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Master's Dissertation
DOI
https://doi.org/10.11606/D.17.2008.tde-24042012-144303
Document
Author
Full name
Alexandre Pavan Garieri
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2008
Supervisor
Committee
Marana, Heitor Ricardo Cosiski (President)
Andrade, Jurandyr Moreira de
Murta, Eddie Fernando Candido
Title in Portuguese
Produção de VEGF e HIF-1? em pacientes com carcinoma de mama localmente avançado submetidas à quimioterapia neoadjuvante.
Keywords in Portuguese
Carcinoma de mama localmente avançado
HIF-1?.
Quimioterapia neoadjuvante
VEGF
Abstract in Portuguese
Determinar o valor prognóstico e preditivo do VEGF (vascular endothelial growth factor) e do HIF-1? (Hypoxia-inducible factor-1) em relação à sobrevida livre de doença (SLD) e sobrevida global (SG) em pacientes com carcinoma de mama localmente avançado (CMLA) tratadas primariamente pela quimioterapia neoadjuvante. MATERIAIS E METODOS: VEGF e HIF foram quantificados consecutivamente em plasma de 36 pacientes com CMLA pelo método de ELISA (enzyme labeling immunoassay absorbant) para o VEGF165 e o HIF-1?. O tratamento neoadjuvante foi realizado em todas as pacientes com docetaxel e epirrubicina. O tempo médio de seguimento foi de 56 meses. RESULTADOS: Uma análise univariada demonstrou que o HIF-1? está significantemente relacionado à SLD (P =.0238) e à SG (P = .0121) com as pacientes HER-2 positivas. Não houve diferença significante para a SLD ou SG no que diz respeito aos receptores de hormônio, comprometimento axilar ou grau tumoral. Os valores de VEGF foram maiores no grupo de pacientes RE+ do que no grupo RE negativo (P =.01). Inversamente os valores de HIF-1? foram menores no grupo RE+ comparados ao grupo RE - (P =.02). Pacientes com recorrência óssea apresentaram uma tendência a apresentarem valores de VEGF menores (media, 175.7 pg/ml) do que aquelas com recorrência visceral (441 pg/ml). Uma análise multivariada demonstrou o comprometimento axilar (P =.0004), receptores de estrógeno (ER) (P < .0001), e tamanho do tumor (P = .0085) como fatores independentes de SLD. O HIF-1? foi tido como um fator independente preditivo de SG (P =.0180). Não houve diferença estatisticamente significante entre os valores plasmáticos de HIF-1? ou VEGF nos períodos pré e pós quimioterapia. CONCLUSÕES: Os resultados sugerem que o nível plasmático do HIF-1? é preditivo de SLD e SG nas pacientes com CMLA apresentando uma sobreposição as pacientes HER-2 positivas. As dosagens de VEGF podem ser preditivas de resposta e prognóstico no tratamento neoadjuvante, mas são necessários novos estudos prospectivos comparados ao HIF-1? para conclusões mais consistentes.
Title in English
Production of VEGF and HIF-1? in patients with locally advanced breast cancer primarily submitted to neoadjuvant chemotherapy.
Keywords in English
HIF-1?.
Locally advanced breast cancer
neoadjuvant chemotherapy
VEGF
Abstract in English
To determine the predictive and prognostic value of vascular endothelial growth factor (VEGF) and Hypoxia-inducible factor-1 (HIF-1?) for relapse-free survival (RFS) and overall survival (OS) in locally advanced breast cancer (LABC) primarily submitted to neoadjuvant chemotherapy. MATERIALS AND METHODS: VEGF and HIF were quantitatively measured in plasma sample from 36 consecutive patients with LABC using an enzyme immunoassay for human VEGF165 and HIF-1?. Neoadjuvant treatment was given to all patients as docetaxel and epirrubicin. The follow-up median time was 56 months. RESULTS: Univariate analysis showed that HIF-1? is a significant predictor of RFS ( P = .0238) and OS (P = 0121) in HER-2 positive patients. No significant difference was seen in RFS or OS related to hormonal receptor, axillary status or tumoral grade. The VEGF level was higher in the group of patients who ER was positive than ER negative (P = .01). On the other hand, the HIF-1? level is higher in ER negative patients than ER positive ( P=.02). Patients with bone recurrences tended to have lower VEGF plasma level (median, 175.7 pg/ml) than patients with visceral metastasis (441 pg/ml). Multivariate analysis showed nodal status (P = .0004), estrogen receptor (ER) status (P < .0001), and tumor size (P = .0085) to be independent predictors of RFS. HIF-1? was found to be an independent predictor of OS (P = .0180). No statistically differences were observed related to pre and post chemotherapy period in HIF-1? or VEGF measurements. CONCLUSION: The results suggest that high level of plasma HIF-1? is associated to HER-2 over expression and they are major predictive factors of RFS and OS in LABC. VEGF content might also predict outcome after neoadjuvant treatment, however further studies in a prospective setting with HIF-1? homologous treatments are required.
 
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Publishing Date
2013-02-06
 
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