Related Experiment Video
Updated: Aug 30, 2025
Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells
Published on: February 22, 2020
MiR-30c facilitates natural killer cell cytotoxicity to lung cancer through targeting GALNT7
Fei Gao1, Jianjun Han2, Li Jia1
1Department of Oncology, The Third Hospital of Mianyang, Sichuan Mental Health Center), No. 190, East Section of Jiannan Road, Sichuan, 621000, China.
Background:
MicroRNAs (miRNAs) have been reported to play important roles in regulating natural killer (NK) cell cytotoxicity to cancer cells.
Objective:
This study aimed to investigate the effects and potential mechanism of miR-30c in regulating NK cell cytotoxicity to lung cancer cells.
Methods:
Primary NK cells were derived from the peripheral blood of lung cancer and normal participants. Exosomes were isolated and validated via transmission electron microscopy and nanoparticle tracking analysis. The levels of miR-30c, polypeptide N-acetylgalactosaminyltransferase 7 (GALNT7) and proteins in PI3K/AKT pathway were determined using quantitative real-time polymerase chain reaction or western blot. Tumor necrosis factor-α (TNF-α), interferon-γ (IFN-γ) levels and the cytotoxicity of effector NK cells to target lung cancer cells were measured via enzyme linked immunosorbent assay, cell apoptosis or xenograft experiments. The relationship between miR-30c and GALNT7 was analyzed by luciferase activity, RNA pull-down and RNA immunoprecipitation assays. And a xenograft mice model was established to verify the effect of miR-30c in regulating NK cell cytotoxicity to lung cancer cells in vivo.
Results:
NK cell-derived exosomes carrying miR-30c, and miR-30c level was significantly downregulated in primary NK cells of lung cancer patients. MiR-30c overexpression promoted TNF-α and IFN-γ secretion and enhanced the cytotoxicity of interleukin 2 (IL-2)-treated NK cells to lung cancer cells, while knockdown of miR-30c played an opposite effect in regulating the cytotoxicity of NK cells to lung cancer cells. GALNT7 was a target of miR-30c and was negatively regulated by miR-30c. Besides, miR-30c targeted GALNT7 to exert its function in regulating NK cell cytotoxicity. Furthermore, GALNT7 prompted the activation of PI3K/AKT pathway in NK cells. Additionally, miR-30c overexpression enhanced NK cell cytotoxicity to lung cancer cells and inhibited tumor growth in vivo.
Conclusion:
miR-30c enhanced NK cell cytotoxicity to lung cancer cells via decreasing GALNT7 and inactivating the PI3K/AKT pathway, suggesting that regulating miR-30c expression maybe a promising approach for enhancing NK cell-based antitumor therapies.
Insights
MicroRNA-30c enhances natural killer (NK) cell killing of lung cancer cells by targeting GALNT7 and inhibiting the PI3K/AKT pathway. This suggests miR-30c as a potential therapeutic target for improving NK cell-based cancer therapies.
Area of Science:
- Immunology
- Molecular Biology
- Oncology
Background:
- MicroRNAs (miRNAs) are crucial regulators of natural killer (NK) cell-mediated cytotoxicity against cancer cells.
- Understanding the specific roles of miRNAs in NK cell function is vital for developing novel cancer immunotherapies.
Purpose of the Study:
- To investigate the role and mechanism of miR-30c in regulating NK cell cytotoxicity towards lung cancer cells.
- To explore the potential of modulating miR-30c for enhancing anti-lung cancer immunity.
Main Methods:
- Isolation and characterization of NK cell-derived exosomes.
- Quantification of miR-30c, GALNT7, and PI3K/AKT pathway proteins via qRT-PCR and Western blot.
- Assessment of NK cell cytotoxicity, cytokine secretion (TNF-α, IFN-γ), and tumor growth in vivo using xenograft models.
Main Results:
- miR-30c was downregulated in NK cells from lung cancer patients and its overexpression enhanced NK cell cytotoxicity and cytokine production.
- miR-30c directly targets GALNT7, negatively regulating its expression and subsequently inhibiting the PI3K/AKT pathway.
- In vivo studies confirmed that miR-30c overexpression boosts NK cell-mediated tumor suppression.
Conclusions:
- miR-30c enhances NK cell cytotoxicity against lung cancer by downregulating GALNT7 and inactivating the PI3K/AKT pathway.
- Modulating miR-30c presents a promising strategy for augmenting NK cell-based immunotherapies for lung cancer.
Related Concept Videos
01:27Cytotoxic T Cells-mediated Immune Response
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
02:57Targeted Cancer Therapies
There are several types of targeted therapies against...
01:22MicroRNAs
01:28Cells of the Innate Immune Response
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
01:25Immune Surveillance by NK Cells and Phagocytes
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...