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Review
. 2021:182:107-120.
doi: 10.1016/B978-0-12-819973-2.00008-3.

The implications of hypothalamic abnormalities for schizophrenia

Hans-Gert Bernstein  1 , Gerburg Keilhoff  2 , Johann Steiner  3
Affiliations
Review

The implications of hypothalamic abnormalities for schizophrenia

Hans-Gert Bernstein et al. Handb Clin Neurol. 2021.

Abstract

Until a few years ago, the hypothalamus was believed to play only a marginal role in schizophrenia pathophysiology. However, recent findings show that this rather small brain region involved in many pathways found disrupted-in schizophrenia. Gross anatomic abnormalities (volume changes of the third ventricle, the hypothalamus, and its individual nuclei) as well as alterations at the cellular level (circumscribed loss of neurons) can be observed. Further, increased or decreased expression of hypothalamic peptides such as oxytocin, vasopressin, several factors involved in the regulation of appetite and satiety, endogenous opiates, products of schizophrenia susceptibility genes as well as of enzymes involved in neurotransmitter and neuropeptide metabolism have been reported in schizophrenia and/or animal models of the disease. Remarkably, although profound disturbances of the hypothalamus-pituitary-adrenal axis, hypothalamus-pituitary-thyroid axis, and the hypothalamus-pituitary-gonadal axis are typical signs of schizophrenia, there is currently no evidence for alterations in the expression of hypothalamic-releasing and inhibiting factors that control these hormonal axes. Finally, the implications of hypothalamus for disease-related disturbances of the sleep-wakefulness cycle and neuroimmune dysfunctions in schizophrenia are outlined.

Keywords: Corticotropin-releasing hormone; Gonadotropin-releasing hormone; Growth hormone-releasing hormone; Hypothalamus; Neuroimmunology; Neuropathologic alterations; Nitric oxide; Opiates; Oxytocin; Schizophrenia; Suprachiasmatic nucleus; Thyrotropin-releasing hormone; Vasopressin.

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