Milking the niche: Microbial control of neonatal hematopoiesis.

Osteopontin in maternal milk influences the neonatal microbiome to promote dendritic cell development and protect against severe respiratory infection.

• Why it matters: Understanding how early-life nutrition impacts immune development can reveal strategies to prevent long-term disease susceptibility.
• What they did: Howard et al. examined the role of milk glycoprotein osteopontin in shaping the neonatal microbiome and its effects on hematopoiesis, focusing on dendritic cell development and infection protection.
• The result: Findings suggest a maternal milk-microbiota pathway that links early nutrition to immune system maturation, potentially informing interventions to reduce disease risk later in life.