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The bioavailability of vitamin C from pulsed electric fields (PEF)-treated vegetable soup in comparison with freshly made (FM) vegetable soup--gazpacho--and its impact on 8-epi[PGF.sub.2[alpha]] and uric acid concentrations in a human population were assessed. For this purpose six subjects consumed 500 ml PEF-treated vegetable soup/day, and six subjects consumed 500 ml FM vegetable soup/day for 14 days. On the first day of the study, the subjects drank the vegetable soup in one dose (dose response study), and on days 2-14 they consumed 250 ml in the morning and 250 ml in the afternoon (multiple-dose response study). Blood was collected every hour for 6 h on the first day and again on days 7 and 14. All blood samples were analyzed for vitamin C, 8-epi[PGF.sub.2[alpha]], and uric acid. The maximum increase in plasma vitamin C occurred 3 h post-dose in both the PEF and the FM groups. Vitamin C remained significantly higher (P [less than or equal to] 0.05) on days 7 and 14. The plasma 8-epi[PGF2.sub.[alpha]] concentration was significantly lower at the end of the study in both the PEF group (P=0.002) and the FM group (P=0.05). Plasma levels of vitamin C and 8-epi[PGF2.sub.[alpha]] were inversely correlated in both groups (r = -0.549, P=0.018; and r= -0.743, P=0.0004, respectively). To summarize, drinking two servings (500 ml) of PEF-treated or FM gazpacho daily increases plasma vitamin C and significantly decreases 8-epi[PGF2.sub.[alpha]] concentrations in healthy humans.

Current evidence supports a significant association between fruit and vegetable intake and health. In this study, we assessed the effect of consuming a vegetable-soup 'gazpacho' on vitamin C and biomarkers of oxidative, stress and inflammation in a healthy human population. We also examined the association between vitamin C and [F.sub.2]-isoprostanes (8-epiPG[F.sub.2[alpha]]), uric acid (UA), prostaglandin [E.sub.2] (PG[E.sub.2]), monocyte chemotactic protein-1 (MCP-1), and the cytokines, tumor necrosis factor-[alpha] (TNF-[alpha]), interleukin-1[beta] (IL-1[beta]), and IL-6. Gazpacho is a Mediterranean dish defined as a ready-to-use vegetable soup, containing ~80% crude vegetables rich in vitamin C. Subjects (6 men, 6 women) enrolled in this study consumed 500 mL/d of gazpacho corresponding to an intake of 72 mg of vitamin C. On d 1, subjects consumed the gazpacho in one dose; from d 2 until the end of the study, d 14, 250 mL was consumed in the morning and 250 mL in the afternoon. Blood was collected before drinking the soup (baseline) and on d 7 and 14. Baseline plasma vitamin C concentrations did not differ between men and women (P = 0.060). Compared with baseline, the vitamin C concentration was significantly higher on d 7 and 14 of the intervention in both men and women (P < 0.05). Baseline plasma levels of UA and [F.sub.2]-isoprostanes were higher (P [less than or equal to] 0.002) in men than in women. The [F.sub.2]-isoprostanes decreased on d 14 in men and women (P [greater than or equal to] 0.041), and UA decreased in men (P = 0.028). The concentrations of vitamin C and 8-epiPG[F.sub.2alpha] were inversely correlated (r = -0.585, P = 0.0002). Plasma PG[E.sub.2] and MCP-1 concentrations decreased in men and women (P [less than or equal to] 0.05) on d 14, but those of TNF-[alpha], IL-1/[beta], and IL-6 did not change. Consumption of the vegetable soup decreases oxidative stress and biomarkers of inflammation, which indicates that the protective effect of vegetables may extend beyond their antioxidant capacity. KEY WORDS: * vegetable soup * vitamin C * [F.sub.2]-isoprostanes * inflammation

We examined the bioavailability of vitamin C in orange juice processed using high pressure (HP) and its effects on plasma levels of vitamin C, uric acid (UA), F2-isoprostanes (8-epiPG[F.sub.2[alpha]]), C-reactive protein (CRP) and prostaglandin [E.sub.2] (PG[E.sub.2]) in a healthy human population. Subjects (6 men, 6 women) enrolled in the study consumed 500 mL/d of HP orange juice for 14 d, corresponding to an intake of 250 mg of vitamin C. On d 1 of the study, subjects drank the juice in one dose; on d 2 until the end of the study, d 14, they drank 250 mL in the morning and 250 mL in the afternoon. Blood was collected every h for 6 h, on d 1, and then on d 7 and 14 of the study. Baseline plasma vitamin C concentration was higher (P = 0.014) in women (55.8 [+ or -] 3.8 [micro]mol/L) than in men (42.8 [+ or -] 2.1 [micro]mol/L). The maximum plasma vitamin C increase occurred 3 h after drinking the juice, and it remained elevated on d 7 and 14. Plasma 8-epiPG[F.sub.2[alpha]] concentration did not differ between men and women at baseline. However, it was lower at the end of the study in both men (P = 0.044) and women (P = 0.034). Plasma levels of vitamin C and 8-epiPG[F.sub.2[alpha]] were inversely correlated (r = -0.615, P = 0.001). Plasma CRP concentrations tended to be lower on d 14 than at baseline in men (P = 0.317) and women (P = 0.235). Plasma PG[E.sub.2] was lower at the end of the study in both men and women (P [less than or equal to] 0.037). Drinking orange juice increases plasma vitamin C, and decreases 8-epiPG[F.sub.2[alpha]] and PG[E.sub.2] levels in humans, which may help reduce the risk of chronic diseases. KEY WORDS: * high-pressurized orange juice * vitamin C * F2-isoprostanes * C-reactive protein * prostaglandin [E.sub.2]

Abstract Background Studies exploring the role of diet during pregnancy are still scarce, in part due to the complexity of measuring diet and to the lack of valid instruments. The aim of this study was to examine the reproducibility and validity (against biochemical biomarkers) of a semi-quantitative food frequency questionnaire (FFQ) in pregnant women. Methods Participants were 740 pregnant women from a population-based birth cohort study in Valencia (INMA Study). We compared nutrient and food intakes from FFQs estimated for two periods of pregnancy (reproducibility), and compared energy-adjusted intake of several carotenoids, folate, vitamin B12, vitamin C and α-tocopherol of the FFQ in the first trimester with their concentration in blood specimens (validity). Results Significant correlations for reproducibility were found for major food groups and nutrients but not for lycopene (r=0.06); the average correlation coefficients for daily intake were 0.51 for food groups and 0.61 for nutrients. For validity, statistically significant correlations were observed for vitamin C (0.18), α-carotene (0.32), β-carotene (0.22), lutein-zeaxantin (0.29) and β-cryptoxantin(0.26); non-significant correlations were observed for retinol, lycopene, α-tocopherol, vitamin B12 and folate (r≤0.12). When dietary supplement use was considered, correlations were substantially improved for folate (0.53) and to a lesser extent for vitamin B12 (0.12) and vitamin C (0.20). Conclusion This study supports that the FFQ has a good reproducibility for nutrient and food intake, and can provide a valid estimate of several important nutrients during pregnancy.

Background: The food frequency questionnaire (FFQ) is the most efficient and cost-effective method to investigate the relationship between usual diet and disease in epidemiologic studies. Although FFQs have been validated in many adult populations worldwide, the number of valid FFQ in preschool children is very scarce. The aim of this study was to evaluate the reproducibility and validity of a semi-quantitative FFQ designed for children aged 4 to 5 years. Materials and methods: In this study, we have included 169 children aged 4–5 years from the INMA project in Valencia, a population-based prospective cohort study of mothers and children in Spain. The 105-items FFQ was administered twice to the parents or care-givers of children over a 9-month period. Reproducibility was explored by comparing intake of nutrients by the FFQs, while validity was examined by comparing the nutrient values from the FFQs with the average nutrient values of three 24 hour dietary recall (24hDR) taken in the period, and also, with the concentration in blood specimens for several vitamins (carotenoids, folate, vitamin B12, vitamin C and α-tocopherol). Pearson correlation coefficients and de-attenuated correlation coefficients were calculated and we also evaluated misclassification by quintile distribution. Results: All correlation coefficients for reproducibility for nutrients and major food groups were statistically significant; the average correlation coefficients for daily intake were 0.43 for food groups and 0.41 for nutrients. The average correlation coefficients for validity for daily intakes against 24hDR was r = 0.30, and the average for de-attenuated correlation coefficients was r = 0.44. When evaluating validity against the blood concentration of vitamins, statistically significant correlations were observed for vitamin C (0.35), lycopene (0.31), β-Cryptoxantin (0.40), and vitamin E (0.29); the average of correlation coefficients was r = 0.21. Conclusion: Despite some low to moderate correlations for reproducibility and validity, overall this study suggests that the FFQ may be a good method for assessing a wide range of food groups and nutrients intake in children aged 4–5 years. [ABSTRACT FROM AUTHOR]

Abstract Free radicals are involved in ischemia-reperfusion injury and inflammatory processes. The commercial formulation of the anesthetic propofol contains &#x03B- tocopherol and ö-tocopherol, which may exert antioxidant effects during transplantation. Animals were randomly assigned to a control group or experimental groups for lung transplantation after 3 and 24 h of ischemia. Individual tocopherols, malondi aldehyde, biochemical indices, and hemodynamic, blood gas, and ventilatory parameters were determined during reperfusion. Results showed that administration of commercially available prop ofol provoked a time- and dose-dependent increment in serum &#x03B3-tocopherol and δ-tocopherol in control animals and in the group receiving lungs subjected to 3 h of ischemia, but not in the group with 24 h of ischemia. Malondialdehyde levels increased during reperfusion and did not differ significantly between the two experimental groups, which did not differ with respect to lung function either. &#x03B3-Tocopherol, supplied by the anesthetic, may act as an antioxidant that is consumed during reperfusion. This potential effect could be relevant to the choice of anesthetic agents in situations where free radical damage to tissues is expected. [ABSTRACT FROM AUTHOR]

We report the results of a study on the influence of season and sex on serum concentrations of six carotenoids, retinol, and α-tocopherol, as determined by reversed-phase HPLC. The subjects were 111 healthy individuals (54 females, 57 males); 18 additional subjects (10 females, 8 males) were assessed for within-subject longitudinal seasonal variations. Men presented significantly higher retinol concentrations (f = 0.002) and lower concentrations of provitamin A carotenoids--α-carotene (P = 0.006), β-carotene (P < 0.001), and β-cryptoxanthin (P < 0.001)--than women. There were no significant differences between the sexes with respect to nonprovitamin A carotenoids (lutein, zeaxanthin, and lycopene) or α-tocopherol. Significant seasonal increments (P < 0.05) in serum concentrations of α-carotene and β-carotene (in summer) and of β-cryptoxanthin (in winter) were detected in both sexes; in males, lutein was higher in summer whereas in females it rose in spring. No sex-related or seasonal variations were observed in a-tocopherol, zeaxanthin, or lycopene. Serum concentrations of provitamin A carotenoids vary according to the individual's sex and season of the year. [ABSTRACT FROM AUTHOR]

Abstract: Consumption of fruits and vegetables is associated with a reduced risk of death from all causes including heart disease and stroke. In this work, the bioavailability of vitamin C from a Mediterranean vegetable soup (gazpacho) constituted mainly of tomato, pepper and cucumber, and its influence on plasma vitamin C, 8-epi-prostaglandin F2α (8-epi-PGF2α), prostaglandin E2 (PGE2), monocyte chemotactic protein-1 (MCP-1), and the cytokines/tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and IL-6 concentrations in a healthy human population were assessed. Six men and six women consumed 500 ml of commercial gazpacho per day for 14 days, corresponding to an intake of 78 mg of ascorbic acid per day. There were no differences (P=.22) in baseline plasma vitamin C concentrations between the men and women. The maximum increase (P<.05) in plasma vitamin C occurred 4 h postdose in both men and women. Vitamin C concentrations were significantly higher (P<.03) on Days 7 and 14 of the intervention. Baseline concentrations of uric acid and 8-epi-PGF2α were significantly higher (P≤.032) in men than in women. Baseline concentrations of 8-epi-PGF2α decreased significantly (P≤.05) by Day 14 of the intervention. A significant inverse correlation was observed between vitamin C and 8-epi-PGF2α (r=−.415, P=.049). Baseline concentrations of PGF2 and MCP-1 were significantly higher (P≤.025) in men than in women but decreased significantly (P≤.05) by Day 14 of the intervention. No effect on TNF-α, IL-1β and IL-6 was observed at Day 14 of the intervention. Drinking gazpacho (500 ml/day) significantly increases plasma concentrations of vitamin C and significantly decreases 8-epi-PGF2α, PGE2 and MCP-1 concentrations in healthy humans. [Copyright &y& Elsevier]

This study assesses the effects of a vitamin E analogue, Trolox, on the oxidative state, endothelial function and morphology in experimental heart transplantation. Heterotopic heart transplantation was carried out in pigs: untreated after 2 and 24 hours of ischemia and treated with Trolox after 24 hours of ischemia. Prolonged preservation of donor hearts was achieved with continuous perfusion and University of Wisconsin solution, in which acid-base balance and enzymes were determined during the procedure. In recipients, hemodynamic and biochemical parameters were determined at baseline and during reperfusion. Trolox diminished the pH of the preservation solution (p<0.01), the left ventricle of the transplanted heart recovered a systolic pressure equaling that of the 2h group and higher than that of the untreated 24h group (p<0.01), the antioxidant levels were not decreased and the glutathione reductase level was maintained throughout the first part of reperfusion. In this group also there was a direct correlation between the concentration of this enzyme and the antioxidant levels (p<0.001). Although the endothelin concentrations increased, the change was less marked in the Trolox group than in the untreated 24h group (p<0.01). Morphologically, mitochondria and myocardial vessels presented a normal structure in the Trolox group, and interstitial edema, inflammatory infiltrate and contraction bands were less prominent than in the untreated group. All these effects indicate that Trolox protected the transplanted heart, at least partially, against ischemia-reperfusion injury.

Increased levels of oxidative stress have been implicated in tissue damage and the development of chronic diseases, and dietary antioxidants may reduce the risk of oxidative tissue damage. As part of a European multicentre project, several studies were undertaken with the aim of testing whether the consumption of foods rich in carotenoids reduces oxidative damage to human tissue components. We describe here the serum response of carotenoids and tocopherols upon supplementation with carotenoids from natural extracts (alpha-carotene+beta-carotene, lutein or lycopene; 15 mg/day) and/or with alpha-tocopherol (100 mg/day) in a multicentre, placebo-controlled intervention study in 400 healthy male and female volunteers, aged 25-45 years, from five European regions (France, Northern Ireland, Republic of Ireland, The Netherlands and Spain). Supplementation with alpha-tocopherol increased serum alpha-tocopherol levels, while producing a marked decrease in serum gamma-tocopherol. Supplementation with alpha- + beta-carotene (carotene-rich palm oil) resulted in 14-fold and 5-fold increases respectively in serum levels of these carotenoids. Supplementation with lutein (from marigold extracts) elevated serum lutein (approx. 5-fold), zeaxanthin (approx. doubled) and ketocarotenoids (although these were not present in the supplement), whereas lycopene supplementation (from tomato paste) resulted in a 2-fold increase in serum lycopene. The isomer distributions of beta-carotene and lycopene in serum remained constant regardless of the isomer composition in the capsules. In Spanish volunteers, additional data showed that the serum response to carotenoid supplementation reached a plateau after 4 weeks, and no significant side effects (except carotenodermia) or changes in biochemical or haematological indices were observed throughout the study. This part of the study describes dose-time responses, isomer distribution, subject variability and side effects during supplementation with the major dietary carotenoids in healthy subjects.