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1991 Fiscal Year Final Research Report Summary

Involvement of Vagal and Sympathetic Afferents on Reflex Renal Nerve Responses to Bile into Canine Pancreatic Duct

Research Project

Project/Area Number 02807111
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field General surgery
Research InstitutionShinshu University School of Medicine

Principal Investigator

SHIBAMOTO Toshishige  Shinshu Univ. School of Med. Dept. of Physiol. Instructor, 医学部・第二生理, 講師 (90178921)

Co-Investigator(Kenkyū-buntansha) KOYAMA Shozo  Shinshu Univ. School of Med. Dept. of Physiol. Professor, 医学部・第二生理, 教授 (00115346)
UEMATSU Harumitsu  Shinshu Univ. School of Med. Dept. of Physiol. Assistant, 医学部・第二生理, 助手 (30211072)
Project Period (FY) 1989 – 1991
KeywordsRenal nerve activity / Bile / Sympathetic afferents / Vagal afferents / Pancreatic duct / Capsaicin / Bradykinin
Research Abstract

This study was designed to study effects of an injection of bile into the Pancreatic duct on mean blood pressure (MBP) and efferent renal nerve activity (RNA) in anesthetized dogs. When 0.5ml/kg of bile was injected into the pancreatic duct, RNA and MBP increased significantly. Peak changes of MBP and RNA were +26 <plus-minus> 8mmHg and +174 <plus-minus> 13%, respectively. When capsaicin (15ug/Kg) and bradykinin (20ug/Kg) were injected into the pancreatic duct, RNA increased significantly so that peak changes in RNA were +86<plus-minus> 11% and +72 <plus-minus> 12% of the control level, respectively. Injection of physiological saline did not cause any significant change in RNA and MBP. However, either after denervation of subdiaphragmatic vagal nerves or after celiac and superior mesenteric sympathectomy, the increase in RNA after injection of bile were significantly smaller than that in the intact animals. Contrastingly, the increased RNA due to capsaicin and bradykinin remained after subdiaphragmatic vagotomy, but disappeared after sympathectomy. In dogs with subdiaphragmatic vagotomy combined with celiac and superior mesenteric sympathectomy, RNA did not change significantly after bile injection. Therefore, these results suggest that injection of bile into the canine pancreatic duct evokes a reflex increase in RNA. which is mediated by both the vagal and sympathetic afferents from the pancreas. However, increases in RNA due to capsaicin and bradykinin are mediated only by sympathetic af

  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] Takashi Fujita: "Reflex effcts on renal nerve activity and renal vasculartone during occlusion of superior mesenteic artery in anestheized dogs." J.Autonomic Nervous System. 29. 129-136 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Harumitsu UEMATSU: "INVOLVEMENT OF VAGAL AND SYMPATHETIC AFFERENTS ON REFLEX RENAL NERVE RESPONSES TO BILE.CAPSAICIN AND BRADYKININ INTO CANINE PANCREATIC DUCT" Jpn.J.Physiol.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 上松 陽光: "自家胆汁の膵管内投与による反射性腎臓交感神経反応" 自律神経. 27. 504-511 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Fujita et al: "Reflex effects on renal nerve activity and renal vascular tone during occlusion of superior mesenteric artery in anesthetized dogs" J Autonomic Nervous System. 29. 129-136 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Uematsu et al: "Involvement of vagal and sympathetic afferents on reflex renal nerve responses to bile, capsaicin and bradykinin into the canine pancreatic duct" Jpn J Physiol.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-16  

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