Abstract:
PURPOSE:To determine the contribution of intra-alveolar cells as opposed to cells fixed in the interstitium in the development of radiation-induced lung injury. MATERIALS AND METHODS:C3H/HeN mice were irradiated to the thorax with various doses of radiation. The cellular composition and cytokine production were assessed in the two sites by histological staining and RNase protection assay. RESULTS:Following thoracic irradiation, there was an initial decrease in the number of bronchial alveolar lavage (BAL) cells that was followed after 2 months by a dose-dependent increase up to 4 months. Foamy Mac-1 positive macrophages were present early in the BAL populations, which also expressed the pro-inflammatory cytokines TNF-alpha, IL-1alpha and IL-1beta, but this response subsided by the time of onset of pneumonitis (3 months). In contrast, in whole lung tissue there was a steady increase in Mac-1 positive cells and increased expression of TNF-alpha, IL-1alpha and IL-1beta mRNAs to maximum levels at 3-4 months. CONCLUSIONS:These data indicate distinct temporal and spatial changes in pro-inflammatory cytokine gene expression in different cellular compartments of the irradiated lung. BAL cells became inflammatory early on, but interstitial cells became involved later and were probably more involved in contributing to the pneumonitis.
journal_name
Int J Radiat Bioljournal_title
International journal of radiation biologyauthors
Hong JH,Jung SM,Tsao TC,Wu CJ,Lee CY,Chen FH,Hsu CH,McBride WH,Chiang CSdoi
10.1080/0955300031000076894subject
Has Abstractpub_date
2003-03-01 00:00:00pages
159-67issue
3eissn
0955-3002issn
1362-3095pii
5EUKT9PHKMLTAM7Bjournal_volume
79pub_type
杂志文章abstract:PURPOSE:This review is a contribution to the memory of Dr William (Bill) Morgan and highlights an area of research and deliberation that he considered extremely important in support of the setting of protective radiation dose limits. Biological research has generally played a minor role in the estimation of adverse hea...
journal_title:International journal of radiation biology
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