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Campedel L, Compérat E, Cancel-Tassin G, Varinot J, Pfister C, Delcourt C, Gobet F, Roumiguié M, Patard PM, Daniel G, Bigot P, Carrouget J, Eymerit C, Larré S, Léon P, Durlach A, Ruffion A, de Mazancourt ES, Decaussin-Petrucci M, Bessède T, Lebacle C, Ferlicot S, Robert G, Vuong NS, Philip M, Crouzet S, Matillon X, Mège-Lechevallier F, Lang H, Mouracade P, Lindner V, Gougis P, Cussenot O, Rouprêt M, Seisen T. Prognostic value of programmed death ligand-1 and programmed death-1 expression in patients with upper tract urothelial carcinoma. BJU Int 2023; 132:581-590. [PMID: 37488983 DOI: 10.1111/bju.16129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
OBJECTIVE To evaluate the prognostic value of programmed death ligand-1 (PD-L1) and programmed death-1 (PD-1) expression in patients with upper tract urothelial carcinoma (UTUC). PATIENTS AND METHODS A retrospective multicentre study was conducted in 283 patients with UTUC treated with radical nephroureterectomy (RNU) between 2000 and 2015 at 10 French hospitals. Immunohistochemistry analyses were performed using 2 mm-core tissue microarrays with NAT105® and 28.8® antibodies at a 5% cut-off for positivity on tumour cells and tumour-infiltrating lymphocytes to evaluate PD-L1 and PD-1 expression, respectively. Multivariable Cox regression models were used to determine the independent predictors of recurrence-free (RFS), cancer-specific (CSS) and overall survival (OS). RESULTS Overall, 63 (22.3%) and 220 (77.7%) patients with UTUC had PD-L1-positive and -negative disease, respectively, while 91 (32.2%) and 192 (67.8%) had PD-1-positive and -negative disease, respectively. Patients who expressed PD-L1 or PD-1 were more likely to have pathological tumour stage ≥pT2 (68.3% vs 49.5%, P = 0.009; and 69.2% vs 46.4%, P < 0.001, respectively) and high-grade (90.5% vs 70.0%, P = 0.001; and 91.2% vs 66.7%, P < 0.001, respectively) disease with lymphovascular invasion (52.4% vs 17.3%, P < 0.001; and 39.6% vs 18.2%, P < 0.001, respectively) as compared to those who did not. In multivariable Cox regression analysis adjusting for each other, PD-L1 and PD-1 expression were significantly associated with decreased RFS (hazard ratio [HR] 1.83, 95% confidence interval [CI] 1.09-3.08, P = 0.023; and HR 1.59, 95% CI 1.01-2.54, P = 0.049; respectively), CSS (HR 2.73, 95% CI 1.48-5.04, P = 0.001; and HR 1.96, 95% CI 1.12-3.45, P = 0.019; respectively) and OS (HR 2.08, 95% CI 1.23-3.53, P = 0.006; and HR 1.71, 95% CI 1.05-2.78, P = 0.031; respectively). In addition, multivariable Cox regression analyses evaluating the four-tier combination of PD-L1 and PD-1 expression showed that only PD-L1/PD-1-positive patients (n = 38 [13.4%]) had significantly decreased RFS (HR 3.07, 95% CI 1.70-5.52; P < 0.001), CSS (HR 5.23, 95% CI 2.62-10.43; P < 0.001) and OS (HR 3.82, 95% CI 2.13-6.85; P < 0.001) as compared to those with PD-L1/PD-1-negative disease (n = 167 [59.0%]). CONCLUSIONS We observed that PD-L1 and PD-1 expression were both associated with adverse pathological features that translated into an independent and cumulative adverse prognostic value in UTUC patients treated with RNU.
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Affiliation(s)
- Luca Campedel
- Department of Medical Oncology, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
- GRC n°5, Predictive Onco-Urology, Sorbonne Université, Paris, France
| | - Eva Compérat
- GRC n°5, Predictive Onco-Urology, Sorbonne Université, Paris, France
- Departement of Pathology, Tenon Hospital, AP-HP, Paris, France
| | - Géraldine Cancel-Tassin
- GRC n°5, Predictive Onco-Urology, Sorbonne Université, Paris, France
- CeRePP, Tenon Hospital, Paris, France
| | - Justine Varinot
- Departement of Pathology, Tenon Hospital, AP-HP, Paris, France
| | | | | | | | | | | | | | - Pierre Bigot
- Department of Urology, Angers Hospital, Angers, France
| | | | | | | | | | - Anne Durlach
- Department of Pathology, Reims Hospital, Reims, France
| | | | | | | | - Thomas Bessède
- Department of Urology, Kremlin-Bicêtre Hospital, Le Kremlin-Bicêtre, France
| | - Cédric Lebacle
- Department of Urology, Kremlin-Bicêtre Hospital, Le Kremlin-Bicêtre, France
| | - Sophie Ferlicot
- Department of Pathology, Kremlin-Bicêtre Hospital, Le Kremlin-Bicêtre, France
| | | | - Nam-Son Vuong
- Department of Urology, Bordeaux Hospital, Bordeaux, France
| | - Magali Philip
- Department of Pathology, Bordeaux Hospital, Bordeaux, France
| | | | | | | | - Hervé Lang
- Department of Urology, Strasbourg Hospital, Strasbourg, France
| | | | | | - Paul Gougis
- Department of Medical Oncology, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - Olivier Cussenot
- GRC n°5, Predictive Onco-Urology, Sorbonne Université, Paris, France
- CeRePP, Tenon Hospital, Paris, France
- Department of Urology, Tenon Hospital, APHP, Paris, France
| | - Morgan Rouprêt
- GRC n°5, Predictive Onco-Urology, Sorbonne Université, Paris, France
- Department of Urology, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - Thomas Seisen
- GRC n°5, Predictive Onco-Urology, Sorbonne Université, Paris, France
- Department of Urology, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
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Joshi P, Cora F, Daniel G, Apurva A, Rateesh R, Shreayas B, Sanjay K. Glans resurfacing for lichen sclerosus. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01353-2] [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: 02/12/2023]
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Breijaert T, Daniel G, Hedlund D, Svedlindh P, Kessler V, Granberg H, Håkansson K, Seisenbaeva G. Self-assembly of ferria – nanocellulose composite fibres. Carbohydr Polym 2022; 291:119560. [DOI: 10.1016/j.carbpol.2022.119560] [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] [Received: 02/18/2022] [Revised: 04/12/2022] [Accepted: 04/28/2022] [Indexed: 11/25/2022]
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Clarke E, Levien AS, Bennett RA, Perry S, Daniel G. Clinical utility of liver biopsies in dogs undergoing splenectomy. J Small Anim Pract 2020; 61:684-688. [PMID: 33035380 DOI: 10.1111/jsap.13202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 05/25/2020] [Accepted: 06/22/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To determine the prevalence of neoplasia detected on liver biopsy obtained at the time of splenectomy in dogs with splenic masses. MATERIALS AND METHODS Retrospective study of medical records of dogs with splenic masses from which liver biopsies were taken following splenectomy. RESULTS Malignant splenic neoplasia was detected in 50 of 113 (44.2%) of the dogs undergoing splenectomy. Neoplastic liver disease was detected on biopsy from 1 of 40 (2.5%) dogs with a grossly normal liver and from 20 of 69 (28.9%) dogs with a grossly abnormal liver. Dogs with a grossly abnormal liver had a ~ 16 times (95% CI: 2.5-170) higher chance of being diagnosed with liver neoplasia on biopsy. Haemoabdomen was also associated with an increased likelihood of liver neoplasia on biopsy at the time of splenectomy. CLINICAL SIGNIFICANCE A liver biopsy taken from grossly normal liver is a low-yield diagnostic test but liver biopsy is recommended following splenectomy if the liver appears abnormal at surgery.
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Affiliation(s)
- E Clarke
- Louisiana State University Veterinary Teaching Hospital, Skip Bertman Drive, Baton Rouge, LA, 70803, USA
| | - A S Levien
- The Animal Medical Center, 510 E 62nd St. New York, NY, 10065, USA.,Veterinary Specialists of Sydney, PO BOX 197, Padstow, NSW, 2211, Australia
| | - R A Bennett
- Louisiana State University Veterinary Teaching Hospital, Skip Bertman Drive, Baton Rouge, LA, 70803, USA.,The Animal Medical Center, 510 E 62nd St. New York, NY, 10065, USA
| | - S Perry
- Louisiana State University Veterinary Teaching Hospital, Skip Bertman Drive, Baton Rouge, LA, 70803, USA
| | - G Daniel
- The Animal Medical Center, 510 E 62nd St. New York, NY, 10065, USA.,Friendship Hospital for Animals, 4105 Brandywine St NW, Washington, DC, 20016, USA
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Weyl A, Chantalat E, Daniel G, Bordier B, Chaynes P, Doumerc N, Malavaud B, Vaysse C, Roumiguié M. Transvaginal minimally invasive approach: An update on safety from an anatomical, anatomopathological and clinical point of view. J Gynecol Obstet Hum Reprod 2020; 50:101941. [PMID: 33045446 DOI: 10.1016/j.jogoh.2020.101941] [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] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/05/2020] [Accepted: 10/07/2020] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The aim of this work was to analyze the transvaginal approach in minimally invasive surgery in terms of anatomical, histopathological and functional characteristics, to show the safety of this surgical approach. METHODS Anatomical study was first conducted by dissection on fresh cadavers of adult women in order to measure the distance between the vaginal incision and the ureters, rectum and hypogastric nerves. In parallel, an anatomopathological study detailed and compared the macroscopic and histological characteristics of the anterior and posterior surfaces of vaginal samples obtained from cadavers and patients in the context of a hysterectomy for benign pathology. Finally, patients who underwent a transvaginal approach nephrectomy or transplantation were retrospectively enrolled for a clinical examination and an evaluation of their sexuality. RESULTS The anatomical study conducted on seventeen cadavers showed that the posterior vaginal fornix was remote from the major structures of the pelvis such as rectum, ureters, hypogastric plexus, which allowed a safe incision. Mechanical tests further demonstrated that the posterior vaginal fornix was more extensible than the anterior and histological features showed no major vascular or nervous structures. Ten patients were included in the retrospective clinical study. Long-term follow up showed no negative impact on the texture of the vagina or satisfaction from sexual intercourse. CONCLUSIONS Anatomical, histological and functional data supported that transvaginal approach by posterior vagina fornix incision is a minimally invasive surgery that can be performed safely and effectively by a skilled surgeon in cases with a specific surgical indication for this approach.
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Affiliation(s)
- Ariane Weyl
- Department of Gynecologic Surgery, University Hospital of Toulouse Rangueil, 1 Avenue du Professeur Jean Poulhès, 31400, Toulouse, France; Department of Anatomy, Université Paul Sabatier Toulouse III, 133 route de Narbonne, 31400, Toulouse, France.
| | - Elodie Chantalat
- Department of Gynecologic Surgery, University Hospital of Toulouse Rangueil, 1 Avenue du Professeur Jean Poulhès, 31400, Toulouse, France; Department of Anatomy, Université Paul Sabatier Toulouse III, 133 route de Narbonne, 31400, Toulouse, France
| | - Gwendoline Daniel
- Department of Anatomopathology, Institut Universitaire du cancer de Toulouse Oncopole, 1 av Irene Joliot-Curie, 31100, Toulouse, France
| | - Benoît Bordier
- Department of Urology, Clinique Pasteur, 45 avenue de Lombez, 31300, Toulouse, France
| | - Patrick Chaynes
- Department of Anatomy, Université Paul Sabatier Toulouse III, 133 route de Narbonne, 31400, Toulouse, France
| | - Nicolas Doumerc
- Department of Urology, University Hospital of Toulouse Rangueil, 1 Avenue du Professeur Jean Poulhès, 31400, Toulouse, France
| | - Bernard Malavaud
- Department of Urology, University Hospital of Toulouse Rangueil, 1 Avenue du Professeur Jean Poulhès, 31400, Toulouse, France; Department of Anatomy, Université Paul Sabatier Toulouse III, 133 route de Narbonne, 31400, Toulouse, France
| | - Charlotte Vaysse
- Department of Gynecologic Surgery, University Hospital of Toulouse Rangueil, 1 Avenue du Professeur Jean Poulhès, 31400, Toulouse, France
| | - Mathieu Roumiguié
- Department of Urology, University Hospital of Toulouse Rangueil, 1 Avenue du Professeur Jean Poulhès, 31400, Toulouse, France; Department of Anatomy, Université Paul Sabatier Toulouse III, 133 route de Narbonne, 31400, Toulouse, France
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Chaufour X, Segal J, Soler R, Daniel G, Rosset E, Favre JP, Magnan PE, Ricco J. Durability of Open Repair of Juxtarenal Abdominal Aortic Aneurysms: A Multicentre Retrospective Study in Five French Academic Centres. J Vasc Surg 2020. [DOI: 10.1016/j.jvs.2019.12.011] [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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Daniel G, Limousin O, Maier D, Meuris A, Carrel F. Compton imaging reconstruction methods: a comparative performance study of direct back-projection, SOE, a new Bayesian algorithm and a new Compton inversion method applied to real data with Caliste. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202022506006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Compton imaging is one of the main methods to localize radioactive hotspots, which emit high-energy gamma-ray photons, above 200 keV. Most of the Compton imaging systems are composed by at least two detection layers or one 3D position sensitive detector. In this study, we demonstrate the application of a new miniature pixelated single plane detector to Compton imaging. In this configuration, we do not have the information on interaction depth but we successfully test its ability to perform Compton localization by means of comparing different Compton reconstruction algorithms applied to real data measured with our single plane detection system.
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Malavaud B, Daniel G, Ranty ML. Comment on "Prognostic pathological factors in radical cystectomy after neoadjuvant chemotherapy". Histopathology 2018; 74:530-532. [PMID: 30291642 DOI: 10.1111/his.13766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bernard Malavaud
- Urology Department, Institut Universitaire du Cancer-Oncopole, University Hospital, Toulouse, France
| | - Gwendoline Daniel
- Pathology and Cytology Department, Institut Universitaire du Cancer-Oncopole, University Hospital, Toulouse, France
| | - Marie-Laure Ranty
- Pathology and Cytology Department, Institut Universitaire du Cancer-Oncopole, University Hospital, Toulouse, France
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Meilleroux J, Daniel G, Aziza J, d'Aure DM, Quintyn-Ranty ML, Basset CML, Evrard SM, Courtade-Saidi MM. One year of experience using the Paris System for Reporting Urinary Cytology. Cancer Cytopathol 2018; 126:430-436. [DOI: 10.1002/cncy.21999] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/05/2018] [Accepted: 03/22/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Julie Meilleroux
- Department of Pathology and Cytology; University Cancer Institute Toulouse Oncopole; Toulouse France
| | - Gwendoline Daniel
- Department of Pathology and Cytology; University Cancer Institute Toulouse Oncopole; Toulouse France
| | - Jacqueline Aziza
- Department of Pathology and Cytology; University Cancer Institute Toulouse Oncopole; Toulouse France
| | - Dominique M. d'Aure
- Department of Pathology and Cytology; University Cancer Institute Toulouse Oncopole; Toulouse France
| | - Marie-Laure Quintyn-Ranty
- Department of Pathology and Cytology; University Cancer Institute Toulouse Oncopole; Toulouse France
| | - Céline ML. Basset
- Department of Pathology and Cytology; University Cancer Institute Toulouse Oncopole; Toulouse France
| | - Solène M. Evrard
- Department of Pathology and Cytology; University Cancer Institute Toulouse Oncopole; Toulouse France
| | - Monique M. Courtade-Saidi
- Department of Pathology and Cytology; University Cancer Institute Toulouse Oncopole; Toulouse France
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Acosta Santamaría VA, Daniel G, Perrin D, Albertini JN, Rosset E, Avril S. Model reduction methodology for computational simulations of endovascular repair. Comput Methods Biomech Biomed Engin 2018; 21:139-148. [DOI: 10.1080/10255842.2018.1427740] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- V. A. Acosta Santamaría
- SaInBioSE, INSERM, U1059, Saint Etienne, France
- SaInBioSE, Mines Saint-Etienne, Saint Etienne, France
- SaInBioSE, Université de Lyon, Saint Etienne, France
| | - G. Daniel
- SaInBioSE, INSERM, U1059, Saint Etienne, France
- SaInBioSE, Mines Saint-Etienne, Saint Etienne, France
- SaInBioSE, Université de Lyon, Saint Etienne, France
- Service de Chirurgie Vasculaire, Centre Hospitalier Régional Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - D. Perrin
- SaInBioSE, INSERM, U1059, Saint Etienne, France
- SaInBioSE, Mines Saint-Etienne, Saint Etienne, France
- SaInBioSE, Université de Lyon, Saint Etienne, France
| | - J. N. Albertini
- SaInBioSE, INSERM, U1059, Saint Etienne, France
- SaInBioSE, Université de Lyon, Saint Etienne, France
- Service de Chirurgie Vasculaire, Centre Hospitalier Universitaire de Saint-Etienne, Saint Etienne, France
| | - E. Rosset
- SaInBioSE, INSERM, U1059, Saint Etienne, France
- Service de Chirurgie Vasculaire, Centre Hospitalier Régional Universitaire de Clermont-Ferrand, Clermont-Ferrand, France
| | - S. Avril
- SaInBioSE, INSERM, U1059, Saint Etienne, France
- SaInBioSE, Mines Saint-Etienne, Saint Etienne, France
- SaInBioSE, Université de Lyon, Saint Etienne, France
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Evrard SM, Meilleroux J, Daniel G, Basset C, Lacoste-Collin L, Vergez S, Uro-Coste E, Courtade-Saidi M. Use of fluorescent in-situ hybridisation in salivary gland cytology: A powerful diagnostic tool. Cytopathology 2017; 28:312-320. [PMID: 28503786 DOI: 10.1111/cyt.12427] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Salivary gland cytology is challenging because it includes a diversity of lesions and a wide spectra of tumours. Recently, it has been reported that many types of salivary gland tumours have specific molecular diagnostic signatures that could be identified by fluorescent in-situ hybridisation (FISH). The aim of the present study was to demonstrate the feasibility and efficiency of FISH on routine cytological salivary gland smears. METHODS FISH was conducted on 37 cytological salivary gland smears from 34 patients. According to the cytological diagnosis suspected, MECT1/MAML2 gene fusion and rearrangements of PLAG1, MYB, or ETV6 were analysed. The presence and percentages of cells that had gene rearrangements were evaluated. Results were compared with the histological surgical samples, available from 26 patients. RESULTS The PLAG1 rearrangement was observed in 12/20 (60%) cases of pleomorphic adenoma. MECT1/MAML2 gene fusion was observed in 1:2 mucoepidermoid carcinomas but was not observed in five other tumours (two pleomorphic adenomas, one Warthin's tumour, one mammary analogue secretory carcinoma [MASC] and one cystic tumour). MYB rearrangement was observed in 4/4 adenoid cystic carcinomas. ETV6-gene splitting identified one MASC. CONCLUSION Overall, FISH had a specificity of 100% and a sensitivity of 66.7%. When FISH and cytological analyses were combined, the overall sensitivity was increased to 93.3%. It can thus be concluded that when the FISH analysis is positive, the extent of surgery could be determined with confidence pre-operatively without needing a diagnosis from a frozen section.
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Affiliation(s)
- S M Evrard
- Rangueil Medical School, Histology and Embryology, Toulouse III Paul Sabatier University, Toulouse Cedex, France.,Pathology and Cytology Department, CHU Toulouse, IUCT Oncopole, Toulouse Cedex 9, France
| | - J Meilleroux
- Pathology and Cytology Department, CHU Toulouse, IUCT Oncopole, Toulouse Cedex 9, France
| | - G Daniel
- Pathology and Cytology Department, CHU Toulouse, IUCT Oncopole, Toulouse Cedex 9, France
| | - C Basset
- Rangueil Medical School, Histology and Embryology, Toulouse III Paul Sabatier University, Toulouse Cedex, France.,Pathology and Cytology Department, CHU Toulouse, IUCT Oncopole, Toulouse Cedex 9, France
| | - L Lacoste-Collin
- Rangueil Medical School, Histology and Embryology, Toulouse III Paul Sabatier University, Toulouse Cedex, France.,Pathology and Cytology Department, CHU Toulouse, IUCT Oncopole, Toulouse Cedex 9, France
| | - S Vergez
- Otolaryngology Department, Head and Neck Surgery, CHU Toulouse, Larrey Hospital, Toulouse Cedex 9, France.,Otolaryngology Department, Head and Neck Surgery, CHU Toulouse, IUCT Oncopole, Toulouse Cedex 9, France.,Rangueil Medical School, Toulouse III Paul Sabatier University, Toulouse Cedex, France
| | - E Uro-Coste
- Rangueil Medical School, Histology and Embryology, Toulouse III Paul Sabatier University, Toulouse Cedex, France.,Rangueil Medical School, Toulouse III Paul Sabatier University, Toulouse Cedex, France
| | - M Courtade-Saidi
- Rangueil Medical School, Histology and Embryology, Toulouse III Paul Sabatier University, Toulouse Cedex, France.,Pathology and Cytology Department, CHU Toulouse, IUCT Oncopole, Toulouse Cedex 9, France
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Veziant J, Antomarchi O, Pezet D, Daniel G, Le Roy B. Laparoscopic distal gastrectomy with type D2 lymphadenectomy for adenocarcinoma (hybrid procedure) (with video). J Visc Surg 2017; 154:135-136. [PMID: 28395957 DOI: 10.1016/j.jviscsurg.2017.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- J Veziant
- Department of Digestive Surgery, Estaing hospital, CHU Clermont-Ferrand, 1, place Lucie-et-Raymond-Aubrac, 63003 Clermont-Ferrand, France
| | - O Antomarchi
- Department of Digestive Surgery, Estaing hospital, CHU Clermont-Ferrand, 1, place Lucie-et-Raymond-Aubrac, 63003 Clermont-Ferrand, France
| | - D Pezet
- Department of Digestive Surgery, Estaing hospital, CHU Clermont-Ferrand, 1, place Lucie-et-Raymond-Aubrac, 63003 Clermont-Ferrand, France
| | - G Daniel
- Department of Digestive Surgery, Estaing hospital, CHU Clermont-Ferrand, 1, place Lucie-et-Raymond-Aubrac, 63003 Clermont-Ferrand, France
| | - B Le Roy
- Department of Digestive Surgery, Estaing hospital, CHU Clermont-Ferrand, 1, place Lucie-et-Raymond-Aubrac, 63003 Clermont-Ferrand, France.
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Covin B, Daniel G, Beauval J, Quintyn M, Soulié M, Malavaud B, Roumiguié M. Résultats d’une expérience de la résection transurétrale de vessie en-bloc : à propos de 30 patients. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Daniel G, Quintyn-Ranty M, Meilleroux J, Brousset P, Roumiguié M, Malavaud B. RTV monobloc versus RTV conventionnelle : le point de vue du pathologiste. Étude comparative rétrospective. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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15
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Daniel G, Hancox A, Field M, Thumbe V. Auditing audits: Meaningful or just mandatory? Int J Surg 2015. [DOI: 10.1016/j.ijsu.2015.07.443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Knapstein J, Fuchs P, Daniel G, Darstein F, Marquardt J, Sprinzl M, Schattenberg J, Wörns MA, Lautem A, Hoppe-Lotichius M, Lang H, Galle PR, Zimmermann T. Relevance of organic cation transporter OCT1 (SLC22A1) in Diethylnitrosamine-initiated and Phenobarbital-promoted hepatocellular carcinoma in OCT3- knockout mice. Z Gastroenterol 2015. [DOI: 10.1055/s-0034-1397195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Cleary MR, Andersson PF, Broberg A, Elfstrand M, Daniel G, Stenlid J. Genotypes of Fraxinus excelsior with different susceptibility to the ash dieback pathogen Hymenoscyphus pseudoalbidus and their response to the phytotoxin viridiol - a metabolomic and microscopic study. Phytochemistry 2014; 102:115-25. [PMID: 24709032 DOI: 10.1016/j.phytochem.2014.03.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 11/07/2013] [Revised: 03/03/2014] [Accepted: 03/06/2014] [Indexed: 05/26/2023]
Abstract
Eight European ash (Fraxinus excelsior) genotypes with different known susceptibility to Hymenoscyphus pseudoalbidus were tested against the phytotoxin viridiol and their response described at the microscopic and metabolomic level. All ash genotypes were sensitive to the toxin and necrosis was detectable after 24h. Among the three viridiol concentrations used in the experiment, the lowest concentration (14.7μM) yielded markedly lower mean damage scores compared to those resulting from seedlings tested at higher dosages. The highest damage scores were associated with the susceptible ash clones S-101, S-106 and S-125, but also with resistant clone R-104. Three resistant clones (R-131, R-121, and R-118) had lower mean damage scores compared to susceptible clones. Wilting of leaves was more common 48h after treatment and more pronounced on seedlings with high damage scores. The resulting lesions generally lacked browning of tissue and displayed only surface disruption of cells in direct contact with the toxin. A delay in symptom development was evident on all five resistant clones tested with the two higher concentrations of viridiol. LC-HRMS and MS/MS analyses of ash seedling extracts suggest several secoiridoid compounds as well as compounds related to abscisic acid (ABA) to be produced in response to viridiol. ABA-cysteine and xanthoxin were found at significantly higher concentrations in susceptible clones compared to resistant clones after treatment with viridiol, suggesting a primary role of ABA in response to stress. The results observed in this study suggest that genetic resistance to H. pseudoalbidus among ash genotypes may be explained, in part, by the varied response to phytotoxins produced by the fungus.
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Affiliation(s)
- M R Cleary
- Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Almas allé 5, PO Box 7026, SE-750 07 Uppsala, Sweden.
| | - P F Andersson
- Department of Chemistry and Biotechnology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Almas allé 5, PO Box 7015, SE-750 07 Uppsala, Sweden
| | - A Broberg
- Department of Chemistry and Biotechnology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Almas allé 5, PO Box 7015, SE-750 07 Uppsala, Sweden
| | - M Elfstrand
- Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Almas allé 5, PO Box 7026, SE-750 07 Uppsala, Sweden
| | - G Daniel
- Department of Forest Products, Swedish University of Agricultural Sciences, Vallvägen 9C, PO Box 7008, 750-07 Uppsala, Sweden
| | - J Stenlid
- Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Almas allé 5, PO Box 7026, SE-750 07 Uppsala, Sweden
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Bernard D, Kwabena A, Osei O, Daniel G, Elom S, Sandra A. The Effect of Different Drying Methods on the Phytochemicals and Radical Scavenging Activity of Ceylon Cinnamon (Cinnamomum zeylanicum) Plant Parts. ACTA ACUST UNITED AC 2014. [DOI: 10.9734/ejmp/2014/11990] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pogorilyi RP, Melnyk IV, Zub YL, Carlson S, Daniel G, Svedlindh P, Seisenbaeva GA, Kessler VG. New product from old reaction: uniform magnetite nanoparticles from iron-mediated synthesis of alkali iodides and their protection from leaching in acidic media. RSC Adv 2014. [DOI: 10.1039/c4ra02217c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Magnetic material stable to acid leaching was produced by silica coating of byproduct from the industrial synthesis of alkali iodides.
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Affiliation(s)
- R. P. Pogorilyi
- Chuiko Institute of Surface Chemistry
- National Academy of Sciences of Ukraine
- Kyiv 03164, Ukraine
| | - I. V. Melnyk
- Chuiko Institute of Surface Chemistry
- National Academy of Sciences of Ukraine
- Kyiv 03164, Ukraine
| | - Y. L. Zub
- Chuiko Institute of Surface Chemistry
- National Academy of Sciences of Ukraine
- Kyiv 03164, Ukraine
| | - S. Carlson
- MAX IV Laboratory
- Lund University
- 22100 Lund, Sweden
| | - G. Daniel
- Department of Forest Products
- Swedish University of Agricultural Sciences
- 75007 Uppsala, Sweden
| | - P. Svedlindh
- Solid State Physics
- Department of Engineering
- Uppsala University
- SE-751 21 Uppsala, Sweden
| | - G. A. Seisenbaeva
- Department of Chemistry and Biotechnology
- Swedish University of Agricultural Sciences
- 750 07 Uppsala, Sweden
| | - V. G. Kessler
- Department of Chemistry and Biotechnology
- Swedish University of Agricultural Sciences
- 750 07 Uppsala, Sweden
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Selig B, Luengo Hendriks CL, Bardage S, Daniel G, Borgefors G. Automatic measurement of compression wood cell attributes in fluorescence microscopy images. J Microsc 2012; 246:298-308. [PMID: 22582799 DOI: 10.1111/j.1365-2818.2012.03621.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This paper presents a new automated method for analyzing compression wood fibers in fluorescence microscopy. Abnormal wood known as compression wood is present in almost every softwood tree harvested. Compression wood fibers show a different cell wall morphology and chemistry compared to normal wood fibers, and their mechanical and physical characteristics are considered detrimental for both construction wood and pulp and paper purposes. Currently there is the need for improved methodologies for characterization of lignin distribution in wood cell walls, such as from compression wood fibers, that will allow for a better understanding of fiber mechanical properties. Traditionally, analysis of fluorescence microscopy images of fiber cross-sections has been done manually, which is time consuming and subjective. Here, we present an automatic method, using digital image analysis, that detects and delineates softwood fibers in fluorescence microscopy images, dividing them into cell lumen, normal and highly lignified areas. It also quantifies the different areas, as well as measures cell wall thickness. The method is evaluated by comparing the automatic with a manual delineation. While the boundaries between the various fiber wall regions are detected using the automatic method with precision similar to inter and intra expert variability, the position of the boundary between lumen and the cell wall has a systematic shift that can be corrected. Our method allows for transverse structural characterization of compression wood fibers, which may allow for improved understanding of the micro-mechanical modeling of wood and pulp fibers.
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Affiliation(s)
- B Selig
- Centre for Image Analysis, Swedish University of Agricultural Sciences, Uppsala, Sweden.
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Khan MG, Daniel G, Konjit M, Thomas A, Eyasu S, Awoke G. Impact of Textile Waste Water on Seed Germination and Some Physiological Parameters in Pea (Pisum sativum L.), Lentil (Lens esculentum L.) and Gram (Cicer arietinum L.). ACTA ACUST UNITED AC 2011. [DOI: 10.3923/ajps.2011.269.273] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Daniel G, Prono E, Renard F, Thouvenot F, Hainzl S, Marsan D, Helmstetter A, Traversa P, Got JL, Jenatton L, Guiguet R. Changes in effective stress during the 2003–2004 Ubaye seismic swarm, France. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010jb007551] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ligibel JA, O'Malley A, Fisher M, Daniel G, Winer EP, Keating NL. Abstract S2-6: Aromatase Inhibitors and Risk of Myocardial Infarction, Stroke and Fracture. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-s2-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Randomized trials have demonstrated that aromatase inhibitors (AI's) are more effective than tamoxifen in preventing breast cancer recurrence. Since many women with early stage disease have a modest risk of recurrence, it is important to consider carefully the potential side effects of treatments in this setting. Trials have suggested increased risk of fracture is the only serious side effect of AI's, but study participants are often healthier than the general population, and little is known about toxicities of AI's in nontrial populations. We sought to evaluate the association between use of AI's and the incidence of myocardial infarction (MI), stroke, and fracture in community-based populations.
Methods: Using encounter and pharmacy data from WellPoint plans in the HealthCore Integrated Research Database, 44,463 women aged ≥50 years with at least 2 diagnosis codes for breast cancer between 2001 and 2007 were identified and followed through the end of 2008. We used propensity score methods to identify matched controls from a cohort of 88,101 women aged ≥50 years enrolled in WellPoint plans who had no diagnosis codes for breast cancer. We identified receipt of aromatase inhibitors and tamoxifen and used Cox proportional hazards models with time-varying treatment variables to assess whether treatment with aromatase inhibitors or tamoxifen was associated with MI, stroke, and fracture among women with breast cancer and to assess the association of breast cancer with the outcomes of interest.
Results: Among 44,049 breast cancer patients and 44,049 matched controls, the average age was 67 and 87% of cases and controls had no baseline comorbidities. After a median follow-up of 899 days for cases and 1004 for controls, 1.3% of women had an MI, 2.9% an ischemic stroke, 1.5% a hip fracture and 9.5% any fracture. Breast cancer patients treated with AI's had a significantly lower adjusted hazard of ischemic stroke and a significantly higher adjusted hazard of fracture compared with breast cancer patients not receiving an AI or tamoxifen.
Table. Adjusted hazard ratio (95% CI) associated with breast cancer and hormonal therapy
Treatment with AI or tamoxifen was not associated with MI or any fracture. Patients treated with tamoxifen had a significantly lower adjusted hazard of stroke and hip fracture compared with breast cancer patients not receiving hormonal therapy.
Conclusion: The side effect profile of AI's in this community-based population was similar to that seen in clinical trials and suggests that these drugs are associated with few serious side effects.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr S2-6.
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Affiliation(s)
- JA Ligibel
- Dana-Farber Cancer Institute; Harvard Medical School; HealthCore, Inc
| | - A O'Malley
- Dana-Farber Cancer Institute; Harvard Medical School; HealthCore, Inc
| | - M Fisher
- Dana-Farber Cancer Institute; Harvard Medical School; HealthCore, Inc
| | - G Daniel
- Dana-Farber Cancer Institute; Harvard Medical School; HealthCore, Inc
| | - EP Winer
- Dana-Farber Cancer Institute; Harvard Medical School; HealthCore, Inc
| | - NL. Keating
- Dana-Farber Cancer Institute; Harvard Medical School; HealthCore, Inc
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Daniel G, Volc J, Kubatova E. Pyranose Oxidase, a Major Source of H(2)O(2) during Wood Degradation by Phanerochaete chrysosporium, Trametes versicolor, and Oudemansiella mucida. Appl Environ Microbiol 2010; 60:2524-32. [PMID: 16349330 PMCID: PMC201679 DOI: 10.1128/aem.60.7.2524-2532.1994] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The production of the H(2)O(2)-generating enzyme pyranose oxidase (POD) (EC 1.1.3.10) (synonym, glucose 2-oxidase), two ligninolytic peroxidases, and laccase in wood decayed by three white rot fungi was investigated by correlated biochemical, immunological, and transmission electron microscopic techniques. Enzyme activities were assayed in extracts from decayed birch wood blocks obtained by a novel extraction procedure. With the coupled peroxidase-chromogen (3-dimethylaminobenzoic acid plus 3-methyl-2-benzothiazolinone hydrazone hydrochloride) spectrophotometric assay, the highest POD activities were detected in wood blocks degraded for 4 months and were for Phanerochaete chrysosporium (149 mU g [dry weight] of decayed wood), Trametes versicolor (45 mU g), and Oudemansiella mucida (1.2 mU g), corresponding to wood dry weight losses of 74, 58, and 13%, respectively. Mn-dependent peroxidase activities in the same extracts were comparable to those of POD, while lignin peroxidase activity was below the detection limit for all fungi with the veratryl alcohol assay. Laccase activity was high with T. versicolor (422 mU g after 4 months), in trace levels with O. mucida, and undetectable in P. chrysosporium extracts. Evidence for C-2 specificity of POD was shown by thin-layer chromatography detection of 2-keto-d-glucose as the reaction product. By transmission electron microscopy-immunocytochemistry, POD was found to be preferentially localized in the hyphal periplasmic space of P. chrysosporium and O. mucida and associated with membranous materials in hyphae growing within the cell lumina or cell walls of partially and highly degraded birch fibers. An extracellular distribution of POD associated with slime coating wood cell walls was also noted. The periplasmic distribution in hyphae and extracellular location of POD are consistent with the reported ultrastructural distribution of H(2)O(2)-dependent Mn-dependent peroxidases. This fact and the dominant presence of POD and Mn-dependent peroxidase in extracts from degraded wood suggest a cooperative role of the two enzymes during white rot decay by the test fungi.
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Affiliation(s)
- G Daniel
- Department of Forest Products, Swedish University of Agricultural Sciences, Box 7008, S-750-07 Uppsala, Sweden
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Karlsson H, Sundberg S, Levels J, Turkina M, Daniel G, Chroni A, Kuivenhoven J, Hovingh G, Holleboom A, Lindahl M. P243 MUTANT apo A-I (L178P) IDENTIFIED IN HDL FROM HETEROZYGOTES OF A FAMILY WITH ENDOTHELIAL DYSFUNCTION AND INCREASED ARTERIAL WALL THICKNESS. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70310-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: 10/19/2022]
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26
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Daniel G, Kumar T, Glaser DA. The matching of vertical lines in the presence of stereoscopic interpolation. J Vis 2010. [DOI: 10.1167/3.12.73] [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: 11/24/2022] Open
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Nassar A, Miyashiro S, Daniel G, Souza S, Peraçoli F. IDENTIFICAÇÃO DA TOXINA BOTULÍNICA TIPO C E D EM BOVINO – RELATO DE CASO. Arq Inst Biol 2009. [DOI: 10.1590/1808-1657v76p4492009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
RESUMO O presente trabalho descreve um quadro de botulismo em bovino fêmea proveniente do Município de São José dos Campos, SP, que apresentou no pós-parto um quadro de paralisia flácida de membros posteriores seguida de óbito, em propriedade de criação extensiva de corte. Foi possível detectar a toxina botulínica tipos C e D a partir dos conteúdos ruminal e intestinal pela técnica de soroneutralização em camundongo. Surtos de botulismo em bovinos são frequentes no Brasil, geralmente devido ao hábito de osteofagia, que leva à ingestão de toxina produzida pelo bacilo anaeróbio Clostridium botulinum. A falta de suplementação mineral pode ser um fator desencadeador do quadro de botulismo, aliado a ausência de um manejo adequado.
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Tan H, Tomic K, Daniel G, Hurley D, Barron R. Evaluating risk of hospitalization with G-CSF use in real-world oncology practice. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.6626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
6626 Background: Limited published data exist on how granulocyte colony-stimulating factor (G-CSF) treatment patterns affect risk of neutropenia-related hospitalizations. This study examines prophylactic vs. delayed use of G-CSF and compares the effectiveness of prophylaxis with filgrastim (FIL) vs. pegfilgrastim (PEG). Methods: A retrospective analysis of administrative claims from U.S. commercial health plans identified adult patients with non-Hodgkin's lymphoma, breast, or lung cancer, treated with chemotherapy between July 2004 and January 2008. For these patients, the first course of chemotherapy and each unique cycle with use of G-CSF (FIL or PEG) was identified and designated ‘prophylaxis’ if used within the first 5 days of each cycle, or ‘delayed', if after day 5. The risk of neutropenia-related hospitalization was then evaluated on a cycle basis. A generalized estimating equation (GEE) was used to adjust for baseline demographics and clinical characteristics. Results: Among 5,571 patient-cycles identified: 87.4% were prophylactic and 12.6% were delayed G-CSF. PEG use was primarily prophylactic (93.6%) in contrast to use of FIL which was delayed in 62.5% of patient-cycles. The rate of neutropenic hospitalization was 1.2% for prophylaxis (n=59) and 3.7% for delayed G-CSF (n=26) (P < 0.001). Among prophylactic patient-cycles, the neutropenic hospitalization rate was lower with PEG than FIL (1.1% (n=51) vs. 3.5% (n=8), p = 0.001). Multivariate analyses using GEE model showed consistent trends (Table). Conclusions: Prophylactic G-CSF use was associated with lower neutropenic hospitalization risk than delayed use. Among prophylactic use in real-world oncology practice, PEG was associated with about a two-thirds lower risk of neutropenic hospitalization compared with FIL. [Table: see text] [Table: see text]
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Affiliation(s)
- H. Tan
- HealthCore, Wilmington, DE; Amgen, Inc., Thousand Oaks, CA
| | - K. Tomic
- HealthCore, Wilmington, DE; Amgen, Inc., Thousand Oaks, CA
| | - G. Daniel
- HealthCore, Wilmington, DE; Amgen, Inc., Thousand Oaks, CA
| | - D. Hurley
- HealthCore, Wilmington, DE; Amgen, Inc., Thousand Oaks, CA
| | - R. Barron
- HealthCore, Wilmington, DE; Amgen, Inc., Thousand Oaks, CA
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Dragnea D, Daniel G. Blocked scavenging causing increased Fico 2. Anaesthesia 2009; 64:336. [DOI: 10.1111/j.1365-2044.2009.05881.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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Daniel G. Konzeptionelles Design von Reaktivdestillationsprozessen. CHEM-ING-TECH 2007. [DOI: 10.1002/cite.200750059] [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: 11/05/2022]
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Marsan D, Daniel G. Measuring the heterogeneity of the coseismic stress change following the 1999Mw7.6 Chi-Chi earthquake. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jb004651] [Citation(s) in RCA: 5] [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: 11/09/2022]
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Brown CJ, Eaton RA, Cragg SM, Goulletquer P, Nicolaidou A, Bebianno MJ, Icely J, Daniel G, Nilsson T, Pitman AJ, Sawyer GS. Assessment of effects of chromated copper arsenate (CCA)-treated timber on nontarget epibiota by investigation of fouling community development at seven European sites. Arch Environ Contam Toxicol 2003; 45:37-47. [PMID: 12948171 DOI: 10.1007/s00244-002-0178-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
To assess the effect of the anti-marine-borer timber preservative CCA (a pressure-impregnated solution of copper, chromium, and arsenic compounds) on nontarget epibiota, fouling community development was investigated. Panels of Scots pine treated to target retentions of 12, 24, and 48 kg CCA per m3 of wood (covering the range of retentions recommended for marine use) plus untreated controls were submerged at seven coastal sites (Portsmouth, UK; La Tremblade [two sites], France; Ria Formosa, Portugal; Sagres, Portugal; Kristineberg, Sweden; Athens, Greece). The fouling community on the surfaces of the panels was assessed both qualitatively and quantitatively after 6, 12, and 18 months of exposure. Multivariate statistical methods were used to compare community structure between panel treatments. Panels treated to the three CCA loadings supported very similar fouling assemblages, which in most cases had higher numbers of taxa and individuals than assemblages on untreated panels. No detrimental effects on epibiota due to CCA preservatives were detected at any of the treatment levels at all seven exposure sites, suggesting that the range of environmental conditions at the sites had no bearing on preservative impact on fouling biota. Differences in community structure between CCA-treated and untreated panels may be due to enhanced larval settlement on CCA-treated timber by some species as a result of modifications to the surface properties of the timber by the preservative. Possible reasons for the higher numbers of certain species on the surface of CCA-treated panels are discussed.
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Affiliation(s)
- C J Brown
- University of Portsmouth, School of Biological Sciences, King Henry Building, King Henry I St., Portsmouth, PO1 2DY, United Kingdom.
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Filonova LH, von Arnold S, Daniel G, Bozhkov PV. Programmed cell death eliminates all but one embryo in a polyembryonic plant seed. Cell Death Differ 2002; 9:1057-62. [PMID: 12232793 DOI: 10.1038/sj.cdd.4401068] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2002] [Revised: 03/15/2002] [Accepted: 04/08/2002] [Indexed: 11/08/2022] Open
Abstract
Development of multiple embryos from a single zygote, the phenomenon called monozygotic polyembryony, is a widespread reproductive strategy found in higher plants and especially in gymnosperms. The enigma of plant monozygotic polyembryony is that only one embryo in a polyembryonic seed usually survives while the others are eliminated at an early stage. Here we report that programmed cell death (PCD) is the major mechanism responsible for elimination of subordinate embryos in a polyembryonic seed. Using post-fertilized pine (Pinus sylvestris) ovules, we show that once the dominant embryo is selected and, subsequently, the entire female gametophyte is affected by PCD, the cells of subordinate embryos initiate an autolytic self-destruction program. The progression of embryonic PCD follows a rigid basal-apical pattern, first killing the most basally situated cells, adjacent to the suspensor, and then proceeding towards the apical region until all cells in the embryonal mass are doomed. Our data demonstrate that during polyembryony, PCD serves to halt competition among monozygotic embryos in order to ensure survival of one embryo.
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Affiliation(s)
- L H Filonova
- Department of Forest Genetics, Swedish University of Agricultural Sciences, Box 7027, S-75007 Uppsala, Sweden
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Volc J, Kubátová E, Daniel G, Sedmera P, Haltrich D. Screening of basidiomycete fungi for the quinone-dependent sugar C-2/C-3 oxidoreductase, pyranose dehydrogenase, and properties of the enzyme from Macrolepiota rhacodes. Arch Microbiol 2001; 176:178-86. [PMID: 11511865 DOI: 10.1007/s002030100308] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2001] [Accepted: 05/11/2001] [Indexed: 10/27/2022]
Abstract
Mycelial cultures of 76 strains of lignocellulose-degrading basidiomycete fungi were screened for the activity of pyranose dehydrogenase, a novel sugar oxidoreductase recently detected in Agaricus bisporus. Of these fungi, 37 strains belonging to seven phylogenetically related genera of mostly litter-decomposing Agaricales were positive for the dehydrogenase, based on activity assays towards D-glucose with 1,4-benzoquinone or ferricenium ion as electron acceptors, and on TLC/HPLC analyses of the reaction products. Lack of activity with O(2) as the oxidant, specificity for C-3 of D-glucose, and active extracellular secretion of the enzyme were used as criteria to differentiate pyranose dehydrogenase from pyranose 2-oxidase (EC 1.1.3.10), known to be produced by numerous wood-rotting fungi. Extracellular pyranose dehydrogenase from Macrolepiota rhacodes was heavily glycosylated. The enzyme was characterized as a 78-kDa flavoprotein under denaturing conditions and a 76-kDa native protein using gel filtration. This enzyme had a maximum extracellular activity of 4.1 U ml(-1) in 39-day liquid cultures. It exhibited broad selectivity for sugar substrates and oxidized D-glucose (K(m)=1.82) exclusively at C-3 to 3-dehydro-D-glucose (D-ribo-hexos-3-ulose), in contrast to pyranose dehydrogenases from Agaricus species, which acted at both C-3 and C-2 of D-glucose. The N-terminal sequence, AVVYRHPDEL, showed significant similarity with that reported for A. bisporus.
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Affiliation(s)
- J Volc
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídenská 1083, 142 20 Prague 4, Czech Republic.
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Filonova LH, Bozhkov PV, Brukhin VB, Daniel G, Zhivotovsky B, von Arnold S. Two waves of programmed cell death occur during formation and development of somatic embryos in the gymnosperm, Norway spruce. J Cell Sci 2000; 113 Pt 24:4399-411. [PMID: 11082033 DOI: 10.1242/jcs.113.24.4399] [Citation(s) in RCA: 160] [Impact Index Per Article: 6.7] [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: 01/26/2023] Open
Abstract
In the animal life cycle, the earliest manifestations of programmed cell death (PCD) can already be seen during embryogenesis. The aim of this work was to determine if PCD is also involved in the elimination of certain cells during plant embryogenesis. We used a model system of Norway spruce somatic embryogenesis, which represents a multistep developmental pathway with two broad phases. The first phase is represented by proliferating proembryogenic masses (PEMs). The second phase encompasses development of somatic embryos, which arise from PEMs and proceed through the same sequence of stages as described for their zygotic counterparts. Here we demonstrate two successive waves of PCD, which are implicated in the transition from PEMs to somatic embryos and in correct embryonic pattern formation, respectively. The first wave of PCD is responsible for the degradation of PEMs when they give rise to somatic embryos. We show that PCD in PEM cells and embryo formation are closely interlinked processes, both stimulated upon withdrawal or partial depletion of auxins and cytokinins. The second wave of PCD eliminates terminally differentiated embryo-suspensor cells during early embryogeny. During the dismantling phase of PCD, PEM and embryo-suspensor cells exhibit progressive autolysis, resulting in the formation of a large central vacuole. Autolytic degradation of the cytoplasm is accompanied by lobing and budding-like segmentation of the nucleus. Nuclear DNA undergoes fragmentation into both large fragments of about 50 kb and multiples of approximately 180 bp. The tonoplast rupture is delayed until lysis of the cytoplasm and organelles, including the nucleus, is almost complete. The protoplasm then disappears, leaving a cellular corpse represented by only the cell wall. This pathway of cell dismantling suggests overlapping of apoptotic and autophagic types of PCD during somatic embryogenesis in Norway spruce.
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Affiliation(s)
- L H Filonova
- Department of Forest Genetics, Uppsala Genetic Centre, Swedish University of Agricultural Sciences, Box 7027, S-75007 Uppsala, Sweden
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Asiegbu FO, Kacprzak M, Daniel G, Johansson M, Stenlid J, Mañka M. Biochemical interactions of conifer seedling roots with Fusarium spp. Can J Microbiol 1999. [DOI: 10.1139/w99-099] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The importance of root and spore surface molecules in the interactions of Fusarium spp. with conifer roots, and cellular localization of proteins presumed to be involved in host defence, were investigated. For adhesion studies, using a combination of fluorescein isothiocyanate (FITC) labelled lectins and high perfomance liquid chromatography (HPLC), several sugars (pinitol, xylitol, galactose, mannose, and glucose) were detected in root surface mucilage. Both artificial substrata and detached living roots were used to evaluate the significance of selective removal of root or spore surface components on the adhesion process. The spores or roots were pretreated with either periodic acid, pronase E, potassium hydroxide or diethyl ether. Pretreatment of the spores with diethyl ether reduced significantly the level of spore adhesion, which suggests that the adhesive component is either a lipid, or is bound to lipid. Since oxidation of carbohydrate reactive sites with periodic acid on the root surface almost completely abolished the development of germ tubes by adherent spores, it was presumed that some of these periodate-sensitive substances serve as a nutrient source for the fungus. On inoculated roots, F. avenaceum and F. culmorum were significantly pathogenic to both Norway spruce and Scots pine seedlings. Cytochemical labelling of sites of accumulation of host defence molecules within infected root tissues using anti-peroxidase demonstrated increased peroxidase activity in host cell walls. With anti-chitinase and anti-glucanase, gold labelling was found mainly on pathogen hyphal walls.Key words: conifer seedlings, adhesion, Fusarium spp., PR proteins, immunolocalization, lectins.
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Oladipo A, Daniel G, Jones A. Hirschsprung's disease: an unusual presentation in pregnancy. J OBSTET GYNAECOL 1999; 19:206-7. [PMID: 15512276 DOI: 10.1080/01443619965660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Asiegbu F, Kacprzak M, Daniel G, Johansson M, Stenlid J, Mañka M. Biochemical interactions of conifer seedling roots with Fusarium spp. Can J Microbiol 1999. [DOI: 10.1139/cjm-45-11-923] [Citation(s) in RCA: 7] [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: 11/22/2022]
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Goodell B, Jellison J, Liu J, Daniel G, Paszczynski A, Fekete F, Krishnamurthy S, Jun L, Xu G. Low molecular weight chelators and phenolic compounds isolated from wood decay fungi and their role in the fungal biodegradation of wood1This is paper 2084 of the Maine Agricultural and Forest Experiment Station.1. J Biotechnol 1997. [DOI: 10.1016/s0168-1656(97)01681-7] [Citation(s) in RCA: 294] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Volc J, Kubátová E, Wood DA, Daniel G. Pyranose 2-dehydrogenase, a novel sugar oxidoreductase from the basidiomycete fungus Agaricus bisporus. Arch Microbiol 1997; 167:119-25. [PMID: 9133318] [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: 02/04/2023]
Abstract
A novel C-2-specific sugar oxidoreductase, tentatively designated as pyranose 2-dehydrogenase, was purified 68-fold to apparent homogeneity (16.4 U/mg protein) from the mycelia of Agaricus bisporus, which expressed maximum activity of the enzyme during idiophasic growth in liquid media. Using 1,4-benzoquinone as an electron acceptor, pyranose 2-dehydrogenase oxidized d-glucose to d-arabino-2-hexosulose (2-dehydroglucose, 2-ketoglucose), which was identified spectroscopically through its N,N-diphenylhydrazone. The enzyme is highly nonspecific. d-,l-Arabinose, d-ribose, d-xylose, d-galactose, and several oligosaccharides and glycopyranosides were all converted to the corresponding 2-aldoketoses (aldosuloses) as indicated by TLC. d-Glucono-1,5-lactone, d-arabino-2-hexosulose, and l-sorbose were also oxidized at significant rates. UV/VIS spectrum of the native enzyme (lambdamax 274, 362, and 465 nm) was consistent with a flavin prosthetic group. In contrast to oligomeric intracellular pyranose 2-oxidase (EC 1.1.3.10), pyranose 2-dehydrogenase is a monomeric glycoprotein (pI 4.2) incapable of reducing O2 to H2O2 (> 5 x 10(4)-fold lower rate using a standard pyranose oxidase assay); pyranose 2-dehydrogenase is actively secreted into the extracellular fluid (up to 0.5 U/ml culture filtrate). The dehydrogenase has a native molecular mass of approximately 79 kDa as determined by gel filtration; its subunit molecular mass is approximately 75 kDa as estimated by SDS-PAGE. Two pH optima of the enzyme were found, one alkaline at pH 9 (phosphate buffer) and the other acidic at pH 4 (acetate buffer). Ag+, Hg2+, Cu2+, and CN- (10 mM) were inhibitory, while 50 mM acetate had an activating effect.
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Affiliation(s)
- J Volc
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeònská 1083, 14220 Prague 4, Czech Republic
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Daniel G, Hahn K, Bravo L, Legendre A. The effect of a single therapeutic dose of cisplatin on GFR in dogs. Oncol Rep 1997; 4:153-156. [PMID: 21590032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
This study prospectively describes the late effect of a single dose of cisplatin on GFR in tumor-bearing dogs. GFR (measured by quantitative renal scintigraphy), BUN, creatinine, and urine specific gravity values were obtained in 19 tumor-bearing dogs prior to and four weeks after a single dose of cisplatin. Eleven tumor-bearing dogs were given a known non-nephrotoxic anticancer drug, dexniguldipine, as control. No significant differences in pretreatment GFR, serum chemistry, or urinalysis values were observed between cisplatin-treated and control dogs. GFR was significantly decreased four weeks following cisplatin administration. The average percent change in GFR was -13.49% for all cisplatin treated dogs. No significant alterations of BUN, serum creatinine, or urine specific gravity were observed following treatment. In the control group, the average percent change in GFR was +3.98% which was not significantly different from pretreatment values.
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Affiliation(s)
- G Daniel
- UNIV TENNESSEE,COLL VET MED,DEPT COMPARAT MED,KNOXVILLE,TN 37901
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Volc J, Kubátová E, Daniel G, Prikrylová V. Only C-2 specific glucose oxidase activity is expressed in ligninolytic cultures of the white rot fungus Phanerochaete chrysosporium. Arch Microbiol 1996; 165:421-4. [PMID: 8661938 DOI: 10.1007/s002030050348] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Two d-glucose-oxidizing enzymes, glucose 1-oxidase (G1O) and pyranose 2-oxidase (P2O, glucose 2-oxidase), have been proposed to play an important role in the ligninolytic system of the white rot fungus Phanerochaete chrysosporium by producing hydrogen peroxide. The possible simultaneous expression and metabolic cooperation of the two oxidases was studied in strains ME-446 (reported as G1O positive) and K-3 (P2O positive) grown in liquid media and under near natural conditions on birch wood blocks. The presence of G1O and P2O in extracts from mycelia and decayed wood was determined by chromatographic, electrophoretic, and immunological methods. Attempts to separate these enzymes and to detect G1O and its reaction product, d-glucono-1,5-lactone, failed. Evidence was obtained only for P2O expression in both strains. Accordingly, P2O, rather than G1O, represents a major source of sugar-derived H2O2 under the culture conditions used.
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Affiliation(s)
- J Volc
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídenská 1083, 14220 Prague 4, Czech Republic
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Asiegbu F, Daniel G, Johansson M. Cellular interaction between the saprotroph Phlebiopsis gigantea and non-suberized roots of Picea abies. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s0953-7562(96)80136-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Schweizer GF, Baumer M, Daniel G, Rugel H, Röder MS. RFLP markers linked to scald (Rhynchosporium secalis) resistance gene Rh2 in barley. Theor Appl Genet 1995; 90:920-924. [PMID: 24173045 DOI: 10.1007/bf00222904] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/1994] [Accepted: 12/08/1994] [Indexed: 06/02/2023]
Abstract
Rhynchosporium secalis is the causal organism of barley scald disease. A number of resistance genes against the fungus are well known; one of them, the single dominant Rh2 resistance gene, has been mapped on the linkage map of barley using RFLP (restriction fragment length polymorphism) markers. The Rh2 gene was located on the distal part of chromosome arm 1S co-segregating with the RFLP marker CDO545 in 85 doubled-haploid progeny plants. The spring barley test population used was a cross between the 6-rowed American spring barley cv Atlas, C.I. 4118, carrying the Rh2 resistance gene, and a Bavarian 2-rowed malting barley cv Steffi, susceptible for R. secalis. The assessment of resistance versus susceptibility was based on artificial infections with a one-spore inoculum in greenhouse tests and with pathotype mixtures in field tests. By testing a pathotype mixture of German origin good resistance was found for the Rh2 gene in the field.
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Affiliation(s)
- G F Schweizer
- Bayerische Landesanstalt für Bodenkultur und Pflanzenbau (LBP), Biotechnologie, Vöttingerstraße 38, 85354, Freising, Germany
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Harnsberger JR, Charvat P, Longo WE, Vernava AM, Salimi Z, Arends T, Daniel G. The role of intrarectal ultrasound (IRUS) in staging of rectal cancer and detection of extrarectal pathology. Am Surg 1994; 60:571-6; discussion 576-7. [PMID: 8030810] [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: 01/28/2023]
Abstract
Intrarectal Ultrasound (IRUS) is rapidly becoming an effective tool in the staging of rectal cancer. Twenty-nine consecutive patients with adenocarcinoma of the rectum underwent both CT scanning and IRUS in the preoperative assessment of rectal cancer in an effort to correlate IRUS staging with surgical pathology, correlate tumor staging comparing IRUS with CT scan, and determine incidence of extrarectal pathology by IRUS. Patients were reviewed as to IRUS stage, results of CT scan, TNM stage of extirpated tumor, incidence of genitourinary pathology, and sonographic result of preoperative radiotherapy (RT). The mean age of all patients was 69 years; there were 25 males and four females. Twenty-four patients underwent proctectomy with either low pelvic anastomosis or end stoma; five underwent local surgical therapy. Thirteen patients received preoperative RT. CT scan correlated poorly with IRUS staging of tumors penetrating the muscularis propria. IRUS overstaged 40 per cent, understaged 5 per cent, and correctly staged 55 per cent of patients when compared with pathological specimens. Eleven of the 25 males (44 per cent) had abnormal prostates by IRUS. Five (20%) had further urologic intervention, resulting in two prostatic cancers found. Our data suggests that CT scan staging correlated poorly with IRUS staging. CT poorly determines depth of rectal tumor wall invasion. IRUS correlated well with pathology and understaged 5 per cent of patients before surgery. Genitourinary abnormalities were detected in a significant number of patients. IRUS is an effective modality for preoperative staging of rectal cancer.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J R Harnsberger
- Department of Surgery, St. Louis University School of Medicine, Missouri
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Peltier P, Curtet C, Chatal JF, Le Doussal JM, Daniel G, Aillet G, Gruaz-Guyon A, Barbet J, Delaage M. Radioimmunodetection of medullary thyroid cancer using a bispecific anti-CEA/anti-indium-DTPA antibody and an indium-111-labeled DTPA dimer. J Nucl Med 1993; 34:1267-73. [PMID: 8326383] [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: 01/29/2023] Open
Abstract
Two-step radioimmunotargeting using a bispecific anti-CEA/anti-in-DTPA monoclonal antibody and an 111In-labeled DTPA dimer (diDTPA-TL) was evaluated nine times in eight patients with medullary thyroid cancer (MTC). Immunoscintigraphy was performed 5 and 24 hr after injection of 111In-diDTPA-TL. For five patients, radioimmunoguided surgery (RIGS) was performed using a hand-held gamma probe (sodium iodine), and a biodistribution study was performed 48 hr (four times) and 24 hr (one time) after injection of 111In-diDTPA-TL. Mean tumor uptake (%ID/kg in tumor) was 39 (range 2.75-139). In these five patients, immunoscintigraphy visualized all known tumors and detected unknown foci (US and CT were negative) in the neck (once) and neck and liver (once). Immunoscintigraphy, performed four times in search of a recurrence, detected unknown localizations in the mediastinum and neck (twice) and was negative twice. There were no false-positives. In three of five patients who had surgery, RIGS localized tumor foci not detected by the surgeon. RIGS failed to detect two small lesions (10 x 10 mm) corresponding to sites of fibrosis and microscopic cancer infiltration. Bispecific anti-CEA/anti-In-DTPA mediated targeting of 111In-diDTPA-TL provided elevated tumor uptake and tumor-to-normal tissue ratios. Radioimmunodetection of small MTC lesions is thus possible even when morphological imaging techniques prove negative.
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Affiliation(s)
- P Peltier
- Nuclear Medicine Department, Centre Rene Gauducheau, Nantes, France
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Gabriel J, Volc J, Sedmera P, Daniel G, Kubátová E. Pyranosone dehydratase from the basidiomycete Phanerochaete chrysosporium: improved purification, and identification of 6-deoxy-D-glucosone and D-xylosone reaction products. Arch Microbiol 1993; 160:27-34. [PMID: 8352649 DOI: 10.1007/bf00258142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 01/30/2023]
Abstract
Pyranose oxidase and pyranosone dehydratase (aldos-2-ulose dehydratase), enzymes which convert in coupled reactions D-glucose to beta-pyrone cortalcerone, peaked coincidently during idiophasic growth of Phanerochaete chrysosporium under agitated conditions. The enzymes were purified from mycelial extracts of the fungus and separated from each other by hydrophobic interaction chromatography on Phenyl-Sepharose and Phenyl-Superose. Two pyranosone dehydratase activity peaks, PD I and PD II, were resolved. The major PD I fraction, consisting about 74% of the total dehydratase activity, was further purified by anion exchange chromatography on Mono Q to yield apparently pure enzyme as judged by SDS-PAGE and gel filtration on Superose 12. Isoelectric focusing indicated microheterogeneity of the protein by the presence of at least five protein bands with pI 5.1-5.3. PD II had a pI of 5.75. Overall PD I purification was 60.7-fold with 50% yield. The enzyme acted on several osones (glycosuloses), with the preferred substrate being D-glucosone. D-Xylosone and 6-deoxy-D-glucosone were dehydrated at C-3-C-4 to give the corresponding 5-hydroxy-2,3-dioxoalcanals (4-deoxy-2,3-glycosdiuloses), new enzymatically produced sugar derivatives. The latter labile compounds were trapped as diphenylhydrazine or o-phenylenediamine derivatives and spectroscopically identified. The analogous D-glucosone dehydration product did not accumulate due to its further transformation. pH optimum of PD I activity was 6.0 and its pH stability was optimal at pH 7-11. The enzyme was sensitive to Me2+ chelating agents and some heavy metal ions (Hg2+, Cu2+).
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Affiliation(s)
- J Gabriel
- Institute of Microbiology, Academy of Sciences of Czech Republic, Prague
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