| The blood-brain barrier is a physiological boundary layer that works highly selectively and thus protects the brain: On the one hand, pathogens or toxins are effectively prevented from penetrating the brain, on the other hand, however, necessary messengers and nutrients can pass through them unhindered. This selectivity makes it difficult for physicians to examine or treat the brain because drugs or contrast agents for imaging procedures cannot overcome the barrier. | |
| Scientists led by Dr. Jana Hedrich, Prof. Dr. Heiko Luhmann and Prof. Dr. Tanja Weil, in cooperation with the University of Ulm and the University Medical Center of the Johannes Gutenberg University in Mainz have now investigated the suitability of a system based on nanodiamonds as diagnostic and therapeutic method. |
| Nano-diamonds with a size in the range of a millionth of a meter have the advantage of high biocompatibility: they are not degradable for the body, should be well tolerated and are therefore potentially suitable for both diagnostic and therapeutic purposes. | |
| For their research, the scientists have modified the diamonds in two ways: A coating with a biopolymer based on the most abundant protein in human blood, “serum albumin”, enables the diamonds to be absorbed into the brain and later to be combined with drugs. | |
| “Diamonds are chemically non-reactive, which means that it is difficult to bind drug molecules,” says Jana Hedrich and Tanja Weil. “The albumin coating enables us to create a stable coating and bind almost any medication to it.” | |
| As a further modification, a defect was specifically introduced into the diamond by replacing an atom in the diamond, which consisting of carbon, with a nitrogen atom. Furthermore, there is an empty space in the crystal directly next to this nitrogen atom. | |
| “A diamond is normally very clear and, ideally, flawless – light can therefore easily pass through it,” explains Hedrich…. |
Image Credit: University Medical Center of the Johannes Gutenberg University in Main
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