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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Radiation-induced strain differences in mouse alveolar inflammatory cell apoptosis.
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Radiation-induced strain differences in mouse alveolar inflammatory cell apoptosis.

机译:辐射引起的小鼠肺泡炎性细胞凋亡的应变差异。

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摘要

Whole-thorax irradiation results in the development of the diffuse inflammatory response alveolitis in C3H/HeJ (C3H) mice and a milder alveolitis with fibrosis in C57BL/6J (B6) mice. In this study, we investigate if this mouse strain difference in response to radiation is due to differences in lung inflammatory cell apoptosis. Mice of the C3H and B6 strains were given a radiation dose of 18 Gy to the thorax and the animals were sacrificed at 11 or 18 weeks following exposure or when they were moribund. Active caspase-3 staining was used to identify apoptotic cells in the alveolar space of histological lung sections from the mice. The apoptotic index of B6 mice was greater than that of C3H mice at 11 weeks postirradiation (17.8% of airspace cells vs. 7.8%, p = 0.028) and in mice sacrificed because of illness (27.3% vs. 14.4%, p = 0.036). No C3H mice survived to the later time point. The inflammatory cells undergoing apoptosis in the mouse lungs were morphologically consistent with alveolar macrophages. We conclude that a difference in inflammatory cell apoptosis may contribute to the disparate pulmonary radiation response of these mouse strains.
机译:全胸照射导致C3H / HeJ(C3H)小鼠发生弥漫性炎症反应性肺泡炎,并导致C57BL / 6J(B6)小鼠出现纤维化的轻度肺泡炎。在这项研究中,我们调查了这种小鼠品系对辐射的差异是否是由于肺炎性细胞凋亡的差异引起的。给C3H和B6株的小鼠的胸腔放射剂量为18 Gy,在暴露后11或18周或垂死时将其处死。活性caspase-3染色用于鉴定小鼠组织学肺切片的肺泡空间中的凋亡细胞。照射后11周,B6小鼠的凋亡指数高于C3H小鼠(17.8%的空域细胞对7.8%,p = 0.028)和因疾病而处死的小鼠(27.3%对14.4%,p = 0.036)。 )。没有C3H小鼠存活到后来的时间点。在小鼠肺中经历凋亡的炎性细胞在形态上与肺泡巨噬细胞一致。我们得出结论,炎性细胞凋亡的差异可能有助于这些小鼠品系的不同的肺辐射反应。

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