As a result, this causes peripheral nerve endings to report painful stimuli. Immunity
As mentioned previously, PGE2 contributes to the inflammation when bound to EP2 receptors. In terms of immunity, prostaglandins have the ability to regulate lymphocyte function. PGE2 affect T-lymphocyte formation by regulating apoptosis of immature thymocytes. In addition, it can suppress an immune response by inhibiting B lymphocytes from forming into antibody-secreting plasma cells. When this process is suppressed, it causes a decrease in a humoral antibody response because of the decrease in production of antibodies. PGE2 also has roles in inhibition of cytotoxic T-cell function, cell division of T-lymphocytes, and the development of TH1 lymphocytes. Neurological effects
In response to physiologic and psychologic stress, prostaglandin E2 is involved in several inflammation and immunity pathways. As one of the most abundant prostaglandins in the body, Prostaglandin E2 is involved almost all typical inflammation markers such as redness, swelling, and pain. It regulates these responses through binding to G coupled protein prostaglandin E2 (PGE2) receptors (EP1, EP2, EP3, and EP4). The activation of these different EP receptors is dependent on the type of triggering stress stimuli and results in the corresponding stress response. Activation of EP1 via PGE2 results in the suppression of impulse behaviors in response to psychological stress. Prostaglandin E2 is involved in regulating illness induced memory impairment via activation of EP2. Prostaglandin E2 activation of EP3 results in regulation of illness induced fever. EP4 is functionally similar to EP2 and has also been shown in studies to have a role in hypothermia and anorexia.
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