Journal article

Concurrent RB1 loss and BRCA-deficiency predicts enhanced immunological response and long-term survival in tubo-ovarian high-grade serous carcinoma.

Flurina AM Saner, Kazuaki Takahashi, Timothy Budden, Ahwan Pandey, Dinuka Ariyaratne, Tibor A Zwimpfer, Nicola S Meagher, Sian Fereday, Laura Twomey, Kathleen I Pishas, Therese Hoang, Adelyn Bolithon, Nadia Traficante, Kathryn Alsop, Elizabeth L Christie, Eun-Young Kang, Gregg S Nelson, Prafull Ghatage, Cheng-Han Lee, Marjorie J Riggan Show all

medRxiv | Published : 2023

Abstract

BACKGROUND: Somatic loss of the tumour suppressor RB1 is a common event in tubo-ovarian high-grade serous carcinoma (HGSC), which frequently co-occurs with alterations in homologous recombination DNA repair genes including BRCA1 and BRCA2 (BRCA). We examined whether tumour expression of RB1 was associated with survival across ovarian cancer histotypes (HGSC, endometrioid (ENOC), clear cell (CCOC), mucinous (MOC), low-grade serous carcinoma (LGSC)), and how co-occurrence of germline BRCA pathogenic variants and RB1 loss influences long-term survival in a large series of HGSC. PATIENTS AND METHODS: RB1 protein expression patterns were classified by immunohistochemistry in epithelial ovarian ca..

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