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Updated: May 25, 2026

Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
Published on: July 19, 2019
Therapeutic potential of carbon monoxide in multiple sclerosis
1Department of Bio-medical Sciences, University of Catania, Catania, Italy.
Insights
Carbon monoxide (CO), generated by haem oxygenase (HO), has anti-inflammatory effects. Carbon monoxide-releasing molecules (CORMs) may offer novel therapeutic strategies for central nervous system inflammation, including multiple sclerosis.
Area of Science:
- Neuroscience
- Immunology
- Pharmacology
Background:
- Carbon monoxide (CO) is a product of haem catabolism by haem oxygenase (HO) enzymes.
- Physiological roles of CO include vasodilation, neurotransmission, and anti-inflammatory actions.
- Exogenous CO administration shows promise for treating immune dysregulation.
Purpose of the Study:
- To review the physiological and anti-inflammatory roles of the HO/CO pathway in the central nervous system (CNS).
- To discuss the therapeutic potential of carbon monoxide-releasing molecules (CORMs) in preclinical models of inflammation.
- To evaluate CORMs as a potential disease-modifying therapy for multiple sclerosis.
Main Methods:
- Literature review of studies on the HO/CO pathway and CORMs.
- Analysis of preclinical data on CORM efficacy in inflammatory models.
- Synthesis of evidence regarding CORMs' impact on CNS inflammation.
Main Results:
- The HO/CO pathway plays significant physiological and anti-inflammatory roles within the CNS.
- CORMs effectively deliver controlled CO quantities, demonstrating anti-inflammatory effects in preclinical settings.
- Preclinical data suggest CORMs possess disease-modifying potential.
Conclusions:
- CORMs represent a promising class of compounds for managing CNS inflammation.
- The therapeutic application of CORMs in multiple sclerosis warrants further investigation.
- Targeting the HO/CO pathway with CORMs may offer novel treatment strategies.
Abstract:
Carbon monoxide (CO) is produced during the catabolism of free haem, catalyzed by haem oxygenase (HO) enzymes, and its physiological roles include vasodilation, neurotransmission, inhibition of platelet aggregation and anti-proliferative effects on smooth muscle. In vivo preclinical studies have shown that exogenously administered quantities of CO may represent an effective treatment for conditions characterized by a dysregulated immune response. The carbon monoxide-releasing molecules (CORMs) represent a group of compounds capable of carrying and liberating controlled quantities of CO in the cellular systems. This review covers the physiological and anti-inflammatory properties of the HO/CO pathway in the central nervous system. It also discusses the effects of CORMs in preclinical models of inflammation. The accumulating data discussed herein support the possibility that CORMs may represent a novel class of drugs with disease-modifying properties in multiple sclerosis.
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