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Ryba A, Özdemir Z, Nissimov N, Hönikl L, Neidert N, Jakobs M, Kalasauskas D, Krigers A, Thomé C, Freyschlag CF, Ringel F, Unterberg A, Dao Trong P, Beck J, Heiland DH, Meyer B, Vajkoczy P, Onken J, Stummer W, Suero Molina E, Gempt J, Westphal M, Schüller U, Mohme M. Insights from a Multicenter Study on Adult H3 K27M-Mutated Glioma: Surgical Resection's Limited Influence on Overall Survival, ATRX as Molecular Prognosticator. Neuro Oncol 2024:noae061. [PMID: 38507506 DOI: 10.1093/neuonc/noae061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/04/2023] [Indexed: 03/22/2024] Open
Abstract
BACKGROUND H3 K27M-mutated gliomas were first described as a new grade 4 entity in the 2016 WHO classification. Current studies have focused on its typical appearance in children and young adults, increasing the need to better understand the prognostic factors and impact of surgery on adults. Here, we report a multicentric study of this entity in adults. METHODS We included molecularly confirmed H3 K27M-mutated glioma cases in patients >18 years diagnosed between 2016 and 2022. Clinical, radiological, and surgical features were analyzed. Univariate and multivariate analyses were performed to identify prognostic factors. RESULTS Among 70 patients with a mean age of 36.1 years, the median overall survival (OS) was 13.6 + 14 months. Gross-total resection was achieved in 14.3% of patients, whereas 30% had a subtotal resection and 54.3% a biopsy.Tumors located in telencephalon/diencephalon/myelencephalon were associated with a poorer OS, while a location in the mesencephalon/metencephalon showed a significantly longer OS (8.7 vs. 25.0 months, p=0.007). Preoperative Karnofsky Performance Score (KPS) < 80 showed a reduced OS (4.2 vs. 18 months, p=0.02). Furthermore, ATRX loss, found in 25.7%, was independently associated with an increased OS (31 vs. 8.3 months, p=0.0029). Notably, patients undergoing resection showed no survival benefit over biopsy (12 vs. 11 months, p=0.4006). CONCLUSION The present study describes surgical features of H3 K27M-mutated glioma in adulthood in a large multicentric study. Our data reveal that ATRX status, location and KPS significantly impact OS in H3 K27M-mutated glioma. Importantly, our dataset indicates that resection does not offer a survival advantage over biopsy.
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Affiliation(s)
- A Ryba
- Department of Neurosurgery, Medical Center Hamburg-Eppendorf, Germany
| | - Z Özdemir
- Department of Neurosurgery, University Hospital of Münster, Germany
| | - N Nissimov
- Department of Neurosurgery, Charité University Hospital Berlin, Germany
| | - L Hönikl
- Department of Neurosurgery, Technical University Munich, Germany
| | - N Neidert
- Department of Neurosurgery, Medical Center - University of Freiburg, Germany
| | - M Jakobs
- Department of Neurosurgery, Heidelberg University Hospital, Germany
- Department of Neurosurgery, Division of Stereotactic Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
- Heidelberg University, Medical Faculty, Heidelberg, Germany
| | - D Kalasauskas
- Department of Neurosurgery, University Medical Center Mainz, Germany
| | - A Krigers
- Department of Neurosurgery, Medical University of Innsbruck, Austria
| | - C Thomé
- Department of Neurosurgery, Medical University of Innsbruck, Austria
| | - C F Freyschlag
- Department of Neurosurgery, Medical University of Innsbruck, Austria
| | - F Ringel
- Department of Neurosurgery, University Medical Center Mainz, Germany
| | - A Unterberg
- Department of Neurosurgery, Heidelberg University Hospital, Germany
- Heidelberg University, Medical Faculty, Heidelberg, Germany
| | - P Dao Trong
- Department of Neurosurgery, Heidelberg University Hospital, Germany
- Heidelberg University, Medical Faculty, Heidelberg, Germany
| | - J Beck
- Department of Neurosurgery, Medical Center - University of Freiburg, Germany
| | - D H Heiland
- Department of Neurosurgery, Medical Center - University of Freiburg, Germany
| | - B Meyer
- Department of Neurosurgery, Technical University Munich, Germany
| | - P Vajkoczy
- Department of Neurosurgery, Charité University Hospital Berlin, Germany
| | - J Onken
- Department of Neurosurgery, Charité University Hospital Berlin, Germany
| | - W Stummer
- Department of Neurosurgery, University Hospital of Münster, Germany
| | - E Suero Molina
- Department of Neurosurgery, University Hospital of Münster, Germany
| | - J Gempt
- Department of Neurosurgery, Medical Center Hamburg-Eppendorf, Germany
| | - M Westphal
- Department of Neurosurgery, Medical Center Hamburg-Eppendorf, Germany
| | - U Schüller
- Institute of Neuropathology, Medical Center Hamburg-Eppendorf, Germany
- Department of Pediatric Hematology and Oncology, Medical Center Hamburg-Eppendorf, Germany
- Research Institute Children's Cancer Center Hamburg, Germany
| | - M Mohme
- Department of Neurosurgery, Medical Center Hamburg-Eppendorf, Germany
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Jakobs M, Hadamitzky M, Schedlowski M, Heiß-Lückemann L. [Conditioning of the immune system-Already clinically usable?]. Z Rheumatol 2023:10.1007/s00393-023-01384-9. [PMID: 37402018 DOI: 10.1007/s00393-023-01384-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2023] [Indexed: 07/05/2023]
Abstract
The brain and the immune system permanently exchange information via various neuronal and humoral signaling pathways. This communication network forms the basis for controlling peripheral immune functions via associative learning or conditioning processes. Establishing a learned immune reaction, an immunomodulatory drug that represents the unconditioned stimulus (US) is paired with a new odor or taste stimulus. Re-presentating this previously neutral odor or taste stimulus, its now functions as a conditioned stimulus (CS) and triggers reactions in the immune system similar to those formerly induced by the drug used as US. Using different learning protocols, it was possible to condition immunopharmacological effects in animal disease models, such as lupus erythematosus, contact allergy or rheumatoid arthritis, thereby reducing disease symptoms. Preliminary experimental studies in healthy volunteers and patients confirmed a possible clinical use of learned immune responses with the aim of using associative learning protocols as complementary measures to pharmacological interventions in clinical practice in order to reduce drug doses and thus undesirable drug side effects while maintaining therapeutic efficacy. However, there is still a great need for further research to understand the mechanisms of learned immune responses in preclinical studies and to optimize the associative learning processes for using them in the clinical routine in studies with healthy volunteers and patients.
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Affiliation(s)
- M Jakobs
- Institut für Medizinische Psychologie und Verhaltensimmunbiologie, Center for Translational Neuro- and Behavioral Sciences (C-TNBS), Universitätsklinikum Essen, Universität Duisburg-Essen, Hufelandstr. 55, 45122, Essen, Deutschland
| | - M Hadamitzky
- Institut für Medizinische Psychologie und Verhaltensimmunbiologie, Center for Translational Neuro- and Behavioral Sciences (C-TNBS), Universitätsklinikum Essen, Universität Duisburg-Essen, Hufelandstr. 55, 45122, Essen, Deutschland
| | - M Schedlowski
- Institut für Medizinische Psychologie und Verhaltensimmunbiologie, Center for Translational Neuro- and Behavioral Sciences (C-TNBS), Universitätsklinikum Essen, Universität Duisburg-Essen, Hufelandstr. 55, 45122, Essen, Deutschland
- Department of Clinical Neuroscience, Osher Center for Integrative Medicine, Karolinska Institutet, 171 77, Stockholm, Schweden
| | - L Heiß-Lückemann
- Institut für Medizinische Psychologie und Verhaltensimmunbiologie, Center for Translational Neuro- and Behavioral Sciences (C-TNBS), Universitätsklinikum Essen, Universität Duisburg-Essen, Hufelandstr. 55, 45122, Essen, Deutschland.
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Alhalabi OT, Sahm F, Unterberg AW, Jakobs M. P11.73.B The diagnostic value of frame-based stereotactic biopsies in the age of precision oncology: A cross-sectional study. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac174.262] [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: 11/13/2022] Open
Abstract
Abstract
Background
For non-resectable, eloquent, multifocal and deep-seated intracranial lesions, stereotactic frame-based biopsies can deliver a finite amount of tissue for neuropathology studies. With the increasing role of molecular genetics in the diagnostics of intracranial tumors, sufficient tissue for sequencing studies is of paramount importance. This study explored the rate of successful diagnosis after stereotactic frame-based biopsies of intracranial lesions in a high-throughput neurooncology center
Material and Methods
145 consecutive patients undergoing frame-based stereotactic biopsies in 2020 and 2021 at our neurosurgical department were included in this retrospective analysis. Aspects of histological and molecular (methylomics, panel-sequencing) neuropathology analysis in addition to clinical and radiological variables were analyzed. Cases were classified as conclusive, likely-conclusive (sufficient diagnosis with non-satisfying sequencing information), and inconclusive neuropathological diagnosis.
Results
Of 145 cases analyzed, astrocytic tumors were suspected in n= 94 (67%) of patients. In n= 122 cases (84%), a conclusive diagnosis was possible. For 14 (11%) cases, a likely-conclusive diagnosis was established Diagnoses comprised mainly WHO 4 glioblastomas (56%), WHO 3 gliomas (2%) in addition to WHO 1 and 2 gliomas (n=7, 5%), CNS lymphomas (n=23, 16%), inflammatory diseases (n=10, 7%) and normal or reactive tissue (n=4, 3%). Methylomics were pivotal in providing an integrated diagnosis in 30% of the cases (panel sequencing in 14%). In n= 12 (8%) of the cases further testing was hindered by insufficient tissue sample DNA. Only in 3 out of 12 cases this resulted in a final inconclusive diagnosis.
Conclusion
Although stereotactic frame-based biopsies deliver a limited amount of tissue, they bear an excellent histopathological and molecular genetic diagnostic yield, with rare cases of missing molecular data or rarely insufficient diagnosis. Optimizing the number and representativeness of cell and DNA-rich stereotactic biopsy specimen might enhance the diagnostic and therapeutic potential of precision oncology even further.
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Affiliation(s)
- O T Alhalabi
- Department of Neurosurgery, Heidelberg University Hospital , Heidelberg , Germany
| | - F Sahm
- Department of Neuropathology, Heidelberg University Hospital , Heidelberg , Germany
| | - A W Unterberg
- Department of Neurosurgery, Heidelberg University Hospital , Heidelberg , Germany
| | - M Jakobs
- Department of Neurosurgery, Heidelberg University Hospital , Heidelberg , Germany
- Division of Stereotactic Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital , Heidelberg , Germany
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Abstract
In mammals and flies, only one cell in a multicellular female germline cyst becomes an oocyte, but how symmetry is broken to select the oocyte is unknown. Here, we show that the microtubule (MT) minus end-stabilizing protein Patronin/CAMSAP marks the future Drosophila oocyte and is required for oocyte specification. The spectraplakin Shot recruits Patronin to the fusome, a branched structure extending into all cyst cells. Patronin stabilizes more MTs in the cell with the most fusome material. Our data suggest that this weak asymmetry is amplified by Dynein-dependent transport of Patronin-stabilized MTs. This forms a polarized MT network, along which Dynein transports oocyte determinants into the presumptive oocyte. Thus, Patronin amplifies a weak fusome anisotropy to break symmetry and select one cell to become the oocyte.
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Affiliation(s)
- D. Nashchekin
- The Gurdon Institute and the Department of Genetics, University of Cambridge; Tennis Court Road, Cambridge CB2 1QN, United Kingdom,Corresponding author. ,
| | - L. Busby
- The Gurdon Institute and the Department of Genetics, University of Cambridge; Tennis Court Road, Cambridge CB2 1QN, United Kingdom
| | - M. Jakobs
- The Department of Physiology, Development and Neuroscience, University of Cambridge; Cambridge CB2 3DY, United Kingdom
| | - I. Squires
- The Gurdon Institute and the Department of Genetics, University of Cambridge; Tennis Court Road, Cambridge CB2 1QN, United Kingdom
| | - D. Johnston
- The Gurdon Institute and the Department of Genetics, University of Cambridge; Tennis Court Road, Cambridge CB2 1QN, United Kingdom,Corresponding author. ,
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Krukemeyer MG, Wagner W, Jakobs M, Hartlapp JH, Krenn V. Tumor regression by means of iron oxide cytostatic drug targeting. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e13502] [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: 11/20/2022] Open
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Krenn V, Kurz B, Krukemeyer MG, Knoess P, Jakobs M, Poremba C, Möllenhoff G. [Histopathological degeneration score of fibrous cartilage. Low- and high-grade meniscal degeneration]. Z Rheumatol 2011; 69:644-52. [PMID: 20213088 DOI: 10.1007/s00393-010-0609-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Although histopathology of meniscal degeneration plays an important role, no criteria to assess severity of the degeneration are available to date. Our aim was to create a histopathological scoring system for meniscal degeneration with good interobserver variability, taking matrix degradation and cellularity in meniscal tissue into consideration. Degeneration is classified as follows: grade 1 (low), grade 2 (intermediate), grade 3 (high). The pattern of NITEGE deposits (G1 fragment of aggrecan) was assessed immunohistochemically (n=38) and compared with the grades of degeneration. In 48% of the patients with grade 2 or 3 degeneration extracellular NITEGE deposits (specificity 100%) were found, whereas grade 1 patients showed no deposits. Extracellular NITEGE deposits correlated positively with the grade of degeneration. In all, 30 cases (10 per grade) were assessed by three pathologists (A, B, C). Grading conformity was 70% for grade 1, 66% for grade 2 and 100% for grade 3. Cohen's Kappa coefficient was 0.6--0.7 between pairs of observers. Combining grade 1 and 2 to low-grade degeneration, compared to a grade-3 high-grade degeneration achieved Kappa coefficients of between 0.93 and 1.0. This reproducible degeneration score for fibrous cartilage could form the basis for the standardized assessment of meniscal degeneration.
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Affiliation(s)
- V Krenn
- Zentrum für Histologie, Zytologie und Molekulare Diagnostik Trier, 54296 Trier, Deutschland.
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Krenn V, Knöss P, Rüther W, Jakobs M, Otto M, Krukemeyer MG, Heine A, Möllenhoff G, Kurz B. [Meniscal degeneration score and NITEGE expression : immunohistochemical detection of NITEGE in advanced meniscal degeneration]. Orthopade 2010; 39:475-85. [PMID: 20221825 DOI: 10.1007/s00132-010-1606-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Meniscal degeneration (MD) is a structural change of fibrous cartilage that is common in orthopaedic diagnostics and relevant for health insurance matters. So far, there has been neither a standardised scoring system nor an immunohistochemical marker for MD. MATERIAL AND METHOD In this retrospective trial, the meniscal tissue of 60 patients was assessed immunohistochemically for NITEGE (G1 fragment of the proteoglycan aggrecan) expression. NITEGE expression was correlated with defined grades of MD: little (grade 0/1), medium (grade 2), or severe (grade 3). RESULTS Detection of extracellular NITEGE deposits in grade 2 or 3 MD had a positive predictive value and specificity of 100%, whereas no deposits were found in grade 0/1 MD. Sensitivity in advanced MD was 55%. Detection of extracellular NITEGE correlated positively with the grade of degeneration, as did patient age and the grade of degeneration. The patient age of those with grade 0/1 MD was significantly lower than for grade 3 (p<0.0001). CONCLUSION The thoroughly defined degeneration score (grade 1 - grade 3 MD) is suitable to assess the severity of degeneration. Extracellular NITEGE deposits can be regarded as an immunohistochemical marker for advanced (grades 2 and 3) MD.
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Affiliation(s)
- V Krenn
- Zentrum für Histologie, Zytologie und Molekulare Diagnostik, Max-Planck-Strasse 18+20, 54296, Trier, Deutschland.
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Krenn V, Jakobs M, Kriegsmann J, Krukemeyer MG, Rieger A. [Is bioptic assurance reasonable in patients with Sjögren's syndrome? From focus score to diagnosing vasculitides]. Z Rheumatol 2010; 69:11-8. [PMID: 19997922 DOI: 10.1007/s00393-009-0514-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [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
Sjögren's syndrome is an autoimmune disease which targets the salivary and lacrimal glands in particular, causing sicca syndrome. Extraglandular manifestations are often seen. Chronic sialadenitis of the parotid gland is the most common symptom to be assessed for differential diagnosis. Common HE and Giemsa slices are histopathologically examined and graduated for lymphocyte infiltration (focus): grade 0: absent, grade 1: slight, grade 2: moderate non-focal infiltration, grade 3: 1 focus (> or =50 lymphocytes) per 4 mm2, grade 4: >1 focus. Grade 3 infiltrates correspond to a focus score of 1, which is one of four disease-classifying criteria acknowledged for diagnosis. Bioptic examination is also performed to rule out different (non-) immunologic sialadenitises, such as the necrotizing or epithelioid-like form (in sarcoidosis), and the extranodal marginal-zone lymphoma. Extraglandular manifestations of Sjögren's syndrome can also be safely diagnosed by histopathological examination. Emphases lie on vasculitides and myositides. Bioptic work-up, therefore, is not only reasonable but also an essential tool for diagnostics in Sjögren's syndrome.
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Affiliation(s)
- V Krenn
- Zentrum für Histologie, Zytologie und Molekulare Diagnostik, Max-Planck-Str. 18+20, 54296 Trier.
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Abstract
The expression ‘magnetic drug targeting’ is understood as meaning the targeted administration of a drug, for example, a cytostatic, with the intention of optimizing the local therapeutic effect. A magnetic field strength of 0.6 T is applied externally to the body. Iron oxides are administered intravasally into a vein. Cytostatics are bonded to the iron oxides. This form of administration, also known as sluicing, is particularly suitable for cytostatics, since the intention is to achieve a high concentration of the cytostatic at the target site (site of the tumor), but to minimize the harmful effect in the rest of the tissue. A reduction in tumor volume under the magnetic field and in the liver of 45–90% has been detected by MRI.
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Affiliation(s)
- MG Krukemeyer
- Ärztlicher Direktor der Paracelsus-Klinik Osnabrück, Leiter der Abteilung Strahlenklinik, Abteilung Strahlentherapie, Sedanstr. 109, D-49076 Osnabrück, Germany
| | - W Wagner
- Ärztlicher Direktor der Paracelsus-Klinik Osnabrück, Leiter der Abteilung Strahlenklinik, Abteilung Strahlentherapie, Sedanstr. 109, D-49076 Osnabrück, Germany
| | - M Jakobs
- Zentrum für Histologie, Zytologie & Molekulare Diagnostik, Wissenschaftspark Trier, Max-Planck-Str. 18 + 20, D-54296 Trier, Germany
| | - V Krenn
- Zentrum für Histologie, Zytologie & Molekulare Diagnostik, Wissenschaftspark Trier, Max-Planck-Str. 18 + 20, D-54296 Trier, Germany
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de Vries M, Deijs M, Canuti M, Jakobs M, van Schaik B, Faria N, Molenkamp R, Baas F, van der Hoek L. OP4-8 Virus discovery 454 sequencing. J Clin Virol 2009. [DOI: 10.1016/s1386-6532(09)70063-0] [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: 11/15/2022]
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Abstract
Fibroblasts and myofibroblasts play an important role in the pathogenesis of systemic sclerosis, fibromatoses, arthrofibrosis, and Ormond's disease. These conditions are characterized by an excessive fibroblast proliferation and partly accompanied by inflammation. Scleroderma is either localized or systemic, and features additional vasculopathy. Scleroderma-like skin lesions can be found in graft-versus-host disease following allogeneic hematopoietic stem cell transplantation, complicated malignoma or can represent an adverse drug reaction. The fibromatoses are found in superficial, or as semi-malignant desmoids in deep body compartments. Ormond's disease is a chronic periaortitis of unknown origin which extends into the retroperitoneal space. The diagnostic relevance of a histopathological diagnosis of fibrosing diseases varies and ranges from a disease-supporting to a disease-defining value.
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Affiliation(s)
- U A Walker
- Rheumatologische Universitätsklinik, Universität Basel, Burgfelderstrasse 101, Basel, Switzerland.
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Gorny M, Jakobs M, Mykhaylova V, Urbanetz NA. Quantifying the Degree of Disorder in Micronized Salbutamol Sulfate Using Moisture Sorption Analysis. Drug Dev Ind Pharm 2008; 33:235-43. [PMID: 17454056 DOI: 10.1080/03639040601128647] [Citation(s) in RCA: 7] [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: 10/23/2022]
Abstract
Salbutamol sulfate is often micronized for use in dry powder inhalers. Therefore, it is of high interest to quantify the amorphous amount. It was investigated whether moisture sorption is able to measure the amorphous content of salbutamol sulfate. Different mixtures of amorphous and crystalline salbutamol sulfate were analyzed by moisture sorption. The amorphous material was obtained by spray drying. The measurement results were used to plot a calibration curve, which was used to quantify the amorphous amount in micronized salbutamol sulfate.
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Affiliation(s)
- Matthias Gorny
- Institut fuer Pharmazeutische Technologie und Biopharmazie, Heinrich-Heine-Universitaet Duesseldorf, Universitaetsstrasse 1, Duesseldorf, Germany
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Jakobs M, Morawietz L, Rothschenk H, Hopf T, Weiner S, Schausten H, Krukemeyer MG, Krenn V. [Synovitis score: value of histopathological diagnostics in unclear arthritis. Case reports from rheumatological pathological practice]. Z Rheumatol 2008; 66:706-12. [PMID: 18000669 DOI: 10.1007/s00393-007-0232-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Histopathological assessment of synovial biopsies has an established value. The value for inflammatory joint diseases without standardized rating mechanisms was, however, unknown until recently. The exemplary use of the synovitis score in four cases all including recurrent bruises of the knee joint portrays its value for diagnosis and therapy. Usage of the score includes assessing the enlargement of the lining layer, cellular density of synovial stroma and leucocyte infiltration by giving each a score of 0-3 points and adding them. Presence of high-grade synovitis (>or=4 points) in all cases displayed the reason for the joint bruises within a primarily inflammatory, rheumatoid circle. In this report we show the broad variety of uses for the synovitis score dealing with cases of Lyme arthritis, rheumatoid arthritis, seronegative monarthritis and HLA-B27-positive peripheral arthritis.
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Affiliation(s)
- M Jakobs
- Zentrum für Histologie, Zytologie und molekulare Diagnostik Trier, Max-Planck-Strasse 18-20, 54296, Trier, Germany
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de Meulemeester M, Vink A, Jakobs M, Hermsen M, Steenman M, Slater R, Dietrich A, Mannens M. The application of microwave denaturation in comparative genomic hybridization. Genet Anal 1996; 13:129-33. [PMID: 9021402 DOI: 10.1016/s1050-3862(96)00162-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Comparative genomic hybridization (CGH) is a powerful tool for analyzing unbalanced chromosomal rearrangements in a variety of tissues. However, reproducibility of the technique is poor. We have developed an alternative protocol involving microwave denaturation of the metaphase chromosome preparations prior to the hybridization step. The advantage of this method for CGH is the retention of the morphology of the chromosomes and hence an improved chromosome banding pattern. Furthermore, it results in a consistently strong hybridization which is not dependent on the batch of lymphocytes used to obtain the metaphase chromosome spreads. This procedure has also proved to be applicable to nucleic acid hybridizations in general. The protocol, its application and the results of this method in CGH is discussed. Furthermore preliminary results of this method in paint and DNA probe hybridizations to chromosome spreads and to RNA in tissue sections are presented.
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Affiliation(s)
- M de Meulemeester
- Institute of Human Genetics, University of Amsterdam, Academic Medical Centre, Netherlands
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Zachleder V, Jakobs M, van den Ende H. Relationship between gametic differentiation and the cell cycle in the green alga Chlamydomonas eugametos. ACTA ACUST UNITED AC 1991. [DOI: 10.1099/00221287-137-6-1333] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Jakobs M. ["Mother, mother, he didn't drill anything"]. Quintessenz J 1976; 6:37-8. [PMID: 1077124] [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: 12/25/2022]
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Abstract
Phytochrome control of protein metabolism has been analyzed in the cotyledons of the mustard seedling (Sinapis alba L.) which can be regarded as being representative of dicotyledonous seedlings. A mustard seedling is a closed system for nitrogen under our experimental conditions. Fig. 2 shows the kinetics of protein content in the cotyledons of the mustard seedling in darkness and under the influence of continuous far-red irradiation, i.e. under the influence of a low but virtually constant concentration of phytochrome 730. -In order to understand these two curves it must be realized that the cotyledons of the mustard seedling contain much storage protein which will be degraded during the development of the seedling. The resulting amino acids are either translocated to other parts of the seedling or used within the cotyledons for the synthesis of enzymes and structural protein. -Histochemical studies have shown (HäCKER, 1966) that under the influence of far-red light the degradation of storage protein in the cotyledons is enhanced; at the same time, however, phytochrome 730 stimulates a strong de novo synthesis of structural and enzyme protein in the cotyledons. -This interpretation of the data on protein content is supported by evidence of the phytochrome-enhanced incorporation of (14)C into the protein fraction after an application of (14)C-Leucine (U) (Figs. 5, 6). - All present findings on phytochrome-controlled protein synthesis agree with the hypothesis that phytochrome 730 exerts its function through a differential gene activation (MOHR, 1966b).
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Affiliation(s)
- M Jakobs
- Botanisches Institut der Universität Freiburg i. Br., Freiburg i. Br., Deutschland
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