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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cyclopalladated compounds containing 2,6-lutidine: Synthesis, spectral and biological studies

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Author(s):
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da Cunha, Gislaine A. [1] ; de Souza, Ronan F. F. [1] ; de Farias, Renan L. [1] ; Moreira, Mariete B. [1] ; Silva, Debora E. S. [1] ; Zanetti, Renan D. [1] ; Garcia, Daniel M. [2] ; Spindola, Daniel G. [2] ; Michelin, Luis F. G. [2] ; Bincoletto, Claudia [2] ; de Souza, Aline A. [3] ; Antunes, Alyne A. [3] ; Judice, Wagner A. de S. [3] ; Leitao, Renan C. F. [4] ; Deflon, Victor M. [4] ; Mauro, Antonio E. [1] ; Netto, Adelino V. G. [1]
Total Authors: 17
Affiliation:
[1] UNESP Univ Estadual Paulista, Inst Chem, BR-14800060 Araraquara, SP - Brazil
[2] Sao Paulo Fed Univ UNIFESP, Dept Pharmacol, Sao Paulo Med Sch, BR-04044020 Sao Paulo, SP - Brazil
[3] Univ Mogi das Cruzes, CIIB, Av Candido Xavier de Almeida Souza 200, CP 411, BR-08701970 Mogi Das Cruzes, SP - Brazil
[4] Univ Sao Paulo, Sao Carlos Inst Chem IQSC, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Journal of Inorganic Biochemistry; v. 203, FEB 2020.
Web of Science Citations: 4
Abstract

Bridge splitting reactions between {[}Pd(C-2,N-dmba)(mu-X)](2) (dmba = N,N-dimethylbenzylamine; X = Cl, I, N-3, NCO) and 2,6-lutidine (lut) in the 1:2 molar ratio at room temperature afforded cyclopalladated compounds of general formulae {[}Pd(C-2,N-dmba)(X)(lut)] [X = Cl- (1), I-(2), NNN-(3), NCO-(4)], which were characterized by elemental analyses and infrared (IR), H-1 NMR spectroscopy. The molecular structures of all synthesized palladacycles have been solved by single-crystal X-ray crystallography. The cytotoxicity of the cyclopalladated compounds has been evaluated against a panel of murine [mammary carcinoma (4T1) and melanoma (B16F10-Nex2)] and human [melanoma (A2058, SK-MEL-110 and SK-MEL-5) tumor cell lines. All complexes were about 10 to 100-fold more active than cisplatin, depending on the tested tumor cell line. For comparison purposes, the cytotoxic effects of 1-4 towards human lung fibroblasts (MRC-5) have also been tested. The late apoptosis-inducing properties of 1-4 compounds in SK-MEL-5 cells were verified 24 h incubation using annexin V-Fluorescein isothiocyanate (FITC)/propidium iodide (PI). The binding properties of the model compound 1 on human serum albumin (USA) and calf thymus DNA (ct-DNA) have been studied using circular dichroism and fluorescence spectroscopy. Docking simulations have been carried out to gain more information about the interaction of the palladacycle and HSA. The ability of compounds 1-4 to inhibit the activity of cathepsin B and L has also been investigated in this work. (AU)

FAPESP's process: 12/15486-3 - Pd(II) compounds: synthesis, cytotoxicity, and DNA binding studies
Grantee:Regina Celia Galvao Frem
Support Opportunities: Regular Research Grants
FAPESP's process: 14/02205-1 - Study of kinetic behavior of convertases
Grantee:Wagner Alves de Souza Júdice
Support Opportunities: Regular Research Grants
FAPESP's process: 09/54011-8 - Acquisition of a single-crystal X-ray diffractometer for the structural analysis of small molecules and proteins
Grantee:Victor Marcelo Deflon
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 16/25112-4 - Evaluation of modulators of the activity of proteases involved in pathological processes
Grantee:Wagner Alves de Souza Júdice
Support Opportunities: Regular Research Grants