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SHR Neuro Krebs Kardio Lipid Stoffw Microb

Klocker, EV; Suppan, C.
Biomarkers in Her2-Positive Disease.
BREAST CARE. 2020; 15(6): 586-593. Doi: 10.1159/000512283
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Führende Autor*innen der Med Uni Graz
Klocker Eva Valentina
Co-Autor*innen der Med Uni Graz
Suppan Christoph

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Background: Breast cancer is a heterogeneous disease with well-known characteristics such as hormone receptor (HR) status and human epidermal growth factor (Her)2 status. Although Her2 represents an established treatment target, the development of resistance mechanisms during treatment, cardiotoxicity, and a worse response to standard therapies lead to worse outcomes. Summary: Therefore, we investigated various biomarkers in breast cancer such as Her2 mutations, Her2 heterogeneity, HR, PIK3CA, PTEN, programmed death receptor ligand 1 (PD-L1), tumor-infiltrating lymphocytes (TIL), micro RNA (miRNA), and BRCA mutations with regard to their clinical impact in Her2-positive disease. HR status and Her2 status, such as the presence of PIK3CA mutations, already play a role in treatment decision-making processes, whereas other biomarkers like PD-L1 status or TIL represent promising future markers. The influence of BRCA mutations in Her2-positive disease, Her2 mutations, and the impact of miRNA is vague to date. Antibody-drug conjugates (ADC) such as T-DM have been established as important treatment strategies, especially in Her2-positive disease. Key Message: However, up-to-date biomarkers appropriate for clinical practice are missing. Further studies are needed.

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Breast cancer
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