title: [Peoniflorin activates Nrf2/ARE pathway to alleviate the Abeta(1-42)-induced hippocampal neuron injury in rats].
abstract: This study was to investigate the effect of peoniflorin on the expressions of nuclear factor erythroid 2-related factor 2 (Nrf2) and its downstream signal molecules in the hippocampus of Alzheimer's disease (AD) rats for exploring the mechanism of peoniflorin protecting hippocampal neurons. AD model rats were established by bilateral intrahippocampal injection of beta-amyloid(1-42) (Abeta(1-42)) and divided randomly into 3 groups: AD model group, peoniflorin low-dose (15 mg x kg(-1)) group and peoniflorin high-dose (30 mg x kg(-1)) group. The vehicle control rats were given bilateral intrahippocampal injection of solvent with the same volume. After peoniflorin or saline was administered (ip) once daily for 14 days, the hippocampuses of all animals were taken out for measuring the expressions of Nrf2, heme oxygenase-1 (HO-1) and gamma-glutamylcysteine synthethase (gamma-GCS) mRNA by reverse transcription PCR, determining the contents of glutathione (GSH), malondialdehyde (MDA) and carbonyl protein (CP) using colorimetric method, and for assaying the expressions of neuronal apoptosis inhibitory protein (NAIP) and Caspase-3 by immunohistochemical staining method. The results showed that peoniflorin markedly increased the expressions of Nrf2, HO-1 and gamma-GCS mRNA, enhanced the level of GSH and decreased the contents of MDA and CP in the hippocampus, as compared with the model group. Peoniflorin also improved the NAIP expression and reduced the Caspase-3 expression in the hippocampus neurons. In conclusion, peoniflorin protects against the Abeta(1-42)-mediated oxidative stress and hippocampal neuron injury in AD rats by activating the Nrf2/ARE pathway.
authors.affiliation: Department of Histology and Embryology, Wannan Medical College, Wuhu 241002, China.
authors.forename: Shu-Zhi
authors.initials: SZ
authors.lastname: Zhong
authors.forename: Shi-Ping
authors.initials: SP
authors.lastname: ma
authors.forename: Zong-Yuan
authors.initials: ZY
authors.lastname: Hong
mesh_terms: D000544:Alzheimer Disease / Q000139:chemically induced / Q000378:metabolism* / Q000503:physiopathology; D016229:Amyloid beta-Peptides; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology; D053148:Caspase 3 / Q000378:metabolism; D005960:Glucosides / Q000494:pharmacology*; D005721:Glutamate-Cysteine Ligase / Q000235:genetics / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D006419:Heme Oxygenase (Decyclizing) / Q000235:genetics / Q000378:metabolism; D006624:Hippocampus / Q000378:metabolism*; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D039821:Monoterpenes / Q000494:pharmacology*; D051267:NF-E2-Related Factor 2 / Q000235:genetics / Q000378:metabolism; D051616:Neuronal Apoptosis-Inhibitory Protein / Q000378:metabolism; D009474:Neurons / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects*; D010446:Peptide Fragments; D012333:RNA, Messenger / Q000378:metabolism; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D006027:Glycosides
chemical_list: D016229:Amyloid beta-Peptides; D000894:Anti-Inflammatory Agents, Non-Steroidal; D053148:Caspase 3; D005960:Glucosides; D005721:Glutamate-Cysteine Ligase; D005978:Glutathione; D006419:Heme Oxygenase (Decyclizing); D008315:Malondialdehyde; D039821:Monoterpenes; D051267:NF-E2-Related Factor 2; D051616:Neuronal Apoptosis-Inhibitory Protein; D010446:Peptide Fragments; D012333:RNA, Messenger; C496803:Naip6 protein, rat; C495637:Nfe2l2 protein, rat; C075222:amyloid beta-protein (1-42); C015423:peoniflorin; D006027:Glycosides; C491523:Hmox1 protein, rat; C505410:Casp3 protein, rat