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Cabaud O, Berger L, Crompot E, Adélaide J, Finetti P, Garnier S, Guille A, Carbuccia N, Farina A, Agavnian E, Chaffanet M, Gonçalves A, Charafe-Jauffret E, Mamessier E, Birnbaum D, Bertucci F, Lopez M. Overcoming Resistance to Anti-nectin-4 Antibody-Drug Conjugate. Mol Cancer Ther 2022; 21:1227-1235. [PMID: 35534238 DOI: 10.1158/1535-7163.mct-22-0013] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/14/2022] [Accepted: 04/28/2022] [Indexed: 11/16/2022]
Abstract
Antibody-drug conjugates (ADCs) represent a fast-growing drug class in oncology. However, ADCs are associated with resistance, and therapies able to overcome it are of utmost importance. Recently, enfortumab vedotin-ejfv (EV) was approved in nectin-4+ metastatic urothelial cancer. We previously described PVRL4/nectin-4, as a new therapeutic target in breast cancer (BC), and produced an efficient EV-like ADC comprising a human anti-nectin-4 monoclonal antibody conjugated to monomethyl auristatin-E (MMAE) named N41mab-vcMMAE. To study the consequence of the long-term treatment with this ADC, we developed a preclinical BC model in mice, and report a mechanism of resistance to N41mab-vcMMAE after a 9- months treatment and a way to reverse it. RNA-sequencing pointed to an upregulation in resistant tumors of ABCB1 expression, encoding the multidrug resistance protein MDR-1/P-glycoprotein (P-gp), associated with focal gene amplification and high protein expression. Sensitivity to N41mab-vcMMAE of the resistant model was restored in vitro by P-gp pharmacological inhibitors, like tariquidar. P-gp is expressed in a variety of normal tissues. By delivering the drug to the tumor more specifically than does classical chemotherapy, we hypothesized that the combined use of ADC with P-gp inhibitors might reverse resistance in vivo without toxicity. Indeed, we showed that the tariquidar/N41mab-vcMMAE combination was well tolerated and induced a rapid regression of ADC-resistant tumors in mice. By contrast, the tariquidar/docetaxel combination was toxic and poorly efficient. These results show that ABC transporter inhibitors can be safely used with ADC to reverse ADC-induced resistance and open new opportunities in the fight against multidrug resistance.
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Affiliation(s)
- Olivier Cabaud
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Ludovic Berger
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Emerence Crompot
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - José Adélaide
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Pascal Finetti
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Sèverine Garnier
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Arnaud Guille
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Nadine Carbuccia
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Anne Farina
- ICEP Platform, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix Marseille Université U105, Institut Paoli-Calmettes, Marseille, France
| | - Emilie Agavnian
- ICEP Platform, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix Marseille Université U105, Institut Paoli-Calmettes, Marseille, France
| | - Max Chaffanet
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Anthony Gonçalves
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Emmanuelle Charafe-Jauffret
- ICEP Platform, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix Marseille Université U105, Institut Paoli-Calmettes, Marseille, France
| | - Emilie Mamessier
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - Daniel Birnbaum
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
| | - François Bertucci
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
- Département d'Oncologie Médicale, Institut Paoli-Calmettes, Marseille, France
| | - Marc Lopez
- Laboratoire d'Oncologie Prédictive, Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille Université U105, Institut Paoli-Calmettes, Label « Ligue contre le cancer », Marseille, France
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2
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Courtier F, Garnier S, Carbuccia N, Guille A, Adélaide J, Chaffanet M, Hirsch P, Paz DL, Slama B, Vey N, Ugo V, Delhommeau F, Rey J, Birnbaum D, Murati A. Targeted molecular characterization shows differences between primary and secondary myelofibrosis. Genes Chromosomes Cancer 2020; 59:30-39. [PMID: 31340059 DOI: 10.1002/gcc.22789] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 06/07/2019] [Accepted: 06/13/2019] [Indexed: 01/24/2023] Open
Abstract
INTRODUCTION In BCR-ABL1-negative myeloproliferative neoplasms, myelofibrosis (MF) is either primary (PMF) or secondary (SMF) to polycythemia vera or essential thrombocythemia. MF is characterized by an increased risk of transformation to acute myeloid leukemia (AML) and a shortened life expectancy. METHODS Because natural histories of PMF and SMF are different, we studied by targeted next generation sequencing the differences in the molecular landscape of 86 PMF and 59 SMF and compared their prognosis impact. RESULTS PMF had more ASXL1 (47.7%) and SRSF2 (14%) gene mutations than SMF (respectively 27.1% and 3.4%, P = .04). Poorer survival was associated with RNA splicing mutations (especially SRSF2) and TP53 in PMF (P = .0003), and with ASXL1 and TP53 mutations in SMF (P < .0001). These mutations of poor prognosis were associated with biological features of scoring systems (DIPSS and MYSEC-PM score). Mutations in TP53/SRSF2 in PMF or TP53/ASXL1 in SMF were more frequent as the risk of these scores increased. This allowed for a better stratification of MF patients, especially within the DIPSS intermediate-1 risk group (DIPSS) or the MYSEC-PM high risk group. AML transformation occurred faster in SMF than in PMF and patients who transformed to AML were more SRSF2-mutated and less CALR-mutated at MF sampling. CONCLUSIONS PMF and SMF have different but not specific molecular profiles and different prognosis depending on the molecular profile. This may be due to differences in disease history. Combining mutations and existing scores should improve prognosis assessment.
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Affiliation(s)
- Frédéric Courtier
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Séverine Garnier
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France
| | - Nadine Carbuccia
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France
| | - Arnaud Guille
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France
| | - José Adélaide
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France
| | - Max Chaffanet
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Pierre Hirsch
- Centre de Recherche Saint-Antoine CRSA, APHP, Hôpital Saint-Antoine, Sorbonne Université, Inserm, Paris, France
| | | | - Bohrane Slama
- Centre Hospitalier Général d'Avignon, Service d'Onco-Hématologie, France
| | - Norbert Vey
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Aix-Marseille Université, Marseille, France.,Département d'Hématologie, IPC, Marseille, France
| | - Valérie Ugo
- Laboratoire d'Hématologie, CHU d'Angers, Angers, France
| | - François Delhommeau
- Centre de Recherche Saint-Antoine CRSA, APHP, Hôpital Saint-Antoine, Sorbonne Université, Inserm, Paris, France
| | - Jérome Rey
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Hématologie, IPC, Marseille, France
| | - Daniel Birnbaum
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Anne Murati
- Centre de Recherche en Cancérologie de Marseille (CRCM), Inserm, Marseille, France.,Département d'Oncologie Prédictive, Institut Paoli-Calmettes (IPC), Marseille, France.,Département de BioPathologie, IPC, Marseille, France
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3
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Wanquet A, Courtier F, Guille A, Carbuccia N, Garnier S, Adélaide J, Gelsi-Boyer V, Mozziconacci MJ, Rey J, Vey N, Birnbaum D, Murati A. Mutation patterns in essential thrombocythemia, polycythemia vera and secondary myelofibrosis. Leuk Lymphoma 2019; 60:1289-1293. [PMID: 30601073 DOI: 10.1080/10428194.2018.1522437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Anne Wanquet
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France.,b Aix-Marseille Université , Marseille , France.,c Département d'Hématologie , Institut Paoli-Calmettes , Marseille , France
| | - Frédéric Courtier
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France.,b Aix-Marseille Université , Marseille , France
| | - Arnaud Guille
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France
| | - Nadine Carbuccia
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France
| | - Séverine Garnier
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France
| | - José Adélaide
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France
| | - Véronique Gelsi-Boyer
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France.,b Aix-Marseille Université , Marseille , France.,d Département de BioPathologie , Institut Paoli-Calmettes , Marseille , France
| | | | - Jérôme Rey
- c Département d'Hématologie , Institut Paoli-Calmettes , Marseille , France
| | - Norbert Vey
- b Aix-Marseille Université , Marseille , France.,c Département d'Hématologie , Institut Paoli-Calmettes , Marseille , France
| | - Daniel Birnbaum
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France.,b Aix-Marseille Université , Marseille , France
| | - Anne Murati
- a Laboratoire d'Oncologie Prédictive , Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille , Inserm U1068 CNRS UMR 7258 , Marseille , France.,b Aix-Marseille Université , Marseille , France.,d Département de BioPathologie , Institut Paoli-Calmettes , Marseille , France
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4
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Chanez B, Chaffanet M, Adélaide J, Thomassin J, Garnier S, Carbuccia N, Guille A, Charrier N, Brenot-Rossi I, Walz J, Pignot G, Pakradouni J, Gonçalvès A, Eisinger F, Bertucci F, Birnbaum D, Gravis G. Poly (ADP-Ribose) Polymerase Inhibitors for De Novo BRCA2-Null Small-Cell Prostate Cancer. JCO Precis Oncol 2018; 2:1-8. [DOI: 10.1200/po.18.00083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Brice Chanez
- All authors: Institut Paoli-Calmettes, Marseille, France
| | - Max Chaffanet
- All authors: Institut Paoli-Calmettes, Marseille, France
| | - José Adélaide
- All authors: Institut Paoli-Calmettes, Marseille, France
| | | | | | | | - Arnaud Guille
- All authors: Institut Paoli-Calmettes, Marseille, France
| | | | | | - Jochen Walz
- All authors: Institut Paoli-Calmettes, Marseille, France
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Brecqueville M, Rey J, Devillier R, Guille A, Gillet R, Adélaide J, Gelsi-Boyer V, Arnoulet C, Chaffanet M, Mozziconacci MJ, Vey N, Birnbaum D, Murati A. Array comparative genomic hybridization and sequencing of 23 genes in 80 patients with myelofibrosis at chronic or acute phase. Haematologica 2013; 99:37-45. [PMID: 23996481 DOI: 10.3324/haematol.2013.091454] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Myelofibrosis is a myeloproliferative neoplasm that occurs de novo (primary myelofibrosis) or results from the progression of polycythemia vera or essential thrombocytemia (hereafter designated as secondary myelofibrosis or post-polycythemia vera/ essential thrombocythemia myelofibrosis). To progress in the understanding of myelofibrosis and to find molecular prognostic markers we studied 104 samples of primary and secondary myelofibrosis at chronic (n=68) and acute phases (n=12) from 80 patients, by using array-comparative genomic hybridization and sequencing of 23 genes (ASXL1, BMI1, CBL, DNMT3A, EZH2, IDH1/2, JAK2, K/NRAS, LNK, MPL, NF1, PPP1R16B, PTPN11, RCOR1, SF3B1, SOCS2, SRSF2, SUZ12, TET2, TP53, TRPS1). We found copy number aberrations in 54% of samples, often involving genes with a known or potential role in leukemogenesis. We show that cases carrying a del(20q), del(17) or del(12p) evolve in acute myeloid leukemia (P=0.03). We found that 88% of the cases were mutated, mainly in signaling pathway (JAK2 69%, NF1 6%) and epigenetic genes (ASXL1 26%, TET2 14%, EZH2 8%). Overall survival was poor in patients with more than one mutation (P=0.001) and in patients with JAK2/ASXL1 mutations (P=0.02). Our study highlights the heterogeneity of myelofibrosis, and points to several interesting copy number aberrations and genes with diagnostic and prognostic impact.
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Murati A, Arnoulet C, Lafage-Pochitaloff M, Adélaide J, Derré M, Slama B, Delaval B, Popovici C, Vey N, Xerri L, Mozziconacci MJ, Boulat O, Sainty D, Birnbaum D, Chaffanet M. Dual lympho-myeloproliferative disorder in a patient with t(8;22) with BCR-FGFR1 gene fusion. Int J Oncol 2005; 26:1485-92. [PMID: 15870860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
The case of a patient presenting with a myeloproliferative disorder (MPD) characterized by a t(8;22) (p12;q11) translocation was investigated. The rearrangement resulted in the production of BCR-FGFR1 and FGFR1-BCR chimeric transcripts after in-frame fusions of BCR exon 4 with FGFR1 exon 9 and FGFR1 exon 8 with BCR exon 5, respectively. The four previously reported patients with such translocation presented with an atypical chronic myeloid leukemia (CML) without Philadelphia chromosome. In addition to a myeloproliferation, the patient had a B cell proliferation. The phenotypic characterization of the lymphoid cells in the bone marrow showed a continuum of maturation from blast B cells to polyclonal lymphocytes. In the blood, B cells showed a complete polyclonal maturation. The BCR-FGFR1 gene fusion was detected by dual-color fluorescence in situ hybridization in both CD19- and CD19+ populations. In contrast to the other FGFR1-MPDs that show myeloid and T cell proliferation, we propose that this t(8;22) MPD is a myeloid and B cell disease, and potentially a novel type of hematological disease. Although the FGFR1-MPD is rare, its study provides interesting clues to the understanding of hematopoietic stem cell biology and oncogene activation.
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Affiliation(s)
- Anne Murati
- Department of Molecular Oncology, Marseille Cancer Institute, UMR599 Inserm and Paoli-Calmettes Institute, Marseille, France
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7
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Murati A, Arnoulet C, Lafage-Pochitaloff M, Adélaide J, Derré M, Slama B, Delaval B, Popovici C, Vey N, Xerri L, Joelle Mozziconacci M, Boulat O, Sainty D, Birnbaum D, Chaffanet M. Dual lympho-myeloproliferative disorder in a patient with t(8;22) with BCR-FGFR1 gene fusion. Int J Oncol 2005. [DOI: 10.3892/ijo.26.6.1485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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8
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Popovici C, Basset C, Bertucci F, Orsetti B, Adélaide J, Mozziconacci MJ, Conte N, Murati A, Ginestier C, Charafe-Jauffret E, Ethier SP, Lafage-Pochitaloff M, Theillet C, Birnbaum D, Chaffanet M. Reciprocal translocations in breast tumor cell lines: cloning of a t(3;20) that targets the FHIT gene. Genes Chromosomes Cancer 2002; 35:204-18. [PMID: 12353263 DOI: 10.1002/gcc.10107] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
All molecular alterations that lead to breast cancer are not precisely known. We are evaluating the frequency and consequences of reciprocal translocations in breast cancer. We surveyed 15 mammary cell lines by multicolor fluorescence in situ hybridization (M-FISH). We identified nine apparently reciprocal translocations. Using mBanding FISH and FISH with selected YAC clones, we identified the breakpoints for four of them, and cloned the t(3;20)(p14;p11) found in the BrCa-MZ-02 cell line. We found that the breakpoint targets the potential tumor-suppressor gene FHIT (fragile histidine triad) in the FRA3B region; it is accompanied by homozygous deletion of exon 5 of the gene and absence of functional FHIT and fusion transcripts, which leads to the loss of FHIT protein expression. Additional experiments using comparative genomic hybridization provided further information on the genomic context in which the t(3;20)(p14;p11) reciprocal translocation was found.
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MESH Headings
- Acid Anhydride Hydrolases
- Base Sequence
- Breast Neoplasms/genetics
- Chromosome Banding
- Chromosome Breakage/genetics
- Chromosome Deletion
- Chromosome Fragility/genetics
- Chromosome Mapping
- Chromosome Painting
- Chromosomes, Artificial, Yeast/genetics
- Chromosomes, Human, Pair 20/genetics
- Chromosomes, Human, Pair 3/genetics
- Cloning, Molecular/methods
- Exons/genetics
- Genes, Tumor Suppressor
- Genetic Markers/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Karyotyping
- Molecular Sequence Data
- Neoplasm Proteins/biosynthesis
- Neoplasm Proteins/genetics
- Translocation, Genetic/genetics
- Tumor Cells, Cultured
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Affiliation(s)
- Cornel Popovici
- Département d'Oncologie Moléculaire, Institut Paoli-Calmettes, Marseille, France
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9
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Abstract
The human CCND1/PRAD1 gene, located in the 11q13 chromosomal region, encodes a cyclin D protein with potential oncogenic capacity and is involved in several human malignancies. The amplification and expression status of CCND1 was investigated in a series of oesophageal tumours. CCND1 is amplified in 54% and overexpressed in 63% of the tumours of the squamous cell type.
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Affiliation(s)
- J Adélaide
- Laboratoire de Biologie des Tumeurs, Institut Paoli-Calmettes, Marseille, France
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10
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Jacquemier J, Molès JP, Penault-Llorca F, Adélaide J, Torrente M, Viens P, Birnbaum D, Theillet C. p53 immunohistochemical analysis in breast cancer with four monoclonal antibodies: comparison of staining and PCR-SSCP results. Br J Cancer 1994; 69:846-52. [PMID: 7514027 PMCID: PMC1968919 DOI: 10.1038/bjc.1994.164] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The expression of p53 protein was examined in a series of 136 primary breast carcinomas, 106 of which were analysed with a panel of four monoclonal antibodies (MAbs 1801, 240, DO7 and DO1). p53 expression was detected with at least one antibody in 40 tumours (38%), whereas only 15 tumours (14%) were positive with all four antibodies. Some variability in the immunostaining could be observed depending on the antibody used. This was noticeable both for the number of positive cells within a section and for the intensity of staining. We therefore selected a panel of 17 tumour sections (nine were highly positive, three with medium to low staining and five with low to negative staining), which we analysed by polymerase chain reaction-single-strand conformation polymorphism analysis (PCR-SSCP) for the presence of a p53 mutation at the molecular level. Mutations were identified in 15 cases. Therefore the proportion of p53-stained cells does not seem to be an exact representation of the number of cancer cells bearing a mutation within a tumour. A statistically significant correlation was observed between p53 expression, regardless of the number of positive antibodies, and grade III disease (P < 0.0001), oestrogen (P < 0.0001) or progesterone receptor negativity (P = 0.0061), increased Ki 67 index (P = 0.0018), epidermal growth factor receptor (EGFR) positivity (P = 0.0076) and aneuploidy (P = 0.037). No correlation was observed with tumour size or lymph node involvement. In univariate analysis p53 expression was not correlated with disease-free survival, in contrast to the classical prognostic parameters, which were statistically correlated. In this series p53 expression was not a marker of early recurrence.
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Affiliation(s)
- J Jacquemier
- Département d'Anatomo-Pathologie, Institut Paoli-Calmettes, Marseille, France
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