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Inner ear pressure changes modify adh secretion in freely moving guinea pig

Podda, Maria Vittoria and Ivali, Riccardo and Faedda, Rossana and Cosellu, Sebastiana and Deriu, Franca and Tolu, Eusebio and Montella, Andrea Costantino Mario and Satta, Andrea Ercole (1999) Inner ear pressure changes modify adh secretion in freely moving guinea pig. Journal of Nephrology, Vol. 12 (1), p. 47-50. eISSN 1724-6059. Article.

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Abstract

The present study was designed to elucidate the relationship between endolymphatic pressure and plasma ADH levels in conscious guinea pigs. Plasma ADH (pADH) was measured in basal conditions and after having applied positive or negative pressure of 20 cmH2O to the inner ear. The experimental protocol was designed to avoid any interference on ADH release caused by anesthesia and surgical stress. There was no change in blood pressure, heart rate, plasma Na (pNa) and osmolality (pOsm) after inner ear pressure (IEP) modifications. However, pADH was inversely related with IEP: pADH averaged 31.4 ± 7.0 pg/ml (mean ± S.D.) in basal conditions, rising to 48.8 ± 19.3 when IEP was lowered and falling to 16.6 ± 10.3 when IEP was raised. These results confirm that structures in the inner ear help control of ADH release.

Item Type:Article
ID Code:532
Status:Published
Refereed:Yes
Uncontrolled Keywords:ADH, labyrinth, inner ear pressure, endolymph, guinea pig
Subjects:Area 06 - Scienze mediche > MED/14 Nefrologia
Area 05 - Scienze biologiche > BIO/09 Fisiologia
Area 06 - Scienze mediche > MED/09 Medicina interna
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > Azienda ASL1, Sassari > Laboratorio di analisi chimico-cliniche e microbiologia
001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
001 Università di Sassari > 03 Istituti > Patologia speciale medica e metodologia clinica
Publisher:Società Italiana di Nefrologia
eISSN:1724-6059
Deposited On:18 Aug 2009 10:02

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