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Immune system stimulation by probiotics

G Perdigon1, S Alvarez, M Rachid

  • 1Centro de Referencias para Lactobacilos (CERELA), Tucumán, Argentina.

Journal of Dairy Science
|July 1, 1995
PubMed
Summary
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Lactic acid bacteria, like Lactobacillus casei, can enhance immune responses, particularly secretory IgA, and offer protection against infections and tumors. However, potential side effects like bacteria translocation warrant further investigation.

Area of Science:

  • Immunology and Microbiology
  • Gastroenterology

Background:

  • The immune system comprises organs and cells, orchestrating cellular and humoral responses to antigens.
  • Secretory IgA mediates oral immune responses, while cytokines and adhesion molecules modulate cellular interactions.
  • Evaluating immune status involves assessing T/B cells, cytokines, antibody levels, and cellular functions like phagocytosis.

Purpose of the Study:

  • To describe the effects of lactic acid bacteria on systemic and secretory immune responses.
  • To explore the potential health benefits of lactic acid bacteria, including protection against infections and tumors.

Main Methods:

  • Review of existing literature on lactic acid bacteria and immune system modulation.
  • Analysis of studies investigating Lactobacillus casei and yogurt's impact on immune parameters.

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Main Results:

  • Lactobacillus casei demonstrated efficacy in preventing enteric infections and boosting secretory IgA in malnourished models.
  • Yogurt consumption was linked to inhibited intestinal carcinoma growth via enhanced IgA, T cell, and macrophage activity.
  • A potential risk of bacteria translocation was observed with Lactobacillus casei administration.

Conclusions:

  • Lactic acid bacteria show promise as immunomodulators, offering protection against enteric infections and potentially aiding in tumor prevention.
  • The study highlights the dual role of lactic acid bacteria, with benefits in immune stimulation and potential risks needing consideration.
  • Further research is needed to fully elucidate the mechanisms and optimize the use of lactic acid bacteria in health and disease.