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Mondal M, Cao F, Conole D, Auner HW, Tate EW. Discovery of potent and selective activity-based probes (ABPs) for the deubiquitinating enzyme USP30. RSC Chem Biol 2024; 5:439-446. [PMID: 38725909 PMCID: PMC11078216 DOI: 10.1039/d4cb00029c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/07/2024] [Indexed: 05/12/2024] Open
Abstract
Ubiquitin-specific protease 30 (USP30) is a deubiquitinating enzyme (DUB) localized at the mitochondrial outer membrane and involved in PINK1/Parkin-mediated mitophagy, pexophagy, BAX/BAK-dependent apoptosis, and IKKβ-USP30-ACLY-regulated lipogenesis/tumorigenesis. A USP30 inhibitor, MTX652, has recently entered clinical trials as a potential treatment for mitochondrial dysfunction. Small molecule activity-based probes (ABPs) for DUBs have recently emerged as powerful tools for in-cell inhibitor screening and DUB activity analysis, and here, we report the first small molecule ABPs (IMP-2587 and IMP-2586) which can profile USP30 activity in cells. Target engagement studies demonstrate that IMP-2587 and IMP-2586 engage active USP30 at nanomolar concentration after only 10 min incubation time in intact cells, dependent on the presence of the USP30 catalytic cysteine. Interestingly, proteomics analyses revealed that DESI1 and DESI2, small ubiquitin-related modifier (SUMO) proteases, can also be engaged by these probes, further suggesting a novel approach to develop DESI ABPs.
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Affiliation(s)
- Milon Mondal
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London 82 Wood Lane London W12 0BZ UK
| | - Fangyuan Cao
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London 82 Wood Lane London W12 0BZ UK
| | - Daniel Conole
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London 82 Wood Lane London W12 0BZ UK
| | - Holger W Auner
- Department of Immunology and Inflammation, Imperial College London Du Cane Road London W12 0NN UK
| | - Edward W Tate
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London 82 Wood Lane London W12 0BZ UK
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Lu Y, Zhou XY, Zhou CL, Liu J, Yong T, Fan Y, Wang C. Insulin receptor tyrosine kinase substrate (IRTKS) promotes the tumorigenesis of pancreatic cancer via PI3K/AKT signaling. Hum Cell 2022; 35:1885-1899. [PMID: 36057038 DOI: 10.1007/s13577-022-00770-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 08/12/2022] [Indexed: 12/24/2022]
Abstract
Pancreatic cancer (PC) is a common type of tumor, which ranks for the seventh leading cause of cancer death worldwide. Insulin receptor tyrosine kinase substrate (IRTKS) plays an important regulatory role in cell proliferation, motility and survival. In this study, we explore the effect of IRTKS on the occurrence and development of PC. The expression and clinical features of IRTKS were predicted in database, PC cell lines and samples. IRTKS overexpressed and knocked down PC cell lines were established by lentivirus. CCK-8 assay, scratch migration assay and Transwell assay were used to analyze IRTKS oncogenic functions in cell lines. Bioinformatic enrichment analysis were conducted to explore the biological functions IRTKS involved in PC and Western Bolt assay was performed to reveal the downstream signaling molecules. It is detected that IRTKS is highly expressed in PC (P < 0.05), and overexpression of IRTKS predicted worse overall survival (OS, P = 0.018). The proliferation, migration and invasion ability were significantly enhanced in IRTKS overexpressed cells and inhibited in IRTKS knocked down cells (P < 0.05). Bioinformatic enrichment analysis based on GSE46583 dataset showed that IRTKS was significantly involved in PI3K/AKT pathway. Further investigation revealed that overexpression of IRTKS upregulated the ratio of p-PI3K/PI3K and p-AKT/AKT in vitro, while silencing of IRTKS presented opposite results, and PI3K inhibitor LY294002 treatment induced the phenotypic alteration of cell lines (P < 0.05). In conclusion, IRTKS plays an important role in PC tumorigenesis via PI3K/AKT pathway phosphorylated activation, and has a potential clinical application value in prognosis for PC.
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Affiliation(s)
- Yu Lu
- Fourth Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, China
| | - Xin-Yuan Zhou
- Fourth Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, China
| | - Cheng-Liang Zhou
- Fourth Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, China
| | - Jie Liu
- Fourth Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, China
| | - Tao Yong
- Fourth Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, China
| | - Yong Fan
- Fourth Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, China
| | - Chen Wang
- Fourth Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, China.
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Liu X, Zhang Y, Zheng P, Cui N. Msi1 inhibits cervical cancer cell apoptosis by downregulating BAK through AKT signaling. J Cancer 2021; 12:2422-2429. [PMID: 33758618 PMCID: PMC7974892 DOI: 10.7150/jca.52950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 01/13/2021] [Indexed: 12/11/2022] Open
Abstract
Musashi-1 (Msi1) is an RNA binding protein that functions as a regulator in multiple carcinomas. Our previous study demonstrated that Msi1 could promote the proliferation of cervical cancer cells by targeting the cell cycle proteins P21, P27 and P53. However, the mechanisms by which Msi1 affects the survival of cervical cancer cells, such as apoptosis, are still unclear. In this study, we found that the expression of Msi1 inhibited cervical cancer cell apoptosis in vitro and in vivo. Furthermore, the expression of Msi1 downregulated the expression of PTEN, while AKT signaling was activated, which resulted in a reduction in the proapoptotic protein BAK. In addition, rescue the expression of BAK in Msi1 expressing cervical cancer cells induced the increase of apoptosis cells. These findings indicate that Msi1 regulates cervical cancer cell apoptosis by inhibiting PTEN and activating AKT signaling, which leads to the downregulation of BAK.
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Affiliation(s)
- Xian Liu
- Department of Reproductive Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 710061 Xi'an, Shaanxi, PR China.,Section of Cancer Stem Cell Research, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of the People's Republic of China, 710061 Xi'an, Shaanxi, PR China
| | - Yanru Zhang
- Department of Reproductive Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 710061 Xi'an, Shaanxi, PR China.,Section of Cancer Stem Cell Research, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of the People's Republic of China, 710061 Xi'an, Shaanxi, PR China
| | - PengSheng Zheng
- Department of Reproductive Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 710061 Xi'an, Shaanxi, PR China.,Section of Cancer Stem Cell Research, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of the People's Republic of China, 710061 Xi'an, Shaanxi, PR China
| | - Nan Cui
- Department of Reproductive Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 710061 Xi'an, Shaanxi, PR China.,Section of Cancer Stem Cell Research, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of the People's Republic of China, 710061 Xi'an, Shaanxi, PR China
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Zhang H, Song Y, Feng C. Improvement of cerebral ischemia/reperfusion injury by daucosterol palmitate-induced neuronal apoptosis inhibition via PI3K/Akt/mTOR signaling pathway. Metab Brain Dis 2020; 35:1035-1044. [PMID: 32363473 DOI: 10.1007/s11011-020-00575-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 04/14/2020] [Indexed: 02/07/2023]
Abstract
Traditional Chinese medicine has growing importance in the treatment of ischemia stroke due to its abundance and low drug resistance. In this study, we aim to investigate the therapeutic potential of daucosterol palmitate against ischemia stroke, as well as its neuro-protective mechanism. The dose-response effects of daucosterol palmitate in the protection from brain damage were evaluated in a cerebral ischemia/reperfusion (I/R) rat model. The correlation of neuro-protective effects of daucosterol palmitate with apoptosis inhibition was examined and the possible signaling targets were identified. Our findings revealed that daucosterol palmitate treatment after 2 h' ischemia significantly lowered brain damage, and neuronal cell apoptosis caused by I/R injury in a dose-response mode (20, 40 and 80 mg/kg). Western blot analysis indicated that daucosterol palmitate could reverse the effects of I/R injury on protein expression of PI3K and mTOR, and phosphorylation of Akt. Contrarily, inactivation of PI3K using wortmannin dramatically antagonized the effect of daucosterol palmitate for I/R injury. With these findings, it supports the application potential of daucosterol palmitate in the treatment of ischemia stroke. Besides, the PI3K/Akt/mTOR pathway might be potential cellular targets for daucosterol palmitate.
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Affiliation(s)
- Huiyuan Zhang
- Department of Neurology, Liaocheng People's Hospital, Huashan road, NO 45, Liaocheng city, 252000, Shandong Province, China
| | - Yamin Song
- Department of Neurology, Liaocheng People's Hospital, Huashan road, NO 45, Liaocheng city, 252000, Shandong Province, China.
| | - Cong Feng
- Department of Surgery, Tumour Hospital of Liaocheng, Liaocheng city, 252000, Shandong, China
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