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Updated: May 23, 2026

The Use of Reverse Phase Protein Arrays (RPPA) to Explore Protein Expression Variation within Individual Renal Cell Cancers
Published on: January 22, 2013
[Pax-2 antigen expression in kidney tumours]
Jelena M Vjestica1, Jasmina Marković-Lipkovski, Cane D Tulić
1Institut za patologiju, Beograd.
Unlabelled:
Pax-2 transcriptional factor is expressed during kidney development and could re-express in renal tumors. The aim of this study was to examine Pax-2 expression in different types of renal cell carcinoma (RCC) in order to see whether it is good immunohistochemical marker.
Method:
We analyzed 48 different renal tumours stained with Pax-2 antibody. Pax-2 positive reaction was noticed in nucleus or cytoplasm. Expression of this antigen in tumours tissue was correlated with tumour stage and nuc-lear grade. Pax-2 expression between different histological RCC types was analyzed by chi2 test and Fishers test for two in-depended samples.
Results:
Pax-2 is expressed by a high percentage of re-nal tumors regardless of histologic type. Significant diffe-rence of Pax-2 expression between oncocytomas and chromofobe RCC was found.
Conclusion:
Nuclear expression of Pax-2 is useful diagnostic kidney tumour marker. Pax-2 showed stronger expression in lower malignancy kidney tumours and in oncocytomas, than in high grade RCC like in those with sarcomatoid differentiation

