An In Vitro Method to Identify Innate and Adaptive Immune Cells Residing in Murine Lungs

Published: April 30, 2024

Abstract

Source: Christofides, A., et al. Flow Cytometric Analysis for Identification of the Innate and Adaptive Immune Cells of Murine Lung. J. Vis. Exp. (2021).

This video demonstrates an in vitro technique to identify immune cells residing in murine lungs. After isolating target immune cells from murine lung tissue, they are surface-labeled using a cocktail of fluorophore-tagged antibodies against specific markers on innate and adaptive immune cells. Additionally, monocytes, macrophages, and dendritic cells are labeled using an intracellular marker. The various immune cell types are then identified using flow cytometry.

Protocol

All procedures involving animal models have been reviewed by the local institutional animal care committee and the JoVE veterinary review board. 1. Surgical excision and tissue preparation Euthanize the mouse by intraperitoneally injecting 1 mL of tribromoethanol (prepared according to standard protocol; Table of Materials). NOTE: CO2 asphyxiation should be avoided in lung studies as it might cause lung …

Representative Results

Figure 1: The best cellular dissociation is achieved by 5 mg/mL of collagenase 1 in prewarmed PBS + 0.5% BSA. In all different conditions, 0.2 mg of DNAse I was also included. Abbreviations: BSA = bovine serum albumin; FSC-A = peak area of forward-scattered light; L/D = live/dead staining; SF = Siglec F.

Divulgations

The authors have nothing to disclose.

Materials

10 mL syringe plunger EXELINT 26265
18 G needles BD Precision Glide Needle 305165
21 G needles BD Precision Glide Needle 305195
50 mL conical tubes Falcon 3520
70 μm cell strainer ThermoFisher 22363548
96-well plates Falcon/corning 3799
ACK Lysing Buffer ThermoFisher A10492-01
anti-mouse CD11b Biolegend 101215 For details see Table 2
anti-mouse CD11c Biolegend 117339 / 117337 For details see Table 2
anti-mouse CD45 Biolegend 103115 For details see Table 2
anti-mouse CD64 Biolegend 139319 For details see Table 2
anti-mouse CD68 Biolegend 137009 For details see Table 2
anti-mouse GR-1 Biolegend 108433 For details see Table 2
anti-mouse Siglec F Biolegend 155503 For details see Table 2
AVERTIN Sigma-Aldrich 240486
B220 Biolegend 103228 For details see Table 2
Bovine Serum Albumin (BSA) Sigma-Aldrich 9048-46-8
CD103 Biolegend 121405 / 121419 For details see Table 2
CD24 Biolegend 138503 For details see Table 2
CD3 Biolegend 100205 For details see Table 2
Centrifuge
Collagenase Type 1 Worthington Biochemical Corp LS004196
CX3CR1 Biolegend 149005 For details see Table 2
DNase I Millipore Sigma 10104159001
Ethanol
F4/80 Biolegend 123133 For details see Table 2
FcBlock (CD16/32) Biolegend 101301 For details see Table 2
Fetal Bovine Serum R&D Systems
Fine Serrated Forceps Roboz Surgical Instrument Co
Foxp3 / Transcription Factor Staining Buffer Set ThermoFisher 00-5523-00
Futura Safety Scalpel Merit Medical Systems SMS210
Live/Dead Fixable Far Read Dead Cell Stain Kit ThermoFisher L34973 For details see Table 2
MERTK Biolegend 151505 For details see Table 2
MHC-II Biolegend 107621 For details see Table 2
NK1.1 Biolegend 108705 For details see Table 2
Orbital Shaker VWR Model 200
Petri dish Falcon 351029
Refrigerated benchtop centrifuge SORVAL ST 16R
Small curved scissor Roboz Surgical Instrument Co

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Citer Cet Article
An In Vitro Method to Identify Innate and Adaptive Immune Cells Residing in Murine Lungs. J. Vis. Exp. (Pending Publication), e22141, doi: (2024).

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