Involvent of the NF-kB/p50/Bcl-3 complex in response to antiangiogenic therapy in a mouse model of metastatic renal cell carcinoma

BRAGA, MARINA de S.PAIVA, KATIUCIA B. daFOGUER, KARENCHAVES, KAREN C.B.LIMA, LARISSA de S.SCAVONE, CRISTOFOROBELLINI, MARIA H.2015-01-152015-01-152014BRAGA, MARINA de S.; PAIVA, KATIUCIA B. da; FOGUER, KAREN; CHAVES, KAREN C.B.; LIMA, LARISSA de S.; SCAVONE, CRISTOFORO; BELLINI, MARIA H. Involvent of the NF-kB/p50/Bcl-3 complex in response to antiangiogenic therapy in a mouse model of metastatic renal cell carcinoma. <b>Biomedicine and Pharmacotherapy</b>, v. 68, p. 873-879, 2014. DOI: <a href="https://dx.doi.org/10.1016/j.biopha.2014.07.008">10.1016/j.biopha.2014.07.008</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/23255.0753-3322http://repositorio.ipen.br/handle/123456789/23255Renal cell carcinoma (RCC) represents approximately 2–3% of human malignancies. Nuclear transcription factor kB (NF-kB) is composed of a family of transcription factors that have been associated with the development and progression of RCC. Endostatin (ES) is a fragment of collagen XVIII that possesses antiangiogenic activity. In this study, we evaluated the expression of NF-kB in metastatic tumor cells from animals treated with ES. Balb/c-bearing Renca-EGFP cells were treated with NIH/3T3- LendSN or NIH/3T3-LXSN cells as a control. At the end of the in vivo experiment, plasma Renca-EGFPsorted cells and tissue lung samples were collected. A real-time PCR array for NF-kB target genes revealed that ES therapy led to down regulation of Bcl-3 (P < 0.031), NF-kB1 (P < 0.001) and c-Rel (P < 0.004) in the ES-treated group. Using an electrophoretic mobility shift assay (EMSA), we observed a reduction in NF-kB binding activity in ES-treated Renca-EGP cells. Furthermore, a supershift assay showed a clear shift of the NF-kB DNA band in samples incubated with a p50 antibody. By immunohistochemistry analysis, ES treatment resulted in a significant reduction in expression of p50. (ES vs. control P < 0.05). The immunoprecipitation experiments confirmed the presence of a p50/Bcl-3 complex in nuclear extracts from cells of metastatic lung tissues. Our findings indicate that p50 and Bcl-3 plays a regulatory role in gene transcription in RCC.873-879openAccesskidneyscarcinomasendotheliumgrowth factorsgene therapymetastasesbiological modelsbiological indicatorsratsInvolvent of the NF-kB/p50/Bcl-3 complex in response to antiangiogenic therapy in a mouse model of metastatic renal cell carcinomaArtigo de periódico6810.1016/j.biopha.2014.07.008https://orcid.org/0000-0003-2852-6189