Exogenous normal lymph alleviates lipopolysaccharide-induced acute lung injury through lessening the adhesion molecules

PURPOSE: To evaluate the role of exogenous normal lymph (ENL) on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in rats. METHODS: ALI was induced by the jugular vein injection of LPS (iv, 15 mg/kg) in rats of the LPS and LPS+ENL groups within 15 min, then, ENL without cell components (5 ml/kg) was infused at the speed of 0.5 ml per minute in the LPS+ENL group, the same amount of saline was administered in the LPS group. The rats in the sham group received the same surgical procedure and saline. The histomorphology and the levels of P-selectin, intercellular adhesion molecule-1 (ICAM-1), myeloperoxidase (MPO) in pulmonary tissue were assessed. RESULTS: LPS induced pulmonary injury as well as increased the wet/dry weight ratio (W/D) and the levels of P-selectin, ICAM-1, and MPO in pulmonary tissues. These deleterious effects of LPS were significantly ameliorated by ENL treatment. CONCLUSION: Exogenous normal lymph could markedly alleviate the acute lung injury induced by lipopolysaccharide, and its effects might be related to lessening the adhesion molecules. .

Mesenteric lymph reperfusion exacerbates spleen injury caused by superior mesenteric artery occlusion shock

The intestinal lymph pathway plays an important role in the pathogenesis of organ injury following superior mesenteric artery occlusion (SMAO) shock. We hypothesized that mesenteric lymph reperfusion (MLR) is a major cause of spleen injury after SMAO shock. To test this hypothesis, SMAO shock was induced in Wistar rats by clamping the superior mesenteric artery (SMA) for 1 h, followed by reperfusion for 2 h. Similarly, MLR was performed by clamping the mesenteric lymph duct (MLD) for 1 h, followed by reperfusion for 2 h. In the MLR+SMAO group rats, both the SMA and MLD were clamped and then released for reperfusion for 2 h. SMAO shock alone elicited: 1) splenic structure injury, 2) increased levels of malondialdehyde, nitric oxide (NO), intercellular adhesion molecule-1, endotoxin, lipopolysaccharide receptor (CD14), lipopolysaccharide-binding protein, and tumor necrosis factor-α, 3) enhanced activities of NO synthase and myeloperoxidase, and 4) decreased activities of superoxide dismutase and ATPase. MLR following SMAO shock further aggravated these deleterious effects. We conclude that MLR exacerbates spleen injury caused by SMAO shock, which itself is associated with oxidative stress, excessive release of NO, recruitment of polymorphonuclear neutrophils, endotoxin translocation, and enhanced inflammatory responses.

Piroxicam-zinco: cinética em sangue e linfa e efeito na mucosa gástrica / Zinc-piroxicam: kinetic in blood and lymph and effect on the gastric mucosa

Vários mecanismos foram propostos para reduzir a toxicidade gástrica dos fármacos antiinflamatórios. A complexação com zinco foi proposta considerando-se o fato de que o zinco possui ação protetora sobre a mucosa gástrica. O complexo piroxicam-zinco apresenta atividade antiinflamatória e analgésica semelhantes às do fármaco livre. No entanto, a modificação de propriedades físico-químicas acarretou alteração do perfil cinético do fármaco. A fim de investigar as diferenças farmacocinéticas, o complexo piroxicam-zinco foi estudado quanto à farmacocinética em sangue e linfa de ratos. Estudaram-se também os efeitos do complexo na mucosa gástrica em comparação com o piroxicam livre em modelos de úlcera induzida por ácido acetilsalicílico e por etanol...

Correlación entre ploidia y fase S, y características morfológicas y receptores hormonales en el cáncer de mama: estudio de 402 casos / Correlation between ploidy and S phase faction and morphological characteristic and hormonal recepyor in breast cancer: study of 402 cases

Con la finalidad de establecer la relación entre ploidia, fase S y las características morfológicas del carcinoma de mama se estudiaron 402 muestras de material en fresco. No se encontro ninguna relación entre ploidia y fase S, y el status de los ganglios linfáticos y la edad de los pacientes. Las lesiones aneuploides resultaron de mayor tamaño que los tumores diploides y usualmente no expresaban receptores hormonales. Los carcinomas ductales infiltrantes (322/402) mostraron mayor porcentaje de lesiones aneuploides y una fase S más elevada en relación con el incremento del grado histológico, la formación de túbulos, el pleomorfismo nuclear y el índice mitótico. En el análisis multivariante, el plemorfismo nuclear y el tamaño tumoral constituyeron las únicas variables independientes y con valor de predicción para la aneuploidia. El patrón de ADN y la fase S constituyen variables que se correlacionan con los cambios morfológicos y así proporcionan información objetiva y reproducible

Interleucina-2 en pacientes con Síndromes Linfoproliferativos / Interleukin-2 in patients with lymphoproliferative syndromes

Se estudió la producción de interleucina-2 (IL-2) en las células mononucleares periféricas de controles normales y de pacientes con sídromes linfoproliferativos. Los valores normales de esta linfocina fueron: 31,74 ñ 18,25 µ/mL. Se encontró elevada en 3 pacientes con leucemia linfoide crónica de células B en estadio clínico III; disminuida en un paciente con linfoma no hodgkiniano y en otro con leucemia de células peludas; y ligeramente baja en pacientes con leucemia linfoide crónica en estadios clínicos O-II. No se encontró correlación entre los valores de IL-2 y la hemoglobina, el conteo global de leucocitos y la administración o no de tratamiento, pero se halló una correlación positiva con el conteo de linfocitos