Ricerc@Sapienza

The involvement of nitric oxide (NO) in the modulation of teleost osmoresponsive circuits is suggested by the facts that NO synthase enzymes are expressed in the neurosecretory systems and may be regulated by osmotic stimuli. The present paper is an overview on the research suggesting a role for NO in the central modulation of hormone release in the hypothalamo-neurohypophysial and the caudal neurosecretory systems of teleosts during the osmotic stress response.

Context: The 250-mg short Synacthen (corticotropin) test (SST) is the most commonly used tool to assess hypothalamo-pituitary-adrenal (HPA) axis function. There are many potentially reversible causes of adrenal insufficiency (AI), but no data to guide clinicians as to the frequency of repeat testing or likelihood of HPA axis recovery. Objective: To use the SST results to predict adrenal recovery. Design: A retrospective analysis of 1912 SSTs data. Patients: Seven hundred seventy-six patients with reversible causes of AI were identified who had at least two SSTs performed.