Deletion of Pten in CD45-expressing cells leads to development of T-cell lymphoblastic lymphoma but not myeloid malignancies.

Blood
Cristina MirantesXavier Dolcet

Abstract

Since its discovery in the late 1990s, Pten has turned out to be one of the most important tumor suppressor genes. Pten loss results in increased activation of the phosphatidylinositol 3-kinase/Akt signaling pathway, which is associated with increased proliferation, survival, and neoplastic growth. Here, we have addressed the effects of conditional deletion of Pten in hematopoietic cells by crossing Pten conditional knockout mice with a knock-in mouse expressing the Cre recombinase in the CD45 locus. CD45 is also known as leukocyte common antigen, and it is expressed in virtually all white cells and in hematopoietic stem cells. Using a reporter mouse, we demonstrate that CD45:Cre mouse displays recombinase activity in both myeloid and lymphoid cells. However, deletion of Pten in CD45-expressing cells induces development of T-cell acute lymphoblastic leukemia and lymphoma, but not other hematologic malignancies.

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Citations

Mar 30, 2017·The Journal of Pathology·Maria Alba DosilXavier Dolcet
Nov 13, 2019·Cold Spring Harbor Perspectives in Medicine·Yilin WuHong Wu
Jun 13, 2019·Blood Advances·Carlos Murga-ZamalloaRyan A Wilcox
Jul 29, 2021·The Biochemical Journal·Majid MomenyJukka Westermarck

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