| Autor: |
Ryunosuke Nakashima, Shunsuke Kamei, Hirofumi Nohara, Haruka Fujikawa, Kasumi Maruta, Taisei Kawakami, Yuka Eto, Noriki Takahashi, Mary Ann Suico, Toru Takeo, Naomi Nakagata, Hirofumi Kai, Tsuyoshi Shuto |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Journal of Pharmacological Sciences, Vol 140, Iss 2, Pp 113-119 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
1347-8613 |
| DOI: |
10.1016/j.jphs.2019.01.011 |
| Popis: |
Pulmonary emphysema, inflammation and senescence-like phenotype are pathophysiological characteristics of chronic obstructive pulmonary disease (COPD). Recently, a murine model of COPD has been established by inducing airway-specific overexpression of epithelial Na+ channel β subunit (βENaC-Tg mice). However, little is known about the histological and biochemical differences between βENaC-Tg mice and an existing acute emphysematous mouse model (elastase-induced model). Here, we first utilized whole lung image-based quantification method for histological analysis to determine auto-measure parameters, including alveolar area, alveolar perimeter, (major axis + minor axis)/2 and Feret diameter. Even though the extent of emphysema was similar in both models, the coefficient of variation (CV) of all histological parameters was smaller in βENaC-Tg mice, indicating that βENaC-Tg mice show homogeneous emphysema as compared with elastase-induced acute model. Expression analysis of lung tissue RNAs further revealed that elastase-induced model exhibits transient changes of inflammation markers (Kc, Il-6, Lcn2) and senescence-related markers (Sirt1, p21) at emphysema-initiation stage (1 day), which does not last until emphysema-manifestation stage (3 weeks); while the up-regulation is stable at emphysema-manifestation stage in βENaC-Tg mice (14-week old). Thus, these studies demonstrate that βENaC-Tg mice exhibit diffuse-type emphysema with stable expression of inflammatory and senescence-like markers. Keywords: Chronic pulmonary obstructive disease (COPD), Epithelial Na+ channel (ENaC), Emphysema, Auto-measure parameters, Senescence |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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