title: Effects of hyperoxia on transdifferentiation of primary cultured typeII alveolar epithelial cells from premature rats.
abstract: Hyperoxia exposure is a significant risk factor for the impaired alveolarization characteristic of bronchopulmonary dysplasia. Type II alveolar epithelial cells (AECIIs) may serve as "alveolar stem cells" to transdifferentiate into type I alveolar epithelial cells (AECIs). Here, we show that hyperoxia is capable of inducing transdifferentiation of AECIIs in premature rats in vitro. Hyperoxia-induced transdifferentiation was characterized by typical morphological changes, inhibition of cellular proliferation, decline in expression rate of Ki67, accumulation of cells in the G(1) phase of the cell cycle, increased expression of AECI-specific protein aquaporin 5, and decreased expression of AECII-associated protein surfactant protein C. These results suggest that hyperoxia may induce transdifferentiation of AECIIs into AECIs and the transdifferentiation may be responsible for repairing early lung injury.
authors.affiliation: Department of Pediatrics, the Affiliated Hospital of Jiangsu University, Zhenjiang, China. lhy5154@163.com
authors.forename: Hong-Yan
authors.initials: HY
authors.lastname: Lu
authors.forename: Gen-Bao
authors.initials: GB
authors.lastname: Shao
authors.forename: Wen-Bin
authors.initials: WB
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D051402:Aquaporin 5 / Q000378:metabolism; D002453:Cell Cycle / Q000502:physiology; D002470:Cell Survival / Q000502:physiology; D054338:Cell Transdifferentiation / Q000502:physiology*; D017931:DNA Primers / Q000235:genetics; D005333:Fetus / Q000166:cytology; D005434:Flow Cytometry; D018496:Hyperoxia / Q000503:physiopathology*; D019394:Ki-67 Antigen / Q000378:metabolism; D010455:Peptides / Q000378:metabolism; D011650:Pulmonary Alveoli / Q000166:cytology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D020545:Respiratory Mucosa / Q000502:physiology*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: C496040:Aqp5 protein, rat; D051402:Aquaporin 5; D017931:DNA Primers; D019394:Ki-67 Antigen; D010455:Peptides; C077063:Sftpc protein, rat