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Danielou M, Sarter H, Pariente B, Fumery M, Ley D, Mamona C, Barthoulot M, Charpentier C, Siproudhis L, Savoye G, Gower-Rousseau C, Andre JM, Antonietti M, Aouakli A, Armand A, Aroichane I, Assi F, Aubet JP, Auxenfants E, Ayafi-Ramelot F, Azzouzi K, Bankovski D, Barbry B, Bardoux N, Baron P, Baudet A, Bazin B, Bebahani A, Becqwort JP, Benet V, Benali H, Benguigui C, Ben Soussan E, Bental A, Berkelmans I, Bernet J, Bernou K, Bernou-Dron C, Bertot P, Bertiaux-Vandaële N, Bertrand V, Billoud E, Biron N, Bismuth B, Bleuet M, Blondel F, Blondin V, Bohon P, Boniface E, Bonnière P, Bonvarlet E, Bonvarlet P, Boruchowicz A, Bostvironnois R, Boualit M, Bouche B, Boudaillez C, Bourgeaux C, Bourgeois M, Bourguet A, Bourienne A, Branche J, Bray G, Brazier F, Breban P, Bridenne M, Brihier H, Brung-Lefebvre V, Bulois P, Burgiere P, Butel J, Canva JY, Canva-Delcambre V, Capron JP, Cardot F, Carpentier P, Cartier E, Cassar JF, Cassagnou M, Castex JF, Catala P, Cattan S, Catteau S, Caujolle B, Cayron G, Chandelier C, Chantre M, Charles J, Charneau T, Chavance-Thelu M, Chirita D, Choteau A, Claerbout JF, Clergue PY, Coevoet H, Cohen G, Collet R, Colombel JF, Coopman S, Corvisart J, Cortot A, Couttenier F, Crinquette JF, Crombe V, Dadamessi I, Dapvril V, Davion T, Dautreme S, Debas J, Degrave N, Dehont F, Delatre C, Delcenserie R, Delette O, Delgrange T, Delhoustal L, Delmotte JS, Demmane S, Deregnaucourt G, Descombes P, Desechalliers JP, Desmet P, Desreumaux P, Desseaux G, Desurmont P, Devienne A, Devouge E, Devred M, Devroux A, Dewailly A, Dharancy S, Di Fiore A, Djeddi D, Djedir R, Dreher-Duwat ML, Dubois R, Dubuque C, Ducatillon P, Duclay J, Ducrocq B, Ducrot F, Ducrotte P, Dufilho A, Duhamel C, Dujardin D, Dumant-Forest C, Dupas JL, Dupont F, Duranton Y, Duriez A, El Achkar K, El Farisi M, Elie C, Elie-Legrand MC, Elkhaki A, Eoche M, Evrard D, Evrard JP, Fatome A, Filoche B, Finet L, Flahaut M, Flamme C, Foissey D, Fournier P, Foutrein-Comes MC, Foutrein P, Fremond D, Frere T, Fumery M, Gallet P, Gamblin C, Ganga S, Gerard R, Geslin G, Gheyssens Y, Ghossini N, Ghrib S, Gilbert T, Gillet B, Godard D, Godard P, Godchaux JM, Godchaux R, Goegebeur G, Goria O, Gottrand F, Gower P, Grandmaison B, Groux M, Guedon C, Guillard JF, Guillem L, Guillemot F, Guimberd D, Haddouche B, Hakim S, Hanon D, Hautefeuille V, Heckestweiller P, Hecquet G, Hedde JP, Hellal H, Henneresse PE, Heyman B, Heraud M, Herve S, Hochain P, Houssin-Bailly L, Houcke P, Huguenin B, Iobagiu S, Ivanovic A, Iwanicki-Caron I, Janicki E, Jarry M, Jeu J, Joly JP, Jonas C, Katherin F, Kerleveo A, Khachfe A, Kiriakos A, Kiriakos J, Klein O, Kohut M, Kornhauser R, Koutsomanis D, Laberenne JE, Laffineur G, Lagarde M, Lalanne A, Lannoy P, Lapchin J, Laprand M, Laude D, Leblanc R, Lecieux P, Leclerc N, Le Couteulx C, Ledent J, Lefebvre J, Lefiliatre P, Legrand C, Le Grix A, Lelong P, Leluyer B, Lenaerts C, Lepileur L, Leplat A, Lepoutre-Dujardin E, Leroi H, Leroy MY, Lesage JP, Lesage X, Lesage J, Lescanne-Darchis I, Lescut J, Lescut D, Leurent B, Levy P, Lhermie M, Lion A, Lisambert B, Loire F, Louf S, Louvet A, Luciani M, Lucidarme D, Lugand J, Macaigne O, Maetz D, Maillard D, Mancheron H, Manolache O, Marks-Brunel AB, Marti R, Martin F, Martin G, Marzloff E, Mathurin P, Mauillon J, Maunoury V, Maupas JL, Mesnard B, Metayer P, Methari L, Meurisse B, Meurisse F, Michaud L, Mirmaran X, Modaine P, Monthe A, Morel L, Mortier PE, Moulin E, Mouterde O, Mudry J, Nachury M, N’Guyen Khac E, Notteghem B, Ollevier V, Ostyn A, Ouraghi A, Ouvry D, Paillot B, Panien-Claudot N, Paoletti C, Papazian A, Parent B, Pariente B, Paris JC, Patrier P, Paupart L, Pauwels B, Pauwels M, Petit R, Piat M, Piotte S, Plane C, Plouvier B, Pollet E, Pommelet P, Pop D, Pordes C, Pouchain G, Prades P, Prevost A, Prevost JC, Quesnel B, Queuniet AM, Quinton JF, Rabache A, Rabelle P, Raclot G, Ratajczyk S, Rault D, Razemon V, Reix N, Revillon M, Richez C, Robinson P, Rodriguez J, Roger J, Roux JM, Rudelli A, Saber A, Savoye G, Schlosseberg P, Segrestin M, Seguy D, Serin M, Seryer A, Sevenet F, Shekh N, Silvie J, Simon V, Spyckerelle C, Talbodec N, Techy A, Thelu JL, Thevenin A, Thiebault H, Thomas J, Thorel JM, Tielman G, Tode M, Toisin J, Tonnel J, Touchais JY, Touze Y, Tranvouez JL, Triplet C, Turck D, Uhlen S, Vaillant E, Valmage C, Vanco D, Vandamme H, Vanderbecq E, Vander Eecken E, Vandermolen P, Vandevenne P, Vandeville L, Vandewalle A, Vandewalle C, Vaneslander P, Vanhoove JP, Vanrenterghem A, Varlet P, Vasies I, Verbiese G, Vernier-Massouille G, Vermelle P, Verne C, Vezilier-Cocq P, Vigneron B, Vincendet M, Viot J, Voiment YM, Wacrenier A, Waeghemaecker L, Wallez JY, Wantiez M, Wartel F, Weber J, Willocquet JL, Wizla N, Wolschies E, Zalar A, Zaouri B, Zellweger A, Ziade C. Natural History of Perianal Fistulising Lesions in Patients With Elderly-onset Crohn's Disease: A Population-based Study. J Crohns Colitis 2020; 14:501-507. [PMID: 31637413 DOI: 10.1093/ecco-jcc/jjz173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Most studies of elderly-onset Crohn's disease [CD; diagnosed in patients aged 60 or over] have described a mild course. However, data on the natural history of perianal fistulising CD [pfCD] in this population are scarce. In a population-based cohort study, we described the prevalence, natural history, and treatment of pfCD in patients with elderly-onset CD vs patients with paediatric-onset CD. METHOD All patients diagnosed with CD at or after the age of 60 between 1988 and 2006, were included [n = 372]. Logistic regression, Cox models, and a nested case-control method were used to identify factors associated with pfCD. RESULTS A total of 34 elderly patients [9% of the 372] had pfCD at diagnosis. After a median follow-up of 6 years (interquartile range [IQR]: 3; 10), 59 patients [16%] had pfCD; the same prevalence [16%] was observed in paediatric-onset patients. At last follow-up, anal incontinence was more frequent in elderly patients with pfCD than in elderly patients without pfCD [22% vs 4%, respectively; p < 10-4]. Rectal CD at diagnosis was associated with pfCD: hazard ratio (95% confidence interval [CI] = 2.8 [1.6-5.0]). Although 37% of the patients received immunosuppressants and 17% received anti-tumour necrosis factor agents, 24% [14 out of 59] had a definitive stoma at last follow-up. CONCLUSION During the first 6 years of disease, the prevalence of pfCD was similar in elderly and paediatric patients. Rectal involvement was associated with the appearance of pfCD in elderly-onset patients. Around a quarter of patients with elderly-onset CD will have a stoma. Our results suggest that treatment with biologics should be evaluated in these patients.
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Affiliation(s)
- Marie Danielou
- Gastroenterology Unit, EPIMAD Registry, University of Rouen and Rouen University Hospital, Rouen, France
| | - Hélène Sarter
- Public Health, Epidemiology and Economic Health Unit, EPIMAD Registry, Maison Régionale de la Recherche Clinique, University of Lille and Lille University Hospital, Lille, France.,LIRIC UMR 995, Team 5, INSERM and University of Lille, Lille, France
| | - Benjamin Pariente
- Gastroenterology Unit, EPIMAD Registry, Hôpital Huriez, Lille University Hospital, Lille, France
| | - Mathurin Fumery
- Gastroenterology Unit, EPIMAD Registry, and PeriTox, UMR I-01, University of Amiens and Amiens University Hospital, Amiens, France
| | - Delphine Ley
- Division of Gastroenterology, Hepatology and Nutrition, Department of Paediatrics, Jeanne de Flandre Children's Hospital and University of Lille, Lille, France
| | - Christel Mamona
- Public Health, Epidemiology and Economic Health Unit, EPIMAD Registry, Maison Régionale de la Recherche Clinique, University of Lille and Lille University Hospital, Lille, France
| | - Maël Barthoulot
- Public Health, Epidemiology and Economic Health Unit, EPIMAD Registry, Maison Régionale de la Recherche Clinique, University of Lille and Lille University Hospital, Lille, France
| | - Cloé Charpentier
- Gastroenterology Unit, EPIMAD Registry, University of Rouen and Rouen University Hospital, Rouen, France
| | | | - Guillaume Savoye
- Gastroenterology Unit, EPIMAD Registry, University of Rouen and Rouen University Hospital, Rouen, France
| | - Corinne Gower-Rousseau
- Public Health, Epidemiology and Economic Health Unit, EPIMAD Registry, Maison Régionale de la Recherche Clinique, University of Lille and Lille University Hospital, Lille, France.,LIRIC UMR 995, Team 5, INSERM and University of Lille, Lille, France
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Aparicio T, Ducreux M, Faroux R, Barbier E, Manfredi S, Lecomte T, Etienne PL, Bedenne L, Bennouna J, Phelip JM, François E, Michel P, Legoux JL, Gasmi M, Breysacher G, Rougier P, De Gramont A, Lepage C, Bouché O, Seitz JF, Adenis A, Alessio A, Aouakli A, Azzedine A, Bedjaoui A, Bidault A, Blanchi A, Botton A, Cadier-Lagnes A, Fatisse A, Gagnaire A, Gilbert A, Gueye A, Hollebecque A, Lemaire A, Mahamat A, Marre A, Patenotte A, Rotenberg A, Roussel A, Thirot-Bidault A, Votte A, Weber A, Zaanan A, Dupont-Gossart A, Villing A, Queuniet A, Coudert B, Denis B, Garcia B, Lafforgue B, Landi B, Leduc B, Linot B, Paillot B, Rhein B, Winkfield B, Barberis C, Becht C, Belletier C, Berger C, Bineau C, Borel C, Brezault C, Buffet C, Cornila C, Couffon C, De La Fouchardière C, Giraud C, Lecaille C, Lepere C, Lobry C, Locher C, Lombard-Bohas C, Paoletti C, Platini C, Rebischung C, Sarda C, Vilain C, Briac-Levaché C, Auby D, Baudet-Klepping D, Bechade D, Besson D, Cleau D, Festin D, Gargot D, Genet D, Goldfain D, Luet D, Malka D, Peré-Vergé D, Pillon D, Sevin-Robiche D, Smith D, Soubrane D, Tougeron D, Zylberait D, Carola E, Cuillerier E, Dorval Danquechin E, Echinard E, Janssen E, Maillard E, Mitry E, Norguet-Monnereau E, Suc E, Terrebonne E, Zrihen E, Pariente E, Almaric F, Audemar F, Bonnetain F, Desseigne F, Dewaele F, Di Fiore F, Ghiringhelli F, Husseini F, Khemissa F, Kikolski F, Morvan F, Petit-Laurent F, Riot F, Subtil F, Zerouala-Boussaha F, Caroli-Bosc F, Boilleau-Jolimoy G, Bordes G, Cavaglione G, Coulanjon G, Deplanque G, Gatineau-Saillant G, Goujon G, Medinger G, Roquin G, Brixi-Benmansour H, Castanie H, Lacroix H, Maechel H, Perrier H, Salloum H, Senellart H, Baumgaertner I, Cumin I, Graber I, Trouilloud I, Boutin J, Butel J, Charneau J, Cretin J, Dauba J, Deguiral J, Egreteau J, Ezenfis J, Forestier J, Goineau J, Lacourt J, Lafon J, Martin J, Meunier J, Moreau J, Provencal J, Taieb J, Thaury J, Tuaillon J, Vergniol J, Villand J, Vincent J, Volet J, Bachet J, Barbare J, Souquet J, Grangé J, Dor J, Paitel J, Jouve J, Raoul J, Cheula J, Gornet J, Sabate J, Vantelon J, Vaillant J, Aucouturier J, Barbieux J, Herr J, Lafargue J, Lagasse J, Latrive J, Plachot J, Ramain J, Robin J, Spano J, Douillard J, Beerblock K, Bouhier-Leporrier K, Slimane Fawzi K, Cany L, Chone L, Dahan L, Gasnault L, Rob L, Stefani L, Wander L, Baconnier M, Ben Abdelghani M, Benchalal M, Blasquez M, Carreiro M, Charbit M, Combe M, Duluc M, Fayolle M, Gignoux M, Giovannini M, Glikmanas M, Mabro M, Mignot M, Mornet M, Mousseau M, Mozer M, Pauwels M, Pelletier M, Porneuf M, Ramdani M, Schnee M, Tissot M, Zawadi M, Clavero-Fabri M, Gouttebel M, Kaminsky M, Galais M, Abdelli N, Barrière N, Bouaria N, Bouarioua N, Delas N, Gérardin N, Hess-Laurens N, Stremsdoerfer N, Berthelet O, Boulat O, Capitain O, Favre O, Amoyal P, Bergerault P, Burtin P, Cassan P, Chatrenet P, Chiappa P, Claudé P, Couzigou P, Feydy P, Follana P, Geoffroy P, Godeau P, Hammel P, Laplaige P, Lehair P, Martin P, Novello P, Pantioni P, Pienkowski P, Pouderoux P, Prost P, Ruszniewski P, Souillac P, Texereau P, Thévenet P, Haineaux P, Benoit R, Coriat R, Lamy R, Mackiewicz R, Beorchia S, Chaussade S, Hiret S, Jacquot S, Lavau Denes S, Montembault S, Nahon S, Nasca S, Nguyen S, Oddou-Lagraniere S, Pesque-Penaud S, Fratte S, Chatellier T, Mansourbakht T, Morin T, Walter T, Boige V, Bourgeois V, Derias V, Guérin-Meyer V, Hautefeuille V, Jestin Le Tallec V, Lorgis V, Quentin V, Sebbagh V, Veuillez V, Adhoute X, Coulaud X, Becouarn Y, Coscas Y, Courouble Y, Le Bricquir Y, Molin Y, Rinaldi Y, Lam Y, Ladhib Z. Overweight is associated to a better prognosis in metastatic colorectal cancer: A pooled analysis of FFCD trials. Eur J Cancer 2018; 98:1-9. [DOI: 10.1016/j.ejca.2018.03.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/26/2018] [Accepted: 03/28/2018] [Indexed: 02/07/2023]
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Ghione S, Sarter H, Fumery M, Armengol-Debeir L, Savoye G, Ley D, Spyckerelle C, Pariente B, Peyrin-Biroulet L, Turck D, Gower-Rousseau C, Andre JM, Antonietti M, Aouakli A, Armand A, Aroichane I, Assi F, Aubet JP, Auxenfants E, Ayafi-Ramelot F, Bankovski D, Barbry B, Bardoux N, Baron P, Baudet A, Bazin B, Bebahani A, Becqwort JP, Benet V, Benali H, Benguigui C, Soussan BE, Bental A, Berkelmans I, Bernet J, Bernou K, Bernou-Dron C, Bertot P, Bertiaux-Vandaële N, Bertrand V, Billoud E, Biron N, Bismuth B, Bleuet M, Blondel F, Blondin V, Bohon P, Boniface E, Bonnière P, Bonvarlet E, Bonvarlet P, Boruchowicz A, Bostvironnois R, Boualit M, Bouche B, Boudaillez C, Bourgeaux C, Bourgeois M, Bourguet A, Bourienne A, Branche J, Bray G, Brazier F, Breban P, Brihier H, Brung-Lefebvre V, Bulois P, Burgiere P, Butel J, Canva JY, Canva-Delcambre V, Capron JP, Cardot F, Carpentier P, Cartier E, Cassar JF, Cassagnou M, Castex JF, Catala P, Cattan S, Catteau S, Caujolle B, Cayron G, Chandelier C, Chantre M, Charles J, Charneau T, Chavance-Thelu M, Chirita D, Choteau A, Claerbout JF, Clergue PY, Coevoet H, Cohen G, Collet R, Colombel JF, Coopman S, Corvisart J, Cortot A, Couttenier F, Crinquette JF, Crombe V, Dadamessi I, Dapvril V, Davion T, Dautreme S, Debas J, Degrave N, Dehont F, Delatre C, Delcenserie R, Delette O, Delgrange T, Delhoustal L, Delmotte JS, Demmane S, Deregnaucourt G, Descombes P, Desechalliers JP, Desmet P, Desreumaux P, Desseaux G, Desurmont P, Devienne A, Devouge E, Devred M, Devroux A, Dewailly A, Dharancy S, Di Fiore A, Djeddi D, Djedir R, Dreher-Duwat ML, Dubois R, Dubuque C, Ducatillon P, Duclay J, Ducrocq B, Ducrot F, Ducrotte P, Dufilho A, Duhamel C, Dujardin D, Dumant-Forest C, Dupas JL, Dupont F, Duranton Y, Duriez A, El Achkar K, El Farisi M, Elie C, Elie-Legrand MC, Elkhaki A, Eoche M, Evrard D, Evrard JP, Fatome A, Filoche B, Finet L, Flahaut M, Flamme C, Foissey D, Fournier P, Foutrein-Comes MC, Foutrein P, Fremond D, Frere T, Fumery M, Gallet P, Gamblin C, Ganga-Zandzou PS, Gérard R, Geslin G, Gheyssens Y, Ghossini N, Ghrib S, Gilbert T, Gillet B, Godard D, Godard P, Godchaux JM, Godchaux R, Goegebeur G, Goria O, Gottrand F, Gower P, Grandmaison B, Groux M, Guedon C, Guillard JF, Guillem L, Guillemot F, Guimber D, Haddouche B, Hakim S, Hanon D, Hautefeuille V, Heckestweiller P, Hecquet G, Hedde JP, Hellal H, Henneresse PE, Heyman B, Heraud M, Herve S, Hochain P, Houssin-Bailly L, Houcke P, Huguenin B, Iobagiu S, Ivanovic A, Iwanicki-Caron I, Janicki E, Jarry M, Jeu J, Joly JP, Jonas C, Katherin F, Kerleveo A, Khachfe A, Kiriakos A, Kiriakos J, Klein O, Kohut M, Kornhauser R, Koutsomanis D, Laberenne JE, Laffineur G, Lagarde M, Lannoy P, Lapchin J, Lapprand M, Laude D, Leblanc R, Lecieux P, Leclerc N, Le Couteulx C, Ledent J, Lefebvre J, Lefiliatre P, Legrand C, Le Grix A, Lelong P, Leluyer B, Lenaerts C, Lepileur L, Leplat A, Lepoutre-Dujardin E, Leroi H, Leroy MY, Lesage JP, Lesage X, Lesage J, Lescanne-Darchis I, Lescut J, Lescut D, Leurent B, Levy P, Lhermie M, Lion A, Lisambert B, Loire F, Louf S, Louvet A, Luciani M, Lucidarme D, Lugand J, Macaigne O, Maetz D, Maillard D, Mancheron H, Manolache O, Marks-Brunel AB, Marti R, Martin F, Martin G, Marzloff E, Mathurin P, Mauillon J, Maunoury V, Maupas JL, Mesnard B, Metayer P, Methari L, Meurisse B, Meurisse F, Michaud L, Mirmaran X, Modaine P, Monthe A, Morel L, Mortier PE, Moulin E, Mouterde O, Mudry J, Nachury M, Khac NE, Notteghem B, Ollevier V, Ostyn A, Ouraghi A, Ouvry D, Paillot B, Panien-Claudot N, Paoletti C, Papazian A, Parent B, Pariente B, Paris JC, Patrier P, Paupart L, Pauwels B, Pauwels M, Petit R, Piat M, Piotte S, Plane C, Plouvier B, Pollet E, Pommelet P, Pop D, Pordes C, Pouchain G, Prades P, Prevost A, Prevost JC, Quesnel B, Queuniet AM, Quinton JF, Rabache A, Rabelle P, Raclot G, Ratajczyk S, Rault D, Razemon V, Reix N, Revillon M, Richez C, Robinson P, Rodriguez J, Roger J, Roux JM, Rudelli A, Saber A, Savoye G, Schlosseberg P, Segrestin M, Seguy D, Serin M, Seryer A, Sevenet F, Shekh N, Silvie J, Simon V, Spyckerelle C, Talbodec N, Techy A, Thelu JL, Thevenin A, Thiebault H, Thomas J, Thorel JM, Tielman G, Tode M, Toisin J, Tonnel J, Touchais JY, Touze Y, Tranvouez JL, Triplet C, Turck D, Uhlen S, Vaillant E, Valmage C, Vanco D, Vandamme H, Vanderbecq E, Eecken VE, Vandermolen P, Vandevenne P, Vandeville L, Vandewalle A, Vandewalle C, Vaneslander P, Vanhoove JP, Vanrenterghem A, Varlet P, Vasies I, Verbiese G, Vernier-Massouille G, Vermelle P, Verne C, Vezilier-Cocq P, Vigneron B, Vincendet M, Viot J, Voiment YM, Wacrenier A, Waeghemaecker L, Wallez JY, Wantiez M, Wartel F, Weber J, Willocquet JL, Wizla N, Wolschies E, Zalar A, Zaouri B, Zellweger A, Ziade C. Dramatic Increase in Incidence of Ulcerative Colitis and Crohn's Disease (1988-2011): A Population-Based Study of French Adolescents. Am J Gastroenterol 2018; 113:265-272. [PMID: 28809388 DOI: 10.1038/ajg.2017.228] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 06/08/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Few data are available to describe the changes in incidence of pediatric-onset inflammatory bowel disease (IBD). The aim of this study was to describe changes in incidence and phenotypic presentation of pediatric-onset IBD in northern France during a 24-year period. METHODS Pediatric-onset IBD (<17 years) was issued from a population-based IBD study in France between 1988 and 2011. Age groups and digestive location were defined according to the Paris classification. RESULTS 1,350 incident cases were recorded (8.3% of all IBD) including 990 Crohn's disease (CD), 326 ulcerative colitis (UC) and 34 IBD unclassified (IBDU). Median age at diagnosis was similar in CD (14.4 years (Q1=11.8-Q3=16.0)) and UC (14.0 years (11.0-16.0)) and did not change over time. There were significantly more males with CD (females/males=0.82) than UC (females/males=1.25) (P=0.0042). Median time between onset of symptoms and IBD diagnosis was consistently 3 months (1-6). Mean incidence was 4.4/105 for IBD overall (3.2 for CD, 1.1 for UC and 0.1 for IBDU). From 1988-1990 to 2009-2011, a dramatic increase in incidences of both CD and UC were observed in adolescents (10-16 years): for CD from 4.2 to 9.5/105 (+126%; P<0.001) and for UC, from 1.6 to 4.1/105 (+156%; P<0.001). No modification in age or location at diagnosis was observed in either CD or UC. CONCLUSIONS In this population-based study, CD and UC incidences increased dramatically in adolescents across a 24-year span, suggesting that one or more strong environmental factors may predispose this population to IBD.
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Affiliation(s)
- Silvia Ghione
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Lille University Jeanne de Flandre Children's Hospital and Faculty of Medicine, Lille, France
| | - Hélène Sarter
- Public Health, Epidemiology and Economic Health, Epimad registry, Regional house of clinical research, Lille Hospital and University, Lille, France.,Lille Inflammation Research International Center LIRIC-UMR 995 Inserm-"IBD and environmental factors: epidemiology and functional analyses", Lille University, Lille, France
| | - Mathurin Fumery
- Gastroenterology Unit, Epimad registry, Amiens Hospital and University, Amiens, France
| | - Laura Armengol-Debeir
- Gastroenterology Unit, Epimad registry, Rouen Hospital and University, Rouen, France
| | - Guillaume Savoye
- Gastroenterology Unit, Epimad registry, Rouen Hospital and University, Rouen, France
| | - Delphine Ley
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Lille University Jeanne de Flandre Children's Hospital and Faculty of Medicine, Lille, France.,Lille Inflammation Research International Center LIRIC-UMR 995 Inserm-"IBD and environmental factors: epidemiology and functional analyses", Lille University, Lille, France
| | - Claire Spyckerelle
- Department of Pediatrics, St Vincent de Paul Hospital and Lille Catholic University, Lille, France
| | - Benjamin Pariente
- Lille Inflammation Research International Center LIRIC-UMR 995 Inserm-"IBD and environmental factors: epidemiology and functional analyses", Lille University, Lille, France.,Gastroenterology Unit, Epimad registry, Lille Hospital and University, Lille, France
| | | | - Dominique Turck
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Lille University Jeanne de Flandre Children's Hospital and Faculty of Medicine, Lille, France.,Lille Inflammation Research International Center LIRIC-UMR 995 Inserm-"IBD and environmental factors: epidemiology and functional analyses", Lille University, Lille, France
| | - Corinne Gower-Rousseau
- Public Health, Epidemiology and Economic Health, Epimad registry, Regional house of clinical research, Lille Hospital and University, Lille, France.,Lille Inflammation Research International Center LIRIC-UMR 995 Inserm-"IBD and environmental factors: epidemiology and functional analyses", Lille University, Lille, France
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Duricova D, Leroyer A, Savoye G, Sarter H, Pariente B, Aoucheta D, Armengol-Debeir L, Ley D, Turck D, Peyrin-Biroulet L, Gower-Rousseau C, Fumery M, Antonietti M, Aouakli A, Armand A, Aroichane I, Assi F, Aubet JP, Auxenfants E, Ayafi-Ramelot F, Bankovski D, Barbry B, Bardoux N, Baron P, Baudet A, Bazin B, Bebahani A, Becqwort JP, Benet V, Benali H, Benguigui C, Ben Soussan E, Bental A, Berkelmans I, Bernet J, Bernou K, Bernou-Dron C, Bertot P, Bertiaux-Vandaële N, Bertrand V, Billoud E, Biron N, Bismuth B, Bleuet M, Blondel F, Blondin V, Bohon P, Boniface E, Bonnière P, Bonvarlet E, Bonvarlet P, Boruchowicz A, Bostvironnois R, Boualit M, Bouche B, Boudaillez C, Bourgeaux C, Bourgeois M, Bourguet A, Bourienne A, Branche J, Bray G, Brazier F, Breban P, Brihier H, Brung-Lefebvre V, Bulois P, Burgiere P, Butel J, Canva JY, Canva-Delcambre V, Capron JP, Cardot F, Carpentier P, Cartier E, Cassar JF, Cassagnou M, Castex JF, Catala P, Cattan S, Catteau S, Caujolle B, Cayron G, Chandelier C, Chantre M, Charles J, Charneau T, Chavance-Thelu M, Chirita D, Choteau A, Claerbout JF, Clergue PY, Coevoet H, Cohen G, Collet R, Colombel JF, Coopman S, Corvisart J, Cortot A, Couttenier F, Crinquette JF, Crombe V, Dadamessi I, Dapvril V, Davion T, Dautreme S, Debas J, Degrave N, Dehont F, Delatre C, Delcenserie R, Delette O, Delgrange T, Delhoustal L, Delmotte JS, Demmane S, Deregnaucourt G, Descombes P, Desechalliers JP, Desmet P, Desreumaux P, Desseaux G, Desurmont P, Devienne A, Devouge E, Devred M, Devroux A, Dewailly A, Dharancy S, Di Fiore A, Djeddi D, Djedir R, Dreher-Duwat ML, Dubois R, Dubuque C, Ducatillon P, Duclay J, Ducrocq B, Ducrot F, Ducrotté P, Dufilho A, Duhamel C, Dujardin D, Dumant-Forest C, Dupas JL, Dupont F, Duranton Y, Duriez A, El Achkar K, El Farisi M, Elie C, Elie-Legrand MC, Elkhaki A, Eoche M, Evrard D, Evrard JP, Fatome A, Filoche B, Finet L, Flahaut M, Flamme C, Foissey D, Fournier P, Foutrein-Comes MC, Foutrein P, Fremond D, Frere T, Fumery M, Gallet P, Gamblin C, Ganga-Zandzou S, Gerard R, Geslin G, Gheyssens Y, Ghossini N, Ghrib S, Gilbert T, Gillet B, Godard D, Godard P, Godchaux JM, Godchaux R, Goegebeur G, Goria O, Gottrand F, Gower P, Grandmaison B, Groux M, Guedon C, Guillard JF, Guillem L, Guillemot F, Guimber D, Haddouche B, Hakim S, Hanon D, Hautefeuille V, Heckestweiller P, Hecquet G, Hedde JP, Hellal H, Henneresse PE, Heyman B, Heraud M, Herve S, Hochain P, Houssin-Bailly L, Houcke P, Huguenin B, Iobagiu S, Ivanovic A, Iwanicki-Caron I, Janicki E, Jarry M, Jeu J, Joly JP, Jonas C, Katherin F, Kerleveo A, Khachfe A, Kiriakos A, Kiriakos J, Klein O, Kohut M, Kornhauser R, Koutsomanis D, Laberenne JE, Laffineur G, Lagarde M, Lannoy P, Lapchin J, Lapprand M, Laude D, Leblanc R, Lecieux P, Leclerc N, Le Couteulx C, Ledent J, Lefebvre J, Lefiliatre P, Legrand C, Le Grix A, Lelong P, Leluyer B, Lenaerts C, Lepileur L, Leplat A, Lepoutre-Dujardin E, Leroi H, Leroy MY, Lesage JP, Lesage X, Lesage J, Lescanne-Darchis I, Lescut J, Lescut D, Leurent B, Levy P, Lhermie M, Lion A, Lisambert B, Loire F, Louf S, Louvet A, Luciani M, Lucidarme D, Lugand J, Macaigne O, Maetz D, Maillard D, Mancheron H, Manolache O, Marks-Brunel AB, Marti R, Martin F, Martin G, Marzloff E, Mathurin P, Mauillon J, Maunoury V, Maupas JL, Mesnard B, Metayer P, Methari L, Meurisse B, Meurisse F, Michaud L, Mirmaran X, Modaine P, Monthe A, Morel L, Mortier PE, Moulin E, Mouterde O, Mudry J, Nachury M, N’Guyen Khac E, Notteghem B, Ollevier V, Ostyn A, Ouraghi A, Ouvry D, Paillot B, Panien-Claudot N, Paoletti C, Papazian A, Parent B, Pariente B, Paris JC, Patrier P, Paupart L, Pauwels B, Pauwels M, Petit R, Piat M, Piotte S, Plane C, Plouvier B, Pollet E, Pommelet P, Pop D, Pordes C, Pouchain G, Prades P, Prevost A, Prevost JC, Quesnel B, Queuniet AM, Quinton JF, Rabache A, Rabelle P, Raclot G, Ratajczyk S, Rault D, Razemon V, Reix N, Revillon M, Richez C, Robinson P, Rodriguez J, Roger J, Roux JM, Rudelli A, Saber A, Savoye G, Schlosseberg P, Segrestin M, Seguy D, Serin M, Seryer A, Sevenet F, Shekh N, Silvie J, Simon V, Spyckerelle C, Talbodec N, Techy A, Thelu JL, Thevenin A, Thiebault H, Thomas J, Thorel JM, Tielman G, Tode M, Toisin J, Tonnel J, Touchais JY, Touze Y, Tranvouez JL, Triplet C, Turck D, Uhlen S, Vaillant E, Valmage C, Vanco D, Vandamme H, Vanderbecq E, Vander Eecken E, Vandermolen P, Vandevenne P, Vandeville L, Vandewalle A, Vandewalle C, Vaneslander P, Vanhoove JP, Vanrenterghem A, Varlet P, Vasies I, Verbiese G, Vernier-Massouille G, Vermelle P, Verne C, Vezilier-Cocq P, Vigneron B, Vincendet M, Viot J, Voiment YM, Wacrenier A, Waeghemaecker L, Wallez JY, Wantiez M, Wartel F, Weber J, Willocquet JL, Wizla N, Wolschies E, Zalar A, Zaouri B, Zellweger A, Ziade C. Extra-intestinal Manifestations at Diagnosis in Paediatric- and Elderly-onset Ulcerative Colitis are Associated With a More Severe Disease Outcome: A Population-based Study. J Crohns Colitis 2017; 11:1326-1334. [PMID: 28981648 DOI: 10.1093/ecco-jcc/jjx092] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 07/05/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIMS Data on extra-intestinal manifestations [EIM] and their impact on the disease course of ulcerative colitis [UC] in population-based cohorts are scarce, particularly in paediatric- and elderly-onset UC patients. The aims of this population-based study were to assess: 1] the occurrence of EIM in paediatric- and elderly-onset UC; 2] the factors associated with EIM; and 3] their impact on long-term disease outcome. METHODS Paediatric-onset [< 17 years at diagnosis] and elderly-onset UC patients [> 60 years at diagnosis] from a French prospective population-based registry [EPIMAD] were included. Data on EIM and other clinical factors at diagnosis and at maximal follow-up were collected. RESULTS In all, 158 paediatric- and 470 elderly-onset patients were included [median age at diagnosis 14.5 and 68.8 years, median follow-up 11.2 and 6.2 years, respectively]. EIM occurred in 8.9% of childhood- and 3% of elderly-onset patients at diagnosis and in 16.7% and 2.2% of individuals during follow-up [p < 0.01], respectively. The most frequent EIM was joint involvement [15.8% of paediatric onset and 2.6% of elderly-onset]. Presence of EIM at diagnosis was associated with more severe disease course [need for immunosuppressants or biologic therapy or colectomy] in both paediatric- and elderly-onset UC (hazard ratio [HR] = 2.0, 95% confidence interval [CI]: 1.0-4.2; and HR = 2.8, 0.9-7.9, respectively). Extensive colitis was another independent risk factor in both age groups. CONCLUSIONS Elderly-onset UC patients had lower risk of EIM either at diagnosis or during follow-up than paediatric-onset individuals. EIM at diagnosis predicted more severe disease outcome, including need for immunosuppressive or biologic therapy or surgery, in both paediatric- and elderly-onset UC.
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Affiliation(s)
- Dana Duricova
- Public Health, Epidemiology and Economic Health, Registre EPIMAD, Lille University and Hospital, Lille, France
| | - Ariane Leroyer
- Public Health, Epidemiology and Economic Health, Registre EPIMAD, Lille University and Hospital, Lille, France
| | - Guillaume Savoye
- Gastroenterology Unit, EPIMAD Registry, Rouen University Hospital, Rouen, France
| | - Hélène Sarter
- Public Health, Epidemiology and Economic Health, Registre EPIMAD, Lille University and Hospital, Lille, France.,Lille Inflammation Research International Center LIRIC-UMR 995 Inserm Lille 2 University, Lille, France
| | - Benjamin Pariente
- Gastroenterology Unit, Hôpital Huriez, Lille University Hospital, Lille, France
| | - Djamila Aoucheta
- Associated Medical Director, Immunology, MSD France, Courbevoie cedex, France
| | | | - Delphine Ley
- Lille Inflammation Research International Center LIRIC-UMR 995 Inserm Lille 2 University, Lille, France.,Division of Gastroenterology, Hepatology and Nutrition, Lille University Jeanne de Flandre Children's Hospital, University of Lille, Lille, France
| | - Dominique Turck
- Lille Inflammation Research International Center LIRIC-UMR 995 Inserm Lille 2 University, Lille, France.,Division of Gastroenterology, Hepatology and Nutrition, Lille University Jeanne de Flandre Children's Hospital, University of Lille, Lille, France
| | | | - Corinne Gower-Rousseau
- Public Health, Epidemiology and Economic Health, Registre EPIMAD, Lille University and Hospital, Lille, France.,Lille Inflammation Research International Center LIRIC-UMR 995 Inserm Lille 2 University, Lille, France
| | - Mathurin Fumery
- Lille Inflammation Research International Center LIRIC-UMR 995 Inserm Lille 2 University, Lille, France.,Gastroenterology Unit, EPIMAD Registry, Amiens University Hospital, Amiens, France
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Waajen G, Pauwels M, Lürling M. Effects of combined flocculant - Lanthanum modified bentonite treatment on aquatic macroinvertebrate fauna. Water Res 2017; 122:183-193. [PMID: 28599163 DOI: 10.1016/j.watres.2017.05.075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 05/31/2017] [Accepted: 05/31/2017] [Indexed: 06/07/2023]
Abstract
A low dose flocculant (FeCl3), combined with lanthanum modified bentonite (LMB) as phosphate-binding agent, has been applied for eutrophication management in Lake De Kuil (The Netherlands). After the treatment, the state of the lake shifted from hypertrophic to mesotrophic. Although macroinvertebrate fauna is important for lake ecosystems, the knowledge of its response to this lake restoration method is fragmented and scarce. Because insight in the macroinvertebrate fauna response is important to assess future applications, pre and post application macroinvertebrate assemblages were identified in Lake De Kuil. The research was accompanied by a microcosm experiment in which the effects of LMB, FeCl3 and LMB + FeCl3 were studied on macroinvertebrate communities. Results show the reduction of macroinvertebrate numbers and taxa during the first month following the application. The number of Gastropoda was strikingly reduced one month after the application. One year after the application, the macroinvertebrate numbers and taxa exceeded the pre-application situation and Gastropoda and Oligochaeta prospered. The effects one month after the treatment are most likely due to the combination of physical impacts of the use of bentonite and chemical impacts of the use of FeCl3, while effects after one year are likely attributed to the shift in trophic state of the lake.
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Affiliation(s)
- G Waajen
- Water Authority Brabantse Delta, P.O. Box 5520, 4801 DZ, Breda, The Netherlands.
| | - M Pauwels
- BMD Advies Rijndelta Environmental Consultancy, Ebweg 18, 2991 LT, Barendrecht, The Netherlands
| | - M Lürling
- Aquatic Ecology & Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, The Netherlands; Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6700 AB, Wageningen, The Netherlands
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Roels F, Pauwels M, Cornelis A, Kerckaert I, Spek PVD, Goovaerts G, Versieck J, Goldfischer S. Peroxisomes (Microbodies) in Human Liver: Cytochemical and Quantitative Studies of 85 Biopsies. J Histochem Cytochem 2016; 31:235-237. [DOI: 10.1177/31.1a_suppl.6186727] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The number, intracellular distribution, and staining characteristics of human hepatocellular peroxisomes that had been made visible by cytochemical staining for catalase were evaluated in biopsies from 75 patients with hepatic, inflammatory, or malignant disease and ten normal individuals. Intensity of staining was found to be proportional to enzymatic activity by microspectrophotometry. Scanning transmission electron microscopy (STEM) image analysis demonstrated an inverse relationship between peroxisomal size and contrast. Peroxisomes were more abundant, and often concentrated in a perinuclear configuration in cholestatic and cirrhotic livers. Decreased peroxisomal staining was common in cholestasis, cirrhosis, hepatitis, and in almost all patients with malignancies, both with and without hepatic metastases.
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Affiliation(s)
- Frank Roels
- Menselijki Anatomie (F.R.; M.P.; A.C.; I.K.; P. v.d.S.), Gastroenterologie. Akademisch Ziekenhuis (G.G.), and Patologische Ontleedkunde (J.V.), Vrije Universiteit Brussel, 1090 Brussels, Belgium; Gastroenterologie (J.V.). Rijksuniversiteit Gent: and Department of Pathology and Liver Research Center (S.G.), Albert Einstein College of Medicine, Bronx, New York 10461 (OA 82-287P2)
| | - Marina Pauwels
- Menselijki Anatomie (F.R.; M.P.; A.C.; I.K.; P. v.d.S.), Gastroenterologie. Akademisch Ziekenhuis (G.G.), and Patologische Ontleedkunde (J.V.), Vrije Universiteit Brussel, 1090 Brussels, Belgium; Gastroenterologie (J.V.). Rijksuniversiteit Gent: and Department of Pathology and Liver Research Center (S.G.), Albert Einstein College of Medicine, Bronx, New York 10461 (OA 82-287P2)
| | - Alfons Cornelis
- Menselijki Anatomie (F.R.; M.P.; A.C.; I.K.; P. v.d.S.), Gastroenterologie. Akademisch Ziekenhuis (G.G.), and Patologische Ontleedkunde (J.V.), Vrije Universiteit Brussel, 1090 Brussels, Belgium; Gastroenterologie (J.V.). Rijksuniversiteit Gent: and Department of Pathology and Liver Research Center (S.G.), Albert Einstein College of Medicine, Bronx, New York 10461 (OA 82-287P2)
| | - Ingrid Kerckaert
- Menselijki Anatomie (F.R.; M.P.; A.C.; I.K.; P. v.d.S.), Gastroenterologie. Akademisch Ziekenhuis (G.G.), and Patologische Ontleedkunde (J.V.), Vrije Universiteit Brussel, 1090 Brussels, Belgium; Gastroenterologie (J.V.). Rijksuniversiteit Gent: and Department of Pathology and Liver Research Center (S.G.), Albert Einstein College of Medicine, Bronx, New York 10461 (OA 82-287P2)
| | - Peter Van Der Spek
- Menselijki Anatomie (F.R.; M.P.; A.C.; I.K.; P. v.d.S.), Gastroenterologie. Akademisch Ziekenhuis (G.G.), and Patologische Ontleedkunde (J.V.), Vrije Universiteit Brussel, 1090 Brussels, Belgium; Gastroenterologie (J.V.). Rijksuniversiteit Gent: and Department of Pathology and Liver Research Center (S.G.), Albert Einstein College of Medicine, Bronx, New York 10461 (OA 82-287P2)
| | - Gerda Goovaerts
- Menselijki Anatomie (F.R.; M.P.; A.C.; I.K.; P. v.d.S.), Gastroenterologie. Akademisch Ziekenhuis (G.G.), and Patologische Ontleedkunde (J.V.), Vrije Universiteit Brussel, 1090 Brussels, Belgium; Gastroenterologie (J.V.). Rijksuniversiteit Gent: and Department of Pathology and Liver Research Center (S.G.), Albert Einstein College of Medicine, Bronx, New York 10461 (OA 82-287P2)
| | - Jacques Versieck
- Menselijki Anatomie (F.R.; M.P.; A.C.; I.K.; P. v.d.S.), Gastroenterologie. Akademisch Ziekenhuis (G.G.), and Patologische Ontleedkunde (J.V.), Vrije Universiteit Brussel, 1090 Brussels, Belgium; Gastroenterologie (J.V.). Rijksuniversiteit Gent: and Department of Pathology and Liver Research Center (S.G.), Albert Einstein College of Medicine, Bronx, New York 10461 (OA 82-287P2)
| | - Sidney Goldfischer
- Menselijki Anatomie (F.R.; M.P.; A.C.; I.K.; P. v.d.S.), Gastroenterologie. Akademisch Ziekenhuis (G.G.), and Patologische Ontleedkunde (J.V.), Vrije Universiteit Brussel, 1090 Brussels, Belgium; Gastroenterologie (J.V.). Rijksuniversiteit Gent: and Department of Pathology and Liver Research Center (S.G.), Albert Einstein College of Medicine, Bronx, New York 10461 (OA 82-287P2)
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Teughels W, Kinder Haake S, Sliepen I, Pauwels M, Van Eldere J, Cassiman JJ, Quirynen M. Bacteria Interfere with A. actinomycetemcomitans Colonization. J Dent Res 2016; 86:611-7. [PMID: 17586706 DOI: 10.1177/154405910708600706] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
It is known that beneficial bacteria can suppress the emergence of pathogenic bacteria, particularly in the gastrointestinal tract. This study examined the potential for a similar suppression of Aggregatibacter (formerly Actinobacillus) actinomycetemcomitans colonization of epithelial cells, due to its potential relevance in periodontal diseases. Seven presumed beneficial bacteria were examined for their ability to interfere, exclude, or displace A. actinomycetemcomitans from epithelial cells in vitro. Streptococcus sanguinis, Streptococcus mitis, and Streptococcus salivarius showed prominent inhibitory effects on either A. actinomycetemcomitans recovery or colonization. These results confirmed the hypothesis that bacterial interactions interfere with A. actinomycetemcomitans colonization of epithelial cells in vitro, and demonstrated the potential beneficial effects of S. mitis, S. salivarius, and S. sanguinis.
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Affiliation(s)
- W Teughels
- Catholic University Leuven, Research Group for Microbial Adhesion, Department of Periodontology, Leuven, Belgium.
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8
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Abstract
This study examined the hypothesis of an intra-oral shift, during initial periodontal therapy, from a periopathogenic to a cariogenic flora. Seventy-one patients with periodontitis were randomly allocated to one of the following treatment strategies: (1) scaling and root planing, quadrant by quadrant, at two-week intervals (NC); (2) full-mouth scaling and root planing within 24 hrs (FRP); or (3) full-mouth disinfection within 24 hrs, including antiseptics [chlorhexidine (CHX) or amine fluoride/stannous fluoride (F) for 2 mos, or CHX for 2 mos followed by F for 6 mos (CHX+F)]. At baseline and after 2, 4, and 8 mos, bacterial samples were taken from supra- and subgingival plaque, saliva, and tongue. The detection frequencies and relative proportions of Streptococcus mutans increased in the NC and FRP groups, but decreased in the F group. In the CHX group, these species disappeared temporarily, but they disappeared for the entire 8 mos in the CHX+F group. These observations were similar for all sample locations. The periopathogens decreased in all groups. This finding confirms the abovementioned hypothesis and indicates a need for caries prophylactic regimens.
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Affiliation(s)
- M De Soete
- Department of Periodontology, Faculty of Medicine, Catholic University of Leuven, Belgium
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9
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Ghijselings E, Coucke W, Verdonck A, Teughels W, Quirynen M, Pauwels M, Carels C, van Gastel J. Long-term changes in microbiology and clinical periodontal variables after completion of fixed orthodontic appliances. Orthod Craniofac Res 2013; 17:49-59. [DOI: 10.1111/ocr.12031] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2013] [Indexed: 12/20/2022]
Affiliation(s)
- E. Ghijselings
- Department of Oral Health Sciences - Orthodontics; KU Leuven & Dentistry, University Hospitals Leuven; Belgium
| | - W. Coucke
- Department of Orthodontics and Craniofacial Biology; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
| | - A. Verdonck
- Department of Oral Health Sciences - Orthodontics; KU Leuven & Dentistry, University Hospitals Leuven; Belgium
| | - W. Teughels
- Department of Oral Health Sciences - Periodontology; KU Leuven & Dentistry, University Hospitals Leuven; Belgium
| | - M. Quirynen
- Department of Oral Health Sciences - Periodontology; KU Leuven & Dentistry, University Hospitals Leuven; Belgium
| | - M. Pauwels
- Department of Oral Health Sciences - Periodontology; KU Leuven & Dentistry, University Hospitals Leuven; Belgium
| | - C. Carels
- Department of Oral Health Sciences - Orthodontics; KU Leuven & Dentistry, University Hospitals Leuven; Belgium
- Department of Quality of Medical Laboratories; Scientific Institute of Public Health; Brussels Belgium
| | - J. van Gastel
- Department of Oral Health Sciences - Orthodontics; KU Leuven & Dentistry, University Hospitals Leuven; Belgium
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10
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Van Beneden K, Geers C, Pauwels M, Mannaerts I, Wissing KM, Van den Branden C, van Grunsven LA. Comparison of trichostatin A and valproic acid treatment regimens in a mouse model of kidney fibrosis. Toxicol Appl Pharmacol 2013; 271:276-84. [PMID: 23707763 DOI: 10.1016/j.taap.2013.05.013] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 05/09/2013] [Accepted: 05/10/2013] [Indexed: 01/04/2023]
Abstract
Histone deacetylase (HDAC) inhibitors are promising new compounds for the therapy of fibrotic diseases. In this study we compared the effect of two HDAC inhibitors, trichostatin A and valproic acid, in an experimental model of kidney fibrosis. In mice, doxorubicin (adriamycin) can cause nephropathy characterized by chronic proteinuria, glomerular damage and interstitial inflammation and fibrosis, as seen in human focal segmental glomerulosclerosis. Two treatment regimens were applied, treatment was either started prior to the doxorubicin insult or delayed until a significant degree of proteinuria and fibrosis was present. Pre-treatment of trichostatin A significantly hampered glomerulosclerosis and tubulointerstitial fibrosis, as did the pre-treatment with valproic acid. In contrast, the development of proteinuria was only completely inhibited in the pre-treated valproic acid group, and not in the pre-treated trichostatin A animals. In the postponed treatment with valproic acid, a complete resolution of established doxorubicin-induced proteinuria was achieved within three days, whereas trichostatin A could not correct proteinuria in such a treatment regimen. However, both postponed regimens have comparable efficacy in maintaining the kidney fibrosis to the level reached at the start of the treatments. Moreover, not only the process of fibrosis, but also renal inflammation was attenuated by both HDAC inhibitors. Our data confirm a role for HDACs in renal fibrogenesis and point towards a therapeutic potential for HDAC inhibitors. The effect on renal disease progression and manifestation can however be different for individual HDAC inhibitors.
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Affiliation(s)
- Katrien Van Beneden
- Department of Human Anatomy, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels, Belgium.
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11
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Van Beneden K, Mannaerts I, Pauwels M, Van den Branden C, van Grunsven LA. HDAC inhibitors in experimental liver and kidney fibrosis. Fibrogenesis Tissue Repair 2013; 6:1. [PMID: 23281659 PMCID: PMC3564760 DOI: 10.1186/1755-1536-6-1] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Accepted: 11/29/2012] [Indexed: 02/08/2023]
Abstract
Histone deacetylase (HDAC) inhibitors have been extensively studied in experimental models of cancer, where their inhibition of deacetylation has been proven to regulate cell survival, proliferation, differentiation and apoptosis. This in turn has led to the use of a variety of HDAC inhibitors in clinical trials. In recent years the applicability of HDAC inhibitors in other areas of disease has been explored, including the treatment of fibrotic disorders. Impaired wound healing involves the continuous deposition and cross-linking of extracellular matrix governed by myofibroblasts leading to diseases such as liver and kidney fibrosis; both diseases have high unmet medical needs which are a burden on health budgets worldwide. We provide an overview of the potential use of HDAC inhibitors against liver and kidney fibrosis using the current understanding of these inhibitors in experimental animal models and in vitro models of fibrosis.
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Affiliation(s)
- Katrien Van Beneden
- Department of Human Anatomy, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels, Belgium
| | - Inge Mannaerts
- Department of Cell Biology, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels, Belgium
| | - Marina Pauwels
- Department of Human Anatomy, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels, Belgium
| | | | - Leo A van Grunsven
- Department of Cell Biology, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels, Belgium
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Yi Chun DX, Alexandre H, Edith B, Nacera O, Julie P, Chantal J, Eric R, Zhang X, Jin Y, Miravete M, Dissard R, Klein J, Gonzalez J, Caubet C, Pecher C, Pipy B, Bascands JL, Mercier-Bonin M, Schanstra J, Buffin-Meyer B, Claire R, Rigothier C, Richard D, Sebastien L, Moin S, Chantal B, Christian C, Jean R, Migliori M, Migliori M, Cantaluppi V, Mannari C, Medica D, Giovannini L, Panichi V, Goldwich A, Alexander S, Andre G, Amann K, Migliorini A, Sagrinati C, Angelotti ML, Mulay SR, Ronconi E, Peired A, Romagnani P, Anders HJ, Chiang WC, Lai CF, Peng WH, Wu CF, Chang FC, Chen YT, Lin SL, Chen YM, Wu KD, Lu KS, Tsai TJ, Virgine O, Qing Feng F, Zhang SY, Dominique D, Vincent A, Marina C, Philippe L, Georges G, Pawlak A, Sahali D, Matsumoto S, Kiyomoto H, Ichimura A, Dan T, Nakamichi T, Tsujita T, Akahori K, Ito S, Miyata T, Xie S, Zhang B, Shi W, Yang Y, Nagasu H, Satoh M, Kidokoro K, Nishi Y, Ihoriya C, Kadoya H, Sasaki T, Kashihara N, Wu CF, Chang FC, Chen YT, Chou YH, Duffield J, Lin SL, Rocca C, Rocca C, Gregorini M, Corradetti V, Valsania T, Bedino G, Bosio F, Pattonieri EF, Esposito P, Sepe V, Libetta C, Rampino T, Dal Canton A, Bedino G, Gregorini M, Corradetti V, Rocca C, Pattonieri EF, Valsania T, Bosio F, Esposito P, Sepe V, Libetta C, Rampino T, Dal Canton A, Omori H, Kawada N, Inoue K, Ueda Y, Yamamoto R, Matsui I, Kaimori J, Takabatake Y, Moriyama T, Isaka Y, Rakugi H, Wasilewska A, Taranta-Janusz K, Deebek W, Kuroczycka-Saniutycz E, Lee AS, Lee AS, Lee JE, Jung YJ, Kang KP, Lee S, Kim W, Arfian N, Emoto N, Yagi K, Nakayama K, Hartopo AB, Nugrahaningsih DA, Yanagisawa M, Hirata KI, Munoz-Felix JM, Lopez-Novoa JM, Martinez-Salgado C, Oujo B, Munoz-Felix JM, Arevalo M, Bernabeu C, Perez-Barriocanal F, Lopez-Novoa JM, Jesper K, Nathalie V, Pierre G, Yi Chun DX, Alexandre H, Eric R, Iyoda M, Shibata T, Matsumoto K, Shindo-Hirai Y, Kuno Y, Wada Y, Akizawa T, Schwartz I, Schwartz D, Prot Bertoye C, Prot Bertoye C, Terryn S, Claver J, Beghdadi WB, Monteiro R, Blank U, Devuyst O, Daugas E, Van Beneden K, Geers C, Pauwels M, Mannaerts I, Van den Branden C, Van Grunsven LA, Seckin I, Pekpak M, Uzunalan M, Uruluer B, Kokturk S, Ozturk Z, Sonmez H, Yaprak E, Furuno Y, Tsutsui M, Morishita T, Shimokawa H, Otsuji Y, Yanagihara N, Kabashima N, Ryota S, Kanegae K, Miyamoto T, Nakamata J, Ishimatsu N, Tamura M, Nakagawa T, Nakagawa T, Ichikawa K, Miyamoto M, Takabayashi D, Yamazaki H, Kakeshita K, Koike T, Kagitani S, Tomoda F, Hamashima T, Ishii Y, Inoue H, Sasahara M, El Machhour F, Kerroch M, Mesnard L, Chatziantoniou C, Dussaule JC, Inui K, Sasai F, Maruta Y, Nishiwaki H, Kawashima E, Inoue Y, Yoshimura A, Matsumoto K, Matsumoto K, Iyoda M, Shibata T, Wada Y, Shindo-Hirai Y, Kuno Y, Akizawa T, Musacchio E, Priante G, Valvason C, Sartori L, Baggio B, Kim JH, Gross O, Diana R, Gry DH, Asimal B, Johanna T, Imke SE, Lydia W, Gerhard-Anton M, Hassan D, Cano JL, Griera M, Olmos G, Martin P, Cortes MA, Lopez-Ongil S, Rodriguez-Puyol D, DE Frutos S, Gonzalez M, DE Frutos S, Cano JL, Luengo A, Martin P, Rodriguez-Puyol M, Calleros L, Lupica R, Lacquaniti A, Donato V, Maggio R, Mastroeni C, Lucisano S, Cernaro V, Fazio MR, Quartarone A, Buemi M, Kacik M, Goedicke S, Eggert H, Hoyer JD, Wurm S, Wurm S, Steege A, Banas M, Kurtz A, Banas B, Lasagni L, Lazzeri E, Peired A, Angelotti ML, Ronconi E, Romoli S, Romagnani P, Schaefer I, Teng B, Worthmann K, Haller H, Schiffer M, Prattichizzo C, Netti GS, Rocchetti MT, Cormio L, Carrieri G, Stallone G, Grandaliano G, Ranieri E, Gesualdo L, Kucher A, Smirnov A, Parastayeva M, Beresneva O, Kayukov I, Zubina I, Ivanova G, Abed A, Schlekenbach L, Foglia B, Chatziantoniou C, Kwak B, Chadjichristos C, Queisser N, Schupp N, Brand S, Himer L, Himer L, Szebeni B, Sziksz E, Saijo S, Kis E, Prokai A, Banki NF, Fekete A, Tulassay T, Vannay A, Hegner B, Schaub T, Lange C, Dragun D, Klinkhammer BM, Rafael K, Monika M, Anna M, Van Roeyen C, Boor P, Eva Bettina B, Simon O, Esther S, Floege J, Kunter U, Hegner B, Janke D, Schaub T, Lange C, Jankowski J, Dragun D, Hayashi M, Takamatsu I, Horimai C, Yoshida T, Seno DI Marco G, Koenig M, Stock C, Reiermann S, Amler S, Koehler G, Fobker M, Buck F, Pavenstaedt H, Lang D, Brand M, Plotnikov E, Morosanova M, Pevzner I, Zorova L, Pulkova N, Zorov D, Wornle M, Ribeiro A, Belling F, Merkle M, Nakazawa D, Nishio S, Shibasaki S, Tomaru U, Akihiro I, Kobayashi I, Imanishi Y, Kurajoh M, Nagata Y, Yamagata M, Emoto M, Michigami T, Ishimura E, Inaba M, Nishi Y, Satoh M, Sasaki T, Kashihara N, Wu CC, Lu KC, Chen JS, Chu P, Lin YF, Eller K, Schroll A, Banas M, Kirsch A, Huber J, Weiss G, Theurl I, Rosenkranz AR, Zawada A, Rogacev K, Achenbach M, Fliser D, Held G, Heine GH, Miyamoto Y, Iwao Y, Watanabe H, Kadowaki D, Ishima Y, Chuang VTG, Sato K, Otagiri M, Maruyama T, Ueda Y, Iwatani H, Isaka Y, Watanabe H, Honda D, Miyamoto Y, Noguchi T, Kadowaki D, Ishima Y, Tanaka M, Tanaka H, Fukagawa M, Otagiri M, Maruyama T, Wornle M, Ribeiro A, Pircher J, Koppel S, Mannell H, Krotz F, Merkle M, Virzi GM, Bolin C, Cruz D, Scalzotto E, De Cal M, Vescovo G, Ronco C, Virzi GM, Bolin C, Cruz D, Scalzotto E, De Cal M, Vescovo G, Ronco C, Grobmayr R, Lech M, Ryu M, Anders HJ, Aoshima Y, Mizobuchi M, Ogata H, Kumata C, Nakazawa A, Kondo F, Ono N, Koiwa F, Kinugasa E, Akizawa T, Freisinger W, Lale N, Lampert A, Ditting T, Heinlein S, Schmieder RE, Veelken R, Nave H, Perthel R, Suntharalingam M, Bode-Boger S, Beutel G, Kielstein J, Rodrigues-Diez R, Rodrigues-Diez R, Rayego-Mateos S, Lavoz C, Stark Aroeira LG, Orejudo M, Alique M, Ortiz A, Egido J, Ruiz-Ortega M, Oskar W, Rusan C, Schaub T, Hegner B, Dragun D, Padberg JS, Wiesinger A, Brand M, Seno DI Marco G, Reuter S, Grabner A, Kentrup D, Lukasz A, Oberleithner H, Pavenstadt H, Kumpers P, Eberhardt HU, Skerka C, Chen Q, Hallstroem T, Hartmann A, Kemper MJ, Zipfel PF, N'gome-Sendeyo K, Fan QF, Zhang SY, Pawlak A, Sahali D, Wornle M, Ribeiro A, Merkle M, Toblli J, Toblli J, Cao G, Giani JF, Dominici FP, Kim JS, Yang JW, Kim MK, Han BG, Choi SO. Experimental pathology. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Van Beneden K, Geers C, Pauwels M, Mannaerts I, Verbeelen D, van Grunsven LA, Van den Branden C. Valproic acid attenuates proteinuria and kidney injury. J Am Soc Nephrol 2011; 22:1863-75. [PMID: 21868496 DOI: 10.1681/asn.2010111196] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Inhibitors of histone deacetylase (HDAC) have anti-inflammatory and antifibrotic effects in several organs and tissues, but their effect on the progression of renal disease is unknown. Here, we studied the effect of valproic acid in adriamycin-induced nephropathy in mice. Administration of valproic acid before kidney injury prevented the development of proteinuria and the onset of glomerulosclerosis. Even after postponing treatment until the peak of adriamycin-induced proteinuria, valproic acid rapidly decreased the quantity of proteinuria and attenuated the progression of renal disease. Valproic acid abrogated the decrease in glomerular acetylation observed during adriamycin-induced nephropathy. Furthermore, valproic acid attenuated the significant upregulation of profibrotic and proinflammatory genes, the deposition of collagen, and the infiltration of macrophages into the kidney. Valproic acid decreased glomerular apoptosis and proliferation induced by adriamycin. Ultrastructural studies further supported the protective effect of valproic acid on podocytes in this model. Taken together, these data suggest that HDACs contribute to the pathogenesis of renal disease and that HDAC inhibitors may have therapeutic potential in CKD.
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Affiliation(s)
- Katrien Van Beneden
- Department of Human Anatomy, Liver Cell Biology Lab, Vrije Universiteit Brussel, Brussels, Belgium
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Loozen G, Boon N, Pauwels M, Quirynen M, Teughels W. Live/dead real-time polymerase chain reaction to assess new therapies against dental plaque-related pathologies. Mol Oral Microbiol 2011; 26:253-61. [DOI: 10.1111/j.2041-1014.2011.00615.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Pauwels M, Rogiers V. Human health safety evaluation of cosmetics in the EU: A legally imposed challenge to science. Toxicol Appl Pharmacol 2010; 243:260-74. [DOI: 10.1016/j.taap.2009.12.007] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2009] [Revised: 12/04/2009] [Accepted: 12/05/2009] [Indexed: 11/25/2022]
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Ceyssens B, Pauwels M, Meulemans B, Verbeelen D, Van den Branden C. Increased Oxidative Stress in the Mouse Adriamycin Model of Glomerulosclerosis Is Accompanied by Deposition of Ferric Iron and Altered GGT Activity in Renal Cortex. Ren Fail 2009; 26:21-7. [PMID: 15083917 DOI: 10.1081/jdi-120028539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Chronic renal failure evolves inevitable towards glomerular and tubulo-interstitial sclerosis. This pathological process involves a disturbed redox status of the kidney tissue, leading to irreversible damage. In this study we investigate in an adriamycin model of chronic renal failure in mice the evolution of in vivo hydrogen peroxide production, and the possible role of gamma-glutamyl transpeptidase and ferric iron in the process. Histological changes and ferric iron deposits are evaluated by histochemical staining. To evaluate oxidative stress residual catalase activity, TBARS formation and gamma-glutamyl transpeptidase activity are measured spectrophotometrically. While catalase activity remains the same, a decreased residual catalase activity indicates an increased formation of hydrogen peroxide. Both the activity of gamma-glutamyl transpeptidase and TBARS formation is increased at early stages of the disease. Ferric iron is clearly present in the proximal tubule. Twenty days after adriamycin injection all parameters decrease, probably due to the destruction of the tissue. Our data show the involvement of oxidative stress in the progression of adriamycin induced renal failure in mice. Both radical production and oxidative damage are measurable, while the altered activity of gamma-glutamyl transpeptidase and the deposition of ferric iron suggest the involvement of these factors in the development of a disturbed redox status in the kidney cortex.
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Affiliation(s)
- Bart Ceyssens
- Department of Human Anatomy, Academic Hospital of the Vrije Universiteit Brussel, Brussels, Belgium.
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Pauwels M, Dejaegher B, Vander Heyden Y, Rogiers V. Critical analysis of the SCCNFP/SCCP safety assessment of cosmetic ingredients (2000–2006). Food Chem Toxicol 2009; 47:898-905. [DOI: 10.1016/j.fct.2009.01.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sliepen I, Van Essche M, Pauwels M, Van Eldere J, Hofkens J, Quirynen M, Teughels W. Colonization of hard and soft surfaces byAggregatibacter actinomycetemcomitansunder hydrodynamic conditions. ACTA ACUST UNITED AC 2008; 23:498-504. [DOI: 10.1111/j.1399-302x.2008.00461.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Van Beneden K, van Grunsven LA, Geers C, Pauwels M, Desmoulière A, Verbeelen D, Geerts A, Van den Branden C. CRBP-I in the renal tubulointerstitial compartment of healthy rats and rats with renal fibrosis. Nephrol Dial Transplant 2008; 23:3464-71. [PMID: 18503097 DOI: 10.1093/ndt/gfn290] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Cellular retinol-binding protein I (CRBP-I), a member of the intracellular lipid-binding protein (iLBP) superfamily, is a specific marker of quiescent stellate cells in the healthy human liver. In the diseased fibrotic/cirrhotic liver, portal and septal myofibroblasts acquire CRBP-I expression, while activated hepatic stellate cells maintain their CRBP-I expression. Here, we investigate the distribution of CRBP-I in the renal cortex of healthy rats and rats with renal fibrosis. METHODS Kidneys of healthy and adriamycin-treated rats were studied by immunohistochemistry, using antibodies against CRBP-I, desmin, vimentin and alpha-smooth muscle actin (alpha-SMA). Double stainings were done with immunofluorescence. Western blotting was performed to semi-quantify the expression levels of vimentin, desmin, alpha-SMA and CRBP-I. RESULTS In the normal rat kidney, the convoluted proximal tubular epithelial cells express CRBP-I; no expression is found in the interstitium, nor in the glomeruli. In the adriamycin-induced fibrotic rat kidney, CRBP-I expression diminishes in the convoluted proximal tubular epithelial cells, whereas peritubular myofibroblasts in the interstitium acquire CRBP-I expression. CONCLUSIONS In the tubulointerstitial compartment of the adriamycin-induced fibrotic rat kidney, CRBP-I is expressed in a different pattern than in the healthy rat kidney. As the convoluted proximal tubular epithelial cells dedifferentiate during fibrosis, CRBP-I expression decreases. Furthermore, de novo expression of CRBP-I is found in activated myofibroblast-like cells in the interstitium of adriamycin-treated rats. CRBP-I is therefore a useful marker to identify a subpopulation of activated/ myodifferentiated fibroblasts in the rat kidney.
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Affiliation(s)
- Katrien Van Beneden
- Vrije Universiteit Brussel, Menselijke Anatomie, Laarbeeklaan 103, B-1090 Brussels, Belgium.
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Abstract
The treatment of periodontitis/peri-implantitis involves the reduction/eradication of periopathogens. After therapy, beneficial and pathogenic species recolonize the subgingival area. The dynamics of recolonization and especially the role of the supragingival environment in this process are still not well-understood. This prospective, split-mouth study followed the early colonization of 'pristine' pockets created during implant surgery (16 partially edentulous patients), to record the time needed before a complex subgingival flora could be established with the supragingival area as the single source. Four subgingival plaque samples were taken from shallow and medium pockets around implants (test), and neighboring teeth (undisturbed microbiota as reference) 1, 2, and 4 wks after abutment connection. Checkerboard DNA-DNA hybridization and culture data revealed a complex microbiota (including several pathogenic species) in the pristine pockets within a wk, with a minimal increase in counts up to 4 wks. Analysis of these data demonstrated that, even with the supragingival environment as the single source for colonizing bacteria, a complex subgingival microbiota can develop within 1 wk.
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Affiliation(s)
- M Quirynen
- Department of Periodontology, Oral Pathology and Maxillo-Facial Surgery, Faculty of Medicine, Catholic University of Leuven, Kapucijnenvoer 7, B-3000 Leuven, Belgium.
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Teughels W, Sliepen I, De Keersmaecker S, Quirynen M, Lippmann J, Pauwels M, Fives-Taylor P. Influence of genetic background on transformation and expression of Green Fluorescent Protein in Actinobacillus actinomycetemcomitans. ACTA ACUST UNITED AC 2005; 20:274-81. [PMID: 16101962 DOI: 10.1111/j.1399-302x.2005.00224.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND/AIMS The development of an electro-transformation system and the construction of shuttle plasmids for Actinobacillus actinomycetemcomitans have enhanced the molecular analysis of virulence factors. However, inefficient transformation is frequently encountered. This study investigated the efficiency of electro-transformation and expression of Green Fluorescent Protein (GFP) in 12 different A. actinomycetemcomitans strains. The influence of the plasmid vector, serotype, and phenotype were the major factors taken into consideration. MATERIAL AND METHODS Twelve serotyped A. actinomycetemcomitans strains were independently electro-transformed with two different Escherichia coli-A. actinomycetemcomitans shuttle plasmids (pVT1303 and pVT1304), both containing an identical ltx-GFPmut2 gene construct but a different backbone (pDMG4 and pPK1, respectively). The transformation efficiency, transformation frequency, and electro-transformation survival rate were determined by culture techniques. GFP expression was observed at the colony level by fluorescence microscopy. RESULTS All strains could be transformed with both plasmids. However, major differences were observed for the transformation efficiency, transformation frequency, and electro-transformation survival rate between strains. The data demonstrated that plasmid vector, serotype, and phenotype are key players for obtaining a successful transformation. An inverted relationship between the electro-transformation survival rate and tranformation frequency was also observed. GFP expression was also influenced by phenotype, serotype and plasmid vector. CONCLUSIONS The serotype of A. actinomycetemcomitans has an important influence on its survival after electro-transformation and on transformation frequency. The expression of GFP is strain and plasmid vector dependent.
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Affiliation(s)
- W Teughels
- Catholic University Leuven, Department of Periodontology, Leuven, Belgium.
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Quirynen M, Zhao H, Soers C, Pauwels M, Van Steenberghe D. P32 Saliva incubation as replacement for intra-oral malodour evaluation. Oral Dis 2005. [DOI: 10.1111/j.1601-0825.2005.01105_55.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Van Steenberghe D, Zhao H, Soers C, Pauwels M, Quirynen M. O8 Impact of periodontal therapy (including antiseptics) on tongue coating and malodour. Oral Dis 2005. [DOI: 10.1111/j.1601-0825.2005.01105_8.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
OBJECTIVES Tongue cleaning has been advocated to improve oral malodor and to reduce reinfection of periodontal niches by eliminating tongue coating and/or reducing putrefaction by bacteria. MATERIAL AND METHODS This cross-over, single-blind study on periodontitis-free, non-smoking, subjects with habitual oral hygiene (n=16), evaluated the effect of tongue cleaning (with either plastic scraper or nylon multi-tufted toothbrush), on the microbial load of the tongue dorsum (anterior and posterior of the sulcus terminalis), the extent of tongue coating, and taste sensation for bitter, sweet, salt, and sour. Both devices had been used twice daily for 2 weeks (toothbrush three forward-backward movements along the linea mediana and for each longitudinal third of the tongue; two strokes with the scraper along the linea mediana and along the borders of the tongue). RESULTS Two weeks of tongue brushing or scraping resulted in only negligible reductions in aerobic and anaerobic bacteria on the tongue (reductions <0.5 log). The amount of tongue coating, however, decreased significantly (p<0.05), with both devices. The taste sensation improved after 2 weeks of tongue cleaning, especially with the scraper (significant improvements for quinine and sodium chloride). CONCLUSION Tongue cleaning improves taste sensation and seems to reduce the substrata for putrefaction, rather than the bacterial load.
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Affiliation(s)
- M Quirynen
- Department of Periodontology, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Faculty of Medicine, Catholic University of Leuven, Leuven, Belgium.
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Van den Branden C, Ceyssens B, Pauwels M, Van Wichelen G, Heirman I, Jie N, Verbeelen D. Effect of mycophenolate mofetil on glomerulosclerosis and renal oxidative stress in rats. Nephron Clin Pract 2004; 95:e93-9. [PMID: 14646361 DOI: 10.1159/000074325] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2003] [Accepted: 08/05/2003] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Mycophenolate mofetil (MMF) is known to attenuate glomerulosclerosis in experimental models of renal failure. We investigated whether this is mediated by reduction of oxidative stress. METHODS Effects of MMF on oxidative stress are studied in an experimental rat model (NA model) involving unilateral nephrectomy and two intravenous injections with adriamycin (2 mg/kg). Rats are sacrificed after 2 and 6 weeks. Glomerulosclerosis and tubulointerstitial lesions are demonstrated by histological techniques. Presence of macrophages/monocytes (ED1) and myofibroblasts (alpha-SMA) is demonstrated by immunohistochemistry. Oxidative stress is evaluated by enzymatic measurements (AOE), spectrofluorometry (TBARS), immunohistochemistry (MDA and HNE) and histology (ferric iron deposition). RESULTS The NA model shows proteinuria, hypercholesterolemia, beginning glomerulosclerosis, tubulointerstitial sclerosis and tubular dilatation, glomerular, periglomerular and interstitial presence of alpha-SMA and increased presence of macrophages/monocytes after 6 weeks. Oxidative stress in renal cortex is apparent (increased cortex TBARS concentration, increased glomerular presence of MDA and HNE, decreased activity of antioxidant enzymes, ferric iron deposition in proximal tubules) after 6 weeks. MMF administration results in a decrease of glomerulosclerosis, interstitial sclerosis, glomerular and periglomerular expression of alpha-SMA and the number of ED1-positive cells in tubulointerstitium and glomeruli. Proteinuria and cholesterolemia are not decreased. TBARS level, and activities of catalase, Mn and Cu/Zn superoxide dismutase as well as the presence of ferric iron in the proximal tubules are not changed by MMF treatment. Cortex activity of glutathione peroxidase returns to normal. CONCLUSION MMF has a favorable effect on glomerular and interstitial fibrosis in the NA model of kidney disease, but not on proteinuria and cholesterolemia. Improvement of fibrosis cannot be explained by major changes in oxidative stress or antioxidant defense.
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Vanhaecke T, De Smet K, Beken S, Pauwels M, Vercruysse A, Rogiers V. Rat hepatocyte cultures. Conventional monolayer cultures and cocultures with rat liver epithelial cells. Methods Mol Biol 2003; 107:311-7. [PMID: 14577240 DOI: 10.1385/0-89603-519-0:311] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Affiliation(s)
- T Vanhaecke
- Department of Toxicology, Vrije Universiteit Brussel, Belgium
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Vrielinck L, Politis C, Schepers S, Pauwels M, Naert I. Image-based planning and clinical validation of zygoma and pterygoid implant placement in patients with severe bone atrophy using customized drill guides. Preliminary results from a prospective clinical follow-up study. Int J Oral Maxillofac Surg 2003; 32:7-14. [PMID: 12653226 DOI: 10.1054/ijom.2002.0337] [Citation(s) in RCA: 139] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The zygoma implant has been designed for those situations where there is insufficient bone in the upper jaw, which would otherwise require onlay or inlay (sinus) bonegrafts. The aim of the study was to present and validate a planning system for implant insertion based on preoperative CT imaging. It allows the surgeon to determine the desired position of different kinds of implants. Finally a customized drill guide is produced by stereolithography. In this study, zygoma, pterygoid and regular platform implants were used. The treatment protocol is validated through 12 case studies, selected at random from the total patient group (n=29 patients). From postoperative images, the exact implant location is determined and the deviation of axes between planned and inserted implants is calculated. In this in vivo study, displacements, varying according to the type of implant and the location of the implants, were observed. From a clinical standpoint, most of the inserted implants were judged to be adequately sited. A prospective clinical follow-up study was performed on all 29 patients. Although all patients presented with severe maxillary atrophy, excellent cumulative survival rates (92%) for the zygoma implants and 93% for regular platform implants have been obtained.
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Affiliation(s)
- L Vrielinck
- Department Oral and Maxillofacial Surgery, Ziekenhuis Oost-Limburg, Schiepse bos 6, B-3600 Genk, Belgium.
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Dierickx K, Pauwels M, Van Eldere J, Cassiman JJ, Van Steenberghe D, Quirynen M. Viability of cultured periodontal pocket epithelium cells and Porphyromonas gingivalis association. J Clin Periodontol 2002; 29:987-96. [PMID: 12472991 DOI: 10.1034/j.1600-051x.2002.291103.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES Porphyromonas gingivalis, one of the key pathogens in the development of periodontitis, produces a number of virulence factors that might explain its pathogenicity. One of them is the ability to adhere and invade pocket epithelium. The aim of this study was to follow, over time, the association of P. gingivalis and consequent morphological changes of the pocket epithelium cells. MATERIAL AND METHODS The association capacity of four P. gingivalis serotypes [K1, K2, K4, K- (nonencapsulated)] with in vitro cultured mono-layers from periodontal pocket epithelial cells of patients with periodontitis, was followed by fluorescence microscopy and bacterial culture. The contact time between bacteria and epithelium cells ranged from 45 min to 8 h. The microscopic evaluation allowed differentiation between dead and living cells (bacteria as well as epithelium) and description of the morphological changes after association. RESULTS A highly significant difference in the number of associating bacteria was found between dead and living epithelium cells, and between non-capsulated and capsulated strains. A significant increase in the proportion of dead pocket epithelium cells was found with prolonged association time. The morphological changes (rounding of the epithelial cell, detachment from the glass cover-slip and loss of intercellular contact) occurred faster for mono-layers inoculated with the non-encapsulated P. gingivalis strain. CONCLUSIONS This study indicates that dead pocket epithelium cells harbor more P. gingivalis cells, and that a positive correlation exists between contact time and cell death. For the P. ginigvalis species, non-encapsulated strains associate in higher number. As a result, the damage they cause to the host cell seems to occur faster than occurs in encapsulated strains. As such, cell death can be seen as the end-result of bacterial association.
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Affiliation(s)
- K Dierickx
- Catholic University of Leuven, Faculty of Medicine, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Department of Periodontology, Kapucijnenvoer 7, B-3000 Leuven, Belgium
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Van Schil P, van der Schoot J, Poniewierski J, Pauwels M, Carp L, Germonpré P, De Backer W. Remediastinoscopy after neoadjuvant therapy for non-small cell lung cancer. Lung Cancer 2002; 37:281-5. [PMID: 12234697 DOI: 10.1016/s0169-5002(02)00101-0] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Despite technical difficulties due to mediastinal fibrosis, remediastinoscopy can be a valuable tool in the restaging of non-small cell lung cancer after neoadjuvant therapy. The aim of our study was to evaluate the feasibility, sensitivity and accuracy of remediastinoscopy. From November 1994 to July 2001 we performed a remediastinoscopy in 27 patients after neoadjuvant therapy. Their age ranged from 35 to 80 years (mean 61.9+/-11.9). In all 27 patients it was possible to perform a remediastinoscopy without major technical difficulties and take biopsies of the lymph nodes that were initially invaded by tumour. Remediastinoscopy was positive in 11 patients (40.7%) and negative in 16 (59.3%). In the 11 patients with a positive remediastinoscopy a complete resection was not judged possible and therefore, an unnecessary thoracotomy was avoided. In four patients, remediastinoscopy turned out to be false negative. So, in our series, sensitivity was 73%, specificity 100% and accuracy 85%. The positive and negative predictive values were 100 and 75%, respectively. Previous mediastinoscopy is no contra-indication for a repeat one after neoadjuvant therapy. Although sensitivity and accuracy are lower than that of a first mediastinoscopy, remediastinoscopy is useful to select patients for surgical resection after induction therapy.
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Affiliation(s)
- P Van Schil
- Department of Thoracic and Vascular Surgery, University Hospital of Antwerp, Wilrijkstraat 10, B-2650 Edegem, (Antwerp), Belgium.
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Van den Branden C, Deman A, Ceyssens B, Pauwels M, Empsen C, Verbeelen D. Vitamin E protects renal antioxidant enzymes and attenuates glomerulosclerosis in Adriamycin-treated rats. Nephron Clin Pract 2002; 91:129-33. [PMID: 12021529 DOI: 10.1159/000057614] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS In the rat Adriamycin model of chronic renal failure, the development of glomerulosclerosis and tubulointerstitial lesions is accompanied by decreased activities and mRNA levels of the antioxidant enzymes. In this study, we investigated the effect of oral vitamin E supplementation on antioxidant enzyme activities in both the cortex and isolated glomeruli from Adriamycin-treated rats. METHODS Glomerulosclerosis, tubulointerstitial lesions and ferric iron deposits were evaluated by histochemical staining methods, and antioxidant enzyme activities were measured by spectrophotometry. RESULTS Vitamin E supplementation of the normal diet attenuates Adriamycin-induced glomerulosclerosis and tubulointerstitial lesions, but not proteinuria and serum total cholesterol, low-density lipoprotein cholesterol, triglycerides and total protein concentrations. In the cortex, vitamin E completely prevented a decrease in enzyme activity for Cu/Zn superoxide dismutase and catalase, and partly for Mn superoxide dismutase and glutathione peroxidase. In the glomeruli, vitamin E completely prevented a decrease in activity for Cu/Zn superoxide dismutase, catalase and glutathione peroxidase, and partly for Mn superoxide dismutase. CONCLUSION Dietary supplementation of vitamin E protects the activities of antioxidant enzymes in the kidney cortex and glomeruli, and attenuates the evolution towards terminal renal failure in rats treated with Adriamycin.
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Quirynen M, de Soete M, Pauwels M, Goossens K, Teughels W, van Eldere J, van Steenberghe D. Bacterial survival rate on tooth- and interdental brushes in relation to the use of toothpaste. J Clin Periodontol 2001; 28:1106-14. [PMID: 11737507 DOI: 10.1034/j.1600-051x.2001.281204.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND, AIMS Previous studies indicated that oral hygiene aids can play a rôle in the intra-oral translocation of pathogens. The survival rate of cariogenic and periodontopathogenic species on toothbrushes, with and without toothpaste, and interdental brushes was presently investigated. MATERIAL AND METHODS 12 periodontitis patients had their interdental spaces professionally cleaned with interdental brushes and their teeth with new toothbrushes with or without different dentifrices. Each time brushes were rinsed with tap water and stored dry at room temperature. At different time intervals an interdental brush or 4 tufts from a toothbrush were processed for vitality staining and selective and non-selective culturing procedures. RESULTS Immediately after rinsing, a toothbrush without toothpaste harboured 10(7), 10(8) and 10(7) colony forming units (CFU) of respectively aerobic, anaerobic and black pigmented species. An insignificant decrease occurred the first 24 hours and after 48 hours still 10(4) CFU of aerobic and anaerobic species could be cultured. No periodontopathogen remained detectable at 8 hours, except for Fusobacterium nucleatum. The proportion of vital bacteria decreased in 48 hours from 50% to 30%. Comparable results were obtained for interdental brushes. The bacterial survival rate on toothbrushes was significantly reduced by the use of a detergent containing toothpaste by 2 log at baseline, another 2 log at 4 hours and an extra log more at 8 hours for aerobic and anaerobic species. A toothpaste without detergent only had an insignificant bactericidal effect. CONCLUSION Toothpaste detergents decrease the survival rate of pathogenic species on a toothbrush and can thus limit the risk for bacterial translocation.
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Affiliation(s)
- M Quirynen
- Department of Periodontology, Research Group for Microbial Adhesion, Faculty of Medicine, Catholic University of Leuven, Leuven, Belgium.
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Quirynen M, Avontroodt P, Peeters W, Pauwels M, Coucke W, van Steenberghe D. Effect of different chlorhexidine formulations in mouthrinses on de novo plaque formation. J Clin Periodontol 2001; 28:1127-36. [PMID: 11737510 DOI: 10.1034/j.1600-051x.2001.281207.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Chlorhexidine (CHX) 0.2% solution, still the golden standard as mouthrinse for the prevention of plaque formation and development of gingivitis, has some limited side-effects such as extrinsic tooth staining, poor taste, taste disturbance, sensitivity changes in tongue, pain, and the content of alcohol. These side effects led to the search of new formulations. METHODS In this double-blind, randomised, cross-over study, 16 young dental students with a healthy periodontium, abolished all means of mechanical plaque control during 4 experimental periods of 11 days (separated from each other by a washout period of 3 weeks). During each experimental period, they rinsed 2x daily with one of the following mouthrinses in a randomised order: CHX 0.2% + alcohol (Corsodyl), CHX 0.12% + alcohol (Perio.Aid), CHX 0.12% + sodium fluoride 0.05% (Cariax Gingival) and CHX 0.12% + CPC 0.05% (Perio.Aid, new formulation). After 7 and 11 days of undisturbed plaque formation, clinical parameters were recorded, questionnaires completed and plaque samples (supragingivally and saliva) collected. RESULTS The CHX 0.12% + alcohol and the CHX 0.12% + CPC 0.05% formulations were as efficient as the CHX 0.2% mouthrinse in retarding de novo plaque formation (proven by clinical observations as well as by anaerobic and aerobic culture data), and always superior (p<0.001) to the CHX 0.12% + sodium fluoride 0.05% solution. The subjective ratings were in favour of the new CHX formulation when compared with the other CHX formulations, especially for taste (p<0.05). CONCLUSIONS The results of this study demonstrated the potential of a new CHX 0.12% + CPC 0.05% non-alcoholic formulation as an effective anti-plaque and anti-inflammatory agent with reduced unpleasant subjective side-effects.
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Affiliation(s)
- M Quirynen
- Department of Periodontology, Research group for Microbial adhesion, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Faculty of Medicine, Catholic University of Leuven, Leuven, Belgium.
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Abstract
BACKGROUND Morning breath odor is an often-encountered complaint. This double-blind, crossover, randomized study aimed to examine the bad breath-inhibiting effect of 3 commercially available mouthrinses on morning halitosis during an experimental period of 12 days without mechanical plaque control. METHODS Twelve medical students with a healthy periodontium refrained from all means of mechanical plaque control during 3 experimental periods of 12 days (with intervening washout periods of at least 3 weeks). A professional oral cleaning preceded each period. During each experimental period, as the only oral hygiene measure allowed, the students rinsed twice a day with one of the following formulations in a randomized order: CHX-Alc (a 0.2% chlorhexidine [CHX] solution); CHX-NaF (CHX 0.12% plus sodium fluoride 0.05%); or CHX-CPC-Zn (CHX 0.05% plus cetylpyridinium chloride 0.05% plus zinc lactate 0.14%). After 12 days, morning breath was scored via volatile sulfur compound (VSC) level measurements of the mouth air and organoleptic ratings of the mouth air, the expired air, and a scraping of the tongue coating. At the 12-day visit, a questionnaire (subjective ratings) was completed and samples taken from both the tongue coating and the saliva for anaerobic and aerobic culturing and vitality staining. The de novo supragingival plaque formation was also recorded. All parameters were correlated with the baseline registrations. RESULTS Although oral hygiene during the 3 experimental periods was limited to oral rinses, bad breath parameters systematically improved, with the exception of a slight increase in VSC levels while using CHX-Alc, a finding which was associated with the direct influence of the CHX on the sulfide monitor. The oral microbial load after the use of CHX-NaF remained unchanged, while for the CHX-Alc and CHX-CPC-Zn, significant reductions in both aerobic and anaerobic colony forming units (CFU)/ml were noticed in comparison with baseline data for both tongue coating and saliva samples. The composition of microflora, on the other hand, did not reveal significant changes. The supragingival plaque formation was inhibited, in descending order, by CHX-Alc, CHX-CPC-Zn, and CHX-NaF. The subjective scores for the rinses indicated a higher appreciation for CHX-CPC-Alc and CHX-NaF because of a better taste and fewer side effects. CONCLUSIONS The results of this study demonstrate that morning halitosis can be successfully reduced via daily use of mouthrinses. CHX-Alc and CHX-CPC-Zn mouthrinses result in a significant reduction of the microbial load of tongue and saliva.
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Affiliation(s)
- D van Steenberghe
- Department of Periodontology, Oral Pathology and Maxillo-Facial Surgery, Faculty of Medicine, Catholic University of Leuven, Belgium
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Abstract
BACKGROUND A new intragastric balloon is available for weight reduction. METHODS Patients consulting for a weight reduction plan and refusing any kind of actual surgery, or suffering from obesity but not meeting the IFSO standards for surgery, were offered the possibility of weight reduction by the BioEnterics intragastric balloon (BIB). A preoperative questionnaire was completed by all patients, inquiring about medical history, co-morbidity factors, dietary habits, previous treatments for weight and social, psychological, relational and economic impact of the obesity. BIB placement was done on an inpatient basis, under general anesthesia. Inflation was standardized at 500 ml saline. Intravenous antiemetic and spasmolytic drugs were given to control post-insertion nausea for 24 hours, and oral medication was administered on the patient's discharge. A standard 800 calorie diet was prescribed after dietitian's consultation. Extraction of the balloon was left to the patient's discretion at 3 or maximum 6 months after placement. Patients choosing for the maximal period received a formal invitation to extract the balloon. Evaluation of weight reduction was done at extraction and by questionnaire. RESULTS 126 patients (5 M, 121 F) with mean age of 35.6 years (20-62) were included after preoperative evaluation. Mean preoperative BMI was 37.7 kg/m2 (26.7-57.7 kg/m2), with a mean initial excessive weight of 35.3 kg (8.8-96.4 kg) and mean initial % excess weight of 32.2 (6.3-102). 69 patients were eligible for review; mean excess weight loss after 3 months was 48.6% and after 6 months 50.8%. Mean weight loss was 15.4 kg (0-35 kg). 76.8% of the patients (41/69) complained of severe nausea and vomiting lasting an average of 1 week (1 day-6 months), resulting in 3 patients in early removal of the balloon (at 1 day, 1 week, 1 month after placement respectively). 2 patients suffered gastric perforation presenting as acute peritonitis 3 and 4 months after placement and were operated. Extraction of the balloon was performed in 3 patients after 3 months and in 66 patients after 6 months. In 11 patients (22%), esophagitis was present (8 grade 1, 2 grade II, 1 grade III), and one patient showed diffuse gastric erosion. One patient required removal of the balloon by rigid esphagoscopy following technical failure of the endoscopic extraction device. 45 patients replied to the mailed, questionnaire; 15% (7/45) were very satisfied, 13% (6/45) satisfied, 22% (10/45) reasonably satisfied, 8.8% (4/45) unsatisfied and 40% very unsatisfied. Degree of satisfaction correlated poorly with weight loss. Results may be better with close continuous guidance by a counselor. CONCLUSION BIB as a means of weight reduction in the obese patient led to a 50.8% loss of excess weight after 6 months. Although severe morbidity can occur, the BIB provides a means for short-term weight reduction in conjunction with dietary measures.
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Affiliation(s)
- E Totté
- Academic Surgical Center Stuivenberg, Lange Beeldenkenstraat 267, B-2060 Antwerp, Belgium.
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De Craemer D, Lobe E, Pauwels M, Verbeelen D, Van den Branden C. Angiotensin II administration causes enhanced expression of glomerulosclerosis-related markers and decreased renal antioxidant enzyme activities in rats. Exp Nephrol 2001; 9:125-32. [PMID: 11150861 DOI: 10.1159/000052603] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Angiotensin II administration to rats during 6 weeks causes decreased activity of catalase and glutathione peroxidase in renal cortex. Rats show mild hypertension, subclinical signs of renal injury, increased glomerular expression of desmin, glomerular and interstitial expression of alpha-smooth muscle actin and an increased number of ED-1-positive cells in glomeruli. An inverse correlation exists between catalase activity and glomerular alpha-smooth muscle actin expression and between glutathione peroxidase activity and glomerular desmin expression. The decrease of antioxidant enzyme activity, early after angiotensin II administration, might be an important initiating factor in the complex process leading eventually to renal sclerosis by reduction of reactive oxygen intermediate breakdown. The significant relationship between markers of sclerosis and some antioxidant enzyme activities suggests either a causative link or a common triggering factor.
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Affiliation(s)
- D De Craemer
- Department of Human Anatomy, Vrije Universiteit Brussel and Academic Hospital, Brussels, Belgium
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Deman A, Ceyssens B, Pauwels M, Zhang J, Houte KV, Verbeelen D, Van den Branden C. Altered antioxidant defence in a mouse adriamycin model of glomerulosclerosis. Nephrol Dial Transplant 2001; 16:147-50. [PMID: 11209009 DOI: 10.1093/ndt/16.1.147] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Antioxidant enzyme status changes in experimental models of chronic renal disease with glomerulosclerosis. Most of the studies are performed in rats. We now investigate whether a mouse model with more rapid development of glomerulosclerosis is suitable for the study of radical-associated renal disease. METHODS Female BALB/c mice are injected intravenously with a single dose of adriamycin (10 mg/kg). The development of glomerular and interstitial injury is evaluated by means of renal function parameters and histology. Renal cortex activities of catalase, Cu/Zn and Mn superoxide dismutase and glutathione peroxidase are measured by enzymatic techniques, and their mRNA levels by Northern blot analysis. RESULTS The mice develop proteinuria and hypercholesterolaemia; glomerulosclerosis is present 20 days after adriamycin injection. Involvement of reactive oxygen intermediates in the disease process is supported by an increased cortex level of glutathione (1.77+/-0.13 vs 1.31+/-0.12 micromol/g kidney; P = 0.021) and ferric iron deposition in the tubulointerstitial compartment. Glomerulosclerosis and tubulointerstitial lesions are accompanied by decreased cortex activities of catalase (0.19+/-0.01 vs 0.23+/-0.01 U/mg protein; P = 0.024), glutathione peroxidase (0.28+/-0.01 vs 0.32+/-0.01 U/mg protein; P = 0.049) and Mn superoxide dismutase (6.61+/-0.91 vs 9.25+/-0.99 U/mg protein, P = 0.020). We find decreased cortex mRNA levels only for glutathione peroxidase. CONCLUSION The fast development of glomerulosclerosis combined with an altered antioxidant status makes this mouse adriamycin model a suitable alternative for the slower rat models.
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Affiliation(s)
- A Deman
- Department of Human Anatomy, Vrije Universiteit Brussel and Academic Hospital of the Vrije Universiteit Brussel, Brussels, Belgium
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Van den Branden C, Ceyssens B, De Craemer D, Pauwels M, Vanden Houte K, De Bleser P, Hellemans K, Geerts A, Verbeelen D. Renal antioxidant enzymes and fibrosis-related markers in the rat adriamycin model. Nephron Clin Pract 2000; 86:167-75. [PMID: 11014987 DOI: 10.1159/000045736] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Excessive generation of reactive oxygen intermediates can induce changes in the cellular antioxidant defence system. In this study we examine the antioxidant enzyme status and the expression of fibrosis-related marker proteins in the Adriamycin model of chronic renal failure in the rat. Twenty weeks after Adriamycin treatment, rats have overt nephrotic syndrome and renal failure with development of tubulo-interstitial fibrosis and glomerulosclerosis. Lipids accumulate in blood and in both glomeruli and tubulo-interstitial tissue. Desmin and alpha-smooth muscle actin expression increases in glomeruli and in the tubulo-interstitial area. Renal cortex antioxidant enzyme activities are decreased 20 weeks after Adriamycin injection (to 41% for catalase, to 56% for total superoxide dismutase and to 69% for glutathione peroxidase). The mRNA levels of catalase, Cu/Zn-superoxide dismutase and glutathione peroxidase-1 evaluated by Northern blot are decreased by more than 50% for catalase, Cu/Zn-superoxide dismutase and glutathione peroxidase-1. We conclude that in the rat Adriamycin-induced model of chronic renal failure with fibrosis, the combination of decreased antioxidant enzyme status in renal cortex with high concentrations of lipids in blood and renal tissue facilitates oxidative damage. Development of fibrosis is paralleled by increased expression of desmin and alpha-smooth muscle actin.
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Quirynen M, Mongardini C, de Soete M, Pauwels M, Coucke W, van Eldere J, van Steenberghe D. The rôle of chlorhexidine in the one-stage full-mouth disinfection treatment of patients with advanced adult periodontitis. Long-term clinical and microbiological observations. J Clin Periodontol 2000; 27:578-89. [PMID: 10959784 DOI: 10.1034/j.1600-051x.2000.027008578.x] [Citation(s) in RCA: 135] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND/AIMS Recent studies reported significant additional clinical and microbiological improvements when severe adult periodontitis was treated by means of a "one-stage full-mouth" disinfection instead of a standard treatment strategy with consecutive root planings quadrant per quadrant. The one stage full-mouth disinfection procedure involves scaling and root planing of all pockets within 24 h in combination with an extensive application of chlorhexidine to all intra-oral niches such as periodontal pockets, tongue dorsum, tonsils (chairside, and at home for 2 months). This study aims to examine the relative importance of the use of chlorhexidine in the one stage full-mouth disinfection protocol. METHODS Therefore, 3 groups of 12 patients each with advanced periodontitis were followed, both from a clinical and microbiological point of view, over a period of 8 months. The patients from the control group were scaled and root planed, quadrant per quadrant. at two-week intervals. The 2 other groups underwent a one stage full-mouth scaling and root planing (all pockets within 24 h) with (Fdis) or without (FRp=full-mouth root planing) the adjunctive use of chlorhexidine. At baseline and after 1, 2, 4 and 8 months, the following clinical parameters were recorded: plaque and gingivitis indices, probing depth, bleeding on probing and clinical attachment level. Microbiological samples were taken from different intra-oral niches (tongue, mucosa, saliva and pooled samples from single- and multi-rooted teeth). The samples were cultured on selective and non-selective media in order to evaluate the number of CFU/ml for the key-periodontopathogens. At baseline, an anonymous questionnaire was given to the patients to record the perception of each treatment (post operative pain, fever, swelling etc.). RESULTS All 3 treatment strategies resulted in significant improvements for all clinical parameters, but the Fdis and FRp patients reacted always significantly more favourably than the control group, with an additional probing depth reduction of +/- 1.5 mm and an additional gain in attachment of +/- 2 mm (for pockets > or = 7 mm). Also from a microbiological point of view both the FRp and Fdis patients showed additional improvements when compared to the control group, as well in the reduction of spirochetes and motile organisms as in the number of CFU/ml of the key-pathogens, especially when the subgingival plaque samples were considered. The differences between FRp and Fdis patients were negligible. CONCLUSIONS These findings suggest that the benefits of a "one-stage full-mouth disinfection" in the treatment of patients suffering from severe adult periodontitis probably results from the full-mouth scaling and root planing within 24 h rather than the beneficial effect of chlorhexidine. The raise in body temperature the second day after the full-mouth scaling and root planing seems to indicate a Shwartzman reaction.
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Affiliation(s)
- M Quirynen
- Department of Periodontology, Catholic University of Leuven, Belgium.
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Pauwels M, Pauwels S, Capron JP, Sevestre H, Desablens B. [Portal hypertension caused by intra-hepatic block during chronic lymphoid leukemia]. Gastroenterol Clin Biol 2000; 24:221-4. [PMID: 12687964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Portal hypertension in chronic lymphocytic leukemia is rare. A 66 year-old man was admitted for splenomegaly, thrombopenia and cholestasis. Endoscopy showed esophageal varices. The hepatic venous pressure gradient was 15 mmHg. The liver biopsy showed dense leukemia cells in sinusoidal and portal sites. After splenectomy, the hepatic venous pressure gradient normalized, but esophageal varices and cholestasis persisted. The authors discuss the mechanisms of portal hypertension in chronic lymphocytic leukemia. Previously reported cases are summarized.
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Affiliation(s)
- M Pauwels
- Service d'Hépato-Gastroentérologie, Hôpital Nord
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Pauwels M, Lauwers P, Hendriks J, Hubens A, Eyskens E, Hubens G. The effect of CO2 pneumoperitoneum on the growth of a solid colon carcinoma in rats. Surg Endosc 1999; 13:998-1000. [PMID: 10526035 DOI: 10.1007/s004649901155] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND In order to investigate the effect of carbon dioxide (CO(2)) pneumoperitoneum on solid colon carcinomas, we used a colon anastomosis tumor model in 30 male syngeneic WAG rats, which were divided, at random into three groups. METHODS In all rats, 10(6) CC531 S colon carcinoma cells were injected as an enema into the colon. Subsequently, a transection and a reanastomosis of the colon descendens was performed via laparotomy. After 2 weeks, group 1 (n = 10) was anesthetized as an anesthesia control group. Group 2 (n = 10) had a laparotomy that was closed after 20 min. In group 3 (n = 10), a CO(2) pneumoperitoneum of </=6 mmHg was created and maintained during 20 min. After 2 weeks, all rats were killed, and total tumor weight and volume was measured. RESULTS At necroscopy tumor growth was found in 16 rats (group 1: six; group 2: five; group 3: five). No difference in tumor growth (weight or volume) was found between the three groups. CONCLUSION In our solid colon carcinoma model, CO(2) pneumoperitoneum did not enhance tumor growth.
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Affiliation(s)
- M Pauwels
- Laboratory of Experimental Surgery, University of Antwerp, Wilrijkstraat 10, 2650 Edegem, Antwerp, Belgium
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Quirynen M, Mongardini C, Pauwels M, Bollen CM, Van Eldere J, van Steenberghe D. One stage full- versus partial-mouth disinfection in the treatment of chronic adult or generalized early-onset periodontitis. II. Long-term impact on microbial load. J Periodontol 1999; 70:646-56. [PMID: 10397520 DOI: 10.1902/jop.1999.70.6.646] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Recent studies showed the clinical benefits of a one stage full-mouth disinfection, when compared to the worldwide standard treatment strategy of consecutive root planings per quadrant without proper disinfection of the remaining intraoral niches. The purpose of this study was to investigate the microbiological benefits of such a one stage full-mouth disinfection with special attention to all intraoral niches for periodontopathogens and to evaluate the perception by the patients of the new treatment strategy. METHODS Sixteen patients with early-onset periodontitis and 24 patients with severe adult periodontitis were randomly assigned to test and control groups. The control group was scaled and root planed, per quadrant, at 2-week intervals and given oral hygiene instructions. The test group received the one stage full-mouth disinfection treatment. At baseline and after 1, 2, 4, and 8 months, microbiological samples were taken from all niches (tongue, mucosa, saliva, and pooled samples from single- and multi-rooted teeth). The samples were cultured on selective and non-selective media. Patient perception of the treatment was evaluated using a questionnaire. RESULTS In comparison to the standard therapy, the one stage full-mouth disinfection resulted in significant additional microbial improvements. The test group showed larger reductions in the proportions of spirochetes and motile organisms in the subgingival flora, and more significant reductions in the density of key pathogens, with even the eradication of P. gingivalis. The beneficial effects in the other niches were primarily restricted to the number of colony-forming units/ml of black-pigmented bacteria, especially on the mucosa and in the saliva and to a lesser extent on the tongue. Both treatments were well tolerated by the patients and the overall severity rating for both therapies was comparable, although 4 quadrants were treated within 24 hours in the test group versus only 1 in the control group. The full-mouth disinfection approach resulted more frequently in a slight increase of body temperature, especially after the second day. CONCLUSIONS These findings support the benefit of a one stage full-mouth disinfection in the treatment of patients with either chronic adult or early-onset periodontitis.
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Affiliation(s)
- M Quirynen
- Department of Periodontology, Faculty of Medicine, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, Belgium.
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Quirynen M, Van Eldere J, Pauwels M, Bollen CM, van Steenberghe D. In vitro volatile sulfur compound production of oral bacteria in different culture media. Quintessence Int 1999; 30:351-6. [PMID: 10635291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
OBJECTIVE The purpose of this study was to detect the relative contribution of Porphyromonas gingivalis, Fusobacterium nucleatum, and Prevotella intermedia in the production of oral malodor. METHOD AND MATERIALS The volatile sulfur compounds produced by these bacteria in vitro were measured semiquantitatively by a portable sulfide monitor. RESULTS Samples from the tongue, tonsils, and pharynx showed a significantly higher production (550 ppb) of volatile sulfur compounds during the first 6 hours after anaerobic incubation in broths (brain-heart infusion, Columbia, and Trypticase Soy) than after incubation in agar media (300 ppb) (P < 0.001). After 24 hours, values in broths and agars leveled off at 350 ppb (P = 0.3) and remained constant during the next 6 days. Measurement of separate pure cultures showed that maximal volatile sulfur compound production was reached 6 hours after incubation (450 ppb for the 3 bacteria). Higher volatile sulfur compound values were measured in brain-heart infusion. When measurements of mixed cultures of the 3 pathogens were performed every 15 minutes, the maximal value was reached after only 30 minutes of incubation (nearly 500 ppb). CONCLUSION The in vitro volatile sulfur compound production of oral samples is preferably measured in broths. Maximal sulfur production from mixed cultures is reached after 30 minutes of incubation. Samples should always be inoculated at the same dilution.
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Affiliation(s)
- M Quirynen
- Department of Periodontology, Faculty of Medicine, Catholic University Leuven, Belgium
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Abstract
OBJECTIVE Despite technical difficulties due to mediastinal fibrosis, repeat mediastinoscopy can be a valuable tool in the restaging of lung cancer. It provides essential pathological information on mediastinal invasion when selecting patients for surgical resection after induction chemotherapy in stage IIIa disease. The aim of our study was to evaluate the feasibility, sensitivity and accuracy of repeat mediastinoscopy. METHODS From 1994 to 1997 we performed a repeat mediastinoscopy in 15 patients (13 men, two women) with bronchogenic carcinoma. Their age ranged from 49 to 75 years. (mean 64.7). Seven patients had induction chemotherapy for a non-small cell bronchogenic carcinoma with positive N2 nodes on mediastinoscopy. Four patients had a second primary contralateral lung cancer, one had a locoregional recurrence of bronchogenic carcinoma. The other three had a first mediastinoscopy for other reasons than lung cancer, repeat mediastinoscopy being performed for staging of malignant disease. RESULTS In all 15 patients it was possible to perform a complete repeat mediastinoscopy. In one patient repeat mediastinoscopy turned out to be false negative, so, in our series, sensitivity was 87.5%, specificity 100% and accuracy 93.7%. CONCLUSION Previous mediastinoscopy is no contraindication for a repeat one. Repeat mediastinoscopy offers valuable pathological information in restaging of lung cancer.
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Affiliation(s)
- M Pauwels
- Department of Surgery, Antwerp University Hospital, Edegem, Belgium
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De Craemer D, Van den Branden C, Pauwels M, Vamecq J. Peroxisome-proliferating effects of fenoprofen in mice. Lipids 1998; 33:539-43. [PMID: 9625603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report on hepatic effects obtained in vivo by treating mice with different doses of fenoprofen, an arylpropionic acid previously shown to inhibit in vitro peroxisomal very long chain fatty acid oxidation. A strong and dose-related induction of peroxisomal palmitoyl-CoA oxidase, and of carnitine acyltransferase and acyl-CoA hydrolase activities was recorded in liver homogenates of mice fed diets supplemented with different contents [0.01, 0.05, 0.1, or 1% (w/w)] of fenoprofen for 6 d. Peroxisomal glycolate oxidase and mitochondrial butyryl-CoA, octanoyl-CoA, and palmitoyl-CoA dehydrogenases were unaffected or increased. Hepatic catalase activity was significantly increased in mice fed the diet with 0.05 and 0.1% fenoprofen but, surprisingly, was not stimulated in mice fed the 1% fenoprofen-containing diet. A time-related but unequal induction of acyl-CoA oxidases and catalase was observed with the 0.1% fenoprofen diet: at 21 d of treatment, the induction of lignoceroyl-CoA and palmitoyl-CoA oxidase activities were five-fold stronger than that of catalase activity. In mice treated with 1% fenoprofen for up to 6 d, only acyl-CoA oxidase activities were found to be significantly increased. Morphometric analysis of the liver peroxisomes in mice treated with 0.1% fenoprofen evidenced an increase in size, volume density, and surface density along with a reduced ratio between perimeter and area of the peroxisomal profiles. No morphological marker for very long chain fatty acid deposition could be detected in livers from fenoprofen-treated animals. Our findings clearly demonstrate that fenoprofen acts as a peroxisome proliferator in the liver of mice and do not support the occurrence of in vivo reduction of very long chain fatty acid oxidation in liver from treated animals.
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Affiliation(s)
- D De Craemer
- Menselijke Anatomie & Embryologie, Vrije Universiteit Brussel, Belgium
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Pauwels M, Duchmann JC, Yzet T, Capron JP. [Duodenal hematoma, acute pancreatitis, and hemoperitoneum after endoscopic hemostasis for duodenal ulcer]. Gastroenterol Clin Biol 1998; 22:462-4. [PMID: 9762277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Therapeutic endoscopy is followed by complications in less than 5% of cases. We report a case of an intramural duodenal hematoma after local endoscopic injection of 28 mL of adrenaline 1/10,000 for a bleeding duodenal peptic ulcer. This hematoma was associated with acute pancreatitis and was revealed by a hemoperitoneum.
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Affiliation(s)
- M Pauwels
- Service d'Hépato-Gastroentérologie, CHU Nord, Amiens
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De Craemer D, Pauwels M, Van den Branden C. Morphological adaptations of human liver peroxisomes in cholestasis. APMIS 1998; 106:339-44. [PMID: 9531968 DOI: 10.1111/j.1699-0463.1998.tb01355.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Part of the bile acid synthesis takes place in peroxisomes. An altered enterohepatic circulation of bile acids might influence peroxisomal beta-oxidation enzymes and peroxisomal morphology. We performed a morphological and morphometric investigation of peroxisomes in liver biopsy samples of eight patients with cholestasis of different origin: graft versus host reaction (n = 1), obstruction of the bile flow (n = 3), and drug-induced cholestatic hepatitis (n = 4). Peroxisomes were identified using catalase cytochemistry. They were regularly shaped and showed individual differences in electron density. A perinuclear distribution was observed in a variable number of hepatocytes in each sample. Morphometric analysis of peroxisomes revealed an increase in numerical density and surface density in all, and a decreased mean diameter in four liver samples. Based on previously obtained data in experimental animals, we hypothesize that the observed alterations in peroxisomal morphology indicate an enhanced metabolic activity of the enzymes in the peroxisomal matrix. Among them are enzymes involved in bile acid synthesis.
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Affiliation(s)
- K De Smet
- Department of Toxicology, Vrije Universiteit Brussel, Belgium
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Beken S, Pauwels M, Pahernik S, Koebe HG, Vercruysse A, Rogiers V. Collagen gel sandwich and immobilization cultures of rat hepatocytes: Problems encountered in expressing glutathione S-transferase activities. Toxicol In Vitro 1997; 11:741-52. [DOI: 10.1016/s0887-2333(97)00036-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/1997] [Indexed: 10/17/2022]
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Affiliation(s)
- M Pauwels
- Service d'Hépato-Gastroentérologie, Hôpital Nord, Amiens, France
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Pauwels M, Van Schil P, Van Meerbeeck J, De Backer W, Van den Brande F. 906 Remediastinoscopy in repeat staging of lung cancer. Lung Cancer 1997. [DOI: 10.1016/s0169-5002(97)80286-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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