3-nitrotyrosine and Cerebellar-Diseases

3-nitrotyrosine has been researched along with Cerebellar-Diseases* in 1 studies

Other Studies

1 other study(ies) available for 3-nitrotyrosine and Cerebellar-Diseases

ArticleYear
Age modulates the nitric oxide system response in the ischemic cerebellum.
    Brain research, 2007, Jul-09, Volume: 1157

    To determine whether age influences the nitric oxide system response to ischemia in the cerebellum, we have analyzed the levels of nitrogen oxides (NOx) and the expression of the different nitric oxide synthase isoforms (NOS) in mature adult (4-5 months old) and aged rats (24-27 months old) subjected to a transient global ischemia/reperfusion (I/R) model. We also analyzed the nitrated proteins and the glial fibrillary acidic protein (GFAP) expression. NOx concentration in adult rats, which more than doubled the values found in the aged rats, decreased after the ischemia and reperfusion. However, in the aged animals, these NOx levels did not significantly change after I/R. Constitutive isoforms were first down-regulated in the ischemic period, in both adult and aged animals. However, after 6 h of reperfusion, these isoforms were up-regulated, but only in aged rats. After I/R, iNOS was up-regulated in adults but down-regulated in the aged rats. Hence, after an episode of transient global ischemia and reperfusion, the aged cerebellum maintains a balanced NO production, silencing the iNOS isoform and inducing a weak expression of nNOS and eNOS; this allows NO physiological functions while avoiding possible undesirable effects such as the nitrative damage or astrocyte activation.

    Topics: Aging; Animals; Astrocytes; Brain Ischemia; Cerebellar Diseases; Cerebellum; Down-Regulation; Glial Fibrillary Acidic Protein; Gliosis; Isoenzymes; Male; Nerve Tissue Proteins; Neurons; Nitric Oxide; Nitric Oxide Synthase; Nitric Oxide Synthase Type I; Nitric Oxide Synthase Type II; Nitric Oxide Synthase Type III; Rats; Reperfusion Injury; Time Factors; Tyrosine; Up-Regulation

2007