• 대한의생명과학회지
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• 제11권4호
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• pp.517-523
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• 2005

The purpose of this study was to determine the effect of rat intestinal a-glucosidase inhibitor; methanol $(80\%)$, ethanol $(80\%)$ and water extract of Schizandra chinensis in Korea (KS: Schizandra chinensis in Korea) and China (CS: Schizandra chinensis in China). When the final concentration was 1 mg/ml for each sample (KS and CS), methanol extract of KS ($IC_{50}$ 1.62 mg/ml) showed $46.8\%$, ethanol extract of KS ($IC_{50}$ 1.48 mg/ml) showed $47.4\%$, water extract of KS ($IC_{50}$ 1.72 mg/ml) showed $46.3\%$ and methanol extract of CS ($IC_{50}$ 8.35 mg/ml) showed $13.3\%$, ethanol extract of CS ($IC_{50}$ 8.05 mg/lml) showed $16\%$, water extract of CS ($IC_{50}$ 8.37 mg/ml) showed $11.54\%$ of inhibitor for p-nitrophenyl $\alpha-D-glucopyranoside$ (pNPG) $\alpha-glcosidase$ activity, respectively. And the contents of total phenol, flavonoid of Schizandra chinensis were measured. When the final concentration was 1mg/ml for each sample (KS and CS), total phenol and flavonoid in KS were higher than CS, respectively. The order superoxide dismutase (SOD) activity $IC_{50}$ values of each solvent extracts of KS were: 2.006 mg/ml methanol extract, 2.304 mg/ml ethanol extract and 2.5 mg/ml water extract, which were higher than that of each solvent extracts CS as: 2.881 mg/ml methanol extract, 3.085 mg/ml ethanol extract and 3.190 mg/ml water extract.

• Environmental Analysis Health and Toxicology
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• 제21권2호
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• pp.115-126
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• 2006

This study was conducted to find out survival rate, activity, growth and change of the organ structure of bivalves exposed to heavy metal. The results of the study confirmed that zinc (Zn) induces reduction of survival rate and activity, abnormality of organ structure of the equilateral venus, Gomphina veneriformis. Experimental groups were composed of one control condition and three Zn exposure conditions ($0.64mg\;Zn{\iota}^{1},\;1.07mg\;Zn{\iota}^{-1},\;1.79mg\;Zn{\iota}^{-1}$). As the concentration of zinc increased the accumulation of lipofucin increased in the digestive gland. Survival rate was the lowest in the lowest Zn exposure group at $0.64mg;Zn{\iota}^{-1}$. Growth was not significantly different between the control and exposure group. Activity. with the exception of the lowest Zn exposure group at $0.64mg\;Zn{\iota}^{-1}$, was similar between the control and exposure group. Histological analysis of organ system illustrated expansion of hemolymph sinus, loss of striated border of inner epidermis, increase in the number of mucous cell in the mantle. Also, histological degenerations as epithelial necrosis and hyperplasia of mucous cells are recognized in the gill and foot.

• 한국수산과학회지
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• 제49권4호
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• pp.445-453
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• 2016

Seahorse Hippocampus abdominalis a marine teleost fish, has long been used as one of the essential materials in traditional Chinese medicine. However, the uses of seahorse have been limited due to its high cost, despite its beneficial biological activities. Seahorse has not been widely explored for its biofunctional properties and active components. In the present study, the enzymatic hydrolysates of seahorse were prepared by using two digestive enzymes (trypsin and pepsin) and five food grade enzymes (neutrase, protamex, alcalase, kojizyme, and flavourzyme). The enzymatic hydrolysates indicated higher hydrolysis yields than its water extract. Among them, the distilled water-pepsin hydrolysate (DP) which was obtained by distilled water extraction followed by pepsin hydrolysis, showed the highest yield and protein content as well as the highest alkyl radical scavenging activity. Also, it provided protective effects against oxidative stress induced by AAPH in vero cell and zebrafish. Further fractionation based on the molecular weight was carried out to identify it’s active components, and < 5 kDa (less than 5 kDa) molecular weight fraction was confirmed to have the highest antioxidant activity. In conclusion, this study suggests that DP of seahorse has antioxidant properties, and might be a novel and useful material from the marine origin for healthy functional foods and cosmetics.

• 한국양식학회지
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• 제19권1호
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• pp.1-6
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• 2006

흰다리새우 양식기법의 최적화를 위하여 소화기간 동안의 간췌장, 전장 그리고 중장에서의 trypsin의 활성변화를 조사하였다. 체중에 대한 전장, 중장의 무게 그리고 그 무게 합의 비율은 섭취된 먹이의 이동 및 소화과정을 나타내는 지표로서 공급량과 잔류량에 의한 먹이섭취량을 측정하는 것 보다 더 정확한 지표로서 사용 가능하였다. 평균적으로 치대 먹이섭취량은 전장에서 먹이섭취 후 30분 이내에 체중에 0.3%로 나타났다. 또한 30분 이후부터 전장이 비워지기 시작되었으며 중장의 무게가 최대에 이르는 시각은 2시간째였다. $3{\sim}5$시간 후에는 먹이가 배설됨으로 인하여 중장의 체중에 대한 무게비가 감소하였으나 전장에서는 비교적 같은 비율을 유지하였다. 먹이섭취에 의한 trypsin활성변화는 간췌장에서 가장 커서 전장에서의 활성변화에 비하여 약 3배로 나타났다. 소화시간이 지날수록 간췌장에서의 trypsin 활성은 지속적으로 증가하였다. 전장에서의 trypsin 효소의 활성은 중장보다 약 $2{\sim}3$배정도 높았다 먹이섭취 후 2시간이 지났을 때 trypsin 활성은 303 n mol/mg/min였고, 4시간까지 이 활성이 유지($277{\sim}306$ n mol/mg/min)되었으며, 그 후에는 점차 감소하였다. 중장에서는 typsin 활성이 먹이를 섭취하여 한 시간이 지나면서 $65{\pm}29$ (SE) n mol/mg/min로 증가하였다. 그 이후에는 $80{\sim}97$ n mol/mg/min의 범위를 나타내었으며, 5시간이 경과하였을 때 $52{\pm}17$ (SE) n mol/mg/min로 감소하였고 소화관내에 잔류하고 있는 먹이 량은 최대 섭취량의 50%로 나타났다.

• 한국수산과학회지
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• 제35권2호
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• pp.185-190
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• 2002

강원 북부연안에 많이 서식하는 명주조개 (C. antiquafa)를 대상으로 중장선의 미크로좀을 in vitro로 유기주석화합물 (TBTO, TBTC, TPTC)과 배양하여 약물대사효소계의 cytochrome P450 (CYP)과 7-ethoxyresorufin-O-deethylase (EROD)의 변화를 조사하였다. 그 결과, 이들 화합물은 모두 명주조개의 약물대사효소계를 짧은 시간 내에 저해한다는 것을 확인하였다. 즉,미크로좀을 0.4 mM 농도의 TBTC, TBTO 및 TPTC와 20분간 배양한 후의 CYP 함량은 첨가하기 전에 비해 각각 $52\%$, $72\%$ 및 $40\%$로 줄었는데, 이것으로 화합물의 종류에 따라서 저해 정도는 차이가 있었고 butyltin화합물보다는 phenyltin화합물의 저해 정도가 더 컸다. 그리고 EROD 활성의 경우도 0.4 mM의 TBTC, TBTO 및 TPTC와 20분 간 배양하였더니 각각 $100\%$, $92\%$ 및 $85\%$로 butyltin 화합물보다 는 phenyltin 화합물의 저해가 더 컸다. 한편, TBTC, TBTO 및 TPTC 모두는 패류 중장선의 CYP와 EROD 활성을 농도의존적으로 저해하였으며, 그리고 두 효소는 모두 오염물질에 노출된 패류의 좋은 생체지표 (bioindicator)로 활용할 수 있을 것이라 여겨진다.

• 한국양식학회지
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• 제18권4호
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• pp.245-251
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• 2005

본 연구는 rotifer, B. rotundiformis를 대상으로 소화효소 실험을 하기 위해 이들이 가지고 있는 소화효소의 최고 활성 조건을 확인하기 위해 수행하였다. rotifer, B. rotundiformis의 $\alpha$-amylase, total alkaline Protease, trypsin 및 TG-lipase는 Tris-HCl buffer 보다 phosphate-NaOH buffer 안정적인 효소활성을 보였다. $\alpha$-amylase, trypsin 및 TG-lipase는 pH 8.0에서, total alkaline proteaset pH 7.0에서 높은 효소 활성을 나타내었다. $\alpha$-amylase 활성은 $40^{\circ}C$에서 가장 높은 활성을 보였으며, total alkaline pretense와 trypsin은 $55{\~}60^{\circ}C$의 온도에서 높은 활성을 나타내었다. 반면 TG-lipase 활성은 $25{\~}30^{\circ}C$의 낮은 온도에서 활성이 높았다. $\alpha$-amylase, total alkaline pretense, trypsin 및 TG-lipase의 활성의 적정 기질 농도는 $3.5\%$ starch, $\0.6%$ azo-casein, $87.5{\mu}M$ BApNA and 81.2 mM olive oil이었다. $\alpha$-amylase, total alkaline protease, trypsin 및 TG-lipase의 활성의 적정 반응시간은 40, 60, 30 and 25 min으로 나타났다. 본 연구 결과에서 얻어진 자료는 rotifer, B. rotundiformis의 소화효소 연구를 위한 기초 자료로 이용될 것이다.

• Asian-Australasian Journal of Animal Sciences
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• 제22권12호
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• pp.1667-1675
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• 2009

This study was conducted to determine whether L-arginine (Arg) supplementation could improve intestinal function in weaned pigs after an Escherichia coli lipopolysaccharide (LPS) challenge. Treatments included: i) non-challenged control (CONTR, pigs fed a control diet and injected with sterile saline); ii) LPS-challenged control (LPS, pigs fed the same control diet and challenged by injection with Escherichia coli LPS); iii) LPS+0.5% Arg (pigs fed a 0.5% Arg diet and challenged with LPS); and iv) LPS+1.0% Arg (pigs fed a 1.0% Arg diet and challenged with LPS). On d 16, pigs were administrated with LPS or sterile saline. D-xylose was orally administrated at 2 h following LPS challenge, and blood samples were collected at 3 h following LPS challenge. At 6 h post-challenge, pigs were sacrificed and intestinal mucosa samples were collected. Supplementation of Arg attenuated LPS-induced damage in gut digestive and barrier functions, as indicated by an increase in ileal lactase activity, and duodenal and ileal diamine oxidase activities (p<0.05). Arg administration also prevented the increase of jejunal malondialdehyde content and the decrease of ileal superoxide dismutase activity by LPS challenge (p<0.05). Furthermore, the jejunal nitric oxide level and inducible nitric oxide synthase activity were also improved after Arg supplementation (p<0.05). These results indicate that Arg supplementation has beneficial effects in alleviating the impairment of gut function induced by LPS challenge.

• 동의생리병리학회지
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• 제17권1호
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• pp.146-150
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• 2003

It had been known for a while that Crataegi Fructus(CF; Crataegus pinnatifida Bunge) had only a digestive effect. Recently, it has been demonstrated that CF also has an anti-hypertensive effect. However, its mechanism of relaxant effect has not been investigated yet. This study was examined to investigate the mechanism of vascular relaxation effect of CF in isolated rat thoracic aorta. CF revealed significant relaxation to phenylephrine(PE)-induced arterial contraction but much less to KCI-induced one. When CF was pretreated, it inhibited PE-induced contraction non-competitively. Methylene blue(10/sup -6/M) completely blocked the relaxant effect of CF whereas L-NAME(10/sup -5/M) did almost completely. However, atropine(10/sup -6/M) did not have any influence on vascular relaxation effect of CF. Regarding cNOS activity, CF significantly increased its activity from rat whole brain homogenate in a dose dependent manner which was inhibited by L-NAME(10/sup -5/M). On the other hand, CF did not affect on expression of TNF-α mRNA in RAW 264.7 cells, suggesting that CF is not related to iNOS activity. These results indicate that CF would be effective in relaxing vascular contraction through release of endothelial nitric oxide.

• 한국발생생물학회지:발생과생식
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• 제17권4호
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• pp.451-459
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• 2013

The biological activity of tissue specific stem cell is under the control of their specific microenvironment and the exogenous chemicals derived from digestive tract can be one of the constructing factors of that. It is suggested that the extract of brown algae Ishige okamurae has antioxidant-, apoptosis induction-, and antiinflammatory-effects. On the other hand, a few studies have shown that antioxidant assist inhibition of accumulation of fat. So we studied the effect of the extract of I. okamura on the cellular activity and differentiation of 3T3-L1 preadipocyte to adipose cell. The viability of cell was analyzed using 3-[4,5-dimethylthiazo-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) assay. Adipogenesis of 3T3-L1 cell was analyzed after induction in the induction medium containing the I. okamurae extract. The cellular activity was high compared with the vehicle and 0.05 mM caffeine in all groups of I. okamurae extract treated cells. The extract of I. okamura inhibited accumulation of lipids in 10 and $50{\mu}g/ml$. The expression of the marker genes for adipocyte differentiation coincided with cytochemical results. These results suggest that the extract of I. okamurae increases the cellular viability of adipose precursor cells. On the other hand, it suppresses the differentiation of preadipocyte to adipocyte and accumulation of lipids in concentration-dependent manners. It may be possible that the major component of the extract can be applied in the control of adipose tissuegenesis.

• Asian-Australasian Journal of Animal Sciences
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• 제21권4호
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• pp.582-589
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• 2008

This study attempted to determine effects of recombinant porcine epidermal growth factor (pEGF) and glutamine (Gln) supplement on the growth performance and intestinal development of piglets weaned at 14 days of age. A total of ninety-six piglets were allotted to one of four dietary treatments which comprised inclusion of 1.0 mg pEGF supernatant/kg diet or 0.5% Gln both alone and in combination. Each treatment consisted of four replicates with six pigs per pen for a 28 days experimental period. Two pigs per replicate were sacrificed and gastrointestinal tract samples were collected on day 14. Data showed that dietary treatment failed to promote growth performance. On day 14, diets supplemented with pEGF elevated pancreatic chymotrypsin, jejunal alkaline phosphatase, sucrase, lactase and maltase activities (p<0.05), but failed to alter the small intestinal villus morphology, DNA, or protein content of gastrointestinal mucosa. Diets supplemented with Gln increased pancreatic chymotrypsin activity, tended to enhance the protein contents of gastric (p = 0.08) and jejunal mucosa (p = 0.09) but did not influence the serum IgA level or the enzyme activity in the gastrointestinal tract. On day 28, the diets supplemented with Gln increasedt (p<0.05) serum IgA and the proliferation of peripheral blood mononuclear cells by PHA stimulation. However, a combination of pEGF and Gln did not have a synergistic effect on these biomarkers in early-weaned piglets. The results demonstrate that diets supplemented with recombinant pEGF supernatant indeed improve intestinal digestive enzyme activity and diets supplemented with Gln increases the immune response in early-weaned piglets.