• 제목/요약/키워드: Lung cancer cells

검색결과 994건 처리시간 0.039초

B16 흑색종에 대한 팽이버섯 추출물의 항암활성 비교 (Analysis of Anti-Tumor Activity of Flammulina velutipes Extract on B16 cells)

  • 이시림;남동윤;이현진;박철홍;허진철;김종국;이진만;이창윤;박희주;이상한
    • 한국식품저장유통학회지
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    • 제16권4호
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    • pp.599-603
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    • 2009
  • 버섯은 예전부터 단백질, 당질, 비타민, 무기질 등 일반 영양소들이 다량 함유되어 있을 뿐 아니라 다양한 약리작용을 가지고 있기 때문에 예로부터 민식용 및 민간요법으로도 많이 이용되어 왔다(17). 또한 현재에는 건강식으로 다양하게 이용되고 있다. 본 연구는 여러 가지 버섯 중, 팽이버섯의 추출물을 이용하여 이의 항암 활성을 실시하였다. 팽이버섯(Flammulina velutipes)의 항암활성을 검증하기 위하여 in vitro 실험으로 wound healing 활성 실험을 하였으며, in vivo 실험으로 마우스를 이용한 항암모델 실험을 실시하였다. Wound healing 활성 실험 결과 팽이버섯 추출물의 농도를 0-100 ug/mL로 처리함에 따라 B16 세포의 운동성이 감소하는 것을 알 수 있었다. 이를 바탕으로 마우스를 이용하여 항암 모델에 적용한 결과 B16 세포로 인해 형성되는 colony가 팽이버섯 추출물을 처리한 군에서 약 60% 내외로 현저히 감소하는 것을 알 수 있었다. 본 실험 결과는 팽이버섯 추출물의 항암 활성을 확인 한 것으로 향후 이의 추출물을 이용한 세포신호전달과정 등에 관한 연구와 건강기능성식품의 소재로의 제품 개발에 유용하게 사용될 수 있음을 나타내는 주요한 자료로 판단된다.

양파김치 메탄올추출물의 항암 및 면역활성 (Anticancer and Immuno - Activity of Onion Kimchi Methanol Extract)

  • 박경욱;김재용;조영숙;이성태;정창호;강갑석;서권일
    • 한국식품영양과학회지
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    • 제33권9호
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    • pp.1439-1444
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    • 2004
  • 양파 및 양파김치에 대한 항암 및 면역활성을 조사한 결과는 다음과 같다. 양파 및 양파김치 메탄올 추출물은 aflatoxin $B_1$로 돌연변이를 유도한 Salmonella typhimurium에 대하여 농도 의존적으로 항돌연변이 효과가 큰 것으로 나타났으며, 양파김치 첨가군이 양파의 첨가군보다 그 효과가 더욱 크게 나타났다. 양파 및 양파김치 메탄올 추출물은 A549 및 MCF-7 암세포주에 처리한 결과 추출물을 처리하지 않은 대조구에 비하여 1,000 ${\mu}$g/mL 농도에서 모두 20% 이상 그 성장을 억제하였다. 양파김치 메탄올 추출물은 농도에 비례하여 비장세포의 증식을 유도하였고, 양파 추출물보다 더 높은 증식을 유도하였다. 양파 및 양파김치 메탄올 추출물을 처리한 대식세포주에서 NO의 생성이 농도 의존적으로 증가하였으며, 역시 양파김치 추출물이 양파 추출물보다 더 많은 NO을 생성량을 유도하였다.

양파고추장 메탄올추출물의 항암 및 면역활성 (Anticancer and Immuno-activity of Methanol Extract from Onion Kochujang)

  • 김재용;박경욱;양현숙;조영숙;정창호;심기환;이성태;서권일
    • 한국식품저장유통학회지
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    • 제12권2호
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    • pp.173-178
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    • 2005
  • 양파고추장에 대한 항암 및 면역활성을 조사한 결과는 다음과 같다. 고추장 메탄을 추출물은 aflatoxin $B_{1}$으로 돌연변이를 유도한 Salmonella typhimurium에 대하여 농도 의존적으로 항돌연변이 효과가 큰 것으로 나타났으며, 양파를 첨가하지 않은 대조구 고추장보다 양파고추장이 그 효과가 더욱 크게 나타났다. 양파고추장 메탄올추출물은 A549 및 MCF-7 암세포주에 처리한 결과 대조구에 비하여 $1,000\;{\mu}g/mL$농도에서 모두 $20\%$ 이상 그 성장을 억제하였다. 양파 고추장 메탄올추출물은 농도에 비례하여 비장세포의 증식을 유도하였고, 대조구 고추장 추출물보다 더 높은 증식을 유도하였다. 고추장 추출물을 처리한 대식세포주에서 NO의 생성이 농도 의존적으로 증가하였으며, 역시 양파고추장 추출물이 대조구 고추장 추출물보다 더 많은 NO을 생성량을 유도하였다.

모시잎의 항산화 효과 및 암세포주에 대한 세포 독성 (Antioxidant Activities and Cell Viability against Cancer Cells of Adenophora remotiflora Leaves)

  • 김인숙;박권삼;유현희;신미경
    • 동아시아식생활학회지
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    • 제19권3호
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    • pp.384-394
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    • 2009
  • 본 연구는 모시잎의 핵산 분획물, 에틸아세테이트 분획물, 메탄올 분획물, 물 추출물에 대해 항산화성 효과와 BNLcl2 cell(인체 정상 간세포)의 세포독성 실험, A549 cell(폐암세포 주)와 Hep G2 cell(간암세포주)에 대한 항암성을 탐색한 결과는 다음과 같다. 모시잎의 각 용매별 분획물 시료를 DPPHradical 소거능으로 항산화 효과를 검토한 결과, $SC_{50}$이 메탄올 분획물, 물 추출물, BHT가 각각 47.5 ${\mu}g$/mL, 74.6 ${\mu}g$/mL, 102.2 ${\mu}g$/mL로 나타나, 이들 모시잎 분획물은 합성항산화제인 BHT보다 항산화 활성이 높음을 알 수 있었다. 또한, 헤모 글로빈 유도 linoleic acid의 산화 억제 활성을 측정한 결과에서도 메탄올 분획물과 물 추출물에서 $IC_{50}$이 메탄올 분획물, 물 분획물 120.8 ${\mu}g$/mL, 135.6 ${\mu}g$/mL로 BHT의 150.2 ${\mu}g$/mL보다 낮아 항산화 효과가 높았다. BNLcl2 cell(인체 정상 간세포)에서 대조군에 대한 모시잎의 용매 분획별, 농도별(1, 5, 10, 25, 50, 100, 250, 500, 1,000, 2,000 ${\mu}g$/mL)로 처리한 실험군의 세포 생존율의 저하를 알아본 결과, 물 분획물은 모든 농도에서 대조군에 비해 유의적인 생존율의 저하는 없었으나, 핵산, 에틸아세테이트, 메탄올 분획물은 1,000 ${\mu}g$/mL 이상에서 대조군에 비해 유의적(p<0.01~p<0.001)인 생존율의 저하가 있어 세포독성이 있는 것으로 나타났다. 항암 활성은 A549 cell 폐암세포주에 대해 메탄올 분획물이 다른 분획물에 비해 폐암세포주 생존율을 억제시켜 500 ${\mu}g$/mL에서 대조군보다 생존율이 46%까지 낮아졌다. Hep G2 cell 간암 세포주에 대한 항암 활성이 A549 cell보다 높았으며, Hep G2 cell에 대한 항암 활성은 500 ${\mu}g$/mL에서 메탄올 분획물은 28%까지 생졸이 낮았으며, 에틸아세테이트 분획물 30%, 물 추출물 36%, 핵산 분획물 52% 순이었다. 따라서 본 실험의 결과에 비추어 볼 때 모시잎은 산화와 변질의 원인이 되는 항산화 효과뿐만 아니라 폐암과 간암 세포의 성장을 저해하는 효과가 있었다. 총 폴리페놀 함량을 측정한 결과, 메탄올 분획물과 물 분획물에서 함량이 높아 항산화 활성과 폐암 세포의 성장 저해 물질은 폴리페놀 계통일 것으로 생각되며, 간암 세포 성장 저해는 전체 유기 용매 분획물에 효과가 나타난 것으로 보아 폴리페놀 계통 외에 다른 생리활성 물질이 있을 것으로 보여, 이들 물질에 대한 추후 연구가 요구되며, 앞으로 식품뿐만 아니라 의약품의 원료 및 첨가물 등 다양한 제품에 이용할 수 있을 것으로 보인다.

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감잎에서 분리한 다당의 면역자극 활성 (Immuno-stimulating Activities of Polysaccharide Fractions Isolated from Persimmon Leaves)

  • 신영아;박혜령;홍희도;신광순
    • 한국식품영양학회지
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    • 제25권4호
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    • pp.941-950
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    • 2012
  • In order to develop new physiologically active polysaccharides from persimmon leaves, two different crude polysaccharides were prepared using hot water (PLW-0) and pectinase digestion (PLE-0) and their immuno-stimulating activities were estimated. PLW-0 and PLE-0 showed similar sugar compositions with 15 different sugars, including rarely observed sugars in general polysaccharides such as 2-O-methyl-fucose, 2-O-methyl-xylose, apiose, aceric acid, 3-deoxy-D-manno-2-octulosonic acid, and 3-deoxy-D-lyxo-2-heptulosaric acid, but the uronic acid content of PLE-0 was lower than that of PLW-0 caused by pectinase treatment. Both PLW-0 and PLE-0 showed potent anti-complementary activity in a dose-dependent manner which was similar to a known immuno-stimulating polysaccharide, PSK, from Coriolus versicolor. The activity of PLE-0 at a low concentration ($100{\mu}g/m{\ell}$) was higher than that of PLW-0. In an in vitro cytotoxicity analysis, PLW-0 and PLE-0 (up to $1,000{\mu}g/m{\ell}$) did not affect the growth of peritoneal macrophages and Colon 26-M3.1 carcinoma cells. In contrast, they enhanced lymphocyte proliferation activity. Peritoneal macrophages stimulated with PLW-0 and PLE-0 produced various cytokines, such as IL-6 and IL-12. However, PLE-0 was more effective on the cytokine production. Intravenous administration of PLW-0 and PLE-0 significantly augmented natural killer (NK) cell cytotoxicity against Yac-1 tumor cells 3 days after the treatment of polysaccharide fractions. But NK cells obtained from the PLE-treated group showed higher tumoricidal activity even at a low dose of $40{\mu}g$/mouse. In experimental lung metastasis of Colon 26-M3.1 carcinoma cells, prophylactic administration of PLW-0 and PLE-0 significantly inhibited lung metastasis in a dose-dependent manner and PLE-0 was more effective on the inhibition of cancer metasasis. The results lead us to conclude that the pectinase-treated process is indispensable to preparing polysaccharides with higher immune-stimulating activity from persimmon leaves.

사람의 정상 피부세포 및 폐세포의 발암에 미치는 2,3,7,8-Tetrachlorodibenzo-$\rho$-dioxin의 영향 (Tumorigenic Effects of 2,3,7,8-Tetrachlorodibenzo-$\rho$-dioxin in Normal Human Skin and Lung Fibroblasts)

  • 강미경;염태경;김강련;김옥희;강호일
    • 한국환경성돌연변이발암원학회지
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    • 제26권3호
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    • pp.77-85
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    • 2006
  • 2,3,7,8-Tetrachlorodibenzo-$\rho$-dioxin(TCDD) displays high toxicity in animals and has been implicated in human carcinogenesis. Although TCDD is recognized as potent carcinogens, relatively little is known about their role in the tumor promotion and carcinogenesis. It is known that TCDD can increase of cancer risk from various types of tissue by a mechanism possibly involving the aryl hydrocarbon receptor (AhR) activation. In this study, effects of TCDD on cellular proliferation of normal human skin and lung fibroblasts, Detroit551 and WI38 cells were investigated. In addition, to enhance our understanding of TCDD-mediated carcinogenesis, we have investigated process in which expression of Erk1/2, cyclinD1, oncogene such as Ha-ras and c-myc, and their cognate signaling pathway. TCDD that are potent activators of AhR-mediated activity was found to induce significant increase of cytochrome P4501A1 mRNA expression, suggesting a presence of functional AhR. These results support that CYP1A1 enzyme may be involved in the generation of TCDD-induced toxicity. Moreover mitogen-activated protein kinases (MARKs) phosphorylation and cyclin D1 overexpression are induced by TCDD, which corresponded with the progression of cellular proliferation. However, TCDD did not affected Ha-ras and c-myc mRNA expression. Taken together, it seems that TCDD are could be a part of cellular proliferation in non-tumorigenic normal human cells such as Detroit551 and WI38 cells through the upregulation of MAPKs signaling pathway regulating growth of cell population. Therefore, AhR-activating TCDD could potentially contribute to tumor promotion and Detroit551 and WI38 cells have been used as a detection system of tumorigenic effects of TCDD.

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인테그린 α2와 상피성장인자수용체 차단항체의 저해작용을 통한 구강편평상피암 세포의 선택적 제거 (Induction of Selective Cell Death of Oral Squamous Carcinoma Cells by Integrin α2 Antibody and EGFR Antibody)

  • 최연식;김규천;윤식;황대석;김철훈;전영찬;변준호;신상훈;김욱규
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제35권3호
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    • pp.143-154
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    • 2013
  • Purpose: This study was to find efficacy of integrin alpha2 (${\alpha}_2$) and epidermal growth factor receptor (EGFR) as tumor marker of oral squamous cell carcinoma (SCC) and clarify the selective cell death effect of anti-integrin ${\alpha}_2$ and anti-EGFR on SCC cells, additionally testify conjugated gold nanoparticles (GNP) with air plasma for selective cell death of oral SCC. Methods: Expression of integrin ${\alpha}_2$, EGFR on human SCC cells (SCC25) were examined by western blot. SCC25 cells were treated with anti-integrin ${\alpha}_2$, anti-EGFR and analysed by Hemacolor staining, immunoflorescence staining, FACS flow cytometry. Conjugated GNP with integrin ${\alpha}_2$, EGFR antibody were treated by air plasma on SCC cells. Results: Integrin ${\alpha}_2$ and EGFR were over-expressed on SCC25 cells than normal lung WI-38 cells. The cell viability rate of SCC25 cells treated with anti-integrin ${\alpha}_2$, anti-EGFR was lower than WI-38 cells. The concentration changes of nucleus, releasing cytochrome c and apoptosis inducing factor (AIF) from mitochondria to cytosol were observed. The changes of proteins related with apoptosis were observed. Increase of bax, bcl-xL, activation of caspase-3, -7, -9, and fragmentation of PARP, DFF45 and decrease of lamin A/C in SCC25 cells were observed. In FACS, increase of sub-$G_1$ and S phase was observed. Cell cycle related proteins, Such as cyclin D1, cyclin dependent kinase (CDK) 4, cyclin A, cyclin E, CDK 2, p27 were decreased. After SCC25 cells treated with conjugatged GNP-Integrin ${\alpha}_2$, GNP-EGFR, additionally air plasma, the cell death rate was significantly increased. Conclusion: Integrin ${\alpha}_2$, EGFR were over-expressed in oral SCC cells. Anti-integrin ${\alpha}_2$, anti-EGFR in SCC25 cells induced apoptosis selectively. When GNP-anti integrin ${\alpha}_2$, GNP-anti EGFR were treated with air plasma on SCC25 cells, cancer cells were died more selectively. GNP-anti integrin ${\alpha}_2$, GNP-anti EGFR with air plasma could be treatment choice of oral SCC.

A $G_{4}$ Sequence within PHR1 Promoter Acts as a Gate for Cross-Talks between Damage-Signaling Pathway and Multi-Stress Response

  • Jang, Yeun-Kyu;Kim, Eun-Mi;Park, Sang-Dai
    • Animal cells and systems
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    • 제6권3호
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    • pp.271-275
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    • 2002
  • Rph1 and Gisl are damage-responsive repressors involved in PHR1 expression. They have two $C_{2}$H/ sub 2/ zinc finger motifs as putative DNA binding domains and N-terminal conserved domain with unknown function. They are also found in the human retinoblastoma binding protein 2 and the mouse jumonji- encoded protein. The repressors are able to bind to A $G_{4}$ sequence within a 39-bp sequence called upstream repressing sequence of PHR1 promoter (UR $S_{PHR1}$) responsible for the damage-response of PHR1. We report here that Rph1 is predominantly localized in the nucleus as examined by fluorescence microscopic analysis with GFP-Rph1 fusion protein. On the basis of the fact that the A $G_{4}$ sequence that is recognized by Rph1 and Gisl is also recognized by Msn2 and Msn4 in a process of stress response, we a1so tried to examine the in vivo function of A $G_{4}$ and the role of Msn2 and Msn4 in PHR1 expression. Our results demonstrate that Msn2 and Msn4 are actually required for the basal transcription of PHR1 expression but not for its damage induction. When A $G_{4}$ sequence was inserted into the minimal promoter of the cyc1-LacZ reporter, the increased LacZ expression was observed indicating its involvement in transcriptional activation. The data suggest that the A $G_{4}$ is primarily required for basal transcriptional activation of PHR1 or CYC1 promoter through the possible involvement of Msn2 and Msn4. However, since the A $G_{4}$ is also involved in the repression of PHR1 via Rphl and Gisl, it is proposed that A $G_{4}$ functions as either URS or upstream activating sequence (UAS) depending on the promoter context.t.

MicroRNA-214 Regulates the Acquired Resistance to Gefitinib via the PTEN/AKT Pathway in EGFR-mutant Cell Lines

  • Wang, Yong-Sheng;Wang, Yin-Hua;Xia, Hong-Ping;Zhou, Song-Wen;Schmid-Bindert, Gerald;Zhou, Cai-Cun
    • Asian Pacific Journal of Cancer Prevention
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    • 제13권1호
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    • pp.255-260
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    • 2012
  • Patients with non-small cell lung cancer (NSCLC) who have activating epidermal growth factor receptor (EGFR) mutations derive clinical benefit from treatment with EGFR-tyrosine kinase inhibitors ((EGFR-TKIs)-namely gefitinib and erlotinib. However, these patients eventually develop resistance to EGFR-TKIs. Despite the fact that this acquired resistance may be the result of a secondary mutation in the EGFR gene, such as T790M or amplification of the MET proto-oncogene, there are other mechanisms which need to be explored. MicroRNAs (miRs) are a class of small non-coding RNAs that play pivotal roles in tumorigenesis, tumor progression and chemo-resistance. In this study, we firstly successfully established a gefitinib resistant cell line-HCC827/GR, by exposing normal HCC827 cells (an NSCLC cell line with a 746E-750A in-frame deletion of EGFR gene) to increasing concentrations of gefitinib. Then, we found that miR-214 was significantly up-regulated in HCC827/GR. We also showed that miR-214 and PTEN were inversely expressed in HCC827/GR. Knockdown of miR-214 altered the expression of PTEN and p-AKT and re-sensitized HCC827/GR to gefitinib. Taken together, miR-214 may regulate the acquired resistance to gefitinib in HCC827 via PTEN/AKT signaling pathway. Suppression of miR-214 may thus reverse the acquired resistance to EGFR-TKIs therapy.

Synergistic Effect of Flavonoids from Artocarpus heterophyllus Heartwoods on Anticancer Activity of Cisplatin Against H460 and MCF-7 Cell Lines

  • Daud, Nik Nurul Najihah Nik Mat;Septama, Abdi Wira;Simbak, Nordin;Bakar, Nor Hidayah Abu;Rahmi, Eldiza Puji
    • Natural Product Sciences
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    • 제25권4호
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    • pp.311-316
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    • 2019
  • Artocarpus heterophyllus has been used as traditional medicine. This plant is one of the sources of flavonoid. Flavonoid compounds possessed a wide range of biological properties including anticancer. This study was performed to investigate the cytotoxic effect of flavonoids from A. heterophyllus on H460 and MCF-7 cell lines. The interaction of flavonoids and cisplatin against tested cancer cells was also evaluated. MTT assay was used to determine the cytotoxic effect of flavonoid. Isobologram analysis was selected to evaluate the synergistic effect between flavonoid and cisplatin, their interaction was then confirmed using AO/PI staining method. Amongst of flavonoid compounds, artocarpin exhibited strong cytotoxic effect on both MCF-7 and H460 cell lines with IC50 values of 12.53 ㎍/mL (28.73 μM) and 9.77 ㎍/mL (22.40 μM), respectively. This compound enhanced anticancer activity of cisplatin against H460 and MCF-7. The combination produced a synergistic effect on H460 and MCF-7 cell lines with a combination index (CI) values of 0.2 and 0.18, respectively. The AO/PI stained demonstrated that the combination of artocarpin and cisplatin caused morphological changes that indicated apoptosis. Moreover, artocarpanone also significantly increased cytotoxic effect of cisplatin compared to its single concentration with CI below than 1. This result suggested the potency of flavonoid named artocarpin to enhance the anticancer activity of cisplatin on H460 and MCF-7 cell lines.