Microglia are a type of neuroglia (glial cell) located throughout the brain and spinal cord. Microglia account for 10–15% of all cells found within the brain. As the resident macrophage cells, they act as the first and main form of active immune defense in the central nervous system (CNS). Microglia (and other neuroglia including astrocytes) are distributed in large non-overlapping regions throughout the CNS. Microglia are key cells in overall brain maintenance—they are constantly scavenging the CNS for plaques, damaged or unnecessary neurons and synapses, and infectious agents. Since these processes must be efficient to prevent potentially fatal damage, microglia are extremely sensitive to even small pathological changes in the CNS. This sensitivity is achieved in part by the presence of unique potassium channels that respond to even small changes in extracellular potassium.
The brain and spinal cord, which make up the CNS, are not usually accessed directly by pathogenic factors in the body's circulation due to a series of endothelial cells known as the blood–brain barrier, or BBB. The BBB prevents most infections from reaching the vulnerable nervous tissue. In the case where infectious agents are directly introduced to the brain or cross the blood–brain barrier, microglial cells must react quickly to decrease inflammation and destroy the infectious agents before they damage the sensitive neural tissue. Due to the lack of antibodies from the rest of the body (few antibodies are small enough to cross the blood–brain barrier), microglia must be able to recognize foreign bodies, swallow them, and act as antigen-presenting cells activating T-cells.
|Microglia in rat cerebellar molecular layer in red, stained with antibody to IBA1/AIF1. Bergmann glia processes are shown in green, DNA in blue.|
The Microglia markers are : CD11b Antibody, CD68 Antibody, IBA1 Antibody, F4/80 Antibody, CD40 antibody, CD68 antibody
FC, IHC(P), IHC(F)
FC ,WB, IHC(F), IP
WB, IHC(P), IHC(F), IF, ICC
Hu, Ms, Rt
Hu, Ms, Rt
WB, IHC(P), IF
Hu, Ms, Rt