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Updated: Apr 23, 2026
Colony Formation Assay Detecting the Proliferative Capacity of LncRNA-knockdown Osteosarcoma Cells
Published on: January 16, 2026
Knockdown of TRAF4 expression suppresses osteosarcoma cell growth in vitro and in vivo
Weitao Yao1, Xin Wang1, Qiqing Cai1
1Department of Bone and Soft Tumor, Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, Henan 45000, P.R. China.
Abstract:
Tumor necrosis factor (TNF) receptor-associated factor 4 (TRAF4) is an adapter molecule that is overexpressed in certain cancers. TRAF4 is overexpressed in osteosarcoma tissues and osteosarcoma cells. Using the technique of RNA interference, the expression of TRAF4 in the human osteosarcoma Saos-2 cell line was shown to be downregulated. The proliferation, cell cycle arrest and apoptosis ability of Saos‑2 cells were examined, as was tumor development in a xenograft mouse model. The results showed that the TRAF4 knockdown exerts inhibitory effects on the proliferation ability of Saos-2 cells and tumor development in a xenograft mouse model. Simultaneously, it was found that TRAF4 knockdown led to cell cycle arrest in the G1 phase and promoted Saos-2 cell apoptosis. Following TNF-α treatment, the expression of nuclear factor κB was significantly reduced in the TRAF4‑small interfering RNA group. These results indicate that TRAF4 regulated osteosarcoma cell growth in vitro and in vivo, and offers a candidate molecular target for osteosarcoma prevention and therapy.
Insights
Tumor necrosis factor (TNF) receptor-associated factor 4 (TRAF4) is overexpressed in osteosarcoma. Downregulating TRAF4 inhibits cancer cell growth, promotes apoptosis, and reduces tumor development, suggesting TRAF4 as a therapeutic target.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Tumor necrosis factor (TNF) receptor-associated factor 4 (TRAF4) is an adapter molecule implicated in various cancers.
- TRAF4 overexpression is observed in osteosarcoma tissues and cells, suggesting its potential role in tumorigenesis.
Purpose of the Study:
- To investigate the functional role of TRAF4 in osteosarcoma progression.
- To evaluate the therapeutic potential of targeting TRAF4 in osteosarcoma.
Main Methods:
- Utilized RNA interference to downregulate TRAF4 expression in the human osteosarcoma Saos-2 cell line.
- Assessed cell proliferation, cell cycle progression, apoptosis, and tumor development in a xenograft mouse model.
Main Results:
- TRAF4 knockdown significantly inhibited Saos-2 cell proliferation and tumor growth in vivo.
- Downregulation of TRAF4 induced G1 phase cell cycle arrest and enhanced apoptosis in Saos-2 cells.
- TRAF4 knockdown reduced nuclear factor κB (NF-κB) expression following TNF-α treatment.
Conclusions:
- TRAF4 plays a crucial role in regulating osteosarcoma cell growth both in vitro and in vivo.
- TRAF4 represents a promising molecular target for the prevention and therapy of osteosarcoma.
