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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 J+Cell+Mol+Med
2011 ; 15
(5
): 1200-9
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gab.com Text
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English Wikipedia
Peritoneal repairing cells: a type of bone marrow derived progenitor cells
involved in mesothelial regeneration
#MMPMID20477904
Carmona R
; Cano E
; Grueso E
; Ruiz-Villalba A
; Bera TK
; Gaztambide J
; Segovia JC
; Muñoz-Chápuli R
J Cell Mol Med
2011[May]; 15
(5
): 1200-9
PMID20477904
show ga
The peritoneal mesothelium exhibits a high regenerative ability. Peritoneal
regeneration is concomitant with the appearance, in the coelomic cavity, of a
free-floating population of cells whose origin and functions are still under
discussion. We have isolated and characterized this cell population and we have
studied the process of mesothelial regeneration through flow cytometry and
confocal microscopy in a murine model lethally irradiated and reconstituted with
GFP-expressing bone marrow cells. In unoperated control mice, most free cells
positive for mesothelin, a mesothelial marker, are green fluorescent protein
(GFP). However, 24 hrs after peritoneal damage, free mesothelin(+)/GFP(+) cells
appear in peritoneal lavages. Cultured lavage peritoneal cells show
colocalization of GFP with mesothelial (mesothelin, cytokeratin) and fibroblastic
markers. Immunohistochemical staining of the peritoneal wall also revealed
colocalization of GFP with mesothelial markers and with procollagen-1 and smooth
muscle ?-actin. This was observed in the injured area as well as in the
surrounding not-injured peritoneal surfaces. These cells, which we herein call
peritoneal repairing cells (PRC), are very abundant 1 week after surgery covering
both the damaged peritoneal wall and the surrounding uninjured area. However,
they become very scarce 1 month later, when the mesothelium has completely
healed. We suggest that PRC constitute a type of monocyte-derived cells, closely
related with the tissue-repairing cells known as 'fibrocytes' and specifically
involved in peritoneal reparation. Thus, our results constitute a synthesis of
the different scenarios hitherto proposed about peritoneal regeneration,
particularly recruitment of circulating progenitor cells and adhesion of
free-floating coelomic cells.