1
|
Sebastian M, Reck M, Fischer R, Christoph D, Bernhardt C, von der Heyde E, Nusch A, Ludwig P, Hipper A, Hanselmann J, Medinger T, Binninger A, Jänicke M, Christopoulos P, Elender C, Bethge A, Seese B, Gauler T, Waller C. 1542P First real-world outcome data of SCLC in Germany: Data from the Clinical Research platform Into molecular testing, treatment and outcome of (non-)Small cell lung carcinoma Patients (CRISP; AIO-TRK-0315). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1636] [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: 11/30/2022] Open
|
2
|
Griesinger F, Sebastian M, Bethge A, Christopoulos P, Hoffknecht P, Waller C, Benkelmann R, Jänicke M, Fleitz A, Hanselmann J, Hipper A, Groth A, Weichert W, Nusch A, Rauh J, Fietz T, Illmer T, Depenbusch R, Eberhardt W, Thomas M. 49P EGFR exon 20 insertion mutations in patients with locally advanced or metastatic NSCLC in the German prospective, CRISP Registry real-world cohort (AIO-TRK-0315). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.02.058] [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: 11/01/2022] Open
|
3
|
Schreiter K, Schneider S, Raila I, Kellner N, Bethge A, Lindner M, Ruf B, Böhme J, Grünewald T. Frequency of multi-drug resistant (MDR) pathogens in patients with osteoarticular infections. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3780] [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: 10/28/2022] Open
|
4
|
Frenzel T, Hoffmann B, Schmitz R, Bethge A, Schumacher U, Wedemann G. Radiotherapy and chemotherapy change vessel tree geometry and metastatic spread in a small cell lung cancer xenograft mouse tumor model. PLoS One 2017; 12:e0187144. [PMID: 29107953 PMCID: PMC5673169 DOI: 10.1371/journal.pone.0187144] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 10/13/2017] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Tumor vasculature is critical for tumor growth, formation of distant metastases and efficiency of radio- and chemotherapy treatments. However, how the vasculature itself is affected during cancer treatment regarding to the metastatic behavior has not been thoroughly investigated. Therefore, the aim of this study was to analyze the influence of hypofractionated radiotherapy and cisplatin chemotherapy on vessel tree geometry and metastasis formation in a small cell lung cancer xenograft mouse tumor model to investigate the spread of malignant cells during different treatments modalities. METHODS The biological data gained during these experiments were fed into our previously developed computer model "Cancer and Treatment Simulation Tool" (CaTSiT) to model the growth of the primary tumor, its metastatic deposit and also the influence on different therapies. Furthermore, we performed quantitative histology analyses to verify our predictions in xenograft mouse tumor model. RESULTS According to the computer simulation the number of cells engrafting must vary considerably to explain the different weights of the primary tumor at the end of the experiment. Once a primary tumor is established, the fractal dimension of its vasculature correlates with the tumor size. Furthermore, the fractal dimension of the tumor vasculature changes during treatment, indicating that the therapy affects the blood vessels' geometry. We corroborated these findings with a quantitative histological analysis showing that the blood vessel density is depleted during radiotherapy and cisplatin chemotherapy. The CaTSiT computer model reveals that chemotherapy influences the tumor's therapeutic susceptibility and its metastatic spreading behavior. CONCLUSION Using a system biological approach in combination with xenograft models and computer simulations revealed that the usage of chemotherapy and radiation therapy determines the spreading behavior by changing the blood vessel geometry of the primary tumor.
Collapse
Affiliation(s)
- Thorsten Frenzel
- Center for Experimental Medicine, Department of Anatomy and Experimental Morphology, University Cancer Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- University Hospital Hamburg-Eppendorf, Ambulatory Center, Department for Radiation Oncology, Hamburg, Germany
| | - Bertin Hoffmann
- Competence Center Bioinformatics, Institute for Applied Computer Science, University of Applied Sciences Stralsund, Stralsund, Germany
| | - Rüdiger Schmitz
- Center for Experimental Medicine, Department of Anatomy and Experimental Morphology, University Cancer Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anja Bethge
- Competence Center Bioinformatics, Institute for Applied Computer Science, University of Applied Sciences Stralsund, Stralsund, Germany
| | - Udo Schumacher
- Center for Experimental Medicine, Department of Anatomy and Experimental Morphology, University Cancer Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gero Wedemann
- Competence Center Bioinformatics, Institute for Applied Computer Science, University of Applied Sciences Stralsund, Stralsund, Germany
| |
Collapse
|
5
|
Bethge A, Schumacher U, Wedemann G. Simulation of metastatic progression using a computer model including chemotherapy and radiation therapy. J Biomed Inform 2015; 57:74-87. [DOI: 10.1016/j.jbi.2015.07.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 07/01/2015] [Accepted: 07/12/2015] [Indexed: 11/15/2022]
|
6
|
Brodbeck T, Nehmann N, Bethge A, Wedemann G, Schumacher U. Perforin-dependent direct cytotoxicity in natural killer cells induces considerable knockdown of spontaneous lung metastases and computer modelling-proven tumor cell dormancy in a HT29 human colon cancer xenograft mouse model. Mol Cancer 2014; 13:244. [PMID: 25373310 PMCID: PMC4239380 DOI: 10.1186/1476-4598-13-244] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 10/27/2014] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND For long, natural killer (NK) cells have been suspected to play a critical role in suppressing the development of spontaneous metastases in cancer patients. Despite a wide range of studies it remains unclear so far to what extent primary tumor growth together with formation of distant metastases and NK cell activity influence each other. METHODS To precisely investigate the role of NK cells with a perforin-deficiency in cancer growth and metastasis formation, human HT29 colon cancer cells were subcutaneously grafted into pore forming protein and recombination activating gene 2 double knock out (pfp/rag2) mice and in recombination activating gene 2 only knock out (rag2) mice both with black six background. Both mice lack B and T cell functions due to the absence of rag2. RESULTS Primary tumors developed in 16/16 in pfp/rag2 and 20/20 rag2 mice. At sacrifice primary tumor weight did not differ significantly. However, tumors grew faster in pfp/rag2 mice (50 days) than in pfp/rag2 mice (70 days). Circulating tumor cells (CTC) in murine blood were nearly three times higher in pfp/rag2 (68 cells/ml) than in rag2 mice (24 cells/ml). Lung metastases occurred frequently in pfp/rag2 mice (13/16) and infrequently in rag2 mice (5/20). The mean number of metastases was 789 in pfp/rag2 mice compared to 210 in rag2 mice. Lung metastases in pfp/rag2 mice consisted of 10-100 tumor cells while those in rag2 mice were generally disseminated tumor cells (DTCs).Computer modelling showed that perforin-dependent killing of NK cells decelerates the growth of the primary tumour and kills 80% of CTCs. Furthermore, perforin-mediated cytotoxicity hampers the proliferation of the malignant cells in host tissue forcing them to stay dormant for at least 30 days. CONCLUSION The results exactly quantified the effect of perforin-dependent direct cytotoxicity of NK cells on HT29 on primary tumor growth, number of CTCs in the blood and the number of metastases. The largest effects were seen in the number of mice developing spontaneous lung metastases and the mean number of lung metastases. Hence, perforin-mediated cytotoxicity used for direct killing by NK cells is more important than indirect killing by secretion of death-inducing ligands by NK cells.
Collapse
Affiliation(s)
- Tobias Brodbeck
- />Experimental Morphology, Center for Experimental Medicine, University Medical Center Hamburg, Martinistrasse 52, 20246 Hamburg, Germany
| | - Nina Nehmann
- />Experimental Morphology, Center for Experimental Medicine, University Medical Center Hamburg, Martinistrasse 52, 20246 Hamburg, Germany
| | - Anja Bethge
- />Competence Center Bioinformatics, Institute for Applied Computer Science, University of Applied Sciences Stralsund, Zur Schwedenschanze 15, 18435 Stralsund, Germany
| | - Gero Wedemann
- />Competence Center Bioinformatics, Institute for Applied Computer Science, University of Applied Sciences Stralsund, Zur Schwedenschanze 15, 18435 Stralsund, Germany
| | - Udo Schumacher
- />Experimental Morphology, Center for Experimental Medicine, University Medical Center Hamburg, Martinistrasse 52, 20246 Hamburg, Germany
| |
Collapse
|
7
|
Wendler R, Lindner M, Bethge A, Grünewald T. Bacterial contamination of smartphones and tablets used by health care workers (HCW) in the hospital–preliminary results from a two-point observational study. Int J Infect Dis 2014. [DOI: 10.1016/j.ijid.2014.03.1263] [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: 10/25/2022] Open
|
8
|
Bethge A, Schumacher U, Wree A, Wedemann G. Are metastases from metastases clinical relevant? Computer modelling of cancer spread in a case of hepatocellular carcinoma. PLoS One 2012; 7:e35689. [PMID: 22539992 PMCID: PMC3335074 DOI: 10.1371/journal.pone.0035689] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 03/22/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Metastasis formation remains an enigmatic process and one of the main questions recently asked is whether metastases are able to generate further metastases. Different models have been proposed to answer this question; however, their clinical significance remains unclear. Therefore a computer model was developed that permits comparison of the different models quantitatively with clinical data and that additionally predicts the outcome of treatment interventions. METHODS The computer model is based on discrete events simulation approach. On the basis of a case from an untreated patient with hepatocellular carcinoma and its multiple metastases in the liver, it was evaluated whether metastases are able to metastasise and in particular if late disseminated tumour cells are still capable to form metastases. Additionally, the resection of the primary tumour was simulated. The simulation results were compared with clinical data. RESULTS The simulation results reveal that the number of metastases varies significantly between scenarios where metastases metastasise and scenarios where they do not. In contrast, the total tumour mass is nearly unaffected by the two different modes of metastasis formation. Furthermore, the results provide evidence that metastasis formation is an early event and that late disseminated tumour cells are still capable of forming metastases. Simulations also allow estimating how the resection of the primary tumour delays the patient's death. CONCLUSION The simulation results indicate that for this particular case of a hepatocellular carcinoma late metastases, i.e., metastases from metastases, are irrelevant in terms of total tumour mass. Hence metastases seeded from metastases are clinically irrelevant in our model system. Only the first metastases seeded from the primary tumour contribute significantly to the tumour burden and thus cause the patient's death.
Collapse
Affiliation(s)
- Anja Bethge
- Competence Center Bioinformatics, Institute for Applied Computer Science, University of Applied Sciences Stralsund, Stralsund, Germany
| | - Udo Schumacher
- Institute for Anatomy and Experimental Morphology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Andreas Wree
- Institute of Anatomy, University of Rostock, Rostock, Germany
| | - Gero Wedemann
- Competence Center Bioinformatics, Institute for Applied Computer Science, University of Applied Sciences Stralsund, Stralsund, Germany
| |
Collapse
|
9
|
Rodenbeck A, Ruppert N, Bethge A, Hüther G, Meier A, Jordan W, Cohrs S. Elevated evening cortisol secretion due to underlying psychiatric disorders independent of the sleep-related disease. Pharmacopsychiatry 2005. [DOI: 10.1055/s-2005-918818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
10
|
|