Name: angiogenesis in the ischemic rat lung
Uploaded: 2013-02-08T13:00:00
Description: Watch this Scientific Journal Video about Angiogenesis in the Ischemic Rat Lung at JoVE.com

Vi erkänner det arbete som Dr Adlah Sukkar, VD bistå med gjutning av lungan. Detta arbete har finansierats av NHLBI, HL088005.

Alla protokoll som utförs på råttor har godkänts av Johns Hopkins University Animal Care och användning kommittén och i enlighet med NIH riktlinjer. Om möjligt bör djuret vara kirurgiskt prepped i ett område skilt från operationsområdet för att minimera kontamination av operationsområdet. 1. Anestesi / analgesi <ol><li> Placera råtta (Sprague Dawley hanråttor, 125-150 g, Harlan, Indianapolis, IN) i en induktionskammare infunderas med 3% isofluran. </li><li> Placera sövd rå...

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M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Lung+reperfusion+injury+after+chronic+or+acute+unilateral+pulmonary+artery+occlusion.">Lung reperfusion injury after chronic or acute unilateral pulmonary artery occlusion.</a> Am. J. Respir. Crit. Care Med. 157, 1294-1230 (1998).</li><li>Charan, N. B., Carvalho, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Angiogenesis+in+bronchial+circulatory+system+after+unilateral+pulmonary+artery+obstruction.">Angiogenesis in bronchial circulatory system after unilateral pulmonary artery obstruction.</a> J. Appl. 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Physiol. 110, 538-544 (2011).</li><li>Remy-Jardin, M., Bouaziz, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bronchial+and+nonbronchial+systemic+arteries+at+multi-detector+row+CT+angiography:+comparison+with+conventional+angiography.">Bronchial and nonbronchial systemic arteries at multi-detector row CT angiography: comparison with conventional angiography.</a> Radiology. 233, 741-749 (2004).</li><li>Baluk, P., Tammela, T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pathogenesis+of+persistent+lymphatic+vessel+hyperplasia+in+chronic+airway+inflammation.">Pathogenesis of persistent lymphatic vessel hyperplasia in chronic airway inflammation.</a> J. Clin. Invest. 115, 247-257 (2005).</li><li>Bailey, S. 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Vänster lungartären ligering i alla testade arter leder till kraftig systemisk neovaskularisation av ischemisk lungan. Vi har presenterat detaljerna i den kirurgiska metoden i en råttmodell. Våra resultat som produceras av vaskulär gjutning, histopatologi, och in vivo märkning visar att bronkiala artärerna prolifererar och perfundera det pulmonella parenkymet. Sålunda kan mekanismer bronkial angiogenes studeras i en djurmodell som är parallell det mänskliga tillståndet av kronisk pulmonell tromboembo...

Systemisk angiogenes i lungan är välkänt. I sjukdomstillstånd, såsom astma 2, interstitiell lungfibros 3, cancer 4, och kronisk pulmonell tromboembolism 5, den systemiska vaskulaturen i och omger lungorna prolifererar och invaderar pulmonell parenkymet. Emellertid, djurmodeller för att studera denna differentiell aktivering av den systemiska snarare än lungkretsloppet är få. Kanske den mest reproducerbar modell av systemisk neovaskularisation i lungan av den vuxna däggdjuret är den som inträffar efter inducera kronisk lungartären ischemi. Svaret på vänstra lungartären obstruktion i människor 5-7, hundar 8, är grisar 9, 10 får, marsvin 11, råttor 1, 12, 13, och möss 14 den snabba spridningen av bronkial artären samt interkostala artärer. De mekanismer som ansvarar för systemisk neovascularisation av lungan efter pulmonell ischemi är till stor del okända och har inte studerats. Tidsförloppet av bronkiell angiogenes i råtta efter vänstra lungartären obstruktion har noggrant beskrivits i histologiska arbete Weibel 1. Utvidga detta arbete i råtta har vårt laboratorium fokuserat på både tillväxtfaktorer viktiga i denna process, liksom den fysiologiska resultatet av denna neovaskulatur i lungan. Resultaten visar CXC-kemokin Cinc-3 höjs tidigt efter ischemi och behandla råttor med en neutraliserande antikropp till CXCR2, dämpar receptorn för Cinc-3, angiogenes 13. Det nybildade bronkial vaskulatur 14 dagar efter debuten av pulmonell ischemi visade sig vara onormala med väsentligt ökad proteinpermeabilitet 15. Vänster lungfunktion var inte normal visning minskad sprida kapacitet och en minskning av lungvolym 15. Fastän neovaskulatur kan ha contributed till bevarandet av lungvävnad vid kronisk pulmonell ischemi, verkar det inte vara normalt och kan bidra till en varaktig minskning av lungfunktionen. Kanske en av de mest nyfikna aspekterna av denna modell gäller den rumsliga fördelningen av prolifererande blodkärl. Trots frisättningen av tillväxtfaktorer i den pulmonella parenkymet grund ischemi, härrör den neovaskulatur i relativt stora uppströms bronchial artärer. Den normala bronkial artären uppstår som en liten gren från aorta och invaderar luftvägarna trädet vid carina. Sålunda den mekanism genom vilken tillväxtfaktorer inducerar den inledande fasen av arteriogenes är inte klart. Vi föreslår att råttan med en vaskulär anatomi lika människor, ger en unik möjlighet att studera de mekanismer som är ansvariga för systemisk angiogenes vid pulmonell ischemi. Även fullständig obstruktion av vänster lungartären är en sällsynt företeelse i människor,ökad bronkiell vaskularitet verkar på liknande sätt framkallas hos patienter oavsett plats och storlek av lungartären obstruktion 16. Således, tillhandahåller vi en detaljerad beskrivning av den kirurgiska metoden att ligera den vänstra lungartären hos råttor och ett medel för att kvantifiera omfattningen av angiogenes.

<table border="1"><tbody><tr><td> Reagens: </td><td> Företag </td><td></td><td></td></tr><tr><td> buprenorfinhydroklorid, Puralube </td><td> Butler Schein </td><td></td><td></td></tr><tr><td> bupivicaine </td><td> APP Pharmaceuticals </td><td></td><td></td></tr><tr><td> Povidon-jod tampongpinnen </td><td> Dynarex Corporation </td><td></td><td></td></tr><tr><td> polypropylen sutur storlek 6-0, 3/8 cirkel bakåt skärande nål </td><td> Myco Medical </td><td></td><td></td></tr><tr><td> PE20 slang </td><td> Becton Dickinson </td><td></td><td></td></tr><tr><td> 15 im crimson polystyren fluorosfärer </td><td> Invitrogen </td><td></td><td></td></tr><tr><td> 1 ml Hamilton glasspruta </td><td> Hamilton Company </td><td> &lt;/ Td&gt; <td></td></tr><tr><td> Utrustning: </td><td></td><td></td><td></td></tr><tr><td> Genie Plus sprutpump </td><td> Kent Scientific </td><td></td><td></td></tr><tr><td> Fluorescensspektrofotometer </td><td> Digilab </td><td></td><td></td></tr><tr><td> Gnagare Fläkt Modell 683 </td><td> Harvard Apparatus </td><td></td><td></td></tr><tr><td></td><td></td><td></td><td> Tabell 1. Tabell över specifika reagenser och utrustning. </td></tr></tbody></table>

angiogenesis in the ischemic rat lung

Den vuxna lungan perfunderas av både systemiska bronkial artären och hela venöst återflöde som strömmar genom lungartärerna. I de flesta lung sjukdomar är det mindre systemisk kärlsystemet som svarar mot ett behov av ökad lung perfusion och visar robusta kärlnybildning. Pulmonell vaskulär ischemi inducerad av lungartären obstruktion har visat sig resultera i snabb systemisk arteriell angiogenes hos människa såväl som i flera djurmodeller. Även om den histologiska bedömningen av tidsförloppet för bronkial artär spridning i råttor omsorgsfullt beskrivs av Weibel 1, mekanismer som är ansvariga för denna organiserade tillväxt av nya fartyg är inte klart. Vi erbjuder kirurgisk detaljer framkalla vänstra lungartären ischemi hos råtta som leder till bronkial neovaskularisation. Kvantifiering av graden av angiogenes utgör ytterligare en utmaning på grund av närvaron av de två kärlbäddar i lungan. Metoderatt fastställa funktionell angiogenes utifrån märkta mikrosfärer injektioner ges.

Vaskulär rösterna: Resultat av effekterna av vänstra lungartären ischemi i råtta visas i Figur 1. Visas en metakrylat gjuten av bronkial kärlsystemet och den omfattande vaskulariseringen av vänster luftvägarna trädet 28 dagar efter LPAL. För att erhålla detta gjutna var den systemiska vaskulaturen injiceras med en blandning metakrylat (röd), retrograd in i nedåtgående aorta och trakea kanylerades och injicerades med en vit silikon baserat material. Denna vaskulära gjutna ger en anmärknin...

Watch this Scientific Journal Video about Angiogenesis in the Ischemic Rat Lung at JoVE.com

Angiogenesis in the Ischemic Rat Lung

Lungan perfunderas av både systemiska bronkial artären och lungartärerna. I de flesta lung patologier, är det mindre systemiska vaskulaturen som visar robust neovaskularisering. Upphörande av pulmonell blodflöde främjar rask bronkial angiogenes. Vi tillhandahåller kirurgiska detaljer inducera vänstra lungartären ischemi som främjar bronkial neovaskularisering.

Angiogenes i Ischemisk råttlunga

The  adult lung is perfused by both the systemic bronchial artery and the entire  venous return flowing through the pulmonary arteries. In most lung ...

Research

JoVE Journal

Medicine

Multi-modal Imaging of Angiogenesis in a Nude Rat Model of Breast Cancer Bone Metastasis Using Magnetic Resonance Imaging, Volumetric Computed Tomography and Ultrasound

Angiogenesis is an essential feature of cancer growth and metastasis formation. In bone metastasis, angiogenic factors are pivotal for tumor cell proliferation in the bone marrow cavity as well as for interaction of tumor and bone cells resulting in local bone destruction. Our aim was to develop a model of experimental bone metastasis that allows in vivo assessment of angiogenesis in skeletal lesions using non-invasive imaging techniques.
For this purpose, we injected 105 MDA-MB-231 human breast cancer cells into the superficial epigastric artery, which precludes the growth of metastases in body areas other than the respective hind leg1. Following 25-30 days after tumor cell inoculation, site-specific bone metastases develop, restricted to the distal femur, proximal tibia and proximal fibula1. Morphological and functional aspects of angiogenesis can be investigated longitudinally in bone metastases using magnetic resonance imaging (MRI), volumetric computed tomography (VCT) and ultrasound (US).
MRI displays morphologic information on the soft tissue part of bone metastases that is initially confined to the bone marrow cavity and subsequently exceeds cortical bone while progressing. Using dynamic contrast-enhanced MRI (DCE-MRI) functional data including regional blood volume, perfusion and vessel permeability can be obtained and quantified2-4. Bone destruction is captured in high resolution using morphological VCT imaging. Complementary to MRI findings, osteolytic lesions can be located adjacent to sites of intramedullary tumor growth. After contrast agent application, VCT angiography reveals the macrovessel architecture in bone metastases in high resolution, and DCE-VCT enables insight in the microcirculation of these lesions5,6. US is applicable to assess morphological and functional features from skeletal lesions due to local osteolysis of cortical bone. Using B-mode and Doppler techniques, structure and perfusion of the soft tissue metastases can be evaluated, respectively. DCE-US allows for real-time imaging of vascularization in bone metastases after injection of microbubbles7.
In conclusion, in a model of site-specific breast cancer bone metastases multi-modal imaging techniques including MRI, VCT and US offer complementary information on morphology and functional parameters of angiogenesis in these skeletal lesions.

In the pathogenesis of bone metastasis, angiogenesis is a crucial process and therefore represents a target for imaging and therapy. Here, we present a rat model of site-specific breast cancer bone metastasis and describe strategies to non-invasively image angiogenesis in vivo using magnetic resonance imaging, volumetric computed tomography and ultrasound.

Multi-modal Imaging av angiogenes i en Naken råtta modell av bröstcancer skelettmetastaser med magnetkamera, Volumetric datortomografi och ultraljud

Angiogenesis is an essential feature of cancer growth and metastasis formation. In bone metastasis, angiogenic factors are pivotal for tumor cell ...

Retinal Detachment Model in Rodents by Subretinal Injection of Sodium Hyaluronate

Subretinal injection of sodium hyaluronate is a widely accepted method of inducing retinal detachment (RD). However, the height and duration of RD or the occurrence of subretinal hemorrhage can affect photoreceptor cell death in the detached retina. Hence, it is advantageous to create reproducible RDs without subretinal hemorrhage for evaluating photoreceptor cell death. We modified a previously reported method to create bullous and persistent RDs in a reproducible location with rare occurrence of subretinal hemorrhage. The critical step of this modified method is the creation of a self-sealing scleral incision, which can prevent leakage of sodium hyaluronate after injection into the subretinal space. To make the self-sealing scleral incision, a scleral tunnel is created, followed by scleral penetration into the choroid with a 30 G needle. Although choroidal hemorrhage may occur during this step, astriction with a surgical spear reduces the rate of choroidal hemorrhage. This method allows a more reproducible and reliable model of photoreceptor death in diseases that involve RD such as rhegmatogenous RD, retinopathy of prematurity, diabetic retinopathy, central serous chorioretinopathy, and age-related macular degeneration (AMD).

Creating experimental retinal detachments with a reproducible and sustained height of detachment, and without subretinal hemorrhage, is important for studying the pathophysiology of photoreceptor cell loss in retinal disease and evaluating potential therapeutic interventions. Here, we report such a method in detail.

Näthinneavlossning modell i gnagare genom subretinal Injektion av natriumhyaluronat

Subretinal injection of sodium hyaluronate is a widely accepted method of inducing retinal detachment (RD). However, the height and duration of RD or the ...

Implantation of Fibrin Gel on Mouse Lung to Study Lung-specific Angiogenesis

Recent significant advances in stem cell research and bioengineering techniques have made great progress in utilizing biomaterials to regenerate and repair damage in simple tissues in the orthopedic and periodontal fields. However, attempts to regenerate the structures and functions of more complex three-dimensional (3D) organs such as lungs have not been very successful because the biological processes of organ regeneration have not been well explored. It is becoming clear that angiogenesis, the formation of new blood vessels, plays key roles in organ regeneration. Newly formed vasculatures not only deliver oxygen, nutrients and various cell components that are required for organ regeneration but also provide instructive signals to the regenerating local tissues. Therefore, to successfully regenerate lungs in an adult, it is necessary to recapitulate the lung-specific microenvironments in which angiogenesis drives regeneration of local lung tissues. Although conventional in vivo angiogenesis assays, such as subcutaneous implantation of extracellular matrix (ECM)-rich hydrogels (e.g., fibrin or collagen gels or Matrigel - ECM protein mixture secreted by Engelbreth-Holm-Swarm mouse sarcoma cells), are extensively utilized to explore the general mechanisms of angiogenesis, lung-specific angiogenesis has not been well characterized because methods for orthotopic implantation of biomaterials in the lung have not been well established. The goal of this protocol is to introduce a unique method to implant fibrin gel on the lung surface of living adult mouse, allowing for the successful recapitulation of host lung-derived angiogenesis inside the gel. This approach enables researchers to explore the mechanisms by which the lung-specific microenvironment controls angiogenesis and alveolar regeneration in both normal and pathological conditions. Since implanted biomaterials release and supply physical and chemical signals to adjacent lung tissues, implantation of these biomaterials on diseased lung can potentially normalize the adjacent diseased tissues, enabling researchers to develop new therapeutic approaches for various types of lung diseases.

Recapitulation of the organ-specific microenvironment, which stimulates local angiogenesis, is indispensable for successful regeneration of damaged tissues. This report demonstrates a novel method to implant fibrin gels on the lung surface of living mouse in order to explore how the lung-specific microenvironment modulates angiogenesis and alveolar regeneration in adult mouse.

Implantation av fibringel på Mus Lung att studera Lung specifika angiogenes

Recent significant advances in stem cell research and bioengineering techniques have made great progress in utilizing biomaterials to regenerate and ...

Method of Isolated Ex Vivo Lung Perfusion in a Rat Model: Lessons Learned from Developing a Rat EVLP Program

The number of acceptable donor lungs available for lung transplantation is severely limited due to poor quality. Ex-Vivo Lung Perfusion (EVLP) has allowed lung transplantation in humans to become more readily available by enabling the ability to assess organs and expand the donor pool. As this technology expands and improves, the ability to potentially evaluate and improve the quality of substandard lungs prior to transplant is a critical need. In order to more rigorously evaluate these approaches, a reproducible animal model needs to be established that would allow for testing of improved techniques and management of the donated lungs as well as to the lung-transplant recipient. In addition, an EVLP animal model of associated pathologies, e.g., ventilation induced lung injury (VILI), would provide a novel method to evaluate treatments for these pathologies. Here, we describe the development of a rat EVLP lung program and refinements to this method that allow for a reproducible model for future expansion. We also describe the application of this EVLP system to model VILI in rat lungs. The goal is to provide the research community with key information and &#8220;pearls of wisdom&#8221;/techniques that arose from trial and error and are critical to establishing an EVLP system that is robust and reproducible.

Method of Isolated Ex Vivo Lung Perfusion in a Rat Model: Lessons Learned from Developing a Rat EVLP Program

Ex-Vivo Lung Perfusion (EVLP) has allowed lung transplantation in humans to become more readily available by enabling the ability to assess organs and expand the donor pool. Here, we describe the development of a rat EVLP program and refinements that allow for a reproducible model for future expansion.

Metod för Isolerad<em&gt; Ex vivo</em&gt; Lung Perfusion i en råttmodell: Lärdomar från Utveckla en Rat EVLP Program

The number of acceptable donor lungs available for lung transplantation is severely limited due to poor quality. Ex-Vivo Lung Perfusion (EVLP) has allowed ...

Rat Model of Photochemically-Induced Posterior Ischemic Optic Neuropathy

Posterior Ischemic optic neuropathy (PION) is a sight-devastating disease in clinical practice. However, its pathogenesis and natural history have&#160;remained poorly understood. Recently, we developed a reliable, reproducible animal model of PION and tested the treatment effect of some neurotrophic factors in this model1. The purpose of this video is to demonstrate our photochemically induced model of posterior ischemic optic neuropathy, and to evaluate its effects with retrograde labeling of retinal ganglion cells. Following surgical exposure of the posterior optic nerve, a photosensitizing dye, erythrosin B, is intravenously injected and a laser beam is focused onto the optic nerve surface. Photochemical interaction of erythrosin B and the laser during irradiation damages the vascular endothelium, prompting microvascular occlusion mediated by platelet thrombosis and edematous compression. The resulting ischemic injury yields a gradual but pronounced retinal ganglion cell dieback, owing to a loss of axonal input - a remote, injury-induced and clinically relevant outcome. Thus, this model provides a novel platform to study the pathophysiologic course of PION,&#160;and can be further optimized for testing therapeutic approaches for optic neuropathies as well as other CNS ischemic diseases.

The goal of this protocol is to photochemically induce ischemic injury to the posterior optic nerve in rat. This model is critical to studies of the pathophysiology of posterior ischemic optic neuropathy, and therapeutic approaches for this and other optic neuropathies, as well as of other CNS ischemic diseases.

Rat Model av fotokemiskt inducerad posterior ischemisk optikusneuropati

Posterior Ischemic optic neuropathy (PION) is a sight-devastating disease in clinical practice. However, its pathogenesis and natural history ...

Rat Heterotopic Abdominal Heart/Single-lung Transplantation in a Volume-loaded Configuration

Herein, we describe a novel technique for heterotopic abdominal heart-lung transplantation (HAHLT) in rats. The configuration of the transplant graft involves anastomosis of donor inferior vena cava (IVC) to recipient IVC, and donor ascending aorta (Ao) to recipient abdominal Ao. The right upper and middle lung lobes are preserved and function as conduits for blood flow from right heart to left heart.
There are several advantages to using this technique, and it lends itself to a broad range of applications. Because the graft is transplanted in a configuration that allows for dyamic volume-loading, cardiac function may be directly assessed in vivo. The use of pressure-volume conductance catheters permits characterization of load-dependent and load-independent hemodynamic parameters. The graft may be converted to a loaded configuration by applying a clamp to the recipient&#8217;s infra-hepatic IVC. We describe modified surgical techniques for both donor and recipient operations, and an ideal myocardial protection strategy. Depending on the experimental aim, this model may be adapted for use in both acute and chronic studies of graft function, immunologic status, and variable ventricular loading conditions. The conducting airways to the transplanted lung are preserved, and allow for acute lung re-ventilation. This facilitates analysis of the effects of the mixed venous and arterial blood providing coronary perfusion to the graft.
A limitation of this model is its technical complexity. There is a significant learning curve for new operators, who should ideally be mentored in the technique. A surgical training background is advantageous for those wishing to apply this model. Despite its complexity, we aim to present the model in a clear and easily applicable format. Because of the physiologic similarity of this model to orthotopic transplantation, and its broad range of study applications, the effort invested in learning the technique is likely to be worthwhile.

We describe a novel technique for heterotopic abdominal heart-lung transplantation (HAHLT) in rats. The transplant configuration results in a partially loaded graft circulation, allowing direct functional assessment. This model may be employed for acute or chronic studies of function and immunologic status of the transplanted graft.

Rat Heterotopisk buken hjärta / Single-lungtransplantation i en volym belastad konfiguration

Herein, we describe a novel technique for heterotopic abdominal heart-lung transplantation (HAHLT) in rats. The configuration of the transplant graft ...

Demonstration of the Rat Ischemic Skin Wound Model

The propensity for chronic wounds in humans increases with ageing, disease conditions such as diabetes and impaired cardiovascular function, and unrelieved pressure due to immobility. Animal models have been developed that attempt to mimic these conditions for the purpose of furthering our understanding of the complexity of chronic wounds. The model described herein is a rat ischemic skin flap model that permits a prolonged reduction of blood flow resulting in wounds that become ischemic and resemble a chronic wound phenotype (reduced vascularization, increased inflammation and delayed wound closure). It consists of a bipedicled dorsal flap with 2 ischemic wounds placed centrally and 2 non-ischemic wounds lateral to the flap as controls. A novel addition to this ischemic skin flap model is the placement of a silicone sheet beneath the flap that functions as a barrier and a splint to prevent revascularization and reduce contraction as the wounds heal. Despite the debate of using rats for wound healing studies due to their quite distinct anatomic and physiologic differences compared to humans (i.e., the presence of a panniculus carnosus muscle, short life-span, increased number of hair follicles, and their ability to heal infected wounds) the modifications employed in this model make it a valuable alternative to previously developed ischemic skin flap models.

The rat, due to its size, availability, and rather docile behavior, has been utilized as a research model for many years. The goal of this protocol is to utilize the rat as an ischemic skin wound healing model to provide valuable insight into the pathophysiology of chronic wounds.

Demonstration av Rat Ischemisk hudsår Modell

The propensity for chronic wounds in humans increases with ageing, disease conditions such as diabetes and impaired cardiovascular function, and ...

A Rat Lung Transplantation Model of Warm Ischemia/Reperfusion Injury: Optimizations to Improve Outcomes

From our experience with rat lung transplantation, we have found several areas for improvement. Information in the existing literature regarding methods for choosing appropriate cuff sizes for the pulmonary vein (PV), pulmonary artery (PA), or bronchus (Br) are varied, thus making the determination of proper cuff size during rat lung transplantation an exercise of trial and error. By standardizing the cuffing technique to use the smallest effective cuff appropriate for the size of the vessel or bronchus, one can make the transplantation procedure safer, faster, and more successful. Since diameters of the PV, PA, and Br are related to the body weight of the rat, we present a strategy to choosing an appropriate size using a weight-based guide. Since lung volume is also related to body weight, we recommend that this relationship should also be considered when choosing the proper volume of air for donor lung inflation during warm ischemia as well as for the proper volume of PBS to be instilled during bronchoalveolar lavage (BAL) fluid collection. We also describe methods for 4th intercostal space dissection, wound closure, and sample collection from both the native and transplanted lobes.

Here, we present optimizations to a rat lung transplantation model that serve to improve outcomes. We provide a size guide for cuffs based on body weight, a measurement strategy to ascertain the 4th intercostal space, and methods of wound closure and BAL (bronchoalveolar lavage) fluid and tissue collection.

En råttlungtransplantationsmodell av varm ischemi / reperfusionsskada: optimeringar för att förbättra resultaten

From our experience with rat lung transplantation, we have found several areas for improvement. Information in the existing literature regarding methods ...

Securing the Rat in the Rat Jacket for Electroacupuncture

Wear a pair of gloves before proceeding to fit and secure the rat in the custom made rat jacket. Then using one hand hold the rat jacket's middle and back portion on the table. Using the other hand, gently hold the rat by its tail to pick it up from the feeding cage and place it into the jacket as the rat moves forward into the jacket and its head reaches the headgear point.Using both hands, carefully pull out its left and right upper limbs from the holes in the jacket. Securely wrap the tying ropes from the opening end of the jacket around the rat's trunk, and tie them tightly at the opposite end to adequately restrain its upper limbs. Tie the rope loose enough to prevent hypoxia or local limb ischemia, and tight enough to prevent the rat's escape.In a similar manner, secure its lower limbs.

Säkra råttan i råttjackan för elektroakupunktur

<meta charset="utf8"></head><body>Realtidsövervakning av cellulär dynamik vid lungtransplantation hos mus

Intravital Two-Photon Microscopy of the Transplanted Mouse Lung

Complications after lung transplantation are largely related to the host immune system responding to the graft. Such immune responses are regulated by crosstalk between donor and recipient cells. A better understanding of these processes relies on the use of preclinical animal models and is aided by an ability to study intra-graft immune cell trafficking in real-time. Intravital two-photon microscopy can be used to image tissues and organs for depths up to several hundred microns with minimal photodamage, which affords a great advantage over single-photon confocal microscopy. Selective use of transgenic mice with promoter-specific fluorescent protein expression and/or adoptive transfer of fluorescent dye-labeled cells during intravital two-photon microscopy allows for the dynamic study of single cells within their physiologic environment. Our group has developed a technique to stabilize mouse lungs, which has enabled us to image cellular dynamics in na&#239;ve lungs and orthotopically transplanted pulmonary grafts. This technique allows for detailed assessment of cellular behavior within the vasculature and in the interstitium, as well as for examination of interactions between various cell populations. This procedure can be readily learned and adapted to study immune mechanisms that regulate inflammatory and tolerogenic responses after lung transplantation. It can also be expanded to the study of other pathogenic pulmonary conditions.

<meta charset="utf8"></head><body>Författare i fokus: Främja immunologi vid lungtransplantation genom intravital avbildning

Here, we present a protocol to intravitally image the transplanted mouse left lung using two-photon microscopy. This represents a valuable tool for studying cellular dynamics and interactions in real-time following murine lung transplantation.

Intravital tvåfotonmikroskopi av den transplanterade muslungan

Complications after lung transplantation are largely related to the host immune system responding to the graft. Such immune responses are regulated by ...