Cited by 143Chronic Myeloid Leukemia TreatmentsProtein Tyrosine PhosphatasesAcute Myeloid Leukemia Research

Expression of Interferon Consensus Sequence Binding Protein (ICSBP) Is Downregulated in Bcr-Abl-Induced Murine Chronic Myelogenous Leukemia-Like Disease, and Forced Coexpression of ICSBP Inhibits Bcr-Abl-Induced Myeloproliferative Disorder

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Hao, Sheryl X., Ren, Ruibao·2000·Molecular and Cellular Biology

Abstract

Chronic myelogenous leukemia (CML) is a clonal myeloproliferative disorder resulting from the neoplastic transformation of a hematopoietic stem cell. The majority of cases of CML are associated with the (9;22) chromosome translocation that generates the bcr-abl chimeric gene. Alpha interferon (IFN-alpha) treatment induces hematological remission and prolongs life in 75% of CML patients in the chronic phase. It has been shown that mice deficient in interferon consensus sequence binding protein (ICSBP), a member of the interferon regulatory factor family, manifest a CML-like syndrome. We have shown that expression of Bcr-Abl in bone marrow (BM) cells from 5-fluorouracil (5-FU)-treated mice by retroviral transduction efficiently induces a myeloproliferative disease in mice resembling human CML. To directly test whether icsbp can function as a tumor suppressor gene, we examined the effect of ICSBP on Bcr-Abl-induced CML-like disease using this murine model for CML. We found that expression of the ICSBP protein was significantly decreased in Bcr-Abl-induced CML-like disease. Forced coexpression of ICSBP inhibited the Bcr-Abl-induced colony formation of BM cells from 5-FU-treated mice in vitro and Bcr-Abl-induced CML-like disease in vivo. Interestingly, coexpression of ICSBP and Bcr-Abl induced a transient B-lymphoproliferative disorder in the murine model of Bcr-Abl-induced CML-like disease. Overexpression of ICSBP consistently promotes rather than inhibits Bcr-Abl-induced B lymphoproliferation in a murine model where BM cells from non-5-FU-treated donors were used, indicating that ICSBP has a specific antitumor activity toward myeloid neoplasms. We also found that overexpression of ICSBP negatively regulated normal hematopoiesis. These data provide direct evidence that ICSBP can act as a tumor suppressor that regulates normal and neoplastic proliferation of hematopoietic cells.

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Crossref · 10.1128/mcb.20.4.1149-1161.2000

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  • In the mouse model with a CML-like disease induced by Bcr-Abl, ICSBP expression was downregulated, and the mouse disease was ameliorated by coexpression of ICSBP.

    “In the mouse model with a CML-like disease induced by Bcr-Abl, ICSBP expression was also downregulated. Interestingly, the mouse disease was ameliorated by coexpression of ICSBP. (52)”

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Authors
Hao, S. X., & Ren, R.
Affiliations
Brandeis University (US)
Venue
Molecular and Cellular Biology
Published
2000-02-01
Volume
20
Issue
4
Pages
1149-1161
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2096038076
Cited by
143
References
48
Citations by year
2026: 1 · 2023: 1 · 2021: 5 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 3 · 2016: 10 · 2015: 6 · 2014: 4 · 2013: 5 · 2012: 6
FWCI
7.42
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Cancer Institute (CA68008, R01CA068008)
Topics
  • Health Sciences › Medicine › Hematology › Chronic Myeloid Leukemia Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
Keywords
IRF8, BCR-ABL, chronic myeloid leukemia, myeloproliferative neoplasms, tumor suppressor, interferon regulatory factors, B-cell lymphoproliferative disorders, hematopoietic regulation, bone marrow cells, retroviral transduction, colony formation
MeSH terms
Interferon Regulatory Factor-8, Animals, Antimetabolites, Antineoplastic, B-Lymphocytes, Base Sequence, Colony-Forming Units Assay, Disease Models, Animal, Fluorouracil, Hematopoiesis, Humans, Interferons, Lymphoproliferative Disorders, Male, Mice, Inbred BALB C, Myeloproliferative Disorders, Repressor Proteins, Translocation, Genetic, Leukemia, Myelogenous, Chronic, BCR-ABL Positive, Down-Regulation, Bone Marrow Transplantation, Genes, abl, Consensus Sequence, DNA Primers, Interferon Regulatory Factors, Mice

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