Cited by 186Mechanisms of cancer metastasisUbiquitin and proteasome pathwaysTGF-β signaling in diseases

The ubiquitin ligase gp78 promotes sarcoma metastasis by targeting KAI1 for degradation

Tsai, Yien Che, Mendoza, Arnulfo, Mariano, Jennifer M, Zhou, Ming, Kostova, Zlatka, Chen, Bo, Veenstra, Timothy, Hewitt, Stephen M +3 more·2007·Nature Medicine

Abstract

Metastasis is the primary cause of mortality from cancer, but the mechanisms leading to metastasis are poorly understood. In particular, relatively little is known about metastasis in cancers of mesenchymal origins, which are known as sarcomas. Approximately ten proteins have been characterized as 'metastasis suppressors', but how these proteins function and are regulated is, in general, not well understood. Gp78 (also known as AMFR or RNF45) is a RING finger E3 ubiquitin ligase that is integral to the endoplasmic reticulum (ER) and involved in ER-associated degradation (ERAD) of diverse substrates. Here we report that expression of gp78 has a causal role in the metastasis of an aggressive human sarcoma and that this prometastatic activity requires the E3 activity of gp78. Further, gp78 associates with and targets the transmembrane metastasis suppressor, KAI1 (also known as CD82), for degradation. Suppression of gp78 increases KAI1 abundance and reduces the metastatic potential of tumor cells, an effect that is largely blocked by concomitant suppression of KAI1. An inverse relationship between these proteins was confirmed in a human sarcoma tissue microarray. Whereas most previous efforts have focused on genetic mechanisms for the loss of metastasis suppressor genes, our results provide new evidence for post-translational downregulation of a metastasis suppressor by its ubiquitin ligase, resulting in abrogation of its metastasis-suppressing effects.

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Crossref · 10.1038/nm1686

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  • Ex vivo techniques have been adapted to study tumour-host interactions, screen for metastasis-related vulnerabilities, and validate hits from other screens.

    “These techniques have been adapted to study tumour-host interactions, to screen for metastasis-related vulnerabilities and to validate hits identified in other screens 74,75,92,216,217,218,219 .”

    From Osteosarcoma (2022) · cites this paper as [216]

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Authors
Tsai, Y. C., Mendoza, A., Mariano, J. M., Zhou, M., Kostova, Z., Chen, B., Veenstra, T., Hewitt, S. M., Helman, L. J., Khanna, C., & Weissman, A. M.
Affiliations
National Institutes of Health (US)
Corresponding author
  • Khanna, Chand
  • Weissman, Allan M
Venue
Nature Medicine
Published
2007-11-25
Volume
13
Issue
12
Pages
1504-1509
ISSN
  • 1078-8956 (ISSN-L)
  • 1546-170X
OpenAlex
W2074885850
Cited by
186
References
27
Citations by year
2026: 1 · 2024: 4 · 2023: 8 · 2022: 12 · 2021: 5 · 2020: 10 · 2019: 7 · 2018: 12 · 2017: 10 · 2016: 10 · 2015: 13 · 2014: 11 · 2013: 15 · 2012: 16
FWCI
4.63
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • DigitalCommons-Cedarville (Cedarville University) (submittedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mechanisms of cancer metastasis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
Keywords
gp78, KAI1, CD82, sarcoma metastasis, E3 ubiquitin ligase, protein degradation, metastasis suppressor, ER-associated degradation, post-translational regulation, mesenchymal tumors
MeSH terms
Animals, Endoplasmic Reticulum, Humans, Mesoderm, Neoplasm Metastasis, Proteins, Sarcoma, Transfection, Receptors, Cytokine, Oligonucleotide Array Sequence Analysis, Ubiquitin-Protein Ligases, Cell Line, Tumor, Mice, Kangai-1 Protein, RING Finger Domains, Receptors, Autocrine Motility Factor

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