• 한국식품영양학회지
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• 제25권2호
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• pp.233-238
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• 2012

본 연구에서는 신생아 질환과 사망 원인 중 첫 번째에 해당하는 설사의 주된 원인균인 C. jejuni와 기타 장내 염증 유발 유해 세균에 대한 쇠비름 추출물의 항균력을 검증하였다. 과거부터 민간이나 한방에서 널리 사용되어져 온 쇠비름은 각종 항균 효과나 항염증, 항암 효과 등이 있는 것으로 알려져 있다. 쇠비름을 각종 유기용매와 열수로 추출하여 Salmonella typhimirium, Salmonella enteriditis, Shigella dysenteriae, Shigella flexneri, Shigella sonnei 및 C. jejuni에 대한 항균활성을 조사해 본 바, 쇠비름의 ethylacetate 추출물 및 열수 추출물이 이들에 대한 항균력을 나타내었다. 쇠비름의 ethylacetate 추출물이 10 $mg/m{\ell}$ 농도에서 Salmonella typhimurium에 대해 가장 높은 항균력을 나타내었고, 열수 추출물도 유사한 항균성을 나타내었다. C. jejuni에 대한 쇠비름 열수 추출물의 MIC 범위는 10~20 $mg/m{\ell}$였으며, $MIC_{50}$은 10 $mg/m{\ell}$, $MIC_{90}$은 20 $mg/m{\ell}$이었다. 쇠비름 열수 추출물은 10 $mg/m{\ell}$ 이상의 농도에서 C. jejuni에 대한 강한 항균력을 나타내 보였다. 또한 액체 배지에 배양한 C. jejuni에 대해 쇠비름의 열수 추출물이 10~20 $mg/m{\ell}$ 농도에서 36시간까지 성장 억제 효과를 보였다.

• 한국해양바이오학회지
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• 제2권2호
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• pp.113-119
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• 2007

본 실험은 홍조 해조류의 하나인 우뭇가사리를 추출, 각 용매별로 분획하여 항균효과와 암세포 성장억제 및 QR 유도활성 효과 등의 생리활성을 연구하였다. 우뭇가사리의 각 분획물 GAMM, GAMH, GAMB 및 GAMA층을 단백질 식품 부패 원인균인 Serratia marcescens, Proteus mirabilis의 2종과 감염형 세균성 식중독 원인균인 Salmonella enteritidis, 부패균인 Bacillus subtilis, 식중독 원인균인 Starpylococcus aureus 등 총 5 가지 균종에 처리하여 항균력을 조사한 결과 GAMM층에서 높은 가장 높은 항균 활성 효과를 나타내었다. 또 4종의 인체 암세포주 HT-29, HepG2, MCF-7 및 B16F-10 세포주에 대한 암세포 증식 억제 실험을 한 결과 사용한 4종의 모든 암세포주에서 methanol 분획층인 GAMM에서 낮은 농도의 시료첨가에도 불구하고 괄목할 만한 높은 암세포 성장 억제효과를 나타내었다. 한편, 사용한 4가지 암세포주중 유일하게 quinone reductase를 가지고 있는 HepG2를 이용한 암예 방지표인 quinone reductase 효소 유도 활성 여부를 측정한 결과 분획물 첨가농도를 10, 20, 30 및 $40{\mu}g/mL$로 첨가하였을 때 GAMM의 첨가농도 $20{\mu}g/mL$에서 대조군에 비해 약 2배 이상의 높은 QR유도효과를 나타내었고 최종농도 $40{\mu}g/mL$에서는 2.5배의 암예방 QR 유도효과를 나타내었다.

• 한국식품과학회지
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• 제35권5호
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• pp.893-897
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• 2003

천연물로부터 추출한 8가지 sample에 대하여 항균성의 효능이 있는 것을 탐색하여 의약연구의 기초자료 및 현대인의 기호에 맞는 기능성 식품 개발을 목적으로 하였다. 본 연구에서 항균활성 실험에서 6mm paper disc에 대한 공시 균주에 대한 오미자와 매실은 모든 사용한 균주에 대해 6-10 mm였으며, 대추와 구기자는 1mm 정도였고 솔잎 등은 거의 보이지 않거나 0.5 mm 정도 clear zone이 생성되었다. 1차screening test에서 항균력을 보인 B. subtilis, E. coli KCCM 11591, P. aeruginosa KCTC 1750, C. albicans 균주의 성장억제도는 사용균주 농도를 희석하여 S. chinenis H-20에 대한 농도의 의존성을 10cm petri dish에서 control과 비교할 때 $50\;{\mu}L$는 5배 정도 저해하였으며, $75\;{\mu}L$에는 완전 저해효능이 있었다. 배양초기와 배양5시간에 S. chinenis H-20를 $75\;{\mu}L$ 첨가한 것에 대한 항균력은 변화가 없었다. 즉 S. chinenis H-20은 유전정보전달을 저해하는 항생물질이 작용하는 것으로 추측할 수 있다. S. chinenis H-20을 배양 5시간에 첨가하여 control과 비교하였을 때 B. subtilis, S. aureus, E. coli를 완전히 저해하였다. 매실과 오미자를 첨가한 고추장의 관능평가를 볼 때 전체평가에서 찹쌀고추장이 3.39로 '보통'으로 나타났으며, 매실고추상은 4.29로 약간 '좋다'로 오미자고추장은 2.43으로 '약간 나쁘다'로 나타났다. 찹쌀고추장을 대조군으로 할 때 매실 고추장의 견고성은 4.45배, 오미자고추장은 1.78배 높았다.

• Fisheries and Aquatic Sciences
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• 제21권2호
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• pp.6.1-6.10
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• 2018

The intention of this study was to identify the bacterial pathogens infecting Oreochromis niloticus (Nile tilapia) and Clarias gariepinus (African catfish), and to establish the antibiotic susceptibility of fish bacteria in Uganda. A total of 288 fish samples from 40 fish farms (ponds, cages, and tanks) and 8 wild water sites were aseptically collected and bacteria isolated from the head kidney, liver, brain and spleen. The isolates were identified by their morphological characteristics, conventional biochemical tests and Analytical Profile Index test kits. Antibiotic susceptibility of selected bacteria was determined by the Kirby-Bauer disc diffusion method. The following well-known fish pathogens were identified at a farm prevalence of; Aeromonas hydrophila (43.8%), Aeromonas sobria (20.8%), Edwardsiella tarda (8.3%), Flavobacterium spp. (4.2%) and Streptococcus spp. (6.3%). Other bacteria with varying significance as fish pathogens were also identified including Plesiomonas shigelloides (25.0%), Chryseobacterium indoligenes (12.5%), Pseudomonas fluorescens (10.4%), Pseudomonas aeruginosa (4.2%), Pseudomonas stutzeri (2.1%), Vibrio cholerae (10.4%), Proteus spp. (6.3%), Citrobacter spp. (4.2%), Klebsiella spp. (4.2%) Serratia marcescens (4.2%), Burkholderia cepacia (2.1%), Comamonas testosteroni (8.3%) and Ralstonia picketti (2.1%). Aeromonas spp., Edwardsiella tarda and Streptococcus spp. were commonly isolated from diseased fish. Aeromonas spp. (n = 82) and Plesiomonas shigelloides (n = 73) were evaluated for antibiotic susceptibility. All isolates tested were susceptible to at-least ten (10) of the fourteen antibiotics evaluated. High levels of resistance were however expressed by all isolates to penicillin, oxacillin and ampicillin. This observed resistance is most probably intrinsic to those bacteria, suggesting minimal levels of acquired antibiotic resistance in fish bacteria from the study area. To our knowledge, this is the first study to establish the occurrence of several bacteria species infecting fish; and to determine antibiotic susceptibility of fish bacteria in Uganda. The current study provides baseline information for future reference and fish disease management in the country.

• KSBB Journal
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• 제17권6호
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• pp.537-542
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• 2002

50가지 생약재를 95% 에탄올과 물추출하여 식중독 세균인 S. aureus와 E. coli O157:H7에 대한 항균활성을 조사하였다. 한천배지확산법에 따른 생육저해효과를 측한 결과, S. aureus 에 대하여 우슬>목단피>지실>황백, 건강, 민들레 순으로, E. coli O157:H7에 대하여 목단피＞우슬>건강>지실, 황백 순으로 활성을 나타내었다. MIC는 S. aureus에 대하여 우슬이 156.25 $\mu$g/mL, 목단피와 황백이 625 $\mu$g/mL로 나타났으며, E. coli O157:H7에 대하여 우슬과 목단피의 MIC는 각각 625, 312.5 $\mu$g/mL로 높은 항균력을 나타내었다. 가장 높은 활성을 보인 우슬과 목단피를 용매분획(hexane, CHC1$_3$, ethyl acetate, butanol)하여 한천배지 확산법에 의한 두 균에 대한 생장저해 효과를 측정하였다. 우슬은 ethyl acetate 분획물에서, 목단피는 CHC1$_3$과 ethyl acetate 분획물에서 각각 높은 활성을 나타내었다.

• Journal of Oral Medicine and Pain
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• 제38권1호
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• pp.77-86
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• 2013

2012년 7월부터 2012년 9월까지 부산대학교치과병원 구강내과에 내원하여 측두하악장애로 진단받은 후 행동치료, 약물치료, 물리치료, 교합안정장치 등 보존적 치료를 시행한 환자 137명을 대상으로 초진 시와 치료 3개월 후의 증상 및 임상소견을 비교, 평가하여 다음과 같은 결과를 얻었다. 1. 측두하악장애는 행동치료, 물리치료, 약물치료, 교합안정장치 등의 보존적 치료에 의해 통증, 관절잡음, 개구제한 및 최대편이개구량이 현저히 개선되었다. 2. 보존적 치료에 따른 결과는 성별 및 급, 만성별로 유의한 차이 없이 개선되었다. 3. 측두하악장애의 치료에서 물리치료와 약물치료만 시행한 경우보다 교합안정장치를 병행한 경우에서 임상 증상들의 개선이 현저하였다. 4. 치료 3개월 후 근육장애군은 통증과 개구제한이 유의하게 개선되었고, 관절원판변위군은 통증, 개구제한 및 관절잡음이 유의하게 개선되었다. 골관절염군에서는 통증, 관절잡음, 개구제한 및 최대편이개구량이 모두 개선되었다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제32권1호
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• pp.36-41
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• 2006

Objective. The objective of this study was to examine the hypothesis that inflammatory synovial fluid from TMJ internal derangement initiates a transient increase in intracellular calcium concentration ([$Ca^{2+}$]i) in chondrocytes and the induced Ca2+ signaling affects iNOS/COX-2 gene expression patterns following exposure to inflamed synovial fluid. Materials and Methods. Two female adult patients with symptoms of TMD who agreed to participate in the study were selected for this study. Immortalized human juvenile costal chondrocyte C-28/I2 was grown to 80% confluency and synovial fluids from two patients were added respectively to culture media for 24 hours at the concentration of 100ng/10ml. Confocal laser scanning microscope (CLSM) was used to examine changes of intracellular calcium concentration ([$Ca^{2+}$]i). RT-PCR was performed to identify the expression profile of IL-1${\alpha}$, iNOS, COX-2. Results. Increased [$Ca^{2+}$]i was observed in chondrocytes subjected to inflamed synovial fluid compared to control cultures and in respective cultures exposed to inflamed synovial fluids from each patient, IL-1${\beta}$, COX-2 mRNA were detected. However, in neither case iNOS mRNA was expressed. IL-1${\alpha}$, COX-2, and iNOS mRNA were expressed in control culture. Conclusion. Our results show that immortalized chondrocytes cultured with inflamed synovial fluids from patients diagnosed as disc displacement without reduction and limitation in mouth opening showed increased calcium concentration and expression of COX-2 while inhibiting the production of iNOS, which in turn could adversely affect the chondrocytes in at least short term by hindering physiologic role of NO against inflammatory cascades. These findings suggest that inflamed synovial fluid may differentially regulate the transcriptomes of relevant inflammatory mediators, especially iNOS/COX-2 axis in chondrocytes through adjusting calcium transients.

• 한방재활의학과학회지
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• 제25권2호
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• pp.1-13
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• 2015

Objectives Methicillin-Resistant Staphylococcus aureus (MRSA) is a human pathogen and a major cause of hospital-acquired infections. New antibacterial agents that have not been compromised by bacterial resistance are needed to treat MRSA-related infections. In this study, we investigated the antimicrobial activity ofethanol extract of Haedokgeumhwa-san (HGH) which prescription is composed of korean medicine against MRSA. Methods The antibacterial activity of HGH extract was evaluated against MRSA strains by using the Disc diffusion method, broth microdilution method (minimal inhibitory concentration; MIC), checkerboard dilution test, and time-kill test; its mechanism of action was investigated by bacteriolysis, detergent or ATPase inhibitors. The checkerboard dilution test was used to examined synergistic effect of ampicillin, oxacillin, ciprofloxacin, vancomycin, gentamicin and norfloxacin in combination with HGH ethanol extract. A time-kill assay was performed a survival curve which was obtained by plotting viable colony counts depending on time on bacterial growth. Results The minimum inhibitory concentration (MIC) of ethanol extract (HGH) ranged from 1,000 to $2,000{\mu}g/mL$ against all the tested bacterial strains, respectively. We are able to confirm that HGH extract has potentially strong antibacterial activity. In the checkerboard dilution test, fractional inhibitory concentration index of HGH in combination with antibiotics indicated synergy or partial synergism against S. aureus. A time-kill study showed that the growth of the tested bacteria was considerably inhibited after 8 hr of treatment with the combination of HGH with selected antibiotics. For measurement of cell membrane permeability, HGH $250{\sim}1,000{\mu}g/mL$ along with concentration of Triton X-100 (TX) and Tris-(hydroxymethyl) aminomethane (Tris) were used. In the other hand, N,N-dicyclohexylcarbodimide (DCCD) and Sodium azide ($NaN_3$) was used as an inhibitor of ATPase. TX, Tris, DCCD and $NaN_3$ cooperation against S. aureus showed synergistic action. Accordingly, antimicrobial activity of HGH was affected by cell membrane and inhibitor of ATPase. Conclusions These results suggest that Haedokgeumhwa-san extract has antibacterial activity, and that HGH extract offers a potential as a natural antibiotic against MRSA.

• 대한치과보철학회지
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• 제43권1호
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• pp.1-14
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• 2005

Statement of problem. Among the physical properties of adhesion luting cement, the aspect that requires the most important factor is the degree of solubility and water sorption. Dissolution or an inadequate due to excessive water sorption inside the oral cavity compromises the while concurrently increasing the susceptibility to secondary dental caries. Susceptibility to dissolution and difficulty of removing remnant cement from the gingival sulcus have hindered the use of dental resin cement in the clinical practice, but the improved characteristics of newer generation resin cements have interest in and enabled resin cements to be widely used in adhesion of fixed prosthesis, such as laminate veneers and all-ceramic crowns. Purpose. The purpose of this study is to compare and analyze the degrees of solubility and water sorption of a variety of resin cements widely used for clinical purposes with different curing methods. Material and methods. Self-curing resin cements, $Avanto^{(R)}$, $C&B^{TM}$ CEMENT and Superbond C&B cements comprised group 1, 2 and 3. The dual-curing resin cements $Panavian^{TM}$ F, $Calibra^{(R)}$ and $Variolink^{(R)}$ II were divided into groups 4, 5, and 6, respectively. The investigation was carried out using disc-shaped specimens as specified by ANSI/ADA Specification No. 27. The degree of water sorption, water solubility and lactic acid solubility of each test group was analyzed statistically leading to the following conclusion. Results. The degree of water sorption was shown to increase in the following order : group 6, 5, 4, 2, 1 and 3. There were significant differences between the water sorption of each group. Results of the degree of water solubility were shown to increase in the following order : group 6, 5, 4, 2, 1 and 3. Statistically significant differences were found between each group, with the exception of groups 1 and 3. Finally, the degree of lactic acid solubility was found to increase in the following order : group 6,5,4,2,3 and 1. Significant differences were found between each group. In general dual-curing resin cements displayed substantially lower values than self-curing resin cements with regard to water sorption, water solubility, and lactic acid solubility. Conclusions. From the results of this study, dual-curing resin cements show a significantly lower degree of water sorption and solubility than their self-curing counterparts. Clinically, when selecting resin cements, the product with a lower degree of water sorption and solubility are preferred. The results of this study indicate that the use-of dual-curing resin cements is preferable to self-curing cements.

• Journal of Periodontal and Implant Science
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• 제38권sup2호
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• pp.325-334
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• 2008

Purpose: The carrier used as delivery agent for bone morphogenetic proteins(BMPs) should also act as a scaffold for new bone formation. Moreover, bone formation should be predictable in terms of the volume and shape. This study examined the osteogenic effect of macroporous biphasic calcium phosphate (MBCP) block combined with ePTFE membrane as a carrier for recombinant human bone morphogenetic proteins (rhBMP-2). In addition, the additive effect of ePTFE membrane on bone formation was evaluated. Materials and Methods: Eight-millimeter critical sized calvarial defects were created surgically in 28 male Sprague-Dawley rats. The animals were divided into 2 groups containing 14 animals each. The defects were treated with either rhBMP-2/MBCP block (rhBMP-2/MBCP group) or rhBMP-2/MBCP block/ePTFE membrane (rhBMP-2/MBCP/ePTFE group). A disc-shaped MBCP block (3 mm height and 8 mm diameter) was used as the carrier for the rhBMP-2 and ePTFE membrane was used to cover the rhBMP-2/MBCP block. The histologic and histometric parameters were used to evaluate the defects after 2- or 8-week healing period (7 animals/group/healing interval). Results: The level of bone formation in the defects of both groups was significantly higher at 8 weeks than that at 2 weeks (P < 0.05). The ePTFE membrane has no additional effect compared with the rhBMP-2/MBCP block only. However, at 8 weeks, rhBMP-2/MBCP/ePTFE group showed more even bone formation on the top of the MBCP block than the rhBMP-2/MBCP group. Conclusion: These results suggest that the ePTFE membrane has no additive effect on bone formation when a MBCP block is used as a carrier for rhBMP-2.