Molecular analysis of the JAZF1-JJAZ1 gene fusion by RT-PCR and fluorescence in situ hybridization in endometrial stromal neoplasms.
Nonrandom cytogenetic abnormalities of chromosomes 6, 7, and 17 have been reported within low-grade endometrial stromal sarcomas (LGESSs), and among these abnormalities, the t(7;17)(p15;q21) is the most common aberration described. Previously we had shown that this translocation joins 2 genes, JAZF1 and JJAZ1, located on chromosomes 7 and 17, respectively. To determine the frequency of the t(7;17), we analyzed 4 stromal nodules and 24 LGESS by both reverse transcriptase-polymerase chain reaction and fluorescence in situ hybridization (FISH). In addition, we examined 4 cases of highly cellular leiomyoma, a benign morphologic mimic of LGESS. Overall, evidence for the JAZF1-JJAZ1 fusion was found in 60% of endometrial stromal neoplasms analyzed (8/16 ESS and 4/4 stromal nodules). One LGESS demonstrated only rearrangement of 7p15 by FISH analysis and karyotypic analysis of this case showed t(6;7)(p21;p15). The fusion was not detected in any highly cellular leiomyomas. Our data suggest that the JAZF1-JJAZ1 fusion is a frequent, although nonuniform, feature of endometrial stromal neoplasia, irrespective of benign versus malignant classification and smooth muscle differentiation. In addition, the detection of the fusion by reverse transcriptase-polymerase chain reaction or FISH for JJAZ1 at 7p15 may be diagnostically useful.
Nucci
Marisa R
MR
Division of Molecular Oncology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA. mnucci@partners.org
Harburger
David
D
Koontz
Jason
J
Dal Cin
Paola
P
Sklar
Jeffrey
J
D002886:Chromosomes, Human, Pair 17; D002897:Chromosomes, Human, Pair 7; D056970:Co-Repressor Proteins; D004268:DNA-Binding Proteins; D036821:Endometrial Stromal Tumors / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D005260:Female; D050939:Gene Fusion; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D009363:Neoplasm Proteins / Q000235:genetics* / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D018203:Sarcoma, Endometrial Stromal / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism; D014178:Translocation, Genetic
D056970:Co-Repressor Proteins; D004268:DNA-Binding Proteins; C430460:JAZF1 protein, human; D009363:Neoplasm Proteins; C430461:SUZ12 protein, human; D014157:Transcription Factors