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In vivo Measurement of the Mouse Pulmonary Endothelial Surface Layer

In vivo Measurement of the Mouse Pulmonary Endothelial Surface Layer

Published on: February 22, 2013

Endothelial dysfunction correlates with decompression bubbles in rats.

Kun Zhang¹, Dong Wang², Zhongxin Jiang¹

¹Department of Diving and Hyperbaric Medicine, Faculty of Naval Medicine, the Second Military Medical University, Shanghai, China.

Scientific Reports

|September 13, 2016

Summary

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Rapid decompression in rats caused endothelial dysfunction, linked to bubble formation. The amount of bubbles, not just the rate, is crucial for assessing decompression stress and potential endothelial damage.

Area of Science:

Physiology
Barotrauma Research
Vascular Biology

Background:

Decompression can cause endothelial dysfunction, but results are inconsistent.
The role of bubble formation and decompression rate needs clarification.

Purpose of the Study:

To investigate the relationship between endothelial dysfunction, bubble formation, and decompression rate.
To identify potential biomarkers for decompression stress.

Main Methods:

Rats underwent simulated air dives with varying decompression rates.
Ultrasonic detection of bubbles post-decompression.
Measurement of endothelial markers (ET-1, 6-keto-PGF1α, ICAM-1, VCAM-1, MDA, NO) and lung injury.
Assessment of endothelial-dependent vasodilation in pulmonary artery rings.

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Main Results:

Bubbles formed only in rapid-decompressed rats, correlating with decompression rate.
Rapid decompression increased ET-1, 6-keto-PGF1α, ICAM-1, VCAM-1, MDA, and lung injury markers, while decreasing NO.
Reduced endothelial-dependent vasodilation was observed in rapid-decompressed rats.
Most changes correlated significantly with bubble amounts.

Conclusions:

Bubble formation appears to be the primary cause of decompression-induced endothelial damage.
The quantity of bubbles is clinically significant for evaluating decompression stress.
Serum ET-1 and MDA may serve as sensitive biomarkers for endothelial dysfunction and decompression stress.