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Updated: Nov 10, 2025

In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
Published on: August 23, 2019
Green tea polyphenols inhibit malignant melanoma progression via regulating circ_MITF/miR-30e-3p/HDAC2 axis
Kejia Wu1, Yuegang Wei2, Ye Yu1
1Department of Dermatology, Changzhou Hospital of Traditional Chinese Medicine, Changzhou, China.
Abstract:
Green tea polyphenols (GTPs) are regarded as anticancer substances and have been revealed to play significant roles in the development of malignant melanoma. However, the mechanisms by which GTPs perform anticarcinogenic activity are not well elucidated. Cellular function assays revealed that GTPs inhibited melanoma cell proliferation, migration, invasion, epithelial-mesenchymal transition (EMT), and promoted apoptosis in vitro. Circ_MITF expression was elevated in melanoma tissues and cells but was decreased by GTPs in cells. Functional experiments indicated circ_MITF overexpression reversed the anticancer effects of GTPs on melanoma cells. Then the underlying mechanism analysis suggested that circ_MITF served as a sponge for miR-30e-3p to upregulate the level of HDAC2. MiR-30e-3p reexpression attenuated the regulatory effects of circ_MITF on GTPs-treated melanoma cells. Silencing of miR-30e-3p promoted the malignant phenotypes in GTPs-treated melanoma cells, which were reversed by HDAC2 knockdown. Preclinically, administration of GTPs suppressed the expression of downstream target genes and repressed tumorigenesis of xenografts in nude mice. In all, GTPs suppressed melanoma progression by regulating circ_MITF/miR-30e-3p/HDAC2 axis, providing a potential therapeutic strategy for human malignant melanoma intervention.
Insights
Green tea polyphenols (GTPs) show anticancer effects against malignant melanoma by inhibiting cell growth and promoting apoptosis. GTPs regulate the circ_MITF/miR-30e-3p/HDAC2 pathway, offering a potential therapeutic strategy for melanoma.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Malignant melanoma is a significant health concern.
- Green tea polyphenols (GTPs) exhibit anticancer properties, but their mechanisms in melanoma are unclear.
- Understanding GTPs' molecular targets is crucial for therapeutic development.
Purpose of the Study:
- To elucidate the mechanisms underlying the anticarcinogenic effects of GTPs in malignant melanoma.
- To investigate the role of circ_MITF, miR-30e-3p, and HDAC2 in GTPs' action.
- To evaluate the therapeutic potential of GTPs in preclinical melanoma models.
Main Methods:
- In vitro cellular function assays (proliferation, migration, invasion, apoptosis, EMT).
- Analysis of circ_MITF, miR-30e-3p, and HDAC2 expression and interactions.
- In vivo xenograft studies in nude mice.
Main Results:
- GTPs inhibited melanoma cell proliferation, migration, invasion, EMT, and promoted apoptosis.
- GTPs decreased elevated circ_MITF expression, which was linked to melanoma progression.
- GTPs function via the circ_MITF/miR-30e-3p/HDAC2 axis, suppressing tumor growth in vivo.
Conclusions:
- GTPs suppress melanoma progression through the circ_MITF/miR-30e-3p/HDAC2 pathway.
- This pathway represents a potential therapeutic target for malignant melanoma intervention.
- GTPs demonstrate promise as a natural therapeutic agent for melanoma.
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