Nitric oxide synthase-containing neurons in the human hypothalamus: reduced number of immunoreactive cells in the paraventricular nucleus of depressive patients and schizophrenics.

Abstract:

:The neuroanatomical distribution of nitric oxide synthase-immunoreactive neurons was investigated in post mortem hypothalami of 10 patients suffering from schizophrenia, eight patients with depression and 13 matched control cases. Neuronal nitric oxide synthase containing nerve cells were detected in several hypothalamic nuclei including the medial preoptic region, the ventromedial, infundibular and suprachiasmatic nuclei and the lateral hypothalamus. The vast majority of hypothalamic nitric oxide synthase-immunoreactive neurons was found to be located in the paraventricular nucleus. Both magno and parvocellular paraventricular neurons contained the enzyme. A small subset of immunoreactive parvocellular paraventricular neurons co-expresses corticotropin-releasing hormone. The supraoptic nucleus did not contain nitric oxide synthase-immunoreactive neurons. Cell counts of paraventricular nitric oxide synthase-positive neurons in controls, schizophrenics and depressed patients revealed a statistically significant reduction of cell density in the right paraventricular nucleus of depressed patients and schizophrenics as compared to controls. The total amount of nitric oxide synthase-immunoreactive paraventricular neurons was smaller in depressive and schizophrenic patients than in normal cases. The putative pathophysiologic significance of the reduced expression of paraventricular nitric oxide synthase in depressive patients might be related to the supposed regulatory function of nitric oxide in the release of corticotropin-releasing hormone and arginine-vasopressin and/or oxytocin, which have been reported to be over-expressed in the so-called endogenous psychoses, especially in depression.

journal_name

Neuroscience

journal_title

Neuroscience

authors

Bernstein HG,Stanarius A,Baumann B,Henning H,Krell D,Danos P,Falkai P,Bogerts B

doi

10.1016/s0306-4522(97)00461-2

subject

Has Abstract

pub_date

1998-04-01 00:00:00

pages

867-75

issue

3

eissn

0306-4522

issn

1873-7544

pii

S0306-4522(97)00461-2

journal_volume

83

pub_type

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