Dynamic changes of neutrophil extracellular traps(NETs)release and microcirculatory disorders associated with high altitude pulmonary edema after high altitude hypoxia exposure
10.12092/j.issn.1009-2501.2025.06.002
- VernacularTitle:高海拔低氧暴露后中性粒细胞胞外诱捕网释放与高原肺水肿相关微循环障碍的动态变化研究
- Author:
Hong SU
1
;
Qian CHENG
1
;
Yaxuan WANG
1
;
Chongyang DAI
1
;
Fubang ZHAO
1
;
Xiaoyan PU
1
Author Information
1. 青海大学医学院基础医学部,西宁 810016,青海
- Publication Type:Journal Article
- Keywords:
neutrophil extracellular trap;
high al-titude hypoxia;
pulmonary edema;
microcirculatory disorder;
inflammation
- From:
Chinese Journal of Clinical Pharmacology and Therapeutics
2025;30(6):732-740
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To compare the formation and release of neutrophil extracellular traps(NETs)af-ter exposure to the high-altitude hypoxic environ-ment for different periods,and their relationship with the dynamic changes of microcirculatory disor-ders associated with pulmonary edema.METH-ODS:SD rats were raised under normoxic condi-tions at an altitude of 400 m and under hypoxic conditions at an altitude of 4 200 m.The rats raised under hypoxic conditions at an altitude of 4 200 m for 7 days were returned to normoxic con-ditions at 400 m to observe the changes in physio-logical and pathological indicators of the rats.The dynamic changes of neutrophil extracellular traps(NETs)release and microcirculatory disorders relat-ed to pulmonary edema after high-altitude hypoxia exposure and after returning to the plain were ex-plored by blood routine determination,rat arterial blood gas analysis,ELISA experiment,lung water content determination,H&E staining,and immuno-histochemical staining.RESULTS:In the hypoxic en-vironment at 4 200 m,rats exhibited significant re-ductions in arterial oxygen saturation(SaO2)and partial pressure of oxygen(PO2)(P＜0.01),accompa-nied by a marked increase in lung-tissue water con-tent(P＜0.01).The complete blood count revealed elevated levels of red blood cells,white blood cells,lymphocytes,and neutrophils(P＜0.01).In addition,the formation and release of NETs in neutrophils in-creased,accompanied by an aggravation of the in-flammatory response.After returning to the low-al-titude normoxic area at 400 m,the above indica-tors gradually returned to normal levels on the 7th day.Pathological changes such as alveolar epitheli-al cell shedding and inflammatory cell infiltration were observed in the lung tissues of rats in the high-altitude area,and the pathological changes were restored after returning to the low-altitude normoxic environment.CONCLUSION:The release of NETs from neutrophils is closely related to the re-covery of pulmonary edema and pulmonary ede-ma-related microcirculatory disorders after high-al-titude hypoxia exposure.
