Sema4D Expression and Secretion Are Increased by HIF-1α and Inhibit Osteogenesis in Bone Metastases of Lung Cancer
Overview
Authors
Affiliations
Most lung cancer bone metastasis are characterized by osteolytic destruction and osteoblastic activity is significantly decreased, suggesting that hypoxia may play a critical role in the process, but the underlying mechanisms remain unknown. Semaphorin 4D (Sema4D) is a recently discovered osteogenic inhibitory factor that is expressed at high levels in lung cancers. Here, CoCl-induced hypoxia significantly enhanced the inhibitory effect of lung cancer cell conditioned media on osteoblast differentiation by inducing the expression and secretion of Sema4D in a HIF-1α- but not HIF-2α-dependent manner. Moreover, HIF-1α directly regulated Sema4D expression by binding to bases 1171 to 798 in the Sema4D promoter. Furthermore, hypoxia increased Sema4D secretion by upregulating a disintegrin and metalloproteinase 17 (ADAM17) expression in lung cancer in a HIF-1α-dependent manner. In bone metastasis samples from 49 patients with lung cancer, Sema4D and ADAM17 expression significantly correlated with HIF-1α expression and strongly correlated with a poor differentiation status and osteolytic bone destruction. These results provide the first evidence that HIF-1α-induced Sema4D expression and secretion play important roles in lung cancer osteolytic bone metastasis by inhibiting osteoblast differentiation, thereby providing potential strategies for the treatment of bone metastasis via targeting osteoblasts.
Skeletal interoception and prospective application in biomaterials for bone regeneration.
Bai L, Li J, Li G, Zhou D, Su J, Liu C Bone Res. 2025; 13(1):1.
PMID: 39743568 PMC: 11693760. DOI: 10.1038/s41413-024-00378-w.
Xuan Z, Zhang Y, Li D, Wang K, Huang P, Shi J J Cell Mol Med. 2024; 28(20):e70142.
PMID: 39443302 PMC: 11499074. DOI: 10.1111/jcmm.70142.
Dong H, Tang F, Zhao Z, Huang W, Wan X, Hong Z Pharmaceuticals (Basel). 2024; 17(6).
PMID: 38931373 PMC: 11206986. DOI: 10.3390/ph17060706.
The emerging role of the semaphorin family in cartilage and osteoarthritis.
Peng W, Chen Q, Zheng F, Xu L, Fang X, Wu Z Histochem Cell Biol. 2024; 162(3):187-202.
PMID: 38849589 DOI: 10.1007/s00418-024-02303-y.
Li J, Wu J, Xie Y, Yu X Front Oncol. 2024; 14:1360471.
PMID: 38571500 PMC: 10987778. DOI: 10.3389/fonc.2024.1360471.