Long Noncoding RNA SAMMSON Promotes Melanoma Progression by Inhibiting FOXA2 Expression
Lijuan Yang1,2, Meiling Zhou1,3, Shulei Wang1
1Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Kunming Medical University, Kunming, China.
Stem Cells International
|February 17, 2023
Summary
The long noncoding RNA SAMMSON (survival-associated mitochondrial melanoma-specific oncogenic noncoding RNA) promotes melanoma progression. Lower SAMMSON levels correlate with better patient survival, suggesting it as a therapeutic target.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Long noncoding RNAs (lncRNAs) are implicated in cancer development.
- The lncRNA SAMMSON (survival-associated mitochondrial melanoma-specific oncogenic noncoding RNA) is upregulated in various cancers, but its role in melanoma is unclear.
Purpose of the Study:
- To investigate the expression and functional role of SAMMSON in melanoma.
- To evaluate SAMMSON as a prognostic biomarker and potential therapeutic target in melanoma.
Main Methods:
- Bioinformatics analysis of SAMMSON expression and patient survival.
- In vitro assays (MTT, colony formation, Transwell) to assess cell proliferation, migration, and invasion.
- In vivo mouse xenograft model for tumorigenesis.
- RT-qPCR and western blotting to analyze gene and protein expression (cell cycle factors, EMT markers, MMPs).
- Investigation of the SAMMSON-FOXA2 interaction and the EZH2/H3K27me3 pathway.
Main Results:
- SAMMSON expression is elevated in melanoma tissues and cells.
- Lower SAMMSON expression correlates with improved 10-year overall survival (OS) in melanoma patients.
- SAMMSON knockdown inhibits melanoma cell proliferation, migration, and invasion.
- SAMMSON downregulates Forkhead box protein A2 (FOXA2) via the EZH2/H3K27me3 axis.
Conclusions:
- SAMMSON promotes melanoma progression by regulating proliferation, invasion, and EMT.
- SAMMSON acts as an oncogene in melanoma by downregulating FOXA2.
- SAMMSON is a potential prognostic biomarker and therapeutic target for melanoma.
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