• Title/Summary/Keyword: 세포독성시험

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Mutagenicity Studies of the Herbicide Methiozolin (제초제 Methiozolin의 유전독성평가)

  • Koo, Suk-Jin;Lee, Zong-Yun;Park, Cheol-Beom
    • The Korean Journal of Pesticide Science
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    • v.15 no.4
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    • pp.374-382
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    • 2011
  • We investigated the mutagenicity of methiozolin, newly developed herbicide, in vitro reverse mutation test using Salmonella typhimurium and Escherichia coli, chromosome aberration test using chinese hamster lung (CHL) cells and in vivo micronucleus test of mice. In the reverse mutation test, the methiozolin did not induce mutagenicity in Salmonella typhimurium TA98, TA100, TA1535, TA1537, Escherichia coli WP2uvrA with and without metabolic activation at $5,000{\mu}g$/plate. In the chromosome aberration test, the results showed no incidence of increased structural and numerical chromosome abberrations at any doses tested (80, 40, $20{\mu}g$/mL). In micronucleous test, the ratio of micronuclei was measured in polychromatic erythrocytes with treated methiozolin for ICR mice. No incidence of increased micronuclei were observed in polychromatic erythrocytes (1,500, 1,000, 500 mg/kg). Based on these results, we concluded that methiozolin has no mutagenic toxicity in vitro and in vivo systems.

Evaluation of Phototoxicity for Cosmetics and Alternative Method (화장품 광독성 평가와 동물대체시험법)

  • Lee, Jong-Kwon;Sin, Ji-Soon;Kim, Jin-Ho;Eom, Jun-Ho;Kim, Hyung-Soo;Park, Kui-Lea
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.31 no.3 s.52
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    • pp.245-251
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    • 2005
  • Safety is one of the key issue in the regulation of cosmetics. Cosmetic Act deals with it in Korea. The guidance for the testing cosmetic ingredients and their safety evaluation are prepared by Korea Food and Drug Administration. Ultraviolet radiation could Induce skin damage, edema, erythema, photoaging, immune dysfunction and skin cancer. Ultraviolet radiation is classified as Group 2A(probably carcinogenic to humans) by International Agenry for Reaserch on Cancer(IARC). The in vitro methodologies for evaluating the toxic potential of ingredients reported in the literature have not yet been sufficiently validated for use in areas other than the study for mutagenicity/genotoxicity, for pre-screening for severe irritancy, for screening of phototoxicity and for evaluating the percutaneous absorption. The 3T3 neutral red uptake photoxicity test (3T3 NRU PT) was accepted as OECD toxicity guideline in 2002. The 3T3 NRU PT is an in vitro method based on a comparison of the cytotoxicitv of a chemical when tested in the presence and in the absence of exposure to a non-cytotoxic dose of UVA/visible light.

Genotoxicological Safety of Hot Water Extracts of the γ-Irradiated Astragali Radix, Atractylodes Rhizoma, and Cimicifugae Rhizoma in Vitro (감마선 조사 황기, 백출 및 승마 열수 추출물의 in vitro 유전독성학적 안전성 평가)

  • 박혜란;함연호;정우희;정일윤;조성기
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.31 no.5
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    • pp.910-916
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    • 2002
  • As the utilization of medicinal herbs in food and bio-industry increases, safe hygienic technologies for them are demanded. To consider the possibility of application of radiation technology for this purpose, the genotoxi-cological safety of three r -irradiated medicinal herbs were studied. Astragali Radix, Atractylodes Rhizoma and Cimicifugae Rhizoma were irradiated at 10 kGy, and then were extracted with hot water. The genotoxicity of the extracts was examined in two short-term in vitro tests: (1) Salmonella reversion assay (Ames test) in strains of TA98 and TA100; (2) Micronucleus test in cultured Chinese hamster ovary (CHO) cells. The extract was treated at maximum doses of 5 mg/plate in Salmonella reversion assay, and 1 mg/mL in micronucleus test where growth of CHO cells was inhibited by 50%. In Salmonella reversion assay with or without metabolic activation, both ex-tracts of irradiated and non-irradiated herbs showed no significant differences in formation of revertant colonies compared with the negative control. And also in micronucleus test, the incidences of micronucleus in CHO cells cultured with extracts of irradiated herbs were almost same as negative control in less than 3%. These results of two in vitro tests suggest that ${\gamma}$-irradiated herbs do not show mutagenicity and cytogenetic toxicity. Further tests of in vivo genotoxicity and chronic toxicity are needed to ascertain the safety of ${\gamma}$-irradiated herbs.

In vitro cytotoxicity of four kinds orthodontic band cements (수종 치과 교정용 밴드 시멘트의 세포독성에 관한 실험적 연구)

  • Lee, Won-Chul;Park, Soo-Byung
    • The korean journal of orthodontics
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    • v.34 no.4 s.105
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    • pp.351-362
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    • 2004
  • Orthodontic band cements are widely used in the fields of orthodontics, but they are commonly known as cytotoxic material. Within an oral cavity several ions and components are released from orthodontic band cements, thus causing inflammation or injury to the Periodontal tissue. Therefore, it is very important to estimate the biocompatibility of orthodontic band cements. The purpose of this study was to assess the cytotoxic effect of orthodontic band cements to HGF cells. A zinc phosphate cement, a glass ionomer, a resin modified glass ionomer, and compomer were used to evaluate three cytotoxicity assays: cell proliferation assay, MTT assay, and agar ovelay assay The results were as follows: 1. In the cell proliferation assay, Gl>ZPC, RMGI, RMGI24, GI24>compomer24, ZPC24, compomer>metal ring lined up in order of cytotoxicity 2. In the MTT assay, GI>ZPC, RMGI>GI24>ZPC24, compomer, metal ring, RMGI24, compomer24 lined up in order of cytotoxicity. 3. In the agar overlay test, GI>GI24, ZPC, ZPC24, RMGI>RMGI24, compomer, compomer24, metal ring lined up in order of cytotoxicity.

The Content of Amino Acids and Anti-inflammatory Effect of Lentinula edodes Syrup by Different Malt Concentrations (맥아 첨가비율을 달리한 표고당화액의 세포독성, 항염증효과 및 아미노산 함량)

  • Ha, Neul-I;Bak, Ok Ran;Kim, Kyung Je;Jin, Seong Woo;Koh, Young Woo;Im, Seung Bin;Jeong, Hee Gyeong;Seo, Kyoungsun
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2019.04a
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    • pp.104-104
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    • 2019
  • 표고(Lentinula edodes)에 다량 함유되어 있는 아미노산은 면역효과와 밀접한 관련이 있는 것으로 알려져 있다. 표고 특유의 향미에 대한 소비자들의 선호도가 상이하여, 표고를 맥아로 당화하여 소비자들의 섭취 편이성을 향상시키고, 아미노산을 포함한 당화액을 제조하여 면역효과가 증강된 제품을 개발하고자 본 연구를 수행하였다. 또한 버섯류를 비롯한 담자균류에는 다양한 약효성분이 함유되어 있어 민간에서도 자주 사용된 기록이 있다. 최근 고등담자균류인 버섯의 성분 및 유용성에 관심이 크게 증가하고 있는 추세이며, 이에 따라 버섯류에 대한 식품학적 및 약리학적 측면에서 연구가 활발히 진행되고 있다. 표고(L.edodes)와 당화효소로 사용한 맥아의 비율에 따라 A (표고 1 kg : 맥아 50 g), B (표고 1 kg : 맥아 100 g), C (표고 1 kg : 맥아 200 g), D (표고 1 kg : 맥아 300 g), E (표고 1 kg : 맥아 300 g) 5개의 시험구를 설정하였으며, 제조된 표고당화액을 농축 후 동결건조 하여 분말로 분쇄 후 시료로 사용하였다. 표고당화액의 면역효과를 검증하고자, Raw 264.7에 표고당화추출분말 A, B, C, D, E를 각각 10, 50, 100 및 $500{\mu}g/mL$의 농도로 처리하여 각 시료에 대한 세포 독성과 항염증효과를 확인하였다. 세포독성 시험결과, E 시험구의 경우 $100{\mu}g/mL$의 농도에서 75.3%, $500{\mu}g/mL$의 농도에서 66.3%의 세포생존율을 나타내 독성을 보였다. 또한 A, B, D를 각각 $500{\mu}g/mL$의 농도로 처리 했을 때, 94.1%, 83.1%, 80.2%의 NO 생성율을 나타내어 E 시험구를 제외하고는 세포독성이 없는 것으로 확인되었다. 표고당화추출분말의 구성아미노산 함량은 C 시험구에서 19,699.01 mg%로 가장 높게 나타났으며, A 시험구에서 17,231.14 mg%, B 시험구에서 17,152.38 mg%순으로 높게 나타났다. E 시험구에서 13,367.98 mg%로 가장 낮게 나타났다. 모든 표고당화추출분말에서 총 16종의 유리아미노산 이 검출 되었으며, C 시험구에서 2,562.06 mg%로 가장 높게 나타났고, B 시험구에서 2,243.16 mg%, D 시험구에서 1,895.29 mg%, A 시험구에서 1,672.82 mg%순으로 높게 나타났다.

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Cytotoxicity(MTT) evaluation of dental instruments made of polymers (치과용 폴리머 기구의 세포독성(MTT) 평가)

  • Choi, Eun-Mi
    • Journal of the Korea Convergence Society
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    • v.12 no.8
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    • pp.187-195
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    • 2021
  • In order to assess the cell toxicity of 10 instruments made of polymers, the MTT assay which utilizes the L-929 cell was selected. Specimens were eluted at a temperature of 37℃ for 24 hours at a rate of 4g per 20mL, RPMI 1640, and then was positively and negatively contrasted with a control test solution, in accordance with the Notification No. 2020-12 Protocols of Medical Apparatus Biological Safety from the Ministry of Drug and Food Safety. As a result of 24 hours of incubation in 37℃, 5% CO2 Incubator and assessment using an ELISA reader, the results of Intraoral camera indiciated a cellular viability of more than 70% at a 50% eluate. But, the Plastic impression tray, 3D printing tweezer, Impression disposable syringe, Dental floss holder, Hand implant scaler, Surgical retractor, Oral scanner tip, Dental mirror, and the Water pick tip all reported a cellular viability of more than 70% at a 100% eluate, which indicates that do not exhibit cytotoxicity, thus allowing it to be used in contact with the mucous membrane of the oral cavity.

In vitro Cytotoxicity Evaluation of Polydimethylsiloxane as a Biosensor Coating Material (바이오센서 코팅용 Polydimethylsiloxane의 생체외 세포독성 평가)

  • Park, Subeom;Lee, Jonghwan;Na, Kyunga;Jung, Jaeyeon;Kim, Myungjin;Park, Sungjae;Hyun, Jinho
    • Journal of Adhesion and Interface
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    • v.10 no.2
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    • pp.77-83
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    • 2009
  • PDMS was selected for a coating material of implantable biosensors and the cytotoxicity of extracts released from a polymer was evaluated using ISO 10993-5, Biological evaluation of medical devices-Part 5: Tests for in vitro cytotoxicity. Organo-tin was used as a positive control and a medium without serum was used as a negative control. Materials extract were prepared by incubating specimens in RPMI medium without serum ($125{\mu}L/cm^2$) for 24 h, 1 week and 6 weeks at $38^{\circ}C$. The evaluation of cytotoxicity was performed by two different methods : 1) seeding cells with extracts at the beginning 2) incubating extracts with cell sheets already formed on the plate. Both cell morphology and MTT numerical data were shown for the confirmation of cytotoxicity and cell spreading on the surface of PDMS.

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Evaluating the Micronucleus Induction Potential for the Genotoxicity Assay Using the Human Skin Model, KeraSkinTM (인공피부모델 KeraSkinTM을 이용한 유전독성 평가)

  • Lee, Su-Hyon;Jung, Haeng-Sun;Kim, Seol-Yeong;Kim, Hye Soo;Lim, Kyung-Min;Chung, Young-Shin;Choe, Tae-Boo
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.42 no.3
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    • pp.211-216
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    • 2016
  • Micronucleus test is genotoxicity assay for detection of micronuclei in the cytoplasm of interphase cells. The reduction and replacement of in vivo toxicity testing on animals require the development of in vitro models to predict the genotoxicity or other tests for cosmetic products. In this study, we evaluated a genotoxicity assay for topically applied chemicals using a three-dimensional human reconstructed skin model, KeraSkin$^{TM}$. Two genotoxins, mitomycin C (MMC) and methyl methanesulfonate (MMS), induced significant dose-related increases in cytotoxicity and micronuclei induction in the skin model. In contrast, two non-genotoxins, 4-nitrophenol (4-NP) and trichloroethylene (TCE), induced cytotoxicity but not micronucleus formation. In conclusion, micronucleus test using human skin model may be useful for predicting in vitro genotoxic potentials of cosmetic products.

신규 항암제 DA-125의 급성 및 특수독성 연구

  • 하광원;김부영;박정식;안병옥
    • Proceedings of the Korean Society of Applied Pharmacology
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    • 1993.04a
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    • pp.37-37
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    • 1993
  • 1) 급성독성시험: 랫드와 마우스 공히 투여후 5~6일에 농도의존적의 강한 독성이 발현 되었으며 표적장기로는 소화기계, 임파계, 조혈기계 등으로 나타났다. 랫드에서의 반수 치사량은 암수 각각 771.9(505.6~1178.4)mg/kg과 479.8(302.7~760.4)mg/kg이었으며 마우스에서는 암수 각각 527.4(393.7~701.1)mg/kg과 463.0(308.8~694.2)mg/kg 이었다. 2) 유전독성: S. typhimurium을 이용한 복귀돌연변이시험, CHL세포를 이용한 염색체이상 시험, 마우스에서의 소핵시험결과 DA-125는 돌연변이 유발능을 갖는 것으로 나타났다. 3) 국소자극성: 혈관주위주사에 의한 피부자극성 시험결과 DA-125는 adriamycin의 3배 용량에서 궤양, 괴사등 유사한 병변이 유발되었으나, 병변회복은 adriamycin에 비해 빠른 것으로 나타났다. 또한 토끼에서의 안점막자극시험 결과에서 DA-125는 실제적으로 자극이 없는 것으로 나타났다.

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Genotoxicological Safety of Gamma-Irradiated Salted and Fermented Anchovy Sauce (감마선 조사된 멸치액젓의 유전독성학적 안전성 평가)

  • 육홍선;차보숙;김동호;이주운;변명우
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.33 no.7
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    • pp.1192-1200
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    • 2004
  • Gamma irradiations at 5 or 10 kGy were applied to salted and fermented anchovy sauce, for improving the hygiene Quality and evaluating the genotoxicological safety. In vitro genotoxicological safety of irradiated sauces was evaluated by Salmonella Typhimurium (TA98, TA100, TAI535 and TAI537) and E. coli WP2 uvrA, reversion assay, SOS chromotest (Escherichia coli PQ37), and chromosome aberration test (Chinese hamster lung fibroblast cells) in the absence or presence of an exogenous metabolizing system (S9 mix). The gamma-irradiated samples were not significantly different from nonirradiated-control for three in vitro tests (p<0.05). :In vivo micronucleus test using ICR mice (male) was not significantly different from the control at p<0.05. The salted and fermented anchovy sauce exposed to 5 or 10 kGy-gamma ray revealed negative results in these three in vitro mutagenetic tests and in vivo micronucleus test upto 50,000 $\mu$g/plate, respectively. The results indicated that 5 or 10 kGy gamma-irradiated salted and fermented anchovy sauces did not show any mutagenicity.