Bis(thiosemicarbazone) Metal Complexes as Therapeutics for Neurodegenerative Diseases

S Mckenzie-Nickson, A I Bush, K J Barnham1

  • 1Department of Pharmacology and Therapeutics, University of Melbourne, Melbourne, Australia. kbarnham@unimelb.edu.au.

Insights

Bis(thiosemicarbazone) metal complexes show promise for treating neurodegenerative diseases like Alzheimer's and Parkinson's by correcting metal imbalance and reducing oxidative stress.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Biochemistry

Background:

  • Neurodegenerative diseases are characterized by pathological protein aggregation and oxidative stress.
  • Transition metal dyshomeostasis is linked to these disease pathologies.
  • Targeting metal imbalance presents a potential therapeutic strategy.

Purpose of the Study:

  • To review the therapeutic potential of bis(thiosemicarbazone) metal complexes.
  • To discuss their efficacy in animal models of neurodegenerative diseases.
  • To explore future implications for these compounds.

Main Methods:

  • Review of existing scientific literature on bis(thiosemicarbazone) metal complexes.
  • Analysis of studies involving animal models of Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis.
  • Evaluation of compound properties such as oral bioavailability and blood-brain barrier penetration.

Main Results:

  • Bis(thiosemicarbazone) metal complexes are orally bioavailable and can cross the blood-brain barrier.
  • These compounds effectively deliver bioavailable metal intracellularly.
  • Successful treatment of animal models for Alzheimer's, Parkinson's, and ALS has been demonstrated.

Conclusions:

  • Bis(thiosemicarbazone) metal complexes represent a promising therapeutic class for neurodegenerative diseases.
  • Their ability to address metal dyshomeostasis and oxidative stress is key to their efficacy.
  • Further development holds significant implications for future neurodegenerative disease treatments.

Related Concept Videos

Antidotes01:17

Antidotes

Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
1.3K
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
19.5K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.5K
Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
7.9K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
25.5K
Phase II Reactions: Miscellaneous Conjugation Reactions01:19

Phase II Reactions: Miscellaneous Conjugation Reactions

Phase II biotransformations are detoxification mechanisms that conjugate xenobiotics with endogenous substances, neutralizing their toxicity.
A key example involves the conjugation of cyanide ions, which impair cellular respiration and alter hemoglobin into non-oxygen-carrying cyanmethemoglobin. To neutralize this threat, a sulfur atom from thiosulphate is transferred to the cyanide ion, catalyzed by the enzyme rhodanese, resulting in an inactive compound called thiocyanate. The production of...
452