Expression of PAX8 in normal and neoplastic renal tissues: an immunohistochemical study

被引:187
|
作者
Tong, Guo-Xia [1 ]
Yu, Woojin M. [1 ]
Beaubier, Nike T. [1 ]
Weeden, Erin M. [1 ]
Hamele-Bena, Diane [1 ]
Mansukhani, Mahesh M. [1 ]
O'Toole, Kathleen M. [1 ]
机构
[1] Columbia Univ, Coll Phys & Surg, Dept Pathol, New York, NY 10032 USA
关键词
PAX8; renal epithelial tumors; urothelial carcinoma; immunohistochemistry; TRANSCRIPTION FACTOR-I; CELL CARCINOMA MARKER; PAIRED BOX GENE; DIFFERENTIAL-DIAGNOSIS; THYROID-HORMONE; NEPHRON DIFFERENTIATION; EPITHELIAL NEOPLASMS; DEVELOPING KIDNEY; RELIABLE MARKER; PAX8(-/-) MICE;
D O I
10.1038/modpathol.2009.88
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Cell-lineage-specific transcription factors are a group of regulatory proteins expressed in embryonic, differentiated, or neoplastic cells of the same lineage and represent a valuable repertoire of tissue-specific markers for the diagnosis of human tumors. Together with PAX2, PAX8 is a nephric-lineage transcription factor and is required for the establishment of renal-lineage cells and the formation of the kidney. In contrast to PAX2, little is known about the expression of PAX8 in adult kidney and renal tumors. In this study, we used immunohistochemistry to investigate the expression of PAX8 in adult human kidney and renal epithelial tumors. We report here that PAX8 was detected in renal epithelial cells in all segments of renal tubules from the proximal tubules to the renal papillae and in the parietal cells of Bowman's capsule in the adult kidney. PAX8 was also present in 98% of clear cell renal cell carcinomas (RCCs), 90% of papillary RCCs, and 95% of oncocytomas, similar to PAX2. In addition, PAX8 was found in 82% of chromophobe RCCs, 71% of sarcomatoid components of RCCs, and 100% (2/2) of renal medullary carcinomas. Overall, PAX8 was detected in 85% of metastatic renal tumors. Interestingly, expression of PAX8 was noted in some urothelial cells in the renal pelvis and ureters and B23% of urothelial carcinomas of the renal pelvis, but not in the urothelium or urothelial carcinomas of the urinary bladder; this probably underlines the different embryonic origins of urothelial cells in the upper and lower urinary tracts. As shown in this study, PAX8 is widely expressed in normal and neoplastic renal tissues. PAX8 may be a useful additional marker for renal epithelial tumors; however, its specificity and sensitivity await further investigation. Modern Pathology (2009) 22, 1218-1227; doi:10.1038/modpathol.2009.88; published online 12 June 2009
引用
收藏
页码:1218 / 1227
页数:10
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