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Molecular Modeling Unveils the Effective Interaction of B-RAF Inhibitors with Rare B-RAF Insertion Variants. | LitMetric

AI Article Synopsis

  • * A case study of a patient with the rare p.T599dup B-RAF mutation showed significant improvement when treated with Dabrafenib/Trametinib, highlighting the need for further research into these uncommon variants.
  • * Advanced modeling techniques demonstrated that Dabrafenib could effectively bind to both the p.T599dup and another rare variant, suggesting that the effectiveness of BRAF inhibitors might extend to other BRAF mutations beyond just V600.

Article Abstract

The Food and Drug Administration (FDA) has approved MAPK inhibitors as a treatment for melanoma patients carrying a mutation in codon V600 of the BRAF gene exclusively. However, BRAF mutations outside the V600 codon may occur in a small percentage of melanomas. Although these rare variants may cause B-RAF activation, their predictive response to B-RAF inhibitor treatments is still poorly understood. We exploited an integrated approach for mutation detection, tumor evolution tracking, and assessment of response to treatment in a metastatic melanoma patient carrying the rare p.T599dup B-RAF mutation. He was addressed to Dabrafenib/Trametinib targeted therapy, showing an initial dramatic response. In parallel, in-silico ligand-based homology modeling was set up and performed on this and an additional B-RAF rare variant (p.A598_T599insV) to unveil and justify the success of the B-RAF inhibitory activity of Dabrafenib, showing that it could adeptly bind both these variants in a similar manner to how it binds and inhibits the V600E mutant. These findings open up the possibility of broadening the spectrum of BRAF inhibitor-sensitive mutations beyond mutations at codon V600, suggesting that B-RAF V600 WT melanomas should undergo more specific investigations before ruling out the possibility of targeted therapy.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10418914PMC
http://dx.doi.org/10.3390/ijms241512285DOI Listing

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