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• W2008283573 endingPage "596" @default.
• W2008283573 startingPage "589" @default.
• W2008283573 abstract "To date, few studies have systematically evaluated the most appropriate location for grafting catecholaminergic cells as a potential treatment for Parkinson's disease (PD). The following study was conducted to determine 1) if placement of catecholamine-secreting encapsulated PC12 cells into the lateral ventricle of 6-OHDAtreated rats is as effective as intrastriatal implants on reducing apomorphine-induced rotational behavior, and 2) to determine if the survival of encapsulated PC12 cells is differentially affected by the implant site. Polymer-encapsulated PC12 cells were implanted into either the striatum or lateral ventricle of unilateral 6-OHDA-lesioned rats. Animals were tested for apomorphine-induced rotations over a 6-wk period. Only those animals that received intrastriatal implants of encapsulated PC12 cells showed a reduction in rotation behavior. Moreover, removal of the devices from the striatum resulted in a return to preimplant rotation levels. Postexplant neurochemical analyses demonstrated that the potassium-evoked L-dopa device output increased in vivo while the potassium-evoked dopamine output from the devices decreased over time in vivo. The location of the implant significantly affected catecholamine output from the PC12 cell-loaded devices. The increase in potassium-evoked L-dopa output was greatest, as was the decrease in potassium-evoked dopamine output, from those devices implanted in the striatum. Basal output of dopamine and DOPAC was also significantly higher from devices explanted from the lateral ventricle. These results demonstrate that the continued presence of intrastriatal implants of encapsulated PC12 cells is required to maintain the behavioral effects in 6-OHDA-lesioned rats. In addition, the site of implantation appears to affect device output. These results provide additional support for intrapa-renchymal delivery of L-dopa and dopamine via polymer encapsulation as a possible treatment for PD." @default.
• W2008283573 created "2016-06-24" @default.
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• W2008283573 date "1996-10-01" @default.
• W2008283573 modified "2023-09-23" @default.
• W2008283573 title "Continued presence of intrastriatal but not intraventricular polymer-encapsulated PC12 cells is required for alleviation of behavioral deficits in Parkinsonian rodents" @default.
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• W2008283573 doi "https://doi.org/10.1016/0963-6897(96)00086-3" @default.
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