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ABSTRACT
Glutathione peroxidase (GPx) is an antioxidant enzyme that plays a crucial role in protecting cells from oxidative stress by catalyzing the reduction of hydrogen peroxide and organic hydroperoxides. In the context of asthma, oxidative stress is known to contribute to airway inflammation and hyperresponsiveness. The study you mentioned seems to investigate the effects of Adansonia digitata crude extract on glutathione peroxidase activities in the lung tissue of guinea pigs with ovalbumin-induced asthma. 20 Guinea pigs weighing between 200g and 420g of both sexes, were obtained. One week was spent housing the animals in the animal house for their acclimatization before the experiment began. The four groups of guinea pigs were sensitized to ovalbumin on the first day of the experiment by intraperitoneally administering 2mg of ovalbumin and 200mg of aluminium hydroxide diluted in 10mL of normal saline solution. Group 1 (sensitized, induced, and exposed) and Group 2 (sensitized and exposed) exhibited significantly lower GPx activities in the lung tissue compared to the control group (Group 4). The mean GPx activities for Group 1 (5.704 ± 0.271) and Group 2 (5.832 ± 0.398) were statistically significantly different from the control group (6.237 ± 0.36). Notably, the group that was only exposed to ovalbumin without prior sensitization and induction (Group 3) did not exhibit a significant difference in GPx activity compared to the control group. This finding implies that mere exposure to ovalbumin alone may not be sufficient to induce substantial changes in GPx activity in the lung tissue. These findings contribute to our understanding of the role of oxidative stress and antioxidant defense mechanisms in asthma pathogenesis and provide a foundation for future studies exploring natural products like Adansonia digitata as potential therapeutic interventions in asthma management.
