Specific laboratory test for diagnosis of multiple sclerosis

Area of Science:

• Immunology
• Neurology
• Biochemistry

Background:

• Multiple sclerosis (MS) is a chronic neurological disease with complex autoimmune components.
• Investigating cellular responses to specific fatty acids may reveal novel diagnostic markers.
• Linoleic acid, an unsaturated fatty acid, has shown potential immunomodulatory effects.

Purpose of the Study:

• To evaluate the differential susceptibility of lymphocytes from multiple sclerosis patients to linoleic acid's inhibitory activity.
• To determine if this differential susceptibility can serve as an in-vitro diagnostic test for multiple sclerosis.
• To explore the implications of these findings for understanding the disease's pathophysiology and genetic predisposition.

Main Methods:

• The macrophage electrophoretic mobility test was employed to assess lymphocyte sensitization.
• Lymphocytes from multiple sclerosis patients, healthy controls, and patients with other neurological diseases were tested.
• The inhibitory effect of a specific concentration of linoleic acid (0.08 mg/ml) on these lymphocytes was quantified.

Main Results:

• Lymphocytes from multiple sclerosis patients exhibited significantly higher inhibition (91%) by linoleic acid compared to normal subjects (57%).
• Cells from patients with other neurological diseases showed a lower inhibition rate (47%).
• Approximately 43% of clinically normal near relatives of MS patients displayed an anomalous inhibition rate (77%), distinct from the general population.

Conclusions:

• The heightened susceptibility of multiple sclerosis lymphocytes to linoleic acid inhibition is specific to the disease.
• This phenomenon presents a potential in-vitro diagnostic tool for multiple sclerosis.
• An anomalous response to linoleic acid may indicate a congenital predisposition or altered unsaturated fatty acid metabolism relevant to MS.