• Radiation Oncology Journal
• /
• v.19 no.4
• /
• pp.381-388
• /
• 2001

Purpose : This study was conducted to assess the effects of x-irradiation on the expression of the novel glutathione S-transferase K1 gene. Materials and methods : Human glutathione S-transferase K1 (hGSTK1) DNA was purified and ligated to a pcDNA3.1/Myc-His(+) vector for the overexpression of hGSTK1 gene. MCF-7 cells were transfected with or without the recombinant hGSTK1 gene, and irradiated with 6 MV x-ray. After incubation of 14 days, cell survival was measured and compared. The expression of hGSTK1 and the effect of x-irradiation on hGSTK1 expression were also estimated in MCF-7 cells transfected with or without the hGSTK1 gene by RT-PCR. Results : Following 2 to 12 Gy of x-irradiation, the cell survivals were higher in the MCF-7 cells transfected with the hGSTK1 gene than in those without transfection. Despite the higher cell survival in the hGSTK1-transfected cells, RT-PCR for hGSTK1 mRNA revealed no significant differences according to radiation dose, fractionation, and time after irradiation. Conclusion : The MCF-7 cells transfected with the hGSTK1 gene showed higher cell survival than those without transfection of the gene. The hGSTK1 gene might be associated with the radiosensitivity of MCF-7 cell line and further analysis should be needed.

• Journal of Life Science
• /
• v.28 no.11
• /
• pp.1316-1320
• /
• 2018

The effects of a green tea extract (GTE) were examined using the MCF-7 human breast cancer cell line. Cell viability assays using 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays revealed that GTE had a significant cytotoxic effect on MCF-7 cells, depending on the concentration of GTE. Western blotting of p53 and its related proteins, p21/cip1 and CDK2, after GTE treatment revealed that a significant and concentration dependent increase in p53 protein in response to GTE. The levels of p21/cip1 proteins were also increased at low GTE concentrations were significantly increased even at the highest GTE concentrations. However, the level of CDK2 was significantly decreased by treatment with high concentrations of GTE. These results indicate that treatment with GTE increased the p53 level in MCF-7 cells, and this activation of p53 markedly elevated the levels of p21/cip1proteins, which, in turn, inhibited CDK2 expression in the MCF-7 cells. The inhibition of CDK2 expression might then affect cell cycle progression. Subsequent FACS analysis indicated that GTE treatment the gradually increased progression of the MCF-7 to the G1 phase. These results clearly demonstrate that the anti-tumor effect of GTE in MCF-7 cells is regulated by p53 arrest of the MCF-7 cells at the G1 stage of cell cycle.

• Journal of Acupuncture Research
• /
• v.26 no.3
• /
• pp.27-38
• /
• 2009

목적 : 이 연구는 Vipera lebetinat turanica의 사독약침액(蛇毒藥鍼液)(Snake venom toxin, SVT)이 인간 유방암 세포주인 MCF-7과 MDA-MB-231 세포에서 암세포성장의 억제 및 그 기전에 대하여 살펴보고자 하였다. 방법 : SVT를 처리한 후 MCF-7과 MDA-MB-231의 성장억제를 관찰하기 위해 CCK-8 assay를 시행하였고, apoptosis 평가에는 TUNEL assay를 시행하였다. 세포자멸사 관련 세포기전을 보기 위하여 세포내 활성산소량 및 미토콘드리아의 세포막전위 변화를 측정하였고, 세포자멸사 조절 단백인 Bax, Bcl-2 발현 변화 관찰에는 westem blot analysis를 시행하였다. 결과 : MCF-7과 MDA-MB-231 세포에 SVT를 처리한 후, 유방암 세포의 성장, Apoptosis의 유발 및 기전에 미치는 영향을 관찰하여 다음과 같은 결과를 얻었다. 1. MCF-7 세포와 MDA-MB-231 세포에서 SVT를 처리한 후 유방암 세포 성장이 억제되었다. 2. TUNEL assay를 통한 세포자멸사 평가에서 SVT를 처리한 MCF-7세포와 MDA-MB-231 세포 모두 세포자멸사 활성세포의 유의한 증가를 나타내었다. 3. 세포자멸사 관련 세포기전연구에서 SVT를 처리한 MCF-7 세포와 MDA-MB-231 세포에서 세포내 활성산소의 유의한 증가와 미토콘드리아 세포막 전위의 유의한 변동이 관찰되었다. 4. SVT를 처리한 MCF-7세포와 MDA-MB-231세포는 세포자멸사 관련 단백 발현에서 Bax의 유의한 증가와 Bcl-2의 유의한 감소를 나타내었다. 결론 : 이상의 결과는 SVT가 세포내 활성산소를 증가시킴으로써 미토콘드리아의 세포막전위에 변화를 일으켜 유방암 세포주인 MCF-7과 MDA-MB-231 세포에 세포자멸사를 유발하여 증식억제 효과가 있음을 입증한 것이다.

• Journal of Life Science
• /
• v.22 no.9
• /
• pp.1145-1151
• /
• 2012

Aspirin and its deacetylated form, sodium salicylate (NaSal), have been shown to exert chemopreventive activities against many human cancers including those of the colon, lung, and breast. Previously, we showed that combined treatment of NaSal and genistein synergistically induced apoptosis in A549 lung cancer cells, indicating that these two natural chemicals could be used in combination for cancer therapy. In this study, we examined effects of NaSal/genistein combined treatment on other cancer cells and in three-dimensional multicellular tumor spheroid (MTS) and in an in vitro solid tumor model. We found that the combined treatment induces apoptosis in the HCT116 cells and the A549 cells, but not in the MCF-7 cells. Interestingly, the MCF-7 cells responded to the NaSal/genistein combined treatment by undergoing cell death when they were cultivated as MTS. The combined treatment induced apoptosis at an earlier stage in the MCF-7 MTS culture. However, when the MCF-7 MTS was cultivated for a longer period, it induced necrosis rather than apoptosis. We further found that the apoptotic pattern observed in MCF-7 MTS was incomplete: the chromatins were condensed and fragmented, but the nuclear membrane was still intact. Taken together, these results demonstrate that the NaSal/genistein combined treatment induces incomplete apoptosis and necrosis in the MCF-7 MTS culture system.

• The Journal of Korean Obstetrics and Gynecology
• /
• v.19 no.3
• /
• pp.13-24
• /
• 2006

Purpose : 이 연구는 MCF-7 인간 유방암 세포주에 대한 활락효령단(活絡效靈丹) 추출물의 증식억제효과, 세포독성효과, 세포사 유발효과를 확인하기 위하여 이루어졌다. Methods : MCF-7 인간 유방암 세포주는 Dulbecco's modified Eagle's medium/F12 (DMEM/F12)에 10% fetal bovine serum (FBS)와 항생제를 가하여 만든 배지를 이용하여 배양하였고 MCF-7 세포를 96-well plate에 접종한 후 다양한 농도 (0 ${\sim}$ 2000 g/ml)의 활락효령단(活絡效靈丹)이 든 배지로 처리한 후 72시간 동안 배양하였고 또한 1000g/ml의 활락효령단(活絡效靈丹)이 든 배지로 처리한 후 48, 96, 192 시간동안 배양하여 각각 MTS assay kit로 세포생존율을 측정하였다. 세포독성은 Sulforhodamine B assay 방법을 이용해 측정하였고 세포사 과정에서 MCF-7 세포에서의 caspase 활성화를 측정하기 위해 Western blotting을 수행하여 poly ADP ribose polymerase (PARP)의 절단을 확인하였다. Results : 실험결과 활락효령단(活絡效靈丹) 추출물에 의한 세포성장 및 독성효과는 시간 및 농도에 비례하는 것으로 나타났고 세포고사과정에서 작용하는 caspase의 전기질인 PARP 절단량이 활락효령단(活絡效靈丹) 처리 농도에 비례에 증가하였다. Conclusions : 활락효령단(活絡效靈丹)은 다양한 기전에 의해서 유방암 세포에 대한 억제효과를 가질 수 있는 것으로 인식할 수 있다.

• KSBB Journal
• /
• v.18 no.5
• /
• pp.424-428
• /
• 2003

In the present study, we have analyzed effects of the endocrine distruptors, such as bisphenol A, nonylphenol and pentachlorophenol, on cell proliferation in the human breast cancer cell line, MCF-7, and the human prostate cancer cell line, PC-3, with MTT method. A dose dependent analysis of the cell proliferation of MCF-7 cells after administration of bisphenol A, nonylphenol and pentachlorophenol revealed a significant induction of cell proliferation. Maximum induction of cell proliferation was observed at concentrations between 10$\^$-7/ and 10$\^$-6/ M. Whereas, these chemicals had little effect on proliferation of PC-3 cells. These results demonstrated that bisphenol A, nonylphenol and pentachlorophenol do not induce proliferation of PC-3 cells but exhibit a significant induction of MCF-7 cell proliferation, suggesting all these chemicals are a estrogen mimic.

• The Journal of Korean Obstetrics and Gynecology
• /
• v.19 no.1
• /
• pp.155-165
• /
• 2006

이 연구는 MCF-7 인간 유방암 세포주에 대한 귀출파징탕(歸朮破癥湯) 추출물의 증식억제효과 세포독성효과 세포사 유발효과를 확인하기 위하여 이루어졌다. MCF-7 인간 유방암 세포주는 Dulbecco's modified Eagle's medium/F12 (DMEM/F12)에 10% fetal bovine serum(FBS;Gibco) 와 항생제를 가하여 만든 배지를 이용하여 배양하였고, MCPF-7 세포를 96- well plate에 접종한 후 다양한 농도(0~2000g/ml)의 귀출파징탕(歸朮破癥湯)이 든 배지로 처리하고 다양한 시간(48, 96, 192)동안 배양하여 현미경으로 관찰하고 각각 MTS assay kit를 이용하여 세포생존율을 측정하였다. 세포독성은 Sulforhodamine B assay 방법을 이용해 측정하였고 세포사 과정에서 MCF-7세포에서의 caspase 활성화를 측정하기 위해 Western blotting을 수행하여 poly ADP ribose polymerase(PARP)의 절단을 확인하였다. 실험결과 귀출파징탕(歸朮破癥湯) 추출물에 의한 세포성장 및 독성효과는 시간 및 농도에 비례하는 것으로 나타났고 세포고사과정에서 작용하는 caspase의 전 기질인 PARP 절단량이 귀출파징탕(歸朮破癥湯) 처리 농도와 시간에 비례하여 증가하였다. 이것은 caspase-3가 MCF-7 세포의 성장을 억제하는데 중요한 역할을 수행함을 의미한다. 따라서 귀출파징탕(歸朮破癥湯)은 다양한 기전에 의해서 유방암 세포에 대한 억제효과를 가진다는 것을 인식할 수 있다.

• Journal of Applied Biological Chemistry
• /
• v.63 no.2
• /
• pp.147-152
• /
• 2020

Farrerol is a flavanone isolated from the traditional Chinese herb 'Man-shan-hong' (Rhododendron dauricum L.). Farrerol has been reported to have various bioactivities including anti-oxidant, anti-inflammation, and anti-fungal. However, anti-cancer effect of farrerol has not yet been reported in MCF-7 breast cancer cells. In the present study, we investigated the anti-cancer effect of farrerol on MCF-7 cells. Farrerol decreased viability and induced apoptosis of MCF-7 cells in a dose dependent manner. Ferrerol exhibited a significant anti-proliferation effect with a half-maximal inhibitory concentration (IC₅₀) values of 145.04±1.4 μM in MTT assay, when MCF-7 cells were treated with ferrerol for 48 h. Also, ferrerol induced apoptotic bodies of MCF-7 cells as evaluated by TUNEL assay and Annexin V/PI staining using FACS. By mechanism of action, ferrerol regulated the activation of p38 mitogen-activated protein kinase and altered the expression level of BAX, Bcl-2, and Poly ADP Ribose Polymerase in MCF-7 cells. In summary, our finding demonstrated that ferrerol has anti-cancer effect through regulating the activation and expression of apoptosis-related proteins in MCF-7 cells.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.36 no.7
• /
• pp.825-831
• /
• 2007

Anti-proliferation effects of decursin from Angelica gigas Nakai were investigated in the MCF-7 cells treated with environmental hormones. The proliferation was decreased in a dose-dependent manner at the concentration over 20 ${\mu}g/mL$ in the MCF-7 cells treated with decursin of various concentrations. The environmental hormones such as $17{\beta}$-estradiol and bisphenol increased the growth of MCF-7 cells in the charcoal-treated FBS (cFBS) medium and the proliferation was the highest at 0.1 ${\mu}M$ among the tested hormone concentration. Decursin was predicted to inhibit the proliferation in a dose-dependent fashion at tested concentrations (1, 3, 10 or 30 ${\mu}g/mL$) in the MCF-7 cells added environmental hormones; however, the survival rate of the cells was lower than that of control cells that were not treated with decursin at 30 ${\mu}g/mL$ concentration. The chromatin condensation and apoptotic body were examined in the decursin treated cells cultured with the cFBS medium added environmental hormones. These results suggest that decursin decreased the proliferation through apoptosis in the MCF-7 cells added environmental hormones.

• The Journal of Korean Obstetrics and Gynecology
• /
• v.21 no.4
• /
• pp.90-103
• /
• 2008

목적 : 본 연구는 현호색의 메탄올 추출물(Corydalis Tuber Extract:CTE)이 인간 유방암 세포인 MCF-7 세포의 자멸사에 미치는 영향을 알아보고자 하였다. 방법 : 현호색 메탄올 추출물로 인간유방암에서 유래된 MCF-7 세포를 처리하였다. CTE의 세포자멸사 유도 효과는 MTT, FACS, TUNEL, DNA laddering and immunoblot assay를 통하여 측정하였다. 결과: 본 연구에서 현호색 메탄올 추출물은 MCF-7 세포의 활성을 감소시켰다. CTE로 처리한 MCF-7 세포는 용량에 따라 세포 자멸사 과정이 증가했다. CTE에 노출하였을 때 Bcl-2와 $Bcl-_{XL}$의 발현을 억제하고, 미토콘드리아로부터 세포질로 cytochrome-c를 방출하며, caspase와 PARP의 절단을 유발하여 세포자멸사가 증가했다. 현호색 메탄올 추출물에 존재하는 성분중에서 coptisine이 세포 활성도를 효과적으로 감소시킨 것으로 사료된다. 결론: 실험결과 현호색 메탄올 추출물이 유방암의 임상 치료에 있어 가능성 있는 치료 방법이 될 수 있을 것으로 사료된다.