GJA1 and Parkinsonism: Considering that experimental parkinsonism induces a large increase in astrocytic volume and that astrocytes are organized into functional networks through interconnection via intercellular GJs composed of Cx (Giaume and Mccarthy, 1996; Nagy et al., 1999; Dermietzel et al., 2000), we sought to determine if expression pattern and density of Cx30 and Cx43 connexins were affected by DA depletion.