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The Influence of the 1-(3-Trifluoromethyl-Benzyl)-1H-Pyrazole-4-yl Moiety on the Adenosine Receptors Affinity Profile of Pyrazolo[4,3-e][1,2,4]Triazolo[1,5-c]Pyrimidine Derivatives
Please always quote using this URN: urn:nbn:de:bvb:20-opus-137133
- A new series of pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine (PTP) derivatives has been developed in order to explore their affinity and selectivity profile at the four adenosine receptor subtypes. In particular, the PTP scaffold was conjugated at the C2 position with the 1-(3-trifluoromethyl-benzyl)-1H-pyrazole, a group believed to confer potency and selectivity toward the human (h) A\(_{2B}\) adenosine receptor (AR) to the xanthine ligand 8-(1-(3-(trifluoromethyl) benzyl)-1H-pyrazol-4-yl)-1,3-dimethyl-1H-purine-2,6(3H, 7H)-dione (CVTA new series of pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine (PTP) derivatives has been developed in order to explore their affinity and selectivity profile at the four adenosine receptor subtypes. In particular, the PTP scaffold was conjugated at the C2 position with the 1-(3-trifluoromethyl-benzyl)-1H-pyrazole, a group believed to confer potency and selectivity toward the human (h) A\(_{2B}\) adenosine receptor (AR) to the xanthine ligand 8-(1-(3-(trifluoromethyl) benzyl)-1H-pyrazol-4-yl)-1,3-dimethyl-1H-purine-2,6(3H, 7H)-dione (CVT 6975). Interestingly, the synthesized compounds turned out to be inactive at the hA\(_{2B}\) AR but they displayed affinity at the hA\(_3\) AR in the nanomolar range. The best compound of the series (6) shows both high affinity (hA\(_3\) AR K\(_i\) = 11 nM) and selectivity (A\(_1\)/A\(_3\) and A\(_{2A}\)/A\(_3\) > 9090; A\(_{2B}\)/A\(_3\) > 909) at the hA\(_3\) AR. To better rationalize these results, a molecular docking study on the four AR subtypes was performed for all the synthesized compounds. In addition, CTV 6975 and two close analogues have been subjected to the same molecular docking protocol to investigate the role of the 1-(3-trifluoromethyl-benzyl)-1H-pyrazole on the binding at the four ARs.…
Author: | Stephanie Federico, Sara Redenti, Mattia Sturlese, Antonella Ciancetta, Sonja Kachler, Karl-Norbert Klotz, Barbara Cacciari, Stefano Moro, Giampiero Spalluto |
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URN: | urn:nbn:de:bvb:20-opus-137133 |
Document Type: | Journal article |
Faculties: | Medizinische Fakultät / Institut für Pharmakologie und Toxikologie |
Language: | English |
Parent Title (English): | PLoS One |
Year of Completion: | 2015 |
Volume: | 10 |
Issue: | 12 |
Pagenumber: | e0143504 |
Source: | PLoS ONE 10(12): e0143504. doi:10.1371/journal.pone.0143504 |
DOI: | https://doi.org/10.1371/journal.pone.0143504 |
Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
Tag: | A(2B) receptors; antagonists; classification; drug; human A(3); international union; mast cells; potent; protein-coupled receptors; subtypes; targets |
Release Date: | 2016/09/05 |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung |