• Parasites, Hosts and Diseases
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• 제22권2호
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• pp.203-208
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• 1984

만손주혈흠충 충란의 soluble eff antigen (SEA)을 mini-pump를 이용하여 마우스, 복강내에 지속적으로 주입시키면서 말초혈액내의 호산구수 변동, delayed hypersensitivity인 ear swelling test, 간조직병변, 효소 표식면역법을 이용한 혈청내 항체가를 경시적으로 관찰한 결과 다음 성적을 얻었다. 1. 말초혈액 호산구수는 SEA투여후 2~3주후에 최고에 달하였고 그후 서서히 감소하였다. 2. Ear swelling test 실시에서 SEA투여 2주후에 종창이 최고에 달하고 그후 서서히 감소하였다. 3. 간조직병변은 SEA투여후 4주에 육아종형성을 관찰하였고 그후 조직손상이 복귀하였다. 4. 현청에서의 항체가는 SEA투여후 4주후에 양성대조군보다 높았으며 시간이 경과함에 따라 항채가가 증가하였다.

• Parasites, Hosts and Diseases
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• 제50권1호
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• pp.29-35
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• 2012

The aim of the study is to characterize the phenotypes of $CD4^+$ $CD25^+$ T regulatory cells within the liver granulomas and association with both Foxp-3 gene expression and splenic cytokines. Naive C57BL/6 mice were intravenously injected with multiple doses of the soluble egg antigen (SEA) 7 days before cercarial infection. The immunized and infected control groups were sacrificed 8 and 16 weeks post-infection (PI). Histopathology, parasitological parameters, splenic phenotypes for T regulatory cells, the FOXP-3 expression in hepatic granuloma using real-time PCR, and the associated splenic cytokines were studied. Histopathological examination of the liver revealed remarkable increase in degenerated ova within hepatic granuloma which decreased in diameter at weeks 8 and 16 PI ($P$<0.01). The percentage of T regulatory cells ($CD4^+$ $CD25^+$) increased significantly ($P$<0.01) in the immunized group compared to the infected control at weeks 8 and 16 PI. The FOXP-3 expression in hepatic granulomas increased from 10 at week 8 to 30 fold at week 16 PI in the infected control group. However, its expression in the immunized group showed an increase from 30 at week 8 to 70 fold at week 16 PI. The splenic cytokine levels of pro-inflammatory cytokines, IFN-${\gamma}$, IL-4, and TNF-${\alpha}$, showed significant decreases ($P$<0.05) compared to the infected control group. In conclusion, the magnitude and phenotype of the egg-induced effects on T helper responses were found to be controlled by a parallel response within the T regulatory population which provides protection in worm parasite-induced immunopathology.

• Parasites, Hosts and Diseases
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• 제61권3호
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• pp.251-262
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• 2023

Schistosomiasis causes significant morbidity and mortality worldwide. This study aimed to assess the effect of schistosomula lung antigen preparation (SLAP) and soluble egg antigen (SEA) on a murine schistosomiasis mansoni model. Ninety laboratory-bred male Swiss albino mice were divided into 6 groups. Two doses of the vaccine were given at 2-week intervals. All mice were subcutaneously infected with 80±10 Schistosoma mansoni cercariae 2 weeks after the last vaccination dose. They were sacrificed 7 weeks post-infection. Parasitological and histopathological studies were conducted to assess the effect of inoculated antigens (single or combined). The results showed that the combination of SLAP and SEA (combination group) led to a significant reduction in worm burden (65.56%), and liver and intestine egg count (59% and 60.59%, respectively). The oogram pattern revealed a reduction in immature and mature eggs (15±0.4 and 10±0.8, respectively) and an increased number of dead eggs in the combination group (P<0.001). In terms of histopathological changes, the combination group showed notably small compact fibrocellular egg granuloma and moderate fibrosis in the liver. A high percentage of destroyed ova was observed in the intestine of the combination group. This study demonstrates for the first time the prophylactic effect of combined SLAP and SEA vaccine. The vaccine induced a significant reduction in the parasitological and pathological impacts of schistosomiasis mansoni in hepatic and intestinal tissues, making it a promising vaccine candidate for controlling schistosomiasis.

• Journal of Animal Science and Technology
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• 제44권5호
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• pp.633-642
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• 2002

1. ETEC F41 균주로부터 분리한 섬모항원의 분자량은 29.5 kDa으로 나타났으며, western blot을 통하여 섬모항원임을 확인하였다. 2. 분리한 섬모항원의 농도를 50 ${\mu}g$/$m\ell$, 200 ${\mu}g$/$m\ell$, 600 ${\mu}g$/$m\ell$로 조정 후 산란계에 접종하였다. 이 후 ELISA법을 이용하여 난황의 항체역가를 측정한 결과 최고치가 320,000(antigen 50${\mu}g$/$m\ell$), 450,000(antigen 200${\mu}g$/$m\ell$), 320,000(anti- gen 600${\mu}g$/$m\ell$)으로 나타났다. 3. F41난황항체와 K88, K99, 987P 섬모항원과의 교차반응을 ELISA법을 이용하여 조사해본 결과 난황항체를 30,000배 희석 시 교차반응이 없었다. 4. 실험실조건하에서 난황항체의 항원결합능력을 조사한 결과, 동결건조한 WSF을 2${\sim}$4 mg/$m\ell$ 첨가 시 균체의 농도가 $10^9$ CFU/$m\ell$에서 $10^5$ CFU/$m\ell$로 급격하게 감소하였다.

• Parasites, Hosts and Diseases
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• 제24권1호
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• pp.49-54
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• 1986

폐흡충 충란항원의 항원성을 평가하기 위하여 감염 후 10개월된 충체에서 유리된 충란의 수용성 항원을 제작하였다. 실험감염 개 페흠충증에서 특이 IgG, IgM 항체의 생성을 효소면역측정법으로 충체항원과 비교 관찰하였다. 또한 disc-PAGE로 충란항원의 구성 단백질을 관찰하였다. 1. 폐흡충 충란항원에 대한 특이 IgG 항체는 충체가 충란을 형성하는 감염 8주에 상승하기 시작하여 12주에 최대치에 이르고 이후 일정한 항체가를 유지한 반면, 특이 IgM 항체의 생성은 대단히 미약하였다. 2. 폐흡충 충체항원에 대한 특이 IgG 항체는 감염 2주에 상승하여 관찰기간인 13주까지 계속 상승하였다. 항체가도 충란항원보다 높았다. 충체항원에 대한 특이 IgM 항체는 감염 2주부터 나타나 8주까지는 일정량을 유지하나 이후 감소하기 시작하여 12주에는 감염전 상황으로 되돌아왔다. 3. 폐흡충 충란항원은 전기영동상에서 단백질 band 2개로 관찰되었으며 성충의 충체항원에서 관찰되는 10개의 단백질 band중 Band 1과 Band 2에 해당되는 단백질 band임을 확인할 수 있었다. 따라서 2개의 단백질로 구성된 폐흡충의 수용성 충란항원은 특이 IgG 및 특히 IgM 항체 생산을 유도하나 성충충체항원에 비하여 그 항원성이 대단히 미약하다고 판단하였다.

• Archives of Pharmacal Research
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• 제28권9호
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• pp.1002-1012
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• 2005

5-Substituted 4-oxo-2-thioxo-1,,2,3,4-tetrahydropyrimidine were synthesized by interaction of 4­oxo-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-sulfonylhydrazide with some aldehydes to give the corresponding Schiff-bases, which after cyclization gave corresponding thiazolidinones. For some of the thiazolidinones, Mannich bases reaction was carried out. All the derivatives were tested for their possible inhibitory effect on Schistosoma mansoni cercarial elastase (CE). Only, N'-(4-methylbenzyledine)-4-oxo-2-thioxo-1,2 ,3,4-tetrahydropyrimidine-5-sulfonylhydrazide was found to have potent inhibitory effect on the CE activity with $IC_{50} = 264{\mu}M.$ Upon its use as a paint for mice tails before infection with S. mansoni cercariae, the compound formulated in jojoba oil caused a significant reduction ($93\%$; P-value = 0.0002) in the worm burden. IgG & IgM in mice sera were measured by using several S. mansoni antigens by ELISA. Sera from treated infected mice (TIM) 2, 4, and 6 weeks (W) post infection (PI) showed 1.2 folds lower, 1.2 folds higher, 1.7 folds lower IgM reactivity against soluble cercarial antigenic preparation (CAP), respectively, when compared with sera collected from infected untreated mice (IUM). Sera from TIM 2, 4, and 6WPI showed 1.3, 1.6, and 1.7 folds higher IgG reactivity, respectively against CAP than the IgG reactivity from IUM. Sera from TIM 2, 4 and 6WPI showed 1.5, 1.2 folds lower and 1.4 folds higher IgM reactivity, respectively against soluble worm antigenic preparation (SWAP) when compared with sera collected from IUM. Sera from TIM 2, 4, and 6WPI showed 1.4, 1 folds lower and 1 fold higher IgG reactivity, respectivley to SWAP when compared with sera from IUM. Sera from TIM 2, 4, and 6WPI had generaly lower IgM and IgG reactivities against soluble egg antigen (SEA) when compared with sera from IUM.