| Cat. No. HS-384 117 |
200 µl purified IgG, lyophilized. Albumin and azide were added for stabilization. For reconstitution add 200 µl H2O. Then aliquot and store at -20°C to -80°C until use. Antibodies should be stored at +4°C when still lyophilized. Do not freeze! |
| Applications | |
| Clone | 298G2H5 |
| Subtype | IgG2a (κ light chain) |
| Immunogen | synthetic peptide corresponding to residues surrounding AA 1000 of mouse CD11b (UniProt Id: P05555) |
| Reactivity |
Reacts with: mouse (P05555). No signal: human (P11215), rat (G3V8L7). Other species not tested yet. |
| Remarks |
IHC: Heat-mediated antigen retrieval (in citrate buffer pH 6) is required for immunohistochemical staining. Antibody incubation over-night at room temperature is recommended. |
| Data sheet | hs-384_117.pdf |
Increased CD11b expression represents microglial activation in virus infected mouse brain.
CD11b also called integrin alpha-M (ITGAM) is one protein subunit that forms together with CD18 the heterodimeric integrin αMβ2 complex, also known as macrophage-1 antigen (Mac-1) or complement receptor 3 (CR3) (1). αMβ2 is expressed on polymorphonuclear neutrophils (PMN), monocytes, macrophages, some subsets of cytotoxic T lymphocytes, and NK cells. Antibodies against CD11b are frequently used to identify macrophages and microglia, however not all tissue-resident macrophages are CD11b positive. In the murine liver CD11b expression is rare and almost exclusively found on F4/80 negative cells (2). In the murine spleen CD11b+ cells are less numerous than F4/80+ cells, co-expression of CD11b and F4/80 is also rare and CD11b+ cells tend to be closer to the marginal zone (2). CD11b upregulation on residential alveolar macrophages is a marker of acute and chronic lung inflammation in mice (3). Also, in the brain CD11b is markedly increased during microglial activation (4).