Cheng Xiangyun,Yang Guangming,Duan Zhaoxia,et al.Renal impairment and ferroptosis of renal tubular epithelial cells due to severe blast injuries[J].Journal of Chongqing Medical University,2025,50(7):963-968.
Cheng Xiangyun,Yang Guangming,Duan Zhaoxia,et al.Renal impairment and ferroptosis of renal tubular epithelial cells due to severe blast injuries[J].Journal of Chongqing Medical University,2025,50(7):963-968. DOI: 10.13406/j.cnki.cyxb.003638.
Renal impairment and ferroptosis of renal tubular epithelial cells due to severe blast injuries
实验山羊布置于距离8 kg TNT当量的爆炸物中心3 m处可致重度爆炸伤冲击伤,引起缺氧、肾功能损伤及肾小管上皮细胞铁死亡的发生。
Abstract
Objective
2
To investigate renal impairment and ferroptosis due to severe blast injuries and related mechanism.
Methods
2
The goats were placed 3 meters away from the center of an 8 kg TNT-equivalent explosive to carry out blast injury experiments. The physical parameters of blast waves were measured,and the pathological severity of blast injuries was graded and scored to assess the severity of injuries. Vital signs,blood gas parameters,and renal function markers were measured before injury and at 1,3,6,and 24 hours after injury. Renal tissue samples were collected at 24 hours after injury to prepare tissue sections,which were used to perform HE staining and measure the changes in the content of Fe
2+
and the expression of the ferroptosis-related marker proteins xCT and GPX4 in renal tissue,and Prussian blue staining was performed for renal tissue sections to investigate the mechanism associated with renal impairment and ferroptosis of renal cells.
Results
2
Severe blast injuries accounted for the highest proportion of 47.2% in experimental goats,while mild,moderate,severe,and extremely severe injuries accounted for 2.8%,36.1%,47.2%,and 13.9%,respectively,and the pathologic severity score of blast injury was 2.56±0.15. For the goats after blast injury,there were significant increases in heart rate(
F
=12.750,
P
<
0.01) and respiratory rate(
F
=6.500,
P
<
0.01) and significant reductions in anal temperature(
F
=3.496,
P
<
0.05),partial pressure of blood oxygen(
F
=24.630,
P
<
0.01),and blood oxygen saturation(
F
=18.560,
P
<
0.01),as well as significant increases in the levels of blood uric acid(
F
=22.320,
P
<
0.01),serum creatinine(
F
=15.350,
P
<
0.01),and blood urea nitrogen(
F
=22.310,
P
<
0.01). Compared with the control group,swelling of renal tubular epithelial cells and narrowing of tubular lumen were observed at 24 hours after blast injury,with a significant increase in the content of Fe
2+
in renal tissue(
t
=5.933,
P
<
0.01),significant reductions in the relative expression protein levels of GPX4(
t
=7.924,
P
<
0.01) and xCT(
t
=4.483,
P
<
0.01) in renal tissue,and deposition of a large amount of iron ions in renal tubular epithelial cells.
Conclusion
2
Experimental goats placed 3 meters away from the center of an 8 kg TNT-equivalent explosive can cause severe blast injuries,resulting in the onset of hypoxia,renal impairment,and ferroptosis of renal tubular epithelial cells.
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