Researchers at Indiana University School of Medicine have successfully reprogrammed a glial cell type in the central nervous system into new neurons to promote recovery after spinal cord injury–revealing an untapped potential to leverage the cell for regenerative medicine.
The group of investigators published their findings March 5 in Cell Stem Cell. In their study, they reported modifying a NG2 glia–a type of supporting cell in the central nervous system–into functional neurons after spinal cord injury, according to Wei Wu, PhD, research associate in neurological surgery at IU School of Medicine and co-first author of the paper, in a media release from Indiana University School of Medicine.
Wu and Xiao-Ming Xu, PhD, the Mari Hulman George Professor of Neuroscience Research at IU School of Medicine, worked on the study with a team of scientists from the University of Texas Southwestern Medical Center. Xu is also a primary member of Stark Neurosciences Research Institute, where he leads the Indiana Spinal Cord and Brain Injury Research Group.
Glial Cells Respond After SCI
When the spinal cord is injured, glial cells, of which there are three types–astrocyte, ependymal and NG2–respond to form glial scar tissue.
“Only NG2 glial cells were found to exhibit neurogenic potential in the spinal cord following injury in adult mice, but they failed to generate mature neurons. Interestingly, by elevating the critical transcription factor SOX2, the glia-to-neuron conversion is successfully achieved and accompanied with a reduced glial scar formation and increased functional recovery following spinal cord injury.”
— Wei Wu, PhD
The researchers reprogrammed the NG2 cells from the mouse model using elevated levels of SOX2–a transcription factor found inside the cell that’s essential for neurogenesis–to neurons. This conversion has two purposes, Xu said: generate neurons to replace those lost due to a spinal cord injury and reduce the size of the glial scars in the lesion area of the damaged tissue.
This discovery, Wu said, serves as an important target in the future for potential therapeutic treatments of spinal cord injury.
The partnership between the laboratory of Chun-Li Zhang, PhD, professor at UT Southwestern Medical Center, and Xu’s laboratory at IU School of Medicine greatly benefited the research, Xu added, by offering complementary expertise in neuronal reprogramming and in spinal cord injury, respectively, the release explains.
“Such a collaboration will be continued between the two laboratories to address neuronal remodeling and functional recovery after successful conversion of glial cells into functional neurons in future.”
— Xiao-Ming Xu, PhD
[Source(s): Indiana University School of Medicine, EurekAlert]
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