• Title/Summary/Keyword: immune tolerance

Search Result 127, Processing Time 0.024 seconds

The current status of fumonisin toxicosis in domestic animals: A review (가축의 fumonisin 중독증에 대한 최근 연구 동향 : 종설)

  • Lim, Chae-woong;Rim, Byung-moo
    • Korean Journal of Veterinary Research
    • /
    • v.35 no.2
    • /
    • pp.405-416
    • /
    • 1995
  • FBs, secondary metabolites of several species of Fusaria, especially Fusarium moniliforme and F proliferatum, are commonly contaminated in com and other food grains throughout the world. Only recently identified, these mycotoxins have been associated field outbreaks of ELEM in horses and PPE in pigs. Currently, naturally or experimentally induced FB toxicosis has been studied in poultry, ruminants and rabbits. Poultry fed FB showed decreased growth rate, performance, and immune competence, as well as embryopathic, and embryocidal effects, and ricktes. Ruminants seem to be relatively less susceptible to FBs than other doestic animal. FB toxicosis reveals that liver is a target organ in all species, although other organs are affected in a species specific manner. Recently, the main target organs for $FB_1$ toxicity in rabbits was shown to be the kidney. Even low concentrations of FBs are likely to be a problem for animal health. A current study being conducted showed that feed containing low level of $FB_1$ reduces the ability of pulmonary intravascular macrophages in pig to clear blood-borne particles which would increase the susceptibility of animals to bacterial disease. The mechanism of FB toxicity remains unknown, but may be related to altered sphingolipid biosynthesis by inhibiting sphinganine N-acyltransferase. Elevations of serum and tissue SA:SO ratio have been observed in horse, pig, chicken, turkey, and rabbit, which could could serve as in effective biomarker for consumption of FB-containing feeds. There is limited information detailing dose-effect relationships either from field cases or in the laboratory. More research on the factors, including the prevalence and tolerance levels of FBs in feedstuffs that cause domestic animal disease associated with FBs, is urgently needed.

  • PDF

Current Status of Face Transplantation: Where Do We Stand in Korea? (안면이식에 대한 최근 동향: 한국에서의 안면이식은 어떤 단계에 있는가?)

  • Hong, Jong Won;Kim, Young Seok;Yun, In Sik;Lee, Dong Won;Lee, Won Jai;Roh, Tai Suk;Lew, Dae Hyun;Kim, Yong Oock;Rah, Dong Kyun;Tark, Kwan Chul;Yun Park, Be-Young
    • Archives of Craniofacial Surgery
    • /
    • v.13 no.2
    • /
    • pp.85-94
    • /
    • 2012
  • The world's first face transplantation was performed in France, in 2005. Since then, 21 cases of face transplantation have been performed. Face transplantation is one of the most prominent part of composite tissue allotransplantation (CTA) along with hand transplantation. Since these fields are not deal with life-saving organs, there are many arguments about immunosuppression therapy. Recent paradigm of face transplantation shows that surgical ranges are expanded from partial face transplantation to full face transplantation. Most immunosuppression protocols are triple therapy, which consists of tacrolimus (FK-506), mycophenolate mofetil and prednisolone. Anatomical researches, immunosuppression, and immunotolerance take great parts in the researches of CTA. The medical fields directly related to face transplantation are microsurgery, immunology, and transplantation. Nowadays, each field is performed widely. Therefore people, even medical teams think face transplantation could be easily realized, sooner or later. But there are lots of things that should be prepared for not only practice and immunosuppression therapy but also for the cooperation with relevant fields. That's the reason why only 21 cases of face transplantation have been done, while more than 70 cases of hand transplantation have been done in the past years. Especially in Korea, brain death patients are not enough even for organ transplantation and furthermore there are some troubles in taking part in the society of transplantation. Face transplantation has lots of problems concerning variable medical fields, administration, society, ethics, and laws. Therefore, for the realization of face transplantation in Korea, not only medical skills but also political powers are needed.

Immunological benefits by ginseng through reciprocal regulation of Th17 and Treg cells during cyclosporine-induced immunosuppression

  • Heo, Seong Beom;Lim, Sun Woo;Jhun, Joo Yeon;Cho, Mi La;Chung, Byung Ha;Yang, Chul Woo
    • Journal of Ginseng Research
    • /
    • v.40 no.1
    • /
    • pp.18-27
    • /
    • 2016
  • Background: It is not clear whether ginseng affects cyclosporine A (CsA)-induced desirable immunosuppressive action. In this study, we evaluated the immunological influence of combined treatment of ginseng with CsA. Methods: Using CD4+ T cells from mouse spleens stimulated with the T cell receptor (TCR) or allogeneic antigen-presenting cells (APCs), we examined the differentiation of naïve T cells into T helper 1 (Th1), Th2, Th17, and regulatory T cells (Tregs), and their cytokine production during treatment by Korean Red Ginseng extract (KRGE) and/or CsA. The influence of KRGE on the allogeneic T cell response was evaluated by mixed lymphocyte reaction (MLR). We also evaluated whether signal transducer and activator of transcription 3 (STAT3) and STAT5 are implicated in this regulation. Results: Under TCR stimulation, KRGE treatment did not affect the population of CD4+interferon gamma ($IFN{\gamma}$)+ and CD4+interleukin (IL)-4+ cells and their cytokine production compared with CsA alone. Under the Th17-polarizing condition, KRGE significantly reduced the number of CD4+IL-17+ cells and CD4+/phosphorylated STAT3 (p-STAT3)+ cells, but increased the number of CD4+CD25+forkhead box P3 (Foxp3)+ cells and CD4+/p-STAT5+ cells compared with CsA alone. In allogeneic APCs-stimulated CD4+ T cells, KRGE significantly decreased total allogeneic T cell proliferation. Consistent with the effects of TCR stimulation, KRGE reduced the number of CD4+IL-17+ cells and increased the number of CD4+CD25+Foxp3+ cells under the Th17-polarizing condition. Conclusion: KRGE has immunological benefits through the reciprocal regulation of Th17 and Treg cells during CsA-induced immunosuppression.

A Study on the Ecological Restoration Strategies for the Disturbed Landscapes (경관훼손지의 생태적 복구방안에 관한 연구)

  • Kim, Nam-Choon
    • Journal of the Korean Society of Environmental Restoration Technology
    • /
    • v.1 no.1
    • /
    • pp.28-44
    • /
    • 1998
  • This study was conducted to suggest the ecological restoration strategies for the disturbed landscapes by theoretical study. Especially, it is aimed to suggest three objectives for restoration by using native plants ; (1) prevention or reduction of wind and water erosion, (2) provision of food and cover for variety of animal species, (3) improvement of the visual or aesthetic quality of disturbed sites. The main results were summarized as follows. 1. Cooperation between restoration ecologists and restoration practitioners is needed to delineate a scientific approach to restoration ; (1) Being aware of published literature that describes similar work and/or establish general principles. (2) Preparedness to carry out proper experiments to test ideas. (3) Preparedness to monitor fundamental parameters in a restoration scheme. (4) Providing information about the behavior of species. (5) Publish results. 2. There are three models of succession in theories of plant succession. The tolerance and facilitation models were recommended to ecological restoration. The inhibition model applies in most secondary succession, but the actual species which are introduced first may inhibit the germination and growth of slower-growing species, or they may prevent the growth of other species whose propagules arrive later. 3. The objectives of erosion control, wildlife habitat provision, and visual quality improvement are not mutually exclusive. However, many revegetation practices in the past have emphasized one of these aspects at the expense of the others. 4. A native plant community can be the model of ecological restoration. By stylization/abstraction of native plant community, trying to learn the most essential characteristics of community types - environmental factors ; dominant, prevalent, and "visual essence" species composition - in order to use such information in restoration. 5. After developing mass/spaces plan, match plant communities to the mass/space plan. In utilizing community grouping, there needs aesthetic ability to understand design elements. 6. Several hydrophytes such as Pennisetum saccharifluous, Themeda triandra, Cirsium pendulum show relatively good germination rates. In case of mesophytes and xerophytes, Arundinella hina, Artemisia princeps, Oenothera odorata and legumes seem to have quick-germinating abilities at barren sites. Pinus thunbergii, Rhus chinensis, Evodia daniellii, Alnus firma and Albizzia julibrissin can be considered as "late succession" woody plants because they show low germinating rates and slow growing habitat. 7. The seeds used for restoration should be collected within a certain radius of where it will be planted. Consideration in genetic issues in the collection and use of germplasm can increase the odds for successful restoration efforts. 8. The useful model in the "drift" pattern occurs so abundantly in naturally evolving landscapes. As one species diminishes in density, a second or third species are increased. Thus, dynamic interactions between species are created. Careful using of "drift phenomenon" in planting was recommended. 9. Virtually no stand of vegetation today is immune from the introduction and/or spreading of exotic species. Therefore, the perpetuation of a restored sites requires conscious monitoring and management. Thus, management would be the most important process in ecological restoration. 10. In order to keep the sites "natural", alternative management strategies would be applied in management ; Atenative management strategies are decelerating successional process, accelerating successional processes or modifying species composition. As management tools, mechanical, chemical, biological or environmental factor manipulation, e.g., fire could be used.

  • PDF

Effect of stabilized rice bran-added high sucrose diet on glucose control in C57BL/6 mice (안정화미강을 첨가한 고서당식이 섭취가 C57BL/6 mice의 혈당조절에 미치는 영향)

  • Lee, Seung-Min;Shin, Mal-Shick;Heo, Young-Ran
    • Journal of Nutrition and Health
    • /
    • v.47 no.3
    • /
    • pp.157-166
    • /
    • 2014
  • Purpose: Rice bran is a byproduct of the hulling of rice and contains a variety of bioactive components. Various studies have reported on the antioxidative, anticancer, immune-enhancing, and hypocholesterolemic effects of rice bran. However, few studies about the physiological activity of stabilized rice bran supplement on dietary intake of sugars is limited. The aim of this study was to investigate the effect of stabilized rice bran supplement on blood glucose in C57BL/6 mice fed a high sucrose diet. Methods: Animals were randomly divided into three groups respectively, and were fed a normal diet (ND group), a high sucrose diet (HSD group) or a high sucrose diet containing 20% stabilized rice bran (HSD-SRB group) for 12 weeks. Results: In the oral glucose tolerance test (OGTT), after seven weeks of feeding on the experimental diets, a significantly lower result was observed for HSD-SRB than for HSD at 30 and 60 minutes after oral administration in glucose solution (2 g/kg body weight). The incremental area under the curve (IAUC) of HSD-SRB was significantly lower than that of HSD. After 12 weeks, fasting blood glucose level of HSD-SRB was significantly lower than that of HSD. No significant difference in the serum insulin level was observed between HSD and HSD-SRB. However, HOMA-IR was significantly decreased in HSD-SRB compared to HSD. In addition, HOMA ${\beta}$-cell was significantly increased in HSD-SRB compared to HSD. Triglyceride in liver of HSD-SRB was significantly lower than that of HSD. Conclusion: Feeding diets containing 20% rice bran improved insulin resistance and insulin secretion by decreasing triglyceride in liver. Thus, rice bran has a positive effect on glycemic control. In addition, the results are expected to be utilized as a basis for human study and development of food products with added rice bran.

Effect of Surfactin on Growth Performance of Weaning Piglets in Combination with Bacillus subtilis BC1212 (바실러스 섭틸리스 BC1212와 설팩틴의 병용투여가 이유돈의 성장에 미치는 영향)

  • Kim, Myoung-Seok;Lim, Jong-Hwan;Park, Byung-Kwon;Hwang, Yun-Hwan;Song, In-Bae;Park, Seung-Chun;Yun, Hyo-In
    • Journal of Veterinary Clinics
    • /
    • v.26 no.2
    • /
    • pp.117-122
    • /
    • 2009
  • The aim of this study is to investigate the effects of surfactin in combination with Bacillus subtilis BC1212 isolated from Korean soybean paste, on feed utilization and growth performance during 4 weeks in weaning piglets. Eighteen weaning piglets(Landrace$\times$Yorkshire$\times$Duroc; weighing $7.68{\pm}0.97\;kg$) were divided into control(n=9) and experimental groups(n=9). The treatments included a control group consisting of the basal diet with no additives(control) and an experimental group consisting of the basal diet supplemented with 1 g of surfactin C and $1.0{\times}10^9CFU$ of Bacillus subtilis BC1212/kg feed. Piglets fed Bacillus subtilis BC1212 increased in average daily weight gain and feed efficiency. In comparison with the control group, the fecal Bacillus subtilis were significantly increased and the fecal coliform bacteria were markedly reduced in the experimental group. In addition, Bacillus subtilis BC1212 had excellent acid and bile tolerance. The treatment of surfactin($50{\mu}g\;ml^{-1}$) in lipopolysaccharide(LPS)-stimulated swine peripheral blood mononuclear cells(PBMCs) for 6 h showed a significant inhibitory effect on INF-$\gamma$, TNF-$\alpha$ and NO secretion(p<0.05) in comparison with LPS treatment alone but not on IL-10 secretion, with levels of secreted IL-10 similar to those secreted by PBMCs stimulated with LPS alone. Supplementation with surfactin in combination with Bacillus subtilis BC1212 in diets improved the ecosystem of gastrointestinal tract by increasing probiotic population and enhanced the systemic immune response in weaned piglets.

Patient-related Barriiers to Pain Management in General Population (일반인의 통증관리 장애정도)

  • Yoo, Yang-Sook;Choe, Sang-Ok;Cho, Young-Yi;Koh, Su-Jin;Hor, Soo-Jin;Jeon, Ji-In;Kwon, So-Hi
    • Journal of Hospice and Palliative Care
    • /
    • v.10 no.4
    • /
    • pp.184-189
    • /
    • 2007
  • Purpose: This study was to explore barriers to effective pain management in general population. Methods: Total 163 Participants completed the Barrier Questionnaire-II (BQ-II), a 27-item on a six point scale, from May to June in 2007. BQ-II consisted of four subscales which were 1) physical effects (PE) addressing beliefs that side effects of analgesics are inevitable and concerns about tolerance, fatalism (Fa) addressing fatalistic beliefs about cancer pain and its management, Communication (Co) addressing the beliefs of 'good patient' and concerns of distracting physician from underlying disease, and harmful effects (HE) addressing fear of addiction and harmful effect to immune system of pain medicine. Results: The BQ-II total had an internal consistency of 0.877 in this study. HE was the biggest barrier (3.03) followed by PE (2.73), Fa (2.15), and Co (1.71). Items appeared as great concerns were 'there is a danger of becoming addicted to pain medication'(3.58), 'using pain medicine blocks your ability to know if you have any new pain' (3.18), 'pain medicine is very addictive' (3.09), 'when you use pain medicine your body becomes used to its effects and pretty soon it won't work any more' (3.09), and 'drowsiness from pain medicine is difficult to control' (3.09). Only 12 respondents (7.4%) reported that they took any type of pain education, however, those who took pain education represented significantly lower barriers to pain management than who did not (P=.029). Conclusion: This result suggests the strategies for public education to surmount cancer pain.

  • PDF