How to disable a databound ListBox item based on a property value?

Does anyone know if and how one can disable items in a databound ListBox based on the value of a property?

Preferably I would like a DataTrigger which, when a certain property is false, disables this item (make it impossible to select) without affecting other items in the ListBox.

<ListBox>
  <ListBox.ItemTemplate>
    <DataTemplate>
      <TextBlock Name="textBlock" Text="{Binding Description}"/>
      <DataTemplate.Triggers>
        <DataTrigger Binding="{Binding IsEnabled}" Value="False">
          ??
        </DataTrigger>
      </DataTemplate.Triggers>
    </DataTemplate>
  </ListBox.ItemTemplate>
</ListBox>