1
|
Grzywaczyk A, Smułek W, Kaczorek E. Saponaria officinalis saponins as a factor increasing permeability of Candida yeasts' biomembrane. World J Microbiol Biotechnol 2024; 40:152. [PMID: 38553646 DOI: 10.1007/s11274-024-03961-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 03/18/2024] [Indexed: 04/02/2024]
Abstract
Saponins are a large group of compounds, produced mostly by plants as a side product of their metabolic activity. These compounds have attracted much attention over the years mostly because of their surface activity and antibacterial, anti-inflammatory and antifungal properties. On the other hand, most of the hitherto research has concerned the action of saponins against microbial cells as a whole. Therefore, knowing the possible interaction of saponins with biomembrane, we decided to check in-vitro the influence of saponin-rich extract of Saponaria officinalis on spheroplasts of two Candida sp. The obtained results show that 10 mg L- 1 of extract increased the permeability of spheroplasts up to 21.76% relative to that of the control sample. Moreover, the evaluation of surface potential has revealed a decrease by almost 10 mV relative to that of the untreated samples. Such results suggest its direct correlation to integration of saponins into the biomembrane structure. The obtained results have proved the antifungal potential of saponins and their ability of permeabilization of cells. This proves the high potential of saponins use as additives to antifungal pharmaceutics, which is expected to lead to improvement of their action or reduction of required dosage.
Collapse
Affiliation(s)
- Adam Grzywaczyk
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, Poznan, 60-695, Poland.
| | - Wojciech Smułek
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, Poznan, 60-695, Poland
| | - Ewa Kaczorek
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, Poznan, 60-695, Poland
| |
Collapse
|
2
|
Park JS, Lee C, Cheon SY, Lee Y, Jeon H, Lee D, Kim SH, Lim SG, Koo H. Efficient drug supply in stem cell cytosol via pore-forming saponin nanoparticles promotes in vivo osteogenesis and bone regeneration. Biomaterials 2023; 302:122342. [PMID: 37804721 DOI: 10.1016/j.biomaterials.2023.122342] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/22/2023] [Accepted: 09/27/2023] [Indexed: 10/09/2023]
Abstract
Directional differentiation of stem cells is a key step in stem cell therapy. In this study, we developed saponin-based nanoparticles (Ad-SNPs) containing dexamethasone (Dex) and alpha-lipoic acid (ALA) to promote osteogenic differentiation of human mesenchymal stem cells (hMSCs) and bone regeneration. The Ad-SNPs can achieve rapid cellular uptake through a pore-forming effect without cytotoxic cationic charges. They also provide extended retention in cell cytosol due to their uptake route. These properties are advantageous in efficiently supplying drugs to the hMSCs. The combination of Dex and ALA facilitated mitochondrial fusion and prevented reactive oxygen species-induced DNA damage. It also helped to preserve mitochondrial dynamics, and the efficient supply of it provided by the Ad-SNPs induced differentiation of hMSCs into osteoblasts. The Ad-SNPs showed outstanding performance in osteoblast differentiation, maturation, and mineralization in 3D culture compared with NPs without saponin and with free drugs. When Ad-SNP-treated hMSCs were tested in a rat femoral bone defect model, they showed the fastest regeneration of bones and complete repair in the shortest period among all groups. To the best of our knowledge, this study is the first application of pore-forming saponin-based NPs with rapid cellular uptake and extended retention to stem cell therapy, and we demonstrated their promising potential in bone regeneration and efficient delivery of Dex and ALA.
Collapse
Affiliation(s)
- Ji Sun Park
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Chaehyun Lee
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Seo Young Cheon
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Yeeun Lee
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Hayoung Jeon
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Donghyun Lee
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Se Hee Kim
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Seong Gi Lim
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Heebeom Koo
- Department of Medical Life Sciences, Department of Biomedicine & Health Sciences, and Catholic Photomedicine Research Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.
| |
Collapse
|
3
|
Lacchini E, Venegas-Molina J, Goossens A. Structural and functional diversity in plant specialized metabolism signals and products: The case of oxylipins and triterpenes. CURRENT OPINION IN PLANT BIOLOGY 2023; 74:102371. [PMID: 37148672 DOI: 10.1016/j.pbi.2023.102371] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/03/2023] [Accepted: 04/03/2023] [Indexed: 05/08/2023]
Abstract
Metabolic enzymes tend to evolve towards catalytic efficacy, precision and speed. This seems particularly true for ancient and conserved enzymes involved in fundamental cellular processes that are present virtually in every cell and organism and converting and producing relatively limited metabolite numbers. Nevertheless, sessile organisms like plants have an astonishing repertoire of specific (specialized) metabolites that, by numbers and chemical complexity, by far exceed primary metabolites. Most theories agree that early gene duplication, subsequent positive selection and diversifying evolution have allowed relaxed selection of duplicated metabolic genes, thus facilitating the accumulation of mutations that could broaden substrate/product specificity and lower activation barriers and kinetics. Here, we use oxylipins, oxygenated fatty acids of plastidial origin to which the phytohormone jasmonate belongs, and triterpenes, a large group of specialized metabolites whose biosynthesis is often elicited by jasmonates, to showcase the structural and functional diversity of chemical signals and products in plant metabolism.
Collapse
Affiliation(s)
- Elia Lacchini
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium
| | - Jhon Venegas-Molina
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium
| | - Alain Goossens
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052, Ghent, Belgium; VIB Center for Plant Systems Biology, B-9052, Ghent, Belgium.
| |
Collapse
|
4
|
Chakroborty A, Pritchard DR, Bouillon ME, Cervi A, Kraehenbuehl R, Wild C, Fenn C, Holdsworth P, Capner C, Padalino G, Forde-Thomas JE, Payne J, Smith BG, Fisher M, Lahmann M, Baird MS, Hoffmann KF. Modified Hederagenin Derivatives Demonstrate Ex Vivo Anthelmintic Activity against Fasciola hepatica. Pharmaceutics 2023; 15:1869. [PMID: 37514055 PMCID: PMC10385850 DOI: 10.3390/pharmaceutics15071869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/26/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023] Open
Abstract
Infection with Fasciola hepatica (liver fluke) causes fasciolosis (or fascioliasis) and poses a considerable economic as well as welfare burden to both the agricultural and animal health sectors. Here, we explore the ex vivo anthelmintic potential of synthetic derivatives of hederagenin, isolated in bulk from Hedera helix. Thirty-six compounds were initially screened against F. hepatica newly excysted juveniles (NEJs) of the Italian strain. Eleven of these compounds were active against NEJs and were selected for further study, using adult F. hepatica derived from a local abattoir (provenance unknown). From these eleven compounds, six demonstrated activity and were further assessed against immature liver flukes of the Italian strain. Subsequently, the most active compounds (n = 5) were further evaluated in ex vivo dose response experiments against adult Italian strain liver flukes. Overall, MC042 was identified as the most active molecule and the EC50 obtained from immature and adult liver fluke assays (at 24 h post co-culture) are estimated as 1.07 μM and 13.02 μM, respectively. When compared to the in vitro cytotoxicity of MDBK bovine cell line, MC042 demonstrated the highest anthelmintic selectivity (44.37 for immature and 3.64 for adult flukes). These data indicate that modified hederagenins display properties suitable for further investigations as candidate flukicides.
Collapse
Affiliation(s)
- Anand Chakroborty
- The Department of Life Sciences (DLS), Aberystwyth University, Aberystwyth SY23 3DA, UK
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, TX 79430, USA
| | | | - Marc E Bouillon
- School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
| | - Anna Cervi
- Naturiol Bangor Ltd., MSParc, Gaerwen, Anglesey LL60 6AG, UK
| | | | - Charlotte Wild
- Ridgeway Research Limited, Park Farm Buildings, Park Lane, St. Briavels, Gloucestershire GL15 6QX, UK
| | - Caroline Fenn
- Ridgeway Research Limited, Park Farm Buildings, Park Lane, St. Briavels, Gloucestershire GL15 6QX, UK
| | - Peter Holdsworth
- Ridgeway Research Limited, Park Farm Buildings, Park Lane, St. Briavels, Gloucestershire GL15 6QX, UK
- PAH Consultancy Pty Ltd., 3/27 Gaunson Crescent, Wanniassa, Canberra 2903, Australia
| | - Colin Capner
- Ridgeway Research Limited, Park Farm Buildings, Park Lane, St. Briavels, Gloucestershire GL15 6QX, UK
| | - Gilda Padalino
- The Department of Life Sciences (DLS), Aberystwyth University, Aberystwyth SY23 3DA, UK
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, UK
| | | | - Joseph Payne
- Ridgeway Research Limited, Park Farm Buildings, Park Lane, St. Briavels, Gloucestershire GL15 6QX, UK
| | - Brendan G Smith
- Bimeda UK, Bryn Cefni Industrial Estate, Unit 2A, Llangefni LL77 7XA, UK
| | - Maggie Fisher
- Ridgeway Research Limited, Park Farm Buildings, Park Lane, St. Briavels, Gloucestershire GL15 6QX, UK
| | - Martina Lahmann
- School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
- KTH Royal Institute of Technology, Biomedical Engineering and Health Systems, Hälsovägen 11, 141 52 Huddinge, Sweden
| | - Mark S Baird
- Naturiol Bangor Ltd., MSParc, Gaerwen, Anglesey LL60 6AG, UK
| | - Karl F Hoffmann
- The Department of Life Sciences (DLS), Aberystwyth University, Aberystwyth SY23 3DA, UK
| |
Collapse
|
5
|
Ciesielska-Figlon K, Wojciechowicz K, Daca A, Kokotkiewicz A, Łuczkiewicz M, Witkowski JM, Lisowska KA. The Impact of Nigella sativa Essential Oil on T Cells in Women with Hashimoto's Thyroiditis. Antioxidants (Basel) 2023; 12:1246. [PMID: 37371976 DOI: 10.3390/antiox12061246] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND Hashimoto's thyroiditis (HT) is an autoimmune disease mediated by T cells. It is characterized by the presence of thyroid autoantibodies in the serum, such as anti-thyroid peroxidase antibodies (TPO-Ab) and anti-thyroglobulin antibodies (TG-Ab). The essential oil extracted from Nigella sativa seeds is rich in bioactive substances, such as thymoquinone and cymene. METHODS Therefore, we examined the effect of essential oil from Nigella sativa (NSEO) on T cells from HT patients, especially their proliferation capacity, ability to produce cytokines, and susceptibility to apoptosis. RESULTS The lowest ethanol (EtOH) dilution (1:10) of NSEO significantly inhibited the proliferation of CD4+ and CD8+ T cells from HT patients and healthy women by affecting the percentage of dividing cells and the number of cell divisions. In addition, 1:10 and 1:50 NSEO dilutions induced cell death. Different dilutions of NSEO also reduced the concentration of IL-17A and IL-10. In healthy women, the level of IL-4 and IL-2 significantly increased in the presence of 1:10 and 1:50 NSEO dilutions. NSEO did not influence the concentration of IL-6 and IFN-γ. CONCLUSIONS Our study demonstrates that NSEO has a strong immunomodulatory effect on the lymphocytes of HT patients.
Collapse
Affiliation(s)
- Klaudia Ciesielska-Figlon
- Department of Physiopathology, Faculty of Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland
| | - Karolina Wojciechowicz
- Department of Physiopathology, Faculty of Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland
| | - Agnieszka Daca
- Division of Pathology and Experimental Rheumatology, Faculty of Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland
| | - Adam Kokotkiewicz
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University of Gdańsk, 80-210 Gdańsk, Poland
| | - Maria Łuczkiewicz
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University of Gdańsk, 80-210 Gdańsk, Poland
| | - Jacek Maciej Witkowski
- Department of Physiopathology, Faculty of Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland
| | | |
Collapse
|
6
|
Horse Chestnut Saponins-Escins, Isoescins, Transescins, and Desacylescins. Molecules 2023; 28:molecules28052087. [PMID: 36903330 PMCID: PMC10004172 DOI: 10.3390/molecules28052087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/19/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
Escins constitute an abundant family of saponins (saponosides) and are the most active components in Aesculum hippocastanum (horse chestnut-HC) seeds. They are of great pharmaceutical interest as a short-term treatment for venous insufficiency. Numerous escin congeners (slightly different compositions), as well as numerous regio-and stereo-isomers, are extractable from HC seeds, making quality control trials mandatory, especially since the structure-activity relationship (SAR) of the escin molecules remains poorly described. In the present study, mass spectrometry, microwave activation, and hemolytic activity assays were used to characterize escin extracts (including a complete quantitative description of the escin congeners and isomers), modify the natural saponins (hydrolysis and transesterification) and measure their cytotoxicity (natural vs. modified escins). The aglycone ester groups characterizing the escin isomers were targeted. A complete quantitative analysis, isomer per isomer, of the weight content in the saponin extracts as well as in the seed dry powder is reported for the first time. An impressive 13% in weight of escins in the dry seeds was measured, confirming that the HC escins must be absolutely considered for high-added value applications, provided that their SAR is established. One of the objectives of this study was to contribute to this development by demonstrating that the aglycone ester functions are mandatory for the toxicity of the escin derivative, and that the cytotoxicity also depends on the relative position of the ester functions on the aglycone.
Collapse
|
7
|
Kim S, Lee KH, Choi HJ, Kim E, Kang S, Han M, Jeon HJ, Yun MY, Song GY, Lee HJ. Hederacolchiside A1 Suppresses Autophagy by Inhibiting Cathepsin C and Reduces the Growth of Colon Cancer. Cancers (Basel) 2023; 15:cancers15041272. [PMID: 36831614 PMCID: PMC9953978 DOI: 10.3390/cancers15041272] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/15/2023] [Accepted: 02/15/2023] [Indexed: 02/19/2023] Open
Abstract
While autophagy degrades non-functional or unnecessary cellular components, producing materials for synthesizing cellular components, it can also provide energy for tumor development. Hederacolchiside A1 (HA1) derived from anemone raddeana has anticancer effects on several carcinomas by inducing apoptosis or exhibiting cytotoxicity, but the relationship with autophagy has not been studied. We investigated the association between HA1 and autophagy and evaluated its anticancer effect on colon cancer. HA1 induced accumulation of the autophagy-related markers LC3B and SQSTM1, with distinct vacuolar formation, unlike other autophagy inhibitors; the effects were similar to those of chloroquine. In addition, HA1 decreased the expression and proteolytic activity of lysosomal protein cathepsin C, reduced the growth of colon cancer cells in vitro, and inhibited tumor growth in vivo. It also reduced the expression of Ki-67 and cathepsin C in mouse tissues and reduced the growth of spheroids and organoids composed of cancer cells. Taken together, these results imply that HA1 regulates cell growth and autophagy and has potential as a promising therapeutic agent in colon cancer.
Collapse
Affiliation(s)
- Solbi Kim
- Department of Medical Science, Chungnam National University College of Medicine, Daejeon 34134, Republic of Korea
| | - Kyung-Ha Lee
- Department of Surgery, Chungnam National University College of Medicine, Daejeon 35015, Republic of Korea
| | - Hui-Ji Choi
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Eunji Kim
- Department of Medical Science, Chungnam National University College of Medicine, Daejeon 34134, Republic of Korea
| | - Sora Kang
- Department of Internal Medicine, Chungnam National University College of Medicine, Daejeon 35015, Republic of Korea
| | - Minju Han
- Department of Medical Science, Chungnam National University College of Medicine, Daejeon 34134, Republic of Korea
| | - Heung Jin Jeon
- Infection Control Convergence Research Center, Chungnam National University College of Medicine, Daejeon 34134, Republic of Korea
| | - Mi-Young Yun
- Department of Beauty Science, Kwangju Women’s University, Gwangju 62396, Republic of Korea
| | - Gyu-Yong Song
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
- Correspondence: (G.-Y.S.); (H.J.L.)
| | - Hyo Jin Lee
- Department of Internal Medicine, Chungnam National University College of Medicine, Daejeon 35015, Republic of Korea
- Infection Control Convergence Research Center, Chungnam National University College of Medicine, Daejeon 34134, Republic of Korea
- Correspondence: (G.-Y.S.); (H.J.L.)
| |
Collapse
|
8
|
Sokolov SS, Volynsky PE, Zangieva OT, Severin FF, Glagoleva ES, Knorre DA. Cytostatic effects of structurally different ginsenosides on yeast cells with altered sterol biosynthesis and transport. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:183993. [PMID: 35724740 DOI: 10.1016/j.bbamem.2022.183993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/16/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
Triterpene glycosides are a diverse group of plant secondary metabolites, consisting of a sterol-like aglycon and one or several sugar groups. A number of triterpene glycosides show membranolytic activity, and, therefore, are considered to be promising antimicrobial drugs. However, the interrelation between their structure, biological activities, and target membrane lipid composition remains elusive. Here we studied the antifungal effects of four Panax triterpene glycosides (ginsenosides) with sugar moieties at the C-3 (ginsenosides Rg3, Rh2), C-20 (compound K), and both (ginsenoside F2) positions in Saccharomyces cerevisiae mutants with altered sterol plasma membrane composition. We observed reduced cytostatic activity of the Rg3 and compound K in the UPC2-1 strain with high membrane sterol content. Moreover, LAM gene deletion reduced yeast resistance to Rg3 and digitonin, another saponin with glycosylated aglycon in the C-3 position. LAM genes encode plasma membrane-anchored StARkin superfamily-member sterol transporters. We also showed that the deletion of the ERG6 gene that inhibits ergosterol biosynthesis at the stage of zymosterol increased the cytostatic effects of Rg3 and Rh2, but not the other two tested ginsenosides. At the same time, in silico simulation revealed that the substitution of ergosterol with zymosterol in the membrane changes the spatial orientation of Rg3 and Rh2 in the membranes. These results imply that the plasma membrane sterol composition defines its interaction with triterpene glycoside depending on their glycoside group position. Our results also suggest that the biological role of membrane-anchored StARkin family protein is to protect eukaryotic cells from triterpenes glycosylated at the C-3 position.
Collapse
Affiliation(s)
- Svyatoslav S Sokolov
- Department of Molecular Energetics of Microorganisms, Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991, Leninskie Gory 1-40, Moscow, Russia
| | - Pavel E Volynsky
- Laboratory of Biomolecular Modeling, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997, Miklukho-Maklaya Str., 16/10, Moscow, Russia
| | - Olga T Zangieva
- Federal State Budgetary Institution "National Medical and Surgical Center named after N.I.Pirogov" of the Ministry of Healthcare of the Russian Federation, 105203, Nizhnyaya Pervomayskaya str., 70, Moscow, Russia
| | - Fedor F Severin
- Department of Molecular Energetics of Microorganisms, Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991, Leninskie Gory 1-40, Moscow, Russia
| | - Elena S Glagoleva
- Faculty of Biology, Lomonosov Moscow State University, 119991, Leninskie Gory 1-12, Moscow, Russia
| | - Dmitry A Knorre
- Department of Molecular Energetics of Microorganisms, Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991, Leninskie Gory 1-40, Moscow, Russia.
| |
Collapse
|
9
|
Garza DL, Hanashima S, Umegawa Y, Murata M, Kinoshita M, Matsumori N, Greimel P. Behavior of Triterpenoid Saponin Ginsenoside Rh2 in Ordered and Disordered Phases in Model Membranes Consisting of Sphingomyelin, Phosphatidylcholine, and Cholesterol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10478-10491. [PMID: 35984899 DOI: 10.1021/acs.langmuir.2c01261] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The ginsenoside Rh2 (Rh2) is a saponin of medicinal ginseng, and it has attracted much attention for its pharmacological activities. In this study, we investigated the interaction of Rh2 with biological membranes using model membranes. We examined the effects of various lipids on the membrane-disrupting activity of Rh2 and found that cholesterol and sphingomyelin (SM) had no significant effect. Furthermore, the effects of Rh2 on acyl chain packing (DPH anisotropy) and water molecule permeability (GP340 values) did not differ significantly between bilayers containing SM and saturated phosphatidylcholine. These results suggest that the formation of the liquid-ordered (Lo) phase affects the behavior of Rh2 in the membrane rather than a specific interaction of Rh2 with a particular lipid. We investigated the effects of Rh2 on the Lo and liquid-disordered (Ld) phases using surface tension measurements and fluorescence experiments. In the surface tension-area isotherms, we compared the monolayers of the Ld and Lo lipid compositions and found that Rh2 is abundantly bound to both monolayers, with the amount being greater in the Ld phase than in the Lo phase. In addition, the hydration state of the bilayers, mainly consisting of the Lo or Ld phase, showed that Rh2 tends to bind to the surface of the bilayer in both phases. At higher concentrations, Rh2 tends to bind more abundantly to the relatively shallow interior of the Ld phase than the Lo phase. The phase-dependent membrane behavior of Rh2 is probably due to the phase-selective affinity and binding mode of Rh2.
Collapse
Affiliation(s)
- Darcy Lacanilao Garza
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Shinya Hanashima
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Yuichi Umegawa
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
- Forefront Research Center, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Masanao Kinoshita
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Nobuaki Matsumori
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Peter Greimel
- Laboratory for Cell Function Dynamics, RIKEN Center for Brain Science, Wako, Saitama 351-0198 Japan
| |
Collapse
|
10
|
Benarbia MEA, Gaignon P, Manoli C, Chicoteau P. Saponin-Rich Plant Premixture Supplementation Is as Efficient as Ionophore Monensin Supplementation Under Experimental Eimeria spp Challenge in Broiler Chicken. Front Vet Sci 2022; 9:946576. [PMID: 35909689 PMCID: PMC9330371 DOI: 10.3389/fvets.2022.946576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 06/16/2022] [Indexed: 11/27/2022] Open
Abstract
For decades avian coccidiosis prevention was based on the use of synthetic coccidiostats. However, their intensive use led to the development of resistance phenomena. In addition, societal demand is increasing for antibiotic-free animal products. Thus, there is a need for a natural and efficient solution for coccidiosis management. Saponin-rich plants, like Yucca schidigera and Trigonella foenum-graecum, are promising tools for coccidiosis management. This study assessed the effects of supplementing broiler chickens with a commercial blend of these two plants (NorponinXO2) under an experimental Eimeria challenge and compared their effects to monensin supplementation. Three trials were performed. For each trial, chickens were divided into 4 groups, untreated uninfested control (UUC), infested untreated control (IUC), infested supplemented with 120 ppm of Monensin in feed (PM), and infested supplemented with 250 ppm of Norponin XO2 in the feed (PX). Chickens were raised in cages; experimental infestation was performed on d14. On d21, intestinal lesions (ILs) scores and growth performances were recorded. A statistical study was carried out on each trial, as well as data from the 3 trials. Experimental infestation reduced in a significant way final body weight in IUC broilers compared to UUC broilers. This loss was numerically compensated by PM and PX treatment. As expected, intestinal lesions were almost absent in the UUC group; however, broilers from the IUC group showed a higher intestinal lesion occurrence. Supplementations with Monensin and NPXO were able to reduce intestinal lesions occurrence. These results suggest that NPXO supplementation is as efficient as Monensin in managing coccidiosis.
Collapse
Affiliation(s)
- Mohammed el Amine Benarbia
- Feed In Tech Join lab, 42 rue Georges Morel, Beaucouzé, France
- Nor Feed, 3 rue Amedeo Avogadro, Beaucouzé, France
- *Correspondence: Mohammed el Amine Benarbia
| | - Pierre Gaignon
- URSE, Ecole Supérieure d'Agricultures, University Bretagne Loire, Angers, France
| | - Claire Manoli
- URSE, Ecole Supérieure d'Agricultures, University Bretagne Loire, Angers, France
| | - Pierre Chicoteau
- Feed In Tech Join lab, 42 rue Georges Morel, Beaucouzé, France
- Nor Feed, 3 rue Amedeo Avogadro, Beaucouzé, France
| |
Collapse
|
11
|
Savarino P, Contino C, Colson E, Cabrera-Barjas G, De Winter J, Gerbaux P. Impact of the Hydrolysis and Methanolysis of Bidesmosidic Chenopodium quinoa Saponins on Their Hemolytic Activity. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103211. [PMID: 35630692 PMCID: PMC9144749 DOI: 10.3390/molecules27103211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/22/2022] [Accepted: 05/13/2022] [Indexed: 11/16/2022]
Abstract
Saponins are specific metabolites abundantly present in plants and several marine animals. Their high cytotoxicity is associated with their membranolytic properties, i.e., their propensity to disrupt cell membranes upon incorporation. As such, saponins are highly attractive for numerous applications, provided the relation between their molecular structures and their biological activities is understood at the molecular level. In the present investigation, we focused on the bidesmosidic saponins extracted from the quinoa husk, whose saccharidic chains are appended on the aglycone via two different linkages, a glycosidic bond, and an ester function. The later position is sensitive to chemical modifications, such as hydrolysis and methanolysis. We prepared and characterized three sets of saponins using mass spectrometry: (i) bidesmosidic saponins directly extracted from the ground husk, (ii) monodesmosidic saponins with a carboxylic acid group, and (iii) monodesmosidic saponins with a methyl ester function. The impact of the structural modifications on the membranolytic activity of the saponins was assayed based on the determination of their hemolytic activity. The natural bidesmosidic saponins do not present any hemolytic activity even at the highest tested concentration (500 µg·mL−1). Hydrolyzed saponins already degrade erythrocytes at 20 µg·mL−1, whereas 100 µg·mL−1 of transesterified saponins is needed to induce detectable activity. The observation that monodesmosidic saponins, hydrolyzed or transesterified, are much more active against erythrocytes than the bidesmosidic ones confirms that bidesmosidic saponins are likely to be the dormant form of saponins in plants. Additionally, the observation that negatively charged saponins, i.e., the hydrolyzed ones, are more hemolytic than the neutral ones could be related to the red blood cell membrane structure.
Collapse
Affiliation(s)
- Philippe Savarino
- Organic Synthesis and Mass Spectrometry Laboratory (S²MOs), University of Mons—UMONS, 23 Place du Parc, 7000 Mons, Belgium; (P.S.); (C.C.); (E.C.); (J.D.W.)
| | - Carolina Contino
- Organic Synthesis and Mass Spectrometry Laboratory (S²MOs), University of Mons—UMONS, 23 Place du Parc, 7000 Mons, Belgium; (P.S.); (C.C.); (E.C.); (J.D.W.)
| | - Emmanuel Colson
- Organic Synthesis and Mass Spectrometry Laboratory (S²MOs), University of Mons—UMONS, 23 Place du Parc, 7000 Mons, Belgium; (P.S.); (C.C.); (E.C.); (J.D.W.)
| | - Gustavo Cabrera-Barjas
- Unidad de Desarrollo Tecnológico (UDT), Universidad de Concepción, Av. Cordillera 2634, Parque Industrial Coronel, Concepción 4030000, Región del Bío Bío, Chile;
| | - Julien De Winter
- Organic Synthesis and Mass Spectrometry Laboratory (S²MOs), University of Mons—UMONS, 23 Place du Parc, 7000 Mons, Belgium; (P.S.); (C.C.); (E.C.); (J.D.W.)
| | - Pascal Gerbaux
- Organic Synthesis and Mass Spectrometry Laboratory (S²MOs), University of Mons—UMONS, 23 Place du Parc, 7000 Mons, Belgium; (P.S.); (C.C.); (E.C.); (J.D.W.)
- Correspondence:
| |
Collapse
|
12
|
Vasanth K, Minakshi GC, Velu K, Priya T, Kumar RM, Kaliappan I, Dubey GP. Anti‐adipogenic β‐sitosterol and lupeol from
Moringa oleifera
suppress adipocyte differentiation through regulation of cell cycle progression. J Food Biochem 2022; 46:e14170. [DOI: 10.1111/jfbc.14170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/22/2022] [Accepted: 03/22/2022] [Indexed: 12/22/2022]
Affiliation(s)
- Karunamoorthy Vasanth
- Division of Molecular Biology Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Institute of Science and Technology Kattankulathur India
| | - Guha Chowdhury Minakshi
- Division of Molecular Biology Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Institute of Science and Technology Kattankulathur India
| | - Karthick Velu
- Centre for Ocean Research Sathyabama Institute of Science and Technology Chennai India
| | - Tanu Priya
- Division of Molecular Biology Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Institute of Science and Technology Kattankulathur India
| | - R. Mohan Kumar
- Division of Phytochemistry Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Institute of Science and Technology Kattankulathur India
| | - Ilango Kaliappan
- Department of Pharmaceutical Chemistry, SRM College of Pharmacy SRM Institute of Science and Technology Kattankulathur India
| | - Govind Prasad Dubey
- National Facility for Tribal and Herbal Medicine Institute of Medical Sciences, Banaras Hindu University Varanasi India
| |
Collapse
|
13
|
Microwave-Assisted Desulfation of the Hemolytic Saponins Extracted from Holothuria scabra Viscera. Molecules 2022; 27:molecules27020537. [PMID: 35056852 PMCID: PMC8780253 DOI: 10.3390/molecules27020537] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/11/2022] [Accepted: 01/12/2022] [Indexed: 11/17/2022] Open
Abstract
Saponins are plant and marine animal specific metabolites that are commonly considered as molecular vectors for chemical defenses against unicellular and pluricellular organisms. Their toxicity is attributed to their membranolytic properties. Modifying the molecular structures of saponins by quantitative and selective chemical reactions is increasingly considered to tune the biological properties of these molecules (i) to prepare congeners with specific activities for biomedical applications and (ii) to afford experimental data related to their structure-activity relationship. In the present study, we focused on the sulfated saponins contained in the viscera of Holothuria scabra, a sea cucumber present in the Indian Ocean and abundantly consumed on the Asian food market. Using mass spectrometry, we first qualitatively and quantitatively assessed the saponin content within the viscera of H. scabra. We detected 26 sulfated saponins presenting 5 different elemental compositions. Microwave activation under alkaline conditions in aqueous solutions was developed and optimized to quantitatively and specifically induce the desulfation of the natural saponins, by a specific loss of H2SO4. By comparing the hemolytic activities of the natural and desulfated extracts, we clearly identified the sulfate function as highly responsible for the saponin toxicity.
Collapse
|
14
|
Goyal A, Singh P, Chamoli P, Raina K, Shukla RK. Eco-friendly Biowaste-based natural surfactant for lyotropic assemblies and Bio-adsorbent for dye removal. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108871] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
15
|
Ortiz J, Aranda FJ, Teruel JA, Ortiz A. Dissimilar action of tamoxifen and 4-hydroxytamoxifen on phosphatidylcholine model membranes. Biophys Chem 2021; 278:106681. [PMID: 34530285 DOI: 10.1016/j.bpc.2021.106681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/03/2021] [Accepted: 09/06/2021] [Indexed: 11/19/2022]
Abstract
The anticancer drug tamoxifen and its primary metabolite 4-hydroxytamoxifen tend to accumulate in membranes due to its strong hydrophobic character. Thus, in this work we have carried out a systematic study to investigate their effects on model phosphatidylcholine membranes. Tamoxifen and 4-hydroxytamoxifen affect the phase behaviour of phosphatidylcholine model membranes, giving rise to formation of drug/dipalmitoylphosphatidylcholine domains, which is more evident in the case of 4-hydroxytamoxifen. These drugs have differential effects on the polar and apolar regions of the phospholipid supporting a different location of both compounds within the bilayer. Both compounds induce contents leakage in fluid phosphatidylcholine unilamellar liposomes, the effect of 4-hydroxytamoxifen being negligible as compared to that of tamoxifen. Molecular dynamics confirmed the tendency of both drugs to form clusters, tamoxifen locating all along the bilayer, whereas 4-hydroxytamoxifen mostly locates near the lipid/water interface, which can explain the different effects of both drugs in fluid phosphatidylcholine membranes.
Collapse
Affiliation(s)
- Julia Ortiz
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Francisco J Aranda
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - José A Teruel
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Antonio Ortiz
- Departamento de Bioquímica y Biología Molecular-A, Facultad de Veterinaria, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain.
| |
Collapse
|
16
|
Liao Y, Li Z, Zhou Q, Sheng M, Qu Q, Shi Y, Yang J, Lv L, Dai X, Shi X. Saponin surfactants used in drug delivery systems: A new application for natural medicine components. Int J Pharm 2021; 603:120709. [PMID: 33992714 DOI: 10.1016/j.ijpharm.2021.120709] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 12/16/2022]
Abstract
Saponins are a group of compounds widely distributed in the plant kingdom. Due to their amphiphilic characteristic structure, saponins have high surface activity and self-assembly property and can be used as natural biosurfactants. Therefore, saponin has become a potential drug delivery system (DDS) carrier and has attracted the attention of many researchers. Increasing studies have found that when drugs combining with saponins, their solubility or bioavailability are improved. This phenomenon may be due to a synergistic mechanism and provides a potentially novel concept for DDS: saponins may be also used for carrier materials. This review emphasized the molecular characteristics and mechanism of saponins as carriers and the research on the morphology of saponin carriers. Besides, the article also introduced the role and application of saponins in DDS. Although there are still some limitations with the application of saponins such as cost, applicability, and hemolysis, the development of technology and in-depth molecular mechanism research will provide saponins with greater application prospects as DDS carriers.
Collapse
Affiliation(s)
- Yuyao Liao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Zhixun Li
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Qing Zhou
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Mengke Sheng
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Qingsong Qu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Yanshuang Shi
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Jiaqi Yang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Lijing Lv
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Xingxing Dai
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China; Key Laboratory for Production Process Control and Quality Evaluation of Traditional Chinese Medicine, Beijing Municipal Science & Technology Commission, Beijing 102488, China.
| | - Xinyuan Shi
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China; Key Laboratory for Production Process Control and Quality Evaluation of Traditional Chinese Medicine, Beijing Municipal Science & Technology Commission, Beijing 102488, China.
| |
Collapse
|
17
|
Cytotoxicity of Quillaja saponaria Saponins towards Lung Cells Is Higher for Cholesterol-Rich Cells. BIOPHYSICA 2021. [DOI: 10.3390/biophysica1020010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The purpose of the study was to compare cytotoxicity of two Quillaja saponaria bark saponin (QBS) mixtures against two lung cell lines: normal MRC-5 fibroblast cell line and tumor A-549 epithelial cells of lungs’ alveoli. The study, performed both at a macro-scale and in a dedicated microfluidic device, showed that QBS was more toxic to the cell line more abundant in cholesterol (MRC-5). The QBS mixture with higher saponin fraction was found to be more cytotoxic towards both cell lines. The results may help to better understand the cytotoxicity of saponin-rich herbal medicines towards normal and tumor cells depending on their cholesterol content.
Collapse
|
18
|
Is the Membrane Lipid Matrix a Key Target for Action of Pharmacologically Active Plant Saponins? Int J Mol Sci 2021; 22:ijms22063167. [PMID: 33804648 PMCID: PMC8003763 DOI: 10.3390/ijms22063167] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/28/2021] [Accepted: 03/18/2021] [Indexed: 11/25/2022] Open
Abstract
This study was focused on the molecular mechanisms of action of saponins and related compounds (sapogenins and alkaloids) on model lipid membranes. Steroids and triterpenes were tested. A systematic analysis of the effects of these chemicals on the physicochemical properties of the lipid bilayers and on the formation and functionality of the reconstituted ion channels induced by antimicrobial agents was performed. It was found that digitonin, tribulosin, and dioscin substantially reduced the boundary potential of the phosphatidylcholine membranes. We concluded that saponins might affect the membrane boundary potential by restructuring the membrane hydration layer. Moreover, an increase in the conductance and lifetime of gramicidin A channels in the presence of tribulosin was due to an alteration in the membrane dipole potential. Differential scanning microcalorimetry data indicated the key role of the sapogenin core structure (steroid or triterpenic) in affecting lipid melting and disordering. We showed that an alteration in pore forming activity of syringomycin E by dioscin might be due to amendments in the lipid packing. We also found that the ability of saponins to disengage the fluorescent marker calcein from lipid vesicles might be also determined by their ability to induce a positive curvature stress.
Collapse
|
19
|
Huangteerakul C, Aung HM, Thosapornvichai T, Duangkaew M, Jensen AN, Sukrong S, Ingkaninan K, Jensen LT. Chemical-Genetic Interactions of Bacopa monnieri Constituents in Cells Deficient for the DNA Repair Endonuclease RAD1 Appear Linked to Vacuolar Disruption. Molecules 2021; 26:1207. [PMID: 33668176 PMCID: PMC7956252 DOI: 10.3390/molecules26051207] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/18/2021] [Accepted: 02/22/2021] [Indexed: 01/18/2023] Open
Abstract
Colorectal cancer is a common cancer worldwide and reduced expression of the DNA repair endonuclease XPF (xeroderma pigmentosum complementation group F) is associated with colorectal cancer. Bacopa monnieri extracts were previously found to exhibit chemical-genetic synthetic lethal effects in a Saccharomyces cerevisiae model of colorectal cancer lacking Rad1p, a structural and functional homologue of human XPF. However, the mechanisms for B. monnieri extracts to limit proliferation and promote an apoptosis-like event in RAD1 deleted yeast was not elucidated. Our current analysis has revealed that B. monnieri extracts have the capacity to promote mutations in rad1∆ cells. In addition, the effects of B. monnieri extracts on rad1∆ yeast is linked to disruption of the vacuole, similar to the mammalian lysosome. The absence of RAD1 in yeast sensitizes cells to the effects of vacuole disruption and the release of proteases. The combined effect of increased DNA mutations and release of vacuolar contents appears to induce an apoptosis-like event that is dependent on the meta-caspase Yca1p. The toxicity of B. monnieri extracts is linked to sterol content, suggesting saponins may be involved in limiting the proliferation of yeast cells. Analysis of major constituents from B. monnieri identified a chemical-genetic interaction between bacopasaponin C and rad1∆ yeast. Bacopasaponin C may have potential as a drug candidate or serve as a model for the development of analogs for the treatment of colorectal cancer.
Collapse
Affiliation(s)
- Chananya Huangteerakul
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; (C.H.); (H.M.A.); (T.T.)
| | - Hsu Mon Aung
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; (C.H.); (H.M.A.); (T.T.)
| | - Thitipa Thosapornvichai
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; (C.H.); (H.M.A.); (T.T.)
| | - Marisa Duangkaew
- Toxicology Graduate Program, Faculty of Science, Mahidol University, Bangkok 10400, Thailand;
| | - Amornrat Naranuntarat Jensen
- Department of Pathobiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand;
- Center of Excellence on Environmental Health and Toxicology (EHT), Bangkok 10400, Thailand
| | - Suchada Sukrong
- Research Unit of DNA Barcoding of Thai Medicinal Plants, Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10400, Thailand;
| | - Kornkanok Ingkaninan
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Center of Excellence for Innovation in Chemistry, Naresuan University, Phitsanulok 65000, Thailand;
| | - Laran T. Jensen
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; (C.H.); (H.M.A.); (T.T.)
| |
Collapse
|
20
|
Zhang M, Ye L, Huang H, Cheng D, Liu K, Wu W, Shen F, Jiang Z, Hou Y, Bai G. Micelles self-assembled by 3-O-β-D-glucopyranosyl latycodigenin enhance cell membrane permeability, promote antibiotic pulmonary targeting and improve anti-infective efficacy. J Nanobiotechnology 2020; 18:140. [PMID: 33008413 PMCID: PMC7532624 DOI: 10.1186/s12951-020-00699-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 09/24/2020] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Nanoparticle-based pulmonary drug delivery systems are commonly developed and applied for drug-targeted delivery. They exhibit significant advantages compared to traditional pulmonary drug delivery systems. However, developing the formulation of each drug is a time-consuming and laborious task. RESULTS In this study, a universal lung-targeting nanoparticle was designed and constructed. The self-assembled micelles were composed of a platycodon secondary saponin, 3-O-β-D-glucopyranosyl platycodigenin 682 (GP-682), based on its specific amphiphilic structure. The GP-682 micelles exhibited a relatively stable zeta potential with a particle size between 60 and 90 nm, and the critical micelle concentration (CMC) value was approximately 42.3 μg/mL. Preincubation of GP-682 micelles markedly enhanced their cell membrane permeability and improved drug uptake in vitro. The results were visualized using fluorescent dye tracing, transmission electron microscopy (TEM) observations and the lactate dehydrogenase (LDH) release assay. The obtained benefits enhanced the distribution of levofloxacin (Lev) in mouse lung tissue and reduced antibiotics overdosing. The acute lung injury mouse model induced by the Pseudomonas aeruginosa PA 14 strain demonstrated that preinjection of GP-682 micelles before antibiotic administration resulted in a higher survival rate and anti-infective efficacy in vivo. It also caused reductions in pulmonary injury, bacterial invasion and cytokine expression compared with treatment with Lev alone. CONCLUSIONS GP-682 micelles are another nanoparticle-based pulmonary drug delivery system and provide a new lung-targeting therapy option.
Collapse
Affiliation(s)
- Man Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Haihe Education Park, 38 Tongyan Road, Tianjin, 300353, People's Republic of China
| | - Lili Ye
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Haihe Education Park, 38 Tongyan Road, Tianjin, 300353, People's Republic of China
| | - Hao Huang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Taipa, Macau, China
| | - Dandan Cheng
- Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, People's Republic of China
| | - Kaixin Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Haihe Education Park, 38 Tongyan Road, Tianjin, 300353, People's Republic of China
| | - Wenbo Wu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Haihe Education Park, 38 Tongyan Road, Tianjin, 300353, People's Republic of China
| | - Fukui Shen
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Haihe Education Park, 38 Tongyan Road, Tianjin, 300353, People's Republic of China
| | - Zhihong Jiang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Taipa, Macau, China
| | - Yuanyuan Hou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Haihe Education Park, 38 Tongyan Road, Tianjin, 300353, People's Republic of China.
| | - Gang Bai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Haihe Education Park, 38 Tongyan Road, Tianjin, 300353, People's Republic of China.
| |
Collapse
|
21
|
Verstraeten SL, Lorent JH, Mingeot-Leclercq MP. Lipid Membranes as Key Targets for the Pharmacological Actions of Ginsenosides. Front Pharmacol 2020; 11:576887. [PMID: 33041822 PMCID: PMC7518029 DOI: 10.3389/fphar.2020.576887] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 08/18/2020] [Indexed: 12/27/2022] Open
Abstract
In this review, we will focus on the activity of ginsenosides on membranes and their related effects, from physicochemical, biophysical, and pharmacological viewpoints. Ginsenosides are a class of saponins with a large structural diversity and a wide range of pharmacological effects. These effects can at least partly be related to their activity on membranes which results from their amphiphilic character. Some ginsenosides are able to interact with membrane lipids and associate into nanostructures, making them possible adjuvants for vaccines. They are able to modulate membrane biophysical properties such as membrane fluidity, permeability or the formation of lateral domains with some degree of specificity towards certain cell types such as bacteria, fungi, or cancer cells. In addition, they have shown antioxidant properties which protect membranes from lipid oxidation. They further displayed some activity on membrane proteins either through direct or indirect interaction. We investigate the structure activity relationship of ginsenosides on membranes and discuss the implications and potential use as anticancer, antibacterial, and antifungal agents.
Collapse
Affiliation(s)
- Sandrine L Verstraeten
- Cellular & Molecular Pharmacology Unit (FACM), Louvain Drug Research Institute (LDRI), Université Catholique de Louvain (UCL), Brussels, Belgium
| | - Joseph H Lorent
- Cellular & Molecular Pharmacology Unit (FACM), Louvain Drug Research Institute (LDRI), Université Catholique de Louvain (UCL), Brussels, Belgium.,Membrane Biochemistry & Biophysics, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Marie-Paule Mingeot-Leclercq
- Cellular & Molecular Pharmacology Unit (FACM), Louvain Drug Research Institute (LDRI), Université Catholique de Louvain (UCL), Brussels, Belgium
| |
Collapse
|
22
|
Behuria HG, Sahu SK. An Anti-microbial Terpenoid Fraction from Gymnema sylvestre Induces Flip-flop of Fluorescent-Phospholipid Analogs in Model Membrane. Appl Biochem Biotechnol 2020; 192:1331-1345. [PMID: 32743703 DOI: 10.1007/s12010-020-03399-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 07/16/2020] [Indexed: 12/25/2022]
Abstract
Therapeutic potential of Gymnema sylvestre on diverse cell types is predominantly due to a variety of terpenoids and their derivatives. However, their bioavailability becomes limited due to poor solubility and lower lipophilic properties, provoking the search for novel membranotropic terpenoids and their mechanism of action. A terpenoid fraction purified from Gymnema sylvestre exhibited broad spectrum antimicrobial activity against both Gram positive and Gram negative bacteria with IC50 ˂ 0.1 mg/ml. Evaluation of its membranotropic effect in vitro on reconstituted model membrane revealed that the fraction induced flip-flop of fluorescent phospholipid analogs across the lipid bilayer. The terpenoid-induced lipid flipping was biphasic with a fast linear phase (rate constant (k1) = 3 to 5 S-1) and a second slow exponential phase (rate constant (k2) = (4 to 9) × 10-3 S-1). The lipid-flippase activity of the terpenoid fraction showed concentration and incubation-dependent cooperativity, indicating their lipophilic nature and membrane-destabilizing activity that facilitated lipid translocation. For the first time, our study reveals the flippase activity of a terpenoid fraction of Gymnema sylvestre that could be further explored for their membrane-mediated pharmacological properties. Graphical Abstract.
Collapse
Affiliation(s)
- Himadri Gourav Behuria
- Department of Biotechnology, North Orissa University, Mayurbhanj, Baripada, Odisha, 757003, India
| | - Santosh Kumar Sahu
- Department of Biotechnology, North Orissa University, Mayurbhanj, Baripada, Odisha, 757003, India.
| |
Collapse
|
23
|
Glycyrrhizin-induced changes in phospholipid dynamics studied by 1H NMR and MD simulation. Arch Biochem Biophys 2020; 686:108368. [PMID: 32315654 DOI: 10.1016/j.abb.2020.108368] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/24/2020] [Accepted: 04/10/2020] [Indexed: 11/20/2022]
Abstract
Phospholipid bilayer constitutes the basis of the cell membrane. Any changes in its structure and dynamics could significantly affect the properties and functions of the cell membrane and associated proteins. It could, in its turn, affect the mechanism and strength of drug-membrane interaction. Phase transitions in lipid bilayer play an important role in cell life and in transmembrane transport of ions and drug molecules. In the present study we have tried to clarify the mechanism of glycyrrhizin bioactivity by the study of its influence on the lipid dynamics and phase transition of the lipid bilayer. For this purpose, a combination of nuclear magnetic resonance (NMR) and molecular dynamic (MD) simulations was used. Glycyrrhizin is the saponin extracted from licorice root. It displays a wide spectrum of biological activity and is frequently used in traditional medicine since ancient times. Now glycyrrhizin attracts additional attention as a novel multifunctional drug delivery system. We have established that glycyrrhizin interaction with dipalmitoylphosphatidylcholine lipid bilayers leads to changes in lipid mobility and phase transition temperature. NMR and MD results demonstrated that a glycyrrhizin molecule is able to integrate into a lipid bilayer and form stable aggregates inside. We hypothesize that surface curvatures caused by local changes in the lipid composition and the presence of phase boundaries might affect the permeability of the cell membrane.
Collapse
|
24
|
Enhancing the Membranolytic Activity of Chenopodium quinoa Saponins by Fast Microwave Hydrolysis. Molecules 2020; 25:molecules25071731. [PMID: 32283763 PMCID: PMC7181122 DOI: 10.3390/molecules25071731] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 11/19/2022] Open
Abstract
Saponins are plant secondary metabolites. There are associated with defensive roles due to their cytotoxicity and are active against microorganisms. Saponins are frequently targeted to develop efficient drugs. Plant biomass containing saponins deserves sustained interest to develop high-added value applications. A key issue when considering the use of saponins for human healthcare is their toxicity that must be modulated before envisaging any biomedical application. This can only go through understanding the saponin-membrane interactions. Quinoa is abundantly consumed worldwide, but the quinoa husk is discarded due to its astringent taste associated with its saponin content. Here, we focus on the saponins of the quinoa husk extract (QE). We qualitatively and quantitively characterized the QE saponins using mass spectrometry. They are bidesmosidic molecules, with two oligosaccharidic chains appended on the aglycone with two different linkages; a glycosidic bond and an ester function. The latter can be hydrolyzed to prepare monodesmosidic molecules. The microwave-assisted hydrolysis reaction was optimized to produce monodesmosidic saponins. The membranolytic activity of the saponins was assayed based on their hemolytic activity that was shown to be drastically increased upon hydrolysis. In silico investigations confirmed that the monodesmosidic saponins interact preferentially with a model phospholipid bilayer, explaining the measured increased hemolytic activity.
Collapse
|
25
|
Malabed R, Hanashima S, Murata M, Sakurai K. Interactions of OSW-1 with Lipid Bilayers in Comparison with Digitonin and Soyasaponin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3600-3610. [PMID: 32160747 DOI: 10.1021/acs.langmuir.9b03957] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
OSW-1, a unique steroidal saponin isolated from the bulbs of Ornithogalum saundersiae, has potent cell-growth inhibition activity. In this study, we conducted fluorescence measurements and microscopic observations using palmitoyloleoylphosphatidylcholine (POPC)-cholesterol (Chol) bilayers to evaluate the membrane-binding affinity of OSW-1 in comparison with another steroidal saponin, digitonin, and the triterpenoid saponin, soyasaponin Bb(I). The membrane activities of these saponins were evaluated using calcein leakage assays and fitted to the binding isotherm by changing the ratios of saponin-lipids. Digitonin showed the highest binding affinity for the POPC-Chol membrane (Kapp = 0.38 μM-1) and the strongest membrane disruptivity in the bound saponin-lipid ratio at the point of 50% calcein leakage (r50 = 0.47) occurrence. OSW-1 showed slightly lower activity (Kapp = 0.31 μM-1; r50 = 0.78), and the soyasaponin was the lowest in the membrane affinity and the calcein leakage activity (Kapp = 0.017 μM-1; r50 = 1.66). The effect of OSW-1 was further assessed using confocal microscopy in an experiment utilizing DiI and rhodamine 6G as the fluorescence probes. The addition of 30 μM OSW-1 induced inward membrane curvature in some giant unilamellar vesicles (GUVs). At the higher OSW-1 concentration (58 μM, r50 = 0.78) where the 50% calcein leakage was observed, the morphology of some GUVs became elongated. With digitonin at the corresponding concentration (35 μM, r50 = 0.47), membrane disruption and formation of large aggregates in aqueous solution were observed, probably due to a detergent-type mechanism. These saponins, including OSW-1, required Chol to exhibit their potent membrane activity although their mechanisms are thought to be different. At the effective concentration, OSW-1 preferably binds to the bilayers without prominent disruption of vesicles and exerts its activity through the formation of saponin-Chol complexes, probably resulting in membrane permeabilization.
Collapse
Affiliation(s)
- Raymond Malabed
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- ERATO, Lipid Active Structure Project, Japan Science and Technology Agency, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Shinya Hanashima
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- ERATO, Lipid Active Structure Project, Japan Science and Technology Agency, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kaori Sakurai
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan
| |
Collapse
|
26
|
Kamyab E, Goebeler N, Kellermann MY, Rohde S, Reverter M, Striebel M, Schupp PJ. Anti-Fouling Effects of Saponin-Containing Crude Extracts from Tropical Indo-Pacific Sea Cucumbers. Mar Drugs 2020; 18:E181. [PMID: 32244281 PMCID: PMC7231054 DOI: 10.3390/md18040181] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 12/21/2022] Open
Abstract
Sea cucumbers are bottom dwelling invertebrates, which are mostly found on subtropical and tropical sea grass beds, sandy reef flats, or reef slopes. Although constantly exposed to fouling communities in these habitats, many species are surprisingly free of invertebrate epibionts and microfouling algae such as diatoms. In our study, we investigated the anti-fouling (AF) activities of different crude extracts of tropical Indo-Pacific sea cucumber species against the fouling diatom Cylindrotheca closterium. Nine sea cucumber species from three genera (i.e., Holothuria, Bohadschia, Actinopyga) were selected and extracted to assess their AF activities. To verify whether the sea cucumber characteristic triterpene glycosides were responsible for the observed potent AF activities, we tested purified fractions enriched in saponins isolated from Bohadschia argus, representing one of the most active anti-fouling extracts. Saponins were quantified by vanillin-sulfuric acid colorimetric assays and identified by LC-MS and LC-MS/MS analyses. We were able to demonstrate that AF activities in sea cucumber extracts were species-specific, and growth inhibition as well as attachment of the diatom to surfaces is dependent on the saponin concentration (i.e., Actinopyga contained the highest quantities), as well as on the molecular composition and structure of the present saponins (i.e., Bivittoside D derivative was the most bioactive compound). In conclusion, the here performed AF assay represents a promising and fast method for selecting the most promising bioactive organism as well as for identifying novel compounds with potent AF activities for the discovery of potentially novel pharmacologically active natural products.
Collapse
Affiliation(s)
- Elham Kamyab
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany; (N.G.); (M.Y.K.); (S.R.); (M.R.); (M.S.)
| | - Norman Goebeler
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany; (N.G.); (M.Y.K.); (S.R.); (M.R.); (M.S.)
- Tvärminne Zoological Station, University of Helsinki, J.A. Palmènin tie 260, 10900 Hanko, Finland
| | - Matthias Y. Kellermann
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany; (N.G.); (M.Y.K.); (S.R.); (M.R.); (M.S.)
| | - Sven Rohde
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany; (N.G.); (M.Y.K.); (S.R.); (M.R.); (M.S.)
| | - Miriam Reverter
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany; (N.G.); (M.Y.K.); (S.R.); (M.R.); (M.S.)
| | - Maren Striebel
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany; (N.G.); (M.Y.K.); (S.R.); (M.R.); (M.S.)
| | - Peter J. Schupp
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany; (N.G.); (M.Y.K.); (S.R.); (M.R.); (M.S.)
- Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), Ammerländer Heerstrasse 231, D-26129 Oldenburg, Germany
| |
Collapse
|
27
|
Liposomal membrane permeability assessment by fluorescence techniques: Main permeabilizing agents, applications and challenges. Int J Pharm 2020; 580:119198. [PMID: 32169353 DOI: 10.1016/j.ijpharm.2020.119198] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/19/2020] [Accepted: 03/02/2020] [Indexed: 01/08/2023]
Abstract
Liposomes are lipid vesicles made of one or multiple lipid bilayers surrounding an internal aqueous core. They are broadly employed as models to study membrane structure and properties. Among these properties, liposome membrane permeability is crucial and widely assessed by fluorescence techniques. The first part of this review is devoted to describe the various techniques used for membrane permeability assessment. Attention is paid to fluorescence techniques based on vesicle leakage of self-quenching probes, dye/quencher pair or cation/ligand pair. Secondly, the membrane-active agents inducing membrane permeabilization is presented and details on their mechanisms of action are given. Emphasis is also laid on the intrinsic and extrinsic factors that can modulate the membrane permeability. Hence, a suitable liposomal membrane should be formulated according to the aim of the study and its application.
Collapse
|
28
|
Yakovishin LA, Grishkovets VI. Molecular Complexes of Ivy Triterpene Glycosides with Cholesterol. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162019070136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
29
|
Adamska A, Stefanowicz-Hajduk J, Ochocka JR. Alpha-Hederin, the Active Saponin of Nigella sativa, as an Anticancer Agent Inducing Apoptosis in the SKOV-3 Cell Line. Molecules 2019; 24:molecules24162958. [PMID: 31443189 PMCID: PMC6719954 DOI: 10.3390/molecules24162958] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/10/2019] [Accepted: 08/13/2019] [Indexed: 12/31/2022] Open
Abstract
Alpha-hederin (α-HN), a pentacyclic triterpene saponin, has recently been identified as one of the active compounds of Nigella sativa, as a potential anticancer agent. However, no extensive studies on α-HN have been done as yet, as it was in the case of thymoquinone—the main ingredient of the N.sativa essential oil. To our knowledge, there are also no data available on how α-HN acts on the human cancer ovarian cell line SKOV-3. In this study we attempt to present the cytotoxic influence of α-HN on the SKOV-3 cell line by means of two methods: Real-Time xCELLigence and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The obtained IC50 values are 2.62 ± 0.04 μg/mL and 2.48 ± 0.32 μg/mL, respectively. An induction of apoptosis in SKOV-3 cells was confirmed by staining cellular nuclei with Hoechst 33342 dye and by flow cytometry analysis by binding annexin V to the cell membranes. We found that α-HN induces apoptosis in a dose-dependent manner. In the first stages of apoptosis, the mitochondrial membrane potential was found to decrease. Also, inactivation of anti-apoptotic protein Bcl-2 was observed, as well as the caspase-9 and then caspase-3/7 activation. In addition, the treatment of SKOV-3 cells with α-HN induced the cell cycle arrest of cancer cells in G0/G1 phase. The results of our investigations indicate that α-HN induces apoptosis in the SKOV-3 cell line and that the intrinsic mitochondrial pathway is involved in the programmed cancer cell death.
Collapse
Affiliation(s)
- Anna Adamska
- Department of Biology and Pharmaceutical Botany, Medical University of Gdańsk, Al. Hallera 107, 80-416 Gdańsk, Poland.
| | - Justyna Stefanowicz-Hajduk
- Department of Biology and Pharmaceutical Botany, Medical University of Gdańsk, Al. Hallera 107, 80-416 Gdańsk, Poland
| | - J Renata Ochocka
- Department of Biology and Pharmaceutical Botany, Medical University of Gdańsk, Al. Hallera 107, 80-416 Gdańsk, Poland.
| |
Collapse
|
30
|
Verstraeten SL, Deleu M, Janikowska-Sagan M, Claereboudt EJS, Lins L, Tyteca D, Mingeot-Leclercq MP. The activity of the saponin ginsenoside Rh2 is enhanced by the interaction with membrane sphingomyelin but depressed by cholesterol. Sci Rep 2019; 9:7285. [PMID: 31086211 PMCID: PMC6513819 DOI: 10.1038/s41598-019-43674-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 04/12/2019] [Indexed: 01/12/2023] Open
Abstract
The membrane activity of some saponins, such as digitonin or alpha-hederin, is usually attributed to their interaction with membrane cholesterol (Chol). This contrasts with our recent publication showing that Chol, contrary to sphingomyelin (SM), can delay the cytotoxicity of the saponin ginsenoside Rh2, challenging the usual view that most saponins mediate their membrane effects through interaction with Chol. The aim of the present study was to elucidate the respective importance of Chol and SM as compared to phosphatidylcholine (PC) species in the membrane-related effects of Rh2. On simple lipid monolayers, Rh2 interacted more favorably with eggSM and DOPC than with Chol and eggPC. Using Large Unilamellar Vesicles (LUVs) of binary or ternary lipid compositions, we showed that Rh2 increased vesicle size, decreased membrane fluidity and induced membrane permeability with the following preference: eggSM:eggPC > eggSM:eggPC:Chol > eggPC:Chol. On Giant Unilamellar Vesicles (GUVs), we evidenced that Rh2 generated positive curvatures in eggSM-containing GUVs and small buds followed by intra-luminal vesicles in eggSM-free GUVs. Altogether, our data indicate that eggSM promotes and accelerates membrane-related effects induced by Rh2 whereas Chol slows down and depresses these effects. This study reconsiders the theory that Chol is the only responsible for the activity of saponins.
Collapse
|
31
|
Jeong KB, Luo K, Lee H, Lim MC, Yu J, Choi SJ, Kim KB, Jeon TJ, Kim YR. Alpha-Hederin Nanopore for Single Nucleotide Discrimination. ACS NANO 2019; 13:1719-1727. [PMID: 30657663 DOI: 10.1021/acsnano.8b07797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Various types of biological and synthetic nanopores have been developed and utilized for the high-throughput investigation of individual biomolecules. Biological nanopores made with channel proteins are so far superior to solid-state ones in terms of sensitivity and reproducibility. However, the performance of a biological nanopore is dependent on the protein in the channel structure its dimensions are predetermined and are difficult to modify for broader applications. Here inspired by the cytotoxic mechanisms of a saponin derivative, alpha-hederin, we report a nonproteinaceous nanopore that can be formed spontaneously in a lipid membrane. We propose the pore-forming mechanism of alpha-hederin in a cholesterol-rich lipid membrane and a strategy to control the pore-forming rate by a lipid partitioning method. The small diameter and effective thickness of alpha-hederin nanopores enabled us to discriminate ssDNA homopolymers as well as four types of nucleotides, showing its potential as a DNA sequencing tool.
Collapse
Affiliation(s)
- Ki-Baek Jeong
- Graduate School of Biotechnology and Department of Food Science and Biotechnology , Kyung Hee University , Yongin 17104 , Republic of Korea
| | - Ke Luo
- Graduate School of Biotechnology and Department of Food Science and Biotechnology , Kyung Hee University , Yongin 17104 , Republic of Korea
| | - Hwankyu Lee
- Department of Chemical Engineering , Dankook University , Yongin 16891 , Republic of Korea
| | - Min-Cheol Lim
- Research Group of Food Safety , Korea Food Research Institute , 245, Nongsaengmyeong-ro , Iseo-myeon, Wanju-gun , Jeollabuk-do 55365 , Republic of Korea
| | - Jin Yu
- Department of Applied Food System, Major of Food Science & Technology , Seoul Women's University , Seoul 01797 , Republic of Korea
| | - Soo-Jin Choi
- Department of Applied Food System, Major of Food Science & Technology , Seoul Women's University , Seoul 01797 , Republic of Korea
| | - Ki-Bum Kim
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Republic of Korea
| | - Tae-Joon Jeon
- Department of Biological Engineering , Inha University , Incheon 22212 , Republic of Korea
| | - Young-Rok Kim
- Graduate School of Biotechnology and Department of Food Science and Biotechnology , Kyung Hee University , Yongin 17104 , Republic of Korea
| |
Collapse
|
32
|
Konetski D, Baranek A, Mavila S, Zhang X, Bowman CN. Formation of lipid vesicles in situ utilizing the thiol-Michael reaction. SOFT MATTER 2018; 14:7645-7652. [PMID: 30175341 DOI: 10.1039/c8sm01329b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Synthetic unilamellar liposomes, functionalized to enable novel characteristics and behavior, are of great utility to fields such as drug delivery and artificial cell membranes. However, the generation of these liposomes is frequently highly labor-intensive and time consuming whereas in situ liposome formation presents a potential solution to this problem. A novel method for in situ lipid formation is developed here through the covalent addition of a thiol-functionalized lysolipid to an acrylate-functionalized tail via the thiol-Michael addition reaction with potential for inclusion of additional functionality via the tail. Dilute, stoichiometric mixtures of a thiol lysolipid and an acrylate tail reacted in an aqueous media at ambient conditions for 48 hours reached nearly 90% conversion, forming the desired thioether-containing phospholipid product. These lipids assemble into a high density of liposomes with sizes ranging from 20 nm to several microns in diameter and include various structures ranging from spheres to tubular vesicles with structure and lamellarity dependent upon the catalyst concentration used. To demonstrate lipid functionalization, an acrylate tail possessing a terminal alkyne was coupled into the lipid structure. These functionalized liposomes enable photo-induced polymerization of the terminal alkyne upon irradiation.
Collapse
Affiliation(s)
- Danielle Konetski
- Department of Chemical and Biological Engineering, University of Colorado, 3415 Colorado Avenue, JSC Biotech Building, Boulder, Colorado 80303, USA.
| | | | | | | | | |
Collapse
|
33
|
Góral I, Jurek I, Wojciechowski K. How Does the Surface Activity of Soapwort (Saponaria officinalisL.) Extracts Depend on the Plant Organ? J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12198] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Ilona Góral
- SaponLabs Ltd., Noakowskiego 3; 00-664 Warsaw Poland
- Faculty of Chemistry; Warsaw University of Technology, Noakowskiego 3; 00-664 Warsaw Poland
| | - Ilona Jurek
- Faculty of Chemistry; Warsaw University of Technology, Noakowskiego 3; 00-664 Warsaw Poland
| | - Kamil Wojciechowski
- SaponLabs Ltd., Noakowskiego 3; 00-664 Warsaw Poland
- Faculty of Chemistry; Warsaw University of Technology, Noakowskiego 3; 00-664 Warsaw Poland
| |
Collapse
|
34
|
Stewart MP, Langer R, Jensen KF. Intracellular Delivery by Membrane Disruption: Mechanisms, Strategies, and Concepts. Chem Rev 2018; 118:7409-7531. [PMID: 30052023 PMCID: PMC6763210 DOI: 10.1021/acs.chemrev.7b00678] [Citation(s) in RCA: 382] [Impact Index Per Article: 63.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Intracellular delivery is a key step in biological research and has enabled decades of biomedical discoveries. It is also becoming increasingly important in industrial and medical applications ranging from biomanufacture to cell-based therapies. Here, we review techniques for membrane disruption-based intracellular delivery from 1911 until the present. These methods achieve rapid, direct, and universal delivery of almost any cargo molecule or material that can be dispersed in solution. We start by covering the motivations for intracellular delivery and the challenges associated with the different cargo types-small molecules, proteins/peptides, nucleic acids, synthetic nanomaterials, and large cargo. The review then presents a broad comparison of delivery strategies followed by an analysis of membrane disruption mechanisms and the biology of the cell response. We cover mechanical, electrical, thermal, optical, and chemical strategies of membrane disruption with a particular emphasis on their applications and challenges to implementation. Throughout, we highlight specific mechanisms of membrane disruption and suggest areas in need of further experimentation. We hope the concepts discussed in our review inspire scientists and engineers with further ideas to improve intracellular delivery.
Collapse
Affiliation(s)
- Martin P. Stewart
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
- The Koch Institute for Integrative Cancer Research,
Massachusetts Institute of Technology, Cambridge, USA
| | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
- The Koch Institute for Integrative Cancer Research,
Massachusetts Institute of Technology, Cambridge, USA
| | - Klavs F. Jensen
- Department of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, USA
| |
Collapse
|
35
|
Claereboudt EJS, Eeckhaut I, Lins L, Deleu M. How different sterols contribute to saponin tolerant plasma membranes in sea cucumbers. Sci Rep 2018; 8:10845. [PMID: 30022094 PMCID: PMC6052070 DOI: 10.1038/s41598-018-29223-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 05/25/2018] [Indexed: 12/22/2022] Open
Abstract
Sea cucumbers produce saponins as a chemical defense mechanism, however their cells can tolerate the cytotoxic nature of these chemicals. To elucidate the molecular mechanisms behind this tolerance a suite of complementary biophysical tools was used, firstly using liposomes for in vitro techniques then using in silico approaches for a molecular-level insight. The holothuroid saponin Frondoside A, caused significantly less permeabilization in liposomes containing a Δ7 holothuroid sterol than those containing cholesterol and resulted in endothermic interactions versus exothermic interactions with cholesterol containing liposomes. Lipid phases simulations revealed that Frondoside A has an agglomerating effect on cholesterol domains, however, induced small irregular Δ7 sterol clusters. Our results suggest that the structural peculiarities of holothuroid sterols provide sea cucumbers with a mechanism to mitigate the sterol-agglomerating effect of saponins, and therefore to protect their cells from the cytotoxicity of the saponins they produce.
Collapse
Affiliation(s)
- Emily J S Claereboudt
- Biology of marine organisms and biomimetics, Research Institute for Biosciences, University of Mons, B-7000, Mons, Belgium
- Laboratory of molecular biophysics of interfaces, Gembloux Agro-Bio Tech, University of Liege, B-5030, Gembloux, Belgium
| | - Igor Eeckhaut
- Biology of marine organisms and biomimetics, Research Institute for Biosciences, University of Mons, B-7000, Mons, Belgium
| | - Laurence Lins
- Laboratory of molecular biophysics of interfaces, Gembloux Agro-Bio Tech, University of Liege, B-5030, Gembloux, Belgium
| | - Magali Deleu
- Laboratory of molecular biophysics of interfaces, Gembloux Agro-Bio Tech, University of Liege, B-5030, Gembloux, Belgium.
| |
Collapse
|
36
|
Nicol A, Kwok RTK, Chen C, Zhao W, Chen M, Qu J, Tang BZ. Ultrafast Delivery of Aggregation-Induced Emission Nanoparticles and Pure Organic Phosphorescent Nanocrystals by Saponin Encapsulation. J Am Chem Soc 2017; 139:14792-14799. [PMID: 28960975 DOI: 10.1021/jacs.7b08710] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Saponins are a class of naturally occurring bioactive and biocompatible amphiphilic glycosides produced by plants. Some saponins, such as α-hederin, exhibit unique cell membrane interactions. At concentrations above their critical micelle concentration, they will interact and aggregate with membrane cholesterol to form transient pores in the cell membrane. In this project, we utilized the unique permeabilization and amphiphilic properties of saponins for the intracellular delivery of deep-red-emitting aggregation-induced emission nanoparticles (AIE NPs) and pure organic room-temperature phosphorescent nanocrystals (NCs). We found this method to be biocompatible, inexpensive, ultrafast, and applicable to deliver a wide variety of AIE NPs and NCs into cancer cells.
Collapse
Affiliation(s)
- Alexander Nicol
- Division of Biomedical Engineering, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology (HKUST) , Clear Water Bay, Kowloon, Hong Kong 999077, China.,HKUST-Shenzhen Research Institute No. 9 Yuexing First Road, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Ryan T K Kwok
- Division of Biomedical Engineering, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology (HKUST) , Clear Water Bay, Kowloon, Hong Kong 999077, China.,HKUST-Shenzhen Research Institute No. 9 Yuexing First Road, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Congping Chen
- Department of Electronic and Computer Engineering, HKUST , Clear Water Bay Kowloon, Hong Kong 999077, China
| | - Weijun Zhao
- Division of Biomedical Engineering, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology (HKUST) , Clear Water Bay, Kowloon, Hong Kong 999077, China.,HKUST-Shenzhen Research Institute No. 9 Yuexing First Road, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Ming Chen
- Division of Biomedical Engineering, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology (HKUST) , Clear Water Bay, Kowloon, Hong Kong 999077, China.,HKUST-Shenzhen Research Institute No. 9 Yuexing First Road, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Jianan Qu
- Department of Electronic and Computer Engineering, HKUST , Clear Water Bay Kowloon, Hong Kong 999077, China
| | - Ben Zhong Tang
- Division of Biomedical Engineering, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology (HKUST) , Clear Water Bay, Kowloon, Hong Kong 999077, China.,HKUST-Shenzhen Research Institute No. 9 Yuexing First Road, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China.,Guangdong Innovative Research Team, SCUT-HKUST Joint Research Laboratory, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| |
Collapse
|
37
|
Malabed R, Hanashima S, Murata M, Sakurai K. Sterol-recognition ability and membrane-disrupting activity of Ornithogalum saponin OSW-1 and usual 3-O-glycosyl saponins. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:2516-2525. [PMID: 28947142 DOI: 10.1016/j.bbamem.2017.09.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 09/05/2017] [Accepted: 09/18/2017] [Indexed: 12/14/2022]
Abstract
OSW-1 is a structurally unique steroidal saponin isolated from the bulbs of Ornithogalum saundersiae, and has exhibited highly potent and selective cytotoxicity in tumor cell lines. This study aimed to investigate the molecular mechanism for the membrane-permeabilizing activity of OSW-1 in comparison with those of other saponins by using various spectroscopic approaches. The membrane effects and hemolytic activity of OSW-1 were markedly enhanced in the presence of membrane cholesterol. Binding affinity measurements using fluorescent cholestatrienol and solid-state NMR spectroscopy of a 3-d-cholesterol probe suggested that OSW-1 interacts with membrane cholesterol without forming large aggregates while 3-O-glycosyl saponin, digitonin, forms cholesterol-containing aggregates. The results suggest that OSW-1/cholesterol interaction is likely to cause membrane permeabilization and pore formation without destroying the whole membrane integrity, which could partly be responsible for its highly potent cell toxicity.
Collapse
Affiliation(s)
- Raymond Malabed
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan; ERATO, Lipid Active Structure Project, Japan Science and Technology Agency, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Shinya Hanashima
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan; ERATO, Lipid Active Structure Project, Japan Science and Technology Agency, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
| | - Kaori Sakurai
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan
| |
Collapse
|
38
|
Dos Santos AG, Bayiha JC, Dufour G, Cataldo D, Evrard B, Silva LC, Deleu M, Mingeot-Leclercq MP. Changes in membrane biophysical properties induced by the Budesonide/Hydroxypropyl-β-cyclodextrin complex. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017. [PMID: 28642042 DOI: 10.1016/j.bbamem.2017.06.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Budesonide (BUD), a poorly soluble anti-inflammatory drug, is used to treat patients suffering from asthma and COPD (Chronic Obstructive Pulmonary Disease). Hydroxypropyl-β-cyclodextrin (HPβCD), a biocompatible cyclodextrin known to interact with cholesterol, is used as a drug-solubilizing agent in pharmaceutical formulations. Budesonide administered as an inclusion complex within HPβCD (BUD:HPβCD) required a quarter of the nominal dose of the suspension formulation and significantly reduced neutrophil-induced inflammation in a COPD mouse model exceeding the effect of each molecule administered individually. This suggests the role of lipid domains enriched in cholesterol for inflammatory signaling activation. In this context, we investigated the effect of BUD:HPβCD on the biophysical properties of membrane lipids. On cellular models (A549, lung epithelial cells), BUD:HPβCD extracted cholesterol similarly to HPβCD. On large unilamellar vesicles (LUVs), by using the fluorescent probes diphenylhexatriene (DPH) and calcein, we demonstrated an increase in membrane fluidity and permeability induced by BUD:HPβCD in vesicles containing cholesterol. On giant unilamellar vesicles (GUVs) and lipid monolayers, BUD:HPβCD induced the disruption of cholesterol-enriched raft-like liquid ordered domains as well as changes in lipid packing and lipid desorption from the cholesterol monolayers, respectively. Except for membrane fluidity, all these effects were enhanced when HPβCD was complexed with budesonide as compared with HPβCD. Since cholesterol-enriched domains have been linked to membrane signaling including pathways involved in inflammation processes, we hypothesized the effects of BUD:HPβCD could be partly mediated by changes in the biophysical properties of cholesterol-enriched domains.
Collapse
Affiliation(s)
- Andreia G Dos Santos
- Université catholique de Louvain, Louvain Drug Research Institute, Cellular and Molecular Pharmacology Unit, Avenue E. Mounier 73, B1.73.05, B-1200 Bruxelles, Belgium; Universidade de Lisboa, Faculdade de Farmácia, iMed.ULisboa - Research Institute for Medicines, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Jules César Bayiha
- Université catholique de Louvain, Louvain Drug Research Institute, Cellular and Molecular Pharmacology Unit, Avenue E. Mounier 73, B1.73.05, B-1200 Bruxelles, Belgium
| | - Gilles Dufour
- Université de Liège, CIRM, Laboratoire de Technologie Pharmaceutique et Biopharmacie, Avenue de l'Hôpital 3, B-4000 Liège, Belgium
| | - Didier Cataldo
- Université de Liège and CHU, Laboratory of Tumor & Development Biology (GIGA-Cancer), Avenue Hippocrate 13, B-4000 Liège, Belgium
| | - Brigitte Evrard
- Université de Liège, CIRM, Laboratoire de Technologie Pharmaceutique et Biopharmacie, Avenue de l'Hôpital 3, B-4000 Liège, Belgium
| | - Liana C Silva
- Universidade de Lisboa, Faculdade de Farmácia, iMed.ULisboa - Research Institute for Medicines, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Magali Deleu
- Université de Liège, Gembloux Agro Bio-Tech, Laboratoire de Biophysique Moléculaire aux Interfaces, Passage des Déportés, 2, B-5030 Gembloux, Belgium
| | - Marie-Paule Mingeot-Leclercq
- Université catholique de Louvain, Louvain Drug Research Institute, Cellular and Molecular Pharmacology Unit, Avenue E. Mounier 73, B1.73.05, B-1200 Bruxelles, Belgium.
| |
Collapse
|
39
|
Orczyk M, Wojciechowski K, Brezesinski G. Disordering Effects of Digitonin on Phospholipid Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3871-3881. [PMID: 28333465 DOI: 10.1021/acs.langmuir.6b04613] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Digitonin, a steroidal saponin obtained from the foxglove plant (Digitalis purpurea), displays a wide spectrum of biological properties and is often used as a model in mechanistic investigations of the biological activity of saponins. In the present study, Langmuir monolayers of zwitterionic (DPPC, DMPE, POPC, POPE, DSPC, DSPE, and DPPE) and ionic (DPPS and DPPG) phospholipids were employed in order to better understand the effect of digitonin on the lipid organization. For this purpose, a combination of surface pressure relaxation, infrared reflection absorption spectroscopy (IRRAS), and fluorescence microscopy measurements was used. The observed increase in surface pressure (Π) suggests that digitonin can adsorb at the air/water interface, both bare and covered with the uncompressed phospholipid monolayers. However, the detailed analysis of IRRAS and fluorescence microscopy data shows that digitonin interacts with the lipid monolayers in a very selective way, and both the headgroup and the lipid tails affect this interaction. Nevertheless, it should be noted that in no case did digitonin cause any disruptive effects on the monolayers. The DPPE and DPPS monolayers get disordered by penetration with digitonin, despite an increase in surface pressure, leading to an unprecedented LC-LE transition. Interestingly, saponin could be easily squeezed out of these monolayers by mechanical compression.
Collapse
Affiliation(s)
- M Orczyk
- Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland
| | - K Wojciechowski
- Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland
| | - G Brezesinski
- Max Planck Institute of Colloids and Interfaces , Science Park Potsdam-Golm, 14476 Potsdam, Germany
| |
Collapse
|
40
|
Smith WS, Baker EJ, Holmes SE, Koster G, Hunt AN, Johnston DA, Flavell SU, Flavell DJ. Membrane cholesterol is essential for triterpenoid saponin augmentation of a saporin-based immunotoxin directed against CD19 on human lymphoma cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:993-1007. [PMID: 28235471 DOI: 10.1016/j.bbamem.2017.02.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/16/2017] [Accepted: 02/20/2017] [Indexed: 01/06/2023]
Abstract
Triterpenoid saponins from Saponinum Album (SA) exert potent lytic effects on eukaryotic cell plasma membranes and, when used at sub-lytic concentrations, significantly augment the cytotoxicity of saporin-based immunotoxins (IT). To help elucidate the mechanism(s) behind these two phenomena we investigated the role of cholesterol to both. Human Daudi lymphoma cells were lipid deprived using a combination of three different approaches. Following treatment, the total cellular lipid content was analyzed by electrospray ionization mass spectrometry (ESI-MS) and plasma membrane (PM) cholesterol content measured using the lipophilic fluorescent probe NR12S. Maximal lipid deprivation of cells resulted in a complete loss of sensitivity to lysis by SA. Similarly augmentation of the anti-CD19 immunotoxin (IT) BU12-SAPORIN by SA was lost but without a concomitant loss of intrinsic IT cytotoxicity. The lytic activity of SA was restored following incubation of lipid deprived Daudi cells with Synthecol or LDL. The augmentative effect of SA on IT cytotoxicity for Daudi cells was restored following repletion of PM cholesterol levels with LDL. NR12S fluorescence and ESI-MS analysis of cellular lipids demonstrated that restoration of SA lytic activity by Synthecol was entirely due to increased PM cholesterol levels. Restoration of cellular and PM cholesterol levels by LDL also restored the augmentative effect of SA for IT, an effect associated with repletion of PM cholesterol with minor changes in some phospholipid species. These results indicate that the lytic and IT augmentative properties of SA are cholesterol-dependent in contrast to intrinsic IT cytotoxicity that is at least partially cholesterol independent.
Collapse
Affiliation(s)
- Wendy S Smith
- The Simon Flavell Leukaemia Research Laboratory, Southampton General Hospital, Southampton, Hampshire SO16 6YD, United Kingdom
| | - Ella J Baker
- The Simon Flavell Leukaemia Research Laboratory, Southampton General Hospital, Southampton, Hampshire SO16 6YD, United Kingdom; Human Development and Health Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Suzanne E Holmes
- The Simon Flavell Leukaemia Research Laboratory, Southampton General Hospital, Southampton, Hampshire SO16 6YD, United Kingdom
| | - Grielof Koster
- NIHR Respiratory Biomedical Research Unit, UHS, University of Southampton School of Medicine, Southampton General Hospital, Southampton SO16 6YD, United Kingdom; Clinical and Experimental Sciences, University of Southampton School of Medicine, Southampton General Hospital, Southampton SO16 6YD, United Kingdom
| | - Alan N Hunt
- Clinical and Experimental Sciences, University of Southampton School of Medicine, Southampton General Hospital, Southampton SO16 6YD, United Kingdom
| | - David A Johnston
- Biomedical Imaging Unit, University of Southampton School of Medicine, Southampton General Hospital, Southampton SO16 6YD, United Kingdom
| | - Sopsamorn U Flavell
- The Simon Flavell Leukaemia Research Laboratory, Southampton General Hospital, Southampton, Hampshire SO16 6YD, United Kingdom
| | - David J Flavell
- The Simon Flavell Leukaemia Research Laboratory, Southampton General Hospital, Southampton, Hampshire SO16 6YD, United Kingdom.
| |
Collapse
|
41
|
Otzen DE. Biosurfactants and surfactants interacting with membranes and proteins: Same but different? BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1859:639-649. [PMID: 27693345 DOI: 10.1016/j.bbamem.2016.09.024] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 09/24/2016] [Accepted: 09/26/2016] [Indexed: 01/21/2023]
Abstract
Biosurfactants (BS) are surface-active molecules produced by microorganisms. For several decades they have attracted interest as promising alternatives to current petroleum-based surfactants. Aside from their green profile, they have remarkably low critical micelle concentrations, reduce the air/water surface tension to very low levels and are excellent emulsifiers, all of which make them comparable or superior to their synthetic counterparts. These remarkable physical properties derive from their more complex chemical structures in which hydrophilic and hydrophobic regions are not as clearly separated as chemical surfactants but have a more mosaic distribution of polarity as well as branched or circular structures. This allows the lipopeptide surfactin to adopt spherical structures to facilitate dense packing at interfaces. They are also more complex. Glycolipid BS, e.g. rhamnolipids (RL) and sophorolipids, are produced biologically as mixtures which vary in the size and saturation of the hydrophobic region as well as modifications in the hydrophilic headgroup, such as the number of sugar groups and different levels of acetylation, leading to variable surface-active properties. Their amphiphilicity allows RL to insert easily into membranes at sub-cmc concentrations to modulate membrane structure and extract lipopolysaccharides, leading to extensive biofilm remodeling in vivo, sometimes in collaboration with hydrophobic RL precursors. Thanks to their mosaicity, even anionic BS like RL only bind weakly to proteins and show much lower denaturing potency, even supporting membrane protein refolding. Nevertheless, they can promote protein degradation by proteases e.g. by neutralizing positive charges, which together with their biofilm-combating properties makes them very promising detergent surfactants. This article is part of a Special Issue entitled: Lipid order/lipid defects and lipid-control of protein activity edited by Dirk Schneider.
Collapse
Affiliation(s)
- Daniel E Otzen
- iNANO, Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 14, DK - 8000 Aarhus, C, Denmark.
| |
Collapse
|
42
|
Wojciechowski K, Orczyk M, Gutberlet T, Brezesinski G, Geue T, Fontaine P. On the Interaction between Digitonin and Cholesterol in Langmuir Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:9064-9073. [PMID: 27518122 DOI: 10.1021/acs.langmuir.6b01737] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this article, we describe the effect of a highly hemolytic saponin, digitonin, on model lipids cholesterol and dipalmitoylphosphatidylcholine (DPPC) using a combination of tensiometric (surface pressure and dilatational surface elasticity), spectroscopic (infrared reflection absorption spectroscopy, IRRAS), microscopic (fluorescence microscopy), and scattering techniques (neutron reflectivity, NR, and grazing incidence X-ray diffraction, GIXD). The monolayers of individual lipids and their 10:9 (mol/mol) mixture were exposed to an aqueous solution of digitonin (10(-4) M) by subphase exchange using a setup developed recently in our laboratory. The results confirm that digitonin can adsorb onto both bare and lipid-covered water-air interfaces. In the case of DPPC, a relatively weak interaction can be observed, but the presence of cholesterol drastically enhances the effect of digitonin. The latter is shown to dissociate the weak cholesterol-DPPC complexes and to bind cholesterol in an additional layer attached to the original lipid monolayer.
Collapse
Affiliation(s)
- Kamil Wojciechowski
- Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland
| | - Marta Orczyk
- Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland
| | - Thomas Gutberlet
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85748 Garching, Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, Potsdam, Germany
| | - Thomas Geue
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute , WHGA/110, 5232 Villigen - PSI, Switzerland
| | - Philippe Fontaine
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP48, Gif-sur-Yvette Cedex, France
| |
Collapse
|
43
|
Kapla J, Stevensson B, Maliniak A. Coarse-Grained Molecular Dynamics Simulations of Membrane–Trehalose Interactions. J Phys Chem B 2016; 120:9621-31. [DOI: 10.1021/acs.jpcb.6b06566] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jon Kapla
- Department of Materials and
Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 106
91 Stockholm, Sweden
| | - Baltzar Stevensson
- Department of Materials and
Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 106
91 Stockholm, Sweden
| | - Arnold Maliniak
- Department of Materials and
Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 106
91 Stockholm, Sweden
| |
Collapse
|
44
|
Complexation of phospholipids and cholesterol by triterpenic saponins in bulk and in monolayers. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1858:363-73. [PMID: 26654784 DOI: 10.1016/j.bbamem.2015.12.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 12/01/2015] [Indexed: 01/23/2023]
Abstract
The interactions between three triterpene saponins: α-hederin, hederacoside C and ammonium glycyrrhizate with model lipids: cholesterol and dipalmitoylphosphatidylcholine (DPPC) are described. The oleanolic acid-type saponins (α-hederin and hederacoside C) were shown to form 1:1 complexes with lipids in bulk, characterized by stability constants in the range (4.0±0.2)·10(3)-(5.0±0.4)·10(4) M(-1). The complexes with cholesterol are generally stronger than those with DPPC. On the contrary, ammonium glycyrrhizate does not form complexes with any of the lipids in solution. The saponin-lipid interactions were also studied in a confined environment of Langmuir monolayers of DPPC and DPPC/cholesterol with the saponins present in the subphase. A combined monolayer relaxation, surface dilational rheology, fluorescence microscopy and neutron reflectivity (NR) study showed that all three saponins are able to penetrate pure DPPC and mixed DPPC/cholesterol monolayers. Overall, the effect of the saponins on the model lipid monolayers does not fully correlate with the lipid-saponin complex formation in the homogeneous solution. The best correlation was found for α-hederin, for which even the preference for cholesterol over DPPC observed in bulk is well reflected in the monolayer studies and the literature data on its membranolytic activity. Similarly, the lack of interaction of ammonium glycyrrhizate with both lipids is evident equally in bulk and monolayer experiments, as well as in its weak membranolytic activity. The combined bulk and monolayer results are discussed in view of the role of confinement in modulating the saponin-lipid interactions and possible mechanism of membranolytic activity of saponins.
Collapse
|
45
|
Lorent JH, Quetin-Leclercq J, Mingeot-Leclercq MP. The amphiphilic nature of saponins and their effects on artificial and biological membranes and potential consequences for red blood and cancer cells. Org Biomol Chem 2015; 12:8803-22. [PMID: 25295776 DOI: 10.1039/c4ob01652a] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Saponins, amphiphiles of natural origin with numerous biological activities, are widely used in the cosmetic and pharmaceutical industry. Some saponins exhibit relatively selective cytotoxic effects on cancer cells but the tendency of saponins to induce hemolysis limits their anticancer potential. This review focused on the effects of saponin activity on membranes and consequent implications for red blood and cancer cells. This activity seems to be strongly related to the amphiphilic character of saponins that gives them the ability to self-aggregate and interact with membrane components such as cholesterol and phospholipids. Membrane interactions of saponins with artificial membrane models, red blood and cancer cells are reviewed with respect to their molecular structures. The review considered the mechanisms of these membrane interactions and their consequences including the modulation of membrane dynamics, interaction with membrane rafts, and membrane lysis. We summarized current knowledge concerning the mechanisms involved in the interactions of saponins with membrane lipids and examined the structure activity relationship of saponins regarding hemolysis and cancer cell death. A critical analysis of these findings speculates on their potential to further develop new anticancer compounds.
Collapse
Affiliation(s)
- Joseph H Lorent
- Université catholique de Louvain, Louvain Drug Research Institute, Cellular and Molecular Pharmacology (FACM), Avenue Mounier 73, B1.73.05, B-1200 Brussels, Belgium.
| | | | | |
Collapse
|
46
|
Habib L, Jraij A, Khreich N, Charcosset C, Greige-Gerges H. Effect of Erythrodiol, A Natural Pentacyclic Triterpene from Olive Oil, on the Lipid Membrane Properties. J Membr Biol 2015; 248:1079-87. [DOI: 10.1007/s00232-015-9821-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 06/25/2015] [Indexed: 10/23/2022]
|
47
|
Beck Z, Matyas GR, Alving CR. Detection of liposomal cholesterol and monophosphoryl lipid A by QS-21 saponin and Limulus polyphemus amebocyte lysate. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:775-80. [DOI: 10.1016/j.bbamem.2014.12.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 11/26/2014] [Accepted: 12/05/2014] [Indexed: 11/16/2022]
|
48
|
Park JI, Bae HR, Kim CG, Stonik VA, Kwak JY. Relationships between chemical structures and functions of triterpene glycosides isolated from sea cucumbers. Front Chem 2014; 2:77. [PMID: 25250309 PMCID: PMC4159031 DOI: 10.3389/fchem.2014.00077] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Accepted: 08/21/2014] [Indexed: 11/15/2022] Open
Abstract
Many marine triterpene glycosides have in vitro and in vivo activities with very low toxicity, suggesting that they are suitable agents for the prevention and treatment of different diseases, particularly cancer. However, the molecular mechanisms of action of natural marine compounds in cancer, immune, and other various cells are not fully known. This review focuses on the structural characteristics of marine triterpene glycosides and how these affect their biological activities and molecular mechanisms. In particular, the membranotropic and membranolytic activities of frondoside A and cucumariosides from sea cucumbers and their ability to induce cytotoxicity and apoptosis have been discussed, with a focus on structure-activity relationships. In addition, the structural characteristics and antitumor effects of stichoposide C and stichoposide D have been reviewed along with underlying their molecular mechanisms.
Collapse
Affiliation(s)
- Joo-In Park
- Department of Biochemistry, Dong-A UniversityBusan, South Korea
| | - Hae-Rahn Bae
- Department of Physiology, School of Medicine, Dong-A UniversityBusan, South Korea
| | - Chang Gun Kim
- Department of Biochemistry, Dong-A UniversityBusan, South Korea
- Immune-Network Pioneer Research Center, Dong-A UniversityBusan, South Korea
| | - Valentin A. Stonik
- The Laboratory of Chemistry of Marine Natural Products, G. B. Elyakov Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch of the Russian Academy of ScienceVladivostok, Russia
| | - Jong-Young Kwak
- Department of Biochemistry, Dong-A UniversityBusan, South Korea
- Immune-Network Pioneer Research Center, Dong-A UniversityBusan, South Korea
| |
Collapse
|
49
|
Bi Y, Ma C, Zhang H, Zhou Z, Yang J, Zhang Z, Meng Q, Lewis PJ, Xu J. Novel 3-substituted ocotillol-type triterpenoid derivatives as antibacterial candidates. Chem Biol Drug Des 2014; 84:489-96. [PMID: 24811479 DOI: 10.1111/cbdd.12337] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 03/28/2014] [Accepted: 04/04/2014] [Indexed: 11/26/2022]
Abstract
Plant-derived triterpenoid saponins are involved in the plant defense system by targeting bacterial membranes. A series of ocotillol-type triterpenoid derivatives were synthesized starting from PPD, one of the main components of Panax ginseng and their antibacterial activity against several representative bacteria were evaluated. Compounds 5 and 11 exhibited excellent antibacterial activity with MIC values of 1 μg/mL against Staphylococcus aureus and 8 μg/mL and 4 μg/mL against Bacillus subtilis, respectively. Furthermore, when compounds 5 and 11 were combined with two commercial antibiotics kanamycin and chloramphenicol, they showed strong synergistic activity at sub-MIC levels against S. aureus USA300 and B. subtilis 168. Moreover, chloramphenicol turned from a bacteriostatic to a bactericidal agent when combined with compound 11 against B. subtilis 168.
Collapse
Affiliation(s)
- Yi Bi
- School of Pharmacy, Yantai University, Yantai, 264005, China
| | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Prescott TAK, Rigby LP, Veitch NC, Simmonds MSJ. The haploinsufficiency profile of α-hederin suggests a caspofungin-like antifungal mode of action. PHYTOCHEMISTRY 2014; 101:116-120. [PMID: 24569176 DOI: 10.1016/j.phytochem.2014.01.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 01/28/2014] [Accepted: 01/31/2014] [Indexed: 06/03/2023]
Abstract
The leaves of common ivy (Hedera helix) contain the cytotoxic saponin α-hederin, which is inhibitory to Candida albicans at low concentrations. To investigate the mode of action of α-hederin, a haploinsufficiency screen was carried out using a library of 1152 Saccharomyces cerevisiae deletion strains. An ethanol ivy extract containing α-hederin was used in the initial screen to reduce the amount of compound required. Strains exhibiting disproportionately low growth were then examined in more detail by comparing growth curves in the presence and absence of α-hederin. This approach identified three hypersensitive strains carrying gene deletions for components of the transcription related proteins SWI/SNF, RNA polymerase II and the RSC complex. Saponin cytotoxicity is often attributed to membrane damage, however α-hederin did not induce hypersensitivity with an aminophospholipid translocase deletion strain that is frequently hypersensitive to membrane damaging agents. The haploinsufficiency profile of α-hederin is most similar to that reported for drugs such as caspofungin that inhibit synthesis of the fungal cell wall. Screening with plant extracts rather than isolated compounds, provides a valuable shortcut in haploinsufficiency screening provided hypersensitive strains are then confirmed as such using purified active principles.
Collapse
Affiliation(s)
| | - Luke P Rigby
- Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK
| | - Nigel C Veitch
- Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK
| | | |
Collapse
|