“Es fundamental que la información que se transmita sea confiable”

El flamante Doctor Honoris Causa de la UNLP, Emilio Luque Fadón, de la Universidad Autónoma de Barcelona, fue uno de los conferencistas de CACIC 2017. Durante su estadía por la ciudad de La Plata, el español habló acerca de las nuevas tecnologías, su tolerancia a los fallos y el consumo energético.Facultad de Informátic

Neutrophil Elastase-mediated proteolysis activates the antiinflammatory cytokine IL-36 Receptor antagonist

The interleukin-36 receptor antagonist (IL-36Ra) which regulates IL-36α, -β and -γ is linked to psoriatic inflammation, especially loss-of-function mutations in pustular psoriasis subtypes. As observed with other IL-1 superfamily proteins, the IL-36 members require N-terminal cleavage for full biological activity but the mechanisms of IL-36Ra activation remain poorly defined. Using different blood leukocyte and skin resident cell preparations, and recombinant proteins, we have identified that neutrophil elastase, but not other neutrophil derived proteases, cleaves IL-36Ra into its highly active antagonistic form. The activity of this processed form of IL-36Ra was confirmed in human primary dermal fibroblasts and keratinocytes and in skin equivalents. A significant dose dependent reduction of IL-36γ induced IL-8 and chemokine ligand 20 (CCL20) levels were detected following addition of the cleaved IL-36Ra compared to full length IL-36Ra. By activating IL-36Ra, the neutrophil derived protease can inhibit IL-36 induced chemokine production, including IL-8 and CCL20, and reduce further inflammatory cell infiltration. These findings strongly indicate neutrophil elastase to be a key enzyme in the biological function of IL-36Ra and that neutrophils can play a regulatory role in psoriatic inflammation with regard to balancing the pro-inflammatory activity of IL-36

Cutis laxa

Contains fulltext : 127730.pdf (publisher's version ) (Closed access)Cutis laxa is an inherited or acquired disease characterized by redundant, sagging and inelastic skin. In inherited cutis laxa an abnormal synthesis of extracellular matrix proteins occurs due to genetic defects coding for diverse extracellular matrix components. Recently, different inborn errors of metabolism have been found to be associated with cutis laxa as well. In some of these metabolic conditions the pathomechanism of cutis laxa remains unknown. Cutis laxa can be inherited in an autosomal dominant, autosomal recessive and X-linked recessive inheritance pattern. Besides the skin abnormalities, in most inherited forms multiple organ systems are involved, leading to a severe, in some forms even lethal, multisystem disorder. To date no effective treatment is available for cutis laxa. This chapter focuses on inherited forms of cutis laxa, offering a practical guideline for clinicians, biochemist and geneticist to diagnose and differentiate between the different forms of cutis laxa, and providing a concise theoretical reference