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Thermogenesis induced by osmotic stimulation of intestines

Research Project

Project/Area Number 12670075
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental physiology (including Physical medicine and Nutritional physiology)
Research InstitutionNational Institute of Health and Nutrition

Principal Investigator

OSAKA Toshimasa  National Institute of Health and Nutrition, Senior Research Scientist, 栄養所要量研究部, 主任研究員 (30152101)

Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2000: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsDiet-induced thermogenesis / Osmolality / Intestines / Autonomic nervous system / Adrenaline / 浸透圧受容 / 食物成分の生理作用 / 交感神経系 / 迷走神経 / 浸透圧受容器
Research Abstract

Infusion of various nutrients and non-nutrients into the duodenum induced dose-dependent thermogenesis in urethane-anaesthetized rats. In contrast, infusion of 0.9% NaCl, distilled water, or safflower oil had no effect on the metabolic rate. Infusion of 7.2% urea induced a small and transient increase in the metabolic rate. These results suggested that the thermogenesis was caused mainly by changes in osmolality rather than by a specific action of the different solute molecules. Intravenous infusion of 3.6% NaCl induced a significantly smaller thermogenic response. Similarly, infusion of NaCl into the hepatic portal vein or the peritoneal cavity also produced a significantly small thermogenic response. These results suggested an intestinal or mesenteric location for osmoreceptors. The osmolality of the duodeno-jejunal contents of rats was 600-800 mosmol/kg, which suggests that the intestinal osmoreceptors are stimulated after meals. Bilateral subdiaphragmatic vagotomy greatly attenuate … More d the first hour, but not the later phase, of the thermogenesis induced by 3.6% NaCl. Neither atropine pretreatment nor capsaicin desensitization had any effect on the osmotically induced thermogenesis, suggesting the involvement of non-nociceptive vagal afferents. Bilateral splanchnic denervation also had no effect, suggesting a lack of involvement of spinal afferents and sympathetic efferents to the major upper abdominal organs. Adrenal demedullation greatly attenuated the initial phase, but not the later phase, of thermogenesis. Pretreatment with the beta-blocker attenuated the thermogenesis throughout the 3 h observation period. The plasma adrenaline concentration increased significantly 20 min after osmotic stimulation but returned to the basal level after 60 min. The plasma noradrenaline concentration increased 20 min after osmotic stimulation and remained significantly elevated for 120 min. Therefore, adrenaline largely mediated the initial phase of thermogenesis, and noradrenaline was involved in the entire thermogenic response. These results show the critical involvement of the vagal afferents and sympathoadrenal system in the thermogenesis. Less

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Osaka, T., Kobayashi, A., Inoue, S.: "Vago-sympathoadrenal reflex in thermogenesis induced by osmotic stimulation of the intestines in the rat"Journal of Physiology. 540. 665-671 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kobayashi, A., Osaka, T., Inoue, S., Kimura, S.: "Thermogenesis induced by intravenous infusion of hypertonic solutions in the rat"Journal of Physiology. 535. 601-610 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Osaka, T., Kobayashi, A., Inoue, S.: "Thermogenesis induced by osmotic stimulation of the intestines in the rat"Journal of Physiology. 532. 261-269 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Osaka, T., Kobayashi, A. and Inoue, S.: "Thermogenesis induced by osmotic stimulation of the intestines in the rat"Journal of Physiology. 532. 261-269 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kobayashi, A., Osaka. T., Inoue, S., and Kimura, S.: "Thermogenesis induced by intravenous infusion of hypertonic solutions in the rat"Journal of Physiology. 535. 601-610 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Osaka, T., Kobayashi, A. and Inoue, S.: "Vago-sympathoadrenal reflex in thermogenesis induced by osmotic stimulation of the intestines in the rat"Journal of Physiology. 540. 665-671 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Osaka, T., Kobayashi, A.Inoue, S.: "Vago-sympathoadrenal reflex in thermogenesis induced by osmotic stimulation of the intestines in the rat"Journal of Physiology. 540. 665-671 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Osaka, T., Kobayashi, A.Inoue, S.: "Thermogenesis induced by osmotic stimulation of the intestines in the rat"Journal of Physiology. 532. 261-269 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kobayashi, A., Osaka, T., Inoue, S., Kimura, S.: "Thermogenesis induced by intravenous infusion of hypertonic solutions in the rat"Journal of Physiology. 535. 601-610 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Okane, N., Osaka, T., Kobayashi, A., Inoue, S., Kimura, S.: "Effects of the capsaicin analogue resiniferatoxin on thermoregulation in anesthetized rats"Journal of Thermal Biology. 26. 345-349 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Wang, J., Osaka, T., Inoue, S.: "Energy expenditure by intracerebroventricular administration of orexin to anesthetized rats"Neuroscience Letters. 315. 49-52 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Toshimasa Osaka,Akiko Kobayashi and Shuji Inoue: "Thermogenesis induced by osmotic stimulation of the intestines in the rat"Journal of Physiology. 532. 261-269 (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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