KCNA3 and cancer: Iberiotoxin (IbTX), a 37-amino acid peptide derived from the venom of the scorpion Hottentotta tamulus (also known as Buthus tamulus or Mesobuthus tamulus), has emerged as a potent inhibitor of voltage-gated potassium channels, particularly Kv1.1 and Kv1.3, which are overexpressed in malignancies such as glioblastoma (U87), breast (MDA-MB-231), colon (LS174), cervical (HeLa), and ovarian (A2780) cancers [56,57,58].