Park, Min Jeong;Kim, Junse;Kong, Chang-Suk;Seo, Youngwan
Ocean and Polar Research
/
v.41
no.2
/
pp.79-88
/
2019
In this study, the inhibitory effect of Atriplex gmelinii C. A. Mey. against the activity of MMP-2 and MMP-9 secreted from phorbol-12-myristate-13-acetate (PMA)-stimulated HT-1080 cells was evaluated by gelatin zymography and enzyme-linked immunosorbent assay (ELISA), reverse transcription polymerase-chain reaction (RT-PCR), and Western blot assay. Specimens of the halophyte A. gmelinii were extracted twice for 24 hr with methylene chloride ($CH_2Cl_2$), and then twice with methanol (MeOH), in turn. Each extract significantly inhibited the enzymatic activities in gelatin zymography and MMP ELISA kit, and expression of MMP-2 and 9 in mRNA and protein levels. Two crude extracts were combined and then the combined crude extracts were fractionated into n-hexane, 85% aqueous methanol (85% aq.MeOH), n-butanol (n-BuOH), and water ($H_2O$) fractions, according to solvent polarity. Among solvent-partitioned fractions, the 85% aq.MeOH fraction showed the strongest inhibitory effect against MMP-2 and -9 in gelatin zymography and MMP ELISA kit. In RT-PCR, all solvent-partitioned fractions significantly suppressed mRNA expression of MMP-2 and -9. On the other hand, in Western blot assay, all solvent-partitioned fractions except $H_2O$ significantly reduced expression levels of protein. HT 1080 cell migration was most significantly inhibited by the n-BuOH fraction followed by the 85% aq.MeOH and $H_2O$ fractions. These results suggest that A. gmelinii could be used as a potential source to inhibit tumor cell metastasis.
Objectives : The present study was carried out to investigate the effect of Trichosanthis Radix extract (TRE) on the proliferation and activation of eosinophils which were prepared from lung cells of asthma-induced mice by ovalbumin (OVA) treatment. Methods : C57BL/6 mouse was exposed to OVA three times a week for 6 weeks. The mouse lung tissues were dissected out, chopped and dossiciated with collagenase (1 $\mu$g/ml). Eosinophils were activated by rmIL-3/rmIL-5 co-treatments. The lung cells were treated with TRE, incubated for 48 hr at 37$^{\circ}C$, and analyzed by flow cytometer, ELISA and RT-PCR methods Results : To measure cytotoxicity, mouse lung fibroblast cells (mLFCs) were pretreated with various concentrations of TRE. TRE at 100 $\mu$g/ml, the highest concentration, examined did not have any cytotoxic effects on mLFCs. In FACS analysis, number of granulocyte/lymphocyte, CD3e-/CCR3+, CD3e+/CD69+, CD4+/CD8+ T cells in asthma-induced lung cells were significantly decreased by TRE treatment compared to the control group. But CD4+/CD25+ T cells were not examined significant change in lung cells treated with TRE. In ELISA analysis, production levels of IL-3, IL-5, IL-13 and histamine in asthma-induced lung cells, which were induced by rIL-3 plus rmIL-5 co-treatment, were significantly decreased by TRE treatment. Conclusions : The present data suggested that Trichosanthis Radix on the inhibition of parameters associated with asthma responses in eosinpophils, and thus implicate the possibility for the clinical application of Trichosanthis Radix.
Polyclonal antiserum R101 against aflatoxin $B_1$ ($AFB_1$) was raised in New Zealand white rabbits after injection of bovine serum albumin-$AFB_1$ conjugate. Competitive ELISA (enzyme linked immuno-sorbent assay) demonstrated that antiserum R101 has the highest binding for $AFB_1$ (50% inhibition at 170 fmol) and aflatoxicol II (50% inhibition at 112 fmol). It also reacts with other aflatoxins such as $AFB_2$, $AFG_1$, $AFG_2$, and aflatoxin metabolites ($AFM_1$, $AFM_2$, $AFP_1$, and $AFQ_1$), but it does not cross-react with $AFG_2a$. Using this antiserum, aflatoxins were quantitated in 100 urine samples of undergraduate students at the College of Pharmacy, Sung Kyun Kwan University, Republic of Korea. By ELISA, $AFB_1$ and its metabolites were detected in human urine samples (N=100, male=89, female=11, ages=20~31 yrs) with a range of 1.4~200.6 ng/kg/day (mean$\pm$SD=$18.11{\pm}33.01\;ng\;AFB_1/kg/day$ in males, $3.82{\pm}2.65\;ng/kg/day$ in females). Assuming that urinary excretion is about 7.6% of $AFB_1$ intake (Groopman et al., 1992), we estimated that Koreans were daily exposed to a total dietary $AFB_1$ of $240.20{\pm}438.67\;ng/kg/day$ in males and $50.35{\pm}29.88\;ng/kg/day$ in females, respectively. When the human monitoring data was applied to a linear regression model of Y=21.67X-10.04 {Y=liver cancer incidence per 100,000, X=Log $AFB_1$ intake (ng/kg/day), r=0.99} developed from previously reported epidemiological data, calculated liver cancer incidences attributed to $AFB_1$ exposure were 41.56/100,000 in males and 26.84/100,000 in females. The incidences were similarly correlated with liver cancer mortality rates of 43.43/100,000 in males and 11.23/100,000 in females in Korea. These results suggest that aflatoxin exposure may be an important risk factor for the high incidence of liver cancer in Korea.
It is extremely important to destroy the antigenicity of milk proteins for dietetic treatment of infants with milk allergy. Enzymatic digestion of milk protein is not only effective for destroying antigenicity, but it also is less liable to alter the nutritive value. Bovine casein was hydrolyzed with eight different commercial proteases derived from bacterias or fungi, either individually or in combination to eliminate protein allergenicity. The average molecular weight of casein hyrdolysates determined by size exclusion chromatography is about 550${\sim}$2,300 dalton range. Antigenicity of the casein hyrdolysates was not detected by heterologous passive cutaneous anaphylaxis in guinea pig-rabbit antiserum system. The inhibition test on the enzyme-linked immunosorbent assay(ELISA) showed that the antigenicity of casein hydrolysates is lowed up to 1/8,000 than that of intact bovine casein. As the enzyme reaction was carried out by the combination of bacterial and fungal protease, casein hydrolysates showed much lower bitterness and antigenicity. It suggests that these hydrolysates will be applied to many kinds of foods including the development of hypo-allergenic infant formula.
Korean mistletoe (Viscum album) extract has been found to posses immunostimulatory activity. In this study, Korean mistletoe extract, M11C (non-lectin components), was used to know whether this extract might activate mouse splenic macrophages to produce tumor necrosis $factor-{\alpha}\;(TNF-{\alpha}$) and might play a role in anticancer. To know the effect of M11C on the production of $TNF-{\alpha}$, the splenic macrophages were treated by the M11C, and then collected the supernatant (M11C stimulated splenic macrophage-conditioned media; MSCM). MSCM was analyzed for the $TNF-{\alpha}$ secretion by means of ELISA and immunoblotting, and mRNA expression was analyzed by RT-PCR. The S-180 murine sarcoma model was established to know the effect of M11C on the inhibition of tumor growth. M11C had the effect of $TNF-{\alpha}$ production from splenic macrophages performed by ELISA technique. This ELISA data was reconfirmed by immunoblotting assay. The effects of M11C on the expression of $TNF-{\alpha}$ mRNA from the macrophages was also shown. M11C also had the inhibitory effect of S-180 tumor growth. These data suggest that Korean mistletoe extract M11C may be used for an immunomodulator.
In order to investigate the lowering effects of in vitro enzymatic hydrolysis by the treatment of chymotrypsin, trypsin, pancreatin, or protease from Aspergillus oryzae on the antigenicity of whey protein(WPI) against rabbit anti ${\beta}-LG$ antiserum, competitive inhibition ELISA(cELISA) and passive cutaneous anaphylaxis(PCA) test using guinea pig were performed. The results of cELISA showed that the monovalent antigenicity of the whey protein hydrolysates(WPH) to the antiserum was decreased to $10^{-1.7}{\sim}10^{-4.1}$ and less by the hydrolysis. Especially, the antigenicity of OUP(hydrolysate by protease from Asp. oryzae with preteatment of pepsin) was found almost to be removed. By the heterologous PCA the polyvalent antigenicity of the WPH was decreased to $1/2{\sim}1/128$ and less. Especially, the polyvalent antigenicity of OUN(hydrolysate by protease from Asp. oryzae without preteatments) was found almost to be removed, although OUN did not have so high degree of hydrolysis(DH) or so low monovalent antigenicity (reduced to $10^{-3.2}$). Therefore, this result was assumed to come from effective destruction of antigenic determinants on ${\beta}-LG$ in WPI, not to produce polyvalent antigenic peptides that are closely associated with induction of allergy. This finding suggested that WPH prepared by the treatment of microorganic protease from Asp. oryzae would be a material for hypoallergenic infant formula due to the removal of the polyvalent antigenicity of ${\beta}-LG$, the major milk allergen in WPI.
Background: To investigate tumor inhibition effects and mechanisms of Angelica sinensis and Sophorae flavescentis ait decoction (ASSF) combined with diamine-dichloroplatinum (DDP). Materials and Methods: Bodyweight, tumor inhibition rate and q value were calculated for single ASSF or ASSF combined with DDP on H22 carcinoma xenograft KM mice. Biochemical methods for serum LDH, AST, ALT, and AKP, ELISA method for serum HIF-$1{\alpha}$, pathological assessemnt of thymus, immunohistochemistry detection of tumor tissue caspase3 and mutant p53 protein, and qRT-PCR detection of bax/ bcl-2 mRNA were applied. Results: Compared with DDP control group, the bodyweight increased in ASSF-DDP group (p<0.01). Tumor inhibition rates for DDP, ASSF, ASSF-DDP were 62.7%. 43.7% and 71.0% respectively, with a q value of 0.90. Compared with other groups, thymus of DDP control group had obvious pathological injury (p<0.01), serum LDH, AST, ALT, AKP increased significantly in DDP control group (p<0.01), while serum HIF-$1{\alpha}$ was increased in the model control group. Compared with this latter, the expression of mutant p53 protein and bcl-2 mRNA were decreased in all treatment groups (p<0.01), but there were no statistical difference between DDP control p and ASSF-DDP groups. The expression of caspase3 protein and bax mRNA was increased in all treatment groups, with statistical differences between the DDP and ASSF-DDP groups (p<0.01). Conclusions: ASSF can inhibit bodyweight decrease caused by DDP, can inhibit tumor growth synergistically with DDP mainly through increasing serum HIF-$1{\alpha}$ and pro-apoptotic molecules such as caspase 3 and bax, rather than through decreasing anti-apoptotic mutant p53 and bcl-2. ASSF can reduce DDP toxicity due to decreasing the release of LDH, AST, ALT, AKP into blood and enhancing thymus protection.
In order to establish ELISA method to detect antibody against IBV various factors involved were examined. Antigen was prepared from Massachusetts type IBV which is known to be one of serotypes distributed most widely. The virus was grown in embryonated SPF chicken eggs. Allantoic fluid harvested was processed to ultracentrifugation and sucrose density gradient centrifugation to produce a purified antigen The antisera selected from the field samples based on hemagglutination inhibition test were used as the standard positive and negative sera for this study and the results obtained were summarized as follows. 1 , It was found that ELISA test was satisfactory when the purified antigen was coated on the plate in the amount of about 40ng protein per well. In case of the phospholipase treated hemagglutinating antigen it gave satisfactory results when the each well wns coated with 1.2 to 2.5 hemagglutinating unit which was equivalent to 40 to 90ng of protein. 2. There was no significant difference in the ratio of optical density of positive to that of negative serum whether the coated antigen was held for 1 hour at 37$^{\circ}C$ or it was held overnight at 4$^{\circ}C$. The coated antigen could be kept in dried state without change of antigenecity for at least one month of experimental period at 4$^{\circ}C$. 3. There was a big variation in the optical density and P/N values depending on the maker of the plates and on the plate of the same maker. 4. It was found that background optical density was negligible when serum was diluted more than 1:50 and serum dilution of 1:100 appeared to be appropriate as a routine test dilution to screen the antibody. 5. Optical density was fairly constant 15 minutes afterward from the time substrate was treated and during the 4 hours after stopper was treated. 6. There was a low correlation(r=0.42) between ELISA and HI test. However, when 74serum samples were tested for the IBV antibody, 98.7% were found to be positive by both tests in which titers of 2$^{6}$ or more by HI test and P/N values of 1.4 or more by ELISA were considered to be positive, 7 Day-old IBV vaccinated chickens shows a similar antibody decay and rising pattern until 8 weeks of age by the two tests, ELISA and HI.
Objective : To examine the efficacy of CY, the improvement of atopy dermatitis(AD)-like lesions on the rostral back of the NC/Nga mice, which took CY orally and were treated with a chemical substance called DNFB, the inhibition of ear swelling, and the inhibition of inflammatory response of the ear tissue of the mice were observed and compared, and the inhibition of the serum IgE count and the IL-4 and IFN-${\gamma}$ count produced by CD4+ T cells of the lymph node were observed and compared. Materials and Methods : For measurement of ear thicknesses, 0.15% DNFB $25{\mu}l$ mixed with acetone/olive oil(3:1) was applied to the right ear and dorsal skin of the NC/Nga mice 5 times at an interval of 7 days. Ear thickness was measured every day over a five-week period after the first application of DNFB. The total serum IgE count was measured with ELISA by taking blood samples 24 hours after the fifth application of DNFB. To measure the IL-4 and IFN-${\gamma}$ count, the lymph node was cut off, and the CD4+ T cells were purified and stimulated to activate the T cells, and then the IL-4 and IFN-${\gamma}$ count was measured with ELISA. Results : Continuous oral administration of CY improved the AD-like skin lesions on the rostral back and inhibited the ear swelling in NC/Nga mice treated with DNFB and inhibited the inflammatory response in the NC/Nga mice treated with DNFB NC/Nga mice. Continuous oral administration of CY did not significantly inhibit the serum IgE count and failed to significantly reduce the IL-4 count generated after TCR stimulation in the CD4+ T cells of the NC/Nga mice treated with DNFB. Continuous oral administration of CY significantly reduced the IFN-${\gamma}$ count generated after TCR stimulation in the CD4+ T cells of the NC/Nga mice treated with DNFB.
Ha, Woel-Kyu;Juhn, Suk-Lak;Kim, Jung-Wan;Lee, Soo-Won;Lee, Jae-Young;Shon, Dong-Hwa
Korean Journal of Food Science and Technology
/
v.26
no.1
/
pp.74-80
/
1994
As a preliminary study about the reduction of the antigenicity of whey protein isolate(WPI) by treatment of chymotrypsin, trypsin, pancreatin, and protease from Aspergillus oryzae, the properties and antigenicities of whey protein hydrolysates(WPH) were investigated. When degrees of hydrolysis (DH) were measured by use of trinitrobenzensulfonic acid(TNBS), the DH of the WPH treated by pancreatin or protease from Aspergillus oryzae$(5.05{\sim}11.47)$ were much higher than those of the tryptic or chymotryptic WPH$(15.67{\sim}20.20)$. And the pretreatments of heat$(75^{\circ}C)$, 20 min and/or pepsin resulted in higher DH of WPH, generally. When the molecular distributions of the WPH were determined by high performance size exclusion chromatography(HPSEC), the ratios of polypeptides with molecular weight more than 10kDa ranged from 12% to 36%, and the average molecular weights and the average peptide lengths of the WPH were $4,252{\sim}9,132$ dalton and $38{\sim}83$ amino acids, respectively. And there was no bitter taste in all of the WPH. Results of SDS-PAGE showed that most of intact native proteins were eliminated by the enzymatic hydrolysis but there were a few bands of peptides larger than 14.2 kDa in some WPH. When antigenicity was assayed by competitive inhibition enzyme-linked immunosorbent assay(cELISA), monovalent antigenicity of WPH to rabbit anti-WPI antiserum were lowered to $10^{-1.7}-10^{-4.9}$ times and less by the enzymatic hydrolysis. And the pretreatments of heat and pepsin resulted in the lowest antigenicicy within a group of enzymatic hydrolysis, especially in case of the pancreatic hydrolysate(PDP) whose antigenicity was found almost to be removed.
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