• International Journal of Industrial Entomology and Biomaterials
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• v.35 no.1
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• pp.14-21
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• 2017

Gastric ulcer is a clinical symptom characterized by inflammation of the gastric mucosa. Stress and alcohol consumption have been identified as the major cause of gastric ulcer. However, the effects of silkworms on ethanol-induced gastric ulcer have not been studied yet. The mature silkworms that are difficult to eat have become easier to ingest due to recent technological development to make steaming and freeze-drying mature silkworm larval powder (SMSP). In this study, we investigated whether three silkworm varieties, Baekokjam, Golden-silk and Yeonnokjam could alleviate ethanol-induced gastric mucosal damage in vivo. Sprague-Dawley rats pretreated with 3 SMSPs (0.1 or 1 g/kg BW) or normal diet (AIN-76A) were exposed to absolute ethanol (3 g/kg BW, 3 h) by oral gavage. Morphological examination included ulcer index as a measurement of hemorrhages and hematoxylin and eosin staining was performed to analyze the severity of gastric ulcer. Results of macroscopic examination suggested that all 3 SMSPs pretreatment significantly protected gastric mucosa against ethanol-induced damage. Microscopic observations demonstrated significant mucosal erosion and inflammation in ethanol-treated rats, which was abrogated in rats pretreated with 3 SMSPs. In addition, pretreatment with all 3 SMSPs showed significant decreases the expression of pro-inflammatory mediators, IL-6 and cyclooxygenase-2. Among SMSP from 3 varieties of silkworm, preadministration of 1 g/kg Baekokjam SMSP showed the most effective protective effect against ethanol-induced gastric ulcer. These results suggest that Baekokjam SMSP can be a potential gastroprotective agent against ethanol-induced gastric ulcer.

• Biomolecules & Therapeutics
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• v.7 no.4
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• pp.362-370
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• 1999

Propolis, a natural resinous compound collected from honey bees, contains many biochemical constituents(wax, flavonoids, phenolic compounds, etc.) and has been used in traditional medicines as early as 300 B.C. It was been demonstrated that ethanol, acetylsalicylic acid, ischemia reperfusion, non-steroidal antiin-flammatory drugs and stress induce gastric lesions by promoting the generation of reactive oxygen metabolites. Therefore, some drugs that are capable of scavenging or inhibiting the generation of reactive oxygen radicals might be expected to prevent the gastric mucosal injury. The aim of this study was 1) to examine the antiulcer effect of propolis, 2) to investigate the mechanism of action by determining gastric acid secretion, lipid per-oxidation, mucus content and proton pump ($H^+$/$K^+$-ATPase) activity on gastric mucus in varios experimental models, and finally, 3) to isolate and identify the pure compounds that exert antiulcer activity. Step 2-1 and 2-3 sub-sub fraction shoed a significant reduction of severity of gastirc damage at the dose of 25 mg/kg in various experimental models. We isolated 4 sub-sub-sub fractions by flash column chromatography of Step 2-1 sub-sub fraction and one sub-sub-sub fraction by recrystalization of Step 2-3 sub-sub fraction. The protective effects of propolis sub-sub-sub fraction manifested sifnificant effects in HCl-ethanol induced gastric erosion model and aspirin induced gastric ulcer model. These results showed that the gastric mucosal protective effect of propolis might result from the increase of mucus secretion, free radical scavenging effect as well as the reduction of acid secretion in accordance with the reduction of $H^+$/$K^+$-ATPase activitv. Three compounds were isolated and identified from sub-sub fraction of propolis which showed antiulcer effects. Subsequently, these compounds were identified as a flavonoid, namely, 2-acetoxy-5,7,-dihydroxy-flavanone, galangin and chrysin.

• The Journal of Korean Medicine
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• v.28 no.2 s.70
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• pp.166-184
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• 2007

Objectives : This study was conducted to investigate the effects of Daegeum-eumja, Igwi-tang, and Sihosogan-san on gastric mucosal lesions induced by alcohol, indomethacin, and burn-stress in mice. Methods : Experimental mice were divided into six groups. The normal group (NOR) did not receive any treatment to elicit gastropathy. In the control group (GE), gastropathy was elicited by alcohol, indomethacin, and stress. In the misoprostol group (MS), misoprostol was administered after gastropathy was elicited by alcohol, indomethacin, and stress. In the Daegeum-eumja group (DG), Daegeum-eumja was administered after gastropathy was elicited by alcohol, indomethacin, and stress. In the Igwi-tang group (IW), Igwi-tang was administered after gastropathy was elicited by alcohol, indomethacin, and stress. In the Sihosogan-san group (SH), Sihosogan-san was administered after gastropathy waselicited by alcohol, indomethacin, and stress. The effects on gastric mucosal lesions were evaluated by the morphological change of gastric mucosa, the anti-oxidant effect, HSP 70, $NF-{\kappa}B$ p65, $I{\kappa}B$, COX-1, PNA, BrdU, and iNOS. Results : Hemorrhage erosion, HSP70, and $NF-{\kappa}B$ in the DG, IW and SH groups decreased more than that of the control. The $I{\kappa}B$, COX-1, PNA, BrdU, and iNOS in the DG, IW, and SH groups increased more than that of the control. DG showed the most effect against gastric mucosal lesions induced by alcohol; IW against gastric mucosal lesions induced by indomethacin; and SH against gastric mucosal lesions induced by burn-stress. Conclusions: Daegeum-eumja, Igwi-tang, and Sihosogan-san extracts have excellent effects on gastric mucosal lesions induced by alcohol, indomethacin, and burn-stress, respectively.

• The Journal of Korean Medicine
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• v.24 no.1
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• pp.155-168
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• 2003

This study was carried out to investigate the effect of Keuibi-tang (KBT) on the injury of gastric mucous membrane by stress and ethanol in mice. The normal group was non-inflammation elicited mice. The two control groups were mice with gastro-inflammation elicited by stress and ethanol. The two sample groups were mice administered KBT before gastro-inflammation elicitation. In the common morphology and histochemical change, the two control groups were observed with various injuries such as hemorrhagic erosion and ulcer, while the sample group was the same as the normal group. In the immunohistochemical change, the distributions of PNA and COX-1 treated with KBT noticeably increased over the control group (P<0.05). The distributions of $NF-{\kappa}B$ p50, COX-2 and TUNEL in the group treated with KBT were noticeably lower than in the control group (P<0.05). The distribution of KBT was the same as the normal group. According to the above results, it is supposed that KBT is applicable to gastritis and gastric ulcer due to stress and alcoholic drinks.

• The Journal of Internal Korean Medicine
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• v.31 no.3
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• pp.477-487
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• 2010

Objectives : This study was carried out to investigate the effects of sihogeji-tang on indomethacin-induced gastric mucosal lesions in rats. Methods : Experimental rats were classified into three groups. The normal group had no inflammation elicited. The control group was rats administered water after elicitation of gastro-inflammation. The sample group were administered sihogeji-tang after gastro-inflammation elicitation. Results : In the common morphology and histochemical change, the control group were observed to have various injuries by hemorrhagic erosion, while the sample group had noticeably fewer injuries than the control. In the immunohistochemical change, the distribution of HSP-70, PCNA treated with sihogeji-tang noticeably increased over the control group. The distribution of NF-kB, COX-2 treated with sihogeji-tang noticeably decreased compared to the control group. (p<0.05) Conclusions : Sihogeji-tang had significant effects on indomethacin-induced gastric mucosal lesions in rats.

• The Journal of Internal Korean Medicine
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• v.25 no.3
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• pp.518-528
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• 2004

This study was carried out to investigate the effects of Hyangsapyeongwisan(HP) on gastric mucosal lesions induced by indomethacin in mice. The control group consisted of gastro-inflammation elicited mice. The sample group consisted of mice given HP after onset of gastro-inflammation. In common morphological and histochemical change, various cell abnormalities were observed in the control group, such as mucous surface cell, peanut cell, surface epithelial cell, goblet cell abnormalities, all caused hemorrhagic erosion. The sample group was the same as the control group. In the immunohistochemical change, the distributions of COX-I, BrdU treated with HP were notably higher than those of the control group(p$NF-{\kappa}B$, COX-2, PKC, IL-12B in mice treated with HP were notably lower than those of the control group(p

• The Journal of Korean Medicine
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• v.28 no.2 s.70
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• pp.224-240
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• 2007

Objectives : This study was carried out to investigate the effect of Jiyu-tang on gastric and ileac mucosal ulcer induced by indomethacin in mouse. Methods : The normal group was that no inflammation elicited mouse. Control group is that water administered mouse after gastro-inflammation elicitation. Sample group is that Jiyu-tang administered mouse after gastro-inflammation elicitation. Results : In the common morphology and histochemical change, control group were observed various injury by hemorrhagic erosion, while sample group was noticeably decreased than control group. In the immunohistochemical change, the distributions of COX-1 treated with Jiyu-tang noticeably increased than control group(p<0.05). The distributions of COX-2, MAC 387 and HSP-70, PCNA and TUNEL treated with Jiyu-tang noticeably decreased than control group(p<0.05). Conclusions : According to the above results, it is supposed that Jiyu-tang is applicable to gastric and ileac mucosal ulcer.

• Korean Journal of Veterinary Service
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• v.13 no.2
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• pp.111-129
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• 1990

Based on the gross lesion, a survey of ulcer prevalence was carried out on pigs (3,161 heads) at a slaughterhouse in seoul from April to December in 1989. The pigs stomachs were observed anatomically and classified, according to the presence or absence of foreign bodies. Ulcer prevalence is usually classified according to size of pig farm, ages, and supplied month. The results in the studies were as follows, 1. Fundus followed the highest rate with 28.2%, esophagus with 24.5％ each of cardiac and pyloric part with 7.8% and 4.1％ in cases of gastric mucosa pathological studies examed total 3,161. In the acute ulcer prevalence, fundus follwed with 5.4%, esophagus with 2.6%, each of cardiac and pyloric part with 0.8% and 0.3%. When prevalent frequencies of fundus are compared with cardiac and pyloric part, they have meaning.(P <0.05). 2. In the survey pig of total 3,161, pathological changes of epithelium tissue foliowed 44.0%, erosion(11.5%), chronic ulcer(14.8%), acute ulcer(1.6%), scar formation (1.7%) and perforation (0.9%). 3. In general monthly prevalence rates of gastric lesion are higher in spring and fall than in summer. 4. In the size of pig farms, ulcer showed higher rate at professional farms than raising on the side. 5. When there are more fluid condition in stomach and they are old, the ulcer appeared for more. 6. Foreign bodies in stomach were sand, hairballs, and intestinal worms were detected (1%).

• The Journal of Korean Medicine
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• v.32 no.2
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• pp.102-117
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• 2011

Objectives: This study was performed to investigate the protective and treating efficacy of Pyeongwi-san, Ijin-tang, and Pyeongjin-tang extracts to the mice with gastric mucosal lesions induced from indomethacin. Methods: In order to verify protective and treating efficacy of Pyeongwi-san, Ijin-tang, and Pyeongjin-tang extracts to the mice with gastric mucosal lesions induced from indomethacin, I administered the extracts of these prescriptions to three group, and induced gastric mucosal lesion by indomethacin, and then I observed the gastric mucosal morphology of stomach, changes from stress resulting from HSP70, changes of gastro-protection (mucous barrier, COX-1). After I observed the anti-oxidant effect, and anti-inflammation effect (IKK mRNA, iNOS mRNA, COX-2 mRNA) in vitro, I induced gastric mucosal lesion by indomethacin, and administered the extracts of each prescriptions to three group, and then I observed the gastric mucosal morphology, anti-inflammation effect to mucosa (NF-${\kappa}$B, iNOS, COX-2) in vivo. Results & Conclusions: 1. Hemorrhagic erosion and damaged mucus secreting cell, positive responses to HSP70 were decreased in all the before-gastric-mucosal-lesion-induced groups, compared to non-extract administered group. The effects were good in the order of Pyeongwi-san extracts administered group, Pyeongjin-tang extracts administered group and Ijin-tang extracts administered group. 2. In all the before-gastric-mucosal-lesion-induced groups, gastro- protection functions (mucous barrier, COX-1) were significant. The effects were good in the order of Pyeongwi-san extracts administered group, Pyeongjin-tang extracts administered group and Ijin-tang extracts administered group. 3. Anti-oxidant effect was significant in Pyeongwi-san extracts, Ijin-tang extracts and Pyeongjin-tang extracts. The effects were good in the order of Pyeongjin-tang extracts, Pyeongwi-san extracts and Ijin-tang extracts. 4. The anti-inflammation effects in vitro were good in Pyeongwi-san extracts, Ijin-tang extracts and Pyeongjin-tang extracts. Especially Pyeongjin-tang extracts showed the most prominent results. Damaged mucus secreting cells and the positive reactions of NF-${\kappa}$B, iNOS, COX-2 in vivo were decreased in after-gastric-mucosal-lesion-induced groups compared to non-extract administered group. The effects were good in the order of Pyeongjin-tang extracts administered group, Pyeongwi-san extracts administered group and Ijin-tang extracts administered group. These results show that Pyeongwi-san, Ijin-tang and Pyeongjin-tang are effective on both in protecting and treating the gastric mucosal membrane. Pyeongwi-san is more effective than other prescriptions, in protecting gastric mucosal membrane, and Pyeongjin-tang is more effective in treating gastric mucosal lesion.

• The Journal of Internal Korean Medicine
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• v.31 no.3
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• pp.401-414
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• 2010

Objectives : This study was carried out to investigate the effects of Soche-hwan extract on indomethacin-induced gastric mucosal lesions of mice. Methods : Experimental mice were divided randomly into four groups. The normal group, the gastropathy group of gastro-inflammation elicited mice, the misoprostol group of mice administered misoprostol after gastro-inflammation elicitation and the Soche-hwan group of mice administered Soche-hwan after gastro-inflammation elicitation. Results : The hemorrhagic erosion of gastric mucosa, the damage of arrangement of mucous secreted cells and HSP70 increased in the gastro-inflammation elicited group, but decreased significantly in the misoprostol and Soche-hwan extract administered groups. Cell proliferation of gastric mucosa decreased in the gastro-inflammation elicited group, but increased significantly in the misoprostol and Soche-hwan extract administered groups. The distribution of mucosal neck cells and mucosal surface cells and PNA positive reactions of surface mucus cells decreased in the gastro-inflammation elicited group, but increased significantly in the misoprostol and Soche-hwan extract administered groups. COX-1 positive cells decreased in the gastro-inflammation elicited group, but increased significantly in the misoprostol and Soche-hwan extract administered groups. iNOS mRNA and COX-2 mRNA increased in the gastro-inflammation elicited group, but decreased significantly in the Soche-hwan extract administered group. NF-kB p65, iNOS and COX-2 increased in the gastro-inflammation elicited group, but decreased significantly in the misoprostol and Soche-hwan extract administered groups. Conclusion : Soche-hwan extract had excellent effects on indomethacin-induced gastric mucosal lesions in mice.