• Journal of Periodontal and Implant Science
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• 제26권1호
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• pp.188-201
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• 1996

One of the initial events required for periodontal regeneration is the attachment, spreading and proliferation of fibroblasts at the healing sites. These have been reported that minocycline stimulates the attachment of gingival fibroblasts and periodontal ligament cells and $TGF-{\beta}1$ enhances the proliferation of periodontal ligament cells. The purpose of this study was to evaluate and confirm the effect of minocycline and $TGF-{\beta}1$ on human gingival fibroblasts and periodontal ligament cells. That gingival fibroblasts and periodontal ligament cells used in this study were obtained from the explants of healthy periodontal ligaments and gingival tissues of extracted 3rd molars or premolar teeth extracted from the patients with orthodontic treatment. The cells were cultured in ${\alpha}-MEM$(minimal essential medium) supplemented with antibiotics and FBS(fetal bovine serum) at $37^{\circ}C$ in a humidified atmosphere of 5% carbon dioxide-95% air. Cells were used between the 5th to 8th passage in this study. The attachment and activity of both cells were evaluated by MTT assay. The results were as follows: 1. Maximum gingival fibroblast attachment was seen at a $50{\mu}g/ml$ dose of minocycline, while maximum periodontal ligament cell attachment was seen at a $100{\mu}g/ml$, and exposure of both cells to minocycline above maximal attachment dose results in a decline from maximum attachment. 2. The activity values of both cells tested minocycline were below to the control activity values at all concentrations. 3. The attachment values of both cells tested $TGF-{\beta}1$ were below or similar to control attachment values. On the above the findings, minocycline stimulated the cell attachment of gingival fibroblasts and periodontal ligament cells and $TGF-{\beta}1$ enhances the cell activity of periodontal ligament cells.

• 한국식품영양과학회지
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• 제29권4호
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• pp.629-634
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• 2000

저 염 세우젓을 제조하기 위하여 식염농도를 각각 10%, 15% 및 20%로 조절한 새우젓에 감마 선을 조사한 후 15$^{\circ}C$에서 발효시키면서 아미노태 질소, 휘발성 염기태 질소, trimethylamine 및 단백질분해효소의 할성변화를 조사하였다. 감마선 조사직후 아미노태 질소, 휘발성 염기 태 질소, trimethylamine 함량 및 단백질 분해효소 활성은 감마선 조사에 의해 영향을 받지 않는 것으로 나타났다. 발효기간 동안 아미노태 질소, 휘발성 염기태 질소 및 trimethylamine 함량은 증가하였으나, 효소활성은 발효 4~5주까지 계속 증가하다가 점차 감소하는 경향을 보였다. 특히 15% 식염첨가와 10kGy의 감마선 조사 및 20% 식염첨가와 5~7.5kGy 이상의 감마선 조사를 병용처리한 새우젓의 경우, 30% 식염성 염기태 질소, trimethylamine 함량 및 단백질분해효소 활성이 비슷한 수준으로 발혀기간 동안 적정 수준 의 함량 및 활성을 나타내었다.

• 한국발생생물학회지:발생과생식
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• 제23권3호
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• pp.255-262
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• 2019

Previously, we reported negative effects of low-dose nonylphenol (NP) exposure on the reproductive organs of F1 male mice. In the present study was further investigated the endocrine disrupting effect of NP exposure to F2 generation male mice. Mice were divided into 2 groups; (1) CON, control animals and (2) NP-50 ($50{\mu}g/L$), animals were treated with NP via drinking water. NP exposures were continuously conducted from parental pre-mating period until the postnatal day (PND) 55 of F2 offsprings. Mice were sacrificed on PND 55 and the reproductive tissue weights were measured. The initial (at PND 21) and terminal (PND 55) body weights of the NP-50 group animals were not significantly different from those of control group animals. NP exposure fail to induce a significant weight change of the testes, seminal vesicle and prostate except absolute epididymal weight (p<0.05). However, pathohistological studies revealed that NP-treated F2 animals showed evident decrease in seminiferous tubule diameters, reduced luminal area and number of germ cells. Also, sloughing morphologies in the tubules were notable. In the caudal epididymis, fewer mature sperms and swollen epithelial cells were found in the NP-treated group. The present study demonstrated that the subchronic low-dose NP exposure induced pathohistological abnormalities in testis and epididymis of F2 mice, and we assumed that these 'qualitative' changes in reproductive tissues could be derived from the epigenetic modifications such as DNA methylation, histone modification, altered DNA accessibility and chromatin structure. Further studies are needed to achieve a better understanding on the multi- or trans-generational effects of NP on the reproductive health and a human application.

• Clinical and Experimental Pediatrics
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• 제46권5호
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• pp.500-504
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• 2003

목 적: 소아의 가와사끼병에서 급성기 항염치료는 고용량의 IVIG와 경구용 아스피린의 병합투여가 일반적으로 사용되고 있다. 이러한 초기 항염치료에 반응을 보이지 않은 경우에는 IVIG의 추가투여나 스테로이드가 사용될 수 있으며 발열기간과 입원기간이 길어질 수 있다. 관련인자로서 환자의 나이, 성별, 발열-치료 간격과 백혈구수, CRP 등이 연관될 수 있다는 보고가 있었다. 저자들은 이러한 초기 치료실패에 임상적 또는 검사소견상의 관련인자가 있는가를 알아보기 위해 본 연구를 시행하였다. 방 법 : 1997년 6월부터 2002년 6월까지 만 5년간 원광대학교병원 소아과에서 가와사끼병으로 입원하여 치료받았던 177명의 환자를 대상으로 후향적으로 조사하였다. 1회의 투여로 반응을 보이지 않은 군(A군, n=19)과 반응을 보였던 대조군(B군, n=158)에서 나이와 성별, 발열에서 입원까지의 기간(hr)을 비교하였다. 입원 당시와 발병 6주째에 백혈구수와 혈소판, ESR, CRP, AST/ALT, ASO치, 소변검사, 관상동맥 심초음파 검사를 시행하여 비교하였다. 통계적 비교는 chi-square와 t-test를 이용하였다. 결 과 : 초기치료에 반응하지 않은 환아는 177례 중 19례(10.7%)였다. 나이와 성별, 백혈구수, 농뇨, 관상동맥의 이상에서는 두 군간에 유의한 차이가 없었다. 재치료군에서는 발열-입원 기간(hr)이 유의하게 짧았으며(P=0.041), AST/ALT치의 동반 상승(P=0.011), ASO치의 상승(P=0.000)이 관찰되었다. 결 론 : 백혈구수와 ESR, CRP의 증가나 AST, ALT가 따로 상승한 경우, 농뇨의 존재 여부에서는 재치료율과 관계가 없었다. 반면에, 발열-입원 기간이 짧았던 경우와 AST/ALT의 동시상승, ASO치 상승군에서 재치료율이 유의하게 높았다. 향후, AST/ALT치와 ASO치의 관련성에 대한 추가적인 연구가 더 필요할 것으로 사료된다.

• 한국식품과학회지
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• 제49권2호
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• pp.117-122
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• 2017

신선 채소인 파프리카에 검역처리 선량의 전자선 처리(0, 0.4, 1, 2 kGy) 후 냉장저장 40일 동안 미생물학적, 이화학적 및 관능적 품질을 평가하였다. 파프리카의 미생물 농도는 총세균, 효모 및 곰팡이의 경우 $10^4CFU/g$, 대장균군은 $10^2CFU/g$ 수준이었고, 1 kGy 선량은 미생물 농도를 1 log cycle 감소시킬 수 있었다. 중량감소율은 조사처리에 따른 차이를 보이지 않았고, 경도와 카로티노이드 함량은 조사 직후 1 kGy 이상의 선량에서 유의적으로 감소하였으며, 저장 중에도 선량에 관계없이 감소하였다. 비타민 C 함량은 선량에 따른 유의적인 차이를 보이지 않았고, 0, 0.4 및 1 kGy 처리 시료는 저장 40일째 저장 초기 함량의 87-90% 수준으로 감소하였다. 파프리카에 대한 관능평가 결과, 2 kGy 수준의 전자선 처리는 색과 조직감 저하에 영향을 미치는 것으로 확인되었다. 이상의 결과, 수출용 파프리카의 해충구제 및 검역처리를 위한 0.4-1 kGy 수준의 전자선 처리는 냉장저장 동안 미생물학적 안전성을 확보하면서 이화학적 품질을 유지시키는 것으로 확인되었다.

• Korean Journal of Radiology
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• 제25권3호
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• pp.257-266
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• 2024

Objective: To investigate molecular and functional consequences of additional exposures to iodine- or gadolinium-based contrast agents within 24 hours from the initial intravenous administration of iodine-based contrast agents through an animal study. Materials and Methods: Fifty-six Sprague-Dawley male rats were equally divided into eight groups: negative control, positive control (PC) with single-dose administration of CT contrast agent, and additional administration of either CT or MR contrast agents 2, 4, or 24 hours from initial CT contrast agent injection. A 12 µL/g of iodinated contrast agent or a 0.47 µL/g of gadolinium-based contrast agent were injected into the tail vein. Serum levels of blood urea nitrogen, creatinine, cystatin C (Cys C), and malondialdehyde (MDA) were measured. mRNA and protein levels of kidney injury molecule-1 (KIM-1) and neutrophil gelatinase-associated lipocalin (NGAL) were evaluated. Results: Levels of serum creatinine (SCr) were significantly higher in repeated CT contrast agent injection groups than in PC (0.21 ± 0.02 mg/dL for PC; 0.40 ± 0.02, 0.34 ± 0.03, and 0.41 ± 0.10 mg/dL for 2-, 4-, and 24-hour interval groups, respectively; P < 0.001). There was no significant difference in the average Cys C and MDA levels between PC and repeated CT contrast agent injection groups (Cys C, P = 0.256-0.362; MDA, P > 0.99). Additional doses of MR contrast agent did not make significant changes compared to PC in SCr (P > 0.99), Cys C (P = 0.262), and MDA (P = 0.139-0.771) levels. mRNA and protein levels of KIM-1 and NGAL were not significantly different among additional CT or MR contrast agent groups (P > 0.05). Conclusion: A sufficient time interval, probably more than 24 hours, between repeated contrast-enhanced CT examinations may be necessary to avoid deterioration in renal function. However, conducting contrast-enhanced MRI on the same day as contrast-enhanced CT may not induce clinically significant kidney injury.

• The Korean Journal of Pain
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• 제6권1호
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• pp.32-39
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• 1993

전북대학교 병원에 입원하여 하복부 수술을 받는 미국 마취과학회 전신상태 분류상 class I, II인 환자 40명을 대상으로 수술후 morphine(1군)과 ketorolac(2군)을 지속적으로 정주한 결과 다음과 같은 결론을 얻었다. 1) 1군과 2군 모두 수술후 통증에 의의 있는 감소를 보였으며 군 간의 차이는 없었다. 2) 1군에서 2군보다 부작용의 빈도가 많았다. 이상의 결과로 수술후 통증 관리에 있어서 morphine과 ketorolac의 지속적 정맥 주입 방법은 모두 효과적이었으며, ketorolac이 morphine보다 부작용의 발현 빈도가 더 적은것으로 보아 morphine을 대신할 수 있는 유용한 약물로 사료된다.

• 대한환경공학회지
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• 제32권7호
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• pp.722-729
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• 2010

하수 재이용에 대한 관심이 급부상하고 있는 가운데, 재이용수의 미량물질 등에 의한 화학적 리스크와 더불어 미생물학적 안전성에 대한 고려가 요구되고 있다. 본 연구에서는 벤치스케일의 연속식 실험장치를 이용, 미량물질 중 최근 주목을 받고 있는 의약품류를 대상으로, UV처리공정의 의약품류 제거효과 및 미생물학적 안전성의 달성 가능성을 고찰하였다. 시험수로 이용한 하수 2차 처리수중에서는 항생물질, 해열진통제 등 38종의 의약품류가 수 ng/L에서 수백 ng/L의 범위로 검출되었으며, 이를 대상으로 하여 UV 및 UV/$H_2O_2$ 처리실험을 행한 결과, UV 단독처리에 의한 의약품류의 효과적인 제거에는 상당량의 UV조사량이 필요할 것으로 예상되었다. 반면, UV/$H_2O_2$ 공정의 경우 $H_2O_2$의 첨가농도를 약 1 mg/L에서 6mg/L까지 증가시킴에 따라 각 의약품류의 제거율은 점점 증가하는 것으로 나타났다. 한편, $923\;mJ/cm^2$의 UV 조사량과 6.2 mg/L의 $H_2O_2$를 병용한 UV/$H_2O_2$ 처리는 Naproxen(>89%)외 모든 의약품류의 농도를 90% 이상까지 감소시킬 수 있었다. 또한 이 운전조건은 현행 하수처리장 유출수중의 대장균군에 대한 규제농도($3,000/cm^3$)를 기준으로 하였을 때, 4~5 log의 불활성화를 달성할 수 있을 것으로 예상되어, 하수 재이용에 요구되는 California Title 22의 criteria를 만족시킬 수 있을 것으로 판단되었다.

• Asian Journal of Atmospheric Environment
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• 제4권2호
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• pp.63-71
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• 2010

The removal characteristics for aromatic and aliphatic VOCs by electron beam (EB) were discussed in terms of several removal variables such as initial VOC concentration, absorbed dose, background gas, moisture content, reactor material and inlet temperature. It was reviewed that only reactor material was an independent variable among the potential control factors concerned. It was also suggested that main mechanism by EB should be radical reaction for the VOC removal rather than that by primary electrons. It was discussed that the removal efficiency of benzene was lower than that of hexane due to a closed benzene ring. In the case of aromatic VOCs, it was observed that the decomposition of the VOCs with more functional groups attached on the benzene ring was much easier than those with less ones. As for aliphatic VOCs, it was also implied that the longer carbon chain was, the higher the removal efficiency became. An EB-catalyst hybrid system was discussed as an alternative way to remove VOCs more effectively than EB-only system due to much less by-products. This hybrid included supporting materials such as cordierite, Y-zeolite, and $\gamma$-alumina.

• Nutrition Research and Practice
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• 제1권4호
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• pp.298-304
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• 2007

This study was conducted to investigate the hypocholesterolemic effect of simvastatin (30 mg/kg BW) and antioxidant effect of coenzyme Q10 (CoQ10, 15 mg/kg BW) or green tea (5%) on erythrocyte Na leak, platelet aggregation and TBARS production in hypercholesterolemic rats treated with statin. Food efficiency ratio (FER, ADG/ADFI) was decreased in statin group and increased in green tea group, and the difference between these two groups was significant (p<0.05). Plasma total cholesterol was somewhat increased in all groups with statin compared with control. Plasma triglyceride was decreased in statin group and increased in groups of CoQ10 and green tea, and the difference between groups of statin and green tea was significant (p<0.05). Liver total cholesterol was not different between the control and statin group, but was significantly decreased in the group with green tea compared with other groups (p<0.05). Liver triglyceride was decreased in groups of statin and green tea compared with the control, and the difference between groups of the control and green tea was significant (p<0.05). Platelet aggregation of both the initial slope and the maximum was not significantly different, but the group with green tea tended to be higher in initial slope and lower in the maximum. Intracellular Na of group with green tea was significantly higher than the control or statin group (p<0.05). Na leak in intact cells was significantly decreased in the statin group compared with the control (p<0.05). Na leak in AAPH treated cells was also significantly reduced in the statin group compared with groups of the control and CoQ10 (p<0.05). TBARS production in platelet rich plasma was significantly decreased in the groups with CoQ10 and green tea compared with the control and statin groups (p<0.05). TBARS of liver was significantly decreased in the group with green tea compared with the statin group (p<0.05). In the present study, even a high dose of statin did not show a cholesterol lowering effect, therefore depletion of CoQ10 following statin treatment in rats is not clear. More clinical studies are needed for therapeutic use of CoQ10 as an antioxidant in prevention of degenerative diseases independent of statin therapy.