PMID- 11181703 OWN - NLM STAT- MEDLINE DCOM- 20010517 LR - 20240213 IS - 0022-1007 (Print) IS - 1540-9538 (Electronic) IS - 0022-1007 (Linking) VI - 193 IP - 4 DP - 2001 Feb 19 TI - Role of promyelocytic leukemia (PML) protein in tumor suppression. PG - 521-29 AB - The promyelocytic leukemia (PML) gene encodes a putative tumor suppressor gene involved in the control of apoptosis, which is fused to the retinoic acid receptor alpha (RARalpha) gene in the vast majority of acute promyelocytic leukemia (APL) patients as a consequence of chromosomal translocations. The PMLRARalpha oncoprotein is thought to antagonize the function of PML through its ability to heterodimerize with and delocalize PML from the nuclear body. In APL, this may be facilitated by the reduction to heterozygosity of the normal PML allele. To determine whether PML acts as a tumor suppressor in vivo and what the consequences of deregulated programmed cell death in leukemia and epithelial cancer pathogenesis are, we crossed PML(-/-) mice with human cathepsin G (hCG)-PMLRARalpha or mammary tumor virus (MMTV)/neu transgenic mice (TM), models of leukemia and breast cancer, respectively. The progressive reduction of the dose of PML resulted in a dramatic increase in the incidence of leukemia, and in an acceleration of leukemia onset in PMLRARalpha TM. By contrast, PML inactivation did not affect neu-induced tumorigenesis. In hemopoietic cells from PMLRARalpha TM, PML inactivation resulted in impaired response to differentiating agents such as RA and vitamin D3 as well as in a marked survival advantage upon proapoptotic stimuli. These results demonstrate that: (a) PML acts in vivo as a tumor suppressor by rendering the cells resistant to proapoptotic and differentiating stimuli; (b) PML haploinsufficiency and the functional impairment of PML by PMLRARalpha are critical events in APL pathogenesis; and (c) aberrant control of programmed cell death plays a differential role in solid tumor and leukemia pathogenesis. FAU - Rego, E M AU - Rego EM AD - Department of Human Genetics and Molecular Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA. FAU - Wang, Z G AU - Wang ZG FAU - Peruzzi, D AU - Peruzzi D FAU - He, L Z AU - He LZ FAU - Cordon-Cardo, C AU - Cordon-Cardo C FAU - Pandolfi, P P AU - Pandolfi PP LA - eng GR - CA74031/CA/NCI NIH HHS/United States GR - R01 CA071692/CA/NCI NIH HHS/United States GR - P30 CA008748/CA/NCI NIH HHS/United States GR - R01 CA074031/CA/NCI NIH HHS/United States GR - CA71692/CA/NCI NIH HHS/United States GR - R37 CA071692/CA/NCI NIH HHS/United States GR - CA08748/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Exp Med JT - The Journal of experimental medicine JID - 2985109R RN - 0 (Neoplasm Proteins) RN - 0 (Nuclear Proteins) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (Pml protein, mouse) RN - 0 (Promyelocytic Leukemia Protein) RN - 0 (Transcription Factors) RN - 0 (Tumor Suppressor Proteins) RN - 0 (fas Receptor) RN - 0 (promyelocytic leukemia-retinoic acid receptor alpha fusion oncoprotein) RN - 1C6V77QF41 (Cholecalciferol) SB - IM CIN - J Exp Med. 2001 Feb 19;193(4):F15-8. PMID: 11181707 MH - Animals MH - Apoptosis/genetics MH - Cholecalciferol/pharmacology MH - Disease-Free Survival MH - Female MH - *Genes, Tumor Suppressor MH - Leukemia, Promyelocytic, Acute/etiology/*genetics/mortality MH - Mammary Neoplasms, Experimental/etiology/genetics/mortality MH - Mice MH - Mice, Mutant Strains MH - Mice, Transgenic MH - Neoplasm Proteins/*genetics MH - *Nuclear Proteins MH - Oncogene Proteins, Fusion/genetics MH - Promyelocytic Leukemia Protein MH - Transcription Factors/*genetics MH - Tumor Suppressor Proteins MH - fas Receptor/metabolism PMC - PMC2195907 EDAT- 2001/02/22 11:00 MHDA- 2001/05/18 10:01 PMCR- 2001/08/19 CRDT- 2001/02/22 11:00 PHST- 2001/02/22 11:00 [pubmed] PHST- 2001/05/18 10:01 [medline] PHST- 2001/02/22 11:00 [entrez] PHST- 2001/08/19 00:00 [pmc-release] AID - 001443 [pii] AID - 10.1084/jem.193.4.521 [doi] PST - ppublish SO - J Exp Med. 2001 Feb 19;193(4):521-29. doi: 10.1084/jem.193.4.521.