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Epigenetic Effects Elicited By Lactobacillus GG In Children With Cow's Milk Allergy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02062476
Recruitment Status : Unknown
Verified February 2014 by Roberto Berni Canani, Federico II University.
Recruitment status was:  Recruiting
First Posted : February 13, 2014
Last Update Posted : February 13, 2014
Information provided by (Responsible Party):
Roberto Berni Canani, Federico II University

Brief Summary:

Lactobacillus GG (LGG) is able to exert long lasting effects in children with atopic disorders. We have shown that Nutramigen LGG accelerates tolerance acquisition in infants with cow's milk allergy (CMA). The mechanisms of these effects are still largely undefined. The effect of LGG could be related at least in part by the immunoregulatory role played by LGG. This probiotic can balance the generation of cytokines possibly involved in IgE- or non-IgE-mediated CMA (i.e., IL-4, IL-5, IL-10, IFN-γ , TGF-beta, and TNF-alfa), which can contribute to modulation of inflammatory processes. We have demonstrated that children with IgE-mediated CMA produce significantly higher level of IL-4 and IL-13 in response to cow's milk protein, and that tolerance is associated with a marked reduction of IL-13 production and a concomitant increased frequency of IFN-γ releasing cells.

Epigenetics studies the heritable (and potentially reversible) changes of the genome inherited from one cell generation to the next which alter gene expression but do not involve changes in primary DNA sequences, highlighting the complexity of the inter-relationship between genetics and nutrition. There are three distinct, but closely interacting, epigenetic mechanisms (histone acetylation, DNA methylation, and non-coding microRNAs) that are responsible for modifying the expression of critical genes associated with physiologic and pathologic processes. The profile of epigenetic modifications associated with Th lineage commitment, coupled with the sensitivity of the early developmental period, has led to speculation that factors that disrupt these pathways may increase the risk of allergic diseases. Specifically, effects on DNA methylation and endogenous histone deacetylase inhibitors acting on specific pathways (Th1 and T regulatory cell differentiation) may favour Th2-associated allergic differentiation. MicroRNAs are another structural components of an epigenetic mechanism of post-transcriptional regulation of messenger RNA translation. It has been recently identified a specific Th2-associated miRNA (miR-21) that is critical for the regulation of Th cell polarization.

Condition or disease Intervention/treatment Phase
Cow's Milk Allergy Dietary Supplement: Lactobacillus GG Phase 2

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 20 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Study Start Date : July 2013
Estimated Primary Completion Date : August 2014

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Allergy

Arm Intervention/treatment
Experimental: Treatment with Lactobacillus GG
extensively hydrolyzed casein formula containing LGG
Dietary Supplement: Lactobacillus GG
No Intervention: Children at diagnosis

Primary Outcome Measures :
  1. Change from baseline to 6 months in tolerance acquisition and epigenetic effects in rtwenty children with cow's milk allergy [ Time Frame: Baseline, at least after 6 months of therapy ]
    The investigators will evaluate in children with CMA if the effect of Lactobacillus GG on tolerance acquisition is mediated at least in part by an epigenetic mechanism.

Information from the National Library of Medicine

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Ages Eligible for Study:   4 Months to 48 Months   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Children aged 4 months-4 years with cow's milk allergy

Exclusion Criteria:

  • age higher than 4 years,
  • concomitant chronic systemic diseases,
  • congenital cardiac defects,
  • active tuberculosis,
  • autoimmune diseases,
  • immunodeficiency,
  • chronic inflammatory bowel diseases,
  • celiac disease,
  • cystic fibrosis,
  • metabolic diseases,
  • malignancy,
  • chronic pulmonary diseases,
  • malformations of the gastrointestinal tract,
  • suspected eosinophilic esophagitis or eosinophilic enterocolitis,
  • suspected food-protein-induced enterocolitis syndrome,
  • suspected cow's milk protein-induced anaphylaxis.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02062476

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Contact: Roberto Berni Canani, MD, PhD 0817462680

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University of Naples Federico II Recruiting
Naples, Italy, 80131
Contact: Roberto Berni Canani    0817462680      
Sponsors and Collaborators
Federico II University

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Responsible Party: Roberto Berni Canani, MD, PhD, Federico II University Identifier: NCT02062476     History of Changes
Other Study ID Numbers: 1/14
First Posted: February 13, 2014    Key Record Dates
Last Update Posted: February 13, 2014
Last Verified: February 2014

Additional relevant MeSH terms:
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Milk Hypersensitivity
Immune System Diseases
Food Hypersensitivity
Hypersensitivity, Immediate