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Le Bras C, Rault L, Jacquet N, Daniel N, Chuat V, Valence F, Bellanger A, Bousarghin L, Blat S, Le Loir Y, Le Huërou-Luron I, Even S. Two human milk-like synthetic bacterial communities displayed contrasted impacts on barrier and immune responses in an intestinal quadricellular model. ISME Commun 2024; 4:ycad019. [PMID: 38415201 PMCID: PMC10897888 DOI: 10.1093/ismeco/ycad019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 02/29/2024]
Abstract
The human milk (HM) microbiota, a highly diverse microbial ecosystem, is thought to contribute to the health benefits associated with breast-feeding, notably through its impact on infant gut microbiota. Our objective was to further explore the role of HM bacteria on gut homeostasis through a "disassembly/reassembly" strategy. HM strains covering the diversity of HM cultivable microbiota were first characterized individually and then assembled in synthetic bacterial communities (SynComs) using two human cellular models, peripheral blood mononuclear cells and a quadricellular model mimicking intestinal epithelium. Selected HM bacteria displayed a large range of immunomodulatory properties and had variable effects on epithelial barrier, allowing their classification in functional groups. This multispecies characterization of HM bacteria showed no clear association between taxonomy and HM bacteria impacts on epithelial immune and barrier functions, revealing the entirety and complexity of HM bacteria potential. More importantly, the assembly of HM strains into two SynComs of similar taxonomic composition but with strains exhibiting distinct individual properties, resulted in contrasting impacts on the epithelium. These impacts of SynComs partially diverged from the predicted ones based on individual bacteria. Overall, our results indicate that the functional properties of the HM bacterial community rather than the taxonomic composition itself could play a crucial role in intestinal homeostasis of infants.
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Affiliation(s)
- Charles Le Bras
- STLO, INRAE, Institut Agro, Rennes, 35042, France
- Institut NuMeCan, INRAE, INSERM, Univ Rennes, Rennes-Saint Gilles, 35590, France
| | - Lucie Rault
- STLO, INRAE, Institut Agro, Rennes, 35042, France
| | | | | | | | | | | | - Latifa Bousarghin
- Institut NuMeCan, INRAE, INSERM, Univ Rennes, Rennes-Saint Gilles, 35590, France
| | - Sophie Blat
- Institut NuMeCan, INRAE, INSERM, Univ Rennes, Rennes-Saint Gilles, 35590, France
| | - Yves Le Loir
- STLO, INRAE, Institut Agro, Rennes, 35042, France
| | | | - Sergine Even
- STLO, INRAE, Institut Agro, Rennes, 35042, France
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2
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Miral A, Ferron S, Rouaud I, Slyambayev D, Bousarghin L, Camuzet C, Belouzard S, Séron K, Le Pogam P, Tranchimand S, Tomasi S. Eremoxylarins D-J, Antibacterial Eremophilane Sesquiterpenes Discovered from an Endolichenic Strain of Xylaria hypoxylon. J Nat Prod 2023; 86:730-738. [PMID: 36892834 DOI: 10.1021/acs.jnatprod.2c00881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
An endolichenic strain of the Ascomycetaceous Xylaria hypoxylon, cultivated alone or in coculture with another endolichenic fungus Dendrothyrium variisporum, produced seven new bioactive eremophilane sesquiterpenes eremoxylarins D-J (1-7). The isolated compounds disclosed a high similarity with the eremophilane core of the bioactive integric acid, and structures were elucidated by 1D and 2D NMR spectra and electronic circular dichroism (ECD) analyses. Eremoxylarins D, F, G, and I showed a selective activity against Gram-positive bacteria such as methicillin-resistant Staphylococcus aureus with minimum inhibitory concentration (MIC) values between 0.39 and 12.5 μg/mL. Eremoxylarin I, the most antibacterial active sesquiterpene, was also active against HCoV-229E at a concentration nontoxic to the hepatoma Huh-7 cell line with an 50% inhibitory concentration (IC50) of 18.1 μM and a 50% cytotoxic concentration (CC50) of 46.6 μM.
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Affiliation(s)
- Alice Miral
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35042 Rennes, France
| | - Solenn Ferron
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35042 Rennes, France
| | - Isabelle Rouaud
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35042 Rennes, France
| | - Dinmukhammed Slyambayev
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35042 Rennes, France
| | - Latifa Bousarghin
- INSERM, Univ. Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR 1317, Biosit, MRic/ISFR, 35000 Rennes, France
| | - Charline Camuzet
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017, Center for Infection and Immunity of Lille (CIIL), F-59000 Lille, France
| | - Sandrine Belouzard
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017, Center for Infection and Immunity of Lille (CIIL), F-59000 Lille, France
| | - Karin Séron
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017, Center for Infection and Immunity of Lille (CIIL), F-59000 Lille, France
| | - Pierre Le Pogam
- Équipe Chimie des Substances Naturelles, BioCIS, CNRS, Université Paris-Saclay, 17, avenue des Sciences, 91400 Orsay, France
| | - Sylvain Tranchimand
- ENSCR, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35708 Rennes, France
| | - Sophie Tomasi
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35042 Rennes, France
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3
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Gautier T, Olivieiro N, Ferron S, Le Pogam P, David-Le Gall S, Sauvager A, Leroyer P, Cannie I, Dion S, Sweidan A, Loréal O, Tomasi S, Bousarghin L. Bacteroides fragilis derived metabolites, identified by molecular networking, decrease Salmonella virulence in mice model. Front Microbiol 2022; 13:1023315. [DOI: 10.3389/fmicb.2022.1023315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/26/2022] [Indexed: 11/12/2022] Open
Abstract
In the gut microbiota, resident bacteria prevent pathogens infection by producing specific metabolites. Among bacteria belonging to phylum Bacteroidota, we have previously shown that Bacteroides fragilis or its cell-free supernatant inhibited in vitro Salmonella Heidelberg translocation. In the present study, we have analyzed this supernatant to identify bioactive molecules after extraction and subsequent fractionation using a semi-preparative reversed-phase Liquid Chromatography High-Resolution Tandem Mass Spectrometry (LC-HRMS/MS). The results indicated that only two fractions (F3 and F4) strongly inhibited S. Heidelberg translocation in a model mimicking the intestinal epithelium. The efficiency of the bioactive fractions was evaluated in BALB/c mice, and the results showed a decrease of S. Heidelberg in Peyer’s patches and spleen, associated with a decrease in inflammatory cytokines and neutrophils infiltration. The reduction of the genus Alistipes in mice receiving the fractions could be related to the anti-inflammatory effects of bioactive fractions. Furthermore, these bioactive fractions did not alter the gut microbiota diversity in mice. To further characterize the compounds present in these bioactive fractions, Liquid Chromatography High-Resolution Tandem Mass Spectrometry (LC-HRMS/MS) data were analyzed through molecular networking, highlighting cholic acid (CA) and deoxycholic acid. In vitro, CA had inhibitory activity against the translocation of S. Heidelberg by significantly decreasing the expression of Salmonella virulence genes such as sipA. The bioactive fractions also significantly downregulated the flagellar gene fliC, suggesting the involvement of other active molecules. This study showed the interest to characterize better the metabolites produced by B. fragilis to make them means of fighting pathogenic bacteria by targeting their virulence factor without modifying the gut microbiota.
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Balaj G, Tamanai-Shacoori Z, Olivier-Jimenez D, Sauvager A, Faustin M, Bousarghin L, David-Le Gall S, Guyot S, Nebija D, Tomasi S, Abasq ML. An insight into an intriguing oxidative biotransformation pathway of 5- O-caffeoylquinic acid by a gut bacterium. Food Funct 2022; 13:6195-6204. [PMID: 35583033 DOI: 10.1039/d1fo04304h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Microbiota is known to play a pivotal role in generating bioavailable and bioactive low-molecular-weight metabolites from dietary polyphenols. 5-O-caffeoylquinic acid (5-CQA), one of the main polyphenols found in human diet, was submitted to a resting cell biotransformation study using three gut bacteria species Lactobacillus reuteri, Bacteroides fragilis and Bifidobacterium longum. These bacteria were selected according to their belonging to the main phyla found in human gut microbiota. Our study highlighted the ability of only one of the strains studied, L. reuteri, to bioconverse 5-CQA into various metabolites due to the expression of the cinnamoyl esterase enzyme as the first step. Interestingly, one known natural compound, esculetin, was described for the first time as a 5-CQA-derived metabolite after conversion by a gut bacterium, the other metabolites had already been reported. This evidence highlighted an interesting oxidative pathway occurring in vivo by intestinal microbiota leading to esculetin. This molecule was also identified after electrochemical and enzymatic oxidations of caffeic acid. The oxidation capacity of L. reuteri led to less diverse metabolites in comparison to those obtained either electrochemically and enzymatically where dimers and trimers were reported. Thus, esculetin may have interesting and benefical biological effects on gut microbiota, which should be further evaluated. Novel synbiotics could be formulated from the association of L. reuteri with 5-CQA.
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Affiliation(s)
- G Balaj
- Univ Rennes, CNRS, ISCR - UMR 6226, 35043 Rennes, France.
| | - Z Tamanai-Shacoori
- INSERM, Univ. Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, Rennes, France
| | | | - A Sauvager
- Univ Rennes, CNRS, ISCR - UMR 6226, 35043 Rennes, France.
| | - M Faustin
- Univ Rennes, CNRS, ISCR - UMR 6226, 35043 Rennes, France.
| | - L Bousarghin
- INSERM, Univ. Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, Rennes, France
| | - S David-Le Gall
- INSERM, Univ. Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, Rennes, France
| | - S Guyot
- INRAE, UR1268BIA, Team Polyphenol, Reactivity & Processing (PRP), BP35327, 35653 Le Rheu, France
| | - D Nebija
- Faculty of Medicine, Department of Pharmacy, University of Prishtina, 10000 Prishtinë, Kosovo
| | - S Tomasi
- Univ Rennes, CNRS, ISCR - UMR 6226, 35043 Rennes, France.
| | - M L Abasq
- Univ Rennes, CNRS, ISCR - UMR 6226, 35043 Rennes, France.
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5
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Tamanai-Shacoori Z, Le Gall-David S, Moussouni F, Sweidan A, Polard E, Bousarghin L, Jolivet-Gougeon A. SARS-CoV-2 and Prevotella spp.: friend or foe? A systematic literature review. J Med Microbiol 2022; 71. [PMID: 35511246 DOI: 10.1099/jmm.0.001520] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
During this global pandemic of the COVID-19 disease, a lot of information has arisen in the media and online without scientific validation, and among these is the possibility that this disease could be aggravated by a secondary bacterial infection such as Prevotella, as well as the interest or not in using azithromycin, a potentially active antimicrobial agent. The aim of this study was to carry out a systematic literature review, to prove or disprove these allegations by scientific arguments. The search included Medline, PubMed, and Pubtator Central databases for English-language articles published 1999-2021. After removing duplicates, a total of final eligible studies (n=149) were selected. There were more articles showing an increase of Prevotella abundance in the presence of viral infection like that related to Human Immunodeficiency Virus (HIV), Papillomavirus (HPV), Herpesviridae and respiratory virus, highlighting differences according to methodologies and patient groups. The arguments for or against the use of azithromycin are stated in light of the results of the literature, showing the role of intercurrent factors, such as age, drug consumption, the presence of cancer or periodontal diseases. However, clinical trials are lacking to prove the direct link between the presence of Prevotella spp. and a worsening of COVID-19, mainly those using azithromycin alone in this indication.
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Affiliation(s)
- Zohreh Tamanai-Shacoori
- Univ Rennes, INSERM, INRAE, CHU Rennes, Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
| | - Sandrine Le Gall-David
- Univ Rennes, INSERM, INRAE, CHU Rennes, Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
| | - Fouzia Moussouni
- Univ Rennes, INSERM, INRAE, CHU Rennes, Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
| | - Alaa Sweidan
- Laboratory of Microbiology, Department of Life and Earth Sciences, Faculty of Sciences, Lebanese University, Hadath Campus, Beirut, Lebanon
| | - Elisabeth Polard
- Teaching Hospital Rennes, Service de Pharmacovigilance, F-35033 Rennes, France
| | - Latifa Bousarghin
- Univ Rennes, INSERM, INRAE, CHU Rennes, Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
| | - Anne Jolivet-Gougeon
- Univ Rennes, INSERM, INRAE, CHU Rennes, Institut NUMECAN (Nutrition Metabolisms and Cancer), F-35000 Rennes, France
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6
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Gautier T, David-Le Gall S, Sweidan A, Tamanai-Shacoori Z, Jolivet-Gougeon A, Loréal O, Bousarghin L. Next-Generation Probiotics and Their Metabolites in COVID-19. Microorganisms 2021; 9:microorganisms9050941. [PMID: 33925715 PMCID: PMC8146258 DOI: 10.3390/microorganisms9050941] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/24/2021] [Accepted: 04/26/2021] [Indexed: 02/06/2023] Open
Abstract
Since December 2019, a global pandemic has been observed, caused by the emergence of a new coronavirus, SARS CoV-2. The latter is responsible for the respiratory disease, COVID-19. The infection is also characterized by renal, hepatic, and gastrointestinal dysfunctions suggesting the spread of the virus to other organs. A dysregulated immune response was also reported. To date, there is no measure to treat or prevent SARS CoV-2 infection. Additionally, as gut microbiota composition is altered in patients with COVID-19, alternative therapies using probiotics can be considered to fight SARS CoV-2 infection. This review aims at summarizing the current knowledge about next-generation probiotics (NGPs) and their benefits in viral respiratory tract infections and in COVID-19. We describe these bacteria, highlighted by studies using metagenomic approaches. In addition, these bacteria generate metabolites such as butyrate, desaminotyrosine, and secondary bile acid, suggested to prevent viral respiratory infections. Gut microbial metabolites transported via the circulation to the lungs could inhibit viral replication or improve the immune response against viruses. The use of probiotics and/or their metabolites may target either the virus itself and/or the immunologic process. However, this review showed that more studies are needed to determine the benefits of probiotics and metabolite products in COVID-19.
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Affiliation(s)
- Thomas Gautier
- UMR 1241, Nutrition Metabolisms and Cancer Institute, Inserm, INRAE, Université de Rennes 1, 35000 Rennes, France; (T.G.); (S.D.-L.G.); (Z.T.-S.); (A.J.-G.); (O.L.)
| | - Sandrine David-Le Gall
- UMR 1241, Nutrition Metabolisms and Cancer Institute, Inserm, INRAE, Université de Rennes 1, 35000 Rennes, France; (T.G.); (S.D.-L.G.); (Z.T.-S.); (A.J.-G.); (O.L.)
| | - Alaa Sweidan
- Laboratory of Microbiology, Department of Life and Earth Sciences, Faculty of Sciences I, Lebanese University, Hadath Campus, P.O. Box 6573/14 Beirut, Lebanon;
| | - Zohreh Tamanai-Shacoori
- UMR 1241, Nutrition Metabolisms and Cancer Institute, Inserm, INRAE, Université de Rennes 1, 35000 Rennes, France; (T.G.); (S.D.-L.G.); (Z.T.-S.); (A.J.-G.); (O.L.)
| | - Anne Jolivet-Gougeon
- UMR 1241, Nutrition Metabolisms and Cancer Institute, Inserm, INRAE, Université de Rennes 1, 35000 Rennes, France; (T.G.); (S.D.-L.G.); (Z.T.-S.); (A.J.-G.); (O.L.)
| | - Olivier Loréal
- UMR 1241, Nutrition Metabolisms and Cancer Institute, Inserm, INRAE, Université de Rennes 1, 35000 Rennes, France; (T.G.); (S.D.-L.G.); (Z.T.-S.); (A.J.-G.); (O.L.)
| | - Latifa Bousarghin
- UMR 1241, Nutrition Metabolisms and Cancer Institute, Inserm, INRAE, Université de Rennes 1, 35000 Rennes, France; (T.G.); (S.D.-L.G.); (Z.T.-S.); (A.J.-G.); (O.L.)
- Correspondence: ; Tel.: +33-2232-3489-8
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7
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Noël A, Garnier A, Clément M, Rouaud I, Sauvager A, Bousarghin L, Vásquez-Ocmín P, Maciuk A, Tomasi S. Lichen-associated bacteria transform antibacterial usnic acid to products of lower antibiotic activity. Phytochemistry 2021; 181:112535. [PMID: 33099225 DOI: 10.1016/j.phytochem.2020.112535] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 09/22/2020] [Accepted: 09/30/2020] [Indexed: 06/11/2023]
Abstract
Lichens are specific symbiotic organisms harboring various microorganisms in addition to the two classic partners (algae or cyanobacterium and fungus). Although lichens produce many antibiotic compounds such as (+)-usnic acid, their associated microorganisms possess the ability to colonize an environment where antibiosis exists. Here, we have studied the behavior of several lichen-associated bacterial strains in the presence of (+)-usnic acid, a known antibiotic lichen compound. The effect of this compound was firstly evaluated on the growth and metabolism of three bacteria, thus showing its ability to inhibit Gram-positive bacteria. This inhibition was not thwarted with the usnic acid producer strain Streptomyces cyaneofuscatus. The biotransformation of this lichen metabolite was also studied. An ethanolamine derivative of (+)-usnic acid with low antibiotic activity was highlighted with chemical profiling, using HPLC-UV combined with low resolution mass spectrometry. These findings highlight the way in which some strains develop resistance mechanisms. A methylated derivative of (+)-usnic acid was annotated using the molecular networking method, thus showing the interest of this computer-based approach in biotransformation studies.
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Affiliation(s)
- Alba Noël
- Univ Rennes, CNRS, ISCR - UMR 6226, F-35000, Rennes, France
| | | | | | | | | | - Latifa Bousarghin
- INSERM, Univ. Rennes, INRA, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, Rennes, France
| | | | - Alexandre Maciuk
- Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Sophie Tomasi
- Univ Rennes, CNRS, ISCR - UMR 6226, F-35000, Rennes, France.
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8
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Vernay T, Cannie I, Gaboriau F, Gall SDL, Tamanai-Shacoori Z, Burel A, Jolivet-Gougeon A, Loréal O, Bousarghin L. Bacteroides fragilis prevents Salmonella Heidelberg translocation in co-culture model mimicking intestinal epithelium. Benef Microbes 2020; 11:391-401. [PMID: 32720833 DOI: 10.3920/bm2020.0004] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Salmonella Heidelberg is one of the most common serovar causing foodborne illnesses. To limit the development of digestive bacterial infection, food supplements containing probiotic bacteria can be proposed. Commensal non-toxigenic Bacteroides fragilis has recently been suggested as a next-generation probiotic candidate. By using an original triple co-culture model including Caco-2 cells (representing human enterocytes), HT29-MTX (representing mucus-secreting goblet cells), and M cells differentiated from Caco-2 by addition of Raji B lymphocytes, bacterial translocation was evaluated. The data showed that S. Heidelberg could translocate in the triple co-culture model with high efficiency, whereas for B. fragilis a weak translocation was obtained. When cells were exposed to both bacteria, S. Heidelberg translocation was inhibited. The cell-free supernatant of B. fragilis also inhibited S. Heidelberg translocation without impacting epithelial barrier integrity. This supernatant did not affect the growth of S. Heidelberg. The non-toxigenic B. fragilis confers health benefits to the host by reducting bacterial translocation. These results suggested that the multicellular model provides an efficient in vitro model to evaluate the translocation of pathogens and to screen for probiotics that have a potential inhibitory effect on this translocation.
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Affiliation(s)
- T Vernay
- INSERM, Univ Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, 2 rue Henri Le Guilloux, 35033 Rennes, France
| | - I Cannie
- INSERM, Univ Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, 2 rue Henri Le Guilloux, 35033 Rennes, France
| | - F Gaboriau
- INSERM, Univ Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, 2 rue Henri Le Guilloux, 35033 Rennes, France
| | - S David-Le Gall
- INSERM, Univ Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, 2 rue Henri Le Guilloux, 35033 Rennes, France
| | - Z Tamanai-Shacoori
- INSERM, Univ Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, 2 rue Henri Le Guilloux, 35033 Rennes, France
| | - A Burel
- Plateforme microscopie électronique MRic/ISFR Biosit/campus Santé, Rennes 1, 2 Avenue du Professeur Léon Bernard, 35000 Rennes, France
| | - A Jolivet-Gougeon
- INSERM, Univ Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, 2 rue Henri Le Guilloux, 35033 Rennes, France
| | - O Loréal
- INSERM, Univ Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, 2 rue Henri Le Guilloux, 35033 Rennes, France
| | - L Bousarghin
- INSERM, Univ Rennes, INRAE, CHU Rennes, Nutrition Metabolisms and Cancer (NuMeCan), UMR-1241, Biosit, MRic/ISFR, 2 rue Henri Le Guilloux, 35033 Rennes, France
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9
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Sweidan A, Smida I, Chollet-Krugler M, Sauvager A, Vallet J, Gouault N, Oliviero N, Tamanai-Shacoori Z, Burel A, van de Weghe P, Chokr A, Tomasi S, Bousarghin L. Lichen butyrolactone derivatives disrupt oral bacterial membrane. Fitoterapia 2019; 137:104274. [DOI: 10.1016/j.fitote.2019.104274] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 07/20/2019] [Accepted: 07/21/2019] [Indexed: 02/06/2023]
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10
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Tamanai-Shacoori Z, Smida I, Bousarghin L, Loreal O, Meuric V, Fong SB, Bonnaure-Mallet M, Jolivet-Gougeon A. Roseburia spp.: a marker of health? Future Microbiol 2017; 12:157-170. [PMID: 28139139 DOI: 10.2217/fmb-2016-0130] [Citation(s) in RCA: 392] [Impact Index Per Article: 56.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The genus Roseburia consists of obligate Gram-positive anaerobic bacteria that are slightly curved, rod-shaped and motile by means of multiple subterminal flagella. It includes five species: Roseburia intestinalis, R. hominis, R. inulinivorans, R. faecis and R. cecicola. Gut Roseburia spp. metabolize dietary components that stimulate their proliferation and metabolic activities. They are part of commensal bacteria producing short-chain fatty acids, especially butyrate, affecting colonic motility, immunity maintenance and anti-inflammatory properties. Modification in Roseburia spp. representation may affect various metabolic pathways and is associated with several diseases (including irritable bowel syndrome, obesity, Type 2 diabetes, nervous system conditions and allergies). Roseburia spp. could also serve as biomarkers for symptomatic pathologies (e.g., gallstone formation) or as probiotics for restoration of beneficial flora.
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Affiliation(s)
- Zohreh Tamanai-Shacoori
- INSERM 1241/NUtrition MEtabolism CANcer/CIMIAD, 2 avenue du Professeur Léon Bernard, Rennes, France
| | - Imen Smida
- INSERM 1241/NUtrition MEtabolism CANcer/CIMIAD, 2 avenue du Professeur Léon Bernard, Rennes, France
| | - Latifa Bousarghin
- INSERM 1241/NUtrition MEtabolism CANcer/CIMIAD, 2 avenue du Professeur Léon Bernard, Rennes, France
| | - Olivier Loreal
- INSERM 1241/NUtrition MEtabolism CANcer/CIMIAD, 2 avenue du Professeur Léon Bernard, Rennes, France
| | - Vincent Meuric
- INSERM 1241/NUtrition MEtabolism CANcer/CIMIAD, 2 avenue du Professeur Léon Bernard, Rennes, France.,CHU Rennes, 2 rue Henri Le Guilloux, 35000 Rennes, France.,Université de Rennes 1, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Shao Bing Fong
- Université de Rennes 1, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Martine Bonnaure-Mallet
- INSERM 1241/NUtrition MEtabolism CANcer/CIMIAD, 2 avenue du Professeur Léon Bernard, Rennes, France.,CHU Rennes, 2 rue Henri Le Guilloux, 35000 Rennes, France.,Université de Rennes 1, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Anne Jolivet-Gougeon
- INSERM 1241/NUtrition MEtabolism CANcer/CIMIAD, 2 avenue du Professeur Léon Bernard, Rennes, France.,CHU Rennes, 2 rue Henri Le Guilloux, 35000 Rennes, France.,Université de Rennes 1, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
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11
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Sweidan A, Chollet-Krugler M, Sauvager A, van de Weghe P, Chokr A, Bonnaure-Mallet M, Tomasi S, Bousarghin L. Antibacterial activities of natural lichen compounds against Streptococcus gordonii and Porphyromonas gingivalis. Fitoterapia 2017; 121:164-169. [PMID: 28736072 DOI: 10.1016/j.fitote.2017.07.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 07/17/2017] [Accepted: 07/19/2017] [Indexed: 12/18/2022]
Abstract
The oral bacteria not only infect the mouth and reside there, but also travel through the blood and reach distant body organs. If left untreated, the dental biofilm that can cause destructive inflammation in the oral cavity may result in serious medical complications. In dental biofilm, Streptococcus gordonii, a primary oral colonizer, constitutes the platform on which late pathogenic colonizers like Porphyromonas gingivalis, the causative agent of periodontal diseases, will bind. The aim of this study was to determine the antibacterial activity of eleven natural lichen compounds belonging to different chemical families and spanning from linear into cyclic and aromatic structures to uncover new antibiotics which can fight against the oral bacteria. The compounds were screened by broth microdilution assay. Three compounds were shown to have promising antibacterial activities where the depsidone core with certain functional groups constituted the best compound, psoromic acid, with the lowest MICs=11.72 and 5.86μg/mL against S. gordonii and P. gingivalis, respectively. The compounds screened had promising antibacterial activity which might be attributed to some important functional groups as discussed in our study. The best compounds did not induce the death of gingival epithelial carcinoma cells (Ca9-22). These results introduce new compounds having potent antibacterial activities against oral pathogens causing serious medical complications.
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Affiliation(s)
- Alaa Sweidan
- U-1241 INSERM-INRA, Equipe CIMIAD, Univ. Rennes 1, Univ. Bretagne Loire, 2 Avenue du Pr. Léon Bernard, F-35043 Rennes, France; Laboratory of Microbiology, Department of Life and Earth Sciences, Faculty of Sciences I, Lebanese University, Hadath Campus, Beirut, Lebanon
| | - Marylène Chollet-Krugler
- UMR CNRS 6226, Institut des Sciences Chimiques de Rennes, Equipe CORINT, Univ. Rennes 1, Univ. Bretagne Loire, 2 Avenue du Pr. Léon Bernard, F-35043 Rennes, France
| | - Aurélie Sauvager
- UMR CNRS 6226, Institut des Sciences Chimiques de Rennes, Equipe CORINT, Univ. Rennes 1, Univ. Bretagne Loire, 2 Avenue du Pr. Léon Bernard, F-35043 Rennes, France
| | - Pierre van de Weghe
- Inserm U1242, Chemistry Oncogenesis Stress Signaling (COSS), Univ. Bretagne Loire, 2 Avenue du Pr. Léon Bernard, F-35043 Rennes, France
| | - Ali Chokr
- Laboratory of Microbiology, Department of Life and Earth Sciences, Faculty of Sciences I, Lebanese University, Hadath Campus, Beirut, Lebanon
| | - Martine Bonnaure-Mallet
- U-1241 INSERM-INRA, Equipe CIMIAD, Univ. Rennes 1, Univ. Bretagne Loire, 2 Avenue du Pr. Léon Bernard, F-35043 Rennes, France
| | - Sophie Tomasi
- UMR CNRS 6226, Institut des Sciences Chimiques de Rennes, Equipe CORINT, Univ. Rennes 1, Univ. Bretagne Loire, 2 Avenue du Pr. Léon Bernard, F-35043 Rennes, France
| | - Latifa Bousarghin
- U-1241 INSERM-INRA, Equipe CIMIAD, Univ. Rennes 1, Univ. Bretagne Loire, 2 Avenue du Pr. Léon Bernard, F-35043 Rennes, France.
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12
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Dupin C, Tamanai-Shacoori Z, Ehrmann E, Dupont A, Barloy-Hubler F, Bousarghin L, Bonnaure-Mallet M, Jolivet-Gougeon A. Oral Gram-negative anaerobic bacilli as a reservoir of β-lactam resistance genes facilitating infections with multiresistant bacteria. Int J Antimicrob Agents 2015; 45:99-105. [DOI: 10.1016/j.ijantimicag.2014.10.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 10/15/2014] [Indexed: 11/15/2022]
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13
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Le Bars H, Bonnaure-Mallet M, Barloy-Hubler F, Jolivet-Gougeon A, Bousarghin L. Strong mutator phenotype drives faster adaptation from growth on glucose to growth on acetate in Salmonella. Microbiology (Reading) 2014; 160:2264-2271. [PMID: 25031423 DOI: 10.1099/mic.0.079244-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The metabolic adaptation of strong mutator strains was studied to better understand the link between the strong mutator phenotype and virulence. Analysis of the growth curves of isogenic strains of Salmonella, which were previously grown in M63 glucose media, revealed that the exponential phase of growth was reached earlier in an M63 acetate medium with strong mutator strains (mutated in mutS or in mutL) than with normomutator strains (P<0.05). Complemented strains confirmed the direct role of the strong mutator phenotype in this faster metabolic adaptation to the assimilation of acetate. In a mixed cell population, proliferation of strong mutators over normomutators was observed when the carbon source was switched from glucose to acetate. These results add to the sparse body of knowledge about strong mutators and highlight the selective advantage conferred by the strong mutator phenotype to adapt to a switch of carbon source in the environment. This work may provide clinically useful information given that there is a high prevalence of strong mutators among pathogenic strains of Salmonella and that acetate is the principal short chain fatty acid of the human terminal ileum and colon where Salmonella infection is localized.
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Affiliation(s)
- Hervé Le Bars
- CHU, 2 rue Henri Le Guilloux, 35033 Rennes cedex 9, France.,Equipe Microbiologie, EA 1254, SFR BIOSIT, Université Européenne de Bretagne, Université de Rennes I, 2 Avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Martine Bonnaure-Mallet
- CHU, 2 rue Henri Le Guilloux, 35033 Rennes cedex 9, France.,Equipe Microbiologie, EA 1254, SFR BIOSIT, Université Européenne de Bretagne, Université de Rennes I, 2 Avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Frédérique Barloy-Hubler
- Amadeus Platform, SFR BIOSIT, Rennes, France.,CNRS UMR 6290, IGDR, Equipe Sp@rte, Université de Rennes 1, Campus de Beaulieu, Rennes, France
| | - Anne Jolivet-Gougeon
- CHU, 2 rue Henri Le Guilloux, 35033 Rennes cedex 9, France.,Equipe Microbiologie, EA 1254, SFR BIOSIT, Université Européenne de Bretagne, Université de Rennes I, 2 Avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Latifa Bousarghin
- Equipe Microbiologie, EA 1254, SFR BIOSIT, Université Européenne de Bretagne, Université de Rennes I, 2 Avenue du Professeur Léon Bernard, 35043 Rennes, France
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14
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Le Bars H, Bousarghin L, Bonnaure-Mallet M, Jolivet-Gougeon A. Role of a short tandem leucine/arginine repeat in strong mutator phenotype acquisition in a clinical isolate ofSalmonellaTyphimurium. FEMS Microbiol Lett 2012; 338:101-6. [DOI: 10.1111/1574-6968.12039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 10/15/2012] [Accepted: 10/19/2012] [Indexed: 11/28/2022] Open
Affiliation(s)
| | - Latifa Bousarghin
- Equipe Microbiologie; EA 1254; SFR BIOSIT; Université Européenne de Bretagne; Rennes; France
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15
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Jolivet-Gougeon A, Kovacs B, Le Gall-David S, Le Bars H, Bousarghin L, Bonnaure-Mallet M, Lobel B, Guillé F, Soussy CJ, Tenke P. Bacterial hypermutation: clinical implications. J Med Microbiol 2011; 60:563-573. [PMID: 21349992 DOI: 10.1099/jmm.0.024083-0] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Heritable hypermutation in bacteria is mainly due to alterations in the methyl-directed mismatch repair (MMR) system. MMR-deficient strains have been described from several bacterial species, and all of the strains exhibit increased mutation frequency and recombination, which are important mechanisms for acquired drug resistance in bacteria. Antibiotics select for drug-resistant strains and refine resistance determinants on plasmids, thus stimulating DNA recombination via the MMR system. Antibiotics can also act as indirect promoters of antibiotic resistance by inducing the SOS system and certain error-prone DNA polymerases. These alterations have clinical consequences in that efficacious treatment of bacterial infections requires high doses of antibiotics and/or a combination of different classes of antimicrobial agents. There are currently few new drugs with low endogenous resistance potential, and the development of such drugs merits further research.
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Affiliation(s)
- Anne Jolivet-Gougeon
- Equipe Microbiologie, UPRES-EA 1254, Pontchaillou Teaching Hospital and Faculté des Sciences Pharmaceutiques et Biologiques, Université de Rennes I, Université Européenne de Bretagne, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Bela Kovacs
- Department of Urology, Jahn Ferenc Del-Pesti Hospital, Koves ut 2, 1204 Budapest, Hungary
| | - Sandrine Le Gall-David
- Equipe Microbiologie, UPRES-EA 1254, Pontchaillou Teaching Hospital and Faculté des Sciences Pharmaceutiques et Biologiques, Université de Rennes I, Université Européenne de Bretagne, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Hervé Le Bars
- Equipe Microbiologie, UPRES-EA 1254, Pontchaillou Teaching Hospital and Faculté des Sciences Pharmaceutiques et Biologiques, Université de Rennes I, Université Européenne de Bretagne, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Latifa Bousarghin
- Equipe Microbiologie, UPRES-EA 1254, Pontchaillou Teaching Hospital and Faculté des Sciences Pharmaceutiques et Biologiques, Université de Rennes I, Université Européenne de Bretagne, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Martine Bonnaure-Mallet
- Equipe Microbiologie, UPRES-EA 1254, Pontchaillou Teaching Hospital and Faculté des Sciences Pharmaceutiques et Biologiques, Université de Rennes I, Université Européenne de Bretagne, 2 avenue du Professeur Léon Bernard, 35043 Rennes, France
| | - Bernard Lobel
- Service d'Urologie, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes cedex 9, France
| | - François Guillé
- Service d'Urologie, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes cedex 9, France
| | - Claude-James Soussy
- Service de Bactériologie-Virologie-Hygiène, CHU Henri-Mondor, 51 avenue du Maréchal-de-Lattre-de-Tassigny, 94010 Créteil cedex, France
| | - Peter Tenke
- Department of Urology, Jahn Ferenc Del-Pesti Hospital, Koves ut 2, 1204 Budapest, Hungary
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16
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Herman L, Hubert P, Herfs M, Kustermans G, Henrotin Y, Bousarghin L, Boniver J, Delvenne P. The L1 major capsid protein of HPV16 differentially modulates APC trafficking according to the vaccination or natural infection context. Eur J Immunol 2010; 40:3075-84. [DOI: 10.1002/eji.201040571] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Hubert P, Doyen J, Capelle X, Arafa M, Renoux V, Bisig B, Seidel L, Evrard B, Bousarghin L, Gerday C, Boniver J, Foidart JM, Delvenne P, Jacobs N. Local applications of GM-CSF induce the recruitment of immune cells in cervical low-grade squamous intraepithelial lesions. Am J Reprod Immunol 2010; 64:126-36. [PMID: 20367631 DOI: 10.1111/j.1600-0897.2010.00834.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
PROBLEM Quantitative alterations of antigen-presenting cells (APC) in (pre)neoplastic lesions of the uterine cervix associated with human papillomavirus (HPV) infection suggest a diminished capacity to capture viral antigens and to induce a protective immune response. METHOD OF STUDY To test whether a cervical application of GM-CSF could restore an immune response against HPV in women with cervical low-grade squamous intraepithelial lesions (LSIL), we performed two clinical trials with 11 healthy women and 15 patients with LSIL. RESULTS GM-CSF applications were well tolerated in all enrolled women, and no difference in toxicity between the treated and placebo groups was observed during the follow-up (until 30 months). Interestingly, in the GM-CSF treated group, a significant increase of APC and cytotoxic T-lymphocyte infiltration was observed in the cervical biopsies with no change in regulatory T cell numbers. All the HPV16(+) patients exhibited an immune response against HPV16 after GM-CSF applications, as shown by NK and/or T cells producing IFN-gamma whereas no cellular immune response was observed before the treatment. Moreover, the anti-virus-like particles antibody titers also increased after the treatment. CONCLUSION These encouraging results obtained from a limited number of subjects justify further study on the therapeutic effect of APC in cervical (pre)neoplastic lesions.
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Affiliation(s)
- Pascale Hubert
- Department of Pathology, GIGA-CANCER/GIGA-I3, University of Liège, B23 CHU Sart-Tilman, Liège, Belgium
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18
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Le Gall S, Desbordes L, Gracieux P, Saffroy S, Bousarghin L, Bonnaure-Mallet M, Jolivet-Gougeon A. Distribution of mutation frequencies among Salmonella enterica isolates from animal and human sources and genetic characterization of a Salmonella Heidelberg hypermutator. Vet Microbiol 2009; 137:306-12. [DOI: 10.1016/j.vetmic.2009.01.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Revised: 01/08/2009] [Accepted: 01/12/2009] [Indexed: 01/11/2023]
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19
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Bousarghin L, Touze A, Gaud G, Iochmann S, Alvarez E, Reverdiau P, Gaitan J, Jourdan ML, Sizaret PY, Coursaget PL. Inhibition of cervical cancer cell growth by human papillomavirus virus-like particles packaged with human papillomavirus oncoprotein short hairpin RNAs. Mol Cancer Ther 2009; 8:357-65. [PMID: 19174559 DOI: 10.1158/1535-7163.mct-08-0626] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Overexpression of human papillomavirus (HPV E6 and HPV E7) oncogenes in human cervical cells results in the development of cancer, and E6 and E7 proteins are therefore targets for preventing cervical cancer progression. Here, we describe the silencing of E6 and E7 expression in cervical carcinoma cells by RNA interference. In order to increase the efficacy of the RNA interference, HPV pseudovirions coding for a short hairpin RNA (shRNA) sequence were produced. The results indicated the degradation of E6 and E7 mRNAs when shRNA against E6 or E7 were delivered by pseudovirions in HPV-positive cells (CaSki and TC1 cells). E6 silencing resulted in the accumulation of cellular p53 and reduced cell viability. More significant cell death was observed when E7 expression was suppressed. Silencing E6 and E7 and the consequences for cancer cell growth were also investigated in vivo in mice using the capacity of murine TC1 cells expressing HPV-16 E6 and E7 oncogenes to induce fast-growing tumors. Treatment with lentiviruses and HPV virus-like particle vectors coding for an E7 shRNA sequence both resulted in dramatic inhibition of tumor growth. These results show the ability of pseudovirion-delivered shRNA to produce specific gene suppression and provide an effective means of reducing HPV-positive tumor growth.
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20
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Gaud G, Iochmann S, Saulnier A, Ainciburu M, Bousarghin L, Gruel Y, Reverdiau P. 048 Effet de l’inhibition du TFPI-2 par micro ARN sur le potentiel invasif des cellules tumorales pulmonaires NCI-H460. Rev Mal Respir 2007. [DOI: 10.1016/s0761-8425(07)74339-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Le Guellec S, Montharu J, Renoux V, Vecellio L, Gaitan J, Bousarghin L, Touze A, Coates A, Diot P, Coursaget P. 086 Vaccination par voie inhalée contre le papillomavirus humain de type 16 chez la rate Sprague Dawley. Rev Mal Respir 2006. [DOI: 10.1016/s0761-8425(06)71914-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Hubert P, Bousarghin L, Greimers R, Franzen-Detrooz E, Boniver J, Delvenne P. Production of large numbers of Langerhans' cells with intraepithelial migration ability in vitro. Exp Dermatol 2005; 14:469-77. [PMID: 15885083 DOI: 10.1111/j.0906-6705.2005.00299.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Langerhans' cells (LCs) are a subset of immature dendritic cells (DCs) and play a key role in the initiation and regulation of immune responses. Functional studies of these cells have been hampered by difficulties in generating a large number of LCs in vitro. We describe a new method to efficiently generate immature DCs exhibiting morphological, immunohistochemical, and ultrastructural features of LCs (CD1a+, Birbeck Granules+, CD207+, E-cadherin+, cutaneous lymphocyte-associated antigen+, and CCR6+) from a limited number of CD34+ cord blood progenitors. This method is based on a two-step procedure consisting of an amplification phase followed by a terminal differentiation induction. The amplification step is initiated with a combination of hematopoietic growth factors (thrombopoietin/stem cell factor/fetal liver tyrosine kinase-3 ligand), cytokines (granulocyte-macrophage colony-stimulating factor, tumor necrosis factor-alpha, and interleukin-4), and 5 ng/ml of transforming growth factor (TGF)-beta1. The differentiation is induced by increasing the concentration of TGF-beta1 to 12.5 ng/ml. These culture conditions were efficient for generating a large number of immature LCs (8.74 x 10(6) +/- 3.2) from 15 x 10(4) CD34+ progenitor cells. In addition, these LCs were shown to be able to infiltrate an in vitro reconstructed epithelium. Because LCs play an important role in the mucosal immunity, this technique could be useful to study their interactions with epithelial pathogenic agents and to perform pharmacological, toxicological, and clinical research.
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Affiliation(s)
- Pascale Hubert
- Department of Pathology, CRCE, B35, University of Liege, CHU Sart Tilman, Liege, Belgium.
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23
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Bousarghin L, Hubert P, Franzen E, Jacobs N, Boniver J, Delvenne P. Human papillomavirus 16 virus-like particles use heparan sulfates to bind dendritic cells and colocalize with langerin in Langerhans cells. J Gen Virol 2005; 86:1297-1305. [PMID: 15831940 DOI: 10.1099/vir.0.80559-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Langerhans cells (LC), the immature dendritic cells (DC) that reside in epithelial tissues are among the first immune cells to encounter human papillomavirus (HPV) and are not activated by HPV virus-like particles (VLPs) in contrast to DC. The notion that the differences in response to HPV VLPs between LC and DC are associated with different types of cell binding and intracellular trafficking has been addressed. Inhibition experiments with heparin and sodium chlorate showed that heparan sulfates are necessary for HPV 16 VLPs to bind to DC but not to LC. Electron microscopy analysis demonstrated a colocalization of HPV 16 VLPs and langerin, which is expressed only by LC. This colocalization was observed on the cell surface but also in cytoplasmic vesicles. As anti-langerin antibodies, HPV 16 VLPs were associated with a faster entry kinetics in LC, as reflected by the fact that VLPs were observed near the nuclear membrane of LC within 10 min whereas more than 60 min were needed in DC. However, no difference between LC and DC was observed for the endocytosis pathway. HPV 16 VLPs entered in both DC and LC by a clathrin-dependent-pathway and were then localized in large cytoplasmic vesicles resembling endosomes.
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Affiliation(s)
- Latifa Bousarghin
- University Hospital of Liège, Department of Pathology, Tour de Pathologie B35, B-4000 Liège, Belgium
| | - Pascale Hubert
- University Hospital of Liège, Department of Pathology, Tour de Pathologie B35, B-4000 Liège, Belgium
| | - Elisabeth Franzen
- University Hospital of Liège, Department of Pathology, Tour de Pathologie B35, B-4000 Liège, Belgium
| | - Nathalie Jacobs
- Department of Virology, Faculty of Medicine, Imperial College London, St Mary's Campus, Norfolk Place, London W2 1PG, UK
- University Hospital of Liège, Department of Pathology, Tour de Pathologie B35, B-4000 Liège, Belgium
| | - Jacques Boniver
- University Hospital of Liège, Department of Pathology, Tour de Pathologie B35, B-4000 Liège, Belgium
| | - Philippe Delvenne
- University Hospital of Liège, Department of Pathology, Tour de Pathologie B35, B-4000 Liège, Belgium
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24
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Hubert P, Caberg JH, Gilles C, Bousarghin L, Franzen-Detrooz E, Boniver J, Delvenne P. E-cadherin-dependent adhesion of dendritic and Langerhans cells to keratinocytes is defective in cervical human papillomavirus-associated (pre)neoplastic lesions. J Pathol 2005; 206:346-55. [PMID: 15852499 DOI: 10.1002/path.1771] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Although human papillomavirus (HPV) DNA is detected in the majority of squamous intraepithelial lesions (SILs) and squamous cell carcinomas (SCCs) of the uterine cervix, the persistence and progression of cervical lesions suggest that viral antigens are not adequately presented to the immune system. This hypothesis is reinforced by the observation that most SILs show quantitative and functional alterations of Langerhans cells (LCs). The aim of this study was to determine whether modulation of E-cadherin-mediated homophilic and heterotypic interactions between keratinocytes and LCs is involved in these abnormalities of LCs in (pre)neoplastic cervical epithelium. Cell membrane expression of E-cadherin and the density of CD1a+ LCs were low in the epithelium of SILs and SCC biopsy specimens, compared with normal exocervical epithelium. Dendritic cells (DCs) and LCs generated in vitro were randomly distributed throughout the full thickness of organotypic cultures of E-cadherin- HPV-transformed cells. In contrast, these cells rapidly adhered to the keratinocyte cell layers when HPV-transformed cells transfected with E-cadherin were used. These data suggest that the E-cadherin-mediated contact between keratinocytes and LCs is potentially important for initiating or maintaining the immune response during chronic HPV infection.
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Affiliation(s)
- Pascale Hubert
- Department of Pathology, CRCE, B35, CHU Sart Tilman, 4000 Liège, Belgium
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25
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Bousarghin L, Touzé A, Yvonnet B, Coursaget P. Positively charged synthetic peptides from structural proteins of papillomaviruses abrogate human papillomavirus infectivity. J Med Virol 2004; 73:474-80. [PMID: 15170645 DOI: 10.1002/jmv.20114] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Human papillomavirus (HPV) virus-like particles (VLP) and synthetic peptides corresponding to positively-charged sequences of the major and minor capsid proteins were tested for their efficacy in inhibiting the infectivity of HPV 31 pseudovirions by blocking virus entry into cells. A greater than 80% reduction of transfection was observed with one HPV-31 peptide at a concentration of 10 microg/ml. Moreover, the blocking was not type-specific since similar reduction in transfection was observed with peptides from other HPV types at a concentration of 60 microg/ml. This concentration was non-toxic for the cells. These findings indicate that some of the positively-charged sequences of the L1 and L2 HPV capsid proteins of papillomavirus are compounds that might be locally active against sexually transmitted papillomavirus. The findings provide further evidence that cellular glycosamino-glycans (GAGs) are functional receptors for HPVs.
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Affiliation(s)
- Latifa Bousarghin
- Laboratoire de Virologie Moléculaire, INSERM U618, Faculté de Pharmacie, Tours, France
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26
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Newton R, Bousarghin L, Ziegler J, Casabonne D, Beral V, Mbidde E, Carpenter L, Parkin DM, Wabinga H, Mbulaiteye S, Jaffe H, Touzé A, Coursaget P. Human papillomaviruses and cancer in Uganda. Eur J Cancer Prev 2004; 13:113-8. [PMID: 15100577 DOI: 10.1097/00008469-200404000-00004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In a case-control study in Uganda, we examined associations between different cancer sites or types in relation to antibodies against human papillomaviruses (HPV)-16, -18 and -45. For each cancer site or type, the control group comprised all other cancers excluding those known, or thought to be associated with HPV infection (cancers of the uterine cervix, penis and eye). Among controls the seroprevalence of antibodies was 11% (68/616) against HPV-16, 5% (29/605) against HPV-18 and 6% (35/605) against HPV-45. Antibodies against HPV-16 were significantly associated with only two cancers: uterine cervix [prevalence of antibodies 27% (51/191); odds ratio (OR) 2.0, 95% confidence interval (CI) 1.2-3.1, P=0.01] and penis [prevalence of antibodies 27% (4/15); OR 6.4, 95% CI 1.7-24.3, P=0.01]. For both cancers, the risk increased with increasing anti-HPV-16 antibody titre (Ptrend=0.01 for each). No cancer site or type was significantly associated with antibodies against HPV-18 and -45.
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Affiliation(s)
- R Newton
- Cancer Research UK, Epidemiology Unit, Gibson Building, Radcliffe Infirmary, Oxford, OX2 6HE, UK.
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Waddell K, Magyezi J, Bousarghin L, Coursaget P, Lucas S, Downing R, Casabonne D, Newton R. Antibodies against human papillomavirus type 16 (HPV-16) and conjunctival squamous cell neoplasia in Uganda. Br J Cancer 2003; 88:2002-3. [PMID: 12799649 PMCID: PMC2741101 DOI: 10.1038/sj.bjc.6600950] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Abstract
The early steps of the intracellular trafficking of human papillomavirus type 16 (HPV-16), -31, and -58 pseudovirions were studied by investigating the effects of drugs acting at defined points of endocytosis pathways on virus-like particle-mediated pseudoinfection by overexpression of a dominant-negative form of the Eps15 protein to inhibit clathrin-mediated endocytosis and by electron microscopy. The results obtained suggested the involvement of clathrin-mediated endocytosis in HPV-16 and HPV-58 entry and caveola-mediated endocytosis in HPV-31 entry.
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Affiliation(s)
- Latifa Bousarghin
- Laboratoire de Virologie Moléculaire, INSERM EMIU 00-10 et USC INRA, Faculté des Sciences Pharmaceutiques, Tours, France
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Bousarghin L, Touzé A, Combita-Rojas AL, Coursaget P. Positively charged sequences of human papillomavirus type 16 capsid proteins are sufficient to mediate gene transfer into target cells via the heparan sulfate receptor. J Gen Virol 2003; 84:157-164. [PMID: 12533712 DOI: 10.1099/vir.0.18789-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Using synthetic peptides we have shown that positively charged sequences present at the C terminus of the L1 protein and the N and C termini of the L2 protein of human papillomavirus type 16 (HPV-16) bind to both DNA and heparan sulfate receptors. Moreover, these short amino acid sequences are sufficient to mediate gene transfer in COS-7 cells. The L1 proteins of other HPVs were shown to contain one or two DNA- and heparin-binding sequences that have the capacity to transfer genes. These DNA-binding sequences also recognized the enhancing packaging sequence of bovine papillomavirus type 1. The results suggest that the L2 protein could participate in DNA packaging during maturation of virions.
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Affiliation(s)
- Latifa Bousarghin
- Laboratoire de Virologie Moléculaire, INSERM EMIU 00-10 and USC INRA, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France
| | - Antoine Touzé
- Laboratoire de Virologie Moléculaire, INSERM EMIU 00-10 and USC INRA, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France
| | - Alba-Lucia Combita-Rojas
- Laboratoire de Virologie Moléculaire, INSERM EMIU 00-10 and USC INRA, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France
| | - Pierre Coursaget
- Laboratoire de Virologie Moléculaire, INSERM EMIU 00-10 and USC INRA, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France
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Newton R, Ziegler J, Ateenyi-Agaba C, Bousarghin L, Casabonne D, Beral V, Mbidde E, Carpenter L, Reeves G, Parkin DM, Wabinga H, Mbulaiteye S, Jaffe H, Bourboulia D, Boshoff C, Touzé A, Coursaget P. The epidemiology of conjunctival squamous cell carcinoma in Uganda. Br J Cancer 2002; 87:301-8. [PMID: 12177799 PMCID: PMC2364227 DOI: 10.1038/sj.bjc.6600451] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2002] [Revised: 04/19/2002] [Accepted: 04/22/2002] [Indexed: 11/08/2022] Open
Abstract
As part of a larger investigation of cancer in Uganda, we conducted a case-control study of conjunctival squamous cell carcinoma in adults presenting at hospitals in Kampala. Participants were interviewed about social and lifestyle factors and had blood tested for antibodies to HIV, KSHV and HPV-16, -18 and -45. The odds of each factor among 60 people with conjunctival cancer was compared to that among 1214 controls with other cancer sites or types, using odds ratios, estimated with unconditional logistic regression. Conjunctival cancer was associated with HIV infection (OR 10.1, 95% confidence intervals [CI] 5.2-19.4; P<0.001), and was less common in those with a higher personal income (OR=0.4, 95% CI 0.3-0.7; P<0.001)[corrected]. The risk of conjunctival cancer increased with increasing time spent in cultivation and therefore in direct sunlight (chi2 trend=3.9, P=0.05), but decreased with decreasing age at leaving home (chi2 trend=3.9, P=0.05), perhaps reflecting less exposure to sunlight consequent to working in towns, although both results were of borderline statistical significance. To reduce confounding, sexual and reproductive variables were examined among HIV seropositive individuals only. Cases were more likely than controls to report that they had given or received gifts for sex (OR 3.5, 95% CI 1.2-10.4; P=0.03), but this may have been a chance finding as no other sexual or reproductive variable was associated with conjunctival cancer, including the number of self-reported lifetime sexual partners (P=0.4). The seroprevalence of antibodies against HPV-18 and -45 was too low to make reliable conclusions. The presence of anti-HPV-16 antibodies was not significantly associated with squamous cell carcinoma of the conjunctiva (OR 1.5, 95% CI 0.5-4.3; P=0.5) and nor were anti-KSHV antibodies (OR 0.9, 95% CI 0.4-2.1; P=0.8). The 10-fold increased risk of conjunctival cancer in HIV infected individuals is similar to results from other studies. The role of other oncogenic viral infections is unclear.
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Affiliation(s)
- R Newton
- Cancer Research UK, Epidemiology Unit, Gibson Building, Radcliffe Infirmary, Oxford OX2 6HE, UK
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Combita AL, Touzé A, Bousarghin L, Christensen ND, Coursaget P. Identification of two cross-neutralizing linear epitopes within the L1 major capsid protein of human papillomaviruses. J Virol 2002; 76:6480-6. [PMID: 12050360 PMCID: PMC136273 DOI: 10.1128/jvi.76.13.6480-6486.2002] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The neutralizing activities of polyclonal antibodies and monoclonal antibodies (MAbs) obtained by immunization of mice with L1 virus-like particles (VLPs) were investigated by using pseudovirion infectivity assays for human papillomavirus type 16 (HPV-16), HPV-31, HPV-33, HPV-45, HPV-58, and HPV-59 to obtain a better definition of cross-neutralization between high-risk HPVs. In this study, we confirmed and extended previous studies indicating that most genital HPV genotypes represent separate serotypes, and the results suggest that the classification of serotypes is similar to that of genotypes. In addition, three cross-neutralizing MAbs were identified (HPV-16.J4, HPV-16.I23, and HPV-33.E12). MAb HPV-16.J4 recognized a conserved linear epitope located within the FG loop of the L1 protein, and HPV-16.I23 recognized another located within the DE loop. The results suggested that reactivity of MAb HPV-16.I23 to L1 protein is lost when leucine 152 of the HPV-16 L1 protein is replaced by phenylalanine. This confirmed the existence of linear epitopes within the L1 protein that induce neutralizing antibodies, and this is the first evidence that such linear epitopes induce cross-neutralization. However, the cross-neutralization induced by L1 VLPs represents less than 1% of the neutralizing activity induced by the dominant conformational epitopes, and it is questionable whether this is sufficient to offer cross-protection in vivo.
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Affiliation(s)
- Alba-Lucia Combita
- Laboratoire de Virologie Moléculaire, INSERM EMIU 00-10 and USC INRA, Philippe Maupas Faculté des Sciences Pharmaceutiques, 31 Avenue Monge, 37200 Tours, France
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Bousarghin L, Combita-Rojas AL, Touzé A, El Mehdaoui S, Sizaret PY, Bravo MM, Coursaget P. Detection of neutralizing antibodies against human papillomaviruses (HPV) by inhibition of gene transfer mediated by HPV pseudovirions. J Clin Microbiol 2002; 40:926-32. [PMID: 11880418 PMCID: PMC120236 DOI: 10.1128/jcm.40.3.926-932.2002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The goal of this study was to develop a human papillomavirus (HPV) neutralization assay using HPV pseudovirions generated in vitro. For this purpose, gene transfer efficiency of HPV virus-like particles (VLPs) was improved by using direct interaction between a reporter plasmid and the VLPs. Electron microscopic observation of the interaction between DNA molecules and VLPs revealed that VLPs always interact with a single DNA molecule and that VLPs bind to the end of linearized DNA molecules. An 100-fold improvement in the gene transfer was obtained by simple interaction between a linearized DNA molecule and VLPs. Moreover, direct interaction methods offer the possibility of transferring plasmids a size higher than that of the papillomavirus genome. The approach that we developed to generate HPV-16 and HPV-31 pseudovirions proved to be suitable for testing neutralizing antibodies in human sera both after immunization and after natural infection.
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Affiliation(s)
- Latifa Bousarghin
- Laboratoire de Virologie Moléculaire, INSERM EMIU 00-10, Tours, France
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Touzé A, Bousarghin L, Ster C, Combita AL, Roingeard P, Coursaget P. Gene transfer using human polyomavirus BK virus-like particles expressed in insect cells. J Gen Virol 2001; 82:3005-3009. [PMID: 11714977 DOI: 10.1099/0022-1317-82-12-3005] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The major structural protein (VP1) of the BK polyomavirus (BKV) was expressed in the recombinant baculovirus expression system. Recombinant BKV VP1 was shown to self-assemble into virus-like particles (VLPs) with a diameter of 45-50 nm. As for other polyomaviruses, BKV VP1 has the capacity to bind to exogenous DNA. Furthermore, the potential of BKV VP1 VLPs was investigated for gene transfer into COS-7 cells using three methods for the formation of pseudo-virions: disassembly/reassembly, osmotic shock and direct interaction between VLPs and reporter plasmid DNA. The latter method was shown to be the most efficient when using linearized plasmid. Gene transfer efficiency with BKV pseudo-virions was of the same order as that observed with human papillomavirus type 16 L1 protein VLPs. In addition, it is demonstrated that cellular entry of BKV pseudo-virions is dependent on cell surface sialic acid.
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Affiliation(s)
- Antoine Touzé
- Laboratoire de Virologie Moléculaire, EMI-U 00-10 Protéases et Vectorisation, IFR Transposons et Virus, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France1
| | - Latifa Bousarghin
- Laboratoire de Virologie Moléculaire, EMI-U 00-10 Protéases et Vectorisation, IFR Transposons et Virus, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France1
| | - Céline Ster
- Laboratoire de Virologie Moléculaire, EMI-U 00-10 Protéases et Vectorisation, IFR Transposons et Virus, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France1
| | - Alba-Lucia Combita
- Laboratoire de Virologie Moléculaire, EMI-U 00-10 Protéases et Vectorisation, IFR Transposons et Virus, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France1
| | - Philippe Roingeard
- Laboratoires de Biologie Cellulaire et Virologie, EA 2639, Analyse Structurale des Antigènes, IFR Transposons et Virus, Faculté de Médecine, 2 bis Boulevard Tonnellé, 37032 Tours cedex, France2
| | - Pierre Coursaget
- Laboratoire de Virologie Moléculaire, EMI-U 00-10 Protéases et Vectorisation, IFR Transposons et Virus, Faculté des Sciences Pharmaceutiques 'Philippe Maupas', 31 avenue Monge, 37200 Tours, France1
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Combita AL, Touzé A, Bousarghin L, Sizaret PY, Muñoz N, Coursaget P. Gene transfer using human papillomavirus pseudovirions varies according to virus genotype and requires cell surface heparan sulfate. FEMS Microbiol Lett 2001; 204:183-8. [PMID: 11682199 DOI: 10.1111/j.1574-6968.2001.tb10883.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Artificial viruses consisting of DNA plasmid packaged in vitro into virus-like particles (VLPs) are new vehicles for gene transfer. We therefore investigated the ability of nine human papillomavirus (HPV) VLPs to interact with heterologous DNA and transfer genes. HPV 16, 18, 31, 33, 39, 45, 58, 59, and 68 VLPs were able to bind heterologous DNA and to transfer genes into Cos-7 cells. Inhibition of gene transfer by preincubation of the pseudovirions with heparin confirmed that heparan sulfate on the cell surface plays a role as cell receptor for HPVs. As HPV neutralizing antibodies are mainly type-specific, gene transfer with different HPV pseudovirions offers the possibility of their sequential use in vivo for a greater efficacy.
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Affiliation(s)
- A L Combita
- Laboratoire de Virologie Moléculaire, INSERM EMIU 00-10, Faculté des Sciences Pharmaceutiques P. Maupas, 31 avenue Monge, 37200 Tours, France
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Touzé A, Mahé D, El Mehdaoui S, Dupuy C, Combita-Rojas AL, Bousarghin L, Sizaret PY, Coursaget P. The nine C-terminal amino acids of the major capsid protein of the human papillomavirus type 16 are essential for DNA binding and gene transfer capacity. FEMS Microbiol Lett 2000; 189:121-7. [PMID: 10913877 DOI: 10.1111/j.1574-6968.2000.tb09217.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Four C-terminal deletion mutants of the human papillomavirus 16 L1 protein were expressed in the baculovirus expression system. They consist of the deletion of amino acids 497-505, 477-505, 403-505 and 302-505 (delta C9, delta C31, delta C103 and delta C204 respectively). Only two of the C-terminally deleted proteins, delta C9 and delta C31, retained the ability to form virus-like particles (VLPs) resembling those obtained with the full length L1 protein. Analysis of deleted L1 proteins and corresponding VLPs indicated that the C-terminus was necessary both for DNA binding and DNA packaging. These results were corroborated by the loss of the gene transfer capacities of C-terminal deleted VLPs.
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Affiliation(s)
- A Touzé
- Laboratoire de Virologie Moléculaire, Faculté des Sciences Pharmaceutiques Phillipe Maupas, Tours, France
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