EGF-like module-containing mucin-like hormone receptor-like 1 also known as F4/80 is a protein encoded by the ADGRE1 gene. EMR1 is a member of the adhesion GPCR family. Adhesion GPCRs are characterized by an extended extracellular region often possessing N-terminal protein modules that is linked to a TM7 region via a domain known as the GPCR-Autoproteolysis INducing (GAIN) domain. EMR1 expression in human is restricted to eosinophils and is a specific marker for these cells. The murine homolog of EMR1, F4/80, is a well-known and widely used marker of murine macrophage populations. The N-terminal fragment (NTF) of EMR1 contains 4-6 Epidermal Growth Factor-like (EGF-like) domains in human and 4-7 EGF-like domains in the mouse. Utilizing F4/80 knockout mice, Lin et al. showed that F4/80 is not necessary for the development of tissue macrophages but is required for the induction of efferent CD8+ regulatory T cells needed for peripheral tolerance.
背景文献
1. Shin AE et al. F4/80(+)Ly6C(high) Macrophages Lead to Cell Plasticity and Cancer Initiation in Colitis. Gastroenterology. 2023 Apr
2. Deng R et al. Periosteal CD68(+) F4/80(+) Macrophages Are Mechanosensitive for Cortical Bone Formation by Secretion and Activation of TGF-beta1. Adv Sci (Weinh). 2022 Jan
Western blot analysis of F4/80 on different lysates with Guinea pig anti-F4/80 antibody (HA601567) at 1/2,000 dilution.
Lane 1: L-929 cell lysate (negative) Lane 2: Mouse spleen tissue lysate (no heat)
Notice: no heat means the lysate is not boiled.
Lysates/proteins at 15 µg/Lane.
Predicted band size: 102 kDa Observed band size: 150 kDa
Exposure time: 42 seconds; ECL: K1801;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA601567) at 1/2,000 dilution was used in primary antibody dilution (K1803) at 4℃ overnight. Rabbit anti-Guinea pig IgG H&L - HRP Secondary Antibody (HA1021) at 1/50,000 dilution was used for 1 hour at room temperature.
Application: IHC-Fr
Species: Mouse
Site: liver
Sample: Frozen section
Antibody concentration: 1/200
Antigen retrieval: Not required
Application: IHC-Fr
Species: Mouse
Site: spleen
Sample: Frozen section
Antibody concentration: 1/200
Antigen retrieval: Not required
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