RESUMEN
OBJECTIVES: To detect whether signs of oxidative stress appear at early stages of colorectal adenocarcinoma (CRC), particularly in the polyp stage. We also aimed to evaluate the specific entities myeloperoxidase (MPO) and oxidized low-density lipoprotein (oxLDL) as novel markers of oxidation in the plasma of patients with CRC and to study the relationship between oxidative status in plasma and patient survival. METHODS: We assayed serum or plasma specimens from healthy control subjects (n = 14), from patients with intestinal polyps (n = 39), and from patients with CRC (n = 128) to calculate the modified oxidative balance score (MOBS) using several serum markers (ß-carotene, lycopene, vitamin A, vitamin E, MPO, and oxLDL). We also assayed the levels of C-reactive protein (CRP) and obtained lipid profiles. Finally, we studied the survival of patients in relationship to oxidative status (antioxidants and pro-oxidants) and inflammation markers, and added theses data to the lipid profile for each patient. RESULTS: Oxidative stress levels increased as disease stage advanced. This increase was detected early in the polyp stage, before polyps progressed to cancer, and could be measured by the increase of such new markers as MPO and oxLDL, the decrease in antioxidants, and the MOBS value. Higher levels of oxidation correlated with lower survival. CONCLUSION: The oxidation process, which can cause mutations leading to CRC, begins development in the polyp stage. This process may be detected early by monitoring serum markers such as MPO and oxLDL.
Asunto(s)
Poliposis Adenomatosa del Colon/sangre , Poliposis Adenomatosa del Colon/diagnóstico , Neoplasias Colorrectales/sangre , Neoplasias Colorrectales/diagnóstico , Detección Precoz del Cáncer , Lipoproteínas LDL/sangre , Peroxidasa/sangre , Anciano , Anciano de 80 o más Años , Análisis de Varianza , Proteína C-Reactiva/metabolismo , Estudios de Cohortes , Femenino , Humanos , Masculino , Persona de Mediana EdadRESUMEN
UNLABELLED: Forty-eight children with sepsis were studied. Interleukin-13 (IL-13) levels were lower in patients who died at admission (p=0.014) and at 6 h (p=0.037), and in patients with refractory shock at 0 (p=0.03) and particularly at 6 h (p=0.0009). IL-13 levels did not correlate with other cytokines (IL-1b, IL-10, IL-12, TNFr), CRP or neutrophil count. Low IL-13 levels in the early hours of sepsis are associated with poor prognosis. CONCLUSION: IL-13, a Th-2 cytokine fundamental in the pathogenesis of atopy, might also have a protective role against severe infections in children.