| First Author | Schmiedl A | Year | 2011 |
| Journal | Am J Physiol Lung Cell Mol Physiol | Volume | 301 |
| Issue | 4 | Pages | L490-9 |
| PubMed ID | 21724861 | Mgi Jnum | J:176282 |
| Mgi Id | MGI:5290001 | Doi | 10.1152/ajplung.00131.2010 |
| Citation | Schmiedl A, et al. (2011) Lipopolysaccharide-induced injury is more pronounced in fetal transgenic ErbB4-deleted lungs. Am J Physiol Lung Cell Mol Physiol 301(4):L490-9 |
| abstractText | Pulmonary ErbB4 deletion leads to a delay in fetal lung development, alveolar simplification, and lung function disturbances in adult mice. We generated a model of intrauterine infection in ErbB4 transgenic mice to study the additive effects of antenatal LPS administration and ErbB4 deletion during fetal lung development. Pregnant mice were treated intra-amniotically with an LPS dose of 4 mug at E17 of gestation. Lungs were analyzed 24 h later. A significant influx of inflammatory cells was seen in all LPS-treated lungs. In heterozygote control lungs, LPS treatment resulted in a delay of lung morphogenesis characterized by a significant increase in the fraction of mesenchyme, a decrease in gas exchange area, and disorganization of elastic fibers. Surfactant protein (Sftp)b and Sftpc were upregulated, but mRNA of Sftpb and Sftpc was downregulated compared with non-LPS-treated controls. The mRNA of Sftpa1 and Sftpd was upregulated. In ErbB4-deleted lungs, the LPS effects were more pronounced, resulting in a further delay in morphological development, a more pronounced inflammation in the parenchyma, and a significant higher increase in all Sftp. The effect on Sftpb and Sftpc mRNA was somewhat different, resulting in a significant increase. These results imply a major role of ErbB4 in LPS-induced signaling in structural and functional lung development. |
