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Organotypic brain slices are three-dimensional 150 µm-thick sections of a postnatal day 10 mouse and can be cultured for several weeks in vitro. In such brain slices the complex cellular connections are preserved with a high viability. These brain slices can be connected to collagen-loaded microcontact prints to develop a simple brain-on-a-chip model. Using the microcontact printing technique, many peptides or proteins can be printed onto a semipermeable membrane and linked to brain slices. On these microcontact prints, brain-derived nerve fibers grow out, or microglia can get activated and migrate out, or also new brain vessels can be formed. Such a brain-on-a-chip model may allow to develop new drugs or a diagnostic method for neurodegenerative diseases.
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http://dx.doi.org/10.1016/j.jneumeth.2023.109979 | DOI Listing |
J Neurophysiol
September 2025
Department of Neurosurgery, University of Utah School of Medicine, Salt Lake City, UT, USA.
Although glutamatergic and GABAergic synapses are important in seizure generation, the contribution of non-synaptic ionic and electrical mechanisms to synchronization of seizure-prone hippocampal neurons remains unclear. Here, we developed a physiologically relevant model to study these mechanisms by inducing prolonged seizure-like discharges (SLDs) in hippocampal slices from male rats through modest, sustained ionic manipulations. Specifically, we reduced extracellular calcium to 0.
View Article and Find Full Text PDFJCI Insight
September 2025
Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan, USA.
Patients with Dravet syndrome (DS) present with severe, spontaneous seizures and ataxia. While most patients with DS have variants in the sodium channel Nav1.1 α subunit gene, SCN1A, variants in the sodium channel β1 subunit gene, SCN1B, are also linked to DS.
View Article and Find Full Text PDFJ Cell Biol
November 2025
Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.
Two major protein recycling pathways have emerged as key regulators of enduring forms of synaptic plasticity, such as long-term potentiation (LTP), yet how these pathways are recruited during plasticity is unknown. Phosphatidylinositol-3-phosphate (PI(3)P) is a key regulator of endosomal trafficking and alterations in this lipid have been linked to neurodegeneration. Here, using primary hippocampal neurons, we demonstrate dynamic PI(3)P synthesis during chemical induction of LTP (cLTP), which drives coordinate recruitment of the SNX17-Retriever and SNX27-Retromer pathways to endosomes and synaptic sites.
View Article and Find Full Text PDFiScience
September 2025
Biophysics Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Hessen, Germany.
Efforts to efficiently target brain tumors are constrained by the dearth of appropriate models to study tumor behavior toward treatment approaches as well as potential side effects to the surrounding normal tissue. We established a reproducible cerebral organoid model of brain tumorigenesis in an autologous setting by overexpressing , a common oncogene in brain tumors. GFP/c-MYC cells were isolated from tumor organoids and used in two different approaches: GFP/c-MYC cells co-cultured with cerebral organoid slices or fused as spheres to whole organoids.
View Article and Find Full Text PDFHum Brain Mapp
September 2025
Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Perinatal stroke is a vascular injury occurring early in life, often resulting in motor deficits (hemiplegic cerebral palsy/HCP). Comorbidities may also include poor neuropsychological outcomes, such as deficits in memory. Previous studies have used resting state functional MRI (fMRI) to demonstrate that functional connectivity (FC) within hippocampal circuits is associated with memory function in typically developing controls (TDC) and in adults after stroke, but this is unexplored in perinatal stroke.
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