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Ricordel C, Chaillot L, Vlachavas EI, Logotheti M, Jouannic A, Desvallees T, Lecuyer G, Aubry M, Kontogianni G, Mastrokalou C, Jouan F, Jarry U, Corre R, Le Guen Y, Guillaudeux T, Lena H, Chatziioannou A, Pedeux R. Genomic characteristics and clinical significance of CD56+ circulating tumor cells in small cell lung cancer. Sci Rep 2023; 13:3626. [PMID: 36869231 PMCID: PMC9984363 DOI: 10.1038/s41598-023-30536-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
Circulating tumor cells (CTC) have been studied in various solid tumors but clinical utility of CTC in small cell lung cancer (SCLC) remains unclear. The aim of the CTC-CPC study was to develop an EpCAM-independent CTC isolation method allowing isolation of a broader range of living CTC from SCLC and decipher their genomic and biological characteristics. CTC-CPC is a monocentric prospective non-interventional study including treatment-naïve newly diagnosed SCLC. CD56+ CTC were isolated from whole blood samples, at diagnosis and relapse after first-line treatment and submitted to whole-exome-sequencing (WES). Phenotypic study confirms tumor lineage and tumorigenic properties of isolated cells for the 4 patients analyzed with WES. WES of CD56+ CTC and matched tumor biopsy reveal genomic alteration frequently impaired in SCLC. At diagnosis CD56+ CTC were characterized by a high mutation load, a distinct mutational profile and a unique genomic signature, compared to match tumors biopsies. In addition to classical pathways altered in SCLC, we found new biological processes specifically affected in CD56+ CTC at diagnosis. High numeration of CD56+ CTC (> 7/ml) at diagnosis was associated with ES-SCLC. Comparing CD56+ CTC isolated at diagnosis and relapse, we identify differentially altered oncogenic pathways (e.g. DLL3 or MAPK pathway). We report a versatile method of CD56+ CTC detection in SCLC. Numeration of CD56+ CTC at diagnosis is correlated with disease extension. Isolated CD56+ CTC are tumorigenic and show a distinct mutational profile. We report a minimal gene set as a unique signature of CD56+ CTC and identify new affected biological pathways enriched in EpCAM-independent isolated CTC in SCLC.
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Affiliation(s)
- Charles Ricordel
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France.
- Service de Pneumologie, Hôpital Pontchaillou, CHU Rennes, 2 Rue Henri Le Guilloux, 35033, Rennes, France.
| | - L Chaillot
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France
| | - E I Vlachavas
- e-NIOS PC, Kallithea-Athens, Greece
- Division of Molecular Genome Analysis (B050), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | | | - A Jouannic
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France
| | - T Desvallees
- CNRS, INSERM, BIOSIT UAR 3480, US_S 018, Oncotrial, Univ Rennes, 35000, Rennes, France
- Unité De Pharmacologie Préclinique, Biotrial Pharmacology, Rennes, France
| | - G Lecuyer
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France
| | - M Aubry
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France
| | - G Kontogianni
- Centre of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Ephessiou Street, 11527, Athens, Greece
| | | | - F Jouan
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France
| | - U Jarry
- CNRS, INSERM, BIOSIT UAR 3480, US_S 018, Oncotrial, Univ Rennes, 35000, Rennes, France
- Unité De Pharmacologie Préclinique, Biotrial Pharmacology, Rennes, France
| | - R Corre
- Service de Pneumologie, Hôpital Pontchaillou, CHU Rennes, 2 Rue Henri Le Guilloux, 35033, Rennes, France
| | - Y Le Guen
- Service de Pneumologie, Hôpital Pontchaillou, CHU Rennes, 2 Rue Henri Le Guilloux, 35033, Rennes, France
| | - T Guillaudeux
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France
- CNRS, INSERM, BIOSIT UAR 3480, US_S 018, Oncotrial, Univ Rennes, 35000, Rennes, France
| | - H Lena
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France
- Service de Pneumologie, Hôpital Pontchaillou, CHU Rennes, 2 Rue Henri Le Guilloux, 35033, Rennes, France
| | - A Chatziioannou
- e-NIOS PC, Kallithea-Athens, Greece
- Centre of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Ephessiou Street, 11527, Athens, Greece
| | - Rémy Pedeux
- INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugene Marquis, Univ Rennes 1, 35000, Rennes, France.
- CNRS, INSERM, BIOSIT UAR 3480, US_S 018, Oncotrial, Univ Rennes, 35000, Rennes, France.
- CLCC Eugène Marquis, INSERM U1242-OSS, Université Rennes 1, Rue Bataille Flandres Dunkerque, 35042, Rennes, France.
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Arabatzis M, Kollia K, Menounos P, Logotheti M, Velegraki A. Delineation of Clavispora lusitaniae clinical isolates by polymerase chain reaction-single strand conformation polymorphism analysis of the ITSI region: a retrospective study comparing five typing methods. Med Mycol 2004; 42:27-34. [PMID: 14982111 DOI: 10.1080/1369378032000141444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 10/26/2022] Open
Abstract
Strain delineation of the emerging opportunistic pathogen Clavispora lusitaniae was studied using 12 strains, including two strains of known opposite mating type, CBS 6936 (h+) and CBS 5094 (h-), and 10 strains isolated between 1998 and 2001 from immunocompromized patients. This retrospective study assessed the occurrence of C. lusitaniae subtypes within and among hospitals, and in outpatients who were regularly screened for fungal infections in the course of radio-chemotherapy. Strain typing was accomplished for the first time using single strand conformation polymorphism (SSCP) analysis of amplicons of the ribosomal DNA internal transcribed spacer (ITS) 1 and 2 regions. The results were compared with those produced by three pulsed-field gel electrophoresis (PFGE) methods and PCR fingerprinting with the minisatellite-specific primer M13. Karyotyping separated 7-9 chromosomes, not 6-8 as previously reported. Pulsotyping of SfiI and NotI digested chromosomes grouped isolates in five and four distinct clusters, respectively. All methods revealed strain heterogeneity, though not as extensive as previously recorded. SSCP analysis of the ITS1 region generated five subtypes, based on a sequencing-confirmed nucleotide polymorphism. The discriminatory power of this method was high. All strains displayed a homogeneous SSCP pattern for the ITS2 region. ITS1 PCR-SSCP appears to allow rapid and reliable delineation of C. lusitaniae strains. Pending examination of a larger sample size and interlaboratory study, this protocol can be recommended for rapid prospective identification of hospital outbreaks.
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Affiliation(s)
- M Arabatzis
- Mycology Reference Laboratory Department of Microbiology, Medical School, University of Athens, Athens, Greece
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