Cannula Implantation into the Cisterna Magna of Rodents
| Autor: | Maiken Nedergaard, Iben Lundgaard, Nanhong Lou, Simon Sanggaard, Qianliang Li, Stephanie von Holstein-Rathlou, Natalie Linea Hauglund, Anna L.R. Xavier |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
General Chemical Engineering Rodentia Cisterna magna Article General Biochemistry Genetics and Molecular Biology Catheterization Mice 03 medical and health sciences 0302 clinical medicine Cerebrospinal fluid Interstitial fluid Cisterna Magna medicine Animals Cannula Perivascular space Syringe driver General Immunology and Microbiology Chemistry General Neuroscience Brain 030104 developmental biology medicine.anatomical_structure Glymphatic system Subarachnoid space 030217 neurology & neurosurgery Biomedical engineering |
| Zdroj: | Journal of Visualized Experiments. |
| ISSN: | 1940-087X |
| Popis: | Cisterna magna cannulation (CMc) is a straightforward procedure that enables direct access to the cerebrospinal fluid (CSF) without operative damage to the skull or the brain parenchyma. In anesthetized rodents, the exposure of the dura mater by blunt dissection of the neck muscles allows the insertion of a cannula into the cisterna magna (CM). The cannula, composed either by a fine beveled needle or borosilicate capillary, is attached via a polyethylene (PE) tube to a syringe. Using a syringe pump, molecules can then be injected at controlled rates directly into the CM, which is continuous with the subarachnoid space. From the subarachnoid space, we can trace CSF fluxes by convective flow into the perivascular space around penetrating arterioles, where solute exchange with the interstitial fluid (ISF) occurs. CMc can be performed for acute injections immediately following the surgery, or for chronic implantation, with later injection in anesthetized or awake, freely moving rodents. Quantitation of tracer distribution in the brain parenchyma can be performed by epifluorescence, 2-photon microscopy, and magnetic resonance imaging (MRI), depending on the physico-chemical properties of the injected molecules. Thus, CMc in conjunction with various imaging techniques offers a powerful tool for assessment of the glymphatic system and CSF dynamics and function. Furthermore, CMc can be utilized as a conduit for fast, brain-wide delivery of signaling molecules and metabolic substrates that could not otherwise cross the blood brain barrier (BBB). |
| Databáze: | OpenAIRE |
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