| First Author | Gao S | Year | 2022 |
| Journal | Nat Commun | Volume | 13 |
| Issue | 1 | Pages | 2792 |
| PubMed ID | 35589707 | Mgi Jnum | J:324998 |
| Mgi Id | MGI:7283381 | Doi | 10.1038/s41467-022-30409-1 |
| Citation | Gao S, et al. (2022) TUBB4A interacts with MYH9 to protect the nucleus during cell migration and promotes prostate cancer via GSK3beta/beta-catenin signalling. Nat Commun 13(1):2792 |
| abstractText | Human tubulin beta class IVa (TUBB4A) is a member of the beta-tubulin family. In most normal tissues, expression of TUBB4A is little to none, but it is highly expressed in human prostate cancer. Here we show that high expression levels of TUBB4A are associated with aggressive prostate cancers and poor patient survival, especially for African-American men. Additionally, in prostate cancer cells, TUBB4A knockout (KO) reduces cell growth and migration but induces DNA damage through increased gammaH2AX and 53BP1. Furthermore, during constricted cell migration, TUBB4A interacts with MYH9 to protect the nucleus, but either TUBB4A KO or MYH9 knockdown leads to severe DNA damage and reduces the NF-kappaB signaling response. Also, TUBB4A KO retards tumor growth and metastasis. Functional analysis reveals that TUBB4A/GSK3beta binds to the N-terminal of MYH9, and that TUBB4A KO reduces MYH9-mediated GSK3beta ubiquitination and degradation, leading to decreased activation of beta-catenin signaling and its relevant epithelial-mesenchymal transition. Likewise, prostate-specific deletion of Tubb4a reduces spontaneous tumor growth and metastasis via inhibition of NF-kappaB, cyclin D1, and c-MYC signaling activation. Our results suggest an oncogenic role of TUBB4A and provide a potentially actionable therapeutic target for prostate cancers with TUBB4A overexpression. |
