Total phenolics and flavonoids, and the antioxidant capacity of plum cultivar wines (Prunus salicina L. cv. Soldam and P. salicina L. cv. Formosa) were determined using spectrophotometric methods. The total phenolic and flavanoid contents of Soldam wine were $478.4\;{\pm}\;5.6\;mg$ GAE and $202.4\;{\pm}\;7.5\;mg$ CE per L,respectively, and in Formosa wine were $200.6\;{\pm}\;7.5\;mg$ GAE and $64.4\;{\pm}\;6.8\;mg$ CE per L, respectively. Neutral and acidic phenolics in Soldam wine were extracted with ethyl acetate and 0.01 N HCl, respectively. In the 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging assay, neutral phenolics (64.5 EDA%) had $3{\sim}4$ times higher antioxidant activity than acidic phenolics (21.5 EDA%) and other related phenolic compounds such as chlorogenic acid (15.5 EDA%) and quercetin (24.6 EDA%) at a concentration of $100\;{\mu}g/mL$. The antiviral activities of neutral and acidic phenolics in Soldam wine were investigated in vitro using a virus-induced cytopathic effect (CPE) inhibition assay. Results showed that neutral and acidic phenolics at concentrations of $100\;{\mu}g/mL$ inhibited porcine epidemic diarrhea virus (PEDV) replication at rates of 78.12% and 58.37%, respectively. The inhibition rate of 10 g/mL neutral phenolics (69.42%) was higher than that of ribavirin as an antiviral reagent (57.86%). At concentrations of $100\;{\mu}g/mL$ or less, neutral and acidic phenolics of Soldam wine had no cytotoxic effect against vero cells.
This study aimed to investigate the anti-inflammatory effect of the ethanol extract from Chondrus ocellatus Holmes (COHEE) in RAW 264.7 cells and in a mouse ear edema model, by measuring the production of lipopolysaccharide-induced inflammatory response mediators. There were no cytotoxic effects on the proliferation of macrophages treated with COHEE compared with the control. COHEE inhibited the production of nitric oxide and pro-inflammatory cytokines [interleukin (IL)-6, tumor necrosis factor-α, and IL-1β]. The extract also reduced the expression of inducible nitric oxide synthase, cyclooxygenase-2, nuclear factor-κB p65, and phosphorylated mitogen-activated protein kinase in a dose-dependent manner. In the croton-oil-induced ear edema model, COHEE decreased the formation of mouse ear edema at the highest dose compared with the control, and histological analysis revealed that the epidermal/dermal tissue thickness and mast cell numbers were reduced. Therefore, these results suggest that COHEE may be a promising topical anti-inflammatory therapeutic material through its action of modulating NF-κB and the MAPK signaling pathway.
In this study, the anti-inflammatory activities of the 80% ethanol extract of Dystaenia takeshimana (DT) were investigated using Raw 264.7 cells treated with lipopolysaccharide (LPS). The effect of DT extract on the production of pro-inflammatory factors (iNOS, COX-2) in LPS-stimulated Raw 264.7 macrophages was examined. The cytotoxic effect of DT extract on macrophage cells (Raw 264.7) was examined by the 3-[4, 5-dimethyl-thiazol-2-yl]-2, 5-diphenyl-tetrazoliumbromide (MTT) assay. Treatment with DT extract showed 100% or more cell viability at the concentration $1,000{\mu}g/ml$. The inhibitory effect of DT extract on protein expression of inducible NOS (iNOS) and cyclooxygenase-2 (COX-2) was measured by western blotting using the concentrations 50, 100, and $500{\mu}g/ml$, with ${\beta}-actin$ used as the positive control. Consequently, the protein expression of iNOS, and COX-2 as observed by western blotting, was decreased by 56%, 61.6%, respectively with $500{\mu}g/ml$ DT extract. Inhibition of iNOS and COX-2 mRNA expression was measured by reverse transcription- polymerase chain reaction (PCR) using DT extract concentrations 50, 100, and $500{\mu}g/ml$, with GAPDH used as a positive control. Consequently, the mRNA expression of iNOS and COX-2 as observed by reverse-transcription-PCR was decreased by 77.9% and 83.3%, respectively at $500{\mu}g/ml$ concentration of DT extract. In conclusion, DT extract may affect inflammatory factors as a potential anti-inflammatory agent.
The effect of antioxidants on the myocardial cellular damage which occurs during reoxygenation of hypoxic myocardium was examined in isolated rat hearts. The roles of oxygen free radical and lipid peroxidation in reoxygenation injury of myocardium were also investigated. In Langenorff preparation of isolated rat heart, which was made hypoxic by perfusion with the substrate free, hypoxic cardioplegic solution ($37^{\circ}C$, 90 min), the release of cytosolic enzymes (creatine phosphokinase, lactic dehydrogenase) and a lipid peroxidation product, malondialdehyde into the coronary effluent were abruptly increased by reoxygenation. The release of enzymes was closely parallel to that of MDA. These increases of enzymes and lipid peroxidation product were suppressed to various degrees in the presence of scavengers of superoxide anion (superoxide dismutase, 10,000 U), hydrogen peroxide (catalase, 25,000 U) and hydroxyl radical (dimethyl sulfoxide, 10%). A natural antioxidant, ${\alpha}-tocopherol$(4.5 uM) and a synthetic one, butylated hydroxytoluene (2 uM) suppressed the release of cytosolic enzymes with the concomittent reduction of lipid peroxidation as measured by malondialdehyde release into the coronary effluent. These effects of antioxidants were dose dependent, and were more pronounced when the antioxidants were administered throughout hypoxic and reoxygenation periods than given during reoxygenation period only. These results suggest that cytotoxic oxygen free radicals produced in the myocardium during reoxygenation may be responsible fur the myocardial cellular injury by enhancing the lipid peroxidation of cellular membranes. Furthermore, the antioxidants may exert protective effect against reoxygenation damage of hypoxic myocardium through the inhibition of lipid peroxidation reaction.
Typha orientalis, also known as bulrush or cattail, is a perennial herbaceous plant found in freshwater wetlands and has been widely used in constructed wetlands for wastewater treatment. Recent data has revealed that SH21B, a mixture composed of seven herbs including T. orientalis, exhibited an anti-adipogenic activity by the inhibition of the expression of adipogenic regulators. However, the anti-cancer effect of T. orientalis and its molecular mechanisms remain unclear. In this study, we evaluated the anti-cancer effect and its mechanism in the methanol extract of T. orientalis (METO) on human colon carcinoma HT29 cells. It was found that METO treatment showed cytotoxic activity in a dose-dependent manner, and induced G2/M cell cycle arrest and apoptosis in HT29 cells. The induction of G2/M arrest by METO was associated with the up-regulation of phospho-Cdc2 (Tyr15), an inactive form of Cdc2 and the down-regulation of Cdc25c phosphatase. METO also induced tumor suppressor p53 and cyclin-dependent kinase inhibitor p21 (WAF1/CIP1) expression. In addition, METO-induced apoptosis was characterized by the proteolytic activation of caspase-3, degradation of poly ADP ribose polymerase (PARP), and up-regulation of death receptor FAS and pro-apoptotic Bax expression. Collectively, these results indicate that the cell cycle inhibition and apoptosis induction of METO in HT29 cells allows for the possibility of its use in anti-cancer therapies.
Purpose : We already reported the results that aqueous extract of Korean ginseng roots showed a marked cytotoxicity. In this study, we investigated whether combined ginseng product with X-irradiation increase the cytotoxicity of tumor cells than X-irradiation or not. Materials and Methods : Fifty gram of Korean ginseng powder mixed with 1 L of distilled water was extracted with reflux flask under condition of $100^{\circ}C$ for 5 hrs. This aquaous ginseng extract was filtered, centrifuged and then was freezed under condition of $-90^{\circ}C$ for 16-18 hrs. The freezing extract was dried with freeze drier, and then diluted. X-irradiation was given to tumor cells by 6 MeV linear accelerator. The cytotoxicity of ginseng in vitro was evaluated from its ability to reduce the clonogenecity of fibrosarcoma (FSa II) cells. In X-irradiation alone group, each 2, 4, 6 and 8 Gy was given to tumor cells. In X-irradiation with ginseng group, 0.2 mg/mL of ginseng extract was exposed to tumor cells for 1 hour before X-irradiation. Results : The yield for 50 g of ginseng extract which was treated with freezing drier was 3.13 g($6.3\%$). Cytotoxicity In vitro was measured as survival fraction which was judged from the curve, at ginseng concentration of 0.001, 0.01, 0.1 and 1 mg/mL were $0.89\pm0.04$, $0.86\pm0.06$, $0.73\pm0.01$ and $0.09\pm0.02$, respectively. Survival fraction at X-irradiation alone of 2, 4, 6 and 8 Gy were $0.81\pm0.07$, $0.42\pm0.08$, $0.15\pm0.02$, $0.03\pm0.01$, respectively. But, suwival fraction in combined group of X-irradiation and ginseng (0.2mg/ml) at each same radiation dose were $0.28\pm0.01$, $0.18\pm0.03$, $0.08\pm0.02$, $0.006\pm0.002$, respectively (p<0.05). Conclusion : The yield for ginseng extract which was treated with freezing drier was $6.3\%$. Cytotoxicty of Fsa 11 in combined ginseng with X-irradiation group was increased than that of X-irradition alone group, and its enhancing effect seemed to be added.
In this study, the antioxidant and cytotoxic effects and the flavonoid contents of leaf extracts from Stachys sieboldii Miq. and Lycopus lucidus Turcz. were compared. The flavonoid contents of the acetone + methylene chloride (A+M) and methanol (MeOH) extracts of L. lucidus Turcz. leaves were 55.7 and 233.2 mg/g, respectively. In a DPPH assay, A+M and MeOH extracts from L. lucidus Turcz leaves had a greater scavenging effect than those of S. sieboldii Miq. leaves (p<0.05). In an ABTS assay, MeOH extracts from S. sieboldii Miq. and L. lucidus Turcz (0.5 mg/ml concentration) leaves had scavenging effects of 85% and 91%, respectively (p<0.05), suggesting that both of the MeOH extracts had greater scavenging effects than both A+M extracts. In a 120 min ROS production assay, all tested extracts decreased the cellular ROS production induced by H2O2 compared to that produced by exposure to the extract-free control. The MeOH extract from L. lucidus Turcz leaves had a greater inhibitory effect on cellular ROS production (p<0.05). Treatment with A+M and MeOH extracts from both S. sieboldii Miq. and L. lucidus Turcz. leaves showed a dose-dependent increased cytotoxicity against the growth of AGS, HT-29 cancer cells, and HT-1080 (p<0.05). Both A+M extracts had a greater inhibitory effect on the growth of all cancer cells than both MeOH extracts. These results suggest that the MeOH extract of L. lucidus Turcz. leaves is effective in scavenging free radicals and inhibiting cellular oxidation, while the A+M extract inhibits proliferation of three types of cancer cell.
Kim, Byung-Tae;Lee, Kyung-Han;Kim, Sang-Eun;Choi, Yong;Chi, Dae-Yoon;Chung, June-Key;Lee, Myung-Chul;Koh, Chang-Soon;Chung, Hong-Keun
The Korean Journal of Nuclear Medicine
/
v.29
no.3
/
pp.332-342
/
1995
This study was designed to evaluate the effects of various factors on the therapeutic effect of the I-131 labeled anti-carcinoembryonic antigen monoclonal antibody(anti-CEA antibody). Tetrazolium-based colorimetric assay (MTT) was used to compare in vitro cytotoxicity of 3 Korean colon cancer cell lines (SNU-C2A, SNU-C4, SNU-C5) for selection of proper 2 cell lines in this study. The changes of the size of tumor which was xenografted to nude mice (balb/c nu/nu) were compared in 4 groups (group treated I-131 labeled anti-CEA antibody, group treated with non-radiolabeled anti-CEA antibody, group treated with I-131 labeled anti-human chorionic gonadotropin monoclonal antibody (anti-hCG antibody) as nonspecific antibody, and group injected with normal saline as a control). Immunohistochemical staining and in vivo autoradiography were performed after excision of the xenografted tumor. The results were as below mentioned. The in vitro cytotoxic effect of I-131 labeled anti-CEA antibody is most prominent in SNU-C5 cell line between 3 cancer cell lines. The changes of xenografted tumor size in both SNU-C4 and SNU-5S cell tumors at the thirteenth day after injection of the antibodies were smallest in the group treated with I-131 labeled anti-CEA antibody (SNU-C4/SNU-C5; 324/342%) comparing with other groups, group treated with anti-CEA antibody (622/660%), group treated with I-131 anti-hCG antibody (538/546%), and control group(1030/724%)(P<0.02 in SNU-C4 and P<0.1 in SNU-C5 at the 13th day after injection of antibodies). On the thirteenth day after injection of the antibodies nude mice were sacreficed to count the radiouptake of tumor and to check the changes of tumor size. Correlations between radiouptake and change of tumor size were calculated in each groups and significant negative correlation was only obtained in the group treated with I-131 anti-CEA antibody (p<0.05). There were no correlations between antigenic expression of carcinoembryonic antigen and distribution of anti-CEA antibody in both SNU-C4 and SNU-C5 cell tumors on immunoperoxidase staining. On in vivo autoradiography the distributions of anti-CEA antibody were heterogeneous and the intensities of binding were various in SNU-C4 and SNU-C5 cell tumors. It is concluded that I-131 labeled tumor-specific monoclonal antibody, anti-CEA antibody is effective in suppressing the xenografted tumor growth and the effect is influenced by sensitivity of tumor cell itself to the radiolabeled antibody and other local factors instead of specificity of antibody.
Two kinds of Korean rice-wine (Yakju) with different process and ingredients, and Japanese rice-wine (Sake) were chosen for this study, and throughly dried and solubilized in water or cell culture medium. In vitro cytotoxicity assays of the solubilized wine solids exhibited that maximum dilution factors for inhibition of B 16BL6 mouse melanoma cell growth were 16X for herbal medicine-added rice-wine (Korean rice-wine I) and typical Korean rice-wine (Korean rice-wine II), and 8X for Japanese rice-wine. Their cytotoxic effects on HRT18 human colon adenocarcinoma cells were even lower than those on B16BL6 cells. The morphology of the tumor cells were changed by addition of the solubilized wine solids. Inhibitory effect of the rice-wine on in vivo tumor growth and metastasis were monitored after implantation of B16BL6 cells into C57BL/6 mice with daily feeding the solubilized wine solids. Compared to non-fed control groups, B16BL6 tumor growth and metastasis to lung were clearly inhibited by feeding the wine solids, in order of Korean rice-wine I > Korean rice-wine II > Japanese rice-wine. The data of in vitro cytotoxicity and the cell shape changes indicate that the inhibitory effect of tumor progression may be attributed to tumor cell differentiation or immune stimulation induced by certain components in the rice-wine, rather than direct cytotoxicity of the components.
Seo, Bo-Young;Jung, Eun-Sil;Kim, Ju-Young;Park, Hae-Ryong;Lee, Seung-Cheol;Park, Eun-Ju
Applied Biological Chemistry
/
v.49
no.3
/
pp.227-232
/
2006
Styela clava (also called as rough sea squirt or leathery tunicate) is regarded as native to the northwest Pacific region including Korea and widely distributed in parts of northwestern Europe, North America and Australia. To evaluate Styela clava as a potential bioactive agent, the antioxidant activity of aceton extracts from Styela clava (whole, substance and tunic) was tested by measuring inhibitory effect of $H_2O_2$ induced DNA damage using comet assay. Also, anticancer activity on human colon cancer cell (HT-29) was investigated by MTT reduction assay. The $200\;{\mu}M$$H_2O_2$ induced DNA damage was inhibited with Styela clava aceton extract in dose dependent manner in human leukocytes. The maximum inhibition was by 62.8, 62.1 and 78.3% at the concentration of $50\;{\mu}g/ml$ of whole, substance and tunic extracts, respectively. The aceton extracts from S. clava were also found to inhibit the growth of human colon cancer cell. The cell proliferation rates decreased to 26.9, 30.6 and 12.0% at the concentration of $500\;{\mu}g/ml$ of whole, substance and tunic extracts, respectively. These results support that aceton extracts from S. clava may be a potential candidate as a possible antimutagenic and chemotherapeutic agent.
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