• Biomolecules & Therapeutics
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• 제28권4호
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• pp.328-336
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• 2020

Diabetes mellitus affects the colonic motility developing gastrointestinal symptoms, such as constipation. The aim of the study was to examine the role of intracellular signaling pathways contributing to colonic dysmotility in diabetes mellitus. To generate diabetes mellitus, the rats were injected by a single high dose of streptozotocin (65 mg/kg) intraperitoneally. The proximal colons from both normal and diabetic rats were contracted by applying an electrical field stimulation with pulse voltage of 40 V in amplitude and pulse duration of 1 ms at frequencies of 1, 2, 4, and 6 Hz. The muscle strips from both normal rats and rats with diabetes mellitus were pretreated with different antagonists and inhibitors. Rats with diabetes mellitus had lower motility than the control group. There were significant differences in the percentage of inhibition of contraction between normal rats and rats with diabetes mellitus after the incubation of tetrodotoxin (neuronal blocker), atropine (muscarinic receptor antagonist), prazosin (α₁ adrenergic receptor antagonist), DPCPX (adenosine A1 receptor antagonist), verapamil (L-type Ca²⁺ channel blocker), U73122 (PLC inhibitor), ML-9 (MLCK inhibitor), udenafil (PDE₅ inhibitor), and methylene blue (guanylate cyclase inhibitor). The protein expression of p-MLC and PDE₅ were decreased in the diabetic group compared to the normal group. These results showed that the reduced colonic contractility resulted from the impaired neuronal conduction and decreased muscarinic receptor sensitivity, which resulted in decreased phosphorylation of MLC via MLCK, and cGMP activity through PDE₅.

• 대한수의학회지
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• 제44권2호
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• pp.171-177
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• 2004

The regional distributions and frequencies of argentaffin endocrine cells in gastrointestinal (GI) tract of osteoporotic Sprague-Dawley rat induced by ovariectomy were studied by Masson-Hamperl silver stain. The experimental animals were divided into two groups, one is non-ovariectomized group (Sham) and the other is ovariectomized group (OVX). Samples were collected from each part of GI tract (fundus, pylorus, duodenum, jejunum, ileum, cecum, colon and rectum) at 10th week after ovariectomy or sham operation. Argentaffin cells were detected throughout the entire GI tract with various frequencies regardless of ovariectomy except for the rectum of OVX in which no cells were detected. Most of these argentaffin cells in the mucosa of GI tract were generally spherical or spindle in shape (open type cell) while cells showing round in shape (close type cell) were rarely found in gland regions. Significant decrease of argentaffin cells was detected in OVX compared to that of Sham except for the fundus and jejunum. However, in the fundus and jejunum, argentaffin cells in OVX showed similar frequency compared to that of Sham. In conclusion, the endocrine cells are the anatomical units responsible for the production of gut hormones that regulate gut motility and digestion including absorption, and a change in their density would reflect the change in the capacity of producing these hormones and regulating gut motility and digestion. Ovariectomy induced severe quantitative changes of GI argentaffin endocrine cell density, and the abnormality in density of GI endocrine cells may contribute to the development of gastrointestinal symptoms in osteoporosis such as impairments of calcium and some lipids, frequently encountered in patients with postmenopausal osteoporosis.

• Food Science and Biotechnology
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• 제15권1호
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• pp.19-23
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• 2006

Effects of cheonggukjang on immunohistochemical reactions in gastrointestinal (GI) tract of rats were investigated. $CD4^+/CD8^+$ immunoreactive cells of cheonggukjang-fed diet groups were more strongly stained in lamina propria of mucosa and submucosa than those of basal diet group. Universal nitric oxide synthase immunoreactive density in colon was mildly stained in surface epithelium and mucous secretory gland, and strongly stained in submucosa and myenteric plexus in muscle layers of all cheonggukjang-fed diet groups. Protein kinase C-${\alpha}$ immunoreactive cells in colons of 15 and 25% cheonggukjang-fed diet groups were more strongly stained in mucosa, submucosa, and muscle layers than those of basal diet group. These results indicate mucosal immune activity, gastrointestinal motility, blood circulation, and physiological activities of enteroendocrine cells in GI tract could be increased with cheonggukjang intake.

• 동의생리병리학회지
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• 제24권6호
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• pp.996-1003
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• 2010

This study was performed to investigate the effect of promoting gastrointestinal function and inhibiting of decreasing body temperature of ginger extract(Zingiber officinale) in rats. In order to elucidate the gastrointestinal function and inhibiting effect of body temperature of native ginger and improved ginger, water extracts of ginger were orally administrated into rats. The results are as follows: The gastrointestinal transit time was significantly decreased in native ginger(7.66hrs) and improved ginger(7.72hrs) extract administrated groups compare to control group(8.44hrs). The mean red faecal weight was increased in native ginger(30.6%) and improved ginger(31.1%) extract administrated groups compare to control group(24.9%) for 24hrs. Inhibiting effect of decreasing body temperature induced by serotonin was increased in native ginger($1.116^{\circ}C$) and improved ginger($1.416^{\circ}C$) extract administrated groups compare to positive control group($0.384^{\circ}C$) during 40 minutes. Gastrin and CGRP immunoreactive density was more strongly expressed in native ginger and improved ginger extract administrated groups compare to control group. Serotonin immunoreactive density was more weakly expressed in native ginger and improved ginger extract administrated groups compare to control group. These results suggest that ginger extracts may enhance physiological activity such as gastrointestinal motility, protection of mucosa and gastric acid secretion in gastrointestinal tracts, and inhibits decreasing body temperature

• 대한약침학회지
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• 제12권4호
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• pp.77-88
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• 2009

Objectives : The purpose of this study was to compare the effect of acpuncture and electro-acupuncture of low(EA(L)) and high(EA(H)) frequency at Haegye(ST41) on intestinal hypomotility induced with loperamide in rats. Methods : We made suppressed state of intestinal motility with loperamide in rats and carried out needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture at ST41 in rats devided into pre-treatment group and post-treatment group. We fed charcoal to them after the treatment and measured the travel rate of charcoal in the gastrointestinal track to analyze which treatment is more effective in state of intestinal hypomotility. Results : None of acupuncture, EA(L) and EA(H) at ST41 had significant influences on intestinal motility of rat in normal state. Needle retention at ST41 did not significantly increase intestinal motility suppressed with loperamide in rats. Pre-treatment of EA(L) and EA(H) at ST41 significantly increased intestinal motility suppressed with loperamide in rats. Post-treatment of EA(L) and EA(H) at ST41 did not have significant influences on intestinal motility of rat in normal state. Conclusions : These results suggest that treatment of EA(L) and EA(H) at ST41 may be effective on gastric disorders such as intestinal hypomotility and its effect had more prevention than cure. Further study is necessary to know more effects of ST41 and electro-acupuncture of low and high frequency.

• Advances in Traditional Medicine
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• 제6권3호
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• pp.208-214
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• 2006

In this study the Ayurvedic formulation Dasamularista was studied for its preliminary pharmacological properties using laboratory mice. Dasamularista showed a decrease in food intake and stool formation, while the water content of stool and water intake was higher and the volume of the urine was less. Dasamularista in a slight extent reduced the intestinal motility. This constipating effect was further supported by the significant anti-diarrhoeal property of the formulation in castor oil induced dairrhoea. The tested formulation markedly increased the latent period of diarrhoea and reduced the purging index value. Dasamularista did not alter the acetic acid induced abdominal writhing. Significant reduction on the onset of sleeping time and increased duration of sleep was observed in pentobarbital induced sleeping time test.

• Advances in Traditional Medicine
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• 제8권2호
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• pp.130-134
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• 2008

Diarrhoea is a major health care problem in developing countries. Elettaria cardamomum Maton fruits, commonly known as cardamom are widely used for flavoring purposes in food. In this study we evaluated the antidiarrhoeal activity of hot water extract of cardamom against experimental diarrhoeal models on mice. Cardamom extract showed significant antidiarrhoeal activity against castor oil and magnesium sulphate induced models. Whereas, the gastrointestinal motility was slightly increased.

• 한국건강관리협회지
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• 제3권1호
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• pp.46-54
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• 2005

The functional dyspepsia is a complex disease reaction that ocurs due to the presence of various factors and its pathophysiology has not been clearly verified until now. This disease is diagnosed after the organic diseases are ruled out. Therefore, the main treatments are limited down to compensating for revealed symptoms through exercising the supportive care. The international prevalence of the functional dyspepsia under the Rome I criterior is approximately 25%. For the cases of Koreans, there are very omnifarious symptoms in gastrointestinal disorders and the medical vocabularies which describe the diagnostic standard are not closely associated with the daily vocabularies, thus there would be a lot of restrictions to directly apply the Rome II criterior. However, the Korean Society of Gastrointestinal motility had decided to promote the use of the international standardized Rome II criterior in order for Korea to be comparable to the clinical studies from the other nations. There should be more extensive studies to differentiate the definitions of symptom descriptions from Korea to foreign countries. The extended researches concerning the pathophysiology are highly recommended which in return, would help enabling the reliable treatment techniques for this disease.

• 생명과학회지
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• 제24권3호
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• pp.260-265
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• 2014

귤나무(Citrus unshiu)의 과피를 말린 한약재인 진피(Aurantii Nobilis Pericarpium; ANP)는 오래 전부터 대한민국을 비롯한 동아시아에서 위장관 운동 관련 질환의 치료에 전통적으로 쓰여 왔다. 본 연구에서는 진피 주정 추출물(ANP-E)을 제조하여 실험하였는데, 우선 ANP-E는 5 g/kg의 고용량을 mouse에 경구 투여하였을 때에도 급성독성을 나타내지 않았다. ANP-E가 위장관 운동 기능에 미치는 영향을 파악하고 이를 cisapride의 효과와 비교하기 위하여, mouse를 대상으로 위장관 이송률을 측정하는 실험을 수행하였다. Cisapride는 20세기 말까지 다양한 위장관 운동 저해 상황에서 임상적으로 광범위하게 적용되었던 최고의 위장관 운동 촉진제였으나, 치명적인 부작용으로 인하여 2000년 이후 시장에서 철수된 약물이다. 실험 결과, ANP-E는 정상 및 위장관 운동 저해 상황에서 모두 용량 의존적으로 위장관 운동을 촉진시키는 것으로 나타났다. ANP-E의 위장관 운동 촉진 효과를 cisapride와 비교해 보면, 정상 mouse에서는 cisapride와 거의 대등한 위장관 이송률 수치를 나타내었으며, 특히 위장관 운동 저해 상황에서는 cisapride보다 약효 및 안전성 측면에서 모두 비교 우위를 점하는 강력한 위장관 운동 기능개선 효과를 보였다. 이상과 같은 결과들은, ANP-E가 인간의 위장관 운동 기능 저해 상황을 개선할 수 있는 새롭고 강력한 신약 후보 물질이자, 아직 시장에 출현하지 않고 있는 cisapride의 대체 의약품으로서 개발 가능함을 시사하고 있다.

• Food Science and Biotechnology
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• 제14권6호
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• pp.813-817
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• 2005

We investigated the effect of a viscous substance from chongkukjang (chongkukjang mucilage) on immunohistochemical reactions in rat gastrointestinal (GI) tracts, Rats fed a steady diet of chongkukjang mucilage showed an increase in the immunoreactive densities of gastrin and serotonin in the pyloric region of their stomachs and duodenal villi, The number of gastrin and serotonin immunoreactive cells was significantly higher in the experimental group than in the control group. Feeding on dietary chongkukjang mucilage increased the immunohistochemical densities of $CD4^+$ and $CD8^+$ lymphocytes in the mucosa and submucosa of the rats' gastroduodenal region. The universal nitric oxide synthase (uNOS)-immunoreactive neurons and nerve fibers were strongly stained in the vascular walls of the submucosa and myenteric plexus in rats fed the test diet. The results indicate that the intake of chongkukjang mucilage could increase mucosal immune activity, gastrointestinal motility, and blood circulation in the GI tract.