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Updated: Jul 20, 2025
ALS - Motor Neuron Disease: Mechanism and Development of New Therapies
Published on: July 29, 2007
Elevated α5 integrin expression on myeloid cells in motor areas in amyotrophic lateral sclerosis is a therapeutic
Aude Chiot1,2, Shanu F Roemer3, Lisa Ryner4
1Department of Molecular Microbiology and Immunology, Oregon Health and Science University, Portland, OR 97239.
Abstract:
Amyotrophic lateral sclerosis (ALS) is a fatal disease affecting upper and lower motor neurons. Microglia directly interact with motor neurons and participate in the progression of ALS. Single-cell mass cytometry (CyTOF) analysis revealed prominent expression of α5 integrin in microglia and macrophages in a superoxide dismutase-1 G93A mouse model of ALS (SOD1G93A). In postmortem tissues from ALS patients with various clinical ALS phenotypes and disease duration, α5 integrin is prominent in motor pathways of the central and peripheral nervous system and in perivascular zones associated with the blood-brain barrier. In SOD1G93A mice, administration of a monoclonal antibody against α5 integrin increased survival compared to an isotype control and improved motor function on behavioral testing. Together, these findings in mice and in humans suggest that α5 integrin is a potential therapeutic target in ALS.
Insights
Researchers identified alpha-5 integrin (α5 integrin) as a key molecule in Amyotrophic Lateral Sclerosis (ALS) progression. Targeting α5 integrin in mice improved survival and motor function, suggesting it as a potential therapeutic target for ALS.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease impacting motor neurons.
- Microglia play a role in ALS pathogenesis through interactions with motor neurons.
Purpose of the Study:
- To investigate the role of alpha-5 integrin (α5 integrin) in ALS.
- To evaluate α5 integrin as a potential therapeutic target for ALS.
Main Methods:
- Single-cell mass cytometry (CyTOF) was used to analyze microglia and macrophage expression of α5 integrin in a SOD1G93A mouse model of ALS.
- Immunohistochemistry was performed on postmortem human ALS tissues.
- Therapeutic efficacy of an anti-α5 integrin antibody was assessed in SOD1G93A mice.
Main Results:
- α5 integrin was found to be prominently expressed in microglia and macrophages in the ALS mouse model.
- In human ALS patients, α5 integrin was prevalent in motor pathways and perivascular zones.
- Treatment with an anti-α5 integrin antibody significantly increased survival and improved motor function in SOD1G93A mice.
Conclusions:
- α5 integrin is highly expressed in ALS, both in mouse models and human patients.
- Targeting α5 integrin demonstrates therapeutic potential for ALS treatment.
- α5 integrin represents a promising therapeutic target for Amyotrophic Lateral Sclerosis.
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