Cited by 567Chronic Myeloid Leukemia TreatmentsPI3K/AKT/mTOR signaling in cancerProtein Kinase Regulation and GTPase Signaling

Transformation of hematopoietic cells by BCR/ABL requires activation of a PI‐3k/Akt‐dependent pathway

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Skorski, Tomasz, Bellacosa, Alfonso, Nieborowska‐Skorska, Margaret, Majewski, Miroslaw, Martinez, Robert, Choi, John K., Trotta, Rossana, Wlodarski, Pawel +5 more·1997·The EMBO Journal

Abstract

The BCR/ABL oncogenic tyrosine kinase activates phosphatidylinositol 3-kinase (PI-3k) by a mechanism that requires binding of BCR/ABL to p85, the regulatory subunit of PI-3k, and an intact BCR/ABL SH2 domain. SH2 domain BCR/ABL mutants deficient in PI-3k activation failed to stimulate Akt kinase, a recently identified PI-3k downstream effector with oncogenic potential, but did activate p21 RAS and p70 S6 kinase. The PI-3k/Akt pathway is essential for BCR/ABL leukemogenesis as indicated by experiments demonstrating that wortmannin, a PI-3k specific inhibitor at low concentrations, suppressed BCR/ABL-dependent colony formation of murine marrow cells, and that a kinase-deficient Akt mutant with dominant-negative activity inhibited BCR/ABL-dependent transformation of murine bone marrow cells in vitro and suppressed leukemia development in SCID mice. In complementation assays using mouse marrow progenitor cells, the ability of transformation-defective SH2 domain BCR/ABL mutants to induce growth factor-independent colony formation and leukemia in SCID mice was markedly enhanced by expression of constitutively active Akt. In retrovirally infected mouse marrow cells, the BCR/ABL mutant lacking the SH2 domain was unable to upregulate the expression of c-Myc and Bcl-2; in contrast, expression of a constitutively active Akt mutant induced Bcl-2 and c-Myc expression, and stimulated the transcription activation function of c-Myc. Together, these data demonstrate the requirement for the BCR/ABL SH2 domain in PI-3k activation and document the essential role of the PI-3k/Akt pathway in BCR/ABL leukemogenesis.

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  1. Ahmed,N.N., Grimes,H.L., Bellacosa,A., Chan,T.O. and Tsichlis,P.N. (1997) Transduction of IL-2 anti-apoptotic and proliferative signals via Akt. Proc. Natl Acad. Sci. USA, 94, 3627-3632.

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Authors
Skorski, T., Bellacosa, A., Nieborowska‐Skorska, M., Majewski, M., Martinez, R., Choi, J. K., Trotta, R., Wlodarski, P., Perrotti, D., Chan, T. O., Wasik, M. A., Tsichlis, P. N., & Calabretta, B.
Affiliations
  • Fox Chase Cancer Center (US)
  • Thomas Jefferson University (US)
  • University of Pennsylvania (US)
Corresponding author
Calabretta, Bruno
Venue
The EMBO Journal
Published
1997-10-15
Volume
16
Issue
20
Pages
6151-6161
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2116396726
Cited by
567
References
78
Citations by year
2026: 3 · 2025: 2 · 2024: 2 · 2023: 4 · 2022: 8 · 2021: 3 · 2020: 3 · 2019: 5 · 2018: 12 · 2017: 9 · 2016: 11 · 2015: 15 · 2014: 19 · 2013: 16 · 2012: 18
FWCI
13.64
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • IRIS UNIMORE (University of Modena and Reggio Emilia) (submittedVersion, cc-by)
Funders
  • National Institutes of Health (7r29ca070815-04)
  • National Cancer Institute (1R29 CA70815)
Topics
  • Health Sciences › Medicine › Hematology › Chronic Myeloid Leukemia Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
BCR-ABL, PI-3K/Akt pathway, phosphatidylinositol 3-kinase, Akt kinase, SH2 domain, p85 regulatory subunit, hematopoietic cell transformation, leukemogenesis, wortmannin, p21ras, p70 S6 kinase, c-Myc, Bcl-2, SCID mice
MeSH terms
Animals, Bone Marrow, Bone Marrow Cells, Cell Transformation, Neoplastic, Enzyme Activation, Leukemia, Experimental, Liver, Mice, Inbred C57BL, Proto-Oncogene Proteins, Spleen, Signal Transduction, Fusion Proteins, bcr-abl, Genes, myc, Mice, SCID, Protein Serine-Threonine Kinases, Genes, bcl-2, Phosphatidylinositol 3-Kinases, Proto-Oncogene Proteins c-akt, Mice

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