Compound IMM-H004, a novel coumarin derivative, protects against CA1 cell loss and spatial learning impairments resulting from transient global ischemia.

Abstract

AIMS:

Compound IMM-H004 (7-hydroxy-5-methoxy-4-methyl-3-[4-methylpiperazin-1-yl]-2H-chromen-2-one) is a new synthetic derivative of coumarin, and previous studies showed that it exhibited antioxidant and neuroprotective roles in focal cerebral ischemia. However, we know little about the compound's function in transient global ischemia. This study is to investigate whether compound IMM-H004 can protect against transient global ischemic injury.

METHODS:

Four-vessel occlusion (4VO) rat model was induced for a 20-min occlusion and different times of reperfusion to mimic transient global cerebral ischemia. IMM-H004 (3, 6, 9 mg/kg) or Edaravone (6 mg/kg) was administered after 30 min of reperfusion. Morris water maze tests were used to estimate the ability of spatial learning and memory. Nissl staining, TUNEL assay and Immunoblot for Bax/Bcl-2 and activated caspase-3 were used to detect hippocampal neuron injury. Immunoblot for PSD-95 and synapsin 1, and electron microscopy were used to observe synaptic function.

RESULTS:

Compared with vehicle group, IMM-H004 significantly improved the spatial learning performance and exhibited less CA1 neurons loss. The expressions of Bax/Bcl-2 and activated caspase-3 were decreased. IMM-H004 also ameliorated synaptic structure, decreased PSD-95 and increased synapsin 1 expression.

CONCLUSION:

These findings suggested that IMM-H004 exerted neuroprotective role in global ischemia by reducing apoptosis and maintaining the integrity of synaptic structure.

• Authors: Wei Zuo, Wei Zhang, Ning Han, Nai-Hong Chen
• Journal: CNS neuroscience & therapeutics (CNS Neurosci Ther) Vol. 21 Issue 3 Pg. 280-8 (Mar 2015) ISSN: 1755-5949 [Electronic] England
• PMID: 25601434 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2015 John Wiley & Sons Ltd.

Chemical References

• Bax protein, rat
• Coumarins
• Disks Large Homolog 4 Protein
• Dlg4 protein, rat
• Free Radical Scavengers
• IMM-H004
• Intracellular Signaling Peptides and Proteins
• Membrane Proteins
• Neuroprotective Agents
• Nootropic Agents
• Synapsins
• bcl-2-Associated X Protein
• Casp3 protein, rat
• Caspase 3
• Edaravone
• Antipyrine

Topics

• Animals
• Antipyrine (analogs & derivatives, pharmacology)
• Brain Ischemia (drug therapy, pathology, physiopathology)
• CA1 Region, Hippocampal (drug effects, pathology, physiopathology)
• Caspase 3 (metabolism)
• Cell Death (drug effects, physiology)
• Coumarins (pharmacology)
• Disease Models, Animal
• Disks Large Homolog 4 Protein
• Drug Evaluation, Preclinical
• Edaravone
• Free Radical Scavengers (pharmacology)
• Intracellular Signaling Peptides and Proteins (metabolism)
• Learning Disabilities (drug therapy, pathology, physiopathology)
• Male
• Maze Learning (drug effects, physiology)
• Membrane Proteins (metabolism)
• Neurons (drug effects, pathology, physiology)
• Neuroprotective Agents (pharmacology)
• Nootropic Agents (pharmacology)
• Random Allocation
• Rats, Sprague-Dawley
• Spatial Memory (drug effects, physiology)
• Synapsins (metabolism)
• bcl-2-Associated X Protein (metabolism)