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Updated: Aug 26, 2025

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Exosomal miR-328 originated from pulmonary adenocarcinoma cells enhances osteoclastogenesis via downregulating Nrp-2
Chengcheng Zhang1,2, Jingru Qin1, Lu Yang1
1Department of Medical Oncology, Longhua Hospital affiliated with Shanghai University of Traditional Chinese Medicine, 725 Wanpingnan Road, Shanghai, 200032, China.
Abstract:
Osseous metastases of pulmonary carcinoma and the detailed mechanisms remain unclear, and the effects of exosomes (Exos) originated from pulmonary adenocarcinoma cells in this process have received a lot of attentions. Our study revealed that the Exos secreted from A549 cells (A549-Exos) enhanced osteoclastogenesis and osseous resorption in vitro. In addition, A549-Exos showed a targeted effect on bones to enhance osseous resorption in vivo. A549-exosomal miR-328 enhanced osseous resorption via downregulating neuropilin 2 (Nrp-2) expression, and A549-Exos miR-328 inhibitors suppressed osseous resorption in vivo. Therefore, A549-exosomal miR-328 enhances osteoclastogenesis via downregulating Nrp-2 expression, thus A549-Exos miR-328 inhibitors can be used as a potential nanodrug for treating osseous metastases.
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