Sulfonamido carboranes as highly selective inhibitors of cancer-specific carbonic anhydrase IX
| Autor: | Viswanath Das, Jan Nekvinda, Jiří Brynda, K. Pospisilova, Marian Hajduch, Stanislava Matějková, Jana Dvořanová, Martina Medvedíková, Josef Holub, Soňa Gurská, Bohumír Grüner, Miroslav Havránek, Vlastimil Král, M. Kugler, Barbora Liskova, Pavlína Řezáčová, Suzan El Anwar, Václav Šícha, Milan Fábry, Petr Džubák |
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| Rok vydání: | 2020 |
| Předmět: |
Cell
Antineoplastic Agents Breast Neoplasms Mice SCID 01 natural sciences 03 medical and health sciences Mice Structure-Activity Relationship Dogs Antigens Neoplasm Drug Discovery medicine Animals Humans Doxorubicin Cytotoxicity Carbonic Anhydrase IX Carbonic Anhydrase Inhibitors Cells Cultured 030304 developmental biology ADME Cell Proliferation Pharmacology chemistry.chemical_classification 0303 health sciences Mice Inbred BALB C Sulfonamides biology Dose-Response Relationship Drug Molecular Structure 010405 organic chemistry Organic Chemistry Active site General Medicine Neoplasms Experimental Recombinant Proteins 0104 chemical sciences Enzyme medicine.anatomical_structure chemistry Biochemistry Cell culture biology.protein Carborane Drug Screening Assays Antitumor medicine.drug |
| Zdroj: | European journal of medicinal chemistry. 200 |
| ISSN: | 1768-3254 |
| Popis: | Carbonic anhydrase IX (CA IX) is a transmembrane enzyme overexpressed in hypoxic tumors, where it plays an important role in tumor progression. Specific CA IX inhibitors potentially could serve as anti-cancer drugs. We designed a series of sulfonamide inhibitors containing carborane clusters based on prior structural knowledge of carborane binding into the enzyme active site. Two types of carborane clusters, 12-vertex dicarba-closo-dodecaborane and 11-vertex 7,8-dicarba-nido-undecaborate (dicarbollide), were connected to a sulfonamide moiety via aliphatic linkers of varying lengths (1–4 carbon atoms; n = 1–4). In vitro testing of CA inhibitory potencies revealed that the optimal linker length for selective inhibition of CA IX was n = 3. A 1-sulfamidopropyl-1,2-dicarba-closo-dodecaborane (3) emerged as the strongest CA IX inhibitor from this series, with a Ki value of 0.5 nM and roughly 1230-fold selectivity towards CA IX over CA II. X-ray studies of 3 yielded structural insights into their binding modes within the CA IX active site. Compound 3 exhibited moderate cytotoxicity against cancer cell lines and primary cell lines in 2D cultures. Cytotoxicity towards multicellular spheroids was also observed. Moreover, 3 significantly lowered the amount of CA IX on the cell surface both in 2D cultures and spheroids and facilitated penetration of doxorubicin. Although 3 had only a moderate effect on tumor size in mice, we observed favorable ADME properties and pharmacokinetics in mice, and preferential presence in brain over serum. |
| Databáze: | OpenAIRE |
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