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Abstract
Aim: To clarify the association between response to Trastuzumab and molecular expression of TIM-3 and FOXP-3 immune checkpoints. Materials and Methods: FOXP-3 and TIM-3 expression in peripheral blood was analyzed using qPCR, and the serum level of Trastuzumab was estimated using an immune sorbent enzyme assay. Results: During treatment with Trastuzumab, the FOXP-3 gene expression showed a significant decline throughout one year of treatment, going from 0.85 at cycle 9 to 0.75 at cycle 17. While the TIM-3 gene expression showed a significant up regulation at cycle 9 to 2.8 fold, followed by a reduction in the fold change from 2.8 to 1.7 in the font of reference gene expression. Conclusions:FOXP-3 and TIM-3 have the potential to be suggestive markers that can anticipate the response to Trastuzumab, but they are not capable of predicting the likelihood of recurrence.
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