What is the clinical evidence from this study?

Study design: Other. Population: Myocardial ischemia/reperfusion injury. Intervention: β2 AR-C265S knock-in (lacking S-nitrosylation site) vs. Wild-type (WT) mice. Primary outcome: Infarct size.

October 9, 2025Circulation Research

Abstract Wed016: Loss of β 2 Adrenergic Receptor S-nitrosylation Protects Against Myocardial Injury

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Key result

Disrupting β2AR S-nitrosylation cuts ischemia/reperfusion infarct size by ~44% in mice.

Why the study?

Does the loss of β2 adrenergic receptor S-nitrosylation reduce infarct size and improve cardiac function in a mouse model of ischemia/reperfusion injury?

Population

Female and male wild-type C57BL/6 mice and transgenic mice lacking the β2AR S-nitrosylation site (β2AR-C265S…

Comparison

β2AR-C265S knock-in mutation vs Wild-type (WT) C57BL/6 mice

Design

Preclinical

Follow-up

24 hours

Authors

TRThiele Osvaldt RosalesDuke University HFHeriberto Rodríguez FraustoUniversidad Autónoma de Zacatecas "Francisco García Salinas"RRRajika RoyDuke University

Discussion

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Implication

The loss of β2 adrenergic receptor S-nitrosylation attenuates infarct size and improves cardiac function in a mouse model of acute myocardial ischemia/reperfusion injury.

Key Points

Mice lacking S-nitrosylation at β2 adrenergic receptors showed reduced infarct size and improved cardiac function after ischemia.
Infarct size was significantly lower in β2 AR-C265S KI mice at 32%, compared to 57% in β2 AR WT under identical conditions.
Ejection fraction and left ventricular mass were markedly improved in the β2 AR-C265S KI group after reperfusion, supporting enhanced recovery.
The preservation of receptor function highlights S-nitrosylation's critical role in cardiac injury response, informing potential new treatments.

Structured PICO

Does the loss of β2 adrenergic receptor S-nitrosylation reduce infarct size and improve cardiac function in a mouse model of ischemia/reperfusion injury?

Population

Female and male wild-type and β2 AR-C265S knock-in mice subjected to myocardial ischemia-reperfusion injury.

Exposure

β2AR-C265S knock-in (KI) mutation (lacking the β2AR S-nitrosylation site)

Comparator

Wild-type (WT) C57BL/6 mice

Outcome

Infarct size and hemodynamic parameters (ejection fraction, left ventricular mass, and fractional shortening) 24 hours after ischemia/reperfusion surgerysurrogate

Main Result

Absolute Event Rate: 32% vs 57%

The loss of β2 adrenergic receptor S-nitrosylation attenuates infarct size and improves cardiac function in a mouse model of acute myocardial ischemia/reperfusion injury.

Cite This Study

Rosales et al. (2025) studied Myocardial ischemia/reperfusion injury. β2 AR-C265S knock-in (lacking S-nitrosylation site) vs. Wild-type (WT) mice was evaluated on Infarct size. Mice lacking the β2 adrenergic receptor S-nitrosylation site (β2 AR-C265S knock-in) had reduced ischemia/reperfusion-induced infarct size (32%) compared to wild-type mice (57%).

synapsesocial.com/papers/68e77f09d1c187e1c108fbb9 https://doi.org/10.1161/res.137.suppl_1.wed016

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Implication

The loss of β2 adrenergic receptor S-nitrosylation attenuates infarct size and improves cardiac function in a mouse model of acute myocardial ischemia/reperfusion injury.

Abstract Wed016: Loss of β 2 Adrenergic Receptor S-nitrosylation Protects Against Myocardial Injury

Discussion

Member takes

Implication

Key Points

Structured PICO

Main Result

Cite This Study

Abstract Wed016: Loss of β 2 Adrenergic Receptor S-nitrosylation Protects Against Myocardial Injury

Discussion

Member takes

Implication

Key Points

Structured PICO

Main Result

Cite This Study

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