crypt cells in duodenum 2.4days: cardiac endothelial cells 2.2weeks: pancreatic duct cells 5 - 6days
||Rat Rattus norvegicus
||Erben RG, Odörfer KI, Siebenhütter M, Weber K, Rohleder S. Histological assessment of cellular half-life in tissues in vivo. Histochem Cell Biol. 2008 Nov130(5):1041-6. doi: 10.1007/s00418-008-0470-3. abstract. Duodenum: p.1043 right column top paragraph. Cardiac cells: p.1044 caption to figure 1.b & p.1045 left column 2nd paragraph. Pancreatic cells p.1045 left column bottom paragraphPubMed ID18618128
||Abstract:"Here, [investigators] show that cellular half-life in tissues can be histologically measured under steady state conditions in vivo by analyzing the loss of 5-bromo-2'-deoxyuridine (BrdU)-labeled cells over time after withdrawal of long-term BrdU labeling. To achieve efficient continuous cell labeling, [they] implanted BrdU-containing subcutaneous slow-release pellets into 12-month-old male Fischer 344 rats, delivering BrdU at a dose of 75 mg/kg per day over 1 (n = 20) or 3 weeks (n = 20). Four to five rats each were killed directly after the labeling or 1, 3, and 7 weeks post-labeling. Cellular half-life after withdrawal of BrdU was analyzed by nonlinear regression analysis of the labeling index, using a model of one-phase exponential decay."
||Abstract:"[Investigators] initially validated [their] technique in the duodenum, where [they] determined a half-life of 2.4 days for crypt cells. Next, [they] applied this method to other tissues, and found a half-life of 2.2 weeks for cardiac endothelial cells, and of 5-6 days for pancreatic duct cells."