Estudio inmunohistoquímico de moléculas de adhesión en placentas de niños de bajo peso al nacer en el Hospital Universidad del Norte, Barranquilla (Colombia) / Immunohistochemical studies of adhesion molecules in placentas from low birth infants at Hospital Universidad of the Norte, Barranquilla (Colombia)

Objetivo: Observar la expresión de moléculas de adhesión VCAM-1, ICAM-1 en placentas de niños de bajo peso al nacer. Se estudiaron 21 placentas de pacientes atendidas en el Hospital Universidad del Norte en el periodo de mayo a diciembre de 2006. Materiales y métodos: Se realizó estudio macroscópico de las placentas: forma, peso, diámetro grosor, consistencia, color, olor. Para estudios microscópicos se realizaron 5 cortes de la placa corial, uno del rollo de membrana y otro del cordón umbilical. Los cortes fueron fijados en formol al 10 %, incluidos en parafina, coloreados con hematoxilia - eosina para estudios morfológicos. Para estudios inmunohistoquímicos se usaron anticuerpos mono-clonales Nova Castra para ICAM-1, VCAM-1, macrófagos. Resultados: Dieciocho placentas de forma redonda, 3 ovaladas; el peso varió entre 240 -400 gramos; 3 presentaron infarto en los cotiledones. En la micro 18 presentaron necrosis hialina de la media, hiperplasia de la intima, macrófagos xantomatosos, infiltrado linfoci-tario en tres. En la inmunohistoquímica se observó expresión de ICAM-1, VCAM-1, en la basal de las vellosidades coriales, en la basal de los vasos sanguíneos y macrófagos en el estroma conjuntivo Conclusiones: En dieciocho de los casos los cambios fueron compatibles con preeclampsia, tres con proceso virales. La expresión de moléculas de adhesión y macrófago en la inmunohistoquímica nos sugiere que estas moléculas son fundamentales en los proceso fisiopatológicos de la placenta.

Objective: To observe the expression of adhesion molecules VCAM -1, ICAM -1 in placentas of infants with low birthweight 21 placentas of patients treated at the University Hospital North in the period from May to December were studied 2006. Materials and methods: Macroscopic study of the placentas was performed; shape, weight, diameter, thickness, consistency, color, and odor: For five cuts microscopic studies chorionic plate, one membrane roll and another cord were performed. The sections were fixed in 10 % formalin, embedded in paraffin, stained with hematoxylin-eosin for morphological studies. For immunohistochemical studies monoclonal antibodies were used castra nova for ICAM1, VCAM1, macrophages. Results: 18 placentas round, three oval, the various weight between 240-400 grams, 3 had infarction in the cotyledons. In the micro 18 presented hyaline medial necrosis, hyperplasia of the intima, xanthomatous macrophages, lymphocytic infiltrate in three . In the immunohistochemical expression of ICAM-1, VCAM-1 was observed in the basal of chorionic villi in the basal blood vessel and macrophages in stroma. Conclusions: cases changes are compatible with pre -eclampsia, three viral process. The expression of adhesion molecules and macrophage in immunohistochemistry suggests that these molecules are critical in the pathophysiological process of the placenta.

Análisis de los factores inmunohistopatológicos (receptores hormonales, estrógenos, progesterona y ERB-2) asociados al pronóstico del cáncer de mama en la población de Barranquilla (2004- 2005) / Analysis of the immunohistopathological factors (hormonal receptors, estrogen, progesterone and ERB-2) associated to the prognosis of breast cancer in the population from Barranquilla (2004- 2005)

Objectives: To study the patterns of expression of the estrogen, progestagens and erb-2 receptors in 85 patients attended in two pathology laboratories from Barranquilla, from July 2004 to December 2005. Material and methods: This is a descriptive study of cohort. 104 cases were reviewed and 18 were excluded by lack of data. Inmunohistochemistry studies with techniques ofperoxidase - antiperoxidase were made, for which Dako monoclonals antibodies against estrogens, progestagens and ebr-2 were used. Results: Four neoplasias were classified as carcinoma in situ, one mesenquimal cancer, one lobulillar carcinoma and the others were infiltrating ductal carcinomas grade I, II and III.The immunohistochemistry studies showed positivity for estrogens and progestagen at the intracellular level in 73 cases and negativity to erb-2, 11 were negative for both estrogen and progestagen and one was positive to ebr-2. Conclusions: 1.The infiltrating ductal carcinoma grades II and III were the histological presentation that appears most frequently (80) cases. 2. 88.03 percent of the cases were positive for estrogens and progestagens. 3. The relation between the histological component and the hormonal receptors positivity, suggests a good prognosis.