7 results on '"Albers-Leischner, C."'
Search Results
2. Treatment outcome of atypical EGFR mutations in the German National Network Genomic Medicine Lung Cancer (nNGM)
- Author
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Janning, M., primary, Süptitz, J., additional, Albers-Leischner, C., additional, Delpy, P., additional, Tufman, A., additional, Velthaus-Rusik, J.-L., additional, Reck, M., additional, Jung, A., additional, Kauffmann-Guerrero, D., additional, Bonzheim, I., additional, Brändlein, S., additional, Hummel, H.-D., additional, Wiesweg, M., additional, Schildhaus, H.-U., additional, Stratmann, J.A., additional, Sebastian, M., additional, Alt, J., additional, Buth, J., additional, Esposito, I., additional, Berger, J., additional, Tögel, L., additional, Saalfeld, F.C., additional, Wermke, M., additional, Merkelbach-Bruse, S., additional, Hillmer, A.M., additional, Klauschen, F., additional, Bokemeyer, C., additional, Buettner, R., additional, Wolf, J., additional, Loges, S., additional, Simon, Ronald, additional, Sauter, Guido, additional, Volk, Alexander, additional, Neumann, Jens, additional, Klauschen, Frederick, additional, Weichert, Wilko, additional, Kalhori, Naser, additional, Lüthen, Reinhard, additional, Stöhr, Robert, additional, Schubart, Chistoph, additional, Wacker, Heidemarie, additional, Fuchs, Florian, additional, Hartmann, Nils, additional, Graf, Stefanie, additional, Brandts, Christian, additional, Wild, Peter, additional, Demes, Melanie, additional, Reis, Henning, additional, and Rohde, Gernot, additional
- Published
- 2022
- Full Text
- View/download PDF
3. Treatment outcome of atypical EGFR mutations in the German National Network Genomic Medicine Lung Cancer (nNuM)
- Author
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Janning, M., Sueptitz, J., Albers-Leischner, C., Delpy, P., Tufman, A., Velthaus-Rusik, J-L, Reck, M., Jung, A., Kauffmann-Guerrero, D., Bonzheim, I, Braendlein, S., Hummel, H-D, Wiesweg, M., Schildhaus, H-U, Stratmann, J. A., Sebastian, M., Alt, J., Buth, J., Esposito, I, Berger, J., Toegel, L., Saalfeld, F. C., Wermke, M., Merkelbach-Bruse, S., Hillmer, A. M., Klauschen, F., Bokemeyer, C., Buettner, R., Wolf, J., Loges, S., Janning, M., Sueptitz, J., Albers-Leischner, C., Delpy, P., Tufman, A., Velthaus-Rusik, J-L, Reck, M., Jung, A., Kauffmann-Guerrero, D., Bonzheim, I, Braendlein, S., Hummel, H-D, Wiesweg, M., Schildhaus, H-U, Stratmann, J. A., Sebastian, M., Alt, J., Buth, J., Esposito, I, Berger, J., Toegel, L., Saalfeld, F. C., Wermke, M., Merkelbach-Bruse, S., Hillmer, A. M., Klauschen, F., Bokemeyer, C., Buettner, R., Wolf, J., and Loges, S.
- Abstract
Background: Atypical EGFR mutations occur in 10%-30% of non-small-cell lung cancer (NSCLC) patients with EGFR mutations and their sensitivity to classical epidermal growth factor receptor (EGFR)-tyrosine kinase inhibitors (TKI) is highly heterogeneous. Patients harboring one group of uncommon, recurrent EGFR mutations (G719X, 57681, L861Q) respond to EGFR-TKI. Exon 20 insertions are mostly insensitive to EGFR-TKI but display sensitivity to exon 20 inhibitors. Clinical outcome data of patients with very rare point and compound mutations upon systemic treatments are still sparse to date. Patients and methods: In this retrospective, multicenter study of the national Network Genomic Medicine (nNGM) in Germany, 856 NSCLC cases with atypical EGFR mutations including co-occurring mutations were reported from 12 centers. Clinical follow-up data after treatment with different EGFR-TKIs, chemotherapy and immune checkpoint inhibitors were available from 260 patients. Response to treatment was analyzed in three major groups: (i) uncommon mutations (G719X, 57681, L861Q and combinations), (ii) exon 20 insertions and (iii) very rare EGFR mutations (very rare single point mutations, compound mutations, exon 18 deletions, exon 19 insertions). Results: Our study comprises the largest thus far reported real-world cohort of very rare EGFR single point and compound mutations treated with different systemic treatments. We validated higher efficacy of EGFR-TKI in comparison to chemotherapy in group 1 (uncommon), while most exon 20 insertions (group 2) were not EGFR-TKI responsive. In addition, we found TKI sensitivity of very rare point mutations (group 3) and of complex EGFR mutations containing exon 19 deletions or L858R mutations independent of the combination partner. Notably, treatment responses in group 3 (very rare) were highly heterogeneous. Co-occurring TP53 mutations exerted a non-significant trend for a detrimental effect on outcome in EGFR-TKI-treated patients in groups 2 and
- Published
- 2022
4. 1431P The nNGM Preclinical Platform: Preclinical research to generate evidence for patients with non-small cell lung cancer harboring variants of unknown significance
- Author
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Ziegler, M., Albers-Leischner, C., Salgueiro, L., Khoury, N., Sharapova, Y., Saalfeld, F.C., Wenzel, C., Scharpenseel, H., Schmidt, C., Naveja-Romero, J., Meemboor, S., Hillmer, A., Nogova, L., Wermke, M., Wolf, J., Diederichs, S., Brummer, T., Büttner, R., Janning, M., and Loges, S.
- Published
- 2023
- Full Text
- View/download PDF
5. Mobocertinib in Patients with EGFR Exon 20 Insertion-Positive Non-Small Cell Lung Cancer (MOON): An International Real-World Safety and Efficacy Analysis.
- Author
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Illini O, Saalfeld FC, Christopoulos P, Duruisseaux M, Vikström A, Peled N, Demedts I, Dudnik E, Eisert A, Hashemi SMS, Janzic U, Kian W, Mohorcic K, Mohammed S, Silvoniemi M, Rothschild SI, Schulz C, Wesseler C, Addeo A, Armster K, Itchins M, Ivanović M, Kauffmann-Guerrero D, Koivunen J, Kuon J, Pavlakis N, Piet B, Sebastian M, Velthaus-Rusik JL, Wannesson L, Wiesweg M, Wurm R, Albers-Leischner C, Aust DE, Janning M, Fabikan H, Herold S, Klimova A, Loges S, Sharapova Y, Schütz M, Weinlinger C, Valipour A, Overbeck TR, Griesinger F, Jakopovic M, Hochmair MJ, and Wermke M
- Subjects
- Male, Humans, Female, Aged, ErbB Receptors genetics, Exons, Carcinoma, Non-Small-Cell Lung drug therapy, Carcinoma, Non-Small-Cell Lung genetics, Lung Neoplasms drug therapy, Lung Neoplasms genetics, Aniline Compounds, Indoles, Pyrimidines
- Abstract
EGFR exon 20 (EGFR Ex20) insertion mutations in non-small cell lung cancer (NSCLC) are insensitive to traditional EGFR tyrosine kinase inhibitors (TKIs). Mobocertinib is the only approved TKI specifically designed to target EGFR Ex20. We performed an international, real-world safety and efficacy analysis on patients with EGFR Ex20-positive NSCLC enrolled in a mobocertinib early access program. We explored the mechanisms of resistance by analyzing postprogression biopsies, as well as cross-resistance to amivantamab. Data from 86 patients with a median age of 67 years and a median of two prior lines of treatment were analyzed. Treatment-related adverse events (TRAEs) occurred in 95% of patients. Grade ≥3 TRAEs were reported in 38% of patients and included diarrhea (22%) and rash (8%). In 17% of patients, therapy was permanently discontinued, and two patients died due to TRAEs. Women were seven times more likely to discontinue treatment than men. In the overall cohort, the objective response rate to mobocertinib was 34% (95% CI, 24-45). The response rate in treatment-naïve patients was 27% (95% CI, 8-58). The median progression-free and overall survival was 5 months (95% CI, 3.5-6.5) and 12 months (95% CI, 6.8-17.2), respectively. The intracranial response rate was limited (13%), and one-third of disease progression cases involved the brain. Mobocertinib also showed antitumor activity following EGFR Ex20-specific therapy and vice versa. Potential mechanisms of resistance to mobocertinib included amplifications in MET, PIK3CA, and NRAS. Mobocertinib demonstrated meaningful efficacy in a real-world setting but was associated with considerable gastrointestinal and cutaneous toxicity.
- Published
- 2024
- Full Text
- View/download PDF
6. A newly identified 45-kDa JAK2 variant with an altered kinase domain structure represents a novel mode of JAK2 kinase inhibitor resistance.
- Author
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Gorantla SP, Mueller TA, Albers-Leischner C, Rudelius M, von Bubnoff N, and Duyster J
- Subjects
- Animals, Humans, Mice, Janus Kinase 2 metabolism, Janus Kinases metabolism, Nitriles pharmacology, Protein Kinase Inhibitors pharmacology, Pyrazoles pharmacology, Pyrimidines pharmacology, Antineoplastic Agents, STAT5 Transcription Factor genetics, STAT5 Transcription Factor metabolism
- Abstract
Tyrosine-protein kinase (janus kinase; JAK)-signal transducer and activator of transcription (STAT) signaling plays a pivotal role in the development of myeloproliferative neoplasms (MPNs). Treatment with the potent JAK1/JAK2-specific inhibitor, ruxolitinib, significantly reduces tumor burden; however, ruxolitinib treatment does not fully eradicate the malignant clone. As the molecular basis for the disease persistence is not well understood, we set out to gain new insights by generating ruxolitinib-resistant cell lines. Surprisingly, these cells harbor a 45 kDa JAK2 variant (FERM-JAK2) consisting of the N-terminal FERM domain directly fused to the C-terminal kinase domain in 80% of sublines resistant to ruxolitinib. At the molecular level, FERM-JAK2 is able to directly bind and activate STAT5 in the absence of cytokine receptors. Furthermore, phosphorylation of activation-loop tyrosines is dispensable for FERM-JAK2-mediated STAT5 activation and cellular transformation, in contrast to JAK2-V617F. As a result, FERM-JAK2 is highly resistant to several ATP-competitive JAK2 inhibitors, whereas it is particularly sensitive to HSP90 inhibition. A murine model of FERM-JAK2 leukemogenesis showed an accelerated MPN phenotype with pronounced splenomegaly. Notably, most current protocols for the monitoring of emerging JAK variants are unable to detect FERM-JAK2, highlighting the urgent need for implementing next-generation sequencing approaches in MPN patients receiving ruxolitinib., (© 2023 The Authors. Molecular Oncology published by John Wiley & Sons Ltd on behalf of Federation of European Biochemical Societies.)
- Published
- 2024
- Full Text
- View/download PDF
7. NIPA (Nuclear Interaction Partner of ALK) Is Crucial for Effective NPM-ALK Mediated Lymphomagenesis.
- Author
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Kreutmair S, Lippert LJ, Klingeberg C, Albers-Leischner C, Yacob S, Shlyakhto V, Mueller T, Mueller-Rudorf A, Yu C, Gorantla SP, Miething C, Duyster J, and Illert AL
- Abstract
The NPM-ALK fusion kinase is expressed in 60% of systemic anaplastic large-cell lymphomas (ALCL). A Nuclear Interaction Partner of ALK (NIPA) was identified as a binding partner of NPM-ALK. To identify the precise role of NIPA for NPM-ALK-driven lymphomagenesis, we investigated various NPM-ALK
+ cell lines and mouse models. Nipa deletion in primary mouse embryonic fibroblasts resulted in reduced transformation ability and colony formation upon NPM-ALK expression. Downregulating NIPA in murine NPM-ALK+ Ba/F3 and human ALCL cells decreased their proliferation ability and demonstrated synergistic effects of ALK inhibition and NIPA knockdown. Comprehensive in vivo analyses using short- and long-latency transplantation mouse models with NPM-ALK+ bone marrow (BM) revealed that Nipa deletion inhibited NPM-ALK-induced tumorigenesis with prolonged survival and reduced spleen colonies. To avoid off-target effects, we combined Nipa deletion and NPM-ALK expression exclusively in T cells using a lineage-restricted murine ALCL-like model resembling human disease: control mice died from neoplastic T-cell infiltration, whereas mice transplanted with Lck-CreTG/wt Nipaflox/flox NPM-ALK+ BM showed significantly prolonged survival. Immunophenotypic analyses indicated a characteristic ALCL-like phenotype in all recipients but revealed fewer "stem-cell-like" features of Nipa- deficient lymphomas compared to controls. Our results identify NIPA as a crucial player in effective NPM-ALK-driven ALCL-like disease in clinically relevant murine and cell-based models., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Kreutmair, Lippert, Klingeberg, Albers-Leischner, Yacob, Shlyakhto, Mueller, Mueller-Rudorf, Yu, Gorantla, Miething, Duyster and Illert.)- Published
- 2022
- Full Text
- View/download PDF
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