• Clinical and Experimental Pediatrics
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• 제52권2호
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• pp.181-186
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• 2009

목적 : 기도 및 폐 간질의 염증은 기관지폐 이형성증의 중요한 기전으로 알려져 있다. 염증매개 물질의 하나인 cysteinyl leukotrienes는 기관지 수축, 점액 분비, 부종을 일으켜 폐에 손상을 준다. 저자들은 기관지폐 이형성증 환자의 추가 치료제로서 montelukast의 안전성 및 효과를 연구하고자 하였다. 방법 : 2007년 3월부터 2008년 1월까지 연세대학교 의과대학 영동세브란스병원 및 신촌세브란스병원 신생아 중환자실에 입원하여 montelukast를 복용한 15명의 기관지폐 이형성증 환자를 montelukast 군으로 지정하였으며 2005년 5월부터 2007년 2월까지 영동세브란스병원 및 신촌세브란스병원 신생아 중환자실에 입원하여 montelukast를 복용하지 않은 15명의 기관지폐 이형성증 환아들을 대조군으로 지정하였다. montelukast는 1 mg/kg/d를 하루에 두번 나누어 구강으로 복용하게 하였으며 평균적으로 12주 동안 복용하였고 기존의 기관지폐 이형성증 치료의 추가 치료제로 사용하였다. 결과 : Montelukast 군은 15명 모두 생존하였으며 특이 이상 반응 없었고 생체징후, 혈액검사 모두 정상 소견 보였으며 montelukast 복용 2주 후부터 ventilator index가 대조군에 비해 유의한 감소를 보였다. 다른 호흡 지표들도 대조군에 비해 더 감소하였으나 통계학적으로 의미는 없었다. 결론 : 본 연구 대상 환아 중에서는 기관지폐 이형성증의 기존치료에 추가로 사용된 montelukast에 특이 이상 반응이 없었으며, 대부분 well-tolerable한 것으로 나타났다. 또한 1 mg/kg/d의 montelukast는 치료 2주째부터 기계적 환기의 기간을 줄여 주어 기관지폐 이형성증의 추가 치료제로써 효과가 있음이 확인되었다. 그러나 montelukast 치료 및 예방의 효과 및 안전성을 확립하기 위해서는 더 많은 수의 환아를 대상으로 대규모의 다기관 무작위 대조 연구가 시행되어야 할 것으로 여겨진다.

• Journal of Hospice and Palliative Care
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• 제18권2호
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• pp.128-135
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• 2015

목적: 2006년부터 가정산소치료 서비스에 대해 보장을 시작함에 따라, 기준에 부합하는 사람들은 가정산소 서비스이용에 대해 20%의 본인부담만을 지출하게 되었다. 이 같은 제도의 도입은 환자의 가정산소치료 서비스에 대한 부담을 경감시키게 됨에 따라 주요 이용자인 만성 폐쇄성 폐질환 환자들에게 긍정적인 효과를 미쳤을 것으로 예상된다. 하지만, 제도 도입 후 가정산소치료 서비스 제도의 효과에 대한 연구가 많지 않았고, 실증적 근거자료 또한 부족한 실정이다. 따라서, 본 연구는 제도 도입 후, 가정산소치료 서비스가 만성 폐쇄성 폐질환 환자들의 상태에 긍정적 영향을 미쳤는지를 알아보고자 한다. 방법: 만성폐쇄성 폐질환으로 2007년부터 2012년까지 병원을 방문한 사람(N=10,798)의 청구데이터를 분석에 이용하였으며, 가정산소치료 서비스 제도 적용의 기준인 호흡기장애등급에 따라 분포의 차이를 설명하기 위해 ${\chi}^2$ test을 하였다. 또한, 가정산소치료 서비스 이용에 대한 요인을 알아보고자 Multiple Logistic Regression Analysis을 하였으며, 가정산소치료 서비스 이용이 호흡기장애등급의 변화에 어떠한 영향을 주었는지 알아보고자 Generalized Linear Mixed Model 분석을 하였다. 결과: 분석대상 중 호흡기장애등급 1등급에 속하는 대상은 2,490명이었으며, 2/3등급에 속하는 대상은 8,308명이었다. 가정산소치료 서비스 이용에 대해서는 호흡기 장애등급 3등급이 1 또는 2등급에 비해 적게 이용하였다(OR: 0.33, 95% CI: 0.30~0.37). 또한, 가정산소치료를 이용함에 따라 환자의 상태의 변화에 대해 분석한 결과, 가정산소치료 이용자는 미이용자에 비해 상태의 완화 또는 유지에 대해 높은 값을 보였다(OR: 1.41, 95% CI: 1.23~1.61). 결론: 가정산소치료 서비스 이용은 만성 폐쇄성 폐질환 환자의 상태 악화방지에 대해서 긍정적인 영향을 준다.

• 동의생리병리학회지
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• 제32권3호
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• pp.157-164
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• 2018

This study was designed to investigate the mechanism of the synergistic anticancer effect of Astragalus membranaceus (AM) and Adenophora triphylla var. japonica (AT) in H1299 human lung carcinoma cells. A combined treatment of ethanol extract of AM (EAM) and AT (EAT) explosively increased the reactive oxygen species (ROS) generation in H1299 cells compared to the single treatment of each of them. Co-treatment of N-acetyl-L-cysteine (NAC) with EAM and EAT markedly enhanced the cell viability and suppressed apoptosis in H1299 cells, suggesting that ROS generation contributed to the anticancer effect of EAM and EAT. Interestingly, the combined treatment of EAM and EAT down-regulated p-AKT in H1299 cells, which was abrogated by NAC treatment. These results clearly indicated that ROS generation mediated the inactivation of AKT. Co-treatment of LY294002 with EAM and EAT significantly reduced the cell viability at a concentration which EAM and EAT didn't show any cytotoxicity. In addition, the recovery of cell viability by co-treatment of NAC with EAM and EAT was quite reversed by LY294002 treatment, which confirmed that the inactivation of AKT played a pivotal role in ROS-mediated apoptosis. Taken together, our results demonstrated that the synergistic anticancer effect of EAM and EAT was mediated by ROS generation and inactivation of AKT. We provide a valuable preclinical data for the development of more effective combination of AM and AT to treat lung cancer.

• Journal of Microbiology and Biotechnology
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• 제16권1호
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• pp.20-24
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• 2006

Plasmid DNA (pDNA) is a product of interest for many biopharmaceutical companies and research laboratories, because of increase in the number of gene therapy protocols that use nonviral vectors. This work was undertaken to study the effect of antibiotic and dissolved oxygen concentration (DOC) on the production of a ColE 1-type plasmid (pVAX1-LacZ) hosted in Escherichia coli $DH5\alpha$ and cultured in a batch fermentor with 0.751 of Terrific Broth. A decrease in the DOC from $60\%\;to\;5\%$ was shown to increase the specific pDNA concentration approximately 1.5-fold, due to the downregulation of growth. Additionally, this increase in the pDNA concentration led to a 2.2-fold increase in the purity of cell lysates obtained after cell lysis. However, the use of higher DOC led to 2.8-fold higher volumetric productivity as a consequence of a faster growth rate, reducing the fermentation time from 24 to 8 h. Interestingly, the specific pDNA concentration, and pDNA productivity and purity were always higher $(10-15\%)$ in the absence of antibiotic. Overall, the data indicate that nonselective conditions can be used without compromising yield, productivity, and purity of pDNA.

• 대한임상검사과학회지
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• 제43권2호
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• pp.82-88
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• 2011

Mandibular advancement devices (MAD) are therapeutic options for obstructive sleep apnea (OSA). The aim of study was to investigate treatment outcomes of before and after insertion of MAD in OSA patients. We retrospectively selected a total of 13 patients who were diagnosed with OSA syndrome. All sleep-related parameters including apnea-hypopnea index (AHI), oxygen desaturation index (ODI), wake after sleep onset (WASO), total arousal were measured by before and after MAD. The use of MAD proves to be efficient in reducing snoring, apnea-hypopne index ($17.2{\pm}14.6$ vs $20.9{\pm}14.6$), WASO ($27.4{\pm}28.8$ vs $47.9{\pm}43.6$), oxygen desaturation index ($9.0{\pm}11.6$ vs $16.4{\pm}11.7$), stage N3 ($54.8{\pm}45.2$ vs $36.6{\pm}22.0$), REM sleep times ($73.3{\pm}19.4$ vs $66.0{\pm}31.0$) and increases sleep efficiency ($92.6{\pm}6.6$ vs $87.2{\pm}11.2$). The decreases in apnea index based on a reduction in the overall and supine AHI values after MAD therapy were significantly greater for the positional OSA than nonpositional OSA patients. The use of MAD proves to be efficient in snoring, WASO, sleep efficiency, reduced AHI and associated with good compliance of patients.

• Journal of Ginseng Research
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• 제42권2호
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• pp.133-143
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• 2018

Background: AD-2 (20(R)-dammarane-3b, 12b, 20, 25-tetrol; 25-OH-PPD) is a ginsenoside and isolated from Panax ginseng, showing anticancer activity against extensive human cancer cell lines. In this study, effects and mechanisms of 1C ((20R)-3b-O-(L-alanyl)-dammarane-12b, 20, 25-triol), a modified version of AD-2, were evaluated for its development as a novel anticancer drug. Methods: MTT assay was performed to evaluate cell cytotoxic activity. Cell cycle and levels of reactive oxygen species (ROS) were determined using flow cytometry analysis. Western blotting was employed to analyze signaling pathways. Results: 1C concentration-dependently reduces prostate cancer cell viability without affecting normal human gastric epithelial cell line-1 viability. In LNCaP prostate cancer cells, 1C triggered apoptosis via Bcl-2 family-mediated mitochondria pathway, downregulated expression of mouse double minute 2, upregulated expression of p53 and stimulated ROS production. ROS scavenger, N-acetylcysteine, can attenuate 1C-induced apoptosis. 1C also inhibited the proliferation of LNCaP cells through inhibition on $Wnt/{\beta}-catenin$ signaling pathway. Conclusion: 1C shows obvious anticancer activity based on inducing cell apoptosis by Bcl-2 family-mediated mitochondria pathway and ROS production, inhibiting $Wnt/{\beta}-catenin$ signaling pathway. These findings demonstrate that 1C may provide leads as a potential agent for cancer therapy.

• 대한한의학회지
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• 제35권2호
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• pp.12-18
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• 2014

Objectives: This was a retrospective case series about the clinical effect of integrated approach with behavior therapy for obstructive sleep apnea (OSA). Methods: Medical records of twelve patients with OSA who were treated with behavior modification including nasal breathing with oral appliances and sleep in lateral position, oral administration of herbal medicines and acupuncture treatment between January and September of 2013 were reviewed. Apnea-hypopnea index (AHI), day time sleepiness, apneas and hypopneas counts during sleep, risk indicator (RI), oxygen desaturation index, average saturation during sleep, lowest desaturation, lowest saturation, snoring events ratio and number of desaturations (%) were assessed before and after treatments with the ApneaLink device, which is a portable diagnostic apparatus for monitoring airflows of the patient's breath at home. Results: After an average 62.67 (SD 37.16) days of treatment, AHI (from 17.67, 12.79 to 8.75, 8.25, p=0.007), RI (from 22.00, 13.26 to 12.09, 8.03, p=0.004), oxygen desaturation index (from 17.33, 12.17 to 8.17, 7.86, p=0.005), and number of desaturations (from 7.00 times, 9.79 to 0.92 times, 1.39, p=0.044) showed significant improvement. Daytime sleepiness improved from 6.5 (3.2) to 3.8 (1.8) but there was no significant difference after treatment (p=0.17). No adverse events related to treatment were observed during participation in the treatment. Conclusion: From this case series, we found that behavior modification with herbal medication and acupuncture may be effective for improving sleep apnea without serious adverse events. Future randomized controlled trials with larger sample size will be necessary for concrete evidence on the benefit of this integrated treatment for OSA.

• Biomolecules & Therapeutics
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• 제25권4호
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• pp.404-410
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• 2017

Benzylideneacetophenone derivative (1E)-1-(4-hydroxy-3-methoxyphenyl) hept-1-en-3-one (JC3) elicited cytotoxic effects on MDA-MB 231 human breast cancer cells-radiation resistant cells (MDA-MB 231-RR), in a dose-dependent manner, with an $IC_{50}$ value of $6{\mu}M$ JC3. JC3-mediated apoptosis was confirmed by increase in sub-G1 cell population. JC3 disrupted the mitochondrial membrane potential, and reduced expression of anti-apoptotic B cell lymphoma-2 protein, whereas it increased expression of pro-apoptotic Bcl-2-associated X protein, leading to the cleavage of caspase-9, caspase-3 and poly (ADP-ribose) polymerase. In addition, JC3 activated mitogen-activated protein kinases, and specific inhibitors of these kinases abrogated the JC3-induced increase in apoptotic bodies. JC3 increased the level of intracellular reactive oxygen species and enhanced oxidative macromolecular damage via lipid peroxidation, protein carbonylation, and DNA strand breakage. Considering these findings, JC3 is an effective therapy against radiation-resistant human breast cancer cells.

• Toxicological Research
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• 제29권1호
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• pp.35-42
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• 2013

Quantum dots (QDs) have received considerable attention due to their potential role in photosensitization during photodynamic therapy. Although QDS are attractive nanomaterials due to their novel and unique physicochemical properties, concerns about their toxicity remain. We suggest a combination strategy, CdSe/ZnS QDs together with curcumin, a natural yellow pigment from turmeric, to reduce QD-induced cytotoxicity. The aim of this study was to explore a potentially effective cancer treatment: co-exposure of HL-60 cells and human normal lymphocytes to CdSe/ZnS QDs and curcumin. Cell viability, apoptosis, reactive oxygen species (ROS) generation, and DNA damage induced by QDs and/or curcumin with or without ultraviolet A (UVA) irradiation were evaluated in both HL-60 cells and normal lymphocytes. In HL-60 cells, cell death, apoptosis, ROS generation, and single/double DNA strand breaks induced by QDs were enhanced by treatment with curcumin and UVA irradiation. The protective effects of curcumin on cell viability, apoptosis, and ROS generation were observed in normal lymphocytes, but not leukemia cells. These results demonstrated that treatment with QD combined with curcumin increased cell death in HL-60 cells, which was mediated by ROS generation. However, curcumin acted as an antioxidant in cultured human normal lymphocytes.

• 대한임상독성학회지
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• 제11권1호
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• pp.41-45
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• 2013

Following are brief statements about the delayed encephalopathy of a patient who recovered without disturbance of consciousness after acute carbon monoxide poisoning. A 72-year-old male was found without consciousness at home and then visited the ER center. Later we learned that the patient was using briquettes as a household heating source. Blood carbon monoxide hemoglobin level was 17.5%. As carbon monoxide poisoning was uncertain after the first interview with the patient, hyperbaric oxygen therapy was not administered at the early stage. After supplying 100% oxygen, the patient recovered consciousness, however, the strength of the lower limb muscle had decreased to class II. The patient showed continued weakening of the lower limb muscle and an increase of CPK; therefore, he was diagnosed as carbon monoxide intoxication and rhabdomyolysis and then admitted to the intensive care unit (ICU) for conservative treatment. During the hospitalization period, continued weakening of the lower limb muscle was observed and he was diagnosed as myopathy after EMG/MCV. However, he suddenly showed altered mentality on the 20th day of hospitalization, and underwent brain MRI. T2 weighted MRI showed typically high signal intensity of both globus pallidus and periventricular white matter; therefore, he was diagnosed as delayed carbon monoxide encephalopathy. This case showed delayed encephalopathy accompanied by rhabdomyolysis and myopathy of a patient who recovered without disturbance of consciousness.