Name: evaluation of the efficacy of the h. pylori protein hp-nap as a therapeutic tool for treatment of bladder cancer in an orthotopic murine model
Uploaded: 2015-05-29T15:00:00.000+00:00
Duration: 6 min 12 s
Description: Watch this Scientific Journal Video about Evaluation of the Efficacy of the H. pylori Protein HP-NAP as a Therapeutic Tool for Treatment of Bladder Cancer in an Orthotopic Murine Model at JoVE.com

この作品は、者協会イタリアーナあたりラRicercaスルCancro、大学のイタリアの研究省、PrinプロジェクトとPROGETTIディRicercaディアテネオ、付与N°CPDA137871、Fondazione Cariploでサポートされていた、NはMDBに2011から0485を°、およびFinanziamento Giovaniによって付与ガイアCodoloにStudiosi、パドヴァ大学、。

動物取扱すべての手順は、保健のイタリア省（DM 2011分の204-B）によって承認されています。 1.動物<ol><li> microisolationフィルターと個別換気ケージに生後8週間のC57BL6 / J雌マウスを育てます。 注：その外部泌尿生殖器装置の解剖学的立体構造が男性よりカテーテル簡単に描画するため、女性が好ましいです。 </li></ol> 2.細胞培養<ol><li>加湿5％CO 2中、37℃で10％熱不活化ウシ胎児血清および50μg/ mlのゲンタマイシンを補充したRPMI 1640培地中のマウスの尿路上皮癌細胞株MB49を維持します。 </li><li> 80％のコンフルエンスにT-75フラスコ中MB49細胞を成長させます。トリプシン処理し、0.5×10 5で再懸濁-マウスでは、移植前にPBSを150μlあたり0.5×10 6個の細胞。 </li></ol> 3.膀胱内腫瘍インプラント<ol><li> （それぞれ、33ミリグラム/ kgおよび20mg / kg）麻酔薬のzoletilとxylorのミックスを使用して、マウスを麻酔、腹腔内に注射しました。 </li><li>仰臥位で動物を置き、スコッチテープでパッドに後ろ足を固定します。足は十分に可視およびカテーテルの挿入のために簡単にアクセス尿道口をレンダリングするために分離しなければなりません。 </li><li>注：カテーテルは、24 G小児静脈カテーテルは、8〜10週齢のマウスに適しています。カテーテルの選択は、尿道壁とカテーテルとの間の液体の漏れを回避するために非常に重要です。大きな穴カテーテルは大きくなったり、古いマウスを使用する必要があります。 </li><li>小さなニッパーを使用して、尿道の外側部分の一方の端をつまんで、マウスの「ヘッドエンド」に向かって非常に軽くねじります。このアクションは、尿道口を露出させます。 </li><li>カテーテルの内部針を外し、45°の角度で尿道に後者を挿入し、少し指向マウスの「末尾」に向けました。カテーテルの入り口を無理に押し込まないでください。それは尿道の内側にスリップまで抵抗の場合には、ちょうど、非常に静かにカテーテルをねじります。カテーテルの約0.5〜0.8センチメートルが尿道内にある場合には、慎重にマウスの尾にカテーテル平行に配置し、それを完全に挿入します。 </li><li> 1mlシリンジを使用して、カテーテル内に挿入しなければならないそれらの針は、滅菌PBSの200-300μLを注入することにより、残存尿から膀胱を洗浄し、膀胱からすべての液体を吸引します。 </li><li>注：PBSを注入すると、膀胱がいっぱいになり、腫れがマウスの後ろ足の間に表示されます。これは、カテーテルが正しいことを確認します。ほとんどのカテーテルは、注入量を計算するときに考慮しなければならないデッドボリュームを有しています。 </li><li>滅菌1mlシリンジを使用して、0.1 N HClを200μLを注入します。その壁全体を燃焼させるために膀胱を埋めます。 10秒後、すぐにすべての酸を除去し、neutrali滅菌シリンジで0.1 N NaOHを200μLを注入することによりぜ。細胞（0.5×10 6）の最大数の注入の場合には、酸性化工程は不要です。 </li><li>吸引し、すべての残液と直ちに滅菌PBS300μlの空洞を洗浄します。 </li><li>吸引によって膀胱を空にし、MB49細胞（範囲0.5×10 5から0.5×10 6）を含むPBSを150μlを注入膀胱に。細胞の漏れを回避するために、カテーテルに組み立てられた注射器を残します。これは、スコッチテープでパッドにそれを固定することにより、シリンジを確保することをお勧めします。 </li><li> 1時間後、静かに尿道からカテーテルを抽出し、彼らが目を覚ましまで白熱灯の下で、ケージ内にマウスを置きます。これは通常、治療の終了後1及び2時間の間に発生します。 </li></ol> HP-NAPの4膀胱内デリバリー<ol><li>注：細胞の点滴注入後、少なくとも3日、それを開始することが可能です治療。 </li><li>ステップ3.1から3.4に記載されているようにカテーテルを挿入します。この段階では、HClを用いて膀胱壁を燃焼させる必要がありません。 </li><li> 1ミリリットル注射器を用いて、滅菌PBSの200〜300μLを注入することにより、残留尿から膀胱を洗浄し、膀胱からすべての液体を吸引します。 </li><li>膀胱内に150μlのPBSあたりHP-NAP50μgのを注入します。タンパク質溶液の漏れを回避するためにカテーテルに取り付けたシリンジのままにしておきます。スコッチテープでパッドにそれを固定することにより、注射器を固定します。 </li><li>彼らが目を覚ましまで、白熱灯の下で、1時間後、静かに尿道からカテーテルを抽出し、ケージ内にマウスを置きます。 </li></ol> 5.腫瘍外植片および組織学的分析<ol><li>処理の終わりに、動物を犠牲に仰向けの位置にそれらを配置し、スコッチテープでパッドに後ろ足を固定します。 </li><li>手術用メスを用いて、皮膚を​​通して約1.52センチメートル長い縦切開を作ります腹膜は、マウスの「ヘッドエンド」にちょうど外性器の上に出発します。膀胱を損傷する危険性を最小限に抑えるために、カットの深さに特に注意を払います。 </li><li>膀胱は、カットの中央左に配置されますと、腫瘍は濃いピンク/バイオレット質量として表示されます。その切除の際に、組織学的ケージに膀胱全体を配置し、パラフィンに包埋する前に、10％緩衝ホルマリンで固定します。 </li><li>組織学的および免疫組織化学的分析のために、標準的なミクロトームを用いて膀胱（46ミクロン厚）の連続切片を準備します。 </li><li>ヘマトキシリン/エオシンを持つセクションを染色し、腫瘍の大きさ（DのXD 2）、コンピュータ支援画像解析装置を用いて、断面積あたりの壊死の割合を決定するための計算を進めます。 </li><li>血管計数は、標準的な免疫ペルオキシダーゼ技術を用いて、内皮マーカーCD31 / PECAMためのセクションを染色することによって進行します。セクションをスキャン最高の血管密度の領域を特定するために（4×）、低消費電力をトン。この領域内では、高出力（20×）で5つの別々のランダムな分野で個々の微小血管をカウントします。 </li></ol>

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著者は、彼らが競合する金融利害関係がないことを宣言します。

癌治療の進歩の大部分は、臨床試験を開始する前に、動物モデルでテストを必要とします。動物モデルを利用して、 インビボでの腫瘍生物学を研究する可能性は、異なる治療法の評価を可能とする、癌の発病を調査する研究者のための重要なツールです。同所モデルは、腫瘍モデルを設定し、それらが天然に存在する腫瘍16の環境を模倣するためにするための細胞株の膨大な?...

膀胱癌は、米国1で約75,000の新たな症例は毎年で、尿生殖路の最も一般的な癌の一つです。再発の高い割合は、膀胱癌治療のための最も高価な癌のいずれかを行う生涯フォローアップを必要とします。高品位NMIBC金標準的な治療はBCG膀胱内での免疫療法に続いて、トランス尿道的切除です。 BCGの抗腫瘍活性の正確なメカニズムは完全には解明されないままであるが、それは、Tヘルパー（TH）1と、細胞傷害性T（TC）1細胞が濃縮された細胞性免疫応答の活性化のために重要であることが認められています治療2の成功。 BCGはNMIBCのための選択の治療法が残っているという事実にもかかわらず、治療に反応しない患者の割合が高いです。しかも、それは多くの副作用を引き起こす可能性があります。処理された腫瘍の約70％は、筋肉侵襲性の形態に〜15％の進捗状況をいくつかの時間後に再発し、病気。 BCG治療に関連する他の副作用は排尿障害、膀胱炎や腎感染3-6を含みます。 新たな治療戦略の開発は、最初のin vitroでの評価以下、考慮に前臨床モデルの使用を取る必要があります。これは、その微小環境大幅に処理し、その開発と応答性に影響を与えることができる腫瘍に特に関連します。 過去10年間、私たちはHP-NAP、細菌ヘリコバクター·ピロリによって産生されるタンパク質の免疫調節活性の複数の側面に対処している、最初に多形核細胞（PMNの）7の内皮接着を促進することができるように同定しました。構造的には、HP-NAPは、飢餓状態の条件（DPS）ファミリー8下のDNA保護タンパク質に属し、12量体シェル内に配置された12の同一のサブユニットから構成されています。 我々は、HP-NAPであることが実証されていますインビトロおよびインビボの両方で 9~10、のTh1表現型へのTリンパ球の分化を駆動するための責任強い免疫調節活性を有するToll様受容体（TLR）2アゴニスト。この活動のおかげで、HP-NAPは、アレルギー性喘息11のマウスモデルにおいて、より有益なTh1応答にTh2免疫応答をリダイレクトすることができます。 HP-NAPのにTh1依存性の抗腫瘍性を評価するために、我々は、BCG投与の影響を評価するためのオドネルと同僚12によって、数年前に開発膀胱癌のマウスモデルを利用しました。 このプロトコルでは、我々はHP-NAPは、膀胱癌に対する強力な抗腫瘍ポテンシャルを持っていること、およびHP-NAP投与の有効性は、（インターフェロンを生産両方のTh1とTc1のリンパ球、腫瘍および所属リンパ節内に、有意な蓄積と平行していることを実証しますIFN）は13-γ </SUP&gt;。 HP-NAP-処置したマウスから単離された腫瘍は、より多くの壊死および未処理の対応物より少ない血管新生を示しました。 本報告書では、動物の準備、それらの尿道カテーテル、膀胱粘膜への細胞の付着、および腫瘍細胞の注射のために必要な化学燃焼を詳述、stepbystepプロトコルを提供します。また、膀胱癌の治療のために開発された任意の治療薬の原型とみなすことができるHP-NAPの局所投与を記載しています。制御とHP-NAP-処置動物から単離された腫瘍を比較することによって得られた証拠はないだけで、HP-NAPは、膀胱癌免疫療法のための優れた候補だけでなく、実験設定の一般的な有効性とすることができるという事実を強調しています。

<table><tbody><tr><td colspan="4">Materials</td></tr><tr><td>C57BL/6J female mice</td><td>Harlan Italy (Udine, Italy)</td><td></td><td></td></tr><tr><td>MB49 Cells</td><td></td><td></td><td>Obtained from Prof. O&#039;Donnel, University of Iowa Carver College of Medicine, Iowa, USA</td></tr><tr><td>RPMI</td><td>Sigma-Aldrich (St. Louis, Missouri, USA)</td><td>R8758</td><td></td></tr><tr><td>FBS</td><td>Sigma-Aldrich</td><td>F7524</td><td></td></tr><tr><td>PBS</td><td>Sigma-Aldrich</td><td>D1408</td><td>10X, to be diluted in apyrogenic water</td></tr><tr><td>Flask</td><td>Becton Dickinson (Franklin Lakes, New Jersey, USA)</td><td>353135</td><td></td></tr><tr><td>Syringe 1ml</td><td>Becton Dickinson</td><td>301358</td><td></td></tr><tr><td>Trypsin</td><td>Life Technologies (Waltham, Massachusetts, USA)</td><td></td><td></td></tr><tr><td>Gentamycin</td><td>Life Technologies</td><td>15710-049</td><td></td></tr><tr><td>Xilor</td><td>Bio 98 s.r.l. (Milano, Italy)</td><td></td><td>2% Xylazin</td></tr><tr><td>Zoletil</td><td>Virbac (Carros, France)</td><td>359713301992</td><td>5% Zolazepam + 5% Tiletamine</td></tr><tr><td>24G Catheter</td><td>Terumo (Rome, Italy)</td><td>SR+DM2419PX</td><td></td></tr><tr><td>HCl</td><td>Carlo Erba Reagents (Milano, Italy)</td><td>403871</td><td>Liquid</td></tr><tr><td>NaOH</td><td>JT Baker (Center Valley, Pennsylvania, USA)</td><td>10095011</td><td>Powder</td></tr><tr><td colspan="4">Equipment</td></tr><tr><td>Surgical Scalpel</td><td>Albion Surgical Limited (Sheffield, England)</td><td></td><td></td></tr><tr><td>Microtome</td><td>Leica Microsystem ( Wetzlar, Germany)</td><td>RM2235</td><td></td></tr><tr><td>Microscope Slides</td><td>VWR International (Radnor, Pennsylvania, USA)</td><td>631-0108</td><td></td></tr><tr><td>Image Analyzer</td><td>Zeiss (Jena, Germany)</td><td>Cyres System</td><td></td></tr></tbody></table>

evaluation of the efficacy of the h. pylori protein hp-nap as a therapeutic tool for treatment of bladder cancer in an orthotopic murine model

Bladder cancer is one of the most common malignancies of the urogenital tract. Intravesical injection of Bacillus Calmette-Gu&#233;rin (BCG) is the gold standard treatment for the high-grade non-muscle invasive bladder cancer (NMIBC). However, since the treatment-related side effects are relevant, newer biological response modifiers with a better benefit/side effects ratio are needed.
The tumour microenvironment can influence both tumour development and therapy efficacy. In order to obtain a good model, it is desirable to implant tumour cells in the organ from which the cancer originates.
In this protocol, we describe a method for establishing a tumour in the bladder cavity of female mice and subsequent delivery of therapeutic agents; the latter are exemplified by our use of Helicobacter pylori neutrophil activating protein (HP-NAP). A preliminary chemical burn of the mucosa, followed by the injection of mouse urothelial carcinoma cell line MB49 via urethral catheterization, enables the cells to attach to the bladder mucosa. After a period, required to allow an initial proliferation of the cells, mice are treated with HP-NAP, administrated again via catheterization. The anti-tumour activity of HP-NAP is evaluated comparing the tumour volume, the extent of necrosis and the degree of vascularization between vehicle- and HP-NAP-treated animals.

図1は、カテーテル法を示す図です。マウスは、カテーテルを挿入し、0.5×10 6 MB49細胞を点滴注入されます。 HP-NAPによる治療は、膀胱壁に付着し、増殖することを可能にするために、3日目の腫瘍細胞の注射後に開始されます。対照群に属する全ての動物は腫瘍を発症します。それらのいくつかは、尿道の閉塞による13日間の期間の終了前に死亡することがあります。 <p...

Watch this Scientific Journal Video about Evaluation of the Efficacy of the H. pylori Protein HP-NAP as a Therapeutic Tool for Treatment of Bladder Cancer in an Orthotopic Murine Model at JoVE.com

Evaluation of the Efficacy of the H. pylori Protein HP-NAP as a Therapeutic Tool for Treatment of Bladder Cancer in an Orthotopic Murine Model

Here the method to establish a syngeneic mouse model of orthotopic bladder tumour to evaluate the anti-tumour efficacy of the bacterial protein HP-NAP is described.

の有効性の評価<em&gt; H。ピロリ</em同所性マウスモデルにおける膀胱癌の治療のための治療ツールとして&gt;タンパク質HP-NAP

Bladder cancer is one of the most common malignancies of the urogenital tract. Intravesical injection of Bacillus Calmette-Gu&#233;rin (BCG) is the gold ...

evaluation-efficacy-h-pylori-protein-hp-nap-as-therapeutic-tool-for

Research

JoVE Journal

Medicine

Evaluation of the Efficacy of the H. pylori Protein HP-NAP as a Therapeutic Tool for Treatment of Bladder Cancer in an Orthotopic Murine Model

7.2K ビュー.  University of Padua. Here the method to establish a syngeneic mouse model of orthotopic bladder tumour to evaluate the anti-tumour efficacy of the bacterial protein HP-NAP is described.

ビデオ: Evaluation of the Efficacy of the H. pylori Protein HP-NAP as a Therapeutic Tool for Treatment of Bladder Cancer in an Orthotopic Murine Model

A Murine Orthotopic Bladder Tumor Model and Tumor Detection System

This protocol describes the generation of bladder tumors in female C57BL/6J mice using the murine bladder cancer cell line MB49, which has been modified to secrete human Prostate Specific Antigen (PSA), and the procedure for the confirmation of tumor implantation. In brief, mice are anesthetized using injectable drugs and are made to lay in the dorsal position. Urine is vacated from the bladder and 50 &#181;L of poly-L-lysine (PLL) is slowly instilled at a rate of 10 &#181;L/20 s using a 24 G IV catheter. It is left in the bladder for 20 min by stoppering the catheter. The catheter is removed and PLL is vacated by gentle pressure on the bladder. This is followed by instillation of the murine bladder cancer cell line (1 x 105 cells/50 &#181;L) at a rate of 10 &#181;L/20 s. The catheter is stoppered to prevent premature evacuation. After 1 h, the mice are revived with a reversal drug, and the bladder is vacated. The slow instillation rate is important, as it reduces vesico-ureteral reflux, which can cause tumors to occur in the upper urinary tract and in the kidneys. The cell line should be well re-suspended to reduce clumping of cells, as this can lead to uneven tumor sizes after implantation.
This technique induces tumors with high efficiency. Tumor growth is monitored by urinary PSA secretion. PSA marker monitoring is more reliable than ultrasound or fluorescence imaging for the detection of the presence of tumors in the bladder. Tumors in mice generally reach a maximum size that negatively impacts health by about 3 - 4 weeks if left untreated. By monitoring tumor growth, it is possible to differentiate mice that were cured from those that were not successfully implanted with tumors. With only end-point analysis, the latter may be mistakenly assumed to have been cured by therapy.

This protocol describes the generation of murine orthotopic bladder tumors in female C57BL/6J mice and the monitoring of tumor growth.

マウス同所性膀胱腫瘍モデルおよび腫瘍検出システム

This protocol describes the generation of bladder tumors in female C57BL/6J mice using the murine bladder cancer cell line MB49, which has been modified ...

がん研究

Mouse Bladder Wall Injection

Mouse bladder wall injection is a useful technique to orthotopically study bladder phenomena, including stem cell, smooth muscle, and cancer biology. Before starting injections, the surgical area must be cleaned with soap and water and antiseptic solution. Surgical equipment must be sterilized before use and between each animal. Each mouse is placed under inhaled isoflurane anesthesia (2-5% for induction, 1-3% for maintenance) and its bladder exposed by making a midline abdominal incision with scissors. If the bladder is full, it is partially decompressed by gentle squeezing between two fingers. The cell suspension of interest is intramurally injected into the wall of the bladder dome using a 29 or 30 gauge needle and 1 cc or smaller syringe. The wound is then closed using wound clips and the mouse allowed to recover on a warming pad. Bladder wall injection is a delicate microsurgical technique that can be mastered with practice.

Mouse bladder wall injection is a useful approach to orthotopically study bladder stem cell and cancer biology. This delicate microsurgical method can be mastered with careful technique and practice.

マウスの膀胱壁インジェクション

Mouse bladder wall injection is a useful technique to orthotopically study bladder phenomena, including stem cell, smooth muscle, and cancer biology. ...

医学

Magnetic Resonance Imaging Assessment of Carcinogen-induced Murine Bladder Tumors

Murine bladder tumor models are critical for the evaluation of new therapeutic options. Bladder tumors induced with the N-butyl-N-(4-hydroxybutyl) nitrosamine (BBN) carcinogen are advantageous over cell line-based models because they closely replicate the genomic profiles of human tumors, and, unlike cell models and xenografts, they provide a good opportunity for the study of immunotherapies. However, bladder tumor generation is heterogeneous; therefore, an accurate assessment of tumor burden is needed before randomization to experimental treatment. Described here is a BBN mouse model and protocol to evaluate bladder cancer tumor burden in vivo using a fast and reliable magnetic resonance (MR) sequence (true FISP). This method is simple and reliable because, unlike ultrasound, MR is operator-independent and allows for the straightforward post-acquisition image processing and review. Using axial images of the bladder, analysis of regions of interest along the bladder wall and tumor allow for the calculation of bladder wall and tumor area. This measurement correlates with ex vivo bladder weight (rs= 0.37, p = 0.009) and tumor stage (p = 0.0003). In conclusion, BBN generates heterogeneous tumors that are ideal for evaluation of immunotherapies, and MRI can quickly and reliably assess tumor burden prior to randomization to experimental treatment arms.

Murine bladder tumors are induced with the N-butyl-N-(4-hydroxybutyl) nitrosamine carcinogen (BBN). Bladder tumor generation is heterogeneous; therefore, an accurate assessment of tumor burden is needed before randomization to experimental treatment. Here we present a fast, reliable MRI protocol to assess tumor size and stage.

核磁気共鳴化学発癌剤誘発マウス膀胱腫瘍の評価

Murine bladder tumor models are critical for the evaluation of new therapeutic options. Bladder tumors induced with the N-butyl-N-(4-hydroxybutyl) ...

An Orthotopic Bladder Tumor Model and the Evaluation of Intravesical saRNA Treatment

We present a novel method for treating bladder cancer with intravesically delivered small activating RNA (saRNA) in an orthotopic xenograft mouse bladder tumor model. The mouse model is established by urethral catheterization under inhaled general anesthetic. Chemical burn is then introduced to the bladder mucosa using intravesical silver nitrate solution to disrupt the bladder glycosaminoglycan layer and allows cells to attach. Following several washes with sterile water, human bladder cancer KU-7-luc2-GFP cells are instilled through the catheter into the bladder to dwell for 2 hours. Subsequent growth of bladder tumors is confirmed and monitored by in vivo bladder ultrasound and bioluminescent imaging. The tumors are then treated intravesically with saRNA formulated in lipid nanoparticles (LNPs). Tumor growth is monitored with ultrasound and bioluminescence. All steps of this procedure are demonstrated in the accompanying video.

Establishing an orthotopic bladder tumor model to evaluate antitumor effects of intravesically delivered saRNA and monitoring tumor growth by ultrasound and bioluminescent imaging.

同所性膀胱腫瘍モデルと膀胱内Sarnaの治療の評価

We present a novel method for treating bladder cancer with intravesically delivered small activating RNA (saRNA) in an orthotopic xenograft mouse bladder ...

An Orthotopic Bladder Cancer Model for Gene Delivery Studies

Bladder cancer is the second most common cancer of the urogenital tract and novel therapeutic approaches that can reduce recurrence and progression are needed. The tumor microenvironment can significantly influence tumor development and therapy response. It is therefore often desirable to grow tumor cells in the organ from which they originated. This protocol describes an orthotopic model of bladder cancer, in which MB49 murine bladder carcinoma cells are instilled into the bladder via catheterization. Successful tumor cell implantation in this model requires disruption of the protective glycosaminoglycan layer, which can be accomplished by physical or chemical means. In our protocol the bladder is treated with trypsin prior to cell instillation. Catheterization of the bladder can also be used to deliver therapeutics once the tumors are established. This protocol describes the delivery of an adenoviral construct that expresses a luciferase reporter gene. While our protocol has been optimized for short-term studies and focuses on gene delivery, the methodology of mouse bladder catheterization has broad applications.

Implantation of cancer cells into the organ of origin can serve as a useful preclinical model to evaluate novel therapies. MB49 bladder carcinoma cells can be grown within the bladder following intravesical instillation. This protocol demonstrates catheterization of the mouse bladder for the purpose of tumor implantation and adenoviral delivery.

遺伝子送達研究のための同所膀胱癌モデル

Bladder cancer is the second most common cancer of the urogenital tract and novel therapeutic approaches that can reduce recurrence and progression are ...

Evaluation of the In vivo Antitumor Activity of Polyanhydride IL-1&#945; Nanoparticles

Cytokine therapy is a promising immunotherapeutic strategy that can produce robust antitumor immune responses in cancer patients. The proinflammatory cytokine interleukin-1 alpha (IL-1&#945;) has been evaluated as an anticancer agent in several preclinical and clinical studies. However, dose-limiting toxicities, including flu-like symptoms and hypotension, have dampened the enthusiasm for this therapeutic strategy. Polyanhydride nanoparticle (NP)-based delivery of IL-1&#945; would represent an effective approach in this context since this may allow for a slow and controlled release of IL-1&#945; systemically while reducing toxic side effects. Here an analysis of the antitumor activity of IL-1&#945;-loaded polyanhydride NPs in a head and neck squamous cell carcinoma (HNSCC) syngeneic mouse model is described. Murine oropharyngeal epithelial cells stably expressing HPV16 E6/E7 together with hRAS and luciferase (mEERL) cells were injected subcutaneously into the right flank of C57BL/6J mice. Once tumors reached 3-4 mm in any direction, a 1.5% IL-1a - loaded 20:80 1,8-bis(p-carboxyphenoxy)-3,6-dioxaoctane:1,6-bis(p-carboxyphenoxy)hexane (CPTEG: CPH) nanoparticle (IL-1&#945;-NP) formulation was administered to mice intraperitoneally. Tumor size and body weight were continuously measured until tumor size or weight loss reached euthanasia criteria. Blood samples were taken to evaluate antitumor immune responses by submandibular venipuncture, and inflammatory cytokines were measured through cytokine multiplex assays. Tumor and inguinal lymph nodes were resected and homogenized into a single-cell suspension to analyze various immune cells through multicolor flow cytometry. These standard methods will allow investigators to study the antitumor immune response and potential mechanism of immunostimulatory NPs and other immunotherapy agents for cancer treatment.

Evaluation of the In vivo Antitumor Activity of Polyanhydride IL-1&#945; Nanoparticles

A standard protocol is described to study the antitumor activity and associated toxicity of IL-1&#945; in a syngeneic mouse model of HNSCC.

ポリ無水物IL-1αナノ粒子の 生体内 抗腫瘍活性の評価

Cytokine therapy is a promising immunotherapeutic strategy that can produce robust antitumor immune responses in cancer patients. The proinflammatory ...

Induction of Invasive Transitional Cell Bladder Carcinoma in Immune Intact Human MUC1 Transgenic Mice:  A Model for Immunotherapy Development

A preclinical model of invasive bladder cancer was developed in human mucin 1 (MUC1) transgenic (MUC1.Tg) mice for the purpose of evaluating immunotherapy and/or cytotoxic chemotherapy. To induce bladder cancer, C57BL/6 mice (MUC1.Tg and wild type) were treated orally with the carcinogen N-butyl-N-(4-hydroxybutyl)nitrosamine (OH-BBN) at 3.0 mg/day, 5 days/week for 12 weeks. To assess the effects of OH-BBN on serum cytokine profile during tumor development, whole blood was collected via submandibular bleeds prior to treatment and every four weeks. In addition, a MUC1-targeted peptide vaccine and placebo were administered to groups of mice weekly for eight weeks. Multiplex fluorometric microbead immunoanalyses of serum cytokines during tumor development and following vaccination were performed. At termination, interferon gamma (IFN-&#947;)/interleukin-4 (IL-4) ELISpot analysis for MUC1 specific T-cell immune response and histopathological evaluations of tumor type and grade were performed. The results showed that: (1) the incidence of bladder cancer in both MUC1.Tg and wild type mice was 67%; (2) transitional cell carcinomas (TCC) developed at a 2:1 ratio compared to squamous cell carcinomas (SCC); (3) inflammatory cytokines increased with time during tumor development; and (4) administration of the peptide vaccine induces a Th1-polarized serum cytokine profile and a MUC1 specific T-cell response. All tumors in MUC1.Tg mice were positive for MUC1 expression, and half of all tumors in MUC1.Tg and wild type mice were invasive. In conclusion, using a team approach through the coordination of the efforts of pharmacologists, immunologists, pathologists and molecular biologists, we have developed an immune intact transgenic mouse model of bladder cancer that expresses hMUC1.

An N-butyl-N-(4-hydroxybutyl)nitrosamine-induced bladder cancer model was developed in human mucin 1 (MUC1) transgenic mice for the purpose of testing MUC1-directed immunotherapy. After administering a MUC1-targeted peptide vaccine, a cytotoxic T lymphocyte response to MUC1 was confirmed by measuring serum cytokine levels and T-cell specific activity.

免疫無傷のヒトMUC1トランスジェニックマウスにおける侵襲移行細胞膀胱癌の誘導：免疫療法の開発のためのモデル

A preclinical model of invasive bladder cancer was developed in human mucin 1 (MUC1) transgenic (MUC1.Tg) mice for the purpose of evaluating immunotherapy ...

One-step Negative Chromatographic Purification of Helicobacter pylori Neutrophil-activating Protein Overexpressed in Escherichia coli in Batch Mode

Helicobacter pylori neutrophil-activating protein (HP-NAP) is a major virulence factor of Helicobacter pylori (H. pylori). It plays a critical role in H. pylori-induced gastric inflammation by activating several innate leukocytes including neutrophils, monocytes, and mast cells. The immunogenic and immunomodulatory properties of HP-NAP make it a potential diagnostic and vaccine candidate for H. pylori and a new drug candidate for cancer therapy. In order to obtain substantial quantities of purified HP-NAP used for its clinical applications, an efficient method to purify this protein with high yield and purity needs to be established.
In this protocol, we have described a method for one-step negative chromatographic purification of recombinant HP-NAP overexpressed in Escherichia coli (E. coli) by using diethylaminoethyl (DEAE) ion-exchange resins (e.g., Sephadex) in batch mode. Recombinant HP-NAP constitutes nearly 70% of the total protein in E. coli and is almost fully recovered in the soluble fraction upon cell lysis at pH 9.0. Under the optimal condition at pH 8.0, the majority of HP-NAP is recovered in the unbound fraction while the endogenous proteins from E. coli are efficiently removed by the resin.
This purification method using negative mode batch chromatography with DEAE ion-exchange resins yields functional HP-NAP from E. coli in its native form with high yield and purity. The purified HP-NAP could be further utilized for the prevention, treatment, and prognosis of H. pylori-associated diseases as well as cancer therapy.

One-step Negative Chromatographic Purification of Helicobacter pylori Neutrophil-activating Protein Overexpressed in Escherichia coli in Batch Mode

A high yield method for one-step negative purification of recombinant Helicobacter pylori neutrophil-activating protein (HP-NAP) overexpressed in Escherichia coli by using diethylaminoethyl resins in batch mode is described. HP-NAP purified by this method is beneficial for the development of vaccines, drugs, or diagnostics for H. pylori-associated diseases.

ワンステップの負のクロマトグラフィー精製<em&gt;ヘリコバクター・ピロリ</emで過剰発現&gt;好中球活性化タンパク質<em&gt;エシェリヒア・コリ</em&gt;バッチモードでの

Helicobacter pylori neutrophil-activating protein (HP-NAP) is a major virulence factor of Helicobacter pylori (H. pylori). It plays a critical role in H. ...

免疫・感染学

Establishing a Murine Superficial Bladder Cancer Model via an Intravesical Cell Administration Technique

This study presents an innovative method for establishing an orthotopic murine bladder tumor model with high efficiency and precise tumor localization. After anesthetizing female C57BL/6J mice in a supine position, a 24 G intravenous needle is inserted into the bladder to evacuate its contents. A 34 G dispensing needle is then introduced through the catheter, rotated five times to create a focal injury to the bladder dome mucosa, and subsequently removed. The MB49 cell suspension is aspirated and connected to a 30 G dispensing needle, which is inserted into the bladder via the catheter. Tumor cells are injected submucosally into the bladder under pressure. This technique results in minimal trauma to the mice, a high tumor take rate, and a fixed tumor location. It is characterized by simplicity and excellent reproducibility. This model provides an ideal experimental platform for developing intravesical therapies for bladder cancer, facilitating the advancement and optimization of treatment strategies for this malignancy.

This protocol describes a unique method for constructing an orthotopic model of superficial bladder cancer.

膀胱内細胞投与技術 による マウス表在性膀胱癌モデルの確立

This study presents an innovative method for establishing an orthotopic murine bladder tumor model with high efficiency and precise tumor localization. ...

Mouse Models Of Helicobacter Infection And Gastric Pathologies

Helicobacter pylori is a gastric pathogen that is present in half of the global population and is a significant cause of morbidity and mortality in humans. Several mouse models of gastric Helicobacter infection have been developed to study the molecular and cellular mechanisms whereby H. pylori bacteria colonize the stomach of human hosts and cause disease. Herein, we describe protocols to: 1) prepare bacterial suspensions for the in vivo infection of mice via intragastric gavage; 2) determine bacterial colonization levels in mouse gastric tissues, by polymerase chain reaction (PCR) and viable counting; and 3) assess pathological changes, by histology. To establish Helicobacter infection in mice, specific pathogen-free (SPF) animals are first inoculated with suspensions (containing &#8805;105 colony-forming units, CFUs) of mouse-colonizing strains of either Helicobacter pylori or other gastric Helicobacter spp. from animals, such as Helicobacter felis. At the appropriate time-points post-infection, stomachs are excised and dissected sagittally into two equal tissue fragments, each comprising the antrum and body regions. One of these fragments is then used for either viable counting or DNA extraction, while the other is subjected to histological processing. Bacterial colonization and histopathological changes in the stomach may be assessed routinely in gastric tissue sections stained with Warthin-Starry, Giemsa or Haematoxylin and Eosin (H&#38;E) stains, as appropriate. Additional immunological analyses may also be undertaken by immunohistochemistry or immunofluorescence on mouse gastric tissue sections. The protocols described below are specifically designed to enable the assessment in mice of gastric pathologies resembling those in human-related H. pylori diseases, including inflammation, gland atrophy and lymphoid follicle formation. The inoculum preparation and intragastric gavage protocols may also be adapted to study the pathogenesis of other enteric human pathogens that colonize mice, such as Salmonella Typhimurium or Citrobacter rodentium.

Mouse Models Of Helicobacter Infection And Gastric Pathologies

Mice represent an invaluable in vivo model to study infection and diseases caused by gastrointestinal microorganisms. Here, we describe the methods used to study bacterial colonization and histopathological changes in mouse models of Helicobacter pylori-related disease.

ヘリコバクター ・ ピロリ感染と胃の病理のマウス ・ モデル

Helicobacter pylori is a gastric pathogen that is present in half of the global population and is a significant cause of morbidity and mortality in ...

の有効性の評価

要約

さらに動画を探す

この動画の章

マウス同所性膀胱腫瘍モデルおよび腫瘍検出システム

マウスの膀胱壁インジェクション

核磁気共鳴化学発癌剤誘発マウス膀胱腫瘍の評価

同所性膀胱腫瘍モデルと膀胱内Sarnaの治療の評価

遺伝子送達研究のための同所膀胱癌モデル

ポリ無水物IL-1αナノ粒子の生体内抗腫瘍活性の評価

免疫無傷のヒトMUC1トランスジェニックマウスにおける侵襲移行細胞膀胱癌の誘導：免疫療法の開発のためのモデル

ワンステップの負のクロマトグラフィー精製

膀胱内細胞投与技術によるマウス表在性膀胱癌モデルの確立

ヘリコバクター・ピロリ感染と胃の病理のマウス・モデル

の有効性の評価

要約

さらに動画を探す

この動画の章

マウス同所性膀胱腫瘍モデルおよび腫瘍検出システム

マウスの膀胱壁インジェクション

核磁気共鳴化学発癌剤誘発マウス膀胱腫瘍の評価

同所性膀胱腫瘍モデルと膀胱内Sarnaの治療の評価

遺伝子送達研究のための同所膀胱癌モデル

ポリ無水物IL-1αナノ粒子の 生体内 抗腫瘍活性の評価

免疫無傷のヒトMUC1トランスジェニックマウスにおける侵襲移行細胞膀胱癌の誘導：免疫療法の開発のためのモデル

ワンステップの負のクロマトグラフィー精製

膀胱内細胞投与技術 による マウス表在性膀胱癌モデルの確立

ヘリコバクター ・ ピロリ感染と胃の病理のマウス ・ モデル

ポリ無水物IL-1αナノ粒子の生体内抗腫瘍活性の評価

膀胱内細胞投与技術によるマウス表在性膀胱癌モデルの確立

ヘリコバクター・ピロリ感染と胃の病理のマウス・モデル