title: Comparative study of two models of combined pulmonary fibrosis and emphysema in mice.
abstract: Combined pulmonary fibrosis and emphysema (CPFE) is an "umbrella term" encompassing emphysema and pulmonary fibrosis, but its pathogenesis is not known. We established two models of CPFE in mice using tracheal instillation with bleomycin (BLM) or murine gammaherpesvirus 68 (MHV-68). Experimental mice were divided randomly into four groups: A (normal control, n=6), B (emphysema, n=6), C (emphysema+MHV-68, n=24), D (emphysema+BLM, n=6). Group C was subdivided into four groups: C1 (sacrificed on day 367, 7 days after tracheal instillation of MHV-68); C2 (day 374; 14days); C3 (day 381; 21days); C4 (day 388; 28days). Conspicuous emphysema and interstitial fibrosis were observed in BLM and MHV-68 CPFE mouse models. However, BLM induced diffuse pulmonary interstitial fibrosis with severely diffuse pulmonary inflammation; MHV-68 induced relatively modest inflammation and fibrosis, and the inflammation and fibrosis were not diffuse, but instead around bronchioles. Inflammation and fibrosis were detectable in the day-7 subgroup and reached a peak in the day-28 subgroup in the emphysema + MHV-68 group. Levels of macrophage chemoattractant protein-1, macrophage inflammatory protein-1α, interleukin-13, and transforming growth factor-β1 in bronchoalveolar lavage fluid were increased significantly in both models. Percentage of apoptotic type-2 lung epithelial cells was significantly higher; however, all four types of cytokine and number of macrophages were significantly lower in the emphysema+MHV-68 group compared with the emphysema +BLM group. The different changes in pathology between BLM and MHV-68 mice models demonstrated different pathology subtypes of CPFE: macrophage infiltration and apoptosis of type-II lung epithelial cells increased with increasing pathology score for pulmonary fibrosis.
authors.affiliation: Department of Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
authors.forename: Wan-Guang
authors.initials: WG
authors.lastname: Zhang
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China.
authors.forename: Si-Si
authors.initials: SS
authors.lastname: Wu
authors.affiliation: Department of Respiratory Medicine, Jingzhou Hospital of Tongji Medical College, Huazhong University of Science and Technology, Jingzhou, Hubei, China.
authors.forename: Li
authors.initials: L
authors.lastname: He
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China.
authors.forename: Qun
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China.
authors.forename: Yi-Kuan
authors.initials: YK
authors.lastname: Feng
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China.
authors.forename: Yue-Tao
authors.initials: YT
authors.lastname: Chen
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China.
authors.forename: Guo-Hua
authors.initials: GH
authors.lastname: Zhen
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China.
authors.forename: Yong-Jian
authors.initials: YJ
authors.lastname: Xu
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China.
authors.forename: Zhen-Xiang
authors.initials: ZX
authors.lastname: Zhang
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China.
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Zhao
authors.affiliation: Department of Respiratory and Critical Care Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095, Jie Fang Road, Han Kou District, Wu Han City, HuBei Province 430030, China. Electronic address: huilanz_76@163.com.
authors.forename: Hui-Lan
authors.initials: HL
authors.lastname: Zhang
mesh_terms: D000818:Animals; D017209:Apoptosis; D004195:Disease Models, Animal; D004646:Emphysema / Q000473:pathology*; D004797:Enzyme-Linked Immunosorbent Assay; D005455:Fluorescent Antibody Technique; D007249:Inflammation; D008168:Lung / Q000473:pathology; D051379:Mice; D011658:Pulmonary Fibrosis / Q000473:pathology*; D060888:Real-Time Polymerase Chain Reaction
keywords: Combined pulmonary fibrosis and emphysema; MHV-68; Mice model