» Articles » PMID: 37760447

Differentiating Benign from Malignant Thyroid Tumors by Kinase Activity Profiling and Dabrafenib BRAF V600E Targeting

Overview
Journal Cancers (Basel)
Publisher MDPI
Specialty Oncology
Date 2023 Sep 28
PMID 37760447
Authors
Affiliations
Soon will be listed here.
Abstract

Differentiated non-medullary thyroid cancer (NMTC) can be effectively treated by surgery followed by radioactive iodide therapy. However, a small subset of patients shows recurrence due to a loss of iodide transport, a phenotype frequently associated with BRAF V600E mutations. In theory, this should enable the use of existing targeted therapies specifically designed for BRAF V600E mutations. However, in practice, generic or specific drugs aimed at molecular targets identified by next generation sequencing (NGS) are not always beneficial. Detailed kinase profiling may provide additional information to help improve therapy success rates. In this study, we therefore investigated whether serine/threonine kinase (STK) activity profiling can accurately classify benign thyroid lesions and NMTC. We also determined whether dabrafenib (BRAF V600E-specific inhibitor), as well as sorafenib and regorafenib (RAF inhibitors), can differentiate BRAF V600E from non-BRAF V600E thyroid tumors. Using 21 benign and 34 malignant frozen thyroid tumor samples, we analyzed serine/threonine kinase activity using PamChippeptide microarrays. An STK kinase activity classifier successfully differentiated malignant (26/34; 76%) from benign tumors (16/21; 76%). Of the kinases analyzed, PKC (theta) and PKD1 in particular, showed differential activity in benign and malignant tumors, while oncocytic neoplasia or Graves' disease contributed to erroneous classifications. Ex vivo BRAF V600E-specific dabrafenib kinase inhibition identified 6/92 analyzed peptides, capable of differentiating BRAF V600E-mutant from non-BRAF V600E papillary thyroid cancers (PTCs), an effect not seen with the generic inhibitors sorafenib and regorafenib. In conclusion, STK activity profiling differentiates benign from malignant thyroid tumors and generates unbiased hypotheses regarding differentially active kinases. This approach can serve as a model to select novel kinase inhibitors based on tissue analysis of recurrent thyroid and other cancers.

References
1.
Huo K, Notsuda H, Fang Z, Liu N, Gebregiworgis T, Li Q . Lung Cancer Driven by BRAF Mutation Is Targetable by EGFR Kinase Inhibitors. J Thorac Oncol. 2021; 17(2):277-288. DOI: 10.1016/j.jtho.2021.09.008. View

2.
Sibinga Mulder B, Mieog J, Handgraaf H, Sarasqueta A, Vasen H, Potjer T . Targeted next-generation sequencing of FNA-derived DNA in pancreatic cancer. J Clin Pathol. 2016; 70(2):174-178. DOI: 10.1136/jclinpath-2016-203928. View

3.
Rothenberg S, McFadden D, Palmer E, Daniels G, Wirth L . Redifferentiation of iodine-refractory BRAF V600E-mutant metastatic papillary thyroid cancer with dabrafenib. Clin Cancer Res. 2015; 21(5):1028-35. DOI: 10.1158/1078-0432.CCR-14-2915. View

4.
Brose M, Cabanillas M, Cohen E, Wirth L, Riehl T, Yue H . Vemurafenib in patients with BRAF(V600E)-positive metastatic or unresectable papillary thyroid cancer refractory to radioactive iodine: a non-randomised, multicentre, open-label, phase 2 trial. Lancet Oncol. 2016; 17(9):1272-82. PMC: 5532535. DOI: 10.1016/S1470-2045(16)30166-8. View

5.
Corver W, Ruano D, Weijers K, Hartog W, van Nieuwenhuizen M, de Miranda N . Genome haploidisation with chromosome 7 retention in oncocytic follicular thyroid carcinoma. PLoS One. 2012; 7(6):e38287. PMC: 3365880. DOI: 10.1371/journal.pone.0038287. View