Summary

マウスで同所後肢移植

Published: February 12, 2016
doi:

Summary

超微小血管吻合のための非縫合カフ技術を適用したマウスにおける同所後肢移植のためのこの新規モデルは、血管新生複合同種移植(VCA)に関連したin vivoでのメカニズムの免疫学的研究のための強力なツールを提供します。

Abstract

In vivo animal model systems, and in particular mouse models, have evolved into powerful and versatile scientific tools indispensable to basic and translational research in the field of transplantation medicine. A vast array of reagents is available exclusively in this setting, including mono- and polyclonal antibodies for both diagnostic and interventional applications. In addition, a vast number of genotyped, inbred, transgenic, and knock out strains allow detailed investigation of the individual contributions of humoral and cellular components to the complex interplay of an immune response and make the mouse the gold standard for immunological research.

Vascularized Composite Allotransplantation (VCA) delineates a novel field of transplantation using allografts to replace “like with like” in patients suffering traumatic or congenital tissue loss. This surgical methodological protocol shows the use of a non-suture cuff technique for super-microvascular anastomosis in an orthotopic mouse hind limb transplantation model. The model specifically allows for comparison between established paradigms in solid organ transplantation with a novel form of transplants consisting of various different tissue components. Uniquely, this model allows for the transplantation of a viable vascularized bone marrow compartment and niche that have the potential to exert a beneficial effect on the balance of immune acceptance and rejection. This technique provides a tool to investigate alloantigen recognition and allograft rejection and acceptance, as well as enables the pursuit of functional nerve regeneration studies to further advance this novel field of transplantation.

Introduction

The late nineties heralded the pioneering days of reconstructive transplantation with the first successful hand transplant performed in France in 1998. Since then, the use of VCAs for reconstruction of devastating tissue defects has been successfully employed in a wide spectrum of patients. To date, the world counts 76 recipients of 112 upper extremities as well as 31 faces 1-3. In addition, several other types of VCAs such as abdominal wall 4, larynx 5, trachea 6, vascularized joints 7, and even penis 8 have been performed. Furthermore, the live birth of a baby was recently reported after uterus transplantation 9. This growing world experience is indicative for how reconstructive transplantation has become a valid therapeutic option for patients suffering of significant functional tissue defects not amendable to conventional reconstructive and restorative surgery and treatment.

While the idea of replacing “like with like” sparked clinical enthusiasm, initial skepticism still prevails with regards to side effects of conventional high-dose immunosuppression required to maintain allografts and their function 10,11. However, as shown by seminal work of Lee et al., these composite grafts are less likely to reject than its individual components, and furthermore, some of the tissue components such as the vascularized bone compartment have fueled optimism as they might exert unique immunological effects onto the balance of immune acceptance and rejection 12.

Our group pioneered several microsurgical animal models for solid organ transplantation, as well as vascularized composite allotransplantation 13-19. Here we describe a novel surgical procedure using a non-suture cuff technique to perform super micro-vascular anastomosis in an orthotopic mouse hind limb transplantation model. This transplant model provides a useful tool for investigating immune acceptance and rejection mechanisms, as well as the role of individual tissue components, such as the vascularized bone marrow compartment, towards tolerance induction in the immunologically versatile setting of the mouse species. Additionally, the orthotopic placement of the limb opens the possibilities for nerve regeneration and functional outcome studies, which are critically important to the setting of VCA.

Protocol

全ての実験は、国立衛生研究所の実験動物の管理と使用に関する指針(NIH)に従って行ったし、ジョンズ・ホプキンス大学動物実験委員会(JHUACUC)によって承認されました。具体的な手順は、承認されたACUCプロトコルMO13M108下で行いました。 1.ドナー操作手術前に各薬理学的製剤のための適切な時点で鎮痛を管理します。承認された動物の世話のとおりと前皮膚切開にブプレノ…

Representative Results

非縫合カフ技術を用いて、マウスモデルにおいて血管新生複合同種移植を行うと、 図1に示すように優れ、長期間の移植および動物の生存を達成することができる。また、血管新生合成の緩やかな同種移植片拒絶反応の再現可能な結果を得るための信頼できる方法を表します。などの同種移植は、 図2に示されている画像によって文書化。拒?…

Discussion

このような壊滅的な組織欠損の再建のための上肢と顔面移植などの血管新生したコンポジット同種移植は、従来の再建手続きに修正可能ではない患者に対する有効な治療法の選択肢として発展してきました。マイクロサージャリーの分野における技術の進歩だけでなく、強力な免疫抑制および固形臓器移植における免疫調節療法と豊富な経験は、今、このユニークな患者集団3,21の長?…

Divulgazioni

The authors have nothing to disclose.

Acknowledgements

この作品は賞号W81XWH-13-2-0053の下で、AFIRM II努力をサポートするために、陸軍、海軍、NIH、空軍、VAおよび保健省によってサポートされていました。米陸軍医学研究買収活動、820チャンドラーストリート、フォート・デトリックMD 21702から5014までは表彰および管理取得オフィスです。ご意見、解釈、結論と勧告は著者のものであり、必ずしも国防総省によって承認されていません。

著者らは、この研究の間に、その優れた獣医のサポートのためにジェシカイッチ、DVM、キャロライン・ギャレット、DVMとジュリー・ワトソン、DVMに感謝したいと思います。

Materials

Suture, 6-0 Nylon MWI 31849
Suture, 6-0 Polysorb MWI 72667
Suture, 10-0 Nylon Aero Surgical TK-107038
Polyimide Tubing, Size 25 Vention Medical 141-0023
Polyimide Tubing, Size 27 Vention Medical 141-0015
Microvascular Clamps (Single) Synovis 00396
Microvascular Clamps (Double) Synovis 00414
Micro-Scissors Synovis SAS-18
Micro-Forceps Synovis FRS-15 RM-8
Micro-Dilators Synovis FRS-15 RM-8d.1
Micro-Needledriver Synovis C-14
Micro-Clamp Applicator Synovis CAF-4
Micro-Flushing Needle Hamilton N/A 10MM, 30°, 33G
Lactated Ringers Solution Fisher Scientific NC9968051
Buprenorphine N/A N/A DEA Number required; Obtained from hosptial pharmacy.
Enrofloxacin; Baytril Bayer Health Care 186599
Heparin N/A N/A Obtained from hosptial pharmacy

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Furtmüller, G. J., Oh, B., Grahammer, J., Lin, C., Sucher, R., Fryer, M. L., Raimondi, G., Lee, W. A., Brandacher, G. Orthotopic Hind Limb Transplantation in the Mouse. J. Vis. Exp. (108), e53483, doi:10.3791/53483 (2016).

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