• 한국축산식품학회:학술대회논문집
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• 한국축산식품학회 1998년도 추계학술발표회
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• pp.41-57
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• 1998

Five hundreds of bifidobacteria were isolated from an healthy Korean and the inhibitory effects of these isolated bacteria on harmful enzymes of human intestinal microflora were examined by cocultivation of the isolated bifidobacteria with E. coli HGU-3 or total human intestinal microflora. In comparison with the results of E. coli or intestinal microflora cultivation, Bifidobacterium breave K-110, B. breve K-111 and B. infantis K-525 effectively inhibited harmful enzymes (${\beta}-glucuronidase$ and tryptophanase) of E. coli and lowered the pH of the culture media. Also they inhibited the harmful enzymes (${\beta}-glucosidase$, ${\beta}-glucuronidase$, tryptophanase and urease) and ammonia production of intestinal microflora, and lowered pH of the culture media by increasing the number of bifidobateria on intestinal microflora. The inhibitory effect of bifidobacteria on Growth of Helicobacter pylori and Rotavirus infection were exammed. Bifidobacterium K-110 and K-111 inhibited effectively them. When these isolated bifidobacteria were administered to mice, the activities of fecal harmful enzymes were inhibited and the AC and ACF formation were suppressed. Among tested bifidobacteria, B. breve K-110 had high inhibitory effect of fecal harmful enzymes and ACF formation.

• Journal of Gastric Cancer
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• 제13권4호
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• pp.232-241
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• 2013

Purpose: Gastrokine 1 plays an important role in gastric mucosal defense. Additionally, the Gastrokine 1-miR-185-DNMT1 axis has been shown to suppress gastric carcinogenesis through regulation of epigenetic alteration. Here, we investigated the effects of Gastrokine 1 on DNA methylation and gastritis. Materials and Methods: Expression of Gastrokine 1, DNMT1, EZH2, and c-Myc proteins, and the presence of Helicobacter pylori CagA protein were determined in 55 non-neoplastic gastric mucosal tissue samples by western blot analysis. The CpG island methylation phenotype was also examined using six markers (p16, hMLH1, CDH1, MINT1, MINT2 and MINT31) by methylation-specific polymerase chain reaction. Histological gastritis was assessed according to the updated Sydney classification system. Results: Reduced Gastrokine 1 expression was found in 20 of the 55 (36.4%) gastric mucosal tissue samples and was closely associated with miR-185 expression. The Gastrokine 1 expression level was inversely correlated with that of DNMT1, EZH2, and c-Myc, and closely associated with the degree of gastritis. The H. pylori CagA protein was detected in 26 of the 55 (47.3%) gastric mucosal tissues and was positively associated with the expression of DNMT1, EZH2, and c-Myc. In addition, 30 (54.5%) and 23 (41.9%) of the gastric mucosal tissues could be classified as CpG island methylation phenotype-low and CpG island methylation phenotype-high, respectively. Reduced expression of Gastrokine 1 and miR-185, and increased expression of DNMT1, EZH2, and c-Myc were detected in the CpG island methylation phenotype-high gastric mucosa. Conclusions: Gastrokine 1 has a crucial role in gastric inflammation and DNA methylation in gastric mucosa.

• 한국자원식물학회지
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• 제34권5호
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• pp.420-432
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• 2021

순창군에서 재배한 초석잠을 건강식품을 개발하기 위한 기초자료를 확보하고자 초석잠 물 추출물과 60% 에탄올 추출물에 대한 항산화, 항균, 항염, 소화효소 활성을 측정하였다. DPPH 라디칼 소거능(IC₅₀)은 SAW는 5.26 ± 0.05 mg/mL, SAE는 4.34 ± 0.04 mg/mL로 나타났으며, ABTS 라디칼 소거능(IC₅₀)은 SAW는 6.44 ± 0.06 mg/mL, SAE는 5.05 ± 0.06 mg/mL로 나타났다. 총 폴리페놀 함량은 SAW는 106.25 ± 0.94 mgGAE/g, SAE는 124.61 ± 1.11 mgGAE/g, 총플라보노이드 함량은 SAW는 24.4 ± 0.24 mgQE/g, SAE는 45.2 ± 3.52 mgQE/g으로 분석되었다. CAA assay를 활용한 HepG2 세포내 항산화 활성은 400 ㎍/mL의 농도에서 SAW는 53.2 ± 1.8%, SAE는 54.1 ± 0.4%로 감소되었다. SAW의 MIC는 L. monocytogenes은 100 mg/mL, S. typhimurium와 H. pylori은 125 mg/mL로 측정되었으며, MBC는 L. monocytogenes와 S. typhimurium은 325 mg/mL, H. pylori은 400 mg/mL로 측정되었다. RAW 264.7 세포에서 각 추출물 모두100 ㎍/mL 이하의 농도에서 독성이 나타나지 않았으며, 추출물 100 ㎍/mL 농도에서 SAW는 44.3 ± 1.4%, SAE는 45.1 ± 1.0%로 NO 생성을 저하시켰다. 염증성 사이토카인인 TNF-𝛼, IL-1𝛽 및 IL-6 생성을 농도 의존적으로 억제시켰다. Caco-2 세포에서 SAW와 SAE 추출물 모두 독성이 나타나지 않았으며, 농도 의존적으로 NO 생성을 억제시켰다. 𝛼-Amylase와 protease 효소활성은 초석잠 추출물의 처리 농도가 증가함에 따라 효소의 활성도 증가하였다.

• 한국자원식물학회지
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• 제35권5호
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• pp.574-585
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• 2022

순창군에서 생산된 두릅을 40% EtOH을 이용하여 추출한 후 chlorogenic acid 함량, 항산화, 항균, 항염 및 소화효소 활성을 측정하였다. HPLC를 이용하여 chlorogenic acid 함량을 측정한 결과 7.06±0.01 mg/g 함유되어 있었다. DPPH 라디칼 소거활성(SC₅₀)은 4.79±0.05 mg/mL, ABTS 라디칼 소거활성(SC₅₀)은 5.79±0.05 mg/mL, 총 폴리페놀 함량은 170.0±1.8 mgGAE/g, 총 플라보노이드 함량은 105.5±4.1 mgQE/g으로 분석되었다. RAW 264.7 세포, Caco-2 세포에서 세포독성이 나타나지 않았으며, 농도 의존적으로 NO 생성이 억제되었다. RAW 264.7 세포에서 염증성 cytokine인 TNF-α생성은 8.9±0.1 ng/mL, IL-6 생성은 15.2±0.8 ng/mL, IL-1β생성은 30.9±0.9 pg/mL으로 억제되었으며, AEE의 처리 농도가 증가함에 따라 TNF-α, IL-1β, IL-6 생성이 농도 의존적으로 억제되었다. S. typhimurium, L. monocytogenes, H. pylori에 대한 항균활성이 우수하게 나타났으며, 두릅을 EtOH 추출물의 처리농도가 증가함에 따라 효소 활성인 α-amylase와 protease 효소활성도 증가하였다. 순창군에서 생산된 두릅은 chlorogenic acid를 다량 함유하고 있으며, 항산화, 항염, 항균, 소화효소 활성이 우수하게 나타나 향후 건강기능성 소재로 개발할 수 있을 것으로 판단된다.

• Applied Biological Chemistry
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• 제50권3호
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• pp.198-203
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• 2007

오미자 추출물로부터 항산화효과 및 ${\alpha}-amylase$, ${\alpha}-glucosidase$ 저해활성 및 Helicobacter pylori균에 대한 항균효과를 알아보았다. 페놀함량을 측정한 결과 물 추출물에서는 4.35 mg/g로 나타났으며, ethanol 추출물에서는 60% ethanol 추출물이 6.35 mg/g로 가장 높은 페놀함량을 나타내었다. 항산화효과와 ${\alpha}-amylase$, ${\alpha}-glucosidase$ 저해활성은 추출물의 농도를 200 ${\mu}g/ml$로 조절하여 실험하였다. DPPH에 대한 전자공여능은 물 추출물에서는 97.5%, 60% ethanol 추출물에서는 96.2%로 나타났으며, ABTS radical decolorlization을 측정한 결과 물 추출물에서는 96.8%, 60% ethanol 추출물에서는 97.0%로 나타났다. Antioxidant protection factor에서는 물 추출물이 1.77 PF, 60% ethanol 추출물은 2.08 PF로 나타났으며, PF와 같이 지용성 물질의 항산화력을 나타내는 TBARS값은 control값이 $1.17{\times}10^2$ ${\mu}M$으로 나타났고, 물 추출물에서는 $1.03{\times}10^2$ ${\mu}M$, 60% ethanol 추출물에서는 $0.54{\times}10^2$ ${\mu}M$의 TBARS값을 나타내어 지질과산화 억제 효과는 물 추출물보다 60% ethanol 추출물이 더 높은 것으로 나타났다. ${\alpha}-Amylase$ 저해활성을 측정한 결과, 물과 60% ethanol 추출물 모두에서 100%의 높은 저해활성을 나타내었으며, ${\alpha}-glucosidase$ 저해활성효과는 물 추출물에서는 97.4%, 60% ethanol 추출물에서는 84.5%로 물 추출물에서 더 높게 나타났다. H. pylori균에 대한 항균활성은 200 ${\mu}g/ml$의 농도의 60% ethanol 추출물에서 $23{\pm}1.6$ mm의 저해환을 나타내었다.

• Journal of Pharmaceutical Investigation
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• 제39권1호
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• pp.7-12
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• 2009

A novel polymeric tablet of Tinidazole was formulated to treat Helicobacter pylori and Giardia lambria more efficiently, It was possible to reduce hepatotoxicity by controlling the release of Tinidazole after peroral administration. A gastric retentive formulation made of naturally occurring carbohydrate polymers and containing Tinidazole was tested in vitro for swelling and dissolution characteristics. Tinidazole tablets containing various concentration of either PEO or HPMC were prepared by the wet granulation method. In vitro release of Tinidazole at pH 1.2 and pH 6.8 buffer solutions was observed at $37^{\circ}C$ by using a KP dissolution method and an UV (313 nm) spectrophotometer. Compared to a commercial Tinidazole tablet, in vitro release of Tinidazole at both pH 1.2 and pH 6.8 buffer solutions significantly decreased as the concentration of PEO or HPMC in the tablet increased up. And the gastric retentive formulation hydrated and swelled back to about 50% of its original size in 30 min. Thus, it was possible to control the release of Tinidazole by changing the content of PEO or HPMC in the tablet, thereby manipulating the release rate and the retention of Tinidazole.

• 한국임상약학회지
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• 제7권1호
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• pp.22-32
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• 1997

The gastrointestinal disorders (GI disorders) is one of the most common diseases in Korea. The community pharmacists are often faced with the complaints of symptoms due to the GI disorders. However the drugs used to treat the GI disorders are frequently abused by the patients themselves because these drugs are easily available and have high placebo effects. Therefore, we have reviewed the digestive diseases statistics of 1996 to find out the frequencies of the GI disorders in the outpatients of Samsung Medical Center. Using these statistic data, we figured out the frequently diagnosed GI disorders and analysed commonly used prescriptions from February 1st to 28th of 1997. In addition, we also evaluated the commonly used drugs in these prescriptions. About twenty thousands of patients visited the hopital because of their GI symptoms in 1996. It was found that dyspepsia, viral hepatitis, and gastric and duodenal ulcer disease are frequently diagnosed in these patients. In a point of view on other GI disorders, gastritis and duodenitis, irritable bowel syndrome, gastroesophageal reflux disease, constipation and diarrhea were commonly detected. And a number of drugs were prescribed to treat the GI disorders, which included the prokinetics, Histamine-2 receptor antagonists, proton pump inhibitor, antacids, tranquillizers, antidepressants, antispasmodics, laxatives and so on. Interestingly, there were many prescriptions composing of the antibiotic regimens to eradicate H. pylori which has been proven to cause peptic ulcers.

• Bulletin of the Korean Chemical Society
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• 제29권2호
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• pp.347-351
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• 2008

Acetyl-CoA carboxylase (ACC) is an excellent candidate for antibiotics drug target, which mediates malonyl-CoA synthesis from acetyl-CoA through acetylation process. It is also involved in the committed step of fatty acid synthesis which is essential for living organisms. We have determined the three dimensional structure of C terminal domain of HP0371, biotin-carboxyl carrier protein of H. pyroli, in solution state using heteronuclear multi-dimensional NMR spectroscopy. The structure of HP0371 shows a flatten b-sheet fold which is similar with that of E. coli. However, the sequence and structure of protruding thumb are different with that of E. coli and the thumb shows different basis of structural rigidity based on backbone dynamics data.

• 생명과학회지
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• 제30권8호
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• pp.695-700
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• 2020

본 연구에서는 물푸레나무 껍질인 진피로부터 Syringin을 효과적으로 분리, 정제하고 항산화 및 항균 활성을 평가하여 기능성 소재로써의 가능성을 탐구하고자 하였다. Syringin은 DPPH radical 소거활성 평가에서 50 ㎍/ml의 적은 농도로도 BHT보다 높은 활성을 나타내었으며 ABTS radical 소거활성 평가에서는 모든 농도에서 BHT의 활성과 비슷한 정도의 활성을 나타냈다. PF 측정에서는 Syringin의 농도가 증가함에 따라 활성이 다소 높아지는 듯했으나 증가폭이 크지 않았고 모든 농도에서 1.2 PF 이상의 활성이 나타나 항산화력이 있다고 판단하였다. TBARs 활성 측정에서는 모든 농도에서 BHT의 활성보다 낮지만 농도 의존적으로 항산화력이 증가하는 것을 확인할 수 있었다. 그람양성, 그람음성, 진균에 대한 생육 억제 활성 평가에서는 L. monocytogenes KCTC 13064, S. aureus KCTC 1916, E. coli KCTC 2571, H. pylori HPKCTC B0150의 네 균주에 대한 생육억제환의 크기가 Syringin의 농도에 의존적으로 증가하였고 C. albicans ATCC 10231에 대해서는 생육억제환이 관찰되지 않았다. 위의 결과를 종합한 결과 Syringin의 수용성 물질의 항산화 활성은 지용성 물질의 항산화 활성보다 우수하고 진균을 제외한 그람양성 및 그람음성 균주에 대한 성장을 억제함으로써 항균 활성을 나타낸다고 판단하였다. 본 연구를 토대로 Syringin의 항산화 및 항세균 기작에 대한 연구와 다른 생리활성 작용, 인체 적용성에 대한 연구를 추가로 진행한다면 천연 유래의 안전한 기능성 소재로 활용 가능할 것으로 사료된다.

• Journal of Preventive Medicine and Public Health
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• 제39권6호
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• pp.493-498
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• 2006

Objectives : Diabetes has been reported as a risk factor for several cancers. However, the association between diabetes and gastric cancer has been inconsistent. The aim of this study was to evaluate the association between the fasting serum glucose level and gastric cancer risk in Korea. Methods : Among the members of the Korean Multi-Center Cancer Cohort (KMCC) from 1993 to 2004, a total of 100 incident gastric cancer cases were ascertained until December 31, 2002 and 400 controls were matched according to age, sex, and year and area of enrollment. Of the eligible subjects, those without fasting serum glucose level information were excluded, with a total of 64 cases and 236 controls finally selected. On enrollment, all subjects completed a baseline demographic and lifestyle characteristics questionnaire, and had their fasting serum glucose level measured. The Helicobacter pylori infection status was determined by an immunoblot assay using long-term stored serum. The odds ratios (ORs) were estimated using conditional and unconditional logistic regression models adjusted for the H. pylori infection status, smoking, drinking, education, follow-up period and matching variables. Results : The ORs for risk of gastric cancer according to the serum glucose level were 1.33 [95% CI=0.50-3.53] and 1.66 [95% CI=0.55-5.02] for the categories of 100-125 and 126 mg/dL or greater, respectively, compared to the category of less than 100 mg/dL. No increased risk of gastric cancer according to the serum glucose level was found (p-trend=0.337). Conclusions : This study provides no evidence for an association of the serum glucose level with gastric cancer.