• 제목/요약/키워드: immunized larvae

검색결과 17건 처리시간 0.021초

Partial cross-resistance between Strongyloides venezuelensis and Nippostrongylus brasiliensis in rats

  • Baek, Byeong-Kirl;Islam, M.-Khyrul;Kim, Jin-Ho;Lee, John-Wha;Hur, Jin
    • Parasites, Hosts and Diseases
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    • 제37권2호
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    • pp.101-107
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    • 1999
  • Rats were immunized through an initial infection with 1,000 filariform larvae (L3) of Nippostrongylus brasiliensis and after complete expulsion of worms they were challenged with 1,000 L3 of Strongyloides venezuelensis to investigate whether cross-resistance developed against a heterologous parasite. Nippostrongylus brasiliensis immunized rats developed a partial cross-resistance against S.venezuelensis migrating larvae (MSL3) in the lungs and adult worms in the small intestine. The population of MSL3 in the lungs were significantly lower (p<0.05) in immunized rats($22.0{\;}{\pm}{\;}7.4$) compared with controls ($105.0{\;}{\pm}{\;}27.6$). The populations of adult worms, egg output and fecundity were initially decreased but from day 14 post-challenge they did not show any significant difference between immunized and control rats. However, the length of worm in immunized rat was revealed as retardation. Peripheral blood eosinophilia was significantly decreased (P<0.05) on day 7 post-challenge and then gradually increased which peaked on da 42 post-challenge when most of the worms were expelled. these results suggest that peripheral blood eosinophilia is strongly involved in the worm establishment and expulsion mechanisms.

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Identification of a novel immune-related gene in the immunized black soldier fly, Hermetia illucens (L.)

  • Jung, Seong-Tae;Goo, Tae-Won;Kim, Seong Ryul;Choi, Gwang-Ho;Kim, Sung-Wan;Nga, Pham Thi;Park, Seung-Won
    • International Journal of Industrial Entomology and Biomaterials
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    • 제36권2호
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    • pp.25-30
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    • 2018
  • The larvae of Hermetia. illucens have a high probability of coming into contact with microorganisms such as bacteria and fungi. Therefore, the survival of H. illucens is primarily the protection of their own against microbial infection. This effect depends on the development of the innate immune system. Antimicrobial Peptides (AMPs) exhibit antimicrobial activity against other bacterial strains and can provide important data to understand the basis of the innate immunity of H. illucens. In this study, we injected larvae with Enterococcus. faecalis (gram-positive bacteria) and Serratia. marcescens as (gram-negative bacteria) to test the hypothesis that H. illucens is protected from infection by its immune-related gene expression repertoire. To identify the inducible immune-related genes, we performed and cataloged the transcriptomes by RNA-Seq analysis. We compared the transcriptomes of whole larvae and obtained a DNA fragment of 465 bp including the poly (A) tail by RACE as a novel H. illucens immune-related gene against bacteria. A novel target mRNA expression was higher in immunized larvae with E. faecalis and S. marcescens groups than non-immunized group. We expect our study to provide evidence that the global RNA-Seq approach allowed for the identification of a gene of interest which was further analyzed by quantitative RT-PCR, together with genes chosen from the available literature.

집파리유충 hemolymph 중신형의 anti-fungal peptides의 분리정제 (Isolation and Purification of Novel Anti-Fungal Peptides from Hemolymph of Immunized Larvae of Housefly, Musca domestica)

  • ;;;성창근
    • 생명과학회지
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    • 제16권3호
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    • pp.387-395
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    • 2006
  • 유도된 집파리유통 hemolymph중에서 Candida albicans의 3가지 anti-fungal peptides를 분리하였다. 3개 anti-fungal peptides는 분자량이 4-16 kDa 사이의 분명한 구별이 있을 뿐만 아니라, 각 peptide는 anti-fungal peptides작용이 있었다. 이들 peptide의 공통 특징은 모두 열을 받은 뒤 활성이 변하지 않는 비교적 강한 내열성을 보여주었다.

Proteomic Analysis of Immunized Bombyx mori Larvae

  • Song, Kyung-Han;Jung, Su-Jin;Seo, Young-R.;Kang, Seok-Woo;Han, Sung-Sik
    • 한국잠사학회:학술대회논문집
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    • 한국잠사학회 2004년도 International Conference of Sericultural and Entomological Sciences
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    • pp.70-70
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    • 2004
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Modulation of Antibody Responses against Gnathostoma spinigerum in Mice Immunized with Crude Antigen Formulated in CpG Oligonucleotide and Montanide ISA720

  • Intapan, Pewpan M.;Hirunpetcharat, Chakrit;Kularbkaew, Churairat;Yutanawiboonchai, Wiboonchai;Janwan, Penchom;Maleewong, Wanchai
    • Parasites, Hosts and Diseases
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    • 제51권6호
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    • pp.637-644
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    • 2013
  • This study aimed to investigate the antibody responses in mice immunized with Gnathostoma spinigerum crude antigen (GsAg) incorporated with the combined adjuvant, a synthetic oligonucleotide containing unmethylated CpG motif (CpG ODN 1826) and a stable water in oil emulsion (Montanide ISA720). Mice immunized with GsAg and combined adjuvant produced all antibody classes and subclasses to GsAg except IgA. IgG2a/2b/3 but not IgG1 subclasses were enhanced by immunization with CpG ODN 1826 when compared with the control groups immunized with non-CpG ODN and Montanide ISA or only with Montanide ISA, suggesting a biased induction of a Th1-type response by CpG ODN. After challenge infection with live G. spinigerum larvae, the levels of IgG2a/2b/3 antibody subclasses decreased immediately and continuously, while the IgG1 subclass remained at high levels. This also corresponded to a continuous decrease of the IgG2a/IgG1 ratio after infection. Only IgM and IgG1 antibodies, but not IgG2a/2b/3, were significantly produced in adjuvant control groups after infection. These findings suggest that G. spinigerum infection potently induces a Th2-type biased response.

세균에 의해 면역이 유도된 동애등에의 항균활성 (The Antimicrobial Activity of Bacterial-challenged Black Soldier Fly, Hermetia illucens)

  • 박관호;윤은영;박승원;구태원
    • 생명과학회지
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    • 제26권12호
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    • pp.1409-1414
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    • 2016
  • 동애등에(Hermetia illucens)를 포함한 곤충은 불량환경에서 오랜 진화의 역사를 통해 병원균 침입에 대응하기 위하여 강력한 항균 펩타이드를 발현하는 선천성 면역기전을 보유하고 있다. 동애등에 생체 내 항균펩타이드를 인위적으로 유도하기 위하여, E. faecalis 포함한 5종의 세균을 한방침에 묻혀 주사하였다. 5종 세균에 의해 면역이 유도된 동애등에로부터 혈림프를 채취하여 각 세균에 따른 항균펩타이드 유도효과에 의한 항균활성을 그람양성균인 S. aureus와 그람음성균인 E. coli에 대해 비교 분석하였다. 그 결과, 고초균인 B. subtilis은 5종 세균 중 그람양성 및 음성균 둘 다에 대해서 가장 높은 항균활성을 나타내었다. B. subtilis ($1{\times}10^9cfu/ml$)에 의해 면역이 유도된 동애등에는 주사 후 24시간째 가장 강한 항균활성을 나타내었다. 또한 B. subtilis에 의해 면역이 유도된 동애등에는 가금류의 주요 병원균인 S. enteritidis, S. typhimurium 및 S. pullorum에 대해서도 높은 항균활성을 나타내었다. 이상의 결과로써, B. subtilis에 의해 면역이 유도된 동애등에는 가축 성장촉진용 항생제를 대체할 수 있는 사료첨가제로써 매우 유용할 것으로 판단된다.

Efficacy of recombinant enolase as a candidate vaccine against Haemaphysalis longicornis tick infestation in mice

  • Md. Samiul Haque;Mohammad Saiful Islam;Myung-Jo You
    • Parasites, Hosts and Diseases
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    • 제61권4호
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    • pp.439-448
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    • 2023
  • Tick infestation causes a significant threat to human and animal health, requiring effective immunological control methods. This study aimed to investigate the potential of recombinant Haemaphysalis longicornis enolase protein for tick vaccine development. The exact mechanism of the recently identified enolase protein from the H. longicornis Jeju strain remains poorly understood. Enolase plays a crucial role in glycolysis, the metabolic process that converts glucose into energy, and is essential for the motility, adhesion, invasion, growth, and differentiation of ticks. In this study, mice were immunized with recombinant enolase, and polyclonal antibodies were generated. Western blot analysis confirmed the specific recognition of enolase by the antiserum. The effects of immunization on tick feeding and attachment were assessed. Adult ticks attached to the recombinant enolase-immunized mice demonstrated longer attachment time, increased bloodsucking abilities, and lower engorgement weight than the controls. The nymphs and larvae had a reduced attachment rate and low engorgement rate compared to the controls. Mice immunized with recombinant enolase expressed in Escherichia coli displayed 90% efficacy in preventing tick infestation. The glycolytic nature of enolase and its involvement in crucial physiological processes makes it an attractive target for disrupting tick survival and disease transmission. Polyclonal antibodies recognize enolase and significantly reduce attachment rates, tick feeding, and engorgement. Our findings indicate that recombinant enolase may be a valuable vaccine candidate for H. longicornis infection in experimental murine model.

선모충(Trichinella spiralis) 유충의 조직 내 배설, 분리 및 감염항원 단백의 분포 (The Localization of the Excretory, Purified and Infected Antigenic Protein in the Tissue of Trichinella spiralis Larval Worm)

  • 김수진;주경환;정명숙;노영복
    • Applied Microscopy
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    • 제37권1호
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    • pp.43-52
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    • 2007
  • 선모충(Trichinella spiralis) 유충의 조직세포에 존재하는 분비배설, 감염 및 45 kDa 단백 항원의 분포를 확인하기 위하여 면역항체와 황금표지 단백A 복합체를 이용한 면역전자현미경 방법을 사용하였다. 분비배설항원은 선모충에 감염된 실험쥐의 근육으로부터 분리된 선모충을 인공배양 용액에 1일, 3일 동안 배양한 배양액을 수집하여 배설항원으로 사용하였다. 45 kDa 단백 항원은 실험용 흰쥐 근육에서 분리된 선모충유충을 분쇄하여 45 kDa 단백 항원을 분리하였다. 수집된 분비배설항원과 45 kDa 단백 항원은 실험토끼에 주사한 다음 6주 후에 실험토끼의 혈청으로부터 면역항체를 수집하였다. 감염항체는 선모충유충을 실험용 흰쥐에 감염시키고 4주 후에 실험용 흰쥐에서 수집된 혈청으로부터 분리하였다. 실험용 흰쥐 근육에서 분리된 선모충 유충은 고정과 탈수과정을 거처 Lowicryl HM20에 포매하고 초박절편을 제작하여 면역항체와 황금표지 단백A 복합체 (입자크기 15nm)를 반응시켜 전자현미경으로 관찰하였다. 1일 분비배설항원에 대한 실험용토끼 면역항체를 선모충유충 조직항원에 반응시켰을 때 충체의 표피와 기저층 그리고 식도세포간질 (esophagus interstitial matrix, EIM) 및 stichocyte의 ${\alpha}_0,\;{\alpha}_1$ 과립에 황금입자가 표지되었다. 3일 분비배설항원에 대한 실험용토끼 면역항체를 선모충유충 조직항원에 반응시켰을 때 충체의 표피와 기저층 그리고 EIM 및 stichocyte의 ${\alpha}_0$ 과립에 황금입자가 표지 되었다. 감염항체를 선모충 유충 조직항원에 반응시켰을 때 충체의 표피와 EIM에 황금입자가 표지되었다. 그리고 분리된 45 kDa 단백 항원에 대한 실험용토끼 면역항체를 선모충유충 조직항원에 반응시켰을 때 충체의 표피와 기저층 그리고 EIM 및 stichocyte의 ${\alpha}_0\;{\alpha}_1$ 과립에 황금입자가 표지되었다. 따라서 1일 동안 배설되는 분비배설항원은 선모충 유충의 표피와 stichocyte의 ${\alpha}_0\;{\alpha}_1$ 과립에서 유도되는 반면에 3일 동안 배설되는 분비배설항원은 표피와 stichocyte의 ${\alpha}_0$ 과립에서 유도되고, 선모충유충 감염후 1주, 4주에 실험쥐에서 형성되는 감염항체는 선모충의 표피와 기저층 그리고 EIM에서 분비되는 항원에 의하여 생성된다. 이상의 결과로 선모충의 분비배설항원과 감염항원은 선모충 유충의 표피와 EIM및 stichocyte의 ${\alpha}_0\;{\alpha}_1$ 과립에서 유도되며 이들은 45 kDa 단백을 포함하고 있는 것으로 생각된다.