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Updated: Jul 20, 2026
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Multi-parameter Measurement of the Permeability Transition Pore Opening in Isolated Mouse Heart Mitochondria
Published on: September 7, 2012
[Study of mitochondrial permeability for labeled cAMP]
Biulleten' Eksperimental'Noi Biologii I Meditsiny
|October 1, 1981
Summary
Cyclic adenosine monophosphate (cAMP) enters rat liver mitochondria, accumulating within all mitochondrial fractions. This finding supports cAMP
Area of Science:
- Biochemistry
- Cell Biology
- Mitochondrial Function
Background:
- Cyclic adenosine monophosphate (cAMP) is a crucial second messenger involved in various cellular signaling pathways.
- Mitochondria play a central role in cellular energy production and are increasingly recognized for their involvement in signaling.
Purpose of the Study:
- To investigate the penetration and distribution of cAMP within rat liver mitochondria.
- To explore the relationship between cAMP levels and mitochondrial respiration.
Main Methods:
- Incubation of isolated rat liver mitochondria with radiolabeled cAMP (3H- and 14C-cAMP).
- Subfractionation of mitochondria using digitonin and Triton X-100.
- Quantification of cAMP distribution across mitochondrial fractions.
Main Results:
- cAMP successfully penetrated rat liver mitochondria under conditions that activate mitochondrial respiration.
- Radiolabeled cAMP was detected in all investigated mitochondrial subfractions.
- A strong positive correlation (r = +0.97) was observed between the labeling of intact mitochondria and their subfractions, indicating cAMP accumulation.
Conclusions:
- cAMP can enter and distribute within mitochondria.
- Mitochondria accumulate cAMP, suggesting a direct role in mitochondrial function or signaling.
- These findings open new avenues for understanding cAMP's influence on mitochondrial respiration and cellular processes.
