• Journal of Yeungnam Medical Science
• /
• 제11권2호
• /
• pp.262-269
• /
• 1994

Cisplatin을 투여한 흰쥐의 간장 및 신장에서GSH의 역할을 관찰하고자 총 GSH의 농도, GSH peroxidase 및 GSH reductase이 효소활성도를 관찰하여 다음과 같은 결과를 얻었다. 총 GSH의 양(mM/g protein)은 간에서는 cisplatin을 투여한 군($1.51{\pm}0.28$)이 대조군(0.95+0.28)에 비해 현저히 증가하였으며 (p<0.01), 신장에서도 cisplatin 투여군(0$0.87{\pm}0.20$)이 대조군($0.60{\pm}0.14$)에 비해 유의하게 증가하였다(p<0.05). GSH peroxidase의 활성도(${\mu}M$ NADPH/mg protein/min)는 간장에서 cisplatin을 투여한 군($348.0{\pm}18.54$)이 대조군(415.5+53.15)에 비해 현저히 감소하였으며(p<0.01), 신장에서도 cisplatin 투여군($380.5{\pm}51.86$)이 대조군($327.2{\pm}20.36$)에 비해 유의하게 증가하였다(p<0.01). GSH reductase의 활성도(${\mu}M$ NADPH/mg protein/min)는 간장에서 cisplatin 투여군($3.09{\pm}0.88$)이 대조군(2.28+0.61)에 비해 현저히 증가하였으며(p<0.01), 신장에서도 cisplatin 투여군($3.30{\pm}1.01$)에 비해 cisplatin 투여군($8.50{\pm}2.62$)이 현저히 증가하였다(p<0.01). Cisplatin 투여로 인한 해독작용은 간에서는GSH의 양이 신장과 비교시 현저히 증가하였고 GSH reductase의 증가 및 GSH peroxidase의 감소로cisplatin해독에 GSH가 많이 이용되어 해독작용이 신장보다 더 잘 일어났으며 신장에서는 GSH가 증가하였으나 두 효소 모두 증가하였으므로 GSH가 일부 산화형으로 이용되어 간에서 보다는 해독작용이 적게 나타난 것으로 생각된다.

• Journal of Nutrition and Health
• /
• 제33권7호
• /
• pp.733-738
• /
• 2000

The purpose of this study was to investigate the effects of green tea on gene expression of superoxide dismutase(SOD) and glutathione peroxidase(GSH-Px) in rat liver exposed to microwave. Sprague-Dawley male rats with 200$\pm$10g body weight were assigned to normal and microwave exposed groups : microwave exposed groups ; microwave exposed groups were divided two groups : microwave(MW) group which was administrated the distilled water and green tea(GT) group which was administrated the green tea extracts. The rats were irradiated with microwave at frequence of 2.45 GHz for 15 min and then the gene expression in the damaged tissue were investigated at 0.1, 3, 4,6 and 8 days after the microwave irradition to compared with the normal group. The level of SOD gene expression in MW group was lower than the normal group within 6 days but that of GT group as higher than MW group. These results may imply that green tea stimulates SOD expression and there by protecting tissues from free radicals. The GSH-Px gene was expressed a little bit lower than the normal group but that of GT group was expressed to higher lever than MW group from 4 days after irradiation. These results suggest that the administration of green tea extract may activate antioxidative gene expressions such as SOD and GSH-Px in rat and that may help to recover liver tissues from microwave damage by removing hazardous free radicals and oxidized by products from cells.

• 한국임상수의학회지
• /
• 제16권2호
• /
• pp.272-275
• /
• 1999

Generally, it is known that the composition of the cation of the dog's RBCs is high in potassium(K) and low in sodium(Na). However, it is reported that certain kinds of dogs have HK, HG phenotype which contains a large amount of reduced glutathione(GSH) by the effect of Na-K pump on the cell membrane of RBC with high concentration of K and low concentration of Na. Although this HK phenotype is not regarded as a disease, it is supposed to be an important assignment to examine the distribution and the occurrence rate of the dogs that contain HK cell in their RBCs for the proper clinical treatments as these HK dogs are very sensitive to aromatic disul-fide or onions and have a tendency to cause hemolysis. Accordingly, present study was performed to measure the concentration of K, Na and GSH in the RBCs of Jindo dogs and that of Dosa dogs at the same time.

• 한국어병학회지
• /
• 제25권1호
• /
• pp.31-37
• /
• 2012

우리나라의 주요 해산양식어종인 돌돔, Oplegnathus fasciatus을 대상으로 30, 60, 120 및 240 mg/kg의 아연을 40일 동안 경구 투여에 따른 아가미와 간의 항산화효소 활성의 변화를 검토하였다. 돌돔 간의 superoxide dismutase(SOD) 활성은 30~240 mg/kg 아연농도, glutathione peroxidase (GPx) 활성은 30~120 mg/kg의 아연농도에서 유의적으로 증가하였다. 돌돔 아가미의 SOD 및 Glutathione(GSH) 활성은 120 및 240 mg/kg 아연농도, GPx활성은 60~240 mg/kg의 아연농도에서 유의한 증가가 관찰되었다.

• Preventive Nutrition and Food Science
• /
• 제22권2호
• /
• pp.118-123
• /
• 2017

This study was conducted to investigate the anti-adipogenic activity of esculetin (ECT) which is reported to be attributable to the modulation of antioxidant enzymes during adipogenesis. After six days of ECT treatment of 3T3-L1 cells, lipid accumulation was determined by Oil red O staining. The levels of glutathione (GSH) and reactive oxygen species (ROS), and the activities of antioxidant enzymes including glutathione reductase, glutathione peroxidase (GPx), and catalase were examined. In addition, the protein expression of glutamate-cysteine ligase catalytic subunit (GCLC) and heme oxygenase-1 (HO-1) was measured by Western blot. ECT significantly inhibited lipid accumulation by approximately 80% and ROS production in a concentration-dependent manner. GSH level and GPx activity were increased by ECT by approximately 1.3-fold and 1.7-fold compared to the control group, respectively. GCLC and HO-1 expression were elevated by ECT. These results showed that ECT treatments strongly inhibit adipogenesis, increase GSH level, and upregulate the expression of GCLC and HO-1, possibly by decreasing ROS production in 3T3-L1 cells during adipogenesis.

• 동의생리병리학회지
• /
• 제22권1호
• /
• pp.126-130
• /
• 2008

Water extract from Prunella vulgaris L. (PVW) was tested for colon cancer chemopreventive activity by measuring the activities of cytochrome P450 1A1, phase Ⅱ detoxification enzyme [quinone reductase (QR) and glutathione S-transferase (GST)] and ornithine decarboxylase (ODC) and glutathione (GSH) levels in cultured human colorectal adenocarcinoma HT-29 cells. PVW significantly inhibited 7,12-dimethylbenz[a]anthracene (DMBA)-induced cytochrome P450 1A1 activity at 10 and 50 ${\mu}g/ml$. PVW induced QR activity in a dose-dependent manner over a concentration range of $1{\sim}50\;{\mu}g/ml$. GST activity was also induced with the treatment of PVW in HT-29 cells. In addition GSH levels were increased with PVW. PVW inhibited ODC activity, a key enzyme of polyamine biosynthesis, which is enhanced in tumor promotion. These results suggest that Prunella vulgaris L. has colon cancer chemopreventive activity by inhibiting cytochrome P450 1A1 and ODC activities and by increasing phase Ⅱ enzyme activity and GSH levels.

• Korean Journal of Acupuncture
• /
• 제18권1호
• /
• pp.21-26
• /
• 2001

발암물질을 무독화시키는 QR 생성 유도를 살펴보기 위하여 황기 약침액 및 열수추출액을 생쥐의 간암세포인 Hepa1c1c7에 처리하여 측정한 결과, 황기 약침액의 농도를 증가시킬수록 많은 QR 생성율을 보였으며, GSH 생성이 증가하였고, GST 생성 또한 증가하였다.

• Archives of Pharmacal Research
• /
• 제22권4호
• /
• pp.384-390
• /
• 1999

Thirty-four glutathione conjugates of 5,8-dimethoxy-1,4-naphthoquinones (DMNQ) were synthesized and their structure was determined. The yield of GSH conjugate was dependent on size of alkyl group; the longer the size of alkyl group was, the lower was the yield. It was also found that the length of alkyl side chain influenced the chemical shift of quinonoid protons; the quinonoid protons of 2-glutathionyl DMNQ derivatives with R=H to propyl, 6.51-6.59 ppm vs. other ones with R=butyl to heptyl, 6.64-6.68 ppm. this was explained to be due to a folding effect of longer alkyl group. Glutathione (GSH) reacted with DMNQ derivative first to form a 1,4-adduct (2- or 3-glutathionyl-1,4-dihydroxy-5,8-dimethoxynaphthalenes) and then the adduct was autooxidized to 2- or 3-glutathionyl-DMNQ derivatives. Moreover, GSH reduced DMNQ derivatives to their hydrogenated products. It was suggested that such an organic reaction might play an important role for a study of metabolism or toxicity of DMNQ derivative sin the living cells.

• BMB Reports
• /
• 제55권3호
• /
• pp.154-159
• /
• 2022

Protein S-glutathionylation is a reversible post-translational modification on cysteine residues forming a mixed disulfide with glutathione. S-glutathionylation, not only protects proteins from oxidation but also regulates the functions of proteins involved in various cellular signaling pathways. In this study, we developed a method for the detection of S-glutathionylated proteins (ProSSG) using eosin-glutathione (E-GSH) and mouse glutaredoxin 1 (mGrx1). ProSSG was efficiently and specifically labeled with E-GSH to form ProSSG-E via thiol-disulfide exchange. ProSSG-E was readily luminescent allowing the detection of ProSSG with semi-quantitative determination. In addition, a deglutathionylation enzyme mGrx1 specifically released E-GSH from ProSSG-E, which increased fluorescence allowing a sensitive determination of ProSSG levels. Application of the method to the adipocyte differentiation of 3T3-L1 cells showed specific detection of ProSSG and its increase upon differentiation induction, which was consistent with the result obtained by conventional immunoblot analysis, but with greater specificity and sensitivity.

• 한국동물학회지
• /
• 제33권4호
• /
• pp.476-492
• /
• 1990

흰쥐 간세포에 존재하는 비소결합물질의 특성을 조사하기 위하여 4 ppm의 비소를 포함하는 NaASO$_2$수용액의 식수로 15일간 흰쥐에 공급하였다. 비소처리군의 간 cytosol분획의 정상단백 질의 함량은 감소하였으나 8종류의 stress protein의 함량은 증가하였다. Cytosol에 존재하는 비소결합체물질은 한 종류이고,glycine, glutamic acid 및 cysteine의 3종류의 아미노산으로 구성되어있으며 분자량은 500D이었다.Glutathione은 비소와 5:1의 몰비로 결합하였으며 glutathione과 비소의 복합체는 gel filtration chromatography에서 비소결합물질과 같은 이동성을 나타내어 cytosol에 존재하는 미소결합물질은 glutathione으로 추정되었다. Glutathione에 결합한 비소는 미토콘드리아의 호흡, 형태전환 및 팽윤과 수축기능에 있어서 대조군과 별다른 차이를 나타내지 않았다. 이와 같은 결과들로써, 생체에 직접 처리한 비소에 의하여 stress protein합성이 촉진되며, 간 cytosol에 존재하는 비소결합물질은 glutathione으로 추정되고, 비소와 복합체를 형성함으로써 비소의 세포독성에 대한 방어기능을 나타내는 것으로 생각된다.