Academic literature on the topic 'Anionophore transmembrane transport'

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Journal articles on the topic "Anionophore transmembrane transport"

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Bickerton, Laura E., Alistair J. Sterling, Paul D. Beer, Fernanda Duarte, and Matthew J. Langton. "Transmembrane anion transport mediated by halogen bonding and hydrogen bonding triazole anionophores." Chemical Science 11, no. 18 (2020): 4722–29. http://dx.doi.org/10.1039/d0sc01467b.

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Akhtar, Nasim, Abhishek Saha, Vishnu Kumar, Nirmalya Pradhan, Subhankar Panda, Sudhir Morla, Sachin Kumar, and Debasis Manna. "Diphenylethylenediamine-Based Potent Anionophores: Transmembrane Chloride Ion Transport and Apoptosis Inducing Activities." ACS Applied Materials & Interfaces 10, no. 40 (September 17, 2018): 33803–13. http://dx.doi.org/10.1021/acsami.8b06664.

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Berry, Stuart N., Vanessa Soto-Cerrato, Ethan N. W. Howe, Harriet J. Clarke, Ishna Mistry, Ali Tavassoli, Young-Tae Chang, Ricardo Pérez-Tomás, and Philip A. Gale. "Fluorescent transmembrane anion transporters: shedding light on anionophoric activity in cells." Chemical Science 7, no. 8 (2016): 5069–77. http://dx.doi.org/10.1039/c6sc01643j.

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Gianotti, Ambra, Valeria Capurro, Livia Delpiano, Marcin Mielczarek, María García-Valverde, Israel Carreira-Barral, Alessandra Ludovico, et al. "Small Molecule Anion Carriers Correct Abnormal Airway Surface Liquid Properties in Cystic Fibrosis Airway Epithelia." International Journal of Molecular Sciences 21, no. 4 (February 21, 2020): 1488. http://dx.doi.org/10.3390/ijms21041488.

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Cystic fibrosis (CF) is a genetic disease characterized by the lack of cystic fibrosis transmembrane conductance regulator (CFTR) protein expressed in epithelial cells. The resulting defective chloride and bicarbonate secretion and imbalance of the transepithelial homeostasis lead to abnormal airway surface liquid (ASL) composition and properties. The reduced ASL volume impairs ciliary beating with the consequent accumulation of sticky mucus. This situation prevents the normal mucociliary clearance, favouring the survival and proliferation of bacteria and contributing to the genesis of CF lung disease. Here, we have explored the potential of small molecules capable of facilitating the transmembrane transport of chloride and bicarbonate in order to replace the defective transport activity elicited by CFTR in CF airway epithelia. Primary human bronchial epithelial cells obtained from CF and non-CF patients were differentiated into a mucociliated epithelia in order to assess the effects of our compounds on some key properties of ASL. The treatment of these functional models with non-toxic doses of the synthetic anionophores improved the periciliary fluid composition, reducing the fluid re-absorption, correcting the ASL pH and reducing the viscosity of the mucus, thus representing promising drug candidates for CF therapy.
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Dissertations / Theses on the topic "Anionophore transmembrane transport"

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Elie, Claude-Rosny. "Propriétés anionophores et antibactériennes de sels d’imidazolium et benzimidazolium." Thèse, 2016. http://hdl.handle.net/1866/18433.

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L’éclosion de bactéries résistantes aux antibiotiques constitue un problème sérieux auquel fait face notre système de santé. L’une des stratégies récemment proposées afin de s’attaquer efficacement et irréversiblement à ces microorganismes multi-résistants est de cibler directement leur membrane via l’action de molécules induisant un débalancement électrolytique de part et d’autre de cette dernière. Parallèlement, ces mêmes agents peuvent aussi avoir des applications dans le traitement de maladies originant des dysfonctions du transport ionique, comme la fibrose kystique. À cet égard, nous présentons dans cette thèse différents sels d’imidazolium et benzimidazolium N,N-disubstitués possédant un potentiel à la fois antimicrobien et ionophore. Notre approche se résume d’abord en un volet mécanistique où une série de modifications structurelles ont été apportées à des sels d’imidazolium et benzimidazolium afin d’observer comment ces changements modulent l’efficacité du transport d’anions dans la membrane artificielle d’un liposome. Nous avons à ce titre pu conclure que l’espèce formée de deux bras aromatiques phényléthynylbenzyl, disposées symétriquement de part et d’autre d’un cation imidazolium, induisait le meilleur transport des anions chlorures, au travers d’une membrane de liposomes, à des concentrations de l’ordre du micromolaire. En outre, les monocations imidazolium et benzimidazolium flanqués d’un contre-anion bis(trifluorométhylsulfonyl)amide ont conduit à une activité ionophore plus rapide. Qui plus est, en s’appuyant sur ces résultats, nous avons présenté le premier exemple, à notre connaissance, d’un transporteur d’anions et de cations, contenant le cation benzimidazolium et capable d’agir aussi bien dans des liposomes que dans des bactéries. Dans un second temps, les meilleurs agents ionophores ont été étudiés dans les membranes plus complexes des bactéries et des globules rouges humains pour vérifier leur effet bactéricide et leur innocuité. Le design de nos transporteurs formés d’un espaceur luthidine a ainsi permis d’obtenir un agent antimicrobien efficace dans des bactéries gram positives et négatives (B. thuringiensis et E. coli) avec une toxicité limitée de l’ordre de 10% sur les globules rouges humains à ses concentrations bactéricides.
The emergence of antibiotic resistant bacteria is a serious problem that our health system faces. One recently proposed strategy to effectively and irreversibly kill these multi-resistant microorganisms is to directly target the integrity of their membrane, using small molecules able to induce an electrolyte imbalance. Moreover, the same molecules may find applications in the treatement od diseases originating from the dysfunction of ion transport, such as cystic fibrosis. Herein we present different imidazolium and benzimidazolium salts N,N-disubstituted with both antimicrobial and ionophoric potential. We first performed mechanistic studies where different structural changes have been made to the imidazolium and benzimidazolium salts to observe how these modifications modulate the efficiency of the anion transport in artificial membrane liposomes. We were able to conclude that the species formed of two aromatic arms phenylethynylbenzyl arranged symmetrically on either side of an imidazolium cation, induced a better transport of chloride anions, through a membrane of liposomes at the micromolar range. In addition, monocations imidazolium and benzimidazolium flanked with an bis(trifluorométhylsulfonyl)amide anion led to faster ionophore activity. Moreover, based on these results we presented the first example, to our knowledge, for an anions and cations benzimidazolium-based transporter, acting as well in liposomes as in bacteria. Secondly, the best anionophore agents were analyzed in more complex bacterias and human red blood cells membranes to study their bactericidal potential and innocuity. Among all the benzimidazolium salts studied, we identified one compound, which presents interesting antibacterial properties as a result of its ability to induce an electrolytic imbalance and to disrupt the integrity and the potential of the bacterial membranes. At the same time this antibacterial agent presented a low toxicity to human cells in bacteriostatic range concentrations.
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