IMMUNOPHENOTYPICAL CHARACTERISTICS OF CELLULAR COMPOSITION IN BREAST MILK.

Area of Science:

• Cell Biology
• Immunology
• Stem Cell Research

Background:

• Human colostrum is a rich source of bioactive molecules and cells.
• Adherent cells in colostrum have potential therapeutic applications but require detailed characterization.

Purpose of the Study:

• To investigate the morphology and immunophenotype of adherent cells from female colostrum in vitro.
• To identify potential cell lineages and differentiation capabilities within these adherent cells.

Main Methods:

• Short-term in vitro culture (6-7 days) of colostrum adherent cells.
• Immunophenotyping using a panel of antibodies including CD3, CD31, CD34, CD45, CD68, vimentin, and osteocalcin.

Main Results:

• Adherent cells exhibited varied morphology, with fibroblast-like and rounded cell populations observed.
• Cells expressed CD68, vimentin, and osteocalcin, with minimal expression of CD3, CD31, CD34, and CD45.
• A significant portion of cells displayed an immunophenotype consistent with monocyte-macrophage lineage and stromal cell markers.

Conclusions:

• Colostrum adherent cells include a monocyte-macrophage component and a distinct fraction expressing stromal antigens.
• The presence of vimentin and osteocalcin suggests a potential osteoblast differentiation capacity from mesenchymal stem cells in colostrum.
• These findings highlight the complex cellular composition of colostrum and its potential for regenerative medicine.