Kv3.1b and Kv3.3 channel subunit expression in murine spinal dorsal horn GABAergic interneurones

► Kv3.1b and Kv3.3 expression was studied in dorsal horn GABAergic interneurones. ► Kv3.1b or Kv3.3 was most abundantly expressed in laminae I-III. ► Kv3.1b but not Kv3.3 was associated with GAD65 and GAD67 neurones. ► Capsaicin-induced c-fos expression was localized mainly to GAD65-GFP interneurones.