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Hallal SM, Tűzesi Á, Sida LA, Xian E, Madani D, Muralidharan K, Shivalingam B, Buckland ME, Satgunaseelan L, Alexander KL. Glioblastoma biomarkers in urinary extracellular vesicles reveal the potential for a 'liquid gold' biopsy. Br J Cancer 2024; 130:836-851. [PMID: 38212481 PMCID: PMC10912426 DOI: 10.1038/s41416-023-02548-9] [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: 08/14/2023] [Revised: 12/05/2023] [Accepted: 12/08/2023] [Indexed: 01/13/2024] Open
Abstract
BACKGROUND Biomarkers that reflect glioblastoma tumour activity and treatment response are urgently needed to help guide clinical management, particularly for recurrent disease. As the urinary system is a major clearance route of circulating extracellular vesicles (EVs; 30-1000 nm nanoparticles) we explored whether sampling urinary-EVs could serve as a simple and non-invasive liquid biopsy approach for measuring glioblastoma-associated biomarkers. METHODS Fifty urine specimens (15-60 ml) were collected from 24 catheterised glioblastoma patients immediately prior to primary (n = 17) and recurrence (n = 7) surgeries, following gross total resection (n = 9), and from age/gender-matched healthy participants (n = 14). EVs isolated by differential ultracentrifugation were characterised and extracted proteomes were analysed by high-resolution data-independent acquisition liquid chromatography tandem mass spectrometry (DIA-LC-MS/MS). RESULTS Overall, 6857 proteins were confidently identified in urinary-EVs (q-value ≤ 0.01), including 94 EV marker proteins. Glioblastoma-specific proteomic signatures were determined, and putative urinary-EV biomarkers corresponding to tumour burden and recurrence were identified (FC ≥ | 2 | , adjust p-val≤0.05, AUC > 0.9). CONCLUSION In-depth DIA-LC-MS/MS characterisation of urinary-EVs substantiates urine as a viable source of glioblastoma biomarkers. The promising 'liquid gold' biomarker panels described here warrant further investigation.
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Affiliation(s)
- Susannah M Hallal
- Brain Cancer Research, Neurosurgery Department, Chris O'Brien Lifehouse, Camperdown, NSW, Australia
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
- School of Medical Sciences, Faculty of Medicine and Health Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - Ágota Tűzesi
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
- School of Medical Sciences, Faculty of Medicine and Health Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - Liam A Sida
- School of Medical Sciences, Faculty of Medicine and Health Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - Elissa Xian
- Brain Cancer Research, Neurosurgery Department, Chris O'Brien Lifehouse, Camperdown, NSW, Australia
- Neurosurgery Department, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Daniel Madani
- Brain Cancer Research, Neurosurgery Department, Chris O'Brien Lifehouse, Camperdown, NSW, Australia
- Neurosurgery Department, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Krishna Muralidharan
- Brain Cancer Research, Neurosurgery Department, Chris O'Brien Lifehouse, Camperdown, NSW, Australia
- Neurosurgery Department, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Brindha Shivalingam
- Brain Cancer Research, Neurosurgery Department, Chris O'Brien Lifehouse, Camperdown, NSW, Australia
- Neurosurgery Department, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
- Sydney Medical School, Faculty of Medicine and Health Sciences, The University of Sydney, Sydney, NSW, Australia
| | - Michael E Buckland
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
- School of Medical Sciences, Faculty of Medicine and Health Sciences, The University of Sydney, Camperdown, NSW, Australia
| | - Laveniya Satgunaseelan
- Brain Cancer Research, Neurosurgery Department, Chris O'Brien Lifehouse, Camperdown, NSW, Australia
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
- Sydney Medical School, Faculty of Medicine and Health Sciences, The University of Sydney, Sydney, NSW, Australia
| | - Kimberley L Alexander
- Brain Cancer Research, Neurosurgery Department, Chris O'Brien Lifehouse, Camperdown, NSW, Australia.
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia.
- School of Medical Sciences, Faculty of Medicine and Health Sciences, The University of Sydney, Camperdown, NSW, Australia.
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Kitamura K, Homma T, Sohel MSH, Fuyuki A, Miyawaki S, Onouchi S, Saito S. Expression patterns of prosaposin and its receptors, G protein-coupled receptor (GPR) 37 and GPR37L1, in the mouse olfactory organ. Tissue Cell 2023; 82:102093. [PMID: 37075680 DOI: 10.1016/j.tice.2023.102093] [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: 01/29/2023] [Revised: 03/24/2023] [Accepted: 04/14/2023] [Indexed: 04/21/2023]
Abstract
Prosaposin is a glycoprotein conserved widely in vertebrates, because it is a precursor for saposins that are required for normal lysosomal function and thus for autophagy, and acts as a neurotrophic factor. Most tetrapods possess two kinds of olfactory neuroepithelia, namely, the olfactory epithelium (OE) and the vomeronasal epithelium (VNE). This study examined the expression patterns of prosaposin and its candidate receptors, G protein-coupled receptor (GPR) 37 and GPR37L1, in mouse OE and VNE by immunofluorescence and in situ hybridization. Prosaposin immunoreactivity was observed in the olfactory receptor neurons, vomeronasal receptor neurons, Bowman's gland (BG), and Jacobson's gland (JG). Prosaposin expression was mainly observed in mature neurons. Prosaposin mRNA expression was observed not only in these cells but also in the apical region of the VNE. GPR37 and GPR37L1 immunoreactivities were found only in the BG and/or the JG. Prosaposin was suggested to secrete and facilitate the autophagic activities of the neurons and modulate the mucus secretion in mouse olfactory organ.
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Affiliation(s)
- Kai Kitamura
- Laboratory of Veterinary Anatomy, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Takeshi Homma
- Laboratory of Veterinary Anatomy, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - Md Shahriar Hasan Sohel
- Laboratory of Veterinary Anatomy, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - Aimi Fuyuki
- Laboratory of Veterinary Anatomy, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Shingo Miyawaki
- Laboratory of Veterinary Surgery, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Sawa Onouchi
- Laboratory of Veterinary Anatomy, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan; Laboratory of Veterinary Anatomy, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - Shouichiro Saito
- Laboratory of Veterinary Anatomy, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan; Laboratory of Veterinary Anatomy, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan.
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3
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Wen Z, Yang C, Zou D, Liu J, Wang S, Liu X, Zhang Y, Zhang Y. Pan-cancer analysis of PSAP identifies its expression and clinical relevance in gastric cancer. Pathol Res Pract 2022; 238:154027. [PMID: 36084426 DOI: 10.1016/j.prp.2022.154027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 07/09/2022] [Accepted: 07/12/2022] [Indexed: 11/23/2022]
Abstract
Prosaposin (PSAP) plays a critical role in sphingolipid and cancer metabolism. Reports have shown that PSAP was involved in proliferation, tumorigenesis, and metastasis. However, the expression pattern of PSAP and its prognostic roles in gastric cancer remain elusive. PSAP expression pattern and its prognostic roles in gastric cancer (GC) were explored using data from the TCGA and Kaplan-Meier Plotter. Immunohistochemical staining of GC tissues was performed to validate the prognostic role of PSAP. TISIDB was used to analyze its correlation with immunomodulators. PSAP-associated genes, PDCD1, TGFB1, and CSF1R were used to build a risk model to evaluate immunotherapy outcomes of patients with stomach adenocarcinoma (STAD). Results showed that PSAP was highly expressed in GC. High PSAP expression in GC patients also significantly indicated a poor prognosis. The results of immunohistochemical staining showed that PSAP was an independent prognostic factor in GC patients. Based on three PSAP-associated genes, a risk model that could predict the prognosis and immunotherapy outcome of STAD was bulit. PSAP was an independent prognostic factor in GC. Our results have identified three prognosis-related genes which were useful to evaluate immunotherapy outcomes of STAD patients.
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Affiliation(s)
- Zhenpeng Wen
- The First Laboratory of Cancer Institute, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, PR China.
| | - Chunjiao Yang
- The First Laboratory of Cancer Institute, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, PR China.
| | - Dan Zou
- Department of Medical Oncology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Insititute, Shenyang, Liaoning Province 110042, PR China.
| | - Jiaqing Liu
- The First Laboratory of Cancer Institute, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, PR China.
| | - Song Wang
- The First Laboratory of Cancer Institute, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, PR China.
| | - Xuqin Liu
- The First Laboratory of Cancer Institute, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, PR China.
| | - Yi Zhang
- Department of Gynecology, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, PR China.
| | - Ye Zhang
- The First Laboratory of Cancer Institute, The First Hospital of China Medical University, Shenyang, Liaoning Province 110001, PR China.
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4
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Head SA, Hernandez-Alias X, Yang JS, Ciampi L, Beltran-Sastre V, Torres-Méndez A, Irimia M, Schaefer MH, Serrano L. Silencing of SRRM4 suppresses microexon inclusion and promotes tumor growth across cancers. PLoS Biol 2021; 19:e3001138. [PMID: 33621242 PMCID: PMC7935315 DOI: 10.1371/journal.pbio.3001138] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 03/05/2021] [Accepted: 02/04/2021] [Indexed: 01/14/2023] Open
Abstract
RNA splicing is widely dysregulated in cancer, frequently due to altered expression or activity of splicing factors (SFs). Microexons are extremely small exons (3–27 nucleotides long) that are highly evolutionarily conserved and play critical roles in promoting neuronal differentiation and development. Inclusion of microexons in mRNA transcripts is mediated by the SF Serine/Arginine Repetitive Matrix 4 (SRRM4), whose expression is largely restricted to neural tissues. However, microexons have been largely overlooked in prior analyses of splicing in cancer, as their small size necessitates specialized computational approaches for their detection. Here, we demonstrate that despite having low expression in normal nonneural tissues, SRRM4 is further silenced in tumors, resulting in the suppression of normal microexon inclusion. Remarkably, SRRM4 is the most consistently silenced SF across all tumor types analyzed, implying a general advantage of microexon down-regulation in cancer independent of its tissue of origin. We show that this silencing is favorable for tumor growth, as decreased SRRM4 expression in tumors is correlated with an increase in mitotic gene expression, and up-regulation of SRRM4 in cancer cell lines dose-dependently inhibits proliferation in vitro and in a mouse xenograft model. Further, this proliferation inhibition is accompanied by induction of neural-like expression and splicing patterns in cancer cells, suggesting that SRRM4 expression shifts the cell state away from proliferation and toward differentiation. We therefore conclude that SRRM4 acts as a proliferation brake, and tumors gain a selective advantage by cutting off this brake. Using data from The Cancer Genome Atlas, this study shows that the splicing factor SRRM4 and its program of differentiation-promoting microexons are downregulated across tumor types with remarkable consistency, providing tumors with a proliferative advantage.
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Affiliation(s)
- Sarah A. Head
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- * E-mail: (SAH); (MHS); (LS)
| | - Xavier Hernandez-Alias
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Jae-Seong Yang
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Centre de Recerca en Agrigenòmica, Consortium CSIC-IRTA-UAB-UB, Cerdanyola del Vallès, Barcelona, Spain
| | - Ludovica Ciampi
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Violeta Beltran-Sastre
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Antonio Torres-Méndez
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Manuel Irimia
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- ICREA, Barcelona, Spain
| | - Martin H. Schaefer
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- IEO European Institute of Oncology IRCCS, Department of Experimental Oncology, Milan, Italy
- * E-mail: (SAH); (MHS); (LS)
| | - Luis Serrano
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- ICREA, Barcelona, Spain
- * E-mail: (SAH); (MHS); (LS)
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5
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Lacerenza S, Ciregia F, Giusti L, Bonotti A, Greco V, Giannaccini G, D'Antongiovanni V, Fallahi P, Pieroni L, Cristaudo A, Lucacchini A, Mazzoni MR, Foddis R. Putative Biomarkers for Malignant Pleural Mesothelioma Suggested by Proteomic Analysis of Cell Secretome. Cancer Genomics Proteomics 2020; 17:225-236. [PMID: 32345664 DOI: 10.21873/cgp.20183] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 01/24/2020] [Accepted: 02/28/2020] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Malignant pleural mesothelioma (MPM) a rare neoplasm linked to asbestos exposure is characterized by a poor prognosis. Soluble mesothelin is currently considered the most specific diagnostic biomarker. The aim of the study was to identify novel biomarkers by proteomic analysis of two MPM cell lines secretome. MATERIALS AND METHODS The protein patterns of MPM cells secretome were examined and compared to a non-malignant mesothelial cell line using two-dimensional gel electrophoresis coupled to mass spectrometry. Serum levels of candidate biomarkers were determined in MPM patients and control subjects. RESULTS Two up-regulated proteins involved in cancer biology, prosaposin and quiescin Q6 sulfhydryl oxidase 1, were considered candidate biomarkers. Serum levels of both proteins were significantly higher in MPM patients than control subjects. Combining the data of each receiver-operating characteristic analysis predicted a good diagnostic accuracy. CONCLUSION A panel of the putative biomarkers represents a promising tool for MPM diagnosis.
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Affiliation(s)
| | - Federica Ciregia
- Department of Pharmacy, University of Pisa, Pisa, Italy.,Department of Rheumatology, GIGA Research, Centre Hospitalier Universitaire (CHU) de Liège, Liège, Belgium
| | - Laura Giusti
- School of Pharmacy, University of Camerino, Camerino, Italy.,Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Alessandra Bonotti
- Department of Translational Research and New Medical and Surgical Technologies, Occupational Medicine Unit, University-Hospital of Pisa, Pisa, Italy
| | - Viviana Greco
- Institute of Biochemistry and Clinical Chemistry, Università Cattolica del Sacro Cuore, Rome, Italy.,Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | | | | | - Poupak Fallahi
- Department of Translational Research and New Medical and Surgical Technologies, Occupational Medicine Unit, University-Hospital of Pisa, Pisa, Italy
| | - Luisa Pieroni
- Proteomics and Metabonomics Unit, IRCCS-Fondazione Santa Lucia, Rome, Italy
| | - Alfonso Cristaudo
- Department of Translational Research and New Medical and Surgical Technologies, Occupational Medicine Unit, University-Hospital of Pisa, Pisa, Italy
| | - Antonio Lucacchini
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | | | - Rudy Foddis
- Department of Translational Research and New Medical and Surgical Technologies, Occupational Medicine Unit, University-Hospital of Pisa, Pisa, Italy
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6
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Tkáčiková S, Talian I, Sabo J. Optimisation of urine sample preparation for shotgun proteomics. OPEN CHEM 2020. [DOI: 10.1515/chem-2020-0150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractUrine reflects the renal function and urinary and kidney systems, but it may also reflect the presence of cancer in other parts of the body. Urine also has potential for providing prognostic information during therapeutic treatments thanks to non-invasive monitoring. A quick and reproducible protein purification procedure is essential to allow data comparison between proteomic studies in urine biomarker discovery. The article describes a simple, reproducible and cheap sample preparation procedure with a maximum protein yield (400 µg) obtained from only 10 mL of urine utilising cut-off filter desalting and digestion. The reported procedure removes yellowish background coloration residues and thus prevents the errors in spectrophotometric protein concentration determination. Different extraction solvents used in the presented procedure point to the possibility of partial elimination of abundant proteins (albumin and keratin family), as well as to the improvement of the sequence coverage of proteins identified, which helps to reveal changes in the urinary proteome. With this workflow, proteins can be easily obtained on standard laboratory equipment within 3 h. Data are available via ProteomeXchange with identifier PXD019738.
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Affiliation(s)
- Soňa Tkáčiková
- Department of Medical and Clinical Biophysics, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, tr. SNP 1, 040 11 Košice, Slovakia
| | - Ivan Talian
- Department of Medical and Clinical Biophysics, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, tr. SNP 1, 040 11 Košice, Slovakia
| | - Ján Sabo
- Department of Medical and Clinical Biophysics, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, tr. SNP 1, 040 11 Košice, Slovakia
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7
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Kim JY, Choi JK, Jung H. Genome-wide methylation patterns predict clinical benefit of immunotherapy in lung cancer. Clin Epigenetics 2020; 12:119. [PMID: 32762727 PMCID: PMC7410160 DOI: 10.1186/s13148-020-00907-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 07/20/2020] [Indexed: 02/06/2023] Open
Abstract
Background It is crucial to unravel molecular determinants of responses to immune checkpoint blockade (ICB) therapy because only a small subset of advanced non-small cell lung cancer (NSCLC) patients responds to ICB therapy. Previous studies were concentrated on genomic and transcriptomic markers (e.g., mutation burden and immune gene expression). However, these markers are not sufficient to accurately predict a response to ICB therapy. Results Here, we analyzed DNA methylomes of 141 advanced NSCLC samples subjected to ICB therapy (i.e., anti-programmed death-1) from two independent cohorts (60 and 81 patients from our and IDIBELL cohorts). Integrative analysis of patients with matched transcriptome data in our cohort (n = 28) at pathway level revealed significant overlaps between promoter hypermethylation and transcriptional repression in nonresponders relative to responders. Fifteen immune-related pathways, including interferon signaling, were identified to be enriched for both hypermethylation and repression. We built a reliable prognostic risk model based on eight genes using LASSO model and successfully validated the model in independent cohorts. Furthermore, we found 30 survival-associated molecular interaction networks, in which two or three hypermethylated genes showed significant mutual exclusion across nonresponders. Conclusions Our study demonstrates that methylation patterns can provide insight into molecular determinants underlying the clinical benefit of ICB therapy.
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Affiliation(s)
- Jeong Yeon Kim
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, Republic of Korea
| | - Jung Kyoon Choi
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, Republic of Korea. .,Penta Medix Co., Ltd., Seongnam-si, Gyeongi-do, 13449, Republic of Korea.
| | - Hyunchul Jung
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, Republic of Korea. .,Cancer Ageing and Somatic Mutation Programme, Wellcome Sanger Institute, Cambridge, UK.
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8
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Hallal S, Azimi A, Wei H, Ho N, Lee MYT, Sim HW, Sy J, Shivalingam B, Buckland ME, Alexander-Kaufman KL. A Comprehensive Proteomic SWATH-MS Workflow for Profiling Blood Extracellular Vesicles: A New Avenue for Glioma Tumour Surveillance. Int J Mol Sci 2020; 21:ijms21134754. [PMID: 32635403 PMCID: PMC7369771 DOI: 10.3390/ijms21134754] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/01/2020] [Accepted: 07/01/2020] [Indexed: 12/13/2022] Open
Abstract
Improving outcomes for diffuse glioma patients requires methods that can accurately and sensitively monitor tumour activity and treatment response. Extracellular vesicles (EV) are membranous nanoparticles that can traverse the blood-brain-barrier, carrying oncogenic molecules into the circulation. Measuring clinically relevant glioma biomarkers cargoed in circulating EVs could revolutionise how glioma patients are managed. Despite their suitability for biomarker discovery, the co-isolation of highly abundant complex blood proteins has hindered comprehensive proteomic studies of circulating-EVs. Plasma-EVs isolated from pre-operative glioma grade II-IV patients (n = 41) and controls (n = 11) were sequenced by Sequential window acquisition of all theoretical fragment ion spectra mass spectrometry (SWATH-MS) and data extraction was performed by aligning against a custom 8662-protein library. Overall, 4054 proteins were measured in plasma-EVs. Differentially expressed proteins and putative circulating-EV markers were identified (adj. p-value < 0.05), including those reported in previous in-vitro and ex-vivo glioma-EV studies. Principal component analysis showed that plasma-EV protein profiles clustered according to glioma histological-subtype and grade, and plasma-EVs resampled from patients with recurrent tumour progression grouped with more aggressive glioma samples. The extensive plasma-EV proteome profiles achieved here highlight the potential for SWATH-MS to define circulating-EV biomarkers for objective blood-based measurements of glioma activity that could serve as ideal surrogate endpoints to assess tumour progression and allow more dynamic, patient-centred treatment protocols.
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Affiliation(s)
- Susannah Hallal
- Neurosurgery Department, Chris O’Brien Lifehouse, Camperdown 2050, Australia; (S.H.); (B.S.)
- Brainstorm Brain Cancer Research, Brain and Mind Centre, The University of Sydney, Camperdown 2050, Australia; (H.W.); (N.H.); (M.Y.T.L.); (M.E.B.)
- Discipline of Pathology, School of Medical Sciences, The University of Sydney, Sydney 2006, Australia
- Neuropathology Department, Royal Prince Alfred Hospital, Camperdown 2050, Australia;
| | - Ali Azimi
- Dermatology Department, School of Medical Sciences, The University of Sydney, Westmead 2145, Australia;
| | - Heng Wei
- Brainstorm Brain Cancer Research, Brain and Mind Centre, The University of Sydney, Camperdown 2050, Australia; (H.W.); (N.H.); (M.Y.T.L.); (M.E.B.)
- Neuropathology Department, Royal Prince Alfred Hospital, Camperdown 2050, Australia;
| | - Nicholas Ho
- Brainstorm Brain Cancer Research, Brain and Mind Centre, The University of Sydney, Camperdown 2050, Australia; (H.W.); (N.H.); (M.Y.T.L.); (M.E.B.)
| | - Maggie Yuk Ting Lee
- Brainstorm Brain Cancer Research, Brain and Mind Centre, The University of Sydney, Camperdown 2050, Australia; (H.W.); (N.H.); (M.Y.T.L.); (M.E.B.)
- Neuropathology Department, Royal Prince Alfred Hospital, Camperdown 2050, Australia;
| | - Hao-Wen Sim
- Department of Medical Oncology, Chris O’Brien Lifehouse, Camperdown 2050, Australia;
- NHMRC Clinical Trials Centre, University of Sydney, Camperdown 2050, Australia
- The Kinghorn Cancer Centre, St Vincent’s Hospital, Darlinghurst 2010, Australia
| | - Joanne Sy
- Neuropathology Department, Royal Prince Alfred Hospital, Camperdown 2050, Australia;
| | - Brindha Shivalingam
- Neurosurgery Department, Chris O’Brien Lifehouse, Camperdown 2050, Australia; (S.H.); (B.S.)
- Brainstorm Brain Cancer Research, Brain and Mind Centre, The University of Sydney, Camperdown 2050, Australia; (H.W.); (N.H.); (M.Y.T.L.); (M.E.B.)
| | - Michael Edward Buckland
- Brainstorm Brain Cancer Research, Brain and Mind Centre, The University of Sydney, Camperdown 2050, Australia; (H.W.); (N.H.); (M.Y.T.L.); (M.E.B.)
- Discipline of Pathology, School of Medical Sciences, The University of Sydney, Sydney 2006, Australia
- Neuropathology Department, Royal Prince Alfred Hospital, Camperdown 2050, Australia;
| | - Kimberley Louise Alexander-Kaufman
- Neurosurgery Department, Chris O’Brien Lifehouse, Camperdown 2050, Australia; (S.H.); (B.S.)
- Brainstorm Brain Cancer Research, Brain and Mind Centre, The University of Sydney, Camperdown 2050, Australia; (H.W.); (N.H.); (M.Y.T.L.); (M.E.B.)
- Discipline of Pathology, School of Medical Sciences, The University of Sydney, Sydney 2006, Australia
- Neuropathology Department, Royal Prince Alfred Hospital, Camperdown 2050, Australia;
- Correspondence: ; Tel.: +61-2-8514-0675
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9
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Liu C, Zhong X, Li J, Xu F. Circular RNA circVAPA Promotes Cell Proliferation in Hepatocellular Carcinoma. HUM GENE THER CL DEV 2019; 30:152-159. [PMID: 31368365 DOI: 10.1089/humc.2019.079] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the most common malignancy in liver and is one of the leading causes of cancer-induced deaths all over the world. Circular RNAs (circRNAs) have been proven to be related to cancer initiation and progression in mounting reports. However, research on the role of circRNAs in human cancers, including HCC, is still in its infancy. circVAPA has been unmasked as oncogenic in colorectal cancer. Yet the function of circVAPA in HCC has never been elucidated. circVAPA, miR-377-3p, and prosaposin (PSAP) mRNA expression levels were detected by real-time quantitative PCR. PSAP protein levels were measured by Western blot. Cell proliferation was evaluated by CCK-8, colony formation, and EdU assays. Binding capacity was assessed by dual-luciferase reporter assay. circVAPA was upregulated in HCC cell lines and circVAPA depletion was associated with decreased HCC cell proliferation. circVAPA promotes PSAP expression through sequestering miR-377-3p. The suppression of HCC cell proliferation caused by circVAPA silence was revived by PSAP overexpression. This study revealed that circVAPA contributes to HCC cell proliferation through sponging miR-377-3p and thereby disinhibiting PSAP, shedding light on a new insight into HCC initiation and progression.
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Affiliation(s)
- Caifeng Liu
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
| | - Xingyang Zhong
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
| | - Jun Li
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
| | - Feng Xu
- Department of Hepatic Surgery, Third Affiliated Hospital of Second Military Medical University, Shanghai, China
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10
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Jiang Y, Zhou J, Hou D, Luo P, Gao H, Ma Y, Chen YS, Li L, Zou D, Zhang H, Zhang Y, Jing Z. Prosaposin is a biomarker of mesenchymal glioblastoma and regulates mesenchymal transition through the TGF-β1/Smad signaling pathway. J Pathol 2019; 249:26-38. [PMID: 30953361 DOI: 10.1002/path.5278] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/21/2019] [Accepted: 04/04/2019] [Indexed: 12/15/2022]
Abstract
Mesenchymal glioblastoma (GBM) is the most aggressive subtype of GBM. Our previous study found that neurotrophic factor prosaposin (PSAP) is highly expressed and secreted in glioma and can promote the growth of glioma. The role of PSAP in mesenchymal GBM is still unclear. In this study, bioinformatic analysis, western blotting and RT-qPCR were used to detect the expression of PSAP in different GBM subtypes. Human glioma cell lines and patient-derived glioma stem cells were studied in vitro and in vivo, revealing that mesenchymal GBM expressed and secreted the highest level of PSAP among four subtypes of GBM, and PSAP could promote GBM invasion and epithelial-mesenchymal transition (EMT)-like processes in vivo and in vitro. Bioinformatic analysis and western blotting showed that PSAP mainly played a regulatory role in GBM invasion and EMT-like processes via the TGF-β1/Smad signaling pathway. In conclusion, the overexpression and secretion of PSAP may be an important factor causing the high invasiveness of mesenchymal GBM. PSAP is therefore a potential target for the treatment of mesenchymal GBM. © 2019 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Yang Jiang
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang City, PR China.,Department of Neurosurgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China
| | - Jinpeng Zhou
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang City, PR China
| | - Dianqi Hou
- Department of Neurosurgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China
| | - Peng Luo
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang City, PR China
| | - Huiling Gao
- College of Life and Health Sciences, Northeastern University, Shenyang, PR China
| | - Yanju Ma
- Department of Medical Oncology, Cancer Hospital of China Medical University, Shenyang, PR China
| | - Yin-Sheng Chen
- Department of Neurosurgery/Neuro-oncology, SunYat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China
| | - Long Li
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang City, PR China
| | - Dan Zou
- The First laboratory of cancer institute, the First Hospital of China Medical University, Shenyang City, PR China
| | - Haiying Zhang
- International Education College, Liaoning University of Traditional Chinese Medicine, Shenyang City, PR China
| | - Ye Zhang
- The First laboratory of cancer institute, the First Hospital of China Medical University, Shenyang City, PR China
| | - Zhitao Jing
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang City, PR China
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11
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Jiang Y, Zhou J, Luo P, Gao H, Ma Y, Chen YS, Li L, Zou D, Zhang Y, Jing Z. Prosaposin promotes the proliferation and tumorigenesis of glioma through toll-like receptor 4 (TLR4)-mediated NF-κB signaling pathway. EBioMedicine 2018; 37:78-90. [PMID: 30385233 PMCID: PMC6286187 DOI: 10.1016/j.ebiom.2018.10.053] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 10/17/2018] [Accepted: 10/22/2018] [Indexed: 02/07/2023] Open
Abstract
Background As a neurotrophic factor, prosaposin (PSAP) can exert neuroprotective and neurotrophic effects. It is involved in the occurrence and development of prostate and breast cancer. However, there is no research about the role of PSAP in glioma. Methods The PSAP overexpressed or silenced glioma cells or glioma stem cells were established based on Lentiviral vector transfection. Cell viability assay, Edu assay, neurosphere formation assay and xenograft experiments were used to detect the proliferative ability. Western blot, Elisa and luciferase reporter assays were used to detect the possible mechanism. Findings Our study firstly found that PSAP was highly expressed and secreted in clinical glioma specimens, glioma stem cells, and glioma cell lines. It was associated with poor prognosis. We found that PSAP significantly promoted the proliferation of glioma stem cells and cell lines. Moreover, PSAP promoted tumorigenesis in subcutaneous and orthotopic models of this disease. Furthermore, GSEA and KEGG analysis predicted that PSAP acts through the TLR4 and NF-κB signaling pathways, which was confirmed by western blot, immunoprecipitation, immunofluorescence, and use of the TLR4-specific inhibitor TAK-242. Interpretation The findings of this study suggest that PSAP can promote glioma cell proliferation via the TLR4/NF-κB signaling pathway and may be an important target for glioma treatment. Fund This work was funded by National Natural Science Foundation of China (Nos. 81101917, 81270036, 81201802, 81673025), Program for Liaoning Excellent Talents in University (No. LR2014023), and Liaoning Province Natural Science Foundation (Nos. 20170541022, 20172250290). The funders did not play a role in manuscript design, data collection, data analysis, interpretation nor writing of the manuscript.
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Affiliation(s)
- Yang Jiang
- Department of Neurosurgery, The First Hospital of China Medical University, NO.155, North Nanjing Street, Heping District, Shenyang City 110001, China
| | - Jinpeng Zhou
- Department of Neurosurgery, The First Hospital of China Medical University, NO.155, North Nanjing Street, Heping District, Shenyang City 110001, China
| | - Peng Luo
- Department of Neurosurgery, The First Hospital of China Medical University, NO.155, North Nanjing Street, Heping District, Shenyang City 110001, China
| | - Huiling Gao
- College of Life and Health Sciences, Northeastern University, Shenyang, China
| | - Yanju Ma
- Department of Medical Oncology, Cancer Hospital of China Medical University, Shenyang 110042, China
| | - Yin-Sheng Chen
- Department of Neurosurgery/Neuro-oncology, SunYat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - Long Li
- Department of Neurosurgery, The First Hospital of China Medical University, NO.155, North Nanjing Street, Heping District, Shenyang City 110001, China
| | - Dan Zou
- The First laboratory of cancer institute, The First Hospital of China Medical University, NO.155, North Nanjing Street, Heping District, Shenyang City 110001, China
| | - Ye Zhang
- The First laboratory of cancer institute, The First Hospital of China Medical University, NO.155, North Nanjing Street, Heping District, Shenyang City 110001, China.
| | - Zhitao Jing
- Department of Neurosurgery, The First Hospital of China Medical University, NO.155, North Nanjing Street, Heping District, Shenyang City 110001, China.
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12
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Nanjappa V, Raja R, Radhakrishnan A, Jain AP, Datta KK, Puttamallesh VN, Solanki HS, Chavan S, Patil A, Renuse S, Jain A, Mathew D, Thakur R, Guerrero-Preston R, Nair B, Routray S, Mohanty N, Gowda KBL, Jadav R, Ghosal S, Kumar RV, Ramesha C, Raghu VC, Mathur PP, Prasad TSK, Califano JA, Sidransky D, Pal A, Ganesh MS, Ray JG, Pandey A, Gowda H, Chatterjee A. Testican 1 (SPOCK1) and protein tyrosine phosphatase, receptor type S (PTPRS) show significant increase in saliva of tobacco users with oral cancer. TRANSLATIONAL RESEARCH IN ORAL ONCOLOGY 2018. [DOI: 10.1177/2057178x18800534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objectives: To identify potential candidate proteins which are secretory in nature and present at a higher abundance in oral cancer patients with tobacco habits. Methods: Conditioned media of tobacco-treated and -untreated non-neoplastic oral keratinocytes were analyzed using iTRAQ-based mass spectrometry. Hypersecreted proteins; SPARC (osteonectin), cwcv and kazal like domains proteoglycan 1 (SPOCK1); prosaposin (PSAP); and protein tyrosine phosphatase, receptor type S (PTPRS) were validated by enzyme-linked immunosorbent assay (ELISA) using saliva samples from oral cancer patients who are tobacco users. Results: Proteomic analysis of tobacco-treated and -untreated cells led to the identification of 2873 proteins. Among these, 378 proteins showed high abundance and 253 proteins showed low abundance (2-fold cutoff) in conditioned-media of tobacco-treated cells. ELISA-based validation showed significantly higher levels of SPOCK1, PSAP, and PTPRS in oral cancer patients with tobacco chewing habits compared to healthy controls. However, PSAP showed low specificity compared to SPOCK1 and PTPRS. Conclusions: This study indicates significantly increased levels of SPOCK1, PSAP, and PTPRS in saliva of oral cancer patients with tobacco habits. These protein biomarkers might be useful to identify tobacco users with high risk of developing oral cancers.
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Affiliation(s)
- Vishalakshi Nanjappa
- Institute of Bioinformatics, Bangalore, Karnataka, India
- Amrita School of Biotechnology, Amrita University, Kollam, Kerala, India
| | - Remya Raja
- Institute of Bioinformatics, Bangalore, Karnataka, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
| | | | - Ankit P Jain
- Institute of Bioinformatics, Bangalore, Karnataka, India
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
| | | | - Vinuth N Puttamallesh
- Institute of Bioinformatics, Bangalore, Karnataka, India
- Amrita School of Biotechnology, Amrita University, Kollam, Kerala, India
| | - Hitendra S Solanki
- Institute of Bioinformatics, Bangalore, Karnataka, India
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
| | - Sandip Chavan
- Institute of Bioinformatics, Bangalore, Karnataka, India
| | - Arun Patil
- Institute of Bioinformatics, Bangalore, Karnataka, India
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
| | - Santosh Renuse
- Institute of Bioinformatics, Bangalore, Karnataka, India
| | - Anu Jain
- Department of Biochemistry, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Don Mathew
- Department of Radiotherapy, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Reetu Thakur
- Department of Radiotherapy, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Rafael Guerrero-Preston
- Head and Neck Cancer Research Division, Otolaryngology Department, School of Medicine, The Johns Hopkins University, Baltimore, USA
- Department of Obstetrics and Gynecology, University of Puerto Rico School of Medicine, San Juan, Puerto Rico, USA
| | - Bipin Nair
- Amrita School of Biotechnology, Amrita University, Kollam, Kerala, India
| | - Samapika Routray
- Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha’O’Anusandhan University, Bhubaneswar, Odisha, India
- Department of Dental Surgery, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
| | - Neeta Mohanty
- Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha’O’Anusandhan University, Bhubaneswar, Odisha, India
| | - KB Linge Gowda
- Department of Anesthetic and Pain Relief, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - Ritesh Jadav
- Deparment of Oral Pathology, Dr. R. Ahmed Dental College & Hospital, Kolkata, West Bengal, India
| | - Sushmita Ghosal
- Department of Radiotherapy, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Rekha V Kumar
- Department of Pathology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - Chaluvarayaswamy Ramesha
- Department of Epidemiology and Biostatistics, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - Vijay C Raghu
- Department of Epidemiology and Biostatistics, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - Premendu Prakash Mathur
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
- Department of Biochemistry and Molecular Biology, Pondicherry University, Pondicherry, India
| | - TS Keshava Prasad
- Institute of Bioinformatics, Bangalore, Karnataka, India
- Amrita School of Biotechnology, Amrita University, Kollam, Kerala, India
- YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore, Karnataka, India
| | - Joseph A Califano
- Head and Neck Cancer Research Division, Otolaryngology Department, School of Medicine, The Johns Hopkins University, Baltimore, USA
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, Moores Cancer Center, University of California, San Diego, California, USA
| | - David Sidransky
- Head and Neck Cancer Research Division, Otolaryngology Department, School of Medicine, The Johns Hopkins University, Baltimore, USA
| | - Arnab Pal
- Department of Biochemistry, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Mandakulutur S Ganesh
- Department of Surgical Oncology, Vydehi Institute of Oncology, Bangalore, Karnataka, India
| | - Jay Gopal Ray
- Deparment of Oral Pathology, Dr. R. Ahmed Dental College & Hospital, Kolkata, West Bengal, India
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Departments of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Harsha Gowda
- Institute of Bioinformatics, Bangalore, Karnataka, India
- YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore, Karnataka, India
| | - Aditi Chatterjee
- Institute of Bioinformatics, Bangalore, Karnataka, India
- YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore, Karnataka, India
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Quantitative evolutionary proteomics of seminal fluid from primates with different mating systems. BMC Genomics 2018; 19:488. [PMID: 29929489 PMCID: PMC6014011 DOI: 10.1186/s12864-018-4872-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 06/15/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Genomic data from various organisms have been used to study how sexual selection has shaped genetic diversity in reproductive proteins, and in particular, to elucidate how mating systems may have influenced evolution at the molecular and phenotypic levels. However, large-scale proteomic data including protein identifications and abundances are only now entering the field of evolutionary and comparative genomics. Variation in both protein sequence and expression level may play important roles in the evolution of sexual traits and behaviors. RESULTS Here, we broadly analyze the components of seminal fluid from primates with diverse mating systems ranging from monogamous to polygynous, and include genomics, proteomics, phylogenetic and quantitative characters into our framework. Our analyses show that seminal fluid proteins are undergoing rapid evolution and some of these quickly evolving proteins may be influenced by sexual selection. Through evolutionary analyses and protein abundance differences, we identified 84 genes whose evolutionary rates or expression levels were correlated with mating system and other sexual characters. We found that many proteins differ in abundance between monogamous and polygynous primate mating systems. Many of these proteins are enriched in the copulatory plug pathway, which suggests that post-zygotic selective barriers are important regardless of mating system type. CONCLUSIONS This work is the first to comprehensively compare seminal fluid proteins between human and non-human primates using high-throughput proteomics. Our findings highlight the impact of mating system variation on seminal fluid protein evolution and abundance.
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14
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García-Rodríguez A, de la Casa M, Peinado H, Gosálvez J, Roy R. Human prostasomes from normozoospermic and non-normozoospermic men show a differential protein expression pattern. Andrology 2018; 6:585-596. [DOI: 10.1111/andr.12496] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 03/20/2018] [Accepted: 03/28/2018] [Indexed: 12/11/2022]
Affiliation(s)
| | | | - H. Peinado
- Microenvironment and Metastasis Group; Molecular Oncology Program; Spanish National Cancer Research Centre (CNIO); Madrid Spain
| | - J. Gosálvez
- Biology Department; University Autónoma of Madrid; Madrid Spain
| | - R. Roy
- Biology Department; University Autónoma of Madrid; Madrid Spain
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15
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Kashiba M, Terashima M, Sagawa T, Yoshimura S, Yamamoto Y. Prosaposin knockdown in Caco-2 cells decreases cellular levels of coenzyme Q10 and ATP, and results in the loss of tight junction barriers. J Clin Biochem Nutr 2016; 60:81-85. [PMID: 28366985 PMCID: PMC5370525 DOI: 10.3164/jcbn.16-32] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 08/02/2016] [Indexed: 11/22/2022] Open
Abstract
Coenzyme Q10 (CoQ10) is a key component of the mitochondrial electron transfer chain and is one of the most important antioxidants. We previously found that glycoprotein prosaposin (Psap) binds CoQ10 in human cells. Although Psap is expressed in the intestines, its role in the gastrointestinal tract is not clear. To elucidate the role of Psap in the intestines, we established Psap knockdown (KD) Caco-2 cells, which are an intestinal epithelial cell line. Cellular CoQ10 levels decreased significantly in Psap KD Caco-2 cells as compared to parental Caco-2 cells. Cellular ATP levels also decreased significantly in Psap KD Caco-2 cells as compared to parental Caco-2 cells. Lower ATP levels in the intestines have been reported to result in the failure of tight junction formation. As expected, Psap KD Caco-2 monolayers did not produce transepithelial electrical resistance, while parental Caco-2 monolayers did. Moreover, a fluorescent dye, lucifer yellow, leaked out through Psap KD Caco-2 monolayers, whereas it did not through parental Caco-2 monolayers. These results indicate that Psap is essential to maintain cellular levels of CoQ10 and ATP, and consequently to form tight junctions in the gastrointestinal tract.
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Affiliation(s)
- Misato Kashiba
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura-cho, Hachioji-shi, Tokyo 192-0982, Japan
| | - Masayuki Terashima
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura-cho, Hachioji-shi, Tokyo 192-0982, Japan
| | - Tomofumi Sagawa
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura-cho, Hachioji-shi, Tokyo 192-0982, Japan
| | - Shinichi Yoshimura
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura-cho, Hachioji-shi, Tokyo 192-0982, Japan
| | - Yorihiro Yamamoto
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura-cho, Hachioji-shi, Tokyo 192-0982, Japan
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16
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Shah P, Wang X, Yang W, Toghi Eshghi S, Sun S, Hoti N, Chen L, Yang S, Pasay J, Rubin A, Zhang H. Integrated Proteomic and Glycoproteomic Analyses of Prostate Cancer Cells Reveal Glycoprotein Alteration in Protein Abundance and Glycosylation. Mol Cell Proteomics 2015; 14:2753-63. [PMID: 26256267 DOI: 10.1074/mcp.m115.047928] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Indexed: 12/31/2022] Open
Abstract
Prostate cancer is the most common cancer among men in the U.S. and worldwide, and androgen-deprivation therapy remains the principal treatment for patients. Although a majority of patients initially respond to androgen-deprivation therapy, most will eventually develop castration resistance. An increased understanding of the mechanisms that underline the pathogenesis of castration resistance is therefore needed to develop novel therapeutics. LNCaP and PC3 prostate cancer cell lines are models for androgen-dependence and androgen-independence, respectively. Herein, we report the comparative analysis of these two prostate cancer cell lines using integrated global proteomics and glycoproteomics. Global proteome profiling of the cell lines using isobaric tags for relative and absolute quantitation (iTRAQ) labeling and two- dimensional (2D) liquid chromatography-tandem MS (LC-MS/MS) led to the quantification of 8063 proteins. To analyze the glycoproteins, glycosite-containing peptides were isolated from the same iTRAQ-labeled peptides from the cell lines using solid phase extraction followed by LC-MS/MS analysis. Among the 1810 unique N-linked glycosite-containing peptides from 653 identified N-glycoproteins, 176 glycoproteins were observed to be different between the two cell lines. A majority of the altered glycoproteins were also observed with changes in their global protein expression levels. However, alterations in 21 differentially expressed glycoproteins showed no change at the protein abundance level, indicating that the glycosylation site occupancy was different between the two cell lines. To determine the glycosylation heterogeneity at specific glycosylation sites, we further identified and quantified 1145 N-linked glycopeptides with attached glycans in the same iTRAQ-labeled samples. These intact glycopeptides contained 67 glycan compositions and showed increased fucosylation in PC3 cells in several of the examined glycosylation sites. The increase in fucosylation could be caused by the detected changes in enzymes belonging to the glycan biosynthesis pathways of protein fucosylation observed in our proteomic analysis. The altered protein fucosylation forms have great potential in aiding our understanding of castration resistance and may lead to the development of novel therapeutic approaches and specific detection strategies for prostate cancer.
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Affiliation(s)
- Punit Shah
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Xiangchun Wang
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Weiming Yang
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Shadi Toghi Eshghi
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Shisheng Sun
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Naseruddin Hoti
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Lijun Chen
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Shuang Yang
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Jered Pasay
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Abby Rubin
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
| | - Hui Zhang
- From the ‡Department of Pathology, Johns Hopkins University, Baltimore, Maryland 21287
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Ali S, Shourideh M, Koochekpour S. Identification of novel GRM1 mutations and single nucleotide polymorphisms in prostate cancer cell lines and tissues. PLoS One 2014; 9:e103204. [PMID: 25062106 PMCID: PMC4111546 DOI: 10.1371/journal.pone.0103204] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 06/25/2014] [Indexed: 11/18/2022] Open
Abstract
Metabotropic glutamate receptor 1 (GRM1) signaling has been implicated in benign and malignant disorders including prostate cancer (PCa). To further explore the role of genetic alterations of GRM1 in PCa, we screened the entire human GRM1 gene including coding sequence, exon-intron junctions, and flanking untranslated regions (UTRs) for the presence of mutations and single nucleotide polymorphisms (SNPs) in several PCa cell lines and matched tumor-normal tissues from Caucasian Americans (CAs) and African Americans (AAs). We used bidirectional sequencing, allele-specific PCR, and bioinformatics to identify the genetic changes in GRM1 and to predict their functional role. A novel missense mutation identified at C1744T (582 Pro > Ser) position of GRM1 gene in a primary AA-PCa cell line (E006AA) was predicted to affect the protein stability and functions. Another novel mutation identified at exon-intron junction of exon-8 in C4-2B cell line resulted in alteration of the GRM1 splicing donor site. In addition, we found missense SNP at T2977C (993 Ser > Pro) position and multiple non-coding mutations and SNPs in 3'-UTR of GRM1 gene in PCa cell lines and tissues. These novel mutations may contribute to the disease by alterations in GRM1 gene splicing, receptor activation, and post-receptor downstream signaling.
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Affiliation(s)
- Shafat Ali
- Departments of Cancer Genetics, Center for Genetics and Pharmacology, Roswell Park Cancer Institute, Buffalo, New York, United States of America
| | - Mojgan Shourideh
- Departments of Cancer Genetics, Center for Genetics and Pharmacology, Roswell Park Cancer Institute, Buffalo, New York, United States of America
| | - Shahriar Koochekpour
- Departments of Cancer Genetics, Center for Genetics and Pharmacology, Roswell Park Cancer Institute, Buffalo, New York, United States of America
- Departments of Urology, Center for Genetics and Pharmacology, Roswell Park Cancer Institute, Buffalo, New York, United States of America
- * E-mail:
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18
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Boswell CA, Mundo EE, Firestein R, Zhang C, Mao W, Gill H, Young C, Ljumanovic N, Stainton S, Ulufatu S, Fourie A, Kozak KR, Fuji R, Polakis P, Khawli LA, Lin K. An integrated approach to identify normal tissue expression of targets for antibody-drug conjugates: case study of TENB2. Br J Pharmacol 2013; 168:445-57. [PMID: 22889168 DOI: 10.1111/j.1476-5381.2012.02138.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Revised: 07/26/2012] [Accepted: 08/08/2012] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE The success of antibody-drug conjugates (ADCs) depends on the therapeutic window rendered by the differential expression between normal and pathological tissues. The ability to identify and visualize target expression in normal tissues could reveal causes for target-mediated clearance observed in pharmacokinetic characterization. TENB2 is a prostate cancer target associated with the progression of poorly differentiated and androgen-independent tumour types, and ADCs specific for TENB2 are candidate therapeutics. The objective of this study was to locate antigen expression of TENB2 in normal tissues, thereby elucidating the underlying causes of target-mediated clearance. EXPERIMENTAL APPROACH A series of pharmacokinetics, tissue distribution and mass balance studies were conducted in mice using a radiolabelled anti-TENB2 ADC. These data were complemented by non-invasive single photon emission computed tomography - X-ray computed tomography imaging and immunohistochemistry. KEY RESULTS The intestines were identified as a saturable and specific antigen sink that contributes, at least in part, to the rapid target-mediated clearance of the anti-TENB2 antibody and its drug conjugate in rodents. As a proof of concept, we also demonstrated the selective disposition of the ADC in a tumoural environment in vivo using the LuCaP 77 transplant mouse model. High tumour uptake was observed despite the presence of the antigen sink, and antigen specificity was confirmed by antigen blockade. CONCLUSIONS AND IMPLICATIONS Our findings provide the anatomical location and biological interpretation of target-mediated clearance of anti-TENB2 antibodies and corresponding drug conjugates. Further investigations may be beneficial in addressing the relative contributions to ADC disposition from antigen expression in both normal and pathological tissues.
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Affiliation(s)
- C Andrew Boswell
- Genentech Research and Early Development, South San Francisco, CA 94080, USA
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Jayapalan JJ, Ng KL, Shuib AS, Razack AHA, Hashim OH. Urine of patients with early prostate cancer contains lower levels of light chain fragments of inter-alpha-trypsin inhibitor and saposin B but increased expression of an inter-alpha-trypsin inhibitor heavy chain 4 fragment. Electrophoresis 2013; 34:1663-9. [PMID: 23417432 DOI: 10.1002/elps.201200583] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 12/03/2012] [Accepted: 12/04/2012] [Indexed: 01/20/2023]
Abstract
The present study was aimed at the identification of proteins that are differentially expressed in the urine of patients with prostate cancer (PCa), those with benign prostatic hyperplasia (BPH) and age-matched healthy male control subjects. Using a combination of 2DE and MS/MS, significantly lower expression of urinary saposin B and two different fragments of inter-alpha-trypsin inhibitor light chain (ITIL) was demonstrated in the PCa patients compared to the controls. However, only one of the ITIL fragments was significantly different between the PCa and BPH patients. When image analysis was performed on urinary proteins that were transferred onto NC membranes and detected using a lectin that binds to O-glycans, a truncated fragment of inter-alpha-trypsin inhibitor heavy chain 4 was the sole protein found to be significantly enhanced in the PCa patients compared to the controls. Together, these urinary peptide fragments might be useful complementary biomarkers to indicate PCa as well as to distinguish it from BPH, although further epidemiological evidence on the specificity and sensitivity of the protein candidates is required.
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Affiliation(s)
- Jaime J Jayapalan
- University of Malaya Centre for Proteomics Research, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
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Caceres NE, Aerts M, Marquez B, Mingeot-Leclercq MP, Tulkens PM, Devreese B, Van Bambeke F. Analysis of the membrane proteome of ciprofloxacin-resistant macrophages by stable isotope labeling with amino acids in cell culture (SILAC). PLoS One 2013; 8:e58285. [PMID: 23505477 PMCID: PMC3591400 DOI: 10.1371/journal.pone.0058285] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Accepted: 02/01/2013] [Indexed: 12/21/2022] Open
Abstract
Overexpression of multidrug transporters is a well-established mechanism of resistance to chemotherapy, but other changes may be co-selected upon exposure to drugs that contribute to resistance. Using a model of J774 macrophages made resistant to the fluoroquinolone antibiotic ciprofloxacin and comparing it with the wild-type parent cell line, we performed a quantitative proteomic analysis using the stable isotope labeling with amino acids in cell culture technology coupled with liquid chromatography electrospray ionization Fourier transform tandem mass spectrometry (LC-ESI-FT-MS/MS) on 2 samples enriched in membrane proteins (fractions F1 and F2 collected from discontinuous sucrose gradient). Nine hundred proteins were identified with at least 3 unique peptides in these 2 pooled fractions among which 61 (F1) and 69 (F2) showed a significantly modified abundance among the 2 cell lines. The multidrug resistance associated protein Abcc4, known as the ciprofloxacin efflux transporter in these cells, was the most upregulated, together with Dnajc3, a protein encoded by a gene located downstream of Abcc4. The other modulated proteins are involved in transport functions, cell adhesion and cytoskeleton organization, immune response, signal transduction, and metabolism. This indicates that the antibiotic ciprofloxacin is able to trigger a pleiotropic adaptative response in macrophages that includes the overexpression of its efflux transporter.
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Affiliation(s)
- Nancy E. Caceres
- Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
| | - Maarten Aerts
- Laboratorium voor Eiwitbiochemie en Biomoleculaire Engineering, Universiteit Gent, Belgium
| | - Béatrice Marquez
- Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
| | - Marie-Paule Mingeot-Leclercq
- Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
| | - Paul M. Tulkens
- Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
| | - Bart Devreese
- Laboratorium voor Eiwitbiochemie en Biomoleculaire Engineering, Universiteit Gent, Belgium
| | - Françoise Van Bambeke
- Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
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21
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Koochekpour S, Majumdar S, Azabdaftari G, Attwood K, Scioneaux R, Subramani D, Manhardt C, Lorusso GD, Willard SS, Thompson H, Shourideh M, Rezaei K, Sartor O, Mohler JL, Vessella RL. Serum glutamate levels correlate with Gleason score and glutamate blockade decreases proliferation, migration, and invasion and induces apoptosis in prostate cancer cells. Clin Cancer Res 2012; 18:5888-901. [PMID: 23072969 DOI: 10.1158/1078-0432.ccr-12-1308] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE During glutaminolysis, glutamine is catabolized to glutamate and incorporated into citric acid cycle and lipogenesis. Serum glutamate levels were measured in patients with primary prostate cancer or metastatic castrate-resistant prostate cancer (mCRPCa) to establish clinical relevance. The effect of glutamate deprivation or blockade by metabotropic glutamate receptor 1 (GRM1) antagonists was investigated on prostate cancer cells' growth, migration, and invasion to establish biologic relevance. EXPERIMENTAL DESIGN Serum glutamate levels were measured in normal men (n = 60) and patients with primary prostate cancer (n = 197) or mCRPCa (n = 109). GRM1 expression in prostatic tissues was examined using immunohistochemistry (IHC). Cell growth, migration, and invasion were determined using cell cytotoxicity and modified Boyden chamber assays, respectively. Apoptosis was detected using immunoblotting against cleaved caspases, PARP, and γ-H2AX. RESULTS Univariate and multivariate analyses showed significantly higher serum glutamate levels in Gleason score ≥ 8 than in the Gleason score ≤ 7 and in African Americans than in the Caucasian Americans. African Americans with mCRPCa had significantly higher serum glutamate levels than those with primary prostate cancer or benign prostate. However, in Caucasian Americans, serum glutamate levels were similar in normal research subjects and patients with mCRPC. IHC showed weak or no expression of GRM1 in luminal acinar epithelial cells of normal or hyperplastic glands but high expression in primary or metastatic prostate cancer tissues. Glutamate deprivation or blockade decreased prostate cancer cells' proliferation, migration, and invasion and led to apoptotic cell death. CONCLUSIONS Glutamate expression is mechanistically associated with and may provide a biomarker of prostate cancer aggressiveness.
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Affiliation(s)
- Shahriar Koochekpour
- Department of Cancer Genetics, Center for Genetics and Pharmacology, Roswell Park Cancer Institute, Buffalo, New York 14263, USA.
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Wu Y, Sun L, Zou W, Xu J, Liu H, Wang W, Yun X, Gu J. Prosaposin, a regulator of estrogen receptor alpha, promotes breast cancer growth. Cancer Sci 2012; 103:1820-5. [PMID: 22738294 DOI: 10.1111/j.1349-7006.2012.02374.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 06/19/2012] [Accepted: 06/25/2012] [Indexed: 11/28/2022] Open
Abstract
Prosaposin, a secreted protein, is a well-known pleiotropic growth factor. Although a previous report has indicated that prosaposin is overexpressed in breast cancer cell lines, the role of prosaposin in the development of breast cancer remains to be identified. Here, we first revealed that prosaposin upregulated estrogen receptor alpha expression, nuclear translocation and transcriptional activity by western blot, immunofluorescence assay and dual luciferase reporter gene assay, respectively. Furthermore, we demonstrated prosaposin upregulated estrogen receptor alpha expression through MAPK-signaling pathway using MAPK inhibitor. Proliferation assay and tumor xenograft experiments in nude mice (n = 6 per group) further confirmed prosaposin could promote breast cancer growth significantly in vitro and in vivo. These findings suggested that prosaposin might enhance estrogen receptor alpha-mediated signaling axis and play a role in breast cancer development and progression.
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Affiliation(s)
- Yihong Wu
- Department of Biochemistry and Molecular Biology, Shanghai Medical College of Fudan University, China
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23
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Boswell CA, Mundo EE, Zhang C, Stainton SL, Yu SF, Lacap JA, Mao W, Kozak KR, Fourie A, Polakis P, Khawli LA, Lin K. Differential effects of predosing on tumor and tissue uptake of an 111In-labeled anti-TENB2 antibody-drug conjugate. J Nucl Med 2012; 53:1454-61. [PMID: 22872740 DOI: 10.2967/jnumed.112.103168] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
UNLABELLED TENB2, also known as tomoregulin or transmembrane protein with epidermal growth factor-like and 2 follistatin-like domains, is a transmembrane proteoglycan overexpressed in human prostate tumors. This protein is a promising target for antimitotic monomethyl auristatin E (MMAE)-based antibody-drug conjugate (ADC) therapy. Nonlinear pharmacokinetics in normal mice suggested that antigen expression in normal tissues may contribute to targeted mediated disposition. We evaluated a predosing strategy with unconjugated antibody to block ADC uptake in target-expressing tissues in a mouse model while striving to preserve tumor uptake and efficacy. METHODS Unconjugated, unlabeled antibody was preadministered to mice bearing the TENB2-expressing human prostate explant model, LuCaP 77, followed by a single administration of (111)In-labeled anti-TENB2-MMAE for biodistribution and SPECT/CT studies. A tumor-growth-inhibition study was conducted to determine the pharmacodynamic consequences of predosing. RESULTS Preadministration of anti-TENB2 at 1 mg/kg significantly increased blood exposure of the radiolabeled ADC and reduced intestinal, hepatic, and splenic uptake while not affecting tumor accretion. Similar tumor-to-heart ratios were measured by SPECT/CT at 24 h with and without the predose. Consistent with this, the preadministration of 0.75 mg/kg did not interfere with efficacy in a tumor-growth study dosed at 0.75 mg or 2.5 mg of ADC per kilogram. CONCLUSION Overall, the potential to mask peripheral, nontumor antigen uptake while preserving tumor uptake and efficacy could ameliorate toxicity and may significantly affect future dosing strategies for ADCs.
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Affiliation(s)
- C Andrew Boswell
- Genentech Research and Early Development, South San Francisco, California 94080, USA
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24
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Koochekpour S, Hu S, Vellasco-Gonzalez C, Bernardo R, Azabdaftari G, Zhu G, Zhau HE, Chung LWK, Vessella RL. Serum prosaposin levels are increased in patients with advanced prostate cancer. Prostate 2012; 72:253-69. [PMID: 21630292 PMCID: PMC3406735 DOI: 10.1002/pros.21427] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Accepted: 05/04/2011] [Indexed: 11/08/2022]
Abstract
BACKGROUND We previously cloned prosaposin (PSAP) from metastatic castrate-resistant prostate cancer (mCRPCa) cells and demonstrated its genomic amplification and/or overexpression in metastatic PCa cell lines, xenografts, and lymph node metastases. The clinicohistopathological significance of serum PSAP levels and its tissue expression and association with predictive or prognostic variable in primary or advanced PCa are not known. METHODS We examined PSAP expression by immunohistochemical staining during early embryogenic development of the prostate and within a large tissue microarray which included 266 benign and malignant prostate tissues. In addition, serum PSAP levels in the age-adjusted normal male population and in 154 normal individuals and patients with primary or mCRPCa were measured by an ELISA assay. RESULTS Univariate and multivariate analyses revealed a significant and inverse association between PSAP expression and clinical stages II and III tumors, dominant Gleason patterns 3 and 4, and seminal vesicle invasion. In the normal male population, the lowest serum PSAP level was detected before puberty, peaked at the most reproductive age group (20- to 39-year old), and then, decreased to a range between the two groups for men above 40-year old. Regardless of age and when compared with normal individuals, serum PSAP levels significantly decreased in primary organ-confined PCa, but increased in those with mCRPCa. CONCLUSION Our results show that PSAP has the potential to differentiate between primary and advanced PCa. Additional large-scale studies are needed to define the usefulness of tissue expression or serum PSAP levels as a diagnostic or prognostic marker or as a therapeutic target in PCa.
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Affiliation(s)
- Shahriar Koochekpour
- Department of Urology, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA.
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Pawar H, Kashyap MK, Sahasrabuddhe NA, Renuse S, Harsha HC, Kumar P, Sharma J, Kandasamy K, Marimuthu A, Nair B, Rajagopalan S, Maharudraiah J, Premalatha CS, Kumar KVV, Vijayakumar M, Chaerkady R, Prasad TSK, Kumar RV, Pandey A. Quantitative tissue proteomics of esophageal squamous cell carcinoma for novel biomarker discovery. Cancer Biol Ther 2011; 12:510-22. [PMID: 21743296 PMCID: PMC3218592 DOI: 10.4161/cbt.12.6.16833] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) is among the top ten most frequent malignancies worldwide. In this study, our objective was to identify potential biomarkers for ESCC through a quantitative proteomic approach using the isobaric tags for relative and absolute quantitation (iTRAQ) approach. We compared the protein expression profiles of ESCC tumor tissues with the corresponding adjacent normal tissue from ten patients. LC-MS/MS analysis of strong cation exchange chromatography fractions was carried out on an Accurate Mass QTOF mass spectrometer, which led to the identification of 687 proteins. In all, 257 proteins were identified as differentially expressed in ESCC as compared to normal. We found several previously known protein biomarkers to be upregulated in ESCC including thrombospondin 1 (THBS1), periostin 1 (POSTN) and heat shock 70 kDa protein 9 (HSPA9) confirming the validity of our approach. In addition, several novel proteins that had not been reported previously were identified in our screen. These novel biomarker candidates included prosaposin (PSAP), plectin 1 (PLEC1) and protein disulfide isomerase A 4 (PDIA4) that were further validated to be overexpressed by immunohistochemical labeling using tissue microarrays. The success of our study shows that this mass spectrometric strategy can be applied to cancers in general to develop a panel of candidate biomarkers, which can then be validated by other techniques.
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Affiliation(s)
- Harsh Pawar
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Rajiv Gandhi University of Health Sciences; Bangalore, India
- Department of Pathology; Kidwai Memorial Institute of Oncology; Kidwai Memorial Institute of Oncology; Bangalore, India
| | - Manoj Kumar Kashyap
- Institute of Bioinformatics; International Technology Park; Bangalore, India
| | - Nandini A Sahasrabuddhe
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Manipal University; Manipal, India
- McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Department of Biological Chemistry; Johns Hopkins University School of Medicine; Baltimore, MD USA
| | - Santosh Renuse
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Department of Biotechnology; Amrita Vishwa Vidyapeetham; Kollam, India
- McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Department of Biological Chemistry; Johns Hopkins University School of Medicine; Baltimore, MD USA
| | - HC Harsha
- Institute of Bioinformatics; International Technology Park; Bangalore, India
| | - Praveen Kumar
- Institute of Bioinformatics; International Technology Park; Bangalore, India
| | - Jyoti Sharma
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Manipal University; Manipal, India
| | - Kumaran Kandasamy
- Institute of Bioinformatics; International Technology Park; Bangalore, India
| | - Arivusudar Marimuthu
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Manipal University; Manipal, India
| | - Bipin Nair
- Department of Biotechnology; Amrita Vishwa Vidyapeetham; Kollam, India
| | | | - Jagadeesha Maharudraiah
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- RajaRajeswari Medical College; Bangalore, India
| | | | | | - M Vijayakumar
- Department of Surgical Oncology; Kidwai Memorial Institute of Oncology; Bangalore, India
| | - Raghothama Chaerkady
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Department of Biological Chemistry; Johns Hopkins University School of Medicine; Baltimore, MD USA
| | - Thotterthodi Subrahmanya Keshava Prasad
- Institute of Bioinformatics; International Technology Park; Bangalore, India
- Manipal University; Manipal, India
- Centre of Excellence in Bioinformatics; School of Life Sciences; Pondicherry University; Pondicherry, India
| | - Rekha V Kumar
- Department of Pathology; Kidwai Memorial Institute of Oncology; Kidwai Memorial Institute of Oncology; Bangalore, India
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Department of Biological Chemistry; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Oncology; Johns Hopkins University School of Medicine; Baltimore, MD USA
- Pathology; Johns Hopkins University School of Medicine; Baltimore, MD USA
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Mao X, Young BD, Lu YJ. The application of single nucleotide polymorphism microarrays in cancer research. Curr Genomics 2011; 8:219-28. [PMID: 18645599 DOI: 10.2174/138920207781386924] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2006] [Revised: 01/22/2007] [Accepted: 03/02/2007] [Indexed: 01/21/2023] Open
Abstract
The development of microarray technology has had a significant impact on the genetic analysis of human disease. The recently developed single nucleotide polymorphism (SNP) array can be used to measure both DNA polymorphism and dosage changes. Our laboratory has applied SNP microarray analysis to uncover frequent uniparental disomies and sub-microscopic genomic copy number gains and losses in different cancers. This review will focus on the wide range of applications of SNP microarray analysis to cancer research. SNP array genotyping can determine loss of heterozygosity, genomic copy number changes and DNA methylation alterations of cancer cells. The same technology can also be used to investigate allelic association in cancers. Therefore, it can be applied to the identification of cancer predisposition genes, oncogenes and tumor suppressor genes in specific types of tumors. As a consequence, they have potential in cancer risk assessment, diagnosis, prognosis and treatment selection.
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Affiliation(s)
- Xueying Mao
- Medical Oncology Centre, Cancer Institute, Barts and London School of Medicine and Dentistry, Queen Mary, University of London, Charterhouse Square, London, UK
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Zhang J, Wang L, Anderson LB, Witthuhn B, Xu Y, Lü J. Proteomic profiling of potential molecular targets of methyl-selenium compounds in the transgenic adenocarcinoma of mouse prostate model. Cancer Prev Res (Phila) 2010; 3:994-1006. [PMID: 20647336 DOI: 10.1158/1940-6207.capr-09-0261] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Because the Selenium (Se) and Vitamin E Cancer Prevention Trial (SELECT) failed to show the efficacy of selenomethionine for prostate cancer prevention, there is a critical need to identify safe and efficacious Se forms for future trials. We have recently shown significant preventive benefit of methylseleninic acid (MSeA) and Se-methylselenocysteine (MSeC) in the transgenic adenocarcinoma mouse prostate (TRAMP) model by oral administration. The present work applied iTRAQ proteomic approach to profile protein changes of the TRAMP prostate and to characterize their modulation by MSeA and MSeC to identify their potential molecular targets. Dorsolateral prostates from wild-type mice at 18 weeks of age and TRAMP mice treated with water (control), MSeA, or MSeC (3 mg Se/kg) from 8 to 18 weeks of age were pooled (9-10 mice per group) and subjected to protein extraction, followed by protein denaturation, reduction, and alkylation. After tryptic digestion, the peptides were labeled with iTRAQ reagents, mixed together, and analyzed by two-dimensional liquid chromatography/tandem mass spectrometry. Of 342 proteins identified with >95% confidence, the expression of 75 proteins was significantly different between TRAMP and wild-type mice. MSeA mainly affected proteins related to prostate functional differentiation, androgen receptor signaling, protein (mis)folding, and endoplasmic reticulum-stress responses, whereas MSeC affected proteins involved in phase II detoxification or cytoprotection, and in stromal cells. Although MSeA and MSeC are presumed precursors of methylselenol and were equally effective against the TRAMP model, their distinct affected protein profiles suggest biological differences in their molecular targets outweigh similarities.
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Affiliation(s)
- Jinhui Zhang
- The Hormel Institute, University of Minnesota, Austin, 55912, USA
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Hu S, Delorme N, Liu Z, Liu T, Velasco-Gonzalez C, Garai J, Pullikuth A, Koochekpour S. Prosaposin down-modulation decreases metastatic prostate cancer cell adhesion, migration, and invasion. Mol Cancer 2010; 9:30. [PMID: 20132547 PMCID: PMC2825248 DOI: 10.1186/1476-4598-9-30] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 02/04/2010] [Indexed: 01/24/2023] Open
Abstract
Background Factors responsible for invasive and metastatic progression of prostate cancer (PCa) remain largely unknown. Previously, we reported cloning of prosaposin (PSAP) and its genomic amplification and/or overexpression in several androgen-independent metastatic PCa cell lines and lymph node metastases. PSAP is the lysosomal precursor of saposins, which serve as activators for lysosomal hydrolases involved in the degradation of ceramide (Cer) and other sphingolipids. Results Our current data show that, in metastatic PCa cells, stable down-modulation of PSAP by RNA-interference via a lysosomal proteolysis-dependent pathway decreased β1A-integrin expression, its cell-surface clustering, and adhesion to basement membrane proteins; led to disassembly of focal adhesion complex; and decreased phosphorylative activity of focal adhesion kinase and its downstream adaptor molecule, paxillin. Cathepsin D (CathD) expression and proteolytic activity, migration, and invasion were also significantly decreased in PSAP knock-down cells. Transient-transfection studies with β1A integrin- or CathD-siRNA oligos confirmed the cause and effect relationship between PSAP and CathD or PSAP and Cer-β1A integrin, regulating PCa cell migration and invasion. Conclusion Our findings suggest that by a coordinated regulation of Cer levels, CathD and β1A-integrin expression, and attenuation of "inside-out" integrin-signaling pathway, PSAP is involved in PCa invasion and therefore might be used as a molecular target for PCa therapy.
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Affiliation(s)
- Siyi Hu
- Stanley S Scott Cancer Center, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
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29
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Correction for Kang et al., Prosaposin inhibits tumor metastasis via paracrine and endocrine stimulation of stromal p53 and Tsp-1. Proc Natl Acad Sci U S A 2009. [DOI: 10.1073/pnas.0908950106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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30
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Tan LB, Chen KT, Yuan YC, Liao PC, Guo HR. Identification of urine PLK2 as a marker of bladder tumors by proteomic analysis. World J Urol 2009; 28:117-22. [DOI: 10.1007/s00345-009-0432-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2008] [Accepted: 05/20/2009] [Indexed: 11/29/2022] Open
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Boyd LK, Mao X, Lu YJ. Use of SNPs in cancer predisposition analysis, diagnosis and prognosis: tools and prospects. ACTA ACUST UNITED AC 2009; 3:313-26. [PMID: 23488466 DOI: 10.1517/17530050902828325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND The development of cancer is accompanied by several genetic alterations. Single nucleotide polymorphisms (SNPs) are the most common form of genetic variation found in the human population. SNP arrays offer a high-resolution, high-throughput technology for genome-wide analysis, allowing the simultaneous detection of genotype and copy number changes. The power of SNP arrays as a research tool has accelerated our understanding of the genetic alterations in cancer, providing potential clinical applications. OBJECTIVE This manuscript reviews the use of SNPs in cancer research and discusses the potential clinical application of analysing SNPs for cancer predisposition analysis, diagnosis and prognosis. We also discuss potential future applications for the analysis of SNPs. METHODS In writing this review, we have reflected on our own extensive experience in the field of cancer genomics and have surveyed peer-reviewed articles focussing on the application of SNPs in cancer research. In addition, we have referred to product websites. CONCLUSION Since its development, SNP array technology has been extensively applied in cancer research. Information generated from SNP array analysis has been providing valuable information. With the full understanding of the rich resources of SNPs and their effects on influencing cellular function, SNP arrays will revolutionise the clinical practice in cancer risk assessment, diagnosis and prognosis making the concept of personalised medicine a reality.
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Affiliation(s)
- Lara K Boyd
- Queen Mary University of London, Barts and the London School of Medicine and Dentistry, Institute of Cancer, Centre for Molecular Oncology and Imaging, John Vane Science Centre, Charterhouse Square, London EC1M 6BQ, UK +44 20 7882 6140 ; +44 20 7014 0431 ;
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Genomic aberrations in squamous cell lung carcinoma related to lymph node or distant metastasis. Lung Cancer 2009; 66:372-8. [PMID: 19324446 DOI: 10.1016/j.lungcan.2009.02.017] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 02/12/2009] [Accepted: 02/15/2009] [Indexed: 11/22/2022]
Abstract
About 50% of patients presenting with resectable lung cancer develop distant metastases within 5 years. Genomic markers predicting metastatic behaviour of squamous cell lung carcinoma (SCC) are currently underexposed. We analyzed a cohort of patients with primary SCC using array-based comparative genomic hybridization (aCGH) to identify which genomic aberrations are related to metastatic behaviour. The cohort consisted of 34 patients with a follow-up of at least 5 years, 8 with metastases in regional lymph nodes only and 26 patients without any metastases at the time of surgery. Eleven of the latter 26 developed metastases in distant organs within 3 years after surgery. Copy number changes observed in at least 40% of all SCC included gains at chromosomal arms 3q, 5p, 8q, 19q, 20p, 22q and losses at 3p, 4p, 4q, 5q, 8p and 9p. High copy number amplifications were observed at 2p15-p16, 3q24-q29, 8p11-p12, 8q23-q24, and 12p12, containing candidate oncogenes such as BCL11A, REL, ECT2, PIK3CA, ADAM9, MYC and KRAS. Amplification of 2p15-p16 is a novel finding in SCC. Another novel finding is the homozygous deletion observed at 4q33-34.1 in 15% of the SCC cases. Gains at 7q36, 8p12, 10q22, 12p12, loss at 4p14 and the homozygous deletions at 4q occurred significantly more frequent in SCC from patients with lymph node metastases only. SCC from patients with distant metastases showed a significantly higher gain frequency at 8q22-q24 and loss at 8p23 and 13q21, and a significantly lower gain frequency at 2p12 and 2p16 and loss at 11q25 compared with SCC from patients without metastases. Of these, gains at 7q, 8p and 10q were restricted to SCC with lymph node metastasis and gain at 8q was restricted to patients with distant metastasis. Two genomic aberrations, i.e. loss of 4p and gain of 19q12 were observed more frequently in SCC with only lymph node metastases as compared to SCC with distant metastases. In conclusion, we identified genomic aberrations in primary SCC that were related to lymph node or distant metastases.
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Yoneshige A, Suzuki K, Kojima N, Matsuda J. Regional expression of prosaposin in the wild-type and saposin D-deficient mouse brain detected by an anti-mouse prosaposin-specific antibody. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2009; 85:422-434. [PMID: 19907127 PMCID: PMC3621563 DOI: 10.2183/pjab.85.422] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Accepted: 10/05/2009] [Indexed: 05/28/2023]
Abstract
Prosaposin is a precursor of saposins A, B, C, and D. Saposins are indispensable for lysosomal hydrolysis of sphingolipids. The notion that prosaposin itself is likely involved in brain development led us to generate an anti-mouse prosaposin-specific antibody that do not cross-react with any of the processed saposins. We have used it to study expression of prosaposin in the brain of wild-type (WT) and saposin D knockout mice (Sap-D(-/-)). Immunoblot studies indicated that prosaposin, already abundant in the brain of WT, was dramatically increased in Sap-D(-/-). By immunohistochemistry, the brain of WT was rich in prosaposin in hippocampal CA3 pyramidal neurons, tufted cells and mitral cells in olfactory bulb, and cerebellar Purkinje cells. In Sap-D(-/-), immunoreactivity of prosaposin was increased in these neurons, most notably in the CA3 pyramidal neurons which contained prosaposin immuno-positive inclusion bodies in the endoplasmic reticulum. Further characterization of these prosaposin-rich neurons may provide new insights into the physiological functions of prosaposin in the nervous system.
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Affiliation(s)
- Azusa Yoneshige
- Institute of Glycoscience, Tokai University, Kanagawa,
Japan
| | - Kunihiko Suzuki
- Institute of Glycoscience, Tokai University, Kanagawa,
Japan
| | - Naoya Kojima
- Institute of Glycoscience, Tokai University, Kanagawa,
Japan
| | - Junko Matsuda
- Institute of Glycoscience, Tokai University, Kanagawa,
Japan
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Koochekpour S, Lee TJ, Sun Y, Hu S, Grabowski GA, Liu Z, Garay J. Prosaposin is an AR-target gene and its neurotrophic domain upregulates AR expression and activity in prostate stromal cells. J Cell Biochem 2008; 104:2272-85. [PMID: 18481277 DOI: 10.1002/jcb.21786] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recent studies have introduced prosaposin (PSAP) as a pleiotrophic growth factor for prostate cancer (PCa). We have previously reported that PSAP or one of its known active molecular derivatives, saposin C functions as an androgen-agonist and androgen-regulated gene (ARG) for androgen-sensitive (AS) PCa cell lines. Due to the potential significance of androgen receptor (AR)-expressing stroma in PCa, we evaluated a possible bi-directional paracrine regulatory interactions between DHT and PSAP in AR-positive prostate stromal (PrSt) cells. We report that saposin C in a ligand-independent manner increased AR expression, its nuclear content, and tyrosine phosphorylation. DHT treatment of PrSt cells increased PSAP expression. We also demonstrated both serum- and androgen-inducibility of a previously characterized hormone-responsive element (HRE) located in the proximal region of PSAP promoter. In addition, conditioned-media derived from PrSt cells and bone fibroblasts (i.e., MSF) differentially increased PSAP-promoter activity in androgen-independent (AI) PC-3 and AS LNCaP cells. Our data for the first time demonstrate that not only saposin C or PSAP regulates AR expression/activity, but also function as an ARG in PrSt. Ligand-independent activation of AR by PSAP or saposin C in PCa and stromal cells may contribute not only to prostate carcinogenesis at an early stage, but also in AI progression of the disease in an androgen-deprived tumor microenvironment.
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Affiliation(s)
- S Koochekpour
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112, USA.
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Morozova O, Marra MA. From cytogenetics to next-generation sequencing technologies: advances in the detection of genome rearrangements in tumorsThis paper is one of a selection of papers published in this Special Issue, entitled CSBMCB — Systems and Chemical Biology, and has undergone the Journal's usual peer review process. Biochem Cell Biol 2008; 86:81-91. [PMID: 18443621 DOI: 10.1139/o08-003] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Genome rearrangements have long been recognized as hallmarks of human tumors and have been used to diagnose cancer. Techniques used to detect genome rearrangements have evolved from microscopic examinations of chromosomes to the more recent microarray-based approaches. The availability of next-generation sequencing technologies may provide a means for scrutinizing entire cancer genomes and transcriptomes at unparalleled resolution. Here we review the methods that have been used to detect genome rearrangements and discuss the scope and limitations of each approach. We end with a discussion of the potential that next-generation sequencing technologies may offer to the field.
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Affiliation(s)
- Olena Morozova
- BC Cancer Agency Genome Sciences Centre, Suite 100-570 West 7th Avenue, Vancouver, BC V5Z 4S6, Canada
| | - Marco A. Marra
- BC Cancer Agency Genome Sciences Centre, Suite 100-570 West 7th Avenue, Vancouver, BC V5Z 4S6, Canada
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Li R, Guo Y, Han BM, Yan X, Utleg AG, Li W, Tu LC, Wang J, Hood L, Xia S, Lin B. Proteomics cataloging analysis of human expressed prostatic secretions reveals rich source of biomarker candidates. Proteomics Clin Appl 2008; 2:543-555. [PMID: 20559448 DOI: 10.1002/prca.200780159] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Expressed prostatic secretions (EPS) contain proteins of prostate origin that may reflect the health status of the prostate and be used as diagnostic markers for prostate diseases including prostatitis, benign prostatic hyperplasia, and prostate cancer. Despite their importance and potential applications, a complete catalog of EPS proteins is not yet available. We, therefore, undertook a comprehensive analysis of the EPS proteome using 2-D micro-LC combined with MS/MS. Using stringent filtering criteria, we identified a list of 114 proteins with at least two unique-peptide hits and an additional 75 proteins with only a single unique-peptide hit. The proteins identified include kallikrein 2 (KLK2), KLK3 (prostate-specific antigen), KLK11, and nine cluster of differentiation (CD) molecules including CD10, CD13, CD14, CD26, CD66a, CD66c, CD 143, CD177, and CD224. To our knowledge, this list represents the first comprehensive characterization of the EPS proteome, and it provides a candidate biomarker list for targeted quantitative proteomics analysis using a multiple reaction monitoring (MRM) approach. To help prioritize candidate biomarkers, we constructed a protein-protein interaction network of the EPS proteins using Cytoscape (www.cytoscape.org), and overlaid the expression level changes from the Oncomine database onto the network.
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Affiliation(s)
- Runsheng Li
- Shanghai Institute of Planned Parenthood Research, Shanghai, China
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Ding Y, Yuan HQ, Kong F, Hu XY, Ren K, Cai J, Wang XL, Young CYF. Ectopic expression of neurotrophic peptide derived from saposin C increases proliferation and upregulates androgen receptor expression and transcriptional activity in human prostate cancer cells. Asian J Androl 2007; 9:601-9. [PMID: 17712477 DOI: 10.1111/j.1745-7262.2007.00328.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
AIM To determine the effects of the functional domain of saposin C (neurotrophic peptide [NP]) on androgen receptor (AR) expression and transcriptional activity. METHODS We constructed DNA vectors expressing NP or a chimeric peptide of the viral TAT transduction domain and NP (TAT-NP) using gene cloning technology. The effects of ectopic expression of NP or TAT-NP on cell growth were examined by 3-(4, 5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. Reverse transcription-polymerase chain reaction (RT-PCR), Western blot, transient transfection and reporter gene assays were used to determine the effects of NP on AR expression and activation. RESULTS NP stimulated proliferation of androgen responsive LNCaP cells in the absence of androgens. RT-PCR and Western blot analyses showed that ectopic expression of NP resulted in induction of AR gene expression, and that the NP-stimulated expression of AR could be synergistically enhanced in the presence of androgens. Furthermore, reporter gene assay results showed that NP could enhance AR transactivation by increasing androgen-inducible gene reporter activity. CONCLUSION We provided evidence that ectopic expression of saposin C-originated NP could upregulate AR gene expression and activate the AR transcriptional function in an androgen-independent manner in prostate cancer cells.
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Affiliation(s)
- Yan Ding
- Department of Biochemistry and Molecular Biology, School of Medicine, Shandong University, Jinan 250012, China.
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Koochekpour S, Lee TJ, Wang R, Sun Y, Delorme N, Hiraiwa M, Grabowski GA, Culig Z, Minokadeh A. Prosaposin is a novel androgen-regulated gene in prostate cancer cell line LNCaP. J Cell Biochem 2007; 101:631-41. [PMID: 17171640 DOI: 10.1002/jcb.21207] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Androgen-regulated genes (ARG) are implicated in normal and neoplastic growth of the prostate. Recently, we reported genomic amplification and/or overexpression of a previously known neurotrophic factor, prosaposin, in androgen-independent (AI) or metastatic prostate cancer (PCa) cells and tissues. Prosaposin and/or its known active molecular derivatives (e.g., saposin C) function as a pluripotent growth factor with diverse biological activities that favor malignant phenotypes in PCa cells. In addition, prosaposin or saposin C upregulates androgen receptor (AR) and AR-target genes (i.e., prostate-specific antigen, Probasin) expression and activity in LNCaP cells. Here, we examined prosaposin as an ARG. We report that DHT treatment of LNCaP cells increases prosaposin expression. In addition, we demonstrate androgen-responsiveness of prosaposin promoter and AR occupancy to a hormone-responsive element located in the proximal region of the prosaposin promoter. Our data for the first time identify prosaposin as an ARG. This observation, together with the pleiotropic growth factor activity of prosaposin, might suggest a role for this molecule in AR-dependent progression of prostate cancer at its early or late AI-state.
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Affiliation(s)
- S Koochekpour
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112, USA.
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Evans-Galea MV, Wielgosz MM, Hanawa H, Srivastava DK, Nienhuis AW. Suppression of clonal dominance in cultured human lymphoid cells by addition of the cHS4 insulator to a lentiviral vector. Mol Ther 2007; 15:801-9. [PMID: 17299406 DOI: 10.1038/sj.mt.6300103] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Lentiviral vectors efficiently transduce quiescent stem cells and are being evaluated for gene therapy of blood dis-orders. The risk of genotoxicity as a result of insertional mutagenesis is an important safety consideration. The hy-persensitive site 4 insulator from the chicken beta-globin locus (cHS4) possesses chromatin bar-rier and enhancer-blocking functions. A control lentiviral vector encoding green fluorescent protein was compared with a vector in which the cHS4 insulator element flanked the green fluorescent protein expression cassette in single cell isolates of transduced human T cells (Jurkat) after 9 days in culture. The insulator had minimal effect on mean fluorescent intensity and only modestly reduced the variability of green fluorescent protein expression among indi-vidual single cell isolates. Most unique integration sites were within genes, but the insulator-containing vector had a moderate predilection to integrate near the transcriptional start site compared with the control vector. Clonal domi-nance developed in cultures of cells containing the integrated vector genomes, as reflected by the recovery of mul-tiple single cell isolates containing the same integration site. We infer that certain integrations conferred a prolifera-tive or survival advantage by affecting gene expression through insertional mutagenesis, leading to this clonal dominance. This effect was diminished by including the insulator element in the vector genome.
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Affiliation(s)
- Marguerite V Evans-Galea
- Department of Experimental Hematology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
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40
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Koochekpour S, Lee TJ, Wang R, Culig Z, Delorme N, Caffey S, Marrero L, Aguirre J. Prosaposin upregulates AR and PSA expression and activity in prostate cancer cells (LNCaP). Prostate 2007; 67:178-89. [PMID: 17044040 DOI: 10.1002/pros.20513] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Prosaposin overexpression and/or genomic amplification have been demonstrated in androgen-independent (AI) prostate cancer cell lines and tissues. Here, we explored the possibility for a functional relationship between prosaposin and androgen receptor (AR) in LNCaP cells. METHODS The effect of prosaposin or its active molecular derivatives (e.g., saposin C) on expression and activity of androgen receptor (AR) and prostate-specific antigen (PSA) was examined by using immunoblotting, RT-PCR, transfection, and reporter gene assays, immunofluorescence staining, and inhibitors of signal transduction pathways. RESULTS Prosaposin or saposin C, in an AI-manner, (a) increased AR mRNA and protein expression and nuclear AR content and its phosphorylation state; (b) increased PSA mRNA and protein expression; and (c) upregulated PSA- and an androgen-inducible probasin (PB)-reporter gene activity in LNCaP and AR-transfected PC-3 cells. Induction of PSA expression and reporter activity was substantially blocked or prevented with the antiandrogen bicalutamide, pertussis toxin, or inhibitors of MAPK- and PI3K/Akt-signaling pathways, indicating an androgen-agonistic effect for saposin C that involves AR and multiple signaling pathways. CONCLUSIONS The results for the first time introduce prosaposin as an androgen-agonist in prostate cancer cells. This finding, together with the growth-promoting effect and overexpression of prosaposin, may support a growth advantage to AI prostate cancer cells.
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Affiliation(s)
- Shahriar Koochekpour
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112, USA.
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Abstract
PURPOSE OF REVIEW Classifying tumors and identifying therapeutic targets requires a description of the genetic changes underlying cancer. Single nucleotide polymorphism (SNP) arrays provide a high-resolution platform for describing several types of genetic changes simultaneously. With the resolution of these arrays increasing exponentially, they are becoming increasingly powerful tools for describing the genetic events underlying cancer. RECENT FINDINGS The ability to map loss of heterozygosity (LOH) and overall copy number variations using SNP arrays is known. Techniques have recently been developed to map LOH at high resolution in the absence of paired normal data. Copy number variations described by SNP array studies are now reaching resolutions enabling the identification of novel oncogenes and tumor suppressor genes. The ability to determine allele-specific copy number changes has only recently been described. Moreover, SNP arrays offer a high-throughput platform for large-scale association studies that are likely to lead to the identification of multiple germline variants that predispose to cancer. SUMMARY SNP arrays are an ideal platform for identifying both somatic and germline genetic variants that lead to cancer. They provide a basis for DNA-based cancer classification and help to define the genes being modulated, improving understanding of cancer genesis and potential therapeutic targets.
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Affiliation(s)
- Amit Dutt
- Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge 02142, USA
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Bloch M, Ousingsawat J, Simon R, Schraml P, Gasser TC, Mihatsch MJ, Kunzelmann K, Bubendorf L. KCNMA1 gene amplification promotes tumor cell proliferation in human prostate cancer. Oncogene 2006; 26:2525-34. [PMID: 17146446 DOI: 10.1038/sj.onc.1210036] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Molecular mechanisms of prostate cancer progression are poorly understood. Here, we studied gene amplification of the large conductance calcium-activated potassium channel alpha subunit (KCNMA1), which is located at the chromosomal region 10q22. Fluorescence in situ hybridization (FISH) revealed KCNMA1 amplification in 16% of 119 late-stage human prostate cancers and in the hormone-insensitive prostate cancer cell line PC-3. In contrast, KCNMA1 amplification was absent in 33 benign controls, 32 precursor lesions and in 105 clinically organ-confined prostate cancers. Amplification was associated with mRNA and protein overexpression as well as increased density of BK channel protein and beta-estradiol-insensitive BK currents in PC-3 cells as compared to non-amplified control cell lines. Specific blockade of BK channels by iberiotoxin or RNA(i) significantly inhibited K(+) currents and growth of PC-3 cells. The data demonstrate that 10q22 amplification drives KCNMA1 expression and cell proliferation. Thus, KCNMA1 qualifies as a promising diagnostic and therapeutic target in patients with prostate cancer.
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Affiliation(s)
- M Bloch
- Institute for Pathology, University Hospital Basel, Basel, Switzerland
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Marques RB, van Weerden WM, Erkens-Schulze S, de Ridder CM, Bangma CH, Trapman J, Jenster G. The Human PC346 Xenograft and Cell Line Panel: A Model System for Prostate Cancer Progression. Eur Urol 2006; 49:245-57. [PMID: 16413664 DOI: 10.1016/j.eururo.2005.12.035] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2005] [Accepted: 12/19/2005] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Prostate cancer (PC) model systems that reflect the different disease stages are essential for studying the development and progression of PC and for testing new treatment modalities. This review summarizes the establishment and characterization of the PC346 progression model and compares it to other available human PC cell lines and xenografts. METHODS The PC346 model was derived from the transurethral resection of a primary prostate tumor. Tumor samples were subcutaneously implanted into athymic mice, which resulted in the development of a series of xenografts from which in vitro cell cultures were established. RESULTS The PC346 panel includes sublines with hormone-response characteristics that range from androgen-sensitive to androgen-independent (AI) growth. In vivo and in vitro selection of androgen-sensitive lines under androgen-depleted conditions replicated the clinically relevant relapse phenomenon, and resulted in a series of modifications in the androgen-receptor (AR) pathway: AR mutation, overexpression, and downregulation. CONCLUSIONS The PC346 panel reproduces many biological characteristics of the different phases of clinical PC and the most common AR modifications observed in hormone-refractory tumors, being a valuable addition to the limited collection of available model systems.
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Affiliation(s)
- Rute B Marques
- Department of Urology, Josephine Nefkens Institute, Erasmus Medical Center, P.O. Box 1738, 3000 DR, Rotterdam, The Netherlands
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