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Grioli SM, Alonso EN, Mascaró E, Stabile SA, Ferronato MJ, Quevedo MA, Radivoy G, Facchinetti MM, Vitale CA, Curino AC. Structure-Activity Relationship Study of an Alkynylphosphonate and Vynil phosphonate Analogues of Calcitriol. Med Chem 2020; 17:230-246. [PMID: 32819231 DOI: 10.2174/1573406416999200818145115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 07/05/2020] [Accepted: 07/20/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND 1α,25-dihydroxy vitamin D3 (calcitriol) shows potent growth-inhibitory properties on different cancer cell lines, but its hypercalcemic effects have severely hampered its therapeutic application. Therefore, it is important to develop synthetic calcitriol analogues that retain or even increase its antitumoral effects and lack hypercalcemic activity. Based on previous evidence of the potent antitumor effects of the synthetic alkynylphosphonate EM1 analogue, we have now synthesized a derivative called SG. OBJECTIVE The aim of the present work is to evaluate the calcemic activity and the antitumor effect of SG, comparing these effects with those exerted by calcitriol and with those previously published for EM1. In addition, we propose to analyze by in silico studies, the chemical structure-biological function relationship of these molecules. METHODS We performed the synthesis of vinylphosphonate SG analogue; in vitro assays on different cancer cell lines; in vivo assays on mice; and in silico assays applying computational molecular modeling. RESULTS The SG compound lacks hypercalcemic activity, similar to the parent compound EM1. However, the antitumor activity was blunted, as no antiproliferative or anti-migratory effects were observed. By in silico assays, we demonstrated that SG analogue has a lower affinity for the VDRligand- binding domain than the EM1 compound due to lack of interaction with the important residues His305 and His397. CONCLUSION These results demonstrate that the chemical modification in the lateral side chain of the SG analogue affects the antitumoral activity observed previously for EM1 but does not affect the calcemic activity. These results contribute to the rational design and synthesis of novel calcitriol analogues.
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Affiliation(s)
- Silvina M Grioli
- Laboratorio de Quimica Organica, Instituto de Quimica del Sur (INQUISUR), Universidad Nacional del Sur (UNS), CONICET, Departamento de Quimica (UNS), Bahia Blanca, 8000, Argentina
| | - Eliana N Alonso
- Laboratorio de Biología del Cancer, Instituto de Investigaciones Bioquimicas de Bahia Blanca (INIBIBB), Universidad Nacional del Sur (UNS)-CONICET, Departamento de Biologia, Bioquimica y Farmacia (UNS), Bahia Blanca, 8000, Argentina
| | - Evangelina Mascaró
- Laboratorio de Quimica Organica, Instituto de Quimica del Sur (INQUISUR), Universidad Nacional del Sur (UNS), CONICET, Departamento de Quimica (UNS), Bahia Blanca, 8000, Argentina
| | - Santiago A Stabile
- Laboratorio de Quimica Organica, Instituto de Quimica del Sur (INQUISUR), Universidad Nacional del Sur (UNS), CONICET, Departamento de Quimica (UNS), Bahia Blanca, 8000, Argentina
| | - María J Ferronato
- Laboratorio de Biología del Cancer, Instituto de Investigaciones Bioquimicas de Bahia Blanca (INIBIBB), Universidad Nacional del Sur (UNS)-CONICET, Departamento de Biologia, Bioquimica y Farmacia (UNS), Bahia Blanca, 8000, Argentina
| | - Mario A Quevedo
- Unidad de Investigacion y Desarrollo en Tecnologia Farmaceutica (UNITEFA-CONICET), Facultad de Ciencias Quimicas, Ciudad Universitaria, Universidad Nacional de Cordoba, Cordoba, 5000, Argentina
| | - Gabriel Radivoy
- Laboratorio de Quimica Organica, Instituto de Quimica del Sur (INQUISUR), Universidad Nacional del Sur (UNS), CONICET, Departamento de Quimica (UNS), Bahia Blanca, 8000, Argentina
| | - María M Facchinetti
- Laboratorio de Biología del Cancer, Instituto de Investigaciones Bioquimicas de Bahia Blanca (INIBIBB), Universidad Nacional del Sur (UNS)-CONICET, Departamento de Biologia, Bioquimica y Farmacia (UNS), Bahia Blanca, 8000, Argentina
| | - Cristian A Vitale
- Laboratorio de Quimica Organica, Instituto de Quimica del Sur (INQUISUR), Universidad Nacional del Sur (UNS), CONICET, Departamento de Quimica (UNS), Bahia Blanca, 8000, Argentina
| | - Alejandro C Curino
- Laboratorio de Biología del Cancer, Instituto de Investigaciones Bioquimicas de Bahia Blanca (INIBIBB), Universidad Nacional del Sur (UNS)-CONICET, Departamento de Biologia, Bioquimica y Farmacia (UNS), Bahia Blanca, 8000, Argentina
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