Search results
Results from the WOW.Com Content Network
Histology of an eosinophil within epithelium, characterized by its bilobed nucleus despite scant visible eosinophilic cytoplasm. Following activation, eosinophils effector functions include production of the following: Cationic granule proteins and their release by degranulation [14] [15] [16]
The most widely understood function of eosinophils is in association with allergy and parasitic disease processes, though their functions in other pathologies are the subject of ongoing research. [3] The opposite phenomenon, in which the number of eosinophils present in the blood is higher than normal, is known as eosinophilia .
Eosinophils are one form of terminally differentiated granulocytes; they function to neutralize invading microbes, primarily parasites and helminthes but also certain types of fungi and viruses. They also participate in transplant rejection, Graft-versus-host disease, and the killing of tumor cells.
The innate leukocytes include: natural killer cells, mast cells, eosinophils, basophils; and the phagocytic cells include macrophages, neutrophils, and dendritic cells, and function within the immune system by identifying and eliminating pathogens that might cause infection. [2]
These eosinophils are strong, pro-inflammatory effector cells. The cells involved in allergic responses, such as eosinophils, are predominantly expressed through eotaxin and the CCR-3 receptor. [ 2 ] The binding of eotaxin and the other related chemokines to the CCR-3 receptor is seen to play a major role in eosinophil recruitment in allergic ...
Eosinophils compose about 2–4% of white blood cells in circulating blood. This count fluctuates throughout the day, seasonally, and during menstruation . It rises in response to allergies, parasitic infections, collagen diseases, and disease of the spleen and central nervous system.
PRG2 is a 117-residue protein that predominates in eosinophil granules. It is a potent enzyme against helminths and is toxic towards bacteria and mammalian cells in vitro. The eosinophil major basic protein also causes the release of histamine from mast cells and basophils, and activates neutrophils and alveolar macrophages.
Eosinophils play a central role in defending the body against infection by parasites. Many diseases, such as asthma and eczema, are caused when eosinophils overreact to environmental triggers and release an excess of chemicals, e.g., cytokines and histamine. The common characteristic among different causes of eosinophilic pneumonia is ...