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Mechanism of pyloric contraction and relaxation after pylorus preserving gastrectomy

Research Project

Project/Area Number 13671280
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Digestive surgery
Research InstitutionGunma University

Principal Investigator

MOCHIKI Erito  Gunma University, Faculty of Medicine, Instructor, 医学部, 助手 (80312883)

Co-Investigator(Kenkyū-buntansha) TAKAHASHI Atsushi  Gunma University, Faculty of Medicine, Associate Professor, 医学部, 助教授 (00323337)
KUWANO Hiroyuki  Gunma University, Faculty of Medicine, Professor, 医学部, 教授 (90186560)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2003: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2002: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2001: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordspylorus / motility / force transducer / dog / relaxation / PPG / phase III / IMC / 筋間神経層 / 筋間神経叢
Research Abstract

Our study aimed at (1)measuring pyloric relaxation correctly and (2)determining the role of the intrinsic and extrinsic neural pathway in pyloric relaxation. Second aim of this study is to examine gastropyloric motility after pylorus-preserving gastrectomy (PPG) and to determine the influence of the pyloric branch of the vagus nerve. (Methods) Seven groups of dogs were used : five dogs had an intact gastrointestinal tract (control group) ; five dogs had transection and re-anastomosis of the antrum 3cm proximal to the pylorus (antral transection group) ; five dogs had extrinsic pyloric denervation (denervation group) ; five dogs had transection and re-anastomosis of the antrum with extrinsic pyloric ring denervation (transection with denervation group) ; five dogs had truncal vagotomy (vagotomy group) ; five dogs had PPG with preservation of the pyloric branch of the vagus (PPPG) ; and five dogs had PPG with resection of the pyloric branch of the vagus (RPPG). Gastropyloroduodenal motility was recorded by a strain-gauge force transducer in conscious dogs. (Results) In the control and denervation groups, pyloric relaxation was observed only during phase III of the interdigestive migrating motor complex. In the antral transection, transection with denervation, and vagotomy groups, pyloric relaxation was not observed in either the interdigestive or the postprandial state. The frequency of pyloric contractions increased in these groups in comparison with the control group. No significant differences were found between PPPG and RPPG in gastropyloroduodenal motility during either the interdigestive or postprandial state. (Conclusion) Results suggest that pyloric relaxation occurred during phase III to expel undigested particles from the stomach and that descending antral intramural pathways play an important role in the control of pyloric relaxation. Furthermore, it is not necessary to preserve the pyloric branch of the vagus for gastropyloroduodenal motility after PPG.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] Mochiki E, Kuwano H: "Gastrointestinal recovery and outcome after laparoscopy-assisted versus conventional open distal gastrectomy for early gastric cancer."World Journal of Surgery. 29.9. 1145-1149 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mochiki E, Kuwano H: "Barostat examination of proximal site of the anastomosis in patients with rectal cancer after low anterior resection."World Journal of Surgery. 25.11. 1377-1382 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mochiki E, Kuwano H: "Pyloric relaxation regulated via intramural neural pathway of the antrum."Digestive Disease and Science. 46.11. 2307-2313 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakabayashi T, Mochiki E, Kuwano H: "Erythromycin induces pyloric relaxation accompanied by a contraction of the gastric body after pylorus-preserving gastrectomy."Surgery. 133.6. 647-655 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakabayashi T, Mochiki E, Kuwano H: "Pyloric motility after pylorus-preserving gastrectomy with or without the pyloric branch of the vagus nerve."World Journal of Surgery. 26.5. 577-583 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakabayashi T, Mochiki E, Kuwano H: "Gastropyloric motor activity and the effects of erythromycin given orally after esophagectomy."American Journal of Surgery. 183.3. 317-323 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mochiki E, Kuwano H, Nakabayashi T, Garcia M, Haga N, Asao T.: "Pyloric relaxation regulated via intramural neural pathway of the antrum"Dig Dis Sci. 46. 2307-2313 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mochiki E, Nakabayashi T, Suzuki H, Haga N, Fujita K, Asao T, Kuwano H.: "Barostat examination of proximal site of the anastomosis in patients with rectal cancer after low anterior resection."World J Surg. 25. 1377-1382 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mochiki E, Kamimura H, Haga N, Asao T, Kuwano H.: "The technique of laparoscopically assisted total gastrectomy with jejunal interposition for early gastric cancer."Surg Endosc. 16. 540-544 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakabayashi T, Mochiki E, Garcia M, Haga N, Kato H, Suzuki T, Asao T, Kuwano H.: "Gastropyloric motor activity and the effects of erythromycin given orally after esophagectomy."Am J Surg. 183. 317-323 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakabayashi T, Mochiki E, Garcia M, Haga N, Suzuki T, Asao T, Kuwano H.: "Pyloric motility after pylorus-preserving gastrectomy with or without the pyloric branch of the vagus nerve."World J Surg. 26. 577-583 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mochiki E, Nakabayashi T, Kamimura H, Haga N, Asao T, Kuwano H.: "Gastrointestinal recovery and outcome after laparoscopy-assisted versus conventional open distal gastrectomy for early gastric cancer."World J Surg. 26. 1145-1149 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakabayashi T, Mochiki E, Kamiyama Y, Haga N, Asao T, Kuwano H.: "Erythromycin induces pyloric relaxation accompanied by a contraction of the gastric body after pylorus-preserving gastrectomy"Surgery. 133. 647-655 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Kuwano H, Mochiki E, Asao T, Kato H, Shimura T, Tsutsumi S.: "Double endoscopic intraluminal operation for upper digestive tract diseases : proposal of a novel procedure."Ann Surg. 239. 22-27 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Suzuki H, Kuwano H, Mochiki E, Haga N, Shimura T, Nomoto K, Tanaka T, Mizumoto A, Itoh Z.: "Effect of motilin on endogenous release of insulin in conscious dogs in the fed state."Dig Dis Sci. 48. 2263-2270 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mochiki E, Kuwano H, Katoh H, Asao T, Oriuchi N, Endo K.: "Evaluation of 18F-2-deoxy-2-fluoro-d-glucose Positron Emission Tomography for Gastric Cancer."World J Surg. 28. 247-253 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mochiki E, Kuwano H: "Gastrointestinal recovery and outcome after laparoscopy-assisted versus conventional open distal gastrectomy for early gastric cancer."World Journal of Surgery. 29.9. 1145-1149 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Mochiki E, Kuwano H: "Barostat examination of proximal site of the anastomosis in patients with rectal cancer after low anterior resection."World Journal of Surgery. 25.11. 1377-1382 (2001)

    • Related Report
      2003 Annual Research Report
  • [Publications] Mochiki E, Kuwano H: "Pyloric relaxation regulated via intramural neural pathway of the antrum."Digestive Disease and Science. 46.11. 2307-2313 (2001)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakabayashi T, Mochiki E, Kuwano H: "Erythromycin induces pyloric relaxation accompanied by a contraction of the gastric body after pylorus-preserving gastrectomy"Surgery. 133.6. 647-655 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakabayashi T, Mochiki E, Kuwano H: "Pyloric motility after pylorus-preserving gastrectomy with or without the pyloric branch of the vagus nerve."World Journal of Surgery. 26.5. 577-583 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakabayashi T, Mochiki E, Kuwano H: "Gastropyloric motor activity and the effects of erythromycin given orally after esophagectomy."American Journal of Surgery. 183.3. 317-323 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Mochiki E, Kuwano H: "Pyloric relaxation regulated via intramural neural pathway of the antrum"Digestive disease and science. 46,11. 2307-2313 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Mochiki E, Kuwano H: "Barostat examination of proximal site of the anastomosis in patients with rectal cancer after low anterior resection"World Journal of Surgery. 25,11. 1377-1382 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Mochiki E, Kuwano H: "The technique of laparoscopically assisted total gastrectomy with jejunal interposition for early gastric cancer"Surgical Endoscopy. 16,3. 540-544 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nakabayashi T, Mochiki E: "Gastropyloric motor activity and the effects of erythromycin given orally after esophagectomy"American Journal of Surgery. 183,3. 317-323 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nakabayashi T, Mochiki E: "Pyloric motility after pylorus-preserving gastrectomy with or without the pyloric branch of the vagus nerve"World Journal of Surgery. 26,5. 577-583 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Mochiki E, Kuwano H: "Gastrointestinal Recovery and Outcome after Laparoscopy-assisted versus Conventional Open Distal Gastrectomy for Early Gastric Cancer"World Journal of Surgery. 26,9. 1145-1149 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Mochiki E, Kuwano H: "Pyloric relaxation regulated via intramural neural pathway of the antrum"Digestive disease and science. 46,11. 2307-2313 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Mochiki E, Kuwano H: "Barostat examination of proximal site of the anastomosis in patients with rectal cancer after low anterior resection"World Journal of Surgery. 25,11. 1377-1382 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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