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Tibarewal P, Spinelli L, Maccario H, Leslie NR. Proteomic and yeast 2-hybrid screens to identify PTEN binding partners. Adv Biol Regul 2024; 91:100989. [PMID: 37839992 DOI: 10.1016/j.jbior.2023.100989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 09/25/2023] [Indexed: 10/17/2023]
Abstract
PTEN is a phosphoinositide lipid phosphatase and an important tumour suppressor protein. PTEN function is reduced or lost in around a third of all human cancers through diverse mechanisms, from gene deletion to changes in the function of proteins which regulate PTEN through direct protein binding. Here we present data from SILAC (Stable Isotope Labelling by Amino acids in Cell culture) proteomic screens to identify proteins which bind to PTEN. These experiments using untransformed epithelial cells and glioma cells identified several novel candidate proteins in addition to many previously identified PTEN binding partners and many proteins which are recognised as common false positives using these methods. From subsequent co-expression pull-down experiments we provide further evidence supporting the physical interaction of PTEN with MMP1, Myosin 18A and SHROOM3. We also performed yeast two-hybrid screens which identify the previously recognised PTEN binding partner MSP58 in addition to the nuclear import export receptor TNPO3. These experiments identify several novel candidate binding partners of PTEN and provide further data addressing the set of proteins that interact with this important tumour suppressor.
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Affiliation(s)
- Priyanka Tibarewal
- Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot Watt University, Edinburgh, UK; School of Life Sciences, University of Dundee, Dundee, UK; UCL Cancer Centre, University College London, London, UK
| | - Laura Spinelli
- Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot Watt University, Edinburgh, UK; School of Life Sciences, University of Dundee, Dundee, UK
| | - Helene Maccario
- School of Life Sciences, University of Dundee, Dundee, UK; Aix-Marseille University, Marseille, UK
| | - Nick R Leslie
- Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot Watt University, Edinburgh, UK.
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2
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Zhang J, Dong Y, Shi Z, He H, Chen J, Zhang S, Wu W, Zhang Q, Han C, Hao L. P3H4 and PLOD1 expression associates with poor prognosis in bladder cancer. Clin Transl Oncol 2022; 24:1524-1532. [PMID: 35149972 DOI: 10.1007/s12094-022-02791-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 01/21/2022] [Indexed: 12/24/2022]
Abstract
PURPOSE The prolyl 3-hydroxylase family member 4 gene (P3H4) is involved in the development of human cancers. The association of P3H4 with bladder cancer (BC) prognosis is unclear. This study aimed to analyze the association of P3H4 with BC prognosis. METHODS RNA-Seq data were downloaded from The Cancer Genome Atlas project and BC microarray datasets (GSE13507, GSE31684, and GSE32548) were downloaded from the Gene Expression Omnibus database. We analyzed the differences in P3H4 expression levels between BC tumors and non-tumor tissues and between samples with different clinical information. The association of P3H4 and P3H4-related genes with BC prognosis and the possibility of using P3H4 expression as a prognostic biomarker in BC patients were also analyzed. RevMan was used to perform the meta-analysis. RESULTS P3H4 was upregulated in BC tissues compared with the adjacent non-tumor tissues (p = 4.06e-08). Univariate Cox regression analysis and meta-analysis showed that high P3H4 expression level contributed to a poor BC prognosis (Hazard ratio, HR = 1.348, 95% CI 1.140-1.594, p = 4.89e-04; meta-analysis: HR = 1.45, 95% CI 1.10-1.91; p = 9.00e-03). Among the genes related to P3H4, the PLOD1 gene was closely associated with P3H4 expression (r = 0.620, p = 2.49e-44). Also, a meta-analysis showed that PLOD1 expression was associated with a poor prognosis in BC patients (HR = 1.77, 95% CI 1.31-2.38; p = 2.00e-04). CONCLUSIONS The P3H4 and PLOD1 genes might be used as reliable prognostic biomarkers for BC.
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Affiliation(s)
- Junjie Zhang
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China.,Department of Urology, Xuzhou Central Hospital, 199 Jiefang South Road, Xuzhou, 221009, Jiangsu, China
| | - Yang Dong
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China.,Department of Urology, Xuzhou Central Hospital, 199 Jiefang South Road, Xuzhou, 221009, Jiangsu, China
| | - Zhenduo Shi
- Department of Urology, Xuzhou Central Hospital, 199 Jiefang South Road, Xuzhou, 221009, Jiangsu, China
| | - Houguang He
- Department of Urology, Xuzhou Central Hospital, 199 Jiefang South Road, Xuzhou, 221009, Jiangsu, China
| | - Jiangang Chen
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China
| | - Shaoqi Zhang
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China
| | - Wei Wu
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China
| | - Qianjin Zhang
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China
| | - Conghui Han
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China.,Department of Urology, Xuzhou Central Hospital, 199 Jiefang South Road, Xuzhou, 221009, Jiangsu, China
| | - Lin Hao
- Medical College of Soochow University, Suzhou, 215123, Jiangsu, China. .,Department of Urology, Xuzhou Central Hospital, 199 Jiefang South Road, Xuzhou, 221009, Jiangsu, China.
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3
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Transcriptome-(phospho)proteome characterization of brain of a germline model of cytoplasmic-predominant Pten expression with autism-like phenotypes. NPJ Genom Med 2021; 6:42. [PMID: 34078911 PMCID: PMC8173008 DOI: 10.1038/s41525-021-00201-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 04/13/2021] [Indexed: 11/08/2022] Open
Abstract
PTEN has a strong Mendelian association with autism spectrum disorder (ASD), representing a special case in autism's complex genetic architecture. Animal modeling for constitutional Pten mutation creates an opportunity to study how disruption of Pten affects neurobiology and glean potential insight into ASD pathogenesis. Subsequently, we comprehensively characterized the neural (phospho)proteome of Ptenm3m4/m3m4 mice, which exhibits cytoplasmic-predominant Pten expression, by applying mass spectrometry technology to their brains at two-weeks- (P14) and six-weeks-of-age (P40). The differentially expressed/phosphorylated proteins were subjected to gene enrichment, pathway, and network analyses to assess the affected biology. We identified numerous differentially expressed/phosphorylated proteins, finding greater dysregulation at P40 consistent with prior transcriptomic data. The affected pathways were largely related to PTEN function or neurological processes, while scant direct overlap was found across datasets. Network analysis pointed to ASD risk genes like Pten and Psd-95 as major regulatory hubs, suggesting they likely contribute to initiation or maintenance of cellular and perhaps organismal phenotypes related to ASD.
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4
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Smith SL, Pitt AR, Spickett CM. Approaches to Investigating the Protein Interactome of PTEN. J Proteome Res 2020; 20:60-77. [PMID: 33074689 DOI: 10.1021/acs.jproteome.0c00570] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The tumor suppressor phosphatase and tensin homologue (PTEN) is a redox-sensitive dual specificity phosphatase with an essential role in the negative regulation of the PI3K-AKT signaling pathway, affecting metabolic and cell survival processes. PTEN is commonly mutated in cancer, and dysregulation in the metabolism of PIP3 is implicated in other diseases such as diabetes. PTEN interactors are responsible for some functional roles of PTEN beyond the negative regulation of the PI3K pathway and are thus of great importance in cell biology. Both high-data content proteomics-based approaches and low-data content PPI approaches have been used to investigate the interactome of PTEN and elucidate further functions of PTEN. While low-data content approaches rely on co-immunoprecipitation and Western blotting, and as such require previously generated hypotheses, high-data content approaches such as affinity pull-down proteomic assays or the yeast 2-hybrid system are hypothesis generating. This review provides an overview of the PTEN interactome, including redox effects, and critically appraises the methods and results of high-data content investigations into the global interactome of PTEN. The biological significance of findings from recent studies is discussed and illustrates the breadth of cellular functions of PTEN that can be discovered by these approaches.
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Affiliation(s)
- Sarah L Smith
- School of Life and Health Sciences, Aston Triangle, Aston University, B4 7ET, Birmingham, U.K
| | - Andrew R Pitt
- School of Life and Health Sciences, Aston Triangle, Aston University, B4 7ET, Birmingham, U.K.,Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, U.K
| | - Corinne M Spickett
- School of Life and Health Sciences, Aston Triangle, Aston University, B4 7ET, Birmingham, U.K
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5
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Hao L, Pang K, Pang H, Zhang J, Zhang Z, He H, Zhou R, Shi Z, Han C. Knockdown of P3H4 inhibits proliferation and invasion of bladder cancer. Aging (Albany NY) 2020; 12:2156-2168. [PMID: 32018225 PMCID: PMC7041761 DOI: 10.18632/aging.102732] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 01/02/2020] [Indexed: 01/20/2023]
Abstract
The prolyl 3-hydroxylase family member 4 (P3H4) (alias SC65) is implicated in a variety of physiological and pathological processes. However, little is known about the role of P3H4 in tumors. This study aimed to investigate the role of P3H4 in bladder cancer (BC) and the regulatory mechanisms that influence its expression. P3H4 was highly expressed in BC tissues. Knockdown of P3H4 inhibited BC cell proliferation, cell cycle, migration and invasion in vitro, and inhibited BC growth in vivo. We also found that ETV4 bound directly to the promoter region of P3H4 and activated its transcription. Furthermore, overexpression of ETV4 rescued the inhibition of proliferation and invasion induced by PH4 silencing. ETV4 was significantly overexpressed in the BC tissues. In conclusion, P3H4 functioned an oncogene role in BC progression, and ETV4 bound directly to the P3H4 promoter region to regulate its transcription.
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Affiliation(s)
- Lin Hao
- Department of Urology, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China.,The Third Affiliated Hospital of Soochow University, Changzhou 213000, Jiangsu, China
| | - Kun Pang
- Department of Urology, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China.,The Third Affiliated Hospital of Soochow University, Changzhou 213000, Jiangsu, China
| | - Hui Pang
- Central Laboratory, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China
| | - Junjie Zhang
- Department of Urology, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China
| | - Zhiguo Zhang
- Department of Urology, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China.,The Third Affiliated Hospital of Soochow University, Changzhou 213000, Jiangsu, China
| | - Houguang He
- Department of Urology, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China.,College of Science and Technology, Jiangsu Normal University, Xuzhou 221009, Jiangsu, China
| | - Rongsheng Zhou
- Department of Urology, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China
| | - Zhenduo Shi
- Department of Urology, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China
| | - Conghui Han
- Department of Urology, Xuzhou Central Hospital, Xuzhou 221009, Jiangsu, China.,The Third Affiliated Hospital of Soochow University, Changzhou 213000, Jiangsu, China
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6
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Li Z, Xie J, Fei Y, Gao P, Xie Q, Gao W, Xu Z. GDNF family receptor alpha 2 promotes neuroblastoma cell proliferation by interacting with PTEN. Biochem Biophys Res Commun 2019; 510:339-344. [PMID: 30722993 DOI: 10.1016/j.bbrc.2018.12.169] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 12/26/2018] [Accepted: 12/26/2018] [Indexed: 11/29/2022]
Abstract
Neuroblastoma is a childhood tumor, and high-stage neuroblastoma has a poor prognosis. The regulatory mechanisms for neuroblastoma progression are poorly understood. In present study, we found that GDNF family receptor alpha 2 (GFRA2) was upregulated in neuroblastoma cells and tissues, and its overexpression promoted neuroblastoma cell proliferation, as revealed using colony formation, soft agar growth, and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays Tumor suppressor phosphatase and tensin homolog (PTEN) is an inhibitor of the phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)/AKT serine/threonine kinase (AKT) pathway that interacts with GFRA2. A luciferase activity assay showed GFRA2 inhibits the transcriptional activity of the forkhead box O (FOXO) family proteins, which suggested that GFRA2 activated the PI3K/AKT pathway. Inhibition of the PI3K/AKT pathway in GFRA2 overexpressing cells decreased cell proliferation, confirming that GFRA2 promoted neuroblastoma cell proliferation by activating the PI3K/AKT pathway. In summary, cell proliferation via the GFRA2-PTEN-PI3K/AKT axis may represent new target to develop treatments for neuroblastoma.
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Affiliation(s)
- Zuoqing Li
- Department of Pediatric Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Juntao Xie
- Department of Pediatric Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yingchun Fei
- Department of Pediatric Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Pengfei Gao
- Department of Pediatric Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Qigen Xie
- Department of Pediatric Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Wenzong Gao
- Department of Pediatric Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
| | - Zhe Xu
- Department of Pediatric Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
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7
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Nuclear PTEN safeguards pre-mRNA splicing to link Golgi apparatus for its tumor suppressive role. Nat Commun 2018; 9:2392. [PMID: 29921876 PMCID: PMC6008332 DOI: 10.1038/s41467-018-04760-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 05/21/2018] [Indexed: 12/11/2022] Open
Abstract
Dysregulation of pre-mRNA alternative splicing (AS) is closely associated with cancers. However, the relationships between the AS and classic oncogenes/tumor suppressors are largely unknown. Here we show that the deletion of tumor suppressor PTEN alters pre-mRNA splicing in a phosphatase-independent manner, and identify 262 PTEN-regulated AS events in 293T cells by RNA sequencing, which are associated with significant worse outcome of cancer patients. Based on these findings, we report that nuclear PTEN interacts with the splicing machinery, spliceosome, to regulate its assembly and pre-mRNA splicing. We also identify a new exon 2b in GOLGA2 transcript and the exon exclusion contributes to PTEN knockdown-induced tumorigenesis by promoting dramatic Golgi extension and secretion, and PTEN depletion significantly sensitizes cancer cells to secretion inhibitors brefeldin A and golgicide A. Our results suggest that Golgi secretion inhibitors alone or in combination with PI3K/Akt kinase inhibitors may be therapeutically useful for PTEN-deficient cancers.
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8
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Zimmerman SM, Besio R, Heard-Lipsmeyer ME, Dimori M, Castagnola P, Swain FL, Gaddy D, Diekman AB, Morello R. Expression characterization and functional implication of the collagen-modifying Leprecan proteins in mouse gonadal tissue and mature sperm. AIMS GENETICS 2018; 5:24-40. [PMID: 30417103 PMCID: PMC6221197 DOI: 10.3934/genet.2018.1.24] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The Leprecan protein family which includes the prolyl 3-hydroxylase enzymes (P3H1, P3H2, and P3H3), the closely related cartilage-associated protein (CRTAP), and SC65 (Synaptonemal complex 65, aka P3H4, LEPREL4), is involved in the post-translational modification of fibrillar collagens. Mutations in CRTAP, P3H1 and P3H2 cause human genetic diseases. We recently showed that SC65 forms a stable complex in the endoplasmic reticulum with P3H3 and lysyl hydroxylase 1 and that loss of this complex leads to defective collagen lysyl hydroxylation and causes low bone mass and skin fragility. Interestingly, SC65 was initially described as a synaptonemal complex-associated protein, suggesting a potential additional role in germline cells. In the present study, we describe the expression of SC65, CRTAP and other Leprecan proteins in postnatal mouse reproductive organs. We detect SC65 expression in peritubular cells of testis up to 4 weeks of age but not in cells within seminiferous tubules, while its expression is maintained in ovarian follicles until adulthood. Similar to bone and skin, SC65 and P3H3 are also tightly co-expressed in testis and ovary. Moreover, we show that CRTAP, a protein normally involved in collagen prolyl 3-hydroxylation, is highly expressed in follicles and stroma of the ovary and in testes interstitial cells at 4 weeks of age, germline cells and mature sperm. Importantly, CrtapKO mice have a mild but significant increase in morphologically abnormal mature sperm (17% increase compared to WT). These data suggest a role for the Leprecans in the post-translational modification of collagens expressed in the stroma of the reproductive organs. While we could not confirm that SC65 is part of the synaptonemal complex, the expression of CRTAP in the seminiferous tubules and in mature sperm suggest a role in the testis germ cell lineage and sperm morphogenesis.
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Affiliation(s)
- Sarah M Zimmerman
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Roberta Besio
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Melissa E Heard-Lipsmeyer
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Milena Dimori
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | | | - Frances L Swain
- Department of Orthopaedic Surgery, Center for Orthopaedic Research, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Dana Gaddy
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Alan B Diekman
- Department of Biochemistry, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Roy Morello
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA.,Department of Orthopaedic Surgery, Center for Orthopaedic Research, University of Arkansas for Medical Sciences, Little Rock, AR, USA.,Division of Genetics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
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9
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Psatha K, Kollipara L, Voutyraki C, Divanach P, Sickmann A, Rassidakis GZ, Drakos E, Aivaliotis M. Deciphering lymphoma pathogenesis via state-of-the-art mass spectrometry-based quantitative proteomics. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1047:2-14. [PMID: 27979587 DOI: 10.1016/j.jchromb.2016.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 10/18/2016] [Accepted: 11/04/2016] [Indexed: 12/13/2022]
Abstract
Mass spectrometry-based quantitative proteomics specifically applied to comprehend the pathogenesis of lymphoma has incremental value in deciphering the heterogeneity in complex deregulated molecular mechanisms/pathways of the lymphoma entities, implementing the current diagnostic and therapeutic strategies. Essential global, targeted and functional differential proteomics analyses although still evolving, have been successfully implemented to shed light on lymphoma pathogenesis to discover and explore the role of potential lymphoma biomarkers and drug targets. This review aims to outline and appraise the present status of MS-based quantitative proteomic approaches in lymphoma research, introducing the current state-of-the-art MS-based proteomic technologies, the opportunities they offer in biological discovery in human lymphomas and the related limitation issues arising from sample preparation to data evaluation. It is a synopsis containing information obtained from recent research articles, reviews and public proteomics repositories (PRIDE). We hope that this review article will aid, assimilate and assess all the information aiming to accelerate the development and validation of diagnostic, prognostic or therapeutic targets for an improved and empowered clinical proteomics application in lymphomas in the nearby future.
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Affiliation(s)
- Konstantina Psatha
- Institute of Molecular Biology and Biotechnology, FORTH, Heraklion, Greece; School of Medicine, National and Kapodistrian University of Athens, Athens, Greece; Department of Pathology, School of Medicine, University of Crete, Heraklion, Greece
| | - Laxmikanth Kollipara
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Dortmund, Germany
| | | | - Peter Divanach
- Institute of Molecular Biology and Biotechnology, FORTH, Heraklion, Greece
| | - Albert Sickmann
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Dortmund, Germany; Department of Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen, Scotland, United Kingdom; Medizinische Fakultät, Medizinische Proteom-Center (MPC), Ruhr-Universität Bochum, Bochum, Germany
| | - George Z Rassidakis
- School of Medicine, National and Kapodistrian University of Athens, Athens, Greece; Department of Pathology and Cytology, Karolinska University Hospital and Karolinska Institute, Radiumhemmet, Stockholm, SE-17176, Sweden
| | - Elias Drakos
- Department of Pathology, School of Medicine, University of Crete, Heraklion, Greece
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10
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GFRα2 prompts cell growth and chemoresistance through down-regulating tumor suppressor gene PTEN via Mir-17-5p in pancreatic cancer. Cancer Lett 2016; 380:434-441. [PMID: 27400681 DOI: 10.1016/j.canlet.2016.06.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 06/15/2016] [Accepted: 06/17/2016] [Indexed: 12/20/2022]
Abstract
Nerve growth factors and their receptors have received an increasing attention in certain cancers since they play an important role in regulating tumorigenesis, biological process and metastasis. Here we aimed at characterizing a new function of one of the subtypes of growth factor receptors (GFR), GFRα2, in pancreatic cancer. In this study, we showed that GFRα2 was up-regulated in pancreatic adenocarcinoma and was positively correlated with tumor size and perineural invasion, which indicated that it may be associated with cell growth and apoptosis. Mechanically, we discovered that high GFRα2 expression level leads to PTEN inactivation via enhancing Mir-17-5p level.
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11
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Verrastro I, Tveen-Jensen K, Woscholski R, Spickett CM, Pitt AR. Reversible oxidation of phosphatase and tensin homolog (PTEN) alters its interactions with signaling and regulatory proteins. Free Radic Biol Med 2016; 90:24-34. [PMID: 26561776 DOI: 10.1016/j.freeradbiomed.2015.11.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 11/04/2015] [Accepted: 11/05/2015] [Indexed: 12/27/2022]
Abstract
Phosphatase and tensin homolog (PTEN) is involved in a number of different cellular processes including metabolism, apoptosis, cell proliferation and survival. It is a redox-sensitive dual-specificity protein phosphatase that acts as a tumor suppressor by negatively regulating the PI3K/Akt pathway. While direct evidence of redox regulation of PTEN downstream signaling has been reported, the effect of PTEN redox status on its protein-protein interactions is poorly understood. PTEN-GST in its reduced and a DTT-reversible H2O2-oxidized form was immobilized on a glutathione-sepharose support and incubated with cell lysate to capture interacting proteins. Captured proteins were analyzed by LC-MSMS and comparatively quantified using label-free methods. 97 Potential protein interactors were identified, including a significant number that are novel. The abundance of fourteen interactors was found to vary significantly with the redox status of PTEN. Altered binding to PTEN was confirmed by affinity pull-down and Western blotting for Prdx1, Trx, and Anxa2, while DDB1 was validated as a novel interactor with unaltered binding. These results suggest that the redox status of PTEN causes a functional variation in the PTEN interactome. The resin capture method developed had distinct advantages in that the redox status of PTEN could be directly controlled and measured.
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Affiliation(s)
- Ivan Verrastro
- School of Life and Health Sciences, Aston Triangle, Aston University, Birmingham B4 7ET, UK
| | - Karina Tveen-Jensen
- School of Life and Health Sciences, Aston Triangle, Aston University, Birmingham B4 7ET, UK
| | - Rudiger Woscholski
- Department of Chemistry and Institute of Chemical Biology, Imperial College London, UK
| | - Corinne M Spickett
- School of Life and Health Sciences, Aston Triangle, Aston University, Birmingham B4 7ET, UK
| | - Andrew R Pitt
- School of Life and Health Sciences, Aston Triangle, Aston University, Birmingham B4 7ET, UK.
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12
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Hopkins BD, Hodakoski C, Barrows D, Mense SM, Parsons RE. PTEN function: the long and the short of it. Trends Biochem Sci 2014; 39:183-90. [PMID: 24656806 DOI: 10.1016/j.tibs.2014.02.006] [Citation(s) in RCA: 215] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 02/11/2014] [Accepted: 02/13/2014] [Indexed: 12/31/2022]
Abstract
Phosphatase and tensin homolog deleted on chromosome ten (PTEN) is a phosphatase that is frequently altered in cancer. PTEN has phosphatase-dependent and -independent roles, and genetic alterations in PTEN lead to deregulation of protein synthesis, the cell cycle, migration, growth, DNA repair, and survival signaling. PTEN localization, stability, conformation, and phosphatase activity are controlled by an array of protein-protein interactions and post-translational modifications. Thus, PTEN-interacting and -modifying proteins have profound effects on the tumor suppressive functions of PTEN. Moreover, recent studies identified mechanisms by which PTEN can exit cells, via either exosomal export or secretion, and act on neighboring cells. This review focuses on modes of PTEN protein regulation and ways in which perturbations in this regulation may lead to disease.
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Affiliation(s)
- Benjamin D Hopkins
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA
| | - Cindy Hodakoski
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA
| | - Douglas Barrows
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA
| | - Sarah M Mense
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA
| | - Ramon E Parsons
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA.
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13
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Kumar B, Alam SI, Kumar O. Host response to intravenous injection of epsilon toxin in mouse model: A proteomic view. Proteomics 2013; 13:89-107. [DOI: 10.1002/pmic.201200227] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 10/12/2012] [Accepted: 10/25/2012] [Indexed: 12/24/2022]
Affiliation(s)
- Bhoj Kumar
- Biotechnology Division; Defence Research & Development Establishment; Gwalior India
| | - Syed Imteyaz Alam
- Biotechnology Division; Defence Research & Development Establishment; Gwalior India
| | - Om Kumar
- Pharmacology and Toxicology Division; Defence Research & Development Establishment; Gwalior India
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14
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Edimo WE, Janssens V, Waelkens E, Erneux C. Reversible Ser/Thr SHIP phosphorylation: a new paradigm in phosphoinositide signalling?: Targeting of SHIP1/2 phosphatases may be controlled by phosphorylation on Ser and Thr residues. Bioessays 2012; 34:634-42. [PMID: 22641604 DOI: 10.1002/bies.201100195] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Phosphoinositide (PI) phosphatases such as the SH2 domain-containing inositol 5-phosphatases 1/2 (SHIP1 and 2) are important signalling enzymes in human physiopathology. SHIP1/2 interact with a large number of immune and growth factor receptors. Tyrosine phosphorylation of SHIP1/2 has been considered to be the determining regulatory modification. However, here we present a hypothesis, based on recent key publications, highlighting the determining role of Ser/Thr phosphorylation in regulating several key properties of SHIP1/2. Since a subunit of the Ser/Thr phosphatase PP2A has been shown to interact with SHIP2, a putative mechanism for reversing SHIP2 Ser/Thr phosphorylation can be anticipated. PI phosphatases are potential target molecules in human diseases, particularly, but not exclusively, in cancer and diabetes. Therefore, this novel regulatory mechanism deserves further attention in the hunt for discovering novel or complementary therapeutic strategies. This mechanism may be more broadly involved in regulating PI signalling in the case of synaptojanin1 or the phosphatase, tensin homolog, deleted on chromosome TEN.
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Affiliation(s)
- William's Elong Edimo
- Institut de Recherche Interdisciplinaire (IRIBHM), Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
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15
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Bononi A, Agnoletto C, De Marchi E, Marchi S, Patergnani S, Bonora M, Giorgi C, Missiroli S, Poletti F, Rimessi A, Pinton P. Protein kinases and phosphatases in the control of cell fate. Enzyme Res 2011; 2011:329098. [PMID: 21904669 PMCID: PMC3166778 DOI: 10.4061/2011/329098] [Citation(s) in RCA: 209] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 05/06/2011] [Accepted: 06/08/2011] [Indexed: 12/19/2022] Open
Abstract
Protein phosphorylation controls many aspects of cell fate and is often deregulated in pathological conditions. Several recent findings have provided an intriguing insight into the spatial regulation of protein phosphorylation across different subcellular compartments and how this can be finely orchestrated by specific kinases and phosphatases. In this review, the focus will be placed on (i) the phosphoinositide 3-kinase (PI3K) pathway, specifically on the kinases Akt and mTOR and on the phosphatases PP2a and PTEN, and on (ii) the PKC family of serine/threonine kinases. We will look at general aspects of cell physiology controlled by these kinases and phosphatases, highlighting the signalling pathways that drive cell division, proliferation, and apoptosis.
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Affiliation(s)
- Angela Bononi
- Section of General Pathology, Department of Experimental and Diagnostic Medicine, Interdisciplinary Center for the Study of Inflammation (ICSI) and LTTA Center, University of Ferrara, 44100 Ferrara, Italy
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16
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Maccario H, Perera NM, Gray A, Downes CP, Leslie NR. Ubiquitination of PTEN (phosphatase and tensin homolog) inhibits phosphatase activity and is enhanced by membrane targeting and hyperosmotic stress. J Biol Chem 2010; 285:12620-8. [PMID: 20177066 DOI: 10.1074/jbc.m109.072280] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The PTEN (phosphatase and tensin homolog) tumor suppressor is a phosphatase that inhibits phosphoinositide 3-kinase-dependent signaling by metabolizing the phosphoinositide lipid phosphatidylinositol 3,4,5-trisphosphate (PtdInsP(3)) at the plasma membrane. PTEN can be mono- or polyubiquitinated, and this appears to control its nuclear localization and stability, respectively. Although PTEN phosphorylation at a cluster of C-terminal serine and threonine residues has been shown to stabilize the protein and inhibit polyubiquitination and plasma membrane localization, details of the regulation of ubiquitination are unclear. Here, we show that plasma membrane targeting of PTEN greatly enhances PTEN ubiquitination and that phosphorylation of PTEN in vitro does not affect subsequent ubiquitination. These data suggest that C-terminal phosphorylation indirectly regulates ubiquitination by controlling membrane localization. We also show that either mono- or polyubiquitination in vitro greatly reduces PTEN phosphatase activity. Finally, we show that hyperosmotic stress increases both PTEN ubiquitination and cellular PtdInsP(3) levels well before a reduction in PTEN protein levels is observed. Both PTEN ubiquitination and elevated PtdInsP(3) levels were reduced within 10 min after removal of the hyperosmotic stress. Our data indicate that ubiquitination may represent a regulated mechanism of direct reversible control over the PTEN enzyme.
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Affiliation(s)
- Helene Maccario
- Division of Molecular Physiology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, United Kingdom
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17
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Mosessian S, Avliyakulov NK, Mulholland DJ, Boontheung P, Loo JA, Wu H. Analysis of PTEN complex assembly and identification of heterogeneous nuclear ribonucleoprotein C as a component of the PTEN-associated complex. J Biol Chem 2009; 284:30159-66. [PMID: 19740742 DOI: 10.1074/jbc.m109.027995] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
PTEN (phosphatase and tensin homolog deleted on chromosome 10) is well characterized for its role in antagonizing the phosphoinositide 3-kinase pathway. Previous studies using size-exclusion chromatography demonstrated PTEN recruitment into high molecular mass complexes and hypothesized that PTEN phosphorylation status and PDZ binding domain may be required for such complex formation. In this study, we set out to test the structural requirements for PTEN complex assembly and identify the component(s) of the PTEN complex(es). Our results demonstrated that the PTEN catalytic function and PDZ binding domain are not absolutely required for its complex formation. On the other hand, PTEN phosphorylation status has a significant impact on its complex assembly. Our results further demonstrate enrichment of the PTEN complex in nuclear lysates, suggesting a mechanism through which PTEN phosphorylation may regulate its complex assembly. These results prompted further characterization of other protein components within the PTEN complex(es). Using size-exclusion chromatography and two-dimensional difference gel electrophoresis followed by mass spectrometry analysis, we identified heterogeneous nuclear ribonucleoprotein C (hnRNP C) as a novel protein recruited to higher molecular mass fractions in the presence of PTEN. Further analysis indicates that endogenous hnRNP C and PTEN interact and co-localize within the nucleus, suggesting a potential role for PTEN, alongside hnRNP C, in RNA regulation.
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Affiliation(s)
- Sherly Mosessian
- Department of Molecular and Medical Pharmacology, Institute for Molecular Medicine, University of California, Los Angeles, California 90095, USA
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18
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Zheng L, Liu S, Sun MZ, Chang J, Chance MR, Kern TS. Pharmacologic intervention targeting glycolytic-related pathways protects against retinal injury due to ischemia and reperfusion. Proteomics 2009; 9:1869-82. [PMID: 19288518 DOI: 10.1002/pmic.200701071] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Retinal ischemia contributes to multiple ocular diseases while aminoguanidine (AMG) treatment significantly inhibits the neuronal and vascular degeneration due to acute retinal ischemia and reperfusion (I/R) injury. In the present study, 2-D DIGE was applied to profile global protein expression changes due to retinal I/R injury, and the protection effects mediated by AMG. Retinal ischemia was induced by elevated intraocular pressure to 80-90 mmHg for 2 h, and reperfusion was established afterward. Retinal tissues were collected 2 days after I/R injury. After 2-D DIGE analysis, a total of 96 proteins were identified. Among them, 28 proteins were identified within gel spots whose intensities were normalized by AMG pretreatment, pathway analysis indicated that most were involved in glycolysis and carbohydrate metabolism. Selected enzymes identified by MS/MS within these pathways, including transketolase, triosephosphate isomerase 1, aldolase C, total enolase, and pyruvate kinase were validated by quantitative Western blots. Glycolytic enzymes and other differentially regulated proteins likely play previously unrecognized roles in retinal degeneration after I/R injury, and inhibition of the resulting metabolic changes, using pharmacologically agents such as AMG, serve to inhibit the changes in metabolism and mitigate retinal degeneration. Select glycolytic enzymes may provide novel therapeutic targets for inhibiting the neuronal and vascular degeneration after retinal I/R injury.
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Affiliation(s)
- Ling Zheng
- College of Life Sciences, Wuhan University, Wuhan, PR China.
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19
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Sun MZ, Liu S, Tang J, Wang Z, Gong X, Sun C, Greenaway F. Proteomics analysis of two mice hepatocarcinoma ascites syngeneic cell lines with high and low lymph node metastasis rates provide potential protein markers for tumor malignancy attributes to lymphatic metastasis. Proteomics 2009; 9:3285-302. [DOI: 10.1002/pmic.200701002] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Liu S, Sun MZ, Sun C, Zhao B, Greenaway FT, Zheng Q. A novel serine protease from the snake venom of Agkistrodon blomhoffii ussurensis. Toxicon 2008; 52:760-8. [PMID: 18817802 PMCID: PMC2845635 DOI: 10.1016/j.toxicon.2008.08.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Revised: 07/26/2008] [Accepted: 08/20/2008] [Indexed: 10/21/2022]
Abstract
A novel serine protease, ABUSV-SPase, was isolated to homogeneity for the first time from Chinese Agkistrodon blomhoffii ussurensis snake venom, and its enzymatic and structural properties were characterized by multiple techniques. ABUSV-SPase is a stable monomeric protein with a molecular mass of 26,752.6a.m.u. It reacts optimally with its substrate Nalpha-tosyl-l-arginine methyl ester (TAME) at pH 7.0 and 41 degrees C. ESI-MS/MS analysis indicates that ABUSV-SPase is a new serine protease, sharing peptide homologies with various snake venom serine proteases, especially the snake venom thrombin-like enzymes of this group, and serine protease precursors. It is a zinc-containing protein, and although zinc is not essential for activity, its replacement by various divalent metal ions, including Mg2+, Mn2+, and Ca2+, increases the TAME hydrolysis activity of the enzyme. The intrinsic fluorescences of Tyr and Trp residues of ABUSV-SPase have emission wavelengths red-shifted by 12.8nm and 3.6nm from those of free Tyr and Trp, respectively. The zinc ion increases the hydrophobicity of the environment of the Trp residues, increases the thermostability of the protein, and affects the protein secondary structure to stabilize the enzyme, but appears to have no direct role in its esterase hydrolysis activity.
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Affiliation(s)
- Shuqing Liu
- Department of Biochemistry, Dalian Medical University, Dalian 116044, PR China
| | - Ming-Zhong Sun
- Department of Biotechnology, Dalian Medical University, 9 West Lvshun South Road, Dalian, Liaoning 116044, PR China
| | - Changkai Sun
- Department of Physiology, Dalian Medical University, Dalian 116044, PR China
| | - Baochang Zhao
- Department of Biochemistry, Dalian Medical University, Dalian 116044, PR China
| | - Frederick T. Greenaway
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610, USA
| | - Qingyin Zheng
- Department of Otolaryngology–HNS, Case Western Reserve University, Cleveland, OH 44106, USA
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21
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Masse I, Molin L, Mouchiroud L, Vanhems P, Palladino F, Billaud M, Solari F. A novel role for the SMG-1 kinase in lifespan and oxidative stress resistance in Caenorhabditis elegans. PLoS One 2008; 3:e3354. [PMID: 18836529 PMCID: PMC2556085 DOI: 10.1371/journal.pone.0003354] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Accepted: 08/22/2008] [Indexed: 11/18/2022] Open
Abstract
The PTEN tumour suppressor encodes a phosphatase, and its daf-18 orthologue in Caenorhabditis elegans negatively regulates the insulin/IGF-1 DAF-2 receptor pathway that influences lifespan in worms and other species. In order to identify new DAF-18 regulated pathways involved in aging, we initiated a candidate RNAi feeding screen for clones that lengthen lifespan. Here, we report that smg-1 inactivation increases average lifespan in a daf-18 dependent manner. Genetic analysis is consistent with SMG-1 acting at least in part in parallel to the canonical DAF-2 receptor pathway, but converging on the transcription factor DAF-16/FOXO. SMG-1 is a serine-threonine kinase which plays a conserved role in nonsense-mediated mRNA decay (NMD) in worms and mammals. In addition, human SMG-1 has also been implicated in the p53-mediated response to genotoxic stress. The effect of smg-1 inactivation on lifespan appears to be unrelated to its NMD function, but requires the p53 tumour suppressor orthologue cep-1. Furthermore, smg-1 inactivation confers a resistance to oxidative stress in a daf-18-, daf-16- and cep-1-dependent manner. We propose that the role of SMG-1 in lifespan regulation is at least partly dependent on its function in oxidative stress resistance. Taken together, our results unveil a novel role for SMG-1 in lifespan regulation.
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Affiliation(s)
- Ingrid Masse
- Laboratoire de Génétique, Signalisation et Cancer, Université Claude Bernard Lyon 1, CNRS UMR5201 Domaine Rockefeller, Lyon, France
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22
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The tumour suppressor PTEN mediates a negative regulation of the E3 ubiquitin-protein ligase Nedd4. Biochem J 2008; 412:331-8. [DOI: 10.1042/bj20071403] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The tumour suppressor PTEN (phosphatase and tensin homologue deleted on chromosome 10; a phosphatidylinositol 3-phosphatase) is a multifunctional protein deregulated in many types of cancer. It is suggested that a number of proteins that relate with PTEN functionally or physically have not yet been found. In order to search for PTEN-interacting proteins that might be crucial in the regulation of PTEN, we exploited a proteomics-based approach. PTEN-expressing NIH 3T3 cell lysates were used in affinity chromatography and then analysed by LC–ESI–MS/MS (liquid chromatography–electrospray ionization–tandem MS). A total of 93 proteins were identified. Among the proteins identified, we concentrated on the E3 ubiquitin-protein ligase Nedd4 (neural-precursor-cell-expressed, developmentally down-regulated gene 4), and performed subsequent validation experiments using HeLa cells. Nedd4 inhibited PTEN-induced apoptotic cell death and, conversely, the Nedd4 level was down-regulated by PTEN. The down-regulation effect was diminished by a mutation (C124S) in the catalytic site of PTEN. Nedd4 expression was also decreased by a PI3K (phosphoinositide 3-kinase) inhibitor, LY294002, suggesting that the regulation is dependent on the phosphatase-kinase activity of the PTEN-PI3K/Akt pathway. Semi-quantitative real-time PCR analysis revealed that Nedd4 was transcriptionally regulated by PTEN. Thus our results have important implications regarding the roles of PTEN upon the E3 ubquitin ligase Nedd4 as a negative feedback regulator as well as a substrate.
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23
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Bonifant CL, Kim JS, Waldman T. NHERFs, NEP, MAGUKs, and more: interactions that regulate PTEN. J Cell Biochem 2008; 102:878-85. [PMID: 17786934 PMCID: PMC4384183 DOI: 10.1002/jcb.21518] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This year marks the 10th anniversary of the discovery of the PTEN/MMAC1/TEP1 tumor suppressor gene (hereafter referred to as PTEN), one of the most commonly mutated genes in cancer. PTEN encodes a lipid phosphatase that dephosphorylates phosphoinositide-3,4,5-triphosphate (PIP(3)), thereby counteracting mitogenic signaling pathways driven by phosphoinositol-3-kinases (PI3K). By opposing PI3K signaling, PTEN inhibits the activation of the critical PI3K effector proteins Akt1-3 (also known as protein kinase B or PKB). Given its central role in antagonizing PI3K signaling, one might expect that like PI3K, the activity of the PTEN protein would be highly regulated by numerous protein/protein interactions. However, surprisingly little is known about such interactions. This fact, combined with the generally accepted notion that phosphatases are less exquisitely regulated than kinases, has led to the idea that PTEN may function in a relatively unregulated fashion. Here we review the identities and proposed functions of known PTEN-interacting proteins, and point out avenues of investigation that we hope may be fruitful in identifying important new mechanisms of PTEN regulation in mammalian cells.
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Affiliation(s)
- Challice L. Bonifant
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University School of Medicine, Washington, District of Columbia 20057
- Tumor Biology Training Program, Lombardi Comprehensive Cancer Center, Georgetown University School of Medicine, Washington, District of Columbia 20057
| | - Jung-Sik Kim
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University School of Medicine, Washington, District of Columbia 20057
| | - Todd Waldman
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University School of Medicine, Washington, District of Columbia 20057
- Correspondence to: Todd Waldman, Lombardi Comprehensive Cancer Center, Georgetown University School of Medicine, 3970 Reservoir Road, NW, NRB E304, Washington, DC 20057.
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24
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Affiliation(s)
- A Gil
- Centro de Investigación Príncipe Felipe, Valencia, Spain
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25
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Lim MS, Elenitoba-Johnson KSJ. Mass Spectrometry-based Proteomic Studies of Human Anaplastic Large Cell Lymphoma. Mol Cell Proteomics 2006; 5:1787-98. [PMID: 16785248 DOI: 10.1074/mcp.r600005-mcp200] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Malignant lymphomas are a diverse group of malignant neoplasms that arise as a result of a complex interplay of multiple factors including genetic aberrations, immunosuppression, and exposure to noxious agents such as ionizing radiation and chemical agents. Anaplastic large cell lymphoma (ALCL) is an aggressive T-lineage lymphoma harboring chromosomal translocations involving the anaplastic lymphoma kinase (ALK) tyrosine kinase. The most common translocation in ALCL is the t(2;5)(p23;q35). This results in the formation of a chimeric fusion kinase, nucleophosmin/ALK. Nucleophosmin/ALK activates numerous downstream signaling pathways resulting in enhanced survival and proliferation. Using a variety of mass spectrometry-driven proteomic strategies, we have studied several aspects of the ALCL proteome. In this review, we provide a summary of mass spectrometry-based proteomic studies that expands the current understanding of the molecular pathogenesis of ALCL and provides the basis for the identification of biomarkers and targets for novel therapeutic agents.
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Affiliation(s)
- Megan S Lim
- Department of Pathology and Associated Regional and University Pathologists Institute for Clinical and Experimental Pathology, University of Utah Health Sciences Center, Salt Lake City, 84132, USA.
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26
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Abstract
Phosphatase and tensin homologue deleted on chromosome 10 (PTEN) is a phosphatidylinositol phosphate phosphatase and is frequently inactivated in human cancers. The balance between phosphoinositide 3-kinase (PI3K) and PTEN determines PI(3,4,5)P3 levels. PI3K is regulated by a variety of intracellular and extracellular signals, but little is known about the regulation of PTEN. In this article, we review control of PTEN function by phosphorylation as well as by binding of lipid and protein partners.
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Affiliation(s)
- Arne Gericke
- Chemistry Department, Kent State University, Kent, OH 44242, USA
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27
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Current Awareness on Comparative and Functional Genomics. Comp Funct Genomics 2005. [PMCID: PMC2447491 DOI: 10.1002/cfg.425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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