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Nogo-A expression in mouse central nervous system neurons
Haiping Liu1, Cherry E L Ng, Bor Luen Tang
1NCA laboratory, Institute of Molecular and Cell Biology, 30 Medical Drive, Singapore, Singapore.
Neuroscience Letters
|July 31, 2002
Summary
Nogo-A, a central nervous system (CNS) protein, is newly found in CNS neurons, not just oligodendrocytes. This discovery suggests Nogo-A may have additional functions within neurons beyond inhibiting neurite growth.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Nogo-A is a major inhibitor of neurite growth in the central nervous system (CNS).
- Previous studies indicated Nogo-A expression is primarily localized to oligodendrocytes.
Purpose of the Study:
- To investigate the expression of Nogo-A in CNS neurons.
- To identify potential novel roles of Nogo-A in neuronal function.
Main Methods:
- Utilized a specific antibody against Nogo-A (amino acids 223-399).
- Performed Western blot analysis on rat brain and neuroblastoma cell lysates.
- Conducted immunofluorescence studies on neuroblastoma cell lines (SH-SY5Y, NIE-115) and mouse CNS tissue.
Main Results:
- Confirmed Nogo-A expression in the cell bodies of specific CNS neurons, distinct from oligodendrocytes.
- Detected a 220 kDa Nogo-A protein band in rat brain and neuroblastoma lysates.
- Immunofluorescence showed Nogo-A localized to the endoplasmic reticulum in neuroblastoma cells and in specific neuronal populations within the mouse CNS.
Conclusions:
- Provides conclusive evidence for Nogo-A expression in CNS neurons.
- Suggests Nogo-A may possess endogenous roles within neurons independent of its neurite growth inhibitory function.