Nuclear export inhibitor leptomycin B induces the appearance of novel forms of human Mdm2 protein
2003
Leptomycin B and its effects on human Mdm2 protein
publication
Evidence: moderate
Author Information
Author(s): Menéndez S, Higgins M, Berkson R G, Edling C, Lane D P, Laín S
Primary Institution: Department of Surgery and Molecular Oncology, Ninewells Hospital and Medical School, Dundee, UK
Hypothesis
Does leptomycin B induce changes in the human Mdm2 protein?
Conclusion
Leptomycin B induces the appearance of novel forms of the human Mdm2 protein, which may affect p53 stability.
Supporting Evidence
- Leptomycin B increases the levels of Mdm2 and p21 mRNAs.
- LMB induces the transcriptional activity of p53 without increasing p53 mRNA levels.
- LMB has a strong killing effect on neuroblastoma cell lines in a p53-dependent manner.
Takeaway
Leptomycin B is a drug that can change how a protein called Mdm2 behaves, which is important for cancer treatment.
Methodology
The study involved treating various cell lines with leptomycin B and analyzing the effects on Mdm2 protein levels and forms through Western blotting.
Digital Object Identifier (DOI)
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