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Thakrar J, Patel A, Joseph J. UK national survey on surgical gowning for tonsillectomy. J Laryngol Otol 2024:1-4. [PMID: 38563203 DOI: 10.1017/s0022215124000331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
OBJECTIVE Tonsillectomy is a common procedure performed nationally. The personal protective equipment and surgical gowning practices used during this procedure vary widely. We compiled a survey of ENT specialists to gain a national opinion about gowning in tonsillectomy with the aim of determining whether we could make it more environmentally friendly whilst maintaining the highest safety standards. METHOD We developed a nine-question survey that was piloted prior to final implementation. The questionnaire was sent to senior registrars and consultant otolaryngologists in the UK. RESULTS The survey was completed by a total of 63 ENT specialists. It was found that 82.54 per cent of clinicians would consider wearing a reusable gown that would be sterilised between each procedure. CONCLUSION Our survey suggests most ENT clinicians would consider using a more environmentally friendly surgical gown and some may even consider wearing no gown at all, although many are understandably concerned about the transmission of infection or blood splatter.
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Affiliation(s)
- Jai Thakrar
- School of Medicine, University College London, London, UK
| | - Ankit Patel
- ENT Department, University College London Hospital, London, UK
| | - Jonathan Joseph
- ENT Department, University College London Hospital, London, UK
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Teli P, Soni S, Teli S, Agarwal S. Unlocking Diversity: From Simple to Cutting-Edge Synthetic Methodologies of Bis(indolyl)methanes. Top Curr Chem (Cham) 2024; 382:8. [PMID: 38403746 DOI: 10.1007/s41061-024-00454-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 01/31/2024] [Indexed: 02/27/2024]
Abstract
From a synthetic perspective, bis(indolyl)methanes have undergone extensive investigation over the past two to three decades owing to their remarkable pharmacological activities, encompassing anticancer, antimicrobial, antioxidant, and antiinflammatory properties. These highly desirable attributes have spurred significant interest within the scientific community, leading to the development of various synthetic strategies that are not only more efficient but also ecofriendly. This synthesis-based literature review delves into the advancements made in the past 5 years, focusing on the synthesis of symmetrical as well as unsymmetrical bis(indolyl)methanes. The review encompasses a wide array of methods, ranging from well-established techniques to more unconventional and innovative approaches. Furthermore, it highlights the exploration of various substrates, encompassing readily available chemicals such as indole, aldehydes/ketones, indolyl methanols, etc. as well as the use of some specific compounds as starting materials to achieve the synthesis of this invaluable molecule. By encapsulating the latest developments in this field, this review provides insights into the expanding horizons of bis(indolyl)methane synthesis.
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Affiliation(s)
- Pankaj Teli
- Department of Chemistry, Synthetic Organic Chemistry Laboratory, MLSU, Udaipur, Rajasthan, India
| | - Shivani Soni
- Department of Chemistry, Synthetic Organic Chemistry Laboratory, MLSU, Udaipur, Rajasthan, India
| | - Sunita Teli
- Department of Chemistry, Synthetic Organic Chemistry Laboratory, MLSU, Udaipur, Rajasthan, India
| | - Shikha Agarwal
- Department of Chemistry, Synthetic Organic Chemistry Laboratory, MLSU, Udaipur, Rajasthan, India.
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The Anticancer Agent 3,3'-Diindolylmethane Inhibits Multispecies Biofilm Formation by Acne-Causing Bacteria and Candida albicans. Microbiol Spectr 2022; 10:e0205621. [PMID: 35107361 PMCID: PMC8809333 DOI: 10.1128/spectrum.02056-21] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The Gram-positive anaerobic bacterium Cutibacterium acnes is a major inhabitant of human skin and has been implicated in acne vulgaris formation and in the formation of multispecies biofilms with other skin-inhabiting organisms like Staphylococcus aureus and Candida albicans. Indoles are widespread in nature (even in human skin) and function as important signaling molecules in diverse prokaryotes and eukaryotes. In the present study, we investigated the antibacterial and antibiofilm activities of 20 indoles against C. acnes. Of the indoles tested, indole-3-carbinol at 0.1 mM significantly inhibited biofilm formation by C. acnes without affecting planktonic cell growth, and the anticancer drug 3,3'-diindolylmethane (DIM) at 0.1 mM (32 μg/mL) also significantly inhibited planktonic cell growth and biofilm formation by C. acnes, whereas the other indoles and indole itself were less effective. Also, DIM at 0.1 mM successfully inhibited multispecies biofilm formation by C. acnes, S. aureus, and C. albicans. Transcriptional analyses showed that DIM inhibited the expressions of several biofilm-related genes in C. acnes, and at 0.05 mM, DIM inhibited hyphal formation and cell aggregation by C. albicans. These results suggest that DIM and other indoles inhibit biofilm formation by C. acnes and have potential use for treating C. acnes associated diseases. IMPORTANCE Since indoles are widespread in nature (even in human skin), we hypothesized that indole and its derivatives might control biofilm formation of acne-causing bacteria (Cutibacterium acnes and Staphylococcus aureus) and fungal Candida albicans. The present study reports for the first time the antibiofilm and antimicrobial activities of several indoles on C. acnes. Of the indoles tested, two anticancer agents, indole-3-carbinol and 3,3'-diindolylmethane found in cruciferous vegetables, significantly inhibited biofilm formation by C. acnes. Furthermore, the most active 3,3'-diindolylmethane successfully inhibited multispecies biofilm formation by C. acnes, S. aureus, and C. albicans. Transcriptional analyses showed that 3,3'-diindolylmethane inhibited the expressions of several biofilm-related genes including lipase, hyaluronate lyase, and virulence-related genes in C. acnes, and 3,3'-diindolylmethane inhibited hyphal formation and cell aggregation by C. albicans. Our findings show that 3,3'-diindolylmethane offers a potential means of controlling acne vulgaris and multispecies biofilm-associated infections due to its antibiofilm and antibiotic properties.
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HPV and Recurrent Respiratory Papillomatosis: A Brief Review. Life (Basel) 2021; 11:life11111279. [PMID: 34833157 PMCID: PMC8618609 DOI: 10.3390/life11111279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 12/26/2022] Open
Abstract
Recurrent Respiratory Papillomatosis (RRP) is a rare but severe manifestation of human papillomavirus (HPV). As our knowledge about HPV infections has expanded, it has become possible to understand the course of RRP disease and unravel plausible efficient methods to manage the disease. However, the surge in reports on HPV has not been accompanied by a similar increase in research about RRP specifically. In this paper, we review the clinical manifestation and typical presentation of the illness. In addition, the pathogenesis and progression of the disease are described. On the other hand, we discuss the types of treatments currently available and future treatment strategies. The role of vaccination in both the prevention and treatment of RRP will also be reviewed. We believe this review is essential to update the general knowledge on RRP with the latest information available to date to enhance our understanding of RRP and its management.
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Guo G, Yuan Y, Bao X, Cao X, Sang T, Wang J, Huo C. Photocatalytic Redox-Neutral Approach to Diarylmethanes. Org Lett 2021; 23:6936-6940. [PMID: 34427451 DOI: 10.1021/acs.orglett.1c02523] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report a visible-light induced redox-neutral decarboxylative cross coupling reaction of indole-3-acetic acid NHPI esters with indoles using a Ru photosensitizer to deliver a wide range of symmetrical and unsymmetrical 3,3'-bisindolylmethane derivatives. Furthermore, the reaction is readily adapted to the preparation of a wide variety of diarylmethane derivatives.
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Affiliation(s)
- Guozhe Guo
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yong Yuan
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Xiazhen Bao
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Xuehui Cao
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Tongzhi Sang
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Jiayuan Wang
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Congde Huo
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
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Infantile recurrent respiratory papillomatosis: review of adjuvant therapies. The Journal of Laryngology & Otology 2021; 135:958-963. [PMID: 34470689 DOI: 10.1017/s0022215121002322] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Recurrent respiratory papillomatosis is a potentially life-threatening condition characterised by the growth of exophytic lesions within the larynx and trachea. The principal aim of management is maintenance of an adequate airway by surgical debulking. Several adjuvant therapies have been used to varying effect to reduce the burden of this disease and increase the interval between debulking procedures. The most severe cases present in children aged under three years, who are therefore most likely to need adjuvant therapies. The current evidence base on adjuvant treatments relating to children who present aged under three years has been reviewed. METHODS A literature review of articles in Cochrane, PubMed and Embase databases was carried out. Given the rarity of the condition in this age group, all the literature relates to case reports and case series. RESULTS AND CONCLUSION The following adjuvant therapies have been used in children who presented under three years of age: quadrivalent human papilloma virus vaccine, intralesional cidofovir, pegylated interferon, alpha-interferon, cimetidine and cetuximab.
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Jin J, Li Y, Xiang S, Fan W, Guo S, Huang D. Selectfluor facilitated bridging of indoles to bis(indolyl)methanes using methyl tert-butyl ether as a new methylene precursor. Org Biomol Chem 2021; 19:4076-4081. [PMID: 33978036 DOI: 10.1039/d1ob00120e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, green and efficient method is developed for the synthesis of methylene bridged bis(indolyl)methanes in good to excellent yields. The reaction employs methyl tert-butyl ether (MTBE) as the methylene source and selectfluor as an oxidizing agent. The scope and versatility of the methods have been successfully demonstrated with 48 examples. The metal-free transformation process is suitable for scale-up production. A selectfluor-promoted oxidative reaction mechanism is proposed based on the results of the experimental studies.
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Affiliation(s)
- Jiang Jin
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China
| | - Yinghua Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
| | - Shiqun Xiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
| | - Weibin Fan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
| | - Shiwei Guo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
| | - Deguang Huang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
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8
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Affiliation(s)
- Debasish Sarmah
- Department of Chemical SciencesTezpur University, Napaam Tezpur Assam India, Pin 784028
| | - Utpal Bora
- Department of Chemical SciencesTezpur University, Napaam Tezpur Assam India, Pin 784028
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9
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Świderska-Kiec J, Czajkowski K, Zaręba-Szczudlik J, Kacperczyk-Bartnik J, Bartnik P, Romejko-Wolniewicz E. Comparison of HPV Testing and Colposcopy in Detecting Cervical Dysplasia in Patients With Cytological Abnormalities. In Vivo 2020; 34:1307-1315. [PMID: 32354923 DOI: 10.21873/invivo.11906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/02/2020] [Accepted: 02/03/2020] [Indexed: 12/31/2022]
Abstract
AIM The aim of the study was to compare the diagnostic value of HPV testing and colposcopy in patients with abnormal cytology results. PATIENTS AND METHODS A total of 186 women with cytological abnormalities were included in the study. The patients underwent colposcopy examinations and DNA HPV testing of cervical smear with genotyping. RESULTS The HPV test was demonstrated to be more sensitive (79.4%) than specific (60.2%) and was more sensitive than colposcopy for detecting CIN changes (79.4% vs. 73.7%). Combined tests achieved a high sensitivity (90.9%) and negative predictive value (96.1%) in detecting patients with CIN2+ and demonstrated the highest positive predictive value (77.3%) for detecting CIN1+. Colposcopy had a very good specificity (83.5%) and positive predictive value (71.2%) in finding CIN1+ cases. CONCLUSION HPV tests showed a higher sensitivity than colposcopy, but colposcopy results presented higher specificity. Combining HPV testing and colposcopy proved to be the most efficient method for detecting CIN lesions.
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Affiliation(s)
- Joanna Świderska-Kiec
- 2 Department of Obstetrics and Gynaecology, Medical University of Warsaw, Warsaw, Poland
| | - Krzysztof Czajkowski
- 2 Department of Obstetrics and Gynaecology, Medical University of Warsaw, Warsaw, Poland
| | - Julia Zaręba-Szczudlik
- 2 Department of Obstetrics and Gynaecology, Medical University of Warsaw, Warsaw, Poland
| | | | - Paweł Bartnik
- 2 Department of Obstetrics and Gynaecology, Medical University of Warsaw, Warsaw, Poland
| | - Ewa Romejko-Wolniewicz
- 2 Department of Obstetrics and Gynaecology, Medical University of Warsaw, Warsaw, Poland
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Rahman I, Deka B, Deb ML, Baruah PK. C‐C Bond Cleavage by the Reaction of Cyclic Amines or Indoles with Activated Olefins: A Redox‐Neutral Mechanism for the Reducing Action of Tetrahydroisoquinolines. ChemistrySelect 2019. [DOI: 10.1002/slct.201902655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Iftakur Rahman
- Department of Applied SciencesGUISTGauhati University Guwahati 781014, Assam India
| | - Bhaskar Deka
- Department of Applied SciencesGUISTGauhati University Guwahati 781014, Assam India
| | - Mohit L. Deb
- Department of Applied SciencesGUISTGauhati University Guwahati 781014, Assam India
| | - Pranjal K. Baruah
- Department of Applied SciencesGUISTGauhati University Guwahati 781014, Assam India
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Ali R, Ahamad MZ, Singh S, Haq W. Regioselective Synthesis of Symmetrical and Unsymmetrical Bis(heteroaryl)methane (BHM)-Containing Amino Acids. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Rafat Ali
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; -226031 Lucknow India
| | - Mohd. Zisan Ahamad
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; -226031 Lucknow India
| | - Shalini Singh
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; -226031 Lucknow India
| | - Wahajul Haq
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; -226031 Lucknow India
- Academy of Scientific and Innovative Research; -11000 New Delhi India
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12
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Fortes HR, Ranke FMV, Escuissato DL, Araujo Neto CA, Zanetti G, Hochhegger B, Irion KL, Souza CA, Marchiori E. Laryngotracheobronchial papillomatosis: chest CT findings. J Bras Pneumol 2018; 43:259-263. [PMID: 29364999 PMCID: PMC5687961 DOI: 10.1590/s1806-37562016000000351] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 03/17/2017] [Indexed: 01/13/2023] Open
Abstract
To evaluate the findings on chest CTs in 16 patients (8 men and 8 women) with laryngotracheobronchial papillomatosis.
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Affiliation(s)
- Helena Ribeiro Fortes
- . Programa de Pós-Graduação em Radiologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro (RJ) Brasil
| | | | - Dante Luiz Escuissato
- . Disciplina de Radiologia, Departamento de Clínica Médica, Universidade Federal do Paraná - UFPR- Curitiba (PR) Brasil
| | - Cesar Augusto Araujo Neto
- . Departamento de Medicina e Apoio Diagnóstico, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
| | - Gláucia Zanetti
- . Programa de Pós-Graduação em Radiologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro (RJ) Brasil.,. Disciplina de Clinica Médica, Faculdade de Medicina de Petrópolis, Petrópolis (RJ) Brasil
| | - Bruno Hochhegger
- . Disciplina de Diagnóstico por Imagem, Universidade Federal de Ciências da Saúde de Porto Alegre (RS) Brasil
| | | | - Carolina Althoff Souza
- . Department of Diagnostic Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
| | - Edson Marchiori
- . Programa de Pós-Graduação em Radiologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro (RJ) Brasil.,. Disciplina de Radiologia, Universidade Federal Fluminense, Niterói (RJ) Brasil
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Pillaiyar T, Gorska E, Schnakenburg G, Müller CE. General Synthesis of Unsymmetrical 3,3'-(Aza)diindolylmethane Derivatives. J Org Chem 2018; 83:9902-9913. [PMID: 30025207 DOI: 10.1021/acs.joc.8b01349] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Diindolylmethane (DIM) and its derivatives have recently been in the focus of interest due to their significant biological activities, specifically in cancer prevention and therapy. Molecular targets of DIM have been identified, e.g., the immunostimulatory G protein-coupled receptor GPR84. However, most of the reported and investigated DIM derivatives are symmetrical because general methods for obtaining unsymmetrical DIMs have been lacking. To optimize the interaction of DIM derivatives with their protein targets, unsymmetrical substitution is required. In the present study we developed a new, mild and efficient access to unsymmetrically substituted 3,3'-DIMs by reaction of (3-indolylmethyl)trimethylammonium iodides with a wide range of substituted indole derivatives. 7-Azaindole also led to the 3,3'-connected DIM analogue, while 4- and 5-azaindoles reacted at the N1-nitrogen atom as confirmed by X-ray crystallography. The reactions were performed in water without the requirement of a catalyst or other additives. Wide substrate scope, operational simplicity, environmentally benign workup, and high yields are further advantages of the new method. The synthetic protocol proved to be suitable for upscaling to yield gram amounts for pharmacological studies. This procedure will allow the preparation of a broad range of novel, unsymmetrical DIM derivatives to exploit their potential as novel drugs.
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Affiliation(s)
- Thanigaimalai Pillaiyar
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I , University of Bonn , An der Immenburg 4 , D-53121 Bonn , Germany
| | - Ewelina Gorska
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I , University of Bonn , An der Immenburg 4 , D-53121 Bonn , Germany
| | - Gregor Schnakenburg
- Institute of Inorganic Chemistry , University of Bonn , Gerhard-Domagk-Str. 1 , D-53121 Bonn , Germany
| | - Christa E Müller
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I , University of Bonn , An der Immenburg 4 , D-53121 Bonn , Germany
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A DFT Study of the Geometrical, Spectroscopical and Reactivity Properties of Diindolylmethane-Phenylboronic Acid Hybrids. MOLECULES (BASEL, SWITZERLAND) 2017; 22:molecules22101744. [PMID: 29039759 PMCID: PMC6151590 DOI: 10.3390/molecules22101744] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 10/12/2017] [Indexed: 01/11/2023]
Abstract
The structure of the ortho-, meta- and para- hybrid diindolylmethane-phenylboronic acids and their interactions were optimized with by a quantum chemical method, using density functional theory at the (DFT) level. Thus, infrared bands were assigned based on the scaled theoretical wavenumbers by correlating the respective experimental data of the molecules. In addition, the corresponding 1H-/13C-/11B-NMR experimental and theoretical chemical shifts were correlated. The target molecules showed a poor treatment of the OH shifts in the GIAO method due to the absence of explicit solvent effects in these calculations; therefore, they were explicitly considered with acetone molecules. Moreover, the electron density at the hydrogen bond critical point increased, generating stabilization energy, from weak to moderate or weak to strong, serving as an indicator of the strength of the hydrogen bond between the different intermolecular interactions. Finally, some properties related to the reactive behavior of the target molecules associated with their cytotoxic effects and metabolic pathways were also calculated.
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Yehya AH, Asif M, Tan YJ, Sasidharan S, Abdul Majid AM, Oon CE. Broad spectrum targeting of tumor vasculature by medicinal plants: An updated review. J Herb Med 2017. [DOI: 10.1016/j.hermed.2017.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Fortes HR, von Ranke FM, Escuissato DL, Araujo Neto CA, Zanetti G, Hochhegger B, Souza CA, Marchiori E. Recurrent respiratory papillomatosis: A state-of-the-art review. Respir Med 2017; 126:116-121. [DOI: 10.1016/j.rmed.2017.03.030] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 03/26/2017] [Accepted: 03/31/2017] [Indexed: 10/19/2022]
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MPP+ induces necrostatin-1- and ferrostatin-1-sensitive necrotic death of neuronal SH-SY5Y cells. Cell Death Discov 2017; 3:17013. [PMID: 28250973 PMCID: PMC5327502 DOI: 10.1038/cddiscovery.2017.13] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 12/16/2016] [Accepted: 01/10/2017] [Indexed: 12/13/2022] Open
Abstract
Regulation of cell death is potentially a powerful treatment modality for intractable diseases such as neurodegenerative diseases. Although there have been many reports about the possible involvement of various types of cell death in neurodegenerative diseases, it is still unclear exactly how neurons die in patients with these diseases, thus treatment strategies based on cell death regulation have not been established yet. To obtain some insight into the mechanisms of cell death involved in neurodegenerative diseases, we studied the effect of 1-methyl-4-phenylpyridinium (MPP+) on the human neuroblastoma cell line SH-SY5Y (a widely used model of Parkinson’s disease). We found that MPP+ predominantly induced non-apoptotic death of neuronally differentiated SH-SY5Y cells. This cell death was strongly inhibited by necrostatin-1 (Nec-1), a necroptosis inhibitor, and by an indole-containing compound (3,3′-diindolylmethane: DIM). However, it occurred independently of receptor-interacting serine/threonine-protein kinase 1/3 (RIP1/RIP3), indicating that this form of cell death was not necroptosis. MPP+-induced cell death was also inhibited by several inhibitors of ferroptosis, including ferrostatin-1 (Fer-1). Although MPP+-induced death and ferroptosis shared some features, such as occurrence of lipid peroxidation and inhibition by Fer-1, MPP+-induced death seemed to be distinct from ferroptosis because MPP+-induced death (but not ferroptosis) was inhibited by Nec-1, was independent of p53, and was accompanied by ATP depletion and mitochondrial swelling. Further investigation of MPP+-induced non-apoptotic cell death may be useful for understanding the mechanisms of neuronal loss and for treatment of neurodegenerative diseases such as Parkinson’s disease.
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Deb ML, Borpatra PJ, Pegu CD, Thakuria R, Saikia PJ, Baruah PK. Iodine/tert-Butyl Hydroperoxide-Mediated Reaction of Indoles with Dimethylformamide/Dimethylacetamide to Synthesize Bis- and Tris(indolyl)methanes. ChemistrySelect 2017. [DOI: 10.1002/slct.201601857] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Mohit L. Deb
- Department of Applied Sciences, GUIST; Gauhati University; Guwahati 781014 Assam India
| | - Paran J. Borpatra
- Department of Applied Sciences, GUIST; Gauhati University; Guwahati 781014 Assam India
| | - Choitanya Dev Pegu
- Department of Applied Sciences, GUIST; Gauhati University; Guwahati 781014 Assam India
| | - Ranjit Thakuria
- Department of Chemistry; Gauhati University; Guwahati- 781014 Assam India
| | - Prakash J. Saikia
- Analytical Chemistry Division; CSIR-NEIST; Jorhat- 785006, Assam India
| | - Pranjal K. Baruah
- Department of Applied Sciences, GUIST; Gauhati University; Guwahati 781014 Assam India
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Deb ML, Borpatra PJ, Saikia PJ, Baruah PK. Introducing tetramethylurea as a new methylene precursor: a microwave-assisted RuCl3-catalyzed cross dehydrogenative coupling approach to bis(indolyl)methanes. Org Biomol Chem 2017; 15:1435-1443. [DOI: 10.1039/c6ob02671k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The microwave-assisted synthesis of symmetrical/unsymmetrical bis(indolyl)methanes using tetramethylurea as a methylene source.
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Affiliation(s)
- Mohit L. Deb
- Department of Applied Sciences
- GUIST
- Gauhati University
- Guwahati-781014
- India
| | - Paran J. Borpatra
- Department of Applied Sciences
- GUIST
- Gauhati University
- Guwahati-781014
- India
| | | | - Pranjal K. Baruah
- Department of Applied Sciences
- GUIST
- Gauhati University
- Guwahati-781014
- India
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Li F, Xu Y, Chen C, Chen SM, Xiao BK, Tao ZZ. Pro-apoptotic and anti-proliferative effects of 3,3'-diindolylmethane in nasopharyngeal carcinoma cells via downregulation of telomerase activity. Mol Med Rep 2015; 12:3815-3820. [PMID: 26004560 DOI: 10.3892/mmr.2015.3836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 04/28/2015] [Indexed: 11/05/2022] Open
Abstract
The pro-apoptotic and anti-proliferative effects of 3,3'-diindolylmethane (DIM) in various tumor cell types have been widely investigated. The underlying mechanisms were suggested to include cell cycle arrest, cell signaling inhibition and downregulation of the androgen receptor. The present study demonstrated that DIM induced apoptosis and inhibited proliferation in nasopharyngeal carcinoma cells by downregulating the activity of telomerase. The nasopharyngeal carcinoma cell line 5‑8F was selected for this purpose. A cell counting kit‑8 assay and flow cytometry were performed to detect apoptosis and proliferation of 5‑8F cells, respectively, which revealed the pro‑apoptotic and anti‑proliferative effects of DIM. Telomerase activity was detected using a telomeric repeat amplification protocol assay, which revealed that the telomerase activity was inhibited by DIM in a dose‑dependent manner. Reverse transcription polymerase chain reaction was used to detect the mRNA expression levels of human telomerase reverse transcriptase (hTERT) and human telomerase RNA (hTR), and western blot analysis was used to detect the protein expression of hTERT. The results showed that the mRNA and protein expression of hTERT were downregulated in 5‑8F cells following treatment with DIM; however, the mRNA expression of hTR remained unchanged, suggesting that hTERT was the target of DIM. To further identify the target, the length of telomeres was continually measured using a telomere length detection kit, revealing that the telomeres were shortened by DIM in an concentration‑dependent manner. The present study confirmed that DIM had pro‑apoptotic and anti‑proliferative effects in nasopharyngeal carcinoma cells by regulating telomerase.
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Affiliation(s)
- Fen Li
- Research Institute of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Yong Xu
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Chen Chen
- Research Institute of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Shi-Ming Chen
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Bo-Kui Xiao
- Research Institute of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Ze-Zhang Tao
- Research Institute of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
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Pondugula SR, Flannery PC, Abbott KL, Coleman ES, Mani S, Samuel T, Xie W. Diindolylmethane, a naturally occurring compound, induces CYP3A4 and MDR1 gene expression by activating human PXR. Toxicol Lett 2014; 232:580-9. [PMID: 25542144 DOI: 10.1016/j.toxlet.2014.12.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 12/08/2014] [Accepted: 12/20/2014] [Indexed: 11/24/2022]
Abstract
Activation of human pregnane X receptor (hPXR)-regulated expression of cytochrome P450 3A4 (CYP3A4) and multidrug resistance protein 1 (MDR1) plays an important role in mediating adverse drug interactions. Given the common use of natural products as part of adjunct human health behavior, there is a growing concern about natural products for their potential to induce undesired drug interactions through the activation of hPXR-regulated CYP3A4 and MDR1. Here, we studied whether 3,3'-diindolylmethane (DIM), a natural health supplement, could induce hPXR-mediated regulation of CYP3A4 and MDR1 in human hepatocytes and intestinal cells. DIM, at its physiologically relevant concentrations, not only induced hPXR transactivation of CYP3A4 promoter activity but also induced gene expression of CYP3A4 and MDR1. DIM decreased intracellular accumulation of MDR1 substrate rhodamine 123, suggesting that DIM induces the functional expression of MDR1. Pharmacologic inhibition or genetic knockdown of hPXR resulted in attenuation of DIM induced CYP3A4 and MDR1 gene expression, suggesting that DIM induces CYP3A4 and MDR1 in an hPXR-dependent manner. Together, these results support our conclusion that DIM induces hPXR-regulated CYP3A4 and MDR1 gene expression. The inductive effects of DIM on CYP3A4 and MDR1 expression caution the use of DIM in conjunction with other medications metabolized and transported via CYP3A4 and MDR1, respectively.
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Affiliation(s)
- Satyanarayana R Pondugula
- Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, AL, United States; Auburn University Research Initiative in Cancer, Auburn University, Auburn, AL, United States.
| | - Patrick C Flannery
- Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, AL, United States; Auburn University Research Initiative in Cancer, Auburn University, Auburn, AL, United States
| | - Kodye L Abbott
- Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, AL, United States; Auburn University Research Initiative in Cancer, Auburn University, Auburn, AL, United States
| | - Elaine S Coleman
- Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, AL, United States
| | - Sridhar Mani
- Albert Einstein Cancer Center, Albert Einstein College of Medicine, New York, NY, United States
| | - Temesgen Samuel
- Department of Pathobiology, College of Veterinary Medicine, Nursing and Allied Health, Tuskegee University, AL, United States
| | - Wen Xie
- Center for Pharmacogenetics and Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA, United States
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22
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Hočevar-Boltežar I, Matičič M, Šereg-Bahar M, Gale N, Poljak M, Kocjan B, Žargi M. Human papilloma virus vaccination in patients with an aggressive course of recurrent respiratory papillomatosis. Eur Arch Otorhinolaryngol 2014; 271:3255-62. [DOI: 10.1007/s00405-014-3143-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 06/10/2014] [Indexed: 10/25/2022]
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Zhang WW, Feng Z, Narod SA. Multiple therapeutic and preventive effects of 3,3'-diindolylmethane on cancers including prostate cancer and high grade prostatic intraepithelial neoplasia. J Biomed Res 2014; 28:339-48. [PMID: 25332705 PMCID: PMC4197384 DOI: 10.7555/jbr.28.20140008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 02/07/2014] [Accepted: 02/22/2014] [Indexed: 12/20/2022] Open
Abstract
Cruciferous vegetables belong to the plant family that has flowers with four equal-sized petals in the pattern of a crucifer cross. These vegetables are an abundant source of dietary phytochemicals, including glucosinolates and their hydrolysis products such as indole-3-carbinol (I3C) and 3,3′-diindolylmethane (DIM). By 2013, the total number of natural glucosinolates that have been documented is estimated to be 132. Recently, cruciferous vegetable intake has garnered great interest for its multiple health benefits such as anticancer, antiviral infections, human sex hormone regulation, and its therapeutic and preventive effects on prostate cancer and high grade prostatic intraepithelial neoplasia (HGPIN). DIM is a hydrolysis product of glucosinolates and has been used in various trials. This review is to provide an insight into the latest developments of DIM in treating or preventing both prostate cancer and HGPIN.
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Affiliation(s)
- William Weiben Zhang
- Division of Urology, Sunnybrook Health Sciences Centre, Sunnybrook Research Institute, University of Toronto, Toronto, Ontario M4N 3M5, Canada
| | - Zhenqing Feng
- Department of Pathology, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Steven A Narod
- Department of Public Health Sciences, Women's College Hospital, Women's College Research Institute, University of Toronto, Toronto, Ontario M4N 3M5, Canada
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Niyibizi J, Rodier C, Wassef M, Trottier H. Risk factors for the development and severity of juvenile-onset recurrent respiratory papillomatosis: a systematic review. Int J Pediatr Otorhinolaryngol 2014; 78:186-97. [PMID: 24367938 DOI: 10.1016/j.ijporl.2013.11.036] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 11/28/2013] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Juvenile-onset recurrent respiratory papillomatosis (JoRRP) is a rare yet aggressive disease caused by human papillomavirus (HPV). Although many newborns are likely exposed to HPV, few develop JoRRP and the clinical course of the disease varies from one child to another. This systematic review seeks to provide an up-to-date understanding of the risk factors for acquisition and severity. METHODS We conducted a comprehensive literature search in EMBASE, MEDLINE and EBMR databases using various combinations of keywords related to JoRRP etiology, risk factors and severity. We also searched Google Scholar and the reference lists of eligible studies. Our search was limited to original studies published in French or English between 1995 and July 2012 and to patients under 20 years of age. RESULTS Of 1362 citations, we retrieved 102 articles and found 14 additional studies. We retained 32 studies meeting inclusion criteria. All were observational and together included 2296 JoRRP cases. Risk factors could be classified mainly as maternal and birth history, viral genotype, and host factors. A history of genital warts during pregnancy and delivery was strongly linked to the development of JoRRP. Depending on ethnicity, specific human leukocyte antigen class II alleles and immune response factors were important determinants of JoRRP acquisition and severity. HPV-11 genotype and younger age at onset of JoRRP were important predictors of severity. CONCLUSIONS Genetic and immunological profiles underlying the acquisition and clinical course are not readily modifiable. Thus, preventing condylomas in women of childbearing age could reduce the burden of this life-threatening disease.
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Affiliation(s)
- Joseph Niyibizi
- Department of Social and Preventive Medicine, University of Montreal, Public Health School 7101, Avenue du Parc, 3rd Floor, Montreal, Quebec H3N 1X9, Canada; Sainte Justine Hospital (CHU Sainte-Justine), 3175 Chemin de la Côte Ste-Catherine, Room A-830, Montreal, Quebec H3T 1C5, Canada
| | - Caroline Rodier
- Department of Social and Preventive Medicine, University of Montreal, Public Health School 7101, Avenue du Parc, 3rd Floor, Montreal, Quebec H3N 1X9, Canada; Merck Canada Inc., 16711 Route Transcanadienne, Kirkland, Quebec H9H 3L1, Canada
| | - Maggy Wassef
- Sainte Justine Hospital (CHU Sainte-Justine), 3175 Chemin de la Côte Ste-Catherine, Room A-830, Montreal, Quebec H3T 1C5, Canada
| | - Helen Trottier
- Department of Social and Preventive Medicine, University of Montreal, Public Health School 7101, Avenue du Parc, 3rd Floor, Montreal, Quebec H3N 1X9, Canada; Sainte Justine Hospital (CHU Sainte-Justine), 3175 Chemin de la Côte Ste-Catherine, Room A-830, Montreal, Quebec H3T 1C5, Canada.
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Busbee PB, Rouse M, Nagarkatti M, Nagarkatti PS. Use of natural AhR ligands as potential therapeutic modalities against inflammatory disorders. Nutr Rev 2013; 71:353-69. [PMID: 23731446 DOI: 10.1111/nure.12024] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The aim of this review is to discuss research involving ligands for the aryl hydrocarbon receptor (AhR) and their role in immunomodulation. While activation of the AhR is well known for its ability to regulate the biochemical and toxic effects of environmental chemicals, more recently an exciting discovery has been made indicating that AhR ligation can also regulate T-cell differentiation, specifically through activation of Foxp3(+) regulatory T cells (Tregs) and downregulation of the proinflammatory Th17 cells. Such findings have opened new avenues of research on the possibility of targeting the AhR to treat inflammatory and autoimmune diseases. Specifically, this review will discuss the current research involving natural and dietary AhR ligands. In addition, evidence indicating the potential use of these ligands in regulating inflammation in various diseases will be highlighted. The importance of the AhR in immunological processes can be illustrated by expression of this receptor on a majority of immune cell types. In addition, AhR signaling pathways have been reported to influence a number of genes responsible for mediating inflammation and other immune responses. As interest in the AhR and its ligands increases, it seems prudent to consolidate current research on the contributions of these ligands to immune regulation during the course of inflammatory diseases.
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Affiliation(s)
- Philip B Busbee
- Department of Pathology, Microbiology, and Immunology, University of South Carolina School of Medicine, Columbia, South Carolina 29208, USA
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26
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A Green Approach to the Production of Hybrid Diindolylmethane-Phenylboronic Acids via a 3MCR: Promising Antineoplasic Molecules. J CHEM-NY 2013. [DOI: 10.1155/2013/531208] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The current role of the “Green Chemistry Protocol” in multicomponent reactions is first highlighted. Then, the green approach to the production of three novel hybrid diindolylmethanes-phenylboronic acids via a 3MCR is discussed, which features the following: solventless conditions, the use of microwave irradiation to activate the reactions, the absence of catalyst, and an efficient atom economy. The products were achieved with moderate yields (41–61%) within a short time frame (5 min) and appropriately characterized by elemental analysis and spectroscopic methods (NMR:1H,13C,11B; MS: EI, CI, FAB+, HRMS). During the FAB+MS determinations, various artifacts that are associated with the boron atom via an interaction with thioglycerol from the matrix were noted in the corresponding FAB+mass spectra; in addition, the accurate mass determination of these adducts unequivocally confirmed the presence of the target molecules. Moreover, the activity of these target molecules was evaluated in the presence of six cancer cell lines (U251 = glia of the central nerve system, PC-3 = prostate, K562 = leukemia, HCT-15 = colon, MCF-7 = breast, and SKLU-1 = lung), which resulted in themeta-regioisomer being the most active. Finally, the products were also analyzed using computational chemistry in order to determine their most stable geometries and reactivities by computing the respective molecular electrostatic potentials.
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27
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Louw L. Effects of conjugated linoleic acid and high oleic acid safflower oil in the treatment of children with HPV-induced laryngeal papillomatosis: a randomized, double-blinded and crossover preliminary study. Lipids Health Dis 2012; 11:136. [PMID: 23061633 PMCID: PMC3551644 DOI: 10.1186/1476-511x-11-136] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Accepted: 09/05/2012] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Surgery is the mainstay therapy for HPV-induced laryngeal papillomatosis (LP) and adjuvant therapies are palliative at best. Research revealed that conjugated-linoleic acid (CLA) may improve the outcome of virally-induced diseases. The effects of Clarinol™ G-80 (CLA) and high oleic safflower oil (HOSF) on children with LP (concomitant with surgery) were evaluated. DESIGN A randomized, double-blinded, crossover and reference-oil controlled trial was conducted at a South African medical university. Study components included clinical, HPV type/load and lymphocyte/cytokine analyses, according to routine laboratory methods. PARTICIPANTS Overall: ten children enrolled; eight completed the trial; five remained randomized; seven received CLA first; all treatments remained double-blinded. INTERVENTION Children (4 to 12 years) received 2.5 ml p/d CLA (8 weeks) and 2.5 ml p/d HOSF (8 weeks) with a washout period (6 weeks) in-between. The one-year trial included a post-treatment period (30 weeks) and afterwards was a one-year follow-up period. MAIN OUTCOME MEASURES Changes in numbers of surgical procedures for improved disease outcome, total/anatomical scores (staging system) for papillomatosis prevention/viral inhibition, and lymphocyte/cytokine counts for immune responses between baselines and each treatment/end of trial were measured. FINDINGS After each treatment all the children were in remission (no surgical procedures); after the trial two had recurrence (surgical procedures in post-treatment period); after the follow-up period three had recurrence (several surgical procedures) and five recovered (four had no surgical procedures). Effects of CLA (and HOSF to a lesser extent) were restricted to mildly/moderately aggressive papillomatosis. Children with low total scores (seven/less) and reduced infections (three/less laryngeal sub-sites) recovered after the trial. No harmful effects were observed. The number of surgical procedures during the trial (n6/available records) was significantly lower [(p 0.03) (95% CI 1.1; 0)]. Changes in scores between baselines and CLA treatments (n8) were significantly lower: total scores [(p 0.02) (95% CI -30.00; 0.00)]; anatomical scores [(p 0.008) (95% CI -33.00: -2.00)]. Immune enhancement could not be demonstrated. CONCLUSIONS These preliminary case and group findings pave the way for further research on the therapeutic potential of adjuvant CLA in the treatment of HPV-induced LP.
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Affiliation(s)
- Louise Louw
- Department Otorhinolaryngology, Faculty of Health Sciences, University of the Free State, Box 339G42, Bloemfontein 9300, South Africa.
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28
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Mitocans, Mitochondria-Targeting Anticancer Drugs. ACTA ACUST UNITED AC 2012. [DOI: 10.1201/b12308-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Mammas IN, Sourvinos G, Giamarelou P, Michael C, Spandidos DA. Human papillomavirus in the oral cavity of children and mode of delivery: a retrospective study. Int J STD AIDS 2012; 23:185-8. [DOI: 10.1258/ijsa.2009.009483] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Our study aimed to examine the relationship between the presence of human papillomavirus (HPV) in the oral cavity of children and their mode of delivery. We investigated the presence of HPV infection in oral biopsies from 190 children (mean age: 7 years, range: 2–14 years) using the polymerase chain reaction (PCR) technique. Sixteen of 190 children (8.4%) were HPV-positive, with no significant difference between those delivered vaginally and by Caesarean section (C-section). The majority of the HPV-positive children were infected with type 16, whereas in the younger age group HPV type 11 was detected more frequently in children delivered by normal vaginal delivery (NVD) than by C-section. Our findings demonstrate the presence of HPV in the oral cavity of children delivered by both C-section as well as NVD. Further research on the possible modes of transmission of oral HPV infection will enable us to understand the natural history of HPV infection in childhood.
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Affiliation(s)
- I N Mammas
- Department of Clinical Virology, School of Medicine, University of Crete, Rethymnon, Crete
| | - G Sourvinos
- Department of Clinical Virology, School of Medicine, University of Crete, Rethymnon, Crete
| | - P Giamarelou
- Department of Pathology, ‘Aglaia Kyriakou’ Children's Hospital, Athens, Greece
| | - C Michael
- Department of Pathology, ‘Aglaia Kyriakou’ Children's Hospital, Athens, Greece
| | - D A Spandidos
- Department of Clinical Virology, School of Medicine, University of Crete, Rethymnon, Crete
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Rohlena J, Dong LF, Ralph SJ, Neuzil J. Anticancer drugs targeting the mitochondrial electron transport chain. Antioxid Redox Signal 2011; 15:2951-74. [PMID: 21777145 DOI: 10.1089/ars.2011.3990] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
SIGNIFICANCE Mitochondria are emerging as highly intriguing organelles showing promise but that are yet to be fully exploited as targets for anticancer drugs. RECENT ADVANCES A group of compounds that induce mitochondrial destabilization, thereby affecting the physiology of cancer cells, has been defined and termed 'mitocans.' Based on their mode of action of targeting in and around mitochondria, we have placed these agents into several groups including hexokinase inhibitors, compounds targeting Bcl-2 family proteins, thiol redox inhibitors, VDAC/ANT targeting drugs, electron transport chain-targeting drugs, lipophilic cations targeting the inner membrane, agents affecting the tricarboxylic acid cycle, drugs targeting mtDNA, and agents targeting other presently unknown sites. CRITICAL ISSUES Mitocans have a potential to prove highly efficient in suppressing various malignant diseases in a selective manner. They include compounds that are currently in clinical trial and offer substantial promise to become clinically applied drugs. Here we update and redefine the individual classes of mitocans, providing examples of the various members of these groups with a particular focus on agents targeting the electron transport chain, and indicate their potential application in clinical practice. FUTURE DIRECTIONS Even though reactive oxygen species induction is important for the anticancer activity of many mitocans, the precise sequence of events preceding and following this pivotal event are not yet fully clarified, and warrant further investigation. This is imperative for effective deployment of these compounds in the clinic.
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Affiliation(s)
- Jakub Rohlena
- Institute of Biotechnology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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Uloza V, Liutkevičius V, Pangonytė D, Šaferis V, Lesauskaitė V. Expression of matrix metalloproteinases (MMP-2 and MMP-9) in recurrent respiratory papillomas and laryngeal carcinoma: clinical and morphological parallels. Eur Arch Otorhinolaryngol 2011; 268:871-8. [DOI: 10.1007/s00405-011-1494-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Accepted: 01/10/2011] [Indexed: 11/28/2022]
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Villa LL. HPV prophylactic vaccination: The first years and what to expect from now. Cancer Lett 2010; 305:106-12. [PMID: 21190794 DOI: 10.1016/j.canlet.2010.12.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Revised: 12/02/2010] [Accepted: 12/03/2010] [Indexed: 01/11/2023]
Abstract
New prophylactic HPV vaccines have the power to prevent many HPV infections, thus reducing the burden of HPV-associated diseases. Two vaccines composed of HPV L1 proteins self assembled into virus-like particles (VLPs) have been developed: one containing VLPS of HPV types 6, 11, 16 and 18, while the other vaccine is composed of HPV 16 and 18 VLPs. Large phase II and III clinical trials to assess prophylactic efficacy have been conducted in which both HPV infection endpoints and disease endpoints were evaluated, particularly high-grade cervical intraepithelial neoplasia--CIN2 or CIN3--as well as vulvar and vaginal intraepithelial neoplasias--VIN or VaIN--and genital warts for the quadrivalent vaccine. Very high efficacy rates were observed in different populations that included young women between 16 and 26 years of age, and older (up to 55). More recently, the quadrivalent vaccine has been shown to be efficacious in men to prevent genital and anal infection and disease caused by the types included in the vaccine. Based on demonstrated clinical efficacy and favorable safety profile, HPV prophylactic vaccine are being introduced worldwide aiming the reduction of the morbidity and mortality of tumors caused by HPV. From 2006 when first approved in the USA, hundreds of countries have licensed the HPV vaccines, a significant proportion of which are offering the vaccine to young women in national immunization programs supported by the government. The ultimate goal is to implement worldwide cervical cancer control programs to include HPV vaccination and screening with cytology and HPV DNA testing, particularly in less-developed countries where it is most needed.
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Affiliation(s)
- Luisa Lina Villa
- Virology Group, Ludwig Institute for Cancer Research, Hospital Alemão Oswaldo Cruz, Rua João Julião 245, São Paulo, SP, Brazil
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De Clercq E. Yet another ten stories on antiviral drug discovery (part D): paradigms, paradoxes, and paraductions. Med Res Rev 2010; 30:667-707. [PMID: 19626594 DOI: 10.1002/med.20173] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review article presents the fourth part (part D) in the series of stories on antiviral drug discovery. The stories told in part D focus on: (i) the cyclotriazadisulfonamide compounds; (ii) the {5-[(4-bromophenylmethyl]-2-phenyl-5H-imidazo[4,5-c]pyridine} compounds; (iii) (1H,3H-thiazolo[3,4-a]benzimidazole) derivatives; (iv) T-705 (6-fluoro-3-hydroxy-2-pyrazinecarboxamide) and (v) its structurally closely related analogue pyrazine 2-carboxamide (pyrazinamide); (vi) new strategies for the treatment of hemorrhagic fever virus infections, including, as the most imminent, (vii) dengue fever, (viii) the veterinary use of acyclic nucleoside phosphonates; (ix) the potential (off-label) use of cidofovir in the treatment of papillomatosis, particularly RRP (recurrent respiratory papillomatosis); and (x) finally, the prophylactic use of tenofovir to prevent HIV infections.
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Affiliation(s)
- Erik De Clercq
- Rega Institute for Medical Research, K.U. Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium.
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Novel human papilloma virus (HPV) genotypes in children with recurrent respiratory papillomatosis. Eur J Pediatr 2010; 169:1017-21. [PMID: 20213305 DOI: 10.1007/s00431-010-1174-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Accepted: 02/15/2010] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Recurrent respiratory papillomatosis (RRP) is characterized by the presence of benign virally induced tumors of the larynx and respiratory epithelium that may obstruct the airway and tend to recur frequently. RRP is caused by the human papilloma virus (HPV), most frequently by HPV types 6 and 11. In this study, we present four cases of children with RRP in whom HPVs other than HPV-6 or HPV-11 were found. MATERIAL AND METHODS In all four cases, HPV typing was performed by polymerase chain reaction (PCR) followed by restriction digestion (RFLP) in biopsy samples collected during surgery. RESULTS In the first case, simultaneous HPV infection with types 13 and 39 was detected, while in the second case HPV-40 and HPV-56 were found. In cases 3 and 4, the biopsy samples were positive for unidentified 'low-risk' HPVs. CONCLUSIONS The presence of novel HPV genotypes in children with RRP emphasizes the need for further investigation of the implication of these genotypes in the disease.
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Nowaczewska K, Wójtowicz P, Kukwa A, Ratajczak J, Tulibacki M. [Respiratory papillomatosis--new methods of treatment]. Otolaryngol Pol 2010; 64:31-6. [PMID: 20476590 DOI: 10.1016/s0030-6657(10)70032-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Respiratory papillomatosis is caused by HPV. The most common location in head and neck is larynx, palatine tonsils and arches of palate, uvula and mucosa oral and nasal cavity. The disease is benign but recurrent. The aim of this study was to estimate new methods of treatment respiratory papillomatosis based on intralesional injection of cidofovir into sites where papillomas had just been excised. METHODS The purpose of the study were 59 patients treating in Otolaryngology Clinic Stomatology Department Medical University of Warsaw. The treatment was based on surgical excision of papilloma and after it intralesional injection of cidofovir in after 4-5 weeks. RESULTS We observed the patients during 28 months. 41 patients had 4 times intralesional injection of cidofovir. 18 patients had increased number of injection of ciodofovir because of recurrent papilloma. Rest of this group of the patients clinical studies showed remission disease. CONCLUSION Surgery with intralesional cidofovir injection in the place after removal of papilloma is very effective methods. We observed that this treatment caused long lasting remission of papilloma recurrence.
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Affiliation(s)
- Katarzyna Nowaczewska
- Klinika Otolaryngologii, Instytutu Stomatologii, Warszawskiego Uniwersytetu Medycznego
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Vivar OI, Saunier EF, Leitman DC, Firestone GL, Bjeldanes LF. Selective activation of estrogen receptor-beta target genes by 3,3'-diindolylmethane. Endocrinology 2010; 151:1662-7. [PMID: 20160136 PMCID: PMC2850231 DOI: 10.1210/en.2009-1028] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
3,3'-Diindolylmethane (DIM) is a natural compound found in cruciferous vegetables that has antiproliferative and estrogenic activity. However, it is not clear whether the estrogenic effects are mediated through estrogen receptor (ER)alpha, ERbeta, or both ER subtypes. We investigated whether DIM has ER subtype selectivity on gene transcription. DIM stimulated ERbeta but not ERalpha activation of an estrogen response element upstream of the luciferase reporter gene. DIM also selectively activated multiple endogenous genes through ERbeta. DIM did not bind to ERbeta, indicating that it activates genes by a ligand-independent mechanism. DIM causes ERbeta to bind regulatory elements and recruit the steroid receptor coactivator (SRC)-2 coactivator, which leads to the activation of ER target genes. Silencing of SRC-2 inhibited the activation of ER target genes, demonstrating that SRC-2 is required for transcriptional activation by DIM. Our results demonstrate that DIM is a new class of ERbeta-selective compounds, because it does not bind to ERbeta, but instead it selectively recruits ERbeta and coactivators to target genes.
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Affiliation(s)
- Omar I Vivar
- Department of Nutritional Science and Toxicology, University of California, Berkeley, Berkeley, California 94720-3104, USA
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Lei W, Wen W, Su Z, Chai L, Feng X, Liu K, Jiang A, Zhu X. Comparison of intravenous general anaesthesia vs endotracheal intubation in the surgical management of juvenile onset recurrent respiratory papillomatosis. Acta Otolaryngol 2010; 130:281-5. [PMID: 19685355 DOI: 10.3109/00016480903051643] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSIONS Both intravenous general anaesthesia (IVGA) and general anaesthesia with endotracheal intubation (GA with ET) are applicable for the procedure of juvenile onset recurrent respiratory papillomatosis (JO-RRP). GA with ET was found to be better for JO-RRP patients with dyspnoea, as it provided better stabilization of the vital signs with fewer postoperative complications. OBJECTIVES To evaluate the safety and efficacy of two different anaesthetic techniques in the removal of JO-RRP. METHODS A total of 52 JO-RRP patients with mild dyspnoea were included in the study. Each case underwent two procedures, one by IVGA and the other by GA with ET. A total of 104 procedures were performed. The effectiveness and safety of the two anaesthetic techniques were pairwise compared. RESULTS There were no significant differences in anaesthetic recovery time, operative time or postoperative voice quality between the two anaesthetic groups. However, significant differences in heart rate, oxygen saturation and carbon dioxide saturation were observed. Some patients who underwent IVGA developed apnoea (28.8%) and laryngeal spasm (19.2%). These complications were not observed in the GA with ET group.
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Affiliation(s)
- Wenbin Lei
- National Key Disciplines of Otorhinolaryngology, Otorhinolaryngology Hospital, Otorhinolaryngology Institute, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, PR China
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Abstract
Redox dysregulation originating from metabolic alterations and dependence on mitogenic and survival signaling through reactive oxygen species represents a specific vulnerability of malignant cells that can be selectively targeted by redox chemotherapeutics. This review will present an update on drug discovery, target identification, and mechanisms of action of experimental redox chemotherapeutics with a focus on pro- and antioxidant redox modulators now in advanced phases of preclinal and clinical development. Recent research indicates that numerous oncogenes and tumor suppressor genes exert their functions in part through redox mechanisms amenable to pharmacological intervention by redox chemotherapeutics. The pleiotropic action of many redox chemotherapeutics that involves simultaneous modulation of multiple redox sensitive targets can overcome cancer cell drug resistance originating from redundancy of oncogenic signaling and rapid mutation.Moreover, some redox chemotherapeutics may function according to the concept of synthetic lethality (i.e., drug cytotoxicity is confined to cancer cells that display loss of function mutations in tumor suppressor genes or upregulation of oncogene expression). The impressive number of ongoing clinical trials that examine therapeutic performance of novel redox drugs in cancer patients demonstrates that redox chemotherapy has made the crucial transition from bench to bedside.
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Affiliation(s)
- Georg T Wondrak
- Department of Pharmacology and Toxicology, College of Pharmacy, Arizona Cancer Center, University of Arizona, Tucson, Arizona, USA
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Insinga RP, Dasbach EJ, Elbasha EH. Epidemiologic natural history and clinical management of Human Papillomavirus (HPV) Disease: a critical and systematic review of the literature in the development of an HPV dynamic transmission model. BMC Infect Dis 2009; 9:119. [PMID: 19640281 PMCID: PMC2728100 DOI: 10.1186/1471-2334-9-119] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Accepted: 07/29/2009] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Natural history models of human papillomavirus (HPV) infection and disease have been used in a number of policy evaluations of technologies to prevent and screen for HPV disease (e.g., cervical cancer, anogenital warts), sometimes with wide variation in values for epidemiologic and clinical inputs. The objectives of this study are to: (1) Provide an updated critical and systematic review of the evidence base to support epidemiologic and clinical modeling of key HPV disease-related parameters in the context of an HPV multi-type disease transmission model which we have applied within a U.S. population context; (2) Identify areas where additional studies are particularly needed. METHODS Consistent with our and other prior HPV natural history models, the literature review was confined to cervical disease and genital warts. Between October 2005 and January 2006, data were gathered from the published English language medical literature through a search of the PubMed database and references were examined from prior HPV natural history models and review papers. Study design and data quality from individual studies were compared and analyses meeting pre-defined criteria were selected. RESULTS Published data meeting review eligibility criteria were most plentiful for natural history parameters relating to the progression and regression of cervical intraepithelial neoplasia (CIN) without HPV typing, and data concerning the natural history of HPV disease due to specific HPV types were often lacking. Epidemiologic evidence to support age-dependency in the risk of progression and regression of HPV disease was found to be weak, and an alternative hypothesis concerning the time-dependence of transition rates is explored. No data were found on the duration of immunity following HPV infection. In the area of clinical management, data were observed to be lacking on the proportion of clinically manifest anogenital warts that are treated and the proportion of cervical cancer cases that become symptomatic by stage. CONCLUSION Knowledge of the natural history of HPV disease has been considerably enhanced over the past two decades, through the publication of an increasing number of relevant studies. However, considerable opportunity remains for advancing our understanding of HPV natural history and the quality of associated models, particularly with respect to examining HPV age- and type-specific outcomes, and acquired immunity following infection.
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Affiliation(s)
- Ralph P Insinga
- Department of Health Economic Statistics, Merck Research Laboratories, North Wales, PA, USA
| | - Erik J Dasbach
- Department of Health Economic Statistics, Merck Research Laboratories, North Wales, PA, USA
| | - Elamin H Elbasha
- Department of Health Economic Statistics, Merck Research Laboratories, North Wales, PA, USA
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Gallagher TQ, Derkay CS. Pharmacotherapy of recurrent respiratory papillomatosis: an expert opinion. Expert Opin Pharmacother 2009; 10:645-55. [PMID: 19284366 DOI: 10.1517/14656560902793530] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Recurrent respiratory papillomatosis is caused by the human papillomavirus types (HPV) 6 and 11. It affects both children and adults. In a small number of cases, the disease can be very aggressive causing significant morbidity and possibly death. Surgical therapy is the primary treatment but in patients with aggressive disease, adjunctive therapy is initiated. The majority of these adjuncts center on immunomodulation, disruption of molecular signaling cascades or interruption of viral replication to help decrease the severity of the disease. Recently, a preventative vaccine has become available but data on its effectiveness will be at least a decade away. In the mean time, researchers are examining other vaccination strategies in the fight against HPV disease. OBJECTIVE We will review the following pharmacotherapies used in the adjunct treatment of RRP: interferon, acyclovir, ribivirin, cidofovir, COX-2 inhibitors, retinoids, anti-reflux medications, zinc, indole-3-carbinol, therapeutic/preventative vaccines. METHODS This is a review paper. Utilizing Medline and Pubmed from 1966 to present, the key words as well as the above listed adjunct treatments were searched for relevant papers. CONCLUSION The evidence supporting each of these adjuncts varies with a majority having only case reports or cases-series to support their use. However, there is hope on the horizon with regard to the HPV vaccine and its potential to prevent future transmission of this disease.
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3,3'-Diindolylmethane induces a G(1) arrest in human prostate cancer cells irrespective of androgen receptor and p53 status. Biochem Pharmacol 2009; 78:469-76. [PMID: 19433067 DOI: 10.1016/j.bcp.2009.05.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 04/25/2009] [Accepted: 05/04/2009] [Indexed: 11/20/2022]
Abstract
3,3'-Diindolylmethane (DIM) is a potential chemopreventive phytochemical derived from Brassica vegetables. In this study we characterized the effect of DIM on cell cycle regulation in both androgen-dependent LNCaP and androgen receptor negative p53 mutant DU145 human prostate cancer cells. DIM had an anti-proliferative effect on both LNCaP and DU145 cells, as it significantly inhibited [3H]-thymidine incorporation. FACS analysis revealed a DIM-mediated G(1) cell cycle arrest. DIM strongly inhibited the expression of cdk2 and cdk4 protein and increased the expression of the cell cycle inhibitor p27(Kip1) protein in LNCaP and DU145 cells. Promoter deletion studies with p27(Kip1) reporter gene constructs showed that this DIM-mediated increase in p27(Kip1) was dependent on the Sp1 transcription factor. Moreover, using a dominant negative inhibitor of p38 MAPK, we showed that the induction of p27(Kip1) and subsequent G(1) arrest by DIM involve activation of the p38 MAPK pathway in the DU145 cells. Taken together, our results indicate that DIM is able to stop the cell cycle progression of human prostate cancer cells regardless of their androgen-dependence and p53 status, by differentially modulating cell cycle regulatory pathways. The Sp1 and p38 MAPK pathways mediate the DIM cell cycle regulatory effect in DU145 cells.
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Bielecki I, Mniszek J, Cofała M. Intralesional injection of cidofovir for recurrent respiratory papillomatosis in children. Int J Pediatr Otorhinolaryngol 2009; 73:681-4. [PMID: 19193450 DOI: 10.1016/j.ijporl.2009.01.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2008] [Revised: 12/28/2008] [Accepted: 01/02/2009] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Papillomatosis of the larynx appears as the result of an infection by the human papilloma virus (HPV). In children, the disease produces benign lesions, which grow rapidly and show a marked tendency to recur once removed. The course of the disease is unpredictable. Some patients can achieve spontaneous remission; however, in other cases the disease progresses violently and requires multiple operations. There is currently no effective therapy for recurrent respiratory papillomatosis (RRP). The basic goal of treatment is to preserve the patency of air passages while simultaneously preserving the phonatory and anatomical functioning of the larynx. Over the last 10 years, the possibility of a pharmacological treatment has been continually explored: in particular, the administration of locally passed cidofovir (first reported in a 1999 study by Pransky) to the larynx with papillomas is under current scrutiny. GOAL OF STUDY The goal of the following study is to estimate the effectiveness of locally administered cidofovir for treatment of papillomas of the larynx in children. PATIENTS AND METHODS From 2005 to 2007, 10 patients (seven boys and three girls) between the ages of 1-18 years were treated. Operations were executed using microlaryngoscopy (Karl-Storz endoscopy) with general anesthesia. Cidofovir was passed intralesionally with concentration 5-10mg/ml in quantity from 1 to 5mg/kg in a 4-week interval. RESULTS Seven of the 10 patients achieved total remission 6 months after the completion of treatment, scoring 0 points on Derkay's scale. These patients underwent therapy with cidofovir from 6 to 13 months. Three months after the completion of treatment, three children suffered a recurrence of papillomas. Two of them are estimated at 3 points on Derkay's scale, while the third is estimated at 5 points. CONCLUSIONS The results of the study indicate that intralesional injections of cidofovir can be an effective method of treatment for recurrent respiratory papillomatosis in children.
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Affiliation(s)
- Ireneusz Bielecki
- Department of Otolaryngology, Upper Silesian Center for Child Health, Medical University of Silesia, Katowice, Poland.
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Martins RHG, Dias NH, Gregório EA, Marques MA, Silva MGD, Candeias JMG. Laryngeal papillomatosis: morphological study by light and electron microscopy of the HPV-6. Braz J Otorhinolaryngol 2009; 74:539-43. [PMID: 18852979 PMCID: PMC9442133 DOI: 10.1016/s1808-8694(15)30600-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2007] [Accepted: 06/10/2007] [Indexed: 01/01/2023] Open
Abstract
Laryngeal papillomatosis is the most frequent benign neoplasia in children. It is caused by HPV 6 and 11. The lesions are exophytic and highly recurrent, compromising the airway mucosa, mainly the larynx. Study design - clinical prospective. Aims to show morphologic alterations of the epithelium (light and electron microscopy) in the HPV-6 lesions. Methods specimens of laryngeal lesions obtained during surgery of four children (1 male, 3 female) were submitted to HPV typing (PCR), light microscopy and electron microscopy. Results in all specimens, HPV type 6 was found. Epithelial projections were found by electron microscopy with superficial cells in desquamation. Light microscopy showed exophytic projections of the keratinized stratified squamous epithelium overlying a fibrovascular core. Koilocytes (vacuolated cells), suggesting the viral infection by HPV, were identified. No alterations were seen in the basement membrane and corion. Ultraestrutural analysis showed vacuolated cells with clear cytoplasmic inclusions, intercellular injuries and widening intercellular spaces. Conclusions morphologic alterations of the epithelium in the HPV-6 lesions are superficial, and additional studies including the others HPV types are needed to show the more aggressive and extensive aspect of the disease.
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Human papilloma virus (HPV) infection in children and adolescents. Eur J Pediatr 2009; 168:267-73. [PMID: 19050916 DOI: 10.1007/s00431-008-0882-z] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Revised: 09/23/2008] [Accepted: 11/13/2008] [Indexed: 01/18/2023]
Abstract
Human papilloma viruses (HPV) are common pathogens associated with a wide range of cutaneous and mucosal infections in childhood. Different HPV types can cause common warts, genital warts, low-grade as well as high-grade squamous intraepithelial lesions. Anogenital warts represent an issue with legal and clinical implications and evaluation of children for the possibility of sexual abuse should be considered in all cases. Recurrent respiratory papillomatosis has also been associated with HPV infection in a variety of studies. The recently introduced HPV vaccination is expected to prevent HPV-related cervical cancer in adulthood; however, HPV infection will continue to affect children.
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Diaz ML. Human Papilloma Virus – Prevention and Treatment. Obstet Gynecol Clin North Am 2008; 35:199-217, vii-viii. [DOI: 10.1016/j.ogc.2008.03.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Xue L, Pestka JJ, Li M, Firestone GL, Bjeldanes LF. 3,3'-Diindolylmethane stimulates murine immune function in vitro and in vivo. J Nutr Biochem 2008; 19:336-44. [PMID: 17707631 PMCID: PMC2387240 DOI: 10.1016/j.jnutbio.2007.05.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2007] [Revised: 04/23/2007] [Accepted: 05/03/2007] [Indexed: 12/25/2022]
Abstract
3,3'-Diindolylmethane (DIM), a major condensation product of indole-3-carbinol, exhibits chemopreventive properties in animal models of cancer. Recent studies have shown that DIM stimulates interferon-gamma (IFN-gamma) production and potentiates the IFN-gamma signaling pathway in human breast cancer cells via a mechanism that includes increased expression of the IFN-gamma receptor. The goal of this study was to test the hypothesis that DIM modulates the murine immune function. Specifically, the effects of DIM were evaluated in a panel of murine immune function tests that included splenocyte proliferation, reactive oxygen species (ROS) generation, cytokine production and resistance to viral infection. DIM was found to induce proliferation of splenocytes as well as augment mitogen- and interleukin (IL)-2-induced splenocyte proliferation. DIM also stimulated the production of ROS by murine peritoneal macrophage cultures. Oral administration of DIM, but not intraperitoneal injection, induced elevation of serum cytokines in mice, including IL-6, granulocyte colony-stimulating factor (G-CSF), IL-12 and IFN-gamma. Finally, in a model of enteric virus infection, oral DIM administration to mice enhanced both clearance of reovirus from the GI tract and the subsequent mucosal IgA response. Thus, DIM is a potent stimulator of immune function. This property might contribute to the cancer inhibitory effects of this indole.
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Affiliation(s)
- Ling Xue
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA 94720-3104, USA
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3104, USA
| | - James J. Pestka
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, 48824, USA
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, 48824-1224, USA
- Center for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA
| | - Maoxiang Li
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, 48824, USA
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, 48824-1224, USA
- Center for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA
| | - Gary L Firestone
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3104, USA
| | - Leonard F. Bjeldanes
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA 94720-3104, USA
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3104, USA
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Gélinas JF, Manoukian J, Côté A. Lung involvement in juvenile onset recurrent respiratory papillomatosis: a systematic review of the literature. Int J Pediatr Otorhinolaryngol 2008; 72:433-52. [PMID: 18281102 DOI: 10.1016/j.ijporl.2007.12.003] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2007] [Accepted: 12/20/2007] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Determine the exact incidence of pulmonary involvement in recurrent respiratory papillomatosis (RRP); explore available treatments and their effectiveness; determine the characteristics of cases that progress to lung cancer. DATA SOURCES MEDLINE, EMBASE, and the Cochrane Library databases between 1966 and 2007; reference lists of retrieved publication. STUDY SELECTION Studies investigating recurrent respiratory papillomatosis with lung involvement. Age limited to 20 years of age to qualify for the diagnosis of juvenile-onset RRP. DATA EXTRACTION Data pertaining to study design, population demographics, risk factors, site of involvement, investigation including the determination of the human papillomavirus type, treatment, and outcomes including the development of cancer. DATA SYNTHESIS No randomized control trials were retrieved. Hundred and one studies met our inclusion criteria (23 cohorts, 4 case series, 72 case reports, 2 open trials) with 161 cases of lung involvement identified. From the cohort studies we could estimate the incidence of lung involvement in RRP at 3.3%. The incidence of cancer in cases with lung involvement was 16%. We could not draw conclusions regarding treatment effectiveness in lung involvement, as that was not evaluated except in case studies. It would nevertheless appear that Interferon is not effective and the use of intravenous Cidofovir needs to be better evaluated. CONCLUSION Well-designed, hypothesis-driven randomized control trials and prospective cohort studies are warranted to improve our understanding of the mechanisms underlying the development of lung involvement in RRP, the risks associated with different HPV types, the efficacy of potential therapeutic options as well as the risk of progression to cancer.
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Affiliation(s)
- Jean-François Gélinas
- Respiratory Medicine Division and Otolaryngology Division, The Montreal Children's Hospital, McGill University Health Centre, 2300 Tupper, D-380, Montreal, Canada H3H 1P3
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Abstract
BACKGROUND Recurrent laryngeal papillomatosis is caused by the human papilloma virus and characterized by multiple exophytic lesions of the vocal tract; it is a benign disease, but one that tends to recur after removal of growths. Due to the nature of the disease, alternative treatment strategies have focused on antiviral injection at lesion sites that eliminate repeated surgical procedures. The purpose of this study was to evaluate the efficacy of cidofovir injection following initial papilloma excision with a microdebrider. METHODS Cidofovir injections (at a concentration of 7.5 mg/mL) were conducted in 5 patients (1 child; 4 adults). The injection number per patient varied from 2 mL to 6 mL. Repeated cidofovir injections were indicated only if recurrent or newly grown lesions were found in any of 3-week follow-up visits. RESULTS Short-term complete remission was observed with different duration, from 11 to 21 weeks, following initial 2 to 3 cidofovir injections. All patients relapsed eventually, and their recurrent lesions were not successfully eradicated by repeated cidofovir injection. One patient's prognosis was complicated by scarring of both vocal cords. CONCLUSION Surgical excision combined with cidofovir injection failed to prevent relapsing laryngeal papillomatosis. Once lesions recurred, repeated cidofovir injections alone were not able to achieve complete remission, although these procedures might be helpful in lessening the severity of the clinical course. Further studies in determining the dosage, duration of injection, and more long-term follow-up are required to clarify the efficacy of cidofovir for the treatment of recurrent laryngeal papillomatosis.
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Affiliation(s)
- Zheng-Ping Shi
- Department of Otolaryngology-Head and Neck Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, R.O.C
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3,3'-diindolylmethane reduces levels of HIF-1alpha and HIF-1 activity in hypoxic cultured human cancer cells. Biochem Pharmacol 2008; 75:1858-67. [PMID: 18329003 DOI: 10.1016/j.bcp.2008.01.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2007] [Revised: 01/25/2008] [Accepted: 01/25/2008] [Indexed: 12/30/2022]
Abstract
3,3'-diindolylmethane (DIM) is a chemopreventive and chemotherapeutic phytochemical derived from the metabolism of indoles found at high concentrations in cruciferous vegetables. We have previously shown that DIM exhibits anti-angiogenic properties in cultured vascular endothelial cells and in Matrigel plug assays in rodents. In the present study, we demonstrate that DIM reduces the level of hypoxia-inducible factor (HIF)-1alpha in hypoxic tumor cell lines, as well as HIF-1 transcriptional activity as measured by a reporter assay. Moreover, DIM inhibited the expression of HIF-1-responsive endogenous genes, resulting in the reduced expression of key hypoxia responsive factors, VEGF, furin, enolase-1, glucose transporter-1 and phosphofructokinase. DIM reduced the level of HIF-1alpha in hypoxic cells by increasing the rate of the prolylhydroxylase- and proteasome-mediated degradation of HIF-1alpha, and by decreasing the rate of HIF-1alpha transcription. Using enzyme kinetics studies, we established that DIM interacts with the oligomycin-binding site on the F0 transmembrane component of mitochondrial F1F0-ATPase. The contributions of the resulting increases in levels of ROS and O2 in hypoxic cells to the inhibitory effects of DIM on HIF-1alpha expression are discussed. These studies are the first to show that DIM can decrease the accumulation and activity of the key angiogenesis regulatory factor, HIF-1alpha, in hypoxic tumor cells.
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