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18. Liver function after bilateral nephrectomy

Author

Fleck, C., primary, Börner, A., additional, Kretzschmar, M., additional, Machnik, G., additional, Sprott, H., additional, Zimmermann, T., additional, Kell, E., additional, and Bräunlich, H., additional

Published
2008
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31. Liver function after bilateral nephrectomy.

Author

Fleck, C., Börner, A., Kretzschmar, M., Machnik, G., Sprott, H., Zimmermann, T., Kell, E., and Bräunlich, H.

Abstract

ABSTRACT- Consequences of bilateral nephrectomy (NX) for liver functions and for hepatic excretion of various endogenous substances were characterized in rats 24 h after NX. Plasma concentrations of urea, creatinine, fibrinogen, and glutathione increased significantly after NX, whereas the concentrations of total protein, albumin, and lipids decreased. The hepatic excretion of urea, creatinine, phospholipids, cholesterol, and aldosterone significantly increased in uremia, and excretions of protein and glutathione diminished. Active biliary transport can be diminished after NX by the effects of uremic toxins on the liver cells or by the competition phenomena between endogenous substances, which are normally excreted in urine, at the hepatocellular level. Reduced glutathione content and increased lipid peroxidation in hepatocytes have been found. Changes in lipid and protein metabolism after NX can be proved. [ABSTRACT FROM AUTHOR]

Published
1992
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50. A Dot-Blot Screening for Identifying the Temozolomide-Regulated Proteins as Potential Targets for Glioma Multi-OMICS Studies.

Author

Bielecka-Wajdman AM, Machnik G, Linnebacher C, Linnebacher M, Stec-Grosman K, and Obuchowicz E

Subjects
Humans, Cell Line, Tumor, Cell Movement drug effects, Biomarkers, Tumor metabolism, Biomarkers, Tumor genetics, Axl Receptor Tyrosine Kinase, Proto-Oncogene Proteins metabolism, Proto-Oncogene Proteins genetics, Survivin metabolism, Survivin genetics, Dacarbazine pharmacology, Dacarbazine analogs & derivatives, Multiomics, Temozolomide pharmacology, Temozolomide therapeutic use, Glioma drug therapy, Glioma metabolism, Glioma genetics, Glioma pathology, Antineoplastic Agents, Alkylating pharmacology, Antineoplastic Agents, Alkylating therapeutic use, Brain Neoplasms drug therapy, Brain Neoplasms metabolism, Brain Neoplasms pathology, Brain Neoplasms genetics, Proteomics methods
Abstract

Background: Malignant gliomas represent a heterogenous group of brain cancers that are characterized by infiltrative growth that lacks a clearly identifiable tumor border. The lack of the possibility of radical surgical resection and targeted therapy results in a poor prognosis. Although Temozolomide (TMZ) is still the leading chemotherapeutic agent in glioma treatment, its efficacy is limited due to the development of tumor resistance. Therefore, there an urgent need to improve the diagnosis and treatment of these tumors. Finding and developing biomarkers that are specific to glioma could be useful for both identifying therapy targets and monitoring treatment as well as for constructing a personalized therapy. However, there are still no reliable markers that would change the quality of glioma treatment., Methods: In this study, differences in the expression of 84 cancer-related proteins in three glioma cell lines were analyzed using the dot-blot method: commercial T98G cells and two patient-derived cell lines. The influence of TMZ on changes in protein expression, cell morphology, and migration was also investigated (Proteome Profiler Human XL Oncology Array, LeviCell System, Microscopic imaging). The lines that were analyzed were characterized by a remarkably different plasticity of protein expression and the proteomic alterations that were induced by TMZ., Results: A dot-blot analysis revealed ten proteins that were common to all of the lines and five (Cathepsin b, FGF, Survivin, AXL, Osteopontin) that were modulated by the TMZ. As a result of the exposure of TMZ, the proteins that are involved in chemoresistance and invasion (TIE-2, Thrombospondin) were detected in both the HROG02 and T98G cell lines. In the control culture (not exposed to TMZ) of HROG17 cells, the proteins that are involved in metabolism were strongly suppressed., Conclusions: The presented data sheds new light on the modulatory effect of Temozolomide on the expression of a protein panel: Cathepsin b, fibroblast growth factor (FGF), Survivin, AXL, and Osteopontin that may suggest their potential as therapeutic targets or biomarkers to monitoring therapy effects. However, further high-throughput analysis and detection of the proteins in the body fluids are necessary., (© 2024 The Author(s). Published by IMR Press.)

Published
2024
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