• 대한수의학회지
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• 제42권3호
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• pp.335-349
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• 2002

The immune response against Salmonella gallinarum infection was investigated in immunosuppresed chickens. Newly hatched chickens were treated with cyclophosphamide at the first and second day after birth and were challenged intraperitoneally with S gallinarum ($1{\times}10^7CFU/m{\ell}$) on day 6. Group 1, Immunosuppresed and Challenged group, was treated with cyclophaiphamide and challenged with S gallinarum; group 2, Immunosuppressed group, was only treated with cyclophsphamide; group 3, Challenged group, was only challenged with S gallinarum; group 4, Control group. In each group, the localization of lymphocytes of the lymphoid organs and intestine was immunohistochemically compared using a variety of monoclonal antiboies ($CD4^+$, $CD8^+$, and B lymphocyte). Also, S gallinarum were assessed by Maccallum-Goodpasture stain and immunohistochemical analysis in the paraffin-embedded intestinal tissues. In S gallinarum challenged chickens, $CD4^+$ and $CD8^+$ lymphocytes of the intestinal organs such as duodenum, jejunum, ileum and colon were increased. However, in cyclophophamide treated chickens, $CD4^+$ and $CD8^+$ lymphocytes and especially B lymphocytes of the lymphoid organs such as thymus, spleen, and bursa of Fabricius were dramatically decreased. These results suggest that cyclophsophamide is an immunosuppressive agent that especially causes depletion of B lymphocytes, suppress humoral immunity and eventually suppresses avian immune responses. Its protection against S gallinarum infection is mainly dependent on both cell-mediated mechanism and the humoral immune response.

• Journal of Nutrition and Health
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• 제27권5호
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• pp.483-494
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• 1994

The purpose of this study was to investigate the effect of nutritional status on the cell-mediated and humoral immunity in female college students. The nutritional status of twenty subjects was determined by six-days food records, anthropometric measurements, and biochemical assessments of serum nutrients. Cell-mediated and humoral immunity of the subjects was analyzed by in vivo and in vitro assessments. The results were summerized as follows : First, The average daily energy intake was 1437Kcal(CHO : PRO : FAT = 61:13:26), which corresponds to 71.9% of RDA. Anthropometric measurements showed that 50% of the subjects was under-weight(BMI<20), only 5% was over-weight(25

• KSBB Journal
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• 제28권4호
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• pp.260-268
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• 2013

Transgenic plant cell cultures are an attractive expression system for the production of industrial and pharmaceutical proteins because of their advantages in safety and low production cost. Human cytotoxic T-lymphocyte antigen 4-immunoglobulin (hCTLA4Ig) was produced and secreted when sugar was depleted in culture medium by transgenic rice cell lines (Oryza sativa L.) using RAmy3D promoter. Due to the production of the target protein by sugar depletion, concomitant occurrence of cell death is inevitable. For that reason, inhibition of cell death for enhancing productivity was necessary for the production period without energy sources. Supplementation of 0.1 mM sodium nitroprusside improved cell viability by 1.4-fold and maximum hCTLA4Ig production by 1.3-fold compared to those of control. Addition of 1 and 10 mM glutathione, N-acetylcysteine (NAC), and nicotinamide inhibited apoptotic-like programmed cell death by decreasing the activity of reactive oxygen species. Production hCTLA4Ig was enhanced 1.4-, 1.25-, and 1.15-fold with 10 mM NAC, 1 mM NAC, and 1 mM glutathione, respectively. In addition, it was found that the supplementation of NAC enhanced the cell viability.

• KSBB Journal
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• 제26권5호
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• pp.386-392
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• 2011

Human cytotoxic T-lymphocyte antigen 4-immunoglobulin (hCTLA4Ig), an immunosuppressive agent, was expressed in transgenic rice cells using RAmy3D promoter and RAmy1A signal peptide for the inducible production and secretion into culture media by sugar depletion. In this study, sodium butyrate was used as a small molecular enhancer (SME) to enhance the production of hCTLA4Ig in transgenic rice cell suspension cultures. When 1 mM sodium butyrate was added in sugar-free media, relative viability was not reduced, while the productivity was improved 1.3-fold. In addition, by supplementing 87 mM sodium pyruvate as an alternative energy source during the production phase, death rate of the cells was decreased. When sodium pyruvate was not added, most cells became dead at day 6. However, by adding sodium pyruvate, 18% of viability can be maintained until day 10 and the production of hCTLA4Ig was enhanced 1.4-fold. When the combination of sodium pyruvate and sodium butyrate at optimum concentrations was added, the highest viability and hCTLA4Ig production could be obtained. The highest level of hCTLA4Ig reached up to 35 mg/L at day 10.

• 약학회지
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• 제57권1호
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• pp.37-42
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• 2013

In this present study, we determined the immunoregulatory activity of ginsenoside Rd extract from Panax ginseng. To determine the activity, we tested Rd against $CD4^+$ Th cells in a murine model of type 1 diabetes, which involves Th1-dominant immunity. The type 1 diabetes was caused by streptozotocin (STZ) and the severity of the diabetes was evaluated by measuring the degree of hyperglycemia, a major symptom of diabetes. The data resulting from experiments showed that ginsenoside Rd induced a greater level of Th1 type cytokines [IFN-${\gamma}$ & IL-2] than Th2 type [IL-4 & IL-10] (P<0.05), which was determined by cytokine profile analysis. In the animal model of diabetes, the depletion of $CD4^+$ Th cells by a treatment of anti-CD4 mAb resulted in considerably lower values of blood-glucose levels than those of the mAb-untreated mice, which indicates that the Th1 immune response from $CD4^+$ Th cells are responsible for diabetes. Based on these observations, the effect of Rd on diabetes was examined in the same animal model. Results showed that Rd-treated mice groups had increased levels of blood glucose compared to Rd-untreated mice groups that were used as a negative control (P<0.05). In other words, Rd aggravated the diabetes via the Th1 immune response. In conclusion, ginsenoside Rd had an immunoregulatory activity of Th1-dominant immunity.

• Journal of Microbiology and Biotechnology
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• 제31권2호
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• pp.304-316
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• 2021

Vaccination is the most effective way to prevent influenza virus infections. However, conventional vaccines based on hemagglutinin (HA) have to be annually updated because the HA of influenza viruses constantly mutates. In this study, we produced a 3M2e-3HA2-NP chimeric protein as a vaccine antigen candidate using an Escherichia coli expression system. The vaccination of chimeric protein (15 ㎍) conferred complete protection against A/Puerto Rico/8/1934 (H1N1; PR8) in mice. It strongly induced influenza virus-specific antibody responses, cytotoxic T lymphocyte activity, and antibody-dependent cellular cytotoxicity. To spare the dose and enhance the cross-reactivity of the chimeric, we used a complex of poly-γ-glutamic acid and alum (PGA/alum) as an adjuvant. PGA/alum-adjuvanted, low-dose chimeric protein (1 or 5 ㎍) exhibited higher cross-protective effects against influenza A viruses (PR8, CA04, and H3N2) compared with those of chimeric alone or alum-adjuvanted proteins in vaccinated mice. Moreover, the depletion of CD4+ T, CD8+ T, and NK cells reduced the survival rate and efficacy of the PGA/alum-adjuvanted chimeric protein. Collectively, the vaccination of PGA/alum-adjuvanted chimeric protein induced strong protection efficacy against homologous and heterologous influenza viruses in mice, which suggests that it may be a promising universal influenza vaccine candidate.

• KSBB Journal
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• 제31권4호
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• pp.277-283
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• 2016

In this system, rice cells were genetically modified to express human cytotoxic T-lymphocyte antigen 4-immunoglobulin (hCTLA4Ig) using RAmy3D promoter induced by sugar depletion. Even though the target protein fused with signal sequence peptide, plant cell wall can be a barrier against secretion of recombinant proteins. Therefore, hCTLA4Ig can be trapped inside cell wall or remained in intracellular space. In this study, to enhance the secretion of hCTLA4Ig from cytoplasm and cell walls into the medium, permeabilizing agents, such as dimethyl sulfoxide (DMSO), Triton X-100 and Tween 20, were applied in transgenic rice cell cultures. When 0.5% (v/v) of DMSO was added in sugar-free medium, intracellullar hCTLA4Ig was increased, on the other hand, the secreted extracellular hCTLA4Ig was lower than that of control. DMSO did not give permeable effects on transgenic rice cell cultures. And Triton X-100 was toxic to rice cells and also did not give enhancing permeability of cells. When 0.05% (v/v) Tween 20 was added in rice cell cultures, however, intracellular hCTLA4Ig was lower than that of control cultures. And the maximum 44.76 mg/L hCTLA4Ig was produced for 10 days after induction, which was 1.4-fold increase compared to that of control cultures. Especially, Tween 20 at 0.05% (v/v) showed the positive effect on the secretion of hCTLA4Ig though the decrease of intracellular hCTLA4Ig. Also, Tween 20 as a non-toxic surfactant did not affect the cell growth, cell viability and protease activity. In conclusion, secretion of hCTLA4Ig could be increased by enhancing permeability of cells regardless of the cell growth, cell viability and protease activity.

• Tuberculosis and Respiratory Diseases
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• 제44권1호
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• pp.93-103
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• 1997

연구배경 : 만성 폐쇄성 폐질환 환자에서 영양결핍이 흔히 나타나며, 그 원인기전은 섭취의 부족보다는 호흡근의 열량요구량의 증가에 따른 과신진대사로 인하여 상대적인 결핍이 초래되기 때문으로 알려져 있다. 또한 만성 패쇄성 폐질환에서 영양결핍은 폐기능, 근력 및 운동수행능 등의 생리적 척도와도 유의한 상관관계를 보이며, 나아가서는 예후에도 영향을 미치는 독립적인 인자로 보고된 바 있다. 방법 : 만성 폐쇄성 폐질환 환자와 유사연령의 건강한 대조군에서 영양섭취량을 조사하였고, 신체계측과 혈액검사 등의 영양상태의 지표를 평가하였으며, 영양상태의 평가지표들과 만성 폐쇄성 폐질환의 중요한 폐기능지표인 1초간 노력성 호기량과의 상관성을 조사하였다. 결과 : 1) 대상 환자는 남자 25예였으며, 평균연령은 66.1세였고, 1초간 노력성 호기량의 예측치에 대한 비율은 $42{\pm}14%$였다. 대조군은 폐기능이 정상인 건강한 남자 26예였고, 평균연령은 65.0세였다. 2) 1일 열량섭취량/열량요구량 비율은 환자군에서 $107{\pm}28%$, 대조군에서 $94{\pm}14%$로 환자군에서 높은 경향을 보였다(p=0.06). 3) 환자군과 대조군의 비만도가 92.8% 및 101.6%로(p=0.024), 신체비만지수가 $20.0kg/m^2$ 및 $21.9kg/m^2$ 로(p=0.015), 악력이 29.0kg 및 34.3kg으로(p=0.003), 환자군에서 유의하게 낮았으나, 상완삼두근부위 피부두겹두께, 상완위 근육둘레, 알부민 및 총림프구수는 두 군간에 유의한 차이가 없었다. 환자군에서 저체중군의 비율은 40%(10/25)였고, 대조군에서는 15%(4/26)였다. 4) 비만도, 신체비만지수, 상완삼두근부위 피부두겹두께, 상완위 근육둘레 등은 1초간 노력성 호기량과 유의한 상관성이 있었다. 결론 : 이상의 결과에서 만성 패쇄성 폐질환 환자는 저체중과 말초근력의 저하 등 영양결핍의 소견을 보이나, 그 원인이 섭취량은 부족에 기인하지 않음을 알 수 있었으며, 영양상태 평가의 지표들이 1초간 노력성 호기량과 유의하게 상관됨을 알 수 있었다.