• 제목/요약/키워드: MTT assay

검색결과 2,657건 처리시간 0.035초

팥(Phaseolus angularis) 열수 추출물의 산화적 DNA와 세포 손상 억제 효과 (Inhibitory Effect of Red Bean (Phaseolus angularis) Hot Water Extracts on Oxidative DNA and Cell Damage)

  • 박영미;정진부;서주희;임재환;정형진;서을원
    • 한국자원식물학회지
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    • 제24권2호
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    • pp.130-138
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    • 2011
  • 본 연구에서는 열수 팥 추출물이 hydroxyl 라디칼에 의해 유도되는 산화적 스트레스에 미치는 영향을 알아보기 위하여 항산화활성과 DNA 및 세포의 산화적 손상 억제 효과를 조사하였다. 팥 열수 추출물의 DPPH 라디칼과 hydroxyl 라디칼의 제거능은 다소 낮았으나, $Fe^{2+}$-chelating과 과산화수소 제거효과는 높게 나타나 활성산소의 생성을 억제하는 데 효과적인 것으로 확인되었다. 또한 팥 열수 추출물의 in vitro DNA cleavage, DNA migration 및 H2AX의 인산화비 억제활성은 높은 활성을 보여주고 있어 라디칼에 의한 DNA 손상 억제에 효과적으로 작용하였다. 또한 지질과산화와 p21의 발현율을 통해 세포의 산화적 손상에 미치는 영향을 살펴보면 지질과산화 억제능과 p21의 발현율에 매우 효과적으로 작용하고 있어 라디칼에 의한 산화적 스트레스로부터 세포를 보호할 것으로 생각된다.

자색고구마 추출물의 항산화 효과 및 신경세포 보호효과 (Antioxidant and Neuronal Cell Protective Effect of Purple Sweet Potato Extract)

  • 곽지현;최귀남;박주희;김지혜;정희록;정창호;허호진
    • 농업생명과학연구
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    • 제44권2호
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    • pp.57-66
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    • 2010
  • 자색고구마 추출물의 항산화 효과와 산화적 스트레스로 유도된 PC12 신경세포에 대한 보호효과에 대하여 연구하였다. 자색고구마 추출물의 총 페놀함량은 44.25 mg/g, monomeric anthocyanin 함량은 2,394 mg/L로 나타났다. 자색고구마 추출물의 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2'-azino-bis-(3-ethylben-zthiazoline-6-sulfonic acid) (ABTS) radical 소거활성, ferric reducing/antioxidant power (FRAP) 및 환원력은 농도 의존적으로 항산화 활성이 증가하였다. MTT {3-(4,5-dimethylthiazol-2-yl)- 2,5-diphenyl-tetrazoliumbromide} reduction assay를 이용하여 자색고구마 추출물의 신경세포 보호효과를 측정한 결과, 세포 생존율이 두드러지게 증가하는 것으로 나타났다. 산화적 스트레스는 신경세포막 손상 정도를 증가시키기 때문에 lactate dehydrogenase (LDH) release assay와 neutral red uptake assay를 이용하여 세포막 손상 보호효과를 조사한 결과 자색고구마 추출물 처리구는 대조구에 비하여 산화적 스트레스로 유도된 세포막 손상 보호효과가 농도 의존적으로 나타났다. 따라서 자색고구마 추출물은 천연 항산화 소재 및 알츠하이머성 치매와 같은 신경퇴행성 질환의 예방 소재로서의 활용 가능성이 기대된다.

MTT-assay 방법에 의한 전통수산발효식품의 암세포 증식억제작용

  • 김동수;김우제;김영명;김은미
    • 한국어업기술학회:학술대회논문집
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    • 한국어업기술학회 2002년도 추계 수산관련학회 공동학술대회발표요지집
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    • pp.92-93
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    • 2002
  • 현재, 암은 오늘날 급속한 의학의 발달에도 불구하고 아직도 우리의 생명을 위협하는 무서운 불치병으로 알려져 있다. 암의 발생은 약 75%가 공해식품 및 그릇된 식생활이 그 주된 원인으로 식원병 이라고 할만큼 식생활과 큰 관련이 있다. 암의 발생 요인에 대한 많은 연구 결과에도 불구하고 암 발생 기전에 대해서 확실히 알려져 있지 않고 치료에 있어서도 큰 효과를 발휘하지 못하고 있다. (중략)

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Synthesis and Preliminary Biological Studies of Novel Retinamide Derivatives

  • Sin, Hong-S.;Kwon, Youn-J.;Han, Hye-S.;Park, Si-H.;Park, Moong-S.;Rho, Young-S.;Um, Soo-J.
    • Bulletin of the Korean Chemical Society
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    • 제23권12호
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    • pp.1806-1810
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    • 2002
  • We have described the synthesis and biological activity of novel retinamide . The retinamide derivatives were synthesized by introducing functional side chains into the 4-hydroxy group of 4-HPR. The activities could be dependent on the side chain length, functional group, and hetero atom. The antiprolife-rative potential of the derivatives was assessed by MTT assay in HCT116 cancer cell lines.

2종 식물 추출물이 Tyrosinase 활성에 미치는 영향 (The Effects of Two Plant Extracts on Tyrosinase Activity)

  • 차은정;김안근
    • 약학회지
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    • 제47권1호
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    • pp.20-24
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    • 2003
  • The purpose of this work was to study the effect of extracts from pharbitidis seed and watermelon's inner shell on tyrosinase activity. For this purpose, the effects of plant extracts on total melanin synthesis and tyrosinase activity were measured. The results showed that the extracts effectively inhibited the tyrosinase activity and total melanin synthesis. The non-cytotoxicity of the plant extracts was confirmed by MTT assay.

Antioxidative effect of flavonol quercetin and hydrocaffeic acid against a oxidative stress on B16F10 murine melanoma cell of pretreated with hydrogen peroxide

  • Hue, Jeong-Sim;Kim, An-Keun
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.210.1-210.1
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    • 2003
  • In this study, we investigated the effect of inhibition of proliferation and antioxidant effect on B16F10 murine melanoma cell. Also, we examined by MTT(3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and intracellular reactive oxygen intermediate levels and the levels of catalase(CAT), superoxide dismutase (SOD), and glutathione peroxidase(GPX) an adaptive response of oxidative stress on B16F10 murine melanoma cell of pretreated with hydrogen peroxide. (omitted)

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Cytotoxic activity of (2S, 3R, 4E) 5-Aryl-4-pentene-1,3-diol-2-aminoueras

  • Im, C.U.;Kim, Y.H.;Jyung, M.L.;Lim, C.B.
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.248.2-248.2
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    • 2003
  • The 18 ureidoceramide derivatives had been investigated for their cytotoxic activity against HT-29 colon cancer, Caki-2 renal cancer, A549 lung cancer, PC-3 prostate cancer, HL -60 leukemia cell using MTT assay. Cytotoxic activity was strongly influenced by the substituted alkyl chain length and the optimal alkyl chain length for cytotoxicity was C9-C12. (omitted)

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Minocycline Directly Blocks Activation of Caspases After Oxidative Stress in PC12 Cells

  • Choi, Yu-Keum;Kim, Gab-Seok;Han, Byung-Hee
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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    • pp.79.2-79.2
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    • 2003
  • Minocycline is known to protect neurons from microglia-mediated cell death in many experimental models of brain diseases including ischemic stroke, Huntington's disease (HD), amyotrophic lateral sclerosis (ALS), traumatic brain injury, multiple sclerosis, and Parkinson's disease. Activation of caspase-2, 3, 8, and 9 was evident within 2-8 hr following oxidative insult with 0.5 mM hydrogen peroxide in PC12 cells. Minocycline significantly attenuated activation of these caspases up to 18 hr, resulting a significant increase in cell viability as assessed by MTT assay. (omitted)

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Anti-Inflammatory action and Cellular Toxicity of Resina Pini on Human Gingival Fibroblast

  • Suk, Kui-Duk;Suh, Young-Ah;Chang, Su-Jin
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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    • pp.157.1-157.1
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    • 2003
  • This study was carried out to evaluate the cytotoxicity and anti-inflammatory effects of Resina Pini on cultured human gingival fibloblasts. We carried out a study of cytotoxic effects of Resina Pini on cultured cells by MTT assay. Various treatments on Resina Pini reduced its toxicity on cultured cells in order of natural Resina Pini, water extracted mixture of Resina Pini and Ramus Mori Albae and recrystalized Resina Pini. However, Resina Pini showed harmless levels of cytotoxicity to cultured human gingival fibroblast. (omitted)

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Characterization of Acharan Sulfate Binding Proteins in Murine Lewis Lung Carcinoma Cell

  • Joo, Eun-Ji;Hahn, Bum-Soo;Kim, Yeong-Shik
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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    • pp.150.2-151
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    • 2003
  • We have focused on various biological activities of acharan sulfate (AS) isolated from the giant African snail Achatina fulica. In a previous study, AS showed antiangiogenic and immunomodulating activity. We also investigated antitumor activity of AS. In vitro AS had no cytotoxicity within 0 to 200 ug/ml in tumor cells such as Lewis lung carcinoma(LLC) , KM1214 (human colon cancer cell) and Caki-1 (human kidney cancer cell) by both MTT and SRB assay. In vivo AS was used to treat C57BL/6 mice bearing LLC by subscutaneous injection. (omitted)

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