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Published on: September 15, 2023
Increased Expression of RCN1P2, TPM3P9, and HSP90AB3P as Non-Coding RNA in Gastric Cancer Linked to Proliferative,
Ensieh Sagheb Sadeghi1,2, Zahra Amrollahy Bioky2,3, Mahsa Hokmabadi2,4
1Department of Biology, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran.
Background:
This study aimed to find pseudogenes with significant expression alterations in gastric cancer (GC) that could be implicated in the disease's development via the competing endogenous RNAs (ceRNAs) network.
Methods:
Pseudogenes, mRNAs, and microRNAs, whose expression changes considerably in GC specimens, were identified using the Cancer Genome Atlas (TCGA) data from 2006 to 2017 (USA). The ceRNAs network was constructed using the miRWalk, miRTarBase, and DIANA-LncBase. The cox regression test was performed to assess the correlation between candidate genes and patient prognosis. Finally, using the RT-qPCR method, the in-silico results were evaluated using GC samples and adjacent normal. Samples were collected from Imam Khomeini Hospital in Tehran (Iran) between 2020 and 2021.
Results:
In the cancer samples compared to the normal ones, there were 86 miRNAs, 1985 mRNAs, and 33 pseudogenes showing expression alterations, either more than or less than a twofold difference. Constructed ceRNA network demonstrated that pseudogenes such as RCN1P2, TPM3P9, and HSP90AB3P were most connected to changed mRNAs and microRNAs in GC. The analysis of the ceRNA network for each of the mentioned pseudogenes indicated that the associated mRNAs play roles in cell proliferation, inflammation, and metastatic pathways. Furthermore, elevated expression of several mRNAs linked to potential pseudogenes was linked to a poor prognosis. RT-qPCR revealed a significant increase in the expression levels of RCN1P2, TPM3P9, and HSP90AB3P in GC samples.
Conclusion:
The expression of RCN1P2, TPM3P9, and HSP90AB3P is dramatically enhanced in GC. They can also influence the survival rate of GC patients by regulating pathways involved in cell proliferation, inflammation, and metastasis via the ceRNAs network.
Insights
Altered pseudogene expression, including RCN1P2, TPM3P9, and HSP90AB3P, is linked to gastric cancer (GC) progression. These pseudogenes influence cell proliferation, inflammation, and metastasis through the competing endogenous RNA network, impacting patient survival.
Area of Science:
- Oncology
- Molecular Biology
- Genomics
Background:
- Gastric cancer (GC) pathogenesis involves complex molecular alterations.
- Pseudogenes, non-coding RNAs, are increasingly recognized for their roles in cancer development.
Purpose of the Study:
- Identify pseudogenes with altered expression in GC.
- Investigate their role in GC development via the competing endogenous RNA (ceRNA) network.
Main Methods:
- Utilized TCGA data (2006-2017) to identify differentially expressed pseudogenes, mRNAs, and microRNAs in GC.
- Constructed a ceRNA network using miRWalk, miRTarBase, and DIANA-LncBase.
- Validated in-silico findings using RT-qPCR on GC and adjacent normal tissue samples.
Main Results:
- Identified 33 pseudogenes with significant expression changes in GC.
- Pseudogenes RCN1P2, TPM3P9, and HSP90AB3P showed high connectivity within the ceRNA network.
- Upregulated pseudogenes were associated with pathways in cell proliferation, inflammation, and metastasis, correlating with poor prognosis.
Conclusions:
- Pseudogenes RCN1P2, TPM3P9, and HSP90AB3P are significantly upregulated in GC.
- These pseudogenes potentially drive GC progression by modulating key cellular pathways via the ceRNA network, affecting patient survival.
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