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The physiological properties of endogenous oligopeptides that enhance resistance to emotional stress

Iumatov, E.A.; Salieva, R.M.

Zhurnal Vysshei Nervnoi Deiatelnosti Imeni i P Pavlova 43(2): 318-325

1993

ISSN/ISBN: 0044-4677
PMID: 7686317
Accession: 044707647

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Summary
In the work was studied the effect of the delta-sleep inducing peptide (DSIP) on the substance P (SP) content in the hypothalamus of August rats genetically predisposed to emotional stress. The hypothalamic SP level increased 3 h and 6 h after systemic i. p. DSIP administration in doses of 60 and 120 nM/kg. The effects of i. p. DSIP administration on the hypothalamic SP were studied on an experimental model of aggressive-conflict behaviour in rats. The peptide was injected before the animals were exposed to stress. Quintuple DSIP administration in the above mentioned doses before exposing rats to stress induced highly significant increase in the hypothalamic SP. Single DSIP injections also significantly elevated SP values, reduced the adrenal hypertrophy and the thymus involution resulting in an increase of the rats' survival as compared to the control animals exposed to stress without DSIP. The antistressor effect of DSIP is assumed to be realized through the increase of the hypothalamic SP which is a factor enhancing the animal resistance to emotional stress.

References

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