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Bridier A, Dubois-Brissonnet F, Boubetra A, Thomas V, Briandet R. The biofilm architecture of sixty opportunistic pathogens deciphered using a high throughput CLSM method. J Microbiol Methods 2010; 82:64-70. [PMID: 20433880 DOI: 10.1016/j.mimet.2010.04.006] [Citation(s) in RCA: 160] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 04/19/2010] [Accepted: 04/19/2010] [Indexed: 11/25/2022]
Abstract
This study proposes a high throughput method based on Confocal Laser Scanning Microscopy (CLSM) combined with the use of 96-wells microtiter plates compatible with high resolution imaging for the study of biofilm formation and structure. As an illustration, the three-dimensional structures of biofilms formed by 60 opportunistic pathogens were thus observed and quantified. The results revealed the diversity of biofilm architectures. Specific spatial arrangement such as the mushroom-like structures already described for Pseudomonas aeruginosa was observed. Other features, such as hollow voids in microcolonies of Salmonella enterica strain Agona, were identified for the first time. The combined use of microplates and confocal imaging proved to be a good alternative to the other high throughput methods commonly used as it enables the direct, insitu, qualitative and quantitative characterization of biofilm architecture. This high content method should lead to a clearer understanding of the structure-function relationships implicated in biofilms traits.
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77
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Boivin A, Currie K, Fervers B, Gracia J, James M, Marshall C, Sakala C, Sanger S, Strid J, Thomas V, van der Weijden T, Grol R, Burgers J. Patient and public involvement in clinical guidelines: international experiences and future perspectives. Qual Saf Health Care 2010; 19:e22. [PMID: 20427302 DOI: 10.1136/qshc.2009.034835] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Clinical practice guidelines (CPG) are important tools for improving patient care. Patient and public involvement is recognised as an essential component of CPG development and implementation. The Guideline International Network Patient and Public Involvement Working Group (G-I-N PUBLIC) aims to support the development, implementation and evaluation of guideline-oriented patient and public involvement programmes (PPIPs). OBJECTIVE To develop an international practice and research agenda on patient and public involvement in CPG. METHOD 56 CPG developers, researchers, and patient/public representatives from 14 different countries, were consulted in an international workshop. Recommendations were validated with G-I-N PUBLIC steering committee members. RESULTS Many CPG organisations have set up PPIPs that use a range of participation, consultation and communication methods. Current PPIPs aim to improve the quality and responsiveness of CPGs to public expectations and needs, or to foster individual healthcare decisions. Some organisations use structured involvement methods, including providing training for patient and public representatives. A number of financial, organisational and sociopolitical barriers limit patient and public involvement. The paucity of process and impact evaluations limits our current understanding of the conditions under which patient and public involvement is most likely to be effective. CONCLUSION Greater international collaboration and research are needed to strengthen existing knowledge, development and evaluation of patient and public involvement in CPG.
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78
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Rashid RM, Thomas V. Androgenic pattern presentation of scarring and inflammatory alopecia. J Eur Acad Dermatol Venereol 2010; 24:979-80. [PMID: 20059630 DOI: 10.1111/j.1468-3083.2009.03557.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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79
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Abstract
Mental imagery and visualisation are techniques that can help cancer patients manage their responses to the illness and help them mobilise inner psychological resources.
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80
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Bonnin N, Thomas V, Gabrillargues J, Bacin F. Fibrinolyse intra-artérielle in situ chez une patiente monophtalme atteinte d’occlusion d’artère centrale de rétine. J Fr Ophtalmol 2009; 32:415-9. [DOI: 10.1016/j.jfo.2009.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2008] [Accepted: 04/23/2009] [Indexed: 11/16/2022]
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81
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Mahurkar S, Bhaskar S, Reddy DN, Rao GV, Singh SP, Thomas V, Chandak GR. The G191R variant in the PRSS2 gene does not play a role in protection against tropical calcific pancreatitis. Gut 2009; 58:881-2. [PMID: 19433599 DOI: 10.1136/gut.2008.170753] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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82
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Roussi M, Farguette F, Thomas V, Bacin F. 449 Remarquable réponse à l’injection intravitréenne de Bevacizumab sur un néovaisseau compliquant un ostéome choroïdien. J Fr Ophtalmol 2009. [DOI: 10.1016/s0181-5512(09)73573-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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83
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Grandpierre S, Desandes E, Chevalier O, Thomas V, Meneroux B, Netter F, Karcher G, Marie PY. A019 Prédiction des accidents vasculaires cérébraux par la TEP-TDM vasculaire au 18F-FDG. Arch Cardiovasc Dis 2009. [DOI: 10.1016/s1875-2136(09)72152-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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84
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Thomas V, Dave Y. Structure and development of follicles of Nerium indicum Mill. (Apocynaceae). ACTA ACUST UNITED AC 2008. [DOI: 10.1002/fedr.19911020512] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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85
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Bonnin N, Thomas V, Gabrillargues J, Bacin F. 300 Cas de fibrinolyse intra-artérielle in situ chez une patiente monophtalme atteinte d’occlusion de l’artère centrale de rétine. J Fr Ophtalmol 2008. [DOI: 10.1016/s0181-5512(08)70897-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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86
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Rousseau E, Albertini E, Thomas V, Bacin F, Dalens H. 562 Occlusion de l’artère centrale de la rétine au décours d’une embolisation pour malformation artério-veineuse faciale chez un enfant de 8 ans : à propos d’un cas. J Fr Ophtalmol 2008. [DOI: 10.1016/s0181-5512(08)71160-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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87
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Pauchard E, Patte M, Thomas V, Bruslea D, Bacin F. 294 Injections intra-vitréennes de bevacizumab dans le traitement des formes complexes exsudatives de la dégénérescence maculaire liée à l’âge : étude prospective. J Fr Ophtalmol 2008. [DOI: 10.1016/s0181-5512(08)70891-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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88
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Kareem H, Sebastian S, Jose T, Thomas V. Perforated appendicitis presenting with ileo-caecal ulceration and mechanical intestinal obstruction. TROPICAL GASTROENTEROLOGY : OFFICIAL JOURNAL OF THE DIGESTIVE DISEASES FOUNDATION 2008; 29:105-106. [PMID: 18972773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A 30-year-old lady presented with a 6-month history of recurrent partial intestinal obstruction associated with intermittent fever, anorexia and weight loss. Barium meal follow-through and colonoscopic evaluation suggested ulceration of the ileum and caecum with small bowel obstruction. Histology of the lesions showed marked acute and chronic inflammation consistent with ulceration and granulation tissue. Abdominal CT revealed circumferential thickening of the ascending colon, caecum and terminal ileum with extraluminal air pockets. Surgical exploration revealed a large conglomerate mass involving the terminal ileum, caecum and ascending colon. Histopathology of the resected specimen revealed perforated appendix with nonspecific ulceration of the surrounding bowel. She recovered completely after surgery and did not suffer from gastrointestinal symptoms in the 14 months of follow-up.
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89
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Novitzky N, Thomas V, du Toit C. Prevention of graft vs. host disease with alemtuzumab ‘in the bag’ decreases early toxicity of stem cell transplantation and in multiple myeloma is associated with improved long-term outcome. Cytotherapy 2008; 10:45-53. [DOI: 10.1080/14653240701732771] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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90
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Loret JF, Jousset M, Robert S, Saucedo G, Ribas F, Thomas V, Greub G. Amoebae-resisting bacteria in drinking water: risk assessment and management. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2008; 58:571-7. [PMID: 18725723 DOI: 10.2166/wst.2008.423] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Free-living amoebae have been detected in a large number of man-made water systems, including drinking water distribution systems. Some of these amoebae can host amoebae-resisting bacteria, and thus act potentially as reservoirs and vehicles for a number of pathogens. The objectives of this study were to characterize the amoebae and amoebae-resisting bacteria present in different raw waters used for drinking water production, and to assess the efficiency of different treatments applied for drinking water production in removing or inactivating these amoebae. The preliminary results of this study confirm the presence of amoebae and amoebae-resisting bacteria in raw waters used for drinking water production. Due to their capacity to encyst, most of these amoebae are extremely resistant to disinfection processes. In these conditions, preventing the dissemination of these micro-organisms through drinking water will mainly require their physical removal by clarification and filtration processes. The particular hazard that amoebae-resisting bacteria represent in drinking water production should be taken into account in any risk assessment conducted in the framework of a water safety plan, and control strategies based on physical removal rather than disinfection should be adopted where necessary.
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91
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Thomas V, McDonnell G. Relationship between mycobacteria and amoebae: ecological and epidemiological concerns. Lett Appl Microbiol 2007; 45:349-57. [PMID: 17897376 DOI: 10.1111/j.1472-765x.2007.02206.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Since the discovery that Legionella pneumophila can survive and grow within free-living amoebae, there has been an increasing number of microbial species shown to have similar relationships. These include many bacterial species, fungi, other protozoa (e.g. Cryptosporidium) and viruses. Among bacteria, mycobacteria are of particular importance because of their role in human and animal infections. This review will consider the progress made in understanding the relationships between mycobacteria and amoebae, and their consequences in terms of ecology and epidemiology.
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92
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Thomas V, Yallapu MM, Sreedhar B, Bajpai SK. A versatile strategy to fabricate hydrogel–silver nanocomposites and investigation of their antimicrobial activity. J Colloid Interface Sci 2007; 315:389-95. [PMID: 17707388 DOI: 10.1016/j.jcis.2007.06.068] [Citation(s) in RCA: 232] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2007] [Revised: 06/22/2007] [Accepted: 06/25/2007] [Indexed: 11/17/2022]
Abstract
In this study, hydrogel-silver nanocomposites have been synthesized by a unique methodology, which involves formation of silver nanoparticles within swollen poly (acrylamide-co-acrylic acid) hydrogels. The formation of silver nanoparticles was confirmed by transmission electron microscopy (TEM) and surface plasmon resonance (SPR) which was obtained at 406 nm. The TEM of hydrogel-silver nanocomposites showed almost uniform distribution of nanoparticles throughout the gel networks. Most of the particles, as revealed from the particle-size distribution curve, were 24-30 nm in size. The X-ray diffraction pattern also confirmed the face centered cubic (fcc) structure of silver nanoparticles. The nanocomposites demonstrated excellent antibacterial effects on Escherichia coli (E. coli). The antibacterial activity depended on size of the nanocomposites, amount of silver nanoparticles, and amount of monomer acid present within the hydrogel-silver nanocomposites. It was also found that immersion of plain hydrogel in 20 mg/30 ml AgNO(3) solution yielded nanocomparticle-hydrogel composites with optimum bactericidal activity.
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93
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Thomas V, Stephen Y, Justy J, Hema S, Thankam V. Semen infection and ICSI outcome. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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94
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Thomas V, Stephen Y, Justy J, Hema S, Thankam V. Laser assisted hatching and ICSI outcome. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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95
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Thomas V. I've had this problem for ages, perhaps you can help.. Arch Dis Child 2007; 92:559-60. [PMID: 17515628 PMCID: PMC2066143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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96
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Thomas V. And what do you do? Arch Dis Child 2007; 92:559. [PMID: 17515629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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97
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Thomas V, Sillaire-Houtmann I, Albertini E, Pauchard E, Patte M, Bacin F. 080 Valeur pronostique de l’OCT post-opératoire après décollement de rétine rhegmatogène avec soulèvement maculaire traité par indentation sclérale. J Fr Ophtalmol 2007. [DOI: 10.1016/s0181-5512(07)79892-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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98
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Pauchard E, Patte M, Thomas V, Albertini E, Bacin F. 423 Survenue spontanée d’un trou maculaire associé à une membrane épirétinienne dans le cadre d’une dégénérescence maculaire liée à l’âge de type exsudative. J Fr Ophtalmol 2007. [DOI: 10.1016/s0181-5512(07)80236-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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99
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Simjee S, de Jong A, McConville M, Bywater R, Chaton-Schaffner M, Deroover E, Klein U, Shryock T, Simmons R, Smets K, Stewart F, Thomas V, Valle M, Marion H. O27 European Antimicrobial Susceptibility Surveillance in Animals (EASSA): Results (2002/2003) for enteric bacteria from healthy cattle, pigs and chickens from 8 countries. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70026-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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100
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Sakly W, Thomas V, Quash G, El Alaoui S. A role for tissue transglutaminase in alpha-gliadin peptide cytotoxicity. Clin Exp Immunol 2007; 146:550-8. [PMID: 17100777 PMCID: PMC1810403 DOI: 10.1111/j.1365-2249.2006.03236.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In coeliac disease, gliadin peptides p56-88, p57-68 and p31-49 have been demonstrated to be involved in the pathogenic damage of the small intestine via their immunogenicity or toxicity to epithelial cells. To try to understand the mechanism of their toxicity, we investigated the effect of synthetic peptides (p31-49, p56-88, p57-68, p69-82) and of their deamidated analogues on Caco2 and FHs 74 Int cell toxicity and tissue tranglutaminase activity. Apoptosis, necrosis and cell viability were assessed by flow cytometry, and peptide deamidation was determined indirectly by measuring its capacity to inhibit tTG activity. The results showed that p56-88 and p57-68 reduced cell growth and concomitantly inhibited tTG activity in both cell types. This effect was abolished when Caco2 cells were treated with antibodies to tTG. Deamidated peptide p57-68 (E(65)) lost practically all of its inhibitory effect on cell growth and on tTG activity. Cellular toxicity was also observed with p31-49, which was not a substrate for tTG. p69-82 was not cytotoxic but became so when glutamine 72 was substituted by glutamic acid. These findings provide evidence for the existence of three types of toxicity among gliadin peptides: (i) peptides that are intrinsically toxic and are not substrates of tTG; (ii) peptides that are non-toxic but become so when they act as substrates of tTG; and (iii) peptides that are non-toxic and are not substrates of tTG but become so when deamidated. A mechanism other than that involving tTG could be responsible for the deamidation of glutamine residues of gliadin in the intestinal tract.
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