A microbiome-directed therapeutic food for children recovering from severe acute malnutrition

Area of Science:

• Nutritional science and immunology
• Microbiome research
• Pediatric health

Background:

• Severe acute malnutrition (SAM) affects 14 million children under 5, with standard treatments often resulting in incomplete recovery.
• Children treated for SAM frequently transition to moderate acute malnutrition (MAM), indicating a need for more effective interventions.
• Understanding the interplay between nutrition, the microbiome, and host physiology is crucial for improving recovery outcomes.

Purpose of the Study:

• To evaluate the efficacy of a microbiome-directed complementary food (MDCF-2) compared to standard ready-to-use supplementary food (RUSF) in Bangladeshi children recovering from SAM.
• To investigate the impact of the intervention on plasma proteomic profiles and their association with anthropometric recovery.
• To explore the role of the gut microbiome, including specific bacterial strains, in mediating the effects of nutritional intervention.

Main Methods:

• A randomized controlled trial (RCT) involving 12- to 18-month-old Bangladeshi children treated for SAM.
• Intervention groups received either MDCF-2 or RUSF for 3 months post-hospitalization.
• Plasma protein levels and fecal microbiome composition were analyzed, alongside anthropometric measurements (weight-for-length z-score, WLZ).

Main Results:

• MDCF-2 treatment led to a significantly greater rate of WLZ improvement compared to RUSF (P = 8.73 × 10^-3).
• Meta-analysis revealed 215 plasma proteins positively associated with WLZ, primarily related to musculoskeletal and CNS development, and 44 negatively associated proteins linked to immune activation.
• MDCF-2 significantly enriched the positively associated proteins (q = 1.1 × 10^-6), and specific *Prevotella copri* strains were identified as key players in the microbiome's response to MDCF-2.

Conclusions:

• MDCF-2 demonstrates superior efficacy in promoting anthropometric recovery in children with SAM compared to standard interventions.
• The intervention modulates plasma protein profiles, suggesting a link between nutrition, the microbiome, and host development.
• Further research is warranted to confirm MDCF efficacy broadly and to identify biomarkers for treatment response.