Kupffer cells originate from which germ layer?

Kupffer cells originate from which germ layer?

• A. Endoderm
• B. Ectoderm
• C. Neural crest
• D. Mesoderm

Answer: (D)

Kupffer cells are liver-resident macrophages, arising from mesoderm-derived hematopoietic progenitors. In early development, macrophages originate in the yolk sac from mesodermal cells, migrate to the fetal liver, and seed it as tissue-resident macrophages that persist into adulthood. The liver’s epithelial components, like hepatocytes and bile ducts, come from endoderm, so endoderm forms the liver tissue itself, while the macrophage population comes from the mesoderm. Neural crest cells, while contributing to some ectoderm-derived lineages, are not the source of Kupffer cells in the liver.

Kupffer cells are liver-resident macrophages, arising from mesoderm-derived hematopoietic progenitors. In early development, macrophages originate in the yolk sac from mesodermal cells, migrate to the fetal liver, and seed it as tissue-resident macrophages that persist into adulthood. The liver’s epithelial components, like hepatocytes and bile ducts, come from endoderm, so endoderm forms the liver tissue itself, while the macrophage population comes from the mesoderm. Neural crest cells, while contributing to some ectoderm-derived lineages, are not the source of Kupffer cells in the liver.