title: Expression of polysialyltransferases (STX and PST) in adult rat olfactory bulb after an olfactory associative discrimination task.
abstract: Neuronal plasticity and neurogenesis occur in the adult hippocampus and in other brain structures such as the olfactory bulb and often involve the neural cell adhesion molecule NCAM. During an olfactory associative discrimination learning task, NCAM polysialylation triggers neuronal plasticity in the adult hippocampus. The PST enzyme likely modulates this polysialylation, but not STX, a second sialyltransferase. How the two polysialyltransferases are involved in the adult olfactory bulb remains unknown. We addressed this question by investigating the effect of olfactory associative learning on plasticity and neurogenesis. After a hippocampo-dependent olfactory associative task learning, we measured the expression of both PST and STX polysialyltransferases in the olfactory bulbs of adult rats using quantitative PCR. In parallel, immunohistochemistry was used to evaluate both NCAM polysialylation level and newly-born cells, with or without learning. After learning, no changes were observed neither in the expression level of PST and NCAM polysialylation, nor in STX gene expression level and newly-born cells number in the olfactory bulb.
authors: Aix Marseille Université, CNRS, NICN, UMR 7259, 13344 Marseille, France.
authors: J
authors: J
authors: Mione
authors: Aix Marseille Université, CNRS, FR 3512, 13331 Marseille, France.
authors: C
authors: C
authors: Manrique
authors: Aix Marseille Université, CNRS, NICN, UMR 7259, 13344 Marseille, France.
authors: Y
authors: Y
authors: Duhoo
authors: Aix Marseille Université, CNRS, NICN, UMR 7259, 13344 Marseille, France.
authors: F S
authors: FS
authors: Roman
authors: Aix Marseille Université, CNRS, NICN, UMR 7259, 13344 Marseille, France. Electronic address: gaelle.guiraudie@univ-amu.fr.
authors: G
authors: G
authors: Guiraudie-Capraz
mesh_terms: D000818:Animals; D001245:Association Learning / Q000502:physiology*; D004192:Discrimination, Psychological / Q000502:physiology*; D019006:Neural Cell Adhesion Molecules / Q000378:metabolism; D055495:Neurogenesis / Q000502:physiology; D009473:Neuronal Plasticity / Q000502:physiology; D009812:Odorants; D009830:Olfactory Bulb / Q000378:metabolism*; D055696:Olfactory Perception / Q000502:physiology*; D051381:Rats; D012799:Sialyltransferases / Q000378:metabolism*; D012903:Smell / Q000502:physiology*
chemical_list: D019006:Neural Cell Adhesion Molecules; D012799:Sialyltransferases
keywords: Learning and memory; Neural cell adhesion molecule; Neurogenesis; Neuronal plasticity; Polysialic acid; Polysialyltransferases