1. Donor Operation
<ol>
	<li>The donor rat should be kept fasting for 24 hr (free access to water/glucose solution).</li>
	<li>To induce Isoflurane inhalation anesthesia, start with 2% on standard atomizer, and then reduce to 1% after performing laparotomy. Perform a toe pinch to check sedation.</li>
	<li>Shave the abdomen and clean with skin prep 3 times (Kodan). Then perform a median incision after subcutaneous administration of the analgesic.</li>
	<li>After the graft is wrapped in saline soaked gauze, separate the ...

<ol>
	<li>Abu-Elmagd, K. 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=Five+Hundred+Intestinal+and+Multivisceral+Transplantations+at+a+Single+Center:+Major+Advances+With+New+Challenges.">Five Hundred Intestinal and Multivisceral Transplantations at a Single Center: Major Advances With New Challenges.</a> Ann. Surg. 250 (4), 567-56 (2009).</li><li>Berney, 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=Portal+versus+systemic+drainage+of+small+bowel+allografts:+comparative+assessment+of+survival,+function,+rejection,+and+bacterial+translocation.">Portal versus systemic drainage of small bowel allografts: comparative assessment of survival, function, rejection, and bacterial translocation.</a> J. Am. Coll. Surg. 195 (6), 804 (2002).</li><li>Fishbein, T. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Intestinal+transplantation.">Intestinal transplantation.</a> N. Engl. J. Med. 361 (10), 998 (2009).</li><li>Hernandez, F., 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=Is+portal+venous+outflow+better+than+systemic+venous+outflow+in+small+bowel+transplantation?+Experimental+study+in+syngeneic+rats.">Is portal venous outflow better than systemic venous outflow in small bowel transplantation? Experimental study in syngeneic rats.</a> J. Pediatr. Surg. 40 (2), 336 (2005).</li><li>Monchik, G. J., Russell, P. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Transplantation+of+small+bowel+in+the+rat:+technical+and+immunological+considerations.">Transplantation of small bowel in the rat: technical and immunological considerations.</a> Surgery. 70 (5), 693 (1971).</li><li>Murase, 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=Graft-versus-host+disease+after+brown+Norway-to-Lewis+and+Lewis-to-Brown+Norway+rat+intestinal+transplantation+under+FK506.">Graft-versus-host disease after brown Norway-to-Lewis and Lewis-to-Brown Norway rat intestinal transplantation under FK506.</a> Transplantation. 55 (1), 1 (1993).</li><li>Murase, 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=Immunomodulation+of+intestinal+transplant+with+allograft+irradiation+and+simultaneous+donor+bone+marrow+infusion.">Immunomodulation of intestinal transplant with allograft irradiation and simultaneous donor bone marrow infusion.</a> Transplant Proc. 31 (1-2), 565 (1999).</li><li>Pech, 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=Perioperative+infliximab+application+ameliorates+acute+rejection+associated+inflammation+after+intestinal+transplantation.">Perioperative infliximab application ameliorates acute rejection associated inflammation after intestinal transplantation.</a> Am. J. Transplant. 10 (11), 2431 (2010).</li><li>Schaefer, 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=Resident+macrophages+are+involved+in+intestinal+transplantation-associated+inflammation+and+motoric+dysfunction+of+the+graft+muscularis.">Resident macrophages are involved in intestinal transplantation-associated inflammation and motoric dysfunction of the graft muscularis.</a> Am J Transplant. 7 (5), 1062 (2007).</li><li>Schaefer, 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=Mechanism+and+impact+of+organ+harvesting+and+ischemia-reperfusion+injury+within+the+graft+muscularis+in+rat+small+bowel+transplantation.+Transplant.">Mechanism and impact of organ harvesting and ischemia-reperfusion injury within the graft muscularis in rat small bowel transplantation. Transplant.</a> Proc. 38 (6), 1821 (2006).</li><li>Schaefer, 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=Acute+rejection+and+the+muscularis+propria+after+intestinal+transplantation:+the+alloresponse,+inflammation,+and+smooth+muscle+function.">Acute rejection and the muscularis propria after intestinal transplantation: the alloresponse, inflammation, and smooth muscle function.</a> Transplantation. 85 (10), 1465 (2008).</li><li>Xue, 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=Surgical+experience+of+refined+3-cuff+technique+for+orthotopic+small-bowel+transplantation+in+rat:+a+report+of+270+cases.">Surgical experience of refined 3-cuff technique for orthotopic small-bowel transplantation in rat: a report of 270 cases.</a> Am. J. Surg. 198 (1), 110 (2009).</li><li>Zhang, X. Q., 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=Simplified+techniques+in+rat+heterotopic+small+bowel+transplantation.">Simplified techniques in rat heterotopic small bowel transplantation.</a> Transplant. Proc. 38 (6), 1840 (2006).</li><li>Zhao, 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=The+establishment+of+a+new+en+bloc+combined+liver-small+bowel+transplantation+model+in+rats.+Transplant.">The establishment of a new en bloc combined liver-small bowel transplantation model in rats. Transplant.</a> Proc. 39 (1), 278 (2007).</li></ol>

No conflicts of interest declared.

While intestinal transplant models in rats have been described as early as in the 1970ies 5 most of the recently employed models involve heterotopic intestinal transplantation using different techniques 13. While the heterotopic procedures in general have the advantage of easier microsurgical techniques and easier accessibility of the graft for assessment, heterotopic intestinal transplantation has the big disadvantage of not taking into account the multiple interactions of the transplanted s...

<table border="1">
 <tbody>
 <tr>
 <td>Name of the reagent</td>
 <td>Company</td>
 <td>Catalogue number</td>
 <td>Comments (optional)</td>
 </tr>
 <tr>
 <td>University of Wisconsin (UW) solution (ViaSpan)</td>
 <td>Bristol-Myers Squibb </td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>Uro-Nebacetin N solution</td>
 <td>Nycomed</td>
 <td>6967855</td>
 <td></td>
 </tr>
 <tr>
 <td>Ampicillin</td>
 <td>Ratiopharm</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>Carprofen (Rimadyl)</td>
 <td>Pfizer</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>Prolene 10-0 unresorbable suture</td>
 <td>Ethicon</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>Monocryl 6-0 resorbable suture</td>
 <td>Ethicon</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>Vicryl 3-0 resorbable suture</td>
 <td>Ethicon</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>i.v. Catheter G 20 1.1x33 mm</td>
 <td>Braun</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>i.v. Catheter G 22 0.9x25 mm</td>
 <td>Braun</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>Kodan Skin Prep</td>
 <td>Sch&uuml;lke</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>NaCl 0.9% Infusion solution</td>
 <td>Braun</td>
 <td></td>
 <td></td>
 </tr>
 <tr>
 <td>Curved forceps small </td>
 <td>FineScienceTools</td>
 <td>11009-13 </td>
 <td></td>
 </tr>
 <tr>
 <td>Micro forceps curved </td>
 <td>AESCULAP </td>
 <td>BD 333 </td>
 <td></td>
 </tr>
 <tr>
 <td>Micro forceps curved </td>
 <td>AESCULAP </td>
 <td>FD281R </td>
 <td></td>
 </tr>
 <tr>
 <td>Micro forceps straight 1 </td>
 <td>WPI</td>
 <td>5</td>
 <td></td>
 </tr>
 <tr>
 <td>Micro forceps straight 2 </td>
 <td>WPI</td>
 <td>2</td>
 <td></td>
 </tr>
 <tr>
 <td>Micro needle holder </td>
 <td>WPI </td>
 <td>14081 </td>
 <td></td>
 </tr>
 <tr>
 <td>Micro scissors</td>
 <td>FineScienceTools</td>
 <td>15006-09 </td>
 <td></td>
 </tr>
 <tr>
 <td>Micro scalpel </td>
 <td>MANI</td>
 <td>Ophthalmic knife</td>
 <td></td>
 </tr>
 <tr>
 <td>Micro clamps</td>
 <td>AESCULAP </td>
 <td>FB329R </td>
 <td></td>
 </tr>
 </tbody>
</table>

orthotopic small bowel transplantation in rats

Small bowel transplantation has become an accepted clinical option for patients with short gut syndrome and failure of parenteral nutrition (irreversible intestinal failure). In specialized centers improved operative and managing strategies have led to excellent short- and intermediate term patient and graft survival while providing high quality of life 1,3. Unlike in the more common transplantation of other solid organs (i.e. heart, liver) many underlying mechanisms of graft function and immunologic alterations induced by intestinal transplantation are not entirely known6,7. Episodes of acute rejection, sepsis and chronic graft failure are the main obstacles still contributing to less favorable long term outcome and hindering a more widespread employment of the procedure despite a growing number of patients on home parenteral nutrition who would potentially benefit from such a transplant. The small intestine contains a large number of passenger leucocytes commonly referred to as part of the gut associated lymphoid system (GALT) this being part of the reason for the high immunogenity of the intestinal graft. The presence and close proximity of many commensals and pathogens in the gut explains the severity of sepsis episodes once graft mucosal integrity is compromised (for example by rejection). To advance the field of intestinal- and multiorgan transplantation more data generated from reliable and feasible animal models is needed. The model provided herein combines both reliability and feasibility once established in a standardized manner and can provide valuable insight in the underlying complex molecular, cellular and functional mechanisms that are triggered by intestinal transplantation. We have successfully used and refined the described procedure over more than 5 years in our laboratory 8-11. The JoVE video-based format is especially useful to demonstrate the complex procedure and avoid initial pitfalls for groups planning to establish an orthotopic rodent model investigating intestinal transplantation.

Normal postoperative course
The transplanted animals should recover quickly from the procedure under a heat lamp for approximately 1 hr. Hypothermia is a major cause of postoperative mortality and should be carefully avoided intra- and postoperatively. Intraoperative fluid losses must be replaced by s.c. injection of 2.5 ml normal saline plus 2.5 ml Glucose 5% every 8 hr for the first 24 hr. The rats should also have free access to glucose solution (or gel diet) and water p.o. for the first 24 hr...

Watch this Scientific Journal Video about Orthotopic Small Bowel Transplantation in Rats at JoVE.com

Orthotopic Small Bowel Transplantation in Rats

Small bowel transplantation has become an accepted treatment option for patients with irreversible intestinal failure. Our experimental model of orthotopic small bowel transplantation in rats serves as a reliable tool to address underlying immunologic and inflammatory processes that complicate intestinal transplantation.

Small  bowel transplantation has become an accepted clinical option for patients with  short gut syndrome and failure of parenteral nutrition ...

orthotopic-small-bowel-transplantation-in-rats

Research

JoVE Journal

Medicine

14.0K visualizações.  University of Bonn, Germany. Transplante de intestino delgado tornou-se uma opção de tratamento aceitável para os pacientes com falência intestinal irreversível. Nosso modelo experimental de transplante intestinal ortotópico pequena em ratos serve como uma ferramenta confiável para enfrentar imunológico subjacente e os processos inflamatórios que complicam o transplante intestinal.