Expression of a candidate gene for the gonadoblastoma locus in gonadoblastoma and testicular seminoma.
The gonadoblastoma locus on the Y chromosome (GBY) predisposes the dysgenetic gonads of XY females to develop in situ tumors. It has been mapped to a critical interval on the short arm and adjacent centromeric region on the Y chromosome. Currently there are five functional genes identified on the GBY critical region, thereby providing likely candidates for this cancer predisposition locus. To evaluate the candidacy of one of these five genes, testis-specific protein Y-encoded (TSPY), as the gene for GBY, expression patterns of TSPY in four gonadoblastoma from three patients were analyzed by immunohistochemistry using a TSPY specific antibody. Results from this study showed that TSPY was preferentially expressed in tumor germ cells of all gonadoblastoma specimens. Additional study on two cases of testicular seminoma demonstrated that TSPY was also abundantly expressed in all stages of these germ cell tumors. The present observations suggest that TSPY may either be involved in the oncogenesis of or be a useful marker for both types of germ cell tumors.
Lau
Y
Y
Department of Medicine, VA Medical Center, University of California, San Francisco CA, USA. clau@itsa.ucsf.edu
Chou
P
P
Iezzoni
J
J
Alonzo
J
J
Kömüves
L
L
D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins / Q000032:analysis / Q000235:genetics*; D005260:Female; D015870:Gene Expression; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005838:Genotype; D005854:Germ Cells / Q000737:chemistry / Q000378:metabolism / Q000473:pathology; D018238:Gonadoblastoma / Q000737:chemistry / Q000235:genetics* / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009030:Mosaicism / Q000235:genetics; D009363:Neoplasm Proteins / Q000032:analysis / Q000235:genetics; D009687:Nuclear Proteins; D010641:Phenotype; D018239:Seminoma / Q000737:chemistry / Q000235:genetics* / Q000473:pathology; D051876:Sex-Determining Region Y Protein; D013736:Testicular Neoplasms / Q000737:chemistry / Q000235:genetics* / Q000473:pathology; D014157:Transcription Factors; D014998:Y Chromosome / Q000235:genetics*
D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins; D009363:Neoplasm Proteins; D009687:Nuclear Proteins; D051876:Sex-Determining Region Y Protein; C497749:TSPY1 protein, human; D014157:Transcription Factors