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Pohl J, Lotterer E, Balzer C, Sackmann M, Schmidt KD, Gossner L, Schaab C, Frieling T, Medve M, Mayer G, Nguyen-Tat M, Ell C. Computed virtual chromoendoscopy versus standard colonoscopy with targeted indigocarmine chromoscopy: a randomised multicentre trial. Gut 2009; 58:73-8. [PMID: 18838485 DOI: 10.1136/gut.2008.153601] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Colonoscopy is the accepted gold standard for screening of neoplastic colorectal lesions, but the substantial miss rate remains a challenge. Computed virtual chromoendoscopy with the Fujinon intelligent colour enhancement (FICE) system is a new dyeless imaging technique that might allow higher rates of adenoma detection. METHODS This is a prospective randomised five tertiary care centre trial of colonoscopy in the FICE mode versus standard colonoscopy with targeted indigocarmine chromoscopy (control group) in consecutive patients attending for routine colonoscopy. Histopathology of detected lesions was confirmed by evaluation of endoscopic resection or biopsy specimens. RESULTS 871 patients were enrolled, and 764 patients (344 female, mean age 64 years) were subjected to final analysis (368 in the FICE group, 396 in the control group). In total, 236 adenomas (mean of 0.64 per case) were detected in the FICE group and 271 adenomas (mean of 0.68 per case) in the control group (p = 0.92). There was no statistically significant difference in the percentage of patients with >or=1 adenoma between the control group (35.4%) and the FICE group (35.6%) (p = 1.0). For the differential diagnosis of adenomas and non-neoplastic polyps, the sensitivity of FICE (92.7%) was comparable with that of indigocarmine (90.4%) (p = 0.44). CONCLUSIONS At colonoscopy, adenoma detection rates are not improved by virtual chromoendoscopy with the FICE system compared with white light endoscopy with targeted indigocarmine spraying. However, FICE can effectively substitute for chromoscopy concerning the differentiation of neoplastic and non-neoplastic lesions.
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Mayer G, Kesper K, Stiasny-Kolster K. 28. Quantification of muscle tone in patients with REM sleep behavior disorder. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.07.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Müller J, Freitag D, Mayer G, Pötzsch B. Anticoagulant characteristics of HD1-22, a bivalent aptamer that specifically inhibits thrombin and prothrombinase. J Thromb Haemost 2008; 6:2105-12. [PMID: 18826387 DOI: 10.1111/j.1538-7836.2008.03162.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND HD1-22 is a bivalent aptamer that binds to thrombin with high affinity (K(d) = 0.65 nm) and occupies both anion binding exosites without blocking the active centre of the enzyme. HD1-22 has been developed by connecting the exosite 1 binding aptamer HD1 and the exosite 2 binding aptamer HD22 through a poly-dA linker. OBJECTIVES To characterize the anticoagulant profile of HD1-22 in comparison to the clinically established direct acting thrombin inhibitors bivalirudin and argatroban, and to test the efficacy of antidote-oligodeoxynucleotides. METHODS AND RESULTS HD1-22 prolongs clotting times of the thrombin time, activated partial thromboplastin time, ecarin clotting time, and lag-time of the tissue factor triggered thrombin generation assay in a dose-dependent manner. On a molar basis, its anticoagulant activity was nearly identical to bivalirudin and superior to argatroban. Thrombin-induced platelet aggregation was more effectively inhibited by HD1-22 than by bivalirudin. The HD1-22 aptamer retains the ability of the HD1-moiety to bind to (pro)exosite 1 of prothrombin and inhibits the prothrombinase activity nearly 2-fold better than HD1. The anticoagulant activities of HD1-22 are fully reversed by addition of antidote-oligodeoxynucleotides. CONCLUSIONS The strong thrombin-inhibiting activity, together with the availability of a rapid acting antidote strategy, makes HD1-22 an interesting anticoagulant candidate, especially for use in clinical situations where effective anticoagulation and rapid reversal of the anticoagulant effect are required. The data obtained warrant further clinical studies.
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Brunner J, Freund M, Prelog M, Binder E, Sailer-Höck M, Jungraithmayr T, Mayer G, Zimmerhackl LB. Rituximab is a therapeutical option for juvenile microscopic polyangiitis. Pediatr Rheumatol Online J 2008; 6. [PMCID: PMC3334076 DOI: 10.1186/1546-0096-6-s1-p268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Reese J, Happe S, Peglau I, Mayer G, Wasem J, Giani G, Geraedts M, Trenkwalder C, Stiasny-Kolster K, Dodel R. Economic burden and health-related quality of life in restless legs syndrome. AKTUELLE NEUROLOGIE 2008. [DOI: 10.1055/s-0028-1086797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Mayer G, Dodel R, Heitmann J. Praxis der Versorgung von Patienten mit schlafbezogenen Atmungsstörungen unter besonderer Berücksichtigung gesundheitsökonomischer Aspekte – Geplantes multizentrisches Projekt. Pneumologie 2008. [DOI: 10.1055/s-0028-1083112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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107
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Mayer G. Zur Bedeutung apnoe-assoziierter Arousal bei Bewegungsstörungen, Parasomnien und neurologischen Erkrankungen. Pneumologie 2008. [DOI: 10.1055/s-0028-1083127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cathomas R, Köberle D, Ruhstaller T, Mayer G, Räss A, von Moos R. Heated oxaliplatin infusion (37°C) in combination with capecitabine for metastatic colorectal cancer: Can it reduce oxaliplatin-associated neuropathy? J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.20660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Fonin M, Mayer G, Biegger E, Janßen N, Beyer M, Thomay T, Bratschitsch R, Dedkov YS, Rüdiger U. Defect induced ferromagnetism in Co-doped ZnO thin films. ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1742-6596/100/4/042034] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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111
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Imre AR, Mayer G, Házi G, Rozas R, Kraska T. Estimation of the liquid-vapor spinodal from interfacial properties obtained from molecular dynamics and lattice Boltzmann simulations. J Chem Phys 2008; 128:114708. [DOI: 10.1063/1.2837805] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mayer G. [Experimental studies in animals on interfragmentary pressure in osteosyntheses with external bone fixation and compression (author's transl)]. ZEITSCHRIFT FUR ORTHOPADIE UND IHRE GRENZGEBIETE 2008; 118:311-9. [PMID: 7415425 DOI: 10.1055/s-2008-1053511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The article reports on the measurement of static compression during the consolidation phase of tibia osteotomies in sheep. Nail-fixed and wire-fixed compression and distraction devices were used for external stabilization. During the 8-week study period, the magnitude of the interfragmentary pressure and its changes were measured via pressure meter units. The links between the extent of interfragmentary tension and the degree of stability of osteosynthesis, are explained, and attention is also drawn to the differences in the stability performance of the nail-fixed and wire-fixed compression and distraction devices used in the animal experiments.
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Mayer G, Kesper K, Stiasny-Kolster K. Quantification of muscle tone in patients with REM sleep behavior disorder. KLIN NEUROPHYSIOL 2008. [DOI: 10.1055/s-2008-1072823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hochegger K, Perco P, Enrich J, Mayer B, Mayer G, Rosenkranz AR, Rudnicki M. In vitro--transcriptional response of polymorphonuclear leukocytes following contact with different antigens. Eur J Clin Invest 2007; 37:860-9. [PMID: 17931381 DOI: 10.1111/j.1365-2362.2007.01872.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Background Human polymorphonuclear neutrophils (PMN) are activated and undergo apoptosis if brought into contact with cuprophane haemodialysis membranes, a phenomenon not observed if more 'biocompatible' polysulfone dialysers are used. It remains yet to be defined if this differential response is due to mechanisms regulated on a transcriptional or protein level. Furthermore, it is not clear if the contact of PMN with membranes ('frustrated' phagocytosis) activates the same response as phagocytosis of bacteria (complete phagocytosis). Materials and methods We performed a genome-wide differential gene expression study using cDNA microarrays to analyse the impact of different dialysis fibres on the transcriptional response of PMN of human healthy volunteers. These results were compared to transcriptional response of PMN during phagocytosis of Escherichia coli. Results We did not detect significant differences in gene expression between PMN stimulated with cuprophane or pulysulfone. Compared to unstimulated PMN the 'frustrated' phagocytosis of either dialysis membrane resulted in increased expression of 50 genes, with a marked up-regulation of FOS - and JUN - transcripts, but with only little activation of immune response genes, and virtually no activation of apoptosis related RNA transcripts. In contrast, phagocytosis of E.coli was associated with a striking up-regulation of 88 genes, most of them involved in pro- and antiapoptotic pathways, immune response and activation of nuclear factor kappa B and inhibitor of NF-kappa B. Conclusions Our results suggest that the response of PMN to artificial surfaces is not controlled on transcriptional level. Complete and 'frustrated' phagocytosis activate markedly distinct transcriptional regulatory pathways in PMN.
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Kesper K, Mayer G, Ploch T, Koehler U. Muskelaktivität im REM-Schlaf bei idiopathischer RBD und Narkolepsie mit RBD. Pneumologie 2007. [DOI: 10.1055/s-2007-985693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Mayer G. Komorbidität internistischer Erkrankungen bei Narkolepsie. Pneumologie 2007. [DOI: 10.1055/s-2007-985694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Mayer G. Organ allocation systems and management of the renal transplant waiting list. Pril (Makedon Akad Nauk Umet Odd Med Nauki) 2007; 28:283-290. [PMID: 17932474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In 1996 the EUROTRANSPLANT organisation, which currently includes the member-states Austria, Belgium, Germany, Luxemburg, the Netherlands and Slovenia, changed its policy of renal donor organ allocation to the new algorithm ETKAS (Eurotransplant Kidney Allocation System). Its main goal was to shorten the average and maximum waiting time, adjust for rare HLA phenotypes and homozygosities, achieve a reasonably balanced exchange rate among countries with variable organ procurement rates and guarantee an acceptable HLA match distribution and a optimal overall transplant success rate. Several additions have been introduced since then such as the Eurotransplant Senior Programme, which allocates kidneys from donors older than 65 years to recipients over the age of 65. Due to constant refinement the system has achieved its major goals.
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Joannidis M, Rauchenzauner M, Leiner B, Rosenkranz A, Ebenbichler CF, Laimer M, Tatarczyk T, Meusburger E, Mayer G. Effect of intradialytic parenteral nutrition in patients with malnutrition–inflammation complex syndrome on body weight, inflammation, serum lipids and adipocytokines: results from a pilot study. Eur J Clin Nutr 2007; 62:789-95. [PMID: 17522619 DOI: 10.1038/sj.ejcn.1602777] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Evaluation of the influence of intradialytic parenteral nutrition (IDPN) in patients suffering from Malnutrition-Inflammation Complex Syndrome (MICS) on nutritional status, inflammation, adipocytokines and serum lipids. SUBJECTS Six patients with MICS were assigned to IDPN, whereas six patients matched for age, sex, body mass index (BMI) and co-morbidity without malnutrition served as controls. Patients were recruited from Outpatient Dialysis Unit, Medical University Innsbruck and from Dialysis Unit, Hospital Feldkirch. RESULTS In all patients with IDPN, dry body weight increased during the interventional period whereas body weight remained stable in patients without IDPN. Tumor necrosis factor (TNF)-alpha levels were higher in patients with MICS compared with controls at all time points. Total cholesterol, LDL- and HDL-levels significantly increased during dialysis at all time points in controls but not in patients with MICS. Albumin, C-reactive protein, interleukin-6 (IL-6), soluble interleukin-2 receptor (sIL-2R) and adipocytokines did not differ between patients and controls during the study period. CONCLUSIONS IDPN in patients with MICS increases body weight despite not influencing inflammatory status. Furthermore, IDPN does not induce a pro-atherogenic lipid composition enhancing the risk for atherosclerosis. Thus, IDPN is a safe and effective treatment of malnutrition in patients with MICS.
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Walter SL, Flinn BD, Mayer G. Effects of loading rate on the mechanical behavior of a natural rigid composite. Acta Biomater 2007; 3:377-82. [PMID: 17166783 DOI: 10.1016/j.actbio.2006.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2006] [Revised: 08/10/2006] [Accepted: 09/26/2006] [Indexed: 10/23/2022]
Abstract
The effects of loading rate variations on the stress-strain behavior, failure mechanisms, fracture modes, and energy-dissipating capability of the spicules of the sponge Euplectella aspergillum have been investigated. Comparisons were made with similar measurements on a silicate glass. It was concluded that the very thin (5-10nm) organic layers that are interspersed with thicker layers of hydrated silica in the concentric ring structure of the spicules strongly influence all aspects of the mechanical behavior.
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Walter S, Flinn B, Mayer G. Mechanisms of toughening of a natural rigid composite. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2007. [DOI: 10.1016/j.msec.2006.05.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Stiasny-Kolster K, Clever SC, Möller JC, Oertel WH, Mayer G. Olfactory dysfunction in patients with narcolepsy with and without REM sleep behaviour disorder. Brain 2007; 130:442-9. [PMID: 17235125 DOI: 10.1093/brain/awl343] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Patients with idiopathic rapid eye movement sleep behaviour disorder (RBD) frequently develop Parkinson's disease and the majority present with hyposmia, which is a potential preclinical non-motor sign of Parkinson's disease. Accordingly, it has been proposed that the clinical symptoms of hyposmia and RBD in combination have to be considered as very early symptoms of Parkinson's disease. Since not only patients with idiopathic RBD but also patients in whom RBD is associated with narcolepsy present with an olfactory dysfunction we investigated if hyposmia in RBD patients with concomitant narcolepsy is RBD specific or if narcolepsy per se is associated with olfactory dysfunction. We studied olfactory function in 20 narcoleptic patients each with RBD (9 male and 11 female; mean age 45.4 +/- 14.0 years, range 20-75 years) and without associated RBD (8 male and 12 female; mean age 44.4 +/- 13.40 years, range 20-70 years) and 40 age- and gender-matched healthy control subjects using standardized 'Sniffin' Sticks'. Both, narcoleptics with (Narc/+RBD) and without RBD (Narc/-RBD) had a significantly higher olfactory threshold (Narc/+RBD, P = 0.0001; Narc/-RBD, P = 0.0001), lower discrimination scores (P = 0.001; P = 0.014) and lower identification scores (P = 0.057; P = 0.003) than controls. There were no symptoms or signs for early parkinsonism in both patient groups. Our results show for the first time that narcolepsy per se is associated with olfactory dysfunction. In contrast to patients with idiopathic RBD, hyposmia in patients with RBD associated with narcolepsy is unlikely to be a predictor for developing parkinsonism.
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Mayer G, Leonhardt E, Kesper K, Penzel T, Ploch T. O0023 Phasic and tonic muscle activity during REM sleep in RBD. Sleep Med 2007. [DOI: 10.1016/s1389-9457(07)70209-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Papaxanthos-Roche A, Deminière C, Bauduer F, Hocké C, Mayer G, Lacombe D. Azoospermia as a new feature of Fabry disease. Fertil Steril 2007; 88:212.e15-8. [PMID: 17261284 DOI: 10.1016/j.fertnstert.2006.11.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Revised: 11/09/2006] [Accepted: 11/09/2006] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To describe two cases of azoospermia in men with Fabry disease. DESIGN Case report. SETTING Centre hospitalier universitaire, maternité Pellegrin, Bordeaux, France. PATIENT(S) Two infertile men with azoospermia and with Fabry disease. INTERVENTION Testicular biopsies. MAIN OUTCOME MEASURE Histological and electron microscopy analysis of testicular biopsies. RESULT(S) Testicular biopsies revealed characteristic aspects of trihexosid ceramid deposits in Leydig cells by optical and electronic microscopic analysis. Using testicular sperm extraction and intracytoplasmic sperm injection, sperm retrieval led to pregnancies and deliveries of healthy children. CONCLUSION(S) Azoospermia should be considered as a possible complication of Fabry disease. We recommend a routine sperm analysis in the follow-up of young patients with Fabry disease. Azoospermia was still present after 4 years of agalsidase-beta therapy. Because we do not know the efficacy of agalsidase therapy on the genital involvement in Fabry disease, sperm cryopreservation is recommended.
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Kotterba S, Orth M, Happe S, Mayer G. Begutachtung der Tagesschläfrigkeit bei neurologischen Erkrankungen und dem obstruktiven Schlafapnoesyndrom (OSAS). DER NERVENARZT 2007; 78:861-70. [PMID: 17253086 DOI: 10.1007/s00115-006-2191-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Patients with increased daytime sleepiness are impaired in all areas of their social environment. Expert opinions are recommended for pension proceedings, regarding driving licenses as well as for restrictions at the workplace. All possibilities should be considered in the differential diagnosis of sleep disorders, which have to be treated before an expert opinion is submitted. Statutory regulations on evaluation of sleepiness are contained in the guidelines for assessing a patient's fitness to drive. The importance of daytime sleepiness in other occupations should be assessed according to the respective workplace. The patient should be informed of the appraisal with regard to career choice and workplace design. The expert thus has the responsible task of carrying out interdisciplinary differential diagnosis of pathological sleepiness and monitoring treatment success with appropriate test methods. In the present paper the legal guidelines in Germany and available test methods are presented.
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Dodel R, Stiasny-Kolster K, Peglau I, Mayer G, Giani G, Geraedts M, Trenkwalder C, Happe S. The Economic Impact of Restless Legs Syndrome. Pneumologie 2007. [DOI: 10.1055/s-2007-973405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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