Analysis of the local and systemic inflammatory response in hospitalized infants with respiratory syncitial virus bronchiolitis

BACKGROUND: Respiratory syncytial virus acute bronchiolitis (RSV-AB) is a major cause of hospital admission among our infants. The immune and inflammatory mechanisms involved in the RSV-AB and factors influencing severity have not been clearly established, although an imbalanced Th1 and Th2 response seems to be crucial. OBJECTIVES: To assess the local and systemic inflammatory response in RSV-AB. To find a possible marker of clinical severity and/or oxygen requirements. PATIENTS AND METHODS: Levels of nine cytokines were measured in nasopharyngeal aspirate (NPA) and peripheral blood (PB) of 45 infants with RSV-AB and 27 peer controls, including IFNγ, TNFα, VEGF, interleukins 4, 6 and 10, and chemokines (IL-8 and macrophage inflammatory proteins 1-α and 1-β). RESULTS: The levels of the analyzed cytokines and chemokines were significantly higher in the NPA of RSV-AB group, with a decrease in IL-4/IFNγ ratio. IL-6 and MIP-1β levels in NPA were directly correlated to oxygen therapy. PB showed an increase in IL-8 and a decrease in MIP-1α and MIP-1β in the RSV-AB group (only MIP-1β associated to the need for oxygen therapy). No correlation was found between cytokines and chemokines levels in NPA and PB. CONCLUSIONS: This study shows that RSV triggers an inflammatory response fundamentally at the respiratory level, with scant systemic repercussion. This local response is characterized by an increase in Th1 and Th2 cytokines, although with a relative predominance of Th1. The determination upon patient admission of IL-6 and MIP-1β levels in NPA, and of MIP-1β in PB could help predict severe forms and the need for oxygenotherapy

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Analysis of the local and systemic inflammatory response in hospitalized infants with respiratory syncitial virus bronchiolitis.

BACKGROUND: Respiratory syncytial virus acute bronchiolitis (RSV-AB) is a major cause of hospital admission among our infants. The immune and inflammatory mechanisms involved in the RSV-AB and factors influencing severity have not been clearly established, although an imbalanced Th1 and Th2 response seems to be crucial. OBJECTIVES: To assess the local and systemic inflammatory response in RSV-AB. To find a possible marker of clinical severity and/or oxygen requirements. PATIENTS AND METHODS: Levels of nine cytokines were measured in nasopharyngeal aspirate (NPA) and peripheral blood (PB) of 45 infants with RSV-AB and 27 peer controls, including IFNγ, TNFα, VEGF, interleukins 4, 6 and 10, and chemokines (IL-8 and macrophage inflammatory proteins 1-α and 1-ß). RESULTS: The levels of the analyzed cytokines and chemokines were significantly higher in the NPA of RSV-AB group, with a decrease in IL-4/IFNγ ratio. IL-6 and MIP-1ß levels in NPA were directly correlated to oxygen therapy. PB showed an increase in IL-8 and a decrease in MIP-1α and MIP-1ß in the RSV-AB group (only MIP-1ß associated to the need for oxygen therapy). No correlation was found between cytokines and chemokines levels in NPA and PB. CONCLUSIONS: This study shows that RSV triggers an inflammatory response fundamentally at the respiratory level, with scant systemic repercussion. This local response is characterized by an increase in Th1 and Th2 cytokines, although with a relative predominance of Th1. The determination upon patient admission of IL-6 and MIP-1ß levels in NPA, and of MIP-1ß in PB could help predict severe forms and the need for oxygenotherapy.

Hipercalcemia secundaria a una necrosis grasa subcutánea / Secondary hypercalcemia after subcutaneous fat necrosis

La necrosis grasa subcutánea (NGS) es una paniculitis autolimitada, que aparece generalmente en las primeras 4 semanas de vida, en recién nacidos a término con antecedentes de asfixia perinatal. Su evolución es favorable. El pronóstico es generalmente bueno, con regresión completa. Sin embargo, pueden surgir complicaciones, como la hipercalcemia, que incluso puede aparecer hasta 6 meses después del cuadro cutáneo, y es potencialmente mortal. Presentamos el caso de un neonato con antecedente de asfixia perinatal, lesiones compatibles con NGS e hipercalcemia clínica tardía (AU)

The subcutaneous fat necrosis in the newborn baby is a self limitingpanniculitis that usually occurs in full-term infants as a consequence of perinatal asphyxia. This type of panniculitis appears in the first 4 weeks of life. The prognosis is usually good with complete regression. Despite of that, potentially life-threatening complications as hypercalcemia can arise even 6 months after the skin lesions appear. We present a newborn baby with a history of perinatal asphyxia, typical skin lesions and late clinical hypercalcemia (AU)