Investigation on beneficial role of l-carnosine in neuroprotective mechanism of ischemic postconditioning in mice: possible role of histidine histamine pathway.

Abstract

OBJECTIVE:

The present study was undertaken to investigate the possible role of histidine-histamine pathway in the neuroprotective effects produced by L-carnosine hand in hand with ischemic postconditioning in the animal model of cerebral ischemia.

METHODS:

Cerebral ischemia was induced in swiss albino mice by performing BCCAO surgery. Morris water-maze test was utilized to assess the learning ability and memory of the animals. The whole brain acetylcholinesterase (AChE) activity, TBARS, GSH levels and MPO activity were evaluated as the biochemical parameters. For histopathological evaluation of the cerebral infarct size, TTC staining was employed.

RESULTS:

Administration of L-carnosine (500   mg/kg, i.p.) successfully attenuated the manifestations of cerebral ischemia. Higher levels of AChE, TBARS, and MPO were observed in BCCAO treated animals, which were successfully attenuated by treatment with L-carnosine and ischemic postconditioning. Whereas administration of L-carnosine and ischemic postconditioning significantly increased the level of GSH in BCCAO treated animals. Moreover, treatment with ranitidine, an H2 blocker (30 NMol, i.c.v) antagonized the neuroprotective actions of L-carnosine evidenced by decrease in MWM performance, increase in the level of AChE and oxidative stress, while decrease in GSH level in brain. The cerebral infarct size was found to be more in BCCAO inflicted animals, which was improved by the administration of L-carnosine, while the cerebral infarct size worsened by treatment with ranitidine (3   nmol, i.c.v.).

CONCLUSION:

It is concluded that L-carnosine exerts neuroprotective effect via involvement of histidine-histamine pathway since the beneficial effects of L-carnosine were abolished by the H2-blocker.

• Authors: Jasleen Kaur Virdi, Amritansh Bhanot, Amteshwar Singh Jaggi, Neha Agarwal
• Journal: The International journal of neuroscience (Int J Neurosci) Vol. 130 Issue 10 Pg. 983-998 (Oct 2020) ISSN: 1563-5279 [Electronic] England
• PMID: 31951767 (Publication Type: Journal Article)

Chemical References

• Histamine H2 Antagonists
• Neuroprotective Agents
• Histidine
• Histamine
• Carnosine

Topics

• Animals
• Brain Ischemia (drug therapy, metabolism, therapy)
• Carnosine (administration & dosage, pharmacology)
• Histamine (metabolism)
• Histamine H2 Antagonists (pharmacology)
• Histidine (metabolism)
• Ischemic Postconditioning
• Male
• Maze Learning (physiology)
• Mice
• Neuroprotective Agents (administration & dosage, pharmacology)
• Signal Transduction (drug effects)