Effect of Aloe vera gel coating on antioxidant capacity, antioxidant enzyme activities and decay in raspberry fruit

Antioxidant enzyme activities, superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) and total glutathione concentration were determined in guinea pig lung and liver over the final period of gestation (days 50–68) and at several ages post-partum. Pulmonary antioxidant capacity increased markedly over the final days of gestation, individual changes ranging from 29% (glutathione) to 198% (GSH-Px). Liver antioxidant capacity was always 4-fold to 10-fold greater than that of the lung and exhibited very similar developmental profiles to those observed in the lung. From day 60 gestation to term (68 days), activity of the liver antioxidants increased, ranging from 246% (CAT) to 610% (glutathione). A number of antioxidants in both lung and liver exhibited either immediate pre- or post-birth decreases in activity. These falls could not be attributed to the way in which the results were expressed: i.e. they were similar, expressed per unit DNA, per unit protein, or per g wet wt. Following birth, liver antioxidant capacity increased such that the highest enzyme activities or glutathione concentration were recorded at 66 days post-partum. In lung, only Mn-SOD and glutathione exhibited higher levels at 66 days postpartum than at birth. In combination, these results of pulmonary and hepatic antioxidant enzyme activity indicate that the lung is not unique in acquiring increased antioxidant protection in the final period of gestation. They also suggest that a tissue's antioxidant requirement is dictated more by metabolic rate (hence free radical production) than incident partial pressure of oxygen.

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Antioxidant capacity, antioxidant compounds and antioxidant enzyme activities in five date cultivars during development and ripening

Scientia Horticulturae ◽

10.1016/j.scienta.2011.05.019 ◽

2011 ◽

Vol 129 (4) ◽

pp. 688-693 ◽

Cited By ~ 34

Author(s):

Mohamed A. Awad ◽

Adel D. Al-Qurashi ◽

Saleh A. Mohamed

Keyword(s):

Antioxidant Capacity ◽

Antioxidant Enzyme ◽

Enzyme Activities ◽

Antioxidant Compounds ◽

Antioxidant Enzyme Activities

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Higher Plasma Pyridoxal Phosphate Is Associated with Increased Antioxidant Enzyme Activities in Critically Ill Surgical Patients

BioMed Research International ◽

10.1155/2013/572081 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 6

Author(s):

Chien-Hsiang Cheng ◽

Shih-Chien Huang ◽

Ting-Yu Chiang ◽

Yueching Wong ◽

Yi-Chia Huang

Keyword(s):

Oxidative Stress ◽

Antioxidant Capacity ◽

Antioxidant Enzyme ◽

Critically Ill ◽

Enzyme Activities ◽

Activity Level ◽

Surgical Patients ◽

Vitamin B ◽

Antioxidant Enzyme Activities ◽

Critically Ill Surgical Patients

Critically ill patients experience severe stress, inflammation and clinical conditions which may increase the utilization and metabolic turnover of vitamin B-6 and may further increase their oxidative stress and compromise their antioxidant capacity. This study was conducted to examine the relationship between vitamin B-6 status (plasma and erythrocyte PLP) oxidative stress, and antioxidant capacities in critically ill surgical patients. Thirty-seven patients in surgical intensive care unit of Taichung Veterans General Hospital, Taiwan, were enrolled. The levels of plasma and erythrocyte PLP, serum malondialdehyde, total antioxidant capacity, and antioxidant enzyme activities (i.e., superoxide dismutase (SOD), glutathione S-transferase, and glutathione peroxidase) were determined on the 1st and 7th days of admission. Plasma PLP was positively associated with the mean SOD activity level on day 1 (r=0.42,P<0.05), day 7 (r=0.37,P<0.05), and on changes (Δ (day 7 − day 1)) (r=0.56,P<0.01) after adjusting for age, gender, and plasma C-reactive protein concentration. Higher plasma PLP could be an important contributing factor in the elevation of antioxidant enzyme activity in critically ill surgical patients.

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