Modified enzyme which target to neuronal cells to cross blood brain barrier

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MODIFIED ENZYME WHICH TARGFRS TO NEURONAL CELLS TO CROSS BLOOD BRAIN BARRIERWe tried to prepare modified placental glucocerebrosidase treated with neuraminidase and galactosidase and mumose terminal glucocerebrosidase was injected intravenously into mouse. We chased enzyme activities of glucocerebrosidase in mouse brain, Ever, kidney and other tissues. The maximum activity of the enzyme was obtkned after 15 minute injection, and significant staining of-enzyme-activity was found in the brain. These data suggest that mamose terminated enyzme could be useful for the treatment of neuronopathic Gaucher disease. Liposomes prepared from lecithincholesterol- aminophenylmwmoside (7 : 2 : 1) were efficiently incorporated into mouse brain across the blood brain barrier. Furthermore, hposomes injected intraperitoneauy were exclussively distributed into lysosome rich fraction and taken up by glial cells. These data suggest that blood brain barrier cells and glial cells recognize mannose and can be used for the treattnent of brain damage by lysosomat storage disease.