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001-es BibID:	BIBFORM084891
Első szerző:	Farkas Etelka (vegyész)
Cím:	Carbamoylphosphonate-based matrix metalloproteinase inhibitor metal complexes: solution studies and stability constants. Towards a zinc-selective binding group / Etelka Farkas, Yiffat Katz, Sudhakar Bhusare, Reuven Reich, Gerd-Volker Röschenthaler, Martin Königsmann, Eli Breuer
Dátum:	2004
ISSN:	0949-8257
Megjegyzések:	Overactive matrix metalloproteinases (MMPs) are associated with a variety of disease states. Therefore, their inhibition is a highly desirable goal. Yet, more than a decade of worldwide activity has not produced even one clinically useful inhibitor. Because of the crucial role of zinc in the activity of the enzyme, the design of inhibitors is usually based upon a so-called zinc binding group (ZBG). Yet, many of the hitherto synthesized potent inhibitors failed clinically, presumably because they bind stronger to metals other than zinc. We have developed in vivo potent inhibitors based on the carbamoylphosphonic group as a putative ZBG. In this paper we report stability constants for Ca(II), Mg(II), Zn(II) and Cu(II) complexes of two potent, in vivo active, MMP inhibitors, cyclopentylcarbamoylphosphonic acid (1) and 2-(N,N-dimethylamino)ethylcarbamoylphosphonic acid (2). Precipitation prevented the determination of stability constants for iron(III) complexes of 1 and 2. For comparison with carbamoylphosphonates 1 and 2, we synthesized 2-cyclohexyl-1,1-difluoroethylphosphonic acid (3), which does not inhibit MMP, and determined the stability constants of its complexes with Mg(II), Ca(II) and Zn(II). Comparison with the values obtained from the complexes of 1 and 2 with those from 3 indicates participation of the C=O group in the metal binding of the former compounds. The complex stability orders for both 1 and 2 are Ca(II)<Mg(II)<Zn(II)<- Cu(II). In addition, the results indicate that at pH>8 the dimethylamino group of compound 2 can also participate in the binding of the transition metals Cu and Zn. On the other hand, the amino group in carbamoylphosphonic acid 2 lowers the stability of the complexes with metals favoring oxygen ligands (Ca, Mg and Fe) and increases the selectivity towards Zn. These results are helpful for rationalizing the results observed on our MMP inhibitors hitherto examined, and are expected to be useful for the design of new selective inhibitors.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Carbamoylphosphonic acids Matrix metalloproteinase inhibitors Metal complexes Zinc binding groups
Megjelenés:	Journal Of Biological Inorganic Chemistry. - 9 : 3 (2004), p. 307-315. -
További szerzők:	Katz, Yiffat Bhusare, Sudhakar Reich, Reuven Röschenthaler, Gerd-Volker Königsmann, Martin Breuer, Eli
Pályázati támogatás:	TS 040685 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM084854
035-os BibID:	(cikkazonosító)P 242
Első szerző:	Farkas Etelka (vegyész)
Cím:	Ligand architectures as factors affecting the thermodynamic and redox stability of metal ion-siderophore complexes / Etelka Farkas, Orsolya Szabó, István Pócsi
Dátum:	2014
ISSN:	0949-8257
Tárgyszavak:	Természettudományok Kémiai tudományok idézhető absztrakt folyóiratcikk
Megjelenés:	Journal of Biological Inorganic Chemistry. - 19 : Suppl 2 (2014), p. S861. -
További szerzők:	Szabó Orsolya (vegyész) Pócsi István (1961-) (vegyész)
Pályázati támogatás:	TÁMOP 4.2.2.A-11/1/KONV-2012-0043 TÁMOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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