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Zhang A, Peng S, Sun S, Ye S, Zhao Y, Wu Q. NRBP1 promotes malignant phenotypes of glioblastoma by regulating PI3K/Akt activation. Cancer Med 2024; 13:e70100. [PMID: 39149873 PMCID: PMC11327863 DOI: 10.1002/cam4.70100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 07/31/2024] [Accepted: 08/01/2024] [Indexed: 08/17/2024] Open
Abstract
OBJECTIVES Glioblastoma (GBM) is the most aggressive of intracranial gliomas. Despite the maximal treatment intervention, the median survival rate is still about 14-16 months. Nuclear receptor-binding protein 1 (NRBP1) has a potential growth-promoting role on biology function of cells. In this study, we investigated whether NRBP1 promotes GBM malignant phenotypes and the potential mechanisms. METHODS The correlation between NRBP1 and glioma grade, prognosis in TCGA/CGGA databases and our clinical data were analyzed. Next, we conducted knockout and overexpression of NRBP1 on GBM cells to verify that NRBP1 promoted cell proliferation, invasion, and migration in vitro and in vivo. Finally, we detected the impact of NRBP1 on PI3K/Akt signaling pathway and EMT. RESULTS There was a correlation between elevated NRBP1 expression and advanced stage glioma, as well as decreased overall and disease-free survival. The suppression of proliferation, invasion, and migration of tumor cells was observed upon NRBP1 knockout, and in vitro studies also demonstrated the induction of apoptotic cell death. Whereas, its overexpression is associated with high multiplication rate, migration, invasion, and apoptotic escape. GO enrichment and KEGG analysis revealed that NRBP1 regulated differentially expressed gene clusters are involved in PI3K/Akt signaling pathway, as well as EMT mediated by this pathway. Moreover, the effects of NRBP1 knockdown and overexpression on GBM were mitigated by MK-2206 and SC79, both of which respectively function as an inhibitor and an activator of the PI3K/Akt signaling pathway. Similarly, the suppression of NRBP1 led to a decrease in tumor growth, whereas its overexpression promoted tumor growth in a mouse model. CONCLUSIONS This study shows that NRBP1 promotes malignant phenotypes in GBM by activating PI3K/Akt pathway. Hence, it can function as both a predictive indicator and a new target for therapies in GBM treatment.
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Affiliation(s)
- Anli Zhang
- Department of PathologyThe Second Affiliated Hospital of Anhui Medical UniversityHefeiChina
- Division of Life Sciences and Medicine, Department of Pathology, The First Affiliated Hospital of USTCUniversity of Science and Technology of ChinaHefeiChina
| | - Shichao Peng
- Teaching and Research Section of Nuclear Medicine, School of Basic Medical SciencesAnhui Medical UniversityHefeiChina
| | - Sibai Sun
- Division of Life Sciences and Medicine, Department of Pathology, The First Affiliated Hospital of USTCUniversity of Science and Technology of ChinaHefeiChina
| | - Shan Ye
- Division of Life Sciences and Medicine, Department of Pathology, The First Affiliated Hospital of USTCUniversity of Science and Technology of ChinaHefeiChina
| | - Ye Zhao
- Teaching and Research Section of Nuclear Medicine, School of Basic Medical SciencesAnhui Medical UniversityHefeiChina
| | - Qiang Wu
- Department of PathologyThe Second Affiliated Hospital of Anhui Medical UniversityHefeiChina
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2
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Cheng Y, Yang X, Liang L, Xin H, Dong X, Li W, Li J, Guo X, Li Y, He J, Zhang C, Wang W. Elevated expression of CXCL3 in colon cancer promotes malignant behaviors of tumor cells in an ERK-dependent manner. BMC Cancer 2023; 23:1162. [PMID: 38031087 PMCID: PMC10685652 DOI: 10.1186/s12885-023-11655-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 11/18/2023] [Indexed: 12/01/2023] Open
Abstract
BACKGROUND CXC chemokine ligand 3 (CXCL3) is a member of CXC-type chemokine family that is identified as a major regulator in immune and inflammation responses. Recently, numerous evidence indicated that CXCL3 is broadly expressed in various human tumor types, and it is also known to play a critical role in mediating tumor development and progression. However, the expression profile of CXCL3 and the exact molecular mechanism behind the role of CXCL3 in colon adenocarcinoma (COAD) has not been fully elucidated. METHODS The expression and clinical significance of CXCL3 mRNA and protein in the tissues from COAD patients were estimated using bioinformatics and immunohistochemistry assays. The expression and roles of exogenous administration or overexpression of CXCL3 in HT-29 and SW480 COAD cells were determined using enzyme-linked immunosorbent assay(ELISA), Cell Counting Kit-8 (CCK-8) and Transwell assays. Mechanically, CXCL3-induced malignant behaviors were elucidated using western blotting assay and extracellular signal-regulated protein kinase 1/2 (ERk1/2) inhibitor PD98059. RESULTS The cancer genome atlas (TCGA)-COAD data analysis revealed that CXCL3 mRNA is highly expressed and has high clinical diagnostic accuracy in COAD. Increased expression of CXCL3 mRNA was associated with patient's clinical stage, race, gender, age, histological subtype, nodal mestastasis and tumor protein 53 (TP53) mutation status. Similarly, immunohistochemistry assay also exhibited that CXCL3 protein in COAD tissues was significantly up-regulated. Gene expression associated assay implied that CXC chemokine ligand 1 (CXCL1) and CXC chemokine ligand 2 (CXCL2) were markedly correlated with CXCL3 in COAD. Protein-protein interaction (PPI) analysis revealed that cyclin B1 (CCNB1), mitotic arrest deficient 2 like 1 (MAD2L1), H2A family member Z (H2AFZ) and CXCL2 may be the important protein molecules involved in CXCL3-related tumor biology. Gene set enrichment analysis (GSEA) analysis revealed that CXCL3 was mainly enriched in the cell cycle, DNA replication, NOD-like receptors, NOTCH and transforming growth factor-β (TGF-β) Signal pathways. In vitro, exogenous administration or overexpression of CXCL3 resulted in increased malignant behaviors of HT-29 and SW480 cells, and down-regulation of CXCL3 expression inhibited the malignant behaviors of these tumor cells. In addition, overexpression of CXCL3 affected the expression of genes related to extracellular signal regulated kinase (ERK) pathway, including ERK1/2, p-ERK, B-cell lymphoma-2 (Bcl-2), Bcl-2-associated X protein (Bax) and Cyclin D1. Finally, CXCL3-induced malignant behaviors in HT-29 and SW480 cells were obviously attenuated following treatment with ERK inhibitor PD98059. CONCLUSION CXCL3 is upregulated in COAD and plays a crucial role in the control of malignant behaviors of tumor cells, which indicated its involvement in the pathogenesis of COAD.
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Grants
- Person in charge: Xinyan Yang; has been filed, the number to be issued. Basic scientific research business cost scientific research project of Heilongjiang Provincial Colleges and Universities in 2022
- Person in charge: Xinyan Yang; has been filed, the number to be issued. Basic scientific research business cost scientific research project of Heilongjiang Provincial Colleges and Universities in 2022
- Person in charge: Xinyan Yang; has been filed, the number to be issued. Basic scientific research business cost scientific research project of Heilongjiang Provincial Colleges and Universities in 2022
- Person in charge: Xinyan Yang; has been filed, the number to be issued. Basic scientific research business cost scientific research project of Heilongjiang Provincial Colleges and Universities in 2022
- Person in charge: Xinyan Yang; has been filed, the number to be issued. Basic scientific research business cost scientific research project of Heilongjiang Provincial Colleges and Universities in 2022
- LPHGRD2022-005 Open Project Program of Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education
- LPHGRD2022-005 Open Project Program of Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education
- LPHGRD2022-005 Open Project Program of Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education
- LPHGRD2022-005 Open Project Program of Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education
- LPHGRD2022-005 Open Project Program of Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education
- LPHGRD2022-005 Open Project Program of Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education
- LPHGRD2022-005 Open Project Program of Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education
- LPHGRD2022-005 Open Project Program of Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education
- 2022J01531 Natural Science Foundation of Fujian Province
- 2022J01531 Natural Science Foundation of Fujian Province
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Affiliation(s)
- Yao Cheng
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China
- Clinical Laboratory, Beidahuang Industry Group General Hospital, Harbin 150088, Heilongjiang, China
| | - Xinyan Yang
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China
| | - Lichun Liang
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China
| | - Hua Xin
- First Affiliated Hospital, Jiamusi University, Jiamusi 154002, Heilongjiang, China
| | - Xinyu Dong
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China
| | - Weidong Li
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China
| | - Jie Li
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China
| | - Xiaoli Guo
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China
| | - Yue Li
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China
| | - Jian He
- Department of Medical Technology, Collaborative Innovation Center for Translation Medical Testing and Application Technology Zhangzhou, Zhang Zhou Health Vocational College, Zhangzhou 363000, Fujian Province, China
| | - Chunbin Zhang
- Department of Medical Technology, Collaborative Innovation Center for Translation Medical Testing and Application Technology Zhangzhou, Zhang Zhou Health Vocational College, Zhangzhou 363000, Fujian Province, China.
| | - Weiqun Wang
- Basic Medical College, Jiamusi University, Jiamusi 154002, Heilongjiang, China.
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Chi F, Jin X, Chen L, He G, Han S. TRG16, targeted by miR-765, inhibits breast cancer stem cell-like properties via regulating the NF-κB pathway. Mol Cell Biochem 2022; 477:2801-2816. [PMID: 35648115 DOI: 10.1007/s11010-022-04480-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 05/13/2022] [Indexed: 12/24/2022]
Abstract
Previous studies reported that cancer stem cells (CSCs) might be responsible for drug resistance and cancer progression. Transformation-Related Gene 16 Protein (TRG16), a pseudokinase, was reported to be a suppressor in some types of cancer and its overexpression impaired hepatocellular carcinoma cell stemness. However, the function of TRG16 in BC remains unclear. We found that TRG16 expression was significantly downregulated in BC tissues compared with adjacent tissues (n = 40; P < 0.001) and BC patients with lower expression of TRG16 had a worse prognosis. Forced expression of TRG16 inhibited BC stem cell-like properties as evidenced by decreased CD44-positive cells (CSC marker), reduced mammosphere quantity, and downregulated Nanog, aldehyde dehydrogenase, octamer-binding transcription factor 4, and SRY-box transcription factor 2 expression (CSC markers). Moreover, TRG16 overexpression inhibited self-renewal and invasion capabilities of BC cells in vitro as well as tumor growth in vivo but increased cisplatin sensitivity. However, TRG16 silencing had the opposite effects. Further mechanistic studies revealed that TRG16 was targeted and negatively regulated by miR-765, a facilitator of BC progression. TRG16 could suppress the activation of the NF-κB pathway in BC cells, which is a positive pathway in BC progression and contributes to the maintenance of cancer cell stemness. In conclusion, the results above demonstrate that TRG16, negatively regulated by miR-765, may inhibit the BC progression by regulating BC stem cell-like properties and this inhibition may be mediated by the NF-κB pathway. Our findings indicate that TRG16 may be a potential therapeutic targetable node for BC. TRG16, negatively regulated by miR-765, may inhibit the BC progression through regulating BC stem cell-like properties and this inhibition may be mediated by the NF-κB pathway.
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Affiliation(s)
- Feng Chi
- Department of Oncology, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, Liaoning, China
| | - Xiaoming Jin
- Department of Endocrinology, Northern Theater Air Force Hospital of the People's Liberation Army, Shenyang, Liaoning, China
| | - Long Chen
- Department of Breast Surgery, Liaoning Cancer Hospital & Institute, Shenyang, Liaoning, China
| | - Guijin He
- Department of Oncology, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, Liaoning, China
| | - Sijia Han
- Department of Oncology, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, Liaoning, China.
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Microglial ERK-NRBP1-CREB-BDNF signaling in sustained antidepressant actions of (R)-ketamine. Mol Psychiatry 2022; 27:1618-1629. [PMID: 34819637 PMCID: PMC9095473 DOI: 10.1038/s41380-021-01377-7] [Citation(s) in RCA: 99] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/20/2021] [Accepted: 10/22/2021] [Indexed: 12/12/2022]
Abstract
(R,S)-ketamine elicits rapid-acting and sustained antidepressant actions in treatment-resistant patients with depression. (R)-ketamine produces longer-lasting antidepressant effects than (S)-ketamine in rodents; however, the precise molecular mechanisms underlying antidepressant actions of (R)-ketamine remain unknown. Using isobaric Tag for Relative and Absolute Quantification, we identified nuclear receptor-binding protein 1 (NRBP1) that could contribute to different antidepressant-like effects of the two enantiomers in chronic social defeat stress (CSDS) model. NRBP1 was localized in the microglia and neuron, not astrocyte, of mouse medial prefrontal cortex (mPFC). (R)-ketamine increased the expression of NRBP1, brain-derived neurotrophic factor (BDNF), and phosphorylated cAMP response element binding protein (p-CREB)/CREB ratio in primary microglia cultures thorough the extracellular signal-regulated kinase (ERK) activation. Furthermore, (R)-ketamine could activate BDNF transcription through activation of CREB as well as MeCP2 (methyl-CpG binding protein 2) suppression in microglia. Single intracerebroventricular (i.c.v.) injection of CREB-DNA/RNA heteroduplex oligonucleotides (CREB-HDO) or BDNF exon IV-HDO blocked the antidepressant-like effects of (R)-ketamine in CSDS susceptible mice. Moreover, microglial depletion by colony-stimulating factor 1 receptor (CSF1R) inhibitor PLX3397 blocked the antidepressant-like effects of (R)-ketamine in CSDS susceptible mice. In addition, inhibition of microglia by single i.c.v. injection of mannosylated clodronate liposomes (MCLs) significantly blocked the antidepressant-like effects of (R)-ketamine in CSDS susceptible mice. Finally, single i.c.v. injection of CREB-HDO, BDNF exon IV-HDO or MCLs blocked the beneficial effects of (R)-ketamine on the reduced dendritic spine density in the mPFC of CSDS susceptible mice. These data suggest a novel ERK-NRBP1-CREB-BDNF pathways in microglia underlying antidepressant-like effects of (R)-ketamine.
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Jung SY, Sobel EM, Pellegrini M, Yu H, Papp JC. Synergistic Effects of Genetic Variants of Glucose Homeostasis and Lifelong Exposures to Cigarette Smoking, Female Hormones, and Dietary Fat Intake on Primary Colorectal Cancer Development in African and Hispanic/Latino American Women. Front Oncol 2021; 11:760243. [PMID: 34692549 PMCID: PMC8529283 DOI: 10.3389/fonc.2021.760243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 09/22/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Disparities in cancer genomic science exist among racial/ethnic minorities. Particularly, African American (AA) and Hispanic/Latino American (HA) women, the 2 largest minorities, are underrepresented in genetic/genome-wide studies for cancers and their risk factors. We conducted on AA and HA postmenopausal women a genomic study for insulin resistance (IR), the main biologic mechanism underlying colorectal cancer (CRC) carcinogenesis owing to obesity. METHODS With 780 genome-wide IR-specific single-nucleotide polymorphisms (SNPs) among 4,692 AA and 1,986 HA women, we constructed a CRC-risk prediction model. Along with these SNPs, we incorporated CRC-associated lifestyles in the model of each group and detected the topmost influential genetic and lifestyle factors. Further, we estimated the attributable risk of the topmost risk factors shared by the groups to explore potential factors that differentiate CRC risk between these groups. RESULTS In both groups, we detected IR-SNPs in PCSK1 (in AA) and IFT172, GCKR, and NRBP1 (in HA) and risk lifestyles, including long lifetime exposures to cigarette smoking and endogenous female hormones and daily intake of polyunsaturated fatty acids (PFA), as the topmost predictive variables for CRC risk. Combinations of those top genetic- and lifestyle-markers synergistically increased CRC risk. Of those risk factors, dietary PFA intake and long lifetime exposure to female hormones may play a key role in mediating racial disparity of CRC incidence between AA and HA women. CONCLUSIONS Our results may improve CRC risk prediction performance in those medically/scientifically underrepresented groups and lead to the development of genetically informed interventions for cancer prevention and therapeutic effort, thus contributing to reduced cancer disparities in those minority subpopulations.
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Affiliation(s)
- Su Yon Jung
- Translational Sciences Section, Jonsson Comprehensive Cancer Center, School of Nursing, University of California, Los Angeles, Los Angeles, CA, United States
| | - Eric M. Sobel
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
- Department of Computational Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Matteo Pellegrini
- Department of Molecular, Cell and Developmental Biology, Life Sciences Division, University of California, Los Angeles, Los Angeles, CA, United States
| | - Herbert Yu
- Cancer Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, United States
| | - Jeanette C. Papp
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
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Du L, Zhang L, Sun F. Puerarin Inhibits the Progression of Bladder Cancer by Regulating circ_0020394/ miR-328-3p/ NRBP1 Axis. Cancer Biother Radiopharm 2020; 37:435-450. [PMID: 33016781 DOI: 10.1089/cbr.2019.3382] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Background: Previous studies have shown puerarin to be a potential therapeutic drug for treatment of bladder cancer. But the role and possible molecular mechanism of puerarin remain unknown. Methods: Cell viability, apoptosis, migration, and invasion were assessed by Cell Counting Kit-8 (CCK-8), flow cytometry, and transwell assays, respectively. Western blot was used to measure the levels of all protein. Glucose consumption and lactate production were detected using a glucose and lactate assay kit. Circular RNA_0020394 (circ_0020394), microRNA-328-3p (miR-328-3p), and nuclear receptor binding protein 1 (NRBP1) levels were measured by quantitative real-time polymerase chain reaction (qRT-PCR). The interaction between miRNA and circRNA or mRNA was confirmed using dual-luciferase reporter assay. In vivo experiments were performed to examine the effect of puerarin on tumor growth. Results: Puerarin suppressed cell viability, migration, invasion, and glycolysis, and induced apoptosis in bladder cancer. circ_0020394 was downregulated in puerarin-treated bladder cancer cells, and circ_0020394 overexpression attenuated the inhibitory effect of puerarin on cell progression. Moreover, circ_0020394 could bind to miR-328-3p, and miR-328-3p directly targeted NRBP1. Functionally, miR-328-3p could reverse the promotion effect of circ_0020394 overexpression on the progression of puerarin-treated cells, and silencing NRBP1 counteracted the effects of anti-miR-328-3p on puerarin-treated cells. Mechanically, circ_0020394 could increase NRBP1 expression by acting as miR-328-3p sponge in puerarin-treated bladder cancer cells. Besides, puerarin inhibited tumorigenesis in vivo by increasing miR-328-3p and decreasing the levels of circ_0020394 and NRBP1. Conclusions: Puerarin impedes cell viability, migration, invasion, and glycolysis, and promoted apoptosis in bladder cancer by regulating circ_0020394/miR-328-3p/NRBP1 axis.
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Affiliation(s)
- Lijun Du
- Department of Traditional Chinese Medicine, Yantai Hospital of Traditional Chinese Medicine, Yantai, China
| | - Li Zhang
- Department of Traditional Chinese Medicine, Yantai Hospital of Traditional Chinese Medicine, Yantai, China
| | - Fei Sun
- Department of Inpatient Dispensary, Yantai Hospital of Traditional Chinese Medicine, Yantai, China
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Nuclear Receptor Binding Protein 2 Is Downregulated in Medulloblastoma, and Reduces Tumor Cell Survival upon Overexpression. Cancers (Basel) 2020; 12:cancers12061483. [PMID: 32517178 PMCID: PMC7352854 DOI: 10.3390/cancers12061483] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/01/2020] [Accepted: 06/04/2020] [Indexed: 01/24/2023] Open
Abstract
Pseudokinases, comprising 10% of the human kinome, are emerging as regulators of canonical kinases and their functions are starting to be defined. We previously identified the pseudokinase Nuclear Receptor Binding Protein 2 (NRBP2) in a screen for genes regulated during neural differentiation. During mouse brain development, NRBP2 is expressed in the cerebellum, and in the adult brain, mainly confined to specific neuronal populations. To study the role of NRBP2 in brain tumors, we stained a brain tumor tissue array for NRPB2, and find its expression to be low, or absent, in a majority of the tumors. This includes medulloblastoma (MB), a pediatric tumor of the cerebellum. Using database mining of published MB data sets, we also find that NRBP2 is expressed at a lower level in MB than in the normal cerebellum. Recent studies indicate that MB exhibits frequent epigenetic alternations and we therefore treated MB cell lines with drugs inhibiting DNA methylation or histone deacetylation, which leads to an upregulation of NRBP2 mRNA expression, showing that it is under epigenetic regulation in cultured MB cells. Furthermore, forced overexpression of NRBP2 in MB cell lines causes a dramatic decrease in cell numbers, increased cell death, impaired cell migration and inhibited cell invasion in vitro. Taken together, our data indicate that downregulation of NRBP2 may be a feature by which MB cells escape growth regulation.
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Hwang J, Haque MA, Suzuki H, Dijke PT, Kato M. THG-1 suppresses SALL4 degradation to induce stemness genes and tumorsphere formation through antagonizing NRBP1 in squamous cell carcinoma cells. Biochem Biophys Res Commun 2019; 523:307-314. [PMID: 31864704 DOI: 10.1016/j.bbrc.2019.11.149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 11/22/2019] [Indexed: 01/09/2023]
Abstract
Knockdown of THG-1 in TE13 esophageal squamous cell carcinoma (ESCC) cells is known to suppress tumorsphere growth. THG-1 was identified as an NRBP1 binding protein, and NRBP1 was reported to downregulate an stemness-related transcriptional factor SALL4, so we decided to examine the possibility that tumorigenic function of THG-1 is achieved by the competition to the tumor-suppressive function of NRBP1. SALL4 was decreased in THG-1 deficient TE13 cells with reduced tumorsphere formation, while exogenous SALL4 expression in THG-1 deficient TE13 cells recovered expression of stemness genes (NANOG and OCT4) and partially, but significantly, recovered tumorsphere formation ability. Additionally, we found that NRBP1 induced ubiquitination of SALL4, and THG-1 interrupted the ubiquitination of SALL4 by antagonizing NRBP1 binding to SALL4. These results suggest that THG-1 promotes tumorsphere growth of ESCC cells by the stabilization of SALL4 protein and induction of the target stemness genes through competitive binding to NRBP1.
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Affiliation(s)
- Jongchan Hwang
- School of Integrative and Global Majors, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Md Anwarul Haque
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan; Department of Pharmacy, University of Rajshahi, Rajshai, 6205, Bangladesh
| | - Hiroyuki Suzuki
- Department of Experimental Pathology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Peter Ten Dijke
- Department of Cell and Chemical Biology and Oncode Institute, Leiden University Medical Center, the Netherlands; Department of Cancer Signaling, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Mitsuyasu Kato
- Department of Experimental Pathology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan; Transborder Medical Research Center, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
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Wu Q, Zhou X, Li P, Wang W, Wang J, Tan M, Tao L, Qiu J. High NRBP1 expression promotes proliferation and correlates with poor prognosis in bladder cancer. J Cancer 2019; 10:4270-4277. [PMID: 31413746 PMCID: PMC6691704 DOI: 10.7150/jca.32656] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Accepted: 05/12/2019] [Indexed: 01/05/2023] Open
Abstract
Nuclear receptor binding protein 1 (NRBP1) is an evolutionarily highly conserved adaptor protein with multiple domains. Recently, its role in cancers has received increasing attention. To investigate whether NRBP1 is involved in the development of bladder cancer, we used tissue microarray and analyzed the association between the expression levels of NRBP1 and clinico-pathological features of 56 patients diagnosed with bladder cancer. Subsequently, NRBP1 was silenced using siRNA in bladder cancer cell lines T24 and 5637, and cell phenotype such as proliferation and apoptosis were observed. Further, in vivo tumor formation assay was performed. The expression of apoptosis markers was detected by Western blot. A significant positive correlation between increased NRBP1 expression and tumor stage, and lymph node metastasis was observed in 56 patients. High expression of NRBP1 was associated with poor prognosis and NRBP1 knockdown significantly inhibited cell proliferation and induced intrinsic apoptosis in vitro. Moreover, we also found that NRBP1 knockdown significantly suppress tumor growth in xenograft mouse model. Taken together, these data suggest that NRBP1 plays a critical role in the development of bladder cancer and may represent a potential target for bladder cancer treatment.
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Affiliation(s)
- Qi Wu
- Department of Urology, Shanghai General Hospital of Nanjing Medical University, Shanghai 200080, China.,Department of Urology, The Sixth Affiliated Hospital of Wenzhou Medical University (The People's Hospital of Lishui), Zhejiang 323000, P. R. China
| | - Xiaoqing Zhou
- Department of Urology, The Sixth Affiliated Hospital of Wenzhou Medical University (The People's Hospital of Lishui), Zhejiang 323000, P. R. China
| | - Peng Li
- Department of Urology, The Sixth Affiliated Hospital of Wenzhou Medical University (The People's Hospital of Lishui), Zhejiang 323000, P. R. China
| | - Wei Wang
- Department of Urology, The Fourth Affiliated Hospital of Nantong University (Yancheng First People's Hospital), Jiangsu 224000, P. R. China
| | - Jun Wang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P. R. China
| | - Mingyue Tan
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P. R. China
| | - Le Tao
- Department of Urology, Shanghai General Hospital of Nanjing Medical University, Shanghai 200080, China
| | - Jianxin Qiu
- Department of Urology, Shanghai General Hospital of Nanjing Medical University, Shanghai 200080, China
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Nuclear receptor binding protein 1 correlates with better prognosis and induces caspase-dependent intrinsic apoptosis through the JNK signalling pathway in colorectal cancer. Cell Death Dis 2018; 9:436. [PMID: 29567997 PMCID: PMC5864759 DOI: 10.1038/s41419-018-0402-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 02/13/2018] [Accepted: 02/14/2018] [Indexed: 02/08/2023]
Abstract
Nuclear receptor binding protein 1 (NRBP1) is a ubiquitously expressed and highly conserved pseudokinase that has important roles in cellular homoeostasis. Despite recent advances in understanding the biology of NRBP1, the role of NRBP1 and its underlying mechanism in colorectal cancer (CRC) have not been fully elucidated. In the present study, we observed that NRBP1 expression levels were significantly reduced in CRC tissues compared with corresponding adjacent normal tissues, and high NRBP1 expression correlated with better prognosis in CRC. Overexpression of NRBP1 inhibited CRC cell proliferation and promoted apoptosis in vitro and in vivo. In contrast, knockdown of NRBP1 expression increased cell proliferation and decreased the percentage of apoptotic cells. Moreover, overexpression of NRBP1 activated caspase-dependent intrinsic apoptosis. In addition, we further discovered that NRBP1 regulated the apoptotic pathway through interaction with JNK. Finally, NRBP1 overexpression led to attenuated CRC growth in a xenograft mouse model. Our study illustrates the suppressor role of NRBP1 in CRC and provides a potential therapeutic target.
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Li X, Chen X, Jiang J, Yang S, Gao Y. NRBP2 Overexpression Inhibits Cell Proliferation and Migration and Increases Cisplatin Sensitivity in Intrahepatic Cholangiocarcinoma. Technol Cancer Res Treat 2017. [PMCID: PMC5762097 DOI: 10.1177/1533034617747174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Aims: Methods: Results: Conclusions:
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Affiliation(s)
- Xiaopeng Li
- Department of Ultrasonography, The Second Affiliated Hospital, Xi’an Jiaotong University, Xi’an, China
| | - Xin Chen
- Department of Radiology, The Second Affiliated Hospital, Xi’an Jiaotong University, Xi’an, China
| | - Jue Jiang
- Department of Ultrasonography, The Second Affiliated Hospital, Xi’an Jiaotong University, Xi’an, China
| | - Shuanying Yang
- Department of Respiratory Medicine, The Second Affiliated Hospital, Xi’an Jiaotong University, Xi’an, China
| | - Ya Gao
- Department of Pediatric Surgery, The Second Affiliated Hospital, Xi’an Jiaotong University, Xi’an, China
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Zhang L, Ge C, Zhao F, Zhang Y, Wang X, Yao M, Li J. NRBP2 Overexpression Increases the Chemosensitivity of Hepatocellular Carcinoma Cells via Akt Signaling. Cancer Res 2016; 76:7059-7071. [PMID: 27634758 DOI: 10.1158/0008-5472.can-16-0937] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 07/24/2016] [Accepted: 08/08/2016] [Indexed: 12/22/2022]
Abstract
Hepatocellular carcinoma is highly resistant to chemotherapy. Research data supported that cancer stem cells (CSC) may be responsible for the chemoresistance and strategies that suppress CSCs stemness could also inhibit the drug resistance. In this study, we found that nuclear receptor binding protein 2 (NRBP2) expression was downregulated in the CD133+ hepatocellular carcinoma CSCs. Most adjacent noncancerous liver tissue analyzed expressed higher level of NRBP2 compared with cancerous tissue in hepatocellular carcinoma patients, and high NRBP2 expression indicated a better prognosis. Real-time PCR results showed that NRBP2 negatively correlated with stemness-related genes, including Oct3/4, Nanog, Notch1, Ep300, and CD133 mRNA expression. High NRBP2 expression in hepatocellular carcinoma cells downregulated CK19 protein expression, inhibited tumorsphere formation, and tumorigenesis ability, indicating that high NRBP2 expression restrains the hepatocellular carcinoma cell stemness. Overexpression of NRBP2 reduced the IC50 of sorafenib in hepatocellular carcinoma cells, and NRBP2 expression was negatively correlated with hepatocellular carcinoma cell resistance to the chemotherapy agents, including cisplatin and the Akt signaling inhibitor perifosine. Coimmunoprecipitation results showed that NRBP2 could bind with Annexin A2 (ANXA2) and inhibit ANXA2 expression. Coexpression of ANXA2 restored the chemoresistant ability in NRBP2-overexpressing hepatocellular carcinoma cells. Further analysis showed that NRBP2 downregulated Akt and its downstream signaling target Bad phosphorylation level. ANXA2 coexpression partially restored the Akt phosphorylation. Analysis of the expression of Bcl2 family proteins showed that NRBP2 may increase hepatocellular carcinoma cell chemosensitivity by regulating expression of survival proteins involved in the Akt and Bcl2 pathway. These results suggest that NRBP2 plays an important role in the tumor progression and chemotherapeutic resistance of hepatocellular carcinoma. Cancer Res; 76(23); 7059-71. ©2016 AACR.
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Affiliation(s)
- Lixing Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Chao Ge
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Fangyu Zhao
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yang Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xin Wang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ming Yao
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jinjun Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
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Abstract
Recent studies suggest that a small subset of cells within a tumor, the so-called cancer stem cells (CSCs), are responsible for tumor propagation, relapse, and the eventual death of most cancer patients. CSCs may derive from a few tumor-initiating cells, which are either transformed normal stem cells or reprogrammed differentiated cells after acquiring initial cancer-causing mutations. CSCs and normal stem cells share some properties, but CSCs differ from normal stem cells in their tumorigenic ability. Notably, CSCs are usually resistant to chemo- and radiation therapies. Despite the apparent roles of CSCs in human cancers, the biology underlying their behaviors remains poorly understood. Over the past few years, studies in Drosophila have significantly contributed to this new frontier of cancer research. Here, we first review how stem-cell tumors are initiated and propagated in Drosophila, through niche appropriation in the posterior midgut and through stem-cell competition for niche occupancy in the testis. We then discuss the differences between normal and tumorigenic stem cells, revealed by studying RasV12-transformed stem-cell tumors in the Drosophila kidney. Finally, we review the biology behind therapy resistance, which has been elucidated through studies of stem-cell resistance and sensitivity to death inducers using female germline stem cells and intestinal stem cells of the posterior midgut. We expect that screens using adult Drosophila neoplastic stem-cell tumor models will be valuable for identifying novel and effective compounds for treating human cancers.
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CXCL3 contributes to CD133(+) CSCs maintenance and forms a positive feedback regulation loop with CD133 in HCC via Erk1/2 phosphorylation. Sci Rep 2016; 6:27426. [PMID: 27255419 PMCID: PMC4891684 DOI: 10.1038/srep27426] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 05/09/2016] [Indexed: 12/25/2022] Open
Abstract
Although the chemotactic cytokine CXCL3 is thought to play an important role in tumor initiation and invasion, little is known about its function in hepatocellular carcinoma (HCC). In our previous study, we found that Ikaros inhibited CD133 expression via the MAPK pathway in HCC. Here, we showed that Ikaros may indirectly down-regulate CXCL3 expression in HCC cells, which leads to better outcomes in patients with CD133+ cancer stem cell (CSC) populations. CD133 overexpression induced CXCL3 expression, and silencing of CD133 down-regulated CXCL3 in HCC cells. Knockdown of CXCL3 inhibited CD133+ HCC CSCs’ self-renewal and tumorigenesis. The serum CXCL3 level was higher in HCC patients’ samples than that in healthy individual. HCC patients with higher CXCL3 expression displayed a poor prognosis, and a high level of CXCL3 was significantly associated with vascular invasion and tumor capsule formation. Exogenous CXCL3 induced Erk1/2 and ETS1 phosphorylation and promoted CD133 expression, indicating a positive feedback loop between CXCL3 and CD133 gene expression in HCC cells via Erk1/2 activation. Together, our findings indicated that CXCL3 might be a potent therapeutic target for HCC.
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The novel tumour suppressor Madm regulates stem cell competition in the Drosophila testis. Nat Commun 2016; 7:10473. [PMID: 26792023 PMCID: PMC4736159 DOI: 10.1038/ncomms10473] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 12/16/2015] [Indexed: 12/21/2022] Open
Abstract
Stem cell competition has emerged as a mechanism for selecting fit stem cells/progenitors and controlling tumourigenesis. However, little is known about the underlying molecular mechanism. Here we identify Mlf1-adaptor molecule (Madm), a novel tumour suppressor that regulates the competition between germline stem cells (GSCs) and somatic cyst stem cells (CySCs) for niche occupancy. Madm knockdown results in overexpression of the EGF receptor ligand vein (vn), which further activates EGF receptor signalling and integrin expression non-cell autonomously in CySCs to promote their overproliferation and ability to outcompete GSCs for niche occupancy. Conversely, expressing a constitutively activated form of the Drosophila JAK kinase (hopTum−l) promotes Madm nuclear translocation, and suppresses vn and integrin expression in CySCs that allows GSCs to outcompete CySCs for niche occupancy and promotes GSC tumour formation. Tumour suppressor-mediated stem cell competition presented here could be a mechanism of tumour initiation in mammals. Stem cell competition mediates the balance between tissue homeostasis and tumour formation, but how this occurs is unclear. Here, Singh et al. show that the tumour suppressor Mlfl-adaptor molecule regulates the balance between germline stem cell and somatic cyst stem cell growth in the Drosophila testis niche.
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Chandrani P, Upadhyay P, Iyer P, Tanna M, Shetty M, Raghuram GV, Oak N, Singh A, Chaubal R, Ramteke M, Gupta S, Dutt A. Integrated genomics approach to identify biologically relevant alterations in fewer samples. BMC Genomics 2015; 16:936. [PMID: 26572163 PMCID: PMC4647579 DOI: 10.1186/s12864-015-2138-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 10/23/2015] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Several statistical tools have been developed to identify genes mutated at rates significantly higher than background, indicative of positive selection, involving large sample cohort studies. However, studies involving smaller sample sizes are inherently restrictive due to their limited statistical power to identify low frequency genetic variations. RESULTS We performed an integrated characterization of copy number, mutation and expression analyses of four head and neck cancer cell lines - NT8e, OT9, AW13516 and AW8507 - by applying a filtering strategy to prioritize for genes affected by two or more alterations within or across the cell lines. Besides identifying TP53, PTEN, HRAS and MET as major altered HNSCC hallmark genes, this analysis uncovered 34 novel candidate genes altered. Of these, we find a heterozygous truncating mutation in Nuclear receptor binding protein, NRBP1 pseudokinase gene, identical to as reported in other cancers, is oncogenic when ectopically expressed in NIH-3 T3 cells. Knockdown of NRBP1 in an oral carcinoma cell line bearing NRBP1 mutation inhibit transformation and survival of the cells. CONCLUSIONS In overall, we present the first comprehensive genomic characterization of four head and neck cancer cell lines established from Indian patients. We also demonstrate the ability of integrated analysis to uncover biologically important genetic variation in studies involving fewer or rare clinical specimens.
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Affiliation(s)
- Pratik Chandrani
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Pawan Upadhyay
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Prajish Iyer
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Mayur Tanna
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Madhur Shetty
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Gorantala Venkata Raghuram
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Ninad Oak
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Ankita Singh
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Rohan Chaubal
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Manoj Ramteke
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
| | - Sudeep Gupta
- Department of Medical Oncology, Tata Memorial Hospital, Tata Memorial Center, Mumbai, Maharashtra, India.
| | - Amit Dutt
- Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Center, Navi Mumbai, Maharashtra, 410210, India.
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Nuclear receptor-binding protein 1: a novel tumour suppressor and pseudokinase. Biochem Soc Trans 2013; 41:1055-60. [PMID: 23863178 DOI: 10.1042/bst20130069] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Pseudokinases are a class of kinases which are structurally designated as lacking kinase activity. Despite the lack of kinase domain sequence conservation, there is increasing evidence that a number of pseudokinases retain kinase activity and/or have critical cellular functions, casting aside previous notions that pseudokinases simply exist as redundant kinases. Moreover, a number of recent studies have implicated pseudokinases as critical components in cancer formation and progression. The present review discusses the interactions and potential functions that nuclear receptor-binding protein 1, a pseudokinase recently described to have a tumour-suppressive role in cancer, may play in cellular homoeostasis and protein regulation. The recent findings highlighted in the present review emphasize the requirement to fully determine the function of pseudokinases in vitro and in vivo, the understanding of which may ultimately uncover new directions for drug discovery.
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Ruiz C, Oeggerli M, Germann M, Gluderer S, Stocker H, Andreozzi M, Thalmann GN, Cecchini MG, Zellweger T, Stürm S, Koivisto PA, Helin HJ, Gelmann EP, Glass AG, Gasser TC, Terracciano LM, Bachmann A, Wyler S, Bubendorf L, Rentsch CA. High NRBP1 expression in prostate cancer is linked with poor clinical outcomes and increased cancer cell growth. Prostate 2012; 72:1678-87. [PMID: 22473923 DOI: 10.1002/pros.22521] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Accepted: 03/05/2012] [Indexed: 11/11/2022]
Abstract
BACKGROUND We recently established the rationale that NRBP1 (nuclear receptor binding protein 1) has a potential growth-promoting role in cell biology. NRBP1 interacts directly with TSC-22, a potential tumor suppressor gene that is differently expressed in prostate cancer. Consequently, we analyzed the role of NRBP1 expression in prostate cancer cell lines and its expression on prostate cancer tissue microarrays (TMA). METHODS The effect of NRBP1 expression on tumor cell growth was analyzed by using RNAi. NRBP1 protein expression was evaluated on two TMAs containing prostate samples from more than 1,000 patients. Associations with clinico-pathological features, the proliferation marker Ki67 and survival data were analyzed. RESULTS RNAi mediated silencing of NRBP1 expression in prostate cancer cell lines resulted in reduced cell growth (P < 0.05). TMA analysis revealed NRBP1 protein expression in benign prostate hyperplasia in 6% as compared to 60% in both, high-grade intraepithelial neoplasia and prostate cancer samples. Strong NRBP1 protein expression was restricted to prostate cancer and correlated with higher expression of the proliferation marker Ki67 (P < 0.05). Further, patients with strong NRBP1 protein expression showed poor clinical outcomes (P < 0.05). Analysis of matched localized cancer tissues before and after castration revealed that post-therapy-related repression of NRBP1 expression was significantly associated with better overall survival. CONCLUSIONS We demonstrate that expression of NRBP1 is up-regulated during the progression of prostate cancer and that high NRBP1 expression is linked with poor prognosis and enhanced tumor cell growth.
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Affiliation(s)
- Christian Ruiz
- Institute for Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
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Wilson CH, Crombie C, van der Weyden L, Poulogiannis G, Rust AG, Pardo M, Gracia T, Yu L, Choudhary J, Poulin GB, McIntyre RE, Winton DJ, March HN, Arends MJ, Fraser AG, Adams DJ. Nuclear receptor binding protein 1 regulates intestinal progenitor cell homeostasis and tumour formation. EMBO J 2012; 31:2486-97. [PMID: 22510880 PMCID: PMC3365428 DOI: 10.1038/emboj.2012.91] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Accepted: 03/06/2012] [Indexed: 01/02/2023] Open
Abstract
Genetic screens in simple model organisms have identified many of the key components of the conserved signal transduction pathways that are oncogenic when misregulated. Here, we identify H37N21.1 as a gene that regulates vulval induction in let-60(n1046gf), a strain with a gain-of-function mutation in the Caenorhabditis elegans Ras orthologue, and show that somatic deletion of Nrbp1, the mouse orthologue of this gene, results in an intestinal progenitor cell phenotype that leads to profound changes in the proliferation and differentiation of all intestinal cell lineages. We show that Nrbp1 interacts with key components of the ubiquitination machinery and that loss of Nrbp1 in the intestine results in the accumulation of Sall4, a key mediator of stem cell fate, and of Tsc22d2. We also reveal that somatic loss of Nrbp1 results in tumourigenesis, with haematological and intestinal tumours predominating, and that nuclear receptor binding protein 1 (NRBP1) is downregulated in a range of human tumours, where low expression correlates with a poor prognosis. Thus NRBP1 is a conserved regulator of cell fate, that plays an important role in tumour suppression.
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Affiliation(s)
- Catherine H Wilson
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - Catriona Crombie
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | | | - George Poulogiannis
- Division of Signal Transduction, Beth Israel Deaconess Medical Center and Department of Systems Biology, Harvard Medical School, Boston, MA, USA
| | - Alistair G Rust
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - Mercedes Pardo
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - Tannia Gracia
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - Lu Yu
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - Jyoti Choudhary
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - Gino B Poulin
- Faculty of Life Sciences, University of Manchester, Manchester, UK
| | - Rebecca E McIntyre
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | | | - H Nikki March
- Cancer Research UK Cambridge Research Institute, Cambridge, UK
| | - Mark J Arends
- Department of Pathology, Addenbrookes Hospital, University of Cambridge, Cambridge, UK
| | - Andrew G Fraser
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
- The Donnelly Centre, University of Toronto, Toronto, Canada
| | - David J Adams
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
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Gluderer S, Brunner E, Germann M, Jovaisaite V, Li C, Rentsch CA, Hafen E, Stocker H. Madm (Mlf1 adapter molecule) cooperates with Bunched A to promote growth in Drosophila. J Biol 2010; 9:9. [PMID: 20149264 PMCID: PMC2871527 DOI: 10.1186/jbiol216] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2009] [Revised: 12/08/2009] [Accepted: 12/22/2009] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND The TSC-22 domain family (TSC22DF) consists of putative transcription factors harboring a DNA-binding TSC-box and an adjacent leucine zipper at their carboxyl termini. Both short and long TSC22DF isoforms are conserved from flies to humans. Whereas the short isoforms include the tumor suppressor TSC-22 (Transforming growth factor-beta1 stimulated clone-22), the long isoforms are largely uncharacterized. In Drosophila, the long isoform Bunched A (BunA) acts as a growth promoter, but how BunA controls growth has remained obscure. RESULTS In order to test for functional conservation among TSC22DF members, we expressed the human TSC22DF proteins in the fly and found that all long isoforms can replace BunA function. Furthermore, we combined a proteomics-based approach with a genetic screen to identify proteins that interact with BunA. Madm (Mlf1 adapter molecule) physically associates with BunA via a conserved motif that is only contained in long TSC22DF proteins. Moreover, Drosophila Madm acts as a growth-promoting gene that displays growth phenotypes strikingly similar to bunA phenotypes. When overexpressed, Madm and BunA synergize to increase organ growth. CONCLUSIONS The growth-promoting potential of long TSC22DF proteins is evolutionarily conserved. Furthermore, we provide biochemical and genetic evidence for a growth-regulating complex involving the long TSC22DF protein BunA and the adapter molecule Madm.
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Affiliation(s)
- Silvia Gluderer
- Institute of Molecular Systems Biology, ETH Zurich, Wolfgang-Pauli-Strasse 16, 8093 Zurich, Switzerland
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Larsson J, Forsberg M, Brännvall K, Zhang XQ, Enarsson M, Hedborg F, Forsberg-Nilsson K. Nuclear receptor binding protein 2 is induced during neural progenitor differentiation and affects cell survival. Mol Cell Neurosci 2008; 39:32-9. [DOI: 10.1016/j.mcn.2008.05.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2007] [Revised: 04/22/2008] [Accepted: 05/17/2008] [Indexed: 12/22/2022] Open
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Mahrour N, Redwine WB, Florens L, Swanson SK, Martin-Brown S, Bradford WD, Staehling-Hampton K, Washburn MP, Conaway RC, Conaway JW. Characterization of Cullin-box Sequences That Direct Recruitment of Cul2-Rbx1 and Cul5-Rbx2 Modules to Elongin BC-based Ubiquitin Ligases. J Biol Chem 2008; 283:8005-13. [DOI: 10.1074/jbc.m706987200] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Elkins MB, Henry JJ. Isolation and characterization of a novel gene, xMADML, involved in Xenopus laevis eye development. Dev Dyn 2006; 235:1845-57. [PMID: 16607642 DOI: 10.1002/dvdy.20824] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
We have identified Xenopus MADM-like (xMADML), a Xenopus laevis gene related to the murine MADM and the human NRBP genes. xMADML is expressed throughout early development and is expressed most strongly in the developing lens and more weakly in the retina and other anterior tissues. We demonstrate that disruption of xMADML translation by means of morpholino injection results in impaired retina and lens development. Reciprocal transplantation of the presumptive lens ectoderm between morpholino-injected embryos and those injected solely with a dextran lineage tracer demonstrates that xMADML is necessary in both the lens and the retina for correct development of these eye tissues. Analysis of gene expression after knockdown of xMADML revealed significant alterations in the expression of some genes, including Pax6, xSix3, Sox2, and Sox3, suggesting that xMADML plays a role in regulating gene expression during development of the eye. This investigation is the first in vivo study examining the developmental role of this novel gene and reveals an important role of xMADML in eye tissue development and differentiation.
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Affiliation(s)
- Matthew B Elkins
- Department of Cell and Developmental Biology and College of Medicine, University of Illinois, Urbana, Illinois, USA
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Wang H, Sun X, Luo Y, Lin Z, Wu J. Adapter protein NRBP associates with Jab1 and negatively regulates AP-1 activity. FEBS Lett 2006; 580:6015-21. [PMID: 17052710 DOI: 10.1016/j.febslet.2006.10.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Revised: 09/14/2006] [Accepted: 10/05/2006] [Indexed: 10/24/2022]
Abstract
Jun activation domain-binding protein 1 (Jab1) is a coactivator of activating protein-1 (AP-1) and is the fifth component of the COP9 signalosome complex. It interacts with a variety of proteins and plays important roles in diverse signaling pathways and cellular function including oncogenesis. We show here that Jab1 interacts in vivo with nuclear receptor binding protein (NRBP), an evolutionarily conserved adapter protein with a kinase-like domain. We further show that NRBP inhibits Jab1-induced phosphorylation of c-Jun and AP-1 activation. Finally, overexpression of NRBP in mammalian cells specifically inhibits AP-1 activation by various stimuli. Taken together, our data suggest that NRBP may be an important negative regulator of Jab1-mediated functions such as gene transcription and tumor progression.
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Affiliation(s)
- Hui Wang
- Department of Life Science and Biotechnology, Shanghai Jiaotong University, 1954 Huashan Road, Shanghai 200030, China
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Demoulin JB, Enarsson M, Larsson J, Essaghir A, Heldin CH, Forsberg-Nilsson K. The gene expression profile of PDGF-treated neural stem cells corresponds to partially differentiated neurons and glia. Growth Factors 2006; 24:184-96. [PMID: 17079202 DOI: 10.1080/08977190600696430] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We have previously shown that platelet-derived growth factor AA (PDGF-AA) stimulates the expansion of neuronal progenitors from neural stem cells, but is unable to replace fibroblast-growth factor 2 (FGF-2) as a stem cell mitogen. In the present study, we compared gene expression in neural stem cells that were grown in the presence of FGF-2 and in cells cultured with PDGF-AA or in the absence of growth factor, which induces differentiation. The genetic program elicited by PDGF-AA (156 significantly regulated genes) was not unique, but an intermediate between the ones of FGF-2-cultured stem cells and differentiated cells. These observations are compatible with the hypothesis that PDGF-AA induces a partial differentiation of neural stem cells, which retain the ability to proliferate, rather than acting solely as an instructing agent for neuronal differentiation. Finally, the transcriptional signature of stem cells grown with FGF-2 included a large number of genes over-expressed in gliomas and a core set of conserved genes periodically expressed during the eukaryote cell cycle.
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Affiliation(s)
- Jean-Baptiste Demoulin
- MEXP Unit, Christian de Duve Institute of Cellular Pathology, Université catholique de Louvain, B-1200 Brussels, Belgium.
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Chua JJE, Ng MML, Chow VTK. The non-structural 3 (NS3) protein of dengue virus type 2 interacts with human nuclear receptor binding protein and is associated with alterations in membrane structure. Virus Res 2004; 102:151-63. [PMID: 15084397 DOI: 10.1016/j.virusres.2004.01.025] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2003] [Revised: 01/19/2004] [Accepted: 01/19/2004] [Indexed: 11/18/2022]
Abstract
Flaviviral infections produce a distinct array of virus-induced intracellular membrane alterations that are associated with the flaviviral replication machinery. Currently, it is still unknown which flaviviral protein(s) is/are responsible for this induction. Using yeast two-hybrid and co-immunoprecipitation analyses, we demonstrated that the NS3 protein of dengue virus type 2 interacted specifically with nuclear receptor binding protein (NRBP), a host cellular protein that influences trafficking between the endoplasmic reticulum (ER) and Golgi, and that interacts with Rac3, a member of the Rho-GTPase family. Co-expression of NS3 and NRBP in baby hamster kidney cells exhibited significant subcellular co-localization, and revealed the redistribution of NRBP from the cytoplasm to the perinuclear region. Furthermore, a set of membrane structures affiliated with the rough ER at the perinuclear region was induced in cells transfected with NS3. These structures are reminiscent of the virus-induced convoluted membranes previously observed in flavivirus-infected cells. This interaction between dengue viral and host cell proteins as well as the formation of the NS3-induced membrane structures suggest that NS3 may subvert the role of NRBP in ER-Golgi trafficking.
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Affiliation(s)
- John J E Chua
- Programme in Infectious Diseases, Department of Microbiology, Faculty of Medicine, National University of Singapore, Kent Ridge, Singapore 117597, Singapore
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Lim R, Winteringham LN, Williams JH, McCulloch RK, Ingley E, Tiao JYH, Lalonde JP, Tsai S, Tilbrook PA, Sun Y, Wu X, Morris SW, Klinken SP. MADM, a novel adaptor protein that mediates phosphorylation of the 14-3-3 binding site of myeloid leukemia factor 1. J Biol Chem 2002; 277:40997-1008. [PMID: 12176995 DOI: 10.1074/jbc.m206041200] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A yeast two-hybrid screen was conducted to identify binding partners of Mlf1, an oncoprotein recently identified in a translocation with nucleophosmin that causes acute myeloid leukemia. Two proteins isolated in this screen were 14-3-3zeta and a novel adaptor, Madm. Mlf1 contains a classic RSXSXP sequence for 14-3-3 binding and is associated with 14-3-3zeta via this phosphorylated motif. Madm co-immunoprecipitated with Mlf1 and co-localized in the cytoplasm. In addition, Madm recruited a serine kinase, which phosphorylated both Madm and Mlf1 including the RSXSXP motif. In contrast to wild-type Mlf1, the oncogenic fusion protein nucleophosmin (NPM)-MLF1 did not bind 14-3-3zeta, had altered Madm binding, and localized exclusively in the nucleus. Ectopic expression of Madm in M1 myeloid cells suppressed cytokine-induced differentiation unlike Mlf1, which promotes maturation. Because the Mlf1 binding region of Madm and its own dimerization domain overlapped, the levels of Madm and Mlf1 may affect complex formation and regulate differentiation. In summary, this study has identified two partner proteins of Mlf1 that may influence its subcellular localization and biological function.
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Affiliation(s)
- Raelene Lim
- Laboratory for Cancer Medicine, Medical Research Foundation, Royal Perth Hospital, Western Australian Institute for Medical Research, Rear 50 Murray Street, Perth, WA 6000, Australia
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Henry JJ, Carinato ME, Schaefer JJ, Wolfe AD, Walter BE, Perry KJ, Elbl TN. Characterizing gene expression during lens formation in Xenopus laevis: evaluating the model for embryonic lens induction. Dev Dyn 2002; 224:168-85. [PMID: 12112470 DOI: 10.1002/dvdy.10097] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Few directed searches have been undertaken to identify the genes involved in vertebrate lens formation. In the frog Xenopus, the larval cornea can undergo a process of transdifferentiation to form a new lens once the original lens is removed. Based on preliminary evidence, we have shown that this process shares many elements of a common molecular/genetic pathway to that involved in embryonic lens development. A subtracted cDNA library, enriched for genes expressed during cornea-lens transdifferentiation, was prepared. The similarities/identities of specific clones isolated from the subtracted cDNA library define an expression profile of cells undergoing cornea-lens transdifferentiation ("lens regeneration") and corneal wound healing (the latter representing a consequence of the surgery required to trigger transdifferentiation). Screens were undertaken to search for genes expressed during both transdifferentiation and embryonic lens development. Significantly, new genes were recovered that are also expressed during embryonic lens development. The expression of these genes, as well as others known to be expressed during embryonic development in Xenopus, can be correlated with different periods of embryonic lens induction and development, in an attempt to define these events in a molecular context. This information is considered in light of our current working model of embryonic lens induction, in which specific tissue properties and phases of induction have been previously defined in an experimental context. Expression data reveal the existence of further levels of complexity in this process and suggests that individual phases of lens induction and specific tissue properties are not strictly characterized or defined by expression of individual genes.
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Affiliation(s)
- Jonathan J Henry
- Department of Cell and Structural Biology, University of Illinois, Urbana, Illinois 61801, USA.
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Zhou D, Chen S. PNRC2 is a 16 kDa coactivator that interacts with nuclear receptors through an SH3-binding motif. Nucleic Acids Res 2001; 29:3939-48. [PMID: 11574675 PMCID: PMC60244 DOI: 10.1093/nar/29.19.3939] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2001] [Revised: 08/14/2001] [Accepted: 08/14/2001] [Indexed: 11/14/2022] Open
Abstract
PNRC2 (proline-rich nuclear receptor co-regulatory protein 2) was identified using mouse steroidogenic factor 1 (SF1) as bait in a yeast two-hybrid screening of a human mammary gland cDNA expression library. PNRC2 is an unusual coactivator in that it is the smallest coactivator identified so far, with a molecular weight of 16 kDa, and interacts with nuclear receptors using a proline-rich sequence. In yeast two-hybrid assays PNRC2 interacted with orphan receptors SF1 and estrogen receptor-related receptor alpha1 in a ligand-independent manner. PNRC2 was also found to interact with the ligand-binding domains of estrogen receptor, glucocorticoid receptor, progesterone receptor, thyroid receptor, retinoic acid receptor and retinoid X receptor in a ligand-dependent manner. A functional activation function 2 domain is required for nuclear receptors to interact with PNRC2. Using the yeast two-hybrid assay, the region amino acids 85-139 was found to be responsible for the interaction with nuclear receptors. This region contains an SH3 domain-binding motif (SEPPSPS) and an NR box-like sequence (LKTLL). A mutagenesis study has shown that the SH3 domain-binding motif is important for PNRC2 to interact with all the nuclear receptors tested. Our results reveal that PNRC2 has a structure and function similar to PNRC, a previously characterized coactivator. These two proteins represent a new type of nuclear receptor co-regulatory proteins.
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Affiliation(s)
- D Zhou
- Division of Immunology, Beckman Research Institute of the City of Hope, 1450 East Duarte Road, Duarte, CA 91010, USA
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