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Updated: Jun 13, 2026
Quantification of Efferocytosis by Single-cell Fluorescence Microscopy
Published on: August 18, 2018
Measuring efferocytosis by intraperitoneal clearance assay.
Caitlin L Vella1, Dilara C Ozkocak2, Amy A Baxter1
1La Trobe Institute for Molecular Science, Department of Biochemistry & Chemistry, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia; School of Agriculture, Biomedicine and Environment, Centre for Cardiovascular Biology and Disease Research, La Trobe University, Bundoora, VIC, Australia.
This study introduces an in vivo method to measure efferocytosis, the process of clearing apoptotic cells. The intraperitoneal clearance assay in mice offers a more accurate assessment of this vital immune function in a physiological context.
Area of Science:
- Immunology
- Cell Biology
- Physiology
Background:
- Efferocytosis, the clearance of apoptotic cells by phagocytes, is crucial for immune tolerance and tissue homeostasis.
- In vitro assays for efferocytosis lack the complexity of the in vivo physiological environment.
- A need exists for robust, in vivo methods to study efferocytosis.
Purpose of the Study:
- To present a detailed in vivo approach for assessing efferocytosis by mouse peritoneal macrophages.
- To enable quantification of apoptotic cell uptake in a native tissue context.
- To provide a framework for investigating interventions affecting efferocytic capacity.
Main Methods:
- Utilized an intraperitoneal (IP) clearance assay in mice.
- Administered fluorescently labeled apoptotic Jurkat T cells into the peritoneal cavity.
- Quantified apoptotic cell uptake by peritoneal macrophages in vivo.
Main Results:
- The IP clearance assay allows for the quantification of efferocytosis in a native tissue environment.
- This method captures the influence of local immune signals, stromal interactions, and systemic factors.
- The protocol is adaptable for genetic and pharmacological manipulations.
Conclusions:
- The described in vivo approach provides a physiologically relevant framework for studying efferocytosis.
- This method enhances understanding of efferocytosis in both homeostatic and pathological settings.
- It facilitates research into the regulation and dysfunction of apoptotic cell clearance.
