Food allergies may trigger childhood nephrotic syndrome. Cow
Area of Science:
Pediatric Nephrology
Clinical Immunology
Allergy and Immunology
Background:
Idiopathic nephrotic syndrome (INS) is a significant kidney disorder in children.
The etiology of INS is often unclear, but immune system dysregulation is implicated.
Dietary factors are increasingly being explored as potential triggers for chronic conditions.
Purpose of the Study:
To investigate the potential role of cow's whole milk hypersensitivity in pediatric idiopathic nephrotic syndrome.
To determine if dietary challenges with cow's milk can elicit nephrotic syndrome relapse.
To explore immunological markers associated with milk challenge in these patients.
Main Methods:
Six patients with INS were placed on an elemental diet until proteinuria resolved.
Patients underwent a cow's milk challenge, and clinical and biochemical parameters were monitored.
Intradermal skin testing with cow's milk extract was performed on all participants.
Main Results:
Four out of six patients experienced relapse of proteinuria, edema, and decreased urine output after cow's milk challenge.
Serum IgG concentrations decreased in four patients post-challenge.
All six patients showed acute alterations in plasma C3 complement component and positive skin tests to cow's milk.
Conclusions:
Cow's milk hypersensitivity may be a contributing factor to the clinical and biochemical manifestations of idiopathic nephrotic syndrome in some children.
Food allergies should be considered in the differential diagnosis and management of recurrent or persistent nephrotic syndrome.
Further research is warranted to elucidate the mechanisms linking food hypersensitivity and nephrotic syndrome.