RESUMEN
The aim of our study was to assess the value of Elastic stain in the diagnosis of venous invasion (VI) in colonic adenocarcinoma. MATERIAL AND METHODS: All patients who undergone surgery for colonic adenocarcinoma at the University Hospital of Amiens, between 2004 and 2007, were included. Hematein-phloxin-saffron (HPS) stained slides of colectomy specimens were reviewed by two pathologists. Tumor blocks were stained with Elastic Stain (Roche - Ventana®). The presence or absence of VI, their number and localization were correlated with overall survival. RESULTS: Two hundred and thirty-one cases were investigated and 3274 slides were examined. VI were more often diagnosed by Elastic Stain than HPS stain (66% vs. 40%). Ninety percent of VI were revealed within the first 6 HPS slides, and from the first 5 in Elastic Stain. The presence of VI revealed by Elastic Stain and/or HPS was significantly associated with decreased overall survival in multivariate analysis (P=0.029), especially for stage IIA tumors (P=0.016). Tumor differentiation (P=0.006) and pTNM stage (P=0.001) were also independent prognostic factors. The localization and the number of VI were not prognostic factors. CONCLUSION: Our study confirms the prognostic value of VI, revealed by an elastic stain, in colonic adenocarcinoma. A systematic elastic stain of all tumor blocks (number at least 5) could be considered in the future, during pathological examination of colectomy for adenocarcinoma.
Asunto(s)
Adenocarcinoma/patología , Neoplasias del Colon/patología , Tejido Elástico/ultraestructura , Invasividad Neoplásica/patología , Coloración y Etiquetado/métodos , Venas/patología , Adenocarcinoma/mortalidad , Adenocarcinoma/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Colectomía , Neoplasias del Colon/mortalidad , Neoplasias del Colon/cirugía , Colorantes , Manejo de la Enfermedad , Femenino , Fluoresceínas , Hematoxilina/análogos & derivados , Humanos , Estimación de Kaplan-Meier , Masculino , Persona de Mediana Edad , Metástasis de la Neoplasia , Recurrencia Local de Neoplasia/epidemiología , Estadificación de Neoplasias/métodos , Compuestos Orgánicos , Pronóstico , Estudios Retrospectivos , Riesgo , Manejo de EspecímenesRESUMEN
Colon adenocarcinoma is one of the most common cancers worldwide, and resistance to current therapeutic modalities is a serious drawback in its treatment. Auraptene is a natural coumarin with considerable anticancer effects. The goal of this study was to introduce a novel combinatorial approach for treatment against colon adenocarcinoma cells. To do so, HT29 cells were pretreated with nontoxic auraptene and then hyperthermia was induced. Afterwards, the viability of the cells was assessed, changes induced in the cell cycle were analyzed, and the expression patterns of candidate genes were studied. Results from the MTT assay demonstrated significant (p < 0.01) decreases in cell viability when 20 µg/mL auraptene was used for 72 h, heat shock was induced, and cells were allowed to recover for 24 h. Flow cytometry analysis also indicated considerable changes in the distribution of cells between the sub-G1/G1 and G2/M phases of cell cycle after the combinatorial treatment. Real-time RT-PCR studies revealed significant (p < 0.01) up-regulation of P21 in the cells pretreated with auraptene after heat shock, whereas no significant change was observed in HSP27 expression. Our findings not only indicate, for the first time, that the efficacy of hyperthermia was improved by auraptene pretreatment, but also suggest that this coumarin could be used in the future to achieve more effective therapeutic outcomes.