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Fatty acids and lymphocyte functions.

P C Calder1, P Yaqoob, F Thies

  • 1Institute of Human Nutrition, University of Southampton, UK. pcc@soton.ac.uk

The British Journal of Nutrition
|March 16, 2002
PubMed
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Dietary fats significantly impact immune cell function, particularly lymphocytes. Long-chain omega-3 fatty acids, like eicosapentaenoic acid found in fish oil, show potential in managing inflammatory diseases such as rheumatoid arthritis and asthma.

Area of Science:

  • Immunology
  • Nutrition Science
  • Molecular Biology

Background:

  • The immune system protects against pathogens but can mistakenly attack host tissues.
  • Lymphocytes play a dual role in both beneficial and detrimental immune responses.
  • Dietary fat intake, including specific fatty acid types, influences lymphocyte function and immune regulation.

Purpose of the Study:

  • To investigate how dietary fatty acids affect lymphocyte functions and immune responses.
  • To explore the role of specific fatty acids, such as omega-3s, in modulating immune cell activity and eicosanoid production.
  • To assess the potential therapeutic benefits of dietary fatty acids, particularly fish oil, in chronic inflammatory conditions.

Main Methods:

  • Analysis of cell culture and animal feeding studies.

Related Experiment Videos

  • Examination of how dietary fatty acid composition alters immune cell fatty acid profiles.
  • Measurement of lymphocyte proliferation, cytokine production, and natural killer cell activity in response to various fatty acids.
  • Review of clinical evidence for fish oil's effects on T-helper 1 responses and inflammatory diseases.

    • Main Results:

    • Dietary fatty acids alter the fatty acid composition of lymphocytes, affecting eicosanoid production (e.g., prostaglandin E2).
    • Specific fatty acids (oleic, linoleic, conjugated linoleic, gamma-linolenic, dihomo-gamma-linolenic, arachidonic, alpha-linolenic, eicosapentaenoic, and docosahexaenoic acids) influence lymphocyte proliferation, cytokine production, and NK cell activity.
    • Long-chain n-3 fatty acids, especially eicosapentaenoic acid (EPA), are potent modulators of lymphocyte function.
    • Fish oil, rich in EPA, appears to down-regulate T-helper 1 responses, showing promise for rheumatoid arthritis and potentially asthma.

    Conclusions:

    • Dietary fat composition critically influences immune cell function and inflammatory responses.
    • Omega-3 fatty acids, particularly EPA from fish oil, demonstrate significant immunomodulatory effects.
    • Fish oil may offer therapeutic benefits for chronic inflammatory diseases like rheumatoid arthritis and asthma, though individual responses can vary.