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Sulfocoumarins, specific carbonic anhydrase IX and XII inhibitors, interact with cancer multidrug resistant phenotype through pH regulation and reverse P-glycoprotein mediated resistance. 2019

Ana Podolski-Renić, and Jelena Dinić, and Tijana Stanković, and Mirna Jovanović, and Amra Ramović, and Aleksandrs Pustenko, and Raivis Žalubovskis, and Milica Pešić
Institute for Biological Research "Sinisa Stankovic", University of Belgrade, Despota Stefana 142, 11060 Belgrade, Serbia. Electronic address: ana.podolski@ibiss.bg.ac.rs.

New 6-triazolyl-substituted sulfocoumarins were described as potent inhibitors of the transmembrane human carbonic anhydrase isoforms, CAIX and CAXII. These membrane associated enzymes that maintain pH and CO2 homeostasis are involved in cancer progression, invasion, and resistance to therapy. Recently, it was shown that CAXII expression associates with the expression of P-glycoprotein in multidrug resistant cancer cells. CAXII regulates P-glycoprotein activity by maintaining high intracellular pHi. In this study, the activity of three new sulfocoumarins was evaluated in three sensitive and corresponding multidrug resistant cancer cell lines with increased P-glycoprotein expression (non-small cell lung carcinoma, colorectal carcinoma and glioblastoma). Compound 3 showed the highest potential for cancer cell growth inhibition in all tested cell lines. Flow cytometric analyses showed that compound 3 induced intracellular acidification, cell cycle arrest in G2/M phase and necrosis in non-small cell lung carcinoma cells. Compound 3 demonstrated irreversible, concentration- and time-dependent inhibition of P-glycoprotein activity in multidrug resistant non-small cell lung carcinoma cells. The suppression of P-glycoprotein activity was accompanied with increased P-glycoprotein expression suggesting a compensatory mechanism of multidrug resistant cancer cells. In addition, compound 3 was able to sensitize multidrug resistant non-small cell lung carcinoma cells to doxorubicin. Overall, results imply that compound 3 has multidrug resistance modulating effect through intracellular acidification and subsequent inhibition of P-glycoprotein activity.

UI MeSH Term Description Entries
D009369 Neoplasms New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the properties of invasion and metastasis, compared to benign neoplasms. Benign Neoplasm,Cancer,Malignant Neoplasm,Tumor,Tumors,Benign Neoplasms,Malignancy,Malignant Neoplasms,Neoplasia,Neoplasm,Neoplasms, Benign,Cancers,Malignancies,Neoplasias,Neoplasm, Benign,Neoplasm, Malignant,Neoplasms, Malignant
D010641 Phenotype The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment. Phenotypes
D004791 Enzyme Inhibitors Compounds or agents that combine with an enzyme in such a manner as to prevent the normal substrate-enzyme combination and the catalytic reaction. Enzyme Inhibitor,Inhibitor, Enzyme,Inhibitors, Enzyme
D006706 Homeostasis The processes whereby the internal environment of an organism tends to remain balanced and stable. Autoregulation
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006863 Hydrogen-Ion Concentration The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH pH,Concentration, Hydrogen-Ion,Concentrations, Hydrogen-Ion,Hydrogen Ion Concentration,Hydrogen-Ion Concentrations
D000071231 Carbonic Anhydrase IX A carbonic anhydrase and transmembrane protein that consists of an N-terminal PROTEOGLYCAN-like domain, a catalytic region, a single-pass transmembrane domain, and a short intracellular tail. It functions as a dimer and is expressed primarily by cells of the GASTROINTESTINAL TRACT; BILE DUCT EPITHELIUM; and GALL BLADDER. It is expressed at high levels in many solid tumors, especially CLEAR CELL RENAL CARCINOMA, in response to CELL HYPOXIA. CAIX Protein,Carbonic Anhydrase 9
D045744 Cell Line, Tumor A cell line derived from cultured tumor cells. Tumor Cell Line,Cell Lines, Tumor,Line, Tumor Cell,Lines, Tumor Cell,Tumor Cell Lines
D049109 Cell Proliferation All of the processes involved in increasing CELL NUMBER including CELL DIVISION. Cell Growth in Number,Cellular Proliferation,Cell Multiplication,Cell Number Growth,Growth, Cell Number,Multiplication, Cell,Number Growth, Cell,Proliferation, Cell,Proliferation, Cellular
D059447 Cell Cycle Checkpoints Regulatory signaling systems that control the progression through the CELL CYCLE. They ensure that the cell has completed, in the correct order and without mistakes, all the processes required to replicate the GENOME and CYTOPLASM, and divide them equally between two daughter cells. If cells sense they have not completed these processes or that the environment does not have the nutrients and growth hormones in place to proceed, then the cells are restrained (or "arrested") until the processes are completed and growth conditions are suitable. Cell Cycle Arrest,Cell Cycle Control,Cell Cycle Transition Points,Cell Cycle-Transition Points,Arrest, Cell Cycle,Arrests, Cell Cycle,Cell Cycle Arrests,Cell Cycle Checkpoint,Cell Cycle Controls,Cell Cycle-Transition Point,Checkpoint, Cell Cycle,Checkpoints, Cell Cycle,Control, Cell Cycle,Controls, Cell Cycle,Cycle-Transition Point, Cell,Point, Cell Cycle-Transition

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