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Negi G, Sharma A, Chaudhary M, Parveen N. Disruption Mechanisms of Enveloped Viruses by Ionic and Nonionic Surfactants. J Phys Chem B 2024; 128:768-780. [PMID: 38228291 DOI: 10.1021/acs.jpcb.3c05531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
The world has witnessed multiple pandemics and endemics caused by enveloped viruses in the past century. To name a few, the ongoing COVID-19 pandemic and other pandemics/endemics caused by coronaviruses, influenza viruses, HIV-1, etc. The external and topical applications of surfactants have been effective in limiting the spread of viruses. While it is well-known that surfactants inactivate virus particles (virions), the mechanism of action of surfactants against enveloped virions has not yet been established. In this work, we have evaluated the surfactant-induced disruption mechanism of a cocktail of enveloped viruses containing particles of mumps, measles, and rubella viruses. We applied the total internal reflection fluorescence microscopy technique to trace the temporal changes in the fluorescence signal from single virions upon the addition of a surfactant solution. We report that surfactants solubilize either the viral lipid membrane, proteins, or both. Ionic surfactants, depending on their charge and interaction type with the viral lipids and proteins, can cause bursting or perforation of the viral envelope, whereas a nonionic surfactant can cause either symmetric expansion or perforation of the viral envelope depending on the surfactant concentration.
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Affiliation(s)
- Geetanjali Negi
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, India
| | - Anurag Sharma
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, India
| | - Monika Chaudhary
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, India
| | - Nagma Parveen
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, India
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2
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Wright BL, Masuda MY, Ortiz DR, Dao A, Civello B, Pyon GC, Schulze AR, Yiannas JA, Rank MA, Kita H, Doyle AD. Allergies Come Clean: The Role of Detergents in Epithelial Barrier Dysfunction. Curr Allergy Asthma Rep 2023; 23:443-451. [PMID: 37233851 PMCID: PMC10527525 DOI: 10.1007/s11882-023-01094-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2023] [Indexed: 05/27/2023]
Abstract
PURPOSE OF REVIEW The prevalence and incidence of allergic disease have been rising in Westernized countries since the twentieth century. Increasingly, evidence suggests that damage to the epithelium initiates and shapes innate and adaptive immune responses to external antigens. The objective of this review is to examine the role of detergents as a potential risk factor for developing allergic disease. RECENT FINDINGS Herein, we identify key sources of human detergent exposure. We summarize the evidence suggesting a possible role for detergents and related chemicals in initiating epithelial barrier dysfunction and allergic inflammation. We primarily focus on experimental models of atopic dermatitis, asthma, and eosinophilic esophagitis, which show compelling associations between allergic disease and detergent exposure. Mechanistic studies suggest that detergents disrupt epithelial barrier integrity through their effects on tight junction or adhesion molecules and promote inflammation through epithelial alarmin release. Environmental exposures that disrupt or damage the epithelium may account for the increasing rates of allergic disease in genetically susceptible individuals. Detergents and related chemical compounds represent possible modifiable risk factors for the development or exacerbation of atopy.
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Affiliation(s)
- Benjamin L Wright
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA.
- Section of Allergy and Immunology, Division of Pulmonology, Phoenix Children's Hospital, Phoenix, AZ, USA.
| | - Mia Y Masuda
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA
- Department of Immunology, Mayo Clinic, Mayo Clinic Arizona, Rochester, Scottsdale, Minnesota, AZ, USA
| | - Danna R Ortiz
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - Adelyn Dao
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - Blake Civello
- University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - Grace C Pyon
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - Aliviya R Schulze
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - James A Yiannas
- Department of Dermatology, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - Matthew A Rank
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA
- Section of Allergy and Immunology, Division of Pulmonology, Phoenix Children's Hospital, Phoenix, AZ, USA
| | - Hirohito Kita
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA
- Section of Allergy and Immunology, Division of Pulmonology, Phoenix Children's Hospital, Phoenix, AZ, USA
| | - Alfred D Doyle
- Division of Allergy, Asthma, and Clinical Immunology, Department of Medicine, Mayo Clinic Arizona, Scottsdale, AZ, USA
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Riveira-Muñoz E, Garcia-Vidal E, Bañó-Polo M, León R, Blanc V, Clotet B, Ballana E. Cetylpyridinium Chloride-Containing Mouthwashes Show Virucidal Activity against Herpes Simplex Virus Type 1. Viruses 2023; 15:1433. [PMID: 37515121 PMCID: PMC10383790 DOI: 10.3390/v15071433] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/16/2023] [Accepted: 06/22/2023] [Indexed: 07/30/2023] Open
Abstract
The oral cavity is particularly susceptible to viral infections that are self-recovering in most cases. However, complications may appear in severe cases and/or immunocompromised subjects. Cetylpyridinium chloride (CPC)-containing mouthwashes are able to decrease the infectivity of the SARS-CoV-2 virus by disrupting the integrity of the viral envelope. Here, we show that CPC, as the active ingredient contained in commercialized, exerts significant antiviral activity against enveloped viruses, such as HSV-1, but not against non-enveloped viruses, such as HPV. CPC-containing mouthwashes have been used as antiseptics for decades, and thus, they can represent a cost-effective measure to limit infection and spread of enveloped viruses infecting the oral cavity, aiding in reducing viral transmission.
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Affiliation(s)
- Eva Riveira-Muñoz
- IrsiCaixa AIDS Research Institute, Health Research Institute Germans Trias i Pujol (IGTP), Hospital Germans Trias i Pujol, Universitat Autònoma de Barcelona, 08916 Badalona, Spain
| | - Edurne Garcia-Vidal
- IrsiCaixa AIDS Research Institute, Health Research Institute Germans Trias i Pujol (IGTP), Hospital Germans Trias i Pujol, Universitat Autònoma de Barcelona, 08916 Badalona, Spain
| | - Manuel Bañó-Polo
- Department of Microbiology, Dentaid Research Center, 08290 Cerdanyola del Vallès, Spain
| | - Rubén León
- Department of Microbiology, Dentaid Research Center, 08290 Cerdanyola del Vallès, Spain
| | - Vanessa Blanc
- Department of Microbiology, Dentaid Research Center, 08290 Cerdanyola del Vallès, Spain
| | - Bonaventura Clotet
- IrsiCaixa AIDS Research Institute, Health Research Institute Germans Trias i Pujol (IGTP), Hospital Germans Trias i Pujol, Universitat Autònoma de Barcelona, 08916 Badalona, Spain
| | - Ester Ballana
- IrsiCaixa AIDS Research Institute, Health Research Institute Germans Trias i Pujol (IGTP), Hospital Germans Trias i Pujol, Universitat Autònoma de Barcelona, 08916 Badalona, Spain
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4
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Bouchard S, Paniconi T, Jubinville É, Goulet-Beaulieu V, Goetz C, Marchand P, Jean J. Inactivation of foodborne viruses by novel organic peroxyacid-based disinfectants. Front Microbiol 2023; 14:1187142. [PMID: 37250052 PMCID: PMC10213756 DOI: 10.3389/fmicb.2023.1187142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 04/24/2023] [Indexed: 05/31/2023] Open
Abstract
Viruses are responsible for most enteric foodborne illnesses worldwide. The foods most frequently involved are fresh fruits and vegetables since they undergo little or no processing. Washing with a chemical disinfectant is a convenient way of inactivating viruses on foods. Peracetic acid, widely used as a disinfectant in the food industry, has the drawback of leaving a strong odor and is ineffective alone against some foodborne viruses. In this study, four disinfectants, namely per levulinic acid with or without sodium dodecyl sulfate, peracetic acid and a commercial peracetic acid-based disinfectant were tested on murine norovirus 1 (MNV-1), hepatitis A virus (HAV), and hepatitis E virus (HEV). Disinfectant concentrations were 50, 80, 250, 500, and 1000 mg l-1 and contact times were 0.5, 1, 5, and 10 min. Under these conditions, per levulinic acid supplemented with 1% SDS reduced MNV-1 infectious titer by 3 log cycles vs. 2.24 log cycles by peracetic acid within 0.5 min. On stainless steel at 80 ppm, only peracetic acid produced 3-log reductions within 0.5 min. None of these peroxyacids was able to reduce infectious titers of HAV or HEV by even 2 log cycles at any concentration or time-tested. This study will guide the development of new chemical formulas that will be more effective against major foodborne viruses and will have less impact on food quality and the environment.
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Affiliation(s)
- Simon Bouchard
- Département des Sciences des Aliments, Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Université Laval, Québec, QC, Canada
| | - Teresa Paniconi
- Département des Sciences des Aliments, Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Université Laval, Québec, QC, Canada
| | - Éric Jubinville
- Département des Sciences des Aliments, Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Université Laval, Québec, QC, Canada
| | - Valérie Goulet-Beaulieu
- Département des Sciences des Aliments, Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Université Laval, Québec, QC, Canada
| | - Coralie Goetz
- Département des Sciences des Aliments, Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Université Laval, Québec, QC, Canada
| | | | - Julie Jean
- Département des Sciences des Aliments, Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Université Laval, Québec, QC, Canada
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Usseglio N, Onnainty R, Konigheim B, Aguilar J, Petiti JP, Lingua G, Leimgruber C, Bonafé Allende JC, Torres A, Granero G. Cuprous oxide nanoparticles incorporated into a polymeric matrix embedded in fabrics to prevent spread of SARS-CoV-2. Int J Pharm 2023; 636:122790. [PMID: 36863542 PMCID: PMC9974211 DOI: 10.1016/j.ijpharm.2023.122790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 02/24/2023] [Accepted: 02/25/2023] [Indexed: 03/04/2023]
Abstract
This paper describes the development of a coating for cotton and polypropylene (PP) fabrics based on a polymeric matrix embedded with cuprous oxide nanoparticles (Cu2O@SDS NPs) in order to inactivate SARS-CoV-2 and manufactured by a simple process using a dip-assisted layer-by-layer technology, at low curing temperature and without the need for expensive equipment, capable of achieving disinfection rates of up to 99%. The polymeric bilayer coating makes the surface of the fabrics hydrophilic, enabling the transportation of the virus-infected droplets to achieve the rapid inactivation of SARS-CoV-2 by contact with the Cu2O@SDS NPs incorporated in the coated fabrics.
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Affiliation(s)
- Nadina Usseglio
- Unidad de Investigaciones y Desarrollo en Tecnología Farmacéutica (UNITEFA) -CONICET, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina
| | - Renée Onnainty
- Unidad de Investigaciones y Desarrollo en Tecnología Farmacéutica (UNITEFA) -CONICET, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina
| | - Brenda Konigheim
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Instituto de Virología "Dr. J. M. Vanella"- Argentina, Enfermera Gordillo S/N, Ciudad Universitaria, X5000HUA Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Javier Aguilar
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Instituto de Virología "Dr. J. M. Vanella"- Argentina, Enfermera Gordillo S/N, Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | - Juan Pablo Petiti
- Instituto de Investigaciones en Ciencias de la Salud (INICSA)-CONICET, Centro de Microscopía Electrónica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina
| | - Giuliana Lingua
- Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Instituto de Virología "Dr. J. M. Vanella"- Argentina, Enfermera Gordillo S/N, Ciudad Universitaria, X5000HUA Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Carolina Leimgruber
- Instituto de Investigaciones en Ciencias de la Salud (INICSA)-CONICET, Centro de Microscopía Electrónica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina
| | - Juan Cruz Bonafé Allende
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, IPQA-CONICET, Universidad Nacional de Córdoba, Argentina
| | - Alicia Torres
- Instituto de Investigaciones en Ciencias de la Salud (INICSA)-CONICET, Centro de Microscopía Electrónica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina
| | - Gladys Granero
- Unidad de Investigaciones y Desarrollo en Tecnología Farmacéutica (UNITEFA) -CONICET, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina.
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Avelin V, Sissonen S, Julkunen I, Österlund P. Inactivation efficacy of H5N1 avian influenza virus by commonly used sample preparation reagents for safe laboratory practices. J Virol Methods 2022; 304:114527. [DOI: 10.1016/j.jviromet.2022.114527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 11/15/2022]
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7
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Ezzatpanah H, Gómez-López VM, Koutchma T, Lavafpour F, Moerman F, Mohammadi M, Raheem D. Risks and new challenges in the food chain: Viral contamination and decontamination from a global perspective, guidelines, and cleaning. Compr Rev Food Sci Food Saf 2022; 21:868-903. [PMID: 35142438 DOI: 10.1111/1541-4337.12899] [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: 04/08/2021] [Revised: 11/10/2021] [Accepted: 12/08/2021] [Indexed: 11/27/2022]
Abstract
Even during the continuing world pandemic of severe acute respiratory syndrome coronavirus 2 (SARS CoV-2), consumers remain exposed to the risk of getting infected by existing, emerging, or re-emerging foodborne and waterborne viruses. SARS-CoV-2 is different in that it is transmitted directly via the airborne route (droplets and aerosols) or indirect contact (surfaces contaminated with SARS-CoV-2). International food and health organizations and national regulatory bodies have provided guidance to protect individuals active in food premises from potential occupational exposure to SARS-CoV-2, and have recommended chemicals effective in controlling the virus. Additionally, to exclude transmission of foodborne and waterborne viruses, hygiene practices to remove viral contaminants from surfaces are applied in different stages of the food chain (e.g., food plants, food distribution, storage, retail sector, etc.), while new and enhanced measures effective in the control of all types of viruses are under development. This comprehensive review aims to analyze and compare efficacies of existing cleaning practices currently used in the food industry to remove pathogenic viruses from air, nonfood, and food contact surfaces, as well as from food surfaces. In addition, the classification, modes of transmission, and survival of food and waterborne viruses, as well as SARS-CoV-2 will be presented. The international guidelines and national regulations are summarized in terms of virucidal chemical agents and their applications.
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Affiliation(s)
- Hamid Ezzatpanah
- Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Tatiana Koutchma
- Guelph Research and Development Center, Agriculture and Agri-Food Canada, Guelph, Ontario, Canada
| | | | - Frank Moerman
- Department of Chemistry, Catholic University of Leuven - KU Leuven, Leuven, Belgium
| | | | - Dele Raheem
- Arctic Centre (NIEM), University of Lapland, Rovaniemi, Finland
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8
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Danis-Wlodarczyk KM, Cai A, Chen A, Gittrich MR, Sullivan MB, Wozniak DJ, Abedon ST. Friends or Foes? Rapid Determination of Dissimilar Colistin and Ciprofloxacin Antagonism of Pseudomonas aeruginosa Phages. Pharmaceuticals (Basel) 2021; 14:1162. [PMID: 34832944 PMCID: PMC8624478 DOI: 10.3390/ph14111162] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 12/14/2022] Open
Abstract
Phage therapy is a century-old technique employing viruses (phages) to treat bacterial infections, and in the clinic it is often used in combination with antibiotics. Antibiotics, however, interfere with critical bacterial metabolic activities that can be required by phages. Explicit testing of antibiotic antagonism of phage infection activities, though, is not a common feature of phage therapy studies. Here we use optical density-based 'lysis-profile' assays to assess the impact of two antibiotics, colistin and ciprofloxacin, on the bactericidal, bacteriolytic, and new-virion-production activities of three Pseudomonas aeruginosa phages. Though phages and antibiotics in combination are more potent in killing P. aeruginosa than either acting alone, colistin nevertheless substantially interferes with phage bacteriolytic and virion-production activities even at its minimum inhibitory concentration (1× MIC). Ciprofloxacin, by contrast, has little anti-phage impact at 1× or 3× MIC. We corroborate these results with more traditional measures, particularly colony-forming units, plaque-forming units, and one-step growth experiments. Our results suggest that ciprofloxacin could be useful as a concurrent phage therapy co-treatment especially when phage replication is required for treatment success. Lysis-profile assays also appear to be useful, fast, and high-throughput means of assessing antibiotic antagonism of phage infection activities.
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Affiliation(s)
| | - Alice Cai
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA; (A.C.); (A.C.); (M.R.G.); (M.B.S.)
| | - Anna Chen
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA; (A.C.); (A.C.); (M.R.G.); (M.B.S.)
| | - Marissa R. Gittrich
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA; (A.C.); (A.C.); (M.R.G.); (M.B.S.)
| | - Matthew B. Sullivan
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA; (A.C.); (A.C.); (M.R.G.); (M.B.S.)
- Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Daniel J. Wozniak
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210, USA;
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA; (A.C.); (A.C.); (M.R.G.); (M.B.S.)
| | - Stephen T. Abedon
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA; (A.C.); (A.C.); (M.R.G.); (M.B.S.)
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Omar RF, Leboeuf M, Lemyre M, Chabot I, Trottier S, Ulmann A, Bergeron MG. A Pre-Phase III Efficacy Trial of the Spermicide/Contraceptive Effect of the Invisible Condom, a Non-Hormonal Vaginal Gel, in Women From Canada. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2021; 44:175-181. [PMID: 34656768 DOI: 10.1016/j.jogc.2021.09.018] [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: 05/21/2021] [Revised: 09/14/2021] [Accepted: 09/14/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVES To evaluate the spermicidal efficacy of non-hormonal vaginal gel in vitro and in a post-coital test, and to evaluate its contraceptive efficacy in Canadian women of childbearing age. METHODS We conducted single-centre trial to assess spermicidal and contraceptive efficacy of vaginal gel. Participants were healthy, sexually active women aged 18-49 years and their regular male sexual partners (30 couples). Measured outcomes included effect of vaginal gel on sperm motility in vitro, its effect on sperm in a post-coital test, and its effect on pregnancy prevention over 3 months. RESULTS For in vitro spermicidal effect, 98% and 67% of sperm were immotile in the presence of the gel with sodium lauryl sulfate (gel-SLS) and gel alone, respectively. For the post-coital test, 99% and 93% of sperm were immotile in the presence of gel-SLS and gel alone, respectively. In the second part of trial, a total of 410 instances of vaginal intercourse in 95 menstrual cycles were protected (during 3-month period of gel-SLS use before each sexual intercourse with probability of 24 conceptions prevented according to Wilcox's table). Four women became pregnant during the study period; 2 during unprotected vaginal intercourse around the time of ovulation, and 2 attributed to user failure. CONCLUSION Based on our results, the vaginal gel demonstrated important spermicidal and contraceptive effect. A larger phase III contraceptive efficacy trial is warranted. The vaginal gel may represent a non-hormonal spermicide/contraceptive option for women.
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Affiliation(s)
- Rabeea F Omar
- Centre de Recherche en Infectiologie de l'Universite Laval, CHU de Québec-Université Laval, CHUL Hospital, Québec City, QC.
| | - Mathieu Leboeuf
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Université Laval, Québec City, QC; Department of Obstetrics and Gynaecology, CHU de Québec-Université Laval, CHUL Hospital, Québec City, QC
| | - Madeleine Lemyre
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Université Laval, Québec City, QC; Department of Obstetrics and Gynaecology, CHU de Québec-Université Laval, CHUL Hospital, Québec City, QC
| | - Isabelle Chabot
- Centre de Recherche en Infectiologie de l'Universite Laval, CHU de Québec-Université Laval, CHUL Hospital, Québec City, QC
| | - Sylvie Trottier
- Centre de Recherche en Infectiologie de l'Universite Laval, CHU de Québec-Université Laval, CHUL Hospital, Québec City, QC
| | | | - Michel G Bergeron
- Centre de Recherche en Infectiologie de l'Universite Laval, CHU de Québec-Université Laval, CHUL Hospital, Québec City, QC
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10
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Carse S, Bergant M, Schäfer G. Advances in Targeting HPV Infection as Potential Alternative Prophylactic Means. Int J Mol Sci 2021; 22:2201. [PMID: 33672181 PMCID: PMC7926419 DOI: 10.3390/ijms22042201] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/15/2021] [Accepted: 02/19/2021] [Indexed: 01/22/2023] Open
Abstract
Infection by oncogenic human papillomavirus (HPV) is the primary cause of cervical cancer and other anogenital cancers. The majority of cervical cancer cases occur in low- and middle- income countries (LMIC). Concurrent infection with Human Immunodeficiency Virus (HIV) further increases the risk of HPV infection and exacerbates disease onset and progression. Highly effective prophylactic vaccines do exist to combat HPV infection with the most common oncogenic types, but the accessibility to these in LMIC is severely limited due to cost, difficulties in accessing the target population, cultural issues, and maintenance of a cold chain. Alternative preventive measures against HPV infection that are more accessible and affordable are therefore also needed to control cervical cancer risk. There are several efforts in identifying such alternative prophylactics which target key molecules involved in early HPV infection events. This review summarizes the current knowledge of the initial steps in HPV infection, from host cell-surface engagement to cellular trafficking of the viral genome before arrival in the nucleus. The key molecules that can be potentially targeted are highlighted, and a discussion on their applicability as alternative preventive means against HPV infection, with a focus on LMIC, is presented.
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Affiliation(s)
- Sinead Carse
- International Centre for Genetic Engineering and Biotechnology (ICGEB) Cape Town, Observatory 7925, South Africa;
- Institute of Infectious Disease and Molecular Medicine (IDM), Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa
- Division of Medical Biochemistry and Structural Biology, Department of Integrative Biomedical Sciences, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa
| | - Martina Bergant
- Laboratory for Environmental and Life Sciences, University of Nova Gorica, Vipavska 13, 5000 Nova Gorica, Slovenia;
| | - Georgia Schäfer
- International Centre for Genetic Engineering and Biotechnology (ICGEB) Cape Town, Observatory 7925, South Africa;
- Institute of Infectious Disease and Molecular Medicine (IDM), Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa
- Division of Medical Biochemistry and Structural Biology, Department of Integrative Biomedical Sciences, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa
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11
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Anestopoulos I, Kiousi DE, Klavaris A, Galanis A, Salek K, Euston SR, Pappa A, Panayiotidis MI. Surface Active Agents and Their Health-Promoting Properties: Molecules of Multifunctional Significance. Pharmaceutics 2020; 12:E688. [PMID: 32708243 PMCID: PMC7407150 DOI: 10.3390/pharmaceutics12070688] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 07/15/2020] [Accepted: 07/17/2020] [Indexed: 12/11/2022] Open
Abstract
Surface active agents (SAAs) are molecules with the capacity to adsorb to solid surfaces and/or fluid interfaces, a property that allows them to act as multifunctional ingredients (e.g., wetting and dispersion agents, emulsifiers, foaming and anti-foaming agents, lubricants, etc.) in a widerange of the consumer products of various industrial sectors (e.g., pharmaceuticals, cosmetics, personal care, detergents, food, etc.). Given their widespread utilization, there is a continuously growing interest to explore their role in consumer products (relevant to promoting human health) and how such information can be utilized in order to synthesize better chemical derivatives. In this review article, weaimed to provide updated information on synthetic and biological (biosurfactants) SAAs and their health-promoting properties (e.g., anti-microbial, anti-oxidant, anti-viral, anti-inflammatory, anti-cancer and anti-aging) in an attempt to better define some of the underlying mechanism(s) by which they exert such properties.
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Affiliation(s)
- Ioannis Anestopoulos
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.E.K.); (A.G.)
| | - Despoina Eugenia Kiousi
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.E.K.); (A.G.)
| | - Ariel Klavaris
- Department of Biological Sciences, University of Cyprus, 2109 Nicosia, Cyprus;
| | - Alex Galanis
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.E.K.); (A.G.)
| | - Karina Salek
- Institute of Mechanical, Process & Energy Engineering, Heriot Watt University, Edinburgh EH14 4AS, UK; (K.S.); (S.R.E.)
| | - Stephen R. Euston
- Institute of Mechanical, Process & Energy Engineering, Heriot Watt University, Edinburgh EH14 4AS, UK; (K.S.); (S.R.E.)
| | - Aglaia Pappa
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (I.A.); (D.E.K.); (A.G.)
| | - Mihalis I. Panayiotidis
- Department of Applied Sciences, Northumbria University, Newcastle Upon Tyne NE1 8ST, UK
- Department of Electron Microscopy & Molecular Pathology, The Cyprus Institute of Neurology & Genetics, 2371 Nicosia, Cyprus
- The Cyprus School of Molecular Medicine, P.O. Box 23462, 1683 Nicosia, Cyprus
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Sawatsky ML, Lalumière ML. Effect of a Condom Cover on Vaginal Photoplethysmographic Responses. J Sex Med 2020; 17:702-715. [PMID: 32035833 DOI: 10.1016/j.jsxm.2019.12.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 10/28/2019] [Accepted: 12/13/2019] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The vaginal photoplethysmograph (VPP) is a reusable intravaginal device often employed in sexual psychophysiology studies to assess changes in vaginal blood flow, an indicator of sexual arousal. AIM To test whether placing a disposable cover on the VPP probe impacts the acquired data. A condom cover would reduce risk of disease transmission and likely increase participant comfort but may negatively impact the VPP signal. METHOD The genital responses of 25 cisgender women (mean age = 21.3 years, standard deviation = 2.6) were assessed with VPP in a within-subjects design with 2 conditions-with and without a polyisoprene condom cover. Sexual responses were elicited by audiovisual film clips that varied in erotic intensity: nonsexual (nonsexual male-female interaction), low-intensity sexual (nude exercise), and high-intensity sexual (male-female intercourse). Women continuously rated their sexual arousal during stimulus presentations. MAIN OUTCOME MEASURE Change in vaginal pulse amplitude and also self-reported sexual arousal. RESULTS The magnitude of sexual response to each stimulus category and the overall pattern of results were found to be highly similar in the cover-off and cover-on conditions. The high-intensity sexual stimulus category elicited a greater sexual response than all other categories. The low-intensity sexual category elicited a (small) genital response in only the cover-on condition, although we suspect this is a spurious finding. There was no difference in the average number of edited movement artifacts across conditions. CLINICAL IMPLICATIONS Potential benefits of encasing the VPP probe with a protective cover include enhanced participant safety and comfort, especially if assessing genital responses of high-risk or immunocompromised samples. The use of a cover complies with current guidelines for reprocessing semi-critical medical devices (eg, vaginal ultrasound probes) in many regions. STRENGTHS & LIMITATIONS Although the idea of a VPP probe cover had been discussed among sexual psychophysiology researchers, this is the first study to empirically test whether a cover could jeopardize VPP data. Potential limitations include the use of a 10-Hz VPP sampling rate and a cover that was not tailored to the size of the VPP probe. CONCLUSION Placing a protective cover on the VPP probe did not appear to meaningfully impact sexual arousal or the VPP data. Based on these results and the potential advantages of a protective cover, researchers may wish to integrate the use a condom cover in their experiment protocols and clinical applications. Sawatsky ML, Lalumière ML. Effect of a Condom Cover on Vaginal Photoplethysmographic Responses. J Sex Med 2020; 17:702-715.
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Affiliation(s)
- Megan L Sawatsky
- University of Ottawa, Faculty of Social Sciences, Department of Psychology, Ottawa, ON, Canada
| | - Martin L Lalumière
- University of Ottawa, Faculty of Social Sciences, Department of Psychology, Ottawa, ON, Canada.
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13
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Efficient inactivation of pseudotyped HIV-based lentiviral vectors and infectious HIV. J Virol Methods 2019; 276:113768. [PMID: 31704112 DOI: 10.1016/j.jviromet.2019.113768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/01/2019] [Accepted: 11/01/2019] [Indexed: 11/24/2022]
Abstract
Lentiviral vectors and lentiviruses are important tools for basic and applied biomedical research. Yet, biosafety regulations from legal authorities have to be fulfilled when transferring BSL-2 to -3 vectors/viruses to facilities with lower biosafety level. Here, we (re-)evaluated different chemical and thermal approaches to inactivate vesicular stomatitis virus G-protein (VSV-G) pseudotyped lentiviral vectors and either wildtype or VSV-G pseudotyped human immunodeficiency viruses (HIV). Aldehydes, detergents and alcohols were as effective as thermal inactivation procedures to efficiently inactivate purified lentiviral vectors and replication-competent HIV. In addition, no residual infectivity was detected when inactivating HIV-infected TZM-bl reporter cells with selected detergents and aldehydes. Thus, our established inactivation protocols can be used by other laboratories working with lentiviral vectors or infectious lentiviruses and provide a template for viruses with similar physicochemical properties.
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14
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Assessment of antiherpetic activity of nonsulfated and sulfated polysaccharides from Azadirachta indica. Int J Biol Macromol 2019; 137:54-61. [DOI: 10.1016/j.ijbiomac.2019.06.129] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 06/17/2019] [Accepted: 06/17/2019] [Indexed: 12/14/2022]
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Zhou M, Doyle MP, Chen D. Combination of levulinic acid and sodium dodecyl sulfate on inactivation of foodborne microorganisms: A review. Crit Rev Food Sci Nutr 2019; 60:2526-2531. [PMID: 31397170 DOI: 10.1080/10408398.2019.1650249] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The combination of levulinic acid and sodium dodecyl sulfate (SDS) in recent years has shown considerable promise as an antimicrobial intervention. Both ingredients have been designated by the U.S. Food and Drug Administration (FDA) as Generally Recognized as Safe (GRAS) for being used as a flavoring agent and multipurpose food additive, respectively. The use of levulinic acid and SDS alone has limited antimicrobial efficacy on tested microorganisms, and synergism between levulinic acid and SDS has been observed. The postulated mechanism of action of the synergistic effect is presented. The antimicrobial efficacy of levulinic acid plus SDS remains high even when organic materials are present. The other features, including penetration, foamability, and being readily soluble, extend its potential applications to disinfection of difficult-to-access areas and control of foodborne pathogens both in a planktonic state and in a biofilm. These features indicate that the levulinic acid plus SDS combination may have the potential to be applied within the food processing environment on a large scale.
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Affiliation(s)
- Manli Zhou
- College of Food Science, Southwest University, Chongqing, China.,National Demonstration Center for Experimental Food Science and Technology Education, Southwest University, Chongqing, China
| | - Michael P Doyle
- Center for Food Safety, Department of Food Science and Technology, University of Georgia, Griffin, GA, USA
| | - Dong Chen
- College of Food Science, Southwest University, Chongqing, China.,National Demonstration Center for Experimental Food Science and Technology Education, Southwest University, Chongqing, China
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Fister S, Mester P, Witte AK, Sommer J, Schoder D, Rossmanith P. Part of the problem or the solution? Indiscriminate use of bacteriophages in the food industry can reduce their potential and impair growth-based detection methods. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.02.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Alli BY, Erinoso OA, Olawuyi AB. Effect of sodium lauryl sulfate on recurrent aphthous stomatitis: A systematic review. J Oral Pathol Med 2019; 48:358-364. [DOI: 10.1111/jop.12845] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 02/28/2019] [Indexed: 12/29/2022]
Affiliation(s)
- Babatunde Y. Alli
- Faculty of Dentistry, Division of Oral Health and Society McGill University Montreal Quebec Canada
| | | | - Adetokunbo B. Olawuyi
- Department of Oral and Maxillofacial Pathology/Biology Lagos University Teaching Hospital Lagos Nigeria
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Effective chemical virus inactivation of patient serum compatible with accurate serodiagnosis of infections. Clin Microbiol Infect 2018; 25:907.e7-907.e12. [PMID: 30391583 PMCID: PMC7128130 DOI: 10.1016/j.cmi.2018.10.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 09/13/2018] [Accepted: 10/23/2018] [Indexed: 12/14/2022]
Abstract
Objectives Highly pathogenic viruses such as EBOV are a threat to routine laboratory workers. Inactivation procedures with Triton X-100 0.1% and/or heat are currently recommended, but have unknown effects on the accuracy of serological testing. Furthermore, virus inactivation by Triton X-100 0.1% was shown to be ineffective in serum. This study aimed to demonstrate virus inactivation in serum by Triton X-100 1% and maintained accuracy of serological testing. Methods A panel of 19 serological tests was run on patient serum samples after treatment with Triton X-100 1%, 0.1%, and 0.1% + heat inactivation at 60°C for 1 h. Mean differences between measurements (bias) were calculated applying the Bland–Altman method. To determine effectiveness of virus inactivation, herpes simplex virus 1 (HSV-1) was spiked into medium containing 90% or 1% serum, and treated with Triton X-100 0.1% or 1%. Infectious titres were then determined on Vero cells. Results Serological measurements showed good agreement between controls and samples treated with Triton X-100 0.1% and 1%, with an estimated bias of 0.6 ± 9.2% (n = 258) and –0.1 ± 18.6% (n = 174), respectively. Discordant qualitative results were rare. Conversely, heat inactivation alone and combined with Triton X-100 0.1% triggered a bias of 17.5 ± 66.4% (n = 200) and 37.9 ± 79.8% (n = 160), respectively. Triton X-100 1% completely inactivated HSV-1 in 1% and 90% serum while Triton X-100 0.1% failed to do so in 90% serum. Conclusions Unlike heat inactivation, Triton X-100 1% enabled accurate serological testing and completely inactivated HSV-1 in serum. This simple method could allow safe routine serological diagnostics in high-risk patients.
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Patterson EI, Warmbrod KL, Bouyer DH, Forrester NL. Evaluation of the inactivation of Venezuelan equine encephalitis virus by several common methods. J Virol Methods 2018; 254:31-34. [PMID: 29407211 DOI: 10.1016/j.jviromet.2018.01.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 12/11/2022]
Abstract
Working with virological samples requires validated inactivation protocols for safe handling and disposal. Although many techniques exist to inactivate samples containing viruses, not all procedures have been properly validated or are compatible with subsequent assays. To aid in the development of inactivation protocols for Alphaviruses, and specifically Venezuelan equine encephalitis virus (VEEV), a variety of methods were evaluated for their ability to completely inactivate a high titer sample of the vaccine strain VEEV TC-83. The methods evaluated include reagents used in RNA extraction, fixation, treatment with a detergent, and heat inactivation. Most methods were successful at inactivating the sample; however, treatment with only Buffer AVL, SDS, and heat inactivation at 58 °C for one hour were not capable of complete inactivation of the virus in the sample. These results provide a substantial framework for identifying techniques that are safe for complete inactivation of Alphaviruses and to advise protocol implementation.
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Affiliation(s)
- Edward I Patterson
- Institute for Human Infections and Immunity, Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA.
| | - Kelsey L Warmbrod
- Institute for Human Infections and Immunity, Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Donald H Bouyer
- Institute for Human Infections and Immunity, Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Naomi L Forrester
- Institute for Human Infections and Immunity, Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555, USA
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20
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Michelini FM, Alché LE, Bueno CA. Virucidal, antiviral and immunomodulatory activities of β-escin and Aesculus hippocastanum extract. J Pharm Pharmacol 2018; 70:1561-1571. [PMID: 30168142 DOI: 10.1111/jphp.13002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 08/04/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVES β-Escin, one of the constituents of Aesculus hippocastanum L. (Hippocastanaceae) seed extract (AH), inhibits NF-κB activation, which plays an important role in HSV-1 replication. The aim was to examine the antiherpetic activity of β-escin and AH, as well as their effect on the activation of NF-κB and AP-1 and cytokine secretion in epithelial cells and macrophages. METHODS Cell viability was evaluated using MTT assay, and antiviral and virucidal activity was determined by plaque assay. The effect on NF-κB and AP-1 signalling pathways activation was determined by a luciferase reporter assay, and cytokine production was measured by ELISA. KEY FINDINGS β-Escin and AH had virucidal and anti-HSV-1 activities, and the antiviral activity was discovered for other enveloped viruses (VSV and Dengue). Moreover, β-escin and AH significantly reduced NF-κB and AP-1 activation and cytokine production in macrophages stimulated with HSV-1 and TLRs ligands. However, an enhanced activation of these pathways and an increase in the levels of pro-inflammatory cytokines in β-escin and AH-treated HSV-1-infected epithelial cells were found. CONCLUSIONS This study demonstrates virucidal and broad-spectrum antiviral activities for β escin and AH. Besides, β-escin and AH modulate cytokine production depending on the stimuli (viral or non-viral) and the cell type under study.
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Affiliation(s)
- Flavia M Michelini
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Laboratorio de Virología, Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN), Buenos Aires, Argentina
| | - Laura E Alché
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Laboratorio de Virología, Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN), Buenos Aires, Argentina
| | - Carlos A Bueno
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Laboratorio de Virología, Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN), Buenos Aires, Argentina
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21
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van Kampen JJA, Tintu A, Russcher H, Fraaij PLA, Reusken CBEM, Rijken M, van Hellemond JJ, van Genderen PJJ, Koelewijn R, de Jong MD, Haddock E, Fischer RJ, Munster VJ, Koopmans MPG. Ebola Virus Inactivation by Detergents Is Annulled in Serum. J Infect Dis 2017; 216:859-866. [PMID: 28961947 DOI: 10.1093/infdis/jix401] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 08/10/2017] [Indexed: 12/21/2022] Open
Abstract
Background Treatment of blood samples from hemorrhagic fever virus (HFV)-infected patients with 0.1% detergents has been recommended for virus inactivation and subsequent safe laboratory testing. However, data on virus inactivation by this procedure are lacking. Here we show the effect of this procedure on diagnostic test results and infectious Ebola virus (EBOV) titers. Methods Serum and whole-blood samples were treated with 0.1% or 1% sodium dodecyl sulfate (SDS) or 0.1% Triton X-100 and assayed for clinical chemistry and malaria antigen detection. Infectious EBOV titers were determined in SDS-treated plasma and whole blood from EBOV-infected nonhuman primates (NHPs). Infectious titers of EBOV or herpes simplex virus type 1 (HSV-1) in detergents-treated cell culture medium containing various serum concentrations were determined. Results Laboratory test results were not affected by 0.1% detergent treatment of blood samples, in contrast with 1% SDS treatment. However, 0.1% detergent treatment did not inactivate EBOV in blood samples from infected NHPs. Experiments with cell culture medium showed that virus inactivation by detergents is annulled at physiological serum concentrations. Conclusions Treatment of blood samples with 0.1% SDS or Triton X-100 does not inactivate EBOV. Inactivation protocols for HFV should be validated with serum and whole blood.
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Affiliation(s)
| | | | | | | | | | | | - Jaap J van Hellemond
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC, Rotterdam
| | | | - Rob Koelewijn
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC, Rotterdam
| | - Menno D de Jong
- Department of Medical Microbiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Elaine Haddock
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
| | - Robert J Fischer
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
| | - Vincent J Munster
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana
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23
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Scanlan PD, Bischofberger AM, Hall AR. Modification of Escherichia coli-bacteriophage interactions by surfactants and antibiotics in vitro. FEMS Microbiol Ecol 2016; 93:fiw211. [PMID: 27737900 PMCID: PMC5091284 DOI: 10.1093/femsec/fiw211] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2016] [Indexed: 01/21/2023] Open
Abstract
Although experiments indicate that the abiotic environment plays an important role in bacterial interactions with their parasitic viruses (bacteriophages or phages), it is not yet clear how exposure to compounds present in nature alters the impact of phages on bacterial growth and evolution. To address this question, we exposed Escherichia coli K12 MG1655, in combination with three lytic phages, to various substances that natural and clinical microbial populations are likely to encounter: bile salts (present in mammalian gastrointestinal tracts), sodium dodecyl sulfate (SDS, a common surfactant in cleaning and hygiene products) and four antibiotics (present at variable concentrations in natural and clinical environments). Our results show that bile salts and SDS can reduce the detrimental effect of phages on bacterial growth. In some cases these compounds completely mitigated any negative effects of phages on bacterial growth and consequently bacteria did not evolve resistance to phages in these conditions. The proportional effects of phages were unaffected by antibiotics in most combinations, excepting three cases of phage-drug synergy. These results suggest that accounting for interactions between phages and environmental factors such as surfactants and antibiotics will improve understanding of both bacterial growth and resistance evolution to phages in vivo and in nature.
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Affiliation(s)
- Pauline D Scanlan
- APC Microbiome Institute, Bioscience Building, University College Cork, Ireland
| | | | - Alex R Hall
- Institute of Integrative Biology, ETH Zürich, 8092 Zürich, Switzerland
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Fister S, Robben C, Witte AK, Schoder D, Wagner M, Rossmanith P. Influence of Environmental Factors on Phage-Bacteria Interaction and on the Efficacy and Infectivity of Phage P100. Front Microbiol 2016; 7:1152. [PMID: 27516757 PMCID: PMC4964841 DOI: 10.3389/fmicb.2016.01152] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 07/11/2016] [Indexed: 11/13/2022] Open
Abstract
When using bacteriophages to control food-borne bacteria in food production plants and processed food, it is crucial to consider that environmental conditions influence their stability. These conditions can also affect the physiological state of bacteria and consequently host–virus interaction and the effectiveness of the phage ability to reduce bacteria numbers. In this study we investigated the stability, binding, and replication capability of phage P100 and its efficacy to control Listeria monocytogenes under conditions typically encountered in dairy plants. The influences of SDS, Lutensol AO 7, salt, smear water, and different temperatures were investigated. Results indicate that phage P100 is stable and able to bind to the host under most conditions tested. Replication was dependent upon the growth of L. monocytogenes and efficacy was higher when bacterial growth was reduced by certain environmental conditions. In long-term experiments at different temperatures phages were initially able to reduce bacteria up to seven log10 units after 2 weeks at 4°C. However, thereafter, re-growth and development of phage-resistant L. monocytogenes isolates were encountered.
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Affiliation(s)
- Susanne Fister
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Public Veterinary Health, University of Veterinary Medicine Vienna, Austria
| | - Christian Robben
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Public Veterinary Health, University of Veterinary Medicine Vienna, Austria
| | - Anna K Witte
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Public Veterinary Health, University of Veterinary Medicine Vienna, Austria
| | - Dagmar Schoder
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Public Veterinary Health, University of Veterinary MedicineVienna, Austria; Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Public Veterinary Health, University of Veterinary MedicineVienna, Austria
| | - Martin Wagner
- Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Public Veterinary Health, University of Veterinary Medicine Vienna, Austria
| | - Peter Rossmanith
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Public Veterinary Health, University of Veterinary MedicineVienna, Austria; Institute for Milk Hygiene, Milk Technology and Food Science, Department for Farm Animals and Public Veterinary Health, University of Veterinary MedicineVienna, Austria
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Yoon BK, Jackman JA, Kim MC, Cho NJ. Spectrum of Membrane Morphological Responses to Antibacterial Fatty Acids and Related Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10223-32. [PMID: 26325618 DOI: 10.1021/acs.langmuir.5b02088] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Medium-chain saturated fatty acids and related compounds (e.g., monoglycerides) represent one class of membrane-active surfactants with antimicrobial properties. Most related studies have been in vitro evaluations of bacterial growth inhibition, and there is limited knowledge about how the compounds in this class destabilize lipid bilayers, which are the purported target within the bacterial cell membrane. Herein, the interaction between three representative compounds in this class and a supported lipid bilayer platform was investigated using quartz crystal microbalance-dissipation and fluorescence microscopy in order to examine membrane destabilization. The three tested compounds were lauric acid, sodium dodecyl sulfate, and glycerol monolaurate. For each compound, we discovered striking differences in the resulting morphological changes of supported lipid bilayers. The experimental trends indicate that the compounds have membrane-disruptive behavior against supported lipid bilayers principally above the respective critical micelle concentration values. The growth inhibition properties of the compounds against standard and methicillin-resistant Staphylococcus aureus bacterial strains were also tested. Taken together, the findings in this work improve our knowledge about how saturated fatty acids and related compounds destabilize lipid bilayers, offering insight into the corresponding molecular mechanisms that lead to membrane morphological responses.
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Affiliation(s)
| | | | | | - Nam-Joon Cho
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive 637459, Singapore
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Suazo PA, Tognarelli EI, Kalergis AM, González PA. Herpes simplex virus 2 infection: molecular association with HIV and novel microbicides to prevent disease. Med Microbiol Immunol 2015; 204:161-76. [PMID: 25209142 PMCID: PMC7102243 DOI: 10.1007/s00430-014-0358-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 09/01/2014] [Indexed: 12/17/2022]
Abstract
Infection with herpes simplex viruses is one of the most ancient diseases described to affect humans. Infection with these viruses produces vexing effects to the host, which frequently recur. Infection with herpes simplex viruses is lifelong, and currently there is no vaccine or drug to prevent or cure infection. Prevalence of herpes simplex virus 2 (HSV-2) infection varies significantly depending on the geographical region and nears 20% worldwide. Importantly, HSV-2 is the first cause of genital ulcers in the planet. HSV-2 affects approximately 500 million people around the globe and significantly increases the likelihood of acquiring the human immunodeficiency virus (HIV), as well as its shedding. Thus, controlling HSV-2 infection and spread is of public health concern. Here, we review the diseases produced by herpes simplex viruses, the factors that modulate HSV-2 infection, the relationship between HSV-2 and HIV and novel therapeutic and prophylactic microbicides/antivirals under development to prevent infection and pathological outcomes produced by this virus. We also review mutations associated with HSV-2 resistance to common antivirals.
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Affiliation(s)
- Paula A. Suazo
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Avenida Portugal 49, 8331010 Santiago, Chile
| | - Eduardo I. Tognarelli
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Avenida Portugal 49, 8331010 Santiago, Chile
| | - Alexis M. Kalergis
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Avenida Portugal 49, 8331010 Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Avenida Portugal 49, 8331010 Santiago, Chile
- Departamento de Inmunología Clínica y Reumatología, Escuela de Medicina, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
- INSERM U1064, Nantes, France
| | - Pablo A. González
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Avenida Portugal 49, 8331010 Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Avenida Portugal 49, 8331010 Santiago, Chile
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Jadulco RC, Pond CD, Van Wagoner RM, Koch M, Gideon OG, Matainaho TK, Piskaut P, Barrows LR. 4-Quinolone alkaloids from Melochia odorata. JOURNAL OF NATURAL PRODUCTS 2014; 77:183-187. [PMID: 24392742 PMCID: PMC3931125 DOI: 10.1021/np400847t] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The methanol extract of Melochia odorata yielded three 4-quinolone alkaloids including waltherione A (1) and two new alkaloids, waltherione C (2) and waltherione D (3). Waltheriones A and C showed significant activities in an in vitro anti-HIV cytoprotection assay at concentrations of 56.2 and 0.84 μM and inhibition of HIV P24 formation of more than 50% at 1.7 and 0.95 μM, respectively. The structures of the alkaloids were established by spectroscopic data interpretation.
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Affiliation(s)
- Raquel C. Jadulco
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah, USA
| | - Christopher D. Pond
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah, USA
| | - Ryan M. Van Wagoner
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, USA
| | - Michael Koch
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah, USA
| | - Osia G. Gideon
- School of Natural and Physical Sciences, University of Papua New Guinea, Boroko, NCD, Papua New Guinea
| | - Teatulohi K. Matainaho
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah, USA
- School of Medicine and Health Sciences, University of Papua New Guinea, Boroko, NCD, Papua New Guinea
| | - Pius Piskaut
- School of Natural and Physical Sciences, University of Papua New Guinea, Boroko, NCD, Papua New Guinea
| | - Louis R. Barrows
- Department of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah, USA
- School of Medicine and Health Sciences, University of Papua New Guinea, Boroko, NCD, Papua New Guinea
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The antimicrobial agent C31G is effective for therapy for HSV-1 ocular keratitis in the rabbit eye model. Antiviral Res 2013; 100:14-9. [PMID: 23860013 DOI: 10.1016/j.antiviral.2013.07.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 06/26/2013] [Accepted: 07/05/2013] [Indexed: 11/20/2022]
Abstract
The amphoteric C31G solution contains equimolar alkyl dimethlyglycine and alkyl dimethyl amine oxide buffered with citric acid. C31G acts as a broad spectrum antiviral and an antibacterial. No previous in vivo studies have been done to test C31G in an animal model of HSV-1 ocular keratitis. We assessed the anti-herpetic activity of C31G in the rabbit eye model using three treatment groups: (1) 1% trifluorothymidine (TFT); (2) 0.25% C31G plus 0.5% hydroxypropyl methylcellulose (HPMC); and (3) vehicle, 0.5% HPMC. Scarified rabbit corneas were inoculated with the HSV-1 strain McKrae. On post inoculation (PI) day 3, rabbits were placed in three balanced groups based on slit-lamp examination (SLE) scores. Treatment began on PI day 3, five times a day for five consecutive days. In addition to the daily, masked SLE scoring, the eyes were assessed daily for stromal opacity, scleral inflammation, neovascularization, eyelid inflammation, inflammatory discharge, and epiphora. C31G and TFT were very effective in reducing the lesions and pathogenesis associated with HSV-1 ocular keratitis. The vehicle control scores were significantly higher and did not effectively treat HSV-1 keratitis. C31G has the potential to be used to treat herpetic keratitis as well as other herpetic topical lesions in humans.
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Sanitizer efficacy against murine norovirus, a surrogate for human norovirus, on stainless steel surfaces when using three application methods. Appl Environ Microbiol 2012; 79:1368-77. [PMID: 23263949 DOI: 10.1128/aem.02843-12] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Human noroviruses are major etiologic agents of epidemic gastroenteritis. Outbreaks are often accompanied by contamination of environmental surfaces, but since these viruses cannot be routinely propagated in laboratory cultures, their response to surface disinfectants is predicted by using surrogates, such as murine norovirus 1 (MNV-1). This study compared the virucidal efficacies of various liquid treatments (three sanitizer liquids, 5% levulinic acid plus 2% SDS [LEV/SDS], 200 ppm chlorine, and an isopropanol-based quaternary ammonium compound [Alpet D2], and two control liquids, sterile tap water and sterile tap water plus 2% SDS) when delivered to MNV-1-inoculated stainless steel surfaces by conventional hydraulic or air-assisted, induction-charged (AAIC) electrostatic spraying or by wiping with impregnated towelettes. For the spray treatments, LEV/SDS proved effective when applied with hydraulic and AAIC electrostatic spraying, providing virus reductions of 2.71 and 1.66 log PFU/ml, respectively. Alpet D2 provided a 2.23-log PFU/ml reduction with hydraulic spraying, outperforming chlorine (1.16-log PFU/ml reduction). Chlorine and LEV/SDS were equally effective as wipes, reducing the viral load by 7.05 log PFU/ml. Controls reduced the viral load by <1 log with spraying applications and by >3 log PFU/ml with wiping. Results indicated that both sanitizer type and application methods should be carefully considered when choosing a surface disinfectant to best prevent and control environmental contamination by noroviruses.
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Gerrard SE, Baniecki ML, Sokal DC, Morris MK, Urdaneta-Hartmann S, Krebs FC, Wigdahl B, Abrams BF, Hanson CV, Slater NK, Edwards AD. A nipple shield delivery system for oral drug delivery to breastfeeding infants: Microbicide delivery to inactivate HIV. Int J Pharm 2012; 434:224-34. [DOI: 10.1016/j.ijpharm.2012.05.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 05/15/2012] [Accepted: 05/16/2012] [Indexed: 11/25/2022]
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Predmore A, Li J. Enhanced removal of a human norovirus surrogate from fresh vegetables and fruits by a combination of surfactants and sanitizers. Appl Environ Microbiol 2011; 77:4829-38. [PMID: 21622782 PMCID: PMC3147408 DOI: 10.1128/aem.00174-11] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 05/18/2011] [Indexed: 12/30/2022] Open
Abstract
Fruits and vegetables are major vehicles for transmission of food-borne enteric viruses since they are easily contaminated at pre- and postharvest stages and they undergo little or no processing. However, commonly used sanitizers are relatively ineffective for removing human norovirus surrogates from fresh produce. In this study, we systematically evaluated the effectiveness of surfactants on removal of a human norovirus surrogate, murine norovirus 1 (MNV-1), from fresh produce. We showed that a panel of surfactants, including sodium dodecyl sulfate (SDS), Nonidet P-40 (NP-40), Triton X-100, and polysorbates, significantly enhanced the removal of viruses from fresh fruits and vegetables. While tap water alone and chlorine solution (200 ppm) gave only <1.2-log reductions in virus titer in all fresh produce, a solution containing 50 ppm of surfactant was able to achieve a 3-log reduction in virus titer in strawberries and an approximately 2-log reduction in virus titer in lettuce, cabbage, and raspberries. Moreover, a reduction of approximately 3 logs was observed in all the tested fresh produce after sanitization with a solution containing a combination of 50 ppm of each surfactant and 200 ppm of chlorine. Taken together, our results demonstrate that the combination of a surfactant with a commonly used sanitizer enhanced the efficiency in removing viruses from fresh produce by approximately 100 times. Since SDS is an FDA-approved food additive and polysorbates are recognized by the FDA as GRAS (generally recognized as safe) products, implementation of this novel sanitization strategy would be a feasible approach for efficient reduction of the virus load in fresh produce.
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Affiliation(s)
- Ashley Predmore
- Department of Food Science and Technology, College of Food, Agricultural and Environmental Sciences
| | - Jianrong Li
- Department of Food Science and Technology, College of Food, Agricultural and Environmental Sciences
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University, Columbus, Ohio 43210
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Lewis CS, Katz J, Baker MI, Supronowicz PR, Gill E, Cobb RR. Local antibiotic delivery with bovine cancellous chips. J Biomater Appl 2010; 26:491-506. [PMID: 20819915 DOI: 10.1177/0885328210375729] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Infected bone defects and osteomyelitis are encountered frequently in trauma cases. Currently, the standard of care for osteomyelitis cases is prolonged systemic antibiotic therapy and implantation of antibiotic carrier beads. However, this method requires a secondary surgery to remove the beads after the infection has cleared. In the present study a common bone void filler was investigated for its ability to be infused with an antibiotic. This study demonstrates that the xenograft material tested can be loaded with gentamicin and release clinically relevant levels of the drug for at least 14 days in vitro allowing for the inhibition of bacterial growth on the graft. This study also demonstrates that the levels of gentamicin released did not have an adverse effect on primary osteoblast cell proliferation or ability to generate alkaline phosphatase. This bone void filler may represent a viable alternative to current methods of local antibiotic delivery in orthopedic applications.
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Affiliation(s)
- Christine S Lewis
- Biotechnology Research Group, RTI Biologics, Inc., 11621 Research Circle, Alachua, FL, USA.
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Phosphorothioate 2' deoxyribose oligomers as microbicides that inhibit human immunodeficiency virus type 1 (HIV-1) infection and block Toll-like receptor 7 (TLR7) and TLR9 triggering by HIV-1. Antimicrob Agents Chemother 2010; 54:4064-73. [PMID: 20625151 DOI: 10.1128/aac.00367-10] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Topical microbicides may prove to be an important strategy for preventing human immunodeficiency virus type 1 (HIV-1) transmission. We examined the safety and efficacy of sequence-nonspecific phosphorothioate 2' deoxyribose oligomers as potential novel microbicides. A short, 13-mer poly(T) phosphorothioate oligodeoxynucleotide (OPB-T) significantly inhibited infection of primary peripheral blood mononuclear cells (PBMC) by high-titer HIV-1(Ba-L) and simian immunodeficiency virus mac251 (SIV(mac251)). Continuous exposure of human vaginal and foreskin tissue explants to OPB-T showed no toxicity. An abasic 14-mer phosphorothioate 2' deoxyribose backbone (PDB) demonstrated enhanced anti-HIV-1 activity relative to OPB-T and other homo-oligodeoxynucleotide analogs. When PDB was used to pretreat HIV-1, PDB was effective against R5 and X4 isolates at a half-maximal inhibitory concentration (IC(50)) of <1 μM in both PBMC and P4-R5 MAGI cell infections. PDB also reduced HIV-1 infectivity following the binding of virus to target cells. This novel topical microbicide candidate exhibited an excellent in vitro safety profile in human PBMC and endocervical epithelial cells. PDB also retained activity in hydroxyethylcellulose gel at pH 4.4 and after transition to a neutral pH and was stable in this formulation for 30 days at room temperature. Furthermore, the compound displayed potent antiviral activity following incubation with a Lactobacillus strain derived from normal vaginal flora. Most importantly, PDB can inhibit HIV-1-induced alpha interferon production. Phosphorothioate 2' deoxyribose oligomers may therefore be promising microbicide candidates that inhibit HIV-1 infection and also dampen the inflammation which is critical for the initial spread of the virus.
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Prause N, Heiman J. Reduced Labial Temperature in Response to Sexual Films with Distractors among Women with Lower Sexual Desire. J Sex Med 2010; 7:951-63. [DOI: 10.1111/j.1743-6109.2009.01525.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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A randomized, double-blind, placebo-controlled Phase II extended safety study of two Invisible Condom® formulations in Cameroonian women. Contraception 2010; 81:79-85. [DOI: 10.1016/j.contraception.2009.07.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2009] [Revised: 06/30/2009] [Accepted: 07/07/2009] [Indexed: 11/22/2022]
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36
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Mbopi-Keou FX, Trottier S, Omar RF, Nkele NN, Fokoua S, Mbu ER, Giguere JF, Domingo MC, Piret J, Tsague L, Zekeng L, Mwatha A, Mâsse B, Bergeron MG. A randomized, double-blind, placebo-controlled safety and acceptability study of two Invisible Condom® formulations in women from Cameroon. Contraception 2009; 80:484-92. [DOI: 10.1016/j.contraception.2009.03.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 03/05/2009] [Accepted: 03/31/2009] [Indexed: 11/16/2022]
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37
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Prause N, Heiman J. Assessing female sexual arousal with the labial thermistor: Response specificity and construct validity. Int J Psychophysiol 2009; 72:115-22. [DOI: 10.1016/j.ijpsycho.2008.11.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2008] [Revised: 11/06/2008] [Accepted: 11/07/2008] [Indexed: 11/29/2022]
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Katz J, Mukherjee N, Cobb RR, Bursac P, York-Ely A. Incorporation and immunogenicity of cleaned bovine bone in a sheep model. J Biomater Appl 2008; 24:159-74. [PMID: 18987022 DOI: 10.1177/0885328208095174] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study was conducted to determine if a novel cleaning process could extract antigenic material from bovine bone thereby improving incorporation. Cleaned bovine xenograft, untreated bovine xenograft and sheep allograft were implanted into the tibia of mature sheep for 12 and 24 weeks. Inflammation, bone integration and immunological reactions were evaluated via standardized assays. Cleaned bovine bone dowels induced significantly lower inflammatory responses (p < 50.05) when compared to traditionally processed xenograft. Bone integration, measured by in situ biomechanics, was not different between cleaned bovine bone and allograft controls (p = 0.96). A transient antibody response was observed for non-treated xenografts although this response abated by 3 months.
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Affiliation(s)
- Jordan Katz
- Biotechnology Development Group, RTI Biologics, Alachua, FL, USA
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39
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Supronowicz P, Zhukauskas R, York-Ely A, Wicomb W, Thula T, Fleming L, Cobb RR. Immunologic analyses of bovine bone treated with a novel tissue sterilization process. Xenotransplantation 2008; 15:398-406. [DOI: 10.1111/j.1399-3089.2008.00502.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Apel-Paz M, Doncel GF, Vanderlick TK. Surfactants as Microbicidal Contraceptives: A Calorimetric Study of Partitioning and Translocation in Model Membrane Systems. Ind Eng Chem Res 2008. [DOI: 10.1021/ie071105e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Omar RF, Trottier S, Brousseau G, Lamarre A, Alexandre Gagnon, Bergeron MG. Distribution of a vaginal gel (Invisible Condom) before, during and after simulated sexual intercourse and its persistence when delivered by two different vaginal applicators: a magnetic resonance imaging study. Contraception 2008; 77:447-55. [PMID: 18477496 DOI: 10.1016/j.contraception.2008.01.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2007] [Revised: 01/04/2008] [Accepted: 01/09/2008] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate the vaginal distribution of a microbicidal gel (Invisible Condom) before, during and after simulated intercourse using an artificial phallus. The gel was delivered using either a new proprietary vaginal applicator (PVA), which has multiple lateral and apical holes, or a commercial applicator (CA), which has a single apical hole. The persistence of the gel was evaluated up to 24 h after its administration. STUDY DESIGN Nine women (five women using the PVA and four women using the CA) applied the vaginal gel once, and pelvic images were taken immediately after application. An artificial phallus was inserted and the women had 30 vaginal thrusts, then another set of images was taken while the phallus was still inside the vagina. On exit of the phallus, one more set of images was taken. Images were subsequently taken at 30 min, 2 h, 6 h and 24 h after gel application. RESULTS Immediately after gel application, the PVA distributed the gel throughout the vaginal/cervical mucosae, while the CA delivered the gel only to the cervical area. During simulated intercourse, the phallus further pushed the gel delivered with the CA into the fornix, whereas it spread the gel delivered with the PVA more evenly throughout the mucosal surface. After simulated intercourse, both applicators gave similar gel distributions between 30 min and 6 h after application. However, at 24 h, using the PVA, only 5% of the gel persisted in the vagina, compared to 40% of the gel using the CA. DISCUSSION AND CONCLUSION Using the new PVA, the Invisible Condom covered the vaginal/cervical mucosae before and during simulated intercourse, offering immediate protection, whereas only the cervical mucosa was covered using the CA. Forty percent of the gel persisted mostly in the upper vaginal/cervical area at 24 h following its administration with the CA, while only 5% of the gel was left using the PVA. The new applicator, with its unique design, ensures an even and immediate coating lasting throughout the first 6 h and could prevent potential microbicide vaginal toxicity at 24 h.
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Affiliation(s)
- Rabeea F Omar
- Centre de Recherche en Infectiologie de l'Université Laval, Centre Hospitalier Universitaire de Québec (Centre Hospitalier de l'Université Laval), Québec, QC, Canada G1V 4G2
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42
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Ndesendo VMK, Pillay V, Choonara YE, Buchmann E, Bayever DN, Meyer LCR. A review of current intravaginal drug delivery approaches employed for the prophylaxis of HIV/AIDS and prevention of sexually transmitted infections. AAPS PharmSciTech 2008; 9:505-20. [PMID: 18431651 PMCID: PMC2976928 DOI: 10.1208/s12249-008-9073-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Accepted: 02/04/2008] [Indexed: 12/26/2022] Open
Abstract
The objective of this review is to describe the current status of several intravaginal anti-HIV microbicidal delivery systems these delivery systems and microbicidal compounds in the context of their stage within clinical trials and their potential cervicovaginal defence successes. The global Human Immuno-Deficiency Virus (HIV) pandemic continues to spread at a rate of more than 15,000 new infections daily and sexually transmitted infections (STIs) can predispose people to acquiring HIV infection. Male-to-female transmission is eight times more likely to occur than female-to-male transmission due to the anatomical structure of the vagina as well as socio-economic factors and the disempowerment of women that renders them unable to refuse unsafe sexual practices in some communities. The increased incidence of HIV in women has identified the urgent need for efficacious and safe intravaginal delivery of anti-HIV agents that can be used and controlled by women. To meet this challenge, several intravaginal anti-HIV microbicidal delivery systems are in the process of been developed. The outcomes of three main categories are discussed in this review: namely, dual-function polymeric systems, non-polymeric systems and nanotechnology-based systems. These delivery systems include formulations that modify the genital environment (e.g. polyacrylic acid gels and lactobacillus gels), surfactants (e.g. sodium lauryl sulfate), polyanionic therapeutic polymers (e.g. carageenan and carbomer/lactic acid gels), proteins (e.g. cyanovirin-N, monoclonal antibodies and thromspondin-1 peptides), protease inhibitors and other molecules (e.g. dendrimer based-gels and the molecular condom). Intravaginal microbicide delivery systems are providing a new option for preventing the transmission of STIs and HIV.
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Affiliation(s)
- Valence M. K. Ndesendo
- />Department of Pharmacy and Pharmacology, University of the Witwatersrand, 7 York Road, Parktown 2193 Johannesburg, South Africa
| | - Viness Pillay
- />Department of Pharmacy and Pharmacology, University of the Witwatersrand, 7 York Road, Parktown 2193 Johannesburg, South Africa
| | - Yahya E. Choonara
- />Department of Pharmacy and Pharmacology, University of the Witwatersrand, 7 York Road, Parktown 2193 Johannesburg, South Africa
| | - Eckhart Buchmann
- />Department of Gynecology and Obstetrics, Chris Hani Baragwanath Hospital, Bertsham, Johannesburg, 2013 South Africa
| | - David N. Bayever
- />Department of Pharmacy and Pharmacology, University of the Witwatersrand, 7 York Road, Parktown 2193 Johannesburg, South Africa
| | - Leith C. R. Meyer
- />Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg, 2193 South Africa
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Pavlovic J, Floros J, Phelps DS, Wigdahl B, Welsh P, Weisz J, Shearer DA, Pree ALD, Myers R, Howett MK. Differentiation of xenografted human fetal lung parenchyma. Early Hum Dev 2008; 84:181-93. [PMID: 17555893 PMCID: PMC2753467 DOI: 10.1016/j.earlhumdev.2007.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Revised: 03/11/2007] [Accepted: 04/08/2007] [Indexed: 11/19/2022]
Abstract
The goal of this study was to characterize xenografted human fetal lung tissue with respect to developmental stage-specific cytodifferentiation. Human fetal lung tissue (pseudoglandular stage) was grafted either beneath the renal capsule or the skin of athymic mice (NCr-nu). Tissues were analyzed from 3 to 42 days post-engraftment for morphological alterations by light and electron microscopy (EM), and for surfactant protein mRNA and protein by reverse transcription-polymerase chain reaction (RT-PCR) and immunocytochemistry (ICC), respectively. The changes observed resemble those seen in human lung development in utero in many respects, including the differentiation of epithelium to the saccular stage. Each stage occurred over approximately one week in the graft in contrast to the eight weeks of normal in utero development. At all time points examined, all four surfactant proteins (SP-A, SP-B, SP-C, and SP-D) were detected in the epithelium by ICC. Lamellar bodies were first identified by EM in 14 day xenografts. By day 21, a significant increase in lamellar body expression was observed. Cellular proliferation, as marked by PCNA ICC and elastic fiber deposition resembled those of canalicular and saccular in utero development. This model in which xenografted lung tissue in different stages of development is available may facilitate the study of human fetal lung development and the impact of various pharmacological agents on this process.
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Affiliation(s)
- Jelena Pavlovic
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Joanna Floros
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
- Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
- Department of Obstetrics and Gynecology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
- Correspondence /Request for reprints: Joanna Floros, Ph.D., Evan Pugh Professor of Cellular and Molecular Physiology, Pediatrics, and Obstetrics and Gynecology, e-mail: , or Mary K. Howett, Ph.D., The Pennsylvania State University College of Medicine, 500 University Drive; Hershey, PA 17033, USA
| | - David S. Phelps
- Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Brian Wigdahl
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Patricia Welsh
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Judith Weisz
- Department of Obstetrics and Gynecology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Debra A. Shearer
- Department of Obstetrics and Gynecology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Alphonse Leure du Pree
- Department of Neuroscience and Anatomy, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Roland Myers
- Department of Neuroscience and Anatomy, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Mary K. Howett
- Department of Obstetrics and Gynecology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
- Correspondence /Request for reprints: Joanna Floros, Ph.D., Evan Pugh Professor of Cellular and Molecular Physiology, Pediatrics, and Obstetrics and Gynecology, e-mail: , or Mary K. Howett, Ph.D., The Pennsylvania State University College of Medicine, 500 University Drive; Hershey, PA 17033, USA
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Piret J, Laforest G, Bussières M, Bergeron MG. Subchronic (26- and 52-week) toxicity and irritation studies of a novel microbicidal gel formulation containing sodium lauryl sulfate in animal models. J Appl Toxicol 2008; 28:164-74. [PMID: 17549701 DOI: 10.1002/jat.1262] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The safety of an ethylene oxide/propylene oxide gel formulation containing sodium lauryl sulfate (2%, w/w), that could be a potent candidate as a topical microbicide, has been evaluated. More specifically, the subchronic (26- and 52-week) toxicity of the formulation when applied intravaginally as well as its irritating potential for the rectal, penile, eye, skin and buccal mucosa have been examined in animal models. The results showed that the vaginal administration of the gel formulation containing sodium lauryl sulfate once and twice daily (with doses 12 +/- 2 h apart) for 26 weeks to rats and for 52 weeks to rabbits induced slight to moderate histopathological alterations. When the formulation was applied intrarectally to male and female rabbits once and twice daily (with doses 12 +/- 2 h apart) for 14 days, no macroscopic or microscopic changes were reported. For both vaginal and rectal dosing, no effect was seen on the haematology, coagulation and serum chemistry parameters as well as on the body weight of animals and the relative organ weights. Other sporadic macroscopic and histopathological findings were incidental in origin and of no toxicological significance. The gel formulation containing sodium lauryl sulfate was considered as mildly irritating for the penile mucosa of rabbits, non-irritating for the eye of rabbits, mildly irritating for the skin in a rabbit model and non-irritating for the hamster cheek pouch. It is suggested that the gel formulation containing sodium lauryl sulfate is safe for most tissues that could be exposed to the product under normal use.
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Affiliation(s)
- Jocelyne Piret
- Centre de recherche en infectiologie, Laval University, Quebec, Quebec, Canada, G1V 4G2
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45
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Trottier S, Omar RF, Désormeaux A, Drouin J, Gagnon MT, Vezina F, Guilbert E, Mâsse B, Bergeron MG. Safety, tolerance and acceptability of the Invisible Condom® and its vaginal applicator in healthy women and their male sexual partners. Contraception 2007; 76:117-25. [PMID: 17656181 DOI: 10.1016/j.contraception.2007.04.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2007] [Revised: 04/02/2007] [Accepted: 04/26/2007] [Indexed: 11/21/2022]
Abstract
OBJECTIVES The study was conducted to evaluate the safety and acceptability of the Invisible Condom when applied once or twice daily for 14 days in healthy women and their male sexual partners. STUDY DESIGN Forty-one women and 23 men divided into three cohorts were enrolled. Cohort 1:14 sexually abstinent women applying gel twice daily for 14 days; Cohort 2:14 sexually active women with tubal ligation applying gel once daily for 14 days and their 14 sexual partners who did not use gel; Cohort 3:13 women on oral contraceptive applying gel once daily for 14 days and 9 of their sexual partners. RESULTS No serious adverse events (AEs) were reported. Colposcopy showed no genital ulceration nor epithelial lesions. No major changes in vaginal flora or vaginal pH were detected. None of the women had to stop product application because of AEs. The majority of AEs were mild. Common AEs were itching, dryness, burning sensation, erythema and discharge. Satisfaction questionnaire showed that the gel and applicator were acceptable. CONCLUSION The Invisible Condom and applicator were safe, well tolerated and acceptable when applied intravaginally for 14 days. Thus, expanded safety and effectiveness evaluation is warranted.
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Affiliation(s)
- Sylvie Trottier
- Infectious Diseases Research Centre, Université Laval, Québec, QC, Canada G1V 4G2
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Keller MJ, Herold BC. Impact of microbicides and sexually transmitted infections on mucosal immunity in the female genital tract. ACTA ACUST UNITED AC 2007; 56:356-63. [PMID: 17076680 DOI: 10.1111/j.1600-0897.2006.00436.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Human immunodeficiency virus, genital herpes, and other sexually transmitted infections are a critical national and global health priority requiring the rapid development of safe and effective control methods. Topical microbicides, self-administered agents designed for vaginal use, that block transmission at the mucosal surface may provide a realistic method of intervention that could be distributed worldwide. An optimal microbicide should protect against infection but must also be safe, without adversely affecting the mucosal environment, including mediators of host defense. Thus, a critical component in microbicides development is to identify optimal assays that could serve as surrogate markers to predict safety of microbicides prior to embarking on large-scale clinical trials. This will require a greater understanding of the mediators of mucosal immunity in the female genital tract.
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Affiliation(s)
- Marla J Keller
- Division of Infectious Disease, Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
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Abstract
25 years after the first HIV/AIDS cases emerged in 1981, the disease continues to spread worldwide, with about 15 000 new infections every day. Although highly active antiretroviral therapy (HAART) has greatly reduced the rate of HIV infection, and the spread of the epidemic, this effect has largely been seen in developed countries. More than 90% of HIV-infected people live in developing countries, most of whom do not have access to this treatment. The development of efficient, widely available, and low-cost microbicides (gels and creams can be applied topically before sex) to prevent sexually transmitted HIV infections should be given high priority. We review different categories of microbicide drugs and lead compounds, their mechanism of action, current status of development, and progress in phase III trials.
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Affiliation(s)
- Jan Balzarini
- Rega Institute for Medical Research, K U Leuven, B-3000 Leuven, Belgium.
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Troup GM, Wrenn SP, Apel-Paz M, Doncel GF, Vanderlick TK. A Time-Resolved Fluorescence Diphenylhexatriene (DPH) Anisotropy Characterization of a Series of Model Lipid Constructs for the Sperm Plasma Membrane. Ind Eng Chem Res 2006. [DOI: 10.1021/ie058084d] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Buck CB, Thompson CD, Roberts JN, Müller M, Lowy DR, Schiller JT. Carrageenan is a potent inhibitor of papillomavirus infection. PLoS Pathog 2006; 2:e69. [PMID: 16839203 PMCID: PMC1500806 DOI: 10.1371/journal.ppat.0020069] [Citation(s) in RCA: 307] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Accepted: 05/25/2006] [Indexed: 12/21/2022] Open
Abstract
Certain sexually transmitted human papillomavirus (HPV) types are causally associated with the development of cervical cancer. Our recent development of high-titer HPV pseudoviruses has made it possible to perform high-throughput in vitro screens to identify HPV infection inhibitors. Comparison of a variety of compounds revealed that carrageenan, a type of sulfated polysaccharide extracted from red algae, is an extremely potent infection inhibitor for a broad range of sexually transmitted HPVs. Although carrageenan can inhibit herpes simplex viruses and some strains of HIV in vitro, genital HPVs are about a thousand-fold more susceptible, with 50% inhibitory doses in the low ng/ml range. Carrageenan acts primarily by preventing the binding of HPV virions to cells. This finding is consistent with the fact that carrageenan resembles heparan sulfate, an HPV cell-attachment factor. However, carrageenan is three orders of magnitude more potent than heparin, a form of cell-free heparan sulfate that has been regarded as a highly effective model HPV inhibitor. Carrageenan can also block HPV infection through a second, postattachment heparan sulfate–independent effect. Carrageenan is in widespread commercial use as a thickener in a variety of cosmetic and food products, ranging from sexual lubricants to infant feeding formulas. Some of these products block HPV infectivity in vitro, even when diluted a million-fold. Clinical trials are needed to determine whether carrageenan-based products are effective as topical microbicides against genital HPVs. Sexually transmitted human papillomavirus (HPV) infections are very common. Although most HPV infections don't cause noticeable symptoms, persistent infection with some genital HPV types can lead to cervical cancer or other anal/genital cancers. Another subset of HPV types can cause genital warts. Recent studies have suggested that condoms are not highly effective in preventing HPV infection. Although HPV vaccines will soon become available, they probably will not protect against all genital HPV types and will be too expensive for use in the developing world. Inexpensive HPV-inhibitory compounds (known as topical microbicides) might be useful for blocking the spread of HPV. Using a newly developed cell culture–based HPV inhibition test, we have discovered that an inexpensive gelling agent called carrageenan is an unexpectedly potent HPV infection inhibitor. Carrageenan is also under investigation as a topical microbicide targeting HIV and herpes viruses, but it is a thousand times more effective against HPV in cell culture tests. Interestingly, carrageenan is used as a thickener in some commercially available sexual lubricants and lubricated condoms. Several of these commercial lubricant products are potent HPV inhibitors in our cell culture–infection system. Clinical trials are needed to determine the effectiveness of carrageenan as a topical microbicide against HPV.
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Affiliation(s)
- Christopher B Buck
- Laboratory of Cellular Oncology, National Cancer Institute, Bethesda, Maryland, United States of America
| | - Cynthia D Thompson
- Laboratory of Cellular Oncology, National Cancer Institute, Bethesda, Maryland, United States of America
| | - Jeffrey N Roberts
- Laboratory of Cellular Oncology, National Cancer Institute, Bethesda, Maryland, United States of America
| | - Martin Müller
- Forschungsschwerpunkt für Angewandte Tumorvirologie, Deutsches Krebsforschungszentrum, Heidelberg, Germany
| | - Douglas R Lowy
- Laboratory of Cellular Oncology, National Cancer Institute, Bethesda, Maryland, United States of America
| | - John T Schiller
- Laboratory of Cellular Oncology, National Cancer Institute, Bethesda, Maryland, United States of America
- * To whom correspondence should be addressed. E-mail:
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Cone RA, Hoen T, Wong X, Abusuwwa R, Anderson DJ, Moench TR. Vaginal microbicides: detecting toxicities in vivo that paradoxically increase pathogen transmission. BMC Infect Dis 2006; 6:90. [PMID: 16740164 PMCID: PMC1523343 DOI: 10.1186/1471-2334-6-90] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2005] [Accepted: 06/01/2006] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Microbicides must protect against STD pathogens without causing unacceptable toxic effects. Microbicides based on nonoxynol-9 (N9) and other detergents disrupt sperm, HSV and HIV membranes, and these agents are effective contraceptives. But paradoxically N9 fails to protect women against HIV and other STD pathogens, most likely because it causes toxic effects that increase susceptibility. The mouse HSV-2 vaginal transmission model reported here: (a) Directly tests for toxic effects that increase susceptibility to HSV-2, (b) Determines in vivo whether a microbicide can protect against HSV-2 transmission without causing toxicities that increase susceptibility, and (c) Identifies those toxic effects that best correlate with the increased HSV susceptibility. METHODS Susceptibility was evaluated in progestin-treated mice by delivering a low-dose viral inoculum (0.1 ID50) at various times after delivering the candidate microbicide to detect whether the candidate increased the fraction of mice infected. Ten agents were tested - five detergents: nonionic (N9), cationic (benzalkonium chloride, BZK), anionic (sodium dodecylsulfate, SDS), the pair of detergents in C31G (C14AO and C16B); one surface active agent (chlorhexidine); two non-detergents (BufferGel, and sulfonated polystyrene, SPS); and HEC placebo gel (hydroxyethylcellulose). Toxic effects were evaluated by histology, uptake of a 'dead cell' dye, colposcopy, enumeration of vaginal macrophages, and measurement of inflammatory cytokines. RESULTS A single dose of N9 protected against HSV-2 for a few minutes but then rapidly increased susceptibility, which reached maximum at 12 hours. When applied at the minimal concentration needed for brief partial protection, all five detergents caused a subsequent increase in susceptibility at 12 hours of approximately 20-30-fold. Surprisingly, colposcopy failed to detect visible signs of the N9 toxic effect that increased susceptibility at 12 hours. Toxic effects that occurred contemporaneously with increased susceptibility were rapid exfoliation and re-growth of epithelial cell layers, entry of macrophages into the vaginal lumen, and release of one or more inflammatory cytokines (Il-1beta, KC, MIP 1alpha, RANTES). The non-detergent microbicides and HEC placebo caused no significant increase in susceptibility or toxic effects. CONCLUSION This mouse HSV-2 model provides a sensitive method to detect microbicide-induced toxicities that increase susceptibility to infection. In this model, there was no concentration at which detergents provided protection without significantly increasing susceptibility.
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Affiliation(s)
- Richard A Cone
- Mucosal Protection Laboratory, Dept. of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA
- ReProtect, Inc., Baltimore, MD 21286, USA
| | - Timothy Hoen
- Mucosal Protection Laboratory, Dept. of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA
| | - XiXi Wong
- Mucosal Protection Laboratory, Dept. of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Raed Abusuwwa
- Mucosal Protection Laboratory, Dept. of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Deborah J Anderson
- Obstetrics and Gynecology, Boston University Medical Campus, Boston, MA 02118, USA
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