Novel NLRP3 inhibitor INF195: Low doses provide effective protection against myocardial ischemia/reperfusion injury.
Vascul Pharmacol
; 156: 107397, 2024 Sep.
Article
in En
| MEDLINE
| ID: mdl-38897555
ABSTRACT
BACKGROUND:
Several factors contribute to ischemia/reperfusion injury (IRI), including activation of the NLRP3 inflammasome and its byproducts, such as interleukin-1ß (IL-1ß) and caspase-1. However, NLRP3 may paradoxically exhibit cardioprotective properties. This study aimed to assess the protective effects of the novel NLRP3 inhibitor, INF195, both in vitro and ex vivo.METHODS:
To investigate the relationship between NLRP3 and myocardial IRI, we synthetized a series of novel NLRP3 inhibitors, and investigated their putative binding mode via docking studies. Through in vitro studies we identified INF195 as optimal for NLRP3 inhibition. We measured infarct-size in isolated mouse hearts subjected to 30-min global ischemia/one-hour reperfusion in the presence of three different doses of INF195 (5, 10, or 20-µM). We analyzed caspase-1 and IL-1ß concentration in cardiac tissue homogenates by ELISA. Statistical significance was determined using one-way ANOVA followed by Tukey's test. RESULTS ANDCONCLUSION:
INF195 reduces NLRP3-induced pyroptosis in human macrophages. Heart pre-treatment with 5 and 10-µM INF195 significantly reduces both infarct size and IL-1ß levels. Data suggest that intracardiac NLRP3 activation contributes to IRI and that low doses of INF195 exert cardioprotective effects by reducing infarct size. However, at 20-µM, INF195 efficacy declines, leading to a lack of cardioprotection. Research is required to determine if high doses of INF195 have off-target effects or dual roles, potentially eliminating both harmful and cardioprotective functions of NLRP3. Our findings highlight the potential of a new chemical scaffold, amenable to further optimization, to provide NLRP3 inhibition and cardioprotection in the ischemia/reperfusion setting.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Myocardial Reperfusion Injury
/
Caspase 1
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Disease Models, Animal
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Dose-Response Relationship, Drug
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Interleukin-1beta
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Inflammasomes
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NLR Family, Pyrin Domain-Containing 3 Protein
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Mice, Inbred C57BL
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Myocardial Infarction
Limits:
Animals
/
Humans
/
Male
Language:
En
Journal:
Vascul Pharmacol
Journal subject:
ANGIOLOGIA
/
FARMACOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
Italia
Country of publication:
Estados Unidos