A protocol for collection and infusion of cerebrospinal fluid in mice

Here, we provide a step-by-step protocol for the collection and intracerebroventricular infusion of cerebrospinal fluid (CSF) in mice. We describe steps to withdraw CSF quickly and abundantly while avoiding blood contamination. Using the Lynch coil technique, we gain functional insights into the collected CSF by slowly infusing minimal amounts of CSF directly to the lateral ventricles of aged mice. This protocol is versatile and can be used to infuse drugs, antibodies, or scarce biological compounds. For complete details on the use and execution of this protocol, please refer to Iram et al. (2022).1 [Display omitted] •Withdrawal of mouse cerebrospinal fluid (CSF) from the cisterna magna•Quality control of CSF to detect blood contamination•Intracerebroventricular infusion of CSF using a micro-osmotic pump•Detailed guide for the Lynch coil technique for delivery of scarce biological compounds Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics. Here, we provide a step-by-step protocol for the collection and intracerebroventricular infusion of cerebrospinal fluid (CSF) in mice. We describe steps to withdraw CSF quickly and abundantly while avoiding blood contamination. Using the Lynch coil technique, we gain functional insights into the collected CSF by slowly infusing minimal amounts of CSF directly to the lateral ventricles of aged mice. This protocol is versatile and can be used to infuse drugs, antibodies, or scarce biological compounds.