1. 유제의 준비 <ol><li> ovalbumin는 파상풍 toxoid, 수용액의 열쇠 림펫 hemocyanin ....)은 프로 인드의 도움이되는를 완료하는 데 추가 : 유제는 항원의 1:1 혼합물 (DTH는 다양한 항원을 유도 할 수있다. 그것은 도움이되는가 아닌 다른 방법으로 라운드에 항원을 추가하는 것이 매우 중요합니다! </li><li> 결정과 유제를 주입하면 폐기물이 많이있다, 그래서 항상 당신이 필요로했던 것보다 1.5 또는 2 회 이상 준비합니다. </li><li> 2 MG / ML 솔루션을 준비하는 호수에서 항원을 디졸브. 당신이 집계를 풀어 싶지 않아으로 필터링하지 않음! </li><li> 고속에서 관과 소용돌이에 프로 인드의 도움이되는 H37Ra (Difco, 카탈로그 # 231131)을 넣어 완성. vortexing 동안 드롭하여 항원 드롭을 추가합니다. 5 분 더 항원의 모든 추가, 소용돌이. 혼합물은 흰색으로 바뀝니다해야합니다. </li><li> 유리 주사기에 감광 유제를 넣고 (피셔 카탈로그 # 14-825 - 17L) 18G 다리를 사용하여 다른 유리 주사기에 연결합니다. 그것이 (5-10 분) 하드된다 때까지 다른 주사기에서 유제를 보내드립니다. 이 5 ML 주사기를 사용하는 것이 좋습니다. 유제 5 개 이상 ML이 필요한 경우 5 ML 주사기 여러 세트를 사용합니다. </li><li> 유제는 3 주 동안 4 ° C에서 주사기에 저장할 수 있습니다. </li></ol> 2. 쥐를 예방 접종 <ol><li> 몇 분 동안 주사기에 감광 유제를 혼용하여 주사에 사용되는 주사기로 전송할 수 있습니다. 23G 바늘과 Luer - 록 팁 3 ML의 주사기를 사용하여 꼬리의 기지에서 1-2 사이트에 subcutaneously 200 ML을 주사. </li></ol> 3. 뒤에 항원과 도전 <ol><li> 이레 예방 접종 후, 쥐의 백업 2 장소를 면도하고 다른 장소에서 한 자리하고 생리 (또는없는 항원)에 1 MG / ML 항원 솔루션의 intradermally 20 ML을 주입. 당신이 염증 반응을 강화 집계를 느슨한 수 있으므로, 항원 솔루션을 필터링하지 마십시오. </li><li> 쥐나는 움직임을 피하기 위해 anesthesized해야합니다. intradermally 27G ½ 바늘 1 ML의 주사기를 사용하여 솔루션을 주사. 주사 바늘 사이를 변경합니다. 참고 : 도전 대신 더 정확한 측정을 위해 다시의 귀를 날개로 이루어 질 수 있습니다. 에서 동영상을 참조 <a href="/index/Details.stp?ID=325">https://www.jove.com/index/Details.stp?ID=325</a> </li></ol> 4. DTH 측정 <ol><li> 주사 사이트는 빨개과 염증의 신호로 붓기 시작합니다. 통치자 또는 더 나은 아직, 캘리퍼스를 사용하여 염증이 지역의 직경을 측정합니다. 최대 붓기 24 72 시간 사이에 발생한다. </li></ol>

<ol>
	<li>Beeton, C., Chandy, K. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Induction+and+monitoring+of+adoptive+delayed-type+hypersensitivity+in+rats.">Induction and monitoring of adoptive delayed-type hypersensitivity in rats.</a> Journal of Visualized Experiments. 8, (2007).</li></ol>

저자 Airmid 주식 회사에 대한 공동 설립자 및 컨설턴트 아르

DTH 반응보다 정확한 측정을 위해 우리는 귀의 날개에있는 항원과 쥐 도전하는 것이 좋습니다. 반응은 다음 관련 항원 - 도전 귀가하거나, 생리 혼자 또는없는 항원과 도전 귀 사이에 붓기 귀에 차이로 측정할 수 있습니다. 귀에에 도전 데모는 1로 표시됩니다.

무균 솔루션 시약과 주사기를 사용하십시오. 유리 주사기와 18G 다리는 autoclaved 수 있습니다. 처음으로 시약을 취급하기 전에 재료 데이터 시트를 읽고 적절한 보호 장비를 착용하십시오.

induction and monitoring of active delayed type hypersensitivity (dth) in rats

지연 유형 과민성 (DTH)은 면역 시스템이 준비하는되어있는 대한 항원의 주사의 사이트를 침투 CCR7 - 효과기 기억 T의 lymphocytes로 인한 염증 반응이다. 염증 반응은 antigenic 도전의 사이트의 빨갛게과 팽창이 특징입니다. 그것은 면역 억제제의 생체내 효능에 결정하는 편리한 모델입니다. 피부 DTH는 항원에 특정한 T의 lymphocytes의 입양 전송 또는 항원, 그리고 주어진 피부 영역에서 염증 반응을 유발하는 항원과 이후의 intradermal 도전과 적극적인 예방 접종을 통해 유도된 수 있습니다. DTH 반응은 예를 들어 ovalbumin, 투베르쿨린,​​ 파상풍 toxoid, 또​​는 열쇠 림펫 hemocyanin (KLH)에 대한 다양한 항원을 유도하실 수 있습니다. 여기 루이스 쥐에서 활약 DTH 반응을 유도하는 방법을 보여줍니다. 우리가 먼저 프로 인드의 도움이되는을 완료에 KLH,이자 우리의 항원의 물 - 인 - 오일 에멀젼을 준비하고 쥐에 subcutaneously이 유제를 주입합니다. 이것은 KLH로 이동 메모리 T 세포를 개발하는 면역 체계를 주요 것입니다. 세븐 일 후 우리는 반대편에, 한쪽과 ovalbumin,없는 항원과 KLH와 함께 뒷면에 intradermally 쥐에 도전합니다. 염증 반응이 16~72시간 나중에 볼 수 있으며 빨간색과 부풀어 지역은 DTH 심각의 표시로 측정됩니다.

Watch this Scientific Journal Video about Induction and Monitoring of Active Delayed Type Hypersensitivity DTH in Rats at JoVE.com

Induction and Monitoring of Active Delayed Type Hypersensitivity DTH in Rats

지연 유형 과민성 (DTH)는 CCR7 - 효과기 기억 T의 lymphocytes로 인한 염증 반응이다. 여기 루이스 쥐에 적극적으로 DTH를 유발하고 염증 반응을 모니터링하는 방법을 보여줍니다.

쥐에서 Active 지연 유형 과민성 (DTH)의 유도 및 모니터링

Delayed type hypersensitivity (DTH) is an inflammatory reaction mediated by CCR7- effector memory T lymphocytes that infiltrate the site of injection of ...

induction-monitoring-active-delayed-type-hypersensitivity-dth

Research

JoVE Journal

Biology

Induction and Monitoring of Active Delayed Type Hypersensitivity (DTH) in Rats

17.6K 조회수.  University of California, Irvine (UCI). 지연 유형 과민성 (DTH)는 CCR7 - 효과기 기억 T의 lymphocytes로 인한 염증 반응이다. 여기 루이스 쥐에 적극적으로 DTH를 유발하고 염증 반응을 모니터링하는 방법을 보여줍니다.

비디오: Induction and Monitoring of Active Delayed Type Hypersensitivity DTH in Rats

Induction and Monitoring of Adoptive Delayed-Type Hypersensitivity in Rats

Delayed type hypersensitivity (DTH) is an inflammatory reaction mediated by CCR7- effector memory T lymphocytes that infiltrate the site of injection of an antigen against which the immune system has been primed. The inflammatory reaction is characterized by redness and swelling of the site of antigenic challenge. It is a convenient model to determine the in vivo efficacy of immunosuppressants. Cutaneous DTH can be induced either by adoptive transfer of antigen-specific T lymphocytes or by active immunization with an antigen, and subsequent intradermal challenge with the antigen to induce the inflammatory reaction in a given skin area. DTH responses can be induced to various antigens, for example ovalbumin, tuberculin, tetanus toxoid, or keyhole limpet hemocyanin. Such reactions can also be induced against autoantigen, for example to myelin basic protein (MBP) in rats with experimental autoimmune encephalomyelitis induced with MBP, an animal model for multiple sclerosis (1).
Here we demonstrate how to induce an adoptive DTH reaction in Lewis rats. We will first stimulate ovalbumin-specific T cells in vitro and inject these activated cells intraperitoneally to naive rats. After allowing the cells to equilibrate in vivo for 2 days, we will challenge the rats with ovalbumin in the pinna of one ear, while the other ear wil receive saline. The inflammatory reaction will be visible 3-72 hours later and ear thickness will be measured as an indication of DTH severity.

Delayed type hypersensitivity (DTH) is an inflammatory reaction mediated by CCR7- effector memory T (TEM) lymphocytes. Here we demonstrate how to activate antigen-specific TEM cells, induce adoptive DTH in Lewis rats and monitor the inflammatory response.

고양이의 입양 지연 유형 과민성의 유도 및 모니터링

연구

생물학

Imaging Effector Memory T cells in the Ear After Induction of Adoptive DTH

Delayed type hypersensitivity (DTH) is an immune reaction in which the main players are CCR7- effector / memory T lymphocytes. Here, we demonstrate a method for inducing and recording the progress of a DTH reaction in the rat ear. This is followed by a demonstration of the preparation of rat ear tissue for two-photon imaging of the CCR7- effector / memory T cell response.
An adoptive DTH is induced by the intraperitoneal injection of GFP-labeled Ova-specific CCR7- effector / memory T cell line (Beeton, C J. Visualized Experiments, Issue 8). Cells are then allowed to equilibrate in the rat for 48 hours before challenge by injecting one ear with saline (control ear) and the other with a 1:1 mix of Ova and Ova conjugated to Texas-Red (Ova-TR) to allow visualization of resident antigen-presenting cells.
We describe a method of tissue preparation useful for imaging the motility of cells within the deep dermal layer during an immune response, in conjunction with visualization of collagen fibers by second harmonic generation. Ear tissue is cut into 5 x 5 mm squares (slightly larger is better) and mounted onto plastic cover slips using Vetbond&trade;, which are then secured using silicone grease in an imaging chamber and superfused by oxygen-bubbled tissue culture medium at 37&deg;C.

Here we demonstrate a method for inducing and recording the progress of a delayed type-hypersensitivity (DTH) reaction in the rat ear. This is followed by a demonstration of the preparation of rat ear tissue for two-photon imaging of the effector / memory T cell response.

입양 DTH의 유도 후 귀에 영상 효과기 메모리 T 세포

Delayed type hypersensitivity (DTH) is an immune reaction in which the main players are CCR7- effector / memory T lymphocytes. Here, we demonstrate a ...

Assay for Neural Induction in the Chick Embryo

The chick embryo is a valuable tool in the study of early embryonic development. Its transparency, accessibility and ease of manipulation, make it an ideal tool for studying the formation and initial patterning of the nervous system. This video demonstrates how to graft organizer tissue into a host, a method by which Hensen s node (the organizer in the chick embryo) is grafted to a host competent ectoderm. The organizer graft instructs overlying na ve tissue to adopt a neural fate via neural inducing signals. This mechanism is referred to as neural induction, and constitutes the initial step in the formation of brain and spinal cord in amniotes. This method is essentially used for the characterization of putative neural inducing molecules in chick. This video demonstrates the different steps in the assay for neural induction; First, the donnor embryo is explanted and pinned on a dish. Then, the host embryo is prepared for New culture. The graft is excised and transplanted to the host area pellucida margin. The host is cultured for 18-22 hrs. The assembly is fixed and processed for further applications (e.g. in situ hybridization). This method was originally devised by Waddington 1,2 and Gallera 3,4.

Neural induction is the first step in the formation of the brain. It is a mechanism by which Hensen's node (organizer), instructs adjacent tissue to adopt a neural fate, i.e. to give rise to the nervous system. This video demonstrates an assay for neural induction in chick embryo.

칙의 배아에서 신경 유도에 대한 분석

The chick embryo is a valuable tool in the study of early embryonic development. Its transparency, accessibility and ease of manipulation, make it an ...

In vitro Reconstitution of the Active T. castaneum Telomerase

Efforts to isolate the catalytic subunit of telomerase, TERT, in sufficient quantities for structural studies, have been met with limited success for more than a decade. Here, we present methods for the isolation of the recombinant Tribolium castaneum TERT (TcTERT) and the reconstitution of the active T. castaneum telomerase ribonucleoprotein (RNP) complex in vitro.
Telomerase is a specialized reverse transcriptase1 that adds short DNA repeats, called telomeres, to the 3' end of linear chromosomes2 that serve to protect them from end-to-end fusion and degradation. Following DNA replication, a short segment is lost at the end of the chromosome3 and without telomerase, cells continue dividing until eventually reaching their Hayflick Limit4. Additionally, telomerase is dormant in most somatic cells5 in adults, but is active in cancer cells6 where it promotes cell immortality7.
The minimal telomerase enzyme consists of two core components: the protein subunit (TERT), which comprises the catalytic subunit of the enzyme and an integral RNA component (TER), which contains the template TERT uses to synthesize telomeres8,9. Prior to 2008, only structures for individual telomerase domains had been solved10,11. A major breakthrough in this field came from the determination of the crystal structure of the active12, catalytic subunit of T. castaneum telomerase, TcTERT1.
Here, we present methods for producing large quantities of the active, soluble TcTERT for structural and biochemical studies, and the reconstitution of the telomerase RNP complex in vitro for telomerase activity assays. An overview of the experimental methods used is shown in Figure 1.

In vitro Reconstitution of the Active T. castaneum Telomerase

Efforts to isolate the catalytic subunit of telomerase, TERT, in sufficient quantities for structural studies, have been met with limited success for more than a decade. Here, we present methods for the isolation of the recombinant Tribolium castaneum TERT (TcTERT) and the reconstitution of the active T. castaneum telomerase ribonucleoprotein (RNP) complex in vitro.

활성 T.의 체외의 Reconstitution에서 castaneum의 Telomerase

Efforts to isolate the catalytic subunit of telomerase, TERT, in sufficient quantities for structural studies, have been met with limited success for more ...

Induction and Testing of Hypoxia in Cell Culture

Hypoxia is defined as the reduction or lack of oxygen in organs, tissues, or cells. This decrease of oxygen tension can be due to a reduced supply in oxygen (causes include insufficient blood vessel network, defective blood vessel, and anemia) or to an increased consumption of oxygen relative to the supply (caused by a sudden higher cell proliferation rate). Hypoxia can be physiologic or pathologic such as in solid cancers 1-3, rheumatoid arthritis, atherosclerosis etc&#x2026; Each tissues and cells have a different ability to adapt to this new condition. During hypoxia, hypoxia inducible factor alpha (HIF) is stabilized and regulates various genes such as those involved in angiogenesis or transport of oxygen 4. The stabilization of this protein is a hallmark of hypoxia, therefore detecting HIF is routinely used to screen for hypoxia 5-7. 
In this article, we propose two simple methods to induce hypoxia in mammalian cell cultures and simple tests to evaluate the hypoxic status of these cells.

Here we propose simple methods to induce hypoxia in cell cultures and simple tests to evaluate the hypoxic status of the cultures.

세포 배양의 유도와 Hypoxia의 시험

Hypoxia is defined as the reduction or lack of oxygen in organs, tissues, or cells.  This decrease of oxygen tension can be due to a reduced supply in ...

Chromatographic Purification of Highly Active Yeast Ribosomes

Eukaryotic ribosomes are much more labile as compared to their eubacterial and archael counterparts, thus posing a significant challenge to researchers. Particularly troublesome is the fact that lysis of cells releases a large number of proteases and nucleases which can degrade ribosomes. Thus, it is important to separate ribosomes from these enzymes as quickly as possible. Unfortunately, conventional differential ultracentrifugation methods leaves ribosomes exposed to these enzymes for unacceptably long periods of time, impacting their structural integrity and functionality. To address this problem, we utilize a chromatographic method using a cysteine charged Sulfolink resin. This simple and rapid application significantly reduces co-purifying proteolytic and nucleolytic activities, producing high yields of intact, highly biochemically active yeast ribosomes. We suggest that this method should also be applicable to mammalian ribosomes. The simplicity of the method, and the enhanced purity and activity of chromatographically purified ribosome represents a significant technical advancement for the study of eukaryotic ribosomes.

Contamination of preparations of eukaryotic ribosomes purified by traditional methods by co-purifying nucleases and proteases negatively impacts on downstream biochemical and structural analyses. A rapid and simple chromatographic purification method is used to solve this problem using yeast ribosomes as a model system.

높은 활성 효모 변이의 색층 정화

Eukaryotic ribosomes are much more labile as compared to their eubacterial and archael counterparts, thus posing a significant challenge to researchers.  ...

Efficient Derivation of Human Cardiac Precursors and Cardiomyocytes from Pluripotent Human Embryonic Stem Cells with Small Molecule Induction

To date, the lack of a suitable human cardiac cell source has been the major setback in regenerating the human myocardium, either by cell-based transplantation or by cardiac tissue engineering1-3. Cardiomyocytes become terminally-differentiated soon after birth and lose their ability to proliferate. There is no evidence that stem/progenitor cells derived from other sources, such as the bone marrow or the cord blood, are able to give rise to the contractile heart muscle cells following transplantation into the heart1-3. The need to regenerate or repair the damaged heart muscle has not been met by adult stem cell therapy, either endogenous or via cell delivery1-3. The genetically stable human embryonic stem cells (hESCs) have unlimited expansion ability and unrestricted plasticity, proffering a pluripotent reservoir for in vitro derivation of large supplies of human somatic cells that are restricted to the lineage in need of repair and regeneration4,5. Due to the prevalence of cardiovascular disease worldwide and acute shortage of donor organs, there is intense interest in developing hESC-based therapies as an alternative approach. However, how to channel the wide differentiation potential of pluripotent hESCs efficiently and predictably to a desired phenotype has been a major challenge for both developmental study and clinical translation. Conventional approaches rely on multi-lineage inclination of pluripotent cells through spontaneous germ layer differentiation, resulting in inefficient and uncontrollable lineage-commitment that is often followed by phenotypic heterogeneity and instability, hence, a high risk of tumorigenicity6-8 (see a schematic in Fig. 1A). In addition, undefined foreign/animal biological supplements and/or feeders that have typically been used for the isolation, expansion, and differentiation of hESCs may make direct use of such cell-specialized grafts in patients problematic9-11. To overcome these obstacles, we have resolved the elements of a defined culture system necessary and sufficient for sustaining the epiblast pluripotence of hESCs, serving as a platform for de novo derivation of clinically-suitable hESCs and effectively directing such hESCs uniformly towards clinically-relevant lineages by small molecules12 (see a schematic in Fig. 1B). After screening a variety of small molecules and growth factors, we found that such defined conditions rendered nicotinamide (NAM) sufficient to induce the specification of cardiomesoderm direct from pluripotent hESCs that further progressed to cardioblasts that generated human beating cardiomyocytes with high efficiency (Fig. 2). We defined conditions for induction of cardioblasts direct from pluripotent hESCs without an intervening multi-lineage embryoid body stage, enabling well-controlled efficient derivation of a large supply of human cardiac cells across the spectrum of developmental stages for cell-based therapeutics.

We have established a protocol for induction of cardioblasts direct from pluripotent human embryonic stem cells maintained under defined conditions with small molecules, which enables derivation of a large supply of human cardiac progenitors and functional cardiomyocytes for cardiovascular repair.

작은 분자와 유도 Pluripotent 인간 배아 줄기 세포로부터 인간 심장 엽 성의 전구 물질과 Cardiomyocytes의 효율 유도

To date, the lack of a suitable human cardiac cell source has been the major setback in regenerating the human myocardium, either by cell-based ...

Long-term Lethal Toxicity Test with the Crustacean Artemia franciscana

Our research activities target the use of biological methods for the evaluation of environmental quality, with particular reference to saltwater/brackish water and sediment. The choice of biological indicators must be based on reliable scientific knowledge and, possibly, on the availability of standardized procedures. In this article, we present a standardized protocol that used the marine crustacean Artemia to evaluate the toxicity of chemicals and/or of marine environmental matrices. Scientists propose that the brine shrimp (Artemia) is a suitable candidate for the development of a standard bioassay for worldwide utilization. A number of papers have been published on the toxic effects of various chemicals and toxicants on brine shrimp (Artemia). The major advantage of this crustacean for toxicity studies is the overall availability of the dry cysts; these can be immediately used in testing and difficult cultivation is not demanded1,2. Cyst-based toxicity assays are cheap, continuously available, simple and reliable and are thus an important answer to routine needs of toxicity screening, for industrial monitoring requirements or for regulatory purposes3. The proposed method involves the mortality as an endpoint. The numbers of survivors were counted and percentage of deaths were calculated. Larvae were considered dead if they did not exhibit any internal or external movement during several seconds of observation4. This procedure was standardized testing a reference substance (Sodium Dodecyl Sulfate); some results are reported in this work. This article accompanies a video that describes the performance of procedural toxicity testing, showing all the steps related to the protocol.

Long-term Lethal Toxicity Test with the Crustacean Artemia franciscana

This study concerns the development and standardization of a valuable methodological protocol to determine long-term (14 days) lethal toxicity exerted by chemical substances, industrial wastewater or sewage and liquid environmental samples on the saltwater crustacean, Artemia franciscana.

갑각류와 장기 치명적인 독성 시험 Artemia franciscana</em

Our research activities target the use of biological methods for the evaluation of environmental quality, with particular reference to saltwater/brackish ...

In Vitro Synthesis of Modified mRNA for Induction of Protein Expression in Human Cells

The exogenous delivery of coding synthetic messenger RNA (mRNA) for induction of protein synthesis in desired cells has enormous potential in the fields of regenerative medicine, basic cell biology, treatment of diseases, and reprogramming of cells. Here, we describe a step by step protocol for generation of modified mRNA with reduced immune activation potential and increased stability, quality control of produced mRNA, transfection of cells with mRNA and verification of the induced protein expression by flow cytometry. Up to 3 days after a single transfection with eGFP mRNA, the transfected HEK293 cells produce eGFP. In this video article, the synthesis of eGFP mRNA is described as an example. However, the procedure can be applied for production of other desired mRNA. Using the synthetic modified mRNA, cells can be induced to transiently express the desired proteins, which they normally would not express.

In Vitro Synthesis of Modified mRNA for Induction of Protein Expression in Human Cells

In this video article, we describe the in vitro synthesis of modified mRNA for induction of protein expression in cells.

체외 합성에 인간의 세포에서 단백질 발현 유도의 mRNA를 수정의

The exogenous delivery of coding synthetic messenger RNA (mRNA) for induction of protein synthesis in desired cells has enormous potential in the fields ...

Experimental Protocol for Using Drosophila As an Invertebrate Model System for Toxicity Testing in the Laboratory

Emergent properties and external factors (population-level and ecosystem-level interactions, in particular) play important roles in mediating ecologically-important endpoints, though they are rarely considered in toxicological studies. D. melanogaster is emerging as a toxicology model for the behavioral, neurological, and genetic impacts of toxicants, to name a few. More importantly, species in the genus Drosophila can be utilized as a model system for an integrative framework approach to incorporate emergent properties and answer ecologically-relevant questions in&#160;toxicology research. The aim of this paper is to provide a protocol for exposing species in the genus Drosophila to pollutants to be used as a model system for a range of phenotypic outputs and ecologically-relevant questions. More specifically, this protocol can be used to 1) link multiple biological levels of organization and understand the impact of toxicants on both individual- and population-level fitness; 2) test the impact of toxicants at different stages of developmental exposure; 3) test multigenerational and evolutionary implications of pollutants; and 4) test multiple contaminants and stressors simultaneously.

Experimental Protocol for Using Drosophila As an Invertebrate Model System for Toxicity Testing in the Laboratory

In this paper, we provide a detailed protocol for exposing species in the genus Drosophila to pollutants with the goal of studying the impact of exposure on a range of phenotypic outputs at different developmental stages and for more than one generation.