Related Experiment Video
Updated: Feb 23, 2026
Evaluation of Lung Metastasis in Mouse Mammary Tumor Models by Quantitative Real-time PCR
Published on: January 29, 2016
Assessing the activity of nonsense-mediated mRNA decay in lung cancer
Meng Wang1, Peiwei Zhang1, Yufei Zhu1
1State Key Laboratory of Medical Genomics, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences and Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.
Background:
Inhibition of nonsense-mediated mRNA decay (NMD) in tumor cells can suppress tumor growth through expressing new antigens whose mRNAs otherwise are degraded by NMD. Thus NMD inhibition is a promising approach for developing cancer therapies. Apparently, the success of this approach relies on the basal NMD activity in cancer cells. If NMD is already strongly inhibited in tumors, the approach would not work. Therefore, it is crucial to assess NMD activity in cancers to forecast the efficacy of NMD-inhibition based therapy.
Methods:
Here we develop three metrics using RNA-seq data to measure NMD activity, and apply them to a dataset consisting of 72 lung cancer (adenocarcinoma) patients.
Results:
We show that these metrics have good correlations, and that the NMD activities in adenocarcinoma samples vary among patients: some cancerous samples show significantly stronger NMD activities than the normal tissues while some others show the opposite pattern. The variation of NMD activities among these samples may be partly explained by the varying expression of NMD effectors.
Conclusions:
In sum, NMD activity varies among lung cancerous samples, which forecasts varying efficacies of NMD-inhibition based therapy. The developed metrics can be further used in other cancer types to assess NMD activity.
Insights
Nonsense-mediated mRNA decay (NMD) inhibition shows promise for cancer therapy by boosting new antigens. However, efficacy varies, as NMD activity differs among lung cancer patients, necessitating assessment before treatment.
Area of Science:
- Molecular Biology
- Cancer Research
- Genomics
Background:
- Nonsense-mediated mRNA decay (NMD) regulates gene expression by degrading specific mRNAs.
- Inhibiting NMD in tumor cells can enhance the expression of novel antigens, potentially suppressing tumor growth.
- The efficacy of NMD inhibition as a cancer therapy is contingent upon the basal NMD activity within cancer cells.
Purpose of the Study:
- To develop and validate metrics for measuring NMD activity using RNA-seq data.
- To assess the variability of NMD activity in lung adenocarcinoma.
- To evaluate the implications of NMD activity variation for NMD-inhibition based cancer therapies.
Main Methods:
- Development of three distinct metrics to quantify NMD activity.
- Application of these metrics to RNA-sequencing data from 72 lung adenocarcinoma patients.
- Correlation analysis of the developed metrics and comparison of NMD activity between tumor and normal tissues.
Main Results:
- The three developed NMD activity metrics demonstrated good inter-correlation.
- Significant variation in NMD activity was observed among lung adenocarcinoma samples.
- Some tumors exhibited higher NMD activity than adjacent normal tissues, while others showed the reverse, potentially linked to NMD effector expression.
Conclusions:
- NMD activity is heterogeneous across lung cancer samples, impacting the predicted success of NMD-inhibition therapies.
- The developed metrics provide a valuable tool for assessing NMD activity in lung adenocarcinoma and can be applied to other cancer types.
- Assessing NMD activity is crucial for forecasting the therapeutic efficacy of NMD-inhibition strategies.
Related Concept Videos
02:27Nonsense-mediated mRNA Decay
02:27Nonsense-mediated mRNA Decay
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
02:31Nuclear Export of mRNA
01:22MicroRNAs