Introduction: The pathogenesis of parkinsonisms is not fully understood. Among possible factors which may influence the course of neurodegenerative diseases, endocrine abnormalities may be interpreted as having been underevaluated.
State of the art: Growing interest is associated with the role of neuropeptides such as orexin. Orexin is a neuropeptide produced by orexigenic neurons in the lateral parts of the hypothalamus and is linked with excitement, wakefulness and appetite. An extended analysis of this neuropeptide might answer whether changes in the metabolism of orexin is more likely to be a cause or a consequence of neurodegeneration.
Clinical significance: Orexin is a neuropeptide produced by orexigenic neurons in the lateral parts of the hypothalamus and is linked with excitement, wakefulness and appetite. The aim of this study was to discuss the role of this factor and its abnormalities in the pathogenesis and course of parkinsonian syndrome.
Future directions: Understanding the role of orexin in these diseases may be interpreted as an important feature in evolving therapeutical methods. Further evaluation based on larger groups of patients is required.
Keywords: PSP; Parkinson’s Disease; hypothalamus; orexin; parkinsonism.