• Archives of Pharmacal Research
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• 제26권7호
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• pp.535-539
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• 2003

The EtOAc soluble fraction from the stem of Sorghum bicolor showed a strong free radical scavenging activity. Five major compounds were isolated from this fraction. They were identified by spectral data as methyl ferulate (1), methyl p-hydroxycinnamate (2), p-hydroxybenzaldehyde (3), tricin (4), and quercetin 3,4 -dimethyl ether (5). Among these compounds, 1 exhibited a strong, free radical scavenging activity on 1, 1-diphenyl-2-picrylhydrazyl (DPPH) with an $IC_50$ value of 0.7 $\mu$M. We further studied the effects of these isolated compounds on the lipid peroxidation in rat liver microsomes induced by non-enzymatic method. All five compounds showed anti-lipid peroxidation activity ($IC_50$ values of 0.5, 0.4, 0.3 and 0.3 $\mu$ M, respectively).

• 생명과학회지
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• 제10권5호
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• pp.467-474
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• 2000

Male mice (ddY strain) were fed a laboratory chow diet containing the water extract from stem bark of Rhus verniciflua Stokes (RVS) for 14 days. There were no significant difference in body weight gain, feed intake, the hepatic lipid profile and serum total cholesterol and phodpholipid concentrations. The concentration of triglyceride in serum was significantly lower in the RVS group than that in the control group. The concentration of high-density-lipoprotein cholestrol in serum was significantly higher in the RVS group than that in the control group. The methanol extract from RVS stem bark effectively inhibited the formation of thiobarbituric acid-reactive substances as a marker of lipid peroxidation of liver microsomes in a concentration-dependent manner. This study showed that the water extract from stem bark of RVS decreased the serum triglyceride concentration and methanol extract has an antioxidative activity.

• 한국연초학회지
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• 제9권2호
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• pp.87-93
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• 1987

The mutagenic activities of the pyrolyzates (300, 600, 750 and 85$0^{\circ}C$ ) of extracts from three saponeous expectorants (Platicodi Radix, Polygalae Radix and Asiasari Radix) and two nonalkaloidal antitussives (Lirionis Tuber and Codonopsis lanceolata Radix), medicinal plants, were studied in the Ames Salmonella/microsomes test system. The pyrolysates of Codonopsis lanceolata Radix and Asiasari Radix extracts at 85$0^{\circ}C$ were slightly mutagenic to tester strain TA98( frame shift ) and TA100(base-pair substitution) of Salmonella typhimurium, and the mutagens in these pyrolyzates required the metabolic activation by a liver microsomal fraction However, the extracts and pyrolyzates of all medicinal plants tasted except the above two results dud not show the significant increase in revertant colonies.

• BMB Reports
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• 제30권2호
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• pp.157-161
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• 1997

The present paper reports characteristics and specificity of the inhibitory action of $N^{\alpha}-tosyl-L-lysine-chloromethyl\;ketone$ (TLCK) and $N^{\alpha}-tosyl-L-phenylalanine-chloromethyl\;ketone$ (TPCK) on the glucose6-phosphate transporter of rat liver microsomes. The TLCK-induced inhibition was pH dependent. The inhibition constants for TPCK were determined by following pseudo-Lst order reaction mechanism. The inhibition was protected by preincubation with excess amount of glucose-6-phosphate. The results proved that (a) TLCK inactivates the microsomal glucose-6-phosphate transporter, (b) the inhibition results from the modification of sulfhydryl groups of the transporter.

• Asian-Australasian Journal of Animal Sciences
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• 제16권5호
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• pp.732-737
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• 2003

Anti-antibodies against three mouse monoclonal antibodies viz. IIB5D6, VIA6E8 and VIC1F9 (specific to bovine growth hormone) in rabbits have been generated and characterized. Ammonium sulfate fractionated and affinity-purified monoclonal antibodies were used for producing anti-antibodies. The generated anti-antibodies were against common as well as uncommon antigenic determinants present in mouse monoclonal antibodies. The raised anti-antibodies replaced [$I^125$ ]bGH bound to goat liver microsomes indicating production of anti-idiotypic antibodies against bovine growth hormone. These antibodies can have profound implications in vivo in lactating bovines for enhancing milk yield.

• Journal of Microbiology and Biotechnology
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• 제10권2호
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• pp.233-237
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• 2000

As part of a continuing investigation to identify free radical scavengers from the fruit bodies of basidiomycetes, we isolated two p-terphenyl compounds, designated as PAl and PA2l, from cethanolic extract of the fruit body of Pasillus panuoides. The methanolic extract was processed by ethyl acetate extraction and silica gel column chromatography to yield two active fraction. PAl was obtained from one of the fractions through Sephadex LH-20 and silica gel column chromatographies and reverse-phase HPLC. The other fraction was purified by Sephadex LH-20 and reverse-phase column chromatographies to produce PA2. The compounds PA1 and PA2 were identified as leucomentin-4 and leucomentin-2, respectively, on the basis of various spectroscopic analyses. These compounds exhibited strong inhibitory activities against lipid peroxidation in rat liver microsomes with IC_{50}$ values of 0.10 and $0.06{\;}\mu\textrm{g}ml$, respectively.

• 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.127.2-128
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• 2003

Rutaecarpine is an alkaloid originally isolated from the unripe fruit of Evodia rutaecarpa. In addition to its traditional use in treatment of gastrointestinal disorders, rutaecarpine has recently been characterized to have anti-inflammatory activity through cyclooxygenase-2 inhibition. More recently, to develop rutaecarpine as an anti-inflammatory agent, total synthesis of rutaecarpine has successfully been established in our group. (omitted)

• 약학회지
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• 제34권5호
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• pp.291-295
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• 1990

A modified method was investigated for the determination of benzo(a)pyrene metabolites generated by the rat liver microsomes based on the HPLC technique with radioactive flow detection. By adding $[^3H]-dexamethasone$ to the B(a)P metabolites mixture metabolized by the microsome, the poor yield of solvent extaction of B(a)P metabolites was compensated.

• 한국독성학회:학술대회논문집
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• 한국독성학회 2001년도 International Symposium on Dietary and Medicinal Antimutgens and Anticarcinogens
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• pp.195-195
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• 2001

The inhibitory potentials of TCAs (imipramine, desipramine, amitriptyline, and nortriptyline) on phenytoin p-hydroxylation and probe metabolic pathways of each CYP isoforms were evaluated from incubation studies of human liver microsomes and cDNA-expressed cytochrome P450s in vitro in order to understand the mechanism of drug interaction between TCAs and phenytoin, a substrate of CYP2C9 and CYP2C19. (omitted)

• 한국독성학회:학술대회논문집
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• 한국독성학회 2001년도 International Symposium on Dietary and Medicinal Antimutgens and Anticarcinogens
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• pp.198-198
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• 2001

No report has been addressed to the CYP isoforms catalyzing chlorpropamide, a structural analogue of tolbutamide. To evaluate enzyme(s) mediating formation of 2-hydroxycWorpropamide, a major metabolite and identified by LC/Mass and NMR, incubation studies using human liver microsomes and cDNA expressed CYP were performed on the presence or absence of selective inhibitors of each CYP isoform. (omitted)