制备细胞<ol><li> M199/10％胎牛血清/笔链球菌（1:100）前1-2天钉珠人脐静脉内皮细胞和成纤维细胞。 </li><li>开关中EGM - 2（Clonetics）一天HUVEC和一天前珠串成纤维细胞前嵌入。 </li><li> 〜400人脐静脉内皮细胞，每珠浓度是必要的。 </li><li> 20,000元以及成纤维细胞是必要的。 </li></ol>涂层珠与人脐静脉内皮细胞 - 天-1 <ol><li> Trypsinize人脐静脉内皮细胞。 </li><li>允许珠解决（请勿离心机！）。吸出上清液，1毫升温暖EGM - 2培养基洗珠简要。 </li><li>混合2500珠W / 1X10 6血管内皮细胞在1.5毫升的温暖EGM - 2在流式细胞仪管媒介。孵化器在垂直的地方。 （这将是足够的〜10口井。规模，如果需要的话） </li><li>在37℃孵育4小时，每20分钟摇动管。 （涂好发芽的关键。） </li><li> 4小时后，转移涂层珠，在EGM - 2毫升的T25烧瓶和离开的O / N。 </li></ol>嵌入纤维蛋白凝胶包被的磁珠 - 0天<ol><li>准备2.0 mg / mL的纤维蛋白原的解决方案（见配方一节）。 </li><li> 0.15单位/毫升抑肽酶，加入纤维蛋白原的解决方案。 </li><li>涂珠转移到15ML的锥形管，让珠定居。 1ML EGM - 2和转移到1.5ml离心管中的悬浮珠。 </li><li>洗净珠3X EGM - 2 1ML pipeting起来，慢慢放下。 </li><li>珠盖玻片计数和纤维蛋白原溶液重悬〜500珠/毫升的浓度。 </li><li>添加0.625单位/ mL的凝血酶每口井。 </li><li>每孔24孔板加入0.5毫升的纤维蛋白原/磁珠悬浮。 更改为每口井的枪头 ！ </li><li>混合向上和向下枪头轻轻〜4至5倍的凝血酶和纤维蛋白原。要小心，不要让大的气泡。 </li><li>板留在引擎盖5分钟，然后放置10-15分钟，以生成一个血块在37℃的孵化器。 </li><li>在等待血块的同时，trypsinize成纤维细胞。 </li><li>添加1毫升EGM - 2％下降明智。 </li><li>种子成纤维细胞纤维蛋白凝胶的顶部20,000元细胞的浓度。 </li></ol> 注意事项： 通常情况下，纤维蛋白凝胶形成时，你会看到微小的气泡，在凝胶。不要担心，他们将在3-4天消失。 更改媒体隔日，即第2天，4，6，等.. 第3天或4，你应该开始看到发芽。

<ol>
	<li>Nehls, V., Drenckhahn, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+microcarrier-based+cocultivation+system+for+the+investigation+of+factors+and+cells+involved+in+angiogenesis+in+three-dimensional+fibrin+matrices+in+vitro.">A microcarrier-based cocultivation system for the investigation of factors and cells involved in angiogenesis in three-dimensional fibrin matrices in vitro.</a> Histochem Cell Biol. 104, 459-466 (1995).</li><li>Nehls, V., Drenckhahn, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+novel,+microcarrier-based+in+vitro+assay+for+rapid+and+reliable+quantification+of+three-dimensional+cell+migration+and+angiogenesis.">A novel, microcarrier-based in vitro assay for rapid and reliable quantification of three-dimensional cell migration and angiogenesis.</a> Microvasc Res. 50, 311-322 (1995).</li></ol>

有越来越多的共识，三维（3D）在体外血管生成的实验提供了一个模型，它在体内更接近实际环境比可达到使用2D文化。很明显，优越的3D系统应重现性好，能够模仿一些血管生成的主要步骤。虽然前几届的3D检测得到了发展，其中许多可以使用难以取得微血管细胞，或仅复述一些阶段。在这个视频中，我们描述和执行在体外血管生成试验，利用人脐静脉EC，这是很容易获得和在血管研究中最常用的EC的优化。该试?...

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">	
		
		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<tr>
<td>Cytodex-3 Beads</td>
<td>Reagent</td>
<td>Amersham Pharmacia</td>
<td>17-0485-01</td>
<td>10 g/bottle. 
1.	0.5 g of dry beads are hydrated and swollen in 50 mL PBS (pH=7.4) for at least 3 hours at RT.
Use a 50 mL tube and place it on the rocker.
2.	Let the beads settle down (~ 15 min). Discard the supernatant and wash the beads for a few minutes in fresh PBS (50 mL).
3.	Discard the PBS and replace with fresh PBS:
25 mL -> 20 mg/mL => 60000 beads/mL or
50 mL -> 10 mg/mL => 30000 beads/ mL
4.	Place the bead suspension in a siliconized glass bottle (Windshield Wiper or Sigmacote).
5.	Sterilize the beads by autoclaving for 15 min at 115&#xF0B0;C.
6.	Store it at 4&#xF0B0;C.
</td>
</tr>
<tr>
<td>Aprotinin</td>
<td>Reagent</td>
<td>Sigma</td>
<td>A-1153</td>
<td>10mg/bottle. Reconstitute lyophilized aprotinin at 4 U/mL in DI water. Sterile filter. Make aliquots of 1 mL each. Store at -20C.
</td>
</tr>
<tr>
<td>Fibrinogen Type I</td>
<td>Reagent</td>
<td>Sigma</td>
<td>F-8630</td>
<td>1g. Dissolve 2 mg/mL fibrinogen in DPBS
Note clottable protein % and adjust accordingly 
Heat in a 37&#xF0B0;C-water bath to dissolve the fibrinogen. Mix by inverting the tube. Do not vortex.
Sterile filter through 0.22 um
</td>
</tr>
<tr>
<td>Thrombin</td>
<td>Reagent</td>
<td>Sigma</td>
<td>T-3399</td>
<td>22 mg=1000 units. Reconstitute in sterile water at 50 U/mL. Make aliquots of 0.5 mL each. Store at -20C.
</td>
</tr>		</tbody>
		</table>
		</div>
			<div>
					</div>

optimized fibrin gel bead assay for the study of angiogenesis

血管生成是一个复杂的多步骤的过程，在血管生成刺激，新船都从现有的血管创建。这些步骤包括：降解基底膜，增殖和迁移（发芽）内皮细胞到细胞外基质，成线对齐欧共体（EC），分支，管腔形成，吻合术，并形成一个新的基底膜。在体外实验中有许多已开发研究这个过程，但大多只模仿血管生成的某些阶段，形态内检测的船只往往并不像在体内的船只。早期Nehls和Drenckhahn工作的基础上，我们进行了优化，利用人脐静脉EC和成纤维细胞在体外血管生成试验。这种模式概括所有的血管生成的关键早期阶段，重要的是，船只显示极化欧共体包围专利间流明。欧共体涂到cytodex微载体，并嵌入到纤维蛋白凝胶。成纤维细胞分层他们提供必要的可溶性因子，促进欧共体从珠的表面发芽的凝胶上。几天后，无数的船只，可以很容易地相衬和时间推移显微镜下观察。本视频演示了在建立这些文化的关键步骤。

Watch this Scientific Journal Video about Optimized Fibrin Gel Bead Assay for the Study of Angiogenesis at JoVE.com

Optimized Fibrin Gel Bead Assay for the Study of Angiogenesis

本视频演示了一个协议，在体外血管生成试验，概括的血管生成的几个阶段。显示图像时间的推移，发芽，管腔形成，分支和吻合 - 血管生成的关键特征 - 。

优化的纤维蛋白凝胶珠检测血管生成的研究

Angiogenesis is a complex multi-step process, where, in response to angiogenic stimuli, new vessels are created from the existing vasculature.  These ...

optimized-fibrin-gel-bead-assay-for-the-study-of-angiogenesis

Research

JoVE Journal

Biology

31.4K 次观看.  University of California, Irvine (UCI). 本视频演示了一个协议，在体外血管生成试验，概括的血管生成的几个阶段。显示图像时间的推移，发芽，管腔形成，分支和吻合 - 血管生成的关键特征 - 。

视频: Optimized Fibrin Gel Bead Assay for the Study of Angiogenesis

Testing Visual Sensitivity to the Speed and Direction of Motion in Lizards

Testing visual sensitivity in any species provides basic information regarding behaviour, evolution, and ecology. However, testing specific features of the visual system provide more empirical evidence for functional applications. Investigation into the sensory system provides information about the sensory capacity, learning and memory ability, and establishes known baseline behaviour in which to gauge deviations (Burghardt, 1977). However, unlike mammalian or avian systems, testing for learning and memory in a reptile species is difficult. Furthermore, using an operant paradigm as a psychophysical measure of sensory ability is likewise as difficult. Historically, reptilian species have responded poorly to conditioning trials because of issues related to motivation, physiology, metabolism, and basic biological characteristics. Here, I demonstrate an operant paradigm used a novel model lizard species, the Jacky dragon (Amphibolurus muricatus) and describe how to test peripheral sensitivity to salient speed and motion characteristics. This method uses an innovative approach to assessing learning and sensory capacity in lizards. I employ the use of random-dot kinematograms (RDKs) to measure sensitivity to speed, and manipulate the level of signal strength by changing the proportion of dots moving in a coherent direction. RDKs do not represent a biologically meaningful stimulus, engages the visual system, and is a classic psychophysical tool used to measure sensitivity in humans and other animals. Here, RDKs are displayed to lizards using three video playback systems. Lizards are to select the direction (left or right) in which they perceive dots to be moving. Selection of the appropriate direction is reinforced by biologically important prey stimuli, simulated by computer-animated invertebrates.

Testing visual sensitivity in lizards using an operant conditioning paradigm that employs video playback of random-dot kinematograms and computer-generated invertebrates.

测试的速度和运动方向的视觉灵敏度在蜥蜴

Testing visual sensitivity in any species provides basic information regarding behaviour, evolution, and ecology. However, testing specific features of ...

科研

生物学

Christopher Hughes:  An in vitro model for the Study of Angiogenesis (Interview)

Christopher C.W. Hughes describes the utility of his culture system for studying angiogenesis in vitro.  He explains the importance of fibroblasts that secrete a critical, yet unidentified, soluble factor that allow endothelial cells to form vessels in culture that branch, form proper lumens, and undergo anastamosis.

Christopher Hughes:  An in vitro model for the Study of Angiogenesis Interview

Christopher C.W. Hughes describes the utility of his culture system for studying angiogenesis in vitro. He explains the importance of fibroblasts that secrete a critical, yet unidentified, soluble factor that allow endothelial cells to form vessels in culture that branch, form proper lumens, and undergo anastamosis.

克里斯托弗休斯：在体外血管生成的研究模型（面试）

Christopher C.W. Hughes describes the utility of his culture system for studying angiogenesis in vitro.  He explains the importance of fibroblasts that ...

Computer-Generated Animal Model Stimuli

Communication between animals is diverse and complex. Animals may communicate using auditory, seismic, chemosensory, electrical, or visual signals. In particular, understanding the constraints on visual signal design for communication has been of great interest. Traditional methods for investigating animal interactions have used basic observational techniques, staged encounters, or physical manipulation of morphology. Less intrusive methods have tried to simulate conspecifics using crude playback tools, such as mirrors, still images, or models. As technology has become more advanced, video playback has emerged as another tool in which to examine visual communication (Rosenthal, 2000). However, to move one step further, the application of computer-animation now allows researchers to specifically isolate critical components necessary to elicit social responses from conspecifics, and manipulate these features to control interactions. Here, I provide detail on how to create an animation using the Jacky dragon as a model, but this process may be adaptable for other species. In building the animation, I elected to use Lightwave  3D to alter object morphology, add texture, install bones, and provide comparable weight shading that prevents exaggerated movement. The animation is then matched to select motor patterns to replicate critical movement features. Finally, the sequence must rendered into an individual clip for presentation. Although there are other adaptable techniques, this particular method had been demonstrated to be effective in eliciting both conspicuous and social responses in staged interactions.

Computer-generated stimuli using the Jacky dragon as a model.

计算机生成的动物模型的刺激

Communication between animals is diverse and complex. Animals may communicate using auditory, seismic, chemosensory, electrical, or visual signals. In ...

Isolation and Purification of Drosophila Peripheral Neurons by Magnetic Bead Sorting

The Drosophila peripheral nervous system (PNS) is a powerful model for investigating the complex processes of neuronal development and dendrite morphogenesis at the functional and molecular levels. To aid in these analyses, we have developed a strategy for the isolation of a subclass of PNS neurons called dendritic arborization (da) neurons that have been widely used for studying dendrite morphogenesis1,2. These neurons are very difficult to isolate as a pure population, due in part to their extremely low occurrence and their difficult-to-reach location below the tough chitinous larval cuticle. Our newly developed method overcomes these challenges, and is based on a fast and specific cell enrichment using antibody-coated magnetic beads. For our magnetic bead sorting studies, we have used age-matched third instar larvae expressing a mouse CD8 tagged GFP fusion protein (UAS-mCD8-GFP)3 under the control of either the class IV dendritic arborization (da) neuron-specific pickpocket (ppk)-GAL4 driver4 or the control of the pan-da neuron-specific GAL421-7 driver5. Although this protocol has been optimized for isolating PNS cells which are attached to the inner wall of the larval cuticle, by varying a few parameters, the same protocol could be used to isolate many different cell types attached to the cuticle at larval or pupal stages of development (e.g. epithelia, muscle, oenocytes etc.), or other cell types from larval organs depending upon the GAL4-specific driver expression pattern. The RNA isolated by this method is of high quality and can be readily used for downstream genomic analyses such as microarray gene expression profiling studies. This approach offers a powerful new tool to perform studies on isolated Drosophila dendritic arborization (da) neurons thereby providing novel insights into the molecular mechanisms underlying dendrite morphogenesis.

Isolation and Purification of Drosophila Peripheral Neurons by Magnetic Bead Sorting

In this video-article we present a method for the isolation and purification of Drosophila peripheral neurons using a fast magnetic bead assisted cell sorting strategy. RNA obtained from the isolated cells can be readily used for downstream applications including microarray analyses.

分离纯化果蝇</em磁性微球的排序>外周神经元

The Drosophila peripheral nervous system (PNS) is a powerful model for investigating the complex processes of neuronal development and dendrite ...

Rat Mesentery Angiogenesis Assay

The adult rat mesentery window angiogenesis assay is biologically appropriate and is exceptionally well suited to the 
study of sprouting angiogenesis in vivo [see review papers], which is the dominating form of angiogenesis in human tumors and non-tumor 
tissues, as discussed in invited review papers1,2. Angiogenesis induced in the membranous mesenteric parts by intraperitoneal (i.p.) injection of a pro-angiogenic factor can be modulated
by subcutaneous (s.c.), intravenous (i.v.) or oral (p.o.) treatment with modifying agents of choice. Each membranous part of the mesentery is 
translucent and framed by fatty tissue, giving it a window-like appearance.
The assay has the following advantageous features: (i) the test tissue is natively vascularized, albeit 
sparsely, and since it is extremely thin, the microvessel network is virtually two-dimensional, which allows the entire network 
to be assessed microscopically in situ; (ii) in adult rats the test tissue lacks significant physiologic angiogenesis, which characterizes
 most normal adult mammalian tissues; the degree of native vascularization is, however, correlated with age, as discussed in1; 
(iii) the negligible level of trauma-induced angiogenesis ensures high sensitivity; (iv) the 
assay replicates the clinical situation, as the angiogenesis-modulating test drugs are administered systemically and the responses 
observed reflect the net effect of all the metabolic, cellular, and molecular alterations induced by the treatment; (v) the assay 
allows assessments of objective, quantitative, unbiased variables of microvascular spatial extension, density, and network pattern 
formation, as well as of capillary sprouting, thereby enabling robust statistical analyses of the dose-effect and molecular 
structure-activity relationships; and (vi) the assay reveals with high sensitivity the toxic or harmful effects of treatments in 
terms of decreased rate of physiologic body-weight gain, as adult rats grow robustly.
Mast-cell-mediated angiogenesis was first demonstrated using this assay3,4. The model demonstrates a high level of 
discrimination regarding dosage-effect relationships and the measured effects of systemically administered chemically or functionally closely related drugs and proteins, 
including: (i) low-dosage, metronomically administered standard chemotherapeutics that yield diverse, drug-specific effects (i.e., 
angiogenesis-suppressive, neutral or angiogenesis-stimulating activities5); (ii) natural iron-unsaturated human lactoferrin, which stimulates 
VEGF-A-mediated angiogenesis6, and natural iron-unsaturated bovine lactoferrin, which inhibits VEGF-A-mediated angiogenesis7; and (iii) 
low-molecular-weight heparin fractions produced by various means8,9. Moreover, the assay is highly suited to studies of the combined 
effects on angiogenesis of agents that are administered systemically in a concurrent or sequential fashion.
The idea of making this video originated from the late Dr. Judah Folkman when he visited our laboratory and witnessed the methodology being demonstrated.
Review papers (invited) discussing and appraising the assay
Norrby, K. In vivo models of angiogenesis. J. Cell. Mol. Med. 10, 588-612 (2006).
Norrby, K. Drug testing with angiogenesis models. Expert Opin. Drug. Discov. 3, 533-549 (2008).

Normal adult vascularized mammalian tissue that lacks physiologic angiogenesis and that has not been exposed to surgical intervention is used to study: (i) the initiation and development of angiogenesis following intraperitoneal administration of test agents; and (ii) modification of angiogenesis following systemic administration of selected test agents.

大鼠肠系膜血管生成法

The adult rat mesentery window angiogenesis assay is biologically appropriate and is exceptionally well suited to the 
study of sprouting angiogenesis in ...

Endothelial Cell Tube Formation Assay for the In Vitro Study of Angiogenesis

Angiogenesis is a vital process for normal tissue development and wound healing, but is also associated with a variety of pathological conditions. Using this protocol, angiogenesis may be measured in vitro in a fast, quantifiable manner. Primary or immortalized endothelial cells are mixed with conditioned media and plated on basement membrane matrix. The endothelial cells form capillary like structures in response to angiogenic signals found in conditioned media. The tube formation occurs quickly with endothelial cells beginning to align themselves within 1&#160;hr and lumen-containing tubules beginning to appear within 2 hr. Tubes can be visualized using a phase contrast inverted microscope, or the cells can be treated with calcein AM prior to the assay and tubes visualized through fluorescence or confocal microscopy. The number of branch sites/nodes, loops/meshes, or number or length of tubes formed can be easily quantified as a measure of in vitro angiogenesis. In summary, this assay can be used to identify genes and pathways that are involved in the promotion or inhibition of angiogenesis in a rapid, reproducible, and quantitative manner.

Endothelial Cell Tube Formation Assay for the In Vitro Study of Angiogenesis

The tube formation assay is a fast, quantifiable method for measuring in vitro angiogenesis. Endothelial cells are combined with conditioned media and plated on basement membrane extract. Tube formation occurs within hours and newly formed tubules easily quantified.

内皮细胞小管形成实验的<em&gt;在体外</em&gt;研究血管生成

Angiogenesis is a vital process for normal tissue development and wound healing, but is also associated with a variety of pathological conditions. Using ...

A Simple Bioassay for the Evaluation of Vascular Endothelial Growth Factors

The analysis of receptor tyrosine kinases and their interacting ligands involved in vascular biology is often challenging due to the constitutive expression of families of related receptors, a broad range of related ligands and the difficulty of dealing with primary cultures of specialized endothelial cells. Here we describe a bioassay for the detection of ligands to the vascular endothelial growth factor receptor-2 (VEGFR-2), a key transducer of signals that promote angiogenesis and lymphangiogenesis. A cDNA encoding a fusion of the extracellular (ligand-binding) region of VEGFR-2 with the transmembrane and cytoplasmic regions of the erythropoietin receptor (EpoR) is expressed in the factor-dependent cell line Ba/F3. This cell line grows in the presence of interleukin-3 (IL-3) and withdrawal of this factor results in death of the cells within 24 hr. Expression of the VEGFR-2/EpoR receptor fusion provides an alternative mechanism to promote survival and potentially proliferation of stably transfected Ba/F3 cells in the presence of a ligand capable of binding and cross-linking the extracellular portion of the fusion protein (i.e., one that can cross-link the VEGFR-2 extracellular region). The assay can be performed in two ways: a semi-quantitative approach in which small volumes of ligand and cells permit a rapid result in 24 hr, and a quantitative approach involving surrogate markers of a viable cell number. The assay is relatively easy to perform, is highly responsive to known VEGFR-2 ligands and can accommodate extracellular inhibitors of VEGFR-2 signaling such as monoclonal antibodies to the receptor or ligands, and soluble ligand traps.

We describe a simple cell-based bioassay for detecting, quantifying and monitoring the activity of members of the vascular endothelial growth factor family of ligands. The assay uses chimeric receptors expressed in a factor-dependent cell line to provide a semi-quantitative or quantitative assessment of receptor binding and cross-linking by the ligand.

一个简单的生物测定血管内皮生长因子的评价

The analysis of receptor tyrosine kinases and their interacting ligands involved in vascular biology is often challenging due to the constitutive ...

In Vivo Study of Human Endothelial-Pericyte Interaction Using the Matrix Gel Plug Assay in Mouse

Angiogenesis is the process by which new blood vessels are formed from existing vessels. New vessel growth requires coordinated endothelial cell proliferation, migration, and alignment to form tubular structures followed by recruitment of pericytes to provide mural support and facilitate vessel maturation. Current in vitro cell culture approaches cannot fully reproduce the complex biological environment where endothelial cells and pericytes interact to produce functional vessels. We present a novel application of the in vivo matrix gel plug assay to study endothelial-pericyte interactions and formation of functional blood vessels using severe combined immune deficiency mutation (SCID) mice. Briefly, matrix gel is mixed with a solution containing endothelial cells with or without pericytes followed by injection into the back of anesthetized SCID mice. After 14 days, the matrix gel plugs are removed, fixed and sectioned for histological analysis. The length, number, size and extent of pericyte coverage of mature vessels (defined by the presence of red blood cells in the lumen) can be quantified and compared between experimental groups using commercial statistical platforms. Beyond its use as an angiogenesis assay, this matrix gel plug assay can be used to conduct genetic studies and as a platform for drug discovery. In conclusion, this protocol will allow researchers to complement available in vitro assays for the study of endothelial-pericyte interactions and their relevance to either systemic or pulmonary angiogenesis.

In Vivo Study of Human Endothelial-Pericyte Interaction Using the Matrix Gel Plug Assay in Mouse

We present a protocol to study human endothelial-pericyte interactions in mouse using a variation of the matrix gel plug angiogenesis assay.

在人类内皮周细胞的相互作用使用基质凝胶插件检测小鼠的体内研究

Angiogenesis is the process by which new blood vessels are formed from existing vessels. New vessel growth requires coordinated endothelial cell ...

An Ex Vivo Choroid Sprouting Assay of Ocular Microvascular Angiogenesis

Pathological choroidal angiogenesis, a salient feature of age-related macular degeneration, leads to vision impairment and blindness. Endothelial cell (EC) proliferation assays using human retinal microvascular endothelial cells (HRMECs) or isolated primary retinal ECs are widely used in vitro models to study retinal angiogenesis. However, isolating pure murine retinal endothelial cells is technically challenging and retinal ECs may have different proliferation responses than choroidal endothelial cells and different cell/cell interactions. A highly reproducible ex vivo choroidal sprouting assay as a model of choroidal microvascular proliferation was developed. This model includes the interaction between choroid vasculature (EC, macrophages, pericytes) and retinal pigment epithelium (RPE). Mouse RPE/choroid/scleral explants are isolated and incubated in growth-factor-reduced basal membrane extract (BME) (day 0). Medium is changed every other day and choroid sprouting is quantified at day 6. The images of individual choroid explant are taken with an inverted phase microscope and the sprouting area is quantified using a semi-automated macro plug-in to the ImageJ software developed in this lab. This reproducible ex vivo choroidal sprouting assay can be used to assess compounds for potential treatment and for microvascular disease research to assess pathways involved in choroidal micro vessel proliferation using wild type and genetically modified mouse tissue.

This protocol presents choroid sprouting assay, an ex vivo model of microvascular proliferation. This assay can be used to assess pathways involved in proliferating choroidal micro vessels and assess drug treatments using wild type and genetically modified mouse tissue.

眼部微血管血管生成前维沃胆球状芽分析

Pathological choroidal angiogenesis, a salient feature of age-related macular degeneration, leads to vision impairment and blindness. Endothelial cell ...

使用改良基质凝胶塞测定简化血管生成研究

Modified In Vivo Matrix Gel Plug Assay for Angiogenesis Studies

Several models have been developed to investigate angiogenesis in vivo. However, most of these models are complex and expensive, require specialized equipment, or are hard to perform for subsequent quantitative analysis. Here we present a modified matrix gel plug assay to evaluate angiogenesis in vivo. In this protocol, vascular cells were mixed with matrix gel in the presence or absence of pro-angiogenic or anti-angiogenic reagents, and then subcutaneously injected into the back of recipient mice. After 7 days, phosphate buffer saline containing dextran-FITC is injected via the tail vein and circulated in vessels for 30 min. Matrix gel plugs are collected and embedded with tissue embedding gel, then 12 &#181;m sections are cut for fluorescence detection without staining. In this assay, dextran-FITC with high molecular weight (~150,000 Da) can be used to indicate functional vessels for detecting their length, while dextran-FITC with low molecular weight (~4,400 Da) can be used to indicate the permeability of neo-vessels. In conclusion, this protocol can provide a reliable and convenient method for the quantitative study of angiogenesis in vivo.

作者聚焦：通过改良基质凝胶塞测定研究血管生成和血管通透性

The method presented here can evaluate the effect of reagents on angiogenesis or vascular permeability in vivo without staining. The method uses dextran-FITC injection via the tail vein to visualize neo-vessels or vascular leakage.

用于血管生成研究 的改良体内 基质凝胶塞测定

Several models have been developed to investigate angiogenesis in vivo. However, most of these models are complex and expensive, require specialized ...