[Antioxidant and fat intake in patients with polinic asthma].
ABSTRACT The aim of our work was to evaluate the dietary intake of patients with asthma.
A total of 54 subjects with asthma were enrolled (average age 23.59 +/- 9.6 years). In all patients, we determined weight, height and the body mass index and a three days nutritional questionnaire was administered.
The total calories intake was normal. Distribution of calories was: 39.7% carbohydrates, 19.4% proteins and 40.9% lipids. Low intakes of vitamin A, D, E, thiamine and folic acid were detected, and an adequate intake of vitamin K, C, niacin and B12 was observed. The mineral intake showed an increase in calcium and a decrease in magnesium, zinc, iodine and selenium. The intake of polyunsaturated omega-9 fatty acids was 34.8(12.7) g/day, that of polyunsaturated omega-6 fatty acids was 5.7(3.1) g/day, and the intake of polyunsaturated omega-3 fatty acids was 0.85(0.31) g/day. Saturated fats represented a 18.4%. The omega6/omega3 ratio was 6.63.
Asthmatic patients have a low intake of vitamins A and E but an increase in the intake of saturated fatty acids.
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ABSTRACT: Dietary selenium (]Se), mainly through its incorporation into selenoproteins, plays an important role in inflammation and immunity. Adequate levels of Se are important for initiating immunity, but they are also involved in regulating excessive immune responses and chronic inflammation. Evidence has emerged regarding roles for individual selenoproteins in regulating inflammation and immunity, and this has provided important insight into mechanisms by which Se influences these processes. Se deficiency has long been recognized to negatively impact immune cells during activation, differentiation, and proliferation. This is related to increased oxidative stress, but additional functions such as protein folding and calcium flux may also be impaired in immune cells under Se deficient conditions. Supplementing diets with above-adequate levels of Se can also impinge on immune cell function, with some types of inflammation and immunity particularly affected and sexually dimorphic effects of Se levels in some cases. In this comprehensive article, the roles of Se and individual selenoproteins in regulating immune cell signaling and function are discussed. Particular emphasis is given to how Se and selenoproteins are linked to redox signaling, oxidative burst, calcium flux, and the subsequent effector functions of immune cells. Data obtained from cell culture and animal models are reviewed and compared with those involving human physiology and pathophysiology, including the effects of Se levels on inflammatory or immune-related diseases including anti-viral immunity, autoimmunity, sepsis, allergic asthma, and chronic inflammatory disorders. Finally, the benefits and potential adverse effects of intervention with Se supplementation for various inflammatory or immune disorders are discussed.Antioxidants & Redox Signaling 09/2011; 16(7):705-43. · 8.20 Impact Factor
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ABSTRACT: Studies of human asthma and of animal models of allergic airway inflammation revealed a crucial role for Th2 cells in the pathogenesis of allergic asthma. Kruppel-type zinc finger proteins are the largest family of a regulatory transcription factor for cellular development and function. Zinc finger protein (Zfp) 35 is an 18-zinc finger motif-containing Kruppel-type zinc finger protein, while its function remains largely unknown. The aim of this study was to clarify the role of Zfp35 in the pathogenesis of Th2-dependent allergic inflammation, such as allergic asthma. We examined airway eosinophilic inflammation and hyperresponsiveness in two mouse models, which use our newly generated Zfp35-deficient (Zfp35(-/-)) mice and adoptive transfer of cells. In Zfp35(-/-) mice, Th2 cell differentiation, Th2 cytokine production, eosinophilic inflammation, and airway hyperresponsiveness were substantially enhanced. Furthermore, adoptive transfer of Ag-sensitized Zfp35(-/-) CD4 T cells into the asthmatic mice resulted in enhanced airway inflammation and airway hyperresponsiveness. These results indicate that Zfp35 controls Th2 cell differentiation, allergic airway inflammation, and airway hyperresponsiveness in a negative manner. Thus, Zfp35 may control Th2-dependent diseases, such as allergic asthma.The Journal of Immunology 09/2009; 183(8):5388-96. · 5.52 Impact Factor
Article: Selenium and asthma.[show abstract] [hide abstract]
ABSTRACT: Se is a potent nutritional antioxidant important for various aspects of human health. Because asthma has been demonstrated to involve increased oxidative stress, levels of Se intake have been hypothesized to play an important role in the pathogenesis of asthma. However, significant associations between Se status and prevalence or severity of asthma have not been consistently demonstrated in human studies. This highlights both the complex etiology of human asthma and the inherent problems with correlative nutritional studies. In this review, the different findings in human studies are discussed along with results from limited intervention studies. Mouse models of asthma have provided more definitive results suggesting that the benefits of Se supplementation may depend on an individual's initial Se status. This likely involves T helper cell differentiation and the mechanistic studies that have provided important insight into the effects of Se levels on immune cell function are summarized. Importantly, the benefits and adverse effects of Se supplementation must both be considered in using this nutritional supplement for treating asthma. With this in mind new approaches are discussed that may provide more safe and effective means for using Se supplementation for asthma or other disorders involving inflammation or immunity.Molecular Aspects of Medicine 02/2012; 33(1):98-106. · 10.38 Impact Factor