Researchers advance efforts to develop protein-based treatment therapy for individuals with ALS

Researchers advance efforts to develop protein-based treatment therapy for individuals with ALS
Effect of ApoE on mBEC viability after ALS mouse plasma exposure in vitro. A, Numerous viable (green) mBECs were observed in cultures with basal media. B, Dead (red) cells significantly increased after exposure to 3% ALS mouse plasma. C, Adding 50 μg/ml of ApoE to culture media with ALS plasma did not reduce dead cells. Scale bar: 50 μm (A-C). D, Statistical analyses reflect imaging; **p < 0.01. Credit: eNeuro (2022). DOI: 10.1523/ENEURO.0140-22.2022

Researchers at the USF Health Morsani College of Medicine, located at the University of South Florida, successfully tested a protein that has the potential to aid in the development of a protein-based therapy for patients with ALS, a progressive nervous system disease, also known as Lou Gehrig's disease, that affects nerve cells in the brain and spinal cord.

Published in eNeuro, the study examines the effects of apolipoprotein A1, a "good cholesterol" on , the lining in that provides a barrier between the brain, spinal cord tissues and blood circulation.

In a under an environmental condition reminiscent of ALS, the team found that the protein activates a unique pathway inside cells that increases survival and protects endothelial cells from in the blood. This pathway can enhance the survival of cells and prevent further vascular damage by ALS.

"With a functional barrier, the hope is that the environment in the central nervous system will become less toxic and can be slowed," said Svitlana Garbuzova-Davis, professor at the Department of Neurosurgery and Brain Repair and lead investigator.

While the protein has proven to protect endothelial cells in diseases such as diabetes and atherosclerosis, the effects on ALS-damaged endothelial cells were previously unknown.

To test the impact on ALS, the team examined how the protein affects endothelial cell signals. Garbuzova-Davis and co-investigators USF Professor Alison Willing and USF Distinguished University Professor Cesario Borlongan discovered that the injured cells absorb the protein, significantly reducing endothelial cell damage.

"It's a little early to predict what the ultimate effect is for patients," Willing said. "In this study, we used a cell culture model where we can control all aspects of what the cells are exposed to. It is not possible to have the same degree of control in people."

Garbuzova-Davis says this study laid the groundwork for additional research with animal models of ALS to fully determine the therapeutic effects of the protein. Upon successful results, apolipoprotein A1 may be considered for , where it would be evaluated for safety and efficacy in ALS patients.

In the near future, apolipoprotein A1 may be considered a potential novel therapeutic for endothelial cell repair, restoring the barrier in ALS patients. It may also help alleviate ALS symptoms, such as imbalanced antioxidant levels and inflammation.

More information: Svitlana Garbuzova-Davis et al, Apolipoprotein A1 Enhances Endothelial Cell Survival in an In Vitro Model of ALS, eNeuro (2022). DOI: 10.1523/ENEURO.0140-22.2022
Journal information: eNeuro

Citation: Researchers advance efforts to develop protein-based treatment therapy for individuals with ALS (2022, October 4) retrieved 8 December 2022 from https://medicalxpress.com/news/2022-10-advance-efforts-protein-based-treatment-therapy.html
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