Schwiertz A, et al. - Researchers intended to examine if fecal markers of inflammation and impaired intestinal barrier function were implicated in the multifactorial pathogenesis of Parkinson's disease (PD). It was determined that calprotectin, alpha-1-antitrypsin and zonulin could prove to be beneficial non-invasive markers in PD. Despite not being disease-specific, these markers corroborated the hypothesis of an intestinal inflammation as a contributing factor in the pathogenesis of PD.