FKBP10 Promotes the Muscle Invasion of Bladder Cancer via Lamin A Dysregulation.

Bladder cancer (BC) is a prevalent urinary malignancy and muscle-invasive bladder cancer (MIBC) is particularly aggressive and associated with poor prognosis. One of MIBC features is the nuclear atypia. However, the molecular mechanism underlying MIBC remains unclear. Here, we find that FKBP10 is significantly upregulated in MIBC tissues and correlated with metastasis and poor outcomes. FKBP10 promotes tumor cell invasion, migration, and metastasis, but not proliferation. Notably, FKBP10 enhances the nuclear atypia of BC cells. Mechanistically, FKBP10 interacts with prelamin A and hinder the nuclear entry of prelamin A, thereby leading to the decrease in the nuclear lamin A, a key factor involved in nuclear atypia. In human BC tissues, nuclear lamin A is downregulated and negatively correlated with FKBP10 expression. Overall, our findings demonstrate that the FKBP10/prelamin A/lamin A axis contributes to MIBC.