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Microglia are a type of glial cell located throughout the brain and spinal cord of the central nervous system (CNS). [1] Microglia account for about 10–15% of cells found within the brain. [2] As the resident macrophage cells, they act as the first and main form of active immune defense in the CNS. [3]
He managed to identify microglia between 1919 and 1921 by staining the cells with silver carbonate. [3] His method of staining also led to the discovery of oligodendroglia in 1921, [4] which both he and Penfield are now credited with. [2] However it was Rio Hortega who named the cells. [1]
Microglia have been implicated in neuropathic pain. They become activated in response to nerve injury, as demonstrated by several animal models. [30] Activated microglia release substances that excite pain-sensitive neurons, including prostaglandins and reactive oxygen species, through the purinergic signaling mechanisms.
In 1898, Emil Redlich reported plaques in three patients, two of whom had clinically verified dementia. [10] Redlich used the term 'miliary sclerosis' to describe plaques because he thought they resembled millet seeds, and he was the first to refer to the lesions as 'plaques'. [4]
ICD-10 is the 10th revision of the International Classification of Diseases (ICD), a medical classification list by the World Health Organization (WHO). It contains codes for diseases, signs and symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or diseases. [1]
IBA1 is a 17-kDa EF hand protein that is specifically expressed in macrophages / microglia and is upregulated during the activation of these cells. Iba1 expression is up-regulated in microglia following nerve injury, [8] central nervous system ischemia, and several other brain diseases.
In the gut, however, a mass staining positive for CD117 is likely to be a GIST, arising from ICC cells. The c-KIT molecule comprises a long extracellular domain, a transmembrane segment, and an intracellular part. Mutations generally occur in the DNA encoding the intracellular part (exon 11), which acts as a tyrosine kinase to activate other ...
CAA is associated with brain hemorrhages, particularly microhemorrhages.The accumulation of amyloid beta peptide deposits in the blood vessel walls results in damage of the blood vessels and hindrance of normal blood flow, making blood vessels more prone to bleeding [10] Since CAA can be caused by the same amyloid protein that is associated with Alzheimer's dementia, brain bleeds [11] are more ...