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CLC number: R845.2+1

On-line Access: 2020-08-04

Received: 2019-12-12

Revision Accepted: 2020-03-02

Crosschecked: 2020-07-10

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714


Xue-jun Sun


Wen-wu Liu


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Journal of Zhejiang University SCIENCE B 2020 Vol.21 No.8 P.646-656


Lung macrophages are involved in lung injury secondary to repetitive diving

Author(s):  Ke Ning, Zhen-biao Guan, Hong-tao Lu, Ning Zhang, Xue-jun Sun, Wen-wu Liu

Affiliation(s):  Department of Navy Aviation Medicine, Faculty of Naval Medicine, the Naval Military Medical University, Shanghai 200433, China; more

Corresponding email(s):   sunxjk@hotmail.com, liuwenwu1980@hotmail.com

Key Words:  Repetitive diving, Decompression, Lung injury, Bubble, Macrophage, Inflammation

Ke Ning, Zhen-biao Guan, Hong-tao Lu, Ning Zhang, Xue-jun Sun, Wen-wu Liu. Lung macrophages are involved in lung injury secondary to repetitive diving[J]. Journal of Zhejiang University Science B, 2020, 21(8): 646-656.

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author="Ke Ning, Zhen-biao Guan, Hong-tao Lu, Ning Zhang, Xue-jun Sun, Wen-wu Liu",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Lung macrophages are involved in lung injury secondary to repetitive diving
%A Ke Ning
%A Zhen-biao Guan
%A Hong-tao Lu
%A Ning Zhang
%A Xue-jun Sun
%A Wen-wu Liu
%J Journal of Zhejiang University SCIENCE B
%V 21
%N 8
%P 646-656
%@ 1673-1581
%D 2020
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1900687

T1 - Lung macrophages are involved in lung injury secondary to repetitive diving
A1 - Ke Ning
A1 - Zhen-biao Guan
A1 - Hong-tao Lu
A1 - Ning Zhang
A1 - Xue-jun Sun
A1 - Wen-wu Liu
J0 - Journal of Zhejiang University Science B
VL - 21
IS - 8
SP - 646
EP - 656
%@ 1673-1581
Y1 - 2020
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B1900687

This study aimed to establish an animal model of decompression-induced lung injury (DILI) secondary to repetitive diving in mice and explore the role of macrophages in DILI and the protective effects of high-concentration hydrogen (HCH) on DILI. Mice were divided into three groups: control group, DILI group, and HCH group. Mice were exposed to hyperbaric air at 600 kPa for 60 min once daily for consecutive 3 d and then experienced decompression. In HCH group, mice were administered with HCH (66.7% hydrogen and 33.3% oxygen) for 60 min after each hyperbaric exposure. Pulmonary function tests were done 6 h after decompression; the blood was harvested for cell counting; the lung tissues were harvested for the detection of inflammatory cytokines, hematoxylin and eosin (HE) staining, and immunohistochemistry; western blotting and polymerase chain reaction (PCR) were done for the detection of markers for M1 and M2 macrophages. Our results showed that bubbles formed after decompression and repeated hyperbaric exposures significantly reduced the total lung volume and functional residual volume. Moreover, repetitive diving dramatically increased proinflammatory factors and increased the markers of both M1 and M2 macrophages. HCH inhalation improved lung function to a certain extent, and significantly reduced the pro-inflammatory factors. These effects were related to the reduction of M1 macrophages as well as the increase in M2 macrophages. This study indicates that repetitive diving damages lung function and activates lung macrophages, resulting in lung inflammation. HCH inhalation after each diving may be a promising strategy for the prevention of DILI.


目的: 探索反复潜水引起肺损伤的炎症机制以及吸入高浓度氢气(HCH)对这种损伤的治疗作用.
方法:将雄性C57小鼠随机分为对照组、DILI组和HCH组.DILI组于600 kPa压力下暴露60 min,连续3 d.HCH组在减压处理后吸入HCH(66.7% H2+33.3% O2)干预.减压操作6 h后检测小鼠肺功能和小鼠肺干湿比,取小鼠肺组织固定进行苏木精-伊红染色,并取小鼠全血进行血细胞计数实验.取小鼠肺组织提取蛋白并提取血清,采用酶联免疫吸附测定(ELISA)检测炎症因子与趋化因子,并使用蛋白质免疫印迹(western blotting)试验测定小鼠肺内小鼠含生长因子样模体粘液样激素样受体(F4/80)、巨噬细胞甘露糖受体(CD206)和诱导型一氧化氮合酶(iNOS)的表达量.使用免疫组化检测小鼠肺组织切片内F4/80、CD206和iNOS的阳性细胞的比例.提取小鼠肺组织内总信使核糖核酸(mRNA),使用荧光实时定量聚合酶链反应测定极化标记蛋白CD206和iNOS以及炎症因子TNF-αIL-10的基因表达量.


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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[26]List of electronic supplementary materials

[27]Materials and methods

[28]Fig. S1 Micro computed tomography scan for bubbles

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