Nanotechnology treatment shows promise against multiple sclerosis

Nanotechnology treatment shows promise against multiple sclerosis
Credit: ACS

A nanotechnology treatment derived from bone marrow stem cells has reversed multiple sclerosis symptoms in mice and could eventually be used to help humans, according to a new study led by University of California, Irvine researchers.

"Until now, stem cell therapies for autoimmune and neurodegenerative diseases have produced mixed results in , partly because we don't know how the treatments work," said corresponding author Weian Zhao, an associate professor of pharmaceutical sciences and who is affiliated with the Sue & Bill Gross Stem Cell Research Center. "This study helps unravel that mystery and paves the way for testing with ."

In past experiments, intravenously injected stem cells—taken from bone marrow and activated with interferon gamma, an immune system protein—often got trapped in filter organs before reaching their target. For this study, published in the journal ACS Nano, researchers avoided that problem by extracting nano-sized particles called exosomes from the stem cells and injecting them into rodents with MS.

Loaded with anti-inflammatory and neuroprotective RNA and protein molecules, the exosomes were able to slip through the blood-spinal cord barrier. In addition to rejuvenating lost and decreasing caused by MS, they normalized the subjects' immune systems, something conventional drugs can't do, said study co-lead author Reza Mohammadi, a UCI doctoral candidate in materials science & engineering.

More experiments are in the pipeline.

"This novel treatment will be tested on humans in early 2020, initially on people with Type 1 diabetes," said co-lead author Milad Riazifar, who worked on the study as a pharmacological sciences doctoral student in Zhao's lab and is currently helping prepare for a City of Hope clinical trial of the method. "If successful, it could pave the way for treating other autoimmune diseases, including multiple sclerosis."


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More information: Milad Riazifar et al, Stem Cell-Derived Exosomes as Nanotherapeutics for Autoimmune and Neurodegenerative Disorders, ACS Nano (2019). DOI: 10.1021/acsnano.9b01004

Other UCI researchers involved were Egest J. Pone, Aude I. Segaliny, Laura L. McIntyre, Ashley Hamamoto, Erika N. Calle, Wenbin Liao, Victor Pham, Jayapriya Jayaraman, Jonathan R.T. Lakey and Craig M. Walsh. Support was provided by the National Institutes of Health, a National Institute of Neurological Disorders and Stroke training grant, an Otto W. Shaler Scholarship and France's ARC Foundation for Cancer Research.

Journal information: ACS Nano

Citation: Nanotechnology treatment shows promise against multiple sclerosis (2019, June 5) retrieved 17 June 2019 from https://phys.org/news/2019-06-nanotechnology-treatment-multiple-sclerosis.html
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