Abstract:
:We have examined the effects of isotonic hypovolemia on the expression of the neuronal nitric oxide synthase (nNOS) gene in the paraventricular (PVN) and supraoptic nuclei (SON) of the rat, using in situ hybridization histochemistry with a 35S-labelled oligodeoxynucleotide probe complementary to nNOS mRNA. Intraperitoneal (i.p.) administration of polyethylene glycol (PEG) (MW 4000, 20 ml/kg body weight) dissolved in 0.9% saline (20% w/v) induced isotonic hypovolemia. The expression of the nNOS gene in the PVN and SON 6 h after i.p. administration of PEG was increased significantly in comparison with controls. The dual staining for NADPH diaphorase activity and Fos-like immunoreactivity (Fos-LI) showed that at 3 and 6 h after i.p. administration of PEG, a subpopulation of NADPH diaphorase-positive cells in the PVN and SON exhibited nuclear Fos-LI. These results suggest that NO in the PVN and SON may be involved in the neuroendocrine and autonomic responses to non-osmotic hypovolemia.
journal_name
Brain Resjournal_title
Brain researchauthors
Ueta Y,Levy A,Lightman SL,Hara Y,Serino R,Nomura M,Shibuya I,Hattori Y,Yamashita Hdoi
10.1016/s0006-8993(97)01531-xsubject
Has Abstractpub_date
1998-04-20 00:00:00pages
25-32issue
1-2eissn
0006-8993issn
1872-6240pii
S0006-8993(97)01531-Xjournal_volume
790pub_type
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