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42 Publications visible to you, out of a total of 42
A functional polymorphism in the NAD(P)H oxidase subunit CYBA is related to gene expression, enzyme activity, and outcome in non-Hodgkin lymphoma.
GLA - German Lymphoma Alliance

Abstract (Expand)

NAD(P)H oxidase is a major endogenous source of reactive oxygen species (ROS). ROS may not only be involved in carcinogenesis but also in efficacy of chemotherapeutic agents like doxorubicin. By a … comprehensive genotyping approach covering 48 genetic polymorphisms (single-nucleotide polymorphisms) in five subunits of phagocytic NAD(P)H oxidase, we asked whether they affect gene expression, enzymatic activity, and outcome of CHO(E)P chemotherapy. A highly consistent effect was observed for the CYBA 640A>G variant. In peripheral blood granulocytes of 125 healthy volunteers, the G allele of 640A>G was associated with lower NAD(P)H oxidase activity (P = 0.006). Moreover, the G allele was associated with lower mRNA and protein expression (both P = 0.02). Of clinical importance, the outcome of patients suffering from non-Hodgkin lymphoma and treated with CHO(E)P regimen was dependent on the CYBA 640A>G polymorphism. In an exploratory study (n = 401), carriers of 640GG had an event-free survival (EFS) risk ratio of 1.95 [95% confidence interval (95% CI), 1.31-2.90; P = 0.001] compared with 640AA. In a confirmatory set (n = 477), the risk ratios were 1.53 (1.04-2.25, P = 0.03). The complete set of 878 patients showed a relative risk of 1.72 (1.30-2.26) and 1.59 (1.14-2.21) for EFS and overall survival, respectively. Further molecular-biological experiments showed lower expression and reduced stability of transcripts with the G allele in lymphoblastoid cell lines. Transfection of allele-specific plasmids into HEK293 cells elicited lower activity for the G allele in a luciferase reporter gene construct. Thus, CYBA 640A>G was shown to be a functional polymorphism with possible consequences for patients receiving CHO(E)P chemotherapy and might have further implications for other ROS-mediated modalities.

Authors: M. Hoffmann, M. A. Schirmer, M. V. Tzvetkov, M. Kreuz, M. Ziepert, L. Wojnowski, D. Kube, M. Pfreundschuh, L. Trumper, M. Loeffler, J. Brockmoller

Date Published: 15th Mar 2010

Publication Type: Not specified

Human Diseases: non-Hodgkin lymphoma

Age and cellular composition influence overall survival in a collective of non-immunocompromised patients with EBV-positive diffuse large B-cell lymphoma from a German lymphoma center.
GLA - German Lymphoma Alliance

Abstract (Expand)

We investigated 41 diffuse large B-cell lymphomas (DLBCL) diagnosed at one center harboring >/=50% of latently Epstein-Barr virus (EBV)-infected neoplastic cells occurring in 34 patients aged >/=50 … years and in 7 patients younger than 50 years in the absence of any known immunodeficiency for the expression patterns of EBV latent and immediate-early proteins, for the differentiation stage of the neoplastic cells, the presence of cytogenetic alterations and a possible co-infection with the human herpes virus (HHV)-8. Here, we show that EBV-positive DLBCLs rarely arise from naive and more frequently from post-germinal center B-cells that often contain crippling immunoglobulin gene mutations. Most of the lymphomas did not exhibit breaks in the BCL2, BCL6, and MYC genes and none of the cases investigated contained HHV-8 sequences. Patients aged <50 years performed better than older ones while in patients aged >/=50 years only the cellular composition had an impact on overall survival.

Authors: K. Johrens, R. U. Trappe, D. Lenze, M. Pfreundschuh, M. Ziepert, M. Hummel, I. Anagnostopoulos

Date Published: 29th Apr 2016

Publication Type: Not specified

Human Diseases: diffuse large B-cell lymphoma

Alemtuzumab plus CHOP versus CHOP in elderly patients with peripheral T-cell lymphoma: the DSHNHL2006-1B/ACT-2 trial.
GLA - German Lymphoma Alliance

Abstract (Expand)

PTCL patients exhibit poor survival with existing treatments. We investigated the efficacy of CHOP combined with alemtuzumab in 116 PTCL patients age 61-80 in an open-label, randomized phase 3 trial. … Alemtuzumab was given on day 1, to a total of 360 mg in 21 patients, or 120 mg in 37. Hematotoxicity was increased with A-CHOP resulting in more grade >/=3 infections (40% versus 21%) and 4 versus 1 death due to infections, respectively. CR/CRu rate was 60% for A-CHOP and 43% for CHOP, and OR rate was 72% and 66%, respectively. Three-year-EFS, PFS and OS were 27% [15%-39%], 28% [15%-40%], and 37% ([23%-50%] for A-CHOP, and 24% [12%-35%], 29% [17%-41%], and 56% [44%-69%] for CHOP, respectively, showing no significant differences. Multivariate analyses, adjusted for strata and sex confirmed these results (hazard ratio HREFS: 0.7 ([95% CI: 0.5-1.1]; p = 0.094), HRPFS: 0.8 ([95% CI: 0.5-1.2]; p = 0.271), HROS: 1.4 ([95% CI: 0.9-2.4]; p = 0.154). The IPI score was validated, and male sex (HREFS 2.5) and bulky disease (HREFS 2.2) were significant risk factors for EFS, PFS, and OS. Alemtuzumab added to CHOP increased response rates, but did not improve survival due to treatment-related toxicity.

Authors: G. G. Wulf, B. Altmann, M. Ziepert, F. D'Amore, G. Held, R. Greil, O. Tournilhac, T. Relander, A. Viardot, M. Wilhelm, C. Wilhelm, A. Pezzutto, J. M. Zijlstra, E. V. D. Neste, P. J. Lugtenburg, J. K. Doorduijn, M. V. Gelder, G. W. van Imhoff, F. Zettl, F. Braulke, M. Nickelsen, B. Glass, A. Rosenwald, P. Gaulard, M. Loeffler, M. Pfreundschuh, N. Schmitz, L. Trumper

Date Published: 10th May 2020

Publication Type: Journal article

Human Diseases: lymphoma, peripheral T-cell lymphoma

Association of NADPH oxidase polymorphisms with anthracycline-induced cardiotoxicity in the RICOVER-60 trial of patients with aggressive CD20(+) B-cell lymphoma.
GLA - German Lymphoma Alliance

Abstract (Expand)

AIM: To identify gene variants responsible for anthracycline-induced cardiotoxicity. PATIENTS & METHODS: Polymorphisms of the NADPH oxidase subunits and of the anthracycline transporters ABCC1, … ABCC2 and SLC28A3 were genotyped in elderly patients (61-80 years) treated for aggressive CD20(+) B-cell lymphomas with CHOP-14 with or without rituximab and followed up for 3 years. RESULTS: The accumulation of RAC2 subunit genotypes TA/AA among cases was statistically significant upon adjustment for gender, age and doxorubicin dose in a multivariate logistic regression analysis (OR: 2.3, p = 0.028; univariate: OR: 1.8, p = 0.077). RAC2 and CYBA genotypes were significantly associated with anthracycline-induced cardiotoxicity in a meta-analysis of this and a similar previous study. CONCLUSION: Our results support the theory that NADPH oxidase is involved in anthracycline-induced cardiotoxicity. Original submitted 9 July 2014; Revision submitted 19 December 2014.

Authors: A. Reichwagen, M. Ziepert, M. Kreuz, U. Godtel-Armbrust, T. Rixecker, V. Poeschel, M. Reza Toliat, P. Nurnberg, M. Tzvetkov, S. Deng, L. Trumper, G. Hasenfuss, M. Pfreundschuh, L. Wojnowski

Date Published: 1st Apr 2015

Publication Type: Not specified

Human Diseases: B-cell lymphoma

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