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Updated: Jun 26, 2026

Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD
Published on: October 10, 2012
[Modifications of hypothalamic neurohormone expression in animal model of post-traumatic stress disorder]
Abstract:
Neuroendocrine mechanisms of development of anxiety-like state in rats in experimental model of human post-traumatic stress disorder (PTSD), referred to as stress-restress paradigm, have been studied. Immunocytochemistry has revealed significant increase of CRH expression in both parvo- and magnocellular subdivisions of paraventricular nuclei up to 10th post-stress day. Significant reduction of vasopressin expression in rats' hypothalamic paravntricular nuclei has been detected on the 1st post-stress day. Vasopressin immunoreactivity in hypothalamus of stressed animals was indistinguishable from that in control group on the 10th post-stress day only in parvocellular subdivision of the paraventricular nucleus, while it was increased in magnocellular subdivision of the nucleus in experimental group compared to controls. The results imply a plausible role of hypothalamic vasopressin along with CRH on the development of PTSD.
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