In:
American Journal of Clinical Pathology, Oxford University Press (OUP), Vol. 156, No. Supplement_1 ( 2021-10-28), p. S109-S109
Abstract:
Uroplakin 1B (Upk1b) protein is relevant for stabilizing and strengthening epithelial cells that line the bladder. It helps to prevent urothelial cells from rupturing during bladder distension. Based on RNA expression studies Upk1b is expressed in a limited number of normal tissues. Methods/Case Report To comprehensively evaluate the potential diagnostic and prognostic utility of Upk1b expression analysis, a tissue microarray containing 15,182 samples from 127 different tumor types and subtypes and 608 samples of 76 different normal tissue types was analyzed by immunohistochemistry. Results (if a Case Study enter NA) Upk1b positivity was found in 61 (48%) different tumor types including 50 (39%) with at least one moderately positive and 39 tumor types (31%) with at least one strongly positive tumor. The highest positivity rate and the highest levels of expression was found in urothelial neoplasms (58-95%), Brenner tumors of the ovary (92%), epitheloid mesothelioma (87%), serous carcinomas of the ovary (58%) and the endometrium (53%) as well as squamous cell carcinomas of various sites of origin. Immunostaining was infrequent in lung adenocarcinoma (0%) and largely absent in colorectal (0.7%) or prostatic adenocarcinoma (1.3%). In urothelial tumors cancer, low Upk1b expression was linked to high grade and invasive tumor growth (p & lt;0.0001 each) as well as nodal metastasis (p=0.0006) but an unequivocal link to unfavorable tumor features was lacking in various other tumor entities. Conclusion In conclusion, the differential Upk1b expression in different tumor entities suggests potential diagnostic applications of Upk1b immunohistochemistry in panels for the distinction of malignant mesothelioma from adenocarcinoma of the lung, urothelial carcinoma from prostatic adenocarcinoma in the bladder, or pancreatico-biliary and gastro-esophageal from colorectal adenocarcinomas.
Type of Medium:
Online Resource
ISSN:
0002-9173
,
1943-7722
DOI:
10.1093/ajcp/aqab191.232
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2021
detail.hit.zdb_id:
2039921-2
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