Comprehensive analysis of elastase-induced pulmonary emphysema in mice: effects of ambient existing particulate matters.

Abstract:

:Pulmonary exposure of rodents to porcine pancreatic elastase (PPE) induces lesions that morphologically resemble human panacinar emphysema. However, there has been little work on the comprehensive analysis of this model. The present study was designed to extensively examine the biological effects of PPE on inflammation, cell damage, emphysematous change, and cholinergic reactivity in the lungs of mice. Furthermore, we evaluated the effects of pulmonary exposure to diesel exhaust particles (DEP) on the disease model. Intratracheal administration of PPE induced (1) proinflammatory response in the lungs that was characterized by significant infiltration of leukocytes such as macrophages, eosinophils, and lymphocytes and an increased level of interleukin-1β in lung homogenates, (2) lung cell damage, indicated by higher levels of total protein, lactate dehydrogenase, and alkaline phosphatase in lung homogenates, (3) emphysema-related morphological changes including airspace enlargement and progressive destruction of alveolar wall structures, and (4) airway responsiveness to methacholine in the context of the compliance value of the respiratory system in a dose-dependent manner showing an overall trend. A single intratracheal administration of DEP did not significantly facilitate the hallmark of the disease. This is the first study to extensively analyze PPE-induced lung emphysema in mice with evaluation of the effects of DEP. Furthermore, this bioassay may be applied to future investigations that evaluate new therapeutic agents or risk factors for pulmonary emphysema.

journal_name

Int Immunopharmacol

authors

Inoue K,Koike E,Takano H

doi

10.1016/j.intimp.2010.07.016

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

1380-9

issue

11

eissn

1567-5769

issn

1878-1705

pii

S1567-5769(10)00245-6

journal_volume

10

pub_type

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