Ce travail a été soutenu en partie par une subvention du NIH (RO1 HL098228) de CKB.

NOTE: Toutes les procédures d&#39;animaux ont été approuvés par le Comité institutionnel Hôpital soin et l&#39;utilisation des animaux de la Nationwide Children. 1. Fabrication de greffe <ol><li> Ajoutez la solution de ε-caprolactone et de L-lactide copolymère P (LA / CL) en ajoutant 100 mg de P (LA / CL) dans 2 ml de dioxane sous une hotte de laboratoire. Placer la solution sur un vortex et mélanger pendant 1-1,5 heures pour dissoudre complètement. </li><li> Dans le même temps, retirer une feuille de l&#39;acide glycolique (PGA) estime du congélateur et découpez plusieurs sections 5 x 8 mm. Également couper la pointe d&#39;un pi pipette 0,1-10 juste au-dessus du filtre. </li><li> Insérez une aiguille 19 G (1,5 de longueur) dans l&#39;extrémité distale d&#39;une pointe de pipette et envelopper le PGA estimé autour de l&#39;aiguille à l&#39;aide de micro pince. </li><li> Poussez délicatement le feutre à l&#39;extrémité distale de la pointe de la pipette, où la lumière est plus droit que la partie proximale, en utilisant une aiguille 18 G émoussée, tandis que l&#39;aiguille 19 G est inséré. </li><li> Pipette40 pl P (CL / LA) solution dans la pointe de la pipette à partir du haut. Saturer la PGA sentir avec la solution. Puis pousser les bulles d&#39;air à l&#39;aide d&#39;un distributeur de pipette. Répétez cette procédure si nécessaire. </li><li> La place des greffes dans un tube de 50 ml et le placer dans un congélateur à -80 ° C pendant 20 min. Assurez-vous que la tête des aiguilles face à la baisse. </li><li> Transférer le tube dans un lyophilisateur et le vide pendant 24 heures. Assurez-vous d&#39;ouvrir le couvercle du tube d&#39;avoir le flux d&#39;air. </li><li> Sortez les greffes et les retirer des aiguilles. Couper les deux extrémités de la greffe en laissant une section ~ 5 mm et les remettre sur les aiguilles à maintenir leur forme. Gardez les greffons dans un dessiccateur. </li><li> Placez l&#39;échafaud sous la lumière UV dans un biosécurité capot O / N avant l&#39;ensemencement des cellules. </li></ol> 2. Moelle osseuse mononucléaires récolte des cellules et isolement <ol><li> Euthanasier les souris avec une surdose de kétamine / xylazine (kétamine, 200 mg / kg et de xylazine, 20 mg / kg). </li><li> Supprimer os (fémur uned tibias) de 3 souris pour 10 implantations de greffe et les placer dans une boîte de Pétri avec 10 cc RPMI. Couper les deux extrémités des os et de la moelle osseuse de chasse à l&#39;aide d&#39;une seringue avec une aiguille 25 G dans une nouvelle boîte de Pétri avec 3 cc RPMI. Recueillir os solution RPMI osseuse et dans un tube de 15 cc et laver la boîte de Pétri avec 2 cc supplémentaires RPMI pour recueillir le reste de BM. </li><li> Prendre l&#39;échantillon (5 à 10 pi) et compter les cellules en utilisant un compteur de cellules automatisé ou hémocytomètre. Notez le résultat. </li><li> Mettre 5 cc Ficoll dans un tube de 15 cm de centrifugeuse et ajouter os solution RPMI osseuse et. Ajouter la solution très lentement pour éviter qu&#39;il se mélange avec le Ficoll. </li><li> Centrifuger à 528 g pendant 30 min avec &quot;pas de frein&quot; à 24 ° C. </li><li> Enlever la couche supérieure de rose. Recueillir le moyen clair couche Figure 1, qui est la couche MNC, et diluer avec du PBS 1:1. </li><li> Centrifuger la solution diluée de MNC à 528 g pendant 10 min à 24 ° C. </li><li> Enlever le surnageant et diluth le culot avec 5 ml de PBS. </li><li> Centrifuger la solution de granulés à 528 g pendant 10 min à 24 ° C. </li><li> Retirer le surnageant. On dilue le culot avec le volume approprié de milieu RPMI (~ 200 ul). </li><li> Prélever un échantillon de pl 5-10 et compter les cellules en utilisant un compteur de cellules automatisé ou hématimètre. Notez le résultat. Répétez la cellule compter une fois de plus et de calculer le nombre de cellules moyenne. </li><li> Diluer la concentration des cellules à l&#39;aide d&#39;un million cellules/10 ul de RPMI. </li></ol> 3. Portable semis <ol><li> Échafaudage pré-imbibé en ajoutant 5 ul RPMI luminale pendant 5 min, puis retirez RPMI. </li><li> Ajouter 10 ul cellules nucléaires de moelle osseuse provenant de mono dans RPMI de l&#39;étape 2.12 de lumière d&#39;échafaudage et attendre 10 min pour permettre aux cellules de se fixer sur l&#39;échafaud. </li><li> Couper une aiguille 19 G de 1 cm de longueur et mettre l&#39;aiguille dans la lumière de l&#39;échafaudage pour garder la forme de l&#39;échafaud. Placer l&#39;échantillon dans une plaque de 24 puits. &lt;/ Li&gt; <li> Ajouter 1000 pi de RPMI à chaque puits et incuber O / N dans un incubateur. </li></ol> 4. Implantation du greffon <ol><li> Autoclave tous les outils chirurgicaux avant la chirurgie: 1x ciseaux fins, micro pince 3x, micro pinces vasculaires 2x, 1x pince forceps applicables, titulaire de la micro-aiguille 1x, ciseaux à ressort 1x, 1x enrouleur. </li><li> 6-8 semaines femelle C57BL / 6 sont utilisés comme vasculaires receveurs de greffe de l&#39;ingénierie tissulaire. Débranchez la souris de sa cage et le peser, alors anesthésier par une injection intrapéritonéale dans le quadrant inférieur droit de l&#39;abdomen avec un cocktail de kétamine / xylazine (kétamine, 100 mg / kg et de xylazine, 10 mg / kg). Le kétoprofène (5 mg / kg, IP) est utilisé comme analgésique pré-anesthésie. </li><li> Vérifiez le niveau de sédation par pincement conte, puis couper les poils abdominale. Lubrifier les yeux avec pommade ophtalmique stérile, et placer la souris dans une position de décubitus dorsal sur un tapis. Désinfecter l&#39;abdomen avec des tampons de bétadine et alcool. Cover la souris avec un champ stérile et d&#39;exposer la zone d&#39;incision seulement. </li><li> Faire une laparotomie médiane incision du dessous de la xiphoïde à la région sus-pubienne, et insérer un écarteur auto-statique. Envelopper les intestins dans une solution saline humidifié gaze. Définir carrément l&#39;aorte et la veine cave. </li><li> Placez deux clamps vasculaires micro sur les deux côtés proximal et distal de l&#39;aorte et la veine cave, puis carrément séparer l&#39;aorte de la veine cave transect de la veine cave. Si nécessaire, ligaturer les branches de l&#39;aorte abdominale avec un 10-0 sutures monofilament les aiguilles coniques. </li><li> Implanter une veine cave inférieure avec interposition greffe extrémité proximale et distale de mettre fin à l&#39;aide d&#39;un anastomoses 10-0 suture stérile. Couper le greffon, habituellement de 1 à 2 mm, en fonction de l&#39;anatomie de la souris. Fixer la greffe avec une maille sur les deux extrémités proximale et distale et commencer à suturer de façon continue avec 4-5 points de suture à partir de l&#39;autre côté de la greffe. Après avoir terminé la face avant, retournez les pinces et les greffesde l&#39;autre côté et de suturer le côté arrière de la greffe. Pendant l&#39;implantation, rincer la greffe avec une solution d&#39;héparine fréquemment pour prévenir la thrombose aiguë. </li><li> Retirer la pince proximale et contrôler l&#39;hémorragie en appliquant un agent hémostatique résorbable stérile d&#39;actualité. Lorsque l&#39;hémorragie s&#39;arrête complètement, retirez la pince distale et contrôler l&#39;hémorragie de la même façon. Assurez-vous que le sang coule à travers le greffon. </li><li> Fermez la musculature abdominale et la peau en deux couches à l&#39;aide d&#39;un monofil 6-0 polyamide noir avec aiguille fileté inclus. </li><li> Injecter 0,5 ml de solution saline sous-cutanée et placer la souris dans une cage de récupération sur un coussin chauffant jusqu&#39;à ce que la souris est entièrement mobile. Lors de la récupération, le retour de la souris dans une nouvelle cage avec une literie de papier. Donner des médicaments de la douleur (ibuprofène, 30 mg / kg, eau potable) pendant 48 heures. </li></ol>

<ol>
	<li>Heart Association, A. m. e. r. i. c. a. n. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Heart+Disease+and+Stroke+Statistics&#8212;2012+Update.">Heart Disease and Stroke Statistics&#8212;2012 Update.</a> Circulation. 125, (2012).</li><li>Shinoka, 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=Creation+Of+Viable+Pulmonary+Artery+Autografts+Through+Tissue+Engineering.">Creation Of Viable Pulmonary Artery Autografts Through Tissue Engineering.</a> The Journal of Thoracic and Cardiovascular Surgery. 115, 536-546 (1998).</li><li>Hibino, 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=Late-term+results+of+tissue-engineered+vascular+grafts+in+humans.">Late-term results of tissue-engineered vascular grafts in humans.</a> The Journal of Thoracic and Cardiovascular Surgery. 139, 431-436 (2010).</li><li>Shin'oka, 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=Midterm+clinical+result+of+tissue-engineered+vascular+autografts+seeded+with+autologous+bone+marrow+cells.">Midterm clinical result of tissue-engineered vascular autografts seeded with autologous bone marrow cells.</a> The Journal of Thoracic and Cardiovascular Surgery. 129, 1330-1338 (2005).</li><li>Brennan, M. P., 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=Tissue-engineered+vascular+grafts+demonstrate+evidence+of+growth+and+development+when+implanted+in+a+juvenile+animal+model.">Tissue-engineered vascular grafts demonstrate evidence of growth and development when implanted in a juvenile animal model.</a> Ann Surg. 248, 370-377 (2008).</li><li>Roh, J. D., 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=Construction+of+an+autologous+tissue-engineered+venous+conduit+from+bone+marrow-derived+vascular+cells:+optimization+of+cell+harvest+and+seeding+techniques.">Construction of an autologous tissue-engineered venous conduit from bone marrow-derived vascular cells: optimization of cell harvest and seeding techniques.</a> Journal of Pediatric Surgery. 42, 198-202 (2007).</li><li>Hibino, 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=Tissue-engineered+vascular+grafts+form+neovessels+that+arise+from+regeneration+of+the+adjacent+blood+vessel.">Tissue-engineered vascular grafts form neovessels that arise from regeneration of the adjacent blood vessel.</a> The FASEB Journal. 25, 2731-2739 (2011).</li><li>Hibino, 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=A+critical+role+for+macrophages+in+neovessel+formation+and+the+development+of+stenosis+in+tissue-engineered+vascular+grafts.">A critical role for macrophages in neovessel formation and the development of stenosis in tissue-engineered vascular grafts.</a> The FASEB Journal. 25, 4253-4263 (2011).</li><li>Naito, Y., 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=Characterization+of+the+Natural+History+of+Extracellular+Matrix+Production+in+Tissue-Engineered+Vascular+Grafts+during+Neovessel+Formation.">Characterization of the Natural History of Extracellular Matrix Production in Tissue-Engineered Vascular Grafts during Neovessel Formation.</a> Cells Tissues Organs. 195, 60-72 (2012).</li><li>Naito, Y., 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=Beyond+Burst+Pressure:+Initial+Evaluation+of+the+Natural+History+of+the+Biaxial+Mechanical+Properties+of+Tissue+Engineered+Vascular+Grafts+in+the+Venous+Circulation+Using+a+Murine+Model.">Beyond Burst Pressure: Initial Evaluation of the Natural History of the Biaxial Mechanical Properties of Tissue Engineered Vascular Grafts in the Venous Circulation Using a Murine Model.</a> Tissue Eng. Part A. 20, (2013).</li><li>Mirensky, T. L., 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=Tissue-engineered+vascular+grafts:+does+cell+seeding+matter.">Tissue-engineered vascular grafts: does cell seeding matter.</a> Journal of Pediatric Surgery. 45, 1299-1305 (2010).</li><li>Roh, J. D., 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=Tissue-engineered+vascular+grafts+transform+into+mature+blood+vessels+via+an+inflammation-mediated+process+of+vascular+remodeling.">Tissue-engineered vascular grafts transform into mature blood vessels via an inflammation-mediated process of vascular remodeling.</a> Proceedings of the National Academy of Sciences. 107, 4669-4674 (2010).</li><li>Mirensky, T. L., 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=Tissue-engineered+arterial+grafts:+long-term+results+after+implantation+in+a+small+animal+model.">Tissue-engineered arterial grafts: long-term results after implantation in a small animal model.</a> Journal of Pediatric Surgery. 44, 1127-1133 (2009).</li><li>Lee, Y. U., Naito, Y., Kurobe, H., Breuer, C. K., Humphrey, J. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Biaxial+mechanical+properties+of+the+inferior+vena+cava+in+C57BL/6+and+CB-17+SCID/bg+mice.">Biaxial mechanical properties of the inferior vena cava in C57BL/6 and CB-17 SCID/bg mice.</a> Journal of Biomechanics. 46, 2277-2282 (2013).</li></ol>

Les auteurs n&#39;ont rien à révéler.

Le modèle de souris de TEVG est un outil précieux pour étudier les mécanismes cellulaires et moléculaires de la formation néo-tissu et le développement de la sténose. La tête de série BM-MNC a été montré dans les deux images histologiques et SEM des cellules ensemencées sur la greffe 11. Efficacité cellule de semis a également été démontré en utilisant un test d&#39;ADN 7. L&#39;utilisation de ce système modèle, nous avons montré que l&#39;ensemencement de cellules réduit l&...

Les malformations cardiaques congénitales sont des affections graves qui touchent près de 8% des naissances vivantes aux États-Unis. Environ 25% de ces enfants atteints de malformations cardiaques congénitales ou 2,4 pour 1 000 naissances vivantes, nécessitent un traitement invasif dans la première année de leur vie 1. Le traitement le plus efficace pour une maladie cardiaque congénitale est la chirurgie reconstructive. Malheureusement, les complications résultant de l&#39;utilisation de conduits vasculaires actuellement disponibles sont la cause la plus importante de la morbidité et de la mortalité post-opératoire. Pour résoudre ce problème, nous avons développé les premiers ingénierie tissulaire greffons vasculaires (TEVGs) pour une utilisation clinique 2. TEVGs ont été construits à partir de tubes de polyester biodégradables ensemencées avec des cellules dérivées de l&#39;mononucléaires autologues de moelle osseuse (BM-MNC) et implantés comme des conduits veineux en chirurgie cardiaque congénitale. Les résultats ont montré d&#39;excellents taux de perméabilité à 1-3 ans de suivi, mais avec une incidence significative de la sténose <sjusqu&#39;à&gt; 3,4. Il était clair qu&#39;une meilleure compréhension de la formation de néo-tissu vasculaire et le mécanisme sous-jacent au développement de TEVG sténose était nécessaire. Afin de mieux comprendre le développement de TEVGs et le mécanisme de développement d&#39;une sténose, un modèle ovin a été créé 5,6. Dans ce modèle, les TEVGs transformées avec succès dans les vaisseaux vivants et étaient similaires dans les deux morphologie et la fonction des veines indigènes. Cette utilisation d&#39;un modèle de grand animal était une première étape importante dans la fourniture de l&#39;information pré-clinique qui a facilité l&#39;utilisation clinique de TEVGs. Cependant, la pleine compréhension des mécanismes cellulaires et moléculaires de la formation néo-tissu vasculaire dans TEVGs utilisant de grandes modèles animaux est limitée en raison des limitations dans la caractérisation moléculaire des phénotypes cellulaires vasculaires dues au manque d&#39;espèces outils moléculaires spécifiques. Pour combler ces lacunes, un modèle murin de TEVGs a été développé en raison de l&#39;avancement rapide de la génétique de la souris et leur vaste molecular caractérisation avec l&#39;avantage supplémentaire d&#39;une échelle de temps plus courte. Le murin IVC modèle d&#39;interposition fidèlement récapitulé le processus de néovaisseaux formation qui se produit dans les grands animaux et les humains, mais sur un parcours de temps beaucoup plus court 6-9. Ici, un protocole détaillé pour la fabrication de la greffe à petite échelle en utilisant des échafaudages biodégradables, BM-MNC récolte et l&#39;isolement, BM-MNC semis sur l&#39;échafaudage, et implantation du greffon dans un modèle murin ont été décrits.

<table border="0" cellpadding="0" cellspacing="0" style="width:616px;" width="615">
	<colgroup>
		<col />
		<col />
		<col />
		<col />
	</colgroup>
	<tbody>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Name</td>
			<td style="width:139px;">Company</td>
			<td style="width:133px;">Catalog Number</td>
			<td style="width:168px;">Comments</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">polyglycolic acid (PGA) felt</td>
			<td>Biomedical Structures</td>
			<td></td>
			<td>Custome ordered</td>
		</tr>
		<tr height="45">
			<td height="45" style="height:45px;width:176px;">&#603;-caprolactone and L- 
			lactide copolymer P(LA/CL)&#160;</td>
			<td>Gunze Inc.</td>
			<td></td>
			<td>Custome ordered</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Pipet tip, 0.1-10 &#956;l&#160;</td>
			<td>Fisher Sientific</td>
			<td>02-707-456</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Lyophilizer&#160;</td>
			<td>Labconco</td>
			<td>7070020</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">RPMI medium 1604</td>
			<td>gibco</td>
			<td>11875-093</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Petri dish</td>
			<td>BD</td>
			<td>353003</td>
			<td></td>
		</tr>
		<tr height="34">
			<td height="34" style="height:34px;width:176px;">24 well plate</td>
			<td>Corning</td>
			<td>3526</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">15cc tube&#160;</td>
			<td>BD</td>
			<td>352096</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Ficoll</td>
			<td>Sigma</td>
			<td>10831-100ml</td>
			<td>Also called &#39;Histopaque&#39;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">DPBS</td>
			<td>gibco</td>
			<td>14190-144</td>
			<td></td>
		</tr>
		<tr height="39">
			<td height="39" style="height:39px;width:176px;">Littauer Bone Cutter 4.5&#34; Straight</td>
			<td>Roboz</td>
			<td>RS-8480</td>
			<td>For BM harvesting</td>
		</tr>
		<tr height="27">
			<td height="27" style="height:27px;width:176px;">Forceps 4.5&#34;</td>
			<td>Roboz</td>
			<td>RS-8120</td>
			<td>For BM harvesting</td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;width:176px;">Scissors 4.5&#34;</td>
			<td>Roboz</td>
			<td>RS-5912</td>
			<td>For BM harvesting</td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:176px;">Microscope</td>
			<td style="width:139px;">Leica</td>
			<td style="width:133px;">M80</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;width:176px;">C57BL/6J (H-2b), Female</td>
			<td style="width:139px;">Jackson Laboratories&#160;</td>
			<td style="width:133px;">664</td>
			<td style="width:168px;">8-12 weeks</td>
		</tr>
		<tr height="39">
			<td height="39" style="height:39px;width:176px;">Ketamine Hydrochloride Injection</td>
			<td style="width:139px;">Hospira Inc.</td>
			<td style="width:133px;">NDC 0409-2053</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;width:176px;">Xylazine Sterile Solution</td>
			<td style="width:139px;">Akorn Inc.</td>
			<td style="width:133px;">NADA# 139-236</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="36">
			<td height="36" style="height:36px;width:176px;">ketoprofen</td>
			<td style="width:139px;">Fort Dodge Animal Health</td>
			<td style="width:133px;">NDC 0856-4396-01</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="36">
			<td height="36" style="height:36px;width:176px;">Ibuprofen</td>
			<td style="width:139px;">PrecisionDose</td>
			<td style="width:133px;">NDC 68094-494-59</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="37">
			<td height="37" style="height:37px;width:176px;">Heparin Sodium</td>
			<td style="width:139px;">Sagent Pharmaceticals</td>
			<td style="width:133px;">NDC 25021-400</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="39">
			<td height="39" style="height:39px;width:176px;">Saline solution (Sterile 0.9% Sodium Chloride)</td>
			<td style="width:139px;">Hospira Inc.</td>
			<td style="width:133px;">NDC 0409-0138-22</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="39">
			<td height="39" style="height:39px;width:176px;">0.9% Sodium Chloride Injection</td>
			<td style="width:139px;">Hospira Inc.</td>
			<td style="width:133px;">NDC 0409-4888-10</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:176px;">Petrolatum Ophthalmic Ointment</td>
			<td style="width:139px;">Dechra Veterinary Products</td>
			<td style="width:133px;">NDC 17033-211-38</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;width:176px;">Iodine Prep Pads</td>
			<td style="width:139px;">Triad Disposables, Inc.</td>
			<td style="width:133px;">NDC 50730-3201-1</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;width:176px;">Alcohol Prep Pads</td>
			<td style="width:139px;">McKesson Corp.</td>
			<td style="width:133px;">NDC 68599-5805-1</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;width:176px;">Cotton tipped applicators</td>
			<td style="width:139px;">Fisher Sientific</td>
			<td style="width:133px;">23-400-118</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:176px;">Fine Scissor</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">14028-10</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;width:176px;">Micro-Adson Forcep</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">11018-12</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:176px;">Clamp Applying Forcep</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">00072-14</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:176px;">S&#38;T Vascular Clamp</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">00396-01</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:176px;">Spring Scissors</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">15008-08</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Colibri Retractors</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">17000-04</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Dumont #5 Forcep</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">11251-20&#160;</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Dumont #7 - Fine Forceps</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">11274-20</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Dumont #5/45 Forceps</td>
			<td style="width:139px;">FST</td>
			<td style="width:133px;">11251-35</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Tish Needle Holder/Forceps</td>
			<td style="width:139px;">Micrins</td>
			<td style="width:133px;">MI1540</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:176px;">Black Polyamide Monofilament Suture, 10-0</td>
			<td style="width:139px;">AROSurgical Instruments Corporation</td>
			<td style="width:133px;">TI638402</td>
			<td style="width:168px;">For sutureing the graft</td>
		</tr>
		<tr height="37">
			<td height="37" style="height:37px;width:176px;">Black Polyamide Monofilament Suture, 6-0</td>
			<td style="width:139px;">AROSurgical Instruments&#160;</td>
			<td style="width:133px;">SN-1956</td>
			<td style="width:168px;">For musculature and skin closure</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Non-Woven Songes</td>
			<td style="width:139px;">McKesson Corp.</td>
			<td style="width:133px;">94442000</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Absorbable hemostat</td>
			<td style="width:139px;">Ethicon</td>
			<td style="width:133px;">1961</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:176px;">1 ml Syringe</td>
			<td style="width:139px;">BD</td>
			<td style="width:133px;">309659</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:176px;">3 ml Syringe</td>
			<td style="width:139px;">BD</td>
			<td style="width:133px;">309657</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="24">
			<td height="24" style="height:24px;width:176px;">10 ml Syringe</td>
			<td style="width:139px;">BD</td>
			<td style="width:133px;">309604</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">18G 1 1/2 in, Needle</td>
			<td style="width:139px;">BD</td>
			<td style="width:133px;">305190</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">25G 1 in., Needle</td>
			<td style="width:139px;">BD</td>
			<td style="width:133px;">305125</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">30G 1 in., Needle</td>
			<td style="width:139px;">BD</td>
			<td style="width:133px;">305106</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;width:176px;">Warm Water Recircultor</td>
			<td style="width:139px;">Gaymar</td>
			<td style="width:133px;">TP-700</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="23">
			<td height="23" style="height:23px;width:176px;">Warming Pad</td>
			<td style="width:139px;">Gaymar</td>
			<td style="width:133px;">TP-22G</td>
			<td style="width:168px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:176px;">Trimmer</td>
			<td style="width:139px;">Wahl</td>
			<td style="width:133px;">9854-500</td>
			<td style="width:168px;"></td>
		</tr>
	</tbody>
</table>

implantation of inferior vena cava interposition graft in mouse model

Échafaudages biodégradables ensemencées avec des cellules mononucléées de la moelle osseuse (BMC) sont souvent utilisés pour la chirurgie reconstructive pour traiter les anomalies cardiaques congénitales. Les résultats cliniques à long terme ont montré d&#39;excellents taux de perméabilité, cependant, avec une incidence significative de la sténose. Pour étudier les mécanismes cellulaires et moléculaires de la formation néo-tissu vasculaire et de prévenir le développement de la sténose dans l&#39;ingénierie tissulaire greffons vasculaires (TEVGs), nous avons développé un modèle de souris de la greffe d&#39;environ 1 mm de diamètre intérieur. Tout d&#39;abord, les TEVGs ont été assemblés à partir d&#39;échafaudages tubulaires biodégradables fabriqués à partir d&#39;un non-tissé d&#39;acide glycolique sentir maille enduit de copolymère ε-caprolactone et L-lactide. Les échafaudages ont ensuite été placés dans un lyophilisateur, l&#39;aspirateur pendant 24 heures, et stockés dans un dessiccateur jusqu&#39;à ce que l&#39;ensemencement des cellules. Deuxièmement, la moelle osseuse a été recueillie à partir de souris donneuses et des cellules mononucléées ont été isolées par centrifugation en gradient de densité. Troisièmement, environ un million de cellules ont étéensemencées sur un échafaudage et incubées O / N. Enfin, les échafaudages graines ont ensuite été implantés en sous-rénaux greffes veine cave d&#39;interposition dans C57BL / 6. Les greffons implantés démontré une excellente perméabilité (&gt; 90%) sans preuve de complications thrombo-emboliques ou la formation d&#39;anévrisme. Ce modèle murin nous aidera à comprendre et quantifier les mécanismes cellulaires et moléculaires de la formation néo-tissu dans le TEVG.

Un schéma de TEVG implantation est représenté sur la figure 1. Moelle osseuse a été récoltée à partir d&#39;une souris donneuse et des cellules mononucléaires ont été isolées par centrifugation de densité, puis ensemencées sur un échafaudage biodégradable. Les échafaudages ensemencées ont été incubées O / N et implantés à une souris receveuse comme une cave greffe d&#39;interposition de la veine cave inférieure. La figure 2 illustre l...

Watch this Scientific Journal Video about Implantation of Inferior Vena Cava Interposition Graft in Mouse Model at JoVE.com

Implantation of Inferior Vena Cava Interposition Graft in Mouse Model

Pour améliorer notre connaissance de la formation néo-tissu cellulaire et moléculaire, un modèle murin de la TEVG a été récemment mis au point. Les greffons ont été implantés en sous-rénaux des greffes de la veine cave d&#39;interposition de souris C57BL / 6. Ce modèle permet d&#39;obtenir des résultats similaires à ceux obtenus dans notre étude clinique, mais sur un temps bien sûr beaucoup plus courte.

Implantation de veine cave inférieure interposition de greffe en modèle de souris

Biodegradable scaffolds seeded with bone marrow mononuclear cells (BMCs) are often used for reconstructive surgery to treat congenital cardiac anomalies. ...

implantation-of-inferior-vena-cava-interposition-graft-in-mouse-model

Research

JoVE Journal

Medicine

11.8K vues.  Nationwide Children's Hospital.  Pour améliorer notre connaissance de la formation néo-tissu cellulaire et moléculaire, un modèle murin de la TEVG a été récemment mis au point. Les greffons ont été implantés en sous-rénaux des greffes de la veine cave d'interposition de souris C57BL / 6. Ce modèle permet d'obtenir des résultats similaires à ceux obtenus dans notre étude clinique, mais sur un temps bien sûr beaucoup plus courte. 

Vidéo: Implantation of Inferior Vena Cava Interposition Graft in Mouse Model

Electrolytic Inferior Vena Cava Model (EIM) of Venous Thrombosis

Animal models serve a vital role in deep venous thrombosis (DVT) research in order to study thrombus formation, thrombus resolution and to test potential therapeutic compounds (1). New compounds to be utilized in the treatment and prevention of DVT are currently being developed. The delivery of potential therapeutic antagonist compounds to an affected thrombosed vein has been problematic. In the context of therapeutic applications, a model that uses partial stasis and consistently generates thrombi within a major vein has been recently established. The Electrolytic Inferior vena cava Model (EIM) is mouse model of DVT that permits thrombus formation in the presence of continuous blood flow. This model allows therapeutic agents to be in contact with the thrombus in a dynamic fashion, and is more sensitive than other models of DVT (1). In addition, this thrombosis model closely simulates clinical situations of thrombus formation and is ideal to study venous endothelial cell activation, leukocyte migration, venous thrombogenesis, and to test therapeutic applications (1). The EIM model is technically simple, easily reproducible, creates consistent thrombi sizes and allows for a large sample (i.e. thrombus and vein wall) which is required for analytical purposes.

Electrolytic Inferior Vena Cava Model EIM of Venous Thrombosis

The electrolytic induction of endothelial activation to the internal surface of the Inferior Vena Cava results in venous type thrombus formation due to endothelial activation and partial blood stasis, two components of Virchow's triad.

Électrolytique veine cave inférieure Modèle (EIM) de la thrombose veineuse

Animal models serve a vital role in deep venous thrombosis (DVT) research in order to study thrombus formation, thrombus resolution and to test potential ...

Recherche

Médecine

Mouse Complete Stasis Model of Inferior Vena Cava Thrombosis

Venous thromboembolism (VTE) includes both deep vein thrombosis (DVT) and pulmonary embolism (PE). In the United States (U.S.), the high morbidity and mortality rates make VTE a serious health concern 1-2. After heart disease and stroke, VTE is the third most common vascular disease 3. In the U.S. alone, there is an estimated 900,000 people affected each year, with 300,000 deaths occurring annually 3. A reliable in vivo animal model to study the mechanisms of this disease is necessary.
The advantages of using the mouse complete stasis model of inferior vena cava thrombosis are several. The mouse model allows for the administration of very small volumes of limited availability test agents, reducing costs dramatically. Most promising is the potential for mice with gene knockouts that allow specific inflammatory and coagulation factor functions to be delineated. Current molecular assays allow for the quantitation of vein wall, thrombus, whole blood, and plasma for assays. However, a major concern involving this model is the operative size constraints and the friability of the vessels. Also, due to the small IVC sample weight (mean 0.005 grams) it is necessary to increase animal numbers for accurate statistical analysis for tissue, thrombus, and blood assays such as real-time polymerase chain reaction (RT-PCR), western blot, enzyme-linked immunosorbent (ELISA), zymography, vein wall and thrombus cellular analysis, and whole blood and plasma assays 4-8.
The major disadvantage with the stasis model is that the lack of blood flow inhibits the maximal effect of administered systemic therapeutic agents on the thrombus and vein wall.

The mouse complete stasis model of inferior vena cava thrombosis yields quantifiable amounts of vein wall tissue and thrombus. It has proven useful for evaluating interactions between the vein wall and the occlusive thrombus and in assessing the progression from acute to chronic inflammation.

Modèle de souris complète stase de la veine cave inférieure thrombose

Venous thromboembolism (VTE) includes both deep vein thrombosis (DVT) and pulmonary embolism (PE).  In the United States (U.S.), the high morbidity and ...

Training a Sophisticated Microsurgical Technique: Interposition of External Jugular Vein Graft in the Common Carotid Artery in Rats

Neointimal hyperplasia is one the primary causes of stenosis in arterialized veins that are of great importance in arterial coronary bypass surgery, in peripheral arterial bypass surgery as well as in arteriovenous fistulas.1-5 The experimental procedure of vein graft interposition in the common carotid artery by using the cuff-technique has been applied in several research projects to examine the aetiology of neointimal hyperplasia and therapeutic options to address it. 6-8 The cuff prevents vessel anastomotic remodeling and induces turbulence within the graft and thereby the development of neointimal hyperplasia.
Using the superior caval vein graft is an established small-animal model for venous arterialization experiment.9-11 This current protocol refers to an established jugular vein graft interposition technique first described by Zou et al., 9 as well as others.12-14 Nevertheless, these cited small animal protocols are complicated.
To simplify the procedure and to minimize the number of experimental animals needed, a detailed operation protocol by video training is presented. This video should help the novice surgeon to learn both the cuff-technique and the vein graft interposition. Hereby, the right external jugular vein was grafted in cuff-technique in the common carotid artery of 21 female Sprague Dawley rats categorized in three equal groups that were sacrificed on day 21, 42 and 84, respectively. Notably, no donor animals were needed, because auto-transplantations were performed. The survival rate was 100 % at the time point of sacrifice. In addition, the graft patency rate was 60 % for the first 10 operated animals and 82 % for the remaining 11 animals. The blood flow at the time of sacrifice was 8&plusmn;3 ml/min. In conclusion, this surgical protocol considerably simplifies, optimizes and standardizes this complicated procedure. It gives novice surgeons easy, step-by-step instruction, explaining possible pitfalls, thereby helping them to gain expertise fast and avoid useless sacrifice of experimental animals.

Neointimal hyperplasia is the primary cause of stenosis in arterialized veins. We propose a new protocol whereby the right external jugular vein is grafted using the cuff technique in the common carotid artery of Sprague Dawley rats. The survival rate was 100 % at the time point of sacrifice.

Former une technique microchirurgicale sophistiquée: Interposition de greffe veine jugulaire externe dans l&#39;artère carotide commune chez les rats

Neointimal hyperplasia is one the primary causes of stenosis in arterialized veins that are of great importance in arterial coronary bypass surgery, in ...

Vein Interposition Model: A Suitable Model to Study Bypass Graft Patency

Bypass grafting is an established treatment method for coronary artery disease. Graft patency continues to be the Achilles heel of saphenous vein grafts. Research models for bypass graft failure are essential for a better understanding of pathobiological and pathophysiological processes during graft patency loss. Large animal models, such as pigs or sheep, resemble human anatomical structures but require special facilities and equipment. This video describes a rat vein interposition model to investigate vein graft patency loss. Rats are inexpensive and easy to handle. Compared to mouse models, the convenient size of rats permits better operability and enables a sufficient amount of material to be obtained for further diverse analysis. In brief, the inferior epigastric vein of a donor rat is harvested and used to replace a segment of the femoral artery. Anastomosis is conducted via single stitches and sealed with fibrin glue. Graft patency can be monitored non-invasively using duplex sonography. Myointimal hyperplasia, which is the main cause for graft patency loss, develops progressively over time and can be calculated from histological cross sections.

This video demonstrates a model to study the development of myointimal hyperplasia after venous interposition surgery in rats.

Vein Interposition Modèle: un modèle approprié pour étudier Bypass Graft Patency

Bypass grafting is an established treatment method for coronary artery disease. Graft patency continues to be the Achilles heel of saphenous vein grafts. ...

Patch Angioplasty in the Rat Aorta or Inferior Vena Cava

Pericardial patches are commonly used in vascular surgery to close vessels. To facilitate studies of the neointimal hyperplasia that forms on the patch, we developed a rat model of patch angioplasty that can be used in either a vein or an artery, creating a patch venoplasty or a patch arterioplasty, respectively. Technical aspects of this model are discussed. The infra-renal IVC or aorta are dissected and then clamped proximally and distally. A 3 mm venotomy or arteriotomy is performed in the infrarenal inferior vena cava or aorta of 6 to 8 week-old Wistar rats. A bovine pericardial patch (3 mm x 1.5 mm x 0.6 mm) is then used to close the site using a 10-0 nylon suture. Compared to arterial patches, venous patches show increased neointimal thickness on postoperative day 7. This novel model of pericardial patch angioplasty can be used to examine neointimal hyperplasia on vascular biomaterials, as well as to compare the differences between the arterial and venous environments.

We have established a model of pericardial patch angioplasty that can be used in either small-diameter veins or arteries. This model can be used to compare venous and arterial neointimal hyperplasia formation.

Patch Angioplastie dans le Aorte Rat ou Veine cave inférieure

Pericardial patches are commonly used in vascular surgery to close vessels. To facilitate studies of the neointimal hyperplasia that forms on the patch, ...

A Rat Model of Orthotopic Liver Transplantation Using a Novel Magnetic Anastomosis Technique for Suprahepatic Vena Cava Reconstruction

The rat model of orthotopic liver transplantation (OLT) is essential for transplant research. It is a very sophisticated animal model and requires a steep learning curve. The introduction of the cuff technique for anastomosis of the portal vein (PV) and infrahepatic vena cava (IHVC) has significantly simplified the transplant procedure in rats. However, due to the short anterior wall of the recipients' suprahepatic vena cava (SHVC), the cuff technique is very difficult to use for the reconstruction of the SHVC. Most researchers in this field still use the hand-suture technique for SHVC reconstruction, which makes it the bottleneck step in rat orthotopic liver transplantation. The magnetic anastomosis technique (i.e., magnamosis) is a method of connecting two vessels using the attractive force between two magnets. Our recent study has shown that the magnetic anastomosis technique is superior to the hand-suture technique for SHVC reconstruction in rats. In this article, we show a step-by-step protocol for SHVC reconstruction in rats using the novel magnetic anastomosis technique. In this model, the reconstruction of the PV and IHVC was performed by the standard cuff technique, while the reconstruction of the bile duct (BD) was performed by a stent technique. The hepatic re-arterialization was not performed. The magnetic anastomosis technique made SHVC reconstruction much easier and significantly shortened the anphepatic phase. After a reasonable learning curve, even researchers without advanced microsurgical skills can produce reliable and reproducible results using this rat model of OLT.

The reconstruction of the suprahepatic vena cava (SHVC) remains a difficult step in rat orthotopic liver transplantation. In this article, we show a step-by-step protocol for SHVC reconstruction in rats using a novel magnetic anastomosis technique.

Un modèle de Rat de la Orthotopic Transplantation hépatique en utilisant une Technique nouvelle anastomose magnétique pour la Reconstruction de veine sus-hépatique

The rat model of orthotopic liver transplantation (OLT) is essential for transplant research. It is a very sophisticated animal model and requires a steep ...

Isometric Contractility Measurement of the Mouse Mesenteric Artery Using Wire Myography

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and drugs. It is widely used in many studies on the physiological functions of vascular smooth muscle, the pathogenesis of vascular diseases such as hypertension, and the development of smooth muscle relaxant drugs. The mouse is a widely used model animal with a large pool of disease models and genetically modified strains. We introduced this method to measure the isometric contraction of mouse mesenteric artery in detail. A 1.4-mm segment of mouse mesenteric resistance artery was isolated and mounted on a myograph chamber by passing two steel wires through its lumen. After equilibration and normalization steps, the vessel segment was potentiated by a high-K+ solution twice prior to the contraction assay. As an example of the application of this method in drug development, we measured the relaxant effect of a novel natural substance, neoliensinine, isolated from a Chinese herb, embryos of the lotus seed (Nelumbo nucifera Gaertn.) on mouse mesenteric arteries. The vessel segments mounted on the myograph chamber were stimulated with a high-K+ solution. When the force tension reached a stable sustained phase, cumulative doses of neoliensinine were added to the chamber. We found that neoliensinine had a dose-dependent relaxant effect on smooth muscle contraction, thus suggesting that it bears potential activity against hypertension. In addition, as the vessel segment can survive at least 4 hours after mounting and maintain contractility induced by the high-K+ solution for many times, we suggest that the wire myograph system may be used for the time-consuming process of drug screening.

The wire myograph technique is used to investigate vascular smooth muscle functions and screen new drugs. We report a detailed protocol for measuring the isometric contractility of the mouse mesenteric artery and for screening new relaxants of vascular smooth muscle.

Mesure de la contractilité isométrique de l’artère mésentérique de souris à l’aide de fil myographie

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and ...

A Rodent Model of The Ross Operation: Syngeneic Pulmonary Artery Graft Implantation in A Systemic Position

The Ross operation for aortic valve disease has regained new interest due to its outstanding long-term results. Nonetheless, when employed as freestanding root replacement, the possible dilation of the pulmonary autograft and subsequent aortic regurgitation is described. Several animal models have been proposed. However, these are usually limited to ex-vivo models or in-vivo experiments with relatively expensive large animal models. In this study, we sought to establish a rodent model of pulmonary artery graft (PAG) implantation in a systemic position. A total of 39 adult Lewis rats were included. Immediately after euthanasia, the pulmonary root was harvested from a donor animal (n=17). Syngeneic recipient (n=17) and sham-operated (n=5) rats were sedated and ventilated. In the recipient group, the PAG was implanted with an end-to-end anastomosis in infra-renal abdominal aortic position. Sham-operated rats underwent only transection and re-anastomosis of the aorta. Animals were followed with serial ultrasound studies for two months and post-mortem histological analysis. The median PAG diameter in the native position was 3.20 mm (IQR=3.18-3.23). At follow-up, the median diameter of the PAG was 4.03 mm (IQR=3.74-4.13) at 1 week, 4.07 mm (IQR=3.80-4.28) at 1 month, and 4.27 mm (IQR=3.90-4.35) at 2 months (p&lt;0.01). Peak systolic velocity was 220.07 mm/s (IQR=210.43-246.41) at 1 week, 430.88 mm/s (IQR=375.28-495.56) at 1 month, and 373.68 mm/s (IQR=305.78-429.81) at 2 months (p=0.02) and did not differ from the sham-operated group at the end of the experiment (p=0.5). Histological analysis did not show any sign of endothelial thrombosis. This study showed that rodent models may allow for the evaluation of the long-term adaptation of the pulmonary root to a high-pressure system. A systemically placed syngeneic PAG implantation represents a simple and feasible platform for the development and evaluation of novel surgical techniques and drug therapies to further improve the outcomes of the Ross operation.

We demonstrate how to establish a murine model of pulmonary root implantation into the descending aorta to simulate the Ross procedure. This model enables the medium/long-term evaluation of pulmonary autograft remodeling in a systemic position, representing the basis of developing therapeutic strategies to promote its adaptation.

Un modèle de rongeur de l’opération de Ross: implantation d’une greffe d’artère pulmonaire syngénique dans une position systémique

The Ross operation for aortic valve disease has regained new interest due to its outstanding long-term results. Nonetheless, when employed as freestanding ...

Image Acquisition Method for the Sonographic Assessment of the Inferior Vena Cava

Over the past several decades, clinicians have incorporated several applications of diagnostic point-of-care ultrasound (POCUS) into medical decision-making. Among the applications of POCUS, imaging the inferior vena cava (IVC) is practiced by a wide variety of specialties, such as nephrology, emergency medicine, internal medicine, critical care, anesthesiology, pulmonology, and cardiology. Although each specialty uses IVC data in slightly different ways, most medical specialties, at minimum, attempt to use IVC data to make predictions about intravascular volume status. While the relationship between IVC sonographic data and intravascular volume status is complex and highly context-dependent, all clinicians should collect the sonographic data in standardized ways to ensure repeatability. This paper describes standardized IVC image acquisition including patient positioning, transducer selection, probe placement, image optimization, and the pitfalls and limitations of IVC sonographic imaging.&#160;This paper also describes the commonly performed anterior IVC long-axis view and three other views of the IVC that can each provide helpful diagnostic information when the anterior long-axis view is difficult to obtain or interpret.

Point-of-care ultrasound evaluation of the inferior vena cava (IVC) is commonly utilized to identify, among other things, the volume status. Imaging should be performed systematically to ensure repeatability. This manuscript reviews the methods and pitfalls of sonographic IVC examination.

Méthode d’acquisition d’images pour l’évaluation échographique de la veine cave inférieure

Over the past several decades, clinicians have incorporated several applications of diagnostic point-of-care ultrasound (POCUS) into medical ...

Stratégies pour une anastomose vasculaire efficace dans la transplantation hépatique de souris

Vascular Reconstruction with the Cuff Technique in Mouse Orthotopic Liver Transplantation

Mouse orthotopic liver transplantation is an effective methodology for investigating the underlying mechanisms of liver ischemia and reperfusion injury. However, the technical challenges pose a barrier to utilizing this valuable experimental model and passing on these skills to the next generation. The most challenging aspect of this procedure is vascular reconstruction, including the portal vein (PV), infrahepatic inferior vena cava (IHIVC), and suprahepatic inferior vena cava. The use of plastic cuffs, rather than sutures, allows for smoother PV and IHIVC reconstruction. Vessels are reconstructed by attaching a cuff made from an intravenous catheter to the tip of the graft vessel and interposing the cuff into the recipient vessel. The two most crucial aspects are properly visualizing the inner lumen of the vessel and avoiding the use of excessive force. Our aim is to provide a technical overview of vascular reconstructions using the cuff technique in recipient surgery. These technical tips for the cuff technique are expected to help microsurgeons facilitate vascular reconstruction and advance their research.

Pleins feux sur l’auteur : Explorer l’ischémie froide et les lésions de reperfusion chaude dans la transplantation de stéatose hépatique

This protocol provides technical information for vessel reconstruction using the cuff technique in mouse orthotopic liver transplantation.

Reconstruction vasculaire avec la technique du brassard dans la transplantation hépatique orthotopique de souris

Mouse orthotopic liver transplantation is an effective methodology for investigating the underlying mechanisms of liver ischemia and reperfusion injury. ...