Alcohol dependence is a global public health problem, yet the mechanisms of alcohol dependence are incompletely understood. The traditional view has been that ethanol alters various neurotransmitters and their receptors in the brain and causes the addiction. However, an increasing amount of experimental evidence suggests that gut microbiota also influence brain functions via gut-to-brain interactions, and may therefore induce the development of alcohol use disorders. In this study, a rat model of alcohol dependence and withdrawal was employed, the gut microbiota composition was analyzed by high-throughput 16S rRNA gene sequencing, and the metagenome function was predicted by PICRUSt software. The results suggested that chronic alcohol consumption did not significantly alter the diversity and richness of gut microbiota in the jejunum and colon, but rather markedly changed the microbiota composition structure in the colon. The phyla Bacteroidetes and eight genera including Bacteroidales S24-7, Ruminococcaceae, Parabacteroides, Butyricimonas, et al were drastically increased, however the genus Lactobacillus and gauvreauii in the colon were significantly decreased in the alcohol dependence group compared with the withdrawal and control groups. The microbial functional prediction analysis revealed that the proportions of amino acid metabolism, polyketide sugar unit biosynthesis and peroxisome were significantly increased in the AD group. This study demonstrated that chronic alcohol consumption has a dramatic effect on the microbiota composition structure in the colon but few effects on the jejunum. Inducement of colonic microbiota dysbiosis due to alcohol abuse seems to be a factor of alcohol dependence, which suggests that modulating colonic microbiota composition might be a potentially new target for treating alcohol addiction.
Han, Rafael Taeho;Kim, Han-Byul;Kim, Young-Beom;Choi, Kyungmin;Park, Gi Yeon;Lee, Pa Reum;Lee, JaeHee;Kim, Hye young;Park, Chul-Kyu;Kang, Youngnam;Oh, Seog Bae;Na, Heung Sik
The Korean Journal of Physiology and Pharmacology
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v.22
no.2
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pp.173-182
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2018
Recent studies have provided several lines of evidence that peripheral administration of oxytocin induces analgesia in human and rodents. However, the exact underlying mechanism of analgesia still remains elusive. In the present study, we aimed to identify which receptor could mediate the analgesic effect of intraperitoneal injection of oxytocin and its cellular mechanisms in thermal pain behavior. We found that oxytocin-induced analgesia could be reversed by $d(CH_2)_5[Tyr(Me)^2,Dab^5]$ AVP, a vasopressin-1a (V1a) receptor antagonist, but not by $desGly-NH_2-d(CH_2)_5[D-Tyr^2,Thr^4]OVT$, an oxytocin receptor antagonist. Single cell RT-PCR analysis revealed that V1a receptor, compared to oxytocin, vasopressin-1b and vasopressin-2 receptors, was more profoundly expressed in dorsal root ganglion (DRG) neurons and the expression of V1a receptor was predominant in transient receptor potential vanilloid 1 (TRPV1)-expressing DRG neurons. Fura-2 based calcium imaging experiments showed that capsaicin-induced calcium transient was significantly inhibited by oxytocin and that such inhibition was reversed by V1a receptor antagonist. Additionally, whole cell patch clamp recording demonstrated that oxytocin significantly increased potassium conductance via V1a receptor in DRG neurons. Taken together, our findings suggest that analgesic effects produced by peripheral administration of oxytocin were attributable to the activation of V1a receptor, resulting in reduction of TRPV1 activity and enhancement of potassium conductance in DRG neurons.
Journal of the Korean Society of Food Science and Nutrition
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v.46
no.2
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pp.169-176
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2017
Non-alcoholic fatty liver disease (NAFLD) is caused by chronic lipid accumulation due to dysregulation of lipid metabolism in the liver, and it is associated with various human diseases such as obesity, dyslipidemia, hypertension, and diabetes. Histone acetylation is a representative epigenetic mechanism regulated by histone acetyltransferases (HATs) and deacetylases. We observed that tartary buckwheat sprout (TBS) suppressed lipid accumulation in HepG2 cells through its anti-HAT activity. We showed that TBS was a novel HAT inhibitor with specificity for the major HAT enzyme p300. Importantly, TBS reduced acetylation of total and histone proteins, H3K9, H3K36, and H4K8, resulting in decreased transcriptional activities of sterol regulatory element-binding protein 1c, ATP citrate lyase, and fatty acid synthase. These results suggest that TBS inhibits the NAFLD transcription-modulating activity of lipogenesis-related genes through modification of histone acetylation.
Recent studies have shown that cytokines are capable of modulating cardiovascular function and that some drugs used in the treatment of heart failure variably modulate the production of cytokines. Hige- namine, a positive inotropic isoquinoline alkaloid, has been used traditionally as cardiac stimulant, and reported to reduce nitric oxide (NO) and inducible nitric oxide synthase (iNOS) expression in LPS- and/or cytokine-activated cells in vitro and in vivo. Therefore, we investigated whether higenamine modulates the production of proinflammatory cytokines in myocardial infarction. In addition, effects of higenamine on antioxidant action and antioxidant enzyme expression (MnSOD) were studied. Myocardial infarction (MI) was confirmed by measuring left ventricular (LV) pressure after occlusion of the left anterior descending coronary artery (LAD) for 5 weeks in rats. Treatment of higenamine (10 mg/kg/day) reduced infarct size about 35 %, which accompanied by reduction of production TNF-$\alpha$, IL-6, but not IFN-${\gamma}$ and IL-1$\beta$ in the myocardium. The expression of TNF-$\alpha$ mRNA in infracted myocardium was significantly reduced by higenamine. Although iNOS mRNA was not detected, nitrotyrosine staining was significantly increased in myocardium of Ml compared to higenamine-treated one, Indicating that peroxynitrite-induced damage is evident in MI. Cytochrome c oxidation by peroxynitrite was concentration-dependently reduced by higenamine, an effect which was almost compatible to glutathion. Higenamine treatment did not affect the expression of MnSOD mRNA in myocardial tissues in MI. Taken together, higenamine may be beneficial in oxidative stress conditions such as ischemic-reperfusion injury and MI due to antioxidant action as well as modulation of cytokines.
Hwang, Mi Sun;Kim, Tae Hee;Lee, Jeong Jun;Kwon, JungKee;Lee, Jin Young
Journal of Life Science
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v.30
no.6
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pp.542-549
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2020
A previous study reported that Ulmus macrocarpa Hance water extract (UME) can improve hyperlipid metabolism and the involvement of suppressed lipid synthesis through adenosine monophosphate-activated protein kinase (AMPK) pathway regulation was suggested. Further exploration of the lipid metabolism between liver and peripheral tissue was necessary to confirm that work, and so this study aimed to extend the possibility that UME can regulate serum lipids. After a 6-week in vivo trial of oral administration of UME to rats with induced hyperlipidemia, serum levels of triglyceride (TG) and total cholesterol (TC) were seen to decrease while HDL cholesterol increased. The UME administrations also decreased the TC and TG levels from the control in liver analysis. However, the suggestion that UME regulates the AMPK pathway to improve hyperlipid states through the suppression of hepatic lipogenesis seems to be only one part of the extract's effect. Indeed, serum concentrations of apolipoproteins A and B were returned to baseline levels of the control group in response to UME administration whilst the liver lipid content was much reduced; this cannot occur through the suggested suppression of hepatic lipogenesis alone. Therefore, a possible mechanism of UME could be that it improves blood circulation by modulating serum lipid levels through both the prior stimulation of lipid oxidation and the suppression of hepatic lipogenesis.
Fawzy, Mariam M;Wahid, Ahmed;Nazmy, Maiiada H;Hashem, Mohamed;Waked, Imam;Abdelwahab, Sayed F
Asian Pacific Journal of Cancer Prevention
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v.17
no.4
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pp.2093-2097
/
2016
Background: HCV is a major global health problem. IL-27 is a member of the IL-6/IL-12 cytokine family with a broad range of anti-inflammatory properties. Recent studies highlighted the effect of a SNP in the IL-27 promoter region on modulating the progression of infectious diseases and individual responses to therapy. Aim of the work: The present study investigated the potential role of (-964 A/G) SNP in the promoter region of IL-27p28 gene (alleles rs153109) on the outcome of HCV infection among genotype 4a infected patients. Materials and Methods: HCV genotyping confirmed that all of the HCV-infected patients had genotype 4a infection. Genomic DNA was extracted from 111 patients with chronic HCV infection, 42 spontaneous resolvers (SR) and 16 healthy controls. IL- 27p28.rs153109 genotyping was assessed using PCR-RFLP then confirmed by DNA sequencing. Results: The frequency of IL-27-p28.rs153109AA, AG, and GG genotypes among chronically infected subjects were 74.8 %, 25.2%, and 0% while among the SR, they were 57.1%, 35.7%, and 7.14%, respectively. Our data show the unique presence of G/G genotype in the SR group (3 patients; 7.14%). Moreover, the "G" allele frequencies among chronic and resolved subjects were 12.6% and 25.0%, respectively (p=0.0136). Importantly, subjects with the GG genotype were more likely to clear their HCV infection than those with the AA genotype (p=0.0118). Conclusions: HCV genotype 4a subjects with the IL-27-p28.rs153109 A/G and G/G genotype were more likely to clear their HCV infection. Therefore, we propose IL- 27p28.rs153109SNPas a genetic biomarker for predicting HCV infection outcome.
Background : Asthma is a chronic inflammatory disorder under immunological influence. Shinbi-tang and Gamishinbi-tang are herbal decoctions used for treating asthma in traditional herbal medicine. Objective : To evaluate the effects of Shinbi-tang and Gamishinbi-tang on immune cell & serum OA-specific IgE in broncho-alveolar lavage fluid (BALF) in rat asthma model. Material and Methods : Rats were sensitized with ovalbumin (OA); at day 1 sensitized group and Shinbi-tang and Gamishinbi-tang groups were systemically immunized by subcutaneous injection of 1mg OA and 300mg of Al(OH)$_3$ in a total volume of 2ml. At the same time, 1 ml of 0.9% saline containing 6 x 10$^{9}$ B. pertussis bacilli was injected by i.p. 14 days after the systemic immunization, rats received local immunization by inhaling 0.9% saline aerosol containing 2%(wt/vol) OA. A day after local immunization, HAL fluid was collected from the rats. Rats were orally administered with each of Shinbi-tang and Gamishinbi-tang extract for 14 days from the day after local immunization. Lymphocyte, CD4+ T cell CD8+ T cell counts, CD4+/CD8+ ratio in BALF, change of serum OA-specific IgE level, CD4+ T cell CD8+ T cell percentages in the peripheral blood were measured and evaluated. Results : Shinbi-tang and Gamishinbi-tang showed an alleviating effect on asthmatic responses of rats. Shinbi-tang decreased total cell, lymphocyte, CD4+ T cell in BALF, serum OA-specific IgE level as compared with the control group. Gamishinbi-tang decreased total cell, lymphocyte, CD4+ T cell, and CD4+/CD8+ ratio in HALF as compared with the control group. CD4+/CD8+ ratio in HALF from Shinbi-tang group and serum OA-specific IgE level from Gamishinbi-tang group didn't show any significant variation from control group. CD8+ T cell in HALF, CD3+CD4+ T cell and CD3+CD8+ T cell percentages in peripheral blood showed no significant variation among groups. Conclusion : Shinbi-tang and Gamishinbi-tang alleviated asthmatic hypen-eactivity of the rat immune system through CD4+ T cell and serum IgE. Further the study of immune system modulating mechanism is expected.
Kam, Kyung-Yoon;Shin, Seung Yub;Han, Seong Kyu;Li, Long Hua;Chong, Wonee;Baek, Dae Hyun;Lee, So Yeong;Ryu, Pan Dong
Korean Journal of Veterinary Research
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v.44
no.2
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pp.207-215
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2004
It is well known that the hypothalamic-pituitary-adrenocortical (HPA) axis is under the negative feedback control of adrenal corticosteroids. Previous studies have suggested that glucocorticoids can regulate neuroendocrine cells in the paraventricular nucleus (PVN) by modulating catecholaminergic transmission, a major excitatory modulator of the HPA axis at the hypothalamic level. But, the effects of corticosteroids on the expression of adrenoceptor subtypes are not fully understood. In this work, we examined mRNA levels of six adrenoceptor subtypes (${\alpha}_{1A}$, ${\alpha}_{1B}$, ${\alpha}_{2A}$, ${\alpha}_{2B}$, ${\beta}_1$ and ${\beta}_2$) in the PVN of normal and adrenalectomized (ADX) rats. Total RNA ($2.5{\mu}g$) was extracted from PVN micropunches of brain slices ($500{\mu}m$) and analyzed by reverse transcription-polymerase chain reaction (RT-PCR). The levels of corticotropin-releasing hormone (CRH) mRNA were increased in the ADX rats relative to normal rats, indicating that the PVN had been liberated from the negative feedback of corticosteroids. Among the six adrenoceptor subtypes examined, mRNA levels for ${\alpha}_{1B}$- and ${\beta}_1$-adrenoceptors were increased, but the level for ${\beta}_2$-adrenoceptors was decreased in the ADX rats. The mRNA levels for the other three subtypes and for the general and neuronal specific housekeeping genes, glyceroaldehyde-3-phosphate dehydrogenase (GAPDH) and N-enolase, respectively, were not changed in the ADX rats. In conclusion, the results indicate that adrenal steroids selectively regulate the gene expression of adrenoceptor subtypes in the PVN.
Fatty acid transporter protein 1 (FATP1) is highly expressed in skeletal muscle and modulates fatty acid uptake and metabolism. However, the influence of insulin-like growth factor-I (IGF-I), a master regulator of skeletal muscle cells, on FATP1 in skeletal muscle cells has not been demonstrated. To investigate the effect of IGF-I on FATP1 and the expression of the IGFBP5 protein, differentiated C2C12 murine skeletal muscle cells were treated with 20 ng/ml of IGF-I at different time points. The results showed that IGF-I increased FATP1 and IGFBP5 protein expression in a time-dependent manner. To determine whether this induction of FATP1 by the IGF-I treatment was regulated pretranslationally, the mRNA level of FATP1 was measured by real-time quantitative PCR. The IGF-I treatment resulted in very rapid induction of the FATP1 mRNA transcript in C2C12 myotubes. FATP1 mRNA increased 169% and 132% after 24 and 48 h of the IGF-I treatment, respectively, and it returned to control levels after 72 h of the treatment, suggesting that the FATP1 gene is regulated pretranslationally by IGF-I in skeletal muscle cells. This is the first evidence that IGF-I can regulate the expression of FATP1. In conclusion, IGF-I induced rapid transcriptional modification of the FATP1 gene in C2C12 skeletal muscle cells and had modulating effects on fatty acid uptake proteins and oxidative proteins.
Changing social conditions have resulted in a situation where elderly patients are no longer cared for by family and where medical care hospitals play a more prominent role. In this study, the unique elements of the medical service required from a long term care hospital were identified using conventional and exploratory analysis, and the causal relationship between medical service quality, relationship quality, and Revist intent was confirmed. The intermediary role and the quantitative importance of relationship quality (including trust and commitment) were also characterized. This study identifies the key points and indicators that the administrators of a long term care hospital can use to effectively plan their medical service offering in order to secure the commitment of customers through relationship quality. The theoretical indications of this study are set out below. First, four factors are selected as being the key elements determining service quality: medics, administrative service, healthcare environment, and subsidiary facilities. Second, it seems that medics, administration service, and the healthcare environment have some effect on the evaluations made in relation to trust and satisfaction (subsidiary facilities are not considered to be a key element). Third, patient satisfaction has a positive impact on trust and commitment and can be regarded as a key element for establishing connections. Fourth, commitment is likely to be strengthened when trust is significant. Fifth, as trust and commitment increase, revist intent strengthens. Lastly, this study illustrates how the levels of trust and commitment play a modulating role between patient satisfaction and revist intention. There are many practical indications from the findings of this study. First, the influences of medics, the administrative service, and the healthcare environment on trust and satisfaction vary. Especially, the healthcare environment is likely to be more important than medics. Accordingly, it is essential to establish an elderly-friendly environment, to improve a hospital's structure, and to maintain a clean environment. Second, medics must show compassion to their patients and be patient when providing explanations to elderly patients who often lack powers of concentration. Third, in order to establish patient trust, it is essential that medics provide an excellent medical service. Ultimately, these elements of relationship quality may strengthen the revist intention of elderly patients.
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