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| Souza,A.C.M.F.; Souza,D.R.V.; Sanabani,S.S.; Giorgi,R.R.; Bendit,I.. |
| Amplification of the MYCN gene in neuroblastomas is a potent biological marker of highly aggressive tumors, which are invariably fatal unless sound clinical management is applied. To determine the usefulness of semi-quantitative differential PCR (SQ-PCR) for accurate quantification of MYCN gene copy number, we evaluated the analytical performance of this method by comparing the results obtained with it for 101 tumor samples of neuroblastoma to that obtained by absolute and relative real-time PCR. Similar results were obtained for 100 (99%) samples, no significant difference was detected between the median log10 MYCN copy number (1.53 by SQ-PCR versus 1.55 by absolute real-time PCR), and the results of the two assays correlated closely (r = 0.8, Pearson... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Neuroblastoma; Semi-quantitative PCR; Real-time PCR; MYCN; Amplification. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000900004 |
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| Murat,C.B.; Braga,P.B.S.; Fortes,M.A.H.Z.; Bronstein,M.D.; Corrêa-Giannella,M.L.C.; Giorgi,R.R.. |
| The tumorigenesis of pituitary adenomas is poorly understood. Mutations of the PIK3CA proto-oncogene, which encodes the p110-α catalytic subunit of PI3K, have been reported in various types of human cancers regarding the role of the gene in cell proliferation and survival through activation of the PI3K/Akt signaling pathway. Only one Chinese study described somatic mutations and amplification of the PIK3CA gene in a large series of pituitary adenomas. The aim of the present study was to determine genetic alterations of PIK3CA in a second series that consisted of 33 pituitary adenomas of different subtypes diagnosed by immunohistochemistry: 6 adrenocorticotropic hormone-secreting microadenomas, 5 growth hormone-secreting macroadenomas, 7 prolactin-secreting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pituitary adenomas; PIK3CA proto-oncogene; Genomic amplification; Somatic mutation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000900009 |
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