• 한국가스학회지
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• 제22권3호
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• pp.45-52
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• 2018

국제해사기구(IMO)의 선박 배출가스 기준 강화로 인해 LNG 연료추진선박의 필요성이 대두되고 있으며 관련 분야에 대한 기술개발 및 실용화 촉진 연구가 활발하게 진행되고 있다. LNG 연료탱크는 운항 중 연료소비로 인하여 잔류량이 70% 미만이 될 경우 슬로싱을 고려하여야 하므로 재액화 장치를 탑재하기 어려운 중소형 LNG 연료추진선박은 Type C 형태의 압력 탱크가 적용될 가능성이 높다. 이러한 LNG 연료추진선박에 적용되는 LNG 탱크는 구조적 안전성과 더불어 LNG를 오래 보관하기 위한 단열성능이 매우 중요하다. 본 연구에서는 Type C LNG Tank에 대한 단열성능 평가 절차를 제안하였고, 실험을 통해 LNG 탱크의 열적 특성으로 인한 온도, 압력, BOG(Boil Off Gas)의 변화를 비교, 분석함으로서 BOR(Boil Off Rate) 테스트 절차에 대한 타당성과 유효성을 검증하였다.

• Clinical and Experimental Reproductive Medicine
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• 제32권3호
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• pp.217-222
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• 2005

Objectives: We aimed to investigate the clinical effect of low-dose intravenous immunoglobulin treatment in unexplained recurrent spontaneous aborters (RSA) with elevated peripheral CD56+ natural killer (NK) cell levels and to determine the pre-conceptional NK cell percentage predictive of subsequent successful pregnancy outcome. Materials and Methods: Sixty four cases of unexplained recurrent miscarriage with elevated peripheral NK cells (>15%) were received low dose IVIg infusion at the dosage of 400 mg/Kg/month after confirmation of gestational sac and continued until 20 weeks. The patients were divided into two groups according to the pregnancy outcome: Group I was success of treatment defined as live birth at or after 25 gestational weeks and Group II was failure of treatment. The preconceptional levels of the peripheral blood NK cells were compared between two groups. Results: Fifty-three pregnancies resulted in live births after 25 weeks and 11 resulted in abortion (Overall success rate of IVIG treatment was 82.8%). Preconceptional CD56+ NK cell percentage in group II ($27.4{\pm}1.9%$) was higher than those in group I ($22.3{\pm}0.8%$). By using ROC curve, optimal discrimination between success and failure of treatment was achieved with ${\leq}27%$ of preconceptional NK cell percentage. Conclusion: In RSA patients with elevated NK cells, we suggest that preconceptional peripheral blood CD56+ NK cell level could be a useful marker for predicting successful treatment outcome of low-dose IVIg infusion.

• Tuberculosis and Respiratory Diseases
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• 제42권5호
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• pp.744-751
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• 1995

연구배경: 여러 종류의 자극으로 감각신경(C-fiber)의 말단부에서 분비되는 신경단백질인 substance P와 neurokinin A는 기관지 평활근의 수축, 점막의 혈장 유출 및 점액의 과분비를 일으켜 기관지 천식 발병 기전에 중요한 역활을 한다. 이러한 기도 신경단백질은 $NK_1$, $NK_2$, $NK_3$ 등의 3종류의 수용체를 통하여 작용하며, $NK_1$ 수용체에 주로 작용하는 substance P는 기도의 혈관확장과 혈장 유출에 관여하며 $NK_2$ 수용체에 작용하는 neurokinin A는 기도의 수축에 주로 작용하며 기도혈장 유출에도 관여하는 것으로 알려져 있다. 목적: 저지들은 백서의 미주신경인 비교감 및 비부교감 신경을 전기적 자극으로 유발된 기도 혈장 유출에서 $NK_1$과 $NK_2$ 수용체 차단제인 FK224를 이용하여 기도내 신경성 염증에서 혈장유출에 대한 효과를 기도 부위별로 확인하였다. 대상 및 방법: 백서 21마리를 7마리씩 3군으로 나누어 미주신경에 전기적 자극을 하지 않은 대조군(control group), 2분간 자극한 군(NANC2군)과 신경 단백 수용체 차단제인 FK224를 미주신경 자극 전에 사용한 군(FK224군)에서 Evans blue dye를 이용하여 기도 부위별 혈장 유출의 정도를 각 군간에 비교하여 다음과 같은 결과를 얻었다. 결과: 1) 2분간 신경 자극한 군(NANC2군)은 대조군에 비하여 기관에서 49.7(${\pm}2.5$)ng/mg으로 353%, 주기관지에서 38.7(${\pm}2.8$)ng/mg으로 221%의 증가와 말초기관지 19.1(${\pm}1.6$)ng/mg으로 151%로 혈장 유출이 모두 유의하게 높았으며(p<0.05), 주로 상부 기도에서 혈장 유출 정도가 심하였으나, 폐실질은 13.0(${\pm}1.8$)ng/mg, 76%로 대조군과 차이는 없었다(p>0.05). 2) 신경 단백질 수용체 차단제를 사용한 FK224군은 2분간 신경 자극한 군에 비하여 기관에서 24.3(${\pm}2.2$)ng/mg으로 49%, 주기관지에서 22.3(${\pm}1.6$)ng/mg 으로 58%의 억제와 말초기관지 13.3(${\pm}0.8$) ng/mg으로 70%로 혈장 유출이 모두 유의하게 감소되었다(p<0.05). 결론: 이상의 결과에 의하면 백서에서 미주신경(NANC)의 전기적 자극으로 유발된 혈장유출은 기도에서만 발생되고 주로 상부기도에서 혈장유출이 심하며, $NK_1$과 $NK_2$ 수용체 차단제인 FK224를 전처치하여 substance P와 neurokinin A의 수용체 차단으로 기도 혈장 유출이 억제됨을 알 수 있었다.

• 대한한방부인과학회지
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• 제22권1호
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• pp.41-52
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• 2009

Purpose: This study was designed to investigate the anti-tumor metastasis by immunomodulating effects of extracts of Prunellae Spica. Methods: Antimetastatic experiment was conducted in vivo by using colon 26-M3.1 carcinoma. And we observed cytotoxicity of Prunellae Spica on colon 26-M3.1 carcinoma, L5178Y-R lymphoma cell, hela cell and macrophage. To observe the immnomodulating effects of Prunellae Spica, we estimated IL-6, IL-10, IL-12, TNF-${\alpha}$ from peritoneal macrophages. And we evaluated the activation of NK cell by using anti-asialo-GM1 serum. Results: We found that the administration of Prunellae Spica extracts significantly inhibited tumor metastasis in vivo. In an in vitro cytotoxicity analysis, cell growth are closer to 100% in case of colon 26-M3.1 carcinoma, L5178Y-R lymphoma cell, hela cell at low concentration. In case of macrophage, cell proliferation is closer to 100% less than $62.5{\mu}g/m{\ell}$ of Prunellae Spica extracts. The level of cytokine such as IL-6, IL-10, IL-12 which stimulates Prunellae Spica extracts was increased in dose-dependent manner compared to the control group. TNF-${\alpha}$ is hardly secreted less than $250{\mu}g/m{\ell}$ The depletion of NK cells by anti-asialo GM1 serum partly abolished the inhibitory effect of Prunellae Spica on tumor metastasis. Conclusion: Prunellae Spica appears to have considerable activity on the anti-metastasis by activation the immune system such as macrophage and NK cell.

• Journal of Periodontal and Implant Science
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• 제22권2호
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• pp.207.2-207.2
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• 1992

• Journal of Microbiology and Biotechnology
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• 제30권3호
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• pp.439-447
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• 2020

We investigated the immune restoration activity of Undaria pinnatifida fucoidan-rich extract in cyclophosphamide-induced immunosuppressed mice. C57BL/6 mice were intraperitoneally injected with 80 mg/kg of cyclophosphamide (CP) and orally administered with either drinking water (DW), red ginseng extract (RG), or one of three different doses of Undaria pinnatifida fucoidan-rich extract (DSU02 50, 100, and 150 mg/kg). After 14 days, liver, spleen, and whole blood were isolated from each animal. The frequencies of NK and CD³⁺, CD⁴⁺, and CD⁸⁺ T cells were significantly increased in splenocytes isolated from the DSU02 100 mg/kg and DSU02 150 mg/kg groups (NK1.1+, 5.4% or 4.9% vs 3.8%; CD³⁺, 39.3% or 37.9% vs 32.3%; CD4+, 22% or 20.2% vs 17.4%; CD8+, 12.7% or 11.6% vs 10.1%). NK cytotoxicity was enhanced in the DSU02-fed groups at all doses (CP-treated DW, 93.4%; RG, 107.2%; DSU02 50, 107.3%; DSU02 100, 107.3%; DSU02 150, 107.1%), and the proliferation of T cells (CD³⁺, CD⁴⁺, and CD⁸⁺) was also greater in the DSU02 100 mg/kg and DSU02 150 mg/kg administered groups compared with the unfed group. Plasma concentrations of TNF-α, IgM, and total IgG from the DSU02 150 mg/kg group were also significantly higher compared with the other groups (TNF-α: CP-treated DW - 21.5 pg/ml, DSU02 150 - 47.1 pg/ml; IgM: CP-treated DW - 82.9 ng/ml, DSU02 150 - 110.8 ng/ml; total IgG: CP-treated DW - 114.4 ng/ml, DSU02 150 - 162.7 ng/ml). We suggest that Undaria pinnatifida fucoidan-rich extract could be a promising candidate for a marine natural immune stimulator.

• Asian Pacific Journal of Cancer Prevention
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• 제15권22호
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• pp.9587-9592
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• 2014

Nausea and vomiting are common adverse events in chemotherapy. In spite of the serious effects on the quality of life and further treatment, they remain overlooked by physicians, and no standard treatment has been developed. Neurokinin-1 (NK-1) receptor antagonists and palonosetron are the major agents in the standard regimen for treating moderately and highly emetogenic chemotherapy-induced nausea and vomiting (CINV). However, NK-1 receptor antagonists first became commercially available at the end of 2013 and palonosetron has not been extensively applied in China. Olanzapine was recommended as a therapy for moderate and severe CINV in antiemesis-clinical practice guidelines in oncology in 2014 for the first time. It is an atypical antipsychotic agent, which can block multiple receptors on neurotransmitters. During more than 10 years, olanzapine has demonstrated significant effects in preventing CINV and treating breakthrough and refractor CINV, which was observed in case reports, precise retrospective studies, and phase I, II and III clinical trials, with no grade 3 to 4 adverse events. In particular, it is superior to aprepitant and dexamethasone in delayed nausea and vomiting. Therefore, this compound is worthy of further investigation.

• IMMUNE NETWORK
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• 제22권3호
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• pp.27.1-27.13
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• 2022

Little is known of the lung cellular immunophenotypes in patients with non-tuberculous mycobacterial lung disease (NTM-LD). Flow-cytometric analyses for the major myeloid and lymphoid cell subsets were performed in less- and more-diseased areas of surgically resected lungs from six patients with NTM-LD and two with Pseudomonas aeruginosa lung disease (PsA-LD). Lymphocytes, comprised mainly of NK cells, CD4⁺ and CD8⁺ T cells, and B cells, accounted for ~60% of all leukocytes, with greater prevalence of T and B cells in more-diseased areas. In contrast, fewer neutrophils were found with decreased number in more-diseased areas. Compared to NTM-LD, lung tissues from patients with PsA-LD demonstrated relatively lower numbers of T and B lymphocytes but similar numbers of NK cells. While this study demonstrated a large influx of lymphocytes into the lungs of patients with chronic NTM-LD, further analyses of their phenotypes are necessary to determine the significance of these findings.

• Archives of Pharmacal Research
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• 제22권3호
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• pp.255-261
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• 1999

The effect of biphenyl dimethyl dicarboxylate (PMC) on the cellular and nonspecific immunosuppressions by ketoconazole (KCZ) was investigated in ICR mice. PMC at a dose of 6 mg/kg was administered orally to mice daily for 14 consecutive days. KCZ was suspended in RPMI 1640 medium and orally administered at 160 mg/kg/day 2 hrs after the administration of PMC. Immune responses of the delayed-type hypersensitively (DTH) reaction to sheep red blood cells (SRBC), phagocytic activity and natural killer (NK) cell activity were evaluated. DTH reaction to SRBC was enhanced to normal level by the combination of PMC and KCZ, as compared with treatment of KCZ alone. In the combination of PMC and KCZ, as compared with treatment of KCZ alone, there were also significant increases in activities of natural killer (NK) cells and phagocytes along with circulating leukocytes. These findings indicate that PMC shows a significant restoration from the immunotoixc status induced by KCZ.

• 생명과학회지
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• 제20권6호
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• pp.811-818
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• 2010

Sphingomnas paucibilis NK2000 균주를 사용한 젤란의 최적 교반속도 및 통기량은 각각 400 rpm 및 1.0 vvm이었다. 이 균주를 사용하여 젤란의 생산성을 향상시키기 위한 포도당의 최적 첨가시기는 배양을 시작한 36시간이었다. 젤란의 생산성을 향상시키기 위한 5가지 방법, 1) 포도당을 첨가하지 않는 방법, 2) 배양 36시간 후에 포도당을 첨가하지만 교반속도 및 통기량을 변화시키지 않는 방법, 3) 배양 36 시간 후에 포도당을 첨가하고 교반속도를 400 rpm에서 600 rpm으로 변화시키는 방법, 4) 배양 36 시간 후에 포도당을 첨가하고 교반속도를 400 rpm에서 600 rpm으로 증가시키고 통기량을 1.0 vvm에서 1.5 vvm으로 증가시키는 방법 및 5) 배양 36 시간 후에 포도당을 첨가하고 교반속도를 400 rpm에서 600 rpm으로 증가시키고 통기량을 1.0 vvm에서 2.0 vvm으로 증가시키는 방법 등을 실험한 결과, 젤란의 생산성은 각각 5.19, 5.74, 6.73, 7.93, 및 9.40 g/l이었으며, 변환률은 각각 26.0, 19.1, 22.4, 26.4, and 31.3%이었다. 최적의 방법으로 생산한 젤란의 생산농도 및 포도당 전환율은 포도당을 첨가하지 않은 방법으로 생산한 젤란의 생산농도 및 포도당 전환율에 비하여 각각 1.81 및 1.20 배 증가하였다.