PMID- 21637372 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20110714 LR - 20211020 IS - 2090-1844 (Electronic) IS - 2090-1836 (Print) IS - 2090-1844 (Linking) VI - 2011 DP - 2011 TI - Gradual increase of high mobility group protein b1 in the lungs after the onset of acute exacerbation of idiopathic pulmonary fibrosis. PG - 916486 LID - 10.1155/2011/916486 [doi] LID - 916486 AB - The pathogenesis of acute exacerbation of idiopathic pulmonary fibrosis (IPF) remains to be elucidated. To evaluate the roles of inflammatory mediators in acute exacerbation, the concentrations of high mobility group protein B1 (HMGB1), a chief mediator of acute lung injury, and 18 inflammatory cytokines were measured in the bronchoalveolar lavage fluid, serially sampled from seven IPF patients after the onset of acute exacerbation. HMGB1 gradually increased in the alveolar fluid after the onset of acute exacerbation, in positive correlation with monocytes chemotactic protein-1 (MCP-1), a potent fibrogenic mediator. In the lung tissues of eight IPF patients autopsied after acute exacerbation, intense cytoplasmic staining for HMGB1 was observed in the alveolar epithelial cells in alveolar capillary augmented lesions, where the capillary endothelial cells remarkably reduced the expression of thrombomodulin, an intrinsic antagonist of HMGB1. These results suggest pathogenic roles for HMGB1 and MCP-1 in the late phase of acute exacerbation of IPF. FAU - Ebina, Masahito AU - Ebina M AD - Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo, Aoba-ku, Sendai 980-8574, Japan. FAU - Taniguchi, Hiroyuki AU - Taniguchi H FAU - Miyasho, Taku AU - Miyasho T FAU - Yamada, Shingo AU - Yamada S FAU - Shibata, Naoko AU - Shibata N FAU - Ohta, Hiromitsu AU - Ohta H FAU - Hisata, Shu AU - Hisata S FAU - Ohkouchi, Shinya AU - Ohkouchi S FAU - Tamada, Tsutomu AU - Tamada T FAU - Nishimura, Hidekazu AU - Nishimura H FAU - Ishizaka, Akitoshi AU - Ishizaka A FAU - Maruyama, Ikuro AU - Maruyama I FAU - Okada, Yoshinori AU - Okada Y FAU - Takashi, Kondo AU - Takashi K FAU - Nukiwa, Toshihiro AU - Nukiwa T LA - eng PT - Journal Article DEP - 20110221 PL - Egypt TA - Pulm Med JT - Pulmonary medicine JID - 101558762 PMC - PMC3100576 EDAT- 2011/06/04 06:00 MHDA- 2011/06/04 06:01 PMCR- 2011/02/21 CRDT- 2011/06/04 06:00 PHST- 2010/08/14 00:00 [received] PHST- 2010/12/27 00:00 [revised] PHST- 2010/12/29 00:00 [accepted] PHST- 2011/06/04 06:00 [entrez] PHST- 2011/06/04 06:00 [pubmed] PHST- 2011/06/04 06:01 [medline] PHST- 2011/02/21 00:00 [pmc-release] AID - 10.1155/2011/916486 [doi] PST - ppublish SO - Pulm Med. 2011;2011:916486. doi: 10.1155/2011/916486. Epub 2011 Feb 21.