• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.171-172
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• 2015

질염 환자의 질분비물 도말에서 광학현미경상에서 고배율로 관찰한 결과 정상 상피세포에서는 질내 정상 pH를 유지하기 위해 무수한 젖산균의 존재를 확인할수 있었다. 그러나 저배율, 고배율의 광학현미경상에서 진균에 감염된 세포 주변에서 젖산균(lactobacilli)은 관찰되지 않았다. 주사전자 현미경 상에서 Candida albicans는 기능을 탈락한 상피세포의 세포질에 기생하며, biofilm의 성장환경을 만들며, budding을 통해 2차 딸세포를 형성하며, 성장과 증식을 끊임없이 반복함을 확인하였다. 성장과 재생이 주기적으로 일어나지 않은 면역력이 약화된 임산부나, 호르몬의 부족으로 인한 위축성 질염 환자는 상피세포층이 떨어지면서 나오는 글리코겐을 이용해 질내에 존재하는 lactobacilli균이 젖산을 풍부하게 만들 수 없으므로 감염증 발생이 더 높아진 것으로 사료된다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.31 no.2
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• pp.329-332
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• 2002

We investigated the effect of Sarcodon aspratus extract on expression of cell cycle regulators. Methanol extract of Sarcodon aspratus showed a growth suppression on HepG2. As shown by western blot analysis, the expressions of cyclin A and Dl known as cell cycle regulators were decreased after treatment of Sarcodon aspratus extract. On the other hand, the expression of cyclin Bl was increased in the presence of Sarcodon aspratus extract. Furthermore, the expression of p53, a tumor supressor gene, and p27, a cell cycle dependent protein kinase inhibitor, were increased, whereas the expression of PCNA was decreased. In conclusion, our study suggests that growth inhibitory effect of Sardodon aspratus methanol extract on HepG2 is induced by cell cycle arrest in the Gl phase caused by decrease in cyclin A, Dl expressions and increases in p53, p27 expression.

• Journal of the Korean Society of Food Culture
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• v.5 no.4
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• pp.449-453
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• 1990

This study was designed to illuciate the effect of ginseng saponin on the growth of Bacillus cereus 425. The bacteria was cultured in the broth medium treated with ginseng saponin. The result is as follows : The binding experiment was tried to see relationship between the growth stimulation and increased nutrient absorption. The result showed that stimulation of glucose binding especially, increased cell growth. The ginseng saponin stimulated the cell growth showed a significant increase of acid phosphatase and alkaline phosphatase activities.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.34 no.1
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• pp.83-87
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• 2010

We present here the effect of extracellular matrix (ECM) on the proliferation and physiology of HL-1 cardiac cells. HL-1 cell is from AT-1 mouse atrial cardiomyocyte tumor lineage. HL-1 cell can be serially passaged, yet they maintain the ability to contract which is a promising character of HL-1 cell for the cell based biosensors. HL-1 cells grow up on the ECM which can affect on the attachment and growth of HL-1. In this paper, we discuss HL-1 cell-ECM interactions with three different ECMs and non-treated surface. HL-1 cells are grown for 4 days after seeding then observed their attachment. Also they were immunostained by hoechst and EthD-1 for proliferation, phalloidin for Factin, and DAPI for nuclei. Fibronectin was revealed as the proper ECM material for HL-1 cell culture. This study can provide basic information for understanding the cell-ECM interactions and growth of HL-1 cells.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1993.04a
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• pp.56-56
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• 1993

새로운 cell cycle 특이적 억제제의 스크리닝 방법의 확립과 이를 이용하여 cell cycle 억제제의 검색 및 세포분열 및 성장을 억제하는 작용의 분석과 이들의 항암작용 및 세포성장 및 분열 억제 작용의 signal transduction mechanism을 규명한다. 이상의 연구를 수행하기 위해 흰쥐 재생간 조직 및 흰쥐 일차 배양 간세포를 연구 모델로 하여 스크리닝 방법을 확립하고, 세포 분열 및 성장 억제제의 연구 대상 약물로는 기존의 천연물 및 미생물의 2차 대사 산물을 분리 정제한 물질등을 사용하여 그 작용 효능을 연구한다. 1) 흰쥐 부분 간 절제 수술 26시간 후 핵 단백질을 분리 2) MPF activity 측정 3) MPF 활성 저해제 생산 균주의 1차 탐색

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.5
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• pp.555-560
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• 2008

Amino acid transporters are essential for the growth and proliferation in all living cells. Among the amino acid transporters, the system L amino acid transporters are the major nutrient transport system responsible for the $Na^+$-independent transport of neutral amino acids including several essential amino acids. The L-type amino acid transporter 1 (LAT1), an isoform of system L amino acid transporter, is highly expressed in cancer cells to support their continuous growth and proliferation. 2-Aminobicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH) is a model compound for the study of amino acid transporter as a system L selective inhibitor. We have examined the effect and mechanism of BCH on cell growth suppression in HEp2 human head and neck squamous cell carcinoma. The BCH inhibited the L-leucine transport in a concentration-dependent manner with a $IC_{50}$ value of $51.2{\pm}3.8{\mu}M$ in HEp2 cells. The growth of HEp2 cells was inhibited by BCH in the timeand concentration-dependent manners. The formation of DNA ladder was not observed with BCH treatment in the cells. Furthermore, the proteolytic processing of caspase-3 and caspase-7 in the cells were not detected by BCH treatment. These results suggest that the BCH inhibits the growth of HEp2 human head and neck squamous cell carcinoma through the intracellular depletion of neutral amino acids for cell growth without apoptotic processing.

• Journal of Life Science
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• v.22 no.4
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• pp.492-498
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• 2012

To investigate whether phytochemicals affect cancer cell viability, human colorectal HCT116 cells were treated with four different phytochemicals. Among these phytochemicals, curcumin is the strongest inhibitor of cell proliferation. In addition, it decreased cell viability in a dose-dependent manner. To unveil the molecular mechanisms involved in the inhibition of cell proliferation by curcumin, we carried out oligo DNA microarray analysis. We found that 137 genes were up-regulated more than 2-fold, and 141 genes were down-regulated more than 2-fold by 25 ${\mu}M$ curcumin treatment. Among the up-regulated genes, we selected 3 genes (ATF-3, GADD45A, and NR4A1) to confirm microarray data. The results of RT-PCR strongly agreed with those of the microarray data. Among the phytochemicals used in this study, curcumin is the strongest inducer of ATF3 expression, and increased ATF3 expression in a dose-dependent manner. Interestingly, FACS analysis showed that the inhibition of cell growth by curcumin was recovered by ATF3-siRNA transfection. Finally, we detected the changes of gene expression by ectopic expression of ATF3. The results indicated that many up-regulated genes were related to apoptosis. Overall, these results suggest that ATF3 may play an important role in the anti-proliferative activity of curcumin in human colorectal cancer cells.

• The Korean Journal of Pharmacology
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• v.29 no.1
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• pp.73-83
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• 1993

In order to examine the effect of ${\beta}-estradiol$ on the cell growth, using a primary rabbit kidney poximal tubule cell culture system. We investigated the effect of ${\beta}-estradiol$ on alpha 1 (IV) collagen and ${\beta}-actin$ mRNA levels from primary rabbit kidney cell cultures, and also the effects of 3 growth factors and ${\beta}-estradiol$ supplementation on the growth of primary rabbit kidney proximal tubule cells in the serum-free medium. 1 nM of ${\beta}-estradiol$ showed a sizable potentiation effect on the growth of the proximal tubule cell in serum-free medium, but higher concentration (> 10 nM) of estradiol indeed inhibited the growth. In the absence of hydrocortisone as a growth supplement in serum-free medium, ${\beta}-estradiol$ caused to potentiate the growth of the cell. In the presence of hydrocortisone, ${\beta}-estradiol$ also potentiated the growth of the proximal tubule cells. According to the Northern analysis, ${\beta}-estradiol$ increased the level of ${\beta}-actin$ mRNA, although mRNA level of the alpha I(IV) collagen was not changed significantly.

• Journal of Acupuncture Research
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• v.28 no.3
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• pp.101-110
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• 2011

목적 : 이 연구는 봉독이 NF-${\kappa}$B의 활성억제를 통하여 전립선 암세포주인 DU-145 세포의 성장을 억제하 는지를 확인하고 그 기전을 살펴보고자 하였다. 방법 : 봉독을 처리한 후 DU-145의 성장억제를 관찰하기 위해 WST-1 assay를 시행하였고, 세포자멸사의 관찰에는 DAPI staining assay를 통한 세포형태관찰을 시행하였으며, 염증관련유전자 발현 관찰에는 western blot analysis를 시행하였고, 세포자멸사와 연관된 NF-${\kappa}$B의 활성 변화를 관찰하기 위해 EMSA와 luciferase assay를 시행하였으며, DU-145에서 봉독과 NF-${\kappa}$B의 상호작용을 관찰하기 위해 transient transfection assay를 시행하여 세포생존율과 NF-${\kappa}$B의 활성 변동을 측정하였다. 결과 : DU-145 세포에서 봉독을 처리한 후 세포성장이 억제되었으며, 염증관련유전자 발현 및 NF-${\kappa}$B의 활성의 유의한 감소를 나타내었다. DU-145 세포에서 NF-${\kappa}$B의 p50와 IKK들을 치환하여 작용기를 없애고 봉독을 처리하였을 경우에도 세포활성 및 NF-${\kappa}$B의 활성의 유의한 감소를 나타내었다. 결론 : 이상의 결과는 봉독이 NF-${\kappa}$B의 활성 억제를 통하여 인간 전립선암세포주인 DU-145의 세포자멸사를 유발함으로써 증식억제 효과가 있음을 입증한 것으로 전립선암의 예방과 치료에 대한 효과적인 치료제 개발에 도움이 될 것으로 기대된다. 다만 그 기전에서 봉독은 기존연구와 같은 NF-${\kappa}$B p50 및 IKK들의 작용기와 상호작용 이외에 다른 기전이 관여되는 것으로 심화 연구를 요한다.

• KSBB Journal
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• v.10 no.4
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• pp.455-460
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• 1995

Specific growth rate was controlled for the repression of acetic acid formation in the fed-batch fermentation of recombinant Escherichia coli. With controlled specific growth rate, we studied the effect of the specific growth rate on cell growth, glucose consumption, acetic acid formation, and the expression of recombinant protein (${\beta}$-lactamase). High specific growth rate caused the accumulation of glucose and acetic acid, and lowered the production of recombinant protein. However, the addition of methionine recovered the gene expression by alleviating the negative effect of acetic acid at high specific growth rate.