A Double-Labeling Immunofluorescence Technique to Visualize Host and Pathogen Proteins in an Infected Cell
Published: March 29, 2024
Abstract
Source: Gachet-Castro, C. et al., Double Labeling Immunofluorescence using Antibodies from the Same Species to Study Host-Pathogen Interactions. J. Vis. Exp. (2021)
This video showcases double-labeling immunostaining with two different primary antibodies raised in the same species, binding specifically to parasite and host proteins. Furthermore, labeled secondary antibodies targeting these primary antibodies allow the distinct visualization of host and parasite proteins, facilitating the study of host-pathogen interaction.
Protocol
1. Cell and parasite cultures Grow LLC-MK2 (Rhesus Monkey Kidney Epithelial) cells from the American Type Culture Collection (CCL-7) in a 25 cm2 cell culture flask containing in Roswell Park Memorial Institute (RPMI) medium supplemented with 10% heat-inactivated FBS (Fetal Bovine Serum) and antibiotics (100 U/mL Penicillin and 100 µg/mL Streptomycin) at 37 °C in 5% carbon dioxide (CO2). Infect LLC-MK2 cells with Trypanosoma cruzi…
Disclosures
The authors have nothing to disclose.
Materials
| Alexa Fluor 488 – IgG2b antibody | Life technologies, USA | A21141 | Goat anti-mouse |
| AffiniPure Rabbit anti-mouse IgG (H+L) | Jackson Immunoresearch, USA | 315-005-003 | Anti-mouse antibody |
| Alexa Fluor 488 – IgG F (ab')2 (H+L) antibody | Life technologies, USA | A11017 | Goat anti mouse |
| Alexa Fluor 594 IgG1 antibody | Life technologies, USA | A21125 | Goat anti-mouse |
| Alexa Fluor 647 – IgG F (ab')2 (H+L) antibody | Life technologies, USA | A21237 | Goat anti-mouse |
| Anti-hnRNPA1 antibody IgG2b | Sigma-Aldrich, USA | R4528 | Mouse antibody |
| anti-TcFAZ (T. cruzi FAZ protein) antibody | Our lab | In-house | Mouse antibody |
| Bovine Serum Albumin (BSA) | Sigma-Aldrich, USA | A2153-10G | Albumin protein |
| Detergent Igepal CA-630 | Sigma-Aldrich, USA | I3021 | Nonionic Detergent |
| Fetal Bovine Serum (FBS) | Gibco, Thermo fisher scientific, USA | 12657-029 | Serum |
| Penicillin Streptomycin | Gibco, Thermo fisher scientific, USA | 15140-122 | Antibiotic |
| Phalloidin Alexa Fluor 594 | Life technologies, USA | A12381 | Actin marker |
| ProLong Gold antifade with DAPI | Life technologies, USA | P36935 | Mounting media reagent |
| RPMI 1640 1X with L-glutamine | Corning, USA | 10-040-CV | Cell culture media |
| Trypsin-EDTA solution | Sigma-Aldrich, USA | T4049-100ML | Bioreagent |
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Cite This Article
A Double-Labeling Immunofluorescence Technique to Visualize Host and Pathogen Proteins in an Infected Cell. J. Vis. Exp. (Pending Publication), e22104, doi: (2024).