RT Journal Article SR Electronic T1 Chasing Hippos: Implications of YAP1 and TAZ Expression in Pregnancy-associated Breast Cancer Tumorigenesis JF In Vivo JO In Vivo FD International Institute of Anticancer Research SP 2869 OP 2874 DO 10.21873/invivo.13027 VO 36 IS 6 A1 ANASTASIOS KYRIAZOGLOU A1 ANNA-MARIA KORAKITI A1 ALKISTIS-MARIA PAPATHEODORIDI A1 KLEONIKI APOSTOLIDOU A1 AFRODITI NONNI A1 ELENI ZOGRAFOS A1 GARYFALIA BLETSA A1 DIMITRIS TSAKOGIANNIS A1 MELETIOS-ATHANASIOS DIMOPOULOS A1 FLORA ZAGOURI YR 2022 UL http://iv.iiarjournals.org/content/36/6/2869.abstract AB 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.