Summary
This study investigated how heat stress disrupts the equilibrium between oxidative stress markers and the antioxidant defence system in mid-lactating Modicana dairy cows. By measuring plasma biomarkers under thermal challenge, the authors characterise physiological stress responses in this Mediterranean breed, potentially informing management strategies to mitigate heat-induced metabolic dysfunction during lactation.
UK applicability
Findings may be partially relevant to UK dairy systems during increasing summer heat events, though Modicana cattle are a heat-adapted Italian breed and UK dairy herds are predominantly Holstein-Friesian or Jersey. The antioxidant response mechanisms identified could inform nutritional interventions applicable to UK conditions, particularly as climate variability increases.
Key measures
Plasma oxidative markers (likely including malondialdehyde or reactive oxygen species), antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase), total antioxidant capacity, and related biomarkers
Outcomes reported
The study measured plasma oxidative stress markers and antioxidant defence system parameters in mid-lactating Modicana dairy cows exposed to heat stress conditions. Changes in the balance between oxidative damage and antioxidant capacity were quantified to assess physiological responses to thermal challenge.
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