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  1. Article: Transient Receptor Potential (TRP) Ion Channels Involved in Malignant Glioma Cell Death and Therapeutic Perspectives.

    Lefranc, Florence

    Frontiers in cell and developmental biology

    2021  Volume 9, Page(s) 618961

    Abstract: Among the most biologically, thus clinically, aggressive primary brain tumors are found malignant gliomas. Despite recent advances in adjuvant therapies, which include targeted and immunotherapies, after surgery and radio/chemotherapy, the tumor is ... ...

    Abstract Among the most biologically, thus clinically, aggressive primary brain tumors are found malignant gliomas. Despite recent advances in adjuvant therapies, which include targeted and immunotherapies, after surgery and radio/chemotherapy, the tumor is recurrent and always lethal. Malignant gliomas also contain a pool of initiating stem cells that are highly invasive and resistant to conventional treatment. Ion channels and transporters are markedly involved in cancer cell biology, including glioma cell biology. Transient receptor potential (TRP) ion channels are calcium-permeable channels implicated in Ca
    Language English
    Publishing date 2021-08-12
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2737824-X
    ISSN 2296-634X
    ISSN 2296-634X
    DOI 10.3389/fcell.2021.618961
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Transient Receptor Potential (TRP) Ion Channels Involved in Malignant Glioma Cell Death and Therapeutic Perspectives

    Florence Lefranc

    Frontiers in Cell and Developmental Biology, Vol

    2021  Volume 9

    Abstract: Among the most biologically, thus clinically, aggressive primary brain tumors are found malignant gliomas. Despite recent advances in adjuvant therapies, which include targeted and immunotherapies, after surgery and radio/chemotherapy, the tumor is ... ...

    Abstract Among the most biologically, thus clinically, aggressive primary brain tumors are found malignant gliomas. Despite recent advances in adjuvant therapies, which include targeted and immunotherapies, after surgery and radio/chemotherapy, the tumor is recurrent and always lethal. Malignant gliomas also contain a pool of initiating stem cells that are highly invasive and resistant to conventional treatment. Ion channels and transporters are markedly involved in cancer cell biology, including glioma cell biology. Transient receptor potential (TRP) ion channels are calcium-permeable channels implicated in Ca2+ changes in multiple cellular compartments by modulating the driving force for Ca2+ entry. Recent scientific reports have shown that these channels contribute to the increase in glioblastoma aggressiveness, with glioblastoma representing the ultimate level of glioma malignancy. The current review focuses on each type of TRP ion channel potentially involved in malignant glioma cell death, with the ultimate goal of identifying new therapeutic targets to clinically combat malignant gliomas. It thus appears that cannabidiol targeting the TRPV2 type could be such a potential target.
    Keywords malignant glioma ; cell death ; TRP ion channels ; treatment ; cannabidiol ; Biology (General) ; QH301-705.5
    Subject code 610
    Language English
    Publishing date 2021-08-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Marine-Derived Leads as Anticancer Candidates by Disrupting Hypoxic Signaling through Hypoxia-Inducible Factors Inhibition.

    Garcia, Maria Rita / Andrade, Paula B / Lefranc, Florence / Gomes, Nelson G M

    Marine drugs

    2024  Volume 22, Issue 4

    Abstract: The inadequate vascularization seen in fast-growing solid tumors gives rise to hypoxic areas, fostering specific changes in gene expression that bolster tumor cell survival and metastasis, ultimately leading to unfavorable clinical prognoses across ... ...

    Abstract The inadequate vascularization seen in fast-growing solid tumors gives rise to hypoxic areas, fostering specific changes in gene expression that bolster tumor cell survival and metastasis, ultimately leading to unfavorable clinical prognoses across different cancer types. Hypoxia-inducible factors (HIF-1 and HIF-2) emerge as druggable pivotal players orchestrating tumor metastasis and angiogenesis, thus positioning them as prime targets for cancer treatment. A range of HIF inhibitors, notably natural compounds originating from marine organisms, exhibit encouraging anticancer properties, underscoring their significance as promising therapeutic options. Bioprospection of the marine environment is now a well-settled approach to the discovery and development of anticancer agents that might have their medicinal chemistry developed into clinical candidates. However, despite the massive increase in the number of marine natural products classified as 'anticancer leads,' most of which correspond to general cytotoxic agents, and only a few have been characterized regarding their molecular targets and mechanisms of action. The current review presents a critical analysis of inhibitors of HIF-1 and HIF-2 and hypoxia-selective compounds that have been sourced from marine organisms and that might act as new chemotherapeutic candidates or serve as templates for the development of structurally similar derivatives with improved anticancer efficacy.
    MeSH term(s) Humans ; Aquatic Organisms ; Antineoplastic Agents/pharmacology ; Antineoplastic Agents/therapeutic use ; Animals ; Signal Transduction/drug effects ; Neoplasms/drug therapy ; Neoplasms/pathology ; Biological Products/pharmacology ; Biological Products/chemistry ; Biological Products/therapeutic use ; Hypoxia-Inducible Factor 1/antagonists & inhibitors ; Hypoxia-Inducible Factor 1/metabolism ; Basic Helix-Loop-Helix Transcription Factors/metabolism ; Basic Helix-Loop-Helix Transcription Factors/antagonists & inhibitors
    Chemical Substances Antineoplastic Agents ; Biological Products ; Hypoxia-Inducible Factor 1 ; endothelial PAS domain-containing protein 1 (1B37H0967P) ; Basic Helix-Loop-Helix Transcription Factors
    Language English
    Publishing date 2024-03-23
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2175190-0
    ISSN 1660-3397 ; 1660-3397
    ISSN (online) 1660-3397
    ISSN 1660-3397
    DOI 10.3390/md22040143
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Cytochrome c - silver nanoparticle interactions: Spectroscopy, thermodynamic and enzymatic activity studies.

    Liu, Wei / Berge-Lefranc, David / Chaspoul, Florence / Slaveykova, Vera I

    Chemico-biological interactions

    2023  Volume 382, Page(s) 110647

    Abstract: Cytochrome c, an iron containing metalloprotein in the mitochondria of the cells with an oxide/redox property, plays key role in the cell apoptotic pathway. In this study, the interaction of silver nanoparticles (AgNPs) with cytochrome c (Cyt c) was ... ...

    Abstract Cytochrome c, an iron containing metalloprotein in the mitochondria of the cells with an oxide/redox property, plays key role in the cell apoptotic pathway. In this study, the interaction of silver nanoparticles (AgNPs) with cytochrome c (Cyt c) was investigated by using a combination of spectroscopic, imaging and thermodynamic techniques, including dynamic light scattering (DLS), ultraviolet-visible (UV-vis) spectroscopy, transmission electron microscopy (TEM), fluorescence spectroscopy, near and far circular dichroism (CD) spectroscopy, and isothermal titration calorimetry (ITC). DLS and UV-vis analysis evidenced the formation of surface complexes of Cyt c on AgNPs. The saturation of surface coverage of AgNPs was observed at 4.36 Cyt c molecules per nm
    MeSH term(s) Cytochromes c ; Metal Nanoparticles/chemistry ; Silver/chemistry ; Thermodynamics ; Protein Structure, Secondary ; Spectrometry, Fluorescence
    Chemical Substances Cytochromes c (9007-43-6) ; Silver (3M4G523W1G)
    Language English
    Publishing date 2023-07-25
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 218799-1
    ISSN 1872-7786 ; 0009-2797
    ISSN (online) 1872-7786
    ISSN 0009-2797
    DOI 10.1016/j.cbi.2023.110647
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: The Association Between Meningioma and Breast Cancer: A Systematic Review and Meta-analysis.

    Degeneffe, Aurélie / De Maertelaer, Viviane / De Witte, Olivier / Lefranc, Florence

    JAMA network open

    2023  Volume 6, Issue 6, Page(s) e2318620

    Abstract: Importance: A potential relationship between meningioma and breast cancer was suggested 70 years ago. However, to date, no conclusive evidence is available on this topic.: Objective: To provide a comprehensive review of the literature on the ... ...

    Abstract Importance: A potential relationship between meningioma and breast cancer was suggested 70 years ago. However, to date, no conclusive evidence is available on this topic.
    Objective: To provide a comprehensive review of the literature on the association of meningioma with breast cancer, supported by a meta-analysis.
    Data sources: A systematic PubMed search was performed up to April 2023 to identify articles on the association of meningioma with breast cancer. The following key words were used strategically: meningioma, breast cancer, breast carcinoma, association, relation.
    Study selection: All studies reporting women diagnosed with meningioma and breast cancer were identified. The search strategy was not limited by study design or publication date but only included articles in English. Additional articles were identified via citation searching. Studies reporting a complete population of meningiomas or breast cancer patients throughout a specific study period and a proportion of patients with a second pathology could be used for the meta-analysis.
    Data extraction and synthesis: Data extraction was performed by 2 authors in accordance with the Preferred Reporting Items for Systematic Reviews (PRISMA) statement. Meta-analyses regarding both populations were performed using a random-effects model. Risk of bias was assessed.
    Main outcomes and measures: The main measures were whether there was an increased prevalence of breast cancer in female patients with meningioma and whether there was an increased prevalence of meningioma in female patients with breast cancer.
    Results: A total of 51 retrospective studies (case reports, case series, and cancer registry reports) describing 2238 patients with both diseases were identified; 18 studies qualified for prevalence analyses and meta-analysis. The random-effects meta-analysis (13 studies) revealed a significantly greater prevalence of breast cancer in female patients with meningioma than in the overall population (odds ratio [OR], 9.87; 95% CI, 7.31-13.32). Meningioma incidence in patients with breast cancer (11 studies) was greater than that in the baseline population; however, the difference according to the random-effects model was not statistically significant (OR, 1.41; 95% CI, 0.99-2.02).
    Conclusions and relevance: This large systematic review and the meta-analysis on the association between meningioma and breast cancer found nearly 10-fold higher odds of breast cancer in female patients with meningioma compared with the general female population. These findings suggest that female patients with meningioma should be screened more intensively for breast cancer. Further research is required to identify the factors causing this association.
    MeSH term(s) Humans ; Female ; Breast Neoplasms/epidemiology ; Breast Neoplasms/diagnosis ; Meningioma/epidemiology ; Retrospective Studies ; Incidence ; Meningeal Neoplasms/epidemiology
    Language English
    Publishing date 2023-06-01
    Publishing country United States
    Document type Meta-Analysis ; Systematic Review ; Journal Article
    ISSN 2574-3805
    ISSN (online) 2574-3805
    DOI 10.1001/jamanetworkopen.2023.18620
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Can magnetisation transfer magnetic resonance imaging help for the follow-up of synthetic hernia composite meshes fate? A pilot study.

    Franconi, Florence / Lefranc, Olivier / Radlovic, Amandine / Lemaire, Laurent

    Magma (New York, N.Y.)

    2022  Volume 35, Issue 6, Page(s) 1021–1029

    Abstract: Purpose: This study aims at evaluating the non-invasive Magnetic Resonance Imaging (MRI) technic to visualize a synthetic composite hernia mesh using a rodent model and to document the integration of this device over 4 months.: Methods: Uncoated ... ...

    Abstract Purpose: This study aims at evaluating the non-invasive Magnetic Resonance Imaging (MRI) technic to visualize a synthetic composite hernia mesh using a rodent model and to document the integration of this device over 4 months.
    Methods: Uncoated polyethylene terephthalate mesh and synthetic composite mesh-faced on the visceral side with a chemically engineered layer of copolymer of glycolide, caprolactone, trimethylene carbonate, and lactide to minimize tissue attachment-were placed intraperitoneally in rats, facing the caecum previously scraped to promote petechial bleeding and subsequent adhesions. Meshes fate follow-up was performed 4, 10, and 16-weeks post-implantation using a rodent dedicated high field MRI. Magnetization transfer (MT) images were acquired, associated with pneumoperitonealMRI performed after intraperitoneal injection of 8 mL gas to induce mechanical stress on the abdominal wall.
    Results: Uncoated meshes were clearly visible using both T2-weighted and MT imaging during the whole study while composite meshes conspicuity was not so evident on T2-weighted MRI and could be improved using MT imaging. Adhesions and collagen infiltration were massive for the uncoated meshes as expected. On the contrary, composite meshes showed very limited adhesion, and, if any, occurring at the edge of the mesh, starting at the fixation points.
    Conclusions: Magnetization transfer imaging allows to detect mesh integration and, associated with pneumoperitoneum, was able to probe the effective minimizing effect of the synthetic polymeric barrier on visceral attachments. However, magnetization transfer imaging could not unambiguously allow the visualization of the mesh through the polymeric barrier.
    MeSH term(s) Rats ; Animals ; Hernia, Ventral/surgery ; Surgical Mesh ; Pilot Projects ; Polyethylene Terephthalates ; Follow-Up Studies ; Tissue Adhesions/pathology ; Magnetic Resonance Imaging/methods ; Collagen
    Chemical Substances Polyethylene Terephthalates ; Collagen (9007-34-5)
    Language English
    Publishing date 2022-05-13
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1160826-2
    ISSN 1352-8661 ; 0968-5243
    ISSN (online) 1352-8661
    ISSN 0968-5243
    DOI 10.1007/s10334-022-01016-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: BOLD fMRI and DTI fiber tracking for preoperative mapping of eloquent cerebral regions in brain tumor patients: impact on surgical approach and outcome.

    Lolli, Valentina Elisabetta / Coolen, Tim / Sadeghi, Niloufar / Voordecker, Philippe / Lefranc, Florence

    Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology

    2023  Volume 44, Issue 8, Page(s) 2903–2914

    Abstract: Purpose: Task-based BOLD fMRI and DTI-fiber tracking have become part of the routine presurgical work-up of brain tumor patients in many institutions. However, their potential impact on both surgical treatment and neurologic outcome remains unclear, in ... ...

    Abstract Purpose: Task-based BOLD fMRI and DTI-fiber tracking have become part of the routine presurgical work-up of brain tumor patients in many institutions. However, their potential impact on both surgical treatment and neurologic outcome remains unclear, in despite of the high costs and complex implementation.
    Methods: We retrospectively investigated whether performing fMRI and DTI-ft preoperatively substantially impacted surgical planning and patient outcome in a series of brain tumor patients. We assessed (i) the quality of fMRI and DTI-ft results, by using a scale of 0-2 (0 = failed mapping; 1 = intermediate confidence; 2 = good confidence), (ii) whether functional planning substantially contributed to defining the surgical strategy to be undertaken (i.e., no surgery, biopsy, or resection, with or without ESM), the surgical entry point and extent of resection, and (iii) the incidence of neurological deficits post-operatively.
    Results: Twenty-seven patients constituted the study population. The mean confidence rating was 1.9/2 for fMRI localization of the eloquent cortex and lateralization of the language function and 1.7/2 for DTI-ft results. Treatment strategy was altered in 33% (9/27) of cases. Surgical entry point was modified in 8% (2/25) of cases. The extent of resection was modified in 40% (10/25). One patient (1/25, 4%) developed one new functional deficit post-operatively.
    Conclusion: Functional MR mapping - which must not be considered an alternative to ESM - has a critical role preoperatively, potentially modifying treatment strategy or increasing the neurosurgeons' confidence in the surgical approach hypothesized based on conventional imaging.
    MeSH term(s) Humans ; Magnetic Resonance Imaging ; Retrospective Studies ; Diffusion Tensor Imaging/methods ; Brain Neoplasms/diagnostic imaging ; Brain Neoplasms/surgery ; Brain Neoplasms/pathology ; Language ; Brain Mapping/methods
    Language English
    Publishing date 2023-03-14
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 2016546-8
    ISSN 1590-3478 ; 1590-1874
    ISSN (online) 1590-3478
    ISSN 1590-1874
    DOI 10.1007/s10072-023-06667-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Caecal digestibility as an approximation of ileal protein digestibility evaluation in rats.

    Guillin, Florence M / Gaudichon, Claire / Guérin-Deremaux, Laetitia / Lefranc-Millot, Catherine / Khodorova, Nadezda / Besançon, Stéphane / Calvez, Juliane

    Journal of nutritional science

    2023  Volume 12, Page(s) e18

    Abstract: The rat model can be used to assess ileal protein digestibility rapidly and in first intention, but no standardised method exists. Our objective was to compare methods to assess protein digestibility, depending on collection site (ileum/caecum) and use ... ...

    Abstract The rat model can be used to assess ileal protein digestibility rapidly and in first intention, but no standardised method exists. Our objective was to compare methods to assess protein digestibility, depending on collection site (ileum/caecum) and use of a non-absorbable marker. A meal containing either casein, gluten or pea protein and chromium oxide as non-absorbable marker was given to male Wistar rats and the entire digestive content was collected 6 h later. Total chromium recovery was incomplete and variable, depending on protein source. We observed no significant difference in digestibility between the methods for any of the protein sources tested. Although none of the methods tested is optimal, our results suggest that caecal digestibility can be used as a proxy of ileal digestibility in rats without using a non-absorbable marker. This simple method makes it possible to evaluate protein digestibility of new alternative protein sources for human consumption.
    MeSH term(s) Humans ; Rats ; Male ; Animals ; Amino Acids/metabolism ; Rats, Wistar ; Ileum/metabolism ; Digestion ; Cecum/metabolism
    Chemical Substances Amino Acids
    Language English
    Publishing date 2023-02-08
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2656288-1
    ISSN 2048-6790 ; 2048-6790
    ISSN (online) 2048-6790
    ISSN 2048-6790
    DOI 10.1017/jns.2023.3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Prognosis of patients treated in a single neurosurgical reference centre for brain metastasis caused by dormant disseminated cells.

    Ferlini, Lorenzo / Peluso, Lorenzo / Lolli, Valentina / Gaspard, Nicolas / Lefranc, Florence

    Oncology letters

    2021  Volume 21, Issue 6, Page(s) 454

    Abstract: Brain metastasis (BM) is a frequent complication of systemic cancer usually associated with poor prognosis. Survival depends on numerous factors, which complicates prognosis and treatment. It has been suggested that BM growing from previously dormant ... ...

    Abstract Brain metastasis (BM) is a frequent complication of systemic cancer usually associated with poor prognosis. Survival depends on numerous factors, which complicates prognosis and treatment. It has been suggested that BM growing from previously dormant disseminated tumour cells (DTCs) may exhibit a milder phenotype than BM derived from continuously progressing metastatic cells; however, to the best of our knowledge, the prognosis of patients presenting with BM from dormant DTCs is unknown. The present study retrospectively compared survival data, collected from a single neurosurgical centre, between patients presenting with BM from previously dormant DTCs and patients with non-dormant BM. A total of 262 medical records were reviewed. In the univariate Cox regression analysis, the median survival of the dormant BM group was statistically longer than that of the non-dormant group (P=0.048); a trend towards a longer survival persisted after correcting for age, presence of breast cancer and treatment options (P=0.057), which are all factors known to influence outcome. The improved outcome of these patients could be considered in models for prognostication. Moreover, the development of therapies able to eradicate dormant DTCs could provide a new promising strategy to prolong the survival of patients with a favourable prognosis.
    Language English
    Publishing date 2021-04-08
    Publishing country Greece
    Document type Journal Article
    ZDB-ID 2573196-8
    ISSN 1792-1082 ; 1792-1074
    ISSN (online) 1792-1082
    ISSN 1792-1074
    DOI 10.3892/ol.2021.12715
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: A ZP1 gene mutation in a patient with empty follicle syndrome: A case report and literature review.

    Pujalte, Mathilde / Camo, Maïté / Celton, Noémie / Attencourt, Christophe / Lefranc, Elodie / Jedraszak, Guillaume / Scheffler, Florence

    European journal of obstetrics, gynecology, and reproductive biology

    2022  Volume 280, Page(s) 193–197

    Abstract: Genuine empty follicle syndrome (gEFS) is a rare cause of female infertility; it is defined as the presence of cumulus-oocyte complexes (COCs) in follicular fluid but the absence of oocytes after denudation in an in vitro fertilization (IVF) programme. ... ...

    Abstract Genuine empty follicle syndrome (gEFS) is a rare cause of female infertility; it is defined as the presence of cumulus-oocyte complexes (COCs) in follicular fluid but the absence of oocytes after denudation in an in vitro fertilization (IVF) programme. Mutations in one of the four genes encoding zona pellucida (ZP) proteins have been implicated in gEFS. The objectives of the present study were to explore the molecular basis of idiopathic infertility in a 35-year-old woman with gEFS (observed after four ovarian retrievals), compare her phenotype and genotype with those of other patients described in the literature, and discuss therapeutic approaches that could be adopted by reproductive health centres in this situation. Sequencing of the ZP genes revealed a new homozygous missense variant in ZP1: c.1097G > A;p.(Arg366Gln). The variant is located in the ZP-N domain, which is essential for ZP protein polymerization. An immunohistochemical assessment of an ovarian biopsy confirmed the absence of ZP1 protein. The novel variant appears to prevent ZP assembly, which would explain the absence of normal oocytes after denudation in our patient (and despite the retrieval of COCs). ZP gene sequencing should be considered for patients with a phenotype suggestive of gEFS. An etiological genetic diagnosis enables appropriate genetic counselling and a switch to an IVF programme (with a suitable denudation technique) or an oocyte donation programme.
    MeSH term(s) Humans ; Female ; Zona Pellucida Glycoproteins/genetics ; Zona Pellucida Glycoproteins/metabolism ; Oocytes/metabolism ; Zona Pellucida/chemistry ; Zona Pellucida/metabolism ; Zona Pellucida/pathology ; Mutation ; Genotype
    Chemical Substances Zona Pellucida Glycoproteins ; ZP1 protein, human
    Language English
    Publishing date 2022-12-10
    Publishing country Ireland
    Document type Review
    ZDB-ID 190605-7
    ISSN 1872-7654 ; 0301-2115 ; 0028-2243
    ISSN (online) 1872-7654
    ISSN 0301-2115 ; 0028-2243
    DOI 10.1016/j.ejogrb.2022.12.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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