« Previous AbstractConsumption of gossypol increases fatty acid-amino acid conjugates in the cotton pests Helicoverpa armigera and Heliothis virescens    Next AbstractAcetate provokes mitochondrial stress and cell death in Ustilago maydis »

J Chem Neuroanat

Title:		Correlated basal expression of immediate early gene egr1 and tyrosine hydroxylase in zebrafish brain and downregulation in olfactory bulb after transitory olfactory deprivation
Author(s):		Kress S; Wullimann MF;
Address:		"Ludwig-Maximilians-Universitat Munich, Biocenter, Graduate School of Systemic Neurosciences, Department Biologie II, Planegg-Martinsried, Germany"
Journal Title:		J Chem Neuroanat
Year:		2012
Volume:		20120927
Issue:		1-Feb
Page Number:		51 - 66
DOI:		10.1016/j.jchemneu.2012.09.002
ISSN/ISBN:		1873-6300 (Electronic) 0891-0618 (Linking)
Abstract:		"Imprinting on kin occurs during the sixth day of larval development in zebrafish and depends on olfactory signals. In rodents, the immediate early gene egr1 is involved in maintaining the dopaminergic phenotype of periglomerular olfactory bulb cells in an activity dependent way. Furthermore, egr1 is upregulated in medial amygdalar dopamine cells in some rodents (prairie voles) dependent on social pheromone interactions. Thus, we aimed to investigate whether egr1 is involved in imprinting processes and later kin recognition in zebrafish in olfactory centers, such as the olfactory bulb and suspected medial amygdala. In the present paper, we focus on a basic investigation of basal egr1 expression throughout zebrafish brain development and its co-localization with tyrosine hydroxylase as a marker for dopaminergic neurons. Indeed, there is unambiguous co-localization of egr1 and tyrosine hydroxylase in the zebrafish olfactory bulb and hypothetical medial amygdala. Furthermore, as in rodents, ipsilateral transient olfactory deprivation through Triton X-100 treatment of the olfactory epithelium leads to downregulation of egr1 and tyrosine hydroxylase expression in the olfactory bulb, but apparently not in secondary olfactory targets of the zebrafish brain. This indicates that similar processes might be at work in zebrafish and rodent olfactory systems, but their more specific involvement in imprinting in zebrafish has to be further tested"
Keywords:		"Animals Brain/enzymology/growth & development/*metabolism Down-Regulation/*genetics Early Growth Response Protein 1/*biosynthesis/*genetics/metabolism *Genes, Immediate-Early Olfactory Bulb/growth & development/*metabolism Sensory Deprivation/*physiology;neuroscience;"
Notes:		"MedlineKress, Sigrid Wullimann, Mario F eng Research Support, Non-U.S. Gov't Netherlands 2012/10/02 J Chem Neuroanat. 2012 Dec; 46(1-2):51-66. doi: 10.1016/j.jchemneu.2012.09.002. Epub 2012 Sep 27"