@Article{Sulzyc-Bielicka2012,
journal="Polish Journal of Pathology",
issn="1233-9687",
volume="63",
number="2",
year="2012",
title="Colorectal cancers differ in respect of PARP-1 protein expression",
abstract="Recent findings raise the possibility of PARP inhibitor therapy in colorectal cancers (CRCs). However, the extent of PARP-1 protein expression in clinical specimens of CRC is not known. Using immunohistochemistry we assessed PARP-1 protein expression in tissue microarrays of 151 CRCs and its association with the patient’s age, sex, Astler-Coller stage, grade and site of the tumor. High PARP nuclear immunoreactivity was found in 68.2% (103/151) of all cases. In turn, 31.8% (48/151) of tumors showed low PARP expression, including 9 (6%) PARP-1 negative CRCs. There was a significant association of PARP-1 expression with the site of CRC and Astler-Coller stage. A high PARP expression was noted in 79.1% of colon vs. 53.9% of rectal tumors (p = 0.001). The mean PARP-1 score was 1.27 times higher in colon vs. rectal cancers (p = 0.009) and it was higher in stage B2 vs. stage C of CRCs   (p = 0.018). In conclusion, the level of PARP-1 protein nuclear expression is associated with the tumor site and heterogeneous across clinical specimens of CRC, with the majority of CRCs expressing a high level but minority – low or no PARP-1 expression. These findings may have a clinical significance because the assessment of PARP-1 expression in tumor samples may improve selection of patients with CRC for PARP inhibitor therapy.",
author="Sulzyc-Bielicka, Violetta
and Domagala, Pawel
and Hybiak, Jolanta
and Majewicz-Broda, Anna
and Safranow, Krzysztof
and Domagala, Wenancjusz",
pages="87--92",
url="https://www.termedia.pl/Colorectal-cancers-differ-in-respect-of-PARP-1-protein-expression,55,19057,1,1.html"
}