Name: transplantation of pulmonary valve using a mouse model of heterotopic heart transplantation
Uploaded: 2014-07-23T15:00:00.000+00:00
Duration: 10 min 56 s
Description: Watch this Scientific Journal Video about Transplantation of Pulmonary Valve Using a Mouse Model of Heterotopic Heart Transplantation at JoVE.com

Bu çalışma CKB için NIH (RO1 HL098228) bir hibe, kısmen desteklendi.

Not: Bütün hayvan prosedürleri Nationwide Çocuk Hastanesi Kurumsal Hayvan Bakım ve Kullanım Kurulu tarafından kabul edildi. Kalp Vana Donör Fare 1. Pulmoner Kalp Vana Hasat <ol><li> Ameliyat öncesi tüm cerrahi aletler otoklava sokun: ince makas, 3x mikro forseps, 2x mikro vasküler kelepçeler, 1x kelepçe uygulayarak forseps, 1x mikro iğne tutucu, 1x yaylı makas, 1x ekartörünü 1x. </li><li> A 6-8 haftalık dişi C57BL / 6 fare, akciğer kalp kapak verici olarak kullanılmaktadır. Kafesinden fareyi çıkarın ve bunu tartmak, sonra bir ketamin / ksilazin kokteyl (ketamin, 200 mg / kg ve ksilizin, 20 mg / kg, IP) doz aşımı ile euthanize. </li><li> Göğüs alanı Klip ve bir yastık üzerinde bir dorsal recumbence pozisyonda fare yerleştirin. Sonra torakotomi yapmak. , Kalp maruz sağ atrium üzerinde küçük bir kesim yapmak ve buz soğuk tuzlu su ile sol ventrikül serpmek. </li><li> Açık açık artan a gelen pulmoner arter (PA) teşrihOrta. Pulmoner arter 2 mm manşet ile birlikte pulmoner kapak (PV) kesip. Kalbin kalan atınız. </li><li> Soğuk heparin ve tuzlu su çözeltisi (100 birim / ml) &#39;de PV saklayın. Not: PV verici kalp nakli önce iki saat boyunca çözelti içinde tutulabilir. </li></ol> 2.. Donör Kalp Hazırlık <ol><li> A 6-8 haftalık dişi C57BL / 6 fare kalp verici olarak kullanılır. Kafesinden fareyi çıkarın ve bunu tartmak, sonra bir ketamin / ksilazin kokteyl (ketamin, 200 mg / kg ve ksilizin, 20 mg / kg, IP) doz aşımı ile euthanize. Bu, bir terminal işlemdir. </li><li> Göğüs alanı Klip ve bir yastık üzerinde bir dorsal recumbence pozisyonda fare yerleştirin. Sonra torakotomi yapmak. Açık açık kalp, inferior vena kava (IVC), vena kava (SVK), çıkan aort, PA, ve pulmoner ven ayrı. Buz soğuk steril serum fizyolojik ile IVC serpmek. </li><li> IVC, SVC, ve daha sonra üstün kesti 6-0 ipek sütür ile pulmoner ven ligasyonubitişik harfler. </li><li> 2 mm manşeti ile aorta ve PA kesti. </li><li> PV kesip atın. </li></ol> Donör Kalp üzerine 3. Kalp Kapağı Nakli <ol><li> Hemen adım 2.5 sonra, donör kalbine 1.5 adım kalp kapakçığı yerleştirin ve kalp kapakçığı yönlendirin. </li><li> Konik iğne 10-0 monofilament dikiş kullanarak vananın sağ tarafında bir dikiş ile PV elde edin ve PV diğer taraftan 5-6 stiches sürekli dikiş başlar. </li><li> Ön tarafı bitirdikten sonra, yatay kalp döndürmek ve donör kalbin üzerine PV arka tarafını dikmek başlar. </li><li> Soğuk bir steril heparin / tuzlu su çözeltisi içinde kalp saklayın. Not: Donor kalp alıcı fareye implantasyondan önce iki saat boyunca çözelti içinde tutulabilir. </li></ol> Bir Alıcı Fare 4. Heterotopik Kalp Nakli <ol><li> Bir 6-8 haftalık dişi C57BL / 6 fare bir rezidüsünden olarak kullanılmıştırpient. Kafesinden fareyi çıkarın ve sonra ketamin / ksilazin kokteyl (ketamin, 100 mg / kg ve ksilizin 10 mg / kg) ile anestezi, tartılır. Ketoprofen (5 mg / kg) Anestezi öncesi analjesik olarak kullanılır. </li><li> Kısma kuyruk tarafından sedasyon düzeyini kontrol ettikten sonra, karın ve göğüs saç klibi. Steril Oftalmik merhem ile gözleri yağlayın ve bir yastık üzerinde bir dorsal recumbence pozisyonda fare yerleştirin. Betadine ve alkol pedleri ile karın dezenfekte edin. Daha sonra steril bir örtü ile fare kapak ve sadece kesik alana maruz kalmaktadır. </li><li> Suprapubik bölgeye xiphoid aşağıdan bir orta hat laparotomi kesi yapmak ve kendini tutma ekartörünü yerleştirin. Tuzlu çözelti ile nemlendirilmiş gazlı bez bağırsakları sarın. Açık açık infrarenal aorta ve vena kava tanımlar. </li><li> Kan dolaşımını dizginlemek aorta ve IVC etrafında proksimal ve distalde iki 6-0 ipek sütür koyun. </li><li> Abdominal aorta sağ tarafındaki donör kalbi yerleştirin ve steril GAÜ ile örtünze. Tuzlu su ile nemlendirmek. </li><li> Bir 30 G iğne kullanılarak abdominal aortta aortotomy yapın ve verici aort boyutuna makas ile açıklığı uzanır. </li><li> Konik iğne steril 10-0 monofilament sütür kullanarak bir tarafında uçtan anastomoz gerçekleştirin. Abdominal aortta açıklığın yakın ucunda bir tane dikiş ile verici aort elde edin ve abdominal aortun uzak ucundan 4-5 stiches sürekli dikiş başlar. </li><li> , Sol tarafa kalp çevirmek serum vermek gazlı bez ile örtün ve abdominal aorta uzak ucundan 4-5 stiches ile sürekli dikiş başlar. </li><li> Bir 30 G iğne kullanılarak IVC bir venotomi yapın ve verici pulmoner arter boyutuna açıklığı uzanır. </li><li> Konik iğne steril 10-0 monofilament sütür kullanarak yan anastomoz sona gerçekleştirin. IVC içinde açıklığın yakın ucunda bir tane dikiş ile verici PA elde edin ve 4-5 stiches sürekli dikiş başlarinferior vena kava uzak ucu. Aort şekilde, çünkü bu sefer, emin donörün PA sol duvarının sütür IVC iç olduğundan emin olun. </li><li> Heparin ve tuzlu su çözeltisi (100 birim / ml) ile IVC lümen yıkayın. Uzak ucuna sürekli olarak onları dikiş ile PA verici ve alıcı IVC sağ duvar kapatın. </li><li> Distal ligatürün çıkarın ve bir topikal emilebilir steril hemostat ajanı uygulayarak kanamayı kontrol. Kanama tamamen durduğunda, proksimal sütür kaldırmak ve kanama aynı şekilde kontrol. </li><li> Bağırsakları İade ve 6-0 siyah poliamid monofilament sütür kullanılarak iki kat karın kas ve deri kapatın. </li><li> 0.5 ml serum fizyolojik subkutan enjekte edilir ve fare tamamen mobil kadar bir ısınma pad üzerinde bir kurtarma kafes fare yerleştirin. Kurtarma üzerine, kağıt yatak ile yeni kafesine fareyi dönmek. 48 saat boyunca ağrı ilaç (ibuprofen, 30 mg / kg, içme suyu) ver. Dotamamen iyileşti kadar diğer hayvanların şirkete ameliyat geçirmiş bir hayvan döndürmez. </li></ol>

<ol>
	<li>Polito, A., 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=Increased+morbidity+and+mortality+in+very+preterm+VLBW+infants+with+congenital+heart+disease.">Increased morbidity and mortality in very preterm VLBW infants with congenital heart disease.</a> Intens Care Med. 39, 1104-1112 (2013).</li><li>Wren, C., Reinhardt, Z., Khawaja, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Twenty+year+trends+in+diagnosis+of+life+threatening+neonatal+cardiovascular+malformations.">Twenty year trends in diagnosis of life threatening neonatal cardiovascular malformations.</a> Arch Dis Child Fetal. 93, F33-F35 (2008).</li><li>Vacanti, J. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Beyond+transplantation+Third+annual+Samuel+Jason+Mixter+lecture.">Beyond transplantation Third annual Samuel Jason Mixter lecture.</a> Archives of surgery. 123, 545-549 (1960).</li><li>Tudorache, I., 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=Orthotopic+replacement+of+aortic+heart+valves+with+tissue-engineered+grafts.">Orthotopic replacement of aortic heart valves with tissue-engineered grafts.</a> Tissue engineering Part A. 19, 1686-1694 (2013).</li><li>van Geldorp, M. W., 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=Patient+outcome+after+aortic+valve+replacement+with+a+mechanical+or+biological+prosthesis+weighing+lifetime+anticoagulant+related+event+risk+against+reoperation+risk.">Patient outcome after aortic valve replacement with a mechanical or biological prosthesis weighing lifetime anticoagulant related event risk against reoperation risk.</a> The Journal of thoracic and cardiovascular surgery. 137, 881-886 (2009).</li><li>El Oakley, R., Kleine, P., Bach, D. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Choice+of+prosthetic+heart+valve+in+today's+practice.">Choice of prosthetic heart valve in today's practice.</a> Circulation. 117, 253-256 (2008).</li><li>Quinn, R. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Animal+Models+for+Bench+to+Bedside+Translation+of+Regenerative+Cardiac+Constructs.">Animal Models for Bench to Bedside Translation of Regenerative Cardiac Constructs.</a> Progress in Pediatric cardiology. 35, (2013).</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=Tissue+engineering+heart+valves+valve+leaflet+replacement+study+in+a+lamb+model.">Tissue engineering heart valves valve leaflet replacement study in a lamb model.</a> The Annals of thoracic surgery. 60, S513-S516 (1995).</li><li>Sodian, R., 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+engineering+of+heart+valves+in+vitro+experiences.">Tissue engineering of heart valves in vitro experiences.</a> The Annals of thoracic surgery. 70, 140-144 (2000).</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=Tissue+engineered+heart+valves.+Autologous+valve+leaflet+replacement+study+in+a+lamb+model.">Tissue engineered heart valves. Autologous valve leaflet replacement study in a lamb model.</a> Circulation. 94, II164-II168 (1996).</li><li>Sodian, R., 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=Evaluation+of+biodegradable+three+dimensional+matrices+for+tissue+engineering+of+heart+valves.">Evaluation of biodegradable three dimensional matrices for tissue engineering of heart valves.</a> ASAIO journal (American Society for Artificial Internal Organs. 46, 107-110 (1992).</li><li>Sodian, R., 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=Early+in+vivo+experience+with+tissue-engineered+trileaflet+heart+valves).">Early in vivo experience with tissue-engineered trileaflet heart valves).</a> Circulation. 102, III22-III29 (2000).</li></ol>

Biz ifşa hiçbir şey yok.

Bu prosedürün ölüm oranı çoğunlukla alıcı abdominal aorta donör aort PV nakli site ve anastomoz de kanama neden oldu% 20, yakındır. Pek çok durumda, ölüm oranı önemli ölçüde 48 saat ameliyat sonrasında azalır. Sağkalım fareler implante PV yoluyla güçlü kalp atışlarını ve kan akışını gösterdi. Bütün bu süreç, deneyimli bir mikro cerrah için dört saat sürer. Bu tekniği ana kabaca 250 fareler alacaktır. Heterotopik kalp nakli donör kalbe PV implantasyon kıyasla öne nispeten d...

Konjenital kalp kusurları batı dünyası 1,2 bebek ölümlerinin önde gelen nedenlerinden biridir. Bunlar arasında, pulmoner kapak darlığı ve aort kapağı kusurları sık görülen şeklidir 3 vardır. Kalp kapak değiştirme ameliyatı rekonstrüktif cerrahi rutin bir seçimdir; Ancak, darlık ve kireçlenmeye kalp kapakçığı ve antikoagülan ömür boyu bağımlılık dahil komplikasyonlar, kronik hastalık ve ölüm 4-7 önemli bir kaynağıdır. Ayrıca, büyüme potansiyeli eksikliği daha genç hastalarda, 4,8,9 ve mortaliteyi artırır, revizyon ameliyatları gerektirir. Biyolojik olarak parçalanabilir bir sentetik kalp kapakçığı 8 üzerine büyüme potansiyeli, Shinoka et al. Tohumlanmış otolog hücreler olan fonksiyonel değiştirme kalp valfi geliştirmek için bir girişim olarak. Büyüme potansiyeli olan bir yapı gibi yerli kalp kapakçığı dönüştü sentetik valfal. Ön büyük hayvan çalışmaları fonksiyonel bir kalp valfini 10 oluşturmak için bu yöntemi kullanarak fizibilite göstermiştir. Bununla birlikte, uzun süreli implantasyon çalışmaları nedeniyle, kalp valfinin daralması ile sonuçlanan valf neotissue ilerleyici kalınlaşmasına kötü dayanıklılığı göstermiştir. Sodian ikinci çalışma ark. Shinoka yöntem kullanılır, ancak sonuçta daha fizyolojik bir profil oluşturmak 9,11,12 doku mühendisliği vananın biyomekanik özelliklerini veren biyolojik olarak parçalanabilir bir elastomer ile PGA matris yerini aldı. In vivo çalışmada, implantasyon başarısı rağmen, birleşik endotel hücre astar bu iskele 12&#39;nin uzun sürede başarısını sınırı düşüren oluşmuş değildi. Rasyonel geliştirilmiş ikinci nesil sentetik kalp kapağı tasarlamak amacıyla, kalp kapakçığı nakli bir fare modeli hücresel ve moleküler mekanizmaları underlyin araştırmak için kuruldug neotissue oluşumu, valf kalınlaşma ve darlık gelişimi. Fare modelleri diğer türlerde 7 hazır değildir transgenikleri dahil olmak üzere moleküler belirteçlerin geniş bir dizi, sunuyoruz. Bu kalp kapakçığı nakli modelinde, ex vivo singenik pulmoner kalp kapak replasmanı ilk gerçekleştirilmiştir; ve daha sonra implante edilen kalp kapağı ile kalp bir mikrocerrahi tekniği kullanılarak bir konakçıya genetik olarak özdeş heterotopically implante edildi. Bu model, kardiyopulmoner baypas için gerek kalmadan kalp kapağı değişimi sağlar. Bu yazıda, bir kalp kapakçığı hasat ayrıntılı bir açıklama, donör kalp preparatları, kalp kapakçığı nakli ve heterotopik kalp nakli tarif edilir. Sonuçlar alıcı atışı bağımsız olduğu donör kalp, sürekli bir kalp atışı gösterdi. Implante pulmoner valf kan akışı, atımlı bir dalga fazlası ile yüksek frekanslı ultrason sistemi kullanılarak ölçüldüppler.

<table><tbody><tr><td>DPBS</td><td>Gibco</td><td>14190-144</td><td></td></tr><tr><td>Microscope</td><td>Leica</td><td>M80</td><td></td></tr><tr><td>C57BL/6J (H-2b), Female</td><td>Jackson Laboratories</td><td>664</td><td>8-12 weeks</td></tr><tr><td>Ketamine Hydrochloride Injection</td><td>Hospira Inc.</td><td>NDC 0409-2053</td><td></td></tr><tr><td>Xylazine Sterile Solution</td><td>Akorn Inc.</td><td>NADA# 139-236</td><td></td></tr><tr><td>Ketoprofen</td><td>Fort Dodge Animal Health</td><td>NDC 0856-4396-01</td><td></td></tr><tr><td>Ibuprofen</td><td>PrecisionDose</td><td>NDC 68094-494-59</td><td></td></tr><tr><td>Heparin Sodium</td><td>Sagent Pharmaceticals</td><td>NDC 25021-400</td><td></td></tr><tr><td>Saline solution (Sterile 0.9% sodium chloride)</td><td>Hospira Inc.</td><td>NDC 0409-0138-22</td><td></td></tr><tr><td>0.9% Sodium chloride Injection</td><td>Hospira Inc.</td><td>NDC 0409-4888-10</td><td></td></tr><tr><td>Petrolatum Ophthalmic Ointment</td><td>Dechra Veterinary Products</td><td>NDC 17033-211-38</td><td></td></tr><tr><td>Iodine Prep Pads</td><td>Triad Disposables, Inc.</td><td>NDC 50730-3201-1</td><td></td></tr><tr><td>Alcohol Prep Pads</td><td>McKesson Corp.</td><td>NDC 68599-5805-1</td><td></td></tr><tr><td>Cotton tipped applicators</td><td>Fisher Sientific</td><td>23-400-118</td><td></td></tr><tr><td>Fine Scissor</td><td>FST</td><td>14028-10</td><td></td></tr><tr><td>Micro-Adson Forcep</td><td>FST</td><td>11018-12</td><td></td></tr><tr><td>Clamp Applying Forcep</td><td>FST</td><td>00072-14</td><td></td></tr><tr><td>S&amp;amp;T Vascular Clamp</td><td>FST</td><td>00396-01</td><td></td></tr><tr><td>Spring Scissors</td><td>FST</td><td>15008-08</td><td></td></tr><tr><td>Colibri Retractors</td><td>FST</td><td>17000-04</td><td></td></tr><tr><td>Dumont #5 Forcep</td><td>FST</td><td>11251-20</td><td></td></tr><tr><td>Dumont #7 - Fine Forceps</td><td>FST</td><td>11274-20</td><td></td></tr><tr><td>Dumont #5/45 Forceps</td><td>FST</td><td>11251-35</td><td></td></tr><tr><td>Tish Needle Holder/Forceps</td><td>Micrins</td><td>MI1540</td><td></td></tr><tr><td>Black Polyamide Monofilament Suture, 10-0</td><td>AROSurgical Instruments Corporation</td><td>TI638402</td><td>For sutureing the graft</td></tr><tr><td>Black Polyamide Monofilament Suture, 6-0</td><td>AROSurgical Instruments</td><td>SN-1956</td><td>For musculature and skin closure</td></tr><tr><td>Non Woven Sponges</td><td>McKesson Corp.</td><td>94442000</td><td></td></tr><tr><td>Absorbable hemostat</td><td>Ethicon</td><td>1961</td><td></td></tr><tr><td>1 ml Syringe</td><td>BD</td><td>309659</td><td></td></tr><tr><td>3 ml Syringe</td><td>BD</td><td>309657</td><td></td></tr><tr><td>10 ml Syringe</td><td>BD</td><td>309604</td><td></td></tr><tr><td>18 G 1 1/2 in, Needle</td><td>BD</td><td>305190</td><td></td></tr><tr><td>25 G 1 in., Needle</td><td>BD</td><td>305125</td><td></td></tr><tr><td>30 G 1 in., Needle</td><td>BD</td><td>305106</td><td></td></tr><tr><td>Warm Water Recircultor</td><td>Gaymar</td><td>TP-700</td><td></td></tr><tr><td>Warming Pad</td><td>Gaymar</td><td>TP-22G</td><td></td></tr><tr><td>Trimmer</td><td>Wahl</td><td>9854-500</td><td></td></tr><tr><td>VEVO2100 High Frequency Ultrasound</td><td>VisualSonics</td><td>&lt;a href=&quot;http://www.visualsonics.com/vevo2100&quot;&gt;http://www.visualsonics.com/vevo2100&lt;/a&gt;</td><td>The catalog number and pricing can be acquired from the sales representatives.</td></tr><tr><td>Ultrasound transmission gel</td><td>Parker Laboratories,&lt;br/&gt; INC.</td><td>01-02</td><td></td></tr><tr><td>Table Top Laboratory Animal Anesthesia System</td><td>VetEquip, INC.</td><td>901806</td><td></td></tr><tr><td>Isoflurane</td><td>Baxter</td><td>1001936060</td><td></td></tr></tbody></table>

transplantation of pulmonary valve using a mouse model of heterotopic heart transplantation

Doku mühendisliği kalp kapakçıkları, özellikle decellularized vanalar, karışık sonuçlar rekonstrüktif cerrahi klinik kullanımda ivme kazanmaya başlıyor. Bununla birlikte, neotissue geliştirme, valf kalınlaşma ve stenoz gelişme hücresel ve moleküler mekanizmalar kapsamlı araştırılmış değildir. Yukarıdaki soruları cevaplamak için, biz bir kemirgen heterotopik kalp kapakçığı nakli modeli geliştirdi. Kalp valfi bir valf verici fareden toplanmış ve bir kalp verici fareye transplante edildi. Yeni bir vana ile kalp bir alıcı fareye heterotopically nakil oldu. Nakledilen kalp alıcının kalp atışı bağımsız, kendi kalp atışlarını gösterdi. Kan akışı, atımlı bir dalga Doppler ile yüksek frekanslı bir ultrason sistemi kullanılarak ölçülmüştür. Implante pulmoner valf üzerinden akış minimal yetersizliği akışını ileri gösterdi ve pik akım 100 mm / sn yakın oldu. Kalp kapağı nakli Bu fare modeli olan Highlçok yönlü y, değiştirilmiş ve bu nedenle farklı hemodinamik ortamlar sağlamak için ve / veya bir doku mühendisliği kalp valf neotissue gelişimini incelemek için çeşitli transgenik fareler ile birlikte kullanılabilir uyarlanabilir.

Şekil 1 heterotopik kalp nakli kullanarak kalp kapakçığı nakli modelinin şemaları göstermektedir. Kalp kapakçığı, bir donör kalbi hasat ve bir ikinci verici fareden alınan bir kalp üzerine yerleştirildi. Ardından yeni kalp kapak ile kalp bir alıcı fare karın implante edildi. 2. sağ kalp transplantasyonu (B) sonrasında, karın boşluğu (A) implante kalp bir örnek gösterir ve nakilden sonra 5 dk Şekil. Aort ve IV...

Watch this Scientific Journal Video about Transplantation of Pulmonary Valve Using a Mouse Model of Heterotopic Heart Transplantation at JoVE.com

Transplantation of Pulmonary Valve Using a Mouse Model of Heterotopic Heart Transplantation

Doku mühendisliği kalp kapakçıklarında neotissue oluşumu ve darlık gelişimi altında yatan hücresel ve moleküler mekanizmaları anlamak için, heterotopik kalp kapakçığı nakli bir fare modeli geliştirilmiştir. Bir pulmoner kalp kapak heterotopik kalp nakli tekniği kullanılarak alıcıya nakil oldu.

Heterotopik Kalp Nakli bir Fare Modeli Kullanarak Pulmoner Vana Nakli

Tissue engineered heart valves, especially decellularized valves, are starting to gain momentum in clinical use of reconstructive surgery with mixed ...

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18.8K Görüntüleme.  Nationwide Children's Hospital.  Doku mühendisliği kalp kapakçıklarında neotissue oluşumu ve darlık gelişimi altında yatan hücresel ve moleküler mekanizmaları anlamak için, heterotopik kalp kapakçığı nakli bir fare modeli geliştirilmiştir. Bir pulmoner kalp kapak heterotopik kalp nakli tekniği kullanılarak alıcıya nakil oldu. 

Video: Transplantation of Pulmonary Valve Using a Mouse Model of Heterotopic Heart Transplantation

Heterotopic Heart Transplantation in Mice

The mouse heterotopic heart transplantation has been used widely since it was introduced by Drs. Corry and Russell in 1973. It is particularly valuable for studying rejection and immune response now that newer transgenic and gene knockout mice are available, and a large number of immunologic reagents have been developed. The heart transplant model is less stringent than the skin transplant models, although technically more challenging. We have developed a modified technique and have completed over 1000 successful cases of heterotopic heart transplantation in mice. When making anastomosis of the ascending aorta and abdominal aorta, two stay sutures are placed at the proximal and distal apexes of recipient abdominal aorta with the donor s ascending aorta, then using 11-0 suture for anastomosis on both side of aorta with continuing sutures. The stay sutures make the anastomosis easier and 11-0 is an ideal suture size to avoid bleeding and thrombosis.
When making anastomosis of pulmonary artery and inferior vena cava, two stay sutures are made at the proximal apex and distal apex of the recipient s inferior vena cava with the donor s pulmonary artery. The left wall of the inferior vena cava and donor s pulmonary artery is closed with continuing sutures in the inside of the inferior vena cava after, one knot with the proximal apex stay suture the right wall of the inferior vena cava and the donor s pulmonary artery are closed with continuing sutures outside the inferior vena cave with 10-0 sutures. This method is easier to perform because anastomosis is made just on the one side of the inferior vena cava and 10-0 sutures is the right size to avoid bleeding and thrombosis. In this article, we provide details of the technique to supplement the video.

The mouse heterotopic heart transplantation model has been proven by many investigators to be an important method for studying mechanisms of rejection and immune response. However, the techniques involved are still challenging. By modifying standard techniques we have had success with more than 1000 transplants.

Farelerde Heterotopik Kalp Nakli

The mouse heterotopic heart transplantation has been used widely since it was introduced by Drs. Corry and Russell in 1973. It is particularly valuable ...

Biyoloji

Murine Cervical Heart Transplantation Model Using a Modified Cuff Technique

Mouse models are of special interest in research since a wide variety of monoclonal antibodies and commercially defined inbred and knockout strains are available to perform mechanistic in vivo studies. While heart transplantation models using a suture technique were first successfully developed in rats, the translation into an equally widespread used murine equivalent was never achieved due the technical complexity of the microsurgical procedure. In contrast, non-suture cuff techniques, also developed initially in rats, were successfully adapted for use in mice1-3. This technique for revascularization involves two major steps I) everting the recipient vessel over a polyethylene cuff; II) pulling the donor vessel over the formerly everted recipient vessel and holding it in place with a circumferential tie. This ensures a continuity of the endothelial layer, short operating time and very high patency rates4.
Using this technique for vascular anastomosis we performed more than 1,000 cervical heart transplants with an overall success rate of 95%. For arterial inflow the common carotid artery and the proximal aortic arch were anastomosed resulting in a retrograde perfusion of the transplanted heart. For venous drainage the pulmonary artery of the graft was anastomosed with the external jugular vein of the recipient5.
Herein, we provide additional details of this technique to supplement the video.

The murine cervical heart transplantation model is well suited for immunological as well as ischemia reperfusion injury studies. We modified the procedure using a non-suture cuff technique and performed more than 1,000 successful transplants with this approach.
Herein, we provide additional details of this technique to supplement the video.

Modifiye Manşet Tekniği Sıçangiller Servikal Kalp Nakli Modeli

Mouse models are of special interest in research since a wide variety of monoclonal antibodies and commercially defined inbred and knockout strains are ...

Tıp

A Modified Method for Heterotopic Mouse Heart Transplantion

Mice are often used as heart transplant donors and recipients in studies of transplant immunology due to the wide range of transgenic mice and reagents available. A difficulty is presented due to the small size of the animal and the considerable technical challenges of the microsurgery involved in heart transplantation. In particular, a high rate of technical failure early after transplantation may result from recipient death and post-operative complications such as hind limb paralysis or a non-beating heart. Here, the complete technique for heterotopic mouse heart transplantation is demonstrated, involving harvesting the donor heart and its subsequent implantation into a recipient mouse. The donor heart is harvested immediately following in situ perfusion with cold heparinized saline and transection of the ascending aorta and pulmonary artery. The recipient operation involves preparation of the abdominal aorta and inferior vena cava (IVC), followed by end-to-side anastomosis of the donor aorta with the recipient aorta using a single running 10-0 microsuture and a similar anastomosis of the donor pulmonary artery with the recipient IVC. Following the operation the animal is injected with 0.6 ml normal saline subcutaneously and allowed to recover on a 37&#160;&#176;C heating pad. The results from 227 mouse heart transplants are summarized with a success rate at 48 hr of 86.8%. Of the 13.2% failures within 48 hr, 5 (2.2%) experienced hind limb paralysis, 10 (4.4%) had a non-beating heart due to graft ischemic injury and/or thrombosis, while 15 (6.6%) died within 48 hr.

A technique is demonstrated for the microsurgical procedure for heterotopic transplantation of hearts in mice, including simplified methods for donor harvesting and recipient vessel anastomosis.

Heterotopik Fare Kalp NAKLİ için Modifiye Yöntem

Mice are often used as heart transplant donors and recipients in studies of transplant immunology due to the wide range of transgenic mice and reagents ...

Murine Heterotopic Heart Transplant Technique

It is now over forty years since this technique was first reported by Corry, Wynn and Russell. Although it took some years for other labs to become proficient in and utilize this technique, it is now widely used by many laboratories around the world. A significant refinement to the original technique was developed and reported in 2001 by Niimi. Described here are the techniques that have evolved over more than a decade in the hands of three surgeons (Plenter, Grazia, Pietra) in our center. These techniques are now being passed on to a younger generation of surgeons and researchers.
Based largely on the Niimi experience, the procedures used have evolved in the fine details - details which we will endeavor to relate here in such a way that others may be able to use this very useful model. Like Niimi, we have found that a video aid to learning is a priceless resource for the beginner.

The manuscript describes the steps required to perform the heterotopic heart transplant in the mouse.

Mürin Heterotopik Kalp Nakli Tekniği

It is now over forty years since this technique was first reported by Corry, Wynn and Russell. Although it took some years for other labs to become ...

A Novel Microsurgical Model for Heterotopic, En Bloc Chest Wall, Thymus, and Heart Transplantation in Mice

Exploration of novel strategies in organ transplantation to prolong allograft survival and minimizing the need for long-term maintenance immunosuppression must be pursued. Employing vascularized bone marrow transplantation and co-transplantation of the thymus have shown promise in this regard in various animal models.1-11 Vascularized bone marrow transplantation allows for the uninterrupted transfer of donor bone marrow cells within the preserved donor microenvironment, and the incorporation of thymus tissue with vascularized bone marrow transplantation has shown to increase T-cell chimerism ultimately playing a supportive role in the induction of immune regulation. The combination of solid organ and vascularized composite allotransplantation can uniquely combine these strategies in the form of a novel transplant model. Murine models serve as an excellent paradigm to explore the mechanisms of acute and chronic rejection, chimerism, and tolerance induction, thus providing the foundation to propagate superior allograft survival strategies for larger animal models and future clinical application. Herein, we developed a novel heterotopic en bloc chest wall, thymus, and heart transplant model in mice using a cervical non-suture cuff technique. The experience in syngeneic and allogeneic transplant settings is described for future broader immunological investigations via an instructional manuscript and video supplement.

To study combined solid organ and vascularized composite allotransplantation, we describe a novel heterotopic en bloc chest wall, thymus, and heart transplant model in mice using a cervical non-suture cuff technique.

Farelerde A Novel Mikrocerrahi Heterotopik Modeli, En Bloku Göğüs Duvarı, Thymus ve Kalp Nakli

Exploration of novel strategies in organ transplantation to prolong allograft survival and minimizing the need for long-term maintenance immunosuppression ...

A Pre-Clinical Porcine Model of Orthotopic Heart Transplantation

Fifty-years following the first successful report, cardiac transplantation remains the gold-standard treatment for eligible patients with advanced heart failure. Multiple small-animal models of heart transplantation have been used to study the acute and long-term effects of novel therapies. However, few are tested and demonstrated success in clinical trials. It is of critical importance to evaluate new therapies in a clinically relevant large-animal model for efficient and reliable translation of basic studies&#39;&#160;findings. Here, we describe a pre-clinical large-animal (porcine) model of orthotopic heart transplantation that has been firmly established and previously used to investigate novel cardioprotective strategies. This procedure focuses on acute ischemia-reperfusion injury and is a reliable method to investigate novel interventions which have been tested and validated in smaller experimental models, such as the murine model. We demonstrate its usefulness in assessing cardiac performance during the early post-transplantation period and other potential possibilities enabled by the model.

Here, we describe a pre-clinical large-animal (porcine) model of orthotopic heart transplantation that has been firmly established and utilized to investigate novel cardioprotective strategies.

Ortootopik kalp transplantasyonunun klinik öncesi porcine modeli

Fifty-years following the first successful report, cardiac transplantation remains the gold-standard treatment for eligible patients with advanced heart ...

Mouse Heterotopic Cervical Cardiac Transplantation Utilizing Vascular Cuffs

Murine models of cardiac transplantation are frequently utilized to study ischemia-reperfusion injury, innate and adaptive immune responses after transplantation, and the impact of immunomodulatory therapies on graft rejection. Heterotopic cervical heart transplantation in mice was first described in 1991 using sutured anastomoses and subsequently modified to include cuff techniques. This modification allowed for improved success rates, and since then, there have been multiple reports that have proposed further technical improvements. However, translation into more widespread utilization remains limited due to the technical difficulty associated with graft anastomoses, which requires precision to achieve adequate length and caliber of the cuffs to avoid vascular anastomotic twisting or excessive tension, which can result in damage to the graft. The present protocol describes a modified technique for performing heterotopic cervical cardiac transplantation in mice which involves cuff placement on the recipient's common carotid artery and the donor's pulmonary artery in alignment with the direction of the blood flow.

Mouse cardiac transplantation models represent valuable research tools for studying transplantation immunology. The present protocol details mouse heterotopic cervical cardiac transplantation that involves the placement of cuffs on the recipient's common carotid artery and the donor's pulmonary artery trunk to allow for laminar blood flow.

Vasküler Manşetler Kullanılarak Fare Heterotopik Servikal Kardiyak Transplantasyonu

Murine models of cardiac transplantation are frequently utilized to study ischemia-reperfusion injury, innate and adaptive immune responses after ...

İmmünoloji ve Enfeksiyon

Blood Circuit Reconstruction in an Abdominal Mouse Heart Transplantation Model

The surgical technique of heterotopic abdominal heart transplantation in mice is a standard model for research in transplantation immunology. Here, the established technique for a modified blood circuit reconstruction in a heterotopic abdominal heart transplantation model is presented. This method uses the intrathoracic inferior vena cava (IIVC) instead of the pulmonary artery of the donor heart for the anastomosis to the inferior vena cava of the recipient. It is facilitating and improving success rates for abdominal heart transplantation in mice.

A novel technique for blood circuit reconstruction in a heterotopic abdominal mouse heart transplantation model is demonstrated.

Abdominal Fare Kalp Nakli Modelinde Kan Devresi Rekonstrüksiyonu

The surgical technique of heterotopic abdominal heart transplantation in mice is a standard model for research in transplantation immunology. Here, the ...

A Simplified Model for Heterotopic Heart Valve Transplantation in Rodents

There is an urgent clinical need for heart valve replacements that can grow in children. Heart valve transplantation is proposed as a new type of transplant with the potential to deliver durable heart valves capable of somatic growth with no requirement for anticoagulation. However, the immunobiology of heart valve transplants remains unexplored, highlighting the need for animal models to study this new type of transplant. Previous rat models for heterotopic aortic valve transplantation into the abdominal aorta have been described, though they are technically challenging and costly. For addressing this challenge, a renal subcapsular transplant model was developed in rodents as a practical and more straightforward method for studying heart valve transplant immunobiology. In this model, a single aortic valve leaflet is harvested and inserted into the renal subcapsular space. The kidney is easily accessible, and the transplanted tissue is securely contained in a subcapsular space that is well vascularized and can accommodate a variety of tissue sizes. Furthermore, because a single rat can provide three donor aortic leaflets and a single kidney can provide multiple sites for transplanted tissue, fewer rats are required for a given study. Here, the transplantation technique is described, providing a significant step forward in studying the transplant immunology of heart valve transplantation.

This protocol describes a simple and efficient method for the transplantation of aortic valve leaflets under the renal capsule to allow for the study of alloreactivity of heart valves.

Kemirgenlerde Heterotopik Kalp Kapağı Transplantasyonu için Basitleştirilmiş Bir Model

There is an urgent clinical need for heart valve replacements that can grow in children. Heart valve transplantation is proposed as a new type of ...

A Modified Cuff Technique for Mouse Cervical Heterotopic Heart Transplantation Model

Cardiac allograft rejection limits the long-term survival of patients after heart transplantation. A mouse heart transplantation model is ideal for investigating the mechanism of cardiac allograft rejection in preclinical studies because of their high homology with human genes. This understanding would help develop unique approaches to improving patients&#39; long-term survival treated with cardiac allografts. In a mouse model, abdominal donor heart implantation is commonly performed with an end-to-end&#160;anastomosis to the recipient&#39;s aorta and inferior vena cava using stitches. In this model, the donor&#39;s heart is implanted by end-to-end anastomosis to the recipient&#39;s carotid artery and jugular vein by the modified-Cuff technique. The transplantation surgery is performed without stitching and thus may increase the survival of the recipient since there is no interference with the blood supply and venous reflux of the lower body. This mouse model would help investigate the mechanisms underlying the immunological and pathological (acute/chronic) rejection of cardiac allografts.

In the present protocol, a mouse heart transplantation model is used for investigating the mechanism of cardiac allograft rejection. In this heterotopic heart transplantation model, operation efficiency is improved, and the survival of cardiac grafts is ensured by a cervical end-to-end anastomosis of heart implantation using a modified Cuff technique.

Fare Servikal Heterotopik Kalp Transplantasyon Modeli için Modifiye Manşet Tekniği

Cardiac allograft rejection limits the long-term survival of patients after heart transplantation. A mouse heart transplantation model is ideal for ...