AQP8 and adenoma: WJW increased/normalized the expression of key epithelial transport proteins involved in Na<sup>+</sup>/Cl<sup>-</sup> absorption and water handling, including sodium/hydrogen exchanger 3 (NHE3), epithelial sodium channel (ENaC), downregulated in adenoma (DRA), aquaporin-3 (AQP3), and aquaporin-8 (AQP8).