Related Experiment Videos
miR-877-5P acts as a tumor suppressor in multiple myeloma by targeting MAPK8: a study on prognostic value and
Zhimin Bai1, Qiulian Luo2, Shasha Zhao3
1Department of Hematology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China.
Objectives:
This study aimed to investigate Investigate the expression level, prognostic value, and biological function of miR-877-5p in MM.
Methods:
A total of 103 MM patients and 98 non-tumor controls were included in the study. miR-877-5p expression level was verified by RT-qPCR, and its prognostic value was evaluated through Kaplan-Meier and the Cox regression model. MM cell proliferation and apoptosis were assessed with the CCK‑8 assay and flow cytometry. The potential target genes of miR-877-5p were predicted by bioinformatics analysis and verified by dual luciferase assay. Rescue assays confirmed that MAPK8 mediates the regulatory function of miR-877-5p.
Results:
miR-877-5p was reduced in MM, and its low level was associated with a poorer overall survival of patients, being an independent prognosticator of poor survival in MM. Function experiments confirmed that overexpression of miR-877-5p could inhibit the proliferation of MM cells and promote apoptosis. Mechanistically, MAPK8 was a direct downstream target of miR-877-5p. MAPK8 was upregulated in MM and negatively correlated with miR-877-5p levels. Rescue assays were conducted to verify that MAPK8 overexpression reversed the effect of miR-877-5p on MM cell proliferation and apoptosis.
Discussion:
These findings indicate that miR-877-5p exerts tumor-suppressive functions in MM, likely through negative regulation of MAPK8. The miR-877-5p/MAPK8 axis may represent a novel regulatory pathway involved in MM progression.
Conclusions:
miR-877-5p acts as a tumor suppressor in MM and may serve as a potential biomarker for prognosis assessment. Its regulatory role in MM progression is likely mediated through targeting and inhibiting MAPK8.
Related Concept Videos
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...
MAPK Signaling Cascades
mTOR Signaling and Cancer Progression
The mTOR pathway or the...
mTOR Signaling and Cancer Progression
The mTOR pathway or the...
MicroRNAs