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Updated: Jul 9, 2026

Isolation of Leukocytes from Human Breast Milk for Use in an Antibody-dependent Cellular Phagocytosis Assay of HIV Targets
Published on: September 6, 2019
The immune system in human milk and the developing infant
1Department of Pediatrics, The University of Texas Medical Branch, Galveston, Texas 77555-0369, USA. agoldman@utmb.edu
Human milk contains an immune system that protects infants from infections and diseases. This complex system, including leukocytes, offers crucial developmental support and highlights human milk
Area of Science:
- Immunology
- Human Lactation
- Infant Nutrition
Background:
- The concept of immune factors in human milk developed from historical observations.
- The discovery of leukocytes in human milk in 1970 solidified the understanding of its immune properties.
Purpose of the Study:
- To trace the historical development of the concept of the immune system in human milk.
- To highlight the protective roles of human milk's immune components against infant diseases.
- To emphasize the evolutionary significance of these components for infant development.
Main Methods:
- Historical review of clinical and laboratory observations.
- Analysis of the evolution of scientific understanding regarding human milk's immune properties.
Main Results:
- Human milk contains antimicrobial, anti-inflammatory, and immunoregulatory agents.
- These components compensate for immature infant immune systems, defending against infections and diseases like necrotizing enterocolitis and Crohn's disease.
- Evidence supports the superiority of human milk for infant nutrition due to its immune functions.
Conclusions:
- The immune system in human milk is a critical evolutionary adaptation for infant health.
- Human milk provides essential protection against common infant infectious diseases and immune-mediated disorders.
- Further research is anticipated to uncover additional components and functions of the human milk immune system.
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