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Innate and specific gut-associated immunity and microbial interference.

Vinod Singh1, Kiran Singh, Sarika Amdekar

  • 1Department of Microbiology, Barkatullah University, Bhopal, MP, India. vsingh3@rediffmail.com

FEMS Immunology and Medical Microbiology
|December 17, 2008
PubMed
Summary

Probiotic bacteria break down milk casein into peptides, altering immune responses in infants with milk allergies. This process modifies potentially harmful antigens, impacting cytokine production and immune cell activity.

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Area of Science:

  • Microbiology
  • Immunology
  • Gastroenterology

Background:

  • Gut microbial communities process food antigens and influence immune responses.
  • Bacterial proteases degrade milk casein, producing peptides that can trigger immune reactions.
  • Atopic infants with milk allergies exhibit altered immune responses to food antigens.

Purpose of the Study:

  • To investigate the immunomodulatory effects of microbial interference in infants with milk allergies.
  • To determine if casein degraded by probiotic enzymes can modulate cytokine production and peripheral blood mononuclear cells.
  • To explore the potential of probiotics in managing cow or synthetic milk allergies.

Main Methods:

  • Analyzing cytokine production (e.g., interleukin-4) in peripheral blood mononuclear cells.
  • Assessing the impact of casein, both hydrolyzed and unhydrolyzed, on immune cells.
  • Utilizing bacterial-derived enzymes for casein degradation.

Main Results:

  • Unhydrolyzed casein reduced the production of interleukin-4, indicating an immunomodulatory effect.
  • Probiotic modification of casein alters the structure of potentially harmful antigens.
  • These modifications impact the immunogenicity and immune response of milk antigens.

Conclusions:

  • Probiotic bacteria can modulate immune responses in infants with milk allergies by altering casein structure.
  • Microbial interference plays a role in managing immune responses to food antigens in the gut.
  • Further research into probiotic-derived enzymes may offer therapeutic strategies for milk allergies.