TY - JOUR T1 - Chasing Hippos: Implications of YAP1 and TAZ Expression in Pregnancy-associated Breast Cancer Tumorigenesis JF - In Vivo JO - In Vivo SP - 2869 LP - 2874 DO - 10.21873/invivo.13027 VL - 36 IS - 6 AU - ANASTASIOS KYRIAZOGLOU AU - ANNA-MARIA KORAKITI AU - ALKISTIS-MARIA PAPATHEODORIDI AU - KLEONIKI APOSTOLIDOU AU - AFRODITI NONNI AU - ELENI ZOGRAFOS AU - GARYFALIA BLETSA AU - DIMITRIS TSAKOGIANNIS AU - MELETIOS-ATHANASIOS DIMOPOULOS AU - FLORA ZAGOURI Y1 - 2022/11/01 UR - http://iv.iiarjournals.org/content/36/6/2869.abstract N2 - Background/Aim: The Hippo pathway is a molecular pathway recently associated with tumorigenesis, metastasis, and drug resistance. Pregnancy-associated breast cancer (PABC) is the most common malignancy diagnosed during gestation; however, the molecular mechanisms underlying PABC are largely unknown. The aim of the present study was to evaluate Hippo pathway transducers TAZ and YAP1 expression in PABC in relation to the clinicopathological characteristics of the disease. Patients and Methods: Formalin-fixed paraffin-embedded (FFPE) tissues from 21 PABC patients treated at Alexandra Hospital in Athens, Greece, were analyzed with immunohistochemistry. Results: Strong nuclear TAZ/YAP1 stanning was found in 48% of the PABC patients analyzed. Hormone receptor negative patients had a statistically significant correlation with strong positive expression of TAZ/YAP1 co-transcription factors. No association was observed with overall and disease-free survival. Conclusion: The Hippo pathway is de-regulated in a subset of PABC patients, highlighting the complex molecular background of the disease, which certainly requires further investigation. ER -