Systems biology research and bioinformatic analysis of PPP3R1 RNA interaction and expression analysis in non-small cell lung cancer (NSCLC)
Fatemeh Salehi,1Ali Ghaneh,2,*
1. Department of Sciences and Biotechnology, Shahid Ashrafi Isfahani University, Isfahan,Iran 2. Department of Sciences and Biotechnology, Shahid Ashrafi Isfahani University, Isfahan,Iran
Introduction: Lung adenocarcinoma (LUAD) and lung squamous cell carcinoma (LUSC) are the two most
common types of lung cancer. In the past, they were grouped together under the name non-small
cell lung cancer (NSCLC) and treated the same way. However, new studies suggest that LUAD and
LUSC are different diseases and should be treated separately. Still, the specific clinical differences
between LUAD and LUSC have not been fully explained yet (1)(2).
The mitoribosome's regulatory subunit MRPL35 can control how cytochrome c oxidases assemble
and is crucial for the development of non-small cell lung cancer (NSCLC).
Knockdown of MRPL35 suppressed cell proliferation and decreased NSCLC progression both in
vitro and in vivo. The possible molecular mechanisms were also clarified, which indicated that
MRPL35 could be involved in cell apoptosis and proliferation by modulating the expression levels of
CDK1, BIRC5, CHEK1, STMN1 and MCM2
Methods: Microarray analysis (GSE225959) was used to identify the key protein-coding gene affected in
NSCLC. Validation of these findings and survival analysis were conducted using ENCORI. RNA and
protein interactions were explored through miRWalk, lncRRIsearch, and STRING. The Enrichr and
Reactome databases were employed to identify relevant signaling pathways.(4)
Results: Based on microarray analysis, PPP3R1 is significantly overexpressed in NSCLC. PPP3R1 modulates
signaling pathways such as Signal Transduction and PI3K/AKT Signaling in cancer. lncRNAs NEAT1
and AATBC interact with PPP3R1 mRNA. Additionally, miR-22-3p suppresses the expression of
PPP3R1 by binding to its 3’ UTR region.
Conclusion: miR-22-3p, along with lncRNAs NEAT1 and AATBC, regulate Signal Transduction and PI3K/AKT
signaling in cancer through their interaction with PPP3R1. PPP3R1, NEAT1, and AATBC may be
considered potential diagnostic biomarkers for non-small cell lung cancer (NSCLC).
Keywords: Microarray Analysis
Diffraction expression analysis, non small cell lung cancer
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