Cited by 20Multiple Myeloma Research and TreatmentsCell death mechanisms and regulationCancer-related Molecular Pathways

PU.1 induces apoptosis in myeloma cells through direct transactivation of TRAIL.

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Ueno, S, Tatetsu, H, Hata, H, Iino, T, Niiro, H, Akashi, K, Tenen, D G, Mitsuya, H +1 more·2009·Oncogene

Abstract

We earlier reported that PU.1 was downregulated in myeloma cell lines and myeloma cells in a subset of myeloma patients, and that conditional PU.1 expression in PU.1-negative myeloma cell lines, U266 and KMS12PE, induced growth arrest and apoptosis. To elucidate the molecular mechanisms of the growth arrest and apoptosis, we performed DNA microarray analyses to compare the difference in gene expression before and after PU.1 induction in U266 cells. Among cell cycle-related genes, cyclin A2, cyclin B1, CDK2 and CDK4 were downregulated and p21 was upregulated, although among apoptosis-related genes, tumor necrosis factor (TNF)-related apoptosis inducing ligand (TRAIL) was found highly upregulated. When TRAIL was knocked down by small interference RNAs, apoptosis of PU-1-expressing cells was inhibited, suggesting that TRAIL has a critical role in PU.1-induced apoptosis in both U266 and KMS12PE myeloma cells. In both U266 and KMS12PE cells expressing PU.1, PU.1 directly bound to a region 30 bp downstream of the transcription start site of the TRAIL gene. Upregulation of PU.1-induced transactivation of the TRAIL promoter in reporter assays, and disruption of the PU.1-binding site in the TRAIL promoter eliminated this transactivation. Therefore, we conclude that PU.1 is capable of inducing apoptosis in certain myeloma cells by direct transactivation of TRAIL.

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Crossref · 10.1038/onc.2009.263

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  • In various cell types PU.1 induces expression of TRAIL and Ink4b, which respectively induce apoptosis and inhibit cell proliferation.

    “In various cell types PU.1 has also been shown to induce expression of TRAIL and Ink4b, which respectively induce apoptosis and inhibit cell proliferation [28], [29].”

    From The Transcription Factor PU.1 Regulates γδ T Cell Homeostasis (2011) · cites this paper as [28]

    The Discussion (page unavailable) reports that PU.1 directly increases TRAIL expression and that TRAIL contributes to apoptosis in two myeloma cell lines. It explicitly says TRAIL induction in other hematopoietic lineages remains to be investigated, so this paper does not establish the broader claim about various cell types. Ink4b appears to be associated with the sentence’s other citation. (LLM, conf=0.84)

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Authors
Ueno, S., Tatetsu, H., Hata, H., Iino, T., Niiro, H., Akashi, K., Tenen, D. G., Mitsuya, H., & Okuno, Y.
Affiliations
  • Kumamoto University (JP)
  • Kyushu University (JP)
  • Harvard University (US)
Corresponding author
Okuno, Y
Venue
Oncogene
Published
2009-09-14
Volume
28
Issue
46
Pages
4116-4125
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W2002225588
Cited by
20
References
34
Citations by year
2024: 2 · 2022: 1 · 2021: 1 · 2019: 1 · 2017: 5 · 2015: 2 · 2014: 1 · 2012: 2
FWCI
1.56
Type
journal article
Language
en
Open access
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • National University of Singapore (submittedVersion)
Funders
  • International Myeloma Foundation
  • National Cancer Institute (R01CA041456)
Topics
  • Health Sciences › Medicine › Hematology › Multiple Myeloma Research and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
PU.1, TRAIL, multiple myeloma, apoptosis, transcriptional activation, transcription factor binding sites, U266 cells, gene expression profiling, p21
MeSH terms
Interferon Regulatory Factor-4, Proto-Oncogene Protein Spi-1, Cell Cycle, Humans, Interferons, Multiple Myeloma, Promoter Regions, Genetic, Protein Binding, Proto-Oncogene Proteins, Transcriptional Activation, Trans-Activators, Gene Expression Regulation, Neoplastic, Apoptosis, Cell Line, Tumor, Cyclin-Dependent Kinase Inhibitor p21, Interferon Regulatory Factors, Interferon Regulatory Factor-7, TNF-Related Apoptosis-Inducing Ligand

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