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Simonin JL, Tomba C, Mercier V, Bacchetta M, Idris T, Badaoui M, Roux A, Chanson M. Apical dehydration impairs the cystic fibrosis airway epithelium barrier via a β1-integrin/YAP1 pathway. Life Sci Alliance 2024; 7:e202302449. [PMID: 38336456 PMCID: PMC10858171 DOI: 10.26508/lsa.202302449] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/31/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024] Open
Abstract
Defective hydration of airway surface mucosa is associated with lung infection in cystic fibrosis (CF), partly caused by disruption of the epithelial barrier integrity. Although rehydration of the CF airway surface liquid (ASL) alleviates epithelium vulnerability to infection by junctional protein expression, the mechanisms linking ASL to barrier integrity are unknown. We show here the strong degradation of YAP1 and TAZ proteins in well-polarized CF human airway epithelial cells (HAECs), a process that was prevented by ASL rehydration. Conditional silencing of YAP1 in rehydrated CF HAECs indicated that YAP1 expression was necessary for the maintenance of junctional complexes. A higher plasma membrane tension in CF HAECs reduced endocytosis, concurrent with the maintenance of active β1-integrin ectopically located at the apical membrane. Pharmacological inhibition of β1-integrin accumulation restored YAP1 expression in CF HAECs. These results indicate that dehydration of the CF ASL affects epithelial plasma membrane tension, resulting in ectopic activation of a β1-integrin/YAP1 signaling pathway associated with degradation of junctional proteins.
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Affiliation(s)
- Juliette L Simonin
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
| | - Caterina Tomba
- https://ror.org/01swzsf04 Department of Biochemistry, Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Vincent Mercier
- https://ror.org/01swzsf04 Department of Biochemistry, Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Marc Bacchetta
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
| | - Tahir Idris
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
| | - Mehdi Badaoui
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
| | - Aurélien Roux
- https://ror.org/01swzsf04 Department of Biochemistry, Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Marc Chanson
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
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Idris T, Bachmann M, Bacchetta M, Wehrle-Haller B, Chanson M, Badaoui M. Akt-driven TGF-β and DKK1 Secretion Impairs F508del CF Airway Epithelium Polarity. Am J Respir Cell Mol Biol 2024. [PMID: 38531016 DOI: 10.1165/rcmb.2023-0408oc] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 03/26/2024] [Indexed: 03/28/2024] Open
Abstract
Epithelial polarity is fundamental in maintaining barrier integrity and tissue protection. In cystic fibrosis (CF), apicobasal polarity of the airway epithelium is altered, resulting in increased apical fibronectin deposition and enhanced susceptibility to bacterial infections. Here, we evaluated the effect of highly effective modulator treatment (HEMT) on fibronectin apical deposition and investigated the intracellular mechanisms triggering the defect in polarity of the CF airway epithelium. To this end, primary cultures of CF (F508del variant) human airway epithelial cells (HAECs) and a HAEC line, Calu-3, knocked-down (KD) for CFTR (CFTR KD) were compared to control counterparts, grown at an air-liquid interface (ALI). We show that CFTR mutation in primary HAECs and CFTR KD cells promote the overexpression and over-secretion of TGF-β1 and DKK1 when cultured at ALI. These dynamic changes result in hyperactivation of the TGF-β pathway and inhibition of the Wnt pathway through degradation of β-catenin leading to imbalanced proliferation and polarization. The abnormal interplay between TGF-β and Wnt signaling pathways is reinforced by aberrant Akt signaling. Pharmacological manipulation of TGF-β, Wnt, and Akt pathways restored polarization of the F508del CF epithelium, a correction that was not achieved by HEMT. Our data shed new insights into the signaling pathways that fine-tune apicobasal polarization in primary airway epithelial cells and may provide an explanation to the mitigated efficacy of HEMT on lung infection in people with CF.
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Affiliation(s)
- Tahir Idris
- University of Geneva, 27212, Cell Physiology and metabolism, Geneva, Switzerland
| | - Michael Bachmann
- University of Geneva, 27212, Cell Physiology and metabolism, Geneva, Switzerland
| | - Marc Bacchetta
- University of Geneva, 27212, Cell Physiology and metabolism, Geneva, Switzerland
| | | | - Marc Chanson
- University of Geneva, 27212, Cell Physiology and metabolism, Geneva, Switzerland;
| | - Mehdi Badaoui
- University of Geneva, 27212, Cell Physiology and metabolism, Geneva, Switzerland
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Badaoui M, Chanson M. Intercellular Communication in Airway Epithelial Cell Regeneration: Potential Roles of Connexins and Pannexins. Int J Mol Sci 2023; 24:16160. [PMID: 38003349 PMCID: PMC10671439 DOI: 10.3390/ijms242216160] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/19/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
Connexins and pannexins are transmembrane proteins that can form direct (gap junctions) or indirect (connexons, pannexons) intercellular communication channels. By propagating ions, metabolites, sugars, nucleotides, miRNAs, and/or second messengers, they participate in a variety of physiological functions, such as tissue homeostasis and host defense. There is solid evidence supporting a role for intercellular signaling in various pulmonary inflammatory diseases where alteration of connexin/pannexin channel functional expression occurs, thus leading to abnormal intercellular communication pathways and contributing to pathophysiological aspects, such as innate immune defense and remodeling. The integrity of the airway epithelium, which is the first line of defense against invading microbes, is established and maintained by a repair mechanism that involves processes such as proliferation, migration, and differentiation. Here, we briefly summarize current knowledge on the contribution of connexins and pannexins to necessary processes of tissue repair and speculate on their possible involvement in the shaping of the airway epithelium integrity.
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Affiliation(s)
| | - Marc Chanson
- Department of Cell Physiology & Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland;
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Badaoui M, Sobolewski C, Luscher A, Bacchetta M, Köhler T, van Delden C, Foti M, Chanson M. Targeting HuR-Vav3 mRNA interaction prevents Pseudomonas aeruginosa adhesion to the cystic fibrosis airway epithelium. JCI Insight 2023; 8:161961. [PMID: 36602863 PMCID: PMC9977432 DOI: 10.1172/jci.insight.161961] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 12/21/2022] [Indexed: 01/06/2023] Open
Abstract
Cystic fibrosis (CF) is characterized by chronic bacterial infections leading to progressive bronchiectasis and respiratory failure. Pseudomonas aeruginosa (Pa) is the predominant opportunistic pathogen infecting the CF airways. The guanine nucleotide exchange factor Vav3 plays a critical role in Pa adhesion to the CF airways by inducing luminal fibronectin deposition that favors bacteria trapping. Here we report that Vav3 overexpression in CF is caused by upregulation of the mRNA-stabilizing protein HuR. We found that HuR accumulates in the cytoplasm of CF airway epithelial cells and that it binds to and stabilizes Vav3 mRNA. Interestingly, disruption of the HuR-Vav3 mRNA interaction improved the CF epithelial integrity, inhibited the formation of the fibronectin-made bacterial docking platforms, and prevented Pa adhesion to the CF airway epithelium. These findings indicate that targeting HuR represents a promising antiadhesive approach in CF that can prevent initial stages of Pa infection in a context of emergence of multidrug-resistant pathogens.
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Affiliation(s)
| | | | - Alexandre Luscher
- Department of Microbiology & Molecular Medicine, Faculty of Medicine, University of Geneva, Switzerland
| | | | - Thilo Köhler
- Department of Microbiology & Molecular Medicine, Faculty of Medicine, University of Geneva, Switzerland
| | - Christian van Delden
- Department of Microbiology & Molecular Medicine, Faculty of Medicine, University of Geneva, Switzerland
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Idris T, Badaoui M, Bacchetta M, Chanson M. 435 Wnt and transforming growth factor beta signaling imbalance in cystic fibrosis airway epithelium polarization. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)01125-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Simonin JL, Luscher A, Losa D, Badaoui M, van Delden C, Köhler T, Chanson M. Surface Hydration Protects Cystic Fibrosis Airways from Infection by Restoring Junctional Networks. Cells 2022; 11:cells11091587. [PMID: 35563895 PMCID: PMC9105190 DOI: 10.3390/cells11091587] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/20/2022] [Accepted: 05/06/2022] [Indexed: 02/01/2023] Open
Abstract
Defective hydration of airway surface mucosa is associated with recurrent lung infection in cystic fibrosis (CF), a disease caused by CF transmembrane conductance regulator (CFTR) gene mutations. Whether the composition and/or presence of an airway surface liquid (ASL) is sufficient to prevent infection remains unclear. The susceptibility to infection of polarized wild type and CFTR knockdown (CFTR-KD) airway epithelial cells was determined in the presence or absence of a healthy ASL or physiological saline. CFTR-KD epithelia exhibited strong ASL volume reduction, enhanced susceptibility to infection, and reduced junctional integrity. Interestingly, the presence of an apical physiological saline alleviated disruption of the airway epithelial barrier by stimulating essential junctional protein expression. Thus, rehydrated CFTR-KD cells were protected from infection despite normally intense bacterial growth. This study indicates that an epithelial integrity gatekeeper is modulated by the presence of an apical liquid volume, irrespective of the liquid's composition and of expression of a functional CFTR.
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Affiliation(s)
- Juliette L. Simonin
- Department of Cell Physiology & Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; (J.L.S.); (D.L.); (M.B.)
| | - Alexandre Luscher
- Department of Microbiology and Molecular Medicine, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; (A.L.); (C.v.D.); (T.K.)
| | - Davide Losa
- Department of Cell Physiology & Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; (J.L.S.); (D.L.); (M.B.)
| | - Mehdi Badaoui
- Department of Cell Physiology & Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; (J.L.S.); (D.L.); (M.B.)
| | - Christian van Delden
- Department of Microbiology and Molecular Medicine, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; (A.L.); (C.v.D.); (T.K.)
- Department of Medicine Specialties, Division of Infectious Diseases, Geneva University Hospitals, 1211 Geneva, Switzerland
| | - Thilo Köhler
- Department of Microbiology and Molecular Medicine, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; (A.L.); (C.v.D.); (T.K.)
| | - Marc Chanson
- Department of Cell Physiology & Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; (J.L.S.); (D.L.); (M.B.)
- Correspondence: ; Tel./Fax: +41-22-37-95-206
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Sehil H, Badaoui M, Chougui A. Preparation and Characterization of a Novel Chemically Crosslinked Chitosane-g-Polyacrylamide Hydrogel as a Promising Adsorbent for the Removal of Methylene Blue from Aqueous Solutions. Polym Sci Ser B 2021. [DOI: 10.1134/s1560090421060269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Badaoui M, Zoso A, Idris T, Bacchetta M, Simonin J, Lemeille S, Wehrle-Haller B, Chanson M. Vav3 Mediates Pseudomonas aeruginosa Adhesion to the Cystic Fibrosis Airway Epithelium. Cell Rep 2021; 32:107842. [PMID: 32640241 DOI: 10.1016/j.celrep.2020.107842] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 11/28/2019] [Revised: 04/13/2020] [Accepted: 06/09/2020] [Indexed: 01/08/2023] Open
Abstract
Pseudomonas aeruginosa (Pa) represents the leading cause of airway infection in cystic fibrosis (CF). Early airways colonization can be explained by enhanced adhesion of Pa to the respiratory epithelium. RNA sequencing (RNA-seq) on fully differentiated primary cultures of airway epithelial cells from CF and non-CF donors predict that VAV3, β1 INTEGRIN, and FIBRONECTIN genes are significantly enriched in CF. Indeed, Vav3 is apically overexpressed in CF, associates with active β1 integrin luminally exposed, and increases fibronectin deposition. These luminal microdomains, rich in fibronectin and β1 integrin and regulated by Vav3, mediate the increased Pa adhesion to the CF epithelium. Interestingly, Vav3 inhibition normalizes the CF-dependent fibronectin and β1-integrin ectopic expression, improves the CF epithelial integrity, and prevents the enhanced Pa trapping to the CF epithelium. Through its capacity to promote a luminal complex with active β1 integrin and fibronectin that favors bacteria trapping, Vav3 may represent a new target in CF.
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Affiliation(s)
- Mehdi Badaoui
- Faculty of Medicine, Department of Pediatrics, Gynecology & Obstetrics, University of Geneva, Geneva 1211, Switzerland; Faculty of Medicine, Department of Cell Physiology & Metabolism, University of Geneva, Geneva 1211, Switzerland
| | - Alice Zoso
- Faculty of Medicine, Department of Pediatrics, Gynecology & Obstetrics, University of Geneva, Geneva 1211, Switzerland; Faculty of Medicine, Department of Cell Physiology & Metabolism, University of Geneva, Geneva 1211, Switzerland
| | - Tahir Idris
- Faculty of Medicine, Department of Pediatrics, Gynecology & Obstetrics, University of Geneva, Geneva 1211, Switzerland; Faculty of Medicine, Department of Cell Physiology & Metabolism, University of Geneva, Geneva 1211, Switzerland
| | - Marc Bacchetta
- Faculty of Medicine, Department of Pediatrics, Gynecology & Obstetrics, University of Geneva, Geneva 1211, Switzerland; Faculty of Medicine, Department of Cell Physiology & Metabolism, University of Geneva, Geneva 1211, Switzerland
| | - Juliette Simonin
- Faculty of Medicine, Department of Pediatrics, Gynecology & Obstetrics, University of Geneva, Geneva 1211, Switzerland; Faculty of Medicine, Department of Cell Physiology & Metabolism, University of Geneva, Geneva 1211, Switzerland
| | - Sylvain Lemeille
- Faculty of Medicine, Department of Pathology and Immunology, University of Geneva, Geneva 1211, Switzerland
| | - Bernhard Wehrle-Haller
- Faculty of Medicine, Department of Cell Physiology & Metabolism, University of Geneva, Geneva 1211, Switzerland
| | - Marc Chanson
- Faculty of Medicine, Department of Pediatrics, Gynecology & Obstetrics, University of Geneva, Geneva 1211, Switzerland; Faculty of Medicine, Department of Cell Physiology & Metabolism, University of Geneva, Geneva 1211, Switzerland.
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Girault A, Peretti M, Badaoui M, Hémon A, Morjani H, Ouadid-Ahidouch H. The N and C-termini of SPCA2 regulate differently Kv10.1 function: role in the collagen 1-induced breast cancer cell survival. Am J Cancer Res 2021; 11:251-263. [PMID: 33520372 PMCID: PMC7840723] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/01/2020] [Indexed: 06/12/2023] Open
Abstract
It's now clearly established that the tumor microenvironment participates to tumor development. Among the different actors contributing to these processes, ion channels, located at the cancer cell surface, play a major role. We recently demonstrated that the association of Kv10.1, Orai1 and SPCA2 is crucial to promote the collagen-induced survival of MCF-7 breast cancer cells. By using siRNA directed against SPCA2, we shown that this protein is involved in the regulation of the activity, the expression and the sub-cellular localization of Kv10.1. In addition, it has been demonstrated that SPCA2 is involved in SICE in MCF-7 cells and that the N- and the C-terminal parts of this protein are necessary to interact and to produce Ca2+ entry. However, no information is available about the necessary SPCA2's important region to regulate Kv10.1. The aim of our work is to evaluate how SPCA2 could interact with Kv10.1 channel to induce survival promotion. By using different SPCA2 mutants, we evaluate the role of the N- and C-terminal sections on the expression and the activity of Kv10.1 channels. In addition, we analyzed the impact of these deletions on the collagen 1-induced cell survival. Our results bring out new information about the regulation of Kv10.1 channel through SPCA2. More specifically how the N- and C-terminus of this Ca2+ transporter regulate Kv10.1 expression, trafficking, and function suggesting new opportunities to target Kv10.1 channels in cancer progression.
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Affiliation(s)
- Alban Girault
- Laboratory of Cellular and Molecular Physiology, UR UPJV 4667, University of Picardie Jules VerneAmiens, France
| | - Marta Peretti
- Laboratory of Cellular and Molecular Physiology, UR UPJV 4667, University of Picardie Jules VerneAmiens, France
| | - Mehdi Badaoui
- Laboratory of Cellular and Molecular Physiology, UR UPJV 4667, University of Picardie Jules VerneAmiens, France
- Department of Cell Physiology & Metabolism, University of Geneva, Faculty of MedicineGeneva, Switzerland
| | - Anaïs Hémon
- Laboratory of Cellular and Molecular Physiology, UR UPJV 4667, University of Picardie Jules VerneAmiens, France
| | - Hamid Morjani
- BioSpecT, EA7506, Faculty of Pharmacy, Reims UniversityReims, France
| | - Halima Ouadid-Ahidouch
- Laboratory of Cellular and Molecular Physiology, UR UPJV 4667, University of Picardie Jules VerneAmiens, France
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Badaoui M, Bouhadjar L, Kherroub DE, Chikh K, Seghier A, Belarbi EH. Green Copolymerization of Thiophene with para-Cholorobenzaldehyde Catalyzed by Maghnite-H+. Polym Sci Ser B 2020. [DOI: 10.1134/s156009042003001x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Peretti M, Badaoui M, Girault A, Van Gulick L, Mabille MP, Tebbakha R, Sevestre H, Morjani H, Ouadid-Ahidouch H. Original association of ion transporters mediates the ECM-induced breast cancer cell survival: Kv10.1-Orai1-SPCA2 partnership. Sci Rep 2019; 9:1175. [PMID: 30718673 PMCID: PMC6362254 DOI: 10.1038/s41598-018-37602-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 11/29/2018] [Indexed: 01/04/2023] Open
Abstract
In the last years it has been shown that many components of tumor microenvironment (TM) can induce cell signaling that permit to breast cancer cells (BC) to maintain their aggressiveness. Ion channels have a role in mediating TM signal; recently we have demonstrated a functional collaboration between Kv10.1 and Orai1 channels in mediating the pro-survival effect of collagen 1 on BC cells. Here we show how SPCA2 (Secretory Pathway Ca2+ ATPase) has a role in this process and is able to support survival and proliferation induced by collagen 1. By participating to an auto-sustaining loop, SPCA2 enhances membrane expression of Kv10.1 and Orai1; the activity of every component of this trio is necessary to mediate a store independent calcium entry (SICE). This SICE is fundamental to maintain both the activation of the pro-survival pathway and the membrane localization and consequently the activity of the two channels. Moreover, the three proteins and the collagen receptor DDR1 are overexpressed only in aggressive tumors tissues. In this work, we propose a novel association between SPCA2, Kv10.1 and Orai1 involved in mediating transduction signals from TM to the BC cells that can be potentially exploited in the search of novel therapeutic targets specific to tumor tissues.
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Affiliation(s)
- Marta Peretti
- Laboratory of Cellular and Molecular Physiology, EA4667, University of Picardie Jules Verne, Amiens, France
| | - Mehdi Badaoui
- Laboratory of Cellular and Molecular Physiology, EA4667, University of Picardie Jules Verne, Amiens, France
| | - Alban Girault
- Laboratory of Cellular and Molecular Physiology, EA4667, University of Picardie Jules Verne, Amiens, France
| | | | - Marie-Pierre Mabille
- Laboratory of Cellular and Molecular Physiology, EA4667, University of Picardie Jules Verne, Amiens, France.,Service d'Anatomie et Cytologie Pathologiques and Tumor Bank of Picardie, CHU d'Amiens, Université de Picardie Jules Verne, F-80000, Amiens, France
| | - Riad Tebbakha
- Laboratory of Cellular and Molecular Physiology, EA4667, University of Picardie Jules Verne, Amiens, France.,Service d'Anatomie et Cytologie Pathologiques and Tumor Bank of Picardie, CHU d'Amiens, Université de Picardie Jules Verne, F-80000, Amiens, France
| | - Henri Sevestre
- Laboratory of Cellular and Molecular Physiology, EA4667, University of Picardie Jules Verne, Amiens, France.,Service d'Anatomie et Cytologie Pathologiques and Tumor Bank of Picardie, CHU d'Amiens, Université de Picardie Jules Verne, F-80000, Amiens, France
| | - Hamid Morjani
- BioSpecT EA7506, Faculty of Pharmacy, Reims University, Reims, France
| | - Halima Ouadid-Ahidouch
- Laboratory of Cellular and Molecular Physiology, EA4667, University of Picardie Jules Verne, Amiens, France.
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Bassaid S, Ziane B, Badaoui M, Chaib M, Robert D. Effect of calcium oxalate on the photocatalytic degradation of Orange II on ZnO surface. Appl Nanosci 2013. [DOI: 10.1007/s13204-012-0108-6] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sekkach Y, Mekouar F, Jira M, Elqatni M, Elomri N, Fatihi J, Badaoui M, Hammi S, Smaali J, El Khattabi A, Amezyane T, Abouzahir A, Ghafir D. [Durable efficacity and remission after treatment with imatinib mesylate for FIP1L1-PDGFRA transcript negative associated eosinophilic cardiomyopathy]. Ann Pharm Fr 2011; 69:277-81. [PMID: 21924129 DOI: 10.1016/j.pharma.2011.07.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2011] [Revised: 07/28/2011] [Accepted: 07/29/2011] [Indexed: 11/29/2022]
Abstract
INTRODUCTION The cardiac involvement in hypereosinophilia remains a major cause of morbidity and mortality. Recent advances have identified new molecular mechanisms responsible for the expansion of the eosinophilic lineage, allowing a better classification of the different forms of Hypereosinophilic syndrome (HES) and especially targeted therapy. Since the discovery of the involvement of deregulated tyrosine kinases in the pathophysiology of these diseases, and particularly the identification of the fusion gene FIP1L1-PDGFRA, new molecules inhibiting specifically this signaling pathway (imatinib) were individualized, leading to dramatic therapeutic benefits in proliferative forms of HES considered before that of very poor prognosis. CASE REPORT We report here the dramatic effectiveness of imatinib used as second line therapy for dilated cardiomyopathy revealing a hypereosinophilic syndrome in a patient in whom the search for FIP1-L1-PDGFRA fusion gene was negative. CONCLUSION If hypereosinophilia has varied clinical and morphological outcome, its clinical consequences, particularly on heart function, are sometimes dreadful, and are not correlated either with blood eosinophil levels or with a specific etiology. We report here a case of HES lacking the FIP1-L1-PDGFRA fusion gene showing that despite the absence of this molecular defect, imatinib mesylate may have therapeutic interest in those cases of HES resistant to first line therapies.
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Affiliation(s)
- Y Sekkach
- Département de Médecine Interne-B, Hôpital Militaire D'instruction Med-V, Rabat, Maroc.
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Sekkach Y, Hammi S, Elqatni M, Fatihi J, Badaoui M, Elomri N, Mekouar F, Smaali J, Jira M, Amezyane T, Abouzahir A, Ghafir D. La colite ulcérative : une conséquence exceptionnelle après traitement par rituximab. Annales Pharmaceutiques Françaises 2011; 69:265-9. [PMID: 21924127 DOI: 10.1016/j.pharma.2011.06.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 06/13/2011] [Accepted: 06/22/2011] [Indexed: 10/18/2022]
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15
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Sekkach Y, Hammi S, Elqatni M, Fatihi J, Elomri N, Mekouar F, Badaoui M, Jira M, Smaali J, El Khattabi A, Amezyane T, Abouzahir A, Ghafir D. [Efficacity of rituximab in hemolytic anemia with cold autoantibodies case]. Ann Pharm Fr 2011; 69:205-8. [PMID: 21840439 DOI: 10.1016/j.pharma.2011.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 05/27/2011] [Accepted: 06/01/2011] [Indexed: 10/17/2022]
Abstract
INTRODUCTION Autoimmune hemolytic anemia with cold autoantibodies or cold agglutinin disease is a rare chronic disorder in which no treatment has, until now, evidence of its effectiveness. CLINICAL CASE We report a patient who successfully responded to rituximab for a cold agglutinin disease refractory to conventional therapy with very good tolerance and a complete remission. CONCLUSION There are only few observations that have been reported in the literature regarding the efficacity of rituximab in the treatment of cold agglutinin disease. This promising therapy could, in the future, constitute a real alternative.
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Affiliation(s)
- Y Sekkach
- Département de médecine interne B, hôpital militaire d'instruction, Med-V, Rabat, Maroc.
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Sekkach Y, Khattabi AE, Elqatni M, Fatihi J, Hammi S, Badaoui M, Mekouar F, Elomri N, Amezyane T, Abouzahir A, Ghafir D. Risques et pronostic des grossesses lupiques : à propos d’une série de 24 patientes. Rev Med Interne 2011. [DOI: 10.1016/j.revmed.2011.03.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sekkach Y, Fatihi J, Elqatni M, Badaoui M, Hammi S, Elomri N, Mekouar F, Amezyane T, Ghafir D, Ohayon V, Abouzahir A. Rémission précoce après une première perfusion de tocilizumab pour une maladie de Still réfractaire. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sekkach Y, Elqatni M, Mekouar F, Elomri N, Fatihi J, Badaoui M, Hammi S, Amezyane T, Abouzahir A, Ghafir D, Ohayon V. Intérêt du rituximab dans le syndrome de Felty : une efficacité hématologique prouvée. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Elqatni M, Sekkach Y, Hammi S, Elomri N, Fatihi J, Mekouar F, Badaoui M, Amezyane T, Abouzahir A, Ghafir D, Ohayon V. [Retropharyngeal abscess]. Rev Med Interne 2010; 32:319-20. [PMID: 20667628 DOI: 10.1016/j.revmed.2010.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Accepted: 06/22/2010] [Indexed: 10/19/2022]
Affiliation(s)
- M Elqatni
- Service de médecine interne B, hôpital militaire d'instruction Mohammed V, Rabat, Maroc.
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El Khattabi A, Seddik H, Fatihi J, Salaheddine H, Badaoui M, Amézyane T, Mahassine F, Ohayon V. [Acute recurrent hemolytic anemia as the first manifestation of Wilson's disease: Report of a case]. Transfus Clin Biol 2009; 16:39-42. [PMID: 19329346 DOI: 10.1016/j.tracli.2009.01.005] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2008] [Accepted: 01/09/2009] [Indexed: 12/19/2022]
Abstract
INTRODUCTION The liver and central nervous system are the usual targets of Wilson's disease, an inherited disorder of copper metabolism. Severe hemolytic anemia is an unusual complication of Wilson's disease. EXEGESIS We report a case of Wilson's disease revealed by acute intravascular repeating hemolytic anemia associated with liver failure. The initially negative etiologic investigation was directed by occurred of liver failure. The genetic study allowed to discover an other similar case. The evolution was favourable under treatment with zinc sulfate and penicillamine. DISCUSSION Diagnosis of Wilson's disease must be considered in case of acute hemolytic anemia associated with liver failure in young adults.
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Affiliation(s)
- A El Khattabi
- Service de médecine interne B, hôpital militaire d'instruction Mohammed-V, Madinat Al Irfane, Hay Riad, BP 6255, Rabat, Maroc.
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Badaoui M, Sari-Zizi NB, Graner G, Mkadmi EB, Bürger H, Pracna P. High-Resolution Spectrum and Rovibrational Analysis of the nu(2)/nu(5) Dyad of D(3)SiF near 700 cm(-1). J Mol Spectrosc 2000; 200:72-88. [PMID: 10662578 DOI: 10.1006/jmsp.1999.8021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The nu(2) (A(1), 710.157 cm(-1)) and nu(5) (E, 701.717 cm(-1)) fundamental bands of D(3)(28)SiF have been studied by FTIR spectroscopy with a resolution of 2.4 x 10(-3) cm(-1). We assigned 1648 lines for the parallel band (J(max) = 50, K(max) = 21), 4279 for the perpendicular band (J(max) = 52, K(max) = 27), and in addition 671 perturbation-allowed transitions (J(max) = 50, K(max) = 12). The nearly degenerate v(2) = 1 and v(5) = 1 states are linked by (DeltaK = +/-1, Deltal = +/-1) and (DeltaK = +/-2, Deltal = -/+1) interactions, while the l(5) = +/-1 levels of nu(5) interact also by l(2, -1), l(2, 2), and l(2, -4) interactions. The first model with 36 free parameters, taking into account all these resonances through a nonlinear least-squares program, gave standard deviations of 1.56 x 10(-4) cm(-1) for 5997 nonzero-weighted IR data and 138 kHz for 8 MW data from the literature. The second model, in which the main Coriolis term was constrained to a force field value, used 37 parameters and gave similar standard deviations. A new determination of the A(0) and D(0)(K) ground state parameters was performed by two methods: either using differences between "forbidden" transitions differing by 3 in K or letting A(0) and D(0)(K) free in the global fit. The values obtained are fully compatible with those obtained previously by the "loop method." Copyright 2000 Academic Press.
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Affiliation(s)
- M Badaoui
- Laboratoire de Spectronomie Physique Appliquée, Faculté des Sciences, Université Mohammed V, B.P. 1014, Rabat-Agdal, Morocco
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