Keratinocyte growth factor can enhance alveolar epithelial repair by nonmitogenic mechanisms
| Autor: | Lorraine B. Ware, Iris F. Ueki, Michael A. Matthay, Masanobu Ishigaki, Thomas Geiser, Kamran Atabai |
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| Rok vydání: | 2002 |
| Předmět: |
Male
Pulmonary and Respiratory Medicine Fibroblast Growth Factor 7 Physiology Mitosis Respiratory Mucosa In Vitro Techniques Lung injury Biology Rats Sprague-Dawley chemistry.chemical_compound Epidermal growth factor Physiology (medical) Cell Adhesion medicine Animals Epidermal growth factor receptor Cells Cultured A549 cell Extracellular Matrix Proteins Wound Healing Cell growth Cell Biology Rats Specific Pathogen-Free Organisms Cell biology ErbB Receptors Fibroblast Growth Factors Pulmonary Alveoli medicine.anatomical_structure chemistry Immunology biology.protein Polystyrenes Keratinocyte growth factor Pulmonary alveolus |
| Zdroj: | American Journal of Physiology-Lung Cellular and Molecular Physiology. 283:L163-L169 |
| ISSN: | 1522-1504 1040-0605 |
| DOI: | 10.1152/ajplung.00396.2001 |
| Popis: | Pretreatment with keratinocyte growth factor (KGF) ameliorates experimentally induced acute lung injury in rats. Although alveolar epithelial type II cell hyperplasia probably contributes, the mechanisms underlying KGF's protective effect remain incompletely described. Therefore, we tested the hypothesis that KGF given to rats in vivo would enhance alveolar epithelial repair in vitro by nonproliferative mechanisms. After intratracheal instillation (48 h) of KGF (5 mg/kg), alveolar epithelial type II cells were isolated for in vitro alveolar epithelial repair studies. KGF-treated cells had markedly increased epithelial repair (96 ± 22%) compared with control cells ( P < 0.001). KGF-treated cells had increased cell spreading and migration at the wound edge but no increase in in vitro proliferation compared with control cells. KGF-treated cells were more adherent to extracellular matrix proteins and polystyrene. Inhibition of the epidermal growth factor (EGF) receptor with tyrosine kinase inhibitors abolished the KGF effect on epithelial repair. In conclusion, in vivo administration of KGF augments the epithelial repair rate of alveolar epithelial cells by altering cell adherence, spreading, and migration and through stimulation of the EGF receptor. |
| Databáze: | OpenAIRE |
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