Cited by 188Microtubule and mitosis dynamicsCancer-related Molecular PathwaysDNA Repair Mechanisms

Complete loss of the tumor suppressor MAD2 causes premature cyclin B degradation and mitotic failure in human somatic cells

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Michel, Loren, Diaz-Rodriguez, Elena, Narayan, Gopeshwar, Hernando, Eva, Murty, Vundavalli V. V. S., Benezra, Robert·2004·Proceedings of the National Academy of Sciences

Abstract

MAD2 inhibits the anaphase-promoting complex when chromosomes are unattached to the mitotic spindle. It acts as a tumor suppressor gene because MAD2+/–cells enter anaphase early and display chromosome instability, leading to the formation of lung tumors in mice. Complete MAD2 inactivation has not been identified in human tumors, although partial defects are prevalent. By employing RNA interference in human somatic cells, we found that severe reduction of MAD2 protein levels results in mitotic failure and extensive cell death arising from defective spindle formation, incomplete chromosome condensation, and premature mitotic exit leading to multinucleation. Cyclin B is degraded prematurely in the MAD2 short interfering RNA-treated cells but not in MAD2+/– cells, suggesting an explanation for the spindle failure and mitotic catastrophe in the MAD2 knockdown cells. Thus, anaphase-promoting complex substrates exhibit distinct sensitivities in the presence of different MAD2 doses, which in turn determine MAD2's role as either a tumor suppressor or an essential gene.

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Crossref · 10.1073/pnas.0306069101

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Authors
Michel, L., Diaz-Rodriguez, E., Narayan, G., Hernando, E., Murty, V. V. V. S., & Benezra, R.
Affiliations
  • Memorial Sloan Kettering Cancer Center (US)
  • Cancer Biology and Genetics Program and Departments of Medicine and Pathology, Memorial Sloan–Kettering Cancer Center, New York, NY 10021; Department of Pathology, College of Physicians and Surgeons, Columbia University, New York, NY 10032; and Sloan–Kettering Division, Graduate School of Medical Sciences, Cornell University, New York, NY 10021
Corresponding author
Benezra, Robert
Venue
Proceedings of the National Academy of Sciences
Published
2004-03-15
Volume
101
Issue
13
Pages
4459-4464
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2084314276
Cited by
188
References
37
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 3 · 2021: 6 · 2020: 8 · 2019: 7 · 2018: 7 · 2017: 3 · 2016: 9 · 2015: 7 · 2014: 9 · 2013: 6 · 2012: 7
FWCI
7.89
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Gredos (University of Salamanca) (publishedVersion, cc-by-nc-nd)
  • Hispana (publishedVersion, cc-by-nc-nd)
Funders
  • Memorial Sloan-Kettering Cancer Center
  • Brandeis University
  • National Institutes of Health (5k08ca085731-06)
  • National Cancer Institute (5K08CA085731-03, K08 CA085731)
  • National Institute of General Medical Sciences (R01GM054601)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
Mad2, tumor suppressor, anaphase-promoting complex, cyclin B degradation, mitotic failure, mitotic catastrophe, spindle assembly, chromosomal instability, multinucleation, chromosome condensation, RNAi knockdown
MeSH terms
Base Sequence, Calcium-Binding Proteins, Cell Cycle, Chromosomes, Human, Humans, Microscopy, Fluorescence, Mitosis, Repressor Proteins, Transfection, Genes, Tumor Suppressor, Open Reading Frames, Cell Death, Gene Deletion, Cell Cycle Proteins, Cyclin B, Genes, Essential, Mad2 Proteins

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