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Satzger I, Marks L, Kerick M, Klages S, Berking C, Herbst R, Völker B, Schacht V, Timmermann B, Gutzmer R. Allele frequencies of BRAFV600 mutations in primary melanomas and matched metastases and their relevance for BRAF inhibitor therapy in metastatic melanoma. Oncotarget 2016; 6:37895-905. [PMID: 26498143 PMCID: PMC4741972 DOI: 10.18632/oncotarget.5634] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 10/06/2015] [Indexed: 01/03/2023] Open
Abstract
Background The detection of BRAFV600 mutations in patients with metastatic melanoma is important because of the availability of BRAF inhibitor therapy. However, the clinical relevance of the frequency of BRAFV600 mutant alleles is unclear. Patients and Methods Allele frequencies of BRAFV600 mutations were analyzed by ultra-deep next-generation sequencing in formalin-fixed, paraffin-embedded melanoma tissue (75 primary melanomas and 88 matched metastases). In a second study, pretreatment specimens from 76 patients who received BRAF inhibitors were retrospectively analyzed, and BRAFV600 allele frequencies were correlated with therapeutic results. Results Thirty-five patients had concordantly BRAF-positive and 36 (48%) patients had concordantly BRAF-negative primary melanomas and matched metastases, and four patients had discordant samples with low allele frequencies (3.4–5.2%). Twenty-six of 35 patients with concordant samples had BRAFV600E mutations, three of whom had additional mutations (V600K in two patients and V600R in one) and nine patients had exclusively non-V600E mutations (V600K in eight patients and V600E -c.1799_1800TG > AA- in one patient). The frequency of mutated BRAFV600 alleles was similar in the primary melanoma and matched metastasis in 27/35 patients, but differed by >3-fold in 8/35 of samples. BRAFV600E allele frequencies in pretreatment tumor specimens were not significantly correlated with treatment outcomes in 76 patients with metastatic melanoma who were treated with BRAF inhibitors. Conclusions BRAFV600 mutation status and allele frequency is consistent in the majority of primary melanomas and matched metastases. A small subgroup of patients has double mutations. BRAFV600 allele frequencies are not correlated with the response to BRAF inhibitors.
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Affiliation(s)
- Imke Satzger
- Department of Dermatology and Allergy, Skin Cancer Center Hannover, Hannover Medical School, Hannover, Germany
| | - Lena Marks
- Department of Dermatology and Allergy, Skin Cancer Center Hannover, Hannover Medical School, Hannover, Germany
| | - Martin Kerick
- Sequencing Core Facility, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - Sven Klages
- Sequencing Core Facility, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - Carola Berking
- Department of Dermatology, Ludwig-Maximilian University of Munich, Munich, Germany
| | - Rudolf Herbst
- Department of Dermatology and Allergology, HELIOS Skin Cancer Center, Erfurt, Germany
| | - Bernward Völker
- Institute of Pathology, Nordstadt Krankenhaus, Hannover, Germany
| | - Vivien Schacht
- Department of Dermatology and Allergy, Skin Cancer Center Hannover, Hannover Medical School, Hannover, Germany
| | - Bernd Timmermann
- Sequencing Core Facility, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - Ralf Gutzmer
- Department of Dermatology and Allergy, Skin Cancer Center Hannover, Hannover Medical School, Hannover, Germany
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Hohenwarter A, Völker B, Kapp MW, Li Y, Goto S, Raabe D, Pippan R. Ultra-strong and damage tolerant metallic bulk materials: A lesson from nanostructured pearlitic steel wires. Sci Rep 2016; 6:33228. [PMID: 27624220 PMCID: PMC5021936 DOI: 10.1038/srep33228] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 08/23/2016] [Indexed: 12/02/2022] Open
Abstract
Structural materials used for safety critical applications require high strength and simultaneously high resistance against crack growth, referred to as damage tolerance. However, the two properties typically exclude each other and research efforts towards ever stronger materials are hampered by drastic loss of fracture resistance. Therefore, future development of novel ultra-strong bulk materials requires a fundamental understanding of the toughness determining mechanisms. As model material we use today’s strongest metallic bulk material, namely, a nanostructured pearlitic steel wire, and measured the fracture toughness on micron-sized specimens in different crack growth directions and found an unexpected strong anisotropy in the fracture resistance. Along the wire axis the material reveals ultra-high strength combined with so far unprecedented damage tolerance. We attribute this excellent property combination to the anisotropy in the fracture toughness inducing a high propensity for micro-crack formation parallel to the wire axis. This effect causes a local crack tip stress relaxation and enables the high fracture toughness without being detrimental to the material’s strength.
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Affiliation(s)
- A Hohenwarter
- Department of Materials Physics, Montanuniversität Leoben, Jahnstrasse 12, 8700 Leoben, Austria
| | - B Völker
- Department of Materials Physics, Montanuniversität Leoben, Jahnstrasse 12, 8700 Leoben, Austria
| | - M W Kapp
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, 8700 Leoben, Austria
| | - Y Li
- Max-Planck Institut für Eisenforschung, Max-Planck-Strasse 1, 40237 Düsseldorf, Germany
| | - S Goto
- Max-Planck Institut für Eisenforschung, Max-Planck-Strasse 1, 40237 Düsseldorf, Germany.,Akita University, Tegata Gakuencho, Akita 010-8502, Japan
| | - D Raabe
- Max-Planck Institut für Eisenforschung, Max-Planck-Strasse 1, 40237 Düsseldorf, Germany
| | - R Pippan
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, 8700 Leoben, Austria
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Wolf-Abdolvahab S, Arens A, Abdelkhalek K, Völker B, Ott H. Rezidivierende, aseptische Entzündungen der Haut. Monatsschr Kinderheilkd 2016. [DOI: 10.1007/s00112-016-0070-6] [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: 11/28/2022]
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Kretschmer L, Bertsch HP, Zapf A, Mitteldorf C, Satzger I, Thoms KM, Völker B, Schön MP, Gutzmer R, Starz H. Nodal Basin Recurrence After Sentinel Lymph Node Biopsy for Melanoma: A Retrospective Multicenter Study in 2653 Patients. Medicine (Baltimore) 2015; 94:e1433. [PMID: 26356697 PMCID: PMC4616624 DOI: 10.1097/md.0000000000001433] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
UNLABELLED The objective of this study was to analyze different types of nodal basin recurrence after sentinel lymph node biopsy (SLNB) for melanoma. PATIENTS AND METHODS Kaplan-Meier estimates and the Cox proportional hazards model were used to study 2653 patients from 3 German melanoma centers retrospectively.The estimated 5-year negative predictive value of SLNB was 96.4%. The estimated false-negative (FN) rates after 1, 2, 3, 5, and 10 years were 2.5%, 4.6%, 6.4%, 8.7%, and 12.6%, respectively. Independent factors associated with false negativity were older age, fewer SLNs excised, and head or neck location of the primary tumor. Compared with SLN-positive patients, the FNs had a significantly lower survival. In SLN-positive patients undergoing completion lymphadenectomy (CLND), the 5-year nodal basin recurrence rate was 18.3%. The recurrence rates for axilla, groin, and neck were 17.2%, 15.5%, and 44.1%, respectively. Significant factors predicting local relapse after CLND were older age, head, or neck location of the primary tumor, ulceration, deeper penetration of the metastasis into the SLN, tumor-positive CLND, and >2 lymph node metastases. All kinds of nodal relapse were associated with a higher prevalence of in-transit metastases.The FN rate after SLNB steadily increases over the observation period and should, therefore, be estimated by the Kaplan-Meier method. False-negativity is associated with fewer SLNs excised. The beneficial effect of CLND on nodal basin disease control varies considerably across different risk groups. This should be kept in mind about SLN-positive patients when individual decisions on prophylactic CLND are taken.
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Affiliation(s)
- Lutz Kretschmer
- From the Department of Dermatology, Venereology and Allergology, Georg August University of Göttingen, Robert-Koch-Str. 40, D-37075 Göttingen (LK, HPB, KMT, MPS); Department of Medical Statistics, Georg August University of Göttingen, Humboldtallee 32 37073 Göttingen (AZ); Department of Dermatology and Allergy, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany (IS, BV, RG); Department of Dermatology, Venereology and Allergology, Klinikum Hildesheim GmbH, Senator-Braun-Allee 33, 31135 Hildesheim, Germany (CM); and Department of Dermatology and Allergology, Klinikum Augsburg, Germany, Sauerbruchstr. 6, D-86179 Augsburg (HS)
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Haenssle HA, Kraus SL, Brehmer F, Kretschmer L, Völker B, Asper H, Kapp A, Gutzmer R. Dynamic Changes in Nevi of a Patient With Melanoma Treated With Vemurafenib. ACTA ACUST UNITED AC 2012; 148:1183-5. [DOI: 10.1001/archdermatol.2012.2649] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Meier A, Satzger I, Völker B, Kapp A, Gutzmer R. Reply to assessment of capsular melanoma cell deposits in sentinel lymph nodes. Cancer 2011. [DOI: 10.1002/cncr.25789] [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: 11/08/2022]
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Heratizadeh A, Völker B, Kupsch E, Wichmann K, Kapp A, Werfel T. [Successful symptomatic treatment of epidermodysplasia verruciformis with imiquimod 5% cream]. Hautarzt 2011; 61:1052-5. [PMID: 20824263 DOI: 10.1007/s00105-010-1998-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A 19-year-old patient presented with epidermodysplasia verruciformis (EV). In this genodermatosis, pathogenetic factors such as infection by human papilloma viruses as well as sun exposure are considered responsible for the malignant transformation of EV lesions to skin cancer within decades. So far, several therapeutic strategies have been unsatisfactory. In our case HPV 5b was detected and the associated skin lesions were successfully treated with imiquimod 5% cream.
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Affiliation(s)
- A Heratizadeh
- Klinik für Dermatologie, Allergologie und Venerologie, Medizinische Hochschule Hannover, Ricklinger Str. 5, 30449, Hannover.
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Kretschmer L, Starz H, Thoms KM, Satzger I, Völker B, Jung K, Mitteldorf C, Bader C, Siedlecki K, Kapp A, Bertsch HP, Gutzmer R. Age as a key factor influencing metastasizing patterns and disease-specific survival after sentinel lymph node biopsy for cutaneous melanoma. Int J Cancer 2011; 129:1435-42. [PMID: 21064111 DOI: 10.1002/ijc.25747] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Accepted: 09/08/2010] [Indexed: 11/07/2022]
Abstract
In our study, we investigated the impact of the constitutional factor age on the clinical courses of melanoma patients with sentinel lymph node (SLN) biopsy. Descriptive statistics, Kaplan-Meier estimates, logistic regression analysis and the Cox proportional hazards model were used to study a population of 2,268 consecutive patients from three German melanoma centers. Younger age was significantly related to less advanced primary tumors. Nevertheless, patients younger than 40 years of age had a twofold risk of being SLN-positive (p < 0.000001). Of the young patients with primary melanomas with a thickness of 0.76 mm to 1.0 mm, 19.7% were SLN-positive. Using multivariate analysis, younger age, increasing Breslow thickness, ulceration and male sex were significantly related to a higher probability of SLN-metastasis. During follow-up, older patients displayed a significantly increased risk of in-transit recurrences (p = 0.000002) and lymph node recurrences (p = 0.0004). With respect to melanoma specific overall survival the patient's age was highly significant in the multivariate analysis. The unfavorable effect of being older was significant in the subgroups with positive and negative SLNs. Age remained also significant for the survival after the onset of distant metastases (p = 0.002). In conclusion, the patient's age is a strong and independent predictor of melanoma-specific survival in patients with localized melanomas, in patients with positive SLNs and after the onset of distant metastases. Younger patients have a better prognosis despite their higher probability of SLN metastasis. Older patients are less frequently SLN-positive but have a higher risk of loco-regional recurrence.
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Affiliation(s)
- Lutz Kretschmer
- Department of Dermatology, Venereology and Allergology, Georg August University of Goettingen, Göttingen, Germany.
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Satzger I, Meier A, Hoy L, Völker B, Kapp A, Hauschild A, Gutzmer R. Sentinel Node Dissection Delays Recurrence and Prolongs Melanoma-Related Survival: An Analysis of 673 Patients from a Single Center with Long-Term Follow-Up. Ann Surg Oncol 2010; 18:514-20. [DOI: 10.1245/s10434-010-1318-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Indexed: 11/18/2022]
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10
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Degen A, Alter M, Schenck F, Satzger I, Völker B, Kapp A, Gutzmer R. Das Hand-Fuß-Syndrom als Nebenwirkung der medikamentösen Tumortherapie - Klassifikation und Management. J Dtsch Dermatol Ges 2010. [DOI: 10.1111/j.1610-0387.2010.07449_supp.x] [Citation(s) in RCA: 5] [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: 11/30/2022]
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Degen A, Alter M, Schenck F, Satzger I, Völker B, Kapp A, Gutzmer R. The hand-foot-syndrome associated with medical tumor therapy - classification and management. J Dtsch Dermatol Ges 2010; 8:652-61. [PMID: 20482685 DOI: 10.1111/j.1610-0387.2010.07449.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The hand-foot-syndrome (HFS, palmoplantar erythrodysesthesia, chemotherapy-associated acral erythema) is characterized by painful predominantly palmo-plantar lesions. The association with different chemotherapeutic agents has been known for over 20 years. More recently, HFS has been reported in association with regimens using targeted agents, in particular the multikinase inhibitors (MKI) sorafenib and sunitinib. The HFS associated with MKI has a different distribution and clinical appearance than the traditional disorder. In this review, similarities and differences between chemotherapy- and MKI-associated HFS are discussed and current recommendations for their prophylaxis and management are summarized.
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Affiliation(s)
- Annette Degen
- Clinic and Polyclinic for Dermatology, and Allergy, Skin Cancer Center Hannover (HTZH), Hannover Medical School, Germany
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Meier A, Satzger I, Völker B, Kapp A, Gutzmer R. Comparison of classification systems in melanoma sentinel lymph nodes-An analysis of 697 patients from a single center. Cancer 2010; 116:3178-88. [DOI: 10.1002/cncr.25074] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Polarz S, Völker B, Jeremias F. Metathesiscatalysts in confining reaction fields—confinement effects vs. surface effects. Dalton Trans 2010:577-84. [DOI: 10.1039/b911795b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Satzger I, Küttler U, Völker B, Schenck F, Kapp A, Gutzmer R. Anal Mucosal Melanoma withKIT-Activating Mutation and Response to Imatinib Therapy – Case Report and Review of the Literature. Dermatology 2010; 220:77-81. [DOI: 10.1159/000265558] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Accepted: 10/21/2009] [Indexed: 11/19/2022] Open
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Satzger I, Völker B, Kofahl-Krause D, Ganser A, Kapp A, Gutzmer R. [Intravascular lymphoma: two case reports demonstrating the heterogeneity of the disease]. Hautarzt 2008; 60:131-6. [PMID: 18654750 DOI: 10.1007/s00105-008-1583-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Intravascular lymphoma (IVL) is a rare subtype of extranodal large-B-cell lymphoma, histologically characterized by accumulation of clonal lymphocytes in small vessels of different organs. Overall survival is usually poor. The clinical manifestations are highly variable, depending on the involved organs. Cutaneous and neurological involvement is frequent; the cutaneous symptoms are heterogeneous with erythema, erythematous papules and plaques, generalized telangiectases and lesions resembling panniculitis or Kaposi sarcoma. IVL may also be limited to the skin; this entity is included the current classifications. We present here two patients with two different variants of IVL. One showed only skin involvement with panniculitis-like induration and responded well to therapy with Rituximab-CHOP (Rituximab plus Cyclophosphamide, Doxorubicin, Vincristine, Prednisolone). The other patient had distinctive cutaneous and neurological symptoms which did not respond to therapy. By means of these two patients, we present the heterogeneity of IVL and discuss current aspects of diagnosis and treatment.
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Affiliation(s)
- I Satzger
- Klinik und Poliklinik für Dermatologie und Venerologie, Medizinische Hochschule Hannover, Hauttumorzentrum Hannover (HTZH), Ricklinger Strasse 5, Hannover, Germany.
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Satzger I, Völker B, Meier A, Kapp A, Gutzmer R. Criteria in Sentinel Lymph Nodes of Melanoma Patients that Predict Involvement of Nonsentinel Lymph Nodes. Ann Surg Oncol 2008; 15:1723-32. [DOI: 10.1245/s10434-008-9888-z] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2007] [Revised: 03/04/2008] [Accepted: 03/04/2008] [Indexed: 11/18/2022]
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Gutzmer R, Satzger I, Thoms KM, Völker B, Mitteldorf C, Kapp A, Bertsch HP, Kretschmer L. Der histologische Status des Sentinel-Lymphknotens ist der wichtigste Prognosefaktor bei Melanomen ≥4 mm Tumordicke. J Dtsch Dermatol Ges 2008. [DOI: 10.1111/j.1610-0387.2007.06569_supp.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: 11/28/2022]
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Gutzmer R, Satzger I, Thoms KM, Völker B, Mitteldorf C, Kapp A, Bertsch HP, Kretschmer L. Sentinel lymph node status is the most important prognostic factor for thick (≥ 4 mm) melanomas. J Dtsch Dermatol Ges 2008; 6:198-203. [DOI: 10.1111/j.1610-0387.2007.06569.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Tavassol F, Starke OF, Völker B, Kokemüller H, Eckardt A. Heat-shock protein expression and topical treatment with tacrolimus in oral lichen planus: an immunohistochemical study. Int J Oral Maxillofac Surg 2008; 37:66-9. [PMID: 17822876 DOI: 10.1016/j.ijom.2007.06.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2006] [Revised: 05/30/2007] [Accepted: 06/15/2007] [Indexed: 10/22/2022]
Abstract
Oral lichen planus (OLP) is a chronic inflammatory mucosal disease of unknown etiology. Usually asymptomatic, the disorder is occasionally complicated by extensive painful erosions. Topical corticosteroids are the mainstay of treatment, but a new topical therapy with tacrolimus has been described previously. The aim of the current study was to examine the expression of heat-shock protein 70 (HSP70) in biopsy specimens from 11 OLP lesions before and after topical treatment with tacrolimus. Immunostaining was performed with anti-HSP70 antibody as the primary layer. Clinically, there was a rapid improvement with topical tacrolimus treatment in 10 out of the 11 patients. The moderate increase in HSP70 expression after treatment with tacrolimus was not significant. It was concluded that topical tacrolimus has no effect on the expression of HSP70 in OLP.
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Affiliation(s)
- F Tavassol
- Department of Oral and Maxillofacial Surgery, Hanover Medical School, Carl-Neuberg Strasse 1, 30625 Hannover, Germany.
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Satzger I, Völker B, Meier A, Schenck F, Kapp A, Gutzmer R. Prognostic significance of isolated HMB45 or Melan A positive cells in Melanoma sentinel lymph nodes. Am J Surg Pathol 2007; 31:1175-80. [PMID: 17667539 DOI: 10.1097/pas.0b013e3180341ebc] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [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: 11/26/2022]
Abstract
The detection of micrometastases (defined as groups of malignant cells) in the sentinel lymph node (SLN) is an important prognostic tool in melanoma. The use of immunohistochemistry with melanocytic markers such as HMB45 and Melan A increases the detection rate of micrometastases but there are also cases with isolated immunohistochemically positive cells (IPC). To determine the prognostic significance of isolated HMB45 and/or Melan A positive cells in melanoma SLN, we compared the clinical course of 47 patients with IPC to 308 patients with negative SLN and to 122 patients with micrometastases. The mean follow-up was 38.1 months. By Kaplan-Meier analyses, relapse free survival and overall survival of patients with IPC were similar to SLN negative patients, whereas patients with micrometastases had a significantly worse relapse free survival and overall survival. In the 47 patients with IPC, 6 relapses (12.8%) and 3 melanoma-related death (6.4%) occurred, in the SLN negative patients 36 relapses (11.7%) and 17 melanoma-related deaths (5.5%), in the patients with micrometastases 46 relapses (37.7%) and 29 melanoma-related deaths (23.8%). Prognosis of patients with IPC in SLN did not correlate with type of positive staining (HMB45, Melan A, or both), capsular involvement, number of cells, presence of cytologic atypias of IPC, or tumor penetrative depth. In conclusion, with short-term follow-up IPC in melanoma SLN are without prognostic significance.
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Affiliation(s)
- Imke Satzger
- Department of Dermatology, Skin Cancer Center Hannover, Hannover Medical School, Hannover, Germany.
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Satzger I, Völker B, Al Ghazal M, Meier A, Kapp A, Gutzmer R. Prognostic significance of histopathological parameters in sentinel nodes of melanoma patients. Histopathology 2007; 50:764-72. [PMID: 17493240 DOI: 10.1111/j.1365-2559.2007.02681.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [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: 11/27/2022]
Abstract
AIMS The presence of micrometastases in the sentinel lymph node (SLN) is an important prognostic parameter for melanoma patients. The aim was to determine the prognostic relevance of histopathological characteristics of micrometastases in the SLN, which has not been adequately addressed thus far. METHODS AND RESULTS In 169 melanoma patients with positive SLN, histopathological features of the SLN were correlated with overall survival (OS) and relapse-free survival (RFS). Tumour burden, expansion of melanoma cells in the periphery (infiltration of capsule) and towards the centre of the SLN [tumour penetrative depth (TPN)] were of prognostic significance for OS and RFS on univariate analysis. Multivariate analysis revealed three independent significant parameters which predict a poor prognosis: presence of infiltration of the SLN capsule, TPN > or = 2 mm and size of the largest tumour deposit > or = 30 cells. CONCLUSIONS Histopathological analysis of SLN allows the identification of patients with a poor prognosis depending on the location of melanoma cells and tumour burden.
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Affiliation(s)
- I Satzger
- Department of Dermatology and Allergology, Skin Cancer Centre Hannover, Hannover Medical School, Ricklinger Strasse 5, D-30449 Hannover, Germany
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Abstract
Tumoral or nodular melanosis is characterized by a clinical lesion suspicious for malignant melanoma, the histopathological correlate is a nodular accumulation of melanophages in the dermis. We present a patient with nodular melanosis involving also the sentinel lymph nodes and discuss possible differential diagnoses as well as prognostic and therapeutic implications.
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Affiliation(s)
- Imke Satzger
- Department of Dermatology and Allergology, Hannover Medical University, Hannover, Germany.
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Niebuhr M, Völker B, Kapp A, Wedi B. Recurrent neutrophilic panniculitis secondary to bacterial cystitis. Eur J Dermatol 2007; 17:89-91. [PMID: 17324837 DOI: 10.1684/ejd.2007.0195] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/05/2006] [Indexed: 11/17/2022]
Abstract
Neutrophilic panniculitis (NP) is a widely unknown inflammatory disorder of the subcutaneous fat. The diagnosis and proper classification of panniculitis relies on histologic features, mainly the location of the subcutaneous inflammation (septal, lobular, mixed or vascular). In contrast to erythema nodosum, where the inflammation predominates in the fat septa, NP is localized in the fat lobules. However, little is known about this rare condition. We report a 54-year-old woman with a history of several episodes with subcutaneous nodules occurring on the lower legs secondary to bacterial cystitis (successfully treated with antibiotics prior to admission to our Department), that responded immediately to treatment with oral corticosteroids. An infective aetiology for NP has not been described so far, although this can be found in other neutrophilic dermatoses. The originality of our case is the recurrence of the disease on several occasions in association with bacterial cystitis. This case confirms that infections can be a cause of NP.
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Affiliation(s)
- Margarete Niebuhr
- Department of Dermatology and Allergology, Hannover Medical University, Ricklinger Str. 5, D-30449 Hannover, Germany.
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24
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Abstract
A 65-year-old patient presented with grey-brownish maculae localized on the face. He had been treated with oral terbinafine due to onychomycosis, and the first spots manifested after 4 weeks of therapy. Other drugs were not taken by the patient, who was otherwise in a healthy condition. Histology showed melanin localized within macrophages in the upper and lower dermis. Cutaneous side effects are well described in patients treated with terbinafine and usually present as urticaria or eczema. Severe reactions may occur in rare cases. Hyperpigmentation has not yet been described as a consequence of oral terbinafine. Grey hyperpigmentation as it occurred in our patient has been described as a side effect of therapy with minocycline, amiodarone, tricyclic antidepressants, or heavy metals. This case report shows that drug-induced hyperpigmentation should also be considered if the patient takes drugs not known for this kind of side effect.
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Affiliation(s)
- K Breuer
- Klinik und Poliklinik für Dermatologie und Venerologie, Medizinische Hochschule Hannover.
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25
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Abstract
BACKGROUND Noninfectious granulomatous skin diseases are inflammatory disorders of unknown aetiology which are often recalcitrant to common anti-inflammatory treatment regimens. Recently, in several case reports, fumaric acid esters (FAE) have proved beneficial in granulomatous skin diseases, but studies on a larger collection of consecutive patients have not yet been performed. OBJECTIVES To investigate the therapeutic efficacy of FAE for the treatment of granulomatous skin diseases. PATIENTS AND METHODS The therapeutic efficacy and side-effects of FAE were analysed retrospectively in 32 patients with disseminated granuloma annulare (n = 13), annular elastolytic giant cell granuloma (n = 3), sarcoidosis (n = 11), necrobiosis lipoidica (n = 4), or granulomatous cheilitis (n = 1). RESULTS Three patients discontinued treatment within 4 weeks because of side-effects. Of the remaining 29 patients, 18 patients responded to treatment with FAE. Marked improvement or complete clearance was seen in seven patients. We observed a slight to moderate improvement in 11 patients, and 11 patients did not respond. In patients showing a complete remission, the maximum effect was observed after 8.5 months (SD +/-6 months, range 3-20 months). In two patients with systemic sarcoidosis, the pulmonary changes improved in parallel with the skin. Side-effects were usually mild and resolved spontaneously upon dose reduction or discontinuation of the therapy. CONCLUSIONS The data presented here indicate that FAE may be considered for the treatment of recalcitrant granulomatous skin disease.
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Affiliation(s)
- K Breuer
- Department of Dermatology and Allergology, Hannover Medical University, Ricklinger Strasse 5, 30449 Hannover, Germany.
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26
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Tavassol F, Starke O, Völker B, Eckardt A. Expression of heat shock protein (HSP70) in oral lichen planus before and after topical treatment with tacrolimus. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)80875-6] [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: 11/26/2022]
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27
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Abstract
IgA pemphigus is a rare autoimmune intraepidermal blistering disease characterized by in vivo bound, and circulating IgA autoantibodies that target cell surface components (cadherins) of epidermal keratinocytes. The average age of onset is approximately 50 years. Histological hallmarks of IgA pemphigus are epidermal acantholysis, subcorneal or intraepidermal pustulosis, and neutrophilic infiltration. The main clinical characteristics are erythematous skin lesions with vesiculopustules, erosions, crusts and desquamation, favoring the trunk, groins, auxiliaries, and proximal extremities. The drug of choice for treating IgA pemphigus is diaminodiphenylsulfone. In this case study, we describe a patient who suffered from IgA pemphigus and responded well to diaminodiphenylsulfone.
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Affiliation(s)
- U Raap
- Klinik und Poliklinik für Dermatologie und Venerologie der Medizinischen Hochschule Hannover.
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28
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Abstract
A 56-year old female patient with cutaneous sarcoidosis in the face was treated with fumaric acid esters and doxycycline without any effect. Topical tacrolimus led clinically and histologically to a nearly complete remission within three months, which continued after 4 months of follow-up.
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Affiliation(s)
- R Gutzmer
- Klinik und Poliklinik für Dermatologie und Venerologie der Medizinischen Hochschule Hannover, Hannover.
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29
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Schwenkreis P, Janssen F, Rommel O, Pleger B, Völker B, Hosbach I, Dertwinkel R, Maier C, Tegenthoff M. Bilateral motor cortex disinhibition in complex regional pain syndrome (CRPS) type I of the hand. Neurology 2003; 61:515-9. [PMID: 12939426 DOI: 10.1212/wnl.61.4.515] [Citation(s) in RCA: 211] [Impact Index Per Article: 10.0] [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: 12/22/2022] Open
Abstract
BACKGROUND Complex regional pain syndrome type I (CRPS I) develops as a consequence of trauma affecting the limbs, without obvious nerve lesion. Its features include pain, edema, autonomic dysfunction, movement disorder, and trophic changes. CNS involvement is suggested by the symptoms, but the pathophysiology of CRPS I is unknown. OBJECTIVE To assess excitability changes in the motor cortex in patients with CRPS I. METHODS The authors studied 25 patients with unilateral CRPS I involving the hand by means of transcranial magnetic stimulation using a paired-pulse paradigm. Motor threshold (MT) and intracortical inhibition and facilitation were determined on the affected and the clinically unaffected side. A control group of 20 healthy subjects was studied. RESULTS The authors found a significant reduction of intracortical inhibition on both sides of patients with CRPS compared with control subjects, whereas intracortical facilitation and MT did not differ significantly. However, in the patients' group, the presence of allodynia significantly decreased MT. CONCLUSIONS The authors showed a bilateral disinhibition of the motor cortex in patients with complex regional pain syndrome.
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Affiliation(s)
- P Schwenkreis
- Department of Neurology, Ruhr-University Bochum, BG-Kliniken Bergmannsheil, Bochum, Germany.
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30
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Gutzmer R, Kaspari M, Brodersen JP, Mommert S, Völker B, Kapp A, Werfel T, Kiehl P. Specificity of tyrosinase and HMB45 PCR in the detection of melanoma metastases in sentinel lymph node biopsies. Histopathology 2002; 41:510-8. [PMID: 12460203 DOI: 10.1046/j.1365-2559.2002.01512.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS Sentinel lymph node biopsy is an increasingly established procedure in the primary staging of high-risk melanoma patients. However, the laboratory evaluation of sentinel lymph node biopsies is a matter of controversy. The aim of this study was to determine the specificity of polymerase chain reaction (PCR) techniques for the evaluation of lymph nodes with regard to melanoma metastases in comparison with histology and immunohistology. METHODS AND RESULTS Sentinel lymph nodes (n = 41) from 29 melanoma patients and 29 lymph nodes from 27 patients without melanoma were analysed by histology (H&E) and immunohistology (Melan A, HMB45). cDNA of these lymph nodes was subjected to LightCycler PCR amplification using primers specific for tyrosinase and HMB45. Two melanoma sentinel lymph nodes contained naevus cells by histology and immunohistology and were therefore excluded from further evaluation. Eight (20.5%) of the remaining 39 melanoma sentinel lymph nodes were positive by histology and immunohistology and tyrosinase PCR, 15.4% (6/39) were positive only by tyrosinase PCR, 2.6% (1/39) were positive only by histology and immunohistology. HMB45 PCR revealed positive results in 7.7% (3/39) sentinel lymph nodes, which were also positive by tyrosinase PCR and histology and immunohistology. Of non-melanoma lymph nodes 13.8% (4/29) and 14.8% (4/27) of non-melanoma patients were positive by tyrosinase PCR but negative by histology and immunohistology and HMB45 PCR. Thus, tyrosinase PCR had a specificity of only 85.2%. CONCLUSIONS The specificity of tyrosinase PCR and the sensitivity of HMB45 PCR are too low to recommend these PCR examinations for the guidance of therapy, in particular complete regional lymph node dissection.
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Affiliation(s)
- R Gutzmer
- Department of Dermatology and Allergology, Hannover Medical University, Ricklinger Strasse 5, D-30449 Hannover, Germany.
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31
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Strüber M, Cremer JT, Gohrbandt B, Hagl C, Jankowski M, Völker B, Rückoldt H, Martin M, Haverich A. Human cytokine responses to coronary artery bypass grafting with and without cardiopulmonary bypass. Ann Thorac Surg 1999; 68:1330-5. [PMID: 10543502 DOI: 10.1016/s0003-4975(99)00729-8] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Coronary artery bypass grafting (CABG) is associated with a systemic inflammatory response. This has been attributed to cytokine release caused by extracorporeal circulation and myocardial ischemia. This study compares the inflammatory response after CABG with cardiopulmonary bypass and after minimally invasive direct coronary artery bypass grafting (MIDCABG) without cardiopulmonary bypass. METHODS Cytokine release and complement activation (interleukin-6 and interleukin-8, soluble tumor necrosis factor receptors 1 and 2, complement factor C3a, and C1 esterase inhibitor) were determined in 24 patients before and after CABG or MIDCABG. The maximum body temperature, chest drainage, and fluid balance were recorded for 24 hours after operation. RESULTS Release of interleukin-6, interleukin-8, and tumor necrosis factor receptors 1 and 2 was significantly higher (p < or = 0.005) in the CABG group than the MIDCABG group just after operation. After 24 hours, a significant increase in interleukin-6 was also found in the MIDCABG group (p = 0.001) compared with preoperative value. Body temperature and fluid balance were significantly higher after CABG (p < or = 0.001). CONCLUSIONS Minimally invasive direct coronary artery bypass grafting represents a less traumatizing technique of surgical revascularization. The reduction in the inflammatory response may be advantageous for patients with a high degree of comorbidity.
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Affiliation(s)
- M Strüber
- Department of Anesthesia, Hannover Medical School, Germany.
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32
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Kiehl P, Matthies B, Ehrich K, Völker B, Kapp A. Accuracy of frozen section measurements for the determination of Breslow tumour thickness in primary malignant melanoma. Histopathology 1999; 34:257-61. [PMID: 10217567 DOI: 10.1046/j.1365-2559.1999.00621.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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
AIMS Microstaging of primary malignant melanoma (MM) and the width of surgical margins depend mainly on Breslow tumour thickness (BTT). The use of frozen section (FS) measurements of BTT has been doubted, and previous reports have shown conflicting results regarding the comparability to paraffin sections (PS). To look for significant differences of BTT due to freezing or paraffin embedding, we evaluated a larger series of melanocytic lesions as far as possible excluding other technical influences. METHODS AND RESULTS Paired 'mirror sections' of 112 melanocytic lesions (33 MM and 79 melanocytic naevi) were measured according to Breslow on single corresponding PS and FS of the same tumour specimen. Comparing measurements on FS and PS, we found very small differences of BTT on average and an almost equal distribution of BTT in the two sets of values with no statistically significant difference by applying the Wilcoxon signed rank test. Concerning the clinically most important 1 mm-threshold of BTT, 110 (98.2%) of the lesions gave equal measurements in FS and PS. CONCLUSIONS Frozen sections can be used for accurate measurements of Breslow tumour thickness. Consequently, intraoperative frozen section diagnosis of thick melanoma immediately followed by excision with wide surgical margins is possible in experienced centres.
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Affiliation(s)
- P Kiehl
- Department of Dermatology and Allergology, Hannover Medical University, Germany.
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33
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Reinhardt C, Völker B, Martin HJ, Kneiseler J, Fuhrmann GF. Different activation energies in glucose uptake in Saccharomyces cerevisiae DFY1 suggest two transport systems. Biochim Biophys Acta 1997; 1325:126-34. [PMID: 9106490 DOI: 10.1016/s0005-2736(96)00252-0] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The analysis of initial glucose uptake in Saccharomyces cerevisiae at 25 degrees, 20 degrees, 15 degrees and 10 degrees C by computer-assisted nonlinear regression analysis predicts two transport systems. The first demonstrates Michaelis-Menten kinetics and the second shows first order behaviour. The activation energies of these two systems were calculated by the Arrhenius equation at four different growth phases, namely early exponential (EE), middle exponential (ME2), late exponential (LE) and early stationary (ES) with 2% glucose in the batch medium. The activation energies calculated from the V(m) values in EE, ME, LE and ES growth phases were 15.8 +/- 1.7, 13.5 +/- 1.0, 15.1 +/- 0.8 and 13.5 +/- 0.7 kcal/mol. These values are in agreement with activation energies calculated for the first mechanism, facilitated diffusion, which is the mechanism deduced from countertransport experiments. The activation energies derived for the second transport system from the first order rate constants in cells grown to EE, ME2, LE and ES were 8.0 +/- 2.1, 8.1 +/- 1.3, 9.6 +/- 3.0 and 7.5 +/- 2.6 kcal/mol. These values are still significantly higher than for free diffusion of glucose in water and lower as predicted for passage of glucose through the lipid phase. Therefore, we assume in addition to carrier-mediated facilitated diffusion the entrance of glucose into the cell through a pore.
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Affiliation(s)
- C Reinhardt
- Department of Pharmacology and Toxicology, Philipps-University Marburg, Germany
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34
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Völker B, Martin HJ, Michaelis D, Fuhrmann GF. Is there a channel for glucose in the plasma membrane of saccharomyces cerevisiae? Folia Microbiol (Praha) 1997; 42:250-1. [PMID: 9378425 DOI: 10.1007/bf02818998] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- B Völker
- Department of Pharmacology and Toxicology, Philipps-University Marburg, Germany
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35
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Reinhardt C, Völker B, Martin HJ, Fuhrmann GF. Temperature dependence of glucose uptake inSaccharomyces cerevisiae DFY1 in different growth phases. Folia Microbiol (Praha) 1996. [DOI: 10.1007/bf02816369] [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: 11/27/2022]
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36
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Völker B, Pinnel S, Martin HJ, Fuhrmann GF. Glucose transport in Schizosaccharomyces pombe. Folia Microbiol (Praha) 1996; 41:128. [PMID: 9090853] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- B Völker
- Department of Pharmacology and Toxicology, Philipps-University Marburg, Germany
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37
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Martin HJ, Linder D, Völker B, Fuhrmann GF. Identification of putative glucose transporters in Saccharomyces cerevisiae DFY1. Folia Microbiol (Praha) 1996; 41:107. [PMID: 9090843 DOI: 10.1007/bf02816361] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- H J Martin
- Department of Pharmacology and Toxicology, Philipps University Marburg, Germany
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38
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Fuhrmann GF, Taimor A, Reinhardt C, Martin HJ, Völker B. Modelling glucose transport in Saccharomyces cerevisiae DFY1 in different growth phases. Folia Microbiol (Praha) 1996; 41:91-2. [PMID: 9090834 DOI: 10.1007/bf02816352] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- G F Fuhrmann
- Department of Pharmacology and Toxicology, Philipps-University Marburg, Germany
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39
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Abstract
It has become common practice to analyse the sugar transport kinetics from initial uptake rates in Saccharomyces cerevisiae cells with Eadie-Hofstee plots. These plots often demonstrate a nonlinear behaviour. They have been resolved incorrectly into two quasilinear components indicating the presence of (at least) two uptake systems or components, with Km values differing by a factor of about 10. This graphical analysis neglects the obvious additivity of the two hypothetical systems and is therefore in error. A more efficient way to determine kinetic parameters from initial uptake experiments is to use computer-assisted nonlinear regression analysis.
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Affiliation(s)
- G F Fuhrmann
- Department of Pharmacology and Toxicology, Philipps-University Marburg, Germany
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40
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Völker B, Kreutzfeldt C, Lehmann J, Fasold H, Fuhrmann G. Identification of 59 and 62 kDa plasma membrane proteins as putative glucose transporters in Saccharomyces cerevisiae. J Biotechnol 1992. [DOI: 10.1016/0168-1656(92)90030-d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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41
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Wrede C, Völker B, Küntzel H, Fuhrmann G. Kinetic analysis of glucose transport in wild-type and transporter-deficient Saccharomyces cerevisiae strains under glucose repression and derepression. J Biotechnol 1992. [DOI: 10.1016/0168-1656(92)90029-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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43
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Abstract
A high content of mast cells (MC) is considered characteristic of neurofibromas but not of malignant schwannomas and neurilemmomas. We examined the extent and reliability of this finding by counting MC in 61 peripheral nerve sheath tumors and in 103 non-neurogenic soft tissue sarcomas. We furthermore investigated correlations between the amount of MC and various features of the tumors (e.g. grades of malignancy). Neurofibromas had very high mast cell counts. However, this result only applied to about 70% of these tumors. Malignant schwannomas, malignant fibrous histiocytomas and leiomyosarcomas had remarkably high median values of MC counts with a wide dispersion within the histological groups. Synovial sarcomas were the only group that contained MC in every case, though often in small numbers. In univariate analyses the number of MC was negatively correlated to grades of malignancy, cellularity and mitotic activity of the sarcomas and tended to correlate positively to the amount of myxoid and collagenous connective tissue and lymphocytic infiltrates. Multiple linear regression analysis revealed a significant correlation to the grade of malignancy and the amount of connective tissue.
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Affiliation(s)
- K Donhuijsen
- Institute of Pathology, University of Essen, FRG
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44
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Fuhrmann GF, Völker B, Sander S, Potthast M. Kinetic analysis and simulation of glucose transport in plasma membrane vesicles of glucose-repressed and derepressed Saccharomyces cerevisiae cells. Experientia 1989; 45:1018-23. [PMID: 2689201 DOI: 10.1007/bf01950152] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this study experimental data on the kinetic parameters investigated by other authors 1-5, 11 together with own data on plasma membrane vesicles, have been subjected to a computer simulation based on the equations describing facilitated diffusion. The simulation led to an ideal fit describing the above data. From this it can be concluded that glucose is transported by facilitated diffusion, and not by active transport as was postulated by Van Steveninck 14,15. The simulation method also demonstrates that the fast sampling technique used by these authors 1-5, 11 underestimated the fluxes. Thus, the parameters given do not contribute to the understand of glucose transport under different metabolic conditions. The K value of plasma membrane vesicles prepared from glucose-repressed cells is around 7 mM. Derepression, particularly by galactose, causes a highly significant increase in affinity as shown by a decrease in the K value to 2 mM. The highest affinity was measured in a triple kinaseless mutant grown on glycerol with a K value of 1 mM. It seems, therefore, that the kinetic parameters derived from initial uptake rates of glucose in intact cells 1-5, 11 using single flux analysis, such as Eadie-Hofstee- or Lineweaver-Burk-plots, are in error.
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Affiliation(s)
- G F Fuhrmann
- Department of Pharmacology and Toxicology, Philipps-Universität Marburg, Federal Republic of Germany
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45
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Pflüger KH, Reimers CD, Neubert U, Meisel C, Trapp B, Leititis J, Völker B, Münchhoff P, Litzenberger J, Holthausen H. Lyme-borreliosis and possible association with HLA-antigens. Tissue Antigens 1989; 33:375-81. [PMID: 2741164 DOI: 10.1111/j.1399-0039.1989.tb01680.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The frequencies of HLA A, B, C and DR antigens were evaluated in 220 persons from West Germany with inapparent and manifest Borrelia burgdorferi infections. Thirty-seven forest workers showing elevated antibody titres against Borrelia burgdorferi had asymptomatic infection, and are described as stage 0. One hundred and eighty-three patients presented with the clinical stages 1-3 of the infection. Control persons (n = 655) were typed in the same time period and by identical staff. HLA CW3 was present in 36.3% of patients as compared to 23.2% of the controls (RR = 1.88, pcorr = 0.03) and was significantly associated with manifest infection. In addition, the antigen A2 was found slightly but not significantly more frequent in the patients (55.2% vs 44%; pcorr = 0.41). The phenotype combination HLA A2 and Cw3, however, was significantly elevated in patients (24.6% vs 10.8%; pcorr = 0.0005). In contrast to these class 1 antigens, HLA DR3 showed a tendency of negative association with manifest infection. But this finding was not yet found to be significant (15.3% vs 25.3%; RR = 0.53, pcorr = 0.26). The frequency of HLA DR2 showed a constant decrease from stage 0 to stage 3 (inapparent infection to late complications). Using the rank correlation coefficient of Spearman, this association was found to be significant (-1.00, p less than or equal to 0.05). All other tested HLA antigens and antigen combinations showed no significant differences. The data suggest that HLA CW3 may be associated with Borrelia burgdorferi infection, whereas HLA DR2 and DR3 may be associated with less incidence of severe courses and less complications in this disorder.
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Affiliation(s)
- K H Pflüger
- Department of Haematology and Oncology, University of Marburg, Federal Republic of Germany
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46
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Müller P, Völker B. [Are involuntary commitments decreasing due to impediments in the procedure?]. Offentl Gesundheitswes 1988; 50:27-30. [PMID: 2964576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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47
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Völker B. [Strabismus]. Med Monatsschr Pharm 1987; 10:34-5. [PMID: 3561317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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48
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Völker B. [Glaucoma]. Med Monatsschr Pharm 1987; 10:2-5. [PMID: 3561314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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49
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Völker B. [Retinal diseases]. Med Monatsschr Pharm 1986; 9:328-30. [PMID: 3807802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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50
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Völker B. [Diseases of the iris and choroid]. Med Monatsschr Pharm 1986; 9:290-2. [PMID: 3784962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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