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Evaluation of HER2, p53, bcl-2, topoisomerase II-α, heat shock proteins 27 and 70 in primary breast cancer and metastatic ipsilateral axillary lymph nodes

Cardoso, F. ; Leo, A. Di ; Larsimont, D. ; Gancberg, D. ; Rouas, G. ; Dolci, S. ; Ferreira, F. ; Paesmans, M. ; Piccart, M.

Annals of oncology, 2001-05, Vol.12 (5), p.615-620 [Periódico revisado por pares]

Oxford: Oxford University Press

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Título:
Evaluation of HER2, p53, bcl-2, topoisomerase II-α, heat shock proteins 27 and 70 in primary breast cancer and metastatic ipsilateral axillary lymph nodes
Autor: Cardoso, F. ; Leo, A. Di ; Larsimont, D. ; Gancberg, D. ; Rouas, G. ; Dolci, S. ; Ferreira, F. ; Paesmans, M. ; Piccart, M.
Assuntos: Adult ; Antigens, Neoplasm ; Biological and medical sciences ; biological markers ; Biomarkers, Tumor - analysis ; breast cancer ; Breast Neoplasms - genetics ; Breast Neoplasms - pathology ; Databases, Factual ; DNA Topoisomerases, Type II - biosynthesis ; DNA Topoisomerases, Type II - genetics ; DNA-Binding Proteins ; Female ; Gene Expression Regulation, Neoplastic ; Genes, erbB-2 - genetics ; Gynecology. Andrology. Obstetrics ; HSP70 Heat-Shock Proteins - biosynthesis ; HSP70 Heat-Shock Proteins - genetics ; Humans ; Lymphatic Metastasis - diagnosis ; Mammary gland diseases ; Medical sciences ; metastatic lymph node ; Poly-ADP-Ribose Binding Proteins ; Predictive Value of Tests ; primary tumour ; Prognosis ; Proto-Oncogene Proteins c-bcl-2 - biosynthesis ; Proto-Oncogene Proteins c-bcl-2 - genetics ; Sensitivity and Specificity ; Tumor Suppressor Protein p53 - biosynthesis ; Tumor Suppressor Protein p53 - genetics ; Tumors
É parte de: Annals of oncology, 2001-05, Vol.12 (5), p.615-620
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Descrição: Background: Breast cancer is a heterogeneous disease. Predictive biological markers (BM) of responsiveness to therapy need to be identified. Evaluation of BM is mainly done at the primary site. However, in the adjuvant therapy of breast cancer, the main goal is control of micrometastases. It is still unknown whether heterogeneity in the expression of BM between the primary site and its micrometastases exists. Objective: To evaluate the expression of some BM with potential predictive value from the primary breast cancer site and metastatic ipsilateral axillary lymph nodes. Patients and methods: Focality (percentage of positive cells) and intensity staining scores were evaluated for each marker. Freshly cut sections (4 μm) from embedded blocks of breast cancer fixed in formalin or bouin were put onto superfrost slides (Menzel—Gläser). Protein expression was evaluated immunohistochemically (IHC) using monoclonal antibodies against: topo II-α (clone K1SI, 1 μg/ml, Roche) with a trypsine pre-treatment (P); HSP27 (clone G3.1, 1/60, Biogenex), HSP70 (clone BRM.22, 1/80, Biogenex) and HER2 (clone CBII, 1/40, Novocastra; without P); p53 (clone D07, 1/750, Dako) and bcl-2 (clone 124, 1/60, Dako) with citrate buffer as P. Results: Overall, the percentage of discordant marker status in the primary tumour and its metastatic lymph nodes was 2% for HER2, 6% for p53, 15% for bcl-2, 19% for topoisomerase II-α, 24% for HSP27 and 30% for HSP70. For the subgroup of patients with positive BM in the primary tumour, the percentage of discordance was 6% for HER2. 7% for p53, 14% for bcl-2, 19% for HSP70, 21% for topoisomerase II-α and 36% for HSP27. For the subgroup of patients with positive BM in the lymph nodes, the percentage of discordance was 9% for bcl-2, 15% for HER2 and p53, 21% for topoisomerase II-α, 22% for HSP27 and 25% for HSP70. Conclusions: 1) No biological marker had 100% concordant results. 2) Although some discordant cases might be explained by the limitations of the IHC technique, future studies aiming to evaluate the predictive value of BM in the adjuvant therapy of breast cancer should take into account a possible difference in BM expression between the primary and the metastatic sites.
Editor: Oxford: Oxford University Press
Idioma: Inglês

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Evaluation of HER2, p53, bcl-2, topoisomerase II-α, heat shock proteins 27 and 70 in primary breast cancer and metastatic ipsilateral axillary lymph nodes

Cardoso, F. ; Leo, A. Di ; Larsimont, D. ; Gancberg, D. ; Rouas, G. ; Dolci, S. ; Ferreira, F. ; Paesmans, M. ; Piccart, M.

Oxford: Oxford University Press

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