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Sievers C, Sämann PG, Dose T, Dimopoulou C, Spieler D, Roemmler J, Schopohl J, Mueller M, Schneider HJ, Czisch M, Pfister H, Stalla GK. Macroscopic brain architecture changes and white matter pathology in acromegaly: a clinicoradiological study. Pituitary 2009; 12:177-85. [PMID: 18836838 PMCID: PMC2712618 DOI: 10.1007/s11102-008-0143-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Although long-term exposure of the brain to increased GH/IGF-1 likely influences cerebral functions, no in vivo studies have been directed towards changes of the brain structure in acromegaly. Here, we used high resolution magnetic resonance images to compare volumes of gray matter (GM), white matter (WM) and cerebrospinal fluid (CSF) of forty-four patients with acromegaly to an age and gender matched, healthy control group (n = 44). In addition, white matter lesions (WMLs) were quantified and graded. Patients exhibited larger GM (+3.7% compared with controls, P = 0.018) and WM volumes (+5.1%, P = 0.035) at the expense of CSF. Differences of WML counts between patients and controls were subtle, however, showing more patients in the 21-40 lesions category (P = 0.044). In conclusion, this MRI study provides first evidence that acromegalic patients exhibit disturbances of the macroscopic brain tissue architecture. Furthermore, acromegalic patients may have an increased risk of neurovascular pathology, likely due to secondary metabolic and vascular comorbidities.
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Feltkamp M, de Koning M, Weissenborn S, Wieland U, Pfister H, ter Schegget J, Struijk L, Quint W, Abeni D, Sampogna F, Neale R, Green A, Bouwes Bavinck J. P.015 Prevalence and risk factors of betapapillomavirus infections in immunocompetent individuals without skin cancer. J Clin Virol 2009. [DOI: 10.1016/s1386-6532(08)70078-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Nocon A, Brückl T, Zimmermann P, Pfister H, Irving H, Rehm J, Lieb R, Wittchen HU. Different Pathways into Panic Disorder, Agoraphobia and Specific Phobia. Eur Psychiatry 2009. [DOI: 10.1016/s0924-9338(09)70770-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background:In light of the ongoing debate whether agoraphobia [AG] should be viewed as a severe phobic disorder similar to specific phobia [SPE] or as a complication of panic disorder [PD] we aim to study the vulnerability structure of PD, AG and SPE.Methods:3021 14-24 year-olds from the general population were followed-up over 10 years. DSM-IV syndromes were assessed via computerized M-CIDI interview and vulnerability factors via questionnaires. Associations were assessed with odds ratios from logistic regression. Latent class analysis (LCA) regressed on vulnerability factors was used to derive classes that underlie panic and phobic syndromes and to assess their associations with vulnerability factors.Results:1.Vulnerability patterns were largely similar between PD, AG and SPE.2.The LCA resulted in a best fitting model with 4 classes: a healthy class, a class with moderate frequency of phobias without PD, a class characterized by PD and AG and moderate frequency of SPE (PDAG class) and one class characterized by high frequency of AG and SPE situational type and lower frequency of PD (AGSIT class).3.All classes showed different associations with multiple vulnerability measures. Subjects in the PDAG class reported less SPE in parents (OR=0.2; 95% CI=0.0-0.6) and older onset-age of any psychopathology (OR=2.0; 95% CI=1.07-3.6) than the AGSIT class.Discussion:We found indications for separate latent classes underlying PD and phobias that were characterized by different vulnerability factors. We interprete the different classes as different vulnerability clusters and evidence of multiple pathways leading to panic and phobias.
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Klein M, Remi J, Pfister H, Straube A, Rupprecht T, Weckbach S, Pfefferkorn T. Mimicking of Cerebral Herniation Through γ-Hydroxybutyric Acid Therapy. Am J Crit Care 2008. [DOI: 10.4037/ajcc2008.17.6.593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Besides being a treatment option for narcolepsy, γ-hydroxybutyrate is used as an adjuvant during anesthesia in Europe. In addition, it is illegally used as a recreational drug. Fixed and dilated, asymmetric pupils developed in 2 patients during continuous therapy with intravenous γ-hydroxybutyrate, which was added to the long-term anesthetics fentanyl and midazolam. Cerebral herniation as an alternative cause for the pupillary changes was ruled out by using continuous intracranial pressure monitoring and computed tomography. In both patients, the pupillary abnormalities resolved after discontinuation of γ-hydroxybutyrate. Thus, fixed and dilated pupils that are asymmetric seem to be an important side effect of γ-hydroxybutyrate therapy that may mimic cerebral herniation in deeply anesthetized patients.
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Sievers C, Dimopoulou C, Pfister H, Roemmler J, Schopohl J, Schneider HJ, Zihl J, Stalla GK. Cognitive dysfunction in acromegaly: a clinical study in 55 patients. Exp Clin Endocrinol Diabetes 2008. [DOI: 10.1055/s-0028-1096356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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56
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Pfister H, Gissmann L, zur Hausen H. Partial characterization of the proteins of human papilloma viruses (HPV) 1-3. Virology 2008; 83:131-7. [PMID: 18625481 DOI: 10.1016/0042-6822(77)90216-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/1977] [Indexed: 11/30/2022]
Abstract
The protein compositions of full and empty particles of human papilloma viruses 1, 2, and 3 were compared by SDS-gel electrophoresis. The protein patterns revealed a considerable variation in the relative concentrations of three major proteins (VP2, 3, and 4) in individual preparations. In some cases, "heavy" and "light" full particles prepared from the same wart showed a similar variability in the concentrations of VP2, 3, and 4. The different protein patterns were interpreted as resulting from conversion of VP2 into VP3 and 4. The molecular relationship of these three proteins was confirmed by BrCN cleavage which led to corresponding oligopeptides. Electron micrographs of empty particles revealed that the only detectable protein components VP3 and 4 are present in typical capsomeres.
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Nocon A, Wittchen HU, Beesdo K, Brückl T, Hofler M, Pfister H, Zimmermann P, Lieb R. Differential familial liability of panic disorder and agoraphobia. Depress Anxiety 2008; 25:422-34. [PMID: 18023003 DOI: 10.1002/da.20425] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
To examine the familial liability of panic disorder (PD) and agoraphobia (AG) in a community sample, namely the effect of parental PD and AG on the offspring's risk to develop either or both conditions in adolescence or adulthood. A representative community sample of N=3,021 adolescents and young adults aged 14-24 years at baseline was followed up over a period of 10 years in up to four waves. Family information was assessed by either direct interviews with at least one parent or by using subjects' family history information at either wave (N=3,014). Diagnoses and selected symptoms were assessed in both, parents and subjects, by using a standardized diagnostic interview (DSM-IV M-CIDI) with its respective family history module. (1) Parental panic attacks (PA), PD, and AG were all shown to be associated with an increased risk of offspring to also develop PA, PD, and AG. (2) Associations of parental PD were present irrespective of parental AG, whereas parental AG without PD was not associated with an increased offspring risk. (3) Outcome risk was particularly elevated in offspring of parents with PD+AG. (4) Parental PD or AG was not associated with an earlier age of onset of any syndrome in the offspring. We confirmed and expanded previous results from clinical samples that comorbid PD and AG aggregate in families. AG without PD is not familial, but it might enhance the familial transmission of PD.
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Pfister H, Krubke J, Dietrich W, Iftner T, Fuchs PG. Classification of the papillomaviruses--mapping the genome. CIBA FOUNDATION SYMPOSIUM 2007; 120:3-22. [PMID: 3013524 DOI: 10.1002/9780470513309.ch2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Papillomaviruses form one genus of the Papovaviridae family. They share common antigenic determinants and their DNAs cross-hybridize under conditions of low stringency. The classification of papillomaviruses is at present based on the host range and the relatedness of the nucleic acids. Isolates are considered independent types if there is less than 50% cross-hybridization in the liquid phase according to a standard protocol. At least 31 human and six bovine papillomavirus types can be differentiated on this basis. The host range does not reflect the natural relationship between the viruses. Subgenera, which differ in biological properties, can be distinguished in outline. Data on overall sequence homology are insufficient for a meaningful classification because two types of virus may be closely related within one genome region and rather heterogeneous in other areas. Some new isolates appear as intermediates between previously well-separated types and complicate the system. A reasonable classification of such types of papillomavirus should be based on homologies between genes that are relevant for differences in the biology of the viruses. A functional mapping of the rather uniformly organized, colinear genomes of papillomaviruses has been started. Genetic studies with bovine papillomavirus type 1 have assigned functions in replication, transformation, gene expression and capsid synthesis to individual open reading frames.
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Sievers C, Dimopoulou C, Pfister H, Lieb R, Steffin B, Roemmler J, Schopohl J, Mueller M, Schneider HJ, Ising M, Wittchen HU, Stalla GK. A shifted psychopathological risk profile in acromegalic patients? Exp Clin Endocrinol Diabetes 2007. [DOI: 10.1055/s-2007-990445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Heck A, Lieb R, Ellgas A, Pfister H, Lucae S, Erhardt A, Himmerich H, Horstmann S, Kloiber S, Ripke S, Müller-Myhsok B, Bettecken T, Uhr M, Holsboer F, Ising M. Polymorphisms in the angiotensin-converting enzyme gene region predict coping styles in healthy adults and depressed patients. PHARMACOPSYCHIATRY 2007. [DOI: 10.1055/s-2007-991693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kohli MA, Salyakina D, Lucae S, Ising M, Bettecken T, Ripke S, Uhr M, Kloiber S, Horstmann S, Pütz B, Reppermund S, Heck A, Pfister H, Holsboer F, Müller-Myhsok B. Susceptibility gene hunting for recurrent unipolar depression using 400k genome-wide genotype data. PHARMACOPSYCHIATRY 2007. [DOI: 10.1055/s-2007-991708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Heck A, Lieb R, Ellgas A, Pfister H, Lucae S, Erhardt A, Himmerich H, Horstmann S, Kloiber S, Ripke S, Müller-Myhsok B, Bettecken T, Uhr M, Holsboer F, Ising M. Polymorphisms in the angiotensin-converting enzyme gene region predict coping styles in healthy adults and depressed patients. PHARMACOPSYCHIATRY 2007. [DOI: 10.1055/s-2007-991694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Sievers C, Dimopoulou C, Pfister H, Lieb R, Steffin B, Roemmler J, Schopohl J, Schneider HJ, Ising M, Wittchen HU, Saemann PG, Czisch M, Wendl A, Zihl J, Stalla GK. Acromegalic patients: more depressed, without panic? The 'endocrine psychosyndrome' of acromegaly revised. PHARMACOPSYCHIATRY 2007. [DOI: 10.1055/s-2007-991889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Erhardt A, Unschuld PG, Ripke S, Lucae S, Kohli M, Kloiber S, Puetz B, Heck A, Ellgas A, Pfister H, Ising M, Bettecken T, Müller-Myhsok B, Keck ME, Holsboer F. A genome-wide association study in patients with panic and anxiety disorders. PHARMACOPSYCHIATRY 2007. [DOI: 10.1055/s-2007-991797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Gross G, Ikenberg H, Petry KU, Pfister H, Schneede P, Schöfer H, Szeimies RM. [Condyloma acuminata and other HPV-associated diseases of the genitals, anus and urethra]. Hautarzt 2007; 58:179-86. [PMID: 17582847 DOI: 10.1007/s00105-006-1270-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
MESH Headings
- Anus Diseases/diagnosis
- Anus Diseases/therapy
- Anus Neoplasms/diagnosis
- Anus Neoplasms/therapy
- Carcinoma in Situ/diagnosis
- Carcinoma in Situ/therapy
- Cell Transformation, Neoplastic/pathology
- Condylomata Acuminata/diagnosis
- Condylomata Acuminata/therapy
- Diagnosis, Differential
- Female
- Genital Diseases, Female/diagnosis
- Genital Diseases, Female/therapy
- Genital Diseases, Male/diagnosis
- Genital Diseases, Male/therapy
- Genital Neoplasms, Female/diagnosis
- Genital Neoplasms, Female/therapy
- Genital Neoplasms, Male/diagnosis
- Genital Neoplasms, Male/therapy
- Germany
- Human papillomavirus 11
- Human papillomavirus 16
- Human papillomavirus 18
- Humans
- Male
- Papillomavirus Infections/diagnosis
- Papillomavirus Infections/therapy
- Recurrence
- Urethral Diseases/diagnosis
- Urethral Diseases/therapy
- Urethral Neoplasms/diagnosis
- Urethral Neoplasms/therapy
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Kreuter A, Brockmeyer NH, Altmeyer P, Pfister H, Wieland U. Rapid onset of multifocal human papillomavirus 72-associated oral intraepithelial neoplasia in a human immunodeficiency virus-infected patient. Br J Dermatol 2007; 157:826-8. [PMID: 17672878 DOI: 10.1111/j.1365-2133.2007.08097.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kreuter A, Wieland U, Gambichler T, Altmeyer P, Pfister H, Tenner-Racz K, Racz P, Potthoff A, Brockmeyer NH. p16ink4a expression decreases during imiquimod treatment of anal intraepithelial neoplasia in human immunodeficiency virus-infected men and correlates with the decline of lesional high-risk human papillomavirus DNA load. Br J Dermatol 2007; 157:523-30. [PMID: 17573882 DOI: 10.1111/j.1365-2133.2007.08004.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Human papillomavirus (HPV)-associated anogenital cancers and their precursor lesions occur in excess in human immunodeficiency virus (HIV)-infected patients despite the initiation of highly active antiretroviral therapy. In this context, a drastically increased relative risk for anal intraepithelial neoplasia (AIN) exists in HIV-infected men having sex with men (MSM). In a pilot study, imiquimod, a topical immune response modifier, has been reported to be beneficial in the treatment of AIN. OBJECTIVES To investigate the role of several biomarkers as potential adjuncts in the course of imiquimod treatment for AIN, and to determine whether these markers correlate with the course of high-risk HPV DNA load during imiquimod therapy. METHODS Immunohistochemical staining was performed for p16(ink4a), minichromosome maintenance protein (MCM), Ki67, proliferating cell nuclear antigen (PCNA) and p21(waf1) expression before and after 16 weeks of imiquimod treatment for AIN. High-risk HPV DNA load determinations were performed by real-time polymerase chain reaction with type-specific primers and probes for HPV types 16, 18, 31 and 33. RESULTS Histopathological and virological analyses were performed in 21 HIV-infected MSM with histologically confirmed AIN. Eighteen (86%) patients had a complete histological clearance of AIN after imiquimod therapy. As previously shown, lesional high-risk HPV DNA load significantly decreased during imiquimod therapy. Moreover, a significant decline of p16(ink4a), Ki67, MCM and PCNA expression after treatment was observed, while p21(waf1) expression changed nonsignificantly after imiquimod therapy. A significant correlation between the course of high-risk HPV DNA load and p16(ink4a) expression was observed during imiquimod treatment of AIN, whereas the decline of high-risk HPV DNA load did not significantly correlate with MCM, Ki67, PCNA or p21(waf1) expression. CONCLUSIONS The significant decrease in p16(ink4a) expression in correlation with the drop of lesional high-risk HPV load suggests that p16(ink4a) may be a useful adjunct for the evaluation of treatment response in HPV-associated malignancies and their precursor lesions.
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Oette M, Kaiser R, Däumer M, Fätkenheuer G, Rockstroh JK, Knechten H, Mitrenga D, Beerenwinkel N, Sagir A, Pfister H, Häussinger D. [Epidemiology of primary drug resistance in chronically HIV-infected patients in Nordrhein-Westfalen, Germany, 2001-2005]. Dtsch Med Wochenschr 2007; 132:977-82. [PMID: 17457780 DOI: 10.1055/s-2007-979365] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND AND OBJECTIVE Primary HIV drug resistance, characterized by mutant virus strains in untreated HIV-infected persons, is of significant epidemiological significance. Primary resistance is associated with reduced efficacy of antiretroviral therapy (ART). We determined the prevalence of primary resistance in Nordrhein-Westfalen, Germany. PATIENTS AND METHODS Genotypic resistance testing was performed in a prospective multicenter study in chronically infected previously untreated HIV-positive patients before administration of first-line ART. Mutations were classified according to the International AIDS Society USA guidelines and the geno2pheno interpretation tool. RESULTS Between January 2001 and December 2005, resistance testing was performed in 831 patients. 77.4% were males, the mean age was 39 years (SD: 10.5). The mean duration of diagnosis of HIV infection was 1.6 years (SD: 3.4). 32.4% of patients were at CDC stage C, mean CD4 cell count was 236 /microl (SD: 205), and mean viral load was 206,855 copies/ml (SD: 450,610). In total, resistance-associated mutations were detected in 75 patients (9.0%; 95%CI, 7.1-11.0). After inclusion of mutations E44D and V118I, resistance was identified in 99 patients (11.9%; 95%CI, 9.7-14.1). 5.4% had mutations indicating nucleoside reverse transcriptase inhibitor (NRTI) resistance (95%CI, 3.9-7.0), 3.0% had non-NRTI resistance (95%CI, 1.8-4.2), and 2.4% had protease inhibitor resistance (95%CI, 1.4-3.4), respectively. Two-class resistance was detected in 0.8% (95%CI, 0.2-1.5), three-class resistance in 0.5% (95%CI, 0.01-1.0). Mutations indicating revertant variants of resistant strains were found in 3.9% (95%CI, 2.5-5.2). Considering the variables age, gender, time since diagnosis, CDC stage, CD4 cell count, viral load, HIV subtype, ethnic origin, and HIV transmission group, no significant risk factor for the presence of primary resistance was demonstrated in univariate and mutlivariate analyses. CONCLUSION The prevalence of primary resistant virus strains was about 10% in chronically infected ART-naive HIV-patients in the largest federal state of Germany. The majority of these patients had NRTI-associated resistance. No risk factor for the presence of primary drug resistance was identified. Because of the high prevalence and the possible impact on efficacy of drug treatment, routine genotypic resistance testing should be performed in untreated HIV-positive patients before administration of first-line ART.
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Kreuter A, Brockmeyer NH, Pfister H, Altmeyer P, Wieland U. Increased human papillomavirus type 31 DNA load in a verrucous high-grade intraepithelial neoplasia of a human immunodeficiency virus-infected patient with extensive bowenoid papulosis. Br J Dermatol 2007; 156:596-8. [PMID: 17300265 DOI: 10.1111/j.1365-2133.2007.07690.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Malisch W, Hirth U, Fried A, Pfister H. Phosphenium Complexes of the Chromium and Iron Group: Novel Cycloaddition Reactions and the Chemistry of PH-Functional and Chiral Derivatives1. PHOSPHORUS SULFUR 2006. [DOI: 10.1080/10426509308045608] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Moorhead R, Johnson C, Munzner T, Pfister H, Rheingans P, Yoo T. Visualization research challenges: a report summary. Comput Sci Eng 2006. [DOI: 10.1109/mcse.2006.77] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Akgül B, Cürten M, Haigis H, Rogosz I, Pfister H. Interferon regulatory factor 5.2 acts as a transcription repressor of Epidermodysplasia verruciformis-associated human papillomaviruses. Arch Virol 2006; 151:2461-73. [PMID: 16773233 DOI: 10.1007/s00705-006-0806-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2006] [Accepted: 05/11/2006] [Indexed: 02/02/2023]
Abstract
Human papillomavirus type 8 (HPV8) poses a high risk for malignant conversion of skin lesions in patients with Epidermodysplasia verruciformis (Ev). Its oncogene promoter P(175) contains the conserved sequence motifs CCAAC, M29, and an A/T-rich region, which are common in many Ev-associated viruses. In human keratinocytes P(175) shows very weak activity. We used the M29 sequence as bait in a yeast-one-hybrid screen of a HaCaT cDNA library to identify interacting proteins regulating P(175). We report the identification of a cDNA encoding the interferon regulatory factor IRF5.2. In band shift assays the physical interaction of IRF5.2 and M29 was confirmed, and also its binding to the negative regulatory element (NRE) of HPV8 could be demonstrated. In transient reporter gene assays, overexpressed IRF5.2 acts as a transcriptional repressor of HPV8 and the Ev-associated HPV types 5, 14, and 25. These results indicate that the cellular transcription factor IRF5.2 is a general transcription repressor of Ev-associated HPV.
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Habig M, Smola H, Dole VS, Derynck R, Pfister H, Smola-Hess S. E7 proteins from high- and low-risk human papillomaviruses bind to TGF-β-regulated Smad proteins and inhibit their transcriptional activity. Arch Virol 2006; 151:1961-72. [PMID: 16710631 DOI: 10.1007/s00705-006-0768-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2005] [Accepted: 03/14/2006] [Indexed: 01/07/2023]
Abstract
Human papillomaviruses (HPV) infect keratinocytes of skin and mucosa. Persistent infection can lead to the formation of benign tumors. In cases of high-risk HPV, such as HPV16 or 18, these may further progress to cancer. In order to support viral replication in suprabasal keratinocytes, the HPV E7 protein employs various strategies to keep keratinocytes in cycle and counteracts anti-proliferative signals from outside. HPV16 E7 can directly interfere with transforming growth factor-beta (TGF-beta) signalling by binding to Smad proteins mediating growth arrest. It has been speculated that this property of HPV16 E7 contributes to HPV-associated carcinogenesis. Here, we show that E7 proteins from different low- and high-risk HPV types bind to Smad 1 to 4. The E7 protein from HPV1, a low-risk HPV causing plantar warts, efficiently inhibited Smad 3-induced transcription. Our data strongly indicate that the Smad-binding capacity of E7 proteins from different HPVs may preserve keratinocyte proliferation required for the productive viral life cycle rather than promoting carcinogenesis.
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Gerein V, Rastorguev E, Gerein J, Lodemann E, Pfister H, Draf W, Desloovere C. 2′,5′-Oligoadenylate synthetase activity analysis and human papilloma virus typing as prognostic factors in patients with recurrent respiratory papillomatosis. The Journal of Laryngology & Otology 2006; 118:750-6. [PMID: 15550179 DOI: 10.1258/0022215042450733] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Objective: Determination of early prognostic factors in patients with recurrent respiratory papillomatosis is extremely important, so the major goal of our prospective, multicentre study was to evaluate (1) the feasibility of various factors to determine prognosis of the clinical course,as well as (2) the response to interferon-alpha therapy in recurrent respiratory papillomatosis. Methods: Forty-two patients with recurrent respiratory papillomatosis were treated with interferon-alpha (3 MU/m2 three times per week; mean therapy duration was 2.7 ± 1.8 years)in 1983–1994 and followed-up until 2003. Human papilloma virus (HPV) type, recurrent respiratory papillomatosis severity and 2′,5′-oligoadenylate synthetase activity were determined by standard methods and analysed for correlation with the results of long-term clinical outcome.Results and conclusion: Patients with HPV type 11, a severity score >4, a high number of surgical procedures prior to interferon-alpha therapy and a high basal 2′,5′-oligoadenylate synthetase activity should be considered at high risk of an aggressive clinical course, often with spread to lower airway passages, malignant transformation and death. Human papilloma virus type, score for recurrent respiratory papillomatosis severity, number of surgical procedures and 2′,5′-oligoadenylate synthetase activity showed significant association with response to interferon-alpha therapy and the long-term clinical course, so these factors have value in predicting prognosis in recurrent respiratory papillomatosis.
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