| First Author | Chung JI | Year | 2013 |
| Journal | Exp Neurol | Volume | 249 |
| Pages | 95-103 | PubMed ID | 24005111 |
| Mgi Jnum | J:319641 | Mgi Id | MGI:6858876 |
| Doi | 10.1016/j.expneurol.2013.08.014 | Citation | Chung JI, et al. (2013) Seizure susceptibility in immature brain due to lack of COX-2-induced PGF2alpha. Exp Neurol 249:95-103 |
| abstractText | The immature brain is prone to seizure; however, the mechanism underlying this vulnerability has not been clarified. Febrile seizure is common in young children, and the use of non-steroidal anti-inflammatory drugs for febrile seizure is not recommended. In previous studies, we established that prostaglandin (PG) F2alpha, a product of cyclooxygenase (COX), acts as an endogenous anticonvulsant in the adult mouse. Therefore, we assumed that COX-2 activity was involved with seizure susceptibility in early life. In the present study, immature mice (postnatal day 9) were far more prone to kainic acid (KA)-induced seizures than mature mice (after postnatal day 35). Seizure activity began later in immature mice, but was more severe and was unaffected by a potent COX inhibitor, indomethacin; in contrast, indomethacin aggravated seizure activity in mature mice. Immature mouse brains exhibited little basal COX-2 expression and little KA-induced COX-2 induction, while KA-induced COX-2 expression and PGF2alpha release were prominent in mature brains. During brain development, COX expression was increased and glycosylated in an age-dependent manner, which was necessary for COX enzyme activity. Intracisternal PGF2alpha administration also reduced KA-induced seizure activity and mortality. Taken together, low COX activity and the resulting deficiency of PGF2alpha may be an essential cause of increased seizure susceptibility in the immature brain. |
