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Increased perforin expression in multiple sclerosis patients during exacerbation of disease in peripheral blood
G Rubesa1, E R Podack, J Sepcić
1Department of Physiology and Immunology, Medical Faculty, University of Rijeka, Croatia.
Abstract:
The expression of perforin (P) in subpopulations of the PBL of multiple sclerosis (MS) patients in stable and active phase of disease was investigated, by simultaneous detection of P (intracellular molecule) and cell surface antigens. A significant increase of CD4+P+ (p < 0.02) and CD16+P+ (p < 0.001), and decrease of CD56+P+ (p < 0.05) cells in active MS was found. In active disease there is a highly significant increase (p < 0.001) of average fluorescence intensity (AFI) for P in CD4(dim+) cells, and these cells are larger in size and have higher granularity (p < 0.05) compared to CD4(bright+) p(dim+) cells. Surprisingly, there were no CD25+P+ cells in either group of MS patients. These results show that CD4+P+ cells are upregulated in active disease in cell number, in the level of P expression per cell, and in the level of cell activation (increase in cell size and granularity). It is suggested that CD4+P+ cytotoxic cells may play a role in the pathogenetic mechanisms of MS.
Insights
In active multiple sclerosis (MS), CD4+ perforin (P)+ cells increase significantly in number and expression level. These activated cytotoxic cells may contribute to MS pathogenesis.
Area of Science:
- Immunology
- Neuroscience
- Cell Biology
Background:
- Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system.
- Perforin (P) is a key cytotoxic molecule involved in immune responses.
- Understanding immune cell behavior in MS is crucial for developing targeted therapies.
Purpose of the Study:
- To investigate perforin expression in peripheral blood lymphocyte (PBL) subpopulations in patients with stable and active multiple sclerosis (MS).
- To correlate perforin levels with cell surface markers and cell activation states in MS patients.
Main Methods:
- Simultaneous detection of intracellular perforin (P) and cell surface antigens in PBLs from MS patients.
- Flow cytometry was used to quantify cell populations and measure average fluorescence intensity (AFI) for perforin.
- Analysis included cell size and granularity to assess activation status.
Main Results:
- A significant increase in CD4+P+ and CD16+P+ cells was observed in active MS compared to stable MS.
- A decrease in CD56+P+ cells was noted in active MS.
- Active MS showed a significant increase in perforin expression (AFI) and cell activation markers (size, granularity) in CD4(dim+) cells.
Conclusions:
- CD4+ perforin (P)+ cells are upregulated in number and activation level during active multiple sclerosis (MS).
- These findings suggest a potential role for CD4+ cytotoxic cells in the pathogenesis of MS.
- The absence of CD25+P+ cells warrants further investigation into specific immune cell involvement.