• 제목/요약/키워드: Flagella

검색결과 113건 처리시간 0.03초

산란계에 Illite 급여가 Salmonella typhimurium 편모항원에 대한 체액성 면역 반응에 미치는 영향 (Effects of Dietary Supplementation of Illite on Humoral Immunity against Salmonella typhimurium Flagella Antigen in Laying Hens)

  • 이상래;이성;장규태;김정우
    • 한국가금학회지
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    • 제36권3호
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    • pp.201-206
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    • 2009
  • 본 연구는 Hyline Brown 산란계에 illite 첨가 급여가 Salmonella typhimurium 편모항원에 대한 면역 반응에 미치는 영향을 조사하였다. 외관상 건강하고 정상적으로 산란을 하는 개체만을 1차 선별하였고 2차적으로 S. typhimurium 편모항원에 대한 혈청 항체가를 측정하여 항체 형성이 되지 않은 28수를 시험 동물로 공시하였다. 시험구의 배치는 완전 임의로 illite 투여구 14수 및 대조구 14수로 설정하였으며, 다시 투여구 및 대조구는 각각 7수씩 2개 군을 나누어 면역 증강제를 달리하여 Salmonella 편모항원을 면역을 실시하였다. 실험 시작후 8주동안의 산란율을 조사한 결과, illite를 첨가 급여한 투여구와 대조구 사이에 통계학적으로 유의적인 차이는 없었다. Salmonella 편모항원에 대한 혈청 항체가를 측정한 결과, Freund's adjuvant 및 croton oil을 면역 증강제로 이용한 모든 투여구에서 illite를 급여하지 않은 대조구에 비해 항체가가 높은 경향을 알 수 있었다. Freund's adjuvant를 이용한 시험구에서는, illite 투여구의 항체가가 시험 6주부터 9주까지 대조구에 비하여 현저히 높은 것으로 조사되었으며(p<0.05), croton oil을 이용한 시험구에서도 illite 투여구의 혈중 항체가가 시험 4, 6, 7주에 대조구에 비해 현저히 높은 것으로 조사되었다(p<0.05). 이러한 조사 결과는 산란계에서 illite 첨가 급여함으로써 체액성 면역 반응을 증가시켜 Salmonellosis와 같은 세균 감염에 대한 방어력이 증대에 도움이 될 수 있을 것이라 사료된다.

Three Newly Recorded Marine Heterotrophic Flagellates (Protist), Neometanema parovale, Stephanopogon pattersoni and Thaumatomastix sp. from South Korea

  • Lee, Won Je
    • 환경생물
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    • 제33권2호
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    • pp.148-152
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    • 2015
  • Three marine heterotrophic flagellates from intertidal sediments of Gwang-Am beach and Garorim Bay, Korea were identified as Neometanema parovale Lee and Patterson 2014, Stephanopogon pattersoni Lee et al. 2014 and Thaumatomastix sp. These species are reported taxonomically for the first time from Korea, and are described with illustrations and micrographs. Diagnostics of these species are as follows. Neometanema parovale (Euglenozoa): size in vivo, $10{\sim}23{\mu}m\;long$ with 22 pellicular strips, ingestion apparatus barely visible by light microscopy and two flagella pointed in different directions when moving. Stephanopogon pattersoni (Percolozoa): size in vivo, $20{\sim}33{\mu}m\;long$, with 6 ventral and 1 ventro-lateral ciliary rows, and three barbs. Thaumatomastix sp. (Cercozoa): size in vivo, $14{\sim}17{\mu}m$ with body scales and spines, and two flagella with one naked and one scaled.

해양 미소 편모조류의 종 동정을 위한 인편 형태에 관한 연구 (Scale Morphologies for Identification of Marine Nanoflagellates)

  • 김형신;정민민
    • ALGAE
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    • 제20권4호
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    • pp.305-314
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    • 2005
  • 5 Haptophyta 2 Chrysophyta and 1 Prasinophyta species of scale-bearing nanoflagellates were collected in coastal water of Korea and identified by examination of their scales with Field Emission Scanning Electron Microscope (JSM-6700F). These included Chrysochromulina ahrengoti, C. simplex, C. spinifera, Prymnesium parvum, P. patelliferum, Mamiella gilva, Paraphysomonas imperforata and Pa. vestita. The surface of cells covered with unmineralised scales (5 Haptophyte and 1 Prasinophyta species) or silica scales (2 Chrysophyta species). Scale-covered flagella are found in the 1 Prasinophyta species. One of the main structural characteristics of Haptophyte is the haptonema, a filiform organelle which occurs together with the two flagella. It may be long and coiling upon irritation as in Chrysochromulina, or short and noncoiling as in Prymnesium.

Bacillus thuringiensis 항원들의 면역학적 분석 (Immunological Characterization of Bacillus thuringiensis Antigens)

  • 정재득;박정선;조영수;홍순복;이형환;조명환
    • 한국미생물·생명공학회지
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    • 제23권1호
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    • pp.110-117
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    • 1995
  • This study was carried out to immunologically characterize Bacillus thuringiensis (B.t) antigens. Protein patterns of ultrasonicated- antigens of B. thuringiensis subspecies using SDS- PAGE revealed marked similarities among all the strains analyzed except for the difference between quantative variations of bands and some protein antigens. The comparison of the protein patterns showed that the protein antigen of 45 kilodalton (kd) was common in 11 strains and that the difference between B. thuringiensis subsp. canadensis and galleriae was noticed in quantative variations of bands despite of ambiguous serogrouping, suggesting a useful method for identification. All strains examined showed similar antigenic patterns in SDS-PAGE, while immunodominant bands differed in antigenic reactivity in western blot using polyclonal antibodies. Polyclonal antibody to B. thuringiensis subsp. thuringiensis and israelensis in indirect immunofluorescence assay reacted with flagella and cell surface antigens. The present study indicates that SDS-PAGE and western blot analysis may be used as tools for differentiation and identification of B. thuringiensis subspecies.

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Three newly recorded heterotrophic euglenids(Protist), Entosiphon oblongum, Euglena longa and Keelungia pulex from South Korea

  • Lee, Won Je
    • Journal of Species Research
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    • 제11권2호
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    • pp.89-93
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    • 2022
  • Three heterotrophic euglenids from marine water column (Seodo port, Yeosu) and freshwater sediment (Seodong-chun, Incheon), Korea were identified as Entosiphon oblongum Cavalier-Smith and Vickerman, 2016; Euglena longa (Pringsheim, 1936) Marin and Melkonian, 2003; and Keelungia pulex Chan and Moestrup, 2013 based on morphological characters and 18S rDNA sequence analysis. These species are reported taxonomically for the first time from Korea and are described with micrographs. Diagnoses of these species are as follows. Entosiphon oblongum: phagotrophic, gliding, size in vivo, 23.1-29.3 ㎛ (Avg. 26.5 ㎛, n=30) long, ovate with a protrusive feeding siphon (apparatus), several deep grooves and two heterodynamic flagella. Euglena longa: osmotrophic, swimming, size in vivo, 32.3-52.2 ㎛ (Avg. 42.2 ㎛, n=26) long, elongated with many paramylum granules and two flagellar. Keelungia pulex: phagotrophic, gliding, size in vivo, 13.5-19.7 ㎛(Avg. 16.4 ㎛, n=97) long, oblong to ovoid with a hook-shaped ingestion apparatus, several dorsal ridges and two flagella.

Vibrio harveyi의 미생물학적 특성 (Microbiological characteristics of Vibrio harveyi)

  • 원경미;최정현;김이청;박수일
    • 한국어병학회지
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    • 제20권3호
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    • pp.237-247
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    • 2007
  • 본 연구에서는 우리 나라에서 분리된 Vibrio harveyi의 미생물학적 특성을 조사하여 V. harveyi 연구의 기초적인 정보를 제공하고자 하였다. V. harveyi는 염분 농도 3%, 배양 온도 30℃에서 가장 잘 증식하였다. Swarming 운동은 1.5% NaCl 첨가 TSA에서 가장 활발하였으며, swarming 운동시 균체는 길어지며, 짧고 곧은 다수의 lateral flagella가 생성된 것을 확인하였다. 우리나라에서 분리된 V. harveyi는 luminometer로 직접 검출하는 방법과 luciferase gene을 검출하는 방법 모두에서 음성으로 나타나, 발광능이 없는 것으로 조사되었다. V. harveyi의 균체 단백질은 50 kDa 부근의 major protein을 가지며, 균주에 따라 40 kDa 근처의 상이한 band pattern을 보였다.

Contribution of the murI Gene Encoding Glutamate Racemase in the Motility and Virulence of Ralstonia solanacearum

  • Choi, Kihyuck;Son, Geun Ju;Ahmad, Shabir;Lee, Seung Yeup;Lee, Hyoung Ju;Lee, Seon-Woo
    • The Plant Pathology Journal
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    • 제36권4호
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    • pp.355-363
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    • 2020
  • Bacterial traits for virulence of Ralstonia solanacearum causing lethal wilt in plants were extensively studied but are not yet fully understood. Other than the known virulence factors of Ralstonia solanacearum, this study aimed to identify the novel gene(s) contributing to bacterial virulence of R. solanacearum. Among the transposon-inserted mutants that were previously generated, we selected mutant SL341F12 strain produced exopolysaccharide equivalent to wild type strain but showed reduced virulence compared to wild type. In this mutant, a transposon was found to disrupt the murI gene encoding glutamate racemase which converts L-glutamate to D-glutamate. SL341F12 lost its motility, and its virulence in the tomato plant was markedly diminished compared to that of the wild type. The altered phenotypes of SL341F12 were restored by introducing a full-length murI gene. The expression of genes required for flagella assembly was significantly reduced in SL341F12 compared to that of the wild type or complemented strain, indicating that the loss of bacterial motility in the mutant was due to reduced flagella assembly. A dramatic reduction of the mutant population compared to its wild type was apparent in planta (i.e., root) than its wild type but not in soil and rhizosphere. This may contribute to the impaired virulence in the mutant strain. Accordingly, we concluded that murI in R. solanacearum may be involved in controlling flagella assembly and consequently, the mutation affects bacterial motility and virulence.

Bradykinin Receptor의 발현에 미치는 녹농균유래 Nucleoside Diphosphate Kinase 및 Flagellin의 효과 (Upregulaton of Bradykinin Receptor Mediated by Nucleoside Diphosphate Kinase and Flagellin from Pseudomonas aeruginosa)

  • 김용재;신희성;;하운환
    • 미생물학회지
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    • 제50권4호
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    • pp.281-284
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    • 2014
  • 병원성 균주인 녹농균(Pseudomonas aeruginosa) 감염에 대응하여 나타나는 면역반응은 인체의 항상성 유지에 중요하다. 선행 연구에서 녹농균의 감염에 대응하여 bradykinin receptor (BR)의 발현이 증가됨을 보고하였지만, 발현유도에 관여하는 녹농균 유래인자에 대해서는 보고한 바가 없었다. 이번 연구에서는 녹농균에 의한 BR의 발현은 Type III secretion system (T3SS)이 관여하지만, 기존에 알려진 T3SS인자가 아닌 nucleoside diphosphate kinase (Ndk)에 의한 것으로 조사되었다. 하지만 pDNNDK를 이용한 transfection 실험 결과, Ndk 만으로는 BR의 발현이 유도되지 않았으며, Ndk와 함께 flagella가 필요함을 발견하였다. 이러한 결과는 기존에 보고된 주요 pathogen-associated molecular patterns (PAMPs)인 flagella와 더불어 감염대응에 관여하는 Ndk를 발굴한 의미가 있으며, 녹농균에 의한 질병기전을 이해하는데 도움을 줄 수 있다.