What is the clinical evidence from this study?

Population: Myocardial ischaemia-reperfusion injury (n=21). Intervention: n-3 polyunsaturated fatty acids (PUFAs) vs. Standard diet. Primary outcome: Infarct size (IS) and left ventricular function (30.6% (D1) and 48.5% (D2) reduction in IS, p=<0.05).

What question did this study set out to answer?

To evaluate whether chronic supplementation with n-3 polyunsaturated fatty acids reduces myocardial infarct size and improves oxidative stress markers during ischaemia-reperfusion injury.

October 24, 2013Cell Biochemistry and FunctionOpen Access

Omega 3 chronic supplementation attenuates myocardial ischaemia‐reperfusion injury through reinforcement of antioxidant defense system in rats

Q: What are the key findings of this study?

Chronic supplementation with n-3 PUFAs reduced infarct size by 30.6% and 48.5% in a dose-dependent manner in a rat model of myocardial ischaemia-reperfusion injury (p < 0.05).

Q: What question did this study set out to answer?

To evaluate whether chronic supplementation with n-3 polyunsaturated fatty acids reduces myocardial infarct size and improves oxidative stress markers during ischaemia-reperfusion injury.

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Key result

Chronic supplementation with n-3 PUFAs reduced infarct size by 30.6% and 48.5% in a dose-dependent manner in a rat model of myocardial ischaemia-reperfusion injury (p < 0.05).

Why the study?

Does chronic supplementation with n-3 PUFAs reduce infarct size and improve oxidative stress in a rat model of myocardial ischaemia-reperfusion injury?

Key Points

To evaluate whether chronic supplementation with n-3 polyunsaturated fatty acids reduces myocardial infarct size and improves oxidative stress markers during ischaemia-reperfusion injury.
Rats received daily oral n-3 polyunsaturated fatty acids at 0.6 g/kg (n = 7), 1.2 g/kg (n = 7), or a standard diet (n = 7) for 8 weeks.
Ex vivo rat hearts underwent 30 minutes of global ischaemia followed by 120 minutes of reperfusion to assess infarct size, ventricular function, and antioxidant status.
Supplementation reduced infarct size in a dose-dependent manner by 30.6% in the 0.6 g/kg group and 48.5% in the 1.2 g/kg group, while maintaining higher left ventricular developed pressure at the end of reperfusion (p < 0.05).
Supplemented hearts exhibited higher basal glutathione ratios and increased activities of catalase, superoxide dismutase, and glutathione peroxidase (p < 0.05), which avoided significant depletion after reperfusion (p > 0.05).

Structured PICO

Does chronic supplementation with n-3 PUFAs reduce infarct size and improve oxidative stress in a rat model of myocardial ischaemia-reperfusion injury?

Population

21 rats subjected to an ex vivo model of 30 min global ischaemia and 120 min of reperfusion after 8 weeks of dietary supplementation.

Intervention

Chronic supplementation with n-3 polyunsaturated fatty acids (PUFAs) at two doses: D1 (0.6 g/kg/d) and D2 (1.2 g/kg/d) for 8 weeks

Comparator

Standard diet

Outcome

Infarct size and left ventricular functionsurrogate

Main Result

Effect estimate: 30.6% (D1) and 48.5% (D2) reduction in IS

p-value: p=<0.05

Chronic supplementation with n-3 PUFAs induces cardioprotection against ischaemia-reperfusion injury in rats by reinforcing the antioxidant defense system.

Discussion

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Implication

Hypothesis-generating for n-3 PUFA cardioprotection; leaves open translation from rat models to clinical ischaemia-reperfusion injury.

Cite This Study

Castillo et al. (2013) studied Myocardial ischaemia-reperfusion injury (n=21). n-3 polyunsaturated fatty acids (PUFAs) vs. Standard diet was evaluated on Infarct size (IS) and left ventricular function (30.6% (D1) and 48.5% (D2) reduction in IS, p=<0.05). Chronic supplementation with n-3 PUFAs reduced infarct size by 30.6% and 48.5% in a dose-dependent manner in a rat model of myocardial ischaemia-reperfusion injury (p < 0.05).

synapsesocial.com/papers/6a859d77d06b31cc19d0ce73 https://doi.org/10.1002/cbf.3012

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Omega 3 chronic supplementation attenuates myocardial ischaemia‐reperfusion injury through reinforcement of antioxidant defense system in rats

Key Points

Structured PICO

Main Result

Discussion

Implication

Cite This Study

Omega 3 chronic supplementation attenuates myocardial ischaemia‐reperfusion injury through reinforcement of antioxidant defense system in rats

Key Points

Structured PICO

Main Result

Discussion

Implication

Cite This Study

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