Related Experiment Video
Updated: Nov 2, 2025

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
FUT8-AS1 Inhibits the Malignancy of Melanoma Through Promoting miR-145-5p Biogenesis and Suppressing NRAS/MAPK
Xiang-Jun Chen1, Sha Liu1, Dong-Mei Han1
1Department of Burns and Plastic Surgery, The 969th Hospital of PLA, Hohhot, China.
Abstract:
Melanoma is the major lethal skin malignancy. However, the critical molecular drivers governing melanoma progression and prognosis are still not clear. By analyzing The Cancer Genome Atlas (TCGA) data, we identified FUT8-AS1 as a prognosis-related long non-coding RNA (lncRNA) in melanoma. We further confirmed that FUT8-AS1 is downregulated in melanoma. Reduced expression of FUT8-AS1 is correlated with aggressive clinical factors and inferior overall survival. Using in vitro functional assays, our findings demonstrated that ectopic expression of FUT8-AS1 represses melanoma cell proliferation, migration, and invasion. FUT8-AS1 silencing promotes melanoma cell proliferation, migration, and invasion. Furthermore, in vivo functional assays demonstrated that FUT8-AS1 represses melanoma growth and metastasis. Mechanistically, FUT8-AS1 was found to bind NF90, repress the interaction between NF90 and primary miR-145 (pri-miR-145), relieve the repressive roles of NF90 on mature miR-145-5p biogenesis, and thus promote miR-145-5p biogenesis and upregulate mature miR-145-5p level. The expression of FUT8-AS1 is positively correlated with miR-145-5p in melanoma tissues. Via upregulating miR-145-5p, FUT8-AS1 reduces the expression of NRAS, a target of miR-145-5. FUT8-AS1 further represses MAPK signaling via downregulating NRAS. Functional rescue assays demonstrated that inhibition of miR-145-5p reverses the tumor suppressive roles of FUT8-AS1 in melanoma. The oncogenic roles of FUT8-AS1 silencing are also blocked by MAPK signaling inhibitor MEK162. In conclusion, these findings demonstrate that FUT8-AS1 exerts tumor suppressive roles in melanoma via regulating NF90/miR-145-5p/NRAS/MAPK signaling axis. Targeting FUT8-AS1 and its downstream molecular signaling axis represent promising therapeutic strategies for melanoma.
Insights
FUT8-AS1 acts as a tumor suppressor in melanoma by inhibiting cell growth and metastasis. Its downregulation correlates with poor prognosis, suggesting it as a potential therapeutic target for skin cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Melanoma is a deadly skin cancer with unclear molecular drivers.
- Identifying prognostic biomarkers is crucial for melanoma treatment.
Purpose of the Study:
- To identify novel long non-coding RNAs (lncRNAs) involved in melanoma progression.
- To elucidate the molecular mechanisms of FUT8-AS1 in melanoma.
Main Methods:
- Analysis of The Cancer Genome Atlas (TCGA) data.
- In vitro and in vivo functional assays.
- Mechanistic studies involving RNA-protein interactions and signaling pathways.
Main Results:
- FUT8-AS1 is downregulated in melanoma and associated with poor survival.
- FUT8-AS1 suppresses melanoma cell proliferation, migration, invasion, growth, and metastasis.
- FUT8-AS1 regulates the NF90/miR-145-5p/NRAS/MAPK signaling axis.
Conclusions:
- FUT8-AS1 functions as a tumor suppressor in melanoma.
- Targeting FUT8-AS1 and its downstream pathway offers potential therapeutic strategies for melanoma.
More Related Videos
Related Concept Videos
MicroRNAs
MicroRNAs
MAPK Signaling Cascades
mTOR Signaling and Cancer Progression
The mTOR pathway or the...
Abnormal Proliferation
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...

