Name: conformational evaluation of hiv-1 trimeric envelope glycoproteins using a cell-based elisa assay
Uploaded: 2014-09-14T15:00:00
Description: Watch this Scientific Journal Video about Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay at JoVE.com

私たちは彼の寛大なA32の贈り物、17bと、48D、およびC11 mAbの博士ジェームズ·ロビンソンに感謝します。 PGT 121は、NIH AIDS試薬プログラム、エイズ、NIAID、NIH（カタログ番号12343）の事業を通じて得られた。この作品は、科学者が、AFにしてCRCHUM連続グラントによってだけでなく、CIHR触媒グラント＃126630によって＃24639を付与ヤングのFRQS設立により、CIHRオペレーティング＃257792により、イノベーション拠点リーダーの＃29866のためのカナダ財団によってサポートされていましたAFとMRへ。 AFはFRSQ Chercheur Boursierジュニア1フェローシップ＃の24639の受信者である。 MVはCIHR博士研究賞の＃291485によってサポートされていました。

1 1日目 - 細胞培養<ol><li>プレート2×10 4ヒト骨肉腫（HOS）発光読み取りに適した不透明な96ウェル細胞培養プレート中のウェルあたりの細胞。 10％ウシ胎児血清（FBS）および100 U / mlペニシリン - ストレプトマイシンを補充したダルベッコ改変イーグル培地（DMEM）を使用する。 37°C、5％CO 2で翌日までインキュベートする。 </li></ol> 2 2日目 - ポリエチレンイミ?...

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Virol. 69, 166-171 (1995).</li></ol>

このアッセイは、HIV-1 Envの三量体が細胞表面で発現を特異的mAbの相互作用を検出するために最適化される。プロトコルが確立されると、それは全体的に低い材料コストおよび抗体の少ない量で高いスループットを培地で使用することができる。このアッセイは、トランスフェクションに基づいているので、容易にEnvのコンホメーションに及ぼす影響を研究するために、CD4のような細胞タンパ?...

三量体ウイルスエンベロープ糖タンパク質（Envの）によって媒介されるヒト免疫不全ウイルス1型（HIV-1）のエントリは、感染サイクルの第一段階である。ビリオンの表面に提示のみさらさウイルス抗原なので、Envの三量体は、中和および非中和抗体を誘発する。このように、ワクチンの免疫原の設計のための興味深い候補を表わす。しかし、可溶性または組換え形態におけるのEnvを用いたワクチン接種試験は最も主要なHIV-1に対する最小限の有効性応答を誘発し1-3を分離します。それにもかかわらず、RV144ワクチン臨床試験4で観察された部分的な有効性は、免疫原候補として、HIV-1のEnvに興味をリニューアルしました。これは、ワクチン誘発抗-ENV抗体はSIVとHIV 5挑戦に対する保護のある程度を生成するのに十分であったことを記述した最近の研究によって確証された。 小胞体内で合成された後、Envのglycoprote前駆体のgp160に、ウィルス融合プロセスを燃料する能力にとって重要なさまざまな翻訳後修飾を受ける。のEnv前駆体は、gp120-gp41の ​​リエゾンを維持し非共有相互作用で、その細胞質外gp120およびgp41の ​​膜貫通サブユニット6-10に切断される前に、三量体で適切に関連付ける倍なければなりません。感染した細胞の機構も大きく、その総質量11,12の約​​50％を占めたEnvをグリコシル化する責任があります。良い異なるコンホメーションを理解することの重要性を強調し、Envのが適応し、それ以外の場合は15〜19を暴露される特定の高度に免疫原性エピトープを非表示にすることを可能にすると考えられている準安定性を提供しながら、得られた複合体構造は、Envのは13,14立体構造的に柔軟であることを可能にするネイティブのEnv三量体によってサンプリング。 今日までに、いくつかの技術が開発され、首尾よくEnvのコンホメーションchのを研究するために使用されているアンジェス。しかし、それらは多くの場合、特定のEnvコンテキストに限定されるものでは、その限界が異なります。例えば、表面プラズモン共鳴またはコンフォメーション特異的モノクローナル抗体を用いた免疫沈降アッセイ（mAb）は、どちらかは、それらの三量体形態20,21からの免疫遺伝学的に異なることが知られている単量体の可溶性または可溶化のEnv分子に依存している。最近の研究ではまた、切断は主に抗体14,22,23を非中和により認識されるエピトープの露出をもたらしたEnvのコンフォメーションに影響を与えることを示唆している。 ここでは詳細にcellularly発現さのEnv三量体18,24-26のコンフォメーションの迅速かつ容易な決定を可能にする方法が記載されている。ヒトの付着性細胞株におけるのEnvの一過性トランスフェクション後のEnv特異的抗体の結合は、単純な化学発光反応を用いて検出される。この技術は、コンフォメーションdepenの立体配座優先性を特徴付けるために使用することができる凹み抗体。したがって、このアッセイは、堅牢で柔軟性の高い検出方法を提供する。

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			<td height="21" style="height:21px;width:216px;">HOS cells</td>
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			<td height="42" style="height:42px;width:216px;">White Opaque Tissue Culture Plate, 96 well, Flat Bottom</td>
			<td style="width:103px;">BD</td>
			<td align="right" style="width:119px;">353296</td>
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			<td height="42" style="height:42px;width:216px;">Polyethylenimine, linear, 25000 MW</td>
			<td style="width:103px;">Polysciences</td>
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			<td>Prepared in 1mg/ml solution</td>
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			<td height="42" style="height:42px;width:216px;">Goat Anti-Human IgG, Peroxidase Conjugated</td>
			<td style="width:103px;">Pierce</td>
			<td align="right" style="width:119px;">31413</td>
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			<td height="42" style="height:42px;width:216px;">Enhanced Chemiluminescence Substrate</td>
			<td style="width:103px;">PerkinElmer</td>
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conformational evaluation of hiv-1 trimeric envelope glycoproteins using a cell-based elisa assay

HIV-1 envelope glycoproteins (Env) mediate viral entry into target cells and are essential to the infectious cycle. Understanding how those glycoproteins are able to fuel the fusion process through their conformational changes could lead to the design of better, more effective immunogens for vaccine strategies. Here we describe a cell-based ELISA assay that allows studying the recognition of trimeric HIV-1 Env by monoclonal antibodies. Following expression of HIV-1 trimeric Env at the surface of transfected cells, conformation specific anti-Env antibodies are incubated with the cells. A horseradish peroxidase-conjugated secondary antibody and a simple chemiluminescence reaction are then used to detect bound antibodies. This system is highly flexible and can detect Env conformational changes induced by soluble CD4 or cellular proteins. It requires minimal amount of material and no highly-specialized equipment or know-how. Thus, this technique can be established for medium to high throughput screening of antigens and antibodies, such as newly-isolated antibodies.

上記した一般的手順を用いて、野生型（wt）又は変異EnvのいずれかでたCD4iエピトープの露出に対する可溶性CD4（sCD4を）と共発現細胞のCD4の影響をアッセイするためのプロトコルを適合18,24前述したように、 25,28。 図1は、一般的な手順とsCD4を持つまたは携帯CD4 18の共発現による治療後のたCD4iエピトープの露出を表しています。 図2では、私た...

Watch this Scientific Journal Video about Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay at JoVE.com

Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay

細胞ベースのELISAアッセイを使用して、HIV-1エンベロープ糖タンパク質三量体の構造評価

Understanding viral surface antigens conformations is required to evaluate antibody neutralization and guide the design of effective vaccine immunogens. Here we describe a cell-based ELISA assay that allows the study of the recognition of trimeric HIV-1 Env expressed at the surface of transfected cells by specific anti-Env antibodies.

HIV-1 envelope glycoproteins (Env) mediate viral entry into target cells and are essential to the infectious cycle. Understanding how those glycoproteins ...

Research

JoVE Journal

Immunology and Infection

Specific Marking of HIV-1 Positive Cells using a Rev-dependent Lentiviral Vector Expressing the Green Fluorescent Protein

緑色蛍光タンパク質を発現するリビジョンに依存するレンチウイルスベクターを用いたHIV - 1陽性細胞の特定のマーキング

Most of HIV-responsive expression vectors are based on the HIV promoter, the long terminal repeat (LTR). While responsive to an early HIV protein, Tat, ...

Genotypic Inference of HIV-1 Tropism Using Population-based Sequencing of V3

V3の人口ベースのシーケンシングを用いたHIV - 1トロピズムの遺伝子型推論

Background: Prior to receiving a drug from CCR5-antagonist class in HIV therapy, a patient must undergo an HIV tropism test to confirm that his or her ...

Determination of Molecular Structures of HIV Envelope Glycoproteins using Cryo-Electron Tomography and Automated Sub-tomogram Averaging

低温電子断層撮影と自動化されたサブ断層アベレージングを使用して、HIVエンベロープ糖タンパク質の分子構造の決定

Since its discovery nearly 30 years ago, more than 60 million people have been infected with the human immunodeficiency virus (HIV) (www.usaid.gov). The ...

Prediction of HIV-1 Coreceptor Usage (Tropism) by Sequence Analysis using a Genotypic Approach

Prediction of HIV-1 Coreceptor Usage Tropism by Sequence Analysis using a Genotypic Approach

遺伝子型アプローチを用いた配列解析によるHIV-1コレセプター使用（指向性）の予測

Maraviroc (MVC) is the first licensed antiretroviral drug from the class of coreceptor antagonists. It binds to the host coreceptor CCR5, which is used by ...

In vitro Uncoating of HIV-1 Cores

In vitro Uncoating of HIV-1 Cores

HIV - 1コアのin vitroでの脱殻で

The genome of the retroviruses is encased in a capsid surrounded by a lipid envelope. For lentiviruses, such as HIV-1, the conical capsid shell is ...

Imaging of HIV-1 Envelope-induced Virological Synapse and Signaling on Synthetic Lipid Bilayers

合成脂質二重膜上でHIV-1エンベロープ誘発性ウイルス学的シナプスとシグナリングのイメージング

Human immunodeficiency virus type 1 (HIV-1) infection occurs most efficiently via cell to cell transmission2,10,11. This cell to cell transfer between ...

Assessing the Innate Sensing of HIV-1 Infected CD4+ T Cells by Plasmacytoid Dendritic Cells Using an Ex vivo Co-culture System.

Assessing the Innate Sensing of HIV-1 Infected CD4+ T Cells by Plasmacytoid Dendritic Cells Using an Ex vivo Co-culture System.

HIV-1感染CD4の生得センシングを評価<sup&gt; +</sup&gt;使用して形質細胞様樹状細胞によるT細胞<em&gt;エクスビボ</em&gt;共培養系。

HIV-1 innate sensing requires direct contact of infected CD4+ T cells with plasmacytoid dendritic cells (pDCs). In order to study this process, the ...

Nucleocapsid Annealing-Mediated Electrophoresis (NAME) Assay Allows the Rapid Identification of HIV-1 Nucleocapsid Inhibitors

Nucleocapsid Annealing-Mediated Electrophoresis NAME Assay Allows the Rapid Identification of HIV-1 Nucleocapsid Inhibitors

ヌクレオカプシドアニーリング媒介電気泳動（NAME）アッセイは、HIV-1ヌクレオカプシド阻害剤の迅速な同定を可能にする

RNA or DNA folded in stable tridimensional folding are interesting targets in the development of antitumor or antiviral drugs. In the case of HIV-1, viral ...

Isolation of Exosomes from the Plasma of HIV-1 Positive Individuals

HIV-1陽性個体の血漿からエキソソームの単離

Exosomes are small vesicles ranging in size from 30 nm to 100 nm that are released both constitutively and upon stimulation from a variety of cell types. ...

Evaluation of the Efficacy And Toxicity of RNAs Targeting HIV-1 Production for Use in Gene or Drug Therapy

遺伝子または薬物療法で使用するためのHIV-1産生を標的RNAの有効性および毒性の評価

Small RNA therapies targeting post-integration steps in the HIV-1 replication cycle are among the top candidates for gene therapy and have the potential ...