Journal Article

Phosphorylated extracellular signal-regulated kinase 1/2 immunoreactivity and its protein levels in the gerbil hippocampus during normal aging

Kim, S.K., Kangnam Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea, Hwang, I.K., Seoul National University, Seoul, Republic of Korea, Choi, J.H., Hallym University, Chuncheon, Republic of Korea, Won, M.H., Hallym University, Chuncheon, Republic of Korea, Bae, E.J., Hallym University, Chuncheon, Republic of Korea, Lee, C.H., Hallym University, Chuncheon, Republic of Korea, Yoo, K.Y., Hallym University, Chuncheon, Republic of Korea, Park, O.K., Hallym University, Chuncheon, Republic of Korea, Kang, I.J., Hallym University, Chuncheon, Republic of Korea

2010

Overview

Phosphorylated extracellular signal-regulated kinase (pERK) mediates neuronal synaptic plasticity, long-term potentiation, and learning and memory in the hippocampus. In this study, we examined pERK1/2 immunoreactivity and its protein level in the gerbil hippocampus at various ages. In the postnatal month 1 (PM 1) group, very weak pERK1/2 immunoreactivity was detected in the hippocampus. In the CA1 region, pERK1/2 immunoreactivity was considerably increased in the stratum pyramidale in the PM 6 group. Thereafter, pERK1/2 immunoreactivity was decreased. In the CA2/3 region, pERK1/2 immunoreactivity increased in an age-dependent manner until PM 12. Thereafter, numbers of pERK1/2-immunoreactive neurons were decreased. However, in the mossy fiber zone, pERK1/2 immunostaining became stronger with age. In the dentate gyrus, a few pERK1/2-immunoreactive cells were observed until PM 12. In the PM 18 and 24 groups, numbers of pERK1/2-immunoreactive cells were increased, especially in the polymorphic layer. In Western blot analysis, pERK1/2 level in the gerbil hippocampus was increased with age. These results indicate that total pERK1/2 levels are increased in the hippocampus with age. However pERK1/2 immunoreactivity in subregions of the gerbil hippocampus was changed with different pattern during normal aging.

• Publisher: Korean Society for Molecular and Cellular Biology,한국분자세포생물학회
• Subject: AGING / Biochemistry / Biomedical and Life Sciences / Biomedicine / Biotechnology / Cell Biology / ENVEJECIMIENTO / GERBILLE / GERBILS / GERBO / hippocampus / Life Sciences / mossy fiber zone / phosphorylated extracellular signal-regulated kinases 1/2 / VIEILLISSEMENT / 생물학