Identification of a novel type 1 diabetes-specific epitope by screening phage libraries with sera from pre-diabetic patients.

We used random peptide libraries displayed on phage to search for ligands to insulin dependent diabetes mellitus-related antibodies and were able to identify several candidate disease-related peptides. One of them, clone 92, showed a significant difference in the frequency of reactivity with the sera of patients and normal controls. Human immunoglobulins immunopurified on phage 92 specifically stained the islets on human pancreatic sections. When injected into rabbits, the selected peptide elicited antibodies that also stained human and rat pancreatic sections, with a pattern similar to that observed with immunoglobulins purified from the sera of patients. No reactivity was observed in other tissues. Our results indicate that the peptide identified in this work mimics a novel, diabetes-related self-antigen

Relapsing-remitting autoimmune agrypnia

A woman affected by multiple cranial nerve palsy developed several episodes of total insomnia and respiratory crises resulting from central breathing depression associated with dysautonomic symptoms. Oligoclonal IgG bands were present in her cerebrospinal fluid, and immunohistochemistry showed increased binding of serum and cerebrospinal fluid on gamma-aminobutyric acid-ergic, synapse-rich neuronal cells. Immunosuppressive treatment and plasma exchange were followed by clinical improvement, with restoration of sleep architecture and disappearance of respiratory crises, suggesting autoimmune pathogenesis of the syndrome

Microstructure of sleep in eating disorders: preliminary results

Attempts to analyse the sleep structure of patients with eating disorders have so far led to conflicting results. Polygraphic findings suggest that patients with bulimia nervosa are not easily distinguishable from age-matched controls, whereas anorexic patients show some abnormalities in sleep efficiency and sleep architecture. Nevertheless, both bulimic and anorexic patients complain of poor quality sleep. The aim of this study was to evaluate the microstructure of sleep in anorexia and bulimia by analysing arousal (following the rules of the American Sleep Disorders Association) and the cyclic alternating pattern (CAP). The results confirmed the presence of sleep disturbances in eating disordered patients: an increase in arousal length and the CAP rate. They also seem to confirm the findings of previous studies suggesting that altered sleep in eating disordered patients may be related to their body mass index (BMI) and psychopathological status