Related Experiment Video
Updated: Feb 17, 2026
Live-cell Video Microscopy of Fungal Pathogen Phagocytosis
Published on: January 9, 2013
In vitro Analysis for Macrophage Binding and Pro-inflammatory Responses to Candida albicans
1Department of Immunology and Infectious Diseases, Harvard School of Public Health, Harvard University, Boston, USA.
Abstract:
Macrophage recognition of Candida albicans (C. albicans) is facilitated by pattern recognition receptors that interact with the fungal pathogen associated molecular patterns (PAMPs). Dectin-1 is the major macrophage receptor that is known to recognize fungal Beta-glucans leading to induction of various immune responses. This receptor is also known to be required for in vivo protection against C. albicans (Taylor et al., 2007). We recently showed that the Dectin-1 mediated protection in vivo is strain-dependent, and that C. albicans can adapt to modulate immune recognition by Dectin-1 (Marakalala et al., 2013). In vitro analysis, however, showed a Dectin-1-dependent and pro-inflammatory responses against all strains tested. This protocol describes in detail the in vitro analysis used in the paper. In particular, methods involved in fluorescent labeling of live C. albicans, quantification of macrophage binding of the pathogen, and pro-inflammatory responses to yeast and hyphal forms of the fungi are described.
Insights
This study details in vitro methods for analyzing macrophage interactions with Candida albicans. It focuses on Dectin-1
Area of Science:
- Immunology
- Microbiology
- Cell Biology
Background:
- Macrophage pattern recognition receptors, like Dectin-1, bind fungal PAMPs.
- Dectin-1 recognizes Beta-glucans on Candida albicans, initiating immune responses.
- Dectin-1 is crucial for in vivo protection against C. albicans.
Purpose of the Study:
- To detail in vitro methods for assessing C. albicans recognition by macrophages.
- To analyze Dectin-1-dependent pro-inflammatory responses to C. albicans.
- To describe techniques for quantifying fungal binding and immune activation.
Main Methods:
- Fluorescent labeling of live Candida albicans.
- Quantification of macrophage-pathogen binding.
- Assessment of pro-inflammatory cytokine induction by yeast and hyphal forms.
Main Results:
- In vitro studies reveal Dectin-1-dependent pro-inflammatory responses to all C. albicans strains.
- Macrophage binding and immune activation by C. albicans were quantified.
- Methods allow for detailed analysis of fungal recognition pathways.
Conclusions:
- The described in vitro methods facilitate the study of Dectin-1-mediated immunity against Candida albicans.
- Understanding these interactions is key to developing effective antifungal strategies.
- This protocol supports research into host-pathogen dynamics in fungal infections.
