Astrocyte’s gap junctions

Rat brain slice experiments.

  1. Fig. 1. Patch-clamp of the cell bodies of two nearby astrocytes that send processes to the same blood vessel. Difference of interference contrast (DIC) infrared image.

Fig. 2. Concatenated recording of a gap-junction current between two astrocytes. 10 mM Cs+ ion, being added to ACSF (the external solution), blocks potassium channels on the external membrane of astrocytes, reducing the leak current, leading to the augmentation of gap junction current. Addition to ACSF of gap-junction blocker (18 β GlcrA) drastically reduce gap junction current.