des Sciences de 'Environnement de Paris, INRA, CNRS, IRD, UPEC, Département d'Ecologie Sensorielle, F-75252, Paris, France.
authors.forename: Martine
authors.initials: M
authors.lastname: Maïbèche
mesh_terms: D000818:Animals; D057506:Arthropod Antennae / Q000378:metabolism; D015816:Cell Adhesion Molecules, Neuronal / Q000235:genetics / Q000378:metabolism; D005260:Female; D019476:Insect Proteins / Q000235:genetics / Q000378:metabolism; D008297:Male; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism; D009928:Organ Specificity; D010802:Phylogeny; D012098:Reproduction / Q000502:physiology; D058618:Sensilla / Q000378:metabolism*; D017422:Sequence Analysis, DNA; D018411:Spodoptera / Q000235:genetics / Q000378:metabolism*
chemical_list: D015816:Cell Adhesion Molecules, Neuronal; D019476:Insect Proteins; D009419:Nerve Tissue Proteins
keywords: carboxylesterase-like adhesion molecules; insect; neurexin; neuroligins; olfaction