Repairing Damaged Tissues - National Multiple Sclerosis Society

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Repairing Damaged Tissues

Decades of research into nerve physiology, MS tissue damage and the biology of glial cells – the numerous brain cells that support nerve cells – have laid the groundwork for finding ways to restore normal function in individuals with MS.


In this article

Nervous System Repair – Reversing Damage to Regain Function

Repairing the nervous system, in particular myelin, the coating that surrounds and protects axons (nerve wires) and which is damaged by MS, was just a dream just a few years ago. Today it holds significant promise as a strategy to restore the function that MS has taken from people; and reducing or stopping MS progression. This remarkable progress is due to the National MS Society’s comprehensive efforts and multi-million dollar research investments.

We are at a pivotal moment in time where breakthrough solutions can change the world for everyone with MS. Among the approaches being taken are:
• Clinical trials to stimulate the natural capacity of the brain to repair itself.
• Tests of the ability of stem cells to treat MS damage.
• Finding ways to protect the nervous system to allow natural myelin repair to occur.
• Developing better ways to track successful repair.

This exciting research area has been gaining momentum since the Society’s 2005 global initiative funded four collaborative teams who were focused on nervous system protection and repair. Over five years, the teams engaged more than 100 investigators, produced over 180 research papers, identified new therapeutic targets and launched clinical trials to test neuroprotective strategies. Today the Society is supporting 87 research projects in nervous system repair, with multi-year commitments totaling over $35 million.

Promoting natural capacity for repair

Research shows that the brain does repair myelin to some extent, but myelin repair may stall. While we don’t fully understand why repair fails in MS, early clinical trials are now underway to test their ability to stimulate myelin repair. The Society is supporting research looking at key molecules that are important to the cells that make myelin (oligodendrocytes) and that may serve as targets for promoting myelin repair. Promising solutions to restore function are now at our fingertips:
• Jonah Chan, PhD (University of California, San Francisco) won the Society’s first Barancik Prize for Innovation in MS research for creating novel technology that enables screening of thousands of molecules for their myelin repair potential. The strategy identified one drug that is now in clinical trials, possibly bringing potential treatments to market more quickly.
• Acorda Therapeutics is launching a Phase I clinical trial to test an antibody called “rHIgM22,” which promotes myelin repair in mice. Early Society support to Dr. Moses Rodriguez at the Mayo Clinic helped his team to uncover this antibody’s myelin repair properties.
• Several Society-supported commercial research initiatives are exploring ways to enhance the ability of oligodendrocytes to proliferate in areas of myelin damage to facilitate repair. For example, we’re supporting ENDECE Neural to further develop NDC-1308, a form of hormone that has shown early potential to promote nerve repair.

Stem Cell Therapy

There is exciting progress being made through innovative research related to the potential of many types of stem cells both for slowing MS disease activity and for repairing damage to the nervous system. With the urgent need for more effective treatments for MS, particularly for those with more progressive forms of the disease, we believe that the potential of all types of cell therapies must be explored. The National MS Society is currently supporting 12 research projects exploring various types of stem cells, including cells derived from bone marrow, fat and skin, and has supported 70 stem cell studies over the past 10 years.

At present, there are no approved stem cell therapies for MS. Stem cell therapy is in the experimental stage, and it’s important for people to have the best available information to understand this exciting area of research and make decisions related to this complex issue.

Read about National MS Society Research in Stem Cells

Read more about stem cells in MS

Protecting the nervous system

To stop further damage and allow natural myelin repair to occur, the Society is funding clinical trials of potential therapies that will protect the nervous system. For example:
• Ibudilast – a repurposed drug with protective potential for progressive forms of MS (funded with the Cleveland Clinic Foundation and National Institutes of Health’s NeuroNEXT Network)
• Lipoic acid – antioxidant may help block nerve fiber damage in MS
• Phenytoin – reduces entry of sodium, linked to increased disease activity, into nerve fibers (collaboration with United Kingdom MS Society)
• The MS-SMART trial which is testing three therapies that may have nerve-protecting properties in secondary-progressive MS (funded in collaboration with the United Kingdom MS Society)
• A trial of the sex hormone estriol, linked to protection seen in pregnancy, added to Copaxone (funded with NIH)

Tracking repair

The Society fuels research to find ways to detect whether the nervous system is being repaired or protected by therapies in future clinical trials. Approaches include:
• Non-conventional brain imaging and scanning nerves at the back of the eye
• Biomarkers in the blood or spinal fluid – which could be “footprints” that indirectly indicate the success of a repair therapy
• Better clinical readouts – called outcome measurements -- that can determine whether a repair or protection therapy is working, without waiting years to watch the disease course 

Finding Repair Solutions

Achieving success in the Society’s priority area of nervous system repair would provide life-changing advances for people with MS. It could allow us to restore neurological function for people with all types of MS, including progressive forms of the disease.