Exacerbation of bleomycin-induced injury and fibrosis by pneumonectomy in the residual lung of mice

The Journal of Surgical Research
Toru KakizakiKoichi Kobayashi

Abstract

Lung resection after induction chemotherapy and/or radiotherapy for down-staging of locally advanced lung cancer can be complicated with lethal interstitial pneumonia. We studied the effects of pneumonectomy on bleomycin-induced lung injury and fibrosis in mice. The mice underwent left pneumonectomy or a sham thoracotomy after intratracheal administration of saline or bleomycin. Lung permeability index, wet-to-dry weight ratio, histological changes, collagen contents, and concentrations of inflammatory mediators and cell counts in broncho-alveolar lavage (BAL) fluid were assessed in the residual right lung 7 d after surgery. The index of capillary permeability, lung water content, and inflammatory cell counts in BAL fluid were significantly increased by pneumonectomy. These measurements were highest in the mice with both pneumonectomy and intratracheal administration of bleomycin. Similarly, fibrotic change in lung pathology, as well as an increase in lung collagen content, was most prominent in the mice exposed to both interventions. The BAL fluid concentrations of interleukin-1beta, interleukin-6, RANTES, and high mobility group box 1 were significantly increased by pneumonectomy and enhanced by the additional administration ...Continue Reading

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May 18, 2010·Current Opinion in Pulmonary Medicine·Ilias C PapanikolaouVlasis S Polychronopoulos
Mar 1, 2012·Clinics in Chest Medicine·Dong Soon Kim
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