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A Review on Coordination Properties of Thiol-Containing Chelating Agents Towards Mercury, Cadmium, and Lead

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2019
A_Review_on_pub_2019.pdf (5.265Mb)
Authors
Bjørklund, Geir
Crisponi, Guido
Nurchi, Valeria Marina
Cappai, Rosita
Buha-Đorđević, Aleksandra
Aaseth, Jan
Article (Published version)
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Abstract
The present article reviews the clinical use of thiol-based metal chelators in intoxications and overexposure with mercury (Hg), cadmium (Cd), and lead (Pb). Currently, very few commercially available pharmaceuticals can successfully reduce or prevent the toxicity of these metals. The metal chelator meso-2,3-dimercaptosuccinic acid (DMSA) is considerably less toxic than the classical agent British anti-Lewisite (BAL, 2,3-dimercaptopropanol) and is the recommended agent in poisonings with Pb and organic Hg. Its toxicity is also lower than that of DMPS (dimercaptopropane sulfonate), although DMPS is the recommended agent in acute poisonings with Hg salts. It is suggested that intracellular Cd deposits and cerebral deposits of inorganic Hg, to some extent, can be mobilized by a combination of antidotes, but clinical experience with such combinations are lacking. Alpha-lipoic acid (α-LA) has been suggested for toxic metal detoxification but is not considered a drug of choice in clinical pr...actice. The molecular mechanisms and chemical equilibria of complex formation of the chelators with the metal ions Hg2+, Cd2+, and Pb2+ are reviewed since insight into these reactions can provide a basis for further development of therapeutics.

Keywords:
BAL / DMPS / DMSA / Metal chelator / Metal ion
Source:
Molecules, 2019, 24, 3247, 1-32
Publisher:
  • MDPI
Projects:
  • VMN thanks Regione Autonoma della Sardegna - RASSR79857 “Metallo-farmaci innovativi: biotrasformazione e target biologici. Un approccio integrato”.
  • Innovation Sciences and Technologies (PON RI 2014-2020) at the University of Cagliari.
  • Improvement and development of hygienic and technological procedures in production of animal originating foodstuffs with the aim of producing high-quality and safe products competetive on the global market (RS-46009)

DOI: 10.3390/molecules24183247

ISSN: 1420-3049

PubMed: 31489907

WoS: 000488830500039

Scopus: 2-s2.0-85071777914
[ Google Scholar ]
14
11
URI
http://farfar.pharmacy.bg.ac.rs/handle/123456789/3460
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  • Radovi istraživača / Researchers’ publications
Institution
Pharmacy

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