The role of the Wilms tumour gene (WT1) in normal and malignant haematopoiesis

Suzie Ariyaratana; David M. Loeb

doi:10.1017/S1462399407000336

The role of the Wilms tumour gene (WT1) in normal and malignant haematopoiesis

Published online by Cambridge University Press: 24 May 2007

Suzie Ariyaratana and

David M. Loeb

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Suzie Ariyaratana: Affiliation:
Division of Pediatric Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD, USA.
David M. Loeb*: Affiliation:
Division of Pediatric Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD, USA.
*: *Corresponding author: David M. Loeb, Pediatric Oncology, Bunting-Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD 21231, USA. Tel: +1 410 955 2457; Fax: +1 410 955 8897; E-mail: [email protected]

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Abstract

In addition to its loss playing a pivotal role in the development of a childhood kidney malignancy, the Wilms tumour 1 gene (WT1) has emerged as an important factor in normal and malignant haematopoiesis. Preferentially expressed in CD34+ haematopoietic progenitors and down-regulated in more-differentiated cells, the WT1 transcription factor has been implicated in regulation of apoptosis, proliferation and differentiation. Putative target genes, such as BCL2, MYC, A1 and cyclin E, may cooperate with WT1 to modulate cell growth. However, the effects of WT1 on target gene expression appear to be isoform-specific. Certain WT1 isoforms are over-represented in leukaemia, but the exact mechanisms underlying the role of WT1 in transformation remain unclear. The ubiquity of WT1 in haematological malignancies has led to efforts to exploit it as a marker for minimal residual disease and as a prognostic factor, with conflicting results. In vitro killing of tumour cells by WT1-specific CD8+ cytotoxic T lymphocytes facilitated design of Phase I vaccine trials that showed clinical regression of WT1-positive tumours. Alternative methods employing WT1-specific immunotherapy are being investigated and might ultimately be used to optimise multimodal therapy of haematological malignancies.

Type: Research Article
Information: Expert Reviews in Molecular Medicine , Volume 9 , Issue 14 , May 2007 , pp. 1 - 17

DOI: https://doi.org/10.1017/S1462399407000336 [Opens in a new window]
Copyright: Copyright © Cambridge University Press 2007

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The role of the Wilms tumour gene (WT1) in normal and malignant haematopoiesis

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The role of the Wilms tumour gene (WT1) in normal and malignant haematopoiesis

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