• 제목/요약/키워드: Cytotoxicity

검색결과 4,596건 처리시간 0.125초

An Additional Mechanism for the Cytotoxicity of 2-Chloroethylethyl Sulfide in Spleen Lymphocytes; Lysosomal Labilization

  • Choi, Dae-Sung;Shin, Sung-Ho;Kim, Yun-Bae;Cha, Seung-Hee;Sok, Dai-Eun
    • BMB Reports
    • /
    • 제28권1호
    • /
    • pp.79-82
    • /
    • 1995
  • Exposure of spleen lymphocytes to 2-chloroethylethyl sulfide (CEES) leads to a reduction of the intracellular ATP level, followed by a decrease in cell viability. Addition of nicotinamide, an inhibitor of poly(ADP-ribose) polymerase (PADPRP), restores both ATP level and viability, indicating that an activation of PADPRP is responsible for the cytotoxicity of CEES. The involvement of a $Ca^{2+}$-mediated process in cytotoxicity is suggested. Verapamil, EGTA, trifluoperazine, and butacaine exhibit a partial protection (20 to 58%) against the cytotoxicity of CEES. Investigation of the causative role of proteolytic degradation in cell death indicate that pepstatin and leupeptin exert a substantial protective effect (60 to 70%), suggesting the involvement of lysosomal destabilization in CEES-induced cytotoxicity. Also, lysosomotropic agents markedly decrease the cytotoxicity. Lysosomal labilization may be a mechanism for the cytotoxicity of CEES.

  • PDF

Menadione에 의한 흰쥐 혈소판 세포독성에서 nitric oxide의 역할 (The Role of Nitric Oxide in Menadione-Induced Cytotoxicity in Rat Platelets)

  • 승상애;김대병;윤여표;정진호
    • Toxicological Research
    • /
    • 제11권2호
    • /
    • pp.303-308
    • /
    • 1995
  • Nitric oxide, a physiological transmitter, is reported to mediate cellular injury in various tissues. Its reactivity to free radical is believed to be one of the reasons for its involvement in cytotoxicity. Menadione, a representative quinone, is cytotoxic to several cell systems including isolated hepatocyte, endothelial cell and red blood cells. Its toxic mechanism is related to oxidative stress, mediated by toxic free radicals. Our previous studies demonstrated that menadione induced cell lysis and increase of oxygen consumption in platelets. It has been reported that platelets have nitric oxide producing enzyme, nitric oxide synthase. Thus, we have investigated to manifest the role of nitric oxide.in menadione-induced cytotoxicity in rat platelets. Menadione induced cytotoxicity in platelets was unaffected by $N^G$-nitro-arginine methyl ester (L-NAME), selective and competitive inhibitor of nitric oxide synthase. We also invesitgated the role of extracellular nitric oxide in menadione-induced cytotoxicity of platelets by addition with sodium nitroprusside (SNP). SNP did not affect platelet cytotoxicity by menadione. These results suggested that nitric oxide which was generated endogeneously or exogeneously might have a negligible role in menadione-induced cytotoxicity in rat platelets.

  • PDF

금속매염제인 초산구리의 세포독성에 대한 자귀나무잎 추출물의 보호 효과 (Protective Effect of Albizzia julibrissin Leaf Extract on the Cytotoxicity Induced by Cupric Acetate Metallic Mordant)

  • 정정화;임요섭;서영미
    • 한국환경보건학회지
    • /
    • 제45권5호
    • /
    • pp.520-528
    • /
    • 2019
  • Objectives: This study assessed the cytotoxicity of the metallic mordant cupric acetate (CA) and the protective effect of Albizzia julibrissin (AJ) leaf extract on CA-induced cytotoxicity in NIH3T3 fibroblasts. Methods: For this study, cell viability and antioxidative effects such as the inhibitory activity of lipid peroxidation (LP) and superoxide anion-radical (SAR) scavenging activity were assessed. Results: CA significantly decreased cell viability in a dose-dependent manner, and the $XTT_{50}$ value was measured as $55.0{\mu}M$ of CA. The cytotoxicity of CA was determined as highly toxic by Borenfreund and Puerner's toxic criteria. The catalase antioxidant significantly increased cell viability diminished by CA-induced cytotoxicity in these cultures. Regarding the protective effect of AJ leaf extract on CA-induced cytotoxicity, AJ leaf extract remarkably increased the SAR scavenging ability and the inhibitory ability of LP. From these findings, it is suggested that oxidative stress is involved in the cytotoxicity of CA, and AJ leaf extract effectively protected CA-induced cytotoxicity via antioxidative effects. Conclusions: Natural resources like AJ leaf extract may be a putative therapeutic agent for treatment or alleviation of the toxicity induced by CA metallic mordant.

제조가 마우스 Natural killer 세포(細胞) 활성(活性)에 미치는 영향(影響) (The effect of Holotrichia on Natural killer Cell Activity in Mice)

  • 김기열;김종대;정지천;남경수
    • 대한한의학회지
    • /
    • 제19권2호
    • /
    • pp.313-325
    • /
    • 1998
  • The effect of Holotrichia on natural killer cell activity in normal mouse were studied. 1. The oral administration of Holotrichia increased spleen weight about 21.1% and also cell numbers of spleen compared to control mice group. 2. The cytotoxicity of effector cell was most effectively induced in a ratio of 50 : 1(effector/target cell). 3. Cytotoxicity of effector cells was. increased about 24% as compared with control group in in vivo test. 4. On the other hand, the administration of Holotrichia original solution showed significant increase the cytotoxicity. The cytotoxicity was increased concentration dependently. 5. The cytotoxicity by $^{3}H-thymidine$ incorporation assay showed similar effect with LDH enzyme method. 6. In the purified NK cells, the cytotoxicity was increased about 31% as compared with control group in in vivo system and the ratio of cytotoxicity was generally more increased than that of partially purified NK cell. 7. In vitro experimet of the purified NK cells, the cytotoxicity was increased 11.8% as compared with control group and the ratio of cytotoxicity was also more increased than that of partially purified NK cell. These results suggest that Holotrichia is administrated to mice with malignant tumors, the increase of NK cell activity may occur and affect tumor cells.

  • PDF

Protective Effect of Aster tataricus L. Extract on the Dermal Cytotoxicity Induced by Sodium Bromate, Oxidant of Hair Dye

  • Chung, Jung-Hwa;Lee, Gyoung-Wan;Seo, Young-Mi
    • 대한의생명과학회지
    • /
    • 제25권4호
    • /
    • pp.348-356
    • /
    • 2019
  • This study evaluated the dermal cytotoxicity of sodium bromate (NaBrO3) and the protective effect of Aster tataricus L. (AT) extract against NaBrO3-induced cytotoxicity in the cultured NIH3T3 fibroblasts. For this study, it was done the antioxidative effects such as electron donating (ED) activity and lipid peroxidation (LP) activity as well as cell viability. NaBrO3 significantly decreased cell viability in a dose-dependent manner and its XTT50 value was measured at a concentration of 54.4 μM in these cultures. The cytotoxicity of NaBrO3 was determined as highly-toxic by Borenfreund and Puerner's toxic criteria. The quercetin, antioxidant significantly increased cell viability against NaBrO3-induced cytotoxicity. Regarding the protective effect of Aster tataricus (AT) L. extract on NaBrO3-induced cytotoxicity, AT extract significantly increased the cell viability, the ED ability and the inhibitory ability of LP. From these findings, it suggested that the oxidative stress is involved in the cytotoxicity of NaBrO3, and AT extract effectively protected NaBrO3-induced cytotoxicity by antioxidative effects. Conclusively, the natural component like AT extract may be a putative therapeutic agent for the diminution or treatment of the cytotoxicity correlated with oxidative stress like hair dye component, NaBrO3.

근관 충전용 시멘트의 치주인대 섬유아세포 독성에 관한 연구 (THE CYTOTOXIC EFFECTS OF ROOT CANAL SEALERS ON FIBROBLASTS IN HUMAN PERIODONTAL LIGAMENT)

  • 이광희;최호영;민병순;박상진;최기운
    • Restorative Dentistry and Endodontics
    • /
    • 제18권1호
    • /
    • pp.156-172
    • /
    • 1993
  • The purpose of this study was to evaluate for the cytotoxicity of root canal sealers - Tubliseal, N2, AH26, and Sealapex - on fibroblasts cultivated from human periodontal ligament. Succinate dehydrogenase activity test and $^{51}Cr$ release test were performed to evaluate the shortterm cytotoxicity. According to l,3 and 6 days vital cell count and $^{14}C$-leucine incorporation rate to fibroblasts were evaluated. The results of this study were as follows: 1. In the test of SDH activity by millipore filter method, Sealapex showed mild cytotoxicity but Tubliseal, N2 and AH26 showed severe cytotoxicity. 2. In $^{51}Cr$ release test, Tubliseal was the most cytotoxic sealer tested, and rank ordered the relative cytotoxicity of the other sealers tested as follows: AH26, N2, Sealapex. 3. In the test of viable cell count, cytotoxicity in Tubliseal was continued because vital cell number reduced with time. Because vital cell was not showed in N2 and AH26 at 1 day, it was recognized that N2 and AH26 exhibited severe cytotoxicity. In Sealapex, vital cell number increased remarkably with time, so it showed that cytotoxicity decreased with time. 4. In $^{14}C$-leucine incorporation rate test, protein sythesis was not produced in Tubliseal, N2 and AH26 after 3 days, it showed that cytotoxicity in Tubliseal, N2 and AH26 was severe. Although protein synthesis in Sealapex decreased with time, it continued after 6 days. Therefore Sealapex has been exhibited mild cytotoxicity.

  • PDF

불소화합물의 골육종 및 구강암 세포주에 대한 독성의 비교분석 (Comparative Analysis of Cytotoxicity of Fluoride Compounds on Oral Cancer and Osteosarcoma Cells)

  • 송제선;이백수;김정희
    • Environmental Analysis Health and Toxicology
    • /
    • 제14권3호
    • /
    • pp.113-120
    • /
    • 1999
  • Fluorination of drinking water has been used world widely to reduce the incidence of caries. Recently, contradictory results on the cytotoxicity of fluoride compounds are reported. In addition, there are attempts to use fluorosilicate for fluorination of drinking water in Korea, therefore, we tried to analyze the cytotoxicity of fluoride compounds on oral epidermoid carcinoma (KB and A253) and osteosarcoma (HOS and MG-63) cells in this study. We treated cells with 0, 10, 50 and 250 ppm of fluorosilicic acid (domestic or from Fluka, F$\_$6/H$_2$Si), sodium fluorosilicate (F$\_$6/Na$_2$Si), sodium fluoroacetate (FCH$_2$CO$_2$Na), sodium fluoride (NaF) or potassium fluoride(KF) and measured the relative cell survival by MTT assay. At the concentration of < 10ppm, no significant cytotoxicity was observed. At 50 ppm, each cells revealed different response to fluoride treatment. Among cells used in this study, MG-63 was the most resistant to fluoride treatment. Comparable toxicity data from domestic and imported fluorosilicic acids were obtained. When we compared the relative cytotoxicity of fluoride compounds against their fluoride contents, the differences in relative cell survival were smaller. Most of cells showed < 20% of survival at 250 ppm. In order to analyze the pH dependence of the cytotoxicity of fluorosilicates, the pH of cell culture media containing fluorosilicate was adjusted to 7.4 or 6.5 and the relative cytotoxicity was measured. At lower pH, about 10% higher cytotoxicity was obtained. Thus, our data suggested that the toxicity of domestic fluorosilicic acid was similar to that of fluorosilicic acid from Fluka, and the cytotoxicity of fluoride compounds was dependent on the relative content of fluoride and pH.

  • PDF

The Antioxidative Effect of Eclipta prostrata L. Extract on Cultured NIH3T3 Fibroblasts Injured by Manganese-Induced Cytotoxicity

  • Lee, Sang-Hee;Jung, In-Ju;Jang, Hyesook
    • 대한의생명과학회지
    • /
    • 제24권4호
    • /
    • pp.357-364
    • /
    • 2018
  • Manganese (Mn) is used as main materials in various chemical processes of industry, but it suggested that Mn brings about its toxicant by fume or dust through respiratory system and skin barrier. Mn toxicant induces the loss of mental health and life quality by cerebrovascular and skin diseases. Nevertheless, it lefts much unknown on the mechanism and the effectively therapeutic methods about Mn toxicant. Therefore, this study was evaluated the cytotoxicity induced by manganese dioxide ($MnO_2$) in cultured NIH3T3 fibroblasts, and also, the correlation between $MnO_2$-induced cytotoxicity and oxidative stress was examined. While, the effect of Eclipta prostrata L. (EP) extract belong to Compositae was assessed against $MnO_2$-induced cytotoxicity in the view of antioxidative effect for searching the natural resources mitigating or preventing the $MnO_2$-induced cytotoxicity. In this study, $MnO_2$-induced cytotoxicity was revealed as mid-toxic by Borenfreud and Puerner's toxic criteria, and catalase (CAT), an antioxidant prevented $MnO_2$-induced cytotoxicity by the remarkable increase of cell viability in these cultures. While, in the protective effect of EP extract on $MnO_2$-induced cytotoxicity, EP extract effectively prevented the cytotoxicity induced by $MnO_2$ via antioxidative effects such as xanthine oxidase (XO) inhibitory ability and DPPH-radical scavenging ability. From the above results, EP extract showed the effective prevention against $MnO_2$-induced cytotoxicity correlated with oxidative stress by antioxidative effects. Conclusively, this study may be useful to research or development the alternatively therapeutic agent from natural resources like EP extract for the treatment of diseases resulted in oxidative stress.

Synthesis of 2,4,6-Tripyridyl Pyridines, and Evaluation of Their Antitumor Cytotoxicity, Topoisomerase I and II Inhibitory Activity, and Structure-activity Relationship

  • Jeong, Byeong-Seon;Choi, Ho-Young;Kwak, Young-Shin;Lee, Eung-Seok
    • Bulletin of the Korean Chemical Society
    • /
    • 제32권10호
    • /
    • pp.3566-3570
    • /
    • 2011
  • A series of 2,4,6-tripyridyl pyridines were synthesized, and evaluated for their antitumor cytotoxicity, topoisomerase I and II inhibitory activity. From the eighteen prepared compounds, compounds 10-12 have shown better or similar cytotoxicity against several human cancer cell lines as compared to 2,2':6',2"-terpyridine and doxorubicin. Especially, compound 10 exhibited the most potent cytotoxicity better than positive controls. Structure-activity relationship study indicated that 2,2':6',2"-terpyridine skeleton has an important role in displaying significant cytotoxicity against several human cancer cell lines.

곰취 추출물의 세포독성 효과 (Cytotoxicity of Ligularia fischeri Extracts)

  • 함승시;이상영;오덕환;정성원;김상헌;정차권;강일준
    • 한국식품영양과학회지
    • /
    • 제27권5호
    • /
    • pp.987-992
    • /
    • 1998
  • This study was investigated to observe the cytotoxicity effect of Ligularia fischeri extracts against cancer cell lines including human lung carcinoma(A549), human cervix epitheloid carcinoma(HeLa) and human hepatocellular carcinoma(HepG2) using SRB(sulforhodamine B) method. The ethanol and methanol extracts of 1$\mu\textrm{g}$/${mu}ell$ showed approximately 79.2% and 86.4% cytotoxicity effects on HepG2 cell line and the ethyl acetate fracton fractionated from ethanol extracts showed the strongest cytotoxicity effect with 94% inhibition. The inhibitory effect of ethanol extract on HeLa cell line was somewhat low with 50~56% inhibition, but ethyl acetate fraction showed higher cytotoxicity effect with 91% and 91.9% inhibition on the HeLa and A549 cell line. On the contrary, the ethanol and methanol extracts showed the lower inhibition effects on the normal liver cell, WRL68, compared to human cancer cell lines.

  • PDF