Brain tissue analysis showed elevated levels of imidazole propionate, confirming the metabolite’s ability to penetrate neural tissue. Oral Health Meets Neurological DiseaseThe study’s most unsettling implication involves the journey these bacteria make from mouth to brain. Once established, the bacteria begin producing imidazole propionate, which enters systemic circulation and accumulates in brain tissue. The study also examined interactions with alpha-synuclein, the misfolded protein that accumulates in Parkinson’s brain lesions. The identification of UrdA as a key pathogenic enzyme suggests potential drug targets for blocking imidazole propionate production.