Fonctionnement des donateurs et Hind-Limb récolte <ol><li> Pour la procédure opératoire d&#39;un ensemble d&#39;instruments de microchirurgie stériles sont utilisées. Le chirurgien doit porter des vêtements appropriés, y compris des gants stériles, qui doivent être modifiés avant le début de la procédure chirurgicale. </li><li> Le rat est anesthésié par une injection intrapéritonéale de pentobarbital (50mg/kg IP) et placé en décubitus dorsal sur un champ d&#39;opération chauffée, ce qui facilite une température corporelle des animaux stables pendant toute la procédure chirurgicale. </li><li> Avant l&#39;incision de la peau a déposé de l&#39;opération est aseptisée trois fois avec les deux, un désinfectant et de l&#39;alcool. Pour éviter les cornées des animaux de se dessécher, les yeux sont lubrifiés avec une pommade ophtalmique (Vidisic) avant la chirurgie. </li><li> Une incision cutanée est faite à travers l&#39;aine droite à peu près au niveau du ligament inguinal. Les vaisseaux fémoraux sont disséqués avec bipolaire et la dissection; branches profondes sont ligués avec 8-0 soie. </li><li> 300μl (50 UI) d&#39;héparine sont injectées dans la veine du pénis pour l&#39;anti-coagulation. </li><li> Vaisseaux fémoraux sont ligaturées au niveau du ligament inguinal et couper en aval de la ligature. </li><li> Le membre postérieur est rincée avec de la glace-froid (4 ° C) HTK solution (5 ml) par l&#39;artère fémorale de plus de 5 minutes. </li><li> Tous les groupes musculaires sont très divisés avec des ciseaux et une ostéotomie est réalisée avec un électrique tournante vu au niveau du tiers distal du fémur. </li><li> Le membre récolté est ensuite immergée dans 20 ml de solution glacée HTK pour la préservation et de stockage à froid jusqu&#39;à la transplantation. </li></ol> Récipiendaire de fonctionnement et la transplantation <ol><li> Le rat est anesthésié par une injection intrapéritonéale de pentobarbital et placé en position couchée sur le champ opératoire. </li><li> Une incision cutanée est faite à travers l&#39;aine droite à peu près au niveau du ligament inguinal. Les vaisseaux fémoraux sont disséqués avec bipolaire et la dissection. </li><li> Vaisseaux fémoraux sont ligués en distal que possible, mais en amont de la cuve décollage épigastrique. Clamps vasculaires sont placés au niveau du ligament inguinal sur l&#39;artère et la veine. </li><li> Un brassard polyéthylène est tiré sur l&#39;artère (diamètre intérieur du brassard: 0.912 mm, boutons de manchette épaisseur de paroi: 0.010 mm, longueur du brassard: 2,0 mm) et la veine (diamètre intérieur du brassard: 1.151 mm; manchette épaisseur de paroi: 0.010 mm, longueur manchette : 2,0 mm). Le bord de la lumière du vaisseau est alors tiré avec un dilatateur des navires et l&#39;artère et la veine fémorales sont éversée sur tout le corps de la coiffe (environ 2mm) et fixé avec un circonférentielle 8-0 ligature de soie. </li><li> Pour faire place à la branche des bailleurs de fonds du membre destinataire est enlevé avec dissection des groupes musculaires et ostéotomie est effectuée à la mi-fémur. </li><li> Le membre donateur est retirée de la solution HTK et de la transplantation débute avec ostéosynthèse du fémur à l&#39;aide d&#39;une aiguille de calibre 18 (longueur: 1.5-2.0 cm) comme une tige intramédullaire. </li><li> Groupes de muscles ventraux sont étroitement approchée avec Vicryl 4-0 ou Prolène sutures interrompues. </li><li> Anastomoses vasculaires sont réalisées en tirant la veine des bailleurs de fonds et de l&#39;artère de la veine des bénéficiaires et complexe brassard. Un circonférentielle 8-0 ligature de soie est de nouveau placé pour sécuriser l&#39;anastomose. </li><li> La pince est relâchée veineuse suivie par la pince artérielle, et la reperfusion est visualisée par le retour de la couleur à l&#39;extrémité du membre et du pied, ainsi que le flux pulsatile dans l&#39;artère. </li><li> Les autres groupes musculaires dorsales sont ré-approchée avec Vicryl 4-0 ou Prolène sutures interrompues. </li><li> La peau est fermée avec Vicryl 4-0 ou prolène sutures interrompues. </li><li> Le rat receveur est placé sur un coussin chauffant et surveillé de près jusqu&#39;à la guérison. </li><li> Animaux bénéficiaires reçoivent des antibiotiques prophylactiques (céfazoline, 20 mg / jour, IM) et Buprenex (0,1 mg / kg, SC) pendant trois jours après la greffe. </li></ol>

<ol>
	<li>Shapiro, R. I., Cerra, F. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+model+for+reimplantation+and+transplantation+of+a+complex+organ:+the+rat+hind+limb.">A model for reimplantation and transplantation of a complex organ: the rat hind limb.</a> J Surg Res. 24 (6), 501-506 (1978).</li><li>Petruzzo, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+international+registry+on+hand+and+composite+tissue+transplantation.">The international registry on hand and composite tissue transplantation.</a> Transplantation. 86 (4), 487-492 (2008).</li><li>Schneeberger, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=First+forearm+transplantation:+outcome+at+3+years.">First forearm transplantation: outcome at 3 years.</a> Am J Transplant. 7 (7), 1753-1762 (2007).</li></ol>

Des décennies de recherches expérimentales ont précédé et permis la transplantation réussie main de l&#39;homme dans le passé récent. En 1978, Shapiro et al. développé un modèle orthotopique postérieurs greffe des membres chez le rat, bien adapté à l&#39;étude de divers aspects pathologiques, physiologiques et immunologiques ainsi que les résultats fonctionnels des greffes de tissus composites. Nous avons modifié la partie la plus difficile de la procédure, à savoir l&#39;anastomose vasculaire, en int...

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orthotopic hind-limb transplantation in rats

Allotransplantation de tissus composites (ATC) représente désormais une option thérapeutique valable après la perte d&#39;une main, l&#39;avant-bras ou de chiffres et est devenu une entité thérapeutique nouvelle dans la chirurgie reconstructrice. Cependant, à long terme de fortes doses de plusieurs médicaments immunosuppresseurs est nécessaire pour assurer la survie du greffon, portant le risque d&#39;effets secondaires graves qui licols application plus large. Progression de plus dans ce domaine peuvent dépendre meilleure compréhension de l&#39;immunologie fondamentale et de lésions de reperfusion d&#39;ischémie dans les greffes de tissus composites. À ce jour, la transplantation orthotopique des membres postérieurs chez le rat a été le modèle de rongeur préféré pour la reconstruction de transplantation (RT), cependant, il est une procédure extrêmement exigeant qui demande des compétences de microchirurgie extraordinaire pour le rattachement de la vascularisation, les os, les muscles et les nerfs. Nous avons introduit la technique de la coiffe des anastomosés à ce modèle, offrant une approche rapide et fiable à la transplantation chez le rat des membres postérieurs. Cette technique simplifie et raccourcit la procédure chirurgicale et permet aux chirurgiens ayant l&#39;expérience de microchirurgie de base pour réaliser avec succès l&#39;opération avec la survie élevé et faible taux de complications. La technique semble être bien adapté pour immunologiques ainsi que l&#39;ischémie reperfusion (IRI) des études.

Watch this Scientific Journal Video about Orthotopic Hind-Limb Transplantation in Rats at JoVE.com

Orthotopic Hind-Limb Transplantation in Rats

Nous décrivons ici le rat procédure de transplantation orthotopique arrière-membre, ce qui semble être l&#39;étalon-or<em&gt; In vivo</em&gt; Modèle pour la recherche sur les tissus allotransplantation composite.

Hind-Limb orthotopique transplantation chez le rat

Composite tissue allotransplantation (CTA) now represents a valid therapeutic option after the loss of a hand, forearm or digits and has become a novel ...

orthotopic-hind-limb-transplantation-in-rats

Research

JoVE Journal

Immunology and Infection

11.6K vues.  Innsbruck Medical University. Nous décrivons ici le rat procédure de transplantation orthotopique arrière-membre, ce qui semble être l'étalon-or In vivo Modèle pour la recherche sur les tissus allotransplantation composite.

Vidéo: Orthotopic Hind-Limb Transplantation in Rats

In vivo Imaging Method to Distinguish Acute and Chronic Inflammation

Inflammation is a fundamental aspect of many human diseases. In this video report, we demonstrate non-invasive bioluminescence imaging techniques that distinguish acute and chronic inflammation in mouse models. With tissue damage or pathogen invasion, neutrophils are the first line of defense, playing a major role in mediating the acute inflammatory response. As the inflammatory reaction progresses, circulating monocytes gradually migrate into the site of injury and differentiate into mature macrophages, which mediate chronic inflammation and promote tissue repair by removing tissue debris and producing anti-inflammatory cytokines. Intraperitoneal injection of luminol (5-amino-2,3-dihydro-1,4-phthalazinedione, sodium salt) enables detection of acute inflammation largely mediated by tissue-infiltrating neutrophils. Luminol specifically reacts with the superoxide generated within the phagosomes of neutrophils since bioluminescence results from a myeloperoxidase (MPO) mediated reaction. Lucigenin (bis-N-methylacridinium nitrate) also reacts with superoxide in order to generate bioluminescence. However, lucigenin bioluminescence is independent of MPO and it solely relies on phagocyte NADPH oxidase (Phox) in macrophages during chronic inflammation. Together, luminol and lucigenin allow non-invasive visualization and longitudinal assessment of different phagocyte populations across both acute and chronic inflammatory phases. Given the important role of inflammation in a variety of human diseases, we believe this non-invasive imaging method can help investigate the differential roles of neutrophils and macrophages in a variety of pathological conditions.

In vivo Imaging Method to Distinguish Acute and Chronic Inflammation

We describe a non-invasive imaging method for distinguishing inflammatory stages. Systemic delivery of luminol reveals areas of acute inflammation dependent upon MPO activity in neutrophils. In contrast, injection of lucigenin allows for visualization of chronic inflammation dependent upon Phox activity in macrophages.

In vivo méthode d&#39;imagerie à distinguer inflammation aiguë et chronique

Inflammation is a fundamental aspect of many human diseases. In this video report, we demonstrate non-invasive bioluminescence imaging techniques that ...

Recherche

Immunologie et infection

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

A mouse model of chronic airway infection is a key asset in cystic fibrosis (CF) research, although there are a number of concerns regarding the model itself. Early phases of inflammation and infection have been widely studied by using the Pseudomonas aeruginosa agar-beads mouse model, while only few reports have focused on the long-term chronic infection in vivo. The main challenge for long term chronic infection remains the low bacterial burden by P. aeruginosa and the low percentage of infected mice weeks after challenge, indicating that bacterial cells are progressively cleared by the host.
This paper presents a method for obtaining efficient long-term chronic infection in mice. This method is based on the embedding of the P. aeruginosa clinical strains in the agar-beads in vitro, followed by intratracheal instillation in C57Bl/6NCrl mice. Bilateral lung infection is associated with several measurable read-outs including weight loss, mortality, chronic infection, and inflammatory response. The P. aeruginosa RP73 clinical strain was preferred over the PAO1 reference laboratory strain since it resulted in a comparatively lower mortality, more severe lesions, and higher chronic infection. P. aeruginosa colonization may persist in the lung for over three months. Murine lung pathology resembles that of CF patients with advanced chronic pulmonary disease.
This murine model most closely mimics the course of the human disease and can be used both for studies on the pathogenesis and for the evaluation of novel therapies.

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

We describe the agar-beads method to establish persistent long-term chronic Pseudomonas aeruginosa airway infection in the mouse model.

Chronique à long terme<em&gt; Pseudomonas aeruginosa</em&gt; Infection des voies respiratoires chez les souris

A mouse model of chronic airway infection is a key asset in cystic fibrosis (CF) research, although there are a number of concerns regarding the model ...

Complete Thymectomy in Adult Rats with Non-invasive Endotracheal Intubation

Thymectomy in neonatal rodents is an established and reliable procedure for immunological studies. However, in adult rats, complications of hemorrhage and pneumothorax from pleural disruption can result in a significant mortality rate. This protocol is a simple method of rat thymectomy that utilizes a mini-sternotomy and endotracheal intubation. Intubation is accomplished with a non-invasive and easily reproducible method and allows for positive pressure ventilation to prevent pneumothorax and a controlled airway that allows sufficient time for careful thymus dissection to minimize pleural disruption. A 1.5 cm sternal incision decreases contact with mediastinal vessels and pleura, while still providing full visualization of the thymus. Following exposure of the mediastinum, the thymus is removed by blunt dissection under magnification. The pleural space is then sealed by suture closure of the pre-tracheal muscles followed by the application of surgical glue. The thorax is then closed by suture closure of the sternum, followed by suture closure of the skin. All thymectomies were complete as evidenced by immunohistochemical (IHC) staining of mediastinal tissue, and absence of na&#239;ve T-cells by flow cytometry, and the procedure had a 96% survival rate. This method is suitable when complete thymectomy with minimal complications is desired for further immunological studies in athymic adult rats.

Rodent thymectomy is a valuable technique in immunological research. Here, a protocol for complete thymectomy in adult rats using a mini-sternotomy along with non-invasive intubation and positive pressure ventilation to minimize perioperative morbidity and mortality is described.

Thymectomie complète chez des rats adultes avec les non-invasive intubation endotrachéale

Thymectomy in neonatal rodents is an established and reliable procedure for immunological studies. However, in adult rats, complications of hemorrhage and ...

Murine Hind Limb Long Bone Dissection and Bone Marrow Isolation

Investigation of the bone and the bone marrow is critical in many research fields including basic bone biology, immunology, hematology, cancer metastasis, biomechanics, and stem cell biology. Despite the importance of the bone in healthy and pathologic states, however, it is a largely under-researched organ due to lack of specialized knowledge of bone dissection and bone marrow isolation. Mice are a common model organism to study effects on bone and bone marrow, necessitating a standardized and efficient method for long bone dissection and bone marrow isolation for processing of large experimental cohorts. We describe a straightforward dissection procedure for the removal of the femur and tibia that is suitable for downstream applications, including but not limited to histomorphologic analysis and strength testing. In addition, we outline a rapid procedure for isolation of bone marrow from the long bones via centrifugation with limited handling time, ideal for cell sorting, primary cell culture, or DNA, RNA, and protein extraction. The protocol is streamlined for rapid processing of samples to limit experimental error, and is standardized to minimize user-to-user variability.

Here we present a protocol for the dissection of hind limb long bones (femurs and tibiae) from the laboratory mouse. We further describe a rapid technique for bone marrow isolation from these bones that utilizes centrifugation for removal of bone marrow from the bone marrow space.

Murine Hind Limb os long Dissection et moelle osseuse Isolation

Investigation of the bone and the bone marrow is critical in many research fields including basic bone biology, immunology, hematology, cancer metastasis, ...

Murine Full-thickness Skin Transplantation

Murine full-thickness skin transplantation is a well-established in vivo model to study alloimmune response and graft rejection. Despite its limited application to humans, skin transplantation in mice has been widely employed for transplantation research. The procedure is easy to learn and perform, and it does not require delicate microsurgical techniques nor extensive training. Moreover, graft rejection in this model occurs in a very reproducible immunological reaction and is easily monitored by direct inspection and palpation. In addition, secondary skin transplantation with donor-matched or third-party skin grafts can be performed on more complex transplant models as an alternative and uncomplicated method to assess donor-specific tolerance. The complications are low and are in general limited to anesthesia overdose or respiratory distress after the procedure. Graft failure, on the other hand, occurs commonly as a result of poor preparation of the graft, incorrect positioning in the graft bed, or inappropriate placement of the bandage. In this article, we present a protocol for full-thickness skin transplantation in mice and describe the important steps necessary for a successful procedure.

Murine full-thickness skin transplantation is a well-established model to study rejection in an alloimmune setting. Here, we provide a tutorial of each step involved in performing a BALB/c--&#62;C57BL/6 full-thickness skin transplant.

Murine Transplantation de peau pleine épaisseur

Murine full-thickness skin transplantation is a well-established in vivo model to study alloimmune response and graft rejection. Despite its limited ...

In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients

The main concern in transplantation is to achieve specific tolerance through induction of regulatory cells. The understanding of tolerance mechanisms requires reliable models. Here, we describe models of tolerance to cardiac allograft in rat, induced by blockade of costimulation signals or by upregulation of immunoregulatory molecules through gene transfer. Each of these models allowed in vivo generation of regulatory cells such as regulatory T cells (Tregs), regulatory B cells (Bregs) or regulatory myeloid cells (RegMCs). In this manuscript, we describe two complementary protocols that have been used to identify and define in vitro and in vivo regulatory cell activity to determine their responsibility in tolerance induction and maintenance. First, an in vitro suppressive assay allowed rapid identification of cells with suppressive capacity on effector immune responses in a dose dependent manner, and can be used for further analysis such as cytokine measurement or cytotoxicity. Second, the adoptive transfer of cells from a tolerant treated recipient to a newly irradiated grafted recipient, highlighted the tolerogenic properties of these cells in controlling graft directed immune responses and/or converting new regulatory cells (termed infectious tolerance). These methods are not restricted to cells with known phenotypic markers and can be extended to any cell population. Furthermore, donor directed allospecificity of regulatory cells (an important goal in the field) can be assessed by using third party donor cells or graft either in vitro or in vivo. Finally, to determine the specific tolerogenic capacity of these regulatory cells, we provide protocols to assess the humoral anti-donor antibody responses and the capacity of the recipient to develop humoral responses against new or former known antigens. The models of tolerance described can be used to further characterize regulatory cells, to identify new biomarkers, and immunoregulatory molecules, and are adaptable to other transplantation models or autoimmune diseases in rodent or human.

In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients

Here, we present a protocol to induce tolerance in transplantation, and assess in vitro and in vivo the suppressive capacity of distinct cell subsets from the recipient and the immune status of the recipient toward donor or exogenous antigens.

In Vitro et In Vivo l’évaluation d’activité Suppressive T, B et les cellules myéloïdes et des réponses humorales de receveurs de transplantation

The main concern in transplantation is to achieve specific tolerance through induction of regulatory cells. The understanding of tolerance mechanisms ...

An Immunological Model for Heterotopic Heart and Cardiac Muscle Cell Transplantation in Rats

Heterotopic heart transplantation in rats has been a commonly used model for diverse immunological studies for more than 50 years. Several modifications have been reported since the first description in 1964. After 30 years of performing heterotopic heart transplantation in rats, we have developed a simplified surgical approach, which can be easily taught and performed without further surgical training or background.
After dissection of the ascending aorta and the pulmonary artery and ligation of superior and inferior caval and pulmonary veins, the donor heart is harvested and subsequently perfused with ice-cold saline solution supplemented with heparin. After clamping and incising the recipient abdominal vessels, the donor ascending aorta and pulmonary artery are anastomosed to the recipient abdominal aorta and inferior vena cava, respectively, using continuous running sutures.
Depending on different donor-recipient combinations, this model allows analyses of either acute or chronic rejection of allografts. The immunological significance of this model is further enhanced by a novel approach of in-ear injection of vital cardiac muscle cells and subsequent analysis of draining cervical lymphatic tissue.

We describe a model of heterotopic abdominal heart transplantation in rats, implying modifications of current strategies, which lead to a simplified surgical approach. Additionally, we describe a novel rejection model by in-ear injection of vital cardiac muscle cells, allowing further transplant immunological analyses in rats.

Un modèle immunologique pour la transplantation héterotopique de cellules cardiaques et cardiaques chez les rats

Heterotopic heart transplantation in rats has been a commonly used model for diverse immunological studies for more than 50 years. Several modifications ...

Optimization of the Cuff Technique for Murine Heart Transplantation

Murine cardiac transplantation has been performed for more than 40 years. With advancements in microsurgery, certain new techniques have been used to improve surgical efficiency. In our lab, we have optimized the cuff technique with two major steps. First, we used the inner tube technique to insert a temporary inner tube into the external jugular vein and carotid artery blood vessel to facilitate eversion of the vessel over the cuff. Second, we performed complete heterotopic cardiac transplantation through the collaboration of two experienced surgeons. These modifications effectively reduced the operation time to 25 minutes, with a success rate of 95%. In this report, we describe these procedures in detail and provide a supplemental video. We believe that this report on the improved cuff technique will offer practical guidance for murine heterotopic heart transplantation and will enhance the utility of this mouse model for basic research.

We introduce an inner tube approach to the cuff technique for mouse cervical heterotopic heart transplantation to help evert the vessel over the cuff. We found that cooperation between two experienced surgeons markedly shortens the operation time.

Optimisation de la technique de manchette pour la transplantation cardiaque murine

Murine cardiac transplantation has been performed for more than 40 years. With advancements in microsurgery, certain new techniques have been used to ...

Bone Marrow Transplantation Procedures in Mice to Study Clonal Hematopoiesis

Clonal hematopoiesis is a prevalent age-associated condition that results from the accumulation of somatic mutations in hematopoietic stem and progenitor cells (HSPCs). Mutations in driver genes, that confer cellular fitness, can lead to the development of expanding HSPC clones that increasingly give rise to progeny leukocytes harboring the somatic mutation. Because clonal hematopoiesis has been associated with heart disease, stroke, and mortality, the development of experimental systems that model these processes is key to understanding the mechanisms that underly this new risk factor. Bone marrow transplantation procedures involving myeloablative conditioning in mice, such as total-body irradiation (TBI), are commonly employed to study the role of immune cells in cardiovascular diseases. However, simultaneous damage to the bone marrow niche and other sites of interest, such as the heart and brain, is unavoidable with these procedures. Thus, our lab has developed two alternative methods to minimize or avoid possible side effects caused by TBI: 1) bone marrow transplantation with irradiation shielding and 2) adoptive BMT to non-conditioned mice. In shielded organs, the local environment is preserved allowing for the analysis of clonal hematopoiesis while the function of resident immune cells is unperturbed. In contrast, the adoptive BMT to non-conditioned mice has the additional advantage that both the local environments of the organs and the hematopoietic niche are preserved. Here, we compare three different hematopoietic cell reconstitution approaches and discuss their strengths and limitations for studies of clonal hematopoiesis in cardiovascular disease.

We describe three methods of bone marrow transplantation (BMT): BMT with total-body irradiation, BMT with shielded irradiation, and BMT method with no pre-conditioning (adoptive BMT) for the study of clonal hematopoiesis in mouse models.

Procédures de transplantation de moelle osseuse chez la souris pour étudier l’hématopoïèse clonale

Clonal hematopoiesis is a prevalent age-associated condition that results from the accumulation of somatic mutations in hematopoietic stem and progenitor ...

Purification and Expansion of Mouse Invariant Natural Killer T Cells for in vitro and in vivo Studies

Invariant Natural Killer T (iNKT) cells are innate-like T Lymphocytes expressing a conserved semi-invariant T cell receptor (TCR) specific for self or microbial lipid antigens presented by the non-polymorphic MHC class I-related molecule CD1d. Preclinical and clinical studies support a role for iNKT cells in cancer, autoimmunity and infectious diseases. iNKT cells are very conserved throughout species and their investigation has been facilitated by mouse models, including CD1d-deficient or iNKT-deficient mice, and the possibility to unequivocally detect them in mice and men with CD1d tetramers or mAbs specific for the semi-invariant TCR. However, iNKT cells are rare and they need to be expanded to reach manageable numbers for any study. Because the generation of primary mouse iNKT cell line in vitro has proven difficult, we have set up a robust protocol to purify and expand splenic iNKT cells from the iV&#945;14-J&#945;18 transgenic mice (iV&#945;14Tg), in which iNKT cells are 30 times more frequent. We show here that primary splenic iV&#945;14Tg iNKT cells can be enriched through an immunomagnetic separation process, yielding about 95-98% pure iNKT cells. The purified iNKT cells are stimulated by anti-CD3/CD28 beads plus IL-2 and IL-7, resulting in 30-fold expansion by day +14 of the culture with 85-99% purity. The expanded iNKT cells can be easily genetically manipulated, providing an invaluable tool to dissect mechanisms of activation and function in vitro and, more importantly, also upon adoptive transfer in vivo.

We describe a rapid and robust protocol to enrich invariant natural killer T (iNKT) cells from mouse spleen and expand them in vitro to suitable numbers for in vitro and in vivo studies.

Purification et expansion de cellules T tueuses naturelles invariantes de souris pour des études in vitro et in vivo

Invariant Natural Killer T (iNKT) cells are innate-like T Lymphocytes expressing a conserved semi-invariant T cell receptor (TCR) specific for self or ...