Hypothalamic Slice Preparation
Hypothalamic Slice Preparation - Related Videos
09:14
Imaging Calcium Responses in GFP-tagged Neurons of Hypothalamic Mouse Brain Slices
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Cited by 5 •
2012
In this protocol, we update recent progress in imaging Ca2+ signals of GFP-tagged neurons in brain tissue slices using a red fluorescent Ca2+ indicator dye.
09:30
Dual Somatic Recordings from Gonadotropin-Releasing Hormone (GnRH) Neurons Identified by Green Fluorescent Protein (GFP) in Hypothalamic Slices
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Cited by 3 •
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Activity in neuronal systems often requires synchronous action potential discharges from neurons within a specific population. For example, pulses of gonadotropin-releasing hormone (GnRH) likely require coordinated activity between GnRH neurons. We present our methodological approach for reliably obtaining simultaneous electrophysiological recordings from the diffusely distributed GnRH neurons.
01:37
Hypothalamic-Pituitary Axis
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2019
The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor. What Happens During Stress In response to stress, the neurons in the hypothalamus release...
08:12
Thin Sectioning of Slice Preparations for Immunohistochemistry
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Cited by 7 •
2007
The present method allows reproducible cryostat sectioning of small, difficult-to-manage, tissue pieces, such as biopsies and brain slices. We utilize a simple aluminum freezing stage to facilitate handling of tissue and a standard cryostat to routinely produce 5-10 micron serial sections from 400 micron thick brain slices.
11:16
Preparation and Culture of Chicken Auditory Brainstem Slices
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Cited by 17 •
2011
The chicken auditory brainstem is comprised of nuclei responsible for binaural sound processing. A single coronal slice preparation maintains the entire circuitry while the cultured approach provides a unique preparation to study the development of neuronal structure and auditory function at the molecular, cellular and network levels.
FAQs
Chilling the tissue and supplying oxygenated physiological solution help maintain viable hypothalamic sections after rapid brain removal. These conditions support preservation during preparation, allowing the resulting slices to retain functional cellular properties for controlled experiments. This is essential when measurements depend on neural or neuroendocrine activity rather than fixed anatomy alone.
Vibratome sectioning limits the mechanical damage that can occur while producing thin hypothalamic sections. By reducing disruption during cutting, it helps preserve local neuronal connections and cellular organization within the slice. That preservation supports circuit-level experiments, including electrophysiology, calcium imaging, pharmacological testing, and targeted stimulation of defined hypothalamic regions.
Preserving local neuronal connections and cellular organization allows investigators to examine hypothalamic activity in a tissue context rather than treating cells as isolated components. This organization is especially relevant for studying how neural signals relate to neuroendocrine function. It also supports targeted stimulation and measurements within circuits involved in feeding, stress, reproduction, thermoregulation, and hormone release.
A basic workflow starts with rapid brain removal, followed by maintenance of the tissue in a chilled, oxygenated physiological solution. Researchers then use a vibratome to produce thin sections while limiting mechanical damage. The prepared slices can subsequently be placed into controlled experiments designed to measure activity, test pharmacological effects, image calcium signals, or stimulate selected circuits.
These slices support electrophysiology, calcium imaging, pharmacological experiments, and targeted stimulation. Electrophysiology examines electrical activity, whereas calcium imaging provides a way to monitor calcium signals; pharmacological experiments test responses to applied compounds, and targeted stimulation probes selected hypothalamic circuits. Together, these approaches let researchers study cellular responses under controlled conditions while retaining relevant local organization.
They provide a bridge between cellular measurements and broader physiological processes because researchers can access defined hypothalamic regions while controlling the experimental environment. This makes the preparation useful for investigating circuits associated with feeding, stress, reproduction, thermoregulation, and hormone release. Findings can therefore connect activity observed in local tissue with major neural and neuroendocrine functions.