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Carbon monoxide-triggered health effects: the important role of the inflammasome and its possible crosstalk with autophagy and exosomes

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Abstract

Carbon monoxide (CO) has long been known as a “silent killer” because of its ability to bind hemoglobin (Hb), leading to reduced oxygen carrying capacity of Hb, which is the main cause of CO poisoning (COP) in humans. Emerging studies suggest that mitochondria is a key target of CO action that can impact key biological processes, including apoptosis, cellular proliferation, inflammation, and autophagy. Despite its toxicity at high concentrations, CO also exhibits cyto- and tissue-protective effects at low concentrations in animal models of organ injury and disease. Specifically, CO modulates the production of pro- or anti-inflammatory cytokines and mediators by regulating the NLRP3 inflammasome. Given that human diseases are strongly associated with inflammation, a deep understanding of the exact mechanism is helpful for treatment. Autophagic factors and inflammasomes interact in various situations, including inflammatory disease, and exosomes might function as the bridge between the inflammasome and autophagy activation. Thus, the interplay among autophagy, mitochondrial dysfunction, exosomes, and the inflammasome may play pivotal roles in the health effects of CO. In this review, we summarize the latest research on the beneficial and toxic effects of CO and their underlying mechanisms, focusing on the important role of the inflammasome and its possible crosstalk with autophagy and exosomes. This knowledge may lead to the development of new therapies for inflammation-related diseases and is essential for the development of new therapeutic strategies and biomarkers of COP.

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Abbreviations

CO:

Carbon monoxide

Hb:

Hemoglobin

COHb:

Carboxyhemoglobin

ROS:

Reactive oxygen species

HO:

Heme oxygenase

BV:

Biliverdin

BR:

Bilirubin

IL-1β:

Interleukin-1β

miRs:

MicroRNAs

COP:

Carbon monoxide poisoning

DM:

Diabetes mellitus

IRR:

Incidence rate ratios

CI:

Confidence interval

CK:

Creatine kinase

BNP:

Brain natriuretic peptide

FABP:

Fatty acid-binding protein

TLR4:

Toll-like receptor 4

LPS:

Lipopolysaccharide

MAPK:

Mitogen-activated protein kinase

ASC:

Apoptosis-associated speck-like protein containing caspase-recruitment domain

NO:

Nitric oxide

mtROS:

Mitochondrial ROS

COPD:

Chronic obstruction pulmonary disease

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Acknowledgements

This work was supported by the Ministry of Science and Technology, Taiwan through Grants MOST 108-2638-B-006-001-MY2, MOST 107-2311-B-006-004-MY3, MOST 108-2314-B-384-010, MOST 109-2314-B-384-005-MY3, MOST 108-2314-B-039-061–MY3, MOST 109-2314-B-006-051-MY3, and MOST 108-2314-B-006-057. Figure 1 were created using BioRender.com.

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Authors

Contributions

R-JC writing—original draft, writing—review and editing. Y-HL writing—original draft, writing—review and editing. T-HC writing—original draft. Y-YC writing—original draft. Y-LY writing—original draft. C-PC conceptualization. C-CH conceptualization. H-RG conceptualization, writing—review and editing. Y-JW conceptualization, writing—original draft, writing—review and editing, supervision.

Corresponding authors

Correspondence to How-Ran Guo or Ying-Jan Wang.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Chen, RJ., Lee, YH., Chen, TH. et al. Carbon monoxide-triggered health effects: the important role of the inflammasome and its possible crosstalk with autophagy and exosomes. Arch Toxicol 95, 1141–1159 (2021). https://doi.org/10.1007/s00204-021-02976-7

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  • DOI: https://doi.org/10.1007/s00204-021-02976-7

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