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Yekutiel N, Chodick G, Knop J, Cavlar T, Tsukinovsky S, Toren G, Kariv R. The epidemiology and burden of gastroparesis: Real-world data from a large healthcare provider in Israel. Neurogastroenterol Motil 2023; 35:e14522. [PMID: 36661118 DOI: 10.1111/nmo.14522] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 11/08/2022] [Accepted: 12/19/2022] [Indexed: 01/21/2023]
Abstract
BACKGROUND Gastroparesis is a gastrointestinal motility dysfunction characterized by delayed gastric emptying in the absence of gastric mechanical obstruction. Data on the epidemiology of gastroparesis are sparse even though the condition substantially impairs patients' quality of life. The aim of this study was to describe the epidemiology and estimate the short-term healthcare resource use burden of gastroparesis in a large population. METHODS This cross-sectional study utilized computerized data from Maccabi Healthcare Services, a 2.5-million member state-mandated health organization in Israel. Data were collected between 2003 and 2018 to assess the prevalence of gastroparesis. Definite gastroparesis was defined by gastroparesis diagnosis and gastric emptying test. Probable gastroparesis was defined by gastroparesis diagnosis only. To compare the healthcare resource utilization (HCRU), data were also collected on controls that were individually matched (1:2) for age, sex, and comorbidities. KEY RESULTS A total of 522 patients with gastroparesis were identified (21.1 per 100,000 WHO age-standardized), including 204 with definite gastroparesis (8.6 per 100,000 WHO). Male to female ratio was 1:2 and mean ± SD age of 54.7 ± 17.1 years. Diabetes accounted for 25.9% of gastroparesis cases and the rest were idiopathic. Gastroparesis patients were more likely to have cardiovascular diseases (10% vs. 6.9% for controls, p = 0.034) and lower prevalence of obesity (17% vs. 24.4%, p < 0.001). HCRU within the 2 years after index date were higher with more hospitalizations than controls (26.4% vs. 15.4%, p < 0.001), and more emergency room visits (31.6% vs. 24.1%, p = 0.002). CONCLUSIONS & INFERENCES Gastroparesis is uncommon or under-documented in community care settings. Gastroparesis in general is associated with cardiovascular morbidities, lower BMI, and elevated utilization of healthcare services.
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Affiliation(s)
- Naama Yekutiel
- Maccabitech Institute for Research and Innovation, Maccabi Healthcare Services, Tel Aviv, Israel
| | - Gabriel Chodick
- Maccabitech Institute for Research and Innovation, Maccabi Healthcare Services, Tel Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Jana Knop
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | - Taner Cavlar
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | | | - Ginat Toren
- Takeda Pharmaceuticals, Petach Tikva, Israel
| | - Revital Kariv
- Maccabitech Institute for Research and Innovation, Maccabi Healthcare Services, Tel Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Health Division, Maccabi Healthcare Services, Tel-Aviv, Israel
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Martinez-Saguer I, Knop J, Flemming A, Thomann M, Maurer M. Behandlung des hereditären Angioödems mit Lanadelumab in der deutschen Versorgungsrealität: Eine Analyse von Verordnungsdaten. J Dtsch Dermatol Ges 2022; 20:1127-1130. [PMID: 35971584 DOI: 10.1111/ddg.14785_g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Jana Knop
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin
| | | | | | - Marcus Maurer
- Charité - Universitätsmedizin Berlin, Berlin.,Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology, Berlin
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Martinez-Saguer I, Knop J, Flemming A, Thomann M, Maurer M. Real World treatment patterns of hereditary angioedema with lanadelumab in Germany: A prescription data analysis. J Dtsch Dermatol Ges 2022; 20:1127-1129. [PMID: 35913113 DOI: 10.1111/ddg.14785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Jana Knop
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | | | | | - Marcus Maurer
- Institute of Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology, Berlin
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Schubert S, Picker N, Cavlar T, Knop J, Kahraman A, Mohl W. Inflammatory Bowel Disease Patients' Treatment Preferences Using a Discrete Choice Experiment Technique: The InPuT Study. Adv Ther 2022; 39:2889-2905. [PMID: 35451740 PMCID: PMC9023727 DOI: 10.1007/s12325-022-02143-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/21/2022] [Indexed: 12/07/2022]
Abstract
Introduction The aim of this study was to investigate patients’ preferences regarding the evolving treatment landscape in Crohn’s disease (CD) and ulcerative colitis (UC) based on a discrete choice experiment. Methods Eligible patients (aged 18 years or older) had a confirmed diagnosis of CD or UC and were willing and able to participate in telephone interviews. The survey design is based on a prior literature review, a pilot study, and clinical expert discussions. Preferences related to clinical and practical features of advanced therapies, like tumor necrosis factor alpha inhibitors, anti-integrins, anti-interleukins, and Janus kinase inhibitors, were assessed. Patients were asked to choose between two different hypothetical treatment alternatives visualized in up to 11 choice scenarios. Based on these choices, the relative importance of treatment characteristics was derived from regression coefficients estimated by a conditional logit model. Results Of the 291 patients included, 219 (75%) were eligible for this analysis. Among the evaluated attributes in CD, 1-year remission rate was ranked highest, with 42.3% relevance for the overall decision. The second most important attribute was the frequency of serious adverse events (AE) (25.1%), followed by sustained remission over 2 years (17.8%). Lower importance was assigned to the administration mode (14.6%) and none to the frequency of non-serious AE (0.1%). In UC, preferences were driven by efficacy (25.3% for mucosal healing; 23.4% for corticosteroid-free remission) and the frequency of serious AE (18.3%), followed by the administration mode (18.1%). Also, non-serious AE were classified as relevant factors for decision-making (10.7%), while maintaining remission for at least 2 years showed no significant impact (4.4%). Conclusion For both indications, efficacy outcomes were rated most important, followed by the frequency of serious AE. Variations were mainly found in the evaluation of non-serious AE and sustained remission. Considering patient preferences may improve the effectiveness of available therapies for moderate to severe CD and UC. Supplementary Information The online version contains supplementary material available at 10.1007/s12325-022-02143-z.
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Teschner D, Knop J, Piehl C, Junker S, Witzke O. Cytomegalovirus infection and rehospitalization rates after allogeneic hematopoietic stem cell and solid organ transplantation: a retrospective cohort study using German claims data. Infection 2022; 50:1543-1555. [PMID: 35633464 PMCID: PMC9705421 DOI: 10.1007/s15010-022-01847-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 05/03/2022] [Indexed: 11/25/2022]
Abstract
PURPOSE This study aimed to describe the cytomegalovirus (CMV) infection rate, rehospitalizations, and comorbidities following allogeneic hematopoietic stem cell transplantation (allo-HSCT) and solid organ transplantation (SOT). METHODS Patients who received allo-HSCT or SOT in 01/07/2015-30/06/2018 were identified using anonymized German claims data. The transplantation-related hospital admission date was defined as the index date, and patients were followed for up to 12 months (or death, first event relevant). The frequency of CMV infections (confirmed outpatient/inpatient diagnoses, ICD-10-GM codes: B25.-/B27.1) and the rate, number, and duration of all-cause rehospitalizations in the follow-up period were evaluated. RESULTS A total of 226 allo-HSCT and 250 SOT patients were identified (mean age 52.8 years, 38.9% female). During the 12 months after transplantation, 29.2% of allo-HSCT patients and 16.8% of SOT patients received a CMV diagnosis. The majority of these diagnoses were given during the initial hospitalization or within the following 3 months. Across transplantation types, CMV patients had more hospital readmission days per patient-year (allo-HSCT 93.3 vs. 49.4, p = 0.001; SOT 42.0 vs. 20.7, p = 0.005), with a longer mean duration of readmissions (allo-HSCT 22.4 vs. 15.4 days, p < 0.001; SOT 11.6 vs. 7.5 days, p = 0.003). Comorbidity burden in transplantation patients was substantial, with several diagnoses being significantly more common among patients with CMV vs. non-CMV. One-year mortality did not differ significantly between patients with/without CMV. CONCLUSION Burden of transplant recipients with CMV in terms of rehospitalizations and comorbidities is substantial, highlighting the need for improved CMV prevention and treatment.
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Affiliation(s)
- Daniel Teschner
- Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany.,Department of Hematology, Medical Oncology, and Pneumology, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Jana Knop
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | | | - Sophia Junker
- Ingress-Health HWM GmbH, A Wholly Owned Subsidiary of Cytel Inc., Berlin, Germany.
| | - Oliver Witzke
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Hospital Essen, Essen, Germany.,University Duisburg-Essen, Duisburg, Germany
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Teich N, Schulze H, Knop J, Obermeier M, Stallmach A. Novel Approaches Identifying Relevant Patient-Reported Outcomes in Patients With Inflammatory Bowel Diseases-LISTEN 1. Crohns Colitis 360 2021; 3:otab050. [PMID: 36776662 PMCID: PMC9802460 DOI: 10.1093/crocol/otab050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Indexed: 12/11/2022] Open
Abstract
Background Several patient-reported outcomes (PROs) have been established and are widely used in the assessment of patients with inflammatory bowel disease (IBD). However, it has never been investigated which PRO items are experienced by and are considered most relevant for IBD patients. Methods A review of IBD-related disease scores by a steering committee led to the identification of relevant PRO questions and assignment to 16 different PRO categories (9 symptoms and 7 impacts) that characterize patient's disease burden. In a cross-sectional study, a digital patient survey was carried out to determine the self-reported experience by multiple response, the relevance of these PRO categories by pairwise comparison and the suitability of the respective questions and answer possibilities by yes-or-no-question. Results Sixty patients with Crohn's disease (CD) (56.7% women; mean age 40.6 years; mean disease duration 12.4 years) and 60 patients with ulcerative colitis (UC) (51.7% women; mean age 37.3 years; mean disease duration 9.0 years) participated in the patient survey. All predefined symptoms and impacts, with the exception of nausea, were experienced by at least 50% of patients. Stool urgency and pain were rated the 2 most important symptoms in CD patients with similar ratings for relevance. Stool urgency was also the most important symptom in patients with UC, followed by stool frequency. Differences in self-reported experience between CD and UC patients were seen for the symptoms of rectal bleeding, pain, and nausea. Most important impact of symptoms in both patient groups were general wellbeing followed by social activities, while sexual activity was the least relevant impact category. Conclusions Stool urgency was the most relevant and most self-reported symptom for both CD and UC. Relevance and self-reported experience of pain and rectal bleeding differed between the 2 diseases. Therefore, the future collection of PROs should take these disease specificities into consideration.
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Affiliation(s)
- Niels Teich
- Internistische Gemeinschaftspraxis für Verdauungs- und Stoffwechselkrankheiten, Leipzig, Germany,Medical Faculty of the Friedrich Schiller University Jena, Jena, Germany
| | | | - Jana Knop
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany,Address correspondence to: Jana Knop, PhD, Takeda Pharma Vertrieb GmbH & Co. KG, Jägerstraße 27, 10117 Berlin, Germany ()
| | | | - Andreas Stallmach
- Department of Internal Medicine IV, Jena University Hospital, Jena, Germany
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Terjung B, Schmelz R, Ehehalt R, Klaus J, Knop J, Schwind S, Wilke T, Stallmach A. Safety of vedolizumab in the treatment of pregnant women with inflammatory bowel disease: a targeted literature review. Therap Adv Gastroenterol 2020; 13:1756284820952592. [PMID: 33149762 PMCID: PMC7580131 DOI: 10.1177/1756284820952592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 07/31/2020] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Crohn's disease (CD) and ulcerative colitis (UC) commonly affect women in their childbearing years. Vedolizumab (VDZ) is approved for treatment of moderate-to-severe CD and UC, but there is a knowledge gap regarding its use during pregnancy. This targeted literature review describes available evidence on safety of VDZ in pregnant patients in order to offer physicians a detailed and balanced view on persistent data during their decision-making process for an individualized treatment concept. METHODS The search included literature from the MEDLINE database and abstracts of five gastroenterological conferences published until November 2019. Publications were included if pregnancy outcomes in women receiving VDZ or neonatal outcomes in newborns of women previously exposed to VDZ were reported. RESULTS Out of 196 initially identified records, 18 publications reporting results of five different studies were identified. In total, for 213 of 284 VDZ-exposed documented pregnancies the following pregnancy outcomes were reported: 167 live births (172 infants due to twin births), 1 stillbirth, 35 miscarriages, 10 elective terminations (1 due to detected Down syndrome). Furthermore, during pregnancy, the following complications were observed: seven cases of (pre) eclampsia, three cases of premature rupture of membranes and one case each of placenta previa, chorioamnionitis, pneumonia, first-trimester bleeding, cholestasis, sepsis, or neonatal intraventricular hemorrhage. Based on 172 infants, 30 preterm deliveries (17.4%), 9 cases of low birth weight (5.2%), 5 infections (2.9%), and 6 cases (3.8%) with congenital anomalies were reported. CONCLUSION There was no evidence for safety concerns regarding pregnancy outcomes associated with VDZ therapy. Due to the limited scope of included records, further research is needed to understand the safety profile regarding the use of VDZ during pregnancy.
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Affiliation(s)
- Birgit Terjung
- Department of Internal Medicine - Gastroenterology, GFO Kliniken Bonn, Nordrhein-Westfalen, Germany
| | - Renate Schmelz
- Medical Department 1, University Hospital Dresden, TU Dresden, Germany
| | - Robert Ehehalt
- Gastroenterology Outpatient Clinic Heidelberg, Heidelberg, Germany
| | - Jochen Klaus
- Innere Medizin I, Universitätsklinikum Ulm, Ulm, Germany
| | - Jana Knop
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | | | - Thomas Wilke
- Institut für Pharmakoökonomie und Arzneimittellogistik (IPAM) an der Hochschule Wismar, Wismar, Germany
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Bokemeyer B, Ghiani M, Fuchs A, Deiters B, Hardtstock F, Brandes A, Knop J, Orzechowski HD, Wilke T. Indicators of active disease and steroid dependency in patients with inflammatory bowel diseases not treated with biologics in a German real-world-setting. Int J Colorectal Dis 2020; 35:1587-1598. [PMID: 32424526 PMCID: PMC7340655 DOI: 10.1007/s00384-020-03588-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/04/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND AIMS While a minority of inflammatory bowel disease (IBD) patients receives biologics in Germany, little is known about therapeutic needs of patients receiving non-biologic therapies. This study aimed to identify indicators of active disease/steroid dependency in patients with moderate to severe Crohn's disease (CD) and ulcerative colitis (UC) treated with conventional therapies and to describe health care resource use (HCRU)/cost. METHODS CD/UC patients treated with immunosuppressants (IS) and/or systemic or locally acting oral corticosteroids (CS) were identified in German claims data (2013-2017) and followed for 12 months post-therapy start. Indicators of active disease/steroid dependency during follow-up period were (i) ≥ 2 prescriptions of CS (sensitivity ≥ 4) or (ii) ≥ 1 IBD-related surgery or (iii) > 7 days IBD-related hospitalization(s). RESULTS Of 9871 included IBD patients (5170 CD, 4701 UC), 25.7%/19.9% (CD/UC) received ≥ 2 prescriptions of CS (sensitivity, 17.4%/15.7%) (i), 3.2% experienced IBD-related surgeries (ii), and 2.5% > 7 days of hospitalizations (iii). Altogether, 44.4% had indicators of active disease/steroid dependency (sensitivity, 23.9%). Among patients with active disease/steroid dependency, 78.0% received CS monotherapy at baseline. Of these, 89.6% received a CS monotherapy in the follow-up period, too. Proportionally, fewer patients with CS monotherapy (57.4%) than IS therapy (91.0%) visited a specialist. HCRU/cost per patient year was significantly higher in patients with than without active disease/steroid dependency. CONCLUSIONS A substantial percentage of biologic-naïve IBD patients suffers from active disease/steroid dependency. The majority receives a monotherapy with systemic CS. Referral to gastroenterologists for treatment optimization is recommended, also because active disease/steroid dependency is associated with increased HCRU/cost.
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Affiliation(s)
- B. Bokemeyer
- Gastroenterology Practice Minden, Minden, Germany
| | | | | | | | | | - A. Brandes
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | - J. Knop
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | | | - T. Wilke
- Ingress-Health HWM GmbH, Alter Holzhafen 19, 23966 Wismar, Germany
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Helwig U, Mross M, Schubert S, Hartmann H, Brandes A, Stein D, Kempf C, Knop J, Campbell-Hill S, Ehehalt R. Real-world clinical effectiveness and safety of vedolizumab and anti-tumor necrosis factor alpha treatment in ulcerative colitis and Crohn's disease patients: a German retrospective chart review. BMC Gastroenterol 2020; 20:211. [PMID: 32640990 PMCID: PMC7341567 DOI: 10.1186/s12876-020-01332-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 06/03/2020] [Indexed: 02/07/2023] Open
Abstract
Background Real-world comparisons of biologic treatment outcomes for ulcerative colitis (UC) or Crohn’s disease (CD) patients are limited. We sought to evaluate the real-world effectiveness of vedolizumab (VDZ) and anti-tumor necrosis factor alpha (anti-TNFα) in UC and CD patients in Germany. Methods A retrospective chart review (15 sites) investigated UC and CD patients who were biologic-treatment naïve (biologic-naïve) or had received no more than one prior anti-TNFα before initiating treatment with VDZ or anti-TNFα between 15 July 2014 and 20 October 2015. Kaplan-Meier analyses assessed time to first chart-documented clinical remission (CR) and symptom resolution (UC: rectal bleeding [RB], stool frequency [SF]; CD: abdominal pain [AP], liquid stools [LS]) and outcome duration. Results A total of 133 UC (76 VDZ; 57 anti-TNFα) and 174 CD (69 VDZ; 105 anti-TNFα) patients were included. By Week 26, estimated cumulative rates of patients achieving CR or symptom resolution with VDZ vs anti-TNFα treatment were for UC: CR, 53.7% vs 31.7%; RB, 66.8% vs 55.8%; and SF, 59.8% vs 50.7%, respectively; and for CD: CR, 14.4% vs 32.8%; AP, 62.5% vs 56.0%; and LS, 29.9% vs 50.3%, respectively. Outcomes were sustained similarly between treatments, except RB (VDZ vs anti-TNFα: median 38.1 vs 15.1 weeks, P = 0.03). Treatment-related adverse events occurred in 5.3% vs 7.0% (UC) and 8.7% vs 19.0% (CD) of VDZ vs anti-TNFα patients, respectively. Conclusions Although there were differences in CR, symptom resolution, and safety profiles, real-world data support both VDZ and anti-TNFα as effective treatment options in UC and CD.
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Affiliation(s)
- Ulf Helwig
- Gastroenterology Private Practice, Neue Donnerschweer Str. 30, 26123, Oldenburg, Germany. .,University of Kiel, Kiel, Germany.
| | | | | | | | - Alina Brandes
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
| | | | - Christian Kempf
- Takeda Pharmaceuticals International AG, Zurich, Switzerland
| | - Jana Knop
- Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany
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Sørensen HJ, Holst C, Knop J, Mortensen EL, Tolstrup JS, Becker U. Alcohol and delirium tremens: effects of average number of drinks per day and beverage type. Acta Psychiatr Scand 2019; 139:518-525. [PMID: 30697683 DOI: 10.1111/acps.13006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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] [Accepted: 01/14/2019] [Indexed: 01/29/2023]
Abstract
OBJECTIVE Associations of amount of alcohol intake and beverage type with the risk of delirium tremens (DT) have not been studied. This longitudinal study investigated if the average number of drinks per day and beverage type predict DT. METHODS A cohort of 3 582 alcohol-dependent men and women aged 19-82 without previous DT were interviewed about alcohol intake and beverage type at baseline in 1994-2005 and followed through record linkage in Danish nationwide registers to identify incident DT. Data were analyzed by means of Cox regression models. RESULTS An average number of drinks per day of 20-30 or >30 was associated with hazard ratios (HRs) of 1.38 (95% CI 1.03-1.84) and 1.64 (95% CI 1.19-2.27) relative to the reference category (1-9 drinks). Independently of amount consumed and covariates (age, gender, civil status and work status), beverage type (spirits vs. mixed alcohol) was associated with a HR of 1.63 (95% CI 1.08-2.46). Male gender was robustly associated with increased risk (HR = 1.62 (95% CI 1.25-2.08). CONCLUSIONS In alcohol-dependent men and women, daily alcohol intake above a threshold of 20 beverages or 240 g alcohol and a preference for spirits increase the risk of developing DT.
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Affiliation(s)
- H J Sørensen
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark.,Mental Health Centre Copenhagen, The Capital Region, Copenhagen, Denmark
| | - C Holst
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - J Knop
- Department of Clinical Epidemiology, Frederiksberg & Bispebjerg Hospital, Copenhagen, Denmark
| | - E L Mortensen
- Department of Public Health and Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | - J S Tolstrup
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - U Becker
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark.,Gastrounit, Medical Division, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
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Abstract
The response of osteosarcomas to preoperative chemotherapy as measured by quantitative 99mTc-diphosphonate scintigraphy was compared with the amount of tumor cell destruction found histologically in the resected specimens. 3-phase bone scintigraphy, with determination of tumor/non-tumor (T/NT) ratios, allowed accurate prediction of tumor response in 28 of 30 tumors (accuracy = 93%) after completion and in 10 of 12 osteosarcomas (83%) at the half-way stage of preoperative chemotherapy, when only those tumors were evaluated which showed convergent changes of T/NT ratios in the perfusion and the mineral phase. At the half-way stage, however, evaluation of chemotherapy effects was complicated in 12 of 23 osteosarcomas by diverging T/NT ratios. In contrast, quantification and mapping of the tumor plasma volume and 99mTc-diphosphonate clearance on parametric images predicted correctly the histological tumor response to chemotherapy in 10 of 11 tumors (91%) after completion and in all 11 cases (100%) at the half-way stage.
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Knop J, Montz R, Stritzke P. Funktionsszintigraphie: Eine einheitliche Methode zur Quantifizierung von Stoffwechsel und Funktion in Organen. Nuklearmedizin 2018. [DOI: 10.1055/s-0038-1624305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
ZusammenfassungDie Funktionsszintigraphie ist eine quantitative Methode, mit welcher Stoffwechselgrößen eines Organs durch die Messung des zeitlichen Aktivitätsverlaufs eines Tracers im Gewebe bestimmt werden können. Ihre quantitative Aussage wird jedoch durch inhärente Fehlerquellen wie Absorption der Strahlung im Organ und Überlagerung von Vorder- und Hintergrundaktivität eingeschränkt. Bisherige Verfahren zur Berechnung von Funktionsparametern orientierten sich mehr an den gegebenen technischen Möglichkeiten als an gemeinsamen theoretischen Grundlagen. Sie fallen durch Vielfalt in ihren methodischen Ansätzen mit oft empirischem Charakter auf. Quantitative Ergebnisse verschiedener Institute und Kliniken sind deshalb selten vergleichbar. In der vorliegenden Arbeit wird ein methodischer Ansatz zur Vereinheitli-chung nuklearmedizinischer Auswertemethoden beschrieben. Grundlage ist die Einbeziehung der Pharmakokinetik eines Tracers im Blut. Dies führt zur Compartmentanalyse (deterministischen) oder zur stochastischen (nicht deterministischen) Beschreibung der kinetischen Vorgänge im Organ. Die stochastische Beschreibung setzt die Berechnung der Linear-Response-Funktion aus einem Fal-tungsintegral voraus. Mit Hilfe funktionalanalytischer Methoden wurde ein mathematisches Verfahren entwickelt, das es erlaubt, die Linear-Response-Funktion erstmals in jedem Bildpunkt und zu jedem Zeitpunkt zu berechnen. An einfach lesbaren Funktionsbildern wird gezeigt, wie relevante Parameter aus dem Funktionsverlauf der Linear-Response-Funktion berechnet werden können. Da diese Funktion modellunabhängig ist, ergibt sich die Möglichkeit, bestehende oder neue Modellvorstellungen der Tracer-kinetik im betreffenden Organ auch regional zuüberprüfen.
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Kargl A, Espinola-Klein C, Savvidis S, Knop J, Schmiedt W, Proebstle TM. Implantation eines bovinen Venenklappen- Xenografts in die Vena femoralis communis bei Patienten mit postthrombotischem Syndrom. Phlebologie 2017. [DOI: 10.1055/s-0037-1617347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
ZusammenfassungZiel: Für Patienten mit Ulcus cruris bei postthrombotischem Syndrom (PTS) fehlen allgemein zugängliche, kausale Therapieverfahren. Mit einer Machbarkeitsstudie sollte für Patienten mit schwerer Refluxkrankheit die Implantation eines bovinen Einsegel-Venenklappen- Xenografts in die Vena femoralis communis (VFC) geprüft werden. Methoden: Bei 5 Patienten wurde das Implantat nach ventraler Resektion von ca. 70% der VFC so eingenäht, dass im Valsalva-Versuch Suffizienz bestand. Ergebnisse: Der Verlauf war komplikatonslos bei 2 Patienten, duplexsonographisch zeigte sich bei 2 Patienten ein von der Nahtstelle ausgehender, symptomloser Appositionsthrombus, in einem Fall kam es zur vollständigen thrombotischen Obstruktion der VFC. Keine der implantierten Klappen war nach 18 Monaten vollständig kompetent. Dennoch reduzierte sich der mittlere Knöchelumfang von 234 ± 13,9 mm präoperativ auf 215 ± 20,4 mm 18 Monate postoperativ. Die mittlere Ulkusfläche ging von 8,1 ± 10,3 cm2 auf 1,8 ± 2,1 cm2, der mittlere Durchmesser der Vena poplitea von 6,9 ± 2,0 mm auf 5,5 ± 0,5 mm zurück. Die apparativ ausgelösten Refluxvolumina im Bereich der V. poplitea verringerten sich von 380 ± 325 ml/min auf 191 ± 158 ml/min. Schlussfolgerung: Die Implantation eines bovinen Einsegel- Venenklappen-Xenografts in die VFC ist technisch möglich. Für den Einsatz in der klinischen Routine sind weitere Entwicklungen nötig.
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Misaka S, Knop J, Singer K, Hoier E, Keiser M, Müller F, Glaeser H, König J, Fromm MF. The Nonmetabolized β-Blocker Nadolol Is a Substrate of OCT1, OCT2, MATE1, MATE2-K, and P-Glycoprotein, but Not of OATP1B1 and OATP1B3. Mol Pharm 2016; 13:512-9. [PMID: 26702643 DOI: 10.1021/acs.molpharmaceut.5b00733] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nadolol is a nonmetabolized β-adrenoceptor antagonist and is a substrate of OATP1A2, but not of OATP2B1. However, other drug transporters involved in translocation of nadolol have not been characterized in detail. We therefore investigated nadolol as a potential substrate of the hepatic uptake transporters OATP1B1, OATP1B3, and OCT1 and of the renal transporters OCT2, MATE1, and MATE2-K expressed in HEK cells. Moreover, the importance of P-glycoprotein (P-gp) for nadolol transport was studied using double transfected MDCK-OCT1-P-gp cells. Nadolol was not transported by OATP1B1 and OATP1B3. In contrast, a significantly higher nadolol accumulation (at 1 and 10 μM) was found in OCT1, OCT2, MATE1, and MATE2-K cells compared to control cells (P < 0.01). Km values for OCT2-, MATE1-, and MATE2-K-mediated nadolol uptake were 122, 531, and 372 μM, respectively. Cimetidine (100 μM, P < 0.01) and trimethoprim (100 μM, P < 0.001) significantly inhibited OCT1-, OCT2-, MATE1-, and MATE2-K-mediated nadolol transport. The P-gp inhibitor zosuquidar significantly reduced basal to apical nadolol transport in monolayers of MDCK-OCT1-P-gp cells. In summary, nadolol is a substrate of the cation transporters OCT1, OCT2, MATE1, MATE2-K, and of P-gp. These data will aid future in vivo studies on potential transporter-mediated drug-drug or drug-food interactions with involvement of nadolol.
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Affiliation(s)
- Shingen Misaka
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Germany.,Department of Pharmacology, School of Medicine, Fukushima Medical University , Fukushima, Japan
| | - Jana Knop
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Germany
| | - Katrin Singer
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Germany
| | - Eva Hoier
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Germany
| | - Markus Keiser
- Department of Clinical Pharmacology, Center of Drug Absorption and Transport (C_DAT), University Medicine of Greifswald , Greifswald, Germany
| | - Fabian Müller
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Germany
| | - Hartmut Glaeser
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Germany
| | - Jörg König
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Germany
| | - Martin F Fromm
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg , Erlangen, Germany
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Knop J, Hoier E, Ebner T, Fromm MF, Müller F. Renal tubular secretion of pramipexole. Eur J Pharm Sci 2015; 79:73-8. [DOI: 10.1016/j.ejps.2015.09.004] [Citation(s) in RCA: 9] [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] [Received: 04/27/2015] [Revised: 08/09/2015] [Accepted: 09/02/2015] [Indexed: 01/11/2023]
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Knop J, Misaka S, Singer K, Hoier E, Müller F, Glaeser H, König J, Fromm MF. Inhibitory Effects of Green Tea and (-)-Epigallocatechin Gallate on Transport by OATP1B1, OATP1B3, OCT1, OCT2, MATE1, MATE2-K and P-Glycoprotein. PLoS One 2015; 10:e0139370. [PMID: 26426900 PMCID: PMC4591125 DOI: 10.1371/journal.pone.0139370] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 09/12/2015] [Indexed: 11/18/2022] Open
Abstract
Green tea catechins inhibit the function of organic anion transporting polypeptides (OATPs) that mediate the uptake of a diverse group of drugs and endogenous compounds into cells. The present study was aimed at investigating the effect of green tea and its most abundant catechin epigallocatechin gallate (EGCG) on the transport activity of several drug transporters expressed in enterocytes, hepatocytes and renal proximal tubular cells such as OATPs, organic cation transporters (OCTs), multidrug and toxin extrusion proteins (MATEs), and P-glycoprotein (P-gp). Uptake of the typical substrates metformin for OCTs and MATEs and bromosulphophthalein (BSP) and atorvastatin for OATPs was measured in the absence and presence of a commercially available green tea and EGCG. Transcellular transport of digoxin, a typical substrate of P-gp, was measured over 4 hours in the absence and presence of green tea or EGCG in Caco-2 cell monolayers. OCT1-, OCT2-, MATE1- and MATE2-K-mediated metformin uptake was significantly reduced in the presence of green tea and EGCG (P < 0.05). BSP net uptake by OATP1B1 and OATP1B3 was inhibited by green tea [IC50 2.6% (v/v) and 0.39% (v/v), respectively]. Green tea also inhibited OATP1B1- and OATP1B3-mediated atorvastatin net uptake with IC50 values of 1.9% (v/v) and 1.0% (v/v), respectively. Basolateral to apical transport of digoxin was significantly decreased in the presence of green tea and EGCG. These findings indicate that green tea and EGCG inhibit multiple drug transporters in vitro. Further studies are necessary to investigate the effects of green tea on prototoypical substrates of these transporters in humans, in particular on substrates of hepatic uptake transporters (e.g. statins) as well as on P-glycoprotein substrates.
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Affiliation(s)
- Jana Knop
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Shingen Misaka
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Department of Pharmacology, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Katrin Singer
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Eva Hoier
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Fabian Müller
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Hartmut Glaeser
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Jörg König
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Martin F. Fromm
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- * E-mail:
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Knop J, App C, Huff T, Iavarone F, Castagnola M, Hannappel E. Identification of PDGF-BB binding to thymosin β4 by chemical cross-linking. Expert Opin Biol Ther 2015; 15 Suppl 1:S147-54. [PMID: 26096218 DOI: 10.1517/14712598.2015.1014793] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION The purpose of our work was to identify unknown interaction partners of thymosin β4 (Tβ4). It was suggested that Tβ4 could be an antifibrotic drug for treatment of liver fibrogenesis, because Tβ4 prevents the platelet-derived growth factor-BB (PDGF-BB)-induced activation of hepatic stellate cells (HSCs). Very little information is available how Tβ4 counteracts the PDGF-BB-induced activation of HSCs. We propose the hypothesis that Tβ4 could bind directly to PDGF-BB and thereby reduce the concentration of free PDGF-BB available for binding to the PDGF-β receptor. METHODS To prove our suggestion of a direct interaction between Tβ4 and PDGF-BB, we carried out chemical as well as photochemical cross-linking experiments between the two pure proteins in vitro. RESULTS We identified an interaction between Tβ4 and PDGF-BB by 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) cross-linking as well as through biotin label transfer using a bifunctional photoactivatable derivative of Tβ4. In an in vitro system, PDGF-BB was identified as the first extracellular partner interacting with Tβ4. This interaction could influence PDGF-BB binding to its receptor and abolish PDGF-BB-related effects. CONCLUSION Direct interaction of Tβ4 with extracellular factors should be considered as a potential mechanism to explain the pleiotropic effects of β-thymosins.
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Affiliation(s)
- Jana Knop
- Friedrich-Alexander-University Erlangen-Nuremberg, Institute of Biochemistry , Fahrstr. 17, 91054 Erlangen , Germany +49 9131 85 24187 ;
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Knop J. Diagnostic procedures in immunodeficiency. The arsenal, its limits and pitfalls. Curr Probl Dermatol 2015; 18:50-9. [PMID: 2663373 DOI: 10.1159/000416838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- J Knop
- Department of Dermatology, University of Mainz, FRG
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Abstract
Dipole moments of the ten isomeric phenanthrolines are presented and discussed shortly. They could be computed in a close approximation from the dipole moment vectors of the individual pyridine nuclei. Dipole moments calculated by means of the CNDO/2-method are in agreement with the experimental data.
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Affiliation(s)
- H.-H. Perkampus
- Institut für Physikalische Chemie der Universität Düsseldorf
| | - P. Müller
- Institut für Physikalische Chemie der Universität Düsseldorf
| | - J. Knop
- Institut für Physikalische Chemie der Universität Düsseldorf
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Knop J, Knop L. Quantenchemische und spektroskopische Untersuchungen an Porphyrinen. IV. Die Bacteriochlorine / Quantum Chemical and Spectroscopical Studies on Porphyrins IV. The Bacteriochlorins. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1972-1119] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The Pariser-Parr-Pople Π-electron method, with the inclusion of all single excited configurations, has been used to predict the electronic transitions of bacteriochlorins.
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Affiliation(s)
- J. Knop
- Institut für Physikalische Chemie, Universität Düsseldorf
| | - L. Knop
- Institut für Physikalische Chemie, Universität Düsseldorf
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App C, Knop J, Huff T, Sticht H, Hannappel E. Thymosin β4 and Tissue Transglutaminase. Molecular Characterization of Cyclic Thymosin β4. Protein J 2013; 32:484-92. [DOI: 10.1007/s10930-013-9507-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Knop J, App C, Horn AHC, Iavarone F, Castagnola M, Hannappel E. High-resolution HPLC-ESI-MS characterization of the contact sites of the actin-thymosin β(4) complex by chemical and enzymatic cross-linking. Biochemistry 2013; 52:5553-62. [PMID: 23924371 DOI: 10.1021/bi400664k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Thymosin β4 sequesters actin by formation of a 1:1 complex. This transient binding in the complex was stabilized by formation of covalent bonds using the cross-linking agents 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and a microbial transglutaminase. The localization of cross-linking sites was determined after separating the products using SDS-PAGE by tryptic in-gel digestion and high-resolution HPLC-ESI-MS. Three cross-linked fragments were identified after chemical cross-linking, indicating three contact sites. Because the cross-linked fragments were detected simultaneously with the corresponding non-cross-linked fragments, the three contact sites were not formed in parallel. K3 of thymosin β4 was cross-linked to E167 of actin, K18 or K19 of thymosin β4 to one of the first three amino acids of actin (DDE), and S43 of thymosin β4 to H40 of actin. The imidazole ring of histidine was proven to be an acyl acceptor for carbodiimide-mediated cross-linking. Molecular modeling proved an extended conformation of thymosin β4 along the subdomains 1 to 3 of actin. The enzymatic cross-linking using a microbial transglutaminase led to the formation of three cross-linking sites. Q41 of actin was cross-linked to K19 of thymosin β4, and K61 of actin to Q39 of thymosin β4. The third cross-linking site was identified between Q41 of actin and Q39 of thymosin β4, which are simultaneously cross-linked to K16, K18, or K19 of thymosin β4. When both cross-linking reactions are taken together, the complex formation of actin by thymosin β4 is more likely to be flexible than rigid and is localized along the subdomains 1 to 3 of actin.
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Affiliation(s)
- Jana Knop
- Institut für Biochemie, Emil-Fischer-Zentrum, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany.
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Abstract
Antibodies against thymosin β4 are available from various sources and have been used in immunohistochemistry, ELISA, and Western blot analyses. None of these antibodies have been fully characterized for specificity and influence of fixation techniques. This presents a difficulty because many tissues express more than one member of the β-thymosin family; in addition, highly homologous sequences are typical elements of β-thymosins. It is also important to scrutinize the influence of fixatives on the antibody-binding capability. Fixatives such as formaldehyde are well known as cross-linking reagents. Chemical modifications within the thymosin β4 molecule might change the putative epitope recognized by the antibody. These considerations suggest that investigations on thymosin β4 antibodies available to the scientific community are important and necessary before any experiment can be performed to exclude cross-reactivity with other β-thymosins that are coexistent in the examined tissue and to prove antibody binding after fixation steps.
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Affiliation(s)
- Jana Knop
- Institute of Biochemistry, Friedrich-Alexander-University, Erlangen, Germany.
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App C, Knop J, Mannherz HG, Hannappel E. Identification of interaction partners of β-thymosins: application of thymosin β4 labeled by transglutaminase. Ann N Y Acad Sci 2012; 1270:98-104. [PMID: 23050824 DOI: 10.1111/j.1749-6632.2012.06658.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this review, we identify potential interaction partners of the β-thymosin family. The proteins of this family are highly conserved peptides in mammals and yet only one intracellular (G-actin) and one cell-surface protein (β subunit of F(1) -F(0) ATP synthase) were identified as interaction partners of thymosin β4. Cross-linking experiments may be a possible approach to discover additional proteins that interact with the β-thymosin family. It has previously been shown that thymosin β4 can be labeled at its glutaminyl residues with various cadaverines using tissue transglutaminase. Here, we illuminate recent results and give an outlook on upcoming work in the field.
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Affiliation(s)
- Christine App
- Institute of Biochemistry, Friedrich Alexander University, Erlangen, Germany.
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Abstract
BACKGROUND It is often difficult to determine the correct size of endotracheal tubes (ETT) needed for intubating pediatric patients. Therefore, we evaluated the role of ultrasound in pediatric patients to compare the correct size of an uncuffed (ETT) with the minimal transverse diameter of the subglottic airway (MTDSA) measured by ultrasound and with tube size predicted by different age-related formulas. METHODS A total of 50 pediatric patients ≤ 5 years were enrolled. As a standard, we defined the adequate ETT size with no audible leakage below a ventilation pressure of 15 mbar and with an audible leakage above 25 mbar. The maximum allowed difference between the prediction method result and the ETT that fit was defined as 0.3 mm. Ultrasound was performed before the intubation procedure; the intubating anesthesiologists were blinded to the results of the ultrasound measurement. Agreement between the two age-based formulas most commonly used at our department and MTDSA with the correct ETT size (standard) was analyzed using a Bland-Altman plot. Correlation and regression analyses were performed and the numbers of correct intubation trials recorded. RESULTS The frequency of bias ≤ 0.3 mm between each method and the correct ETT in the first attempt was <50% and the mean number of reintubations 1.6 ± 1.3. In contrast to age-related formulas, however, the ultrasonographically determined MTDSA was not significantly different from the correct ETT. MTDSA was highly associated with the outer diameter of the ETT (r = 0.869, R(2) = 0.754). CONCLUSIONS Measuring MTDSA by ultrasound facilitates selection of the appropriate ETT in pediatric patients and may reduce the number of reintubations.
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Affiliation(s)
- Christoph Schramm
- Department of Anesthesiology, University of Heidelberg, Heidelberg, Germany
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Mathey D, Montz R, Hanrath P, Knop J, Kupper W, Schneider C, Bleifeld W. Kurzfristige regionale Myokardischämie und ihre Folgen bei Prinzmetal-Angina-pectoris. Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0028-1104809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Knop J, Penick EC, Nickel EJ, Mednick SA, Jensen P, Manzardo AM, Gabrielli WF. Paternal alcoholism predicts the occurrence but not the remission of alcoholic drinking: a 40-year follow-up. Acta Psychiatr Scand 2007; 116:386-93. [PMID: 17919158 DOI: 10.1111/j.1600-0447.2007.01015.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To test the effects of father's alcoholism on the development and remission from alcoholic drinking by age 40. METHOD Subjects were selected from a Danish birth cohort that included 223 sons of alcoholic fathers (high risk; HR) and 106 matched controls (low risk; LR). Clinical examinations were performed at age 40 (n = 202) by a psychiatrist using structured interviews and DSM-III-R diagnostic criteria. RESULTS HR subjects were significantly more likely than LR subjects to develop alcohol dependence (31% vs. 16%), but not alcohol abuse (17% vs. 15%). More subjects with alcohol abuse were in remission at age 40 than subjects with alcohol dependence. Risk did not predict remission from either alcohol abuse or alcohol dependence. CONCLUSION Familial influences may play a stronger role in the development of alcoholism than in the remission or recovery from alcoholism.
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Affiliation(s)
- J Knop
- The Institute of Preventive Medicine, University of Copenhagen, Copenhagen, Denmark.
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Bellinghausen I, König B, Böttcher I, Knop J, Saloga J. Inhibition of human allergic T-helper type 2 immune responses by induced regulatory T cells requires the combination of interleukin-10-treated dendritic cells and transforming growth factor-beta for their induction. Clin Exp Allergy 2007; 36:1546-55. [PMID: 17177678 DOI: 10.1111/j.1365-2222.2006.02601.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND In grass pollen-allergic individuals, T cell anergy can be induced by IL-10-treated dendritic cells (IL-10-DC) resulting in the suppression of T helper type 1 (Th1) as well as Th2 cells. This study was performed to analyse whether such IL-10-DC-treated T cells are able to act as regulatory T cells (Treg) suppressing the function of other T cells in the periphery. As transforming growth factor (TGF)-beta is also a potential inducer of Treg, we additionally analysed the inhibitory capacity of TGF-beta-treated T cells in this system. MATERIALS AND METHODS Freshly isolated CD4+ or CD4+ CD25- T cells from grass pollen-allergic donors were stimulated with autologous mature monocyte-derived allergen-pulsed DC in the presence or absence of T cells previously cultured with IL-10-DC- and/or TGF-beta. RESULTS Anergic T cells induced by allergen-pulsed IL-10-treated DC or allergen-pulsed DC and TGF-beta enhanced IL-10 production and strongly inhibited IFN-gamma production of freshly prepared peripheral CD4+ or CD4+ CD25- T cells while proliferation and Th2 cytokine production were only slightly reduced. The combination of allergen-pulsed IL-10-treated DC and TGF-beta had an additional effect leading to a significant suppression also of Th2 cytokine production and proliferation. Suppression was not antigen-specific and was mainly mediated by cell-to-cell contact and by the molecule-programmed death-1 and only partially by CTLA-4, TGF-beta and IL-10. CONCLUSION These data demonstrate that regulatory T cells that also suppress Th2 cytokine production are induced by two signals: TGF-beta and IL-10-DC. This is of importance for the regulation of allergic immune responses and might be exploited for future therapeutic strategies for allergic diseases.
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Affiliation(s)
- I Bellinghausen
- Department of Dermatology, University of Mainz, Mainz, Germany
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Knop J, Penick E, Nickel E, Murtaza S, Sullivan M, Jensen P. Do premorbid personality disorders predict adult alcoholism? Results from a Danish Longitudinal High Risk Study. Eur Psychiatry 2007. [DOI: 10.1016/j.eurpsy.2007.01.071] [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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Braun A, Bewersdorff M, Gutermuth J, Schober W, Mempel M, Behrendt H, Buters J, Jakob T, Traidl-Hoffmann C, Ring J, Müller M, Gilles S, Jacoby D, Schäkel K, Hochrein H, Ebling A, Rieber E, Meurer M, Dijkstra D, Werfel T, Gutzmer R, Bellinghausen I, Häringer B, Lafargue B, König B, Decker H, Knop J, Saloga J, Gehlhar K, Haußmann U, Peters M, Werner S, Bufe A, Stock P, Wunsch D, Lurz L, Röse L, Hamelmann E. Dendritische Zellen und T-Zellen. Allergo J 2007. [DOI: 10.1007/bf03370554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Peters M, Gorelik L, Kauth M, Bufe A, Holst O, Debarry J, Hanuszkiewicz A, Heine H, Patrascan CC, Garn H, Virna S, Bluemer N, Sel S, Renz H, Albrecht M, Staib C, Süzer Y, Reese G, Vieths S, Sutter G, Sudowe S, Gisch K, Bros M, Priesmeyer C, Knop J, Reske-Kunz A, Besche V, Glowacki C, Wiechmann N, Renzing A, Dang N, König B, Petersen A, Bellinghausen I, Böttcher I, Becker W, Saloga J, Belloni B, Lim A, Ziai M, Sbornik M, Ring J, Hein R, Ollert M, Mempel M, Pfaar O, Spielhaupter M, Klimek L, Fischer J, Berner D, Biedermann T. Experimentelle Therapieansätze. Allergo J 2007. [DOI: 10.1007/bf03370556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
Specific immunotherapy (SIT) is a well-established and clinically effective treatment for allergic rhinitis and bronchial asthma. The immunological mechanisms of the subcutaneously applied immunotherapy have been partially elucidated over the past several years but are not completely understood. This report summarizes the immunological and immunoregulatory changes during SIT of wasp venom allergic patients. The induction of IL-10-producing regulatory T cells is described.
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Affiliation(s)
- I Bellinghausen
- SFB 548 Allergie und Autoimmunität, Universitäts-Hautklinik Mainz, Mainz, Deutschland.
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Kornmann O, Staubach P, Korn S, Maurer M, Sebastian M, Knop J, Buhl R. Einfluss der Genese von Urtikaria-Subtypen auf die bronchiale Hyperreagibilität. Pneumologie 2005. [DOI: 10.1055/s-2005-864545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Knop J, Penick EC, L Mortensen E, Nickel EJ, Gabrielli WF, Jensen P, Mednick SA. Prediction of mortality at age 40 in Danish males at high and low risk for alcoholism. Acta Psychiatr Scand 2004; 110:476-82. [PMID: 15521834 DOI: 10.1111/j.1600-0447.2004.00393.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVE This prospective high-risk study examined the influence of father's alcoholism and other archival-generated measures on premature death. METHOD Sons of alcoholic fathers (n = 223) and sons of non-alcoholic fathers (n = 106) have been studied from birth to age 40. Archival predictors of premature death included father's alcoholism, childhood developmental data, and diagnostic information obtained from the Psychiatric Register and alcoholism clinics. RESULTS By age 40, 21 of the 329 subjects had died (6.4%), a rate that is more than two times greater than expected. Sons of alcoholic fathers were not more likely to die by age 40. Premature death was associated with physical immaturity at 1-year of age and psychiatric/alcoholism treatment. No significant interactions were found between risk and archival measures. CONCLUSION Genetic vulnerability did not independently predict death at age 40. Death was associated with developmental immaturities and treatment for a psychiatric and/or substance abuse problem.
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Affiliation(s)
- J Knop
- Institute of Preventive Medicine, University of Copenhagen, Copenhagen, Denmark.
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Galle K, Wiest K, Knop J, Enk A, Steinbrink K. Remission kutaner Satelliten- und Intransit-Filiae nach intraläsionaler IL-2-Behandlung bei malignem Melanom. Akt Dermatol 2004. [DOI: 10.1055/s-2004-832541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kahlert H, Weber B, Suck R, Cromwell O, Fiebig H, Kleinhans D, Blume C, Lindner B, Becker WM, Petersen A, Sander I, van Kampen V, Fleischer C, Meurer U, Brüning T, Merget R, Raulf-Heimsoth M, Boldt A, Ballmer-Weber B, Darcan Y, Galle J, Ahmed J, Seitzer U, Fölster-Holst R, Jensen JM, Frinken AL, Ho H, Stick C, von Wahl PG, Ott H, Wurpts G, Krieg R, Al Masaoudi T, Joussen S, Kiehl K, Neis M, Merk HF, Baron JM, Rihs HP, Kowal A, Degens PO, Landt O, Mariani V, Jakob T, Ring J, Behrendt H, Traidl-Hoffmann C, Wicklein D, Stöcker M, Klockenbring T, Huhn M, Barth S, Schürer NY, Sudowe S, Zindler E, Ludwig-Portugall I, Montermann E, Ross R, Reske-Kunz AB, Fang J, Ambach A, König W, Bonnekoh B, Gollnick H, König B, Bellinghausen I, Böttcher I, Knop J, Saloga J, Kurek M, Maleszka R, Staszyńska-Kurek M, Załuga E, Biedermann T, Günther C, Tangemann K, Schwärzler C, Lametschwandtner G, Rot A, Carballido JM, Pommer AJ, Böckelmann R, Malykh Y, Philipsen L, Schubert W, Schupp P, Gutgesell C, Fuchs T. Freie Vorträge. Allergo J 2004. [DOI: 10.1007/bf03371917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
OBJECTIVE The frequency of recanalization of the greater saphenous vein (GSV) after endovenous laser treatment (ELT) is unclear. This study was undertaken to establish the incidence of early recanalization after ELT and to study the histopathologic features of reperfused and excised GSV. METHODS One hundred nine GSV in 85 consecutive patients with clinical stage C(2-6) E(P,S) A(S,P,D) P(R) disease were treated with ELT. Twelve months of follow-up with duplex scanning at regular intervals was possible in 104 treated veins (95.4%) in 82 patients (96.5%). Recanalized vessels were removed surgically and examined at histopathology. RESULTS ELT-induced occlusion proved permanent at duplex scanning over 12 months of follow-up in 94 of 104 GSV (90.4%) in 73 patients. In 4 patients, 5 GSV (4.8%) were recanalized completely after 1 week, after 3 months (n = 3), or after 12 months. Another 5 GSV (4.8%) in 5 patients exhibited incomplete proximal recanalization over the 12 months of follow-up. Finally, 9 recanalized vessels (8.6%) required further treatment with high ligation and stripping. Histopathologic analysis of recanalized GSV revealed a multiluminal pattern, as commonly noted in reperfusion after spontaneous thromboplebotic occlusion of the GSV. During follow-up, secondary incompetency of untreated lateral accessory saphenous veins was observed in two legs (1.9%). CONCLUSION Early recanalization requiring retreatment is observed in less than 10% of GSV after ELT. The histopathologic pattern mimics recanalization after thrombophlebotic occlusion.
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Affiliation(s)
- T M Proebstle
- Department of Dermatology, University of Mainz, Mainz, Germany.
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Ross R, Sudowe S, Beisner J, Ross XL, Ludwig-Portugall I, Steitz J, Tüting T, Knop J, Reske-Kunz AB. Transcriptional targeting of dendritic cells for gene therapy using the promoter of the cytoskeletal protein fascin. Gene Ther 2003; 10:1035-40. [PMID: 12776161 DOI: 10.1038/sj.gt.3301968] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Strong cell-type-specific promoters are basic tools in gene therapy allowing for novel applications and focused strategies by transcriptionally targeting gene expression to selected cells. In immunotherapy, dendritic cells (DC) are of central importance, since they represent the principal inducers of immune responses. Here we describe isolation and use of the promoter of the murine actin-bundling protein fascin to target transcriptionally gene expression to cutaneous DC. Using the reporter gene enhanced green fluorescent protein (EGFP), we demonstrate that the fascin promoter mediates a strong antigen expression that is restricted to mature DC. DNA vaccination with antigen-encoding expression vectors under control of the fascin promoter using a gene gun resulted, consistently, in limited antigen expression by few directly transfected DC. Nevertheless, nearly as many antigen-specific CD8+ T cells directed against the encoded antigens EGFP and beta-galactosidase, respectively, were induced as with expression constructs under control of the ubiquitously expressed CMV promoter. This result impressively underlines the pivotal role of directly transfected DC in DNA vaccination. Immunization using the fascin promoter induced markedly lower levels of antigen-specific antibodies following single or repeated immunization. Thus, our DC-targeted DNA vaccination approach induces qualitatively distinct, predominantly cellular immune responses and provides new opportunities for immunotherapy.
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Affiliation(s)
- R Ross
- Department of Dermatology, Clinical Research Unit Allergology, Johannes Gutenberg University, 55131 Mainz, Germany
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Tuettenberg A, Tuettenberg J, Knop J, Enk A. [Septic thrombosis of the cavernous sinus due to folliculitis]. Hautarzt 2003; 54:351-3. [PMID: 12669208 DOI: 10.1007/s00105-002-0430-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Sinus thrombosis is an acute life-threatening disease. While cavernous sinus thrombosis secondary to facial infections is described in the literature, it is uncommon. The key clinical characteristics are a facial infection, headache, chemosis and edema of the eyelid. The main differential diagnostic consideration is meningoencephalitis. Early diagnosis by angiography, magnetic resonance imaging and examination of CSF is important as treatment should be initiated as soon as possible in order to decrease morbidity and mortality. The mainstays of therapy are heparinization and appropriate intravenous antibiotic therapy.
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Tuettenberg A, Jonuleit H, Tüting T, Brück J, Knop J, Enk AH. Priming of T cells with Ad-transduced DC followed by expansion with peptide-pulsed DC significantly enhances the induction of tumor-specific CD8+ T cells: implications for an efficient vaccination strategy. Gene Ther 2003; 10:243-50. [PMID: 12571632 DOI: 10.1038/sj.gt.3301880] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In recent years, vaccination strategies using antigen-presenting cells (APC) have been under investigation. Antigen delivery using genetic immunization through ex vivo transduction of dendritic cells (DC) is supposed to enhance the induction of antitumor responses in humans by activating a broad range of peptide-specific CD8+ T cells. In this study, we compared the potential of adenoviral (Ad)-transduced versus peptide-pulsed DC to induce melanoma-antigen (Ag)-specific T-cell responses in vitro. Whereas gp100-peptide-pulsed DC induced long-lasting specific CD8+ T-cell responses against single peptides, Ad-transduced DC induced broad and strong, specific immunity against various peptides of the gp100-Ag. Surprisingly, several restimulations led to decreasing gp100-specific and in parallel to increasing anti-adenoviral T-cell responses. Nevertheless, those anti-adenoviral T-cell responses provided an "adjuvant" effect by inducing an early release of high amounts of IL-2/IFN-gamma, therewith enhancing CTL induction in the initiation phase. Based on these data, we suggest a prime/boost vaccination strategy in melanoma patients--combining the use of Ad-DC and peptide-pulsed DC--to obtain efficient and long-term antitumor T-cell responses.
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Affiliation(s)
- A Tuettenberg
- Department of Dermatology, J. Gutenberg-University, Langenbeckstrasse 1, D-55101 Mainz, Germany
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Abstract
BACKGROUND Mast cells (MCs), critical effector cells in allergic inflammation and innate immunity to bacteria, are located in large numbers in tissues that interface the external environment, including the skin. However, little is known about the distribution and numbers of human skin MCs. OBJECTIVES To assess the influence of age, sex and skin region on size and spatial distribution of MC populations in normal human skin. METHODS Biopsies of healthy skin were obtained from 150 male and female individuals (age range 10-86 years). MCs were quantified and mapped planimetrically by histomorphometry in 15 anatomical sites (abdomen, thorax, lower and upper back, lower and upper arm, lower and upper leg, foot, hand, chin, nose, cheek, forehead, back of head). RESULTS No differences in skin MC numbers or distribution were found when comparing skin obtained from male or female and from young or old individuals. At all skin sites, regardless of age or sex, MC numbers were highest in the most superficial skin layers where up to 10-fold more MCs were found as compared with the subcutis, which consistently contained the lowest numbers of MCs. Interestingly, MC numbers were highest at peripheral skin sites (maximum: chin and nose) and lowest at central skin sites (minimum: abdomen). Thus, healthy human skin exhibits a proximal/distal and a central/peripheral MC gradient and 'skin MC numbers' may vary by a factor of more than 20, depending on the skin layer and skin site analysed. CONCLUSIONS These findings support the recently identified role of MCs in the elicitation of protective immune responses against infectious microorganisms. One possible explanation for these unexpected findings is that skin site/layer-specific factors (e.g. the density of nerves or vessels, exposure to ultraviolet irradiation, frequency of minimal trauma) are involved in the regulation of skin MC numbers and distribution.
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Affiliation(s)
- A Weber
- Department of Dermatology, University of Mainz, Langenbeckstr. 1, 55101 Mainz, Germany
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Saloga J, Knop J, Rihs HP, Dumont B, Rozynek P, Lundberg M, Cremer R, Brüning T, Raulf-Heimsoth M, Yeang HY, Sander I, Arif SAM, Fleischer C, Brüning T, Pöppelmann M, Grobe K, Becker WM, Petersen A, Wicklein D, Lindner B, Lepp U, Altmann F, Hipler UC, Frank U, Schliemann-Willers S, Kaatz M, Eisner P, Kasche A, Krämer U, Klaus S, Buters J, Traidl-Hoffmann C, Ring J, Behrendt H, Huss-Marp J, Brockow K, Darsow U, Risse U, Böttcher I, Sellinghausen I, Brand P, Klostermann B, Mariant V, Jakob T, Hochrein H, Müller MJ, Wagner H, Baron JM, Schiffer R, Bostonci Ö, Merk HF, Zwadlo-Klarwasser G, Schäkel K, Kannagi R, Kniep B, Goto Y, Mitsuoka C, Zwirner J, Soruri A, von Kietzell M, Rieber P, Lisewski M, Mommert S, Kapp A, Zwirner J, Werfet T, Gutzmer R, Langer K, Werfel T, Soewarto D, Köllisch G, Howaldt M, Sandholzer N, Kreramer E, Hrabé deAngelis M, Balling R, Ollert M, Pfeffer K, Wolf E, Flaswinkel H, Ngoumou G, Schäfer D, Mattes J, Moseler M, Kühr J, Kopp MV, Gutzmer R, Wittmann M, Janssen S, Köther B, Alter M, Stünkel T, Hausdirjg M, Ho TC, Buerke M, Lehr AH, Lux C, Schipp M, Galle RP, Finotto S, Bünder R, Mittermann I, Herz U, Valenta R, Renz H, Seidel-Guvenot W, Goez R, Maurer M, Metz M, Blessing M, Schramm C, Steinbrink K, Köllisch GV, Mempel M, Bauer S, Völcker V, Kasche A, Fesq H, Feussner I, Schober W, Buters J, Hueltner L, Lippert U, Artuc M, Babina M, Blaschke V, Zachmann K, Neumann C, Henz BM, Stassen M, Müller C, Richter C, Neudörfl C, Hüttner L, Bhakdi S, Walev I, Schmitt E, Mageri M, Maurer M, Hartmann K, Artuc M, Hermes B, Mekori YA, Henz BM, Breit S, Schöpf P, Dugas M, Schiffl H, Ruëff F, Przybilla B, Forssmann U, Härtung I, Bälder R, Escher SE, Spodsberg N, Dulkys Y, Walden M, Heitland A, Braun A, Forssmann WG, Elsner J, Raap U, Deneka N, Bruder M, Wedi B, Feser A, Plötz SG, Kreyling W, Schober W, Weichenmeier I, Papo D, Eberlein-König B, Berresheim HW, Grimm V, Winneke G, Kleine-Tebbe J, Breuer K, Vieths S, Worm M, Kunkel G, Wahn U, Lau S, Errlmann SM, Sauer I, Termeer C, Salman S, Averbeck M, Simon JC, Heine G, Frotscher B, Anton K, Mahnke K, Qian Y, Enk A, Enk AH, Beinghausen I, Darcan Y, Seitzer U, Ahmed J, Sudowe S, Ludwig-Portugall I, Ross R, Reske-Kunz AB, Maurer T, Lipford G, Wagner H, Rueff F, Bauer C, Gosepath J, Mewes T, Ziegler E, Ziegler EA, Flagge A, Hipler UC, Baumbach H, Zintl F, Eisner P, Mainz J, Huber S, Protschka M, Burg J, Galle PR, Lohse AW, Podlech J, Köhler H, Wegmann M, Heimann S, Fehrenbach A, Wagner U, Alfke H, Fehrenbach H, Beier J, Semmler D, Beeh KM, Kornmann O, Buhl R, Quarcoo D, Ahrens B, Meeuw A, Reese G, Vieths S, Hameimann E, Heratizadeh A, Wulf A, Constien A, Tetau D, Lingelbach A, Rakoski J, Fiedler EM, Zuberbier T, Weidermiller M, Winterkamp S, Schwab D, Nabe A, Nägel A, Maiss J, Mühldorfer SDN, Hahn EG, Raithel M, Weidenhiller M, Abel R, Baenkler HW, Mühldorfer S, Funkt G, Klinik I, Scheibenzuber M, Meyer-Pittroff R, Reese I, Oppel T, Hartmann K, Pfützner W, Biedermann T, Sing A, Dechene M, Staubach P, Hanau A, Magerl M, Eckhardt-Henn A, Onnen K, Kromminga A, Lüdtke R, Tschentscher I, Lange J, Berkenheide S, Kuehr J, Simon D, von Gunten S, Borelli S, Braathen LR, Simon HU, Fokken N, Wittmann M, Mrabet-Dahbi S, Klotz M, Heeg K, Soost S, Lee H, Klinger R, Becker D, Bruchhausen S, Jaeger C, Hartschuh W, Jappe U. 15. Mainzer Allergie-Workshop 2003. Allergo J 2003. [DOI: 10.1007/bf03361093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Steinbrink K, Knop J. [Significance of immunologic tolerance in dermatology]. Hautarzt 2003; 54:45-52. [PMID: 12567257 DOI: 10.1007/s00105-002-0390-4] [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: 09/29/2022]
Abstract
The immunological tolerance processes enable the organism to distinguish between self and non-self and are, therefore, critical for an efficient immune system. Exogenous or endogenous factors that disturb tolerance mechanisms induce uncontrolled activation of the immune system and the development of autoimmune diseases. In the field of dermatology, the most relevant autoimmune diseases are connective tissue diseases and autoimmune bullous skin disorders. In contrast, increased activity of tolerance shuts down parts of the normal immune response and thus facilitates the development of neoplasia and microbial infections in the skin and other organs. Immunological mechanisms for the induction of tolerance have been studied with the help of experimental models of tolerance to contact allergens. T- and B-cells, as well as antigen presenting cells, in particular dendritic cells, are involved in the immunological mechanisms of tolerance. The modification of autologous immune cells of patients with malignant tumors, allergic and autoimmune diseases might have potential for the development of new therapies.
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Affiliation(s)
- K Steinbrink
- Hautklinik der Johannes-Gutenberg-Universität Mainz.
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Proebstle TM, Schneiders V, Knop J. Gravimetrically controlled efficacy of subcorial curettage: a prospective study for treatment of axillary hyperhidrosis. Dermatol Surg 2002; 28:1022-6. [PMID: 12460297 DOI: 10.1046/j.1524-4725.2002.02104.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Botulinum toxin A (BTX-A) proved to be effective for the treatment of axillary hyperhidrosis by means of gravimetry. Quantitatively controlled studies for surgical treatment are lacking so far. OBJECTIVE To prospectively test the efficacy of subcorial axillary curettage by gravimetric evaluation of pre- and postsurgical sweat rates. METHODS Conservatively pretreated patients received subcorial curettage under tumescent local anesthesia using a sharp spoon. Sweat rates of each axilla were determined gravimetrically before and 4-8 weeks after surgery. Evaluation was performed with respect to baseline sweat rates greater than 50 mg/min (group A), greater than 25 and less than 50 mg/min (group B), and less than 25 mg/min (group C). Side effects and patients' ratings were also recorded. RESULTS Of 42 treated patients, 38 could be evaluated completely. In 29 axillae of group A (high sweat rates), an average reduction from the baseline of 85.6 mg/min to 21.6 mg/min could be achieved (P <.0001). Corresponding values for 22 axillae of group B (medium sweat rates) were 36.8 mg/min and 16.5 mg/min (P <.0001). In 25 axillae with low sweat rates (group C), a significant reduction in sweat rates could not be achieved. The results remained almost stable during a median follow-up of 11 months (range 4-24 months). Only minor side effects were observed and patient satisfaction was high in groups A and B. CONCLUSION Subcorial curettage is an effective treatment of axillary hyperhidrosis for patients with baseline sweat rates greater than 25 mg/min.
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Affiliation(s)
- T M Proebstle
- Department of Dermatology, University of Mainz, Mainz, Germany.
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Staubach-Renz P, Braeuninger W, Sattler G, Knop J. PSEUDALLESCHERIOSIS. Mycoses 2002. [DOI: 10.1111/j.1439-0507.2002.tb04725.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: 11/29/2022]
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Abstract
BACKGROUND Subfascial endoscopic perforator surgery (SEPS) has become an established procedure. OBJECTIVE To evaluate SEPS with tumescent local anesthesia (TLA) using an single-port device originally designed for that purpose. METHODS Patients selected for SEPS received subcutaneous infiltration of TLA into the medial aspect of the calf 20 minutes before surgery. Bipolar coagulation and dissection were used to treat incompetent perforators. RESULTS Fifty-one patients with 67 legs of CEAP stages C3-C6 underwent SEPS with TLA. In 40 patients or 53 legs (79.1%) TLA alone allowed successful completion of the SEPS procedure. Five patients with 7 legs (10.4%) required additional intravenous analgesics during surgery. In 4 patients or 4 legs (6.0%) with marked dermatoliposclerosis, pain control with TLA was so inadequate that SEPS had to be stopped. CONCLUSION SEPS with TLA is feasible in patients with CEAP stage C3-C6. However, patients with pronounced dermatoliposclerosis are likely to need more invasive analgesic measures.
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Affiliation(s)
- T M Proebstle
- Department of Dermatology, University of Mainz, Mainz, Germany, and Rosenpark-Klinik, Darmstadt, Germany
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Proebstle TM, Sandhofer M, Kargl A, Gül D, Rother W, Knop J, Lehr HA. Thermal damage of the inner vein wall during endovenous laser treatment: key role of energy absorption by intravascular blood. Dermatol Surg 2002; 28:596-600. [PMID: 12135514 DOI: 10.1046/j.1524-4725.2002.01309.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Despite the clinical efficacy of endovenous laser treatment (EVLT), its mode of action is incompletely understood. OBJECTIVE To evaluate the role of intravascular blood for the effective transfer of thermal damage to the vein wall through absorption of laser energy. METHODS Laser energy (15 J/pulse, 940 nm) was endovenously administered to explanted greater saphenous vein (GSV) segments filled with blood (n = 5) or normal saline (n = 5) in addition to GSVs under in vivo conditions immediately prior to stripping. Histopathology was performed on serial sections to examine specific patterns of damage. Furthermore, in vitro generation of steam bubbles by different diode lasers (810, 940, and 980 nm) was examined in saline, plasma, and hemolytic blood. RESULTS In saline-filled veins, EVLT-induced vessel wall injury was confined to the site of direct laser impact. In contrast, blood-filled veins exhibited thermal damage in more remote areas including the vein wall opposite to the laser impact. Steam bubbles were generated in hemolytic blood by all three lasers, while no bubbles could be produced in normal saline or plasma. CONCLUSION Intravascular blood plays a key role for homogeneously distributed thermal damage of the inner vein wall during EVLT.
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Affiliation(s)
- T M Proebstle
- Department of Dermatology and Institute of Pathology, University of Mainz, Germany.
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Fischer B, Knop J, Enk AH. [Experiences with therapy of stage IV metastatic malignant melanoma with "Legha Protocol" polychemoimmunotherapy]. Hautarzt 2002; 53:393-9. [PMID: 12132295 DOI: 10.1007/s00105-002-0379-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE Metastatic malignant melanoma (stage IV) is one of the most aggressive tumors. At the moment there is no safe therapy. Therefore the report of Legha et al., who achieved a rate of almost 10% of long-lasting complete remissions with a polychemoimmunotherapy using interleukin-2 and interferon-alpha in combination with cisplatin, vinblastine and dacarbazine, is a promising one. Because of these promising trends, we decided to treat our own patients with this therapy to examine the results, the side effects and the practicability on normal dermatological wards. PATIENTS/METHODS From 1997 to 2000 we treated 28 patients with metastatic malignant melanoma with the polychemoimmunotherapy according to Legha's protocol. RESULTS We achieved three complete (11.1%) and seven partial (25.9%) remissions (altogether 37%). Two of these patients are living relapse-free at the moment (7.4%). Three patients (11.1%) showed a stabilization of their disease, five patients (18.5%) had a mixed response and nine patients (33.3%) suffered progressive disease. CONCLUSIONS The rate of complete and partial remissions was lower than those reported by Legha et al., however the rate of long-lasting complete remissions was almost identical. The follow-up time is still ongoing, so we have to limit our results to this period. We want to emphasize the practicability of this kind of therapy on normal dermatological wards in spite of the relatively high toxicity.
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Affiliation(s)
- B Fischer
- Klinik und Poliklinik für Dermatologie, Venerologie und Allergologie, Universitätsklinikum Mainz
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