GLORIA

GEOMAR Library Ocean Research Information Access

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    In: International Journal of Cancer, Wiley, Vol. 146, No. 11 ( 2020-06), p. 3170-3183
    Abstract: What's new? More than half of all brain metastases show infiltrating rather than displacing growth at the macro‐metastasis/organ parenchyma interface (MMPI), a finding associated with shorter survival. LEF1 is an epithelial‐mesenchymal transition (EMT) transcription factor commonly overexpressed in brain‐colonizing breast cancer cells. Its role in infiltrative MMPIs remains unclear, however. This study identifies LEF1 as a critical regulator of glutathione metabolism aside from its EMT inducer role. LEF1 overexpression induces resistance against glutathione depletion and improves the antioxidative capacity of breast cancer cells. Increased glutathione fitness and reactive oxygen species resistance appear to be more relevant than EMT induction during brain colonization.
    Type of Medium: Online Resource
    ISSN: 0020-7136 , 1097-0215
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 218257-9
    detail.hit.zdb_id: 1474822-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    In: BMC Cancer, Springer Science and Business Media LLC, Vol. 20, No. 1 ( 2020-12)
    Abstract: Brain metastasis represents a major complication with a significantly shorter overall survival of many oncological diseases, in particular of lung cancer, breast cancer and malignant melanoma patients. However, despite the poor prognosis, sometimes clinical decision-making, between on the one hand not to harm the patient and on the other hand not withholding a potential therapeutic option, is very challenging. Thus the aim of this retrospective study was to compare various scores, including scores for activities of daily living (ADL) before resection of brain metastases and to analyse their impact on survival. Methods Our single institution retrospective patient cohort ( N  = 100) with a median age of 63.6 years, which had all undergone resection of one or more brain metastases, was categorized using the original patient files. The cohort includes 52 patients with lung cancer, 27 patients with breast cancer, 8 patients with colorectal carcinoma and 13 patients with kidney cancer. To categorize, we used different score systems which were capable to evaluate the patient in relation to self-sufficiency, activity and self-determination as part of ADL. The retrospective analysis includes the ECOG-Status, Karnofsky-Index, Barthel-Index, ASA-Classification and Katz-Index. Pre-processing and the analysis of the data was implemented using KNIME, where we used the R-plugin nodes to perform the final statistical tests with R. Results Our analysis reveals that most of the ADL scores we tested are able to give a reliable prediction on overall survival after brain metastasis surgery. The survival rates decrease significantly with a lower score in all tested score systems, with the exception of the ASA-Risk score. In particular, the Katz Index 〈  6 was identified to have a significant correlation with a lower cancer specific survival (CSS) (HR 3.33, 95%-CI [2.17–5.00]; p -Value = 9.6*10 − 9 ), which is easy to use and has reproducible measurements. Conclusions Pre-operative independence assessment by indices of ADL represents a predictor for overall survival after resection of brain metastases. Especially the easily, objectively and rapidly applicable Katz-Score is a very helpful tool to assess the pre-operative status, which could be additionally included in clinical decision making in daily practice.
    Type of Medium: Online Resource
    ISSN: 1471-2407
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 2041352-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    In: Journal of Extracellular Vesicles, Wiley, Vol. 6, No. 1 ( 2017-12)
    Abstract: To evaluate whether tumour‐derived microvesicles (T‐MV), originating from the plasma membrane, represent suitable cancer biomarkers, we isolated MV from peripheral blood samples of cancer patients with locally advanced and/or metastatic solid tumours ( n  = 330, including 79 head & neck cancers, 74 lung cancers, 41 breast cancers, 28 colorectal cancers and 108 with other cancer forms) and controls ( n  = 103). Whole MV preparations were characterised using flow cytometry. While MV carrying the tumour‐associated proteins MUC1, EGFR and EpCAM were found to be enhanced in a tumour‐subtype‐specific way in patients' blood, expression of the matrix metalloproteinase inducer EMMPRIN was increased independent of tumour type. Higher levels of EMMPRIN + ‐MV correlated significantly with poor overall survival, whereas the other markers were prognostic only in specific tumour subgroups. By combining all four tumour‐associated antigens, cancer patients were separated from healthy controls with an AUC of up to 0.85. Ex vivo , whole MV preparations from cancer patients, in contrast to those of controls, induced a tumour‐supporting phenotype in macrophages and increased tumour cell invasion, which was dependent on the highly glycosylated isoform of EMMPRIN. In conclusion, the detection of T‐MV in whole blood, even in minor amounts, is feasible with standard techniques, proves functionally relevant and correlates with clinical outcome.
    Type of Medium: Online Resource
    ISSN: 2001-3078 , 2001-3078
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2683797-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    In: Glia, Wiley, Vol. 66, No. 11 ( 2018-11), p. 2438-2455
    Abstract: Mutations and activation of the PI3K signaling pathway in breast cancer cells have been linked to brain metastases. However, here we describe that in some breast cancer brain metastases samples the protein expression of PI3K signaling components is restricted to the metastatic microenvironment. In contrast to the therapeutic effects of PI3K inhibition on the breast cancer cells, the reaction of the brain microenvironment is less understood. Therefore we aimed to quantify the PI3K pathway activity in breast cancer brain metastasis and investigate the effects of PI3K inhibition on the central nervous system (CNS) microenvironment. First, to systematically quantify the PI3K pathway activity in breast cancer brain metastases, we performed a prospective biomarker study using a reverse phase protein array (RPPA). The majority, namely 30 out of 48 (62.5%) brain metastatic tissues examined, revealed high PI3K signaling activity that was associated with a median overall survival (OS) of 9.41 months, while that of patients, whose brain metastases showed only moderate or low PI3K activity, amounted to only 1.93 and 6.71 months, respectively. Second, we identified PI3K as a master regulator of metastasis‐promoting macrophages/microglia during CNS colonization; and treatment with buparlisib (BKM120), a pan‐PI3K Class I inhibitor with a good blood‐brain‐barrier penetrance, reduced their metastasis‐promoting features. In conclusion, PI3K signaling is active in the majority of breast cancer brain metastases. Since PI3K inhibition does not only affect the metastatic cells but also re‐educates the metastasis‐promoting macrophages/microglia, PI3K inhibition may hold considerable promise in the treatment of brain metastasis and the respective microenvironment.
    Type of Medium: Online Resource
    ISSN: 0894-1491 , 1098-1136
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1474828-9
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...