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Large Scale Conversion of Trilobolide into the Payload of Mipsagargin: 8- O-(12-Aminododecanoyl)-8- O-Debutanoylthapsigargin. Biomolecules 2020; 10:biom10121640. [PMID: 33291419 PMCID: PMC7762042 DOI: 10.3390/biom10121640] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 11/26/2020] [Accepted: 12/03/2020] [Indexed: 12/11/2022] Open
Abstract
In spite of the impressing cytotoxicity of thapsigargin (Tg), this compound cannot be used as a chemotherapeutic drug because of general toxicity, causing unacceptable side effects. Instead, a prodrug targeted towards tumors, mipsagargin, was brought into clinical trials. What substantially reduces the clinical potential is the limited access to Tg and its derivatives and cost-inefficient syntheses with unacceptably low yields. Laser trilobum, which contains a structurally related sesquiterpene lactone, trilobolide (Tb), is successfully cultivated. Here, we report scalable isolation of Tb from L. trilobum and a transformation of Tb to 8-O-(12-aminododecanoyl)-8-O-debutanoylthapsigargin in seven steps. The use of cultivated L. trilobum offers an unlimited source of the active principle in mipsagargin.
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Huml L, Havlová D, Longin O, Staňková E, Holubová B, Kuchař M, Prokudina E, Rottnerová Z, Zimmermann T, Drašar P, Lapčík O, Jurášek M. Stanazolol derived ELISA as a sensitive forensic tool for the detection of multiple 17α-methylated anabolics. Steroids 2020; 155:108550. [PMID: 31812623 DOI: 10.1016/j.steroids.2019.108550] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 10/17/2019] [Accepted: 12/02/2019] [Indexed: 12/28/2022]
Abstract
Two valuable forensic tools based on enzyme-linked immunoassays (ELISAs) for the analysis of 17α-methylated steroids were developed using haptens of stanazolol and its conjugates with biotin. Haptens containing terminal carboxylic group were conjugated to bovine serum albumin (BSA), rabbit serum albumin (RSA) or ovalbumin (OVA). Eight batches of antisera (RAbs) obtained by immunization of rabbits were tested in an indirect competitive ELISA system using immobilization of RSA conjugate (RSA/hapten) and competitor immobilization of the biotinylated conjugate (AB-ELISA) to avidin (avidin/hapten). The best results were achieved with the RAb 212 antibodies in RSA/ST-3 and avidin/ST-10 assembled variants. For the RSA/ST-3 system, an IC50 of 0.3 ng/mL and a detection limit of 0.02 ng/mL were measured. In case of avidin/ST-10 variant, IC50 was of 3.9 ng/mL and a detection limit of 0.57 ng/mL were obtained. The effect of solvent was tested as well as the stability of coated microtiter plates over four-month period. The cross-reactivity of the developed assays with other anabolic steroids was tested and high sensitivity towards 17α-methylated steroids was observed. RSA/ST-3 assay showed significant cross-reactivity with 17α-methyltestosterone (81.2%), oxymetholone (30.4%), methandienone (10.0%) and methyl dihydrotestosterone (7.7%). Similarly, in the avidin/ST-10 assay, 17α-methyltestosterone (34.5%), mestanolone (32.1%), oxymetholone (22.7%), methandienone (14.2%), 9-dehydromethyltestosterone (12.5%) and oxandrolone (1.2%) exhibited high cross-reactivity. The functionality of the developed systems was verified by the successful identification of a series of 17α-methylated anabolic steroids in a set of real samples including pharmaceutical preparations seized by the Police of the Czech Republic on the black market.
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Affiliation(s)
- Lukáš Huml
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Dominika Havlová
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Ondřej Longin
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Eliška Staňková
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Barbora Holubová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Martin Kuchař
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Elena Prokudina
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Zdeňka Rottnerová
- Central Laboratory of Mass Spectroscopy, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Tomáš Zimmermann
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Pavel Drašar
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Oldřich Lapčík
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic
| | - Michal Jurášek
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, CZ-166 28 Prague, Czech Republic.
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Harmatha J, Buděšínský M, Jurášek M, Zimmermann T, Drašar P, Zídek Z, Kmoníčková E, Vejvodová L. Structural modification of trilobolide for upgrading its immunobiological properties and reducing its cytotoxic action. Fitoterapia 2019; 134:88-95. [PMID: 30731148 DOI: 10.1016/j.fitote.2019.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 02/01/2019] [Accepted: 02/03/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Juraj Harmatha
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, CZ-166 10 Prague 6, Czech Republic.
| | - Miloš Buděšínský
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, CZ-166 10 Prague 6, Czech Republic
| | - Michal Jurášek
- University of Chemistry and Technology in Prague, CZ-1660 10 Prague 6, Czech Republic
| | - Tomáš Zimmermann
- University of Chemistry and Technology in Prague, CZ-1660 10 Prague 6, Czech Republic
| | - Pavel Drašar
- University of Chemistry and Technology in Prague, CZ-1660 10 Prague 6, Czech Republic
| | - Zdeněk Zídek
- Institute of Experimental Medicine, The Czech Academy of Sciences, CZ-142 20 Prague 4, Czech Republic
| | - Eva Kmoníčková
- Institute of Experimental Medicine, The Czech Academy of Sciences, CZ-142 20 Prague 4, Czech Republic; Department of Pharmacology and Toxicology, Faculty of Medicine in Pilsen, Charles University, 323 00 Pilsen, Czech Republic
| | - Lucie Vejvodová
- Department of Pharmacology and Toxicology, Faculty of Medicine in Pilsen, Charles University, 323 00 Pilsen, Czech Republic; Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, CZ-323 00 Pilsen, Czech Republic
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