Journal of neuroscience methods · 2026
Adaptation of the Shokunbi et al. modified Golgi-Cox for assessing dendritic injury in the hypothalamus: A protocol for hydrocephalus research.
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Sunday Emmanuel Garba
Аннотация
BACKGROUND: Dendritic injury in the hypothalamic paraventricular nucleus (PVN) contributes to neuroendocrine dysfunction in hydrocephalus, but reliable protocols for visualizing dendritic architecture in this region are limited. Standard Golgi-Cox methods often yield inconsistent impregnation in the small, periventricular hypothalamus of juvenile rats.
NEW METHOD: We adapted the modified Golgi-Cox protocol developed at the Anatomy Laboratory, University of Ibadan, by Shokunbi et al., for the hypothalamus of juvenile rats with kaolin-induced hydrocephalus. Key modifications include reduction of tissue block size to 3 mm, extension of impregnation to 14 days, and use of gelatin-coated slides to prevent detachment. Fresh tissue blocks containing the PVN were processed, sectioned at 100 µm, and analyzed using Neurolucida software.
RESULTS: The adapted protocol produced consistent, high-quality impregnation of PVN neurons with minimal background precipitate. Hydrocephalic rats showed significant dendritic simplification and a 32% reduction in spine density compared with controls (p < 0.01). The method enabled clear visualization and quantification of dendritic branching and spine loss across mild, moderate, and severe hydrocephalus.
COMPARISON WITH EXISTING METHODS: Compared to standard Golgi-Cox protocols, our adaptation improves impregnation consistency and resolution in the juvenile rat hypothalamus, reduces background artifact, and allows sampling of the PVN without tissue distortion. Unlike immunohistochemistry, it does not require antigen-specific antibodies and provides complete visualization of individual neurons for unbiased morphometry.
CONCLUSIONS: This adapted Golgi-Cox protocol provides a reproducible and sensitive method for assessing dendritic injury in the hypothalamus of hydrocephalic rats. It is suitable for mechanistic studies of neuroendocrine dysfunction and can be adapted for other periventricular pathologies.
NEW METHOD: We adapted the modified Golgi-Cox protocol developed at the Anatomy Laboratory, University of Ibadan, by Shokunbi et al., for the hypothalamus of juvenile rats with kaolin-induced hydrocephalus. Key modifications include reduction of tissue block size to 3 mm, extension of impregnation to 14 days, and use of gelatin-coated slides to prevent detachment. Fresh tissue blocks containing the PVN were processed, sectioned at 100 µm, and analyzed using Neurolucida software.
RESULTS: The adapted protocol produced consistent, high-quality impregnation of PVN neurons with minimal background precipitate. Hydrocephalic rats showed significant dendritic simplification and a 32% reduction in spine density compared with controls (p < 0.01). The method enabled clear visualization and quantification of dendritic branching and spine loss across mild, moderate, and severe hydrocephalus.
COMPARISON WITH EXISTING METHODS: Compared to standard Golgi-Cox protocols, our adaptation improves impregnation consistency and resolution in the juvenile rat hypothalamus, reduces background artifact, and allows sampling of the PVN without tissue distortion. Unlike immunohistochemistry, it does not require antigen-specific antibodies and provides complete visualization of individual neurons for unbiased morphometry.
CONCLUSIONS: This adapted Golgi-Cox protocol provides a reproducible and sensitive method for assessing dendritic injury in the hypothalamus of hydrocephalic rats. It is suitable for mechanistic studies of neuroendocrine dysfunction and can be adapted for other periventricular pathologies.