Multi-Omics Database Analysis of Aminoacyl-tRNA Synthetases in Cancer

Area of Science:

• Molecular Biology
• Genomics
• Cancer Research

Background:

• Aminoacyl-tRNA synthetases (aaRSs) are crucial for protein synthesis but also have non-canonical roles in complex organisms.
• The involvement of aaRSs and aaRS-interacting multi-functional proteins (AIMPs) in tumorigenesis is increasingly recognized, though often studied in isolation.
• Existing research frequently focuses on specific aaRSs within particular cancer types, limiting a comprehensive understanding.

Purpose of the Study:

• To conduct a broad analysis of human cytoplasmic and mitochondrial aaRSs across diverse cancer types using public genomic and transcriptomic data.
• To investigate the molecular and prognostic impact of aaRS expression on cancer by integrating Cancer Genome Atlas (TCGA) data with patient survival information.
• To compare the oncogenic or tumor-suppressive trends of aaRSs with known cancer-related genes.

Main Methods:

• Analysis of publicly available genomic and transcriptomic data from the Cancer Genome Atlas (TCGA) project, encompassing over 20,000 cancer and normal samples across 33 cancer types.
• Examination of aaRS gene expression levels in relation to cancer aggressiveness and patient survival data.
• Comparative analysis of observed aaRS trends against a known tumor suppressor and a proto-oncogene.

Main Results:

• Observation of widespread upregulation of many tRNA synthetase genes in aggressive cancer types.
• Identification of individual aaRS genes exhibiting characteristics of both tumor suppressors and oncogenes.
• Demonstration that aaRSs display varied roles, with some acting as oncogenes and others as tumor suppressors, depending on the specific gene and cancer context.

Conclusions:

• This study provides an unbiased, comprehensive overview of the multifaceted roles of aaRSs in various cancers.
• Certain aaRS family members emerge as potential therapeutic targets for biological cancer therapy.
• The findings highlight the complex, context-dependent involvement of aaRSs in tumorigenesis, necessitating further investigation for targeted treatment strategies.