On earth, there are about 5,400 kinds of mammals, of which about 1,000 kinds are herbivores. Among herbivores, about 250 kinds are known to be ruminants. As for cattle and sheep, which are ruminants, fermentation takes places mainly in their rumen; in contrast, for pigs and men, which are non-ruminants, fermentation takes place mainly in their caecum, colon, and rectum. As for the kind and dominance of rumen microorganisms, Bacteroidetes account for 51% and Firmicutes for 43%. As for the dominance of the large intestine microorganisms in men, Firmicutes account for 65% and Bacteroidetes for 25%. Cell wall components are decomposed by microorganisms, and short chain fatty acids (SCFAs) are generated through fermentation; the ratio of acetate, propionate, and butyrate generate is 60:25:15. Butyrate absorbed through the primary butyrate transporter MCT1 (mono carboxylate transports-1) in the intestines activates such SCFA receptors as GPR43 and GPR41. Butyrate has a strong anti-tumorigenic function. Butyrate is characterized by the fact that it has an effect on many cancer cells, contributes to the coordination of functions in the cells, and induces cancer apoptosis. Butyrate activates caspase but inhibits the activity of HDAC (histone deacetylase), so as to induce apoptosis. In addition, it increases p53 expression, so as to induce cell cycle arrest and apoptosis. Anti-inflammation actions of SCFA include the reduction of IL-8 expression in intestinal epithelial cells, the inhibition of NO synthesis, and the restraint of the activity of NF-${\kappa}B$ (nuclear factor ${\kappa}B$), so as to suppress the occurrence of cancers caused by inflammation. Butyrate plays an important role in maintaining physiological functions of intestinal mucous membranes and is used as a cure for inflammatory bowel disease (IBD).
Kim Kwang Il;Park Sung-Hye;Han Sun-Ae;Chae Yang-Seok;Kim Insun
Journal of Gastric Cancer
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v.1
no.4
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pp.202-209
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2001
Purpose: When cancer cels invade the stroma, they should be dissociated from the adjacent cells at first. E-cadherin and $\beta-catenin$ constitute an important protein complex associated with cellular adhesion, development, and differentiation, especially in epithelial cells. The role of E-cadherin and $\beta-catenin$ in gastric carcinogenesis were studied. Materials and Methods: The expression of E-cadherin and $\beta-catenin$ in gastric adenocarcinomas by using immunohistochemical staining and the mutation by using polymerase chain reaction- single stranded conformation polymorphism (PCR-SSCP) and sequencing were performed in 40 adenocarcinomas and 5 dysplasia of stomach. Thirteen cases, which had lymph node metastasis, were also included for immunohistochemical staining. Results: Inappropriate cytoplasmic and/or nuclear expression of a E-cadherin-$\beta-catenin$ complex was more frequent in poorly differentiated, diffuse type signet ring cell carcinomas than in well-differentiated, intestinal type adenocarcinomas (P<0.05). However, the expression was not related with clinical stage or lymph node metastasis. Mutation of E-cadherin was detected in 4 cases by using PCR-SSCP, whereas mutation of $\beta-catenin$ was detected in 2 cases. Conclusion: E-cadherin and $\beta-catenin$ seem to be important in gastric carcinogenesis, especially in poorly differentiated diffuse type.
${\alpha}$-Mangostin is a xanthon derivative contained in the fruit hull of mangosteen (Garcinia mangostana L.), and the administration of ${\alpha}$-Mangostin inhibited the growth of transplanted colon cancer, Her/CT26 cells which expressed Her-2/neu as tumor antigen. Although ${\alpha}$-Mangostin was reported to have inhibitory activity against sarco/endoplasmic reticulum $Ca^{2+}$ ATPase like thapsigargin, it showed different activity for autophagy regulation. In the current study, we found that ${\alpha}$-Mangostin induced autophagy activation in mouse intestinal epithelial cells, as GFP-LC3 transgenic mice were orally administered with 20 mg/kg of ${\alpha}$-Mangostin daily for three days. However, the activation of autophagy by ${\alpha}$-Mangostin did not significantly increase OVA-specific T cell proliferation. As we assessed ER stress by using XBP-1 reporter system and phosphorylation of $eIF2{\alpha}$, thapsigargin-induced ER stress was significantly reduced by ${\alpha}$-Mangostin. However, coadministration of thapsigargin with ${\alpha}$-Mangostin completely blocked the antitumor activity of ${\alpha}$-Mangostin, suggesting ER stress with autophagy blockade accelerated tumor growth in mouse colon cancer model. Thus the antitumor activity of ${\alpha}$-Mangostin can be ascribable to the autophagy activation rather than ER stress induction.
Kim, Eunsuk;Park, Soyeon;Cho, Seongbeom;Hahn, Tae-Wook;Yoon, Hyunjin
Journal of Microbiology and Biotechnology
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v.29
no.6
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pp.962-972
/
2019
Non-typhoidal Salmonella (NTS) is one of the most frequent causes of bacterial foodborne illnesses. Considering that the main reservoir of NTS is the intestinal tract of livestock, foods of animal origin are regarded as the main vehicles of Salmonella infection. In particular, poultry colonized with Salmonella Typhimurium (S. Typhimurium), a dominant serotype responsible for human infections, do not exhibit overt signs and symptoms, thereby posing a potential health risk to humans. In this study, comparative genomics approaches were applied to two S. Typhimurium strains, ST1539 and ST1120, isolated from a duck slaughterhouse and a pig farm, respectively, to characterize their virulence and antimicrobial resistance-associated genomic determinants. ST1539 containing a chromosome (4,905,039 bp; 4,403 CDSs) and a plasmid (93,876 bp; 96 CDSs) was phylogenetically distinct from other S. Typhimurium strains such as ST1120 and LT2. Compared to the ST1120 genome (previously deposited in GenBank; CP021909.1 and CP021910.1), ST1539 possesses more virulence determinants, including ST64B prophage, plasmid spv operon encoding virulence factors, genes encoding SseJ effector, Rck invasin, and biofilm-forming factors (bcf operon and pefAB). In accordance with the in silico prediction, ST1539 exhibited higher cytotoxicity against epithelial cells, better survival inside macrophage cells, and faster mice-killing activity than ST1120. However, ST1539 showed less resistance against antibiotics than ST1120, which may be attributed to the multiple resistanceassociated genes in the ST1120 chromosome. The accumulation of comparative genomics data on S. Typhimurium isolates from livestock would enrich our understanding of strategies Salmonella employs to adapt to diverse host animals.
Allergic diseases have increased over the past several decade worldwide including developing countries. Allergic inflammatory responses are caused by Th (T helper)2 immune responses, triggered by allergen ingestion by antigen presenting cells such as dendritic cells (DCs). Intestinal microorganisms control the metabolism and physiological functions of the host, contribute to early immune system maturation during the early life, and homeostasis and epithelial integrity during life. Bifidobacteria have strain-specific immunostimulatory properties in the Th1/Th2 balance, inhibit TSLP (thymic stromal lymphopoietin) and IgE expression, and promote Flg (Filaggrin) and FoxP3 (Treg) expression to alleviate allergies. In addition, unmethylated CpG motif ODN (oligodeoxynucleotides) is recognized by TLR (toll-like receptors)9 of B cells and plasmacytoid dendritic cells (pDCs) to induce innate and adaptive immune responses, while the butyrate produced by Clostridium butyricum activates the GPR (G-protein coupled receptors)109a signaling pathway to induce the expression of anti-inflammatory gene of pDCs, and directly stimulates the proliferation of thymically derived regulatory T (tTreg) cells through the activation of GPR43 or inhibits the activity of HADC (histone deacetylase) to differentiate naive $CD4^+$ T cells into pTreg cells through the histone H3 acetylation of Foxp3 gene intronic enhancer.
Objectives : The purpose of the present study is to evaluate the effects of herbal acupuncture (HA) with Moxi-tar for the treatment to intestinal disease in mice with 2, 4, 6 - trinitrobenzenesulfonic acid (TNBS) induced colitis. Methods : Mice were administered with 5% TNBS at day 1 and day 7. To investigate effects of HA with Moxi-tar at LI11, treatments were carried out at day -1, day 1, day 3, day 5, and day 7. It was checked on the weight and width of colon, diarrhea, edema, survival rate, changes of body weight, and myeloperoxygenase (MPO) activity. Furthermore, we carried out immunohistochemical staining and Western blot and analyzed mRNA expression by RT-PCR. Results : HA of Moxi-tar at LI11 in preventive mode suppressed macroscopic damages and damages of intestinal epithelial cells and infiltration of immune cells in the colon by TNBS. HA in early and preventive mode ameliorated various symptoms by TNBS. TNBS injection increased MPO activity in colon while HA in preventive mode suppressed increase of MPO activity. HA down-regulated NF-kB activity and reduced expression of TNF-a, IL-1b, and ICAM-1 in colon of TNBS treated mice. Similar to experiment at colon, HA down-regulated NF-kB activity and reduced expression of TNF-a, IL-1b, and ICAM-1 by TNBS in mesenteric lymph node. HA in therapeutic mode suppressed errosion and shortening of colon and MPO activity by TNBS and suppressed mRNA expression of TNF-a, IL-1b, and ICAM-1 in the colon. Conclusions : This study demonstrates that HA with Moxi-tar at LI11 represents a potential therapeutic method of inflammatory bowel diseases.
Jin Kim;Jong-Yil Chai;Weon-Gyu Kho;Kyu-Hyuk Cho;Soon-Hyung Lee
Parasites, Hosts and Diseases
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v.29
no.1
/
pp.21-30
/
1991
An immunohistochemical study was performed to demonstrate comparative antigenicity of each body structure of the liver fluke, Clonorchis sinensis, such as the digestive tract, reproductive organs, excretory system, tegument and suckers. Indirect immunoperoxidase technique was applied, rising formalin-fixed and paraffin-embedded sections of C. sinensis as the antigen. Pooled cat sera obtained 10 weeks after an experimental infection with C. sinensis and peroxidase-conjugated goat anti-cat IgG were used as the primary and secondary antibodies, respectively. The intensity of immunohistochemical stain was very sensitive upon the titers of the primary and secondary antibodies, and their optimum dilutions were found to be 1:1,000∼1:2,000 and 1:1,000, respectively. The intestinal epithelial cells, intestinal content and excretory bladder showed strong positive coloring reactions even at lower titer (1 : 2,000) of the primary antibody, whereas the uterine wall and eggs, vitelline glands, and male reproductive organs showed only weak positive reactions despite an increase in the antibody titer (1:1,000). On the other hand, the suckers, tegument, subtegumental cells and other parenchyme portions did not reveal any positive immunoperoxidase reaction at the same antibody titers. From the above results, it is highly suggested that the most potent antigenicity of C. sinensis occur from their excretory-secretory substances originated from the digestive and excretory organs.
Park, So Young;Kim, Eun Ji;Choi, Hyun Ju;Seon, Mi Ra;Lim, Soon Sung;Kang, Young-Hee;Choi, Myung-Sook;Lee, Ki Won;Yoon Park, Jung Han
Nutrition Research and Practice
/
v.8
no.3
/
pp.257-266
/
2014
BACKGROUND/OBJECTIVE: Licorice has been shown to possess cancer chemopreventive effects. However, glycyrrhizin, a major component in licorice, was found to interfere with steroid metabolism and cause edema and hypertension. The roasting process of licorice modifies the chemical composition and converts glycyrrhizin to glycyrrhetinic acid. The purpose of this study was to examine the anti-carcinogenic effects of the ethanol extract of roasted licorice (EERL) and to identify the active compound in EERL. MATERIALS/METHODS: Ethanol and aqueous extracts of roasted and un-roasted licorice were prepared. The active fraction was separated from the methylene chloride (MC)-soluble fraction of EERL and the structure of the purified compound was determined by nuclear magnetic resonance spectroscopy. The anti-carcinogenic effects of licorice extracts and licochalcone A was evaluated using a MTT assay, Western blot, flow cytometry, and two-stage skin carcinogenesis model. RESULTS: EERL was determined to be more potent and efficacious than the ethanol extract of un-roasted licorice in inhibiting the growth of DU145 and MLL prostate cancer cells, as well as HT-29 colon cancer cells. The aqueous extracts of un-roasted and roasted licorice showed minimal effects on cell growth. EERL potently inhibited growth of MCF-7 and MDA-MB-231 breast, B16-F10 melanoma, and A375 and A2058 skin cancer cells, whereas EERL slightly stimulated the growth of normal IEC-6 intestinal epithelial cells and CCD118SK fibroblasts. The MC-soluble fraction was more efficacious than EERL in inhibiting DU145 cell growth. Licochalcone A was isolated from the MC fraction and identified as the active compound of EERL. Both EERL and licochalcone A induced apoptosis of DU145 cells. EERL potently inhibited chemically-induced skin papilloma formation in mice. CONCLUSIONS: Non-polar compounds in EERL exert potent anti-carcinogenic effects, and that roasted rather than un-roasted licorice should be favored as a cancer preventive agent, whether being used as an additive to food or medicine preparations.
Objectives : The aim of this study was to experiment the antitumor activity of Agrimonia pilosa Ledebour (APL) in human stomach cancer (AGS) cell lines (in vitro) and male C57BL/6J mouse (in vivo). Methods : The effects of the ethanol extract from the plant on several transplantable rodent tumors were investigated in vitro by 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxy phenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt (MTS) assay. DNA content analysis and Western blot analysis. Agrimonia pilosa Ledebour (APL) was given to rats with Lewis Lung Carcinoma (LLC) cells. The experimental rats were divided into 3 groups in vivo. Saline was injected into the abdominal cavity in the first group, 50 mg/kg APL was injected into the abdominal cavity in the second group and 100 mg/kg was injected into the abdominal cavity in the third group. After that, we checked their tumor volume periodically. Results : At first, human gastric cancer (AGS) cell lines (in vitro) showed decreased cell viability, and increased $sub-G_1$ contents. When we experimented rat intestinal epithelial (RIE)l as same condition, this result didn't show. With this, compared to normal cells, Agrimonia pilosa Ledebour (APL) led selectively to the extinction of cells only in human gastric cancer. Moreover, we showed that the traditional herbal medicine APL induced caspase-dependent apoptosis in AGS cells. Next, APL inhibited the growth of LLC-bearing mouse tumor. However, we could not verify APL induced caspase-dependent apoptosis in LLC-bearing mouse tumor. Conclusions : The roots of Agrimonia pilosa Ledebour (APL) contain some antitumor constituents.
Park, Sun-Young;Seo, Dae-Young;Suh, Kwang-Sun;Ly, Sun-Yung
Journal of Nutrition and Health
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v.40
no.2
/
pp.138-146
/
2007
Food irradiation has been steadily increased in many countries concomitantly with increasing international trades. Harmful contaminants naturally occurred from foods which contain high levels of unsaturated fatty acids that are easily oxidized can affect the human anti-oxidation system through the generation of free radicals. Moreover, previous studies proved that ${\gamma}$-irradiation may cause production of free radicals in food. We investigated the effect of ${\gamma}$-irradiated soybeans in relation to oxidative stress in mice. Oxidative index of mice was evaluated by TBARS, DNA fragmentation in various organs such as blood lymphocytes, liver and kidney. Forty male ICR mice were equally divided into 4 groups and fed control diet or ${\gamma}$-irradiated diet containing 50% soybeans (5, 10, and 20 kGy, respectively) for 8 weeks. Peroxide values of the irradiated diets were higher than that of the non-irradiated one and increased according to the storage period. There was no significant difference in weight gain as well as in TBARS value in plasma and kidney of all groups. Liver TBARS value of the group fed with irradiated diet at 20 kGy increased significantly compared with the control group (p < 0.05). DNA oxidative damage as measured by alkaline comet assay showed that % tail DNA in the blood lymphocytes of 5 kGy and 10 kGy groups increased significantly over the control group (p < 0.05). Also, tail moments of 5 kGy and 10 kGy groups were higher than that of the control group. Ultrastructural examination shows myeline figures and swollen mitochondria in parietal and intestinal epithelial cells of the group fed with irradiated diet. Therefore, considering unsaturated fatty acid content, consumption of soybeans ${\gamma}$-irradiated with over 20 kGy or repeatedly may decrease the body's antioxidant mechanism.
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