title: Effect of Hachimijiogan against Renal Dysfunction and Involvement of Hypoxia-Inducible Factor-1α in the Remnant Kidney Model.
abstract: In chronic renal failure, hypoxia of renal tissue is thought to be the common final pathway leading to end-stage renal failure. In this study the effects of hachimijiogan, a Kampo formula, were studied with respect to hypoxia-inducible factor (HIF). Using remnant kidney rats, we studied the effects of hachimijiogan on renal function in comparison with angiotensin II receptor blocker. The result showed that oral administration of hachimijiogan for seven days suppressed urinary protein excretion and urinary 8-OHdG, a marker of antioxidant activity, equally as well as oral administration of candesartan cilexetil. In contrast, the protein volume of HIF-1α in the renal cortex was not increased in the candesartan cilexetil group, but that in the hachimijiogan group was increased. In immunohistochemical studies as well, the expression of HIF-1α of the high-dose hachimijiogan group increased compared to that of the control group. Vascular endothelial growth factor and glucose transporter 1, target genes of HIF-1α, were also increased in the hachimijiogan group. These results suggest that hachimijiogan produces a protective effect by a mechanism different from that of candesartan cilexetil.
authors.affiliation: Department of Japanese Oriental Medicine, Graduate school of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Oka
authors.forename: Hirozo
authors.initials: H
authors.lastname: Goto
authors.forename: Keiichi
authors.initials: K
authors.lastname: Koizumi
authors.forename: Shin
authors.initials: S
authors.lastname: Nakamura
authors.forename: Koichi
authors.initials: K
authors.lastname: Tsuneyama
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhou
authors.forename: Michiko
authors.initials: M
authors.lastname: Jo
authors.forename: Takako
authors.initials: T
authors.lastname: Fujimoto
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Sakurai
authors.forename: Naotoshi
authors.initials: N
authors.lastname: Shibahara
authors.forename: Ikuo
authors.initials: I
authors.lastname: Saiki
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Shimada