Scientists at The Schepens Eye Research Institute have discovered that a protein known as F4/80 found on immune cells in the eye and other parts of the body may have a function in the regulation of the bodys immune response and protect delicate tissues that cannot survive the "inflammation" inherent in full-blown immunity.
"We believe that this discovery may ultimately help in the development of therapies for blinding eye diseases such as macular degeneration and autoimmune diseases that occur when the immune system goes awry," says Joan Stein-Sreilein, PhD, senior author of the study published in the May issue of the Journal of Experimental Medicine and senior scientist at The Schepens Eye Research Institute.
According to Stein-Streilein, the discovery is another piece of the "immune privilege" puzzle. Certain parts of the body, including the eyes, brain, gastrointestinal system and reproductive system have the ability to prevent the usual immune response onset when confronted with foreign invaders such as bacteria. Without this special reaction, the eyes delicate tissue would be destroyed by inflammation and the gastrointestinal tract could not tolerate the ingestion of food. The F4/80 molecule (also known as a glycoprotein) was first discovered two decades ago on immune cells in the eye, gut and other privileged sites, but its function has not been understood.
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