Key result
Porcine heart cryoextract significantly increased reduced glutathione levels by 37.5% and improved antioxidant enzyme activities by day 2 in rats with adrenaline-induced myocardial dystrophy compared to untreated controls.
Why the study?
The study aimed to investigate the cardioprotective mechanisms of porcine heart cryoextract, specifically its regulation of antioxidant defence in cardiomyocytes in an adrenaline-induced myocardial dystrophy model.
Does porcine heart cryoextract improve myocardial antioxidant capacity in rats with adrenaline-induced acute myocardial dystrophy?
Does porcine heart cryoextract improve myocardial antioxidant capacity in rats with adrenaline-induced acute myocardial dystrophy?
Porcine heart cryoextract exerts a cardioprotective effect in an adrenaline-induced myocardial dystrophy rat model by restoring endogenous antioxidant enzymes, surpassing amiodarone in GPx and G-SH normalization.
Answers are grounded in this paper and cite their sources.
Supports antioxidant effects of porcine heart cryoextract in rat model; leaves open human translation and clinical testing.
Background/Aim: In a healthy heart reactive oxygen species (ROS) are by-products of normal metabolism and perform important signalling functions (sometimes referred to as "redox signalling" or oxidative eustress). Aim of this study was to investigate the cardioprotective mechanisms of porcine heart cryoextract, specifically its effect on the regulation of anti-oxidant defence in cardiomyocytes in an adrenaline-induced myocardial dystrophy model. Methods: Eighty-four male rats were divided into four groups: intact control (I), myocardial dystrophy without treatment (II), dystrophy + cryoextract (III) (50 mg peptides per 100 g body weight daily for 14 days) and dystrophy + amiodarone (IV) (10 mg/kg daily for 14 days). Myocardial dystrophy was induced by subcutaneous injection of 0.18 % adrenaline solution (5 mg/kg). On days 2, 7 and 14, superoxide dismutase (SOD), catalase, glutathione peroxidase (GPx) activities and reduced glutathione (G-SH) content were measured in plasma and cardiac tissue using spectrophotometric and flu-orometric assays. Results: On day 2, myocardial dystrophy caused significant decreases in SOD activity (-69.2 %), catalase (-54.4 %), GPx (-40.1 %) and G-SH content (-46.7 %) compared to intact controls (p < 0.001). Cryoextract treatment promoted early restoration of SOD activity (up to 54.6 %), cata-lase (up to +30.8 %), GPx (+6.7 %) and G-SH (+37.5 %) by day 2 (p < 0.01). By day 14, the cryoextract group's enzyme activities and G-SH levels ap-proached those of intact animals and exceeded the effect of amiodarone on GPx and G-SH (p < 0.05). Conclusions: Porcine heart cryoextract exerts a pronounced cardiopro-tective effect in an adrenaline-induced myocardial dystrophy model by re-storing the activity of key endogenous antioxidant enzymes and reduced glutathione levels. It surpasses amiodarone in the speed and extent of GPx and G-SH normalisation, supporting its further investigation as a biothera-peutic agent for correcting oxidative stress in cardiomyopathies.
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Chyzh et al. (2025) studied Adrenaline-induced acute myocardial dystrophy (n=84). Porcine heart cryoextract vs. Untreated myocardial dystrophy (0.9% NaCl) was evaluated on Reduced glutathione (G-SH) level on day 2 (mmol/kg) (+37.5%, p=<0.001). Porcine heart cryoextract significantly increased reduced glutathione levels by 37.5% and improved antioxidant enzyme activities by day 2 in rats with adrenaline-induced myocardial dystrophy compared to untreated controls.
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