• Journal of Ginseng Research
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• v.43 no.2
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• pp.252-260
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• 2019

Background: Increases in the average global temperature cause heat stress-induced disorders by disrupting homeostasis. Excessive heat stress triggers an imbalance in the immune system; thus protection against heat stress is important to maintain immune homeostasis. Korean ginseng (Panax ginseng Meyer) has been used as a herbal medicine and displays beneficial biological properties. Methods: We investigated the protective effects of Korean ginseng extracts (KGEs) against heat stress in a rat model. Following acclimatization for 1 week, rats were housed at room temperature for 2 weeks and then exposed to heat stress ($40^{\circ}C$/2 h/day) for 4 weeks. Rats were treated with three KGEs from the beginning of the second week to the end of the experiment. Results: Heat stress dramatically increased secretion of inflammatory factors, and this was significantly reduced in the KGE-treated groups. Levels of inflammatory factors such as heat shock protein 70, interleukin 6, inducible nitric oxide synthase, and tumor necrosis factor-alpha were increased in the spleen and muscle upon heat stress. KGEs inhibited these increases by down-regulating heat shock protein 70 and the associated nuclear $factor-{\kappa}B$ and mitogen-activated protein kinase signaling pathways. Consequently, KGEs suppressed activation of T-cells and B-cells. Conclusion: KGEs suppress the immune response upon heat stress and decrease the production of inflammatory cytokines in muscle and spleen. We suggest that KGEs protect against heat stress by inhibiting inflammation and maintaining immune homeostasis.

• Journal of Nutrition and Health
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• v.21 no.1
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• pp.36-46
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• 1988

This study was carried out to investigate the effects of different protein and fat levels on the growth and on immune response in rats. In experiment 1, Sprague-Dawly male rats were fed diets containing 6%, 15%, or 30% casein with 2 levels of fat(2% and 30%) at each protein level. In experiment 2 and 3, rats were devided into 8 diet groups ; 4 different sources of proteins(casein, meat protein, fish protein, and gluten) were used at 15% level of the diet with 2% or 30% of dietary fat. The results show as follows 1) The rats in 6% casein group showed lower body weight gain and organ weight than those in 15% and 30% casein groups. There was no significant difference between 15% and 30% casein groups. In experiment 2, the gluten diet group showed the lowest growth rate and epididymal fat pad weight among 4 different dietary protein groups regardless the level of dietary fat. 2) There was no significant difference in immune response according to the sources and levels of dietary protein. However, the rats fed high fat diet showed the lower plaque-forming cell response than those fed low fat diet regardless dietary protein.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.2356-2361
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• 2003

Proteome research in the medical field is expected to accelerate the understanding of disease mechanism, and to create new diagnostic concept. For protein profiling, this paper proposes a new methodology named CPDIB (Crude Protein Direct Blotting). In the CPDIB procedure, crude protein sample is directly immobilized on a membrane and the expression of protein molecules in the sample are analyzed quantitatively by using a special device called ImmobiChip, where the membrane is used as a field of the immune reaction. The over-all structure of the ImmobiChip is based on the conventional Slot blot device. Mechanical improvement in the air-tightness of the case holding the membrane realizes the direct blotting and results in high performance of stability in the immune reaction. In the measurement of multiple proteins, a dispensing robot is used for increasing the efficiency of handling of liquid. Cooperation of the dispensing robot with the ImmobiChip for immobilizing proteins realizes automated and stable performance of the CPDIB procedure. This paper shows the evaluation of the air-tightness of the ImmobiChip, the ability of analyzing proteins using the CPDIB procedure and the performance of the automated equipment.

• Journal of Photoscience
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• v.9 no.2
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• pp.466-469
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• 2002

An experiment has been conducted to measure the impact of UV radiation sensitivity on dermatophytes (Microsporum boullardii) by different UV radiation exposure time interval (1 min, 2 min 5 min, 10 min and 20 min) in degradation of keratin (Feather) in growth promoting substances of protein, cysteine, cystine and methionine from 7 to 28 days of incubation period. Mutant strain caused maximum weight loss with 1 minutes of UV radiation exposure at 21 day and mutant strain became immune in sensitivity at 14 days for decomposition of feathers. Maximum protein caused at 21st days with 20 minutes U.V radiation exposure and immune sensitivity had deducted with other UV radiation exposure time. On 28 days, mutant strains became immune with all exposure times, Whereas maximum methionine caused at 21st days with 20 minutes UV radiation exposure. Maximum cysteine caused at $14^{th}$ day with 5 minutes UV radiation exposure and mutant strain showed immune response at all time periods. Cystine production was also followed by cysteine at 21 day and also showed complete immune response with 1 and 2 minutes UV radiation exposure at7 and 14 days. Thus mutant strain of Microspornm boullardii can be used as a biotechnological tool for production of growth promoting substances.

• Korean journal of food and cookery science
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• v.13 no.5
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• pp.661-668
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• 1997

By using several solvents, barley extracts containing the anticomplementary activities in classical pathway were prepared (250 $\mu\textrm{g}$/ml): methanol (83.1%), ethanol (71.9%), water extract (25.4%), M-1 (250 $\mu\textrm{g}$/ml), and the soluble part of methanol extract which showed the highest activity (83.4%) and the yield. Anticomplementary activity of methanol extract as well as protease digestion in classical pathway showed 82.4% and 78.4% in the concentration of 250 $\mu\textrm{g}$/ml, respectively. It was found that protein was not involved in anticomplementary activity in the classical pathway and the methanol extract made an impact on classical pathway, but not on alternative pathway. For the immune-stimulating effect, the T cell proliferation effect of the protease digestion displayed little effect irrespective of the dose. In addition, the T cell proliferation effect of methanol extract showed 13-fold higher proliferation effect compared with positive control. It was revealed that the substance containing protein serves as an important factor for the immune proliferation. Therefore, the anticomplementary activity ${\beta}$-glucan in classical pathway and alternative pathway displayed the lowest activity, showing 2.2%, 22.3% respectively. However, the immune-stimulating effect of ${\beta}$-glucan showed the T cell stimulating effect 13 times higher than positive control.

• Korean Journal of Ecology and Environment
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• v.56 no.4
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• pp.420-429
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• 2023

This study was designed to examine the immune response in Korean rockfish during water temperature fluctuation and to elucidate the factors contributing to streptococcal pathogenesis in cultured Korean rockfish, S. schlegeli. We investigated cumulative mortality against Streptococcus iniae (FP5228 strain) infection in the exposed Korean rockfish (39.7±5.8 g) to environmentally relevant temperature (Control, 23℃; High temperature, 28℃ and 23℃ and 28℃ with 12 hours interval exchange, 23↔28℃) for 48 hours. Also, the expression of the mRNA related to the immune response genes (heat shock protein 70, interleukin1β, lysozyme g-type and thioredoxin-like 1) were measured in spleen and head kidney by real-time PCR analysis in the exposed fish to thermal stress. In this study, the combined stress with bacterial challenge in fishes exposed to thermal stress lowered the survival rate than that of control (23℃). The cumulative mortality in the group of control, 28℃ and 23↔28℃ was 24%, 24% and 40% (P<0.05), respectively. Also, thermal stress modulated the mRNA level of immune related genes; heat shock protein 70, interleukin-1β, lysozyme g-type and thioredoxin-like 1 in Korean rockfish. The present study indicates that a high and sudden water temperature change affect immune responses and reduce the disease resistance in Korean rockfish.

• BMB Reports
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• v.56 no.12
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• pp.645-650
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• 2023

Numerous studies have investigated the cellular prion protein (PrP^C) since its discovery. These investigations have explained that its structure is predominantly composed of alpha helices and short beta sheet segments, and when its abnormal scrapie isoform (PrPSc) is infected, PrPSc transforms the PrP^C, leading to prion diseases, including Creutzfeldt-Jakob disease in humans and bovine spongiform encephalopathy in cattle. Given its ubiquitous distribution across a variety of cellular types, the PrP^C manifests a diverse range of biological functions, including cell-cell adhesion, neuroprotection, signalings, and oxidative stress response. PrP^C is also expressed in immune tissues, and its functions in these tissues include the activation of immune cells and the formation of secondary lymphoid tissues, such as the spleen and lymph nodes. Moreover, high expression of PrP^C in immune cells plays a crucial role in the pathogenesis of prion diseases. In addition, it affects inflammation and the development and progression of cancer via various mechanisms. In this review, we discuss the studies on the role of PrP^C from various immunological perspectives.

• IMMUNE NETWORK
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• v.24 no.3
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• pp.21.1-21.16
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• 2024

IL-1, a pleiotropic cytokine with profound effects on various cell types, particularly immune cells, plays a pivotal role in immune responses. The proinflammatory nature of IL-1 necessitates stringent control mechanisms of IL-1-mediated signaling at multiple levels, encompassing transcriptional and translational regulation, precursor processing, as well as the involvement of a receptor accessory protein, a decoy receptor, and a receptor antagonist. In T-cell immunity, IL-1 signaling is crucial during both the priming and effector phases of immune reactions. The fine-tuning of IL-1 signaling hinges upon two distinct receptor types; the functional IL-1 receptor (IL-1R) 1 and the decoy IL-1R2, accompanied by ancillary molecules such as the IL-1R accessory protein (IL-1R3) and IL-1R antagonist. IL-1R1 signaling by IL-1β is critical for the differentiation, expansion, and survival of Th17 cells, essential for defense against extracellular bacteria or fungi, yet implicated in autoimmune disease pathogenesis. Recent investigations emphasize the physiological importance of IL-1R2 expression, particularly in its capacity to modulate IL-1-dependent responses within Tregs. The precise regulation of IL-1R signaling is indispensable for orchestrating appropriate immune responses, as unchecked IL-1 signaling has been implicated in inflammatory disorders, including Th17-mediated autoimmunity. This review provides a thorough exploration of the IL-1R signaling complex and its pivotal roles in immune regulation. Additionally, it highlights recent advancements elucidating the mechanisms governing the expression of IL-1R1 and IL-1R2, underscoring their contributions to fine-tuning IL-1 signaling. Finally, the review briefly touches upon therapeutic strategies targeting IL-1R signaling, with potential clinical applications.

• Microbiology and Biotechnology Letters
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• v.47 no.3
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• pp.449-458
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• 2019

Hepatitis B treatments using immune therapy are gaining interest because of the improvements in dendritic cell performance for antigen presentation, which induces an appropriate immune response and raises patient survival rates. This research aims to produce a significant amount of the HBcAg antigen, which can induce an immune response and have a curative effect on HBV infection. In this study, the HBV subgenotype B3 of the HBcAg gene was used, which is dominant in Indonesia. Further, Lactococcus lactis bacteria was used as the host because of its safety and tightly regulated protein expression. The codon usage for the HBcAg gene was optimized to improve protein expression in L. lactis, which is important because a codon is not random between species. The HBcAg gene is attached to a pNZ8148 plasmid and transformed into the L. lactis NZ3900 expression host. The results confirm that a positive protein band (21 kDa) in two fractions of purified HBcAg was recognized by both western blotting and dot blot hybridization, even if the HBcAg optimized codon has higher GC contents than that suggested for L. lactis expression. Overall, this research strengthens the broad use of L. lactis bacteria for any protein expression, including higher protein expression of codon optimized HBcAg gene compared to non-optimized genes. Furthermore, the improvement in the codon optimization of the HBcAg gene significantly increases the total protein expression by 10-20%, and the expression level of the codon optimized HBcAg increases 1.5 to 3.2-times that of the native HBcAg.

• The Korean Journal of Zoology
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• v.36 no.2
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• pp.200-208
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• 1993

연두금파리 종령유충의 복강내에 이물질로서 protein-A gold 용액(20 nm 크기) colloidal gold 용액(15 nm 크기), 그리고 이들의 혼합액을 주입하여 혈구가 이들을 처리하는 양상을 전자현미경을 이용하여 관찰하였다. Gold 입자에 대한 혈구의 세포성 면역작용 방식은 식세포작용이었고 이러한 식세포 작용은 연두금파리에서 확인한 prohemocyte, plasmatocyte. granulocyte type I, II, III, 그리고 oneocvtoid 등의 6가지 혈구 중 type 11 granulocyte에 의해서 수행되었다. Gold 입자는 주로 판상의 원형질 돌기를 통하여 혈구 속으로 들어갔으며 coated-pit로 보이는 구조에 의해서도 받아들이는 것으로 나타났다. 식세포 작용은 gold 용액 주입후 10분 이내에 빠른 속도로 일어났으며 시간이 경과함에 따라 gold 입자를 함유한 phagosome은 리소소음과 융합하여 phagolysosome을 형성하면서 세포질내에 축적되어 있었다. Gold 용액을 주입한 후 type II granulocyte에서는 세포질 돌기와 전자 밀도가 높은 과립, 그리고 세포 소기관이 소실되는 등의 변화가 일어났다. protein A-gold 및 colloidal gold 용액에 대한 기본적인 식세포 과정은 별다른 차이점이 없었으나 gold 입자 섭취 초기 과정과 양, 그리고 multivesicular body의 모습등에서는 차이점을 보여 주었다.