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Antibody leads to repair of myelin sheath in lab study of multiple sclerosis and related disorders
Date:10/9/2007

ROCHESTER, Minn. -- Mayo Clinic researchers have found that a human antibody administered in a single low dose in laboratory mouse models can repair myelin, the insulating covering of nerves that when damaged can lead to multiple sclerosis and other disorders of the central nervous system.

The study will be presented on Oct. 9 at the American Neurological Association meeting in Washington, D.C.

The repair of chronic spinal cord injury is seldom modeled in laboratory studies, but it is an important reality for the treatment of humans. The concept of using natural human antibodies to treat disease of this kind has not yet been tested in humans, but these research findings are very promising, says Moses Rodriguez, M.D., a Mayo Clinic neurologist and the studys corresponding author. The findings could eventually lead to new treatments that could limit permanent disability, states Arthur Warrington, Ph.D., a Mayo Clinic scientist and study author.

Myelin repair normally occurs spontaneously, but in multiple sclerosis and other disorders of the central nervous system, the myelin repair process occurs very slowly or fails altogether. Researchers are trying to determine how to speed up the myelin healing process, which they hope will eventually lead to new treatments for patients.

The antibody, which was genetically engineered from a single cell, binds to myelin and the surface of cells in the brain and spinal cord, then it triggers the cells to begin the repair process called remyelination. This antibody is the first known reagent designed to induce repair by acting within the central nervous system at the damage sites on cells responsible for myelin synthesis.

The study uses laboratory mouse models of chronic progressive multiple sclerosis in humans. The severity of the disease and also success of the treatment were largely defined by how naturally active the mice were, particularly during the night because mice are noctur
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Contact: Amelyn Reyes
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
Source:Eurekalert

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