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In Vitro cytotoxicity에 의한 Draize score 측정 체계 수립 (The estimation of Draize score by in vitro cytotoxicity using continuous cell lines)

  • 정민석;최종완
    • 대한화장품학회:학술대회논문집
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    • 대한화장품학회 1996년도 4차 심포지움(Skin Biology Efficacy)
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    • pp.33-51
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    • 1996
  • 화장품의 변질요인은 크게 물리적 또는 화학적 변화에 의한 요인과 미생물오염으로 인한 각종 문제점으로 대별될 수 있다. 이 중에서 미생물 오염문제는 제품의 상품가치에 미치는 영향 뿐만 아니라 지속적인 사용에 의한 피부의 위생적 측면때문에 그 중요성에 대한 인식이 높아지고 있다. 따라서, 제품개발시는 화장품 처방중의 영양성분의 배합, pH, 유화형태, 방부제의 혼합, 분배계수 및 그 안정성을 고려하여야 함은 물론이고 처방중의 모든 원료의 각각에 대한 항균능 및 피부자극여부를 사전에 미리 조사하여 각 제품별로 적당한 방부체계를 선택하는 것은 매우 중요한일이다. 독성실험방법에 있어서 in vivo 실험에 대체할 수 있는 새로운 in vitro 실험방법 수립 즉, 동물실험을 하지 않고 in vitro 실험결과로부터 in vivo 결과를 예측할 수 있도록 새로운 in vitro 실험체계의 가능성을 실험하였다. 4종의 cell line중 transformed mouse fibroblast L929가 본 실험에서 사용하기에 배양상의 용이성과 안정성, 재현성의 관점에서 가장 알맞은 cell line이었다. transformed mouse fibroblast L929를 사용한 NR$_{50}$ assay와 Draize score간의 regression coefficient ${\gamma}$값은 0.91이었다. 혈청은 시험물질의 세포에 대한 민감성에 영향을 주었다. 따라서, modified serum-free method를 이용함으로써 regression coefficient가 증가된 즉, 상관성 및 재현성이 높은 결과를 얻을 수 있었다. 이러한 기술은 독성실험에 실험동물을 사용하지 않고 in vivo test에 대체 할 수 있고, 또한 화학물질에 대한 prescreening으로 이용할 수 있을 것으로 판단된다.원과 섭식장소, 수중생물의 경우는 특히 수온, 수량 영양원등이다.(중략). 본 연구의 접근방법으로는 ASRS의 개념적인 Reference Model을 수립하고 이 Reference Model에 대한 Formal Model로 DEVS(Discrete Event System Specification)을 이용하여 시스템을 Modeling하였다. 이의 Computer Simulation을 위하여 DEVS형식론 환경에서의 Simulation Language인 DEVSim ++ⓒ를 이용하여 시스템을 구현하였다.. 실형 결과로는 먼저 선형 상미분방정식의 예로 mass-damper-spring system, 비선형 상미분방정식의 예로는 van der Pol 방정식, 연립 상미분방정식의 예로는 mixing tank problem 등을 보였으며, 그의 공학에서 일어나는 여러 가지 문제들도 다루었다.화물에 대한 방어력이 증가되어 나타난 결과로 여겨지며, 또한 혈청중의 ALT, ALP 및 LDH활성을 유의성있게 감소시키므로서 감잎 phenolic compounds가 에탄올에 의한 간세포 손상에 대한 해독 및 보호작용이 있는 것으로 사료된다.반적으로 홍삼 제조시 내공의 발생은 제조공정에서 나타나는 경우가 많으며, 내백의 경우는 홍삼으로 가공되면서 발생하는 경우가 있고, 인삼이 성장될 때 부분적인 영양상태의 불충분이나 기후 등에 따른 영향을 받을 수 있기 때문에 앞으로 이에 대한 많은 연구가 이루어져야할 것으로 판단된다.태에도 불구하고 [-wh]의미의 겹의문사는 병렬적 관계의 합성어가 아니라 내부구조를 지니지 않은 단순한 단어(minimal $X^{0}$ elements)로 가정한다. 즉, [+wh] 의미의 겹의문사는 동일한 구성요 소를 지닌 병렬적 합성어([$[W1]_{XO-}$ $[W1]_{XO}$ ]

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$CCl_4$를 투여한 랫드에서 헛개나무 열수추출물의 지질과산화 억제와 신기능 개선 작용 (Water Extract of Hovenia dulcis Suppressed Lipid Peroxidation and Improved Renal Function in $CCl_4$ Intoxicated Rats)

  • 박연우;양시용;이민경;진주영;조정희;김기영
    • 동의생리병리학회지
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    • 제18권3호
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    • pp.868-873
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    • 2004
  • Renal dysfunction could be developed as the secondary disease of liver cirrhosis. Delayed or suppresed lipid peroxidation by the treatment with physiological active substances could be explained as the antioxidative and protective effect in tissue damage. In this study, we investigated an antioxidative effect and renal function improvement of Hovenia dulcis in liver fibrosis(cirrhosis) induced rats. The female Sprague-Dawley rats (180∼210 g) were divided into 3 groups (Normal, AC: CCl₄ mixture treated group, AC-HV: CCl₄ mixture+ Hovenia dulcis treated group) and renal damage was developed by CCl₄ mixture administration in 4 weeks (0.8 ㎖/rat). The tissue of kidney and liver and sera were used for quantitative measurement of enzyme activity, MDA and Hyp. The histological change and gene expression of collagen α1(III) mRNA and a1(IV) mRNA were observed by Masson's trichrome staining and RT-PCR. As a result, the clinical biochemical parameters of liver function (AST and ALT) in sera of AC-HV group showed significantly 46.4% and 104.8% lower (p<0.005), and the level of ALP and BUN as the parameter of protein urine and azotemia showed 17.8 % and 25.8 % lower than in AC group. In AC-HV group, the concentration of MDA in kidney and liver was decreased significantly 15.8% and 21.3% when compared with AC group (p<0.01 -0.005). The content of Hyp in kidney of AC-HV group is merely higher than in AC group, in contrast to liver tissue. The expression of collagen α1(III) mRNA and collagen α1(IV) mRNA was decreased in AC, but both of collagen mRNA in normal and AC-HV group expressed fast similar. More massive lipid droplets, thicker collagen fiber bundles in portal triads and more formation of portal central septum were observed in the liver of AC group than in AC-HV group. In conclusion, CCl₄ mixture intoxication could be developed not only liver fibrosis(cirrhosis) but also renal dysfunction by the massive lipid peroxidation and suppression of interstitial collagen and basement membrane collagen synthesis. And the water extract of Hovenia dulcis may be possessed the antioxidative and protective effect and improvement of kidney function in renal dysfunction induced rats.

크롬 노출에 따른 숭어, Mugil cephalus의 혈액성분 변화 (Changes of Hematological Constituents in the Mullet, Mugil cephalus Exposed to Chromium)

  • 안태영;정달상;김준환;강주찬
    • 한국어병학회지
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    • 제26권2호
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    • pp.89-97
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    • 2013
  • 크롬은 여러 산업으로 배출되어 수 환경을 오염시키는 주요 중금속 중 하나이며, 특히 Cr(VI)은 수용액 내에서 주로 크롬산 이온으로 존재하며, 생체막을 쉽게 통과하여 산화 스트레스 및 생체 축적을 일으킨다. 따라서 본 연구는 숭어를 대상으로 그들의 혈액성분의 변동에 미치는 크롬의 영향을 검토하였다. RBC count 및 Ht 값은 $50{\mu}g/L$ Cr 농도에서 유의적인 감소를 나타냈으나, Hb 농도의 유의한 변동은 관찰되지 않았다. 혈청 칼슘농도는 $50{\mu}g/L$ Cr의 농도에서 유의적인 감소를 보였고, 마그네슘농도는 $100{\mu}g/L$ Cr의 농도에서 유의적인 증가를 보였다. Glucose 및 total protein 농도는 가장 높은 크롬농도인 $200{\mu}g/L$ Cr에서 유의적인 증가를 보였으나, 중성지방인 triglyceride 농도는 노출기간 동안 유의한 변화가 관찰되지 않았다. GOT 및 GPT 활성은 $100{\mu}g/L$ Cr 이상의 농도에서 유의적인 증가를 보였고, ALP활성은 가장 높은 크롬농도인 $200{\mu}g/L$ Cr에서 유의적인 증가를 보였다. 이상의 결과는 숭어의 혈액성상과 혈청 무기성분은 크롬 농도 $50{\mu}g/L$ 이상, 혈청유기성분과 효소성분은 크롬농도 $100{\mu}g/L$이상에서 변동이 나타나는 것으로 결론 내릴 수 있다.

왕부류행(王不留行)과 경엽여루채(硬葉女婁菜)가 알콜 투여로 유발된 흰쥐의 고지혈증과 간 손상의 예방에 미치는 영향 (Preventive effects of Saponariae Vaccariae Semen and Melandryi Firmi Herba on hyperlipidemia and liver damage induced by alcohol)

  • 최재영;서부일;오달석;박지하;노성수
    • 대한본초학회지
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    • 제27권1호
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    • pp.27-34
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    • 2012
  • Objectives : This study was performed to compare the preventive effect of water extracts from Saponariae Vaccariae Semen(SVS) and Melandryi Firmi Herba(MFH) on hyperlipidemia and liver damage induced by alcohol. Methods : Except for the normal group, I fed rat on 25% alcohol for 55 days. And each extract was administrated for the same period. I measured the serum component in rat's blood, body weight and weight of liver. Results : At first, I observed effects of SVS and MFH on hyperlipidemia induced by alcohol. SVS and MFH group didn't show the significant decrease of total cholesterol in comparison with those of the control group. SVS and MFH group showed the significant increase of HDL-cholesterol in comparison with those of the control group. SVS group showed the significant decrease of triglyceride in comparison with those of the control group, but MFH group didn't show the significant decrease of triglyceride in comparison with those of the control group. SVS group showed the significant increase of body weight in comparison with those of the control group at 4weeks and 8weeks. But, MFH group didn't show the significant changes of body weight in comparison with those of the control group at 4weeks and 8weeks. By the way, SVS group showed the significant decrease of triglyceride in comparison with those of MFH group. SVS group showed the significant increase of body weight in comparison with those of MFH group at 8weeks. At second, I observed effects of SVS and MFH on liver damage induced by alcohol. SVS and MFH group showed the significant decrease of AST(aspartate aminotransferase), ALT(alanine aminotransferase), ALP(alkaline phosphatase) and LDH(lactate dehydrogenase) in comparison with those of the control group. SVS group showed the significant increase of liver weight in comparison with those of the control group, but MFH group didn't show the significant increase of liver weight in comparison with those of the control group. By the way, SVS group showed the significant increase of liver weight in comparison with those of MFH group. Conclusions : Reviewing these experimental results, it suggests that water extracts from SVS and MFH have pharmaceutical preventive efficacy on hyperlipidemia and liver damage induced by alcohol. Therefore further additional study should be conducted to elucidate the pharmaceutical efficacy of these in depth.

Effects of Dietary Zinc on Performance and Immune Response of Growing Pigs Inoculated with Porcine Reproductive and Respiratory Syndrome Virus and Mycoplasma hyopneumoniae

  • Roberts, E.S.;Heugten, E. van;Spears, J.W.;Routh, P.A.;Lloyd, K.L.;Almond, G.W.
    • Asian-Australasian Journal of Animal Sciences
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    • 제17권10호
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    • pp.1438-1445
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    • 2004
  • The objective of this study was to determine the effects of dietary Zn level on performance, serum Zn concentrations, alkaline phosphatase activity (ALP), and immune response of pigs inoculated with Porcine Reproductive and Respiratory Syndrome virus (PRRSv) and Mycoplasma hyopneumoniae. A $2{\times}4$ factorial arrangement of treatments was used in a randomized design. Factors included; 1) PRRSv and M. hyopneumoniae inoculation (n=36 pigs) or sham inoculation (n=36 pigs) with media when pigs entered the grower facility (d 0) at 9 weeks of age and 2) 10, 50, 150 ppm supplemental Zn sulfate (${ZnSO}_4$) from weaning until the completion of the study, or 2,000 ppm supplemental ${ZnSO}_4$for two weeks in the nursery and then supplementation with 150 ppm ${ZnSO}_4$for the remainder of the trial. The basal diet contained 34 ppm Zn. Pigs were weighed on d 0, 10, 17, 24 and 31 and blood samples were collected on d 0, 7, 14, 21 and 28. Pigs inoculated with PRRSv were serologically positive at d 28 and control pigs remained negative to PRRSv. In contrast, the M hyopneumoniae inoculation was inconsistent with 33.3% and 52.8% of pigs serologically positive at d 28 in the control and infected groups, respectively. A febrile response was observed for approximately one week after inoculation with PRRSv. Feed intake (p<0.01) and gain (p<0.1) were less in PRRSv infected pigs than control pigs for the 31 d study. However, performance did not differ among pigs in the four levels of ${ZnSO}_4$. Assessments of immune responses failed to provide unequivocal influence of either PRRSv inoculation or ${ZnSO}_4$level. These data suggest that PRRSv and M. hyopneumoniae act to produce some performance deficits and the influence of Zn supplementation of nursery age pigs does not have clear effect in grower pigs affected with disease.

족삼리(足三里) 전침(電鍼)이 흰쥐의 노화(老化)에 미치는 영향(影響) (A Study on Anti-aning of Electroacupuncture at Joksamni($ST_{36}$) in Rats)

  • 이준성;임윤경;김영일
    • Journal of Acupuncture Research
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    • 제24권3호
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    • pp.145-161
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    • 2007
  • Objectives : The purpose of this study is to investigate the effect of electroacupuncture at Joksanmi($ST_{36}$) on Rat's aging by experimental methods. Methods : The author performed several experimental procedures to observe the effects of the EC-HAS at the arthritis. First, I measured the cell survival rate of the mice lung fibroblasts. Second, the incidence rate of arthritis and arthritis index of CIA were analyzed. Third, the levels of IL-6, $INF-{\gamma}$ , $INF-{\alpha}$ , $IL-1{\beta}$, IgG, IgM and anti-collagen II were measured in serum and the level of $INF-{\gamma}$, $INF-{\gamma}$/IL-4 ratio in the CIA mouse spleen cell culture. Fourth, histological analysis of the mice joint was performed. Fifth, the expression ratio of $CD3e^+$ cells to $CD19^+$ cells, $CD4^+$ cells to $CD8^+$ cells, $CD11a^+CD19^+$ cells, $CD4^+CD25^+$ cells, $CD3^+CD69^+$ cells, and $CD11b^+Gr-1^+$ cells were checked. Results: 1. The hematocrit was meaningfully (p<0.01, p<0.05) decreased in $ST_{36}$ group in comparison with the control and sham group. 2. The glucose, ALP were meaningfully (p<0.05, p<0.05) decreased in $ST_{36}$ group in comparison with the control group. 3. In the activation of hepatic antioxidase, the catalase was meaningfully (p<0.01) increased in $ST_{36}$ group in comparison with the control group. 4. In the liver, the NO formation was meaningfully (p<0.001) decreased in $ST_{36}$ group in comparison with the nomal, control and sham group. 5. In the activation of splenetic antioxidase, the GSH was meaningfully (p<0.01) increased in $ST_{36}$ group in comparison with the sham group, and the catalase was meaningfully (p<0.001) increased in $ST_{36}$ group in comparison with the control group. 6. In the spleen, the MDA formation was meaningfully (p<0.01, p<0.05) decreased in $ST_{36}$ group in comparison with the control and sham group. 7. In the spleen cell culture, the levels of IL-6 was meaningfully (p<0.05) decreased in comparison with the sham group, $INF-{\gamma}$( was meaningfully (p<0.05) increased in comparison with the control group. Conclusions: According to the results, it is considered that electroacupuncture at Joksamni($ST_{36}$) is effective in increasing the activities of antioxidative enzyme and inhibiting lipid peroxides, and has an immunomodulatory reaction. In conclusion, it han an significant anti-aging effect and need more experimental study.

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표고버섯 추출액이 loperamide로 유도된 변비에 미치는 영향 (Effects of Lentinus edodes Extract on the Loperamide-induced Constipation in Rats)

  • 진영건;김동건;진주연;이영재;박민경
    • 한국식품과학회지
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    • 제39권1호
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    • pp.88-93
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    • 2007
  • 표고버섯 추출액을 10, 20 및 40%로 30일간 음용수에 섞어 실험동물에 투여하고 실험 28-30일에 loperamide(4 mg/kg/day, s.c.)로 변비를 유도한 뒤 표고버섯 추출액의 변비 예방효과를 측정하였다. Loperamide를 단독 투여한 군은 정상 대조군과 비교하여 변의 개수 및 중량이 유의적으로 감소하였으며 원위 결장 내 변잔류의 증가 및 cecocolonic segment의 무게가 증가하였다. 표고버섯 추출액 및 loperamide를 투여한 군은 loperamide를 단독 투여한 군과 비교하여 변의 개수 및 중량이 유의적으로 증가하였으며 원위 결장 내 잔류 변 및 cecocolonic segment의 무게도 감소하였다. 이러한 결과는 표고버섯 추출액이 in vivo에서 변비 개선효과가 있음을 보여준다. 변의 수분함량은 실험군 간의 유의한 차이가 없었지만 loperamide에 의한 변비 유발 시 감소하는 경향이 있었으며, 표고버섯 추출액 투여군에서는 변의 수분함량 감소가 다소 완화되었다. 한편, 혈 중 WBC, RBC, HGB, HCT, PLT, MCV, MCH, MCHC치 및 혈청 ALT, AST, ALP, BUN 및 creatinine 수치는 정상 대조군, loperamide 처리군 및 표고버섯 추출액 처리군 사이에서 차이가 없었다. In vitro 실험결과, 회장 적출 절편에 표고버섯 추출액 동결건조물(0.5 mg/mL)을 전 처리 시 loperamide에 의한 장력과 진폭 억제가 부분적으로 차단되었으며, atropine에 의해 유도된 진폭의 억제도 효과적으로 차단되었다. 이러한 결과는 표고버섯 추출물의 변비 개선효과가 장의 운동성 촉진과 관련이 있음을 시사한다.

Antioxidant and hepatoprotective effects of Korean ginseng extract GS-KG9 in a D-galactosamine-induced liver damage animal model

  • Jo, Yun Ho;Lee, Hwan;Oh, Myeong Hwan;Lee, Gyeong Hee;Lee, You Jin;Lee, Ji Sun;Kim, Min Jung;Kim, Won Yong;Kim, Jin Seong;Yoo, Dae Seok;Cho, Sang Won;Cha, Seon Woo;Pyo, Mi Kyung
    • Nutrition Research and Practice
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    • 제14권4호
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    • pp.334-351
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    • 2020
  • BACKGROUND/OBJECTIVES: This study was designed to investigate the improvement effect of white ginseng extract (GS-KG9) on D-galactosamine (Ga1N)-induced oxidative stress and liver injury. SUBJECTS/METHODS: Sixty Sprague-Dawley rats were divided into 6 groups. Rats were orally administrated with GS-KG9 (300, 500, or 700 mg/kg) or silymarin (25 mg/kg) for 2 weeks. The rats of the GS-KG9- and silymarin-treated groups and a control group were then intraperitoneally injected Ga1N at a concentration of 650 mg/kg for 4 days. To investigate the protective effect of GS-KG9 against GalN-induced liver injury, blood liver function indicators, anti-oxidative stress indicators, and histopathological features were analyzed. RESULTS: Serum biochemical analysis indicated that GS-KG9 ameliorated the elevation of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH) in GalN-treated rats. The hepatoprotective effects of GS-KG9 involved enhancing components of the hepatic antioxidant defense system, including glutathione, glutathione peroxidase (GPx), superoxide dismutase (SOD), and catalase (CAT). In addition, GS-KG9 treatment inhibited reactive oxygen species (ROS) production induced by GalN treatment in hepatocytes and significantly increased the expression levels of nuclear factor erythroid-2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) proteins, which are antioxidant proteins. In particular, by histological analyses bases on hematoxylin and eosin, Masson's trichrome, α-smooth muscle actin, and transforming growth factor-β1 staining, we determined that the administration of 500 mg/kg GS-KG9 inhibited hepatic inflammation and fibrosis due to the excessive accumulation of collagen. CONCLUSIONS: These findings demonstrate that GS-KG9 improves GalN-induced liver inflammation, necrosis, and fibrosis by attenuating oxidative stress. Therefore, GS-KG9 may be considered a useful candidate in the development of a natural preventive agent against liver injury.

개에서 요도를 포매한 평활근육종의 수술적 처치 및 예후 (Prognosis and Surgical Treatment of the Urethra Embedding Leiomyosarcoma in a Dog)

  • 김지현;이준암;김일화;장동우;강현구
    • 한국임상수의학회지
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    • 제31권4호
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    • pp.307-312
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    • 2014
  • 충북대학교 동물의료센터에 16년령 암컷 시츄견이 복부팽만과 배뇨, 배변곤란을 주증으로 내원하였다. 신체검사 시 복부에서 10 cm 가량의 종양이 촉진되었으며 방사선 상에서 확인되었고, 방광은 종양에 의해 배꼽 쪽으로 변위되어 있었다. 초음파 상에서 종양은 불균질한 실질과 국소적으로 무에코성 영역을 가지고 있었다. 혈액검사 소견상 혈소판증가증과 약한 호중구증가증이 나타났으며, 혈액화학치 검사 결과 ALP 상승을 확인할 수 있었다. 개복술을 시행하여 자궁경과 방광 사이의 $10.5{\times}9.6cm$ 크기의 단단한 종양이 요도를 포매하고 있는 것을 확인하고 주위조직과 둔성분리 후 절제하였다. 조직병리학적 검사와 면역화학 적 검사 결과 종양은 평활근육종으로 진단되었다. 수술 후 일주일 뒤 배뇨곤란을 주증으로 재 내원하였다. 배뇨곤란의 원인을 찾기 위하여 요도조영술을 실시하였으나 물리적인 폐색 등 특별한 원인을 찾을 수 없었다. 방광근과 방광조임근에 작용하는 몇몇 약물요법 등을 시행하였지만 반응이 없어 중장기의 보존요법이 지시되었으며 배뇨곤란 증상은 술 후 27일차에 갑작스럽게 호전되어 환자는 원활한 배뇨를 하게 되었다. 본 증례는 요도를 포매하고 있는 복강 내 종양의 수술 후 예후와 배뇨곤란과 같은 후유증을 나타낼 수 있음을 시사하고 있다.

Influence of Dietary Supplementation of Condensed Tannins through Leaf Meal Mixture on Intake, Nutrient Utilization and Performance of Haemonchus contortus Infected Sheep

  • Pathak, A.K.;Dutta, Narayan;Banerjee, P.S.;Pattanaik, A.K.;Sharma, K.
    • Asian-Australasian Journal of Animal Sciences
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    • 제26권10호
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    • pp.1446-1458
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    • 2013
  • The study assessed the effect of dietary supplementation of leaf meal mixture (LMM) containing condensed tannins (CT) on feed intake, nutrient utilization and performance of sheep infected with Haemonchus contortus. Eighteen adult sheep of similar age and body weight ($25.03{\pm}1.52$) were included in this study and out of these, 12 sheep were infected with single dose of infective third stage larvae of H. contortus at 2,000 larvae per sheep. The experimental sheep were allocated in three different groups' i.e. negative control (NC; no infection), control (C; H. contortus infected) and treatment (T; H. contortus infected+CT at 1.5% of the DM through LMM) and the experiment was conducted for a period of 90 d. The intake of dry matter (DM), organic matter (OM) and digestibility of DM, OM, neutral detergent fibre (NDF) and acid detergent fibre (ADF) were comparable among three animal groups. However, digestibility of crude protein (CP) and ether extract (EE) were significantly (p<0.05) higher in NC group as compared to both C and T groups. Nitrogen (N) retention (g/d or % of N intake) was significantly (p = 0.038) lower in C group as compared to T and NC groups. Daily intake (g/kg $W^{0.75}$) of digestible crude protein (DCP), digestible organic matter (DOM) and total digestible nutrient (TDN) did not differ significantly (p<0.05) in the three groups. Haemoglobin (Hb) and packed cell volume (PCV) were significantly (p<0.001) higher in treatment group as compared to control. The level of Hb and PCV reduced (p<0.001) after 30 days of experimental feeding. CT significantly (p<0.001) reduced serum urea in T group as compared to NC and C groups. Serum proteins differed significantly (p<0.01) among the three groups. The activity of serum enzymes AST, ALT, ALP and LDH were also statistically non significant (p<0.05) among treatments. The weight of abomasal lymph nodes (ALN) in T group was higher (p<0.05) than in C group. Treatment group had lower (p<0.05) total worms and fecal egg count compared to control group. It may be concluded that dietary supplementation of CT through LMM significantly improved the N retention, and inhibited the different developmental stages of Haemonchus contortus in experimental sheep.