Using Fluorescence-Mediated Tomography to Assess Murine Intestinal Inflammation
Published: April 30, 2024
Abstract
Source: Nowacki, T. M., et al. Fluorescence-mediated Tomography for the Detection and Quantification of Macrophage-related Murine Intestinal Inflammation. J. Vis. Exp. (2017)
This video demonstrates a technique for assessing intestinal macrophage infiltration in a murine model of colitis using fluorescence-mediated tomography (FMT). Upon inducing colitis in a mouse via dextran sodium sulfate (DSS), the animal is injected with antibodies that recognize the F4/80 glycoprotein marker on infiltrated macrophages in the colon. The mouse is then imaged in an FMT device where the fluorescence and reflectance signals are reconstructed into a three-dimensional image to determine the spatial distribution and intensity of fluorescence.
Protocol
All procedures involving animal models have been reviewed by the local institutional animal care committee and the JoVE veterinary review board. 1. Materials and Experimental Setup Animal care. Use sex- and age-matched mice of any DSS-susceptible strain (e.g., C57BL/6) at 20-25 g body weight. Plan at least five or more mice per experimental group and house the mice according to local animal care guidelines. <l…
Representative Results
Figure 1. Tomographic visualization of macrophage infiltrates in murine colitis. FMT scans in colitic mice and non-colitic controls administered Cyanine7-conjugated antibody against murine F4/80 (n = 5 per group). (A) Bar graph: total fluorescence intensity in pmol of dye was determined in the ROI and depicted ± SEM. Representative image…
Divulgazioni
The authors have nothing to disclose.
Materials
| Reagents | |||
| Alfalfa-free diet | Harlan Laboritories, Madison, USA | 2014 | |
| Bepanthen eye ointment | Bayer, Leverkusen, Germany | 80469764 | |
| Dextran sulphate sodium (DSS) | TdB Consulatancy, Uppsala, Sweden | DB001 | |
| Eosin | Sigma – Aldrich, Deisenhofen, Germany | E 4382 | |
| Ethylenediaminetetraacetic acid (EDTA) | Sigma – Aldrich, Deisenhofen, Germany | E 9884 | |
| Florene 100V/V | Abbott, Wiesbaden, Germany | B506 | |
| Haematoxylin | Sigma – Aldrich, Deisenhofen, Germany | HHS32-1L | |
| O.C.T. Tissue Tek compound | Sakura, Zoeterwonde, Netherlands | 4583 | fixative for histological analyses |
| Phosphate buffered saline, PBS | Lonza, Verviers, Belgium | 4629 | |
| Sodium Chloride 0,9% | Braun, Melsungen, Germany | 5/12211095/0411 | |
| Sodium bicarbonate powder | Sigma Aldrich Deisenhofen, Germany | S5761 | |
| Standard diet | Altromin, Lage, Germany | 1320 | |
| Tissue-Tek Cryomold | Sakura, Leiden, Netherlands | 4566 | |
| Hemoccult (guaiac paper test) | Beckmann Coulter, Germany | 3060 | |
| Biotin rat-anti-mouse anti-F4/80 antibody | Serotec, Oxford, UK | MCA497B | |
| Biotin rat-anti-mouse anti-GR-1 | BD Pharmingen, Heidelberg Germany | 553125 | |
| Streptavidin-Alexa546 | Molecular Probes, Darmstadt, Germany | S-11225 | excitation/emission maximum: 556/573nm |
| Anti-CD11b rat-anti-mouse antibody TC | Calteg, Burlingame, USA | R2b06 | |
| Purified anti-mouse F4/80 antibody | BioLegend, London, UK | 123102 | |
| DAPI | Sigma-Aldrich, Deisenhoffen, Germany | D9542 | |
| FITC-conjugated anti-Ly6C rat-anti-mouse antibody | BD Pharmingen, Heidelberg, Germany | 553104 | |
| FACS buffer | BD Pharmingen, Heidelberg, Germany | 342003 | |
| Cy7 NHS Ester | GE Healthcare Europe, Freiburg, Germany | PA17104 | |
| MPO ELISA | Immundiagnostik AG, Bensheim, Germany | K 6631B | |
| Cy5.5 labeled anti-mouse F4/80 antibody | BioLegend, London, UK | 123127 | ready to use labelled Antibodies (alternative) |
| Anti-Mouse F4/80 Antigen PerCP-Cyanine5.5 | eBioscience, Waltham, USA | 45-4801-80 | ready to use labelled Antibodies (alternative) |
| DMSO (Dimethyl sulfoxide) | Sigma-Aldrich, Deisenhoffen, Germany | 67-68-5 | |
| Isoflurane | Sigma-Aldrich, Deisenhoffen, Germany | 792632 | |
| Ethanol | Sigma-Aldrich, Deisenhoffen, Germany | 64-17-5 | |
| Bovine Serum Albumins (BSA) | Sigma-Aldrich, Deisenhoffen, Germany | A4612 | |
| Tris Buffered Saline Solution (TBS) | Sigma-Aldrich, Deisenhoffen, Germany | SRE0032 | |
| Equipment | |||
| FACS Calibur Flow Cytometry System | BD Biosciences GmbH, Heidelberg, Germany | ||
| FMT 2000 In Vivo Imaging System | PerkinElmer Inc., Waltham, MA, USA | FMT2000 | |
| True Quant 3.1 Imaging Analysis Software | PerkinElmer Inc., Waltham, MA, USA | included in FMT2000 | |
| Leica DMLB Fluorescent Microscope | Leica, 35578 Wetzlar, Germany | DMLB | |
| Bandelin Sonopuls HD 2070 | Bandelin, 12207 Berlin, Germany | HD 2070 | ultrasonic homogenizer |
| Disposable scalpel No 10 | Sigma-Aldrich, Deisenhoffen, Germany | Z692395-10EA | |
| Metzenbaum scissors 14cm | Ehrhardt Medizinprodukte GmbH, Geislingen, Germany | 22398330 | |
| luer lock syringe 5ml | Sigma-Aldrich, Deisenhoffen, Germany | Z248010 | |
| syringe needles | Sigma-Aldrich, Deisenhoffen, Germany | Z192368 | |
| Falcon Tube 50ml | BD Biosciences, Erembodegem, Belgium | 352070 |
Tags
Citazione di questo articolo
Using Fluorescence-Mediated Tomography to Assess Murine Intestinal Inflammation. J. Vis. Exp. (Pending Publication), e22112, doi: (2024).