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NCT06652698
Cow's milk allergy (CMA) is a common food allergy in infants and young children that can have a significant impact on the individual and their family due to dietary restrictions, risk of nutritional deficiencies, social limitations, and decreased quality of life. It also represents a financial burden for families and healthcare resources. There is an ongoing debate about the significance of early exposure to cow's milk proteins within hours or days after birth and its relationship to the risk of developing CMA later in life. Current recommendations for early introduction of cow's milk proteins in infants who cannot be breastfed vary and are inconsistent due to a lack of clear evidence. This knowledge gap underscores the need for further research to provide a definitive understanding of the relationship between early exposure to cow's milk proteins and the development of CMA, which will ultimately inform evidence-based prevention strategies to improve the health and well-being of affected individuals and their families. This trial aims to investigate whether early supplementation with various nutritional interventions (cow's milk formula \[CMF\], amino acids formula \[AAF\], donor human milk \[DHM\], or high-pressure processed "pascalized" donor human milk \[DHM-P\]) could serve as an effective strategy for the primary prevention of CMA in breastfed neonates. This study is an open-label randomized, controlled, head-to-head trial with four parallel arms and allocation 1:1:1:1.
NCT06456541
This is a multi-center, randomized, double-blinded, placebo-controlled food challenge to be conducted in infants and children with confirmed IgE-mediated cow's milk allergy (CMA), followed by a 7-day open feeding of the experimental formula.
NCT02405923
This is a multicenter, controlled, randomized, prospective, non-inferiority, double blind intervention trial to evaluate the children growth (at 6, 9 and 12 months) using a rice hydrolysed protein formula compared to an extensively cow's milk protein hydrolysed formula for the management of Cow's Milk Protein Allergy (CMPA).
NCT02466035
Lactobacillus GG (LGG) is able to exert long lasting effects in children with atopic disorders. Nutramigen LGG accelerates tolerance acquisition in infants with cow's milk allergy. 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 cow's milk allergy Interleulkin (IL)-4, IL-5, IL-10, IFN-γ , TGF-β, and TNF-Υ), which can contribute to modulation of inflammatory processes. The investigators 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 microRNA (miR-21) that is critical for the regulation of Th cell polarization. It has been previously demonstrated an inverse DNA methylation pattern of cytokines involved in Th2 response (IL-4, IL-5) compared with cytokines involved in Th1 response (IL-10, INF- y) in children with CMA acquiring oral tolerance, with the most pronounced effects in those treated with Nutramigen LGG. The current study will prospectively evaluate the effect of Nutramigen LGG and other commercially available hypoallergenic formulas on epigenetic mechanisms that may be related to tolerance acquisition.
NCT02779881
Epigenetic mechanisms have been implicated in the pathogenesis of food allergy. The investigators previously demonstrated that tolerance acquisition in children with Immunoglobulin E- (IgE) mediated cow's milk allergy (CMA) is driven by epigenetic modulation of the Th1 and Th2 cytokine genes. A regulatory T cell (Treg) suppressive phenotype, characterized by stable expression of the transcription factor "Forkhead box Protein 3" (FoxP3), plays a pivotal role in food tolerance. FoxP3 mRNA expression is lower in children with atopic asthma or IgE-mediated food allergy than in healthy children. FoxP3 stable expression requires full CpG demethylation of its transcriptional regulatory regions, and, moreover, hypermethylation of the FoxP3 gene has been associated with reduced Treg function and allergy. DNA methylation is a biologically and chemically stable epigenetic modification that locks in long-term gene expression patterns. The demethylation status of FoxP3 at a highly conserved region within the Treg-specific-demethylated-region (TSDR), a CpG-rich, located on the 2nd conserved non-coding sequence of FoxP3 (CNS2), is restricted to Tregs. Transcriptional activity of the TSDR is essentially determined by its methylation status : it is completely inactive in its methylated state, but when the TSDR is demethylated, transcription factors such as Ets-1 and Creb can bind to the TSDR. TSDR demethylated and open chromatin conformation in the Foxp3 locus leads to stable phenotype differentiated Foxp3+ Treg. FoxP3 TSDR demethylation in peripheral blood mononuclear cells (PBMCs) has been associated with reduced atopic sensitization and asthma in children. Epigenetic regulation of antigen-induced T-cell subsets may predict a state of immune tolerance in food allergy. Indeed, DNA methylation of the FoxP3 gene in Tregs decreased during oral tolerance acquisition in patients with peanut allergy undergoing oral immunotherapy. The aim of this study was to evaluate further the epigenetic regulation of FoxP3 gene in children with IgE-mediated CMA.
NCT02379598
Cow's milk allergy is an immunologically mediated adverse reaction to milk proteins. In industrialized countries there is an incidence of 2-3% in children younger than 2 years. Cow's milk allergy may present with different clinical pictures and symptoms often nonspecific. Among the most common are certainly food refusal and failure to thrive until frameworks frank malnutrition. It was also noted that the cow's milk allergy can have a negative impact on the quality of life of the patient and his family. The treatment of this condition provides the setting of a diet that is free of the allergen to the base of the adverse reaction. There are some types of formulas for the treatment of this condition. The formulas based on amino acids are currently used in all cases non-responsive to treatment with the above formulas or in all those characterized by severe allergic reactions. Being made from amino acids such formulas are by definition non-allergenic. They have also proven to ensure a rapid resolution of symptoms favoring a resumption of growth, nutritional status, as well as lead to a rapid improvement in the quality of life of the patient and his family. However, the studies currently available to us concerning the effects of nutritional formulas based on amino acids affect short observation periods (usually less than 6 months) and were directed to a comparison only with hydrolysates of whey protein or casein and not with healthy subjects. To date thus lack consistent data on the nutritional effects in the medium to long term.
NCT01584245
This clinical trial will evaluate the efficacy of an amino acid formula in infants with allergic manifestations.
NCT02081651
Cow's milk allergy is the most common food allergy in children. The scenery clinical and epidemiological of cow's milk allergy is significantly changed in the last decade. The severity of the clinical manifestations is still rising, and now cow's milk allergy has become the leading cause of hospitalization for food -induced anaphylaxis in our country. In addition, the overall prevalence of cow's milk allergy is increasing for a gradual reduction in the ability to acquire immunological tolerance to cow's milk protein in the first years of life. These mutations dictate the need to identify strategies to stimulate the acquisition of immunological tolerance in children affected by cow's milk allergy . The mechanisms of acquired immunological tolerance are not yet fully defined . The current view suggests the existence of a dynamic mechanism , consisting of various cellular compartments , which is set in a crucial environmental factors arising mainly from the diet and its effects on the intestinal microbiota. These acquisitions have contributed to the definition of a new concept in the field of human nutrition: immunonutrition. The immunonutrition is the ability, through the intake of specific nutrients on the immune system to interfere directly or indirectly through modulation of the composition and function of the intestinal microbiota. The proponent group has recently shown that it is possible to stimulate a more rapid acquisition of immunological tolerance in children affected by CMA through the administration of extensively hydrolysed casein containing the probiotic Lactobacillus rhamnosus GG (LGG) (Berni Canani et al. J Pediatr 2013) . Several lines of evidence suggest that this effect is induced by a combination of direct immunomodulatory action exerted by some small peptides derived from the beta - casein and the action of lactobacillus GG. It 's well known that the Lactobacillus GG is able to adjust the composition and functions of the microbiota in the child with CMA and directly adjust some immunological mechanisms involved in the pathogenesis of this condition. At the same time other groups have demonstrated the possibility that a high percentage of patients with IgE-mediated CMA is able to tolerate foods containing hydrolyzed cow's milk proteins with different processes. It has also been speculated that these strategies can facilitate the acquisition of immune tolerance in patients with cow's milk allergy. One of these foods is Parmigiano -Reggiano cheese, which is characterized by an ' extensive hydrolysis of the proteins in cow's milk , which degrade the caseins present and generate large amounts of peptides and free amino acids and by the presence of appreciable quantities of Lactobacillus GG in the samples to maturing higher . In a recent study it was shown that 58% of patients suffering from IgE-mediated CMA is able to tolerate a daily intake of normal amounts of this food , especially in the absence of a sensibilization to IgE specific to the beta lactoglobulin. These new findings allow us to hypothesize the use of Parmigiano REggiano cheese as a possible strategy immunonutrition can stimulate the acquisition of immune tolerance in patients with CMA .
NCT01622426
The investigators aim to assess the tolerance to a new commercially available Aaf in children affected by IgE- or non-IgE-mediated CMA.
NCT00298376
This study aims to determine if there is a link between cow's milk allergy in infants and regulatory T cells dysfunction that should be transient in infant acquiring oral tolerance after 12 month avoiding food and persistent in others. Cow's milk allergy is evaluated by basophils activation test, T cells activation test, specific humoral response (IgA, IgE, IgG) in allergic infants before and after 12 month avoiding food, before and after low dose milk exposure, before and after oral challenge. Number and function of regulatory T cells and microflora composition are measured at the same time. Allergic infants are compared to age matched control group.