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제주연안 갯녹음(백화) 지역의 해수에 분포하는 세균군의 분자생물학적 분석
강봉조,김미란,윤병준,이동헌,오덕철,강형일 濟州大學校 基礎科學硏究所 2002 基礎科學硏究 Vol.15 No.2
본 연구에서는 갯녹음(백화)현상이 세균생태계와 어떤 관련이 있는지에 대한 기초자료 및 정보를 얻기 위하여 갯녹음 현상이 일어난 제주도 성산과 강정지역 연안의 해수에 존재하는 세균군을 16S rRNA 증폭기법을 이용하여 조사하였다. 강정지역에서는 Alcanivorax, Paracoccus, Damselae, Pseudomonas, Rhodovulum, Silicibacter, Sulfitobacter, Roseobacter 등 다양한 종류의 세균이 분포되어 있었으며, Alcanivorax가 20%의 빈도로 가장 많이 나타났다. 반면, 성산 지역에서는 Pseudomonas속 균주가 우점종으로서 존재하였으며, Pseudomonas tolaasii(혹은 Pseudomonas corrugata)와 유연관계가 가까운 세균은 44%, Pseudomonas mandeli와 가까운 세균이 24%, Verrucomicrobiales와 가까운 세균은 4%, 기타 동정되지 않은 세균은 세 group으로 구분되었으며, 각각 8%, 8%, 12%를 차지하여, 두 곳에 분포되어 있는 세균군상이 상당한 차이점이 있음을 확인하였다. 갯녹음 지역인 강정과 성산 해수의 8월(표품 채집시기)의 수온은 27℃-27.5℃, 염분의 농도는 30.24-30.60%, pH는 8.23-8.36, 용존산소량(DO)은 각각 7.20-7.28로, 두 지역에서 매우 비슷한 것으로 조사된 바 있는데, 이는 수온이나 염분의 농도, 또는 pH보다는 다른 원인에 의하여 두 갯녹음 지역에 분포하는 세균군의 차이를 가져왔음을 제시해 주었다. In this study, the bacterial communities distributed in sea water of the whitening areas of Gangjeong and Seongsan, Jeju-do have been analyzed using the PCR amplification of 16S rRNA to obtain fundamental data and information on relationship of the whitening phenomenon and microbial ecosystem. In Gangjeong, diverse bacteria such as Alcanivorax, Paracoccus, Damselae, Pseudomonas, Rhodovulum, Silicibacier, Sulfitobacter, and Roseobacier have been found, and Alcanivorax was the most abundant clone. The most abundant clone from Seongsan was Pseudoinonas, of which Pseudomonastolaasii and Pseudonionas mandeli were most abundantly occurred in the frequency of approx 44% and 24%, respectively. Approx 4% of the bacterial clones closest to firruconiicrobiales and other unidentified clones were also found in Seongsan, suggesting there is a great discrepancy between bacterial communities from the whitening areas of Seongsan and Gangjeong. The mean tem- perature, chlorine concentration, pH, and dissolved oxygen (DO) of the sea water of Gangjeong and Seongsan in August of 2001 (sampling period) was 27℃-27.5℃, 30.24-30.60%, pH 8.23-8.36,7.20-7.28 ㎎/ℓ, suggesting other environmental factors except for the factors mentioned above might result in difference of bacterial communities distributed in both areas.
한종현,이우진,조성균,이미정,정미란,전정우,김운영,박성혜 동아시아식생활학회 2003 동아시아식생활학회지 Vol.13 No.4
This study was performed to investigate the effects of peking-duck extracts added with medicinal herbs(DJ) on the intoxication of heavy metals (Hg, Pb, Cd, As) in rats. Sprague-Dawley rats weighing 150±15g, were randomly assigned to 5 groups: basal diet only in normal control group(NCG); basal diet and heavy metals without DJ injection in heavy metal control group(HMC); basal diet, heavy metals and DJ(3㎎/㎖) injection in heavy metal low duck juice group(HMLD), basal diet, heavy metals and DJ(30㎎/㎖) injection in heavy metal middle duck juice group(HMMlD); basal diet, heavy metal and DJ(300㎎/㎖) injection in heavy metal high duck juice group(HMHD). Hg and As was injected by 50ppm and Cd and Pb by 25ppm for 17days. Also DJ oral feeding was conducted for 28days. The result of this study were as follows: Food intake and body weight gain in heavy metal administered groups were lower than those of NCG. Liver, kidney and testis weights were not significantly different among 5 groups. GOT, GPT and BUN activities were significantly reduced in DJ treated groups as compared to HMC. DJ showed the suppressing effect on the accumulation of Hg, Pb and Cd in serum, liver and kidney. Fecal Hg and Cd excretions increased with DJ feeding. The results suggested that DJ may have some protective effects on Hg, Cd and Pb intoxication by reducing the accumulation m tissues and increasing excretion. This study also showed the effective way of using duck-extract and its application to the oriental medicine.
Cytotoxic and Apoptotic Activities of Tussilago farfara Extract in HT-29 Human Colon Cancer Cells
Mi-Ra Lee,Mi-Ran Cha,Kyung-Jin Jo,Mi-Young Yoon,Hae-Ryong Park 한국식품과학회 2008 Food Science and Biotechnology Vol.17 No.2
The flower buds of Tussilago farfara (TF) have been traditionally used in oriental medicine for the treatment of bronchitis and asthma. In our study, the primary objective was to determine the mechanisms that are inherent to TF-induced cytotoxicity and apoptosis, using the methanolic extract of TF (TFM) in HT-29 human colon cancer cells. We found that TFM-induced induced cytotoxicity in HT-29 cells in a dose-dependent manner. This effect was verified via an MTT reduction assay, an lactate dehydrogenase (LDH) release assay, and a colony formation assay. Interestingly, we also detected apoptotic bodies on Hoechst staining, and attempted to determine whether TFM-induced apoptosis involved the caspase pathway using a caspase-3/7 activity assay. Overall, the results indicate that TFM contain chemotherapeutic agents and potential candidates use for against human colon cancer cells.
Effects of zinc oxide nanoparticle dispersants on cytotoxicity and cellular uptake
Jo, Mi-Rae,Chung, Hae-Eun,Kim, Hyun-Jin,Bae, Song-Hwa,Go, Mi-Ran,Yu, Jin,Choi, Soo-Jin THE KOREAN SOCIETY OF TOXICOGENOMICS AND TOXICOPRP 2016 MOLECULAR AND CELLULAR TOXICOLOGY Vol. No.
Dispersion critically affects the physicochemical properties of nanoparticles and their interactions with biological systems. In this study, the effects of different zinc oxide nanoparticle (ZnO-NP) dispersants, that is, bovine serum albumin, citrate, carboxymethyl cellulose, fetal bovine serum, and cell culture medium, were investigated with respect to cytotoxicity and cellular uptake. Parallel comparative studies were also conducted with <TEX>$Zn^{2+}$</TEX> ions. The results demonstrated that ZnO-NPs dispersed in citrate exhibited the greatest cytotoxicity to human lung cells, probably related to their high cellular uptake via the citrate internalization mechanism, whereas, the energy-dependent endocytosis pathway of ZnO-NP internalization in cells was unaffected by dispersant type. These results emphasize that dispersant choice is important when evaluating the toxicity of nanoparticles and that results should be interpreted with caution.
( Mi Ran Jo ),( Mi Hee Park ),( Dong Young Choi ),( Dong Yeun Yuk ),( Yuk Mo Lee ),( Jin Moo Lee ),( Jae Hwang Jeong ),( Ki Wan Oh ),( Moon Soon Lee ),( Sang Bae Han ),( Jin Tae Hong ) 한국응용약물학회 2011 Biomolecules & Therapeutics(구 응용약물학회지) Vol.19 No.3
Amyloid beta (Aβ)-induced neurotoxicity is a major pathological mechanism of Alzheimer`s disease (AD). In this study, we investigated the inhibitory effect of L-theanine, a component of green tea (Camellia sinensis) on Aβ1-42-induced neurotoxicity and oxidative damages of macromolecules. L-theanine inhibited Aβ1-42-induced generation of reactive oxygen species, and activation of extracellular signal-regulated kinase and p38 mitogenic activated protein kinase as well as the activity of nuclear factor kappa- B. L-theanine also significantly reduced oxidative protein and lipid damage, and elevated glutathione level. Consistent with the reduced neurotoxic signals, L-theanine (10-50 μg/ml) concomitantly attenuated Aβ1-42 (5 μM)-induced neurotoxicity in SK-N-MC and SK-N-SH human neuroblastoma cells. These data indicate that L-theanine on Aβ-induced neurotoxicity prevented oxidative damages of neuronal cells, and may be useful in the prevention and treatment of neurodegenerative disease like AD.
Prevalence and antimicrobial resistance of Clostridium difficile isolated from Korean native cattle
Yu-Ran Lee(Yu-Ran Lee),Jong Wan Kim(Jong Wan Kim),Chung Hyun Kim(Chung Hyun Kim),Bun Seung Jo(Bun Seung Jo),Hyun Mi Kim(Hyun Mi Kim),ByungJae So(ByungJae So),Ha-Young Kim(Ha-Young Kim) 한국예방수의학회 2017 한국예방수의학회 학술대회자료집 Vol.2017 No.-