title: Both heat shock and water deprivation trigger Hsp70 expression in the olfactory lobe of the crab Chasmagnathus granulatus.
abstract: Heat-shock proteins (Hsp) are synthesized in the central nervous system in response to traumas but also after physical exercise and psychophysiological stress. Therefore, an increase in Hsp expression is a good marker of changes in metabolic activity. In the crab Chasmagnathus, a powerful memory paradigm has been established. Memory modulation is possible by water shortage. The brain areas activated by either training protocols and/or water-deprivation are still unknown. Hsp expression might be a marker to sensing the increase in metabolic activity in crab Chasmagnathus brain neuropils engaged in the physiological responses triggered by water deprivation and cognitive processing. Here, we observed an increase in brain Hsp of 70kDa (Hsp70) expression after a heat-shock treatment. Additionally, immunohistochemistry analysis revealed that, under basal conditions, some glomeruli of the olfactory lobes showed Hsp70 immunoreactivity in an on-off manner. Both a hot environment and water deprivation increased the number of glomeruli expressing Hsp70. This marker of neuropil's activity might turn out to be a powerful tool to test whether crustacean olfactory lobes not only process olfactory information but also integrate multimodal signals.
authors.affiliation: Departamento de Fisiología y Biología Molecular y Celular, Universidad de Buenos Aires, C1428EHA Ciudad de Buenos Aires, Argentina.
authors.forename: Lia
authors.initials: L
authors.lastname: Frenkel
authors.forename: Beatriz
authors.initials: B
authors.lastname: Dimant
authors.forename: Enrique L
authors.initials: EL
authors.lastname: Portiansky
authors.forename: Héctor
authors.initials: H
authors.lastname: Maldonado
authors.forename: Alejandro
authors.initials: A
authors.lastname: Delorenzi
mesh_terms: D000818:Animals; D003386:Brachyura / Q000033:anatomy & histology / Q000502:physiology*; D005786:Gene Expression Regulation / Q000502:physiology*; D018840:HSP70 Heat-Shock Proteins / Q000378:metabolism*; D006358:Hot Temperature; D009830:Olfactory Bulb / Q000378:metabolism*; D013696:Temperature; D014868:Water Deprivation
chemical_list: D018840:HSP70 Heat-Shock Proteins