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Multiple sclerosis: serum factor producing reversible alterations in bioelectric responses
Science (New York, N.Y.)
|May 20, 1966
Summary
Serum from multiple sclerosis (MS) patients reversibly impairs frog spinal cord reflexes. This effect, dependent on complement, primarily impacts polysynaptic responses, sparing monosynaptic motoneuron activity.
Area of Science:
- Neuroscience
- Immunology
- Pathophysiology
Background:
- Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system.
- Acute exacerbations in MS are characterized by inflammatory processes that can affect neuronal function.
Purpose of the Study:
- To investigate the effects of serum from MS patients during acute exacerbations on spinal cord reflex activity.
- To determine the specific neuronal pathways affected by MS patient serum.
Main Methods:
- Application of serum from patients with acute multiple sclerosis exacerbations to an isolated frog spinal cord.
- Electrophysiological recording of polysynaptic and monosynaptic reflex responses.
- Assessment of motoneuron discharge patterns.
Main Results:
- Serum from MS patients reversibly depressed polysynaptic reflex responses in the frog spinal cord.
- Monosynaptic reflex responses, particularly motoneuron discharges via axosomatic pathways, were less affected.
- The depressant activity of the serum was linked to the presence of complement.
Conclusions:
- Serum factors present during multiple sclerosis exacerbations can modulate spinal cord excitability.
- The observed effects suggest a potential role for complement-mediated mechanisms in the neurophysiological alterations during MS flares.