This work was supported by EU Marie Curie Fellowship (EU/300686-InfO) to S.B. and a Research Prize from the United European Gastroenterology Foundation to H.C. We would like to thank Harry Begthel, Jeroen Korving and the Hubrecht Imaging Center for technical assistance, Meritxell Huch for help with initial organoid culture and Yana Zavros for discussion.

<ol>
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Hans Clevers is an inventor on several patents for organoid culture. Otherwise the authors have nothing to disclose.

This protocol describes the use of ever-expanding, untransformed primary organoids from adult stem cells for infection biology. Critical steps are i) the isolation of viable glands, ii) expansion of organoids and iii) the microinjection. Below are some suggestions for modifications, troubleshooting and technical considerations. 
Compared to other isolation methods, which use vigorous shaking or pipetting to release glands and can be equally successful, the technique presented here has the adva...

病原体の研究は、in vivoでの感染を模倣するための適切なモデル系に依存しています。使用されるシステムの一部が最適ほど遠いながらいくつかの感染症剤は、適切なモデル系が不足しています。一例としては、胃がんの発症に因果関係である胃の細菌ヘリコバクター・ピロリ （ ピロリ菌 ）、です。まだ癌カスケードの終点を表す癌発生用癌細胞株の根底にある分子メカニズムを分析することを目指して、より適切な細胞培養系の非存在下で、多くの研究。プライマリ、非形質転換細胞は、これらの研究のための優れたモデルとなります。しかし、初代細胞は、ドナーの数が少ないからのみ利用可能であり、より長い期間にわたって培養することができません。近年では、幹細胞研究は、感染生物学の研究のための主要な細胞培養のための新しいソースを提供するために重要な進歩を遂げました。 からの文化3幹細胞源が使用されている：胚性幹細胞（ESC）、人工多能性幹細胞（iPS細胞）または成体幹細胞。このような熱帯熱マラリア原虫 8またはトキソプラズマ原虫 9と7、寄生虫、およびそのようなバクテリオテタイオタオミクロン 10またはサルモネラ菌 11などの細菌、 -彼らは、このようなサイトメガロウイルス1,2またはC型肝炎ウイルスなどのウイルス、3の感染をモデル化するために使用されてきました。最近では、いくつかのアプローチがHで感染をモデル化するために公開されています15 - ESCまたはのiPS細胞12由来オルガノイド、マウスの成体幹細胞21,22またはヒト成体幹細胞13とピロリ菌 。 成体幹細胞からオルガノイド培養物の開発は、マウスの腸上皮から単離された単一の幹細胞が3次元マトリックスに播種された研究に由来すると骨形態形成タンパク質（BMP）16シグナリングを阻害するためにWntシグナル伝達とノギンを高めるためにマイトジェン、RスポンジンのようにEGFを含有する腸の幹細胞の環境を模倣媒体に埋め込 ​​まれました。特にこれらの培養物は、間葉系細胞との共培養を必要としません。これらの条件下では、幹細胞は増殖し、ドメインは腸陰窩細胞、および腸絨毛の細胞を含むドメインを保有して小さな構造を形成します。オルガノイドは、このようにin vivoでの状況を模倣するために、自己組織化。今日、多くのネズミと人間的な組織から成体幹細胞を in vitroで増殖させることができ、そのような小腸および結腸17、胃13,18、肝臓19,20、膵臓21と、それらのin vivoでの対応を、似ているオルガノイドに自己組織化前立腺22。 ここでは、成体幹CELから培養マウスまたはヒトの胃オルガノイドのビデオプロトコルを提供LSはHでそれらを顕微注入すると、 ピロリ菌 。このプロトコルは、以前の報告13,18に基づいています。この方法は、腸のオルガノイドのような他のオルガノイド培養を培養し、感染のために適合させることができます。

<table border="0">
	<tbody>
		<tr>
			<td>Medium</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>HEPES</td>
			<td>Invitrogen</td>
			<td>15630-056</td>
			<td></td>
		</tr>
		<tr>
			<td>Advanced DMEM/F12</td>
			<td>Invitrogen</td>
			<td>12634-028</td>
			<td></td>
		</tr>
		<tr>
			<td>Matrigel, GFR, phenol free</td>
			<td>BD</td>
			<td>356231</td>
			<td></td>
		</tr>
		<tr>
			<td>GlutaMAX</td>
			<td>Invitrogen</td>
			<td>35050-079</td>
			<td>Stock concentration 200 mM, final concentration 2 mM</td>
		</tr>
		<tr>
			<td>B27</td>
			<td>Invitrogen</td>
			<td>17504-044</td>
			<td>Stock concentration 50 x, final concentration 1x</td>
		</tr>
		<tr>
			<td>N-Acetylcysteine</td>
			<td>Sigma-Aldrich</td>
			<td>A9165-5G</td>
			<td>Stock concentration 500 mM, final concentration 1 mM</td>
		</tr>
		<tr>
			<td>Murine recombinant EGF</td>
			<td>Invitrogen</td>
			<td>PMG8043</td>
			<td>Stock concentration 500 &#181;g/mL, final concentration 50 ng/mL</td>
		</tr>
		<tr>
			<td>Human recombinant FGF10</td>
			<td>Peprotech</td>
			<td>100-26</td>
			<td>Stock concentration 100 &#181;g/mL, final concentration 200 ng/mL</td>
		</tr>
		<tr>
			<td>TGF&#946;i A-83-01</td>
			<td>Tocris</td>
			<td>2939</td>
			<td>Stock concentration 500 &#181;M, final concentration 2 &#181;M&#160;</td>
		</tr>
		<tr>
			<td>Nicotinamide</td>
			<td>Sigma-Aldrich</td>
			<td>N0636</td>
			<td>Stock concentration 1 M, final concentration 10 mM&#160;</td>
		</tr>
		<tr>
			<td>[Leu15]-Gastrin</td>
			<td>Sigma-Aldrich</td>
			<td>G9145</td>
			<td>Stock concentration 100 &#181;M, final concentration 1 nM</td>
		</tr>
		<tr>
			<td>RHOKi Y-27632</td>
			<td>Sigma-Aldrich</td>
			<td>Y0503</td>
			<td>Stock concentration 10 mM, final concentration 10 &#181;M</td>
		</tr>
		<tr>
			<td>Wnt3A conditioned medium</td>
			<td></td>
			<td></td>
			<td>Stable cell line generated in the Clevers Lab. Final concentration 50%. Cells can be obtained from Hans Clevers.</td>
		</tr>
		<tr>
			<td>R-spondin1 conditioned medium</td>
			<td></td>
			<td></td>
			<td>Stable cell line generated in the Kuo Lab. Final concentration 10%. Cell line can be obtained from Calvin Kuo, Stanford.</td>
		</tr>
		<tr>
			<td>Noggin conditioned medium</td>
			<td></td>
			<td></td>
			<td>Stable cell line generated in the Clevers Lab. Final concentration 10%. Cells can be obtained from Hans Clevers.</td>
		</tr>
		<tr>
			<td>R-spondin3</td>
			<td>R&#38;D</td>
			<td>3500-RS/CF</td>
			<td>Alternative source for R-spondin. This has been tested on human intestine organoids (1 &#181;g/mL), but not yet on gastric organoids.</td>
		</tr>
		<tr>
			<td>Noggin</td>
			<td>Peprotech</td>
			<td>120-10</td>
			<td>Alternative source for noggin. This has been tested on human intestine organoids (100 ng/mL), but not yet on gastric organoids.</td>
		</tr>
		<tr>
			<td>TrypLE express</td>
			<td>Life Technologies</td>
			<td>12605036</td>
			<td>Enzymatic dissociation solution&#160;</td>
		</tr>
		<tr>
			<td>CoolCell&#174; Alcohol-Free Cell Freezing Containers</td>
			<td>biocision</td>
			<td>BCS-405</td>
			<td></td>
		</tr>
		<tr>
			<td>Recovery Cell Culture Freezing Medium</td>
			<td>Invitrogen</td>
			<td>12648-010</td>
			<td></td>
		</tr>
		<tr>
			<td>Antibiotics</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Primocin</td>
			<td>Invivogen</td>
			<td>ant-pm-1</td>
			<td>An antibiotics composition agains bacteria and fungi. It is helpful after initiation of a culture. For long term culture you can switch to other antibiotics or none.</td>
		</tr>
		<tr>
			<td>Penicillin/Streptomycin</td>
			<td>Invitrogen</td>
			<td>15140-122</td>
			<td>Stock concentration 10000/10000 U/mL, final concentration 100/100 U/mL. Can be used alternatively to Primocin in long term culture.</td>
		</tr>
		<tr>
			<td>Other</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Tweezers</td>
			<td>Neolabs</td>
			<td>2-1033</td>
			<td>Tweezers with fine tips are helpful for the removal of muscle layer from the tissue.</td>
		</tr>
		<tr>
			<td>4 Well Multidishes</td>
			<td>Thermo Scientific</td>
			<td>144444</td>
			<td>You can use other Multidishes. These were particularly helpful for microinjections because they have a low outer rim and allow more mobility for the manipulator.</td>
		</tr>
		<tr>
			<td>Micromanipulator</td>
			<td>Narishige</td>
			<td>M-152</td>
			<td></td>
		</tr>
		<tr>
			<td>Microinjector</td>
			<td>Narishige</td>
			<td>IM-5B</td>
			<td></td>
		</tr>
		<tr>
			<td>Stereomicroscope</td>
			<td>Leica</td>
			<td>MZ75</td>
			<td></td>
		</tr>
		<tr>
			<td>Workbench</td>
			<td>Clean Air</td>
			<td></td>
			<td>Custom made to fit the stereomicroscope in ML2 condition</td>
		</tr>
		<tr>
			<td>Cappillaries</td>
			<td>Harvard Apparatus</td>
			<td>GC100T-10</td>
			<td>1 mm outer diameter, 0,78 mm inner diameter.</td>
		</tr>
		<tr>
			<td>Micropipette Puller</td>
			<td>Sutter Instruments</td>
			<td>Flaming Brown Micropipette Puller</td>
			<td></td>
		</tr>
		<tr>
			<td>anti Cag A antibody</td>
			<td>Santa Cruz</td>
			<td>sc-25766</td>
			<td></td>
		</tr>
	</tbody>
</table>

organoids as model for infectious diseases: culture of human and murine stomach organoids and microinjection of helicobacter pylori

Recently infection biologists have employed stem cell derived cultures to answer the need for new and better models to study host-pathogen interactions. Three cellular sources have been used: Embryonic stem cells (ESC), induced pluripotent stem cells (iPSC) or adult stem cells. Here, culture of mouse and human gastric organoids derived from adult stem cells is described and used for infection with the gastric pathogen Helicobacter pylori. Human gastric glands are isolated from resection material, seeded in a basement matrix and embedded in medium containing growth factors epidermal growth factor (EGF), R-spondin, Noggin, Wnt, fibroblast growth factor (FGF) 10, gastrin and transforming growth factor (TGF) beta inhibitor. In these conditions, gastric glands grow into 3-dimensional organoids containing 4 lineages of the stomach. The organoids expand indefinitely and can be frozen and thawed similarly as cell lines. For infection studies, bacteria are microinjected into the lumen of the organoids. Infected organoids are processed for imaging. The described methods can be adapted to other organoids and infections with other bacteria, viruses or parasites. This allows the study of infection-induced changes in primary cells.

このプロトコルは、胃腺（ 図2）の単離を可能にします。腺は、腺はオルガノイド（ 図3）に成長できるように、ラミニンおよびコラーゲンが豊富な3次元フレームワークを提供し、ウェル内ドロップとして固化地下行列、中に播種されています。オルガノイドは、典型的には、小さな嚢胞を開始し、12〜16日以内に、彼らは50〜300ミクロン（ 図4）の直径を...

Watch this Scientific Journal Video about Organoids as Model for Infectious Diseases: Culture of Human and Murine Stomach Organoids and Microinjection of Helicobacter Pylori at JoVE.com

Organoids as Model for Infectious Diseases: Culture of Human and Murine Stomach Organoids and Microinjection of Helicobacter Pylori

Stem cell derived cultures harbor tremendous potential to model infectious diseases. Here, the culture of mouse and human gastric organoids derived from adult stem cells is described. The organoids are microinjected with the gastric pathogen Helicobacter pylori.

感染症のためのモデルとしてのオルガノイド：人間の文化とマウス胃オルガノイドとピロリ菌のマイクロインジェクション

Recently infection biologists have employed stem cell derived cultures to answer the need for new and better models to study host-pathogen interactions. ...

organoids-as-model-for-infectious-diseases-culture-human-murine

Research

JoVE Journal

Immunology and Infection

34.9K ビュー.  University Medical Centre Utrecht. Stem cell derived cultures harbor tremendous potential to model infectious diseases. Here, the culture of mouse and human gastric organoids derived from adult stem cells is described. The organoids are microinjected with the gastric pathogen Helicobacter pylori.

ビデオ: Organoids as Model for Infectious Diseases: Culture of Human and Murine Stomach Organoids and Microinjection of Helicobacter Pylori

Detection of Infectious Virus from Field-collected Mosquitoes by Vero Cell Culture Assay

Mosquitoes transmit a number of distinct viruses including important human pathogens such as West Nile virus, dengue virus, and chickungunya virus. Many of these viruses have intensified in their endemic ranges and expanded to new territories, necessitating effective surveillance and control programs to respond to these threats. One strategy to monitor virus activity involves collecting large numbers of mosquitoes from endemic sites and testing them for viral infection. In this article, we describe how to handle, process, and screen field-collected mosquitoes for infectious virus by Vero cell culture assay. Mosquitoes are sorted by trap location and species, and grouped into pools containing &le;50 individuals. Pooled specimens are homogenized in buffered saline using a mixer-mill and the aqueous phase is inoculated onto confluent Vero cell cultures (Clone E6). Cell cultures are monitored for cytopathic effect from days 3-7 post-inoculation and any viruses grown in cell culture are identified by the appropriate diagnostic assays. By utilizing this approach, we have isolated 9 different viruses from mosquitoes collected in Connecticut, USA, and among these, 5 are known to cause human disease. Three of these viruses (West Nile virus, Potosi virus, and La Crosse virus) represent new records for North America or the New England region since 1999. The ability to detect a wide diversity of viruses is critical to monitoring both established and newly emerging viruses in the mosquito population.

We describe a method to process and screen field-collected mosquitoes for a diversity of viruses by Vero cell culture assay. By employing this technique, we have detected 9 different viruses from 4 taxonomic families in mosquitoes collected in Connecticut.

Vero細胞培養アッセイによるフィールドコレクト蚊から感染性ウイルスの検出

Mosquitoes transmit a number of distinct viruses including important human pathogens such as West Nile virus, dengue virus, and chickungunya virus. Many ...

免疫・感染学

Rapid Identification of Gram Negative Bacteria from Blood Culture Broth Using MALDI-TOF Mass Spectrometry

An important role of the clinical microbiology laboratory is to provide rapid identification of bacteria causing bloodstream infection. Traditional identification requires the sub-culture of signaled blood culture broth with identification available only after colonies on solid agar have matured. MALDI-TOF MS is a reliable, rapid method for identification of the majority of clinically relevant bacteria when applied to colonies on solid media. The application of MALDI-TOF MS directly to blood culture broth is an attractive approach as it has potential to accelerate species identification of bacteria and improve clinical management. However, an important problem to overcome is the pre-analysis removal of interfering resins, proteins and hemoglobin&#160;contained in blood culture specimens which, if not removed, interfere with the MS spectra and can result in insufficient or low discrimination identification scores. In addition it is necessary to concentrate bacteria to develop spectra of sufficient quality. The presented method describes the concentration, purification, and extraction of Gram negative bacteria allowing for the early identification of bacteria from a signaled blood culture broth.

The application of matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry (MS) directly to blood culture broth expedites the identification of bacteria. The presented method is a rapid and reliable method for identification of Gram negative bacteria directly from blood culture broth.

MALDI-TOF質量分析法を使用した血液培養ブロスからのグラム陰性菌の迅速な同定

An important role of the clinical microbiology laboratory is to provide rapid identification of bacteria causing bloodstream infection. Traditional ...

High Resolution Electron Microscopy of the Helicobacter pylori Cag Type IV Secretion System Pili Produced in Varying Conditions of Iron Availability

Helicobacter pylori is a helical-shaped, gram negative bacterium that colonizes the human gastric niche of half of the human population1,2. H. pylori is the primary cause of gastric cancer, the second leading cause of cancer-related deaths worldwide3. One virulence factor that has been associated with increased risk of gastric disease is the Cag-pathogenicity island, a 40-kb region within the chromosome of H. pylori that encodes a type IV secretion system and the cognate effector molecule, CagA4,5. The Cag-T4SS is responsible for translocating CagA and peptidoglycan into host epithelial cells5,6. The activity of the Cag-T4SS results in numerous changes in host cell biology including upregulation of cytokine expression, activation of proinflammatory pathways, cytoskeletal remodeling, and induction of oncogenic cell-signaling networks5-8. The Cag-T4SS is a macromolecular machine comprised of sub-assembly components spanning the inner and outer membrane and extending outward from the cell into the extracellular space. The extracellular portion of the Cag-T4SS is referred to as the &#8220;pilus&#8221;5. Numerous studies have demonstrated that the Cag-T4SS pili are formed at the host-pathogen interface9,10. However, the environmental features that regulate the biogenesis of this important organelle remain largely obscure. Recently, we reported that conditions of low iron availability increased the Cag-T4SS activity and pilus biogenesis. Here we present an optimized protocol to grow H. pylori in varying conditions of iron availability prior to co-culture with human gastric epithelial cells. Further, we present the comprehensive protocol for visualization of the hyper-piliated phenotype exhibited in iron restricted conditions by high resolution scanning electron microscopy analyses.

High Resolution Electron Microscopy of the Helicobacter pylori Cag Type IV Secretion System Pili Produced in Varying Conditions of Iron Availability

Here we describe a method to visualize the oncogenic bacterial organelle known as the Cag Type IV Secretion System (Cag-T4SS). We find that the Cag-T4SS is differentially produced on the surface of H. pylori in response to varying conditions of iron availability.

の高分解能電子顕微鏡<em&gt;ヘリコバクター·ピロリ</em鉄の可用性の変化する条件で生産&gt; CAG IV型分泌系線毛

Helicobacter pylori is a helical-shaped, gram negative bacterium that colonizes the human gastric niche of half of the human population1,2.  H. pylori is ...

Isolation and Flow Cytometric Characterization of Murine Small Intestinal Lymphocytes

The intestines &#8212; which contain the largest number of immune cells of any organ in the body &#8212; are constantly exposed to foreign antigens, both microbial and dietary. Given an increasing understanding that these luminal antigens help shape the immune response and that education of immune cells within the intestine is critical for a number of systemic diseases, there has been increased interest in characterizing the intestinal immune system. However, many published protocols are arduous and time-consuming. We present here a simplified protocol for the isolation of lymphocytes from the small-intestinal lamina propria, intraepithelial layer, and Peyer&#39;s patches that is rapid, reproducible, and does not require laborious Percoll gradients. Although the protocol focuses on the small intestine, it is also suitable for analysis of the colon. Moreover, we highlight some aspects that may need additional optimization depending on the specific scientific question. This approach results in the isolation of large numbers of viable lymphocytes that can subsequently be used for flow cytometric analysis or alternate means of characterization.

There is growing interest in the quantitative characterization of intestinal lymphocytes owing to increasing recognition that these cells play a critical role in a variety of intestinal and systemic diseases. In this protocol, we describe how to isolate single cell populations from different small-intestinal compartments for subsequent flow cytometric characterization.

マウスの小腸リンパ球の単離およびフローサイトメトリーキャラクタリゼーション

The intestines &#8212; which contain the largest number of immune cells of any organ in the body &#8212; are constantly exposed to foreign antigens, both ...

The Madagascar Hissing Cockroach as an Alternative Non-mammalian Animal Model to Investigate Virulence, Pathogenesis, and Drug Efficacy

Many aspects of innate immunity are conserved between mammals and insects. An insect, the Madagascar hissing cockroach from the genus Gromphadorhina, can be utilized as an alternative animal model for the study of virulence, host-pathogen interaction, innate immune response, and drug efficacy. Details for the rearing, care and breeding of the hissing cockroach are provided. We also illustrate how it can be infected with bacteria such as the intracellular pathogens Burkholderia mallei, B. pseudomallei, and B. thailandensis. Use of the hissing cockroach is inexpensive and overcomes regulatory issues dealing with the use of mammals in research. In addition, results found using the hissing cockroach model are reproducible and similar to those obtained using mammalian models. Thus, the Madagascar hissing cockroach represents an attractive surrogate host that should be explored when conducting animal studies.

We present a protocol to utilize the Madagascar hissing cockroach as an alternative non-mammalian animal model to conduct bacterial virulence, pathogenesis, drug toxicity, drug efficacy, and innate immune response studies.

病原性、病態、および薬の有効性を調査するため、代替の非哺乳類動物モデルとしてゴキブリをヒス マダガスカル

Many aspects of innate immunity are conserved between mammals and insects. An insect, the Madagascar hissing cockroach from the genus Gromphadorhina, can ...

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 ...

Preparation of Murine Submandibular Salivary Gland for Upright Intravital Microscopy

The submandibular salivary gland (SMG) is one of the three major salivary glands, and is of interest for many different fields of biological research, including cell biology, oncology, dentistry, and immunology. The SMG is an exocrine gland comprised of secretory epithelial cells, myofibroblasts, endothelial cells, nerves, and extracellular matrix. Dynamic cellular processes in the rat and mouse SMG have previously been imaged, mostly using inverted multi-photon microscope systems. Here, we describe a straightforward protocol for the surgical preparation and stabilization of the murine SMG in anesthetized mice for in vivo imaging with upright multi-photon microscope systems. We present representative intravital image sets of endogenous and adoptively transferred fluorescent cells, including the labeling of blood vessels or salivary ducts and second harmonic generation to visualize fibrillar collagen. In sum, our protocol allows for surgical preparation of mouse salivary glands in upright microscopy systems, which are commonly used for intravital imaging in the field of immunology.

We describe a protocol to surgically expose and stabilize the murine submandibular salivary gland for intravital imaging using upright intravital microscopy. This protocol is easily adaptable to other exocrine glands of the head and neck region of mice and other small rodents.

マウス顎下腺唾液腺の直立した生体顕微鏡検査のための準備

The submandibular salivary gland (SMG) is one of the three major salivary glands, and is of interest for many different fields of biological research, ...

Identification of Mouse and Human Antibody Repertoires by Next-Generation Sequencing

The immense adaptability of antigen recognition by antibodies is the basis of the acquired immune system. Despite our understanding of the molecular mechanisms underlying the production of the vast repertoire of antibodies by the acquired immune systems, it has not yet been possible to arrive at a global view of a complete antibody repertoire. In particular, B cell repertoires have been regarded as a black box because of their astronomical number of antibody clones. However, next-generation sequencing technologies are enabling breakthroughs to increase our understanding of the B cell repertoire. In this report, we describe a simple and efficient method to visualize and analyze whole individual mouse and human antibody repertoires. From the immune organs, representatively from spleen in mice and peripheral blood mononuclear cells in humans, total RNA was prepared, reverse transcribed, and amplified using the 5&#39;-RACE method. Using a universal forward primer and antisense primers for the antibody class-specific constant domains, antibody mRNAs were uniformly amplified in proportions reflecting their frequencies in the antibody populations. The amplicons were sequenced by next-generation sequencing (NGS), yielding more than 105 antibody sequences per immunological sample. We describe the protocols for antibody sequence analyses including V(D)J-gene-segment annotation, a bird&#39;s-eye view of the antibody repertoire, and our computational methods.

Here, we describe protocols for the analysis and visualization of the structure and constitution of whole antibody repertoires. This involves the acquisition of vast sequences of antibody RNA using next-generation sequencing.

マウスと次世代シーケンサーによるひと抗体のレパートリーの同定

The immense adaptability of antigen recognition by antibodies is the basis of the acquired immune system. Despite our understanding of the molecular ...

Isolation of Single Intracellular Bacterial Communities Generated from a Murine Model of Urinary Tract Infection for Downstream Single-cell Analysis

In this article, we outline a procedure used to isolate individual intracellular bacterial communities from a mouse that has been experimentally infected in the urinary tract. The protocol can be broadly divided into three sections: the infection, bladder epithelial cell harvesting, and mouth micropipetting to isolate individual infected epithelial cells. The isolated epithelial cell contains viable bacterial cells and is nearly free of contaminating extracellular bacteria, making it ideal for downstream single-cell analysis. The time taken from the start of infection to obtaining a single intracellular bacterial community is about 8 h. This protocol is inexpensive to deploy and uses widely available materials, and we anticipate that it can also be utilized in other infection models to isolate single infected cells from cell mixtures even if those infected cells are rare. However, due to a potential risk in mouth micropipetting, this procedure is not recommended for highly infectious agents.

This protocol describes a simple method of isolating single, infected-bladder epithelial cells from a murine model of urinary tract infection.

下流の単一細胞分析のため尿路感染症のマウスモデルから生成された単一細胞内細菌群集の分離

In this article, we outline a procedure used to isolate individual intracellular bacterial communities from a mouse that has been experimentally infected ...

Retrograde Parotid Gland Infusion through Stensen's Duct in a Non-Human Primate for Vectored Gene Delivery

Salivary glands are an attractive tissue target for gene therapy with promising results already leading to human trials. They are inherently capable of secreting proteins into the bloodstream and are easily accessible, making them potentially superior tissue sites for replacement hormone production or vaccination by gene transfer. Suggested methods for gene delivery include transcutaneous injection and retrograde infusion through salivary ducts. We demonstrate how to perform Retrograde Salivary Gland Infusion (RSGI) in non-human primates. We describe the important anatomic landmarks including identification of the parotid papilla, an atraumatic method of cannulating and sealing Stensen&#39;s Duct utilizing basic dental tools, polyethylene tubing, and cyanoacrylate, and the appropriate rate of infusion. While this is the least traumatic method of delivery, the method is still limited by the volume able to be delivered (&#60;0.5 mL) and the potential for trauma to the duct and gland. We demonstrate using fluoroscopy that an infusate can be fully delivered into the gland, and further demonstrate by immunohistochemistry the transduction of a typical vector and expression of the delivered gene.

Retrograde Parotid Gland Infusion through Stensen&#039;s Duct in a Non-Human Primate for Vectored Gene Delivery

Salivary glands have been proposed as a tissue target site for gene therapy, especially in the area of vaccination by gene transfer. We demonstrate gene delivery in a non-human primate model utilizing retrograde parotid infusion.

ベクター化遺伝子導入のための非ヒト霊長類におけるステンセンダクトによる逆行性耳下腺注入

Salivary glands are an attractive tissue target for gene therapy with promising results already leading to human trials. They are inherently capable of ...