Abstract
The Triple Negative Breast Cancer (TNBC), despite a good initial response to conventional chemotherapy, relapses frequently and has a poor prognosis after the onset of metastases. It is therefore interesting to develop new relevant targets to establish a prognosis but also potentially to propose a targeted therapy for a theranostic approach. A high density of M2-type macrophages presence in the primary TNBC tumor predicted an unfavorable prognosis. The presence of activated M2-type macrophages can be evaluated by measuring the expression of a translocating protein (TSPO) with [18F]-DPA-714 PETCT. This proof-of-concept study with [18F]-DPA-714 PET-CT has a design to establish the correlation between immunohistochemistry tumor characterization and in vivo imaging. If a valid correlation will be established, [18F]-DPA-714 PET-CT could be a based image prognosis biomarker, apart from pathological data, which can be fragmented as biopsy or modified by previous treatments. It would allow adapting early the type/dose-intensity of treatment and considering developments of treatments targeting M2-type macrophages
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