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Spatial and temporal patterns of c-kit positive cells in embryonic lungs.
MedLine Citation:
PMID:  21069344     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
BACKGROUND: It has been reported that the smooth muscles in fetal airways exhibit spontaneous phasic contractions throughout gestation. However, the mechanism of these spontaneous contractions is unknown. In the bowel wall, interstitial cells of Cajal (ICCs), which are derived from c-kit positive precursor cells, play an important role as pacemaker cells responsible for the spontaneous, rhythmic activity in the smooth muscle cells. In this study, we investigated the spatial and temporal expression patterns of c-kit positive cells in the embryonic lung and its relationship to the smooth muscle cells surrounding the trachea and the bronchus.
METHODS: Rat fetuses were removed from timed pregnant dams on embryonic days (E) 11.5, 13.5, 15.5, and 17.5. Immunohistochemical studies with anti c-kit antibody and anti α-SMA antibody were carried out using frozen sections.
RESULTS: A small number of c-kit positive cells were observed in the mesenchyme of the lung bud on day E 11.5. They were markedly increased in number on day E 13.5. On day E 15.5 and on day E 17.5, strong c-kit expressions were observed on the vascular wall and moderate expressions in the mesenchyme. C-kit positive cells co-localized with α-SMA positive smooth muscle cells surrounding the airway epithelium.
CONCLUSION: Co-localization of c-kit positive cells and airway smooth muscles in the fetal lung suggests that c-kit positive cells may play an important role in the spontaneous contractions of fetal airways. C-kit expressions in the fetal pulmonary vascular wall suggest that these cells may play an important role in vasculogenesis and angiogenesis of the embryonic lung.
Authors:
Toko Shinkai; Masato Shinkai; Martina A Pirker; Sandra Montedonico; Prem Puri
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pediatric surgery international     Volume:  27     ISSN:  1437-9813     ISO Abbreviation:  Pediatr. Surg. Int.     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-01-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8609169     Medline TA:  Pediatr Surg Int     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  181-5     Citation Subset:  IM    
Affiliation:
National Children's Research Centre, Our Lady's Children's Hospital, University College of Dublin, Crumlin, Dublin 12, Ireland.
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