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  1. Article: Optical Genome Mapping in Routine Cytogenetic Diagnosis of Acute Leukemia.

    Soler, Gwendoline / Ouedraogo, Zangbéwendé Guy / Goumy, Carole / Lebecque, Benjamin / Aspas Requena, Gaspar / Ravinet, Aurélie / Kanold, Justyna / Véronèse, Lauren / Tchirkov, Andrei

    Cancers

    2023  Volume 15, Issue 7

    Abstract: Cytogenetic aberrations are found in 65% of adults and 75% of children with acute leukemia. Specific aberrations are used as markers for the prognostic stratification of patients. The current standard cytogenetic procedure for acute leukemias is ... ...

    Abstract Cytogenetic aberrations are found in 65% of adults and 75% of children with acute leukemia. Specific aberrations are used as markers for the prognostic stratification of patients. The current standard cytogenetic procedure for acute leukemias is karyotyping in combination with FISH and RT-PCR. Optical genome mapping (OGM) is a new technology providing a precise identification of chromosomal abnormalities in a single approach. In our prospective study, the results obtained using OGM and standard techniques were compared in 29 cases of acute myeloid (AML) or lymphoblastic leukemia (ALL). OGM detected 73% (53/73) of abnormalities identified by standard methods. In AML cases, two single clones and three subclones were missed by OGM, but the assignment of patients to cytogenetic risk groups was concordant in all patients. OGM identified additional abnormalities in six cases, including one cryptic structural variant of clinical interest and two subclones. In B-ALL cases, OGM correctly detected all relevant aberrations and revealed additional potentially targetable alterations. In T-ALL cases, OGM characterized a complex karyotype in one case and identified additional abnormalities in two others. In conclusion, OGM is an attractive alternative to current multiple cytogenetic testing in acute leukemia that simplifies the procedure and reduces costs.
    Language English
    Publishing date 2023-04-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers15072131
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Freezing Does Not Alter Sperm Telomere Length despite Increasing DNA Oxidation and Fragmentation.

    Gouhier, Charlène / Pons-Rejraji, Hanae / Dollet, Sandra / Chaput, Laure / Bourgne, Céline / Berger, Marc / Pereira, Bruno / Tchirkov, Andrei / Brugnon, Florence

    Genes

    2023  Volume 14, Issue 5

    Abstract: Correlations were reported between sperm telomere length (STL) and male fertility, sperm DNA fragmentation, and oxidation. Sperm freezing is widely used for assisted reproductive techniques, fertility preservation, and sperm donation. However, its impact ...

    Abstract Correlations were reported between sperm telomere length (STL) and male fertility, sperm DNA fragmentation, and oxidation. Sperm freezing is widely used for assisted reproductive techniques, fertility preservation, and sperm donation. However, its impact on STL remains unknown. For this study, semen surplus from patients who underwent routine semen analysis were used. The impact of slow freezing on STL was analyzed by performing qPCR before and after freezing. Sperm populations with different STL were evaluated using Q-FISH. The relationship between sperm DNA oxidation, DNA fragmentation, and STL was assessed in fresh and frozen sperm samples. No significant impact of slow freezing on STL was observed, neither measured by qPCR nor Q-FISH. However, Q-FISH allowed for the distinguishing of sperm populations with different STLs within individual sperm samples. Slow freezing induced different STL distributions for some of the analyzed sperm samples, but no correlation was found between STL and sperm DNA fragmentation or oxidation. Slow freezing does not alter STL despite increasing sperm DNA oxidation and fragmentation. As STL alterations could be transmitted to offspring, the lack of impact of the slow freezing method on STL ensures the safety of this procedure.
    MeSH term(s) Male ; Animals ; Freezing ; Spermatozoa ; Semen Analysis/methods ; DNA ; Telomere/genetics
    Chemical Substances DNA (9007-49-2)
    Language English
    Publishing date 2023-05-03
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2527218-4
    ISSN 2073-4425 ; 2073-4425
    ISSN (online) 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes14051039
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Freezing Does Not Alter Sperm Telomere Length despite Increasing DNA Oxidation and Fragmentation

    Gouhier, Charlène / Pons-Rejraji, Hanae / Dollet, Sandra / Chaput, Laure / Bourgne, Céline / Berger, Marc / Pereira, Bruno / Tchirkov, Andrei / Brugnon, Florence

    Genes (Basel). 2023 May 03, v. 14, no. 5

    2023  

    Abstract: Correlations were reported between sperm telomere length (STL) and male fertility, sperm DNA fragmentation, and oxidation. Sperm freezing is widely used for assisted reproductive techniques, fertility preservation, and sperm donation. However, its impact ...

    Abstract Correlations were reported between sperm telomere length (STL) and male fertility, sperm DNA fragmentation, and oxidation. Sperm freezing is widely used for assisted reproductive techniques, fertility preservation, and sperm donation. However, its impact on STL remains unknown. For this study, semen surplus from patients who underwent routine semen analysis were used. The impact of slow freezing on STL was analyzed by performing qPCR before and after freezing. Sperm populations with different STL were evaluated using Q-FISH. The relationship between sperm DNA oxidation, DNA fragmentation, and STL was assessed in fresh and frozen sperm samples. No significant impact of slow freezing on STL was observed, neither measured by qPCR nor Q-FISH. However, Q-FISH allowed for the distinguishing of sperm populations with different STLs within individual sperm samples. Slow freezing induced different STL distributions for some of the analyzed sperm samples, but no correlation was found between STL and sperm DNA fragmentation or oxidation. Slow freezing does not alter STL despite increasing sperm DNA oxidation and fragmentation. As STL alterations could be transmitted to offspring, the lack of impact of the slow freezing method on STL ensures the safety of this procedure.
    Keywords DNA ; DNA fragmentation ; male fertility ; oxidation ; progeny ; semen ; spermatozoa ; telomeres
    Language English
    Dates of publication 2023-0503
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527218-4
    ISSN 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes14051039
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Faster clinical decisions in B-cell acute lymphoblastic leukaemia: A single flow cytometric 12-colour tube improves diagnosis and minimal residual disease follow-up.

    Lebecque, Benjamin / Besombes, Joevin / Dannus, Louis-Thomas / De Antonio, Marie / Cacheux, Victoria / Grèze, Victoria / Montagnon, Valentin / Veronese, Lauren / Tchirkov, Andrei / Tournilhac, Olivier / Berger, Marc G / Veyrat-Masson, Richard

    British journal of haematology

    2024  Volume 204, Issue 5, Page(s) 1872–1881

    Abstract: Assessing minimal residual disease (MRD) in B-cell precursor acute lymphoblastic leukaemia (BCP-ALL) is essential for adjusting therapeutic strategies and predicting relapse. Quantitative polymerase chain reaction (qPCR) is the gold standard for MRD. ... ...

    Abstract Assessing minimal residual disease (MRD) in B-cell precursor acute lymphoblastic leukaemia (BCP-ALL) is essential for adjusting therapeutic strategies and predicting relapse. Quantitative polymerase chain reaction (qPCR) is the gold standard for MRD. Alternatively, flow cytometry is a quicker and cost-effective method that typically uses leukaemia-associated immunophenotype (LAIP) or different-from-normal (DFN) approaches for MRD assessment. This study describes an optimized 12-colour flow cytometry antibody panel designed for BCP-ALL diagnosis and MRD monitoring in a single tube. This method robustly differentiated hematogones and BCP-ALL cells using two specific markers: CD43 and CD81. These and other markers (e.g. CD73, CD66c and CD49f) enhanced the specificity of BCP-ALL cell detection. This innovative approach, based on a dual DFN/LAIP strategy with a principal component analysis method, can be used for all patients and enables MRD analysis even in the absence of a diagnostic sample. The robustness of our method for MRD monitoring was confirmed by the strong correlation (r = 0.87) with the qPCR results. Moreover, it simplifies and accelerates the preanalytical process through the use of a stain/lysis/wash method within a single tube (<2 h). Our flow cytometry-based methodology improves the BCP-ALL diagnosis efficiency and MRD management, offering a complementary method with considerable benefits for clinical laboratories.
    MeSH term(s) Humans ; Neoplasm, Residual/diagnosis ; Flow Cytometry/methods ; Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/diagnosis ; Immunophenotyping/methods ; Male ; Follow-Up Studies ; Female ; Child ; Clinical Decision-Making ; Antigens, CD/analysis ; Child, Preschool
    Chemical Substances Antigens, CD
    Language English
    Publishing date 2024-03-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 80077-6
    ISSN 1365-2141 ; 0007-1048
    ISSN (online) 1365-2141
    ISSN 0007-1048
    DOI 10.1111/bjh.19390
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: The initial molecular response predicts the deep molecular response but not treatment-free remission maintenance in a real-world chronic myeloid leukemia cohort.

    Saugues, Sandrine / Lambert, Céline / Daguenet, Elisabeth / Roth-Guepin, Gabrielle / Huguet, Françoise / Cony-Makhoul, Pascale / Ansah, Hyacinthe Johnson / Escoffre-Barbe, Martine / Turhan, Ali / Rousselot, Philippe / Tchirkov, Andreï / Hamroun, Dalil / Hermet, Eric / Pereira, Bruno / Berger, Marc G

    Haematologica

    2024  

    Abstract: In chronic myeloid leukemia, the identification of early molecular predictors of stable treatment-free remission (TFR) after tyrosine kinase inhibitor (TKI) discontinuation is challenging. The predictive values of residual disease (BCR::ABL1 ... ...

    Abstract In chronic myeloid leukemia, the identification of early molecular predictors of stable treatment-free remission (TFR) after tyrosine kinase inhibitor (TKI) discontinuation is challenging. The predictive values of residual disease (BCR::ABL1 quantification) at months 3 and 6 and more recently, BCR::ABL1 transcript halving time (HT) have been described, but no study compared the predictive value of different early parameters. Using a real-world cohort of 408 patients, we compared the performance of the ELTS score, BCR::ABL1 HT, and residual disease at month 3 and 6 to predict the molecular response, achievement of the TKI discontinuation criteria, and TFR maintenance. The performances of BCR::ABL1 HT and residual disease at month 3 were similar. Residual disease at month 6 displayed the best performance for predicting the optimal response (area under the ROC curve between 0.81 and 0.92; cut-off values: 0.11% for MR4 at month 24 and 0.12% for MR4.5 at month 48). Conversely, no early parameter predicted reaching the TKI discontinuation criteria and TFR maintenance. We obtained similar results when patients were divided in subgroups by first-line treatment (imatinib vs second generation TKI, 2G-TKI). We identified a relationship between ELTS score, earlier milestones and TFR maintenance only in the 2G-TKI group. In conclusion, this first comparative study of early therapeutic response parameters showed that they are excellent indicators of TKI efficacy (BCR::ABL1 transcript reduction) and best responders. Conversely, they did not predict the achievement of the TKI discontinuation criteria and TFR maintenance, suggesting that other parameters are involved in TFR maintenance.
    Language English
    Publishing date 2024-05-02
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 2333-4
    ISSN 1592-8721 ; 0017-6567 ; 0390-6078
    ISSN (online) 1592-8721
    ISSN 0017-6567 ; 0390-6078
    DOI 10.3324/haematol.2023.284860
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Feasibility of Optical Genome Mapping from Placental and Umbilical Cord Sampled after Spontaneous or Therapeutic Pregnancy Termination.

    Goumy, Carole / Ouedraogo, Zangbéwendé Guy / Bellemonte, Elodie / Eymard-Pierre, Eleonore / Soler, Gwendoline / Perthus, Isabelle / Pebrel-Richard, Céline / Gouas, Laetitia / Salaun, Gaëlle / Véronèse, Lauren / Laurichesse, Hélène / Darcha, Claude / Tchirkov, Andrei

    Diagnostics (Basel, Switzerland)

    2023  Volume 13, Issue 23

    Abstract: Optical genome mapping (OGM) is an alternative to classical cytogenetic techniques to improve the detection rate of clinically significant genomic abnormalities. The isolation of high-molecular-weight (HMW) DNA is critical for a successful OGM analysis. ... ...

    Abstract Optical genome mapping (OGM) is an alternative to classical cytogenetic techniques to improve the detection rate of clinically significant genomic abnormalities. The isolation of high-molecular-weight (HMW) DNA is critical for a successful OGM analysis. HMW DNA quality depends on tissue type, sample size, and storage conditions. We assessed the feasibility of OGM analysis of DNA from nine umbilical cord (UC) and six chorionic villus (CV) samples collected after the spontaneous or therapeutic termination of pregnancy. We analyzed quality control metrics provided by the Saphyr system (Bionano Genomics) and assessed the length of extracted DNA molecules using pulsed-field capillary electrophoresis. OMG data were successfully analyzed for all six CV samples. Five of the UC samples did not meet the Saphyr quality criteria, mainly due to poor DNA quality. In this regard, we found that DNA quality assessment with pulsed-field capillary electrophoresis can predict a successful OGM analysis. OGM data were fully concordant with the results of standard cytogenetic methods. Moreover, OGM detected an average of 14 additional structural variants involving OMIM genes per sample. On the basis of our results, we established the optimal conditions for sample storage and preparation required for a successful OGM analysis. We recommend checking DNA quality before analysis with pulsed-field capillary electrophoresis if the storage conditions were not ideal or if the quality of the sample is poor. OGM can therefore be performed on fetal tissue harvested after the termination of pregnancy, which opens up the perspective for improved diagnostic yield.
    Language English
    Publishing date 2023-11-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662336-5
    ISSN 2075-4418
    ISSN 2075-4418
    DOI 10.3390/diagnostics13233576
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Scale-Up of Academic Mesenchymal Stromal Cell Production.

    Laroye, Caroline / Gauthier, Mélanie / Morello, Jessica / Charif, Naceur / Cannard, Véronique Latger / Bonnet, Céline / Lozniewski, Alain / Tchirkov, Andrei / De Isla, Natalia / Decot, Véronique / Reppel, Loïc / Bensoussan, Danièle

    Journal of clinical medicine

    2023  Volume 12, Issue 13

    Abstract: Background: Many clinical trials have reported the use of mesenchymal stromal cells (MSCs) following the indication of severe SARS-CoV-2 infection. However, in the COVID19 pandemic context, academic laboratories had to adapt a production process to ... ...

    Abstract Background: Many clinical trials have reported the use of mesenchymal stromal cells (MSCs) following the indication of severe SARS-CoV-2 infection. However, in the COVID19 pandemic context, academic laboratories had to adapt a production process to obtain MSCs in a very short time. Production processes, especially freezing/thawing cycles, or culture medium have impacts on MSC properties. We evaluated the impact of an intermediate cryopreservation state during MSC culture to increase production yields.
    Methods: Seven Wharton's jelly (WJ)-MSC batches generated from seven different umbilical cords with only one cryopreservation step and 13 WJ-MSC batches produced with intermediate freezing were formed according to good manufacturing practices. The identity (phenotype and clonogenic capacities), safety (karyotype, telomerase activity, sterility, and donor qualification), and functionality (viability, mixed lymphocyte reaction) were analyzed.
    Results: No significant differences between MSC production processes were observed, except for the clonogenic capacity, which was decreased, although it always remained above our specifications.
    Conclusions: Intermediate cryopreservation allows an increase in the production yield and has little impact on the basic characteristics of MSCs.
    Language English
    Publishing date 2023-06-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12134414
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Optical genome mapping for prenatal diagnosis: A prospective study.

    Goumy, Carole / Guy Ouedraogo, Zangbéwendé / Soler, Gwendoline / Eymard-Pierre, Eleonore / Laurichesse, Hélène / Delabaere, Amélie / Gallot, Denis / Bouchet, Pamela / Perthus, Isabelle / Pebrel-Richard, Céline / Gouas, Laetitia / Salaun, Gaëlle / Salse, Jérôme / Véronèse, Lauren / Tchirkov, Andrei

    Clinica chimica acta; international journal of clinical chemistry

    2023  Volume 551, Page(s) 117594

    Abstract: Purpose: Cytogenetic analysis provides important information for prenatal decision-making and genetic counseling. Optical genome mapping (OGM) has demonstrated its performances in retrospective studies. In our prospective study, we assessed the quality ... ...

    Abstract Purpose: Cytogenetic analysis provides important information for prenatal decision-making and genetic counseling. Optical genome mapping (OGM) has demonstrated its performances in retrospective studies. In our prospective study, we assessed the quality of DNA obtained from cultures of amniotic fluid (AF) and chorionic villi (CV) and evaluated the ability of OGM to detect all clinically relevant aberrations identified by standard methods.
    Methods: A total of 37 prenatal samples from pregnancies with a fetal anomaly on ultrasound were analyzed prospectively by OGM between January 1, 2021 and June 31, 2022. OGM results were interpreted blindly and compared to the results obtained by standard techniques.
    Results: OGM results were interpretable in 92% of samples. We observed 100% concordance between OGM and karyotype and/or chromosomal microarray results. In addition, OGM identified a median of 30 small (<100 kb) structural variations per case with the involvement of 12 OMIM genes, of which 3 were OMIM morbid genes.
    Conclusion: This prospective study showed OGM performed well in detecting genomic alterations in cell cultures from prenatal samples. The place of OGM in relation to CMA or exome sequencing remains to be defined in order to optimize the prenatal diagnostic procedure.
    MeSH term(s) Pregnancy ; Female ; Humans ; Prospective Studies ; Retrospective Studies ; Karyotyping ; Cytogenetic Analysis ; Chromosome Mapping ; Prenatal Diagnosis ; Chromosome Aberrations
    Language English
    Publishing date 2023-10-12
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 80228-1
    ISSN 1873-3492 ; 0009-8981
    ISSN (online) 1873-3492
    ISSN 0009-8981
    DOI 10.1016/j.cca.2023.117594
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: The Spliceosome: A New Therapeutic Target in Chronic Myeloid Leukaemia.

    Lebecque, Benjamin / Bourgne, Celine / Munje, Chinmay / Berger, Juliette / Tassin, Thomas / Cony-Makhoul, Pascale / Guerci-Bresler, Agnès / Johnson-Ansah, Hyacinthe / Liu, Wei / Saugues, Sandrine / Tchirkov, Andrei / Vetrie, David / Copland, Mhairi / Berger, Marc G

    Cancers

    2022  Volume 14, Issue 19

    Abstract: RNA splicing factors are frequently altered in cancer and can act as both oncoproteins and tumour suppressors. They have been found mutated or deregulated, justifying the growing interest in the targeting of splicing catalysis, splicing regulatory ... ...

    Abstract RNA splicing factors are frequently altered in cancer and can act as both oncoproteins and tumour suppressors. They have been found mutated or deregulated, justifying the growing interest in the targeting of splicing catalysis, splicing regulatory proteins, and/or specific, key altered splicing events. We recently showed that the DNA methylation alterations of CD34
    Language English
    Publishing date 2022-09-27
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers14194695
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Reduced telomere length in amniocytes: an early biomarker of abnormal fetal development?

    Goumy, Carole / Veronese, Lauren / Stamm, Rodrigue / Domas, Quentin / Hadjab, Kamil / Gallot, Denis / Laurichesse, Hélène / Delabaere, Amélie / Gouas, Laetitia / Salaun, Gaelle / Perbel-Richard, Céline / Vago, Philippe / Tchirkov, Andrei

    Human molecular genetics

    2022  Volume 31, Issue 16, Page(s) 2669–2677

    Abstract: Telomeres protect chromosome ends and control cell division and senescence. During organogenesis, telomeres need to be long enough to ensure the cell proliferation necessary at this stage of development. Previous studies have shown that telomere ... ...

    Abstract Telomeres protect chromosome ends and control cell division and senescence. During organogenesis, telomeres need to be long enough to ensure the cell proliferation necessary at this stage of development. Previous studies have shown that telomere shortening is associated with growth retardation and congenital malformations. However, these studies were performed in newborns or postnatally, and data on telomere length (TL) during the prenatal period are still very limited. We measured TL using quantitative PCR in amniotic fluid (AF) and chorionic villi (CV) samples from 69 control fetuses with normal ultrasound (52 AF and 17 CV) and 213 fetuses (165 AF and 48 CV) with intrauterine growth retardation (IUGR) or congenital malformations diagnosed by ultrasound. The samples were collected by amniocentesis at the gestational age (GA) of 25.0 ± 5.4 weeks and by CV biopsy at 18.1 ± 6.3 weeks. In neither sample type was TL influenced by GA or fetal sex. In AF, a comparison of abnormal versus normal fetuses showed a significant telomere shortening in cases of IUGR (reduction of 34%, P < 10-6), single (29%, P < 10-6) and multiple (44%, P < 10-6) malformations. Similar TL shortening was also observed in CV from abnormal fetuses but to a lesser extent (25%, P = 0.0002; 18%, P = 0.016; 20%, P = 0.004, respectively). Telomere shortening was more pronounced in cases of multiple congenital anomalies than in fetuses with a single malformation, suggesting a correlation between TL and the severity of fetal phenotype. Thus, TL measurement in fetal samples during pregnancy could provide a novel predictive marker of pathological development.
    MeSH term(s) Biomarkers ; Female ; Fetal Development ; Fetal Growth Retardation/diagnosis ; Fetal Growth Retardation/genetics ; Humans ; Pregnancy ; Telomere/genetics ; Telomere Shortening/genetics
    Chemical Substances Biomarkers
    Language English
    Publishing date 2022-03-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 1108742-0
    ISSN 1460-2083 ; 0964-6906
    ISSN (online) 1460-2083
    ISSN 0964-6906
    DOI 10.1093/hmg/ddac054
    Database MEDical Literature Analysis and Retrieval System OnLINE

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