RGD Reference Report - Time course of c-fos, vasopressin and oxytocin mRNA expression in the hypothalamus following long-term dehydration. - Rat Genome Database

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Time course of c-fos, vasopressin and oxytocin mRNA expression in the hypothalamus following long-term dehydration.

Authors: Da Silveira, LT  Junta, CM  Monesi, N  De Oliveira-Pelegrin, GR  Passos, GA  Rocha, MJ 
Citation: da Silveira LT, etal., Cell Mol Neurobiol. 2007 Aug;27(5):575-84.
RGD ID: 2304139
Pubmed: PMID:17393298   (View Abstract at PubMed)
DOI: DOI:10.1007/s10571-007-9144-2   (Journal Full-text)

1. This study presents a time course analysis of the messenger RNA (mRNA) levels of c-fos, vasopressin (VP), and oxytocin (OT) in the paraventricular (PVN) and supraoptic nucleus (SON), following acute and chronic dehydration by water deprivation. 2. Male Wistar rats were separated into five groups: nondehydrated (control group) and dehydrated for 6, 24, 48 and 72 h. Following water deprivation, animals were decapitated, their blood was collected for hematocrit, osmolality, and plasma sodium measurements, and brains were removed for dissection of both PVN and SON. 3. As expected, the hematocrit, osmolality, plasma sodium, and weight loss were increased after water deprivation. In SON, a significant increase in both VP and OT mRNA expression was observed 6 h after dehydration reaching a peak at 24 h and returning to basal levels of expression at 72 h. In the PVN, an increase in both VP and OTmRNA expression occurred 24 h after dehydration. At 72 h the VP and OT mRNA expression levels had decreased but they were still at higher levels than those detected in control animals. 4. These results suggest that SON is the first nucleus to respond to the dehydration stimulus. Additionally, we also observed an increase in c-fos mRNA expression in both PVN and SON 6 h after water deprivation, which progressively decreased 24, 48, and 72 h after the onset of water deprivation. Therefore, it is possible that c-fos may be involved in the modulation of VP and OT genes, regulating the mRNA expression levels on a temporally distinct basis within the PVN and SON.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
Dehydration  ISOAvp (Rattus norvegicus)2304139; 2304139mRNA:increased expression:paraventricular hypothalamic nucleus and supraoptic nucleusRGD 
Dehydration  IEP 2304139; 2304139mRNA:increased expression:paraventricular hypothalamic nucleus and supraoptic nucleusRGD 
Dehydration  ISOOxt (Rattus norvegicus)2304139; 2304139mRNA:increased expression:paraventricular hypothalamic nucleus and supraoptic nucleusRGD 

Objects Annotated

Genes (Rattus norvegicus)
Avp  (arginine vasopressin)
Oxt  (oxytocin/neurophysin I prepropeptide)

Genes (Mus musculus)
Avp  (arginine vasopressin)
Oxt  (oxytocin)

Genes (Homo sapiens)
AVP  (arginine vasopressin)
OXT  (oxytocin/neurophysin I prepropeptide)


Additional Information