A Schäfer

University of Wuerzburg, Würzburg, Bavaria, Germany

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Publications (39)289.76 Total impact

  • S Heckl · C Reiners · A K Buck · A Schäfer · A Dick · M Scheurlen ·
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    ABSTRACT: Background/objectives: Hashimoto's thyroiditis (HT) represents a wide-spread autoimmune disease. In euthyroid patients with HT, an impaired assimilation of common carbohydrates has been observed. Our objectives were to compare the frequency of (1) fructose (FM), lactose (LM) and sorbitol malassimilation (SM), (2) gastrointestinal symptoms (GS) following carbohydrate ingestion and (3) recurrent GS relevant to the participants' daily lives. Subjects/methods: We conducted a prospective case-control study of 45 ambulatory patients with HT and 38 healthy volunteers, matched with regard to age, gender and area of origin. Hydrogen breath tests with fructose, lactose, sorbitol and glucose were performed, the lactose testing additionally comprising measurements of capillary blood glucose (cBG). GS during the tests and recurrent GS concerning the participants' daily lives were assessed. A food-frequency questionnaire was administered. Results: FM was diagnosed in 48.9% of patients compared with 26.3% of the control group (P=0.035). In all, 42.2% of patients with HT and 21.1% of healthy controls showed LM (P=0.04). FM and/or LM was present in 73.3% of the patients and in 42.1% of healthy controls (P=0.004). GS after the ingestion of fructose (P=0.003) or lactose (P=0.025) and recurrent GS were significantly more prevalent in the case group. The consumption of free fructose, lactose or sorbitol did not differ. Conclusions: Carbohydrate malassimilation and gastrointestinal complaints are frequent in euthyroid patients with HT, leading to novel clinical and pathophysiological considerations and concepts.European Journal of Clinical Nutrition advance online publication, 7 October 2015; doi:10.1038/ejcn.2015.167.
    European journal of clinical nutrition 10/2015; DOI:10.1038/ejcn.2015.167 · 2.71 Impact Factor
  • Arne Schäfer · Michael R Kraus · Michael Scheurlen ·

    Hepatology 08/2014; 60(1):431-2. · 11.06 Impact Factor
  • Arne Schäfer · Michael R Kraus · Michael Scheurlen ·

    Hepatology 10/2013; DOI:10.1002/hep.26918 · 11.06 Impact Factor
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    ABSTRACT: Unlabelled: Earlier studies have suggested neurocognitive impairment in patients with chronic hepatitis C virus (HCV) infection even before liver cirrhosis has developed. Since these deficits might be reversible after successful antiviral therapy, we analyzed the long-term course of neurocognitive parameters in HCV patients with and without successful virus elimination by an interferon-based antiviral treatment. In a multicenter study including 168 HCV patients receiving antiviral therapy (peginterferon alpha-2b and ribavirin) we performed a long-term follow-up of neurocognitive performance before and after treatment. Neurocognitive function was psychometrically assessed using the computer-aided TAP (Test Battery of Attentional Performance). When tested at least 12 months after termination of antiviral treatment, patients with sustained virologic response (SVR) had improved significantly as compared to their pretreatment performance in three of five TAP subtasks (vigilance, P < 0.001; shared attention: optical task, P < 0.001; working memory, P < 0.001). Patients who failed to eradicate the virus, however, showed no significant long-term changes in neurocognitive performance in all five subtasks assessed (0.194 < P < 0.804). In the posttreatment evaluation, neurocognitive function was significantly better in responders to the antiviral therapy as compared to nonresponders. Conclusion: Successful eradication of HCV leads to a significant improvement of relevant aspects of attentional and neurocognitive performance, indicating that the neurocognitive impairment caused by chronic HCV infection is potentially reversible. This therefore suggests an added therapeutic benefit of antiviral treatment in HCV infection. Improvement of neurocognitive function may be an additional treatment indication in patients with HCV. (HEPATOLOGY 2013;58:497-504).
    Hepatology 08/2013; 58(2). DOI:10.1002/hep.26229 · 11.06 Impact Factor
  • A Schäfer · M Scheurlen · M R Kraus ·
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    ABSTRACT: The efficacy of antiviral therapy in patients with chronic hepatitis C virus (HCV) infection has largely improved over the last years. Rates of long-term therapy success (sustained virological response, SVR) clearly exceed 50 % in the population of all antivirally treated HCV patients, even when including the less favourable virus genotypes 1 and 4. From recent research, it is well-known that adherence to current standard combination therapy (peginterferon alfa plus ribavirin) is crucial for the achievement of sustained response. Psychiatric adverse events, however, are subjectively very burdening and are among the most frequent reasons for premature discontinuation of antiviral therapy in HCV patients and therefore endanger therapy success. Therefore, effective side effect management regarding this branch of symptoms (e. g. depression, anger-hostility, anxiety) is to be considered crucial for the achievement of SVR. This review presents a current overview of the most relevant IFN-associated psychiatric side effects in antivirally treated patients with chronic hepatitis C infection. Moreover, various strategies for the management of these undesired conditions are reported: In particular, we address the issues of diagnostics and pretherapeutic screening for risk factors for the subsequent development of IFN-associated psychiatric symptoms. Moreover, we provide an overview of suitable instruments for the psychiatric monitoring of patients on antiviral therapy. We further discuss appropriate treatment strategies (e. g. prophylactic medication vs. medication only after the occurrence of symptoms) as well as indications for immediate therapy discontinuation due to serious psychiatric adverse events. In many cases, premature therapy discontinuation can be prevented by individual and adequate side effect management, provided that it is started in a timely manner. The continuing clinical relevance of psychiatric side effect management in this context is further backed up by the fact that also novel treatment strategies comprising protease or polymerase inhibitors will still include pegylated interferon alfa and ribavirin.
    Zeitschrift für Gastroenterologie 10/2012; 50(10):1108-13. DOI:10.1055/s-0031-1281682 · 1.05 Impact Factor
  • S Heckl · A Schäfer · A Dick · C Reiners · A Buck · M Scheurlen ·

    Zeitschrift für Gastroenterologie 09/2012; 50(09). DOI:10.1055/s-0032-1322374 · 1.05 Impact Factor
  • J Bauer · A Schäfer · MR Kraus · D Rogoll · C Keicher · R Melcher · M Scheurlen ·

    Zeitschrift für Gastroenterologie 09/2012; 50(09). DOI:10.1055/s-0032-1322377 · 1.05 Impact Factor
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    ABSTRACT: The objective of this study is to evaluate the vaccination status in rheumatoid arthritis (RA) patients during routine clinical practice, data from a German non-interventional cross-sectional study. In this prospective study, patients with rheumatoid arthritis were interviewed using a standardized questionnaire focusing on vaccination. Available vaccination documents were evaluated, and titers for common vaccination antigens (hepatitis B, rubella, mumps, measles, diphtheria, tetanus) were analyzed with special regard to the underlying treatment and age of patients. A total of 301 RA patients treated with conventional DMARDs alone (cohort I, n = 125), TNF-blocking agents (cohort II, n = 117), or B-cell depletion with rituximab (cohort III, n = 59) have been studied. Significantly more patients in the biologic cohorts II and III were aware of an increased risk of infections (I: 67.7%, II: 83.8%*, III: 89.9%*, P < 0.05). Pneumococcal vaccination rate was significantly higher (I: 20.2%, II 36.8%* and III: 39.0%*, P < 0.05) compared with cohort I. Differences were less evident for influenza. Significantly more patients ≥60 years of age have been vaccinated against Streptococcus pneumoniae and influenza. An obvious discrepancy existed between vaccination awareness and actual vaccination rates for all cohorts. No significant differences in vaccination titers could be seen between the three cohorts. Awareness of infectious complications was more present in patients treated with biologicals, and also, the rate of patients vaccinated against Streptococcus pneumoniae increased significantly depending on the underlying treatment. Nevertheless, there was a discrepancy between vaccination awareness and actual vaccination rates for all cohorts.
    Rheumatology International 02/2011; 32(6):1533-9. DOI:10.1007/s00296-011-1808-z · 1.52 Impact Factor
  • A Schäfer · M Scheurlen · T Leger · C Keicher · MR Kraus ·

    Zeitschrift für Gastroenterologie 10/2010; 48(10). DOI:10.1055/s-0030-1267667 · 1.05 Impact Factor
  • A Schäfer · S Kriener · K Paul · A Berger · M Scheurlen · MR Kraus · G Teuber ·

    Zeitschrift für Gastroenterologie 10/2010; 48(10). DOI:10.1055/s-0030-1267708 · 1.05 Impact Factor
  • A Schäfer · G Teuber · S Wollschläger · C Keicher · M Scheurlen · MR Kraus ·

    Zeitschrift für Gastroenterologie 10/2010; 48(10). DOI:10.1055/s-0030-1267666 · 1.05 Impact Factor

  • Gastroenterology 05/2010; 138(5). DOI:10.1016/S0016-5085(10)63867-X · 16.72 Impact Factor
  • A. Schäfer · S. Kriener · K. Paul · S. Zeuzem · M. Scheurlen · G. Teuber ·

    Journal of Hepatology 04/2010; 52. DOI:10.1016/S0168-8278(10)61075-6 · 11.34 Impact Factor
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    ABSTRACT: Interferon-associated depression is a frequent side effect of antiviral therapy for chronic hepatitis C. The aim of the present study was to investigate the correlation between platelet serotonin (5-hydroxytryptamine, 5-HT) concentrations and IFN-induced depression. The study represents a secondary analysis of a previously published trial on the efficacy of SSRI medication in HCV patients on IFN therapy. Ninety-three patients were longitudinally assessed for depression and platelet serotonin. Evaluation time points were: prior to IFN therapy, at weeks 4, 12, and 24 of IFN treatment, and 4 weeks after antiviral treatment. Depression was assessed using the Hospital Anxiety and Depression Scale (HADS). Platelet serotonin concentrations were measured by ELISA. Platelet serotonin concentrations were significantly decreased during interferon therapy (p=0.001) in 74 of the 93 patients (79.6%). Clinically relevant depression occurred in 33.3% of patients - however, IFN-induced depression was not significantly linked to either baseline 5-HT concentrations or kinetics. In the subgroup of patients with IFN-induced depression who received the selective serotonin reuptake inhibitor (SSRI) citalopram (20 mg daily, n=17), serotonin levels declined further during anti-depressant medication, becoming statistically significant within the first 2 weeks (p<0.001) of SSRI treatment. We demonstrate a significant impact of IFN and SSRI intake on platelet serotonin levels, suggesting a biochemical analogy between 5-HT metabolism in blood platelets and the CNS. Platelet 5-HT levels might serve as a surrogate marker for patient adherence to antiviral and anti-depressant medication. For the prediction of IFN-induced depression, however, platelet 5-HT measurements are not suitable.
    Journal of Hepatology 10/2009; 52(1):10-5. DOI:10.1016/j.jhep.2009.10.007 · 11.34 Impact Factor
  • A Schäfer · M Scheurlen · C Keicher · Kraus ·

    Zeitschrift für Gastroenterologie 10/2009; 47(10). DOI:10.1055/s-0029-1242235 · 1.05 Impact Factor
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    ABSTRACT: To examine among maintenance patients (methadone or buprenorphine) with and without hepatitis C virus (HCV) infection (i) the frequency of psychopathological symptoms at baseline and 1-year follow-up; (ii) the association between antiviral interferon (IFN) treatment and psychopathological symptoms; and (iii) to explore whether IFN therapy has an effect on 1-year outcome of maintenance treatment. Naturalistic prospective longitudinal cohort design. A total of 223 substitution centres in Germany. A nationally representative sample of 2414 maintenance patients, namely 800 without and 1614 with HCV infection, of whom 122 received IFN therapy. HCV infection (HCV+/HCV-), IFN (IFN+/IFN-) treatment status and clinical measures. Diagnostic status and severity (rated by clinician), psychopathology (BSI--Brief Symptom Inventory) and quality of life (EQ-5D--EuroQol Group questionnaire). HCV+ patients revealed indications for a moderately increased psychopathological burden and poorer quality of life at baseline and follow-up compared to HCV- patients. HCV+ patients showed a marked deterioration over time only in the BSI subscale somatization (P = 0.002), and the frequency of sleep disorders almost doubled over time (12.8% at baseline; 24.1% at follow-up; P < 0.01). IFN treatment, received by 10% of HCV+ patients, did not impair efficacy or tolerability of maintenance therapy and was associated overall with neither increased psychopathological burden nor reduced quality of life. Findings suggest no increased risk among HCV+ patients on maintenance therapy for depressive or other psychopathological syndromes. In our patient sample, IFN treatment was not associated with increased psychopathological burden, reduced quality of life or poorer tolerability and efficacy of maintenance treatment.
    Addiction 05/2009; 104(4):630-40. DOI:10.1111/j.1360-0443.2009.02509.x · 4.74 Impact Factor
  • M R Kraus · A Schäfer · M Scheurlen ·

    Gut 01/2009; 58(1):145-6. · 14.66 Impact Factor
  • M. R. Kraus · A. Schaefer · M. Scheurlen ·

    Gut 01/2009; 58(1):145-146. · 14.66 Impact Factor
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    ABSTRACT: Transient B cell depletion with the monoclonal anti-CD20 antibody rituximab has shown favourable clinical responses in patients with rheumatoid arthritis (RA). Recently a characteristic regeneration pattern of B cell subpopulations has been reported. However, little is known about the impact of B-cell depletion on peripheral T cells in particular regulatory T cells. 17 patients with RA having failed anti-TNF were treated with rituximab. Four colour staining was performed using CD19, CD3, CD4, CD8, CD16, CD56, CD25, HLA-DR, HLA-G and intracellular Foxp3 at five time points spanning up to 12 months after rituximab. In addition, quantification of the soluble form of the HLA class I molecule HLA-G by ELISA has been performed. Peripheral B cell depletion lasted 6 to 9 months. The absolute number of CD3+, CD4+ and CD8+ lymphocytes showed no significant changes up to 1 year after B-cell depletion compared to before therapy. Only the relative frequency for CD3 and CD4 showed a significant increase (p < 0.05). In particular, CD4+CD25++ and Foxp3 positive regulatory T cells remained constant. The percentage of HLA-G positive cells in the CD4+ or CD8+ population did not change significantly either. The amount of sHLA-G remained without significant changes. Absolute T cell counts showed no significant changes after rituximab compared to the time point before therapy.In particular, the frequency of regulatory T cells with a CD4+CD25++ phenotype as well as positive Foxp3 expression were numerically stable. Additionally, HLA-G positive regulatory T cells and soluble levels of HLA-G showed no significant changes.
    The Open Rheumatology Journal 12/2008; 2(1):81-8. DOI:10.2174/1874312900802010081
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    ABSTRACT: Health-related quality of life (HRQoL) is impaired in patients with chronic hepatitis C. We investigated HRQoL and fatigue in patients with chronic hepatitis C virus (HCV) infection in relation to the degree of fibrosis and inflammation, and controlled for the influence of relevant demographic and medical variables. We conducted a cross-sectional two-center study including 215 outpatients with chronic hepatitis C applying the Short-Form Health Survey (SF-36) and the Fatigue Impact Scale (FIS-D). The contribution to the variability of these psychometric scores was evaluated for the degree of fibrosis as well as viremia, gender, age, mode of transmission, genotype, and ALT. There was a strong negative association between the degree of liver fibrosis and the physical SF-36 summary score (p=0.016). This was independent of the covariate age, also significantly predicting physical HRQoL (p=0.001). The absolute FIS score was significantly increased in patients with advanced fibrosis (p=0.043). In females, mental SF-36 summary score (p=0.007) and fatigue (p=0.017) were significantly more impaired. Our study suggests a significant association of physical aspects of HRQoL and fatigue with the extent of fibrosis. Fibrosis stage should be considered for the identification and management of HCV patients at risk for reduced physical HRQoL.
    Journal of Hepatology 10/2008; 49(6):923-9. DOI:10.1016/j.jhep.2008.07.025 · 11.34 Impact Factor

Publication Stats

1k Citations
289.76 Total Impact Points


  • 2003-2013
    • University of Wuerzburg
      • Department of Internal Medicine II
      Würzburg, Bavaria, Germany
  • 2010
    • King Faisal Specialist Hospital and Research Centre
      Ar Riyāḑ, Ar Riyāḑ, Saudi Arabia
  • 2009
    • Technische Universität Dresden
      Dresden, Saxony, Germany