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Correlation between the inhibition of cell growth by bis(ethyl)polyamine analogues and the decrease in the function

Y He¹, T Suzuki, K Kashiwagi

¹Faculty of Pharmaceutical Sciences, Chiba University, Japan.

European Journal of Biochemistry

|April 1, 1994

Summary

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Bis(ethyl)polyamine analogues inhibit cell growth by disrupting protein synthesis, particularly in mitochondria. Their accumulation, not just polyamine deficiency, is key to this antiproliferative effect.

Area of Science:

Biochemistry
Cell Biology
Pharmacology

Background:

Polyamines are essential for cell growth and proliferation.
Polyamine analogues are investigated for their potential antiproliferative effects.

Purpose of the Study:

To compare the antiproliferating effects of nine bis(ethyl)polyamine analogues on FM3A cells.
To elucidate the mechanisms underlying the antiproliferative action of these analogues.

Main Methods:

FM3A cells were treated with nine different bis(ethyl)polyamine analogues.
Inhibitory effects on cell growth were assessed.
Protein synthesis, ATP content, and mitochondrial function were analyzed.

Main Results:

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Significant differences in antiproliferative activity were observed among the analogues, with BE4444 showing the strongest effect.

Accumulation of bis(ethyl)polyamine analogues inhibited protein synthesis and decreased ATP content.

Mitochondrial protein synthesis was more sensitive to inhibition than cytoplasmic protein synthesis.

Mitochondrial dysfunction, including swelling and DNA depletion, was observed.

Conclusions:

Both polyamine deficiency and analogue accumulation contribute to inhibiting cell growth.
Bis(ethyl)polyamine analogues primarily inhibit protein synthesis, especially within mitochondria.
Disruption of mitochondrial function is an early event in the cellular response to these analogues.