The study was performed to see the effects of coenzyme Q10 (CoQ10) on blood biochemical components and hepatic antioxidant system in rats exposed to lipopolysaccharide (LPS)-induced toxicity. A total of 24 rats were allocated to four groups: control (CON), 100 mg/kg BW of LPS (LPS), 100 mg of CoQ10/kg BW with LPS (LCQI) and 300 mg of CoQ10/kg BW with LPS (LCQII). The LPS and LCQI groups showed a significant (P<0.05) increase in the relative spleen weight compared with the CON group without affecting body and liver weights. The blood alanine aminotransferase (ALT) level in the LPS group was significantly (P<0.05) greater than that in the CON group, while supplementation with 100 or 300 mg CoQ10 to rats injected with LPS normalized the ALT level in the CON group. In antioxidant systems, the LPS group showed a significantly (P<0.05) higher mRNA and activity of superoxide dismutase (SOD) than the CON group. The supplementation with CoQ10 to the LPS-treated group normalized the level of SOD, which was comparable to the level of the CON group. Both the mRNA expression and activity of glutathione peroxidase in the LCQI and LCQII groups were higher (P<0.05) than that of the LPS group. However, administration of LPS or CoQ10 unaffected the level of catalase and total antioxidant power. The level of lipid peroxidation in the LCQII group was lower (P<0.05) than that in the LPS group. In conclusion, CoQ10 exerted its favorable effect against liver damage by modulation of antioxidant enzymes in LPS treated rats.

The present study was conducted to investigate the effects of two dietary lutein sources such as the commercial lutein and the emulsified crude extract of spinach containing lutein on the transfer of lutein into egg yolks as well as the antioxidant defense system in the liver of laying hens. A total of thirty-six, 24-week-old White leghorn hens were randomly assigned to a basal diet (CON) and that supplemented with a commercial lutein (LUT, 40 mg lutein /kg of diet) and the crude extract of spinach dissolved into oils with lecithin (ECE, 40 mg lutein/kg of diet) for 5 weeks. There was no difference in body weight and the relative live weight among dietary groups. The concentration of egg yolk lutein and yolk color significantly increased (P＜0.05) in the LUT and ECE groups compared with the CON group. The LUT group showed a higher yolk lutein and much a lower variability of average yolk lutein content, although there was no significant difference in egg yolk lutein content between the LUT and ECE groups. In antioxidant activity, the specific activity of hepatic superoxide dismutase (SOD) in the LUT group was significantly (P＜0.05) greater than that in the CON and ECE groups, whereas glutathione peroxidase (GPX) and glutathione Stransferase (GST) activities and lipid peroxidation were not affected by dietary sources of lutein. In conclusion, the dietary supplementation of lutein and the emulsified crude extract of spinach to laying hens resulted in a significant increase in the content of egg yolk lutein and yolk color, indicating that both supplements may potentially be applicable for the production of egg-enriched lutein in laying hens. This study also suggest that a commercial lutein more consistently produces the quality of lutein-enriched eggs and improves hepatic SOD activity compared with the emulsified crude extract of spinach.

The current study was performed to investigate the effects of dietary supplementation of dried coffee meal (CM) on growth performance, intestinal and blood biochemical index, intestinal enzymes, and cecal microbial populations. A total of 162, 3-day-old male broiler chicks were randomly allocated into three dietary groups: control group (CON), basal diet added with 0.5% CM (CM I), and basal diet added with 1.0% CM (CM II). Dietary supplementation of CM did not change bird performance and the relative weight of intestinal mucosal tissues. The birds fed the diet supplemented with CM (0.5 and 1.0%) significantly decreased mucosal glucose concentration (P<0.05) without affecting blood glucose level compared with those fed control diet. The level of blood aspartate aminotransferase (AST) significantly increased in CM II group (P<0.05) without affecting γ-glutamyl transpeptidase (γ-GTP) compared with that in the CON group. The specific activity of intestinal maltase, leucine aminopeptidase (LAP) and alkaline phosphatase (ALP) were not affected by dietary supplementation of CM, whereas sucrase activity in birds fed the diet supplemented with CM was decreased (P<0.05) compared to that in the control birds. The colony forming units (CFU) of E. coli in the cecum of CM-fed birds was significantly decreased (P<0.05) compared with that of control birds without changing the CFU of Lactobacillus. In conclusion, dietary supplementation of lower level of CM (0.5%) can be used as a beneficial feed resource without liver toxicity in broiler chicks.(Key words: coffee meal, broiler, biochemical profiles, intestinal enzymes, antimicrobial activity) † To whom correspondence should be addressed : isjang@gntech.ac.kr 농산식품부산물 중에서 커피 원두는 국내에서 2012년 한 해 동안 약 11.5만 톤이 수입되어 소비량과 부산물의 생산량 이 급격히 증대되었다. 커피액을 추출하고 남은 부산물인 커 피박은 조단백질 10%, 조섬유 23%, 조지방 6% 정도로서, 커 피 원두에는 항산화 물질인 polyphenol 화합물이 약 8% 정

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