Whole-exome Sequencing of Atypical Parathyroid Tumors Detects Novel and Common Genes Linked to Parathyroid Tumorigenesis
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View abstract on PubMed
Summary
This summary is machine-generated.Atypical parathyroid tumors (APTs) share molecular alterations with both benign and cancerous parathyroid lesions, lacking a unique genomic signature. Key pathways like PI3K/AKT/mTOR and Wnt signaling are implicated in parathyroid tumorigenesis.
Area Of Science
- Endocrinology
- Oncology
- Genomics
Background
- Atypical parathyroid tumors (APTs) present diagnostic challenges due to histological features resembling parathyroid carcinoma (PC) but lacking definitive invasion or metastasis.
- This ambiguity necessitates a deeper understanding of their molecular underpinnings to ascertain malignant potential.
Purpose Of The Study
- To comprehensively characterize the molecular landscape of APTs.
- To identify deregulated signaling pathways involved in APT development.
Main Methods
- Whole-exome sequencing (WES) was performed on 16 APT samples and matched peripheral blood.
- Bioinformatic analyses, including network analysis using STRING, were employed to identify frequently mutated genes and key signaling hubs.
Main Results
- 192 nonsynonymous variants were identified, with a median of 9 protein-altering mutations per tumor.
- Frequently mutated genes include BCOR, EZH1, MUC16, and others. Seventeen mutated genes are listed in the Cancer Gene Census.
- Key deregulated pathways identified were PI3K/AKT/mTOR, Wnt signaling, and extracellular matrix organization. Notably, variants in MEN1, CDC73, EZH2, PIK3CA, and MTOR were observed.
Conclusions
- APTs do not possess a distinct molecular signature, sharing genomic alterations with both parathyroid adenoma (PA) and PC.
- The PI3K/AKT/mTOR and Wnt signaling pathways are confirmed as pivotal in parathyroid tumorigenesis.
- Mutations in epigenetic modifier genes (e.g., BCOR, EZH2) involved in chromatin remodeling were identified, highlighting their role in parathyroid tumor development.
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