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He M, Wong A, Sutton K, Gondim MJB, Samson C. Very-Early Onset Chronic Active Colitis with Heterozygous Variants in LRBA1 and CARD11, a Case of "Immune TOR-Opathies". Fetal Pediatr Pathol 2023; 42:297-306. [PMID: 35748740 DOI: 10.1080/15513815.2022.2088912] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND A small subset of cases of inflammatory bowel disease (IBD) occurs as a result of single gene defects, and typically occurs in young or very young pediatric patients, referred to as "monogenic very-early onset IBD (VEO-IBD)". The gene variants leading to monogenic VEO-IBD are often associated with primary immunodeficiency syndromes. CASE REPORT A six year-old girl presented to our gastroenterology clinic with LRBA deficiency with a heterozygous mutation at c.1399 A > G, p Met467Val, histopathologic chronic active colitis without granulomas and clinical chronic colitis. Her gastrointestinal symptoms began at age 5 with bloody diarrhea, abdominal pain and weight loss. Whole exome sequencing revealed a CARD11 heterozygous de novo mutation (c.220 + 1G > A). She was in clinical remission on only abatacept. DISCUSSION We present a case of monogenic VEO-IBD associated with two heterozygous variants in LRBA1 and CARD11, both considered as key players in the newly proposed "immune TOR-opathies".
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Affiliation(s)
- Mai He
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Amanda Wong
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Kimberly Sutton
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
| | - Mercia Jeanne Bezerra Gondim
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
- Department of Pathology & Laboratory Medicine, University of Louisville School of Medicine, Louisville, KY, USA
| | - Charles Samson
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
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Khawja S, Ernst RE, Samson C, Byrne PK, Ghail RC, MacLellan LM. Tesserae on Venus may preserve evidence of fluvial erosion. Nat Commun 2020; 11:5789. [PMID: 33188168 PMCID: PMC7666114 DOI: 10.1038/s41467-020-19336-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 10/06/2020] [Indexed: 11/30/2022] Open
Abstract
Fluvial erosion is usually assumed to be absent on Venus, precluded by a high surface temperature of ~450 °C and supported by extensive uneroded volcanic flows. However, recent global circulation models suggest the possibility of Earth-like climatic conditions on Venus for much of its earlier history, prior to catastrophic runaway greenhouse warming. We observe that the stratigraphically oldest, geologically most complex units, tesserae, exhibit valley patterns morphologically similar to the patterns resulting from fluvial erosion on Earth. Given poor topographic resolution, we use an indirect technique to recognize valleys, based on the pattern of lava flooding of tesserae margins by adjacent plains volcanism. These observed valley patterns are attributed to primary geology, tectonic deformation, followed by fluvial erosion (and lesser wind erosion). This proposed fluvial erosion in tesserae provides support for climate models for a cool, wet climate on early Venus and could be an attractive research theme for future Venus missions. The authors here use Magellan data to interpret geomorphological features on Venus and present a strong hypothesis for fluvial erosion.
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Affiliation(s)
- S Khawja
- Department of Earth Sciences, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - R E Ernst
- Department of Earth Sciences, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada. .,Faculty of Geology and Geography, Tomsk State University, 36 Lenin Avenue, Tomsk, 634050, Russia.
| | - C Samson
- Department of Earth Sciences, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - P K Byrne
- Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC, 27695, USA
| | - R C Ghail
- Department of Earth Sciences, Royal Holloway, University of London, Egham, TW20 0EX, UK
| | - L M MacLellan
- Department of Earth Sciences, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
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Khare R, Kappelman MD, Samson C, Pyrzanowski J, Darwar RA, Forrest CB, Bailey CC, Margolis P, Dempsey A. Development and evaluation of an EHR-based computable phenotype for identification of pediatric Crohn's disease patients in a National Pediatric Learning Health System. Learn Health Syst 2020; 4:e10243. [PMID: 33083542 PMCID: PMC7556434 DOI: 10.1002/lrh2.10243] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 06/16/2020] [Accepted: 07/23/2020] [Indexed: 01/16/2023] Open
Abstract
Objectives To develop and evaluate the classification accuracy of a computable phenotype for pediatric Crohn's disease using electronic health record data from PEDSnet, a large, multi‐institutional research network and Learning Health System. Study Design Using clinician and informatician input, algorithms were developed using combinations of diagnostic and medication data drawn from the PEDSnet clinical dataset which is comprised of 5.6 million children from eight U.S. academic children's health systems. Six test algorithms (four cases, two non‐cases) that combined use of specific medications for Crohn's disease plus the presence of Crohn's diagnosis were initially tested against the entire PEDSnet dataset. From these, three were selected for performance assessment using manual chart review (primary case algorithm, n = 360, primary non‐case algorithm, n = 360, and alternative case algorithm, n = 80). Non‐cases were patients having gastrointestinal diagnoses other than inflammatory bowel disease. Sensitivity, specificity, and positive predictive value (PPV) were assessed for the primary case and primary non‐case algorithms. Results Of the six algorithms tested, the least restrictive algorithm requiring just ≥1 Crohn's diagnosis code yielded 11 950 cases across PEDSnet (prevalence 21/10 000). The most restrictive algorithm requiring ≥3 Crohn's disease diagnoses plus at least one medication yielded 7868 patients (prevalence 14/10 000). The most restrictive algorithm had the highest PPV (95%) and high sensitivity (91%) and specificity (94%). False positives were due primarily to a diagnosis reversal (from Crohn's disease to ulcerative colitis) or having a diagnosis of “indeterminate colitis.” False negatives were rare. Conclusions Using diagnosis codes and medications available from PEDSnet, we developed a computable phenotype for pediatric Crohn's disease that had high specificity, sensitivity and predictive value. This process will be of use for developing computable phenotypes for other pediatric diseases, to facilitate cohort identification for retrospective and prospective studies, and to optimize clinical care through the PEDSnet Learning Health System.
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Affiliation(s)
| | - Michael D Kappelman
- Division of Pediatric Gastroenterology, Department of Pediatrics University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Charles Samson
- Division of Gastroenterology, Hepatology & Nutrition; Department of Pediatrics Washington University in St Louis School of Medicine St. Louis Missouri USA
| | - Jennifer Pyrzanowski
- Adult and Child Consortium for Outcomes Research and Dissemination Science University of Colorado Denver Aurora Colorado USA
| | - Rahul A Darwar
- Applied Clinical Research Center Children's Hospital of Philadelphia Philadelphia Pennsylvania USA
| | - Christopher B Forrest
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia PA and Department of Pediatrics, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
| | - Charles C Bailey
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia PA and Department of Pediatrics, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
| | - Peter Margolis
- James M. Anderson Center for Health Systems Excellence, Department of Pediatrics Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
| | - Amanda Dempsey
- Department of Pediatrics University of Colorado Denver Aurora Colorado USA
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Walsh KE, Marsolo KA, Davis C, Todd T, Martineau B, Arbaugh C, Verly F, Samson C, Margolis P. Accuracy of the medication list in the electronic health record-implications for care, research, and improvement. J Am Med Inform Assoc 2019; 25:909-912. [PMID: 29771350 DOI: 10.1093/jamia/ocy027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 05/10/2018] [Indexed: 11/14/2022] Open
Abstract
Objective Electronic medication lists may be useful in clinical decision support and research, but their accuracy is not well described. Our aim was to assess the completeness of the medication list compared to the clinical narrative in the electronic health record. Methods We reviewed charts of 30 patients with inflammatory bowel disease (IBD) from each of 6 gastroenterology centers. Centers compared IBD medications from the medication list to the clinical narrative. Results We reviewed 379 IBD medications among 180 patients. There was variation by center, from 90% patients with complete agreement between the medication list and clinical narrative to 50% agreement. Conclusions There was a range in the accuracy of the medication list compared to the clinical narrative. This information may be helpful for sites seeking to improve data quality and those seeking to use medication list data for research or clinical decision support.
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Affiliation(s)
- Kathleen E Walsh
- Department of Pediatrics, James M. Anderson Center for Health Systems Excellence, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Keith A Marsolo
- Department of Biomedical Informatics and Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Cori Davis
- Department of Pediatrics, University of Michigan Health System, Ann Arbor, MI, USA
| | - Theresa Todd
- Department of Pediatrics, Division of Gastroenterology, Nationwide Children's Hospital, Columbus, OH, USA
| | - Bernadette Martineau
- Department of Pediatrics, Children's Specialty Services, Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Carlie Arbaugh
- Department of Pediatrics, Program for Patient Safety and Quality, Boston Children's Hospital, Boston, MA, USA
| | - Frederique Verly
- Department of Pediatrics, Program for Patient Safety and Quality, Boston Children's Hospital, Boston, MA, USA
| | - Charles Samson
- Department of Pediatrics, Division of Pediatric Gastroenterology, Washington University School of Medicine, St. Louis, MO, USA
| | - Peter Margolis
- Department of Pediatrics, James M. Anderson Center for Health Systems Excellence, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
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Puffenbarger MS, Ahmad FA, Argent M, Gu H, Samson C, Quayle KS, Saito JM. Reduction of Computed Tomography Use for Pediatric Closed Head Injury Evaluation at a Nonpediatric Community Emergency Department. Acad Emerg Med 2019; 26:784-795. [PMID: 30428150 DOI: 10.1111/acem.13666] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/13/2018] [Accepted: 11/12/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The purpose of this study was to determine if implementation of a Pediatric Emergency Care Applied Research Network (PECARN)-based Closed Head Injury Assessment Tool could safely decrease computed tomography (CT) use for pediatric head injury evaluation at a nonpediatric community emergency department (ED). METHODS A quality improvement project was initiated at a nonpediatric community ED to implement an institution-specific, PECARN-based Pediatric Closed Head Injury Assessment Tool. Baseline head CT use at the participating ED was determined for children with closed head injury through retrospective chart review from March 2014 through November 2015. Head injury patients were identified using International Classification of Disease (ICD)-9 codes for head injury, unspecified (959.01) and concussion with and without loss of consciousness (850-850.9) until October 2015, after which ICD-9 was no longer used. To identify eligible patients after October 2015, lists of all pediatric patients evaluated at the participating ED were reviewed, and patients were included in the analysis if they had a physician-assigned discharge diagnosis of head injury or concussion. Exclusion criteria were age ≥ 18 years, penetrating head trauma, history of brain tumor, ventriculoperitoneal shunt, bleeding disorder, or presentation > 24 hours postinjury. Medical history, injury mechanism, symptoms, head CT use, and disposition were recorded. Implementation of the Pediatric Closed Head Injury Assessment Tool was achieved through provider education sessions beginning in December 2015 and ending in August 2016. Head CT use was monitored for 12 months postimplementation, from September 2016 through August 2017. Patients were classified into low, intermediate, or high risk for clinically important traumatic brain injury (ciTBI) by chart review. ED length of stay (LOS), disposition, and ED returns within 72 hours were recorded. Categorical variables were compared using chi-square test or Fisher's exact test, and continuous variables, using Kruskal-Wallis test. RESULTS A total of 252 children with closed head injury were evaluated preimplementation (March 2014 through November 2015), 132 children were evaluated during implementation (December 2015 through August 2016), and 172 children were evaluated postimplementation (September 2016 through August 2017). Overall CT use decreased from 37.7% (95% confidence interval [CI] = 31.7-43.7) preimplementation to 16.9% (95% CI = 11.3-22.5) postimplementation (p < 0.001). Only 1% (95% CI = 0%-2.9%) of low-risk patients received a head CT postimplementation compared to 22.6% (95% CI = 16.1%-29.1%) preimplementation (p < 0.001). CT use among patients ≥ 24 months decreased from 42.9% (95% CI = 36.5%-49.6%) to 19.6% (95% CI = 13.1%-26.1%; p < 0.001) and remained low and unchanged for patients < 24 months. Transfers to a pediatric trauma center and ED returns within 72 hours were unchanged, while median ED LOS improved from 1.5 to 1.3 hours (p = 0.03). There were no missed ciTBIs after implementation of the guideline. CONCLUSION Implementation of the PECARN-based Pediatric Closed Head Injury Assessment Tool reduced head CT use in a nonpediatric ED. The greatest impact was seen among children aged ≥ 24 months at very low risk for ciTBI.
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Affiliation(s)
| | | | | | - Hongjie Gu
- Department of Biostatistics St. Louis MO
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6
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Boule-Laghzali N, Diodati J, Samson C, Page M. P388Beyond the diagnostic value of CMR in ARVC. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez109.029] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
| | - J Diodati
- Hospital du Sacre-Coeur, Montreal, Canada
| | - C Samson
- Hospital du Sacre-Coeur, Montreal, Canada
| | - M Page
- Hospital du Sacre-Coeur, Montreal, Canada
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Granjon M, Koudzi M, Chirrouze C, Illes H, Samson C, Beaussant-Cohen S. P-524 – Polyarthrite fébrile et thrombopénie révélant un VIH en pédiatrie. Arch Pediatr 2015. [DOI: 10.1016/s0929-693x(15)30699-0] [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: 11/29/2022]
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Bonoldi I, Allen P, Tognin S, Madeira L, Azis M, Samson C, Quinn B, Modinos G, Bossong M, Stone J, Perez J, Howes O, Fusar-Poli P, McGuire P. Gray Matter Reductions in Cortical Midline Structures Related to Basic Self Disturbances in People at “ultra High Risk” for Psychosis. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)30239-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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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9
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McLeod T, Samson C, Labrie M, Shehata K, Mah J, Lai P, Wang L, Elder J. Using Video Acquired from an Unmanned Aerial Vehicle (UAV) to Measure Fracture Orientation in an Open-Pit Mine. ACTA ACUST UNITED AC 2013. [DOI: 10.5623/cig2013-036] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This project explored the feasibility of using video images acquired with an unmanned aerial vehicle (UAV) to obtain three-dimensional (3D) point clouds using structure from motion (SfM) software. Missions were flown using an Aeryon Scout: a lightweight, vertical take-off and landing quadrotor micro UAV with a miniature video camera. The initial mission captured urban scene images that were used to assess system performance while the main mission focused on rock walls where 3D images were used to successfully measure fracture orientations. Point clouds generated from this combination of technologies were sparse, but in the future, improvements in the resolution of original video images would cascade through the processing and improve the overall results. Such a system could have a multitude of applications in the mining industry, contributing to both safety and financial considerations.
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Affiliation(s)
- T. McLeod
- Department of Earth Sciences, Carleton University, Ottawa, Ontario
| | - C. Samson
- Department of Earth Sciences, Carleton University, Ottawa, Ontario
| | - M. Labrie
- Department of Earth Sciences, Carleton University, Ottawa, Ontario
| | - K. Shehata
- Department of Earth Sciences, Carleton University, Ottawa, Ontario
| | - J. Mah
- Department of Earth Sciences, Carleton University, Ottawa, Ontario
| | - P. Lai
- Department of Earth Sciences, Carleton University, Ottawa, Ontario
| | - L. Wang
- Department of Earth Sciences, Carleton University, Ottawa, Ontario
| | - J.H. Elder
- Department of Earth Sciences, Carleton University, Ottawa, Ontario
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Lauridant-Philippin G, Baranzelli MC, Fournier C, Samson C, Soncin F, Bonneterre J. P2-05-08: Expression of VE-Statin/egfl7 in Breast Cancer. Cancer Res 2011. [DOI: 10.1158/0008-5472.sabcs11-p2-05-08] [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: 11/16/2022]
Abstract
Abstract
Patients and methods: Specimens of breast cancer (174 invasive and 37 in situ) were obtained from 205 patients (pts) treated in our institution in 2005.Their median age was 57 years (39-92). VE-statin expression was studied by immunohistochemistry (IHC) using anti-hVE-statin/egfl7 (AF3638, R&D) and by RT-qPCR on formalin-fixed paraffin sections. 174 invasive carcinomas (141 ductular and 30 lobular) and 37 DCIS were studied. Determination was done twice by two different observers. Statistics used Chi2 and Fisher's exact tests for categorical data and Kruskall-Wallis test for continuous variables.
Results: Pathological characteristics of the patients with invasive tumors were as follows: 81% ductular, 17% lobular; median tumor size 18 mm (2-100); SBR grade 1 in 27%, 2 in 58% and 3 in 15% of the tumors; estradiol receptor (ER) + in 90%, progesterone receptor (PR) + in 66%; 6,5% HER2 positive. In 105 cases there was DCIS together with invasive tumors. For invasive tumors and DCIS, progression-free survival (PFS) at 5 years were 85% and 100% and overall survival (OS) 96% and 95%, respectively. Characteristics of the DCIS were median tumor size 18 mm (2-60), ER+ in 88%, PR+ in 62%. IHC results were obtained in 159 invasive carcinoma and 34 DCIS, RT-qPCR results in 96 samples. In the group of invasive tumors, a cytoplasmic VE-statin/egfl7 signal was obtained in 80% of invasive cells, more frequently than in normal glandular cells (71% vs 41%, p=0,003) but significantly less than in peritumoral DCIS (71% vs 89%, p=0,001). The signal was higher in ductular than in lobular carcinoma (85% vs 54%, p=0,003). In RT-qPCR analyses, RNA levels were higher in SBR1 grade tumors (p=0,008), in ER+ invasive tumors (p=0,02) and in pN- tumors (p=0,003). In the group of DCIS, a cytoplasmic signal was obtained in 82% of the cells. It was more frequently observed in tumor than in normal glandular cells (82% vs 52%, p=0,02). A 3+ cytoplasmic signal was more frequent in DCIS alone than in DCIS associated with invasive carcinoma (23% vs 6%, p=0,02). No prognostic significance differences were observed on PFS or on OS.
Discussion: This work is the first expression study of VE-statin/egfl7 in breast cancer. The results were reproduced by two different observers. IHC signal was cytoplasmic and higher in DCIS than in invasive carcinomas. Furthermore the signal was even higher when there was only DCIS than when it was associated with invasive lesion. The signal was higher in ductular than lobular carcinoma, consistent with previous publications on other angiogenesis mediators. Similarly, the signal was higher in low SBR grade, as well in ER positive tumors. Phase 1 studies are ongoing in order to evaluate the effects of inhibition of VE-statin/egfl7.
Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr P2-05-08.
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Affiliation(s)
- G Lauridant-Philippin
- 1Centre Oscar Lambret, Lille, France; Institut de Biologie de Lille — CNRS UMR 8161, Lille, France; Université Lille Nord de France, Lille, France
| | - M-C Baranzelli
- 1Centre Oscar Lambret, Lille, France; Institut de Biologie de Lille — CNRS UMR 8161, Lille, France; Université Lille Nord de France, Lille, France
| | - C Fournier
- 1Centre Oscar Lambret, Lille, France; Institut de Biologie de Lille — CNRS UMR 8161, Lille, France; Université Lille Nord de France, Lille, France
| | - C Samson
- 1Centre Oscar Lambret, Lille, France; Institut de Biologie de Lille — CNRS UMR 8161, Lille, France; Université Lille Nord de France, Lille, France
| | - F Soncin
- 1Centre Oscar Lambret, Lille, France; Institut de Biologie de Lille — CNRS UMR 8161, Lille, France; Université Lille Nord de France, Lille, France
| | - J Bonneterre
- 1Centre Oscar Lambret, Lille, France; Institut de Biologie de Lille — CNRS UMR 8161, Lille, France; Université Lille Nord de France, Lille, France
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Dotson JL, Crandall W, Mousa H, Honegger JR, Denson L, Samson C, Cunningham D, Balint J, Dienhart M, Jaggi P, Carvalho R. Presentation and outcome of histoplasmosis in pediatric inflammatory bowel disease patients treated with antitumor necrosis factor alpha therapy: a case series. Inflamm Bowel Dis 2011; 17:56-61. [PMID: 20645322 DOI: 10.1002/ibd.21378] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [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] [Indexed: 12/09/2022]
Abstract
BACKGROUND Antitumor necrosis factor alpha (aTNF) therapies are commonly used in the treatment of pediatric inflammatory bowel disease (IBD). However, inhibition of the TNF-alpha pathway predisposes to serious infections, including histoplasmosis, which is the most common invasive fungal infection in individuals on aTNF therapy and carries a high mortality rate when associated with delayed diagnosis. Few data exist on the frequency, presentation, and appropriate treatment of pediatric patients with histoplasmosis on aTNF therapy. METHODS Following Institutional Review Board approval, cases were identified then reviewed with their primary gastroenterologist and infectious disease specialists. RESULTS Herein we describe histoplasmosis in five pediatric patients receiving aTNF therapy for IBD in an endemic area. CONCLUSIONS Histoplasmosis is an important complication of treatment with TNF-alpha neutralizing agents. Children with IBD treated with aTNF therapy who develop the infection may present with minimal pulmonary symptoms. While discontinuation of aTNF therapy is important initially, few data exist to determine when and how aTNF therapy can be reinstituted. Recognition of Histoplasma capsulatum is often delayed due to the overlap of symptoms with some of the extraintestinal manifestations of IBD and other more prevalent infectious complications.
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12
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Palmer AS, Snape I, Townsend AT, Stark JS, Samson C, Riddle MJ. Sediment profile characterisation at contaminated and reference locations in the Windmill Islands, East Antarctica. Mar Pollut Bull 2010; 60:1541-1549. [PMID: 20488497 DOI: 10.1016/j.marpolbul.2010.04.013] [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] [Received: 12/14/2009] [Revised: 04/19/2010] [Accepted: 04/23/2010] [Indexed: 05/29/2023]
Abstract
Sediment profiles for pH, Eh, 28 elements, water and organic content are presented here for human impacted and reference locations in the Windmill Islands, East Antarctica. Variations in element concentrations are observed with increasing depth, especially at Brown Bay where the impact of past human activities is most pronounced in the top 10 cm. Spatial differences were observed between sediment profiles at reference and impacted locations and were largely explained by Pb variability in the top 5 cm. Median element concentrations from surface, middle and bottom regions of the sediment profile were compared to composite sample medians (no depth stratigraphy) for 11 elements at O'Brien Bay (reference) and Brown Bay (impacted). Pronounced differences were observed for Brown Bay, particularly surface and middle sections, implying that composite samples dilute the near surface anthropogenic signal by mixing with deeper uncontaminated sediment.
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Affiliation(s)
- A S Palmer
- Australian Antarctic Division, Channel Highway, Kingston 7050, Tasmania, Australia.
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Han X, Gilbert S, Groschwitz K, Hogan S, Jurickova I, Trapnell B, Samson C, Gully J. Loss of GM-CSF signalling in non-haematopoietic cells increases NSAID ileal injury. Gut 2010; 59:1066-78. [PMID: 20584783 PMCID: PMC4296557 DOI: 10.1136/gut.2009.203893] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [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] [Indexed: 01/20/2023]
Abstract
BACKGROUND Administration of granulocyte-macrophage colony stimulating factor (GM-CSF) relieves symptoms in Crohn's disease (CD). It has been reported that reduced GM-CSF bioactivity is associated with more aggressive ileal behaviour and that GM-CSF-null mice exhibit ileal barrier dysfunction and develop a transmural ileitis following exposure to non-steroidal anti-inflammatory drugs (NSAIDs). STAT5 signalling is central to GM-CSF action. It was therefore hypothesised that GM-CSF signalling in non-haematopoietic cells is required for ileal homeostasis. METHODS Bone marrow (BM) chimeras were generated by reconstituting irradiated GM-CSF receptor (gm-csfr) beta chain or GM-CSF (gm-csf) deficient mice with wild type BM (WTBM-->GMRKO and WTBM-->GMKO). Intestinal barrier function and the response to NSAID-induced ileal injury were examined. Expression of gm-csf, gm-csfr or stat5 in Caco-2 and HT-29 intestinal epithelial cell (IEC) lines was knocked down and the effect of GM-CSF signalling on IEC survival and proliferation was determined. RESULTS Elevated levels of GM-CSF autoantibodies in ileal CD were found to be associated with dysregulation of IEC survival and proliferation. GM-CSF receptor-deficient mice and WTBM-->GMRKO chimeras exhibited ileal hyperpermeability. NSAID exposure induced a transmural ileitis in GM-CSF receptor-deficient mice and WTBM-->GMRKO chimeras. Transplantation of wild type BM into GM-CSF-deficient mice prevented NSAID ileal injury and restored ileal barrier function. Ileal crypt IEC proliferation was reduced in WTBM-->GMRKO chimeras, while STAT5 activation in ileal IEC following NSAID exposure was abrogated in WTBM-->GMRKO chimeras. Following knock down of gm-csf, gm-csfr alpha or beta chain or stat5a/b expression in Caco-2 cells, basal proliferation was suppressed. GM-CSF normalised proliferation of Caco-2 cells exposed to NSAID, which was blocked by stat5a/b RNA interference. CONCLUSIONS Loss of GM-CSF signalling in non-haematopoietic cells increases NSAID ileal injury; furthermore, GM-CSF signalling in non-haematopoietic cells regulates ileal epithelial homeostasis via the STAT5 pathway. The therapeutic use of GM-CSF may therefore be beneficial in chronic ileitis associated with CD.
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Affiliation(s)
- Xiaonan Han
- Division of Gastroenterology, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, MLC 2010, 3333 Burnet Avenue, Cincinnati, Ohio 45229, USA.
| | - Shila Gilbert
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Katherine Groschwitz
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Simon Hogan
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Ingrid Jurickova
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Bruce Trapnell
- Division of Pulmonary Biology, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Charles Samson
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Jonathan Gully
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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Soncin F, LeBras A, Samson C, Trentini M, Caetano B, Lelièvre E, Mattot V, Guichard S, Beermann F. 748 Regulation of expression of the VE-statin/egfl7 gene in endothelial cells: a critical role for ETS and GATA factors. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71545-7] [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] Open
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Medansky R, Lepaw MI, Shavin JS, Zimmerman EH, Jones ML, Peets EA, Samson C, Taylor E. Mometasone furoate cream 0.1% vs. hydrocortisone cream 1% in the treatment of seborrhoeic dermatitis. J DERMATOL TREAT 2009. [DOI: 10.3109/09546639209088705] [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: 11/13/2022]
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Han X, Uchida K, Jurickova I, Koch D, Willson T, Samson C, Bonkowski E, Trauernicht A, Kim MO, Tomer G, Dubinsky M, Plevy S, Kugathsan S, Trapnell BC, Denson LA. Granulocyte-macrophage colony-stimulating factor autoantibodies in murine ileitis and progressive ileal Crohn's disease. Gastroenterology 2009; 136:1261-71, e1-3. [PMID: 19230854 PMCID: PMC6326776 DOI: 10.1053/j.gastro.2008.12.046] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [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: 07/21/2008] [Revised: 12/07/2008] [Accepted: 12/18/2008] [Indexed: 01/04/2023]
Abstract
BACKGROUND & AIMS Genetic variations that affect innate immunity increase risk of ileal Crohn's disease (CD). However, the penetrance of susceptibility genes, including NOD2, is low, suggesting additional risk factors. Neutralizing autoantibodies (Ab) against granulocyte-macrophage colony-stimulating factor (GM-CSF Ab) reduce neutrophil antimicrobial function in patients with primary alveolar proteinosis (PAP). We investigated whether GM-CSF Ab regulates neutrophil function in CD. METHODS Serum samples from 354 adult and pediatric patients with inflammatory bowel disease (IBD) were analyzed for GM-CSF Ab and IBD markers. Levels of GM-CSF Ab were compared with patients' CD features and neutrophil function. Intestinal barrier function and nonsteroidal anti-inflammatory drug (NSAID)-induced injury were assessed in GM-CSF-null and NOD2-null mice. RESULTS Median GM-CSF Ab levels increased from 0.4 microg/mL in control serum to 2.4 microg/mL in pediatric CD and 11.7 microg/mL in adult CD serum and were associated with ileal involvement (P<.001). Ileal location, duration of disease, and increased GM-CSF Ab levels were associated with stricturing/penetrating behavior (odds ratio, 2.2; P=.018). The positive and negative predictive values of GM-CSF Ab for stricturing/penetrating behavior were comparable with that of other IBD serum markers. CD patients with increased GM-CSF Ab had reduced neutrophil phagocytic capacity and increased accumulation of pSTAT3+ neutrophils in the affected ileum. GM-CSF-null mice and NOD2-null mice in which GM-CSF was neutralized had defects in mucosal barrier function and developed a transmural ileitis following NSAID exposure. CONCLUSIONS GM-CSF regulates ileal homeostasis in CD and in mouse models. CD patients with increases in serum GM-CSF Ab might benefit from GM-CSF administration.
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Affiliation(s)
- Xiaonan Han
- Gastroenterology, Hepatology, and Nutrition, University of Cincinnati, Cincinnati, OH
| | - Kanji Uchida
- Pulmonary Biology, and Biostatistics, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, University of Cincinnati, Cincinnati, OH
| | - Ingrid Jurickova
- Gastroenterology, Hepatology, and Nutrition, University of Cincinnati, Cincinnati, OH
| | - Diana Koch
- Pulmonary Biology, and Biostatistics, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, University of Cincinnati, Cincinnati, OH
| | - Tara Willson
- Gastroenterology, Hepatology, and Nutrition, University of Cincinnati, Cincinnati, OH,Department of Cancer and Cell Biology, University of Cincinnati, Cincinnati, OH
| | - Charles Samson
- Gastroenterology, Hepatology, and Nutrition, University of Cincinnati, Cincinnati, OH
| | - Erin Bonkowski
- Gastroenterology, Hepatology, and Nutrition, University of Cincinnati, Cincinnati, OH
| | - Anna Trauernicht
- Gastroenterology, Hepatology, and Nutrition, University of Cincinnati, Cincinnati, OH
| | - Mi-Ok Kim
- Center for Epidemiology and Biostatistics, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, University of Cincinnati, Cincinnati, OH
| | - Gitit Tomer
- Gastroenterology, Hepatology, and Nutrition, University of Cincinnati, Cincinnati, OH
| | - Marla Dubinsky
- Department of Pediatrics, Cedar-Sinai Medical Center, Los Angeles, CA
| | - Scott Plevy
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Subra Kugathsan
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Bruce C. Trapnell
- Pulmonary Biology, and Biostatistics, Cincinnati Children’s Hospital Medical Center and the University of Cincinnati College of Medicine, University of Cincinnati, Cincinnati, OH
| | - Lee A. Denson
- Gastroenterology, Hepatology, and Nutrition, University of Cincinnati, Cincinnati, OH,Department of Cancer and Cell Biology, University of Cincinnati, Cincinnati, OH,to whom correspondence should be addressed: MLC 2010, 3333 Burnet Avenue, Cincinnati, OH 45229, Tel: 513-636-7575, Fax: 513-636-5581,
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Raboisson M, Samson C, Ducreux C, Rudigoz R, Gaucherand P, Bouvagnet P, Bozio A. Impact of prenatal diagnosis of transposition of the great arteries on obstetric and early postnatal management. Eur J Obstet Gynecol Reprod Biol 2009; 142:18-22. [DOI: 10.1016/j.ejogrb.2008.09.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2007] [Revised: 07/03/2008] [Accepted: 09/04/2008] [Indexed: 11/27/2022]
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Santiago J, Muszlak M, Samson C, Goulois E, Glorion A, Atale A, Ranaivoarivony V, Hebert JC, Bouvier R, Cordier MP. [Malignancy risk and Wiedemann-Beckwith syndrome: what follow-up to provide?]. Arch Pediatr 2008; 15:1498-502. [PMID: 18674889 DOI: 10.1016/j.arcped.2008.06.009] [Citation(s) in RCA: 4] [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] [Received: 01/11/2008] [Revised: 06/02/2008] [Accepted: 06/17/2008] [Indexed: 12/21/2022]
Abstract
Wiedemann-Beckwith syndrome (WBS) is a syndrome of excessive growing with a high predisposition to developing embryologic tumours within the first years of life. This risk is evaluated between 7.5 and 10%; it varies with the mechanisms of mutations involved. These take place in two distinct domains of 11p15, which are under parental printing. Emerging techniques of cytogenetic and molecular biology now have shown correlations between genotypes and phenotypes, and can identify the 30% of WBS who are especially at risk of developing tumours. A specific follow-up, integrating the specificity of developing tumours of each 11p15 mutations involved, is now proposed to patients with WBS.
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Affiliation(s)
- J Santiago
- Service de pédiatrie, centre hospitalier de Mayotte, BP 04, 97600 Mamoudzou, Mayotte.
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Han X, Jurickova I, Koch D, Willson T, Samson C, Kim MO, Kugathsan S, Trapnell B, Denson L. Sa.122. GM-CSF Autoantibodies and Intestinal Homeostasis in Crohn's Disease. Clin Immunol 2008. [DOI: 10.1016/j.clim.2008.03.343] [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: 12/01/2022]
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Meyre D, Bouatia-Naji N, Vatin V, Veslot J, Samson C, Tichet J, Marre M, Balkau B, Froguel P. ENPP1 K121Q polymorphism and obesity, hyperglycaemia and type 2 diabetes in the prospective DESIR Study. Diabetologia 2007; 50:2090-6. [PMID: 17704904 DOI: 10.1007/s00125-007-0787-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2007] [Accepted: 06/29/2007] [Indexed: 01/22/2023]
Abstract
AIMS/HYPOTHESIS We assessed the predictive value of ectonucleotide pyrophosphatase/phosphodiesterase 1 gene (ENPP1) SNPs with regard to the risk of developing obesity and/or type 2 diabetes in a large French general population. METHODS We genotyped the ENPP1 SNPs K121Q (rs1044498), IVS20delT-11 (rs1799774) and A/G+1044TGA (rs7754561) in 5,153 middle-aged participants of the Data from an Epidemiological Study on the Insulin Resistance Syndrome (DESIR) cohort. RESULTS At baseline, the K121Q polymorphism was not associated either with BMI (p = 0.98) or with class I obesity (odds ratio [OR] 0.99, p = 0.81), but showed a borderline association with class II obesity (OR 1.65, p = 0.02). The K121Q variant was not associated with any trait during the 9-year follow-up. Pooled analyses both at baseline and at follow-up failed to show any association with hyperglycaemia (OR 1.08, p = 0.28) or type 2 diabetes (OR 1.15, p = 0.38). However, we did show an association of the Q121 allele with the risk of hyperglycaemia (OR 1.45, p = 0.001; n = 265) and type 2 diabetes (OR 1.65, p = 0.01; n = 103) in participants reporting a family history of type 2 diabetes. These results did not remain significant after a Bonferroni correction. The IVS20delT-11 and A/G+1044TGA polymorphisms and the three-allele risk haplotype (K121Q, IVS20delT-11 and A-->G+1044TGA [QdelTG]) were not associated with any trait, either at baseline or at follow-up. CONCLUSIONS/INTERPRETATION In a general French population we did not find an association of the QdelTG risk haplotype with adult obesity and type 2 diabetes. We detected nominal evidence of association between the K121Q polymorphism and both severe adult obesity at baseline and the risk of hyperglycaemia or type 2 diabetes in participants with a family history of type 2 diabetes in pooled analyses both at baseline and follow-up.
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Affiliation(s)
- D Meyre
- CNRS 8090-Institute of Biology, Pasteur Institute, Lille, France
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Siddiq A, Gueorguiev M, Samson C, Hercberg S, Heude B, Levy-Marchal C, Jouret B, Weill J, Meyre D, Walley A, Froguel P. Single nucleotide polymorphisms in the neuropeptide Y2 receptor (NPY2R) gene and association with severe obesity in French white subjects. Diabetologia 2007; 50:574-84. [PMID: 17235527 DOI: 10.1007/s00125-006-0555-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2006] [Accepted: 10/20/2006] [Indexed: 10/23/2022]
Abstract
AIMS/HYPOTHESIS Genetic variants of genes for peptide YY (PYY), neuropeptide Y2 receptor (NPY2R) and pancreatic polypeptide (PPY) were investigated for association with severe obesity. SUBJECTS AND METHODS The initial screening of the genes for variants was performed by sequencing in a group of severely obese subjects (n=161). Case-control analysis of the common variants was then carried out in 557 severely obese adults, 515 severely obese children and 1,163 non-obese/non-diabetic control subjects. Rare variants were genotyped in 700 obese children and the non-obese/non-diabetic control subjects (n=1,163). RESULTS Significant association was found for a 5' variant (rs6857715) in the NPY2R gene with both severe adult obesity (p=0.002) and childhood obesity (p=0.02). This significant association was further supported by a pooled allelic analysis of all obese cases (adults and children, n=928) vs the control subjects (n=938) (p=0.0004, odds ratio=1.3, 95% CI 1.1-1.5). Quantitative trait analysis of BMI and WHR was performed and significant association was observed for SNP rs1047214 in NPY2R with an increase in WHR in the severely obese children (co-dominant model p=0.005, recessive model p=0.001). Association was also observed for an intron 3 variant (rs162430) in the PYY gene with childhood obesity (p=0.04). No significant associations were observed for PPY variants. Only one rare variant in the NPY2R gene (C-5641T) was not found in lean individuals and this was found to co-segregate with obesity in one family. CONCLUSIONS/INTERPRETATION These results provide evidence of association for NPY2R and PYY gene variants with obesity and none for PPY variants. A rare variant of the NPY2R gene showed evidence of co-segregation with obesity and its contribution to obesity should be investigated further.
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Affiliation(s)
- A Siddiq
- Section of Genomic Medicine, Imperial College London, Hammersmith Hospital, Du Cane Road, London, W12 0NN, UK
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Smith DL, Samson C, Herd R, Deslauriers A, Sink JE, Christie I, Ernst RE. Measuring the bulk density of meteorites nondestructively using three-dimensional laser imaging. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005je002623] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Leprêtre F, Linton KJ, Lacquemant C, Vatin V, Samson C, Dina C, Chikri M, Ali S, Scherer P, Séron K, Vasseur F, Aitman T, Froguel P. Genetic study of the CD36 gene in a French diabetic population. Diabetes Metab 2004; 30:459-63. [PMID: 15671915 DOI: 10.1016/s1262-3636(07)70143-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVES CD36 is a multifunctional membrane receptor widely expressed in different tissues which binds and internalizes oxidized low-density lipoprotein. In rodents, CD36 gene variations modulate glucose homeostasis and contribute to metabolic syndrome associated with type 2 diabetes but the effects in human are unknown. METHODS We screened the entire coding sequence of the CD36 gene in 272 individuals and we genotyped both rare and frequent variants in 454 T2D subjects and 221 controls. RESULTS We detected five mutations, P191P and N247S were only found each in one family and did not segregate with diabetes, the three others (A/C-178 in the promoter, A/G-10 in intron 3 and (GGGTTGAGA) insertion in intron 13) being equally frequent in diabetic subjects and in controls. However, adiponectin levels, a marker for insulin sensitivity, were significantly associated with the -178 A/C promoter variant allele (p=0.003, p corrected for multiple testing=0.036), possibly reflecting association with insulin-resistance in the French population. CONCLUSION Thus, the -178 A/C SNP promoter mutation in the CD36 gene represents a putative genetic marker for insulin-resistance in the French population, although it does not appear to contribute to the genetic risk for T2D.
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Affiliation(s)
- F Leprêtre
- Institute of Biology-CNRS 8090, Pasteur Institute of Lille, France
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Black D, Bird MA, Hayden M, Schrum LW, Lange P, Samson C, Hatano E, Rippe RA, Brenner DA, Behrns KE. TNFα-induced hepatocyte apoptosis is associated with alterations of the cell cycle and decreased stem loop binding protein. Surgery 2004; 135:619-28. [PMID: 15179368 DOI: 10.1016/j.surg.2003.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 01/21/2023]
Abstract
BACKGROUND Inhibition of nuclear factor kappa B (NF kappa B) during liver regeneration induces hepatocyte apoptosis associated with normal DNA synthesis but decreased mitosis, suggesting that inhibition of NF kappa B impairs progression from S-phase through the G(2)/M phase of the cell cycle. Our aim was to determine if inhibition of NF kappa B alters cell cycle characteristics in hepatocytes treated with tumor necrosis factor alpha (TNF alpha). METHODS Primary hepatocytes from BALB/c mice were infected with adenoviruses expressing luciferase (control; AdLuc) or the I kappa B super-repressor (AdI kappa B) and treated with or without TNF alpha (30 ng/ml). Flow cytometry was performed (0 to 40 hours) to determine apoptosis and cell cycle progression. Reverse transcriptase-polymerase chain reaction and immunoblots assessed changes in cell cycle mediators and antiapoptotic factors. RESULTS Primary hepatocytes treated with AdI kappa B and TNF alpha demonstrated significantly more S-phase cells (14% +/- 3% vs 6% +/- 2%, P<.05) at 14 hours compared with controls. Inhibition of NF kappa B with or without TNFalpha was associated with decreased expression of stem loop bind protein, a marker of cell cycle progression through S-phase. The NF kappa B-induced antiapoptotic proteins, iNOS and TRAF2, had decreased message at 9 and 12 hours, respectively, in TNF alpha- and AdI kappa B-treated cells. CONCLUSION Inhibition of NF kappa B in TNF alpha-treated primary mouse hepatocytes is associated with increased S-phase cell cycle retention and decreased stem loop bind protein.
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Affiliation(s)
- Dalliah Black
- Department of Surgery, University of North Carolina at Chapel Hill, 27599, USA
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Lacquemant C, Chikri M, Boutin P, Samson C, Froguel P. No association between the G482S polymorphism of the proliferator-activated receptor-gamma coactivator-1 (PGC-1) gene and Type II diabetes in French Caucasians. Diabetologia 2002; 45:602-3; author reply 604. [PMID: 12032643 DOI: 10.1007/s00125-002-0783-z] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Boutin P, Vasseur F, Samson C, Wahl C, Froguel P. Routine mutation screening of HNF-1alpha and GCK genes in MODY diagnosis: how effective are the techniques of DHPLC and direct sequencing used in combination? Diabetologia 2001; 44:775-8. [PMID: 11440371 DOI: 10.1007/s001250051687] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIMS/HYPOTHESIS Mutations in the hepatocyte nuclear factor (HNF)-1alpha and glucokinase (GCK) genes are the major causes of monogenic forms of Type II (non-insulin-dependent) diabetes mellitus (Maturity-Onset Diabetes of the Young subtypes, MODY). We evaluated the effectiveness of fluorescent single-strand conformation polymorphism (F-SSCP), denaturing high-performance liquid chromatography (DHPLC) and sequencing based mutation detection in the molecular diagnosis of MODY. Our goal is to identify a rapid, efficient and cost effective mutation detection method for the molecular diagnosis of MODY and other human genetic disorders. METHODS We evaluated the accuracy of DHPLC in screening for MODY 2 and 3 mutations. In addition, we compared the sensitivity, specificity, cost, handling time and analysis time of fluorescent single-strand conformation polymorphism, denaturing high-performance liquid chromatography and direct sequencing screening methods. RESULTS Denaturing high-performance liquid chromatography is a recently developed method for mutation detection. It is cost effective, powerful and reliable and quite suitable for 22 out of the 24 fragments required for MODY 2 and 3 testing. However, exons 1 and 7 of the HNF-1alpha gene are very polymorphic and so direct sequencing is faster as well as more efficient and reliable. CONCLUSION/INTERPRETATION Our results suggest that combining denaturing high-performance liquid chromatography and direct sequencing is a good approach for the routine detection of HNF-1alpha and GCK mutations in MODY families. Denaturing high-performance liquid chromatography appears to be a powerful tool in genetic testing and the method could be applied to the molecular diagnosis of other human genetic diseases.
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Affiliation(s)
- P Boutin
- Department of Human Genetics-CNRS UPRES, CHRU, Pasteur Institute, Lille, France
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Abstract
A 49-year-old man with herpes simplex encephalitis at age 22 was admitted with hypotension (90/60 mm Hg) and hypothermia (33.7 degrees C). His blood pressure was 80-90/50-60 mm Hg, with temperatures averaging 35 degrees C, for at least 3 years before admission. Evaluation of his hypothermia and hypotension revealed a low free triiodothyronine, low normal thyrotropin, luteinizing hormone < 2 mIU/L, follicle stimulating hormone <3 mIU/L, and low testosterone of 1.39 ng/dL. A baseline cortisol of 13.9 microg/dL was stimulated to 41.8 microg/dL with corticotropin, indicating he had partial anterior hypopituitarism with an intact pituitary-adrenal axis. Posterior pituitary function was normal. MRI revealed a "bright" posterior pituitary on a T1-weighted image, further indicating a normal posterior pituitary. Extensive decreased T1-weighting on MRI in the right and left temporal lobes was consistent with encephalomalacia. With thyroid hormone replacement, his blood pressure increased to 110/70 mm Hg with a temperature of 37 degrees C.
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Affiliation(s)
- D L Vesely
- Department of Internal Medicine, University of South Florida for Health Sciences, and James A. Haley Veterans Hospital, Tampa 33612, USA
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Boutin P, Wahl C, Samson C, Vasseur F, Laget F, Froguel P. Big Dye terminator cycle sequencing chemistry: accuracy of the dilution process and application for screening mutations in the TCF1 and GCK genes. Hum Mutat 2000; 15:201-3. [PMID: 10649499 DOI: 10.1002/(sici)1098-1004(200002)15:2<201::aid-humu11>3.0.co;2-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
Children with dermatomyositis may have extensive subcutaneous and intermuscular calcium-laden fluid collections referred to as "milk of calcium." The distinctive MR appearance of such collections in an upper extremity of a 16-year-old girl is presented. MR can differentiate these collections from abscesses and guide appropriate therapy.
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Affiliation(s)
- C Samson
- Department of Radiology, Wayne State University School of Medicine, 3390 John R. Street, Detroit, MI 48201, USA
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Crépault C, Samson C. [Sexual fantasies and sexual dreams: a sexoanalytical exploration]. Contracept Fertil Sex 1999; 27:231-7. [PMID: 10334076] [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: 02/12/2023]
Abstract
Nowadays there are more and more empirical studies of sexual fantasies. Fewer are researches on sexual dreams. Even less common are the data on the relation between sexual fantasies and sexual dreams. A lot of questions can be brought up. Is there a correlation between the frequency in fantasies and sexual dreams? Is there a concordancy or discrepancy between these two? What would be the differences between the persons whom sexual fantasies and dreams concord from those who don't concord? Finally is there an interaction between fantasies and sexual dreams? Based on our preliminary results, we present our mains hypothesis and few illustrations.
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Affiliation(s)
- C Crépault
- Département de Sexologie, Université du Québec à Montréal
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Dabbas M, Jobert-Girot A, Colomb V, de Potter S, Serseau F, Samson C, Goulet O, Ricour C. P.59 Intestinal absorption in children with short bowelsyndrome. Clin Nutr 1998. [DOI: 10.1016/s0261-5614(98)80215-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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De Luca A, Oriolo G, Samson C. Feedback control of a nonholonomic car-like robot. Lecture Notes in Control and Information Sciences 1998. [DOI: 10.1007/bfb0036073] [Citation(s) in RCA: 234] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Couch FJ, Rommens JM, Neuhausen SL, Bélanger C, Dumont M, Abel K, Bell R, Berry S, Bogden R, Cannon-Albright L, Farid L, Frye C, Hattier T, Janecki T, Jiang P, Kehrer R, Leblanc JF, McArthur-Morrison J, Meney D, Miki Y, Peng Y, Samson C, Schroeder M, Snyder SC, Simard J. Generation of an integrated transcription map of the BRCA2 region on chromosome 13q12-q13. Genomics 1996; 36:86-99. [PMID: 8812419 DOI: 10.1006/geno.1996.0428] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
An integrated approach involving physical mapping, identification of transcribed sequences, and computational analysis of genomic sequence was used to generate a detailed transcription map of the 1. 0-Mb region containing the breast cancer susceptibility locus BRCA2 on chromosome 13q12-q13. This region is included in the genetic interval bounded by D13S1444 and D13S310. Retrieved sequences from exon amplification or hybrid selection procedures were grouped into physical intervals and subsequently grouped into transcription units by clone overlap. Overlap was established by direct hybridization, cDNA library screening, PCR cDNA linking (island hopping), and/or sequence alignment. Extensive genomic sequencing was performed in an effort to understand transcription unit organization. In total, approximately 500 kb of genomic sequence was completed. The transcription units were further characterized by hybridization to RNA from a series of human tissues. Evidence for seven genes, two putative pseudogenes, and nine additional putative transcription units was obtained. One of the transcription units was recently identified as BRCA2 but all others are novel genes of unknown function as only limited alignment to sequences in public databases was observed. One large gene with a transcript size of 10.7 kb showed significant similarity to a gene predicted by the Caenorhabditis elegans genome and the Saccharomyces cerevisiae genome sequencing efforts, while another contained a motif sequence similar to the human 2',3' cyclic nucleotide 3' phosphodiesterase gene. Several retrieved transcribed sequences were not aligned into transcription units because no corresponding cDNAs were obtained when screening libraries or because of a lack of definitive evidence for splicing signals or putative coding sequence based on computational analysis. However, the presence of additional genes in the BRCA2 interval is suggested as groups of putative exons and hybrid selected clones that were transcribed in consistent orientations could be localized to common physical intervals.
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Affiliation(s)
- F J Couch
- Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA
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Abstract
BACKGROUND The study was conducted to determine the influences of laparoscopy in the management and outcome of patients with appendicitis. METHODS A retrospective analysis of 154 consecutive patients who were treated for suspected appendicitis. The pre-operative diagnosis included appendicitis, right lower quadrant pain of unknown etiology, and generalized peritonitis. RESULTS Laparoscopy was used in 108 patients, including 70 laparoscopic appendectomies (LA) and 31 LAs converted to open appendectomy (OA). Forty-six patients had OA. The average operating time for LA was 74.3 minutes and 48.8 minutes with OA. Postoperative complications for LA (7%) included 1 trochar wound hemorrhage, 2 wound infections, and 2 intra-abdominal sepsis; and for OA (9%) were 1 post-operative intra-abdominal hemorrhage, 4 wound infections, 1 wound dehiscence, and 1 intra-abdominal sepsis. Post-operative stay for LA averaged 2.5 days and for OA averaged 4.5 days (P = .0049). LA patients had a considerably faster return to work and/or normal activity than OA patients (P = .00065). CONCLUSIONS Laparoscopy influenced the management of 29% of patients presenting with suspected appendicitis. LA resulted in shorter hospitalization and a more rapid return to work and/or normal activity than OA.
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Affiliation(s)
- O N Panton
- Department of Surgery, Delta Hospital, British Columbia, Canada
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Tavtigian SV, Simard J, Rommens J, Couch F, Shattuck-Eidens D, Neuhausen S, Merajver S, Thorlacius S, Offit K, Stoppa-Lyonnet D, Belanger C, Bell R, Berry S, Bogden R, Chen Q, Davis T, Dumont M, Frye C, Hattier T, Jammulapati S, Janecki T, Jiang P, Kehrer R, Leblanc JF, Mitchell JT, McArthur-Morrison J, Nguyen K, Peng Y, Samson C, Schroeder M, Snyder SC, Steele L, Stringfellow M, Stroup C, Swedlund B, Swense J, Teng D, Thomas A, Tran T, Tranchant M, Weaver-Feldhaus J, Wong AK, Shizuya H, Eyfjord JE, Cannon-Albright L, Tranchant M, Labrie F, Skolnick MH, Weber B, Kamb A, Goldgar DE. The complete BRCA2 gene and mutations in chromosome 13q-linked kindreds. Nat Genet 1996; 12:333-7. [PMID: 8589730 DOI: 10.1038/ng0396-333] [Citation(s) in RCA: 546] [Impact Index Per Article: 19.5] [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: 01/31/2023]
Abstract
Breast carcinoma is the most common malignancy among women in developed countries. Because family history remains the strongest single predictor of breast cancer risk, attention has focused on the role of highly penetrant, dominantly inherited genes in cancer-prone kindreds (1). BRCA1 was localized to chromosome 17 through analysis of a set of high-risk kindreds (2), and then identified four years later by a positional cloning strategy (3). BRCA2 was mapped to chromosomal 13q at about the same time (4). Just fifteen months later, Wooster et al. (5) reported a partial BRCA2 sequence and six mutations predicted to cause truncation of the BRCA2 protein. While these findings provide strong evidence that the identified gene corresponds to BRCA2, only two thirds of the coding sequence and 8 out of 27 exons were isolated and screened; consequently, several questions remained unanswered regarding the nature of BRCA2 and the frequency of mutations in 13q-linked families. We have now determined the complete coding sequence and exonic structure of BRCA2 (GenBank accession #U43746), and examined its pattern of expression. Here, we provide sequences for a set of PCR primers sufficient to screen the entire coding sequence of BRCA2 using genomic DNA. We also report a mutational analysis of BRCA2 in families selected on the basis of linkage analysis and/or the presence of one or more cases of male breast cancer. Together with the specific mutations described previously, our data provide preliminary insight into the BRCA2 mutation profile.
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Rommens JM, Durocher F, McArthur J, Tonin P, LeBlanc JF, Allen T, Samson C, Ferri L, Narod S, Morgan K. Generation of a transcription map at the HSD17B locus centromeric to BRCA1 at 17q21. Genomics 1995; 28:530-42. [PMID: 7490091 DOI: 10.1006/geno.1995.1185] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [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: 01/25/2023]
Abstract
A detailed transcription map of the 320-kb region containing the HSD17B locus on chromosome 17 was generated. Thirty unique cDNA fragments, retrieved following the hybridization of immobilized YACs to primary pools of cDNAs prepared from RNA of mammary gland, ovary, placenta, and the Caco-2 cell line, were aligned into 10 transcription units by physical mapping and hybridization to RNAs of a series of tissues. The cDNAs were then further characterized by sequencing and used to screen mammary gland cDNA libraries. Fragments corresponding to the broadly expressed gamma-tubulin and Ki antigen genes were identified. A full-length cDNA clone encoding a 117-amino-acid protein homologous to the rat ribosomal protein L34 was isolated. Portions of genes with restricted patterns of expression were also obtained, including the previously characterized HSD17B1. One new gene, for which a full-length cDNA was isolated, was found to have an interesting tissue-specific pattern of expression with abundant mRNA in both the colon and the testis and in the mammary carcinoma cell line BT-474. This contrasted with the barely detectable level observed in several tissues including normal mammary gland. Of the five additional transcription units identified, one showed no similarity, two showed identity to human expressed sequences, and two displayed similarity to genes of animal species by amino acid alignment. These latter cDNA clones include potential homologues of a rat nuclear tyrosine phosphatase and of a factor of Drosophila that is known to be involved in the negative regulation of transcription of segment identity genes.
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Affiliation(s)
- J M Rommens
- Department of Genetics, Hospital for Sick Children, University of Toronto, Ontario, Canada
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Simard J, Tonin P, Durocher F, Morgan K, Rommens J, Gingras S, Samson C, Leblanc JF, Bélanger C, Dion F. Common origins of BRCA1 mutations in Canadian breast and ovarian cancer families. Nat Genet 1994; 8:392-8. [PMID: 7894492 DOI: 10.1038/ng1294-392] [Citation(s) in RCA: 226] [Impact Index Per Article: 7.5] [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: 01/27/2023]
Abstract
Women who carry mutations in the BRCA1 gene on chromosome 17q have an 85% lifetime risk of breast cancer, and a 60% risk of ovarian cancer. We have identified BRCA1 mutations in 12 of 30 (40%) Canadian families with breast and/or ovarian cancer, including six of the eight families (75%) that contained two cases of early-onset breast cancer and two cases of ovarian cancer. Six frameshift mutations account for all 12 mutant alleles, including nucleotide insertions (two mutations) and deletions (four mutations). Four independent families carried the same 1 basepair (bp) insertion mutation in codon 1755 and four other families shared a 2 bp deletion mutation in codons 22-23. These families were not known to be related, but haplotype analysis suggests that the carriers of each of these mutations have common ancestors.
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Affiliation(s)
- J Simard
- Laboratory of Molecular Endocrinology, CHUL Research Center, Quebec, Canada
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41
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Affiliation(s)
- C. Canudas de Wit
- Laboratoire d'Automatique de Grenoble, URA CNRS 228, ENSIEG, BP 46, 38402, Saint Martin D'Heres, France
| | - H. Khennouf
- Laboratoire d'Automatique de Grenoble, URA CNRS 228, ENSIEG, BP 46, 38402, Saint Martin D'Heres, France
| | - C. Samson
- INRIA, Route des Lucioles, 06902 Sophia-Antipolis, France
| | - O. J. Sordalen
- The Norwegian Institute of Technology, Dept. of Engineering Cybernetics, Trondheim, Norway
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Samson C. [The evolution of the nursing profession]. Rev Infirm 1992; 42:26-8. [PMID: 1293718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Abstract
OBJECTIVE To determine the effects of HIV-1 antibody level and test-format characteristics on testing pooled sera. DESIGN This study was designed with a laboratory exercise followed by test observations on serosurveillance samples. METHODS Sera with low, medium and high (n = 22, 12 and 20, respectively) antibody titers were pooled with HIV-1-negative sera and tested with two enzyme-linked immunosorbent assays (ELISA) and a particle agglutination test. The same kits were used to test single and pooled (batches of five, 10 and 20) samples collected from 3000 blood donors and sex workers. These samples were then seeded with 50 varying antibody-containing sera and similarly tested. Initial reactivities, sensitivities, and specificities for all test kits were calculated and compared. RESULTS In the laboratory exercise, all reactive pools of five were detected. False-negative pools in batches of 10 and 20 with low antibody titers were noted with one or both ELISA, but not with the particle agglutination method. Testing 3000 samples revealed three confirmed reactive samples and 100% sensitivity/specificity for all kits, for both single and pooled sera testing. Increased initial reactivity (IR) was noted for the two ELISA. Examinations of pools of the seeded 3000 samples with the two ELISA showed false-negative reactivity with pools of 10 and 20 when pools contained low antibody sera (sensitivities and specificities of 92-97.9% and 98.1-100%, respectively). Again, increased IR was seen with the ELISA. False-negative pool and increased IR was not seen with the agglutination test (sensitivity/specificity 100%). CONCLUSIONS We recommend the use of the particle agglutination assay for testing pooled sera of batches of 20 or less. Components of reactive pools should then be tested and reactive samples should undergo supplementary testing. Pooled samples tested by ELISA should not exceed five per batch. Retesting of reactive pools, testing of its components, and supplemental test(s) of reactive sera should then follow. The optimum pool size for most laboratories is five, with the best technical and economic performance seen with the particle agglutination assay.
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Affiliation(s)
- O T Monzon
- Department of Health Research Institute for Tropical Medicine, Metro Manila, Philippines
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Thomas DW, Samson C, Bergeron JM. Metabolic Costs Associated with the Ingestion of Plant Phenolics by Microtus pennsylvanicus. J Mammal 1988. [DOI: 10.2307/1381342] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Constad WH, Fiore P, Samson C, Cinotti AA. Use of an angiotensin converting enzyme inhibitor in ocular hypertension and primary open-angle glaucoma. Am J Ophthalmol 1988; 105:674-7. [PMID: 3287943 DOI: 10.1016/0002-9394(88)90063-3] [Citation(s) in RCA: 54] [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] [Indexed: 01/05/2023]
Abstract
We studied the effects of a new topical angiotensin converting enzyme inhibitor, SCH 33861, in lowering intraocular pressure in 20 patients with ocular hypertension or primary open-angle glaucoma. In a double-masked, four-way crossover study with placebo and timolol, SCH 33861 was well tolerated and effective in lowering intraocular pressure. The magnitude of the drug's effect in lowering intraocular pressure was less than that of timolol 0.5%.
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Affiliation(s)
- W H Constad
- Department of Ophthalmology, University of Medicine and Dentistry of New Jersey, Newark
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Weston WL, Fennessey PV, Morelli J, Schwab H, Mooney J, Samson C, Huff L, Harrison LM, Gotlin R. Comparison of hypothalamus-pituitary-adrenal axis suppression from superpotent topical steroids by standard endocrine function testing and gas chromatographic mass spectrometry. J Invest Dermatol 1988; 90:532-5. [PMID: 3351336 DOI: 10.1111/1523-1747.ep12461062] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [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: 01/05/2023]
Abstract
We evaluated 38 males who had psoriasis vulgaris for evidence of hypothalamus-pituitary-adrenal axis suppression (HPAS) during treatment with superpotent topical glucocorticosteroids. All men were treated with 49 g per week of either Betamethasone Diproprionate in an optimized vehicle or Clobetasol Proprionate ointment. Three methods used to assess HPAS were compared. Classic 8 a.m. plasma cortisol measurements, urinary-free cortisol, and 17-hydroxycorticosteroid determinations and gas chromatograph-mass spectrometry (GCMS) quantitation of urinary cortisol metabolites were compared. Values for all methods were obtained just prior to therapy and at days 4, 7, 14, and 21 during therapy and at day 28 after treatment was stopped for 7 d. Plasma cortisol measurements correlated well with other measures of HPAS. GCMS determination of urinary cortisol metabolites was slightly more sensitive at detecting HPAS than the other two methods. Persistent HPAS after day 7 was only appreciated by GCMS. Urinary-free cortisol and 17-hydroxycortisol was the least sensitive of the three methods. Analysis of urinary cortisol metabolites by GCMS may be most useful in the monitoring of HPAS resulting from use of topical glucocorticosteroid preparations.
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Affiliation(s)
- W L Weston
- Department of Dermatology, Pharmacology, and Pediatrics, University of Colorado School of Medicine, Denver 80262
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Coulaud JP, Binet D, Voyer C, Samson C, Moreau G, Rossignol JF. [Treatment of the cutaneous larva migrans syndrome "Larbish" with albendazole. Apropos of 18 cases]. Bull Soc Pathol Exot Filiales 1982; 75:534-7. [PMID: 7165902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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50
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Coulaud JP, Méchali D, Le Mercier Y, Samson C. [Imported malaria in a tropical unit in Paris. About 100 cases (author's transl)]. Ann Med Interne (Paris) 1979; 130:693-6. [PMID: 395872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
From a hundred cases of imported malaria observed in Paris, the authors emphasize the following points: annual increase of cases, lack or inadequacy of prophylaxis, frequent reinfestations among black africans living in France, and comming back in endemic area for a brief journey, high risks for pregnant women.
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