Immunocytochemical detection of 5'-bromodeoxyuridine in fluoro-gold- labeled neurons: a simple technique to combine retrograde axonal tracing and neurogenetic characterization of neuronsE Soriano, JA Del Rio, FJ Martinez-Guijarro, I Ferrer and C Lopez Unidad de Biologia Celular, Facultad de Biologia, Universidad de Barcelona, Spain. To characterize the axonal projections of 5'-bromodeoxyuridine (BrdU)- labeled neurons, we have combined retrograde tracer injection of Fluoro- Gold with the immunocytochemical detection of BrdU. Pregnant mice were labeled with pulses of BrdU at embryonic days E12, E13, E14, or E16. Young adult offspring were perfused with 4% paraformaldehyde 2 days after receiving a Fluoro-Gold injection into the cerebral cortex, thalamus, or hippocampus. Brain sections were processed for immunocytochemical visualization of BrdU using the peroxidase-anti- peroxidase method and a diaminobenzidine-nickel ammonium sulfate (DAB- Ni) reaction, and finally observed on a microscope equipped with brightfield and fluorescence optics. Both BrdU-immunoreactive nuclei and retrogradely labeled Fluoro-Gold-positive cells were detected. Double-labeled neurons were recognized by the presence of fluorescent particles in the cytoplasm and a black immunoreactive nucleus. Since both labelings occurred in different cell compartments, Fluoro-Gold granules were not obscured by the DAB-Ni precipitate. The method shown here permits a correlation of the neurogenesis of subsets of neurons identified by their BrdU content with the specific target into which such cells project.
Volume 39,
Issue 11,
pp. 1565-1570,
11/01/1991
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H. Dong, C. A. Csernansky, B. Goico, and J. G. Csernansky Hippocampal Neurogenesis Follows Kainic Acid-Induced Apoptosis in Neonatal Rats J. Neurosci., March 1, 2003; 23(5): 1742 - 1749. [Abstract] [Full Text] [PDF] |
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