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A placebo-controlled blinded trial to determine the potential of a prebiotic to reduce immune and physical frailty
Secondary Supervisor(s): Professor Joao Pedro Magalhaes
University of Registration: University of Birmingham
Project Outline
Advancing age is accompanied by profound physiological changes, including remodelling of the immune system (immunosenescence), decline in physical function (frailty), and disruption of gut microbial communities (dysbiosis). Our preliminary data reveal a causal link between microbial dysbiosis, reduced dietary fibre intake, and intestinal barrier dysfunction in driving thymic involution and T-cell ageing. Restoration of microbiome homeostasis has already shown anti-immunosenescence benefits in older Clostridioides difficile patients, underscoring the therapeutic potential of microbiome-targeted interventions. Recent evidence suggests that age-associated T-cell alterations are closely linked to frailty, a relationship also observed in frail hip-fracture patients. Together, these findings establish a strong rationale for this translational project, which will test whether prebiotic nutraceutical therapies can combat T-cell ageing and inflammaging, while improving resilience and quality of life in older adults.
The objectives are:
1. Evaluate the efficacy of 12-week prebiotic supplementation in reducing inflammaging and T-cell ageing in healthy and frail older cohorts.
2. Determine impact on physical function and skeletal muscle ageing, key drivers of independence and frailty risk.
3. Integrate multi-omics data using machine learning to uncover novel interactions within the immune–muscle–gut axis.
Gut microbiota dysregulation lies at the core of many ageing-related changes, including immune dysfunction, sarcopenia, and vulnerability to infection. Modulating the microbiome through targeted dietary strategies offers a practical, scalable, and low-cost approach with direct relevance to older populations. If successful, this work could deliver a nutritional intervention to extend healthy lifespan, delay frailty, and reduce healthcare burden, providing both biological insights and a clear pathway to translation into clinical and community settings.