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Dietary fat and asthma: is there a connection?

PN Black, S Sharpe
European Respiratory Journal 1997 10: 6-12; DOI: 10.1183/09031936.97.10010006
PN Black
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S Sharpe
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Abstract

The last two decades have seen an increase in the prevalence of asthma, eczema, and allergic rhinitis in developed countries. This increase has been paralleled by a fall in the consumption of saturated fat and an increase in the amount of polyunsaturated fat in the diet. This is due to a reduction in the consumption of animal fat and an increase in the use of margarine and vegetable oils containing omega-6 polyunsaturated fatty acids (PUFAs), such as linoleic acid. There is also evidence for a decrease in the consumption of oily fish which contain omega-3 PUFAs, such as eicosapentaenoic acid. In a number of countries, there are social class and regional differences in the prevalence of allergic disease, which are associated with differences in the consumption of PUFAs. Linoleic acid is a precursor of arachidonic acid, which can be converted to prostaglandin E2 (PGE2), whereas eicosapentaenoic acid inhibits the formation of PGE2. PGE2 acts on T-lymphocytes to reduce the formation of interferon-gamma (IFN-gamma) without affecting the formation of interleukin-4 (IL-4). This may lead to the development of allergic sensitization, since IL-4 promotes the synthesis of immunoglobulin E (IgE), whereas IFN-gamma has the opposite effect. Changes in the diet may explain the increase in the prevalence of asthma, eczema and allergic rhinitis. The effects of diet may be mediated through an increase in the synthesis of prostaglandin E2 which in turn can promote the formation of immunoglobulin E.

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Dietary fat and asthma: is there a connection?
PN Black, S Sharpe
European Respiratory Journal Jan 1997, 10 (1) 6-12; DOI: 10.1183/09031936.97.10010006

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Dietary fat and asthma: is there a connection?
PN Black, S Sharpe
European Respiratory Journal Jan 1997, 10 (1) 6-12; DOI: 10.1183/09031936.97.10010006
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