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Frederiksen RF, Slettemeås JS, Granstad S, Lagesen K, Pikkemaat MG, Urdahl AM, Simm R. Polyether ionophore resistance in a one health perspective. Front Microbiol 2024; 15:1347490. [PMID: 38351920 PMCID: PMC10863045 DOI: 10.3389/fmicb.2024.1347490] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 01/09/2024] [Indexed: 02/16/2024] Open
Abstract
Antimicrobial resistance is a major threat to human health and must be approached from a One Health perspective. Use of antimicrobials in animal husbandry can lead to dissemination and persistence of resistance in human pathogens. Polyether ionophores (PIs) have antimicrobial activities and are among the most extensively used feed additives for major production animals. Recent discoveries of genetically encoded PI resistance mechanisms and co-localization of resistance mechanisms against PIs and antimicrobials used in human medicine on transferrable plasmids, have raised concerns that use of PIs as feed additives bear potential risks for human health. This review summarizes the current knowledge on PI resistance and discusses the potential consequences of PI-usage as feed additives in a One Health perspective.
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Affiliation(s)
| | - Jannice Schau Slettemeås
- Department of Animal Health, Welfare and Food Safety, Norwegian Veterinary Institute, Ås, Norway
| | - Silje Granstad
- Department of Animal Health, Welfare and Food Safety, Norwegian Veterinary Institute, Ås, Norway
| | - Karin Lagesen
- Department of Animal Health, Welfare and Food Safety, Norwegian Veterinary Institute, Ås, Norway
| | - Mariel G. Pikkemaat
- Wageningen Food Safety Research, Wageningen University and Research, Wageningen, Netherlands
| | - Anne Margrete Urdahl
- Department of Animal Health, Welfare and Food Safety, Norwegian Veterinary Institute, Ås, Norway
| | - Roger Simm
- Department of Biosciences, University of Oslo, Oslo, Norway
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2
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Rozario P, Pinilla M, Gorse L, Vind AC, Robinson KS, Toh GA, Firdaus MJ, Martínez JF, Kerk SK, Lin Z, Chambers JC, Bekker-Jensen S, Meunier E, Zhong F. Mechanistic basis for potassium efflux-driven activation of the human NLRP1 inflammasome. Proc Natl Acad Sci U S A 2024; 121:e2309579121. [PMID: 38175865 PMCID: PMC10786283 DOI: 10.1073/pnas.2309579121] [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: 06/07/2023] [Accepted: 11/15/2023] [Indexed: 01/06/2024] Open
Abstract
Nigericin, an ionophore derived from Streptomyces hygroscopicus, is arguably the most commonly used tool compound to study the NLRP3 inflammasome. Recent findings, however, showed that nigericin also activates the NLRP1 inflammasome in human keratinocytes. In this study, we resolve the mechanistic basis of nigericin-driven NLRP1 inflammasome activation. In multiple nonhematopoietic cell types, nigericin rapidly and specifically inhibits the elongation stage of the ribosome cycle by depleting cytosolic potassium ions. This activates the ribotoxic stress response (RSR) sensor kinase ZAKα, p38, and JNK, as well as the hyperphosphorylation of the NLRP1 linker domain. As a result, nigericin-induced pyroptosis in human keratinocytes is blocked by extracellular potassium supplementation, ZAKα knockout, or pharmacologic inhibitors of ZAKα and p38 kinase activities. By surveying a panel of ionophores, we show that electroneutrality of ion movement is essential to activate ZAKα-driven RSR and a greater extent of K+ depletion is necessary to activate ZAKα-NLRP1 than NLRP3. These findings resolve the mechanism by which nigericin activates NLRP1 in nonhematopoietic cell types and demonstrate an unexpected connection between RSR, perturbations of potassium ion flux, and innate immunity.
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Affiliation(s)
- Pritisha Rozario
- Lee Kong Chian School of Medicine, Nanyang Technological University, 308232, Singapore
| | - Miriam Pinilla
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse31077, France
| | - Leana Gorse
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse31077, France
| | - Anna Constance Vind
- Center for Healthy Aging, University of Copenhagen, Copenhagen2200, Denmark
- Center for Gene Expression, Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen2200, Denmark
| | - Kim S. Robinson
- Agency for Science, Technology and Research (A*STAR) Skin Research Labs, 138648, Singapore
- Skin Research Institute of Singapore, 308232, Singapore
| | - Gee Ann Toh
- Lee Kong Chian School of Medicine, Nanyang Technological University, 308232, Singapore
| | | | - José Francisco Martínez
- Center for Healthy Aging, University of Copenhagen, Copenhagen2200, Denmark
- Center for Gene Expression, Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen2200, Denmark
| | - Swat Kim Kerk
- Population and Global Health Program, Lee Kong Chian School of Medicine, Nanyang Technological University, 308232, Singapore
| | - Zhewang Lin
- Department of Biological Sciences, National University of Singapore, 117543, Singapore
| | - John C. Chambers
- Population and Global Health Program, Lee Kong Chian School of Medicine, Nanyang Technological University, 308232, Singapore
| | - Simon Bekker-Jensen
- Center for Healthy Aging, University of Copenhagen, Copenhagen2200, Denmark
- Center for Gene Expression, Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen2200, Denmark
| | - Etienne Meunier
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse31077, France
| | - Franklin Zhong
- Lee Kong Chian School of Medicine, Nanyang Technological University, 308232, Singapore
- Skin Research Institute of Singapore, 308232, Singapore
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3
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Zlotnikov ID, Krylov SS, Semenova MN, Semenov VV, Kudryashova EV. Triphenylphosphine Derivatives of Allylbenzenes Express Antitumor and Adjuvant Activity When Solubilized with Cyclodextrin-Based Formulations. Pharmaceuticals (Basel) 2023; 16:1651. [PMID: 38139778 PMCID: PMC10747112 DOI: 10.3390/ph16121651] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/17/2023] [Accepted: 11/21/2023] [Indexed: 12/24/2023] Open
Abstract
Allylbenzenes (apiol, dillapiol, myristicin and allyltetramethoxybenzene) are individual components of plant essential oils that demonstrate antitumor activity and can enhance the antitumor activity of cytotoxic drugs, such as paclitaxel, doxorubicin, cisplatin, etc. Triphenylphosphine (PPh3) derivatives of allylbenzenes are two to three orders of magnitude more potent than original allylbenzenes in terms of IC50. The inhibition of efflux pumps has been reported for allylbenzenes, and the PPh3 moiety is deemed to be responsible for preferential mitochondrial accumulation and the depolarization of mitochondrial membranes. However, due to poor solubility, the practical use of these substances has never been an option. Here, we show that this problem can be solved by using a complex formation with cyclodextrin (CD-based molecular containers) and polyanionic heparin, stabilizing the positive charge of the PPh3 cation. Such containers can solubilize both allylbenzenes and their PPh3 derivatives up to 0.4 mM concentration. Furthermore, we have observed that solubilized PPh3 derivatives indeed work as adjuvants, increasing the antitumor activity of paclitaxel against adenocarcinomic human alveolar basal epithelial cells (A549) by an order of magnitude (in terms of IC50) in addition to being quite powerful cytostatics themselves (IC50 in the range 1-10 µM). Even more importantly, CD-solubilized PPh3 derivatives show pronounced selectivity, being highly toxic for the A549 tumor cell line and minimally toxic for HEK293T non-tumor cells, red blood cells and sea urchin embryos. Indeed, in many cancers, the mitochondrial membrane is more prone to depolarization compared to normal cells, which probably explains the observed selectivity of our compounds, since PPh3 derivatives are known to act as mitochondria-targeting agents. According to the MTT test, 100 µM solution of PPh3 derivatives of allylbenzenes causes the death of up to 85% of A549 cancer cells, while for HEK293T non-cancer cells, only 15-20% of the cells died. The hemolytic index of the studied substances did not exceed 1%, and the thrombogenicity index was < 1.5%. Thus, this study outlines the experimental foundation for developing combined cytostatic medications, where effectiveness and selectivity are achieved through decreased concentration of the primary ingredient and the inclusion of adjuvants, which are safe or practically harmless substances.
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Affiliation(s)
- Igor D. Zlotnikov
- Faculty of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991 Moscow, Russia;
| | - Sergey S. Krylov
- N. D. Zelinsky Institute of Organic Chemistry RAS, 47 Leninsky Prospect, 119991 Moscow, Russia
| | - Marina N. Semenova
- N. K. Koltzov Institute of Developmental Biology RAS, 26 Vavilov Street, 119334 Moscow, Russia
| | - Victor V. Semenov
- N. D. Zelinsky Institute of Organic Chemistry RAS, 47 Leninsky Prospect, 119991 Moscow, Russia
| | - Elena V. Kudryashova
- Faculty of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991 Moscow, Russia;
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Felici M, Tugnoli B, Ghiselli F, Baldo D, Ratti C, Piva A, Grilli E. Investigating the effects of essential oils and pure botanical compounds against Eimeria tenella in vitro. Poult Sci 2023; 102:102898. [PMID: 37573847 PMCID: PMC10448326 DOI: 10.1016/j.psj.2023.102898] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/18/2023] [Accepted: 06/24/2023] [Indexed: 08/15/2023] Open
Abstract
Essential oils (EO) and natural bioactive compounds are well-known antibacterial and anti-inflammatory factors; however, little is known about their anticoccidial activity and mode of action. EO deriving from basil (BEO), garlic (GAR), oregano (OEO), thyme (TEO), and their main bioactive compounds were investigated for their anticoccidial proprieties and compared to salinomycin (SAL) and amprolium (AMP) in vitro. The invasion of Eimeria tenella sporozoites was studied on 2 cell models: Madin-Darby Bovine Kidney (MDBK) cells and primary chicken epithelial cells (cIEC). Invasion efficiency was evaluated at 2 and 24 h postinfection (hpi) with counts of extracellular sporozoites and by detection of intracellular E. tenella DNA by PCR. Results show that at both timepoints, the EO were most effective in preventing the invasion of E. tenella with an average reduction of invasion at 24 hpi by 36% in cIEC and 55% in MDBK. The study also examined cytokine gene expression in cIEC at 24 hpi and found that AMP, BEO, OEO, TEO, carvacrol (CAR), and thymol (THY) significantly reduced interleukin (IL)8 expression, with CAR also reducing expression of IL1β and IL6 compared to the infected control. In addition, this work investigated the morphology of E. tenella sporozoites treated with anticoccidial drugs and EO using a scanning electron microscope. All the treatments induced morphological anomalies, characterized by a reduction of area, perimeter and length of sporozoites. SAL had a significant impact on altering sporozoite shape only at 24 h, whereas CAR and THY significantly compromised the morphology already at 2 hpi, compared to the untreated control. OEO and GAR showed the most significant alterations among all the treatments. The findings of this study highlight the potential of EO as an alternative to traditional anticoccidial drugs in controlling E. tenella invasion and in modulating primary immune response.
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Affiliation(s)
| | | | | | - David Baldo
- DISTAL, University of Bologna, Bologna, Italy
| | | | - Andrea Piva
- DIMEVET, University of Bologna, Bologna, Italy; Vetagro S.p.A., Reggio Emilia, Italy
| | - Ester Grilli
- DIMEVET, University of Bologna, Bologna, Italy; Vetagro Inc., Chicago, IL 60603, USA.
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5
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Marjanović M, Mikecin Dražić AM, Mioč M, Paradžik M, Kliček F, Novokmet M, Lauc G, Kralj M. Salinomycin disturbs Golgi function and specifically affects cells in epithelial-to-mesenchymal transition. J Cell Sci 2023; 136:jcs260934. [PMID: 37545292 DOI: 10.1242/jcs.260934] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 07/31/2023] [Indexed: 08/08/2023] Open
Abstract
Epithelial-to-mesenchymal transition (EMT) gives rise to cells with properties similar to cancer stem cells (CSCs). Targeting the EMT program to selectively eliminate CSCs is a promising way to improve cancer therapy. Salinomycin (Sal), a K+/H+ ionophore, was identified as highly selective towards CSC-like cells, but its mechanism of action and selectivity remains elusive. Here, we show that Sal, similar to monensin and nigericin, disturbs the function of the Golgi. Sal alters the expression of Golgi-related genes and leads to marked changes in Golgi morphology, particularly in cells that have undergone EMT. Moreover, Golgi-disturbing agents severely affect post-translational modifications of proteins, including protein processing, glycosylation and secretion. We discover that the alterations induced by Golgi-disturbing agents specifically affect the viability of EMT cells. Collectively, our work reveals a novel vulnerability related to the EMT, suggesting an important role for the Golgi in the EMT and that targeting the Golgi could represent a novel therapeutic approach against CSCs.
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Affiliation(s)
- Marko Marjanović
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
| | - Ana-Matea Mikecin Dražić
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
| | - Marija Mioč
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
| | - Mladen Paradžik
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
| | - Filip Kliček
- GENOS, Glycoscience Research Laboratory, Borongajska c. 83, 10000 Zagreb, Croatia
| | - Mislav Novokmet
- GENOS, Glycoscience Research Laboratory, Borongajska c. 83, 10000 Zagreb, Croatia
| | - Gordan Lauc
- GENOS, Glycoscience Research Laboratory, Borongajska c. 83, 10000 Zagreb, Croatia
| | - Marijeta Kralj
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
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6
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Gurukkalot K, Rajendran V. Repurposing Polyether Ionophores as a New-Class of Anti-SARS-Cov-2 Agents as Adjunct Therapy. Curr Microbiol 2023; 80:273. [PMID: 37414909 DOI: 10.1007/s00284-023-03366-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 06/05/2023] [Indexed: 07/08/2023]
Abstract
The emergence of SARS-CoV-2 and its variants have posed a significant threat to humankind in tackling the viral spread. Furthermore, currently repurposed drugs and frontline antiviral agents have failed to cure severe ongoing infections effectively. This insufficiency has fuelled research for potent and safe therapeutic agents to treat COVID-19. Nonetheless, various vaccine candidates have displayed a differential efficacy and need for repetitive dosing. The FDA-approved polyether ionophore veterinary antibiotic for treating coccidiosis has been repurposed for treating SARS-CoV-2 infection (as shown by both in vitro and in vivo studies) and other deadly human viruses. Based on selectivity index values, ionophores display therapeutic effects at sub-nanomolar concentrations and exhibit selective killing ability. They act on different viral targets (structural and non-structural proteins), host-cell components leading to SARS-CoV-2 inhibition, and their activity is further enhanced by Zn2+ supplementation. This review summarizes the anti-SARS-CoV-2 potential and molecular viral targets of selective ionophores like monensin, salinomycin, maduramicin, CP-80,219, nanchangmycin, narasin, X-206 and valinomycin. Ionophore combinations with Zn2+ are a new therapeutic strategy that warrants further investigation for possible human benefits.
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Affiliation(s)
- Keerthana Gurukkalot
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, 605014, India
| | - Vinoth Rajendran
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, 605014, India.
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7
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Watson DJ, Wiesner L, Matimela T, Beukes D, Meyers PR. Tandem LC-MS Identification of Antitubercular Compounds in Zones of Growth Inhibition Produced by South African Filamentous Actinobacteria. Molecules 2023; 28:molecules28114276. [PMID: 37298751 DOI: 10.3390/molecules28114276] [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: 02/27/2023] [Revised: 04/20/2023] [Accepted: 05/19/2023] [Indexed: 06/12/2023] Open
Abstract
Novel antitubercular compounds are urgently needed to combat drug-resistant Mycobacterium tuberculosis (Mtb). Filamentous actinobacteria have historically been an excellent source of antitubercular drugs. Despite this, drug discovery from these microorganisms has fallen out of favour due to the continual rediscovery of known compounds. To increase the chance of discovering novel antibiotics, biodiverse and rare strains should be prioritised. Subsequently, active samples need to be dereplicated as early as possible to focus efforts on truly novel compounds. In this study, 42 South African filamentous actinobacteria were screened for antimycobacterial activity using the agar overlay method against the Mtb indicator Mycolicibacterium aurum under six different nutrient growth conditions. Known compounds were subsequently identified through extraction and high-resolution mass spectrometric analysis of the zones of growth inhibition produced by active strains. This allowed the dereplication of 15 hits from six strains that were found to be producing puromycin, actinomycin D and valinomycin. The remaining active strains were grown in liquid cultures, extracted and submitted for screening against Mtb in vitro. Actinomadura napierensis B60T was the most active sample and was selected for bioassay-guided purification. This resulted in the identification of tetromadurin, a known compound, but which we show for the first time to have potent antitubercular activity, with the MIC90s within the range of 73.7-151.6 nM against M. tuberculosis H37RvTin vitro under different test conditions. This shows that South African actinobacteria are a good source of novel antitubercular compounds and warrant further screening. It is also revealed that active hits can be dereplicated by HPLC-MS/MS analysis of the zones of growth inhibition produced by the agar overlay technique.
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Affiliation(s)
- Daniel J Watson
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town 7700, South Africa
| | - Lubbe Wiesner
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town 7700, South Africa
| | - Tlhalefo Matimela
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town 7700, South Africa
| | - Denzil Beukes
- School of Pharmacy, University of the Western Cape, Bellville 7535, South Africa
| | - Paul R Meyers
- Department of Molecular and Cell Biology, University of Cape Town, Cape Town 7700, South Africa
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8
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Bartz FM, Beirow K, Wurm K, Baecker D, Link A, Bednarski PJ. A graphite furnace-atomic absorption spectrometry-based rubidium efflux assay for screening activators of the K v 7.2/3 channel. Arch Pharm (Weinheim) 2023; 356:e2200585. [PMID: 36748851 DOI: 10.1002/ardp.202200585] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 11/04/2022] [Revised: 12/21/2022] [Accepted: 01/18/2023] [Indexed: 02/08/2023]
Abstract
For the characterization of Kv 7.2/3 channel activators, several analytical methods are available that vary in effort and cost. In addition to the technically elaborate patch-clamp method, which serves as a reference method, there exist several medium to high-throughput screening methods including a rubidium efflux flame-atomic absorption spectrometry (F-AAS) assay and a commercial thallium uptake fluorescence-based assay. In this study, the general suitability of a graphite furnace atomic absorption spectrometry (GF-AAS)-based rubidium efflux assay as a screening method for Kv 7.2/3 channel activators was demonstrated. With flupirtine serving as a reference compound, 16 newly synthesizedcompounds and the known Kv 7.2/3 activator retigabine were first classified as either active or inactive by using the GF-AAS-based rubidium (Rb) efflux assay. Then, the results were compared with a thallium (Tl) uptake fluorescence-based fluorometric imaging plate reader (FLIPR) potassium assay. Overall, 16 of 17 compounds were classified by the GF-AAS-based assay in agreement with their channel-activating properties determined by the more expensive Tl uptake, fluorescence-based assay. Thus, the performance of the GF-AAS-based Rb assay for primary drug screening of Kv 7.2/3-activating compounds was clearly demonstrated, as documented by the calculated Z'-factor of the GF-AAS-based method. Moreover, method development included optimization of the coating of the microtiter plates and the washing procedure, which extended the range of this assay to poorly adherent cells such as the HEK293 cells used in this study.
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Affiliation(s)
- Frieda-Marie Bartz
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
| | - Kristin Beirow
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
| | - Konrad Wurm
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
| | - Daniel Baecker
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
| | - Andreas Link
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
| | - Patrick J Bednarski
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, University of Greifswald, Greifswald, Germany
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9
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Tian L, Li X, Lai H, Sun T, Li X, Wu L, Wu C, Yao S, Ren Y, He S, Yang G. SLC11A2: a promising biomarker and therapeutic target in ovarian cancer. Sci Rep 2023; 13:1132. [PMID: 36670142 PMCID: PMC9860018 DOI: 10.1038/s41598-022-26789-5] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 12/20/2022] [Indexed: 01/22/2023] Open
Abstract
Ovarian cancer has the highest mortality rate among gynecologic tumors, with a 5-year survival rate of less than 25%. There is an urgent need for early diagnosis and new drugs to reduce the disease burden of ovarian cancer. The aim of this study was to investigate the effectiveness of SLC11A2 as a therapeutic target and marker for ovarian cancer. Expression data of SLC11A2 were obtained from public databases. Then, the biological functions of SLC11A2 were validated in four ovarian cancer cell lines. Finally, we collected ovarian cancer clinical tissues, serum, and plasma exosomes and used immunohistochemistry, Elisa, and liquid chromatography-mass spectrometry (LC-MS) to validate the test efficacy of SLC11A2. The results showed that ovarian cancers with high SLC11A2 mRNA expression had shorter 5-year PFS and MST. Knockdown of SLC11A2 reduced ovarian cancer migration and increased cisplatin-induced apoptosis. Serum SLC11A2 may help improve the detection rate of ovarian cancer.
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Affiliation(s)
- Liming Tian
- Department of Gynecology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan Road II, Guangzhou, 510080, China
- Department of Gynecology, Qilu Hospital of Shandong University (Qingdao), Jinan, China
| | - Xuemei Li
- Department of Laboratory Medicine, The First Affiliated Hospital of Xiamen University, Xiamen Key Laboratory of Genetic Testing, School of Medicine, Xiamen University, Xiamen, 361005, China
| | - Huiling Lai
- Department of Gynecology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan Road II, Guangzhou, 510080, China
- Department of Gynecology, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Tingting Sun
- Department of Gynecology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan Road II, Guangzhou, 510080, China
| | - Xiaohui Li
- Department of Gynecology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan Road II, Guangzhou, 510080, China
| | - Linxiang Wu
- Department of Gynecology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan Road II, Guangzhou, 510080, China
| | - Chuling Wu
- Department of Gynecology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan Road II, Guangzhou, 510080, China
| | - Shuzhong Yao
- Department of Gynecology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan Road II, Guangzhou, 510080, China
| | - Yufeng Ren
- Department of Radiotherapy, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Shasha He
- Department of Radiotherapy, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China.
| | - Guofen Yang
- Department of Gynecology, The First Affiliated Hospital, Sun Yat-Sen University, No. 58, Zhongshan Road II, Guangzhou, 510080, China.
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10
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Ekinci İB, Chłodowska A, Olejnik M. Ionophore Toxicity in Animals: A Review of Clinical and Molecular Aspects. Int J Mol Sci 2023; 24:1696. [PMID: 36675211 DOI: 10.3390/ijms24021696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023] Open
Abstract
For many years, ionophores have been used to control coccidiosis in poultry. However, misuse of ionophores can cause toxicity with significant clinical symptoms. The most critical factors influencing ionophores' toxicity are administration dose, species, and animal age. Although clinical signs of ionophore intoxication are well studied, the toxicity mechanisms of the ionophores at the molecular level still are not fully elucidated. This review summarizes the studies focused on polyether ionophores toxicity mechanisms in animals at the clinical and molecular levels. Studies show that ionophore toxicity mainly affects myocardial and skeletal muscle cells. The molecular mechanism of the toxication could be explained by the inhibition of oxidative phosphorylation via dysregulation of ion concentration. Tiamulin-ionophore interaction and the synergetic effect of tiamulin in ionophore biotransformation are discussed. Furthermore, in recent years ionophores were candidates for reprofiling as antibacterial and anti-cancer drugs. Identifying ionophores' toxicity mechanisms at the cellular level will likely help develop novel therapies in veterinary and human medicine.
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11
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Guo D, Dai X, Liu K, Liu Y, Wu J, Wang K, Jiang S, Sun F, Wang L, Guo B, Yang D, Huang L. A Self-Reinforcing Nanoplatform for Highly Effective Synergistic Targeted Combinatary Calcium-Overload and Photodynamic Therapy of Cancer. Adv Healthc Mater 2023; 12:e2202424. [PMID: 36640265 DOI: 10.1002/adhm.202202424] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [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: 09/23/2022] [Revised: 12/26/2022] [Indexed: 01/15/2023]
Abstract
While calcium-overload-mediated therapy (COMT) is a promising but largely untapped therapeutic strategy, combinatory therapy greatly boosts treatment outcomes with integrated merits of different therapies. Herein, a BPQD@CaO2 -PEG-GPC3Ab nanoplatform is formulated by integrating calcium peroxide (CaO2 ) and black phosphorus quantum dot (BPQD, photosensitizer) with active-targeting glypican-3 antibody (GPC3Ab), for combinatory photodynamic therapy (PDT) and COMT in response to acidic pH and near-infrared (NIR) light, wherein CaO2 serves as the reservoir of calcium ions (Ca2+ ) and hydrogen peroxide (H2 O2 ). Navigated by GPC3Ab to tumor cells at acidic pH, the nanoparticle disassembles to CaO2 and BPQD; CaO2 produces COMT Ca2+ and H2 O2 , while H2 O2 makes oxygen (O2 ) to promote PDT; under NIR irradiation BPQD facilitates not only the conversion of O2 to singlet oxygen (1 O2 ) for PDT, but also moderate hyperthermia to accelerate NP dissociation to CaO2 and BPQD, and conversions of CaO2 to Ca2+ and H2 O2 , and H2 O2 to O2 , to enhance both COMT and PDT. After supplementary ionomycin treatment to induce intracellular Ca2+ bursts, the multimodal therapeutics strikingly induce hepatocellular carcinoma apoptosis, likely through the activation of the calpains and caspases 12, 9, and 3, up-regulation of Bax and down-regulation of Bcl-2 proteins. This nanoplatform enables a mutually-amplifying and self-reinforcing synergistic therapy.
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Affiliation(s)
- Dongdong Guo
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China.,Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Xiaoyong Dai
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China
| | - Kewei Liu
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China
| | - Yuhong Liu
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China.,Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Jiamin Wu
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China
| | - Kun Wang
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China
| | - Shengwei Jiang
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China
| | - Fen Sun
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China
| | - Lijun Wang
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China
| | - Bing Guo
- School of Science, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, Harbin Institute of Technology, Shenzhen, 518055, China
| | - Dongye Yang
- Division of Gastroenterology and Hepatology, the University of Hong Kong-Shenzhen Hospital, Shenzhen, Guangdong, 518053, China
| | - Laiqiang Huang
- Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotechnology and Biomedicine, State Key Laboratory of Health Sciences and Technology, State Key Laboratory of Chemical Oncogenomics, Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, China.,Department of Chemistry, Tsinghua University, Beijing, 100084, China
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12
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Hirata K, Sato E, Lisy JM, Ishiuchi SI, Fujii M. Cation-responsive cavity expansion of valinomycin revealed by cryogenic ion trap infrared spectroscopy. Phys Chem Chem Phys 2023; 25:1075-1080. [PMID: 36519454 DOI: 10.1039/d2cp04570b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Valinomycin (VM) is a natural K+-selective ionophore that transports K+ through the cell membrane. VM captures K+ in its central cavity with a C3-symmetric β-turn-like backbone. Although the binding affinity is drastically decreased for the VM-sodium (Na+VM) complex with respect to K+VM, VM holds relatively high affinity to Rb+ and Cs+. The high affinity for larger ions irrespective of ionic size seems to conflict with the expected optimal size matching model and raises questions on what factors determine ion selectivity. A combination of infrared spectroscopy with supporting computational calculations reveals that VM can accommodate larger Rb+ and Cs+ by flexibly changing its cavity size with the elongation of its folded β-turn-like backbone. The high affinity to Rb+ and Cs+ can be ascribed to a size-dependent cavity expansion. These findings provide a new perspective on molecular recognition and selectivity beyond the conventional size matching model.
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Affiliation(s)
- Keisuke Hirata
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Eiko Sato
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan
| | - James M Lisy
- International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.,Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Shun-Ichi Ishiuchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Masaaki Fujii
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan. .,Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan.,International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
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13
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Sousa ESA, Queiroz LAD, Guimarães JPT, Pantoja KC, Barros RS, Epiphanio S, Martins JO. The influence of high glucose conditions on macrophages and its effect on the autophagy pathway. Front Immunol 2023; 14:1130662. [PMID: 37122742 PMCID: PMC10130370 DOI: 10.3389/fimmu.2023.1130662] [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: 12/23/2022] [Accepted: 03/13/2023] [Indexed: 05/02/2023] Open
Abstract
Introduction Macrophages are central cells in mediating the inflammatory response. Objective and Methods We evaluated the effect of high glucose conditions on the inflammatory profile and the autophagy pathway in Bone-Marrow Derived Macrophages (BMDM) from diabetic (D-BMDM) (alloxan: 60mg/kg, i.v.) and non-diabetic (ND-BMDM) C57BL/6 mice. BMDM were cultured in medium with normal glucose (5.5 mM), or high glucose (25 mM) concentration and were primed with Nigericin (20µM) stimulated with LPS (100 ng/mL) at times of 30 minutes; 2; 4; 6 and 24 hours, with the measurement of IL-6, IL-1β and TNF-α cytokines. Results We have further identified changes in the secretion of pro-inflammatory cytokines IL-6, IL-1β and TNF-α, where BMDM showed increased secretion of these cytokines after LPS + Nigericin stimulation. In addition, changes were observed in the autophagy pathway, where the increase in the autophagic protein LC3b and Beclin-1 occurred by macrophages of non-diabetic animals in hyperglycemic medium, without LPS stimulation. D-BMDM showed a reduction on the expression of LC3b and Beclin-1, suggesting an impaired autophagic process in these cells. Conclusion The results suggest that hyperglycemia alters the inflammatory pathways in macrophages stimulated by LPS, playing an important role in the inflammatory response of diabetic individuals.
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Affiliation(s)
- Emanuella S. A. Sousa
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, Brazil
| | - Luiz A. D. Queiroz
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, Brazil
| | - João P. T. Guimarães
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, Brazil
| | - Kamilla C. Pantoja
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, Brazil
| | - Rafael S. Barros
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, Brazil
| | - Sabrina Epiphanio
- Laboratory of Malaria Cellular and Molecular Immunopathology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, Brazil
| | - Joilson O. Martins
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, Brazil
- *Correspondence: Joilson O. Martins,
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14
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Vo KX, Hirata K, Lisy JM, Ishiuchi SI, Fujii M. Na + Selective Binding by Beauvericin and Its Mechanism Studied by Mass-Coupled Cold Ion Trap Infrared Spectroscopy. J Phys Chem Lett 2022; 13:11330-11334. [PMID: 36454047 DOI: 10.1021/acs.jpclett.2c02814] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Beauvericin (Bv) is a cyclic hexadepsipeptide mycotoxin that selectively transports ions across cell membranes. Characterization of its intrinsic ion affinity has been complicated by different previous results in condensed phases and biological membranes. We report the marked specificity between alkali metal ions by Bv using experimental and computational methods. Mass spectrometry shows Bv readily binds all five alkali ions; however, the complex with Na+ is the most abundant species, indicating a strong binding preference. Gas phase infrared spectroscopy and theoretical calculations show that Li+, K+, Rb+, and Cs+ are coordinated by three amide carbonyl oxygens on the N-methylamino-l-phenylalanyl face. Selectivity for Na+ is achieved as Bv sequesters Na+ in the center of its cavity formed by three amide carbonyl and three ester carbonyl groups, a configuration unique among alkali metal ions. This finding provides insight into the correlation between selectivity and conformation of Bv, essential for development of this mycotoxin.
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Affiliation(s)
- Kien X Vo
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Keisuke Hirata
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
- International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
| | - James M Lisy
- International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Shun-Ichi Ishiuchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
- International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
| | - Masaaki Fujii
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- International Research Frontiers Initiative (IRFI), Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
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15
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Dutta T, Das S, Gupta I, Koner AL. Construing the metaxin-2 mediated simultaneous localization between mitochondria and nucleolus using molecular viscometry. Chem Sci 2022; 13:12987-12995. [PMID: 36425508 PMCID: PMC9668072 DOI: 10.1039/d2sc03587a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 10/06/2022] [Indexed: 11/02/2023] Open
Abstract
Fluorescent probes for specific inter-organelle communication are of massive significance as such communication is essential for a diverse range of cellular events. Here, we present the microviscosity-sensitive fluorescence marker, Quinaldine Red (QR), and its dual organelle targeting light-up response in live cells. This biocompatible probe was able to localize in mitochondria and nucleolus simultaneously. While QR was able to sense the viscosity change inside these compartments under the induced effect of an ionophore and ROS-rich microenvironment, the probe's ability to stain mitochondria remained unperturbed even after protonophore-induced depolarization. Consequently, a systematic quantification was performed to understand the alteration of microviscosity. Similar behavior in two distinct organelles implied that QR binds to metaxin-2 protein, common to mitochondrial and nucleolar proteomes. We believe this is the first of its kind investigation that identifies the inter-organelle communications marker and opens up a new dimension in this field.
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Affiliation(s)
- Tanoy Dutta
- Bionanotechnology Lab, Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal Madhya Pradesh-462066 India
| | - Sreeparna Das
- Bionanotechnology Lab, Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal Madhya Pradesh-462066 India
| | - Ishaan Gupta
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi Hauz Khas New Delhi-110016 India
| | - Apurba Lal Koner
- Bionanotechnology Lab, Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal Madhya Pradesh-462066 India
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16
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Abstract
The quantification of anion binding by molecular receptors within lipid bilayers remains challenging. Here we measure anion binding in lipid bilayers by creating a fluorescent macrocycle featuring a strong sulfate affinity. We find the determinants of anion binding in lipid bilayers to be different from those expected that govern anion binding in solution. Charge-dense anions H2PO4- and Cl- that prevail in dimethyl sulfoxide fail to bind to the macrocycle in lipids. In stark contrast, ClO4- and I- that hardly bind in dimethyl sulfoxide show surprisingly significant affinities for the macrocycle in lipids. We reveal a lipid bilayer anion binding principle that depends on anion polarisability and bilayer penetration depth of complexes leading to unexpected advantages of charge-diffuse anions. These insights enhance our understanding of how biological systems select anions and guide the design of functional molecular systems operating at biomembrane interfaces.
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17
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Mioč M, Telbisz Á, Radman K, Bertoša B, Šumanovac T, Sarkadi B, Kralj M. Interaction of crown ethers with the ABCG2 transporter and their implication for multidrug resistance reversal. Histochem Cell Biol 2022. [PMID: 35648291 DOI: 10.1007/s00418-022-02106-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2022] [Indexed: 02/03/2023]
Abstract
Overexpression of ABC transporters, such as ABCB1 and ABCG2, plays an important role in mediating multidrug resistance (MDR) in cancer. This feature is also attributed to a subpopulation of cancer stem cells (CSCs), having enhanced tumourigenic potential. ABCG2 is specifically associated with the CSC phenotype, making it a valuable target for eliminating aggressive and resistant cells. Several natural and synthetic ionophores have been discovered as CSC-selective drugs that may also have MDR-reversing ability, whereas their interaction with ABCG2 has not yet been explored. We previously reported the biological activities, including ABCB1 inhibition, of a group of adamantane-substituted diaza-18-crown-6 (DAC) compounds that possess ionophore capabilities. In this study, we investigated the mechanism of ABCG2-inhibitory activity of DAC compounds and the natural ionophores salinomycin, monensin and nigericin. We used a series of functional assays, including real-time microscopic analysis of ABCG2-mediated fluorescent substrate transport in cells, and docking studies to provide comparative aspects for the transporter-compound interactions and their role in restoring chemosensitivity. We found that natural ionophores did not inhibit ABCG2, suggesting that their CSC selectivity is likely mediated by other mechanisms. In contrast, DACs with amide linkage in the side arms demonstrated noteworthy ABCG2-inhibitory activity, with DAC-3Amide proving to be the most potent. This compound induced conformational changes of the transporter and likely binds to both Cavity 1 and the NBD-TMD interface. DAC-3Amide reversed ABCG2-mediated MDR in model cells, without affecting ABCG2 expression or localization. These results pave the way for the development of new crown ether compounds with improved ABCG2-inhibitory properties.
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18
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Picci G, Marchesan S, Caltagirone C. Ion Channels and Transporters as Therapeutic Agents: From Biomolecules to Supramolecular Medicinal Chemistry. Biomedicines 2022; 10:biomedicines10040885. [PMID: 35453638 PMCID: PMC9032600 DOI: 10.3390/biomedicines10040885] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 03/05/2022] [Revised: 04/07/2022] [Accepted: 04/09/2022] [Indexed: 12/13/2022] Open
Abstract
Ion channels and transporters typically consist of biomolecules that play key roles in a large variety of physiological and pathological processes. Traditional therapies include many ion-channel blockers, and some activators, although the exact biochemical pathways and mechanisms that regulate ion homeostasis are yet to be fully elucidated. An emerging area of research with great innovative potential in biomedicine pertains the design and development of synthetic ion channels and transporters, which may provide unexplored therapeutic opportunities. However, most studies in this challenging and multidisciplinary area are still at a fundamental level. In this review, we discuss the progress that has been made over the last five years on ion channels and transporters, touching upon biomolecules and synthetic supramolecules that are relevant to biological use. We conclude with the identification of therapeutic opportunities for future exploration.
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Affiliation(s)
- Giacomo Picci
- Chemical and Geological Sciences Department, University of Cagliari, 09042 Cagliari, Italy;
| | - Silvia Marchesan
- Chemical and Pharmaceutical Sciences Department, University of Trieste, 34127 Trieste, Italy
- Correspondence: (S.M.); (C.C.)
| | - Claudia Caltagirone
- Chemical and Geological Sciences Department, University of Cagliari, 09042 Cagliari, Italy;
- Correspondence: (S.M.); (C.C.)
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Wu X, Gilchrist AM, Gale PA. Janus metal-organic layer functioning as a biomimetic photosynthetic reaction center. Chem 2022. [DOI: 10.1016/j.chempr.2022.01.019] [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: 11/16/2022]
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20
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von Grabowiecki Y, Phatak V, Aschauer L, Muller PAJ. Rab11-FIP1/RCP Functions as a Major Signalling Hub in the Oncogenic Roles of Mutant p53 in Cancer. Front Oncol 2021; 11:804107. [PMID: 35757381 PMCID: PMC9231559 DOI: 10.3389/fonc.2021.804107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 10/28/2021] [Accepted: 12/03/2021] [Indexed: 12/22/2022] Open
Abstract
Rab11-FIP1 is a Rab effector protein that is involved in endosomal recycling and trafficking of various molecules throughout the endocytic compartments of the cell. The consequence of this can be increased secretion or increased membrane expression of those molecules. In general, expression of Rab11-FIP1 coincides with more tumourigenic and metastatic cell behaviour. Rab11-FIP1 can work in concert with oncogenes such as mutant p53, but has also been speculated to be an oncogene in its own right. In this perspective, we will discuss and speculate upon our observations that mutant p53 promotes Rab11-FIP1 function to not only promote invasive behaviour, but also chemoresistance by regulating a multitude of different proteins.
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Affiliation(s)
- Yannick von Grabowiecki
- Tumour Suppressors Group, Cancer Research United Kingdom (UK) Manchester Institute, The University of Manchester, Macclesfield, United Kingdom
| | - Vinaya Phatak
- Medical Research Council (MRC) Toxicology Unit, Cambridge, United Kingdom
- Avacta Life Sciences, Cambridge, United Kingdom
| | - Lydia Aschauer
- Medical Research Council (MRC) Toxicology Unit, Cambridge, United Kingdom
- Orbit Discovery, Oxford, United Kingdom
| | - Patricia A. J. Muller
- Tumour Suppressors Group, Cancer Research United Kingdom (UK) Manchester Institute, The University of Manchester, Macclesfield, United Kingdom
- Department of Biosciences, Faculty of Science, Durham University, Durham, United Kingdom
- *Correspondence: Patricia A. J. Muller,
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21
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Watson DJ, Meyers PR, Acquah KS, Dziwornu GA, Barnett CB, Wiesner L. Discovery of Novel Cyclic Ethers with Synergistic Antiplasmodial Activity in Combination with Valinomycin. Molecules 2021; 26:molecules26247494. [PMID: 34946577 PMCID: PMC8708982 DOI: 10.3390/molecules26247494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/01/2021] [Revised: 12/01/2021] [Accepted: 12/07/2021] [Indexed: 11/16/2022] Open
Abstract
With drug resistance threatening our first line antimalarial treatments, novel chemotherapeutics need to be developed. Ionophores have garnered interest as novel antimalarials due to their theorized ability to target unique systems found in the Plasmodium-infected erythrocyte. In this study, during the bioassay-guided fractionation of the crude extract of Streptomyces strain PR3, a group of cyclodepsipeptides, including valinomycin, and a novel class of cyclic ethers were identified and elucidated. Further study revealed that the ethers were cyclic polypropylene glycol (cPPG) oligomers that had leached into the bacterial culture from an extraction resin. Molecular dynamics analysis suggests that these ethers are able to bind cations such as K+, NH4+ and Na+. Combination studies using the fixed ratio isobologram method revealed that the cPPGs synergistically improved the antiplasmodial activity of valinomycin and reduced its cytotoxicity in vitro. The IC50 of valinomycin against P. falciparum NF54 improved by 4-5-fold when valinomycin was combined with the cPPGs. Precisely, it was improved from 3.75 ± 0.77 ng/mL to 0.90 ± 0.2 ng/mL and 0.75 ± 0.08 ng/mL when dosed in the fixed ratios of 3:2 and 2:3 of valinomycin to cPPGs, respectively. Each fixed ratio combination displayed cytotoxicity (IC50) against the Chinese Hamster Ovary cell line of 57-65 µg/mL, which was lower than that of valinomycin (12.4 µg/mL). These results indicate that combinations with these novel ethers may be useful in repurposing valinomycin into a suitable and effective antimalarial.
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Affiliation(s)
- Daniel J. Watson
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town 7700, South Africa;
- Department of Molecular and Cell Biology, University of Cape Town, Cape Town 7700, South Africa; (P.R.M.); (K.S.A.)
- Correspondence:
| | - Paul R. Meyers
- Department of Molecular and Cell Biology, University of Cape Town, Cape Town 7700, South Africa; (P.R.M.); (K.S.A.)
| | - Kojo Sekyi Acquah
- Department of Molecular and Cell Biology, University of Cape Town, Cape Town 7700, South Africa; (P.R.M.); (K.S.A.)
- Department of Chemistry, University of Cape Town, Cape Town 7700, South Africa; (G.A.D.); (C.B.B.)
| | - Godwin A. Dziwornu
- Department of Chemistry, University of Cape Town, Cape Town 7700, South Africa; (G.A.D.); (C.B.B.)
| | | | - Lubbe Wiesner
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town 7700, South Africa;
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Kavanagh O, Elmes R, O’Sullivan F, Farragher J, Robinson S, Walker G. Investigating Structural Property Relationships to Enable Repurposing of Pharmaceuticals as Zinc Ionophores. Pharmaceutics 2021; 13:2032. [PMID: 34959313 PMCID: PMC8704213 DOI: 10.3390/pharmaceutics13122032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/17/2021] [Accepted: 11/22/2021] [Indexed: 12/12/2022] Open
Abstract
The importance of zinc in biology has gained greater recognition in recent years due to its essential contributions to the function of many endogenous enzymes. Disruption of zinc homeostasis may be useful in treating pathological conditions, such as Alzheimer's, and for antiviral purposes. Despite the growth of knowledge and increased interest in zinc, little is known about the structure and function of zinc ionophores. In this study we analyse the Cambridge Structural Database and solution complexation studies found in the literature to identify key functional groups which may confer zinc ionophorism. Pharmaceuticals, nutraceuticals and amino acids with these functionalities were selected to enable us to explore the translatability of ionophoric activity from in vitro assays to cellular systems. We find that although certain species may complex to zinc in the solid and solution states, and may carry ions across simple membrane systems, this does not necessarily translate into ionophoric activity. We propose that the CSD can help refine key functionalities but that ionophoric activity must be confirmed in cellular systems.
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Affiliation(s)
- Oisín Kavanagh
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
- School of Pharmacy, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
- School of Chemical Sciences, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
- Department of Chemistry, Maynooth University, National University of Ireland, W23 F2H6 Maynooth, Ireland
- National Institute for Cellular Biotechnology, Dublin City University, D09 NR58 Dublin, Ireland
| | - Robert Elmes
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
- Department of Chemistry, Maynooth University, National University of Ireland, W23 F2H6 Maynooth, Ireland
| | - Finbarr O’Sullivan
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
- National Institute for Cellular Biotechnology, Dublin City University, D09 NR58 Dublin, Ireland
| | - John Farragher
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
| | - Shane Robinson
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
- Janssen Pharmaceutical Sciences, T45 P663 Cork, Ireland
| | - Gavin Walker
- SSPC, The SFI Research Centre for Pharmaceuticals, V94 T9PX Limerick, Ireland; (R.E.); (F.O.); (J.F.); (S.R.)
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23
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Li G, De Oliveira DMP, Walker MJ. The antimicrobial and immunomodulatory effects of Ionophores for the treatment of human infection. J Inorg Biochem 2021; 227:111661. [PMID: 34896767 DOI: 10.1016/j.jinorgbio.2021.111661] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 10/27/2021] [Accepted: 11/03/2021] [Indexed: 12/18/2022]
Abstract
Ionophores are a diverse class of synthetic and naturally occurring ion transporter compounds which demonstrate both direct and in-direct antimicrobial properties against a broad panel of bacterial, fungal, viral and parasitic pathogens. In addition, ionophores can regulate the host-immune response during communicable and non-communicable disease states. Although the clinical use of ionophores such as Amphotericin B, Bedaquiline and Ivermectin highlight the utility of ionophores in modern medicine, for many other ionophore compounds issues surrounding toxicity, bioavailability or lack of in vivo efficacy studies have hindered clinical development. The antimicrobial and immunomodulating properties of a range of compounds with characteristics of ionophores remain largely unexplored. As such, ionophores remain a latent therapeutic avenue to address both the global burden of antimicrobial resistance, and the unmet clinical need for new antimicrobial therapies. This review will provide an overview of the broad-spectrum antimicrobial and immunomodulatory properties of ionophores, and their potential uses in clinical medicine for combatting infection.
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24
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Qi D, Liu Y, Li J, Huang JH, Hu X, Wu E. Salinomycin as a potent anticancer stem cell agent: State of the art and future directions. Med Res Rev 2021; 42:1037-1063. [PMID: 34786735 PMCID: PMC9298915 DOI: 10.1002/med.21870] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 12/11/2022]
Abstract
Cancer stem cells (CSCs) are a small subpopulation of cells within a tumor that can both self‐renew and differentiate into other cell types forming the heterogeneous tumor bulk. Since CSCs are involved in all aspects of cancer development, including tumor initiation, cell proliferation, metastatic dissemination, therapy resistance, and recurrence, they have emerged as attractive targets for cancer treatment and management. Salinomycin, a widely used antibiotic in poultry farming, was identified by the Weinberg group as a potent anti‐CSC agent in 2009. As a polyether ionophore, salinomycin exerts broad‐spectrum activities, including the important anti‐CSC function. Studies on the mechanism of action of salinomycin against cancer have been continuously and rapidly published since then. Thus, it is imperative for us to update its literature of recent research findings in this area. We here summarize the notable work reported on salinomycin's anticancer activities, intracellular binding target(s), effects on tumor microenvironment, safety, derivatives, and tumor‐specific drug delivery; after that we also discuss the translational potential of salinomycin toward clinical application based on current multifaceted understandings.
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Affiliation(s)
- Dan Qi
- Department of Neurosurgery, Baylor Scott & White Health, Temple, Texas, USA.,Neuroscience Institute, Baylor Scott & White Health, Temple, Texas, USA
| | - Yunyi Liu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theranostics, Hunan University, Changsha, China
| | - Juan Li
- Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theranostics, Hunan University, Changsha, China
| | - Jason H Huang
- Department of Neurosurgery, Baylor Scott & White Health, Temple, Texas, USA.,Neuroscience Institute, Baylor Scott & White Health, Temple, Texas, USA.,Department of Surgery, Texas A&M University College of Medicine, Temple, Texas, USA
| | - Xiaoxiao Hu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theranostics, Hunan University, Changsha, China.,Shenzhen Research Institute, Hunan University, Shenzhen, Guangdong, China
| | - Erxi Wu
- Department of Neurosurgery, Baylor Scott & White Health, Temple, Texas, USA.,Neuroscience Institute, Baylor Scott & White Health, Temple, Texas, USA.,Department of Surgery, Texas A&M University College of Medicine, Temple, Texas, USA.,LIVESTRONG Cancer Institutes and Department of Oncology, Dell Medical School, The University of Texas at Austin, Austin, Texas, USA.,Department of Pharmaceutical Sciences, Texas A&M University College of Pharmacy, College Station, Texas, USA
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25
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Shi C, Yang EJ, Tao S, Ren G, Mou PK, Shim JS. Natural products targeting cancer cell dependency. J Antibiot (Tokyo) 2021; 74:677-686. [PMID: 34163025 DOI: 10.1038/s41429-021-00438-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 06/03/2021] [Indexed: 02/06/2023]
Abstract
Precision cancer medicine is a tailored treatment approach for individual cancer patients with different genomic characteristics. Mutated or hyperactive oncogenes have served as main drug targets in current precision cancer medicine, while defective or inactivated tumor suppressors in general have not been considered as druggable targets. Synthetic lethality is one of very few approaches that enable to target defective tumor suppressors with pharmacological agents. Synthetic lethality exploits cancer cell dependency on a protein or pathway, which arises when the function of a tumor suppressor is defective. This approach has been proven to be effective in clinical settings since the successful clinical introduction of BRCA-PARP synthetic lethality for the treatment of breast and ovarian cancer with defective BRCA. Subsequently, large-scale screenings with RNAi, CRISPR/Cas9-sgRNAs, and chemical libraries have been applied to identify synthetic lethal partners of tumor suppressors. Natural products are an important source for the discovery of pharmacologically active small molecules. However, little effort has been made in the discovery of synthetic lethal small molecules from natural products. This review introduces recent advances in the discovery of natural products targeting cancer cell dependency and discusses potentials of natural products in the precision cancer medicine.
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Affiliation(s)
- Changxiang Shi
- Cancer Centre, Faculty of Health Sciences, University of Macau, Taipa, Macau SAR, China
| | - Eun Ju Yang
- Cancer Centre, Faculty of Health Sciences, University of Macau, Taipa, Macau SAR, China
| | - Shishi Tao
- Cancer Centre, Faculty of Health Sciences, University of Macau, Taipa, Macau SAR, China
| | - Guowen Ren
- Cancer Centre, Faculty of Health Sciences, University of Macau, Taipa, Macau SAR, China
| | - Pui Kei Mou
- Cancer Centre, Faculty of Health Sciences, University of Macau, Taipa, Macau SAR, China
| | - Joong Sup Shim
- Cancer Centre, Faculty of Health Sciences, University of Macau, Taipa, Macau SAR, China. .,MoE Frontiers Science Center for Precision Oncology, University of Macau, Taipa, Macau SAR, China.
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26
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Zhou B, Wang C, Liu X, Wu B, Li J, Yao S, Zhang S. Combination of nigericin with cisplatin enhances the inhibitory effect of cisplatin on epithelial ovarian cancer metastasis by inhibiting slug expression via the Wnt/β-catenin signalling pathway. Oncol Lett 2021; 22:700. [PMID: 34457055 PMCID: PMC8358618 DOI: 10.3892/ol.2021.12961] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 05/28/2021] [Indexed: 11/06/2022] Open
Abstract
Epithelial ovarian cancer (EOC) is the most lethal cancer among female genital tumours. Standard therapies, including postoperative chemotherapy, exhibit high proportions of recurrence and resistance. Novel therapeutic strategies are combined with chemotherapy. Emerging studies have demonstrated that nigericin, an H+, K+ and Pb2+ ionophore, exhibits promising anticancer activity in various types of malignancy, such as colorectal and epithelial ovarian cancer. Our previous study suggested that nigericin could regulate EOC cell proliferation, migration and invasion, and may be a novel chemotherapy candidate for EOC. However, to the best of our knowledge, the effects of combined therapy with cisplatin, and the associated underlying mechanisms, are not yet fully understood. The present study aimed to clarify the effects of combined chemical therapy with nigericin and cisplatin on EOC cells and to reveal its mechanism. Wound healing, Transwell, cell viability and colony formation assays were used to measure the migration, invasion and proliferation of EOC cells. Western blotting was used to detect protein expression. A slug overexpression lentivirus was used to create a slug overexpression model in SK-OV-3 cells. Small interfering RNA was used to knock down slug expression. Nigericin combined with cisplatin enhanced the inhibitory effects of cisplatin on the migration and colony formation of EOC cells. Nigericin also enhanced the inhibitory effects of cisplatin on the expression levels of MMP7, as well as the inhibitory effects of cisplatin on the expression levels of β-catenin and GSK-3β, indicating that nigericin and cisplatin regulated in the Wnt/β-catenin signalling pathway. When slug was knocked down, the effect of nigericin was weakened. Overexpression of slug could repress the inhibitory effect of nigericin on the Wnt/β-catenin signalling pathway. Furthermore, nigericin inhibited slug expression by enhancing its modification through small ubiquitin-like modifiers (SUMOs; referred to as SUMOylation). Overall, the present results demonstrated that nigericin combined with cisplatin might serve as a novel therapeutic strategy in patients with metastatic EOC because the combined therapy had higher effectiveness than single drug use. The underlying mechanism of combined therapy maybe the enhanced inhibitory effect of slug through its nigericin-induced SUMOylation.
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Affiliation(s)
- Bin Zhou
- Department of Gynecology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, P.R. China.,Department of Gynecology, Taishan Vocational College of Nursing, Taian, Shandong 271000, P.R. China
| | - Changlin Wang
- Department of Gynecology, Taishan Vocational College of Nursing, Taian, Shandong 271000, P.R. China
| | - Xiaobei Liu
- Department of Reproduction and Genetics, Taian City Central Hospital, Taian, Shandong 271000, P.R. China
| | - Bin Wu
- Department of Gynecology, Taishan Vocational College of Nursing, Taian, Shandong 271000, P.R. China
| | - Jianwei Li
- Department of Pharmacy and Laboratory Medicine, Taishan Vocational College of Nursing, Taian, Shandong 271000, P.R. China
| | - Shujuan Yao
- Department of Gynecology, Jining Medical University Affiliated Tengzhou Central People's Hospital, Tengzhou, Shandong 277599, P.R. China
| | - Shiqian Zhang
- Department of Gynecology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, P.R. China
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27
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Ando T, Suzuki-Karasaki M, Suzuki-Karasaki M, Ichikawa J, Ochiai T, Yoshida Y, Haro H, Suzuki-Karasaki Y. Combined Anticancer Effect of Plasma-Activated Infusion and Salinomycin by Targeting Autophagy and Mitochondrial Morphology. Front Oncol 2021; 11:593127. [PMID: 34150606 PMCID: PMC8212785 DOI: 10.3389/fonc.2021.593127] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 05/11/2021] [Indexed: 01/10/2023] Open
Abstract
Non-thermal atmospheric pressure plasma (NTAPP)-activated liquids have emerged as new promising anticancer agents because they preferentially injure malignant cells. Here, we report plasma-activated infusion (PAI) as a novel NTAPP-based anti-neoplastic agent. PAI was prepared by irradiating helium NTAP to form a clinically approved infusion fluid. PAI dose-dependently killed malignant melanoma and osteosarcoma cell lines while showing much lower cytotoxic effects on dermal and lung fibroblasts. We found that PAI and salinomycin (Sal), an emerging anticancer stem cell agent, mutually operated as adjuvants. The combined administration of PAI and Sal was much more effective than single-agent application in reducing the growth and lung metastasis of osteosarcoma allografts with minimal adverse effects. Mechanistically, PAI explicitly induced necroptosis and increased the phosphorylation of receptor-interacting protein 1/3 rapidly and transiently. PAI also suppressed the ambient autophagic flux by activating the mammalian target of the rapamycin pathway. PAI increased the phosphorylation of Raptor, Rictor, and p70-S6 kinase, along with decreased LC3-I/II expression. In contrast, Sal promoted autophagy. Moreover, Sal exacerbated the mitochondrial network collapse caused by PAI, resulting in aberrant clustering of fragmented mitochondrial in a tumor-specific manner. Our findings suggest that combined administration of PAI and Sal is a promising approach for treating these apoptosis-resistant cancers.
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Affiliation(s)
- Takashi Ando
- Department of Orthopaedic Surgery, Yamanashi University School of Medicine, Yamanashi, Japan
| | - Manami Suzuki-Karasaki
- Department of Research and Development, Plasma ChemiBio Laboratory, Plasma ChemiBio Laboratory, Nasushiobara, Tochigi, Japan
| | - Miki Suzuki-Karasaki
- Department of Research and Development, Plasma ChemiBio Laboratory, Plasma ChemiBio Laboratory, Nasushiobara, Tochigi, Japan
| | - Jiro Ichikawa
- Department of Orthopaedic Surgery, Yamanashi University School of Medicine, Yamanashi, Japan
| | - Toyoko Ochiai
- Department of Research and Development, Plasma ChemiBio Laboratory, Plasma ChemiBio Laboratory, Nasushiobara, Tochigi, Japan.,Department of Dermatology, Nihon University Hospital, Tokyo, Japan
| | - Yukihiro Yoshida
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Nihon University Orthopaedic Surgery, Tokyo, Japan
| | - Hirotaka Haro
- Department of Orthopaedic Surgery, Yamanashi University School of Medicine, Yamanashi, Japan
| | - Yoshihiro Suzuki-Karasaki
- Department of Research and Development, Plasma ChemiBio Laboratory, Plasma ChemiBio Laboratory, Nasushiobara, Tochigi, Japan
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28
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Maslowska-Jarzyna K, Korczak ML, Chmielewski MJ. Boosting Anion Transport Activity of Diamidocarbazoles by Electron Withdrawing Substituents. Front Chem 2021; 9:690035. [PMID: 34095089 PMCID: PMC8172623 DOI: 10.3389/fchem.2021.690035] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 04/26/2021] [Indexed: 12/17/2022] Open
Abstract
Artificial chloride transporters have been intensely investigated in view of their potential medicinal applications. Recently, we have established 1,8-diamidocarbazoles as a versatile platform for the development of active chloride carriers. In the present contribution, we investigate the influence of various electron-withdrawing substituents in positions 3 and 6 of the carbazole core on the chloride transport activity of these anionophores. Using lucigenin assay and large unilamellar vesicles as models, the 3,6-dicyano- and 3,6-dinitro- substituted receptors were found to be highly active and perfectly deliverable chloride transporters, with EC50,270s value as low as 22 nM for the Cl-/NO3 - exchange. Mechanistic studies revealed that diamidocarbazoles form 1:1 complexes with chloride in lipid bilayers and facilitate chloride/nitrate exchange by carrier mechanism. Furthermore, owing to its increased acidity, the 3,6-dinitro- substituted receptor acts as a pH-switchable transporter, with physiologically relevant apparent pKa of 6.4.
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Affiliation(s)
| | | | - Michał J. Chmielewski
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
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29
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Chen S, Chen C, Hu Y, Song G, Shen X. The diverse roles of circular RNAs in pancreatic cancer. Pharmacol Ther 2021; 226:107869. [PMID: 33895187 DOI: 10.1016/j.pharmthera.2021.107869] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 01/13/2021] [Revised: 04/15/2021] [Accepted: 04/20/2021] [Indexed: 12/13/2022]
Abstract
Pancreatic cancer is one of the malignant tumors with poor prognosis. The molecular mechanisms of pancreatic oncogenesis and malignant progression are not fully elucidated. Several key signaling pathways, such as Notch, Wnt and hedgehog pathways, are important to drive pancreatic carcinogenesis. Recently, noncoding RNAs, especially circular RNAs (circRNAs), have been characterized to participate into pancreatic cancer development. Therefore, in this review article, we describe the association between circRNAs and pancreatic cancer prognosis. Moreover, we discuss how circRNAs are involved in regulation of cellular processes in pancreatic cancer, including proliferation, apoptosis, cell cycle, migration, invasion, EMT, metastasis, angiogenesis, drug resistance and immune escape. Furthermore, we mention that several compounds could regulate the expression of circRNAs, indicating that targeting circRNAs by compounds might be helpful for treating pancreatic cancer patients.
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Affiliation(s)
- Sian Chen
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Chenbin Chen
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Yuanbo Hu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Gendi Song
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China
| | - Xian Shen
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, China.
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30
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Pomorski R, García-Valverde M, Quesada R, Chmielewski MJ. Transmembrane anion transport promoted by thioamides. RSC Adv 2021; 11:12249-12253. [PMID: 35423746 PMCID: PMC8697034 DOI: 10.1039/d1ra01646f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 03/02/2021] [Accepted: 03/19/2021] [Indexed: 12/22/2022] Open
Abstract
Thioamide groups represent useful hydrogen-bonding motifs for the development of active transmembrane anion transporters. Using a 1,8-di(thioamido)carbazole scaffold the superior performance of thioamides compared with the parent amides has been demonstrated.
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Affiliation(s)
- Robert Pomorski
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw Żwirki i Wigury 101 02-089 Warszawa Poland
| | | | - Roberto Quesada
- Departamento de Química, Universidad de Burgos Burgos 09001 Spain
| | - Michał J Chmielewski
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw Żwirki i Wigury 101 02-089 Warszawa Poland
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31
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Sato E, Hirata K, Lisy JM, Ishiuchi SI, Fujii M. Rethinking Ion Transport by Ionophores: Experimental and Computational Investigation of Single Water Hydration in Valinomycin-K + Complexes. J Phys Chem Lett 2021; 12:1754-1758. [PMID: 33570410 DOI: 10.1021/acs.jpclett.0c03372] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Valinomycin is a macrocyclic ionophore that transports K+ across hydrophobic membranes. Its function depends on selectivity, capture, transport, and release of the ion. While thermodynamics clearly indicate that valinomycin binds K+ preferentially over all other alkali ions, characterizing the capture/transport/release of K+ by valinomycin at the molecular level remains a challenge. The bracelet-like structure of valinomycin-K+ (K+VM) has the ion completely enveloped, facilitating transport through the cell membrane. We report that hydration by a single water molecule, (K+VM)(H2O), produces three different conformers, identified by infrared spectroscopy and supporting computational studies. For two minor conformers, the water prevents the ionophore from closing, a conformation that would inhibit diffusion through the membrane. However, the dominant conformer encloses both the ion and the water, replicating the bracelet-like K+VM and arguably enhancing diffusion through the membrane. This potential for active participation of water in transport through the hydrophobic cellular membrane has never been previously considered.
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Affiliation(s)
- Eiko Sato
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503 Yokohama, Japan
| | - Keisuke Hirata
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503 Yokohama, Japan
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503 Yokohama, Japan
| | - James M Lisy
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503 Yokohama, Japan
| | - Shun-Ichi Ishiuchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503 Yokohama, Japan
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503 Yokohama, Japan
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Masaaki Fujii
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503 Yokohama, Japan
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovation Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, 226-8503 Yokohama, Japan
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32
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Segura-Aguilar J, Tizabi Y. Ivermectin as a potential therapeutic in COVID-19. Clin Pharmacol Transl Med 2020; 4:160-161. [PMID: 33778414 PMCID: PMC7993655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Juan Segura-Aguilar
- Molecular & Clinical Pharmacology, ICBM, Faculty of Medicine, University of Chile, Chile
| | - Yousef Tizabi
- Department of Pharmacology, Howard University College of Medicine, Washington, DC, United States
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33
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Kuran D, Flis S, Antoszczak M, Piskorek M, Huczyński A. Ester derivatives of salinomycin efficiently eliminate breast cancer cells via ER-stress-induced apoptosis. Eur J Pharmacol 2020; 893:173824. [PMID: 33347821 DOI: 10.1016/j.ejphar.2020.173824] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 08/21/2020] [Revised: 12/13/2020] [Accepted: 12/16/2020] [Indexed: 12/25/2022]
Abstract
The polyether ionophore salinomycin (SAL) has been found to selectively target breast cancer cells, including those with stem-like phenotype. On the other hand, SAL amides and esters obtained through derivatisation of the C1 carboxyl of the ionophore were found to exhibit anticancer properties, whilst reducing potential toxicity issues which often occur during standard chemotherapy. However, the studies on the activity and especially on the mechanisms of action of this class of semi-synthetic products against breast cancer cells are very limited. Therefore, in this work, we confirmed the anti-breast cancer activity of SAL, and further investigated the potential of its selected C1 amide and ester analogs to destroy breast cancer cells, including the highly aggressive triple-negative MDA-MB-231 cells. Importantly, SAL esters were found to be more potent than the native structure and their amide counterparts. Our data revealed that SAL ester derivatives, particularly compounds 5 and 7 (2,2,2-trifluoroethyl and benzotriazole ester of SAL, respectively), increase the level of p-eIF2α (Ser51) and IRE1α proteins. Additionally, an increased level of DNA damage indicators such as γH2AX protein and modified guanine (8-oxoG) was observed. These findings suggest that the apoptosis of MCF-7 and MDA-MB-231 cells induced by the most promising esters derived from SAL may result from the interaction between ER stress and DNA damage response mechanisms.
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Affiliation(s)
- Dominika Kuran
- Department of Pharmacology, National Medicines Institute, Chełmska 30/34, 00‒725, Warsaw, Poland
| | - Sylwia Flis
- Department of Pharmacology, National Medicines Institute, Chełmska 30/34, 00‒725, Warsaw, Poland.
| | - Michał Antoszczak
- Department of Medical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61‒614, Poznań, Poland
| | - Marlena Piskorek
- Department of Pharmacology, National Medicines Institute, Chełmska 30/34, 00‒725, Warsaw, Poland
| | - Adam Huczyński
- Department of Medical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61‒614, Poznań, Poland.
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Doboszewska U, Wlaź P, Nowak G, Młyniec K. Targeting zinc metalloenzymes in coronavirus disease 2019. Br J Pharmacol 2020; 177:4887-4898. [PMID: 32671829 PMCID: PMC7405164 DOI: 10.1111/bph.15199] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [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: 05/29/2020] [Revised: 06/22/2020] [Accepted: 07/05/2020] [Indexed: 12/15/2022] Open
Abstract
Several lines of evidence support a link between the essential element zinc and the coronavirus disease 2019 (COVID-19). An important fact is that zinc is present in proteins of humans and of viruses. Some zinc sites in viral enzymes may serve as drug targets and may liberate zinc ions, thus leading to changes in intracellular concentration of zinc ions, while increased intracellular zinc may induce biological effects in both the host and the virus. Drugs such as chloroquine may contribute to increased intracellular zinc. Moreover, clinical trials on the use of zinc alone or in addition to other drugs in the prophylaxis/treatment of COVID-19 are ongoing. Thereby, we aim to discuss the rationale for targeting zinc metalloenzymes as a new strategy for the treatment of COVID-19. LINKED ARTICLES: This article is part of a themed issue on The Pharmacology of COVID-19. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v177.21/issuetoc.
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Affiliation(s)
- Urszula Doboszewska
- Department of PharmacobiologyJagiellonian University Medical CollegeKrakówPoland
| | - Piotr Wlaź
- Department of Animal Physiology and Pharmacology, Institute of Biological SciencesMaria Curie‐Skłodowska UniversityLublinPoland
| | - Gabriel Nowak
- Department of PharmacobiologyJagiellonian University Medical CollegeKrakówPoland
- Laboratory of Trace Elements Neurobiology, Department of Neurobiology, Maj Institute of PharmacologyPolish Academy of SciencesKrakówPoland
| | - Katarzyna Młyniec
- Department of PharmacobiologyJagiellonian University Medical CollegeKrakówPoland
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35
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Malla JA, Sharma VK, Lahiri M, Talukdar P. Esterase‐Activatable Synthetic M
+
/Cl
−
Channel Induces Apoptosis and Disrupts Autophagy in Cancer Cells. Chemistry 2020; 26:11946-11949. [DOI: 10.1002/chem.202002964] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Indexed: 01/25/2023]
Affiliation(s)
- Javid Ahmad Malla
- Department of ChemistryIndian Institute of Science Education and Research Pune Dr. Homi Bhabha Road Pashan Pune 411008 Maharashtra India
| | - Virender Kumar Sharma
- Department of BiologyIndian Institute of Science Education and Research Pune Dr. Homi Bhabha Road, Pashan Pune 411008 Maharashtra India
| | - Mayurika Lahiri
- Department of BiologyIndian Institute of Science Education and Research Pune Dr. Homi Bhabha Road, Pashan Pune 411008 Maharashtra India
| | - Pinaki Talukdar
- Department of ChemistryIndian Institute of Science Education and Research Pune Dr. Homi Bhabha Road Pashan Pune 411008 Maharashtra India
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Rizzo E. Ivermectin, antiviral properties and COVID-19: a possible new mechanism of action. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:1153-1156. [PMID: 32462282 PMCID: PMC7251046 DOI: 10.1007/s00210-020-01902-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 05/10/2020] [Indexed: 12/31/2022]
Abstract
Ivermectin is an antiparasitic drug that has shown also an effective pharmacological activity towards various infective agents, including viruses. This paper proposes an alternative mechanism of action for this drug that makes it capable of having an antiviral action, also against the novel coronavirus, in addition to the processes already reported in literature.
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Affiliation(s)
- Emanuele Rizzo
- Department of Prevention, Local Health Authority of Lecce (ASL Lecce), Lecce, Italy.
- Italian Society of Environmental Medicine (SIMA), Milan, Italy.
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Kamiya K. Development of Artificial Cell Models Using Microfluidic Technology and Synthetic Biology. Micromachines (Basel) 2020; 11:E559. [PMID: 32486297 PMCID: PMC7345299 DOI: 10.3390/mi11060559] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 05/28/2020] [Accepted: 05/29/2020] [Indexed: 02/07/2023]
Abstract
Giant lipid vesicles or liposomes are primarily composed of phospholipids and form a lipid bilayer structurally similar to that of the cell membrane. These vesicles, like living cells, are 5-100 μm in diameter and can be easily observed using an optical microscope. As their biophysical and biochemical properties are similar to those of the cell membrane, they serve as model cell membranes for the investigation of the biophysical or biochemical properties of the lipid bilayer, as well as its dynamics and structure. Investigation of membrane protein functions and enzyme reactions has revealed the presence of soluble or membrane proteins integrated in the giant lipid vesicles. Recent developments in microfluidic technologies and synthetic biology have enabled the development of well-defined artificial cell models with complex reactions based on the giant lipid vesicles. In this review, using microfluidics, the formations of giant lipid vesicles with asymmetric lipid membranes or complex structures have been described. Subsequently, the roles of these biomaterials in the creation of artificial cell models including nanopores, ion channels, and other membrane and soluble proteins have been discussed. Finally, the complex biological functions of giant lipid vesicles reconstituted with various types of biomolecules has been communicated. These complex artificial cell models contribute to the production of minimal cells or protocells for generating valuable or rare biomolecules and communicating between living cells and artificial cell models.
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Affiliation(s)
- Koki Kamiya
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu city, Gunma 376-8515, Japan
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38
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Saleh MY, Prajapati N, DeCoster MA, Lvov Y. Tagged Halloysite Nanotubes as a Carrier for Intercellular Delivery in Brain Microvascular Endothelium. Front Bioeng Biotechnol 2020; 8:451. [PMID: 32478061 PMCID: PMC7240041 DOI: 10.3389/fbioe.2020.00451] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 04/20/2020] [Indexed: 12/29/2022] Open
Abstract
Neurological disorders that are characterized by unpredictable seizures affect people of all ages. We proposed the use of nanocarriers such as halloysite nanotubes to penetrate the blood–brain barrier and effectively deliver the payload over an extended time period. These 50-nm diameter tubes are a natural biocompatible nanomaterial available in large quantities. We proved a prolonged gradual drug delivery mechanism by the nanotube encapsulating rhodamine isothiocyanate and then ionomycin into brain microvascular endothelial cells (BMVECs). Through delayed diffusion, the nanotubes effectively delivered the drug to the primary BMVECs without killing them, by binding and penetration in time periods of 1 to 24 h.
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Affiliation(s)
- Mahdi Yar Saleh
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, Ruston, LA, United States
| | - Neela Prajapati
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, Ruston, LA, United States
| | - Mark A DeCoster
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, Ruston, LA, United States
| | - Yuri Lvov
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, Ruston, LA, United States
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Michalak M, Lach MS, Antoszczak M, Huczyński A, Suchorska WM. Overcoming Resistance to Platinum-Based Drugs in Ovarian Cancer by Salinomycin and Its Derivatives-An In Vitro Study. Molecules 2020; 25:E537. [PMID: 31991882 DOI: 10.3390/molecules25030537] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 12/16/2022] Open
Abstract
Polyether ionophore salinomycin (SAL) and its semi-synthetic derivatives are recognized as very promising anticancer drug candidates due to their activity against various types of cancer cells, including multidrug-resistant populations. Ovarian cancer is the deadliest among gynecologic malignancies, which is connected with the development of chemoresistant forms of the disease in over 70% of patients after initial treatment regimen. Thus, we decided to examine the anticancer properties of SAL and selected SAL derivatives against a series of drug-sensitive (A2780, SK-OV-3) and derived drug-resistant (A2780 CDDP, SK-OV-3 CDDP) ovarian cancer cell lines. Although SAL analogs showed less promising IC50 values than SAL, they were identified as the antitumor agents that significantly overcome the resistance to platinum-based drugs in ovarian cancer, more potent than unmodified SAL and commonly used anticancer drugs—5-fluorouracil, gemcitabine, and cisplatin. Moreover, when compared with SAL used alone, our experiments proved for the first time increased selectivity of SAL-based dual therapy with 5-fluorouracil or gemcitabine, especially towards A2780 cell line. Looking closer at the results, SAL acted synergistically with 5-fluorouracil towards the drug-resistant A2780 cell line. Our results suggest that combinations of SAL with other antineoplastics may become a new therapeutic option for patients with ovarian cancer.
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Dudev T, Cheshmedzhieva D, Dimitrova R, Dorkov P, Pantcheva I. Factors governing the competition between group IA and IB cations for monensin A: a DFT/PCM study. RSC Adv 2020; 10:5734-5741. [PMID: 35497416 PMCID: PMC9049293 DOI: 10.1039/c9ra09784h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/22/2019] [Accepted: 01/29/2020] [Indexed: 01/01/2023] Open
Abstract
The results obtained suggest that the metal selectivity of monensin can be modulated by changing the solvents used.
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Affiliation(s)
- Todor Dudev
- Laboratory of Computational Chemistry and Spectroscopy
- Faculty of Chemistry and Pharmacy
- “St. Kl. Ohridski” University of Sofia
- 1164 Sofia
- Bulgaria
| | - Diana Cheshmedzhieva
- Laboratory of Computational Chemistry and Spectroscopy
- Faculty of Chemistry and Pharmacy
- “St. Kl. Ohridski” University of Sofia
- 1164 Sofia
- Bulgaria
| | - Radoslava Dimitrova
- Laboratory of Biocoordination and Bioanalytical Chemistry
- Faculty of Chemistry and Pharmacy
- “St. Kl. Ohridski” University of Sofia
- 1164 Sofia
- Bulgaria
| | - Peter Dorkov
- Biovet Ltd
- Research & Development Department
- Peshtera
- Bulgaria
| | - Ivayla Pantcheva
- Laboratory of Biocoordination and Bioanalytical Chemistry
- Faculty of Chemistry and Pharmacy
- “St. Kl. Ohridski” University of Sofia
- 1164 Sofia
- Bulgaria
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41
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Su Z, Ran X, Leitch JJ, Schwan AL, Faragher R, Lipkowski J. How Valinomycin Ionophores Enter and Transport K + across Model Lipid Bilayer Membranes. Langmuir 2019; 35:16935-16943. [PMID: 31742409 DOI: 10.1021/acs.langmuir.9b03064] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Valinomycin, a cyclic peptide, was incorporated into a biomimetic lipid membrane tethered to the surface of a gold (111) electrode. Electrochemical impedance spectroscopy was used to study the ionophore properties of the peptide, and polarization modulation infrared reflection absorption spectroscopy was employed to determine the conformation and orientation of valinomycin in the membrane. The combination of these two techniques provided unique information about the ionophore mechanism where valinomycin transports ions across the membrane by creating a complex with potassium ions and forming an ion pair with a counter anion. The ion pair resides within the hydrophobic fragment of the membrane and adopts a small angle of ∼22° with respect to the surface normal. This novel study provides new insights explaining the valinomycin ion transport mechanism in model biological membranes.
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Affiliation(s)
- ZhangFei Su
- Department of Chemistry , University of Guelph , Guelph , Ontario N1G 2W1 , Canada
| | - XueQin Ran
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - J Jay Leitch
- Department of Chemistry , University of Guelph , Guelph , Ontario N1G 2W1 , Canada
| | - Adrian L Schwan
- Department of Chemistry , University of Guelph , Guelph , Ontario N1G 2W1 , Canada
| | - Robert Faragher
- Department of Chemistry , University of Guelph , Guelph , Ontario N1G 2W1 , Canada
| | - Jacek Lipkowski
- Department of Chemistry , University of Guelph , Guelph , Ontario N1G 2W1 , Canada
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42
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Antoszczak M, Steverding D, Sulik M, Janczak J, Huczyński A. Anti-trypanosomal activity of doubly modified salinomycin derivatives. Eur J Med Chem 2019; 173:90-98. [DOI: 10.1016/j.ejmech.2019.03.061] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 03/27/2019] [Accepted: 03/29/2019] [Indexed: 01/21/2023]
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43
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García‐Calvo J, Torroba T, Brañas‐Fresnillo V, Perdomo G, Cózar‐Castellano I, Li Y, Legrand Y, Barboiu M. Manipulation of Transmembrane Transport by Synthetic K
+
Ionophore Depsipeptides and Its Implications in Glucose‐Stimulated Insulin Secretion in β‐Cells. Chemistry 2019; 25:9287-9294. [DOI: 10.1002/chem.201901372] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Indexed: 12/19/2022]
Affiliation(s)
- José García‐Calvo
- Department of ChemistryFaculty of ScienceUniversity of Burgos 09001 Burgos Spain
| | - Tomás Torroba
- Department of ChemistryFaculty of ScienceUniversity of Burgos 09001 Burgos Spain
| | | | - Germán Perdomo
- Department of Health SciencesSchool of Health SciencesUniversity of Burgos 09001 Burgos Spain
| | - Irene Cózar‐Castellano
- Institute of Molecular Biology and Genetics-IBGMUniversity of Valladolid-CSIC 47003 Valladolid Spain
| | - Yu‐Hao Li
- Adaptive Supramolecular Nanosystems GroupInstitut Européen des Membranes Place Eugène Bataillon, CC047 34095 Montpellier Cedex 5 France
| | - Yves‐Marie Legrand
- Adaptive Supramolecular Nanosystems GroupInstitut Européen des Membranes Place Eugène Bataillon, CC047 34095 Montpellier Cedex 5 France
| | - Mihail Barboiu
- Adaptive Supramolecular Nanosystems GroupInstitut Européen des Membranes Place Eugène Bataillon, CC047 34095 Montpellier Cedex 5 France
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Wang RQ, Geng J, Sheng WJ, Liu XJ, Jiang M, Zhen YS. The ionophore antibiotic gramicidin A inhibits pancreatic cancer stem cells associated with CD47 down-regulation. Cancer Cell Int 2019; 19:145. [PMID: 31139022 PMCID: PMC6532126 DOI: 10.1186/s12935-019-0862-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Accepted: 05/15/2019] [Indexed: 01/10/2023] Open
Abstract
Background Pancreatic cancer stem cells (CSCs), a special population of cells, renew themselves infinitely and resist to various treatment. Gramicidin A (GrA), an ionophore antibiotic derived from microorganism, can form channels across the cell membrane and disrupt cellular ionic homeostasis, leading to cell dysfunction and death. As reported, the ionophore antibiotic salinomycin (Sal) has been proved to kill CSCs effectively. Whether GrA owns the potential as a therapeutic drug for CSCs still remains unknown. This study investigated the effect of GrA on pancreatic CSCs and the mechanism. Methods Tumorsphere formation assay was performed to assess pancreatic CSCs self-renewal potential. In vitro hemolysis assay was determined to test the borderline concentration of GrA. CCK-8 assay was used to detect pancreatic cancer cell proliferation capability. Flow cytometry was performed to detect cell apoptosis and mitochondrial membrane potential. Scanning and transmission electron microscopy was used to observe ultrastructural morphological changes on cell membrane surface and mitochondria, respectively. Western blot analysis was used to determine relative protein expression levels. Immunofluorescence staining was performed to observe CD47 re-distribution. Results GrA at 0.05 μM caused tumorspheres disintegration and decrease in number of pancreatic cancer BxPC-3 and MIA PaCa-2 cells. GrA and Sal both inhibited cancer cell proliferation. The IC50 values of GrA and Sal for BxPC-3 cells were 0.025 μM and 0.363 μM; while for MIA PaCa-2 cells were 0.032 μM and 0.163 μM, respectively. Compared on equal concentrations, the efficacy of GrA was stronger than that of Sal. GrA at 0.1 μM or lower did not cause hemolysis. GrA induced ultrastructural changes, such as the decrease of microvilli-like protrusions on cell surface membrane and the swelling of mitochondria. GrA down-regulated the expression levels of CD133, CD44, and CD47; in addition, CD47 re-distribution was observed on cell surface. Moreover, GrA showed synergism with gemcitabine in suppressing cancer cell proliferation. Conclusions The study found that GrA was highly active against pancreatic CSCs. It indicates that GrA exerts inhibitory effects against pancreatic CSCs associated with CD47 down-regulation, implying that GrA might play a positive role in modulating the interaction between macrophages and tumor cells.
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Affiliation(s)
- Rui-Qi Wang
- NHC Key Laboratory of Biotechnology of Antibiotics, Laboratory of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Tiantan Xili, Beijing, 100050 China
| | - Jing Geng
- NHC Key Laboratory of Biotechnology of Antibiotics, Laboratory of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Tiantan Xili, Beijing, 100050 China
| | - Wei-Jin Sheng
- NHC Key Laboratory of Biotechnology of Antibiotics, Laboratory of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Tiantan Xili, Beijing, 100050 China
| | - Xiu-Jun Liu
- NHC Key Laboratory of Biotechnology of Antibiotics, Laboratory of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Tiantan Xili, Beijing, 100050 China
| | - Min Jiang
- NHC Key Laboratory of Biotechnology of Antibiotics, Laboratory of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Tiantan Xili, Beijing, 100050 China
| | - Yong-Su Zhen
- NHC Key Laboratory of Biotechnology of Antibiotics, Laboratory of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Tiantan Xili, Beijing, 100050 China
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45
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Antoszczak M, Huczyński A. Salinomycin and its derivatives - A new class of multiple-targeted "magic bullets". Eur J Med Chem 2019; 176:208-227. [PMID: 31103901 DOI: 10.1016/j.ejmech.2019.05.031] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [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: 11/30/2018] [Revised: 05/06/2019] [Accepted: 05/08/2019] [Indexed: 12/23/2022]
Abstract
The history of drug development clearly shows the scale of painstaking effort leading to a finished product - a highly biologically active agent that would be at the same time no or little toxic to human organism. Moreover, the aim of modern drug discovery can move from "one-molecule one-target" concept to more promising "one-molecule multiple-targets" one, particularly in the context of effective fight against cancer and other complex diseases. Gratifyingly, natural compounds are excellent source of potential drug leads. One of such promising naturally-occurring drug candidates is a polyether ionophore - salinomycin (SAL). This compound should be identified as multi-target agent for two reasons. Firstly, SAL combines a broad spectrum of bioactivity, including antibacterial, antifungal, antiviral, antiparasitic and anticancer activity, with high selectivity of action, proving its significant therapeutic potential. Secondly, the multimodal mechanism of action of SAL has been shown to be related to its interactions with multiple molecular targets and signalling pathways that are synergistic for achieving a therapeutic anticancer effect. On the other hand, according to the Paul Ehrlich's "magic bullet" concept, invariably inspiring the scientists working on design of novel target-selective molecules, a very interesting direction of research is rational chemical modification of SAL. Importantly, many of SAL derivatives have been found to be more promising as chemotherapeutics than the native structure. This concise review article is focused both on the possible role of SAL and its selected analogues in future antimicrobial and/or cancer therapy, and on the potential use of SAL as a new class of multiple-targeted "magic bullet" because of its multimodal mechanism of action.
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Affiliation(s)
- Michał Antoszczak
- Department of Bioorganic Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61‒614, Poznań, Poland
| | - Adam Huczyński
- Department of Bioorganic Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61‒614, Poznań, Poland.
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46
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Antoszczak M, Steverding D, Huczyński A. Anti-parasitic activity of polyether ionophores. Eur J Med Chem 2019; 166:32-47. [DOI: 10.1016/j.ejmech.2019.01.035] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/08/2019] [Accepted: 01/15/2019] [Indexed: 02/04/2023]
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47
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Huang X, Xiao F, Li Y, Qian W, Ding W, Ye X. Bypassing drug resistance by triggering necroptosis: recent advances in mechanisms and its therapeutic exploitation in leukemia. J Exp Clin Cancer Res 2018; 37:310. [PMID: 30541583 PMCID: PMC6291981 DOI: 10.1186/s13046-018-0976-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 11/23/2018] [Indexed: 12/20/2022]
Abstract
Resistance to regulated cell death is one of the hallmarks of human cancers; it maintains cell survival and significantly limits the effectiveness of conventional drug therapy. Leukemia represents a class of hematologic malignancies that is characterized by dysregulation of cell death pathways and treatment-related resistance. As the majority of chemotherapeutic and targeted drugs kill leukemia cells by triggering apoptosis, the observed resistance indicates the need for novel therapeutic strategies to reactivate nonapoptotic cell death programs in refractory leukemia. Necroptosis is a regulated form of necrosis that is precisely modulated by intracellular signaling pathways and thus provides potential molecular targets for rational therapeutic intervention. Indeed, accumulating evidence indicates that many current antitumor agents can activate necroptotic pathways and thereby induce leukemia cell death. Elucidation of the complete regulatory mechanism of necroptosis is expected to accelerate the development of novel therapeutic strategies for overcoming apoptosis resistance in leukemia. Here, we review the latest research advances in the regulatory mechanisms of necroptosis and summarize the progression of necroptosis-based therapeutic strategies in leukemia.
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Affiliation(s)
- Xianbo Huang
- Department of Hematology, the First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, China
| | - Feng Xiao
- Department of Hematology, the First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, China.,Malignant Lymphoma Diagnosis and Therapy Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Yuan Li
- Institute of Hematology, the First Hospital of Jiaxing, Jiaxing, 314000, China
| | - Wenbin Qian
- Department of Hematology, the First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, China.,Malignant Lymphoma Diagnosis and Therapy Center, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Wei Ding
- Department of Pathology, the First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, China.
| | - Xiujin Ye
- Department of Hematology, the First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou, 310003, China.
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