“…In the present study, therefore, adult MPS IIIA mice were administered with 10 µl of therapeutic lentivirus into each lateral ventricle, at an infusion rate of 0.25 µl/min. Currently, were are unaware of any other studies reporting the delivery of similarly large volumes to the brains of adult mice; however, we estimate that this dose would have increased the rate of flow of fluid the brain's circulatory systems needed to deal with by approximately 75%, which we considered to be tolerable considering that caffeine and forskolin can increase CSF production by 60% and 100%, respectively, without deleterious effects . This is because resorption of the CSF, mostly via the arachnoid granulations and villi, increases in response, and thereby normal intracranial pressure is maintained .…”