PIK3R1 fusion drives chemoresistance in ovarian cancer by activating ERK1/2 and inducing rod and ring-like structures

Autor: Heidi Rausio, Alejandra Cervera, Vanina D. Heuser, Gun West, Jaana Oikkonen, Elena Pianfetti, Marta Lovino, Elisa Ficarra, Pekka Taimen, Johanna Hynninen, Rainer Lehtonen, Sampsa Hautaniemi, Olli Carpén, Kaisa Huhtinen
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Neoplasia: An International Journal for Oncology Research, Vol 51, Iss , Pp 100987- (2024)
Druh dokumentu: article
ISSN: 1476-5586
DOI: 10.1016/j.neo.2024.100987
Popis: Gene fusions are common in high-grade serous ovarian cancer (HGSC). Such genetic lesions may promote tumorigenesis, but the pathogenic mechanisms are currently poorly understood. Here, we investigated the role of a PIK3R1-CCDC178 fusion identified from a patient with advanced HGSC. We show that the fusion induces HGSC cell migration by regulating ERK1/2 and increases resistance to platinum treatment. Platinum resistance was associated with rod and ring-like cellular structure formation. These structures contained, in addition to the fusion protein, CIN85, a key regulator of PI3K-AKT-mTOR signaling. Our data suggest that the fusion-driven structure formation induces a previously unrecognized cell survival and resistance mechanism, which depends on ERK1/2-activation.
Databáze: Directory of Open Access Journals