• 한국환경과학회지
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• 제28권11호
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• pp.943-950
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• 2019

The purpose of this study was to probe the influences of NaF oral administration on a dose-effect relationship between fluoride levels of serum enzyme activity such as alkaline phosphatase (ALP), aspartate aminotransferase (AST), alanine aminotransferase (ALT), and lactate dehydrogenase (LDH) in rats fed experimental diets for 5 weeks. All groups increased the activity of serum ALP, AST, ALT, and LDH levels with increasing NaF. In addition the fluoride levels of serum and organ tissues (liver, brain, heart, lung, kidney) in oral NaF groups (NF3~NF50) were significantly increased by adding sodium fluoride in comparison with normal diet group (ND) (p<0.05). These results, a high concentration of sodium fluoride was determined that the toxicity to various organ tissues.

• 대한의생명과학회지
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• 제11권1호
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• pp.37-43
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• 2005

The possible mechanisms of increased aryl sulfotransferase (AST) isozymes activities in cholestatic rat liver were studied. Hepatic AST-I, II and -III, IV activities were determined from the experimental rats with common bile duct ligation (CBDL). The Michaelis-Menten constants in these hepatic enzymes were also measured. The activities of mitochondrial AST-I, II and -III, IV, and microsomal AST-III, IV as well as their Vmax values were found to be increased significantly in CBDL plus taurocholic acid (TCA) injected group than in the control group, such as CBDL alone groups. However, their Km values in the experimental groups did not vary. The results suggest that TCA stimulates biosynthesis of the AST in the liver.

• 한국동물위생학회지
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• 제16권2호
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• pp.127-137
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• 1993

Carbon tetrachloride ($CCl_4$) has been used to treat a variety of parasitic infection in both large and small animals, including Fasciola hepatica. Recently, we can easily contest with carbon tetrachloride in air, food, water, rain and Industry area etc. and it is using in order to induce liver injury in laboratory. In this study. we investigated activitis of LDH, ALP, AST and ALT and amount of cholesterol, triacylglycerol, glucose and BUN in mice serum exposed to $CCl_4.$ The mice divided Into a Naive control(A), corn oil control(B) and experimental group(C, D). Naive control group(A) was given feed and water only. Corn oil control group(B) was given corn oil 1ml /100g of body weight(B.W). Experimental group(C) was given carbon tetrachloride 1ml /100g B.W. ($CCl_4$： corn oil=1：20(V /V) ), Experimental group(D) was given carbon teterachloride 1ml /100g B.W. ($CCl_4$: corn oil=1：10(V /V) ). The results obtained were summarized as follows : 1) The body weight was declined after the l0th day In mice exposed to carbon tetra-chloride. 2) The total protein level in serum was significantly in mice exposed to carbon tetra-chloride($P{\leq}0.05$). The albumin and A /G ratio was decresed significantly in mice exposed to carbon tetrachloride($P{\leq}0.01$) 3) All of the activity of LDH, AST, ALT and ALP in mice serum exposed to carbon tetra chloride inclosed significantly activity of LDH ($P{\leq}0.05$), inclosed significantly activity of AST($P{\leq}0.05, \;p {\leq}0.01$), inclosed significantly activityof ALT 3nd ALP($P {\leq}0.05,\;p {\leq}0.01$). 4) The amount of cholesterol and triacylglycerol, lipid metabolite products in serum was inclosed in case of cholesterol but did not change in case of triacylglycerol.

• 한국수산과학회지
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• 제47권2호
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• pp.129-134
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• 2014

Two neuropeptides were purified from the acidified tube feet extract of the starfish Asterias amurensis by C18 reversed phase and size-exclusion high-performance liquid chromatography (HPLC). The tube feet extract and the purified peptides (AST-I and AST-II) showed potent contractile activity on dorsal retractor muscle (DRM) of the starfish Asterina pectinifera and intestine (smooth muscle) of the panther puffer Takifugu pardalis. Treatment of the purified peptides with dithiothreitol (DTT) for 60 min at $37^{\circ}C$ significantly altered their retention times, suggesting that these compounds contained disulfide bonds. The molecular weights of AST-I and AST-II were determined to be 2064.2 Da and 6137.2 Da, respectively, by MALDI-TOF mass spectrometry.

• Applied Biological Chemistry
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• 제39권2호
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• pp.140-146
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• 1996

Imidacloprid와 일련의 새로운 1-(6-chloro-3-pyridylmethy)-3-N-nitroimidazolidin-2-ylideneamine 유도체들을 합성하고 imidazolidine고리의 3-N-치환기(R) 변화에 따른 구조와 벼멸구(Nilaparvata lugens) 및 복숭아 혹 진딧물(Myzus persicae)에 대한 선택적인 살충활성 관계(SAR)를 검토한 바, 벼멸구에는 STERIMOL 파라미터인 B1상수$({\AA})$보다 소수성$({\pi})$, 그리고 복숭아 혹 진딧물에는 입체상수(Es)보다 극성 치환기상수$({\sigma}^{ast})$ 큰 변수로 작용하였다. 벼멸구의 경우에는 ${\pi}$상수의 적정값이 0.52이고 복숭아 혹 진딧물의 경우에는 $\sigma^{\ast}$상수의 적정값이 1.17로 이들 값에 가까운 값을 갖는 치환체일수록 큰 살충활성이 예상되었다. 두 경우, 모두 공통적으로 methyl 및 benzenesulfonyl-치환체(7 및 8)와 같은 센 전자끌게들은 살충활성에 기여하지 않았다. 그러나, 비치환(H)체(1)인 imidacloprid는 가장 큰 살충활성을 나타내었으며 H의 ${\pi}$상수와 ${\sigma}^{\ast}$상수가 이들 두 상수의 적정값에 미치지 못하지만, 양호한 살충활성을 나타낸 까닭은 2-N-nitro group의 산소원자와 3-imid group의 수소원자 사이에 형성된 분자내 회합(H-결합)에 기인함을 알았다. 그리고 pH 6.0 이하의 산성 수용액에서는 대단히 큰 잔류성을 나타내었으며 $45^{\circ}C$의 pH 7.0에서$(K_{obs};5{\times}10^8sec.^{-1})$ 반감기(t1/2)는 대략 6개월이었다.

• 한국양식학회지
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• 제19권1호
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• pp.57-63
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• 2006

본 실험은 사료 내 스피룰리나와 아스타잔틴의 첨가가 겨울철 저수온기 넙치 치어의 성장과 조직 내 항산화활성 효과를 알아보기 위하여 수행되었다. 총 180마리의 치어기 넙치(초기 평균무게, $27.8{\pm}0.3g$)를 3반복으로 12개의 수조에 배치하였다. 4가지 실험사료는 기초사료를 이용한 대조구와 기초사료에 아스타잔틴을 0.5% 첨가한 AST사료, 스피룰리나를 0.5% 첨가한 SPI사료, 그리고 아스타잔틴과 스피룰리나를 각각 0.5% 씩 혼합하여 첨가한 AST+SPI사료로 제조되었다. 6주간의 사육실험 후, 사료 내 스피룰리나와 아스타잔틴을 첨가한 실험구의 성장률, 일간성장률, 사료효율, 단백질전환효율, 혈액분석 및 전어체분석 결과에서 대조구와 비교하여 유의적인 차이가 없었다. 항산화활성도를 위한 실험사료와 간에서의 DPPH 저해활성 분석결과에서도 모든 실험구 사이에서 유의적인 차이를 보이지않았다. 분석결과에서 유의적인 차이를 보이지 않았지만, 스피룰리나 첨 가구에서 대조구보다 높은 DPPH 저해활성 경향을 보였으며, 생존율은 아스타잔틴 첨 가구에서 84.4%, 대조구에서 60.0%를 보였다. 본 실험 결과, 사료 내 스피룰리나와 아스타잔틴의 0.5%첨가는 넙치치어의 성장과 사료효율, 혈액성상, 체성분 등에 영향을 미치지 않은 것으로 판단된다.

• 대한의생명과학회지
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• 제11권4호
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• pp.503-508
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• 2005

Possible mechanisms of increased serum aryl sulfotransferase (AST) isozyme activities in cholestatic rats were studied. Serum AST-I, II and -III, IV isozymes activities were determined from the experimental rats with common bile duct ligation (CBDL) or choledocho-caval shunt (CCS). The activities of serum AST-I, II and -III, IV isozymes were found to be increased significantly in both the CCS plus taurocholic acid (TCA) injected group, and the CBDL plus TCA group than those in each control group, such as CCS or CBDL alone groups. The above results suggest that the elevated serum AST most likely due to increased hepatocyte membrane permeability caused by TCA mediated liver cell necrosis.

• 한국환경과학회지
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• 제12권6호
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• pp.599-603
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• 2003

This study investigated the effects of Houttuynia Cordata thunb(HCT) administration on the biochemical parameters of function in liver of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) treated rats. Houttuynia Cordata thunb (200mg/kg) was administeres into rats intraperitoneally for four weeks , seven days after the injection of TCDD(1$\mu\textrm{g}$/kg). We examined the antioxidative enzymatic activity by measuring the level of AST, ALT , SOD and Catalase in serum and liver tissue of rats. HCT group showed 49% of inhibitive effect in AST activity compared to TANO group. ALT level of HCT group was decreased to the level of NO group. SOD and Catalase in TANO group were lower than in NO group, but SOD and Catalase in HCT group were increased by 46％ and by 50％ respectively compared to TANO group.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2003년도 생물공학의 동향(XII)
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• pp.571-575
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• 2003

A marine aerobic Gram-negative bacterium, Pseudoalteromonas carrageenovora, has been blown to hydrolyze carrageenans, the sulfated galactans of red algae, and to desulfate oligo kappa-carrageenans. Recently, the gene encoding arylsulfatase (aryl-sulfate sulfohydrolase, E.C.3.1.6.1) of A. carrageenovora was cloned and the nucleotide sequence was reported. Enzymatic hydrolysis of sulfate groups in agaropectin simplifies the process of agarose preparation. In order to overproduce the enzyme, the arylsulfatase gene (astA, 984 bp ORF) from P. carrageenovora genome was amplified by PCR and subcloned into the pET21a vector. When the constructed plasmid pAST-A1 was introduced into E, coli BL21(DE3), the transformant on LB plate containing IPTG showed the hydrolyzing activity for p-nitrophenyl sulfate. Most of arylsulfatase activity was found in the cell lysate, but at $50\;{\sim}\;5000\;{\mu}M$ IPTG concentration the activity was found both in the culture supernatant and the cell lysate. The molecular weight of the recombinant enzyme was estimated to be 34 kDa by SDS-PAGE.

• 약학회지
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• 제33권1호
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• pp.54-63
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• 1989

Examination of the subacute toxicity of captafol showed that. 1) In the captafol administered group, the body weight was significantly decreased but the amounts of AST, ALT, LDH, BUN, TG in serum were remarkably elevated in comparision to those of the control group. 2) In captafol treated animals, the amount of cytochrome P-450 and the activity of NADPH-cytochrome c reductase in liver and in kidney were decreased, but TAB value in serum and in liver and total ATPase activity in liver and in kideny were found to be remakably elevated. 3) When captafol administered with ethanol to the group, the group showed elevated serum levels of AST, ALT and BUN but the amount of cytochrome P-450 and the activity of NADPH-cytochrome c reductase in liver and in kidney were decreased as the group which was treated with captafol only.