Yes, 6-hydroxydopamine (6-OHDA) is a neurotoxin that has been used to induce Parkinson's-like symptoms in animals, and it has been suggested as a potential cause of Parkinson's disease in humans. However, it is important to note that the exact cause of Parkinson's disease is not fully understood, and more research is needed to determine the role of 6-OHDA and other toxins in the development of the disease.