[Structural and functional organization of the cerebral cortex neurons in rats with various resistance to emotional stress following administration of delta-sleep-inducing peptide].
Bogolepov. N N NN; Popova. E N EN; Koplik. E V EV; Krivitskaia. G N GN; Sudakov. K V KV
Key Findings
- Rats with low stress resistance showed a loss of normal‑looking neurons and an increase in damaged, overly dark or light‑staining cells after stress.
- Giving DSIP before stress prevented the appearance of ischemic (oxygen‑deprived) damaged cells in all rats.
- DSIP reduced the shrinkage of severely hyperchromatic neurons, especially in stress‑prone rats, suggesting an anti‑hypoxic and anti‑stress effect.
Practical Outcomes
- The study hints that DSIP might help protect the brain from stress‑related oxygen loss, but it’s an animal experiment with no human dosing or safety data. For biohackers, it’s an interesting lead but not yet ready for a real‑world protocol; further research is needed before considering DSIP supplementation for stress or cognitive protection.
Summary
In rats that are prone to emotional stress, a single dose of delta‑sleep‑inducing peptide (DSIP) given an hour before a stressful event protected brain cells from damage caused by low oxygen and reduced the harmful changes that stress normally causes in the cortex.
Abstract
In Wistar rats with different resistance to emotional stress (ES), subjected to stress exposure (SE), the structural organization of neurons in layer V of sensomotor cortex was studied quantitatively in brain sections stained using Nissl's cresyl violet method. One group of animals was injected with delta sleep-inducing peptide (DSIP) 1 hr before SE. In rats of control group predisposed to ES, the amount of normochromatic and moderately hypochromatic neurons was decreased as compared to the rats resistant to ES. After SE, normochromatic neurons were not demonstrated. In rats predisposed to ES, the contents of moderately hypo- and hyperchromatic neurons was found to fall dramatically with a simultaneous increase in the number of extremely hypo- and hyperchromatic neurons, ghost cells and ischemically changed cells. After DSIP infusion before SE, ischemically damaged cells were not found in any group, while the degree of shrinkage of extremely hyperchromatic neurons was lower in rats predisposed to ES as compared to rats resistant to ES. It is suggested that brain hypoxia plays an important role in cortex disorganization during ES, whereas DSIP, possesses both antistress and antihypoxic effects.
Study Information
pubmed
2003