Skrevet av Emne: Periodisk faste og proinflammatoriske cytokiner  (Lest 7318 ganger)

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Ett vs tre måltider om dagen i to måneder, stort sett identisk matinntak.

Gruppen som spiste ett måltid om dagen (periodisk faste) produserte mindre proinflammatoriske cytokiner (mindre av disse er en bra ting).



Background
Intermittent fasting (IF) improves healthy lifespan in animals by a mechanism involving reduced oxidative damage and increased resistance to stress. However, no studies have evaluated the impact of controlled meal frequency on immune responses in human subjects.

Objective
A study was conducted to establish the effects of controlled diets with different meal frequencies, but similar daily energy intakes, on cytokine production in healthy male and female subjects.

Design
In a crossover study design with an intervening washout period, healthy normal weight middle-age male and female subjects (n=15) were maintained for 2 months on controlled on-site one meal per day (OMD) or three meals per day (TMD) isocaloric diets. Serum samples and peripheral blood mononuclear cells (PBMCs) culture supernatants from subjects were analyzed for the presence of inflammatory markers using a multiplex assay.

Results
There were no significant differences in the inflammatory markers in the serum of subjects on the OMD or TMD diets. There was an increase in the capacity of PBMCs to produce cytokines in subjects during the first month on the OMD or TMD diets. Lower levels of TNF-alpha, IL-17, MCP-1 and MIP-1beta were produced by PBMCs from subjects on the OMD versus TMD diet.

Conclusions
PBMCs of subjects on controlled diets exhibit hypersensitivities to cellular stimulation suggesting that stress associated with altered eating behavior might affect cytokine production by immune cells upon stimulation. Moreover, stimulated PBMCs derived from healthy individuals on a reduced meal frequency diet respond with a reduced capability to produce cytokines.


http://www.journal-inflammation.com/content/pdf/1476-9255-8-6.pdf


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