Effect of Bifidobacterium Breve Supplementation on the Onset and Progression of Idiopathic Scoliosis: A Prospective, Single-Blind, Randomized Controlled Trial

Idiopathic scoliosis (IS) is a common pediatric disorder characterized by a spinal curvature exceeding 10 degrees that develops in the absence of obvious congenital or physiological defects. IS is highly prevalent during adolescence, afflicting 3-4% of children worldwide, yet the underlying causes remain poorly understood. Recent studies have indicated that children with idiopathic scoliosis have a disrupted gut microbiota, but there is currently no clinical data on the impact of any probiotic supplementation on scoliosis. Our unpublished data show that the abundance of probiotics such as Bifidobacterium breve in the intestines of children with idiopathic scoliosis is reduced, while the levels of multiple bile acids in the blood are elevated. Therefore, we hypothesize that Bifidobacterium breve supplementation can reduce the progression rate of idiopathic scoliosis in children and may have a potential role in preventing the onset of new cases of scoliosis in children.

This study is a single-blind, randomized controlled trial to investigate the effect of Bifidobacterium breve on the magnitude of idiopathic spinal curves. Eligible scoliosis children will be randomly assigned to one of two groups. The intervention group will receive oral supplementation of Bifidobacterium breve at 4.5x106 CFU daily for 6 months, along with a standardized gut microbiota-related health course for lifestyle correction (such as adjusting diet, moderate exercise, and reducing antibiotic abuse). The intervention group will be subject to regular phone follow-ups to inquire about probiotic intake and be encouraged to adhere to the regimen. The control group will receive the same health course but no probiotic supplementation, serving as an active control to account for the impact of lifestyle improvements. For all scoliosis children, routine follow-up visits will be scheduled every 6 months for at least 24 months to assess curve progression. Additionally, children who have not yet reached the scoliosis threshold at baseline will also be invited and randomly assigned to the same grouping scheme or simply followed up as observational subjects. All participating children, as part of a provincial health program in Zhejiang Province, will undergo annual scoliosis screening and clinical assessment.