1
|
Lo Nigro C, Monteverde M, Lee S, Lattanzio L, Vivenza D, Comino A, Syed N, McHugh A, Wang H, Proby C, Garrone O, Merlano M, Hatzimichael E, Briasoulis E, Gojis O, Palmieri C, Jordan L, Quinlan P, Thompson A, Crook T. NT5E CpG island methylation is a favourable breast cancer biomarker. Br J Cancer 2012; 107:75-83. [PMID: 22653144 PMCID: PMC3389412 DOI: 10.1038/bjc.2012.212] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Relapse risk assessment and individual treatment recommendations remain suboptimal for breast cancer patients. In the light of existing preclinical and clinical data, we studied NT5E (5'-nucleotidase, ecto) expression and NT5E CpG island methylation in breast cancer. METHODS We used RT-PCR, qPCR, methylation-specific PCR and pyrosequencing to analyse NT5E in breast carcinoma cell lines and primary and breast carcinomas. RESULTS NT5E CpG island methylation was inversely associated with NT5E expression in breast carcinoma cell lines. In clinical series, patients whose primary tumours had NT5E CpG island methylation were less likely to develop metastasis (P=0.003, OR=0.34, 95% CI: 0.17-0.69). In 3/4 paired samples, NT5E was methylated in primary tumours and demethylated in CNS metastases. Patients progressing to non-visceral as compared with visceral metastases were more likely to have NT5E CpG island methylation in primary tumours (P=0.01, OR=11.8). Patients with tumours lacking detectable methylation had shorter disease-free survival (DFS) (P=0.001, HR=2.7) and overall survival (OS) (P=0.001, HR=3). The favourable prognostic value of NT5E methylation was confirmed in oestrogen receptor negative (P=0.011, HR=3.27, 95% CI: 1.31-8.12) and in triple negative cases (P=0.004; HR=6.2, 95% CI: 1.9-20). Moreover, we observed a more favourable outcome to adjuvant chemotherapy in patients whose tumours were positive for NT5E CpG island methylation: DFS (P=0.0016, HR=5.1, 95% CI: 1.8-14.37) and OS (P=0.0005, HR=7.4, 95% CI: 2.416-23.08). CONCLUSION NT5E CpG island methylation is a promising breast cancer biomarker.
Collapse
Affiliation(s)
- C Lo Nigro
- Laboratory of Cancer Genetics and Translational Oncology, Oncology Department, S. Croce General Hospital, Cuneo, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
2
|
|
3
|
Bogan KL, Brenner C. 5′-Nucleotidases and their new roles in NAD+ and phosphate metabolism. NEW J CHEM 2010. [DOI: 10.1039/b9nj00758j] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
4
|
Galmarini CM, Jordheim L, Dumontet C. Role of IMP-selective 5'-nucleotidase (cN-II) in hematological malignancies. Leuk Lymphoma 2003; 44:1105-11. [PMID: 12916861 DOI: 10.1080/1042819031000077142] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cytotoxic nucleoside analogs (NA) are important in the treatment of hematologic malignancies. The NA in routine clinical use include the pyrimidine analog cytosine arabinoside (ara-c), which is extensively used in the treatment of acute leukemias, and the purine analogs, cladribine and fludarabine. These drugs have mostly been used in the treatment of low grade hematological malignancies. NA become therapeutically effective only after phosporylation to the triphosphate level. The 5'-nucleotidases (5'-NTs) dephosphorylate the monophosphate form of NA and, therefore, may affect the pharmacological activity of these antimetabolites in the clinic. Several 5'-NTs attached to membranes or present in the cytosol or in mitochondria are present in mammalian cells. cN-II, an IMP-selective 5'-NT, participates in the regulation of purine deoxyribonucleotide metabolism. cN-II opposes the action of the salvage enzymes by dephosphorylating purine nucleoside mononphosphates to purine nucleosides. Due to its phosphotransferase activity, cN-II can also phosphorylate inosine and 2',3'-dideoxyribonucleosides utilizing IMP as a phosphate donor. The observation that cytosolic cN-II is able to phosphorylate purine nucleosides has initiated studies on its potential participation in the metabolism of anticancer agents and in the development of cN-II inhibitory substances. In this review, we highlight the current knowledge concerning cN-II activity and regulation of intracellular deoxyribonucleotide pools and it role in hematological malignancies.
Collapse
|
5
|
Rosi F, Carlucci F, Marinello E, Tabucchi A. Ecto-5'-nucleotidase in B-cell chronic lymphocytic leukemia. Biomed Pharmacother 2002; 56:100-4. [PMID: 12000134 DOI: 10.1016/s0753-3322(01)00072-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Literature on the behaviour of ecto-5'-nucleotidase in the course of B-cell chronic lymphocytic leukemia is briefly reviewed and aims for further researches are highlighted.
Collapse
Affiliation(s)
- F Rosi
- Institute of Biochemistry and Enzymology, Nuovi Istituti Biologici, University of Siena, Italy
| | | | | | | |
Collapse
|
6
|
Galmarini CM, Graham K, Thomas X, Calvo F, Rousselot P, El Jafaari A, Cros E, Mackey JR, Dumontet C. Expression of high Km 5'-nucleotidase in leukemic blasts is an independent prognostic factor in adults with acute myeloid leukemia. Blood 2001; 98:1922-6. [PMID: 11535530 DOI: 10.1182/blood.v98.6.1922] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cytarabine (ara-C) requires activation into its triphosphorylated form, ara-CTP, to exert cytotoxic activity. Cytoplasmic 5'-nucleotidase (5NT) dephosphorylates ara-CMP, a key intermediate, preventing accumulation of ara-CTP and may reduce cellular sensitivity to the cytotoxic activity of ara-C. To determine whether the level of expression of 5NT is correlated with clinical outcome in patients with acute myeloid leukemia (AML) treated with ara-C, this study analyzed the levels of messenger RNA expression of high Km 5NT by real-time polymerase chain reaction at diagnosis in blast cells of 108 patients with AML. High Km 5NT was expressed at diagnosis in the blast cells of 54% of patients. In univariate analysis, (1) patients whose blast cells contained high levels (values greater than the median value for total population) of high Km 5NT at diagnosis had significantly shorter disease-free survival (DFS) than patients with low levels of high Km 5NT (11 months versus 17.5 months, P =.02) and (2) high levels of high Km 5NT also predicted significantly shorter overall survival (15.7 months versus 39 months, P = .01) in young patients (< or = 57 years; median value for the entire population). In a multivariate analysis taking into account age, karyotype risk, and other factors found to have prognostic significance in univariate analysis, (1) high Km 5NT expression was an independent prognostic factor for DFS and (2) high levels of high Km 5NT also predicted significantly shorter overall survival in young patients. These results demonstrate that the expression of high levels of high Km 5NT in blast cells is correlated with outcome in patients with AML.
Collapse
Affiliation(s)
- C M Galmarini
- Unité INSERM 453-Laboratoire de Cytologie Analytique, Faculté de Médécine Rockefeller, Lyon, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Spychala J, Mitchell BS. Regulation of low Km (ecto-) 5'-nucleotidase gene expression in leukemic cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1995; 370:683-7. [PMID: 7660996 DOI: 10.1007/978-1-4615-2584-4_142] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
MESH Headings
- 5'-Nucleotidase/biosynthesis
- 5'-Nucleotidase/genetics
- 5'-Nucleotidase/metabolism
- Base Sequence
- Cell Line
- Cloning, Molecular
- DNA Primers
- Exons
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Neoplastic
- Genomic Library
- Humans
- Kinetics
- Leukemia, Erythroblastic, Acute
- Leukemia, Promyelocytic, Acute
- Leukemia, T-Cell
- Molecular Sequence Data
- Polymerase Chain Reaction
- Promoter Regions, Genetic
- Restriction Mapping
- Tumor Cells, Cultured
Collapse
Affiliation(s)
- J Spychala
- Department of Pharmacology and Internal Medicine, University of North Carolina at Chapel Hill 27599-7365, USA
| | | |
Collapse
|
8
|
Affiliation(s)
- H Zimmermann
- AK Neurochemie, Zoologisches Institut, J.W. Goethe-Universität, Frankfurt am Main, Federal Republic of Germany
| |
Collapse
|
9
|
Boyle JM, Hey Y, Myers K, Stern PL, Grzeschik FH, Ikehara Y, Misumi Y, Fox M. Regional localization of a trophoblast antigen-related sequence and 16 other sequences to human chromosomes 6q using somatic cell hybrids. Genomics 1992; 12:693-8. [PMID: 1572643 DOI: 10.1016/0888-7543(92)90296-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Using a panel of 13 hybrid cell lines, we have regionally localized 22 markers to the long arm of chromosome 6. Revised or new locations are provided for 17 of the markers, and preliminary assignments to chromosome 6 of 11 loci are confirmed. The location of NT5, previously determined by antigen expression in hybrids, has been confirmed at 6q14-q15 by using a cDNA probe. Other DNA probes include one new anonymous sequence, designated D6S130, that maps to 6q12 and 4 VNTR probes that map to the proterminal band, 6q27. Probe CRI-L1065 also maps to 6q21, CRI-994 maps to 6q21-qter, and CRI-L322 maps to 6q14-15, information that may assist the merging of physical and genetic maps.
Collapse
Affiliation(s)
- J M Boyle
- Department of Cancer Genetics, Paterson Institute for Cancer Research, Christie Hospital and Holt Radium Institute, Manchester, United Kingdom
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Simard J, Bérubé D, Sandberg M, Grzeschik KH, Gagné R, Hansson V, Jahnsen T. Assignment of the gene encoding the catalytic subunit C beta of cAMP-dependent protein kinase to the p36 band on chromosome 1. Hum Genet 1992; 88:653-7. [PMID: 1551670 DOI: 10.1007/bf02265292] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A cDNA for the human catalytic subunit (C beta) of cAMP-dependent protein kinase (PKA) has been cloned from a testis cDNA library. In the present study, we have determined the chromosomal localization of this gene using a cDNA for C beta as a probe. Southern blot analysis of genomic DNA from human/mouse cell hybrids revealed that the presence or absence of a 20-kb XbaI fragment, which hybridized with the C beta probe, was concordant with the presence of human chromosome 1. In situ hybridization to metaphase chromosome confirmed the somatic cell hybrid data and regionally mapped the C beta gene of PKA to the p36 band on chromosome 1.
Collapse
Affiliation(s)
- J Simard
- MRC Group in Molecular Endocrinology, CHUL Research Center and Laval University, Québec, Canada
| | | | | | | | | | | | | |
Collapse
|
11
|
Affiliation(s)
- J Banchereau
- Laboratory for Immunological Research, Schering-Plough, Dardilly, France
| | | |
Collapse
|
12
|
Rinke de Wit TF, Struyk L, Vloemans S, Glazebrook J, Boyle JM, Stern PL, van den Elsen PJ. HLA class I homologous transcripts in the human embryonal carcinoma cell line Tera-2. Immunogenetics 1990; 32:187-94. [PMID: 1699886 DOI: 10.1007/bf02114972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We have used the human teratocarcinoma-derived embryonal carcinoma cell line Tera-2 cl. 13 to explore the putative expression of novel HLA class I(-like) genes. Serological analyses revealed that Tera-2 cells do not express polymorphic HLA class I (-A, -B, -C) specificities, but do express HLA class I-like antigens. These phenotypic properties parallel those of certain mouse embryonal carcinoma cells. To study the expression of HLA class I(-like) genes in the Tera-2 cells two different approaches were used. Screening of a Tera-2 cDNA library with a full-length HLA class I cDNA probe under conditions that would allow for the identification of relatively distinct HLA class I-like sequences yielded 27 positive clones, all of which were of the regular HLA-A, -B, -C type. Reverse northern hybridizations of the restriction enzyme-digested Tlab region comprising cosmids with Tera-2 cDNA as the probe resulted in the identification of several putative human genes whose equivalents map within the mouse Tla region. However, none of these genes appeared to be structurally related to HLA class I. A putative H3.3 histone gene was identified in the proximal Tla region of the C57BL/10 mouse. It is concluded that no structural homologues of mouse Qa/Tla genes are expressed in the human developmental cell line Tera-2.
Collapse
Affiliation(s)
- T F Rinke de Wit
- Department of Immunohaematology and Bloodbank, Leiden University Hospital, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
13
|
Boyle JM, Grzeschik KH, Heath PR, Morten JE, Stern PL. Trophoblast glycoprotein recognised by monoclonal antibody 5T4 maps to human chromosome 6q14-q15. Hum Genet 1990; 84:455-8. [PMID: 2323778 DOI: 10.1007/bf00195819] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Human X rodent hybrids were stained by indirect immunofluorescence with 5T4, a murine monoclonal antibody that recognises a 72 kdalton glycoprotein expressed by human trophoblasts and a very restricted range of adult tissues; they were analysed by flow cytometry. Concordance analysis supported by segregation data allowed assignment of the gene controlling glycoprotein expression (M6P1) to chromosome 6. Similar analysis with translocation hybrids gave a regional assignment to 6q14-q15. M6P1 is distinct from NT5, coding for 5' nucleotidase, which maps to the same region.
Collapse
Affiliation(s)
- J M Boyle
- Department of Biochemical Genetics, Paterson Institute of Cancer Research, Christie Hospital and Holt Radium Institute, Manchester, UK
| | | | | | | | | |
Collapse
|
14
|
Boyle JM, Hey Y, Fox M. Nucleotide ectoenzyme activities of human and Chinese hamster fibroblasts in tissue culture. Biochem Genet 1989; 27:655-71. [PMID: 2560629 DOI: 10.1007/bf02396058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We have previously assigned human ecto-5'-nucleotidase (NT) to chromosome 6 on the basis of conversion of exogenously supplied [14C]AMP to adenosine by whole cells of human and Chinese hamster hybrids carrying chromosome 6. In this paper we demonstrate that the activity on human MRC-5 fibroblasts is typical of previously described and purified ecto-5'-nucleotidases. In contrast to MRC-5 cells, Chinese hamster V79A2 cells weakly express an AMPase activity that is not NT. The cytosolic form of NT in human and hybrid fibroblasts is similar to the ectoenzyme in substrate specificity. Hybrids that lack chromosome 6 express neither the ecto- nor the cytosolic enzyme, suggesting that both forms may be coded by the same gene on chromosome 6. Ecto-ATPase, ecto-ADPase, and ecto-ADP kinase activities are each expressed at similar levels in MRC-5 and V79A2. The ATPase, ADPase and NT activities of MRC-5 cells act sequentially to generate adenosine. A similar cascade acts on V79A2 cells but the lack of NT causes the accumulation of AMP.
Collapse
Affiliation(s)
- J M Boyle
- Department of Biochemical Genetics, Christie Hospital, Manchester, U.K
| | | | | |
Collapse
|
15
|
Boyle JM, Hey Y, Grzeschik KH, Thompson L, Munro E, Fox M. Regional localization of human ecto-5' nucleotidase to chromosome 6q14-q21. Hum Genet 1989; 83:179-80. [PMID: 2550355 DOI: 10.1007/bf00286714] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Human and mouse hybrids that contain fragments of human chromosome 6 as translocations were analysed for expression of ecto-5' nucleotidase enzymic activity measured by the conversion of AMP to adenosine and for antigenicity recognized by a monoclonal antibody specific for the human isozyme. Both methods allow a regional assignment of ecto-5'nucleotidase to 6q14-q21.
Collapse
Affiliation(s)
- J M Boyle
- Paterson Institute for Cancer Research, Christie Hospital and Holt Radium Institute, Manchester, UK
| | | | | | | | | | | |
Collapse
|