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Blumberg C, Liborius L, Ackermann J, Tegude FJ, Poloczek A, Prost W, Weimann N. Spatially controlled VLS epitaxy of gallium arsenide nanowires on gallium nitride layers. CrystEngComm 2020. [DOI: 10.1039/c9ce01926j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
MOVPE of Au catalyzed p-GaAs nanowires on n-GaN layers. Left: VLS growth optimization (density and morphology). Middle and right: site-controlled pn-junctions by lateral and vertical anisotropic NWs in structured SiOx openings (scalebar 1 μm).
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Ackermann J, Krueger A. Efficient surface functionalization of detonation nanodiamond using ozone under ambient conditions. NANOSCALE 2019; 11:8012-8019. [PMID: 30946413 DOI: 10.1039/c9nr01716j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Oxidative treatment is an important method for the purification and functionalization of carbon nanomaterials. Here we report on the treatment of detonation diamond particles with ozone at low temperatures. The homogeneous reaction in colloidal dispersion opens up a novel path for the efficient and homogeneous functionalization of the surface of nanodiamond with ozonides. As these are stable under the chosen ozonolysis conditions, they can be transformed to a number of different surface groups in subsequent oxidative or reductive workup steps. This versatile method for the preparation of oxygen-terminated diamond nanoparticles provides excellent control over the composition of the surface moieties in a waste-free and easy to set up way.
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Pahls J, Ackermann J, Holthaus B, Noé G, Maass N, Alkatout I. Entwicklung einer Methode zur initialen Leistungseinstufung für einen besseren individuellen Lernerfolg in Trainingskursen für operative Laparoskopie. Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1671403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Baumann J, Ackermann J, Holthaus B, Noé G, Maass N, Alkatout I. Evaluation eines neuartigen Pelvitrainers im Rahmen eines strukturierten Kurses für minimalinvasive Chirurgie in einem interdisziplinären und multizentrischen Setting. Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1671082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Ackermann J, Hagedorn H, Maass N, Wedel T, Alkatout I. The glycerin-based cadaver preservation – A technique that enables training of laparoscopic surgery on human body donor. Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1671081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Karlstetter M, Kopatz J, Aslanidis A, Shahraz A, Caramoy A, Linnartz-Gerlach B, Lin Y, Lückoff A, Fauser S, Düker K, Claude J, Wang Y, Ackermann J, Schmidt T, Hornung V, Skerka C, Langmann T, Neumann H. Polysialic acid blocks mononuclear phagocyte reactivity, inhibits complement activation, and protects from vascular damage in the retina. EMBO Mol Med 2017; 9:154-166. [PMID: 28003336 PMCID: PMC5286381 DOI: 10.15252/emmm.201606627] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Age‐related macular degeneration (AMD) is a major cause of blindness in the elderly population. Its pathophysiology is linked to reactive oxygen species (ROS) and activation of the complement system. Sialic acid polymers prevent ROS production of human mononuclear phagocytes via the inhibitory sialic acid‐binding immunoglobulin‐like lectin‐11 (SIGLEC11) receptor. Here, we show that low‐dose intravitreal injection of low molecular weight polysialic acid with average degree of polymerization 20 (polySia avDP20) in humanized transgenic mice expressing SIGLEC11 on mononuclear phagocytes reduced their reactivity and vascular leakage induced by laser coagulation. Furthermore, polySia avDP20 prevented deposition of the membrane attack complex in both SIGLEC11 transgenic and wild‐type animals. In vitro, polySia avDP20 showed two independent, but synergistic effects on the innate immune system. First, polySia avDP20 prevented tumor necrosis factor‐α, vascular endothelial growth factor A, and superoxide production by SIGLEC11‐positive phagocytes. Second, polySia avDP20 directly interfered with complement activation. Our data provide evidence that polySia avDP20 ameliorates laser‐induced damage in the retina and thus is a promising candidate to prevent AMD‐related inflammation and angiogenesis.
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Ackermann J, Hogreve H. Stability and spectral properties of the dication Ne2+2. Phys Chem Chem Phys 2017; 19:32433-32442. [DOI: 10.1039/c7cp07194a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Two different types of metastable states in Ne2+2 are predicted and possible decay transitions as well as the ensuing lifetimes and intensity distributions are studied.
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Alkatout I, Mettler L, Maass N, Ackermann J. Robotic surgery in gynecology. J Turk Ger Gynecol Assoc 2016; 17:224-232. [PMID: 27990092 DOI: 10.5152/jtgga.2016.16187] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 09/27/2016] [Indexed: 01/24/2023] Open
Abstract
Robotic surgery is the most dynamic development in the sector of minimally invasive operations currently. It should not be viewed as an alternative to laparoscopy, but as the next step in a process of technological evolution. The advancement of robotic surgery, in terms of the introduction of the Da Vinci Xi, permits the variable use of optical devices in all four trocars. Due to the new geometry of the "patient cart," an operation can be performed in all spatial directions without re-docking. Longer instruments and the markedly narrower mechanical elements of the "patient cart" provide greater flexibility as well as access similar to those of traditional laparoscopy. Currently, robotic surgery is used for a variety of indications in the treatment of benign gynecological diseases as well as malignant ones. Interdisciplinary cooperation and cooperation over large geographical distances have been rendered possible by telemedicine, and will ensure comprehensive patient care in the future by highly specialized surgery teams. In addition, the second operation console and the operation simulator constitute a new dimension in advanced surgical training. The disadvantages of robotic surgery remain the high costs of acquisition and maintenance as well as the laborious training of medical personnel before they are confident with using the technology.
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Ackermann J, Kanzow M, Mathiak M, Pecks U, Maass N, Alkatout I. Endoscopic removal of a retained surgical sponge in a young Syrian refugee after Caesarean section: a case report with discussion of cultural and political consequences. Patient Saf Surg 2016; 10:22. [PMID: 27800018 PMCID: PMC5080713 DOI: 10.1186/s13037-016-0111-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 10/13/2016] [Indexed: 11/24/2022] Open
Abstract
Background Inadvertently retained sponges and instruments still constitute a major but preventable complication in surgery. Given the high geographic mobility of patients, the fluctuation of physician-patient contact, and communication problems due to language barriers, the conscientious use of structured safety protocols in clinical routine is an essential aspect of quality in health care. Case presentation We report the case of a 24-year-old refugee from Syria who presented at our gynecological outpatient department with a tumor in the lower abdomen, suspected to be a lump in the ovary or the uterus. Language barriers hindered exact recording of the patient’s medical history. We knew she had undergone three Caesarean sections several years ago. The diagnostic laparoscopy unexpectedly revealed a tumor suspected to be a retained surgical sponge. The lesion was removed completely and the patient discharged from the clinic five days later. Conclusion In ambiguous cases, the diagnostic and therapeutic potential of minimally invasive surgery ensures safe and effective treatment of the patient, a short hospital stay, and low rates of complications. Especially in cases of language and/or cultural barriers, structured safety protocols should be a part of clinical routine in order to prevent unnecessary complications.
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Ackermann J, Hagenbach A, Abram U. {Tc(NO)(Cp)(PPh3)}+– a novel technetium(i) core. Chem Commun (Camb) 2016; 52:10285-8. [DOI: 10.1039/c6cc05811f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Access to pseudotetrahedral [Tc(NO)(Cp)(PPh3)X]0,+complexes (X = halide, Ph, CO) has been found by a convenient procedure starting from [Tc(NO)Y2(PPh3)2(MeCN)] (Y = Cl, Br) and subsequent ligand exchange reactions.
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Abstract
The design of DNA sequences plays a fundamental role for many biomolecular applications and is one of the most important theoretical tasks to fathom the potential of molecular information processing. Optimization strategies have been based on the model of stiff “digital” polymers by counting the number of base mismatches (Hamming distance and related distances). In this work we show the limitation of such a combinatorial approach because of the ability of DNA to build more complex structures. We develop a model platform to optimize word sets according to all possible secondary structures occurring for the relevant word-word interactions. The fidelity of the hybridization reactions can be improved significantly and as an example of a set of 24 words of 16-mers we show that the optimal set has unique physical properties, such as binding energy, melting temperature, and G+C content.
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Ackermann J, Einloft J, Nöthen J, Koch I. Reduction techniques for network validation in systems biology. J Theor Biol 2012; 315:71-80. [PMID: 22982289 DOI: 10.1016/j.jtbi.2012.08.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 08/27/2012] [Accepted: 08/29/2012] [Indexed: 10/27/2022]
Abstract
The rapidly increasing amount of experimental biological data enables the development of large and complex, often genome-scale models of molecular systems. The simulation and analysis of these computer models of metabolism, signal transduction, and gene regulation are standard applications in systems biology, but size and complexity of the networks limit the feasibility of many methods. Reduction of networks provides a hierarchical view of complex networks and gives insight knowledge into their coarse-grained structural properties. Although network reduction has been extensively studied in computer science, adaptation and exploration of these concepts are still lacking for the analysis of biochemical reaction systems. Using the Petri net formalism, we describe two local network structures, common transition pairs and minimal transition invariants. We apply these two structural elements for network reduction. The reduction preserves the CTI-property (covered by transition invariants), which is an important feature for completeness of biological models. We demonstrate this concept for a selection of metabolic networks including a benchmark network of Saccharomyces cerevisiae whose straightforward treatment is not yet feasible even on modern supercomputers.
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Rotter T, Uffmann D, Ackermann J, Aderhold J, Stemmer J, Graul J. Current Controlled Photoelectrochemical Etching of Gan Leaving Smooth Surfaces. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-482-1003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractWe have etched GaN grown by plasma source MBE in aqueous solutions of KOH in an electrochemical cell under HeCd laser illumination and additional current control.The etch rate was dramatically enhanced up to 8 μm/h by an applied current density of 6.4 mAcm-2. Photocurrent control leads to etched GaN surfaces exhibiting mirror-like appearance with uniform interference color. According to mechanical profilometry, they have a roughness of less than 3.5 nm after etching of several hundred nanometers, which is comparable to the roughness prior to etching. This etching process allows in situ control via photocurrent and induced yellow luminescence.
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Ackermann J. „Outside-the-Box Innovations”︁ - Das Projekthauskonzept von Evonik Industries. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200950038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kees M, Dimou G, Sillaber C, Drach J, Ackermann J, Lechner K, Gisslinger H. Low Dose Thalidomide in Patients with Relapsed or Refractory Multiple Myeloma. Leuk Lymphoma 2009; 44:1943-6. [PMID: 14738147 DOI: 10.1080/1042819031000123492] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Remarkable results of the treatment of refractory multiple myeloma with thalidomide have been reported. In most preceding studies, the given thalidomide dose was escalated to a maximum tolerated dose of up to 800 mg/d. The frequency of adverse effects correlates with dose intensity. Since a significant gain of therapeutic effects could not be observed as thalidomide dosage was escalated, the optimal dose of thalidomide remains to be determined. We report the results of a study with low dose thalidomide (median administered dose 100 mg/d, range 50-400 mg/d). Twenty-four relapsed (n = 19) or resistant (n = 5) multiple myeloma patients were included in the study. Twelve patients (50%) received thalidomide as monotherapy, 8 patients (33%) received a combination of thalidomide and dexamethasone (every 4 weeks 40 mg/day for 4 days) and 4 patients (17%) who were resistant to vincristine, doxorubicin, dexamethasone (VAD) received VAD combined with thalidomide. Overall, a response was observed in 12 patients (50%). Of the 12 patients treated with low dose thalidomide alone 5 (42%) responded, of the 8 patients who received a combination of thalidomide and dexamethasone 5 (63%) responded and of the 4 patients who had thalidomide in addition to VAD 2 patients (50%) responded. In 3 patients, thalidomide treatment had to be discontinued because of side effects and 1 patient died before response could be assessed. We conclude that low dose thalidomide is an effective and safe rescue therapy in relapsing or refractory multiple myeloma. Response to thalidomide might be dependent on prognostic parameters and tumor burden. To answer these questions larger prospective studies are necessary.
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Ackermann J, Vetterlein D, Tanneberg H, Neue HU, Mattusch J, Jahn R. Speciation of Arsenic under Dynamic Conditions. Eng Life Sci 2008. [DOI: 10.1002/elsc.200800012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kaufmann H, Ackermann J, Odelga V, Sagaster V, Nösslinger T, Pfeilstöcker M, Keck A, Ludwig H, Gisslinger H, Drach J. Cytogenetic patterns in multiple myeloma after a phase of preceding MGUS. Eur J Clin Invest 2008; 38:53-60. [PMID: 18173551 DOI: 10.1111/j.1365-2362.2007.01903.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Presenting the same histological diagnosis, multiple myeloma (MM) shows a large genomic variety, resulting in variable times of overall survival. MATERIALS AND METHODS To investigate major cytogenetic categories (any 14q-translocation, t(11;14), t(4;14), 13q-deletions, 17p-deletions) and their clinical consequences in MM after a pre-existing monoclonal gammopathy (MM post-MGUS), we performed a comparative analysis of 41 patients with MM post-MGUS and 287 patients with unknown prior history MM (U-MM). RESULTS In MM post-MGUS, a t(11;14) was found to be more frequent than in U-MM (24% vs. 14%) and it was associated with significantly shortened survival (24 months vs. 70 months in U-MM; P = 0.01). MM post-MGUS was further characterized by a higher frequency of 13q-deletions only (absence of all other specific abnormalities; 28% vs. 12% in U-MM; P = 0.02). A 13q-deletion only was an indicator of long survival in MM post-MGUS (median not yet reached) as opposed to U-MM (median survival, 29 months; P = 0.001). 17p-deletions were infrequent in MM post-MGUS (3% vs. 16% in U-MM; P = 0.04). Survival times for patients with t(4;14) and/or 17p-deletions and other abnormalities were similar in both MM patient cohorts. CONCLUSIONS Our data suggest that t(11;14) and 13q-deletions have distinct prognostic implications in the context of MM post-MGUS.
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Yoshimoto N, Aosawa K, Taniswa T, Omote K, Ackermann J, Videlot-Ackermann C, Brisset H, Fages F. Characterization of in-plane structures of vapor deposited thin-films of distyryl-oligothiophenes by grazing incidence x-ray diffractometry. CRYSTAL RESEARCH AND TECHNOLOGY 2007. [DOI: 10.1002/crat.200711010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sagaster V, Kaufmann H, Odelga V, Ackermann J, Gisslinger H, Rabitsch W, Zojer N, Ludwig H, Nösslinger T, Zielinski C, Drach J. Chromosomal abnormalities of young multiple myeloma patients (<45 yr) are not different from those of other age groups and are independent of stage according to the International Staging System. Eur J Haematol 2007; 78:227-34. [PMID: 17253972 DOI: 10.1111/j.1600-0609.2006.00807.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Little is known about tumor-related prognostic factors, in particular specific chromosomal abnormalities, in young patients with multiple myeloma (MM). We therefore investigated the chromosomal pattern by interphase fluorescence in situ hybridization (chromosomes 13q14, 14q32-translocations, chromosomes associated with hyperdiploidy) in 38 young patients with MM (age <45 yr) and compared the results with those observed in 69 patients with intermediate age (45-70 yr) and 64 elderly patients (age >70 yr). All chromosomal patterns were not significantly different between the three age cohorts. Similarly, standard MM parameters were equally distributed between these MM patient populations. However, survival by the International Staging System (ISS) for MM revealed marked differences between stage I/II (median survival not yet reached) and stage III (23.4 months; P < 0.0003) among young MM patients. A significant survival difference between ISS-stage I/II and ISS-stage III patients was also noted in the intermediate age group (median 65.4 months vs. 24.6 months; P = 0.0009). However, this difference disappeared among elderly MM patients (39.6 months in ISS-stage I/II vs. 32 months in ISS-stage III patients; P = 0.94), but it was unrelated to the cytogenetic pattern. Our results indicate that MM in young patients does not represent a distinct biologic entity, and that short survival of younger MM patients at ISS-stage III is independent of the molecular cytogenetic pattern.
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Sagaster V, Ludwig H, Kaufmann H, Odelga V, Zojer N, Ackermann J, Küenburg E, Wieser R, Zielinski C, Drach J. Bortezomib in relapsed multiple myeloma: response rates and duration of response are independent of a chromosome 13q-deletion. Leukemia 2006; 21:164-8. [PMID: 17096015 DOI: 10.1038/sj.leu.2404459] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Studies of bortezomib in patients with relapsed multiple myeloma (MM) suggested that bortezomib may be active even in the presence of adverse prognostic factors. We therefore evaluated 62 patients with relapsed/refractory MM who were treated with single-agent bortezomib, and addressed the question whether or not the negative prognostic impact of unfavorable cytogenetic abnormalities may be overcome by bortezomib. By interphase fluorescence in situ hybridization (FISH), a deletion of chromosome 13q14 [del(13q14)] was present in 33 patients (53%). Overall response rates to bortezomib were similar in patients with and without del(13q14) (45 versus 55%; P=0.66), and rates of complete remission (CR) near CR were also not different between the two patient populations (18 versus 14%). Three patients had a t(4;14)(p16;q32) in addition to del(13q14), and all of them had a >50% paraprotein reduction. Median duration of response was 12.3 months in patients with del(13q14) compared with 9.3 months in patients with normal 13q-status (P=0.25), and survival was also not different between the two patient populations. Patients not benefiting from single-agent bortezomib were characterized by the combined presence of a del(13q14) and low serum albumin (median survival 4.6 months). Our results provide evidence for remarkable activity of bortezomib in MM with del(13q14). Patients who do not respond to bortezomib and consecutively have short time to treatment failure and overall survival can be identified by low serum albumin in addition to del(13q14) and should be considered for bortezomib combinations.
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Bellini B, Ackermann J, Klein H, Dumas P, Safarov V. Light-induced random-walk motion in azo-polymers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2005. [DOI: 10.1016/j.msec.2005.06.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kaufmann H, Ackermann J, Baldia C, Nösslinger T, Wieser R, Seidl S, Sagaster V, Gisslinger H, Jäger U, Pfeilstöcker M, Zielinski C, Drach J. Both IGH translocations and chromosome 13q deletions are early events in monoclonal gammopathy of undetermined significance and do not evolve during transition to multiple myeloma. Leukemia 2004; 18:1879-82. [PMID: 15385925 DOI: 10.1038/sj.leu.2403518] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Molecular and genetic events associated with the transition from monoclonal gammopathy of undetermined significance (MGUS) to multiple myeloma (MM) are still poorly characterized. We investigated serial bone marrow specimens from 11 patients with MGUS who eventually progressed to MM (MM post-MGUS) by interphase fluorescence in situ hybridization for immunoglobulin heavy-chain gene (IgH) translocations and chromosome 13q deletions (del(13q)). In nine patients, IgH translocations were present both in MGUS and MM post-MGUS plasma cells, including three t(11;14)(q13;q32) and one t(4;14)(p16;q32), which was observed already 92 months prior to MM. Similarly, all five MM patients with del(13q) had this aberration already at the MGUS stage. Two patients without IgH translocation and del(13q) had chromosomal gains suggesting hyperdiploidy, but IgH translocations and/or del(13q) did not emerge at MM post-MGUS. IgH translocations and del(13q) are early genetic events in monoclonal gammopathies, suggesting that additional events are required for the transition from stable MGUS to progressive MM.
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Simonitsch-Klupp I, Hauser I, Ott G, Drach J, Ackermann J, Kaufmann J, Weltermann A, Greinix HT, Skrabs C, Dittrich C, Lutz D, Pötter R, Mannhalter C, Lechner K, Chott A, Jaeger U. Diffuse large B-cell lymphomas with plasmablastic/plasmacytoid features are associated with TP53 deletions and poor clinical outcome. Leukemia 2004; 18:146-55. [PMID: 14603341 DOI: 10.1038/sj.leu.2403206] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
To define reproducible criteria for subgroups of diffuse large B-cell lymphomas (DLBCL), including lymphomas with plasmablastic/plasmacytoid features (PB/PC-Fs), we investigated 66 DLBCL; the samples were categorized as either centroblastic (CB), immunoblastic (IB) or PB/PC-F applying standardized morphologic criteria. Blinded specimens were reviewed by three independent pathologists. The final consensus classification included 44 CB (67%), seven IB (10%) and 15 PB/PC-F (23%). The interobserver agreement between two centers (Vienna, Würzburg) was 93.5%. Most PB/PC-F were CD20+, cIgM+, MUM-1+, CD138+/-, bcl-6-, corresponding to an activated B-cell phenotype. Immunoglobulin-V(H) gene mutation analysis was consistent with a germinal or postgerminal center-cell origin. By fluorescence in situ hybridization analysis, 11/13 (85%) PB/PC-F had a monoallelic TP53 deletion. The pretreatment characteristics of patients with PB/PC-F included a tendency for more B symptoms, extranodal disease and a higher IPI. Importantly, PB/PC-F were resistant to standard chemotherapy (complete remission rate 47%, relapse rate 71%) and even autologous stem-cell transplantation. The median overall survival (OS) (14 months, P<0.002) and disease-free survival (6 months, P=0.02) were significantly shorter compared to patients with CB and IB. The OS difference was pronounced within the low and low-intermediate IPI risk group (P<0.001). Our data indicate a strong association of plasmablastic/plasmacytoid morphology with TP53 deletions, poor response to chemotherapy and short survival.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Antigens, Neoplasm/analysis
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Biomarkers/analysis
- Female
- Follow-Up Studies
- Genes, Immunoglobulin
- Genes, p53/genetics
- Germinal Center/immunology
- Herpesvirus 4, Human/genetics
- Humans
- Immunophenotyping
- In Situ Hybridization, Fluorescence
- Lymphoma, B-Cell/classification
- Lymphoma, B-Cell/mortality
- Lymphoma, B-Cell/pathology
- Lymphoma, Large B-Cell, Diffuse/classification
- Lymphoma, Large B-Cell, Diffuse/mortality
- Lymphoma, Large B-Cell, Diffuse/pathology
- Lymphoma, Large-Cell, Immunoblastic/classification
- Lymphoma, Large-Cell, Immunoblastic/mortality
- Lymphoma, Large-Cell, Immunoblastic/pathology
- Male
- Middle Aged
- Plasma Cells/pathology
- Prognosis
- RNA, Viral/genetics
- Sequence Deletion
- Survival Rate
- Treatment Outcome
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Maurer CA, Stamenic I, Stouthandel R, Ackermann J, Gonzenbach HR. Single hemicerclage for lateral type B malleolar fracture--a novel, minimal and reliable osteosynthesis. ACTA ACUST UNITED AC 2004; 9:283-8. [PMID: 14725097 DOI: 10.1024/1023-9332.9.6.283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AIM OF STUDY To investigate the short- and long-term outcome of patients with isolated lateral malleolar fracture type B treated with a single hemicerclage out of metallic wire or PDS cord. METHODS Over an 8-year period 97 patients were treated with a single hemicerclage for lateral malleolar fracture type B and 89 were amenable to a follow-up after mean 39 months, including interview, clinical examination and X-ray controls. RESULTS The median operation time was 35 minutes (range 15-85 min). X-ray controls within the first two postoperative days revealed an anatomical restoration of the upper ankle joint in all but one patient. The complication rate was 8%: hematoma (2 patients), wound infection (2), Sudeck's dystrophy (2) and deep vein thrombosis (1). Full weight-bearing was tolerated at median 6.0 weeks (range 2-26 weeks). No secondary displacement, delayed union or consecutive arthrosis of the upper ankle joint was observed. All but one patient had restored symmetric joint mobility. Ninety-seven percent of patients were satisfied or very satisfied with the outcome. Following bone healing, hemicerclage removal was necessary in 19% of osteosyntheses with metallic wire and in none with PDS cord. CONCLUSION The single hemicerclage is a novel, simple and reliable osteosynthesis technique for isolated lateral type B malleolar fractures and may be considered as an alternative to the osteosynthesis procedures currently in use.
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