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Updated: Jun 16, 2025

A Proximal Culture Method to Study Paracrine Signaling Between Cells
Published on: August 28, 2018
Cancer cell-derived exosomes promote NSCLC progression via the miR-199b-5p/HIF1AN axis
Bangzhu Liu1, Yan Rui2, Miao Li3
1Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250000, China; The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, China; Department of Respiratory Medicine, Wuhu Hospital, East China Normal University (The People's Second Hospital of Wuhu), Wuhu, Anhui, 241000, China.
Background:
Exosomes are mediators of intercellular communication. Cancer cell-secreted exosomes allow exosome donor cells to promote cancer growth, as well as metastasis.
Methods:
Here, exosomes were isolated from the serum of non-small cell lung cancer (NSCLC) patients and characterized by transmission electron microscopy (TEM), nanoparticle tracking analysis (NTA) and western blot analysis. NSCLC cell proliferation and migration were assessed using CCK-8, 5-ethynyl-2'-deoxyuridine (EdU) and Transwell assays. H1299 tumor formation and pulmonary metastasis were examined in a xenograft model in nude mice.
Results:
We found that exosomes derived from NSCLC (NSCLC-Exos) promoted NSCLC cell migration and proliferation, and that NSCLC-Exo-mediated malignant progression of NSCLC was mediated by miR-199b-5p. Inhibition of miR-199b-5p decreased the effects of NSCLC-Exos on NSCLC malignant progression. HIF1AN was identified as a downstream target of miR-199b-5p. Furthermore, overexpression of HIF1AN reversed the effects of miR-199b-5p on NSCLC malignant progression.
Conclusion:
In summary, our findings demonstrated that exosomal-specific miR-199b-5p promoted proliferation in distant or neighboring cells via the miR-199b-5p/HIF1AN axis, resulting in enhanced tumor growth.
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