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Protocol for analyzing arginase I expression in tumor-associated myeloid-derived suppressor cells from murine colon
Amin Zakeri1, Keman Zhang1, Li Lily Wang2
1Department of Translational Hematology and Oncology Research, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, USA.
Abstract:
Arginase1 (ARG1) is a metabolic enzyme that is highly expressed in tumor-associated myeloid-derived suppressor cells (MDSCs) and causes the dysfunction of tumor-reactive T cells. Here, we present a protocol for detecting ARG1 expression in tumor MDSCs from a murine model of colon cancer using flow cytometry. We describe steps for tumor tissue processing, antibody staining, and data acquisition. We then detail procedures for identifying MDSC subsets and detecting ARG1 expression using a precise gating strategy. For complete details on the use and execution of this protocol, please refer to Zhang et al.1.
Insights
This study details a flow cytometry protocol to detect Arginase1 (ARG1) in colon cancer myeloid-derived suppressor cells (MDSCs). This method helps understand ARG1
Area of Science:
- Immunology
- Cancer Biology
- Biochemistry
Background:
- Arginase1 (ARG1) is a key enzyme in myeloid-derived suppressor cells (MDSCs).
- High ARG1 expression in tumor-associated MDSCs impairs anti-tumor T cell function.
- Understanding ARG1 in tumor MDSCs is crucial for cancer immunotherapy.
Purpose of the Study:
- To present a detailed flow cytometry protocol for ARG1 detection in murine colon cancer MDSCs.
- To provide a reliable method for quantifying ARG1 expression within specific MDSC subsets.
Main Methods:
- Tumor tissue processing from a murine colon cancer model.
- Antibody staining for cell surface markers and intracellular ARG1.
- Flow cytometry for data acquisition and precise gating strategy for MDSC subset identification.
Main Results:
- A comprehensive protocol for ARG1 detection in tumor MDSCs is established.
- The protocol allows for accurate identification of MDSC subsets expressing ARG1.
- This method facilitates the study of ARG1's role in T cell suppression within the tumor microenvironment.
Conclusions:
- The presented protocol enables robust detection and quantification of ARG1 in tumor-associated MDSCs.
- This method is valuable for investigating the mechanisms of immune suppression in cancer.
- Further research can utilize this protocol to explore ARG1-targeted therapeutic strategies.
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