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Spontaneous proliferation of cerebrospinal fluid mononuclear cells in multiple sclerosis. A longitudinal study
Abstract:
Cerebrospinal fluid (CSF) and peripheral blood (PB) specimens from 32 MS patients longitudinally followed for up to 24 months and from a group of control patients without intrathecal inflammation were studied for the occurrence of activated lymphocytes with an autoradiography method. MS patients had higher numbers of proliferating mononuclear cells in CSF than did the controls, both during remission and exacerbation phases, whereas this difference was not found in the PB. ACTH treatment decreased the number of proliferating cells in CSF but had no effect on those of the PB of MS patients. A large variation in spontaneous proliferation of CSF cells was evident during the follow-up of individual patients, and there seemed to be no uniform correlation to the clinical fluctuations.
Insights
Activated lymphocytes in cerebrospinal fluid (CSF) are elevated in multiple sclerosis (MS) patients compared to controls. Adrenocorticotropic hormone (ACTH) treatment reduced these proliferating cells in MS patients' CSF.
Area of Science:
- Neuroimmunology
- Cellular Immunology
- Autoimmune Diseases
Background:
- Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system.
- The role of activated lymphocytes in the cerebrospinal fluid (CSF) of MS patients requires further investigation.
Purpose of the Study:
- To quantify and characterize proliferating mononuclear cells in the CSF and peripheral blood (PB) of MS patients.
- To assess the impact of ACTH treatment on these cell populations.
Main Methods:
- Autoradiography method used to study CSF and PB specimens.
- Longitudinal follow-up of 32 MS patients for up to 24 months.
- Comparison with control patients lacking intrathecal inflammation.
Main Results:
- MS patients exhibited significantly higher numbers of proliferating mononuclear cells in CSF compared to controls during both remission and exacerbation phases.
- No significant difference in proliferating cells was observed in the PB of MS patients versus controls.
- ACTH treatment led to a decrease in proliferating cells within the CSF of MS patients, with no effect on PB cells.
- Individual MS patients showed considerable variation in spontaneous CSF cell proliferation over time, without a clear correlation to clinical fluctuations.
Conclusions:
- Elevated CSF lymphocyte proliferation is a characteristic feature in MS, independent of disease phase.
- ACTH therapy demonstrates immunomodulatory effects within the central nervous system of MS patients.
- The dynamic nature of CSF cell proliferation suggests complex underlying disease mechanisms in MS.