PlGF/Flt-1/MMP-1 axis in gingival carcinoma bone invasion
Phuong Thao Nguyen1,2, Mutsumi Miyauchi2, Ajiravudh Subarnbhesaj2,3
1Department of Molecular Oral Pathology and Oncology, Graduate School of Medical and Dental Science, Kagoshima University, Japan. ntpthao@dent.kagoshima-u.ac.jp.
Histology and Histopathology
|April 14, 2025
Summary
Placental growth factor (PlGF) drives gingival squamous cell carcinoma bone invasion by promoting osteoclast formation via RANKL and MMP-1. Targeting PlGF may inhibit this aggressive cancer progression.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Gingival squamous cell carcinoma (SCC) commonly invades adjacent bone, increasing patient morbidity and mortality.
- Understanding the molecular drivers of bone invasion is critical for developing effective targeted therapies.
- Placental growth factor (PlGF) is investigated for its role in this process, particularly its interactions with RANKL and MMP-1.
Purpose of the Study:
- To elucidate the role of PlGF in gingival SCC bone invasion.
- To investigate the molecular mechanisms linking PlGF, RANKL, and MMP-1 in bone metastasis.
- To assess the potential of PlGF as a therapeutic target.
Main Methods:
- Analysis of 55 patient samples of gingival SCC.
- In vitro assays, including bone-cell co-culture systems.
- Investigation of molecular pathways involving PlGF, RANKL, and MMP-1 expression.
Main Results:
- Gingival SCC-secreted PlGF promotes bone invasion directly via RANKL induction and indirectly via MMP-1 signaling.
- PlGF upregulates RANKL and MMP-1, stimulating tumor cell migration and osteoclastogenesis (p<0.05).
- High PlGF expression in gingival SCC correlates significantly with bone invasion and MMP-1/Flt-1 expression.
Conclusions:
- PlGF is a key regulator of osteoclastogenesis in gingival SCC.
- PlGF mediates bone invasion through direct and MMP-1-dependent pathways.
- Targeting PlGF activity presents a potential therapeutic strategy against gingival SCC bone metastasis.
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