Effects of Taekunyukmijiwhang-tang on Blood Pressure and Renal function in NO-dependent Hypertensive Rats

택군육미지황탕이 산화질소의존형 고혈압백서의 혈압과 신장기능에 미치는 영향

  • Sohn Eun Jin (Department of Herbal Resources, Professional Graduate School of Oriental Medicine) ;
  • Kang Dae Gill (Department of Herbal Resources, Professional Graduate School of Oriental Medicine) ;
  • Noh Suk Yeon (Department of Herbal Resources, Professional Graduate School of Oriental Medicine) ;
  • Lee An Sook (Department of Herbal Resources, Professional Graduate School of Oriental Medicine) ;
  • Yin Ming Hao (Department of Herbal Resources, Professional Graduate School of Oriental Medicine) ;
  • Moon Mi Kyung (Department of Herbal Resources, Professional Graduate School of Oriental Medicine) ;
  • Yun Young Gab (College Oriental Medicine University) ;
  • Lee Ho Sub (Department of Herbal Resources, Professional Graduate School of Oriental Medicine)
  • 손은진 (원광대학교 한의학전문대학원 한약자원개발학과) ;
  • 강대길 (원광대학교 한의학전문대학원 한약자원개발학과) ;
  • 노숙연 (원광대학교 한의학전문대학원 한약자원개발학과) ;
  • 이안숙 (원광대학교 한의학전문대학원 한약자원개발학과) ;
  • 윤명호 (원광대학교 한의학전문대학원 한약자원개발학과) ;
  • 문미경 (원광대학교 한의학전문대학원 한약자원개발학과) ;
  • 윤용갑 (한의과대학 한의학과) ;
  • 이호섭 (원광대학교 한의학전문대학원 한약자원개발학과)
  • Published : 2004.02.01

Abstract

The present study examined the effects of Taekunyukmijiwhang-tang (TV) on blood pressure and renal function in nitric oxide (NO)-dependent hypertensive rats. A phamacological inhibition of nitric oxide synthase (NOS) for 4-6 weeks produces renal vasoconstriction, renal dysfunction, and progressive severe hypertension. Treatment of rats with NG-Nitro-L-arginie methylester (L-NAME) (100 mg/L, 6 weeks), which is a nonspecific NOS inhibitor, cause a sustained increase in systolic blood pressure (SBP), along with the decrease in expression of ecNOS in the kidney and thoracic aorta. The expression of Na, K-ATPase α1 subunit in the kidney was also reduced in the L-NAME induced hypertensive rats group. The renal functional parameters including urine osmolality (Uosm), creatinine clearance (Ccr), which is an index of glomerular filtration (GFR) were decreased in rat with L-NAME induced hypertension. while solute-free water reabsoption (TcH₂O) was unchanged in all experimental group. However, the group combined treated with TV and L-NAME did not develop hypertension and expression of ecNOS in the aorta was restored. The expression of Na/sup +/, K/sup +/-ATpase α1 subunit in the kidney was markedly restored in L-NAME-induced hypertension rats by administration of TV along with the restoration of urinary volume (UV) and sodium excretion (UNaV), whlie Na/sup +/, K/sup +/-ATPase /β1 subunit was not altered. These results suggest that TV attenuates an increase in SSP in the L-NAME induced hypertension and restores partially renal function, which seems to be caused by up-regulation of expression of Na/sup +/, K/sup +/-ATPase α1 subunit in the kidney and ecNOS in thoracic aorta.

Keywords

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