作者感谢杰登史密斯严格审查和编辑校对的稿子。这项工作已获得支持，从国家多发性硬化症协会（NMSS，部分补助RG-4001-A1），意大利多发性硬化症协会（AISM，授予2010/R/31），意大利卫生部（GR08-7），翅膀生命，Banca银行阿格里科拉POPOLARE二拉古萨（BAPR），欧洲研究委员会（ERC）下的ERC-2010-STG赠款协定没有260511-SEM_SEM和欧洲共同体（欧共体）第七框架计划（FP7/2007-2013）根据赠款协议N *度; 280772 - 卓智。

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作者什么都没有透露。

成体干细胞的疗法正在成为最有希望的策略，用于治疗慢性炎性CNS疾病如MS2 11中的一个。同时维持其治疗作用的机制仍有待完全阐明，全国人大移植在神经退行性疾病的不同的实验模型的显著影响，已经引起了几分挑衅的信念，干细胞可能很快被应用到人类的研究。然而，设想我们需要面对的一些关键问题，并解决一些悬而未决的问题，如理想的干细胞来源的移植（自体与异体，?...

强有力的证据已经出现从体内研究，证明在中枢神经系统疾病1-8的动物模型中的体细胞的神经干/祖细胞（的NPC）的移植的治疗效果。不过，也有一些与干细胞输送到主机的问题需要仔细考虑之前，这些实验结果可以转化为临床应用。向的（非造血）恢复性干细胞疗法对于多灶性，慢性炎症性脑疾病的发展的一个特别重大的障碍是怪物注射的理想的路径的识别。目标疾病的病理生理学有相当的了解（焦或多灶性;主要炎症或退行性小学），以及与交付相关的技术可行性和风险问题谨慎的分析是在确定干细胞传递最优协议。 而焦点（ <em&gt;如。进入神经 ​​系统实质）造血干细胞移植是一种合理的方法为特征的破坏空间狭窄的区域中枢神经系统疾病的治疗（ 如帕金森氏症和亨廷顿氏病，脑和脊髓外伤和中风），同样的方法可以证明是几乎不可行的，如MS，其中多灶性，慢性的，空间上传播中枢神经系统损伤会随时间积累的条件。在后一种情况下，针对局灶性细胞注射到病变的个体，也阻碍了移植的NPC的能力有限迁移的中枢神经系统实质内长的距离，从而促使中枢神经系统的替代，更合适的方法识别与微创全国人大针对移植。 从小鼠的NPC针对颅内肿瘤（ 例如 ，神经胶质瘤）观测了很大的希望出现的CNS9外血管内注射时。根据这一开创性在干细胞pathotrophism 10的体内证据，大量的数据被积累有关实验性自身免疫性脑脊髓炎（EAE）的实验动物的可行性和NPC的全身移植的治疗功效，作为模型的炎性中枢神经系统损伤， 通过静脉内（iv）或侧脑室（ICV）全国人大注射1,2,5,6,8 ......我们首先证明，这是依赖于移植的NPC的能力为目标，进入中枢神经系统发炎，并随后参与多间在体内 11项具体的微环境中的通信程序。为了特异性靶向中枢神经系统，的NPC被直接输送到脑脊髓液（CSF）中通过侧脑室注射循环，或到通过静脉注射的血液。一旦进入无论是血液或脑脊液，移植的NPC积极互动血脑屏障（BBB）或血脑脊液（BCSFB）壁垒和进入CNS实质。这人大移植和血脑屏障（或BCSFB）之间的相互作用是通过特定的NPC表面细胞粘附分子（CAMS）的监管，并通过高水平的CAM反配体对活化的内皮/室管膜细胞12-14的表达提供便利。这些凸轮的例子包括受体，透明质酸，CD44和胞间粘附分子（ICAM）-1配体很迟抗原（VLA）-4 5,15,16（即，在白细胞，负责与活化室管膜的相互作用细胞和内皮细胞），并以一个低得多的程度淋巴细胞功能相关抗原（LFA）-1和P-选择素糖蛋白配体（PSGL）-1。的NPC也表达多种趋化因子受体，包括CCR1，CCR2，CCR5，CXCR3和CXCR4（但不表达CCR3和CCR7），它在功能上是积极的，无论是在体外和体内 5,16。因此，systemica莱注入的NPC用这些凸轮，以及G-蛋白偶联受体（GPCR的），积累在发炎的中枢神经系统的电平。相反，注入的NPC进入全身健康小鼠不通过血管或脑脊髓液空间的路由2进入中枢神经系统。中枢神经系统炎症，或内皮/室管膜细胞活化之后的全身细胞因子或lypopolisaccharide（LPS）注射作为化学诱导的脑炎的模型，因此，有必要对全身注射的NPC积累到大脑和脊髓2。因此，中枢神经系统的成功定位与全身治疗鼻咽癌是依赖于机会（胡）的一种疾病特定的窗口中，大脑和脊髓的环境，有利于积累和NPC的跨内皮迁移的鉴定。这种情况一般出现在急性和亚急性炎症17的范围内。一旦已经进入中枢神经系统，移植未分化的NPC已经显示出改善的小鼠的临床病理特征以及更大的，非人灵长类动物与EAE。这已被描述为依赖从最小的细胞替代2和内血管周围的CNS 2,5,6,18免疫调节和神经保护性旁分泌因子与非CNS发炎的区域19,20（ 例如淋巴结）显着分泌响应于炎性细胞信号引起了浸润的免疫细胞5。 在这里，我们描述成慢性EAE的小鼠模型的全身注射体细胞的NPC的关键方法问题。更具体地说，我们定义我们已经建立了以（i）本协议派生，扩展和移植体的NPC准备从成年C57BL / 6小鼠的脑室下区（SVZ）; （ⅱ）引起的慢性EAE在这种小鼠及（iii）进行治疗有效的全身性（ⅳ或ICV）怪物移植我NTO EAE小鼠。

<table border="0" cellpadding="0" cellspacing="0" width="1474">
	<colgroup>
		<col />
		<col />
		<col />
		<col />
	</colgroup>
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:753px;">Cell culture</td>
			<td style="width:300px;"></td>
			<td style="width:149px;"></td>
			<td style="width:272px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">EBSS</td>
			<td>Sigma</td>
			<td>E2888</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">L-Cystein</td>
			<td>SIGMA-ALDRICH CO LTD</td>
			<td>C7352</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Papain</td>
			<td>WORTHINGTON</td>
			<td>30H11965</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">EDTA</td>
			<td>Fisher scientific</td>
			<td>D/0700/50</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Mouse NeuroCult basal medium</td>
			<td>Stem Cell technologies</td>
			<td>05700</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">NeuroCult proliferation supplements</td>
			<td>Stem Cell technologies</td>
			<td>05701</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Heparin</td>
			<td>Sigma</td>
			<td>H3393</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Basic fibroblast growth factor</td>
			<td>Peprotech</td>
			<td>100-18B-1000</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Epidermal growth factor</td>
			<td>Peprotech</td>
			<td>AF-100-15-1000</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Pen/Strep</td>
			<td>Invitrogen</td>
			<td>1514012</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Matrigel (coating solution)</td>
			<td>BD biosciences</td>
			<td>354230</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">NeuroCult&#174; Differentiation Kit (Mouse)</td>
			<td>Stem cell technologies</td>
			<td>05704</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Accumax</td>
			<td>eBioscience</td>
			<td>00-4666-56</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Dulbecco&#39;s PBS (DPBS) (10x) without Ca&#38; Mg</td>
			<td>PAA LABORATORIES LTD</td>
			<td>H15-011</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Myco trace</td>
			<td>PAA LABORATORIES LTD</td>
			<td>Q052-020</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Dimethyl sulfoxide (DMSO)</td>
			<td>SIGMA</td>
			<td>D2650</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;"></td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">immunofluorescence</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Normal goat serum</td>
			<td>PAA LABORATORIES LTD</td>
			<td>B11-035</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether</td>
			<td>SIGMA-ALDRICH CO LTD</td>
			<td>T8787</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Mouse anti Nestin</td>
			<td>Abcam</td>
			<td>ab11306</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Rabbit anti GFAP</td>
			<td>DAKO</td>
			<td>203344</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Mouse anti Histone H3 (phospho S10)&#160;</td>
			<td>Abcam</td>
			<td>ab14955</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Rabbit anti MAP-2</td>
			<td>Abcam</td>
			<td>ab32454</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Rat anti MBP</td>
			<td>AbD SEROTEC</td>
			<td>MCA409S</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Anti-O4 Antibody, clone 81 | MAB345</td>
			<td>Millipore</td>
			<td>MAB345</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">DAPI</td>
			<td>Invitrogen</td>
			<td>D1306</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Mounting solution</td>
			<td>DAKO</td>
			<td>S3023</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;"></td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">EAE</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Freund&#39;s Adjuvant Incomplete</td>
			<td>SIGMA-ALDRICH CO LTD</td>
			<td>F5506</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Mycobacterium tuberculosis&#160;</td>
			<td>DIFCO</td>
			<td>H37Ra</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">MOG(35&#8211;55)&#160;</td>
			<td>Espikem</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Pertussis toxin</td>
			<td>List Biological Laboratories</td>
			<td>181</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;"></td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Tissue processing</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Iris scissor straight</td>
			<td>Fine Sciences Tolls</td>
			<td>14060-09</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Blunt/bended forceps</td>
			<td>Fine Sciences Tolls</td>
			<td>11080-02</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Brain slicer</td>
			<td>Zivic instruments</td>
			<td>BSMAS005-1</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Surgical blades</td>
			<td>Swann-Morton</td>
			<td>324</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">P200, P1000 pipettes</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Ketamine (Vetalar)</td>
			<td style="width:300px;">Boehringer Ingelheim</td>
			<td>01LC0030&#160;&#160;</td>
			<td style="width:272px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Xylazine (Rompun)</td>
			<td>Bayer</td>
			<td>32371</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Stereotaxic frame</td>
			<td>KOPF</td>
			<td>Model 900</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Hamilton syringe</td>
			<td>Hamilton</td>
			<td>7762-04</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Paraformaldehyde (PFA)</td>
			<td>SIGMA</td>
			<td>158127</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">VECTASTAIN Elite ABC Kit</td>
			<td>vector laboratories</td>
			<td>PK-6100</td>
			<td></td>
		</tr>
	</tbody>
</table>

systemic injection of neural stem/progenitor cells in mice with chronic eae

神经干/祖细胞（的NPC）是一种很有前途的干细胞来源，移植方法，旨在大脑修复或修复再生神经内科。该指令已产生的大量证据显示，大脑修复局灶性或全身性鼻咽癌移植后实现了神经系统疾病的几种临床前模型。 这些实验数据已经确定了细胞传递路线为恢复性干细胞疗法的脑部疾病，需要紧急评估的主要障碍之一。脑实质内干细胞移植术代表逻辑态度来对待这些特点是孤立的和可访问的脑病变，如脊髓损伤和帕金森氏病的病症。不幸的是，这个原则是很差适用特点是多灶性，炎症和传播（无论是在时间和空间）性质，包括多发性硬化症（MS）的条件。因此，脑是由系统·瞄准主位NPC交付已经成为一种低侵入性治疗有效协议，提供细胞到大脑，影响中枢神经系统（CNS）的实验性慢性炎症性损害啮齿类动物和灵长类动物的脊髓。 小区交付这种替代方法依赖于人大pathotropism，特别是他们与生俱来的能力（一） 通过感知功能细胞黏附分子和炎症细胞因子和趋化因子受体的环境; （二）交叉后静脉注射（IV）的泄漏解剖障碍或脑室内（ICV）注射液; （ⅲ）积聚在炎性脑和脊髓损伤血管周围的多个位点（S）的水平;及（iv）发挥卓越组织营养及免疫调节作用到不同的主机的靶细胞在体内 。 在这里，我们描述了我们已经开发了IV的方法。和&lt;em&gt;的同基因的NPC对小鼠实验性自身免疫性脑脊髓炎（EAE）侧脑室递送，作为慢性中枢神经系统炎性脱髓鞘模型，并设想全身干细胞递送作为有价值的技术发炎的大脑中神经再生的选择性靶向。

全国人大推导和表征 SVZ解剖是由机械和酶解（ 图1A）方法为在池进行6-8周龄C57BL / 6小鼠（n = 5-7只小鼠/池）。经过培养的CGM几天，自由浮动的神经球开始形成（ 图1A和1B）。主球被收集和机械传代，每4-5格。传代后，活细胞和死细胞的数目是确定的和累积的细胞数作图以生成生长曲线（ 图1C）。这使传播速率的指示，从而提供了一个间接的参...

Watch this Scientific Journal Video about Systemic Injection of Neural Stem/Progenitor Cells in Mice with Chronic EAE at JoVE.com

Systemic Injection of Neural Stem/Progenitor Cells in Mice with Chronic EAE

神经干/祖细胞（的NPC）的移植持有再生神经内科伟大的应许。全身交付的NPC已经变成有效的，低侵入性的，而且治疗非常有效的协议，提供干细胞在大脑和受中枢神经系统的实验性慢性炎症性损害啮齿类动物和灵长类动物的脊髓。

神经干/祖细胞在小鼠EAE的慢性全身性注射

Neural stem/precursor cells (NPCs) are a promising stem cell source for transplantation approaches aiming at brain repair or restoration in regenerative ...

systemic-injection-neural-stemprogenitor-cells-mice-with-chronic

Research

JoVE Journal

Immunology and Infection

17.6K 次观看.  University of Cambridge, UK. 神经干/祖细胞（的NPC）的移植持有再生神经内科伟大的应许。全身交付的NPC已经变成有效的，低侵入性的，而且治疗非常有效的协议，提供干细胞在大脑和受中枢神经系统的实验性慢性炎症性损害啮齿类动物和灵长类动物的脊髓。 

视频: Systemic Injection of Neural Stem/Progenitor Cells in Mice with Chronic EAE

Identifying DNA Mutations in Purified Hematopoietic Stem/Progenitor Cells

In recent years, it has become apparent that genomic instability is tightly related to many developmental disorders, cancers, and aging. Given that stem cells are responsible for ensuring tissue homeostasis and repair throughout life, it is reasonable to hypothesize that the stem cell population is critical for preserving genomic integrity of tissues. Therefore, significant interest has arisen in assessing the impact of endogenous and environmental factors on genomic integrity in stem cells and their progeny, aiming to understand the etiology of stem-cell based diseases.
LacI transgenic mice carry a recoverable &#955;&#160;phage vector encoding the LacI reporter system, in which the LacI gene serves as the mutation reporter. The result of a mutated LacI gene is the production of &#946;-galactosidase that cleaves a chromogenic substrate, turning it blue. The LacI reporter system is carried in all cells, including stem/progenitor cells and can easily be recovered and used to subsequently infect E. coli. After incubating infected E. coli on agarose that contains the correct substrate, plaques can be scored; blue plaques indicate a mutant LacI gene, while clear plaques harbor wild-type. The frequency of blue (among clear) plaques indicates the mutant frequency in the original cell population the DNA was extracted from. Sequencing the mutant LacI gene will show the location of the mutations in the gene and the type of mutation.
The LacI transgenic mouse model is well-established as an in vivo mutagenesis assay. Moreover, the mice and the reagents for the assay are commercially available. Here we describe in detail how this model can be adapted to measure the frequency of spontaneously occurring DNA mutants in stem cell-enriched Lin-IL7R-Sca-1+cKit++(LSK) cells and other subpopulations of the hematopoietic system.

Here we describe an in vivo mutagenesis assay for small numbers of purified hematopoietic cells using the LacI transgenic mouse model.&#160;The LacI gene can be isolated to determine the frequency, location, and type of DNA mutants&#160;spontaneously arisen or after exposure to genotoxins.

在纯化造血干/祖细胞识别DNA突变

In recent years, it has become apparent that genomic instability is tightly related to many developmental disorders, cancers, and aging. Given that stem ...

科研

免疫与感染

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

A mouse model of chronic airway infection is a key asset in cystic fibrosis (CF) research, although there are a number of concerns regarding the model itself. Early phases of inflammation and infection have been widely studied by using the Pseudomonas aeruginosa agar-beads mouse model, while only few reports have focused on the long-term chronic infection in vivo. The main challenge for long term chronic infection remains the low bacterial burden by P. aeruginosa and the low percentage of infected mice weeks after challenge, indicating that bacterial cells are progressively cleared by the host.
This paper presents a method for obtaining efficient long-term chronic infection in mice. This method is based on the embedding of the P. aeruginosa clinical strains in the agar-beads in vitro, followed by intratracheal instillation in C57Bl/6NCrl mice. Bilateral lung infection is associated with several measurable read-outs including weight loss, mortality, chronic infection, and inflammatory response. The P. aeruginosa RP73 clinical strain was preferred over the PAO1 reference laboratory strain since it resulted in a comparatively lower mortality, more severe lesions, and higher chronic infection. P. aeruginosa colonization may persist in the lung for over three months. Murine lung pathology resembles that of CF patients with advanced chronic pulmonary disease.
This murine model most closely mimics the course of the human disease and can be used both for studies on the pathogenesis and for the evaluation of novel therapies.

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

We describe the agar-beads method to establish persistent long-term chronic Pseudomonas aeruginosa airway infection in the mouse model.

长期慢性<em&gt;铜绿假单胞菌</em&gt;在呼吸道感染小鼠

A mouse model of chronic airway infection is a key asset in cystic fibrosis (CF) research, although there are a number of concerns regarding the model ...

Myelin Oligodendrocyte Glycoprotein (MOG35-55) Induced Experimental Autoimmune Encephalomyelitis (EAE) in C57BL/6 Mice

Multiple sclerosis is a chronic neuroinflammatory demyelinating disorder of the central nervous system with a strong neurodegenerative component. While the exact etiology of the disease is yet unclear, autoreactive T lymphocytes are thought to play a central role in its pathophysiology. MS therapy is only partially effective so far and research efforts continue to expand our knowledge on the pathophysiology of the disease and to develop novel treatment strategies. Experimental autoimmune encephalomyelitis (EAE) is the most common animal model for MS sharing many clinical and pathophysiological features. There is a broad diversity of EAE models which reflect different clinical, immunological and histological aspects of human MS. Actively-induced EAE in mice is the easiest inducible model with robust and replicable results. It is especially suited for investigating the effects of drugs or of particular genes by using transgenic mice challenged by autoimmune neuroinflammation. Therefore, mice are immunized with CNS homogenates or peptides of myelin proteins. Due to the low immunogenic potential of these peptides, strong adjuvants are used. EAE susceptibility and phenotype depends on the chosen antigen and rodent strain. C57BL/6 mice are the commonly used strain for transgenic mouse construction and respond among others to myelin oligodendrocyte glycoprotein (MOG). The immunogenic epitope MOG35-55 is suspended in complete Freund's adjuvant (CFA) prior to immunization and pertussis toxin is applied on the day of immunization and two days later. Mice develop a "classic" self-limited monophasic EAE with ascending flaccid paralysis within 9-14 days after immunization. Mice are evaluated daily using a clinical scoring system for 25-50 days. Special considerations for care taking of animals with EAE as well as potential applications and limitations of this model are discussed.

Myelin Oligodendrocyte Glycoprotein MOG35-55 Induced Experimental Autoimmune Encephalomyelitis EAE in C57BL/6 Mice

Experimental autoimmune encephalomyelitis (EAE) is an established animal model of multiple sclerosis. C57BL/6 mice are immunized with myelin oligodendrocyte glycoprotein (MOG) peptide 35-55 (MOG35-55), resulting in an ascending flaccid paralysis caused by autoreactive immune cells in the central nervous system. Protocols for disease induction and monitoring will be discussed.

髓鞘少突胶质细胞糖蛋白（MOG<sub&gt; 35-55</sub&gt;）诱导实验性自身免疫性脑脊髓炎（EAE）的C57BL / 6小鼠

Multiple sclerosis is a chronic neuroinflammatory demyelinating disorder of the central nervous system with a strong neurodegenerative component. While ...

A Mouse Model for Pathogen-induced Chronic Inflammation at Local and Systemic Sites

Chronic inflammation is a major driver of pathological tissue damage and a unifying characteristic of many chronic diseases in humans including neoplastic, autoimmune, and chronic inflammatory diseases. Emerging evidence implicates pathogen-induced chronic inflammation in the development and progression of chronic diseases with a wide variety of clinical manifestations. Due to the complex and multifactorial etiology of chronic disease, designing experiments for proof of causality and the establishment of mechanistic links is nearly impossible in humans. An advantage of using animal models is that both genetic and environmental factors that may influence the course of a particular disease can be controlled. Thus, designing relevant animal models of infection represents a key step in identifying host and pathogen specific mechanisms that contribute to chronic inflammation.
Here we describe a mouse model of pathogen-induced chronic inflammation at local and systemic sites following infection with the oral pathogen Porphyromonas gingivalis, a bacterium closely associated with human periodontal disease. Oral infection of specific-pathogen free mice induces a local inflammatory response resulting in destruction of tooth supporting alveolar bone, a hallmark of periodontal disease. In an established mouse model of atherosclerosis, infection with P. gingivalis accelerates inflammatory plaque deposition within the aortic sinus and innominate artery, accompanied by activation of the vascular endothelium, an increased immune cell infiltrate, and elevated expression of inflammatory mediators within lesions. We detail methodologies for the assessment of inflammation at local and systemic sites. The use of transgenic mice and defined bacterial mutants makes this model particularly suitable for identifying both host and microbial factors involved in the initiation, progression, and outcome of disease. Additionally, the model can be used to screen for novel therapeutic strategies, including vaccination and pharmacological intervention.

Animal models have proven to be invaluable tools in defining host and pathogen specific mechanisms that contribute to the development of chronic inflammation. Here we describe a mouse model of oral infection with the human pathogen Porphyromonas gingivalis and detail methodologies to assess the progression of inflammation at local and systemic sites.

鼠标型号病原体引起的慢性炎症局部及全身站点

Chronic inflammation is a major driver of pathological tissue damage and a unifying characteristic of many chronic diseases in humans including ...

Phenotypic and Functional Analysis of Activated Regulatory T Cells Isolated from Chronic Lymphocytic Choriomeningitis Virus-infected Mice

Regulatory T (Treg) cells, which express Foxp3 as a transcription factor, are subsets of CD4+ T cells. Treg cells play crucial roles in immune tolerance and homeostasis maintenance by regulating the immune response. The primary role of Treg cells is to suppress the proliferation of effector T (Teff) cells and the production of cytokines such as IFN-&#947;, TNF-&#945;, and IL-2. It has been demonstrated that Treg cells&#39; ability to inhibit the function of Teff cells is enhanced during persistent pathogen infection and cancer development. To clarify the function of Treg cells under resting or inflamed conditions, a variety of in vitro suppression assays using mouse or human Treg cells have been devised. The main aim of this study is to develop a method to compare the differences in phenotype and suppressive function between resting and activated Treg cells. To isolate activated Treg cells, mice were infected with lymphocytic choriomeningitis virus (LCMV) clone 13 (CL13), a chronic strain of LCMV. Treg cells isolated from the spleen of LCMV CL13-infected mice exhibited both the activated phenotype and enhanced suppressive activity compared with resting Treg cells isolated from na&#239;ve mice. Here, we describe the basic protocol for ex vivo phenotype analysis to distinguish activated Treg cells from resting Treg cells. Furthermore, we describe a protocol for the measurement of the suppressive activity of fully activated Treg cells.

Here, we describe a protocol to analyze the phenotype of regulatory T (Treg) cells isolated from na&#239;ve and chronic lymphocytic choriomeningitis virus-infected mice. In addition, we provide a process to evaluate the suppressive activity of the Treg cells.

表型和慢性淋巴细胞性脉络丛脑膜炎病毒感染小鼠中分离激活调节性T细胞的功能分析

Regulatory T (Treg) cells, which express Foxp3 as a transcription factor, are subsets of CD4+ T cells. Treg cells play crucial roles in immune tolerance ...

Analysis of Lymphocyte Extravasation Using an In Vitro Model of the Human Blood-brain Barrier

Lymphocyte extravasation into the central nervous system (CNS) is critical for immune surveillance. Disease-related alterations of lymphocyte extravasation might result in pathophysiological changes in the CNS. Thus, investigation of lymphocyte migration into the CNS is important to understand inflammatory CNS diseases and to develop new therapy approaches. Here we present an in vitro model of the human blood-brain barrier to study lymphocyte extravasation. Human brain microvascular endothelial cells (HBMEC) are confluently grown on a porous polyethylene terephthalate transwell insert to mimic the endothelium of the blood-brain barrier. Barrier function is validated by zonula occludens immunohistochemistry, transendothelial electrical resistance (TEER) measurements as well as analysis of evans blue permeation. This model allows investigation of the diapedesis of rare lymphocyte subsets such as CD56brightCD16dim/- NK cells. Furthermore, the effects of other cells, cytokines and chemokines, disease-related alterations, and distinct treatment regimens on the migratory capacity of lymphocytes can be studied. Finally, the impact of inflammatory stimuli as well as different treatment regimens on the endothelial barrier can be analyzed.

Analysis of Lymphocyte Extravasation Using an In Vitro Model of the Human Blood-brain Barrier

Here, we describe a human blood-brain barrier model enabling to investigate lymphocyte transmigration into the central nervous system in vitro.

使用的淋巴细胞外渗分析<em&gt;体外</em&gt;人类血脑屏障模型

Lymphocyte extravasation into the central nervous system (CNS) is critical for immune surveillance. Disease-related alterations of lymphocyte ...

A Chronic Autoimmune Dry Eye Rat Model with Increase in Effector Memory T Cells in Eyeball Tissue

Dry eye disease is a very common condition that causes morbidity and healthcare burden and decreases the quality of life. There is a need for a suitable dry eye animal model to test novel therapeutics to treat autoimmune dry eye conditions. This protocol describes a chronic autoimmune dry eye rat model. Lewis rats were immunized with an emulsion containing lacrimal gland extract, ovalbumin, and complete Freund&#39;s adjuvant. A second immunization with the same antigens in incomplete Freund&#39;s adjuvant was administered two weeks later. These immunizations were administered subcutaneously at the base of the tail. To boost the immune response at the ocular surface and lacrimal glands, lacrimal gland extract and ovalbumin were injected into the forniceal subconjunctiva and lacrimal glands 6 weeks after the first immunization. The rats developed dry eye features, including reduced tear production, decreased tear stability, and increased corneal damage. Immune profiling by flow cytometry showed a preponderance of CD3+ effector memory T cells in the eyeball.

This report describes a method to induce chronic experimental autoimmune dry eye in Lewis rats through immunization with an emulsion of rat lacrimal gland extract, ovalbumin, and complete Freund's adjuvant, followed by the injection of lacrimal gland extract and ovalbumin into the forniceal subconjunctiva and lacrimal glands six weeks later.

慢性自身免疫性干眼鼠模型增加效应记忆T细胞在眼球组织

Dry eye disease is a very common condition that causes morbidity and healthcare burden and decreases the quality of life. There is a need for a suitable ...

Blocking Lymph Flow by Suturing Afferent Lymphatic Vessels in Mice

Lymphatic vessels are critical in maintaining tissue fluid balance and optimizing immune protection by transporting antigens, cytokines, and cells to draining lymph nodes (LNs). Interruption of lymph flow is an important method when studying the function of lymphatic vessels. The afferent lymphatic vessels from the murine footpad to the popliteal lymph nodes (pLNs) are well-defined as the only routes for lymph drainage into the pLNs. Suturing these afferent lymphatic vessels can selectively prevent lymph flow to the pLNs. This method allows for interference in lymph flow with minimal damage to the lymphatic endothelial cells in the draining pLN, the afferent lymphatic vessels, as well as other lymphatic vessels around the area. This method has been used to study how lymph impacts high endothelial venules (HEV) and chemokine expression in the LN, and how lymph flows through the adipose tissue surrounding the LN in the absence of functional lymphatic vessels. With the growing recognition of the importance of lymphatic function, this method will have broader applications to further unravel the function of lymphatic vessels in regulating the LN microenvironment and immune responses.

A protocol to block lymph flow by surgical suturing of afferent lymphatic vessels is presented.

通过在小鼠中吸液性淋巴血管阻止淋巴流

Lymphatic vessels are critical in maintaining tissue fluid balance and optimizing immune protection by transporting antigens, cytokines, and cells to ...

A Minimally Invasive, Accurate, and Efficient Technique for Intrathymic Injection in Mice

Intrathymic injection in mouse models is an important technique for studying thymic and immune function, including genetic and acquired T cell disorders. This requires methods for the direct deposition of reagents and/or cells into the thymus of living mice. Traditional methods of intrathymic injection include thoracic surgery or minimally invasive percutaneous blind injections, both of which have significant limitations. Ultra-high frequency ultrasound imaging devices have made image-guided percutaneous injections possible in mice, greatly improving the injection accuracy of the percutaneous injection approach and enabling the injection of smaller targets. However, image-guided injections rely on the utilization of an integrated rail system, making this a rigid and time-consuming procedure. A unique, safe, and efficient method for percutaneous intrathymic injections in mice is presented here, eliminating reliance on the rail system for injections. The technique relies on using a high-resolution micro-ultrasound unit to image the mouse thymus noninvasively. Using a free-hand technique, a radiologist can place a needle tip directly into the mouse thymus under sonographic guidance. Mice are cleaned and anesthetized before imaging. For an experienced radiologist adept at ultrasound-guided procedures, the learning period for the stated technique is quite short, typically within one session. The method has a low morbidity and mortality rate for the mice and is much faster than current mechanically assisted techniques for percutaneous injection. It allows the investigator to efficiently perform precise and reliable percutaneous injections of thymuses of any size (including very small organs such as the thymus of aged or immunodeficient mice) with minimal stress on the animal. This method enables the injection of individual lobes if desired and facilitates large-scale experiments due to the time-saving nature of the procedure.

The present protocol describes an interventional radiology procedure established for intrathymic injection in mice to avoid the risk of open surgery and improve the accuracy of blind percutaneous injections.

一种微创、准确、高效的小鼠胸腺内注射技术

Intrathymic injection in mouse models is an important technique for studying thymic and immune function, including genetic and acquired T cell disorders. ...

使用双染料活细胞分析定量 NET 形成

Real-Time High Throughput Technique to Quantify Neutrophil Extracellular Traps Formation in Human Neutrophils

Neutrophils are myeloid-lineage cells that form a crucial part of the innate immune system. The past decade has revealed additional key roles that neutrophils play in the pathogenesis of cancer, autoimmune diseases, and various acute and chronic inflammatory conditions by contributing to the initiation and perpetuation of immune dysregulation through multiple mechanisms, including the formation of neutrophil extracellular traps (NETs), which are structures crucial in antimicrobial defense. Limitations in techniques to quantify NET formation in an unbiased, reproducible, and efficient way have restricted our ability to further understand the role of neutrophils in health and diseases. We describe an automated, real-time, high-throughput method to quantify neutrophils undergoing NET formation using a live cell imaging platform coupled with a membrane permeability-dependent dual-dye approach using two different DNA dyes to image intracellular and extracellular DNA. This methodology is able to help assess neutrophil physiology and test molecules that can target NET formation.

作者聚焦:使用双色活细胞成像定量疾病中的中性粒细胞细胞外陷阱和药物筛选

We present an automated high-throughput method to quantify neutrophil extracellular traps (NETs) utilizing the live cell analysis system, coupled with a membrane permeability-dependent dual-dye approach.