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Inflammatory Bowel Disease can Be Treated by Bone Marrow Stem Cells
Researchers at the Massachusetts General Hospital (MGH) found that mesenchymal stem cells (MSCs), known to control several immune system activities, allowed the regeneration of the gastrointestinal lining in mice with a genetic mutation leading to multiorgan autoimmune disease.
"Our findings suggest that MSC therapy could become a useful treatment for inflammatory bowel disease," said lead author Biju Parekkadan, PhD, of MGH Center for Engineering in Medicine.
"Several previous studies have observed these cells' ability to inhibit specific subsets of T cells and relieve symptoms in particular autoimmune disorders. But this is the first demonstration of their ability to suppress a broad-based autoimmune reaction and protect gastrointestinal tissue," Parekkadan added.
Found in the bone marrow, MSCs give rise to tissues supporting blood cell development and secrete factors that can modulate several immune system activities. Their use has recently received FDA approval to treat severe graft-versus-host disease in children.
The new study was designed to find MSCs' therapeutic potential in a model of multiorgan autoimmune disease.
The researchers used a strain of mice in which a genetic mutation leads to deficiency in regulatory T cells, which suppress the activity of self-reactive immune cells, resulting in overwhelming autoimmune disease.
The mice were treated with infusions of either MSCs or regulatory T cells, and a week later the researchers examined the effects on tissues from the pancreas, the liver and the distal ileum - the lower end of the small intestine - which are usually attacked by autoimmune reactions.
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