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eISSN: 1643-3750

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Different Responses to Identical Trauma Between BALB/C and C57BL/6 Mice

Xiuying Chen, Chang Cheng, Wenchao Cheng, Yuhan Wang, Xuzheng Zuo, Weiju Tang, Zhanyang Yu, Zhihuan Yang, Zhengguo Wang, Peifang Zhu, Wen Huang

(Department of Neurology, Second Affiliated Hospital of Army Medical University, Chongqing, China (mainland))

Med Sci Monit 2021; 27:e928676

DOI: 10.12659/MSM.928676


BACKGROUND: Different responses to identical trauma may be related to the genetic background of individuals, but the molecular mechanism is unclear. In this study we investigated the heterogeneity of trauma in mice and the potential biological explanations for the differences.
MATERIAL AND METHODS: Compared with other organs, the pathological response of the lung after injury is the earliest and most serious. We used C57BL/6 and BALB/C mice to explore the genetic background of different responses to trauma in the lung. We measured mortality rate, pulmonary microvascular permeability, and Cxcl15 gene expression in BALB/C and C57BL/6 mice before and after blast-wave injury. Microvascular permeability was measured using a fluorescent tracer, and Cxcl15 gene expression level and expression distribution were measured using fluorogenic probe quantitative polymerase chain reaction and northern blot.
RESULTS: C57BL/6 mice showed lower mortality rates and pulmonary microvascular permeability than BALB/C mice after blast-wave injury; there was no significant difference in the permeability before blast-wave injury. The Cxcl15 gene was expressed specifically in the lung tissue of mice. The level of Cxcl15 expression in BALB/C mice was higher than in C57BL/6 mice before and after injury, and the variation trend of Cxcl15 expression level after injury was significantly different between BALB/C and C57BL/6 mice.
CONCLUSIONS: Our results indicated that BALB/C and C57BL/6 mice had significant heterogeneity in posttraumatic response in terms of mortality and degree of lung damage. The differences in genetic factors such as Cxcl15 may have played a role in this heterogeneity.

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