Summary

炎症真皮における撮像CD4 T細胞間質への移行

Published: March 25, 2016
doi:

Summary

炎症部位でのCD4エフェクターT細胞の間質運動を支配するメカニズムは、比較的知られていません。我々は、in vitroで視覚化して操作するための非侵襲的なアプローチは、その場でこれらの細胞の動的挙動の研究を可能にする、炎症を起こした耳の真皮中のCD4 T細胞を-primed提示します。

Abstract

エフェクター機能を実行するCD4 T細胞の能力は、未未定義の機構を介して炎症の末梢組織におけるこれらの細胞の迅速かつ効率的な移行に依存します。免疫系の研究に多光子顕微鏡の応用は、無傷の組織内の免疫応答の動態を測定するためのツールを提供しています。ここでは、炎症を起こしたマウス耳真皮におけるCD4 T細胞の非侵襲的な生体内多光子イメージングのためのプロトコルを提示します。カスタムイメージングプラットフォームの使用及び静脈カテーテルは、運動性に関与する重要な分子成分に対する抗体をブロッキング添加によってリアルタイムでこれらの細胞に問い合わせする能力を、皮膚間質におけるCD4 T細胞の動態の可視化を可能にします。このシステムは、in vitroモデルおよび外科的侵襲的な画像化手順の両方に勝る利点を提供します。運動のためのCD4 T細胞によって使用される経路を理解することは、最終的にバシへの洞察を提供することができますCのCD4 T細胞の機能だけでなく、慢性感染症からの両方の自己免疫疾患の病因と病理。

Introduction

The effector function of CD4 T cells is critically dependent on their ability to rapidly enter and traverse a wide variety of peripheral tissues to survey for damage, locate foci of infection, or cause pathology from chronic infection or autoimmunity. While the processes of homing to inflamed sites1-4 and extravasation5-7 from the vasculature into tissues have been well-characterized, the factors that drive and regulate the interstitial motility of T cells remain undefined. The migration of T cells in complex 3D environments has been studied in vitro through the use of artificial matrices8-10 or microfluidic devices11,12, but these fail to recapitulate the complex and dynamic environment of an in vivo system. It is only recently, with the advent of high-resolution multi-color intravital imaging that it has become possible to study the dynamic behavior of immune cells in situ, allowing for a better understanding of intact immune responses.

Over a decade ago, several influential studies were published that first utilized multiphoton microscopy to address immunological questions. Early studies focused on the behavior of immune cells within explanted lymphoid organs13-16, which were soon followed by techniques to image exposed lymph nodes in anesthetized mice17. Imaging allowed for new fundamental observations about the stages of lymph node priming of T cells18, the mechanisms by which T cells migrate in secondary lymphoid organs19, T cell interactions with other immune cells20,21, and dynamic T cell positioning within the lymph node22. Although many early studies focused on lymph node dynamics, intravital imaging has been since been utilized to image the immune response in many peripheral tissues, including the brain23-25, liver26, lung27, and skin28-30.

The mouse ear dermis is particularly well poised for imaging, due to the thinness of ear skin, a relative lack of hair, and the ease with which it can be isolated from respiratory movements31. Indeed, the ear dermis has been used to image the interstitial behavior of dendritic cells32,33, T cells28,29,34,35, and neutrophils36,37, and is a well-established site for studying dermal inflammation. Increasingly, non-invasive procedures have been replacing surgical preparations of the skin, including split dermis38,39, flank39,40, or dorsal skin flap window39,41 models, that can induce changes to the local inflammatory milieu. The use of transferred, in vitro-primed, antigen-specific CD4 effector T cells allows for the study of a homogenous population of cells in the context of a dermal inflammatory response30. Here we describe a non-invasive imaging procedure that allows for the visualization of antigen-specific effector CD4 T cells in the dermal interstitium of the inflamed mouse ear, and the ability to manipulate these cells in real-time by introducing blocking antibodies through a venous catheter. We show that this model is effective for tracking the movement of CD4 T cells in the dermis and for querying the mechanisms that govern this motility.

Protocol

マウスを含むすべての手順は、ロチェスター大学の施設内動物管理使用委員会によって承認され、国立研究所によって投与動物福祉法と動物愛護実験動物の管理と使用に関する公衆衛生サービスポリシーに厳密に従って行きました健康、実験動物福祉のオフィスの。 エフェクターCD4 T細胞の調製注:特に鶏卵卵白アルブミン(:ISQAVHAAHAEINEAGR pOVA)由来…

Representative Results

免疫環境を変更することなく、 その場での免疫応答を研究する能力は、炎症組織でTエフェクター細胞のリアルタイム相互作用の研究に不可欠です。 図1AおよびBで概説し、このプロトコルにより、無傷の耳の真皮のイメージングは、皮膚の間質における転送蛍光標識されたTエフェクター細胞の可視化を可能にします。これは、高解像?…

Discussion

意義

ここでは、無傷のマウス耳真皮における転送、抗原特異的なエフェクターTh1細胞の4D可視化のための完全なプロトコルを提示します。この方法は、いくつかの理由のために、いくつかの現在の撮像モダリティ上の利点を提供します。腹側の耳の真皮を画像化することによって、我々は他の皮膚部位を含むイメージング・プロトコルのために必要とされる脱毛?…

Divulgazioni

The authors have nothing to disclose.

Acknowledgements

著者は、ライブイメージングのヘルプのためのロチェスター大学の多光子顕微鏡中核施設に感謝します。 DJFにNIH AI072690とAI02851によってサポートされています。 MGOへAGおよびAI089079にAI114036。

Materials

BALB/c mice Jackson Laboratories 000651 Mice used were bred in-house
DO11.10 mice Jackson Laboratories 003303 Mice used were bred in-house
HBSS Fisher 10-013-CV Multiple Equivalent
Newborn Calf Serum (NCS) Thermo/HyClone SH30118.03 Heat inactivated at 56 °C for 30 minutes
Guinea Pig Complement Cedarlane CL-5000
anti-CD8 antibody ATCC 3.155 (ATCC TIB-211) Antibodies derived from  this hybridoma
anti-MHC Class II antibody ATCC M5/114.15.2 (ATCC TIB-120) Antibodies derived from  this hybridoma
anti-CD24 antibody ATCC J11d.2 (ATCC TIB-183) Antibodies derived from  this hybridoma
anti-Thy1.2 antibody ATCC J1j.10 (ATCC TIB-184) Antibodies derived from  this hybridoma
Ficoll (Fico/Lite-LM) Atlanta Biologicals I40650
PBS Fisher 21-040-CV Multiple Equivalent
EDTA Fisher 15323591
biotinylated anti-CD62L antibody (clone MEL-14) BD 553149
streptavidin magnetic separation beads Miltenyi 130-048-101
MACS LS Separation Column Miltenyi 130-042-401
recombinant human IL-2 Peprotech 200-02
recombinant mouse IL-4 Peprotech 214-14
recombinant mouse IL-12 Peprotech 210-12
anti-IFNg antibody (clone XMG 1.2) eBioscience 16-7311-85
anti-IL-4 antibody (clone 11b11) eBioscience 16-7041-85
RPMI VWR 45000-412
Penicillin/Streptomycin Fisher 15303641
L-glutamine Fisher 15323671
2-mercaptoethanol Bio-Rad 161-0710
ovalbumin peptide Biopeptide ISQAVHAAHAEINEAGR-OH peptide
Fetal Calf Serum (FCS) Thermo/HyClone SV30014.03 Heat inactivated at 56 °C for 30 minutes
24-well culture plate LPS 3526 Multiple Equivalent
CFSE Life Technologies C34554
CMTMR Life Technologies C2927
28 G1/2 insulin syringes, 1ml BD 329420
28 G1/2 insulin syringes, 300μl BD 309301
27 G1/2 TB syringes, 1ml BD 309623
30 G1/2 needles BD 305106
PE-10 medical tubing BD 427400
cyanoacrylate veterinary adhesive (Vetbond) 3M 1469SB
heating plate WPI 61830
Heating plate controller WPI ATC-2000
Water blanket controller Gaymar TP500 No longer in production, newer equivalent available
water blanket Kent Scientific TP3E
Isoflurane vaporizer LEI Medical Isotec 4 No longer in production, newer equivalent available
isoflurane Henry Schein Ordered through Veterinary staff
microcentrifuge tubes VWR 20170-038 Multiple Equivalent
medical tape 3M 1538-0
isoflurane nosecone Built In-house, see Fig 2
imaging platform Built In-house, see Fig 2
curved forceps WPI 15915-G Multiple Equivalent
scissors Roboz RS-6802 Multiple Equivalent
glass coverslips VWR Multiple Equivalent
high vacuum grease Fisher 146355D
cotton swabs Multiple Equivalent
delicate task wipes Fisher 34155 Multiple Equivalent
Olympus Fluoview 1000 AOM-MPM upright microscope with Spectra-Physics MaiTai HP DeepSee Ti:Sa laser Olympus call for quote
optical table with vibration control Newport call for quote
25x NA 1.05 water immersion objective for multiphoton imaging Olympus XLPLN25XWMP2
objective heater Bioptechs PN 150815
Detection filter cube Olympus FV10-MRVGR/XR Proprietary cube, can be approximated from individual filters/dichroics
anti-integrin β1 antibody (clone hMb1-1) eBioscience 16-0291-85 Azide free, low endotoxin
anti-integrin β3 antibody (clone 2C9.G3) eBioscience 16-0611-82 Azide free, low endotoxin
Texas Red Dextran (70,000 MW) Life Technologies D-1830

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Gaylo, A., Overstreet, M. G., Fowell, D. J. Imaging CD4 T Cell Interstitial Migration in the Inflamed Dermis. J. Vis. Exp. (109), e53585, doi:10.3791/53585 (2016).

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