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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Physiol+Renal+Physiol
2014 ; 307
(11
): F1274-82
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gab.com Text
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English Wikipedia
Distinct populations of label-retaining cells in the adult kidney are defined
temporally and exhibit divergent regional distributions
#MMPMID25234315
Rangarajan S
; Sunil B
; Fan C
; Wang PX
; Cutter G
; Sanders PW
; Curtis LM
Am J Physiol Renal Physiol
2014[Dec]; 307
(11
): F1274-82
PMID25234315
show ga
DNA label-retention, or retention of a thymidine analog, is a characteristic of
slow cycling cells and has been used to identify stem cells in several organ
systems. Recent findings have demonstrated inconsistent localization of
label-retaining cells (LRCs) in the kidney. Differences in the dose and timing of
administration of deoxyuridine, the length of the chase period, and the species
of animal used have made understanding the distinctions between these findings
difficult. In the present studies, we utilized a dual loading scheme in the same
animal to demonstrate that the cells labeled at different ages identified
independent populations of LRC that distributed globally in an anti-parallel
manner in the kidney. Loading with a DNA label in neonates identified LRC more
often in the papilla, while administering the DNA label in adult mice identified
LRC prominently in the cortex and the outer medulla. Furthermore, the tissue
compartment distribution (epithelial-endothelial-interstitial) as well as the
specific distribution within the nephron epithelia differed for these
populations. These findings highlighted the complexity of the dynamics of cell
proliferation in the kidney throughout the postnatal and adult period and call
attention to the confusion associated with the term "label-retaining cells" for
different timings of the loading and chase periods. This study indicated that the
results of previous studies should be viewed as nonoverlapping and that further
studies are needed to ascertain the role of each of these populations in the
steady-state maintenance and injury recovery of the kidney.