Related Experiment Video

Updated: Aug 7, 2026

Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess
07:35

Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess

Published on: June 1, 2022

Protective effect of N-(2-propynyl)-2-(5-benzyloxy-indolyl) methylamine (PF9601N) on mitochondrial permeability

V Battaglia1, E Sanz, M Salvi

  • 1Dipartimento di Chimica Biologica, Università di Padova, and Istituto di Neuroscienze del C.N.R., Unità per lo studio delle Biomembrane, Viale G. Colombo 3, 35121 Padova, Italy.

Cellular and Molecular Life Sciences : CMLS
|June 13, 2006
PubMed

Insights

PF9601N protects mitochondria from toxins by preventing permeability transition and inhibiting apoptosis. Its antioxidant properties, not MAO B inhibition, are key to its neuroprotective effects.

Area of Science:

  • Neuroscience
  • Mitochondrial Biology
  • Pharmacology

Background:

  • Monoamine oxidase (MAO) B inhibitors are explored for neuroprotection.
  • PF9601N, a novel MAO B inhibitor, exhibits potential neuroprotective properties against dopaminergic toxins.

Purpose of the Study:

  • To elucidate the mechanisms underlying PF9601N's neuroprotective effects.
  • To assess the impact of PF9601N on mitochondrial function and integrity.

Main Methods:

  • Assessing mitochondrial swelling, electrical potential, and oxidation of key molecules (sulfhydryl groups, glutathione, pyridine nucleotides) in response to calcium (Ca2+).
  • Evaluating the effect of PF9601N on mitochondrial permeability transition.
  • Investigating the role of PF9601N's chemical structure and antioxidant properties in its protective mechanisms.
  • Measuring the release of cytochrome c from mitochondria.
  • Comparing the inhibitory concentration (IC50) of PF9601N with deprenyl for mitochondria-mediated apoptosis.

Main Results:

  • PF9601N effectively prevents mitochondrial swelling, loss of electrical potential, and oxidation induced by Ca2+.
  • The compound protects against the induction of mitochondrial permeability transition.
  • Protection is attributed to the interaction of its protonated amino group and antioxidant capacity, not MAO B inhibition.
  • PF9601N inhibits the release of cytochrome c, indicating a role in preventing mitochondria-mediated apoptosis.
  • PF9601N demonstrates a lower IC50 value than deprenyl, suggesting superior efficiency in protecting mitochondrial bioenergetic functions.

Conclusions:

  • PF9601N offers significant protection to mitochondria by stabilizing permeability transition and preventing apoptosis.
  • Its neuroprotective mechanism relies on direct mitochondrial interaction and antioxidant activity rather than MAO B inhibition.
  • PF9601N represents a promising therapeutic agent for conditions involving mitochondrial dysfunction and neurodegeneration.

More Related Videos

Multi-parameter Measurement of the Permeability Transition Pore Opening in Isolated Mouse Heart Mitochondria13:42

Multi-parameter Measurement of the Permeability Transition Pore Opening in Isolated Mouse Heart Mitochondria

Published on: September 7, 2012

Simultaneous Measurement of Mitochondrial Calcium and Mitochondrial Membrane Potential in Live Cells by Fluorescent Microscopy08:43

Simultaneous Measurement of Mitochondrial Calcium and Mitochondrial Membrane Potential in Live Cells by Fluorescent Microscopy

Published on: January 24, 2017

Related Concept Videos

Mitochondrial Membranes01:45

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial precursors...
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...