Luminescent Ruthenium Complexes for Theranostic Applications

Author(s)

Cardoso, Carolina R. ^[1] ; Lima, Marcia V. S. ^[1] ; Cheleski, Juliana ^[2] ; Peterson, Erica J. ^[3] ; Venancio, Tiago ^[1] ; Farrell, Nicholas P. ^{[3, 4]} ; Carlos, Rose M. ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Paulo - Brazil

^[3] Virginia Commonwealth Univ, Goodwin Lab, Massey Canc Ctr, Richmond, VA 23298 - USA

^[4] Virginia Commonwealth Univ, Dept Chem, Richmond, VA 23284 - USA

• Document type: Journal article
• Source: Journal of Medicinal Chemistry; v. 57, n. 11, p. 4906-4915, JUN 12 2014.
• Web of Science Citations: 26

Abstract

The water-soluble and visible luminescent complexes cis-{[}Ru(L-L)(2)(L)(2)](2+) where L-L = 2,2-bipyridine and 1,10-phenanthroline and L = imidazole, 1-methylimidazole, and histamine have been synthesized and characterized by spectroscopic techniques. Spectroscopic (circular dichroism, saturation transfer difference NMR, and diffusion ordered spectroscopy NMR) and isothermal titration calorimetry studies indicate binding of cis-{[}Ru(phen)(2)(ImH)(2)](2+) and human serum albumin occurs via noncovalent interactions with K-b = 9.8 x 10(4) mol(-1) L, Delta H = -11.5 +/- 0.1 kcal mol(-1), and T Delta S = -4.46 +/- 0.3 kcal mol(-1). High uptake of the complex into HCT116 cells was detected by luminescent confocal microscopy. Cytotoxicity of cis-{[}Ru(phen)(2)(ImH)(2)](2+) against proliferation of HCT116p53(+/+) and HCT116p53(-/-) shows IC50 values of 0.1 and 0.7 mu mol L-1. Flow cytometry and western blot indicate RuphenImH mediates cell cycle arrest in the G1 phase in both cells and is more prominent in p53(+/+). The complex activates proapoptotic PARP in p53(-/-), but not in p53(+/+). A cytostatic mechanism based on quantification of the number of cells during the time period of incubation is suggested. (AU)

• FAPESP's process: 09/08218-0 - New Mn(I)-photosentizer complexes: mimicking the electron donor side of photosystem II in artificial photosynthesis
• Grantee: Rose Maria Carlos
• Support type: Regular Research Grants