PUBLICATION
Fluorinated benzenesulfonamide anticancer inhibitors of carbonic anhydrase IX exhibit lower toxic effects on zebrafish embryonic development than ethoxzolamide
- Authors
- Kazokaitė, J., Aspatwar, A., Kairys, V., Parkkila, S., Matulis, D.
- ID
- ZDB-PUB-160908-4
- Date
- 2017
- Source
- Drug and chemical toxicology 3: 1-11 (Journal)
- Registered Authors
- Keywords
- Carbonic anhydrase IX, benzenesulfonamides, zebrafish toxicity
- MeSH Terms
-
- Animals
- Antineoplastic Agents/chemical synthesis
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/toxicity*
- Carbonic Anhydrase IX/antagonists & inhibitors*
- Carbonic Anhydrase Inhibitors/chemical synthesis
- Carbonic Anhydrase Inhibitors/chemistry
- Carbonic Anhydrase Inhibitors/toxicity*
- Dose-Response Relationship, Drug
- Embryo, Nonmammalian/drug effects
- Embryonic Development/drug effects*
- Ethoxzolamide/chemistry
- Ethoxzolamide/toxicity*
- Lethal Dose 50
- Sulfonamides/chemical synthesis
- Sulfonamides/chemistry
- Sulfonamides/toxicity*
- Zebrafish/embryology*
- PubMed
- 27600313 Full text @ Drug Chem. Toxicol.
Citation
Kazokaitė, J., Aspatwar, A., Kairys, V., Parkkila, S., Matulis, D. (2017) Fluorinated benzenesulfonamide anticancer inhibitors of carbonic anhydrase IX exhibit lower toxic effects on zebrafish embryonic development than ethoxzolamide. Drug and chemical toxicology. 3:1-11.
Abstract
The toxic effects of two recently discovered inhibitors (VD12-09 and VD11-4-2) that selectively and with extraordinary strong, picomolar binding affinity to human carbonic anhydrase (CA) isoform IX were investigated on zebrafish embryonic development. CA IX has been recently introduced as an anticancer target since it is highly overexpressed in numerous human cancers but nearly absent in normal tissues. Morphological changes in zebrafish treated by the compounds were studied by light-field microscopy and histological analysis. Homology models of zebrafish CA II and CA IX were built to identify the conserved amino acid residues in the active site of zebrafish CAs. The toxicity studies here showed that the LC50 values at 120 hours post-fertilization (hpf) were 13 μM for VD12-09, 120 μM for VD11-4-2, and 9 μM for ethoxzolamide (EZA), a non-selective CA inhibitor commonly used as a drug in clinics. Thus, EZA was the most toxic of the three compounds. The zebrafish embryos exposed to LC50 doses of VD12-09 and VD11-4-2 showed fewer phenotypic abnormalities compared with the embryos exposed to the corresponding dose of EZA. Histochemical studies did not show any gross morphological changes in the embryos treated with VD12-09 and VD11-4-2 unlike EZA. The results of our study indicate that the compounds exhibited 10-fold lower toxicity and induced fewer side effects in zebrafish than EZA. Therefore, the exposure to VD11-4-2 and VD12-09 at concentrations below LC50 did not lead to deleterious effects on the zebrafish embryonic development and thus both inhibitors may be further developed as drugs.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping