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Apoptotic molecules and MPTP-induced cell death

A Nicotra1, S Parvez

  • 1Dipartimento di Biologia Animale e dell'Uomo, Università di Roma La Sapienza, Viale dell'Università 32, 00185 Rome, Italy. antonietta.nicotra@uniroma1.it

Neurotoxicology and Teratology
|August 30, 2002
PubMed

Insights

MPTP/MPP(+) neurotoxicity in Parkinson's disease models involves apoptosis. Key molecules like Bcl-2, Bax, JNK, and caspases play roles in dopaminergic neuron loss, clarified through genetic models and cell cultures.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pharmacology

Background:

  • MPTP-induced neurotoxicity is a key model for Parkinson's disease (PD) pathogenesis.
  • MPTP causes selective dopaminergic neuron loss in the substantia nigra (SN), mirroring PD.
  • MPP(+), the active MPTP metabolite, induces cell death in neuronal cultures.

Purpose of the Study:

  • To review recent findings on MPTP/MPP(+) neurotoxicity mechanisms.
  • To explore the link between MPTP/MPP(+) effects and apoptotic pathways.
  • To investigate the involvement of specific molecules in MPTP/MPP(+)-induced neurotoxicity.

Main Methods:

  • Utilized genetically manipulated systems: transgenic mice and transfected cell lines.
  • Administered MPTP in vivo to mice.
  • Used in vitro neuronal cell cultures (MN9D, SH-SY5Y, cerebellar granule neurons, cortical neurons, GH3 cells) with MPP(+).

Main Results:

  • Evidence suggests Bcl-2, Bax, JNK, and caspases are implicated in MPTP-induced neurotoxicity in vivo.
  • Bcl-2, Bax, and caspases were investigated for their role in MPP(+)-induced neurotoxicity in vitro.
  • Apoptotic pathways are increasingly linked to MPTP/MPP(+) neurotoxicity.

Conclusions:

  • Apoptotic pathways are critically involved in MPTP/MPP(+) neurotoxicity.
  • Specific molecules like Bcl-2, Bax, JNK, and caspases are key players in this neurodegenerative process.
  • Further research using genetic models and cell cultures is vital for understanding PD pathogenesis.

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