PMID- 23490331 OWN - NLM STAT- MEDLINE DCOM- 20131113 LR - 20211021 IS - 1755-5949 (Electronic) IS - 1755-5930 (Print) IS - 1755-5930 (Linking) VI - 19 IP - 5 DP - 2013 May TI - The disturbance of hippocampal CaMKII/PKA/PKC phosphorylation in early experimental diabetes mellitus. PG - 329-36 LID - 10.1111/cns.12084 [doi] AB - BACKGROUND: Defining the impact of diabetes and related risk factors on brain cognitive function is critically important for patients with diabetes. AIMS: To investigate the alterations in hippocampal serine/threonine kinases signaling in the early phase of type 1 and type 2 diabetic rats. METHODS: Early experimental diabetes mellitus was induced in rats with streptozotocin or streptozotocin/high fat. Changes in the phosphorylation of proteins were determined by immunoblotting and immunohistochemistry. RESULTS: Our data showed a pronounced decrease in the phosphorylation of Ca(2+) /calmodulin-dependent protein kinase II (CaMKII) in the hippocampi of both type 1 and type 2 diabetic rats compared with age-matched control rats. Unexpectedly, we found a significant increase in the phosphorylation of synapsin I (Ser 603) and GluR1 (Ser 831) in the same experiment. In addition, aberrant changes in hippocampal protein kinase C (PKC) and protein kinase A (PKA) signaling in type 1 and type 2 diabetic rats were also found. Moreover, PP1alpha and PP2A protein levels were decreased in the hippocampus of type 1 diabetic rats, but significantly up-regulated in type 2 diabetic rats. CONCLUSIONS: The disturbance of CaMKII/PKA/PKC phosphorylation in the hippocampus is an early change that may be associated with the development and progression of diabetes-related cognitive dysfunction. CI - (c) 2013 Blackwell Publishing Ltd. FAU - Liao, Mei-Hua AU - Liao MH AD - Institute of Pharmacology, Toxicology and Biochemical Pharmaceutics, Zhejiang University, Hangzhou, China. FAU - Xiang, Ying-Chun AU - Xiang YC FAU - Huang, Ji-Yun AU - Huang JY FAU - Tao, Rong-Rong AU - Tao RR FAU - Tian, Yun AU - Tian Y FAU - Ye, Wei-Feng AU - Ye WF FAU - Zhang, Gen-Sheng AU - Zhang GS FAU - Lu, Ying-Mei AU - Lu YM FAU - Ahmed, Muhammad M AU - Ahmed MM FAU - Liu, Zhi-Rong AU - Liu ZR FAU - Fukunaga, Kohji AU - Fukunaga K FAU - Han, Feng AU - Han F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130314 PL - England TA - CNS Neurosci Ther JT - CNS neuroscience & therapeutics JID - 101473265 RN - 0 (Receptors, AMPA) RN - 0 (Synapsins) RN - 5W494URQ81 (Streptozocin) RN - EC 2.7.11.11 (Cyclic AMP-Dependent Protein Kinases) RN - EC 2.7.11.13 (Protein Kinase C) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinase Type 2) RN - EC 3.1.3.16 (Protein Phosphatase 1) RN - EC 3.1.3.16 (Protein Phosphatase 2) RN - TFZ3H25BS1 (glutamate receptor ionotropic, AMPA 1) SB - IM MH - Animals MH - Calcium-Calmodulin-Dependent Protein Kinase Type 2/*metabolism MH - Cyclic AMP-Dependent Protein Kinases/*metabolism MH - Diabetes Mellitus, Experimental/*metabolism MH - Hippocampus/*metabolism MH - Male MH - Phosphorylation MH - Protein Kinase C/*metabolism MH - Protein Phosphatase 1/analysis MH - Protein Phosphatase 2/analysis MH - Rats MH - Rats, Sprague-Dawley MH - Receptors, AMPA/metabolism MH - Streptozocin MH - Synapsins/metabolism PMC - PMC6493428 COIS- The authors declare no conflict of interest. EDAT- 2013/03/16 06:00 MHDA- 2013/11/14 06:00 PMCR- 2013/03/14 CRDT- 2013/03/16 06:00 PHST- 2012/10/10 00:00 [received] PHST- 2013/02/01 00:00 [revised] PHST- 2013/02/02 00:00 [accepted] PHST- 2013/03/16 06:00 [entrez] PHST- 2013/03/16 06:00 [pubmed] PHST- 2013/11/14 06:00 [medline] PHST- 2013/03/14 00:00 [pmc-release] AID - CNS12084 [pii] AID - 10.1111/cns.12084 [doi] PST - ppublish SO - CNS Neurosci Ther. 2013 May;19(5):329-36. doi: 10.1111/cns.12084. Epub 2013 Mar 14.