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Bovine serum albumin uptake and polypeptide disaggregation studies of hypoglycemic ruthenium(II) uracil Schiff-base complexes.
Makanyane, Daniel M; Maikoo, Sanam; Van Heerden, Fanie R; Rhyman, Lydia; Ramasami, Ponnadurai; Mabuza, Lindokuhle P; Ngubane, Phikelelani; Khathi, Andile; Mambanda, Allen; Booysen, Irvin N.
Afiliación
  • Makanyane DM; School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, South Africa.
  • Maikoo S; School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, South Africa.
  • Van Heerden FR; School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, South Africa.
  • Rhyman L; Computational Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit 80837, Mauritius; Centre of Natural Product, Department of Chemical Sciences, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa.
  • Ramasami P; Computational Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit 80837, Mauritius; Centre of Natural Product, Department of Chemical Sciences, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa.
  • Mabuza LP; School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa. Electronic address: MabuzaL@ukzn.ac.za.
  • Ngubane P; School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa.
  • Khathi A; School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa.
  • Mambanda A; School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, South Africa.
  • Booysen IN; School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, South Africa. Electronic address: Booyseni@ukzn.ac.za.
J Inorg Biochem ; 255: 112541, 2024 Jun.
Article en En | MEDLINE | ID: mdl-38554578
ABSTRACT
Our prior studies have illustrated that the uracil ruthenium(II) diimino complex, [Ru(H3ucp)Cl(PPh3)] (1) (H4ucp = 2,6-bis-((6-amino-1,3-dimethyluracilimino)methylene)pyridine) displayed high hypoglycemic effects in diet-induced diabetic rats. To rationalize the anti-diabetic effects of 1, three new derivatives have been prepared, cis-[Ru(bpy)2(urdp)]Cl2 (2) (urdp = 2,6-bis-((uracilimino)methylene)pyridine), trans-[RuCl2(PPh3)(urdp)] (3), and cis-[Ru(bpy)2(H4ucp)](PF6)2 (4). Various physicochemical techniques were utilized to characterize the structures of the novel ruthenium compounds. Prior to biomolecular interactions or in vitro studies, the stabilities of 1-4 were monitored in anhydrous DMSO, aqueous phosphate buffer containing 2% DMSO, and dichloromethane (DCM) via UV-Vis spectrophotometry. Time-dependent stability studies showed ligand exchange between DMSO nucleophiles and chloride co-ligands of 1 and 3, which was suppressed in the presence of an excess amount of chloride ions. In addition, the metal complexes 1 and 3 are stable in both DCM and an aqueous phosphate buffer containing 2% DMSO. In the case of compounds 2 and 4 with no chloride co-ligands within their coordination spheres, high stability in aqueous phosphate buffer containing 2% DMSO was observed. Fluorescence emission titrations of the individual ruthenium compounds with bovine serum albumin (BSA) showed that the metal compounds interact non-discriminately within the protein's hydrophobic cavities as moderate to strong binders. The metal complexes were capable of disintegrating mature amylin amyloid fibrils. In vivo glucose metabolism studies in liver (Chang) cell lines confirmed enhanced glucose metabolism as evidenced by the increased glucose utilization and glycogen synthesis in liver cell lines in the presence of complexes 2-4.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Rutenio / Diabetes Mellitus Experimental / Complejos de Coordinación / Antineoplásicos Límite: Animals Idioma: En Revista: J Inorg Biochem Año: 2024 Tipo del documento: Article País de afiliación: Sudáfrica Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Rutenio / Diabetes Mellitus Experimental / Complejos de Coordinación / Antineoplásicos Límite: Animals Idioma: En Revista: J Inorg Biochem Año: 2024 Tipo del documento: Article País de afiliación: Sudáfrica Pais de publicación: Estados Unidos