The Journal of Clinical Endocrinology and Metabolism Journal Article

Papillary Thyroid Cancer Recurrence Risk Factors

May 17, 2022
 

Hannah R Nieto, Caitlin E M Thornton, Katie Brookes, Albert Nobre de Menezes, Alice Fletcher, Mohammed Alshahrani, Merve Kocbiyik, Neil Sharma, Kristien Boelaert, Jean-Baptiste Cazier, Hisham Mehanna, Vicki E Smith, Martin L Read, Christopher J McCabe
The Journal of Clinical Endocrinology & Metabolism, Volume 107, Issue 5, May 2022, Pages 1392–1406
https://doi.org/10.1210/clinem/dgab836

Abstract

Context

Thyroid cancer recurrence is associated with increased mortality and adverse outcomes. Recurrence risk is currently predicted using clinical tools, often restaging patients after treatment. Detailed understanding of recurrence risk at disease onset could lead to personalized and improved patient care.

Objective

We aimed to perform a comprehensive bioinformatic and experimental analysis of 3 levels of genetic change (mRNA, microRNA, and somatic mutation) apparent in recurrent tumors and construct a new combinatorial prognostic risk model.

Methods

We analyzed The Cancer Genome Atlas data (TCGA) to identify differentially expressed genes (mRNA/microRNA) in 46 recurrent vs 455 nonrecurrent thyroid tumors. Two exonic mutational pipelines were used to identify somatic mutations. Functional gene analysis was performed in cell-based assays in multiple thyroid cell lines. The prognostic value of genes was evaluated with TCGA datasets.

Results

We identified 128 new potential biomarkers associated with recurrence, including 40 mRNAs, 39 miRNAs, and 59 genetic variants. Among differentially expressed genes, modulation of FN1, ITGα3, and MET had a significant impact on thyroid cancer cell migration. Similarly, ablation of miR-486 and miR-1179 significantly increased migration of TPC-1 and SW1736 cells. We further utilized genes with a validated functional role and identified a 5-gene risk score classifier as an independent predictor of thyroid cancer recurrence.

Conclusion

Our newly proposed risk model based on combinatorial mRNA and microRNA expression has potential clinical utility as a prognostic indicator of recurrence. These findings should facilitate earlier prediction of recurrence with implications for improving patient outcome by tailoring treatment to disease risk and increasing posttreatment surveillance.

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