Formation of pancreatic duct epithelium from bone marrow during neonatal development

Stem Cells
Xiuli WangGay M Crooks

Abstract

Recent reports suggest that bone marrow-derived cells engraft and differentiate into pancreatic tissue at very low frequency after pancreatic injury. All such studies have used adult recipients. The aim of our studies was to investigate the potential of bone marrow to contribute to the exocrine and endocrine components of the pancreas during the normal rapid growth of the organ that occurs during the neonatal period. Five to ten million bone marrow cells from adult, male, transgenic, green fluorescent protein (GFP) mice were injected into neonatal nonobese diabetic/severely compromised immunodeficient/beta2microglobulin-null mice 24 hours after birth. Two months after bone marrow transplantation, pancreas tissue was analyzed with fluorescence immunohistochemistry and fluorescence in situ hybridization (FISH). Co-staining of GFP, with anticytokeratin antibody, and with FISH for the presence of donor Y chromosome indicated that up to 40% of ducts (median 4.6%) contained epithelial cells derived from donor bone marrow. In some of these donor-derived ducts, there were clusters of large and small ducts, all comprised of GFP+ epithelium, suggesting that whole branching structures were derived from donor bone marrow. In addition, rare...Continue Reading

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