Dec 23, 2019

NADPH diaphorase neuronal dystrophy in gracile nucleus, cuneatus nucleus and spinal trigeminal nucleus in aged rat

BioRxiv : the Preprint Server for Biology
Wei HouHuibing Tan

Abstract

NADPH-diaphorase (N-d) activity is commonly used to identify NOS-ergic neurons. In our previous study, N-d positive neuritic dystrophy and spheroid termed aging-related N-d Body is discovered in the lumbosacral spinal cord in the normal aging rats. Histological studies also reveal that N-d positive neurodegenerative changes occur in the gracile nucleus. We re-examined N-d activity in gracile nucleus in aged rat. We found N-d positive neuritic dystrophy and spheroid also occurred in the cuneatus nucleus and spinal trigeminal nucleus. Besides regular coronal section, longitudinal oriented dystrophic neurites were detected in the sagittal and horizontal section in gracile nucleus and dorsal column. We fziurther examined the medullary oblongata with regular classical histology including Golgi staining, immunocytochemistry of NOS and phosphorylated tau protein, neuronal tracing method with wheat germ agglutinin conjugated alexa-fluor-488 through sciatic nerve, and spinal cord transection at thoracic level. Most of N-d positive neuritic dystrophy and spheroid did not showed colocalization with NOS or phosphorylated tau protein. Neuronal tracing and spinal cord transection revealed that N-d dystrophic neurites in gracile nucleus origi...Continue Reading

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Mentioned in this Paper

Immunocytochemistry
Spinal Cord
Aging
Phosphorylation
Sagittal
Nadph Dehydrogenase Activity
Detected (Finding)
Study
Transverse Plane
Coronal

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