Supervisor: Dr Rosemary Cater (r.cater@uq.edu.au)
The blood-brain barrier (BBB) is a layer of tightly packed endothelial cells that separate the blood for the brain. The BBB has evolved to protect our brains from blood-borne neurotoxins and pathogens, but unfortunately, it also prevents the majority of potential neurotherapeutics from entering the brain. In fact, it has been estimated that ~98% of all small-molecule drugs are not able to cross the BBB. This creates a major bottleneck in the development of treatments for diseases such as Parkinson’s disease, Alzheimer’s disease, glioblastoma, anxiety, and depression. The more we know about what can enter the brain, the better informed we will be for developing treatments for these diseases. Transporter proteins expressed at the BBB play a very important role in regulating the entrance of molecules in a highly specific manner. For example, the transporters FLVCR2 and MFSD2A allow for the uptake of choline and omega-3 fatty acids into the brain – both of which are essential nutrients that the brain requires in very large amounts. This project will utilise biochemical techniques and structural biology (cryo-EM) to further understand transport proteins at the BBB and how they transport specific molecules into the brain. This will provide critical insights that for the development of neurotherapeutics that can hijack these transporters to allow for entrance into the brain.