Atherosclerosis is a chronic inflammatory disease that is caused by the accumulation of LDL particles in the intima, causing the activation of immune cells and triggering an inflammatory response. LPS is a potent activator of the innate immune response and it can be transported by lipoproteins. Since humans are much more sensitive to LPS than other mammals, and very low amounts of LPS can elicit an immune response, the aim of this study is to characterize the distribution of LPS and its immunogenic portion (3OHFAs) among lipoprotein types of healthy men. We separated lipoprotein fractions by ultracentrifugation and the amount of each 3OHFA was measured by MS in each lipoprotein fraction to calculate LPS concentration. Lipoprotein particle concentration was measured by NMR. LDL and HDL fractions transported the highest concentration of LPS (35.7% and 31.5%, respectively), but VLDL particles carried more LPS molecules per particle (0.55 molecules/particle) than LDL or HDL (p < 0.01). The distribution of LPS and all 3OHFAs among lipoprotein fractions showed high interindividual variability, suggesting that they may be studied as a potential biomarker. This may help understand the role of LPS in atherosclerosis in those cases where the disease cannot be explained by traditional risk factors.

The case of an adolescent referred to the Huntington's Unit for psychiatric assessment is selected. Objectives: To make a differential diagnosis between the symptoms of juvenile Huntington's disease (JHD) and the usual behaviors of an adolescent. To present the complexity of the dividing line between neurological and psychiatric disease. To detail the clinical-epidemiological profile of the patients seen in the Functional Huntington's Disease Unit of reference. Se presenta el caso de un adolescente derivado a la Unidad de Huntington para valoración psiquiátrica. Objetivos: Realizar diagnóstico diferencial entre la sintomatología de la enfermedad de Huntington juvenil (EHJ) y las conductas propias de un adolescente; Presentar la complejidad de la línea de separación entre la enfermedad neurológica y psiquiátrica; Detallar el perfil clínico-epidemiológico de los pacientes atendidos en la Unidad Funcional de Enfermedad de Huntington de referencia.