• Journal of Ginseng Research
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• 제23권2호
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• pp.99-104
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• 1999

인삼과 계피 추출물의 인체 직장암 세포(HT-29), 인체 간암 세포(HepG2)및 인체 결장암 세포(HRT-18)의 증식에 미치는 영향을 in vitro에서 확인하였다. 암세포의 배양액에서 인삼 추출물 또는 계피 추출물의 효과는 농도에 비례하여 암세포의 증식을 억제하였다. 세포증식의 억제 정도는 인삼과 계피 추출물을 단독으로 첨가한 것보다 병용하여 첨가한 경우 현저한 상승 효과를 나타내어, 낮은 인삼 농도에서도 HT-29, HepG2및 HRT-18암세포의 증식을 효과적으로 억제하였으며 심지어는 사멸시켰다. 인삼과 계피의 혼합물은 세포주기 중 G1 단계에서 S단계로의 진행을 지체시킴으로써 암세포의 증식을 억제하는 것으로 나타났다.

• 한국식품영양학회지
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• 제32권3호
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• pp.208-215
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• 2019

In this paper, we investigate to determine quality characteristics, fatty acid composition and cytotoxic effect of extracts and fractions from whole Lycopus lucidus Turcz. roots. Additionally, we evaluated cytotoxic activity against the growth of human fibrosarcoma cells (HT-1080) and human gastric adenocarcinoma (AGS), human colon cancer cell (HT-29) lines using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Acetone+methylene chloride (A+M) and methanol (MeOH) extracts from L. lucidus Turcz. were obtained through solvent extraction. Then we further fractionated both extracts with n-hexane, 85% aq. MeOH, n-butanol (n-BuOH) and water. In fatty acid composition, L. lucidus Turcz. contained 33.2% of 18:1n-9 and 1.81% of 18:3n-3, respectively. The incorporation of treatment with A+M and MeOH extracts and n-hexane, 85% aq. MeOH, n-butanol (n-BuOH) and water fractions dose-dependently increased cytotoxicity against the growth of HT-1080 and AGS, HT-29 cancer cells (p<0.05). The A+M extract had a higher inhibitory effect on the growth of all cancer cells in comparison to MeOH extract. Among the fractions, the 85% aq. MeOH and n-hexane fractions showed a higher inhibitory effect after proliferating the three cancer cells. These results suggest that the 85% aq. MeOH and n-hexane fractions have a potential to inhibit the growth of human cancer cell lines.

• 한국식품영양과학회지
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• 제35권9호
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• pp.1115-1120
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• 2006

육계 추출물의 대장암 세포에 미치는 영향을 HT-29 인체 결장암 세포주를 이용하여 조사하였다. 육계 추출물은 대장 정상세포인 CCD-112CoN의 성장에는 크게 영향을 미치지 않았으나, 대장암 세포인 HT-29의 성장은 농도, 시간에 의존적으로 크게 억제하였고, 대장암의 진행 과정에서 매우 중요한 COX-2 mRNA 발현량 및 $PGE_2$ 생성, cGMP 생성을 농도 의존적으로 억제하였다. 이상의 결과에서 육계 추출물은 정상세포에는 독성 없이 대장암 세포의 COX-2 및 $PGE_2$, cGMP 생성을 억제함으로써 결과적으로 대장암 세포의 성장을 감소시킨 것으로 판단된다. 따라서 육계는 부작용이 없는 대장암 예방 건강 보조식품으로서 개발 가능성이 있으며, 암세포 사멸에 대한 더욱 정확한 작용기전의 규명과 활성성분의 분리 및 정제, 응용법 등의 연구가 필요할 것으로 사료된다.

• 한국동물학회:학술대회논문집
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• 한국동물학회 1999년도 한국생물과학협회 학술발표대회
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• pp.254.2-254
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• 1999

No Abstract, See Full Text

• Preventive Nutrition and Food Science
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• 제12권2호
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• pp.84-88
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• 2007

In this study, we investigated antimutagenic and anticancer activities of leaf mustard (LM, Brassica juncea) and leaf mustard kimchi (LMK) during their fermentation period. Methanol extracts were prepared from raw mustard, brined leaf mustard in 10% Gueun salt solution for 2 hrs, leaf mustard fermented at 15$^{\circ}C$ for 5 days after brined in 10% Guenun salt solution for 2 hrs (Fr-LM), fresh leaf mustard kimchi (Fresh-LMK) and optimally ripened leaf mustard kimchi fermented at 5$^{\circ}C$ for 30 days (OR-LMK). OR-LMK showed the strongest inhibitory activities against the mutagenicities induced by aflatoxin B1 in Salmonella Typhimurium TA100. LMs and LMKs inhibited the survival or growth of AGS human gastric adenocarcinoma cells and HT-29 human colon carcinoma cells in MTT assay and growth inhibition test. Among the extracts, OR-LMK and FR-LM exhibited strong antiproliferative effect against cancer cells, especially HT-29 cells. DAPI staining assay showed that OR-LMK induced apoptosis cell death of HT-29 cells in a dose-dependent manner. These results suggest that leaf mustards and leaf mustard kimchi have chemopreventive activities.

• IMMUNE NETWORK
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• 제4권1호
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• pp.31-37
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• 2004

Background: 1-8D gene is a member of human 1-8 interferon inducible gene family and is shown to be overexpressed in fresh colon cancer tissues. Three peptides 1-6, 3-5 and 3-7 derived from 1-8D gene were shown to have immunogenicity against colon cancer. Methods: To study tumor immunotherapy of these peptides we established an adoptive transfer model. $D^{b-/-}{\times}{\beta}2$ microglobulin (${\beta}2m$) null mice transgenic for a chimeric HLA-A2.1/$D^b-{\beta}2m$ single chain (HHD mice) were immunized with irradiated peptide-loaded RMA-S/HHD/B7.1 transfectants. Spleens were removed after last immunization, and splenocytes were re-stimulated in vitro. Lymphocytes from vaccinated HHD mice were transferred together with IL-2 to the tumor bearing nude mice that were challenged S.C. with the HCT/HHD/B7 colon carcinoma cell line that was found to grow in these mice. Results: Peptide 3-5 was found to be highly effective in CTL activity. Adoptively transferred anti-peptide 3-5 cytolytic T lymphocytes caused significant retardation in tumor growth. Conclusion: This study shows that peptide 3-5 can be the most effective candidate for the vaccine of adoptive immunotherapy against colon cancer.

• Asian Pacific Journal of Cancer Prevention
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• 제14권10호
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• pp.5895-5900
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• 2013

Dictamnine (Dic) has the ability to exert cytotoxicity in human cervix, colon, and oral carcinoma cells and dihydroartemisinin (DHA) also has potent anticancer activity on various tumour cell lines. This report explores the molecular mechanisms by which Dic treatment and combination treatment with DHA and Dic cause apoptosis in human lung adenocarcinoma A549 cells. Dic treatment induced concentration- and time-dependent cell death. FCM analysis showed that Dic induced S phase cell cycle arrest at low concentration and cell apoptosis at high concentration in which loss of mitochondrial membrane potential (${\Delta}{\Psi}m$) was not involved. In addition, inhibition of caspase-3 using the specific inhibitor, z-DQMD-fmk, did not attenuate Dic-induced apoptosis, implying that Dic-induced caspase-3-independent apoptosis. Combination treatment with DHA and Dic dramatically increased the apoptotic cell death compared to Dic alone. Interestingly, pretreatment with z-DQMD-fmk significantly attenuated DHA and Dic co-induced apoptosis, implying that caspase-3 plays an important role in Dic and DHA co-induced cell apoptosis. Collectively, we found that Dic induced S phase cell cycle arrest at low concentration and cell apoptosis at high concentration in which mitochondria and caspase were not involved and DHA enhanced Dic induced A549 cell apoptosis via a caspase-dependent pathway.

• 대한핵의학회지
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• 제31권3호
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• pp.381-387
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• 1997

종양세포는 포도당섭취 및 포도당 대사가 정상세포에 비해 증가된 특징을 가진다. 포도당 유사체인 $^{18}F$ fluorodeoxyglucose(FDG)의 섭취를 이용한 PET 검사가 종양의 진단에 많이 쓰이고 있다. 이 연구에서는 유사한 성질을 가진 사람의 대장암 세포주간의 FDG 섭취량 및 섭취 속도의 차이점을 비교하고, 그 포도당 수송체의 발현의 관련성을 규명하고자 한다. 사람대장암 세포 SNU-C2A, SNU-C4, SNU-C5를 이용하여 FDG 섭취를 측정하였다. 또한 세포의 포도당 섭취에 중요 역할을 하는 포도당 수송체 1(GLUT1)의 발현을 Western blotting으로 비교하였다. $1{\times}10^6/ml$의 대장암 세포에 HEPES-buffered saline에 희석한 $1{\mu}Ci/ml$ FDG를 가하여 $37^{\circ}C$에서 1시간 배양하였을 때 SNU-C2A($16.8{\pm}1.36cpm/{\mu}g$ of protein), SNU-C4($12.3{\pm}5.55$), SNU-C5($61.7{\pm}2.17$) 섭취를 보였다. 시간당 FDG의 섭취는 SNU-C2A($0.29{\pm}0.03cpm/ min/{\mu}g$ of protein), SNU-C4($0.21{\pm}0.09$), SNU C5($1.07{\pm}0.07$)이었으며, 시간이 경과함에 따라 비례하여 증가하였다. Western blotting으로 측정한 GLUT1 은 SNU-C5의 경우 다량 발현되었으나 SNU-C2A와 SNU-C4는 소량 발현되었다. 따라서 SNU-C2A, SNU-C4, SNU-C5 세포는 이들 세포가 비록 유사한 특징을 가졌지만 FDG 섭취량과 섭취 속도 및 GLUT1의 발현이 다르고, 이들 세포의 배가시간(doubling time)은 FDG 섭취와 상관관계가 없었다. 이들 세포의 FDG 섭취와 GLUT1의 발현은 밀접한 상관관계가 있었다.

• Journal of Ginseng Research
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• 제10권1호
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• pp.27-35
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• 1986

본 연구는 인삼중 지용성 성분이 인체암 세포의 증식억제와 암세포내 효소 활성에 미치는 영향을 구명하고자 실시하였다. 인체 장암 세포인 HRT-18, HCT-48 및 HT-29등을 대상으로 인삼추출물 처리시 각 암세포의 증식율과 암세포내 효소 즉, sucrase, lactase, maltase 및 trehalase등 disaccharidas 활성을 측정한 바 다음과 같은 결과를 얻었다. 1. HTR-18, HT-29 및 HCT-48의 doubling time은 각각 약 20, 22, 24시간이 및 되었다. 2. 각 암세포의 증식율은 배양액 중 CX 함량의 증가와 연장에 따라 점차 더 억제되었다. 3. 인삼 extract를 함유하는 배양액에서 배양된 HRT-18 및 HCT-48 암세포의 sucarse활성은 각각 362% 및 577% 증가하였고, lactase(317%, 334%), maltase(134% 및 153%) 및 trehalase(311% 및 203%) 활성도 다 같이 유의성있게 증가하였다.

• Journal of Microbiology and Biotechnology
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• 제17권11호
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• pp.1856-1861
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• 2007

Physiological cell conditions such as glucose deprivation and hypoxia play roles in the development of drug resistance in solid tumors. These tumor-specific conditions cause decreased expression of DNA topoisomerase $II{\alpha}$, rendering cells resistant to topo II target drugs such as etoposide. Thus, targeting tumor-specific conditions such as a low glucose environment may be a novel strategy in the development of anticancer drugs. On this basis, we established a novel screening program for anticancer agents with preferential cytotoxic activity in cancer cells under glucose-deprived conditions. We recently isolated an active compound, AA-98, from Streptomyces sp. AA030098 that can prevent stress-induced etoposide resistance in vitro. Furthermore, LC-MS and various NMR spectroscopic methods identified AA-98 as mithramycin, which belongs to the aureolic acid group of antitumor compounds. We found that mithramycin prevents the etoposide resistance that is induced by glucose deprivation. The etoposide-chemosensitive action of mithramycin was just dependent on strict low glucose conditions, and resulted in the selective cell death of etoposide-resistant HT-29 human colon cancer cells.