Related Experiment Video For PRIMA-1
Updated: Apr 27, 2026
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Characterizing the sphingomyelinase pathway triggered by PRIMA-1 derivatives in lung cancer cells with differing p53
Eroica Soans1, Susan C Evans2, Cynthia Cipolla2
1Department of Chemistry and Biochemistry, Konneker Research Laboratories, Ohio University, The Ridges-Ohio University, Athens, OH, U.S.A. eroica.soans@stjude.org.
Background/Aim:
Derivatives of PRIMA-1 compound, 8a and 8b have been shown to increase cytotoxicity in lung cancer cells through sphingomyelinase pathways in IR and 8a or 8b co-treated lung cancer cells. The goal of the present study was to further elaborate the molecular mechanism of 8a- or 8b-treated lung cancer cells in order to understand their potential as anti-cancer drugs.
Materials And Methods:
Biochemical assays, western blot, flow cytometry and gene array analyses were employed to distinguish these mechanisms.
Results:
Herein we demonstrated that 8a and 8b cause apoptosis with S-phase arrest in lung cancer cells by activating neutral sphingomyelinase with ceramide production. 8a induces expression of TNF family genes while 8b induces p53-mediated apoptosis genes. Protein analysis shows an increased expression in caspase 8, bcl-2, bax, caspase 9 and cytochrome c.
Conclusion:
PRIMA-1 derivatives provoke cytotoxicity in lung cancer cells mainly through the neutral sphingomyelinase-dependent apoptosis pathway.
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