Riccardo Navone

Learn More
BACKGROUND Celiac disease is a small intestine inflammatory disorder with multiple organ involvement, sustained by an inappropriate immune response to dietary gluten. Anti-transglutaminase antibodies are a typical serological marker in patients with active disease, and may disappear during a gluten-free diet treatment. Involvement of infectious agents and(More)
Hemopexin (Hx) is a plasma glycoprotein mainly expressed in liver and, less abundantly, in the central and peripheral nervous systems. Hx has a high binding affinity with heme and is considered to be a major transport vehicle of heme into the liver, thus preventing both heme-catalyzed oxidative damage and heme-bound iron loss. To determine the physiologic(More)
Systemic sclerosis is an autoimmune disease characterized by immunological and vascular abnormalities. Autoantibodies against intracellular antigens are associated with particular clinical features of the disease, whereas autoantibodies against cell surface antigens may be pathogenic by inducing endothelial cell damage, considered the primary event in the(More)
BACKGROUND Cogan's syndrome is a chronic inflammatory disease of unknown origin, characterised by sensorineural hearing loss, episcleritis, and vasculitis. An autoimmune origin has been suggested but not proven. Our aim was to establish whether or not an autoimmune process is the cause of the disease. METHODS We used pooled IgG immunoglobulins derived(More)
Sjögren's syndrome (SS) is an autoimmune disease characterized by lymphocytic infiltration and tissue damage mainly confined to the salivary and lacrimal glands, resulting in dryness of mouth and eyes. Since different epithelial cells of exocrine and non-exocrine tissues are primarily affected, an autoimmune reaction against antigens commonly expressed in(More)
BACKGROUND Systemic sclerosis is an autoimmune disease characterized by immunological abnormalities, vascular damage, and fibroblast proliferation. We have previously shown that a molecular mimicry mechanism links antibodies against the human-cytomegalovirus-derived protein UL94 to the pathogenesis of systemic sclerosis. The UL94 epitope shows homology with(More)
BACKGROUND Infections and autoimmunity have been implicated in the pathogenesis of atherosclerosis. Cytomegalovirus has been shown to contribute to the disease. Autoantibodies against human heat-shock protein (HSP) 60 are present in most atherosclerotic patients, and their titre correlates with disease severity, suggesting that anti-HSP60 might be(More)
Le cellule C (parafollicolari) della tiroide di cane conservano in vitro, in coltura organotipica, i loro caratteri istochimici ed ultrastrutturali. Tali cellule, cui viene attualmente attribuita la funzione di produrre calcitonina, reagiscono ad una elevazione del contenuto in calcio del terreno di coltura, con modificazioni istochimiche (perdita della(More)
DNase I is the major nuclease present in biological fluids and is ubiquitously expressed in mammalian tissues. It is responsible for the removal of DNA from nuclear antigens, and consistently with this function, DNase I-deficient mice show features of autoimmunity. The enzyme seems also to be involved in apoptosis (programmed cell death). We demonstrate(More)
BACKGROUND Human cytomegalovirus (hCMV) is involved in the pathogenesis of atherosclerosis. We have previously shown in patients with atherosclerosis that antibodies directed against the hCMV-derived proteins US28 and UL122 are able to induce endothelial cell damage and apoptosis of non-stressed endothelial cells through cross-rection with normally(More)