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Blood, 15 March 2004, Vol. 103, No. 6, pp. 2358-2362.
Prepublished online as a Blood First Edition Paper on November 20, 2003; DOI 10.1182/blood-2003-07-2200.

Submitted July 9, 2003
Accepted November 4, 2003
Mutations of the PML tumor suppressor gene in APL
Carmela Gurrieri, Khedoudja Nafa, Taha Merghoub, Rosa Bernardi, Paola Capodieci, Andrea Biondi, Stephen Nimer, Dan Douer, Carlos Cordon-Cardo, Robert Gallagher, and Pier Paolo Pandolfi*
Molecular Biology Program, Department of Pathology and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
Centro Ricerca M. Tettamanti, Clinica Pediatrica Universita di Milano Biocca, Milan, Italy
Division of Hematology, University of Southern California Medical School and Norris Cancer Center, Los Angeles, CA, USA
Montefiore Medical Center and Albert Einstein Cancer Center, New York, NY, USA
* Corresponding author; email: p-pandolfi{at}ski.mskcc.org.
The PML tumor suppressor of APL is essential for a number of pro-apoptotic and growth suppressive pathways as well as for the activity of differentiating agents such as RA. In human APL, the dose of PML is reduced to heterozygosity given that one allele is involved in the chromosomal translocation while the status of the remaining PML allele is unknown. We have therefore screened by single strand conformational polymorphism (SSCP) and sequencing analysis, DNA from APL patients for mutations at the PML locus. We identified DNA sequence variations resulting in a truncated PML protein in APL cases that displayed RA resistance and a very poor prognosis. Mutation analysis also led to the identification of aberrant PML sequence variations in other hemopoietic malignancies. Complete functional loss of PML is therefore selected by the APL phenotype and associates with poor prognosis and RA unresponsiveness.

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