We created a Parkinson’s disease (PD) mouse harbouring the disease-associated point mutation R1441C in the GTPase domain of the endogenous murine Lrrk2 gene. No pathological signs of neurodegeneration can be observed in aged animals. Nevertheless, on the behavioural level we could identify several alterations reminiscent of premotor symptoms observed in PD like reduced olfaction and subtle gait alterations. Interestingly, also the analysis of a Lrrk2 knockdown mouse line did show nearly identical behavioural alterations. In vitro studies could provide hints for a role of the protein in cytoskeleton organisation as well as synaptic transmission, albeit the constitutive expression of pathogenic LRRK2 on an endogenous level seems to be compensated to a large extend. Together, both lines nicely recapitulate non-motor disturbances observed in PD patients and can therefore be seen as valid mouse models of presymptomatic Parkinson’s disease.
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We created a Parkinson’s disease (PD) mouse harbouring the disease-associated point mutation R1441C in the GTPase domain of the endogenous murine Lrrk2 gene. No pathological signs of neurodegeneration can be observed in aged animals. Nevertheless, on the behavioural level we could identify several alterations reminiscent of premotor symptoms observed in PD like reduced olfaction and subtle gait alterations. Interestingly, also the analysis of a Lrrk2 knockdown mouse line did show nearly identica...
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