Pharmacological inhibition of mitochondrial membrane permeabilization for neuroprotection

Toshio Hisatomi1, Tatsuro Ishibashi, Joan W Miller

  • 1Department of Ophthalmology, Kyushu University, Fukuoka, Japan. hisatomi@med.kyushu-u.ac.jp

Experimental Neurology
|March 24, 2009
PubMed

Insights

Mitochondrial membrane permeabilization (MMP) is key in neurodegenerative disease cell death. Pharmacological inhibition of MMP offers a promising strategy for developing novel neuroprotective treatments against these debilitating conditions.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pharmacology

Background:

  • Neurodegenerative diseases involve complex molecular mechanisms.
  • Cell death in vertebrates often occurs via the mitochondrial pathway of apoptosis.
  • Mitochondria release proapoptotic factors like cytochrome c and AIF, crucial in cell death.
  • Mitochondrial membrane permeabilization (MMP) is a critical, irreversible step in apoptosis.

Purpose of the Study:

  • To review the potential of pharmacologically inhibiting mitochondrial membrane permeabilization (MMP) for neuroprotection.
  • To highlight MMP as a therapeutic target for neurodegenerative diseases.
  • To discuss the limitations of current neurodegenerative disease treatments.

Main Methods:

  • Literature review focusing on pharmacological inhibition of MMP.
  • Analysis of molecular mechanisms of apoptosis and neurodegeneration.
  • Examination of existing and potential therapeutic strategies.

Main Results:

  • MMP is a central event in the pathogenesis of neurodegenerative diseases.
  • Pharmacological inhibition of MMP has shown potential in preclinical studies.
  • Current treatments for neurodegenerative diseases are largely symptomatic.

Conclusions:

  • Targeting MMP represents a promising avenue for developing effective neuroprotective therapies.
  • Further research into MMP inhibitors is warranted for treating neurodegenerative diseases.
  • Inhibiting MMP could offer a disease-modifying approach rather than just symptom management.

Related Concept Videos

Neurochemical Transmission: Sites of Drug Action01:26

Neurochemical Transmission: Sites of Drug Action

Neurochemical transmission, the conduction of electrical impulses between neurons mediated by neurotransmitters, plays a vital role in various physiological processes. Autonomic drugs exert their effects by modulating neurotransmission within the autonomic nervous system. For instance, drugs such as hemicholinium block the precursor uptake necessary for synthesizing acetylcholine, an essential autonomic neurotransmitter. Following synthesis, neurotransmitters are stored in vesicles. Metyrosine...
Drugs Affecting Neurotransmitter Synthesis01:29

Drugs Affecting Neurotransmitter Synthesis

Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase, which converts...
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...
Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

Ligand-Gated Ion Channel Receptor: Gating Mechanism

Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
The Blood-brain Barrier00:49

The Blood-brain Barrier

Overview