Related Experiment Video
Updated: Aug 1, 2025

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
SH3BP1 Regulates Melanoma Progression Through Race1/Wace2 Signaling Pathway
Ting Sun1, Wenxian Tong2, Jie Pu3
1Department of Dermatology, Middle Military Command General Hospital of PLA, Wuhan, China.
Background:
SH3-domain binding protein-1 (SH3BP1), which specifically inactivates Rac1 and its target protein Wave2, has been shown to be an important regulator of cancer metastasis. However, the effects of SH3BP1 in melanoma progression remain unclear. The current study aimed to explore the function of SH3BP1 in melanoma and its possible molecular mechanism.
Methods:
TCGA database was used to analyze the expression of SH3BP1 in melanoma. Then, reverse transcription-quantitative polymerase chain reaction was performed to detect the expression of SH3BP1 in melanoma tissues and cells. Next, genes related to SH3BP1 were analyzed by LinkedOmics database, and protein interactions were analyzed by STRING database. These genes were further subjected to Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analysis. In addition, the signaling pathway of SH3BP1 action was screened by bioinformatics analysis. Finally, the function of SH3BP1 and its mediated signaling pathway in melanoma progression were investigated in vitro and in vivo.
Results:
SH3BP1 was significantly upregulated in melanoma tissues and cells. The pathways regulated by SH3BP1 are closely related to the occurrence and development of tumors. And we found that overexpression of SH3BP1 promoted the proliferation, migration, and invasion of melanoma cells by increasing Rac1 activity and Wave2 protein levels in vitro. Similarly, overexpression of SH3BP1 facilitated melanoma progression by upregulating Wave2 protein expression in vivo.
Conclusion:
In summary, this study revealed for the first time that SH3BP1 promoted melanoma progression through Rac1/Wave2 signaling pathway, providing a new therapeutic target for melanoma.
Insights
SH3-domain binding protein-1 (SH3BP1) promotes melanoma progression by activating the Rac1/Wave2 pathway. This study identifies SH3BP1 as a potential therapeutic target for melanoma treatment.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- SH3-domain binding protein-1 (SH3BP1) regulates cancer metastasis by inactivating Rac1 and Wave2.
- The role of SH3BP1 in melanoma progression is not well understood.
Purpose of the Study:
- To investigate the function of SH3BP1 in melanoma.
- To elucidate the molecular mechanisms underlying SH3BP1's role in melanoma.
Main Methods:
- Analysis of SH3BP1 expression in melanoma using TCGA and RT-qPCR.
- Bioinformatic analysis (LinkedOmics, STRING, GO, KEGG) to identify related genes and pathways.
- In vitro and in vivo experiments to assess SH3BP1 function in melanoma progression.
Main Results:
- SH3BP1 is significantly upregulated in melanoma tissues and cells.
- Overexpression of SH3BP1 promotes melanoma cell proliferation, migration, and invasion.
- SH3BP1 enhances melanoma progression in vivo by upregulating Wave2 protein expression, mediated by increased Rac1 activity.
Conclusions:
- SH3BP1 promotes melanoma progression via the Rac1/Wave2 signaling pathway.
- SH3BP1 represents a novel therapeutic target for melanoma.
Related Concept Videos
Abnormal Proliferation
The JAK-STAT Signaling Pathway
Interactions Between Signaling Pathways
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Hedgehog Signaling Pathway
The Retinoblastoma Gene
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
MAPK Signaling Cascades

