Summary

Induzione di Murine infiammazione intestinale per trasferimento adottivo di Effector CD4<sup> +</sup> CD45RB<sup> Alto</sup> T Cells in topi immunodeficienti

Published: April 21, 2015
doi:

Summary

Here, we present a protocol to induce colonic inflammation in mice by adoptive transfer of syngeneic CD4+CD45RBhigh T cells into T and B cell deficient recipients. Clinical and histopathological features mimic human inflammatory bowel diseases. This method allows the study of the initiation of colonic inflammation and progression of disease.

Abstract

Ci sono molti modelli animali differenti disponibili per lo studio della patogenesi delle malattie infiammatorie croniche intestinali umane (IBD), ognuno con i suoi vantaggi e svantaggi. Descriviamo qui un modello di colite sperimentale che è iniziata da trasferimento adottivo di cellule della milza alta T CD4 + CD45RB singenici in T e cellule B topi riceventi deficienti. La popolazione di cellule T CD4 + alta CD45RB che consiste in gran parte di cellule effettrici naïve è in grado di indurre infiammazione intestinale cronica, molto simili aspetti chiave di IBD umana. Questo metodo può essere manipolato per studiare gli aspetti di insorgenza della malattia e la progressione. Inoltre può essere utilizzata per studiare la funzione di innata, adattabile e popolazioni regolamentazione cellule immunitarie, e il ruolo delle esposizioni ambientali, cioè, il microbiota, infiammazione intestinale. In questo articolo si illustra il metodo per indurre la colite con un protocollo passo-passo. Questo incLudes un video dimostrativo di aspetti tecnici chiave necessari per sviluppare con successo questo modello murino di colite sperimentale per scopi di ricerca.

Introduction

The inflammatory bowel diseases (IBD) Crohn’s disease and ulcerative colitis result from an incompletely defined and complex interaction between host immune responses, genetic susceptibility, environmental factors, and the enteric luminal contents1. Recent genome-wide association studies report associations between immune cell regulatory genes and IBD susceptibility2,3. Both innate and adaptive immune cell intrinsic genes are represented in these studies, indicating a central role for these cell populations in IBD pathogenesis.

There currently exist more than 50 animal models of human IBD. While no one model perfectly phenocopies human IBD, many are useful for studying various aspects of human disease, including disease onset and progression and the wound-healing response. In the method described here, intestinal inflammation is initiated with syngeneic splenic CD4+CD45RBhigh T cell adoptive transfer into T and B cell deficient recipient mice4. The CD4+CD45RBhigh T cell population contains mainly naïve T cells primed for activation that are capable of inducing chronic small bowel and colonic inflammation. This method allows the researcher to modify key experimental variables, including both innate and adaptive immune cell populations, to answer biologically relevant questions relating to disease pathogenesis. Additionally, this method provides precise initiation of disease onset and a well-characterized experimental time course. This permits the kinetic study of clinical features of disease progression in mice. Intestinal inflammation induced by this method shares many features with human IBD, including chronic large and small bowel transmural inflammation, pathogenesis driven by cytokines such as TNF and IL-12, and systemic symptoms such as wasting5. Thus, it is an ideal model system for studying the pathogenesis of human IBD.

The method here describes in detail the protocol for inducing experimental colitis by adoptive transfer of CD4+CD45RBhigh T cells into Rag1-/- mice. We discuss key technical steps, expected results, optimization, and trouble-shooting. We address the required elements for the successful development of this murine model of intestinal inflammation for research purposes.

Protocol

NOTA: Assicurarsi che tutti i protocolli animali sono approvati dal e nel rispetto Istituzionale Animal Care and Use Committee (IACUC) regolamenti e guida del Consiglio Nazionale delle Ricerche per la cura e l'uso di animali da laboratorio. Topo donatore può essere maschio o femmina, ma topi riceventi devono essere di sesso maschile. Se i destinatari femmina devono essere utilizzati, i topi donatori devono essere femmina 5. Mantenere le colonie con regolare, biancheria da letto non ster…

Representative Results

Circa 10 x 10 6 CD4 + CD45RB cellule di alta T da 10 milza di adulti C57BL / 6 topi donatori sono affidabile isolati. Questo numero varia a seconda dell'età e la tensione del mouse donatore e la competenza del ricercatore. Quando 4 x 10 5 C57BL / 6 celle ad alta T CD4 + CD45RB vengono trasferiti in C57BL / 6 Rag1 – / – topi riceventi, i segni clinici della malattia emergono intorno settimana 5 post-sazietà o prima, se i topi sono…

Discussion

Qui si descrive un protocollo step-by-step indurre infiammazione del colon nei topi mediante trasferimento adottivo di cellule CD4 + T + CD45RB in topi immunodeficienti. Abbiamo usato milza C57BL / 6 donatori e Rag1 singenico – / – topi riceventi, anche se altri ceppi (ad esempio, BALB / c, 129S6 / SvEv, non-obesi diabetici (NOD)) Modelli e genetici di immunodeficienza (ad esempio, SCID, Rag2 – / -) può essere utilizzato anche 4,14-16….

Disclosures

The authors have nothing to disclose.

Acknowledgements

Questo lavoro è stato sostenuto da Gastroenterologiche American Association (AGA) Research Scholars Award e morbo di Crohn e Colite Foundation of America (CCFA) Career Development Award (a SOI), NIH NIDDK F30 DK089692 (ECS), e University of North Carolina Centro di Biologia gastrointestinale e la malattia di Grant P30 DK34987 (Istologia Core). Il Fondo UNC Citometria a flusso Core è sostenuto in parte da un nucleo di supporto NSC Centro Grant (P30CA016086) alla UNC Lineberger Comprehensive Cancer Center. Ringraziamo Luca B. Borst da North Carolina State University College di Medicina Veterinaria per il suo aiuto con analisi istopatologica e immunoistochimica.

Materials

Name of Reagent/ Equipment Company Catalog Number Comments/Description
10x PBS Gibco 14200075
12x75mm round-bottom tube Falcon 352052
15 ml conical Corning 430790
26g x 3/8 Needle BD Biosciences 305110
50 ml conical Corning 430828
70 um Cell Strainer Fisherbrand 22363548
BD IMagnet BD Biosciences 552311
β-mercaptoethanol Thermo Scientific 35602
CD4-FITC IgG2b eBioscience 11-0041
CD45RB-PE IgG2a BD Pharminogen 553101
Complete Media RPMI-1640, 1% Pen/Strep, 10% FBS, 0.0004% β-ME
FACS tube + strainer BD Falcon 352235
Glass Microscope Slides Fisherbrand 12550A3
Heat-inactivated FBS Gemini 100-106
Labeling Buffer 1x PBS, 0.5% BSA, 2 mM EDTA
Lysis Buffer 0.08% NH4Cl, 0.1% KHCO3, 1 mM EDTA
MoFlo XDP Beckman Coulter
Mouse CD4 T lymphocyte Enrichment Set – DM BD Biosciences 558131
Mouse IgG2a-PE BD Pharminogen 553457
Mouse IgG2b-FITC eBioscience 11-4732
Pasteur pipet Fisherbrand 13-678-20D
Penicillin-Streptomycin Solution, 100X Corning Cellgro 30-002-CI
Petri Dish Fisherbrand 875713
Pure Ethanol 200 Proof Decon Labs 2705-HC
RPMI-1640 Gibco 11-875-093
Syringe BD Biosciences 309597
Trypan blue Corning Cellgro 25-900-CI
Wash Media RPMI-1640, 1% Pen/Strep, 0.0004% β-ME

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Cite This Article
Steinbach, E. C., Gipson, G. R., Sheikh, S. Z. Induction of Murine Intestinal Inflammation by Adoptive Transfer of Effector CD4+CD45RBhigh T Cells into Immunodeficient Mice. J. Vis. Exp. (98), e52533, doi:10.3791/52533 (2015).

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