A kappa opioid receptor agonist, difelikefalin, improves acute kidney injury in experimental sepsis models - Yoshiharu Sawanobori; Daisuke Nakano; Hiroaki Kitamura; Kento Kitada; Takehiko Asaga; Norio Suzuki; Masayuki Yamamoto; Yuichi Ogino; Gotaro Shirakami; Akira Nishiyama (PLoS ONE, 2026)