Bovine serum albumin uptake and polypeptide disaggregation studies of hypoglycemic ruthenium(II) uracil Schiff-base complexes
Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved..
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.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:255 |
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| Enthalten in: |
Journal of inorganic biochemistry - 255(2024) vom: 30. Apr., Seite 112541 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Makanyane, Daniel M [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 16.04.2024 Date Revised 16.04.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jinorgbio.2024.112541 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM370441087 |
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| 100 | 1 | |a Makanyane, Daniel M |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Bovine serum albumin uptake and polypeptide disaggregation studies of hypoglycemic ruthenium(II) uracil Schiff-base complexes |
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| 500 | |a Date Revised 16.04.2024 | ||
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| 520 | |a Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved. | ||
| 520 | |a 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 | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Amylin disaggregation | |
| 650 | 4 | |a BSA uptake | |
| 650 | 4 | |a Glucose metabolism | |
| 650 | 4 | |a Imino | |
| 650 | 4 | |a Ruthenium | |
| 650 | 4 | |a Uracil | |
| 650 | 7 | |a Coordination Complexes |2 NLM | |
| 650 | 7 | |a Serum Albumin, Bovine |2 NLM | |
| 650 | 7 | |a 27432CM55Q |2 NLM | |
| 650 | 7 | |a Ruthenium |2 NLM | |
| 650 | 7 | |a 7UI0TKC3U5 |2 NLM | |
| 650 | 7 | |a Dimethyl Sulfoxide |2 NLM | |
| 650 | 7 | |a YOW8V9698H |2 NLM | |
| 650 | 7 | |a Hypoglycemic Agents |2 NLM | |
| 650 | 7 | |a Chlorides |2 NLM | |
| 650 | 7 | |a Pyridines |2 NLM | |
| 650 | 7 | |a Peptides |2 NLM | |
| 650 | 7 | |a Ruthenium Compounds |2 NLM | |
| 650 | 7 | |a Glucose |2 NLM | |
| 650 | 7 | |a IY9XDZ35W2 |2 NLM | |
| 650 | 7 | |a Phosphates |2 NLM | |
| 650 | 7 | |a Antineoplastic Agents |2 NLM | |
| 650 | 7 | |a Ligands |2 NLM | |
| 700 | 1 | |a Maikoo, Sanam |e verfasserin |4 aut | |
| 700 | 1 | |a Van Heerden, Fanie R |e verfasserin |4 aut | |
| 700 | 1 | |a Rhyman, Lydia |e verfasserin |4 aut | |
| 700 | 1 | |a Ramasami, Ponnadurai |e verfasserin |4 aut | |
| 700 | 1 | |a Mabuza, Lindokuhle P |e verfasserin |4 aut | |
| 700 | 1 | |a Ngubane, Phikelelani |e verfasserin |4 aut | |
| 700 | 1 | |a Khathi, Andile |e verfasserin |4 aut | |
| 700 | 1 | |a Mambanda, Allen |e verfasserin |4 aut | |
| 700 | 1 | |a Booysen, Irvin N |e verfasserin |4 aut | |
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