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CD59 expression and complement susceptibility of human neuronal cell line (NTera2)
C Agoropoulou1, M G Wing, A Wood
1Molecular immunopathology Unit, Medical Research Council, Cambridge, UK.
Neuroreport
|April 10, 1996
Summary
Neuronal cells are susceptible to complement-mediated lysis due to a lack of CD59. Complement activation and neuronal cell death were observed, but could be prevented by CD59 incorporation.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- The human complement system is a crucial part of innate immunity.
- Neuronal cells' susceptibility to complement activation is not fully understood.
- CD59 is a key inhibitor of the terminal complement cascade.
Purpose of the Study:
- To investigate the susceptibility of neuronal cells to human complement.
- To determine the role of CD59 in complement-mediated neuronal damage.
Main Methods:
- Utilized NTera2 cell line for neuronal differentiation.
- Immunocytochemistry to detect complement activation and CD59 expression.
- Cell viability assays and intracellular calcium measurements to assess complement-mediated lysis.
Main Results:
- Differentiated NTera2 neurons, but not stem cells, activated complement without antibodies.
- Neurons lacked CD59, an inhibitor of complement.
- Neurons were lysed by complement in human serum, indicated by reduced viability and increased calcium.
- Complement-mediated lysis was prevented by heat-inactivated serum or cobra venom factor.
- Incorporation of CD59 into neuronal membranes protected cells from lysis.
Conclusions:
- Neuronal cells are vulnerable to complement-mediated attack due to the absence of CD59.
- Complement activation can lead to neuronal cell death.
- CD59 plays a protective role against complement-induced neuronal damage.