A temporary tattoo containing antioxidant
nanoparticles may help treat autoimmune diseases such as multiple sclerosis in
the future. The study shows that nanoparticles modified with polyethylene
glycol (PEG) are conveniently choosy as they are taken up by cells in the
immune system. That could be a plus for patients with autoimmune diseases like
multiple sclerosis. Placed just under the skin, the carbon based particles form
a dark spot that fades over about one week as they are slowly released into the
circulation. T and B lymphocyte cells and macrophages are key components of the
immune system. However in many autoimmune diseases like multiple sclerosis, T
cells are the key players. One suspected cause is that T cells lose their
ability to distinguish between invaders and healthy tissue and attack both. The
ability to selectively inhibit one type of cell over others in the same
environment may help doctors gain more control over autoimmune diseases.

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