# Effects of Electromagnetic Pulses on Exosomes Secretion by A549 Cells

**Authors:** Qingxia HOU, Yingmei WANG, Meng CAO, Jiangzheng LIU, Deqin KONG, Qian ZHANG, Weihua YU, Guangzhou AN

PMC · DOI: 10.3779/j.issn.1009-3419.2024.106.34 · Chinese Journal of Lung Cancer · 2024-12-20

## TL;DR

This study investigates how electromagnetic pulses affect the secretion of exosomes and their miRNA content in lung cancer cells.

## Contribution

The study reveals how different EMP parameters alter exosome quantity and miRNA abundance in A549 cells.

## Key findings

- 400 or 800 kV/m EMP reduced exosome secretion, while 600 kV/m increased it.
- EMP altered miRNA abundance in exosomes, affecting potential signaling pathways.
- EMP exposure changed exosome function without altering cell morphology or viability.

## Abstract

大量研究提示电磁脉冲（electromagnetic pulses, EMP）在肿瘤治疗方面具有靶向性强、副作用少和治疗费用低等优点，但其用于肿瘤治疗的最佳参数以及EMP与肿瘤外泌体之间的关系至今仍不清楚。本研究旨在明确不同参数EMP对人非小细胞肺癌A549细胞分泌外泌体数量和内含物微小RNA（microRNA, miRNA）的影响，为EMP临床应用和相关研究提供参考。

将A549细胞随机分为对照组和不同强度EMP辐照组，辐照组细胞分别接受场强为400、600和800 kV/m EMP辐照，EMP脉冲数为2000个，重复频率为20 Hz，脉宽为120 ns，每天辐照1次，连续辐照3 d。辐照结束后，收集并鉴定外泌体，台盼蓝染色检测活细胞数量变化，纳米颗粒追踪分析（nanoparticle tracking analysis, NTA）检测外泌体浓度变化，miRNA测序检测外泌体内miRNA丰度变化。

与对照组相比，EMP辐照组A549细胞的形态和数量未见明显改变，但400或800 kV/m EMP辐照组外泌体数量明显减少（P<0.05），600 kV/m EMP辐照组外泌体数量明显增多（P<0.05）。各个EMP辐照组与对照组相比，外泌体miRNAs的表达丰度明显不同（P<0.05），其差异丰度miRNAs靶基因富集在不同的细胞信号通路。

实验条件下EMP辐照可明显改变A549细胞分泌外泌体的数量和miRNAs的丰度，可进一步影响肿瘤外泌体功能。

## Linked entities

- **Diseases:** lung cancer (MONDO:0005138)

## Full-text entities

- **Diseases:** tumor (MESH:D009369), non-small cell lung cancer (MESH:D002289)
- **Species:** Homo sapiens (human, species) [taxon 9606]
- **Cell lines:** A549 — Homo sapiens (Human), Lung adenocarcinoma, Cancer cell line (CVCL_0023)

## Full text

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## Figures

7 figures with captions in the complete paper: https://tomesphere.com/paper/PMC11839499/full.md

## References

22 references — full list in the complete paper: https://tomesphere.com/paper/PMC11839499/full.md

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Source: https://tomesphere.com/paper/PMC11839499