1
|
Mazzu YZ, Liao YR, Nandakumar S, Jehane LE, Koche RP, Rajanala SH, Li R, Zhao H, Gerke TA, Chakraborty G, Lee GSM, Nanjangud GJ, Gopalan A, Chen Y, Kantoff PW. Prognostic and therapeutic significance of COP9 signalosome subunit CSN5 in prostate cancer. Oncogene 2022; 41:671-682. [PMID: 34802033 PMCID: PMC9359627 DOI: 10.1038/s41388-021-02118-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 11/03/2021] [Accepted: 11/09/2021] [Indexed: 12/16/2022]
Abstract
Chromosome 8q gain is associated with poor clinical outcomes in prostate cancer, but the underlying biological mechanisms remain to be clarified. CSN5, a putative androgen receptor (AR) partner that is located on chromosome 8q, is the key subunit of the COP9 signalosome, which deactivates ubiquitin ligases. Deregulation of CSN5 could affect diverse cellular functions that contribute to tumor development, but there has been no comprehensive study of its function in prostate cancer. The clinical significance of CSN5 amplification/overexpression was evaluated in 16 prostate cancer clinical cohorts. Its oncogenic activity was assessed by genetic and pharmacologic perturbations of CSN5 activity in prostate cancer cell lines. The molecular mechanisms of CSN5 function were assessed, as was the efficacy of the CSN5 inhibitor CSN5i-3 in vitro and in vivo. Finally, the transcription cofactor activity of CSN5 in prostate cancer cells was determined. The prognostic significance of CSN5 amplification and overexpression in prostate cancer was independent of MYC amplification. Inhibition of CSN5 inhibited its oncogenic function by targeting AR signaling, DNA repair, multiple oncogenic pathways, and spliceosome regulation. Furthermore, inhibition of CSN5 repressed metabolic pathways, including oxidative phosphorylation and glycolysis in AR-negative prostate cancer cells. Targeting CSN5 with CSN5i-3 showed potent antitumor activity in vitro and in vivo. Importantly, CSN5i-3 synergizes with PARP inhibitors to inhibit prostate cancer cell growth. CSN5 functions as a transcription cofactor to cooperate with multiple transcription factors in prostate cancer. Inhibiting CSN5 strongly attenuates prostate cancer progression and could enhance PARP inhibition efficacy in the treatment of prostate cancer.
Collapse
Affiliation(s)
- Ying Z. Mazzu
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Corresponding author name(s), contact info: Philip W. Kantoff, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA, Tel: 212-639-5851, Fax: 929-321-5023, , Ying Z. Mazzu, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA, Tel: 646-888-3190, Fax: 929-321-5023,
| | - Yu-Rou Liao
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Subhiksha Nandakumar
- Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Lina E. Jehane
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Richard P. Koche
- Epigenetics Innovation Lab, Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Sai Harisha Rajanala
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ruifang Li
- Epigenetics Innovation Lab, Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - HuiYong Zhao
- Antitumor Assessment Core Facility, Memorial Sloan Kettering Cancer Center, New York, New York
| | | | - Goutam Chakraborty
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Gwo-Shu Mary Lee
- Department of Medicine, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Gouri J. Nanjangud
- Molecular Cytogenetics Core Facility, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Anuradha Gopalan
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Yu Chen
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Philip W. Kantoff
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.,Corresponding author name(s), contact info: Philip W. Kantoff, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA, Tel: 212-639-5851, Fax: 929-321-5023, , Ying Z. Mazzu, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA, Tel: 646-888-3190, Fax: 929-321-5023,
| |
Collapse
|
2
|
Wang M, Yang X, Ruan R, Fu H, Li H. Csn5 Is Required for the Conidiogenesis and Pathogenesis of the Alternaria alternata Tangerine Pathotype. Front Microbiol 2018; 9:508. [PMID: 29616013 PMCID: PMC5870056 DOI: 10.3389/fmicb.2018.00508] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 03/06/2018] [Indexed: 11/13/2022] Open
Abstract
The COP9 signalosome (CSN) is a highly conserved protein complex involved in the ubiquitin-proteasome system. Its metalloisopeptidase activity resides in subunit 5 (CSN5). Functions of csn5 in phytopathogenic fungi are poorly understood. Here, we knocked out the csn5 ortholog (Aacsn5) in the tangerine pathotype of Alternaria alternata. The ΔAacsn5 mutant showed a moderately reduced growth rate compared to the wildtype strain and was unable to produce conidia. The growth of ΔAacsn5 mutant was not affected in response to oxidative and osmotic stresses. Virulence assays revealed that ΔAacsn5 induced no or significantly reduced necrotic lesions on detached citrus leaves. The defects in hyphal growth, conidial sporulation, and pathogenicity of ΔAacsn5 were restored by genetic complementation of the mutant with wildtype Aacsn5. To explore the molecular mechanisms of conidiation and pathogenesis underlying Aacsn5 regulation, we systematically examined the transcriptomes of both ΔAacsn5 and the wildtype. Generally, 881 genes were overexpressed and 777 were underexpressed in the ΔAacsn5 mutant during conidiation while 694 overexpressed and 993 underexpressed during infection. During asexual development, genes related to the transport processes and nitrogen metabolism were significantly downregulated; the expression of csn1-4 and csn7 in ΔAacsn5 was significantly elevated; secondary metabolism gene clusters were broadly affected; especially, the transcript level of the whole of cluster 28 and 30 was strongly induced. During infection, the expression of the host-specific ACT toxin gene cluster which controls the biosynthesis of the citrus specific toxin was significantly repressed; many other SM clusters with unknown products were also regulated; 86 out of 373 carbohydrate-active enzymes responsible for breaking down the plant dead tissues showed uniquely decreased expression. Taken together, our results expand our understanding of the roles of csn5 on conidiation and pathogenicity in plant pathogenic fungi and provide a foundation for future investigations.
Collapse
Affiliation(s)
- Mingshuang Wang
- Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Xiao Yang
- Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Ruoxin Ruan
- Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China.,Hangzhou Academy of Agricultural Sciences, Hangzhou, China
| | - Huilan Fu
- Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Hongye Li
- Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| |
Collapse
|