PMID- 19912575 OWN - NLM STAT- MEDLINE DCOM- 20100618 LR - 20100303 IS - 1399-0039 (Electronic) IS - 0001-2815 (Linking) VI - 75 IP - 2 DP - 2010 Feb TI - Higher HLA class I expression in renal cell carcinoma than in autologous normal tissue. PG - 110-8 LID - 10.1111/j.1399-0039.2009.01409.x [doi] AB - A total of 93 frozen primary renal cell carcinoma (RCC) samples and 31 frozen samples of corresponding normal renal tissue were analyzed for human leukocyte antigen (HLA) class I and HLA-DR expression. Unexpectedly, HLA class I expression was much higher on RCC cells than on normal renal tubular cells. Immunohistochemistry analysis of frozen and paraffin-embedded tissue samples, applying an extended panel of specific anti-HLA monoclonal antibodies, showed elevated HLA class I antigen expression in 95.6% of the tumors vs only 12.9% of normal renal tissues. These findings were confirmed by molecular analysis of HLA heavy chain and beta2-microglobulin (beta2m) transcription levels using quantitative real-time polymerase chain reaction (PCR) on microdissected tissue samples (isolated tumor nests and autologous normal renal tubules) from four patients. These results might help to explain the relatively high success rate of immunotherapy in patients with RCC. The molecular mechanism underlying the increased HLA class I expression in RCC has yet to be elucidated. FAU - Saenz-Lopez, P AU - Saenz-Lopez P AD - Servicio de Analisis Clinicos, Hospital Universitario Virgen de las Nieves, Granada, Spain. FAU - Gouttefangeas, C AU - Gouttefangeas C FAU - Hennenlotter, J AU - Hennenlotter J FAU - Concha, A AU - Concha A FAU - Maleno, I AU - Maleno I FAU - Ruiz-Cabello, F AU - Ruiz-Cabello F FAU - Cozar, J M AU - Cozar JM FAU - Tallada, M AU - Tallada M FAU - Stenzl, A AU - Stenzl A FAU - Rammensee, H-G AU - Rammensee HG FAU - Garrido, F AU - Garrido F FAU - Cabrera, T AU - Cabrera T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20091113 PL - England TA - Tissue Antigens JT - Tissue antigens JID - 0331072 RN - 0 (HLA-DR Antigens) RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Carcinoma, Renal Cell/genetics/*immunology/*pathology MH - HLA-DR Antigens/biosynthesis/*genetics/immunology MH - Histocompatibility Antigens Class I/*analysis/genetics/immunology MH - Humans MH - Immunohistochemistry MH - Kidney/chemistry/immunology MH - Kidney Neoplasms/genetics/*immunology/*pathology MH - Leukocytes/chemistry/immunology/pathology MH - Paraffin Embedding EDAT- 2009/11/17 06:00 MHDA- 2010/06/19 06:00 CRDT- 2009/11/17 06:00 PHST- 2009/11/17 06:00 [entrez] PHST- 2009/11/17 06:00 [pubmed] PHST- 2010/06/19 06:00 [medline] AID - TAN1409 [pii] AID - 10.1111/j.1399-0039.2009.01409.x [doi] PST - ppublish SO - Tissue Antigens. 2010 Feb;75(2):110-8. doi: 10.1111/j.1399-0039.2009.01409.x. Epub 2009 Nov 13.