|
1
|
Pai MS, Wang KC, Yeh KC, Wang SJ. Stabilization of mitochondrial function by chlorogenic acid protects against kainic acid-induced seizures and neuronal cell death in rats. Eur J Pharmacol 2023; 961:176197. [PMID: 38000721 DOI: 10.1016/j.ejphar.2023.176197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 10/21/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023]
Abstract
The current study investigated the effect of chlorogenic acid, a polyphenolic compound found in numerous plant products, on a kainic acid-induced seizure rat model and its potential mechanism. Rats were administered chlorogenic acid (10 and 50 mg/kg) intraperitoneally for 30 min before kainic acid (15 mg/kg) intraperitoneal administration. Pretreatment with chlorogenic acid decreased the seizure score, increased the latency to onset of the first seizure, and decreased the mortality rate. Chlorogenic acid pretreatment also resulted in a significant reduction in glutamate elevation and neuronal death in the hippocampus of kainic acid-treated rats. In addition, electron microscopy revealed that kainic acid-induced changes in hippocampal mitochondrial structure were prevented by chlorogenic acid pretreatment. Additionally, the levels of mitochondrial function-related proteins, including sirtuin 3, Complex I, glutamate dehydrogenase 1 and ATP synthase, were increased, and the level of the mitochondrial damage marker cytochrome C was decreased in the hippocampus of chlorogenic acid/kainic acid rats. Furthermore, the expression of mitochondrial biogenesis-related proteins [AMP-activated protein kinase (AMPK), sirtuin1, and peroxisome proliferator-activated receptor γ-coactivator-1α (PGC-1α)] and mitophagy-related proteins [phosphatase and tensin homolog (PTEN)-induced putative kinase 1 (PINK1), Parkin, and microtubule-associated protein 1 light chain 3 (LC3)] was decreased in the hippocampus of kainic acid-treated rats, which was reversed by chlorogenic acid pretreatment. These observations reveal the marked neuroprotective potential of chlorogenic acid against kainic acid-induced neurotoxicity and seizures through prevention of glutamate increase and preservation of AMPK/sirtuin 1/PGC-1α-mediated mitochondrial biogenesis and PINK1/Parkin-induced mitophagy to maintain adequate mitochondrial homeostasis and function.
Collapse
Affiliation(s)
- Ming-Shang Pai
- Department of Psychiatry, Taoyuan Armed Forces General Hospital, Taoyuan, Taiwan; School of Medicine, Fu Jen Catholic University, No.510, Zhongzheng Rd., Xinzhuang Dist, New Taipei City, 24205, Taiwan
| | - Kaw-Chen Wang
- School of Medicine, Fu Jen Catholic University, No.510, Zhongzheng Rd., Xinzhuang Dist, New Taipei City, 24205, Taiwan; Department of Neurology, Cardinal Tien Hospital, New Taipei, Taiwan
| | - Kun-Chieh Yeh
- School of Medicine, Fu Jen Catholic University, No.510, Zhongzheng Rd., Xinzhuang Dist, New Taipei City, 24205, Taiwan; Department of Surgery, Taoyuan Armed Forces General Hospital, Taoyuan, Taiwan; Department of Surgery, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Su-Jane Wang
- School of Medicine, Fu Jen Catholic University, No.510, Zhongzheng Rd., Xinzhuang Dist, New Taipei City, 24205, Taiwan; Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan City, Taiwan.
| |
Collapse
|
|
2
|
Cansu A, Gurgen SG, Demirhan YN, Ozkan Kart P, Yildirim M, Alver A, Yeni Lmez E, Sönmez FM. Effects of treatment with clinically relevant valproate, carbamazepine, oxcarbazepine, topiramate, lamotrigine and levetiracetam on ovarian folliculogenesis in young rats. Epilepsy Res 2022; 184:106966. [PMID: 35763982 DOI: 10.1016/j.eplepsyres.2022.106966] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 05/25/2022] [Accepted: 06/10/2022] [Indexed: 11/08/2022]
Abstract
AIM To determine the effects of valproate (VPA), carbamazepine (CBZ), oxcarbazepine (OXC), topiramate (TPM), lamotrigine (LTG), and levetiracetam (LEV) on ovarian folliculogenesis in young rats. METHODS Forty-nine female Wistar rats, aged 21-24 days, were divided equally into 7 experimental groups. These were given tap water over 21-24 days (control group), 300 mg/kg of VPA, 150 mg/kg of CBZ, 150 mg/kg of OXC, 100 mg/kg of TPM, 10 mg/kg of LTG, or 50 mg/kg of LEV daily in 2 doses via oral gavage until the end of puberty. At the end of the study, the estrous cycle of each rat was monitored daily, and those rats in pro-estrus or di-estrus were sacrificed and the ovaries removed. Serial sections obtained from the ovaries were stained with hematoxylin and eosin, and the corpora lutea and follicles were enumerated. Apoptotic cells were detected using the TUNEL technique. Various serial sections were immunohistochemically stained with proliferating cell nuclear antigen (PCNA), growth differentiation factor (GDF)-9, caspase-3, caspase-9, transforming growth factor beta 1 (TGF-1), and epidermal growth factor (EGF), and evaluated and photographed under a light microscope. KEY FINDINGS The number of corpora lutea was significantly increased in the VPA, CBZ, OXC, and LTG groups compared to the control group (p < 0.001). The number of TUNEL-positive ovarian follicles was 3.3 ± 1.1 (median, 3), 6.1 ± 0.9 (median, 6), and 5.7 ± 0.8 (median,6) in the control, OXC and LEV groups, respectively (p < 0.001). The number of TUNEL-positive granulosa cells was higher in all the groups treated with antiepileptics, with the exception of the TPM group, compared to the control group (p < 0.001). HSCOREs for immunohistochemical staining using PCNA, GDF-9, TGF-1 and EGF were significantly higher in the control group than in the others (p < 0.001). HSCORE for staining using caspase-3 was significantly higher in the VPA, CBZ, OXC and LEV groups, while the HSCORE was significantly lower in the TPM group than in the control group. HSCORE for staining using caspase-9 was significantly higher in the VPA, CBZ and OXC groups, while it was significantly lower in the TPM group than in the control group (p < 0.001). SIGNIFICANCE Exposure to VPA, CBZ, OXC, TPM, LTG and LEV caused different levels of impaired folliculogenesis in young rats.
Collapse
Affiliation(s)
- Ali Cansu
- Department of Pediatric Neurology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey.
| | - Seren Gulsen Gurgen
- Vocational School of Health Services, Celal Bayar University Faculty of Medicine, Manisa, Turkey
| | - Yeseren Nil Demirhan
- Department of Pediatric Neurology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Pınar Ozkan Kart
- Department of Pediatric Neurology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Mehmet Yildirim
- Department of Physiology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Ahmet Alver
- Department of Medical Biochemistry, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Engin Yeni Lmez
- Department of Histology and Embryology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Fatma Müjgan Sönmez
- Department of Pediatric Neurology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| |
Collapse
|
|
3
|
Gan CL, Zou Y, Chen D, Shui X, Hu L, Li R, Zhang T, Wang J, Mei Y, Wang L, Zhang M, Tian Y, Gu X, Lee TH. Blocking ERK-DAPK1 Axis Attenuates Glutamate Excitotoxicity in Epilepsy. Int J Mol Sci 2022; 23:ijms23126370. [PMID: 35742817 PMCID: PMC9223430 DOI: 10.3390/ijms23126370] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/02/2022] [Accepted: 06/06/2022] [Indexed: 12/01/2022] Open
Abstract
Glutamate excitotoxicity induces neuronal cell death during epileptic seizures. Death-associated protein kinase 1 (DAPK1) expression is highly increased in the brains of epilepsy patients; however, the underlying mechanisms by which DAPK1 influences neuronal injury and its therapeutic effect on glutamate excitotoxicity have not been determined. We assessed multiple electroencephalograms and seizure grades and performed biochemical and cell death analyses with cellular and animal models. We applied small molecules and peptides and knocked out and mutated genes to evaluate the therapeutic efficacy of kainic acid (KA), an analog of glutamate-induced neuronal damage. KA administration increased DAPK1 activity by promoting its phosphorylation by activated extracellular signal-regulated kinase (ERK). DAPK1 activation increased seizure severity and neuronal cell death in mice. Selective ERK antagonist treatment, DAPK1 gene ablation, and uncoupling of DAPK1 and ERK peptides led to potent anti-seizure and anti-apoptotic effects in vitro and in vivo. Moreover, a DAPK1 phosphorylation-deficient mutant alleviated glutamate-induced neuronal apoptosis. These results provide novel insight into the pathogenesis of epilepsy and indicate that targeting DAPK1 may be a potential therapeutic strategy for treating epilepsy.
Collapse
Affiliation(s)
- Chen-Ling Gan
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
- Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Institute of Materia Medica, School of Pharmacy, Fujian Medical University, Fuzhou 350122, China
| | - Yulian Zou
- Immunotherapy Institute, Fujian Medical University, Fuzhou 350122, China;
| | - Dongmei Chen
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Xindong Shui
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Li Hu
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Ruomeng Li
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Tao Zhang
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Junhao Wang
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Yingxue Mei
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Long Wang
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Mi Zhang
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Yuan Tian
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Xi Gu
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
| | - Tae Ho Lee
- Fujian Key Laboratory of Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China; (C.-L.G.); (D.C.); (X.S.); (L.H.); (R.L.); (T.Z.); (J.W.); (Y.M.); (L.W.); (M.Z.); (Y.T.); (X.G.)
- Correspondence: ; Tel.: +86-591-2286-2498; Fax: +86-591-2286-2320
| |
Collapse
|
|
4
|
Hwang Y, Kim HC, Shin EJ. Repeated exposure to microcystin-leucine-arginine potentiates excitotoxicity induced by a low dose of kainate. Toxicology 2021; 460:152887. [PMID: 34352349 DOI: 10.1016/j.tox.2021.152887] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/15/2021] [Accepted: 07/30/2021] [Indexed: 02/08/2023]
Abstract
Microcystin-leucine-arginine (MLCR) is a cyanobacterial toxin, and has been demonstrated to cause neurotoxicity. In addition, MCLR has been identified as an inhibitor of protein phosphatase (PP)1 and PP2A, which are known to regulate the phosphorylation of various molecules related to synaptic excitability. Thus, in the present study, we examined whether MCLR exposure affects seizures induced by a low dose of kainic acid (KA; 0.05 μg, i.c.v.) administration. KA-induced seizure occurrence and seizure score significantly increased after repeated exposure to MCLR (2.5 or 5.0 μg/kg, i.p., once a day for 10 days), but not after acute MCLR exposure (2.5 or 5.0 μg/kg, i.p., 2 h and 30 min prior to KA administration), and hippocampal neuronal loss was consistently facilitated by repeated exposure to MCLR. In addition, repeated MCLR significantly elevated the membrane expression of kainate receptor GluK2 subunits, p-pan-protein kinase C (PKC), and p-extracellular signal-related kinase (ERK) at 1 h after KA. However, KA-induced membrane expression of Ca2+/calmodulin-dependent kinase II (CaMKII) was significantly reduced by repeated MCLR exposure. Consistent with the enhanced seizures and neurodegeneration, MCLR exposure significantly potentiated KA-induced oxidative stress and microglial activation, which was accompanied by increased expression of p-ERK and p-PKCδ in the hippocampus. The combined results suggest that repeated MCLR exposure potentiates KA-induced excitotoxicity in the hippocampus by increasing membrane GluK2 expression and enhancing oxidative stress and neuroinflammation through the modulation of p-CaMKII, p-PKC, and p-ERK.
Collapse
Affiliation(s)
- Yeonggwang Hwang
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Hyoung-Chun Kim
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea.
| | - Eun-Joo Shin
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea.
| |
Collapse
|
|
5
|
Soleimani Meigoni Z, Jabari F, Motaghinejad M, Motevalian M. Protective effects of forced exercise against topiramate-induced cognition impairment and enhancement of its antiepileptic activity: molecular and behavioral evidences. Int J Neurosci 2021; 132:1198-1209. [PMID: 33428483 DOI: 10.1080/00207454.2021.1873979] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Propose/aim of study: Forced exercise can act as a neuroprotective factor and cognitive enhancer. The aim of the current study was to evaluate the effects of forced exercise on topiramate (TPM) induced cognitive impairment and also on TPM anti-seizure activity and neurodegeneration status after seizure.Material and method: Forty adult male rats were divided into four groups receiving normal saline, TPM (100 mg/kg), TPM in combination with forced exercise and forced exercise only respectively for 21 days. MWM test, and PTZ induced seizure were used and some oxidative, inflammatory and apoptotic biomarkers were measured for assessment of experimental animals.Results: Forced exercise in combination with TPM could abolish the TPM induced cognitive impairment and potentiates its anti-seizure activity. Also forced exercise in combination with TPM decreased malondialdehyde (MDA), tumor necrosis factor alpha (TNF-α) and interleukin-1 beta (IL-1β) and Bax protein, while caused increase in superoxide dismutase (SOD), glutathione peroxidase (GPx) and glutathione reductase (GR) activities after PTZ administration.Conclusion: It seems that forced exercise could act as an adjunct therapy with TPM for management of induced cognitive impairment and can also potentiate TPM antiepileptic and neuroprotective effects.
Collapse
Affiliation(s)
- Zahra Soleimani Meigoni
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Jabari
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Majid Motaghinejad
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Manijeh Motevalian
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
|
6
|
The Kainic Acid Models of Temporal Lobe Epilepsy. eNeuro 2021; 8:ENEURO.0337-20.2021. [PMID: 33658312 PMCID: PMC8174050 DOI: 10.1523/eneuro.0337-20.2021] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 01/14/2021] [Accepted: 01/24/2021] [Indexed: 12/14/2022] Open
Abstract
Experimental models of epilepsy are useful to identify potential mechanisms of epileptogenesis, seizure genesis, comorbidities, and treatment efficacy. The kainic acid (KA) model is one of the most commonly used. Several modes of administration of KA exist, each producing different effects in a strain-, species-, gender-, and age-dependent manner. In this review, we discuss the advantages and limitations of the various forms of KA administration (systemic, intrahippocampal, and intranasal), as well as the histologic, electrophysiological, and behavioral outcomes in different strains and species. We attempt a personal perspective and discuss areas where work is needed. The diversity of KA models and their outcomes offers researchers a rich palette of phenotypes, which may be relevant to specific traits found in patients with temporal lobe epilepsy.
Collapse
|
|
7
|
Kim S, Choi BK, Park JA, Kim HJ, Oh TI, Kang WS, Kim JW, Park HJ. Identification of Brain Damage after Seizures Using an MR-Based Electrical Conductivity Imaging Method. Diagnostics (Basel) 2021; 11:diagnostics11030569. [PMID: 33809992 PMCID: PMC8004663 DOI: 10.3390/diagnostics11030569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/13/2021] [Accepted: 03/18/2021] [Indexed: 11/28/2022] Open
Abstract
Previous imaging studies have shown the morphological malformation and the alterations of ionic mobility, water contents, electrical properties, or metabolites in seizure brains. Magnetic resonance electrical properties tomography (MREPT) is a recently developed technique for the measurement of electrical tissue properties with a high frequency that provides cellular information regardless of the cell membrane. In this study, we examined the possibility of MREPT as an applicable technique to detect seizure-induced functional changes in the brain of rats. Ultra-high field (9.4 T) magnetic resonance imaging (MRI) was performed, 2 h, 2 days, and 1 week after the injection of N-methyl-D-aspartate (NMDA; 75 mg/kg). The conductivity images were reconstructed from B1 phase images using a magnetic resonance conductivity imaging (MRCI) toolbox. The high-frequency conductivity was significantly decreased in the hippocampus among various brain regions of NMDA-treated rats. Nissl staining showed shrunken cell bodies and condensed cytoplasm potently at 2 h after NMDA treatment, and neuronal cell loss at all time points in the hippocampus. These results suggest that the reduced electrical conductivity may be associated with seizure-induced neuronal loss in the hippocampus. Magnetic resonance (MR)-based electrical conductivity imaging may be an applicable technique to non-invasively identify brain damage after a seizure.
Collapse
Affiliation(s)
- Sanga Kim
- Department of Pharmacology, School of Medicine, Kyung Hee University, Seoul 02447, Korea;
| | - Bup Kyung Choi
- Department of Biomedical Engineering, School of Medicine, Kyung Hee University, Seoul 02447, Korea; (B.K.C.); (H.J.K.)
| | - Ji Ae Park
- Division of Applied RI, Korea Institute of Radiological & Medical Science, Seoul 01812, Korea;
| | - Hyung Joong Kim
- Department of Biomedical Engineering, School of Medicine, Kyung Hee University, Seoul 02447, Korea; (B.K.C.); (H.J.K.)
| | - Tong In Oh
- Department of Biomedical Engineering, School of Medicine, Kyung Hee University, Seoul 02447, Korea; (B.K.C.); (H.J.K.)
- Correspondence: (T.I.O.); (J.W.K.); (H.J.P.)
| | - Won Sub Kang
- Department of Neuropsychiatry, School of Medicine, Kyung Hee University, Seoul 02447, Korea;
| | - Jong Woo Kim
- Department of Neuropsychiatry, School of Medicine, Kyung Hee University, Seoul 02447, Korea;
- Correspondence: (T.I.O.); (J.W.K.); (H.J.P.)
| | - Hae Jeong Park
- Department of Pharmacology, School of Medicine, Kyung Hee University, Seoul 02447, Korea;
- Correspondence: (T.I.O.); (J.W.K.); (H.J.P.)
| |
Collapse
|
|
8
|
Yu S, Jia B, Yang Y, Liu N, Wu A. Involvement of PERK-CHOP pathway in fumonisin B1- induced cytotoxicity in human gastric epithelial cells. Food Chem Toxicol 2020; 136:111080. [DOI: 10.1016/j.fct.2019.111080] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/03/2019] [Accepted: 12/23/2019] [Indexed: 11/25/2022]
|
|
9
|
Chiu KM, Lin TY, Lee MY, Lu CW, Wang MJ, Wang SJ. Dexmedetomidine protects neurons from kainic acid-induced excitotoxicity by activating BDNF signaling. Neurochem Int 2019; 129:104493. [PMID: 31220473 DOI: 10.1016/j.neuint.2019.104493] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 06/14/2019] [Accepted: 06/17/2019] [Indexed: 12/15/2022]
Abstract
Glutamatergic excitotoxicity is crucial in the pathogenesis of epileptic seizures. Dexmedetomidine, a potent and highly selective α2 adrenoceptor agonist, inhibits glutamate release from nerve terminals in rat cerebrocortical nerve terminals. However, the ability of dexmedetomidine to affect glutamate-induced brain injury is still unknown. Therefore, the present study evaluated the protective effect of dexmedetomidine against brain damage by using a kainic acid (KA) rat model, a frequently used model for temporal lobe epilepsy. Rats were treated with dexmedetomidine (1 or 5 μg/kg, intraperitoneally) 30 min before the KA (15 mg/kg) intraperitoneal injection. KA-induced seizure score and elevations of glutamate release in rat hippocampi were inhibited by pretreatment with dexmedetomidine. Histopathological and TUNEL staining analyzes showed that dexmedetomidine attenuated KA-induced neuronal death in the hippocampus. Dexmedetomidine ameliorated KA-induced apoptosis, and this neuroprotective effect was accompanied by inhibited the KA-induced caspase-3 expression as well as MAPKs phosphorylation, and reversed Bcl-2 down-expression, coupled with increased Nrf2, BDNF and TrkB expression in KA-treated rats. The results suggest that dexmedetomidine protected rat brains from KA-induced excitotoxic damage by reducing glutamate levels, suppressing caspase-3 activation and MAPKs phosphorylation, and enhancing Bcl-2, Nrf2, BDNF and TrkB expression in the hippocampus. Therefore, dexmedetomidine may be beneficial for preventing or treating brain disorders associated with excitotoxic neuronal damage. In conclusion, these data suggest that dexmedetomidine has the therapeutic potential for treating epilepsy.
Collapse
Affiliation(s)
- Kuan-Ming Chiu
- Division of Cardiovascular Surgery, Cardiovascular Center, Far-Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Nursing, Oriental Institute of Technology, New Taipei City, Taiwan; Department of Photonics Engineering, Yuan Ze University, Taoyuan City, Taiwan
| | - Tzu-Yu Lin
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Mechanical Engineering, Yuan Ze University, Taoyuan City, Taiwan
| | - Ming-Yi Lee
- Division of Cardiovascular Surgery, Cardiovascular Center, Far-Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Cheng-Wei Lu
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Mechanical Engineering, Yuan Ze University, Taoyuan City, Taiwan
| | - Ming-Jiuh Wang
- Department of Anesthesiology, National Taiwan University Hospital, Taipei City, Taiwan
| | - Su-Jane Wang
- Graduate Institute of Basic Medicine, Fu Jen Catholic University, New Taipei City, Taiwan; School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan.
| |
Collapse
|
|
10
|
Lu CW, Hsieh HL, Lin TY, Hsieh TY, Huang SK, Wang SJ. Echinacoside, an Active Constituent of Cistanche Herba, Exerts a Neuroprotective Effect in a Kainic Acid Rat Model by Inhibiting Inflammatory Processes and Activating the Akt/GSK3β Pathway. Biol Pharm Bull 2018; 41:1685-1693. [DOI: 10.1248/bpb.b18-00407] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Cheng Wei Lu
- Department of Anesthesiology, Far-Eastern Memorial Hospital
- Department of Mechanical Engineering, Yuan Ze University
| | - Hsi Lung Hsieh
- Department of Nursing, Division of Basic Medical Sciences, Research Center for Chinese Herbal Medicine, and Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology
- Department of Neurology, Chang Gung Memorial Hospital
| | - Tzu Yu Lin
- Department of Anesthesiology, Far-Eastern Memorial Hospital
- Department of Mechanical Engineering, Yuan Ze University
| | - Ting Yang Hsieh
- P.H.D. Program in Neutrition & Food Science, Fu Jen Catholic University
| | - Shu Kuei Huang
- Department of Anesthesiology, Far-Eastern Memorial Hospital
| | - Su Jane Wang
- School of Medicine, Fu Jen Catholic University
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology
| |
Collapse
|
|
11
|
Tualang Honey Reduced Neuroinflammation and Caspase-3 Activity in Rat Brain after Kainic Acid-Induced Status Epilepticus. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:7287820. [PMID: 30108663 PMCID: PMC6077521 DOI: 10.1155/2018/7287820] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 05/26/2018] [Indexed: 01/25/2023]
Abstract
The protective effect of tualang honey (TH) on neuroinflammation and caspase-3 activity in rat cerebral cortex, cerebellum, and brainstem after kainic acid- (KA-) induced status epilepticus was investigated. Male Sprague-Dawley rats were pretreated orally with TH (1.0 g/kg body weight) five times at 12 h intervals. KA (15 mg/kg body weight) was injected subcutaneously 30 min after last oral treatment. Rats were sacrificed at 2 h, 24 h, and 48 h after KA administration. Neuroinflammation markers and caspase-3 activity were analyzed in different brain regions 2 h, 24 h, and 48 h after KA administration. Administration of KA induced epileptic seizures. KA caused significant (p < 0.05) increase in the level of tumor necrosis factor alpha (TNF-α), interleukin 1 beta (IL-1β), glial fibrillary acidic protein (GFAP), allograft inflammatory factor 1 (AIF-1), and cyclooxygenase-2 (COX-2) and increase in the caspase-3 activity in the rat cerebral cortex, cerebellum, and brainstem at multiple time points. Pretreatment with TH significantly (p < 0.05) reduced the elevation of TNF-α, IL-1β, GFAP, AIF-1, and COX-2 level in those brain regions at multiple time points and attenuated the increased caspase-3 activity in the cerebral cortex. In conclusion, TH reduced neuroinflammation and caspase-3 activity after kainic acid- (KA-) induced status epilepticus.
Collapse
|
|
12
|
Effect of Rufinamide on the kainic acid-induced excitotoxic neuronal death in the mouse hippocampus. Arch Pharm Res 2018; 41:776-783. [DOI: 10.1007/s12272-018-1043-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 05/25/2018] [Indexed: 01/11/2023]
|
|
13
|
Zhao Z, Liu GC, Fu W. Role of PERK-eIF2α signaling pathway in fetal male rats with hypospadias induced by di-n-butyl phthalate. Kaohsiung J Med Sci 2018; 34:487-493. [PMID: 30173778 DOI: 10.1016/j.kjms.2018.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 01/31/2018] [Accepted: 04/11/2018] [Indexed: 12/11/2022] Open
Abstract
This study aims to explore the role of PERK-eIF2α signaling pathway in fetal male rats with hypospadias induced by maternal exposure to di-n-butyl phthalate (DBP). DBP was used to treat pregnant SD rats by gastric intubation from gestation day (GD) 14-18 to construct a hypospadias rat model. The amount, weight, anogenital distance (AGD), and hypospadias incidence of rats were recorded and the genital tubercle (GT) of fetal male rats was collected on GD 19. Western blotting was performed to detect the expressions of PERK-eIF2α pathway- and autophagy-related proteins, and cell apoptosis was detected using TUNEL method. Then, GT fibroblasts of fetal rats were obtained and transfected with PERK-siRNA to detect cell apoptosis and autophagy in each transfected group. The incidence of hypospadias was 43.49% in fetal male rats induced by DBP. The fetal rats in DBP group presented the decreased birth weight and anogenital distance (AGD)/body weight ratio than the Control group (all P < 0.05). Further, p-PERK, p-eIF2α and ATF4 protein expressions and the ratio of LC3-II/LC3-I were greatly increased in the GTs of fetal rats, while apoptosis index (AI) and P62 protein expression were evidently decreased (all P < 0.05). In addition, the apoptosis rate was increased in GT fibroblasts after transfection of PERK-siRNA with the increased P62 and reduced LC3-II/LC3-I ratio (all P < 0.05). Activation of PERK-eIF2α signaling pathway can influence the GT development of fetal male rats with hypospadias induced by DBP through activation of autophagy and inhibition of apoptosis.
Collapse
Affiliation(s)
- Zhang Zhao
- Department of Urology, Guangzhou Women and Children's Medical Center, Guangzhou, China.
| | - Guo-Chang Liu
- Department of Urology, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Wen Fu
- Department of Urology, Guangzhou Women and Children's Medical Center, Guangzhou, China
| |
Collapse
|
|
14
|
Shellhaas RA, Berg AT, Grinspan ZM, Wusthoff CJ, Millichap JJ, Loddenkemper T, Coryell J, Saneto RP, Chu CJ, Joshi SM, Sullivan JE, Knupp KG, Kossoff EH, Keator C, Wirrell EC, Mytinger JR, Valencia I, Massey S, Gaillard WD. Initial Treatment for Nonsyndromic Early-Life Epilepsy: An Unexpected Consensus. Pediatr Neurol 2017; 75:73-79. [PMID: 28807611 PMCID: PMC5863237 DOI: 10.1016/j.pediatrneurol.2017.06.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 06/22/2017] [Accepted: 06/22/2017] [Indexed: 12/22/2022]
Abstract
OBJECTIVE There are no evidence-based guidelines on the preferred approach to treating early-life epilepsy. We examined initial therapy selection in a contemporary US cohort of children with newly diagnosed, nonsyndromic, early-life epilepsy (onset before age three years). METHODS Seventeen pediatric epilepsy centers participated in a prospective cohort study of children with newly diagnosed epilepsy with onset under 36 months of age. Details regarding demographics, seizure types, and initial medication selections were obtained from medical records. RESULTS About half of the 495 enrolled children with new-onset, nonsyndromic epilepsy were less than 12 months old at the time of diagnosis (n = 263, 53%) and about half (n = 260, 52%) had epilepsy with focal features. Of 464 who were treated with monotherapy, 95% received one of five drugs: levetiracetam (n = 291, 63%), oxcarbazepine (n = 67, 14%), phenobarbital (n = 57, 12%), topiramate (n = 16, 3.4%), and zonisamide (n = 13, 2.8%). Phenobarbital was prescribed first for 50 of 163 (31%) infants less than six months old versus seven of 300 (2.3%) of children six months or older (P < 0.0001). Although the first treatment varied across study centers (P < 0.0001), levetiracetam was the most commonly prescribed medication regardless of epilepsy presentation (focal, generalized, mixed/uncertain). Between the first and second treatment choices, 367 (74%) of children received levetiracetam within the first year after diagnosis. CONCLUSIONS Without any specific effort, the pediatric epilepsy community has developed an unexpectedly consistent approach to initial treatment selection for early-life epilepsy. This suggests that a standard practice is emerging and could be utilized as a widely acceptable basis of comparison in future drug studies.
Collapse
Affiliation(s)
- Renée A. Shellhaas
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan,Communications should be addressed to: Dr. Shellhaas; C.S. Mott Children’s Hospital, room 12-733, 1540 E. Hospital Dr., Ann Arbor, MI 48109-4279.
| | - Anne T. Berg
- Epilepsy Center, Lurie Children’s Hospital; Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Zachary M. Grinspan
- Weill Cornell Medicine; New York Presbyterian Hospital; Health Information Technology Evaluation Collaborative, New York, New York
| | | | - John J. Millichap
- Epilepsy Center, Lurie Children’s Hospital; Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Tobias Loddenkemper
- Division of Epilepsy and Clinical Neurophysiology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Jason Coryell
- Departments of Pediatrics & Neurology, Oregon Health & Sciences University, Portland, Oregon
| | - Russell P. Saneto
- Division of Pediatric Neurology, Seattle Children’s Hospital, University of Washington, Seattle, Washington
| | - Catherine J. Chu
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts
| | - Sucheta M. Joshi
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Joseph E. Sullivan
- Department of Neurology, University of California San Francisco, San Francisco, California
| | - Kelly G. Knupp
- Department of Pediatrics and Neurology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Eric H. Kossoff
- Departments of Neurology and Pediatrics, Johns Hopkins Hospital, Baltimore, Maryland
| | - Cynthia Keator
- Cook Children’s Health Care System, Jane and John Justin Neurosciences Center, Fort Worth, Texas
| | | | - John R. Mytinger
- Department of Pediatrics, the Ohio State University; Nationwide Children’s Hospital, Columbus, Ohio
| | - Ignacio Valencia
- Section of Neurology, St. Christopher’s Hospital for Children, Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Shavonne Massey
- Departments of Neurology and Pediatrics, The Children’s Hospital of Philadelphia and The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - William D. Gaillard
- Department of Neurology, Children’s National Health System, George Washington University School of Medicine, Washington, District of Columbia
| |
Collapse
|
|
15
|
Motaghinejad M, Motevalian M, Abdollahi M, Heidari M, Madjd Z. Topiramate Confers Neuroprotection Against Methylphenidate-Induced Neurodegeneration in Dentate Gyrus and CA1 Regions of Hippocampus via CREB/BDNF Pathway in Rats. Neurotox Res 2017; 31:373-399. [PMID: 28078543 DOI: 10.1007/s12640-016-9695-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 12/21/2016] [Accepted: 12/26/2016] [Indexed: 12/18/2022]
Abstract
Methylphenidate (MPH) abuse can cause serious neurological damages. The neuroprotective effects of topiramate (TPM) have been reported already, but its mechanism of action still remains unclear. The current study evaluates in vivo role of CREB/BDNF in TPM protection of the rat hippocampal cells from methylphenidate-induced apoptosis, oxidative stress, and inflammation. A total of 60 adult male rats were divided into six groups. Groups 1 and 2 received normal saline (0.7 ml/rat) and MPH (10 mg/kg) respectively for 14 days. Groups 3 and 4 were concurrently treated with MPH (10 mg/kg) and TPM 50 and 100 mg/kg respectively for 14 days. Groups 5 and 6 were treated with 50 and 100 mg/kg TPM only respectively. After drug administration, open field test (OFT) was used to investigate motor activity. The hippocampus was then isolated and the apoptotic, antiapoptotic, oxidative, antioxidant, and inflammatory factors were measured. Expression of the total and phosphorylated CREB and BDNF in gene and protein levels, and gene expression of Ak1, CaMK4, MAPK3, PKA, and c-Fos levels were also measured. MPH significantly decreased motor activity in OFT. TPM (50 and 100 mg/kg) decreased MPH-induced motor activity disturbance. Additionally, MPH significantly increased Bax protein level, CaMK4 gene expression, lipid peroxidation, catalase activity, mitochondrial GSH, IL-1β, and TNF-α levels in isolated hippocampal cells. Also CREB, in total and phosphorylated forms, BDNF and Bcl-2 protein levels, Ak1, MAPK3, PKA and c-Fos gene expression, superoxide dismutase, glutathione peroxidase, and glutathione reductase activities decreased significantly by MPH. TPM (50 and 100 mg/kg), both in the presence and absence of MPH, attenuated the effects of MPH. Immunohistochemistry data showed that TPM increased localization of the total and phosphorylated forms of CREB in dentate gyrus (DG) and CA1 areas of the hippocampus. It seems that TPM can be used as a neuroprotective agent against apoptosis, oxidative stress, and neuroinflammation induced by frequent use of MPH. This might be probably mediated by the CREB/BDNF and their upstream signaling pathways.
Collapse
Affiliation(s)
- Majid Motaghinejad
- Razi Drug Research Center & Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Hemmat high way, Beside Milad Tower, Tehran, 14496-14525, Iran
| | - Manijeh Motevalian
- Razi Drug Research Center & Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Hemmat high way, Beside Milad Tower, Tehran, 14496-14525, Iran.
| | - Mohammad Abdollahi
- Department of Toxicology and Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mansour Heidari
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Madjd
- Oncopathology Research Center and Department of pathology, Faculty of medicine, Iran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
|
16
|
Meng DW, Liu HG, Yang AC, Zhang K, Zhang JG. Stimulation of Anterior Thalamic Nuclei Protects Against Seizures and Neuronal Apoptosis in Hippocampal CA3 Region of Kainic Acid-induced Epileptic Rats. Chin Med J (Engl) 2017; 129:960-6. [PMID: 27064042 PMCID: PMC4831532 DOI: 10.4103/0366-6999.179799] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background: The antiepileptic effect of the anterior thalamic nuclei (ANT) stimulation has been demonstrated; however, its underlying mechanism remains unclear. The aim of this study was to investigate the effect of chronic ANT stimulation on hippocampal neuron loss and apoptosis. Methods: Sixty-four rats were divided into four groups: The control group, the kainic acid (KA) group, the sham-deep brain stimulation (DBS) group, and the DBS group. KA was used to induce epilepsy. Seizure count and latency to the first spontaneous seizures were calculated. Nissl staining was used to analyze hippocampal neuronal loss. Polymerase chain reaction and Western blotting were conducted to assess the expression of caspase-3 (Casp3), B-cell lymphoma-2 (Bcl2), and Bcl2-associated X protein (Bax) in the hippocampal CA3 region. One-way analysis of variance was used to determine the differences between the four groups. Results: The latency to the first spontaneous seizures in the DBS group was significantly longer than that in the KA group (27.50 ± 8.05 vs. 16.38 ± 7.25 days, P = 0.0005). The total seizure number in the DBS group was also significantly reduced (DBS vs. KA group: 11.75 ± 6.80 vs. 23.25 ± 7.72, P = 0.0002). Chronic ANT-DBS reduced neuronal loss in the hippocampal CA3 region (DBS vs. KA group: 23.58 ± 6.34 vs. 13.13 ± 4.00, P = 0.0012). After chronic DBS, the relative mRNA expression level of Casp3 was decreased (DBS vs. KA group: 1.18 ± 0.37 vs. 2.09 ± 0.46, P = 0.0003), and the relative mRNA expression level of Bcl2 was increased (DBS vs. KA group: 0.92 ± 0.21 vs. 0.48 ± 0.16, P = 0.0004). The protein expression levels of CASP3 (DBS vs. KA group: 1.25 ± 0.26 vs. 2.49 ± 0.38, P < 0.0001) and BAX (DBS vs. KA group: 1.57 ± 0.49 vs. 2.80 ± 0.63, P = 0.0012) both declined in the DBS group whereas the protein expression level of BCL2 (DBS vs. KA group: 0.78 ± 0.32 vs. 0.36 ± 0.17, P = 0.0086) increased in the DBS group. Conclusions: This study demonstrated that chronic ANT stimulation could exert a neuroprotective effect on hippocampal neurons. This neuroprotective effect is likely to be mediated by the inhibition of apoptosis in the epileptic hippocampus.
Collapse
Affiliation(s)
| | | | | | | | - Jian-Guo Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050; Beijing Key Laboratory of Neuromodulation, Beijing 100050; Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, Beijing 100050, China
| |
Collapse
|
|
17
|
Mohd Sairazi NS, K.N.S. S, Asari MA, Mummedy S, Muzaimi M, Sulaiman SA. Effect of tualang honey against KA-induced oxidative stress and neurodegeneration in the cortex of rats. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 17:31. [PMID: 28068984 PMCID: PMC5223557 DOI: 10.1186/s12906-016-1534-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Accepted: 12/19/2016] [Indexed: 11/24/2022]
Abstract
BACKGROUND Administration of KA on rodents has resulted in seizures, behavioral changes, oxidative stress, and neuronal degeneration on selective population of neurons in the brain. The present study was undertaken to investigate the extent of neuroprotective effect conferred by Malaysian Tualang Honey (TH), an antioxidant agent, in the cerebral cortex of rats against KA-induced oxidative stress and neurodegeneration in an animal model of KA-induced excitotoxicity. METHODS Male Sprague-Dawley rats were randomly divided into five groups: Control, KA-treated group, TH + KA-treated group, aspirin (ASP; anti-inflammatory agent) + KA-treated group and topiramate (TPM; antiepileptic agent) + KA-treated group. The animals were pretreated orally with drinking water, TH (1.0g/kg BW), ASP (7.5mg/kg BW) or TPM (40mg/kg BW), respectively, five times at 12 h intervals. KA (15mg/kg BW) was injected subcutaneously 30 min after last treatment to all groups except the control group (normal saline). Behavioral change was observed using an open field test (OFT) to assess the locomotor activity of the animals. Animals were sacrificed after 2 h, 24 h and 48 h of KA administration. RESULTS KA significantly inflicted more neuronal degeneration in the piriform cortex and heightened the predilection to seizures as compared with the control animals. Pretreatment with TH reduced the KA-induced neuronal degeneration in the piriform cortex but failed to prevent the occurrence of KA-induced seizures. In the OFT, KA-induced animals showed an increased in locomotor activity and hyperactivity and these were attenuated by TH pretreatment. Furthermore, TH pretreatment significantly attenuated an increase of thiobarbituric acid reactive substances level and a decrease of total antioxidant status level enhanced by KA in the cerebral cortex. CONCLUSION These results suggest that pretreatment with TH has a therapeutic potential against KA-induced oxidative stress and neurodegeneration through its antioxidant effect.
Collapse
Affiliation(s)
- Nur Shafika Mohd Sairazi
- Department of Chemical Pathology, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kota Bharu, Kelantan Malaysia
| | - Sirajudeen K.N.S.
- Department of Chemical Pathology, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kota Bharu, Kelantan Malaysia
| | - Mohd Asnizam Asari
- Department of Anatomy, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kota Bharu, Kelantan Malaysia
| | - Swamy Mummedy
- Department of Chemical Pathology, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kota Bharu, Kelantan Malaysia
| | - Mustapha Muzaimi
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kota Bharu, Kelantan Malaysia
| | - Siti Amrah Sulaiman
- Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kota Bharu, Kelantan Malaysia
| |
Collapse
|
|
18
|
Chang Y, Lu CW, Lin TY, Huang SK, Wang SJ. Baicalein, a Constituent of Scutellaria baicalensis, Reduces Glutamate Release and Protects Neuronal Cell Against Kainic Acid-Induced Excitotoxicity in Rats. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2016; 44:943-62. [DOI: 10.1142/s0192415x1650052x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Interest in the health benefits of flavonoids, particularly their effects on neurodegenerative disease, is increasing. This study evaluated the role of baicalein, a flavonoid compound isolated from the traditional Chinese medicine Scutellaria baicalensis, in glutamate release and glutamate neurotoxicity in the rat hippocampus. In the rat hippocampal nerve terminals (synaptosomes), baicalein inhibits depolarization-induced glutamate release, and this phenomenon is prevented by chelating the extracellular Ca[Formula: see text] ions and blocking presynaptic Cav2.2 (N-type) and Cav2.1 (P/Q-type) channel activity. In slice preparations, whole cell patch-clamp experiments revealed that baicalein reduced the frequency of miniature excitatory postsynaptic currents, without affecting their amplitude. In a kainic acid rat model, intraperitoneally administering baicalein to rats before the kainic acid intraperitoneal injection substantially attenuated kainic acid-induced neuronal cell death, c-Fos expression, and the activation of the mammalian target of rapamycin in the hippocampus. This study is the first to demonstrate that the natural compound baicalein inhibits glutamate release from hippocampal nerve terminals, and executes a protective action against kainic acid-induced excitotoxicity in vivo. The findings enhance the understanding of baicalein’s action in the brain, and suggest that this natural compound is valuable for treating brain disorders related to glutamate excitotoxicity.
Collapse
Affiliation(s)
- Yi Chang
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan
- Department of Anesthesiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei 111, Taiwan
| | - Cheng Wei Lu
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei City 22060, Taiwan
- Department of Mechanical Engineering, Yuan Ze University, Taoyuan 320, Taiwan
| | - Tzu Yu Lin
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei City 22060, Taiwan
- Department of Mechanical Engineering, Yuan Ze University, Taoyuan 320, Taiwan
| | - Shu Kuei Huang
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei City 22060, Taiwan
| | - Su Jane Wang
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan
| |
Collapse
|
|
19
|
Hu QP, Mao DA. Histone deacetylase inhibitor SAHA attenuates post-seizure hippocampal microglia TLR4/MYD88 signaling and inhibits TLR4 gene expression via histone acetylation. BMC Neurosci 2016; 17:22. [PMID: 27193049 PMCID: PMC4872358 DOI: 10.1186/s12868-016-0264-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 05/11/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Epilepsy is a common neurological disorder characterized by recurrent unprovoked seizures. Seizure-induced TLR4/MYD88 signaling plays a critical role in activating microglia and triggering neuron apoptosis. SAHA is a histone deacetylase inhibitor that regulates gene expression by increasing chromatin histone acetylation. In this study, we investigated the role of SAHA in TLR4/MYD88 signaling in a rat seizure model. RESULTS Sprague-Dawley rats with kainic acid (KA)-induced seizures were treated with SAHA. The expression of TLR4, MYD88, NF-κB P65 and IL-1β in hippocampus was detected at hour 2 and 6 and day 1, 2, and 3 post seizure. SAHA pretreatment increased seizure latency and decreased seizure scores. The expression levels of TLR4, MYD88, NF-κB and IL-1β increased significantly in both activated microglia and apoptotic neurons after KA treatment. The effects were attenuated by SAHA. Chromatin immunoprecipitation assays indicated that the H3 histone acetylation levels significantly decreased while H3K9 levels significantly increased in the KA treatment group. The H3 and H3K9 acetylation levels returned to control levels after SAHA (50 mg/kg) pretreatment. There was a positive correlation between the expression of TLR4 and the acetylation levels of H3K9. CONCLUSIONS Histone deacetylase inhibitor SAHA can suppress seizure-induced TLR4/MYD88 signaling and inhibit TLR4 gene expression through histone acetylation regulation. This suggests that SAHA may protect against seizure-induced brain damage.
Collapse
Affiliation(s)
- Qing-Peng Hu
- Department of Pediatrics, The Second Xiang-Ya Hospital, Central South University, 139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Ding-An Mao
- Department of Pediatrics, The Second Xiang-Ya Hospital, Central South University, 139 Middle Renmin Road, Changsha, 410011, Hunan, China.
| |
Collapse
|
|
20
|
Hesperidin inhibits glutamate release and exerts neuroprotection against excitotoxicity induced by kainic acid in the hippocampus of rats. Neurotoxicology 2015; 50:157-69. [PMID: 26342684 DOI: 10.1016/j.neuro.2015.08.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/28/2015] [Accepted: 08/31/2015] [Indexed: 02/05/2023]
Abstract
The citrus flavonoid hesperidin exerts neuroprotective effects and could cross the blood-brain barrier. Given the involvement of glutamate neurotoxicity in the pathogenesis of neurodegenerative disorders, this study was conducted to evaluate the potential role of hesperidin in glutamate release and glutamate neurotoxicity in the hippocampus of rats. In rat hippocampal nerve terminals (synaptosomes), hesperidin inhibited the release of glutamate and elevation of cytosolic free Ca(2+) concentration evoked by 4-aminopyridine (4-AP), but did not alter 4-AP-mediated depolarization. The inhibitory effect of hesperidin on evoked glutamate release was prevented by chelating the extracellular Ca(2+) ions and blocking the activity of Cav2.2 (N-type) and Cav2.1 (P/Q-type) channels or protein kinase C. In hippocampal slice preparations, whole-cell patch clamp experiments showed that hesperidin reduced the frequency of spontaneous excitatory postsynaptic currents without affecting their amplitude, indicating the involvement of a presynaptic mechanism. In addition, intraperitoneal (i.p.) injection of kainic acid (KA, 15 mg/kg) elevated the extracellular glutamate levels and caused considerable neuronal loss in the hippocampal CA3 area. These KA-induced alterations were attenuated by pretreatment with hesperidin (10 or 50 mg/kg, i.p.) before administering the KA. These results demonstrate that hesperidin inhibits evoked glutamate release in vitro and attenuates in vivo KA-induced neuronal death in the hippocampus. Our findings indicate that hesperidin may be a promising candidate for preventing or treating glutamate excitotoxicity related brain disorders such as neurodegenerative diseases.
Collapse
|
|
21
|
Dhir A, Chavda V. Pre- and post-exposure talampanel (GYKI 53773) against kainic acid seizures in neonatal rats. Pharmacol Rep 2015; 68:190-5. [PMID: 26721372 DOI: 10.1016/j.pharep.2015.08.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/11/2015] [Accepted: 08/19/2015] [Indexed: 12/23/2022]
Abstract
BACKGROUND AMPA receptors play an important role in the neurobiology of neonatal epilepsy. The present study evaluated the effect of talampanel, a potent and selective non-competitive antagonist of AMPA receptors, against kainic acid-induced continuous seizures (status epilepticus) and other behavioral abnormalities in neonatal rats. METHODS Kainic acid was administered at doses of 2 or 4mg/kg, ip to induce seizures and status epilepticus in postnatal 7 days old rat neonates in pre- and post-exposure studies, respectively. RESULTS Intraperitoneal administration of kainic acid (2 or 4mg/kg) resulted in forelimb/hind-limb scratching defined as automatism, continuous generalized tonic-clonic seizures with loss of righting reflex suggesting status epilepticus and tonic extension. Pre-exposure of talampanel (2.5-10mg/kg, ip) 30min before kainic acid did not affect the onset of kainic acid convulsions. Talampanel at 20mg/kg, ip delayed the commencement of tonic extension, but not status-induced by kainic acid. In contrast, talampanel (5 and 10mg/kg, ip) when administered 5min after kainic acid (4mg/kg, ip) postponed the onset of status epilepticus and tonic extension compared to vehicle treated group. Furthermore, talampanel (10mg/kg, ip) but not GYKI 52466 (20 or 50mg/kg, ip; a non-competitive AMPA/kainate receptor antagonist) stopped the ongoing status epilepticus when administered 10min after the administration of kainic acid. However, seizures re-occurred after 35.98±2.36min. CONCLUSION The present results suggested that talampanel is protective in kainic acid-induced neonatal status epilepticus model; however, the time of administration is a crucial factor in determining its effectiveness.
Collapse
Affiliation(s)
- Ashish Dhir
- Neuropharmacology Division, Institute of R&D, Gujarat Forensic Sciences University, Gandhinagar, India.
| | - Vishal Chavda
- Neuropharmacology Division, Institute of R&D, Gujarat Forensic Sciences University, Gandhinagar, India
| |
Collapse
|
|
22
|
Wang Z, Chen Y, Lü Y, Chen X, Cheng L, Mi X, Xu X, Deng W, Zhang Y, Wang N, Li J, Li Y, Wang X. Effects of JIP3 on epileptic seizures: Evidence from temporal lobe epilepsy patients, kainic-induced acute seizures and pentylenetetrazole-induced kindled seizures. Neuroscience 2015; 300:314-24. [PMID: 26002316 DOI: 10.1016/j.neuroscience.2015.05.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 05/01/2015] [Accepted: 05/05/2015] [Indexed: 11/26/2022]
Abstract
JNK-interacting protein 3 (JIP3), also known as JNK stress-activated protein kinase-associated protein 1 (JSAP1), is a scaffold protein mainly involved in the regulation of the pro-apoptotic signaling cascade mediated by c-Jun N-terminal kinase (JNK). Overexpression of JIP3 in neurons in vitro has been reported to lead to accelerated activation of JNK and enhanced apoptosis response to cellular stress. However, the occurrence and the functional significance of stress-induced modulations of JIP3 levels in vivo remain elusive. In this study, we investigated the expression of JIP3 in temporal lobe epilepsy (TLE) and in a kainic acid (KA)-induced mouse model of epileptic seizures, and determined whether down-regulation of JIP3 can decrease susceptibility to seizures and neuron damage induced by KA. We found that JIP3 was markedly increased in TLE patients and a mouse model of epileptic seizures; mice underexpressing JIP3 through lentivirus bearing LV-Letm1-RNAi showed decreased susceptibility, delayed first seizure and decreased seizure duration response to the epileptogenic properties of KA. Subsequently, a decreased activation of JNK following seizure induction was observed in mice underexpressing JIP3, which also exhibited less neuronal apoptosis in the CA3 region of the hippocampus, as assessed three days after KA administration. We also found that mice underexpressing JIP3 exhibited a delayed pentylenetetrazole (PTZ)-induced kindling seizure process.
Collapse
Affiliation(s)
- Z Wang
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China; Department of Neurology, Fuling Central Hospital, Chongqing 408000, China
| | - Y Chen
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - Y Lü
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - X Chen
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - L Cheng
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - X Mi
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - X Xu
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - W Deng
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - Y Zhang
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - N Wang
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - J Li
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - Y Li
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China
| | - X Wang
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China.
| |
Collapse
|
|
23
|
Lin TY, Lu CW, Wang SJ, Huang SK. Protective effect of hispidulin on kainic acid-induced seizures and neurotoxicity in rats. Eur J Pharmacol 2015; 755:6-15. [PMID: 25746462 DOI: 10.1016/j.ejphar.2015.02.041] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 02/24/2015] [Accepted: 02/25/2015] [Indexed: 01/09/2023]
Abstract
Hispidulin is a flavonoid compound which is an active ingredient in a number of traditional Chinese medicinal herbs, and it has been reported to inhibit glutamate release. The purpose of this study was to investigate whether hispidulin protects against seizures induced by kainic acid, a glutamate analog with excitotoxic properties. The results indicated that intraperitoneally administering hispidulin (10 or 50mg/kg) to rats 30 min before intraperitoneally injecting kainic acid (15 mg/kg) increased seizure latency and decreased seizure score. In addition, hispidulin substantially attenuated kainic acid-induced hippocampal neuronal cell death, and this protective effect was accompanied by the suppression of microglial activation and the production of proinflammatory cytokines such as interleukin-1β, interleukin-6, and tumor necrosis factor-α in the hippocampus. Moreover, hispidulin reduced kainic acid-induced c-Fos expression and the activation of mitogen-activated protein kinases in the hippocampus. These data suggest that hispidulin has considerable antiepileptic, neuroprotective, and antiinflammatory effects on kainic acid-induced seizures in rats.
Collapse
Affiliation(s)
- Tzu Yu Lin
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Mechanical Engineering, Yuan Ze University, Taoyuan, Taiwan
| | - Cheng Wei Lu
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei City, Taiwan; Department of Mechanical Engineering, Yuan Ze University, Taoyuan, Taiwan
| | - Su Jane Wang
- Graduate Institute of Basic Medicine, Fu Jen Catholic University, No. 510, Zhongzheng Rd., Xinzhuang District, New Taipei City 24205, Taiwan.
| | - Shu Kuei Huang
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei City, Taiwan
| |
Collapse
|
|
24
|
Chiu KM, Wu CC, Wang MJ, Lee MY, Wang SJ. Protective Effects of Bupivacaine against Kainic Acid-Induced Seizure and Neuronal Cell Death in the Rat Hippocampus. Biol Pharm Bull 2015; 38:522-30. [DOI: 10.1248/bpb.b14-00633] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Kuan Ming Chiu
- Department of Nursing, Oriental Institute of Technology
- Division of Cardiovascular Surgery, Cardiovascular Center, Far-Eastern Memorial Hospital
| | - Chia Chan Wu
- Department of Anesthesiology, Far-Eastern Memorial Hospital
| | - Ming Jiuh Wang
- Department of Anesthesiology, National Taiwan University Hospital
| | - Ming Yi Lee
- Division of Cardiovascular Surgery, Cardiovascular Center, Far-Eastern Memorial Hospital
| | - Su Jane Wang
- School of Medicine, Fu Jen Catholic University
- Graduate Institute of Basic Medicine
| |
Collapse
|
|
25
|
Bhowmik M, Khanam R, Saini N, Vohora D. Activation of AKT/GSK3β pathway by TDZD-8 attenuates kainic acid induced neurodegeneration but not seizures in mice. Neurotoxicology 2015; 46:44-52. [DOI: 10.1016/j.neuro.2014.11.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 10/20/2014] [Accepted: 11/04/2014] [Indexed: 10/24/2022]
|
|
26
|
Ben J, de Oliveira PA, Gonçalves FM, Peres TV, Matheus FC, Hoeller AA, Leal RB, Walz R, Prediger RD. Effects of Pentylenetetrazole Kindling on Mitogen-Activated Protein Kinases Levels in Neocortex and Hippocampus of Mice. Neurochem Res 2014; 39:2492-500. [DOI: 10.1007/s11064-014-1453-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/07/2014] [Accepted: 10/07/2014] [Indexed: 10/24/2022]
|
|
27
|
Lin TY, Huang WJ, Wu CC, Lu CW, Wang SJ. Acacetin inhibits glutamate release and prevents kainic acid-induced neurotoxicity in rats. PLoS One 2014; 9:e88644. [PMID: 24520409 PMCID: PMC3919813 DOI: 10.1371/journal.pone.0088644] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 01/08/2014] [Indexed: 12/28/2022] Open
Abstract
An excessive release of glutamate is considered to be a molecular mechanism associated with several neurological diseases that causes neuronal damage. Therefore, searching for compounds that reduce glutamate neurotoxicity is necessary. In this study, the possibility that the natural flavone acacetin derived from the traditional Chinese medicine Clerodendrum inerme (L.) Gaertn is a neuroprotective agent was investigated. The effect of acacetin on endogenous glutamate release in rat hippocampal nerve terminals (synaptosomes) was also investigated. The results indicated that acacetin inhibited depolarization-evoked glutamate release and cytosolic free Ca2+ concentration ([Ca2+]C) in the hippocampal nerve terminals. However, acacetin did not alter synaptosomal membrane potential. Furthermore, the inhibitory effect of acacetin on evoked glutamate release was prevented by the Cav2.2 (N-type) and Cav2.1 (P/Q-type) channel blocker known as ω-conotoxin MVIIC. In a kainic acid (KA) rat model, an animal model used for excitotoxic neurodegeneration experiments, acacetin (10 or 50 mg/kg) was administrated intraperitoneally to the rats 30 min before the KA (15 mg/kg) intraperitoneal injection, and subsequently induced the attenuation of KA-induced neuronal cell death and microglia activation in the CA3 region of the hippocampus. The present study demonstrates that the natural compound, acacetin, inhibits glutamate release from hippocampal synaptosomes by attenuating voltage-dependent Ca2+ entry and effectively prevents KA-induced in vivo excitotoxicity. Collectively, these data suggest that acacetin has the therapeutic potential for treating neurological diseases associated with excitotoxicity.
Collapse
Affiliation(s)
- Tzu-Yu Lin
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei, Taiwan
- Department of Mechanical Engineering, Yuan Ze University, New Taipei, Taiwan
| | - Wei-Jan Huang
- Graduate Institute of Pharmacognosy, Taipei Medical University, Taipei, Taiwan
| | - Chia-Chan Wu
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei, Taiwan
| | - Cheng-Wei Lu
- Department of Anesthesiology, Far-Eastern Memorial Hospital, New Taipei, Taiwan
- Department of Mechanical Engineering, Yuan Ze University, New Taipei, Taiwan
| | - Su-Jane Wang
- Graduate Institute of Basic Medicine, Fu Jen Catholic University, New Taipei, Taiwan
- * E-mail:
| |
Collapse
|
|
28
|
Lin KC, Wang CC, Wang SJ. Bupropion attenuates kainic acid-induced seizures and neuronal cell death in rat hippocampus. Prog Neuropsychopharmacol Biol Psychiatry 2013; 45:207-14. [PMID: 23770308 DOI: 10.1016/j.pnpbp.2013.05.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 05/30/2013] [Accepted: 05/30/2013] [Indexed: 11/17/2022]
Abstract
Excessive release of glutamate is believed to be a major component of cell damage following excitotoxicity associated with epilepsy. Bupropion, an atypical antidepressant, has been shown to inhibit glutamate release from rat cerebrocortical nerve terminals. The present study was undertaken to investigate whether bupropion has anti-seizure and anti-excitotoxic effects by using a kainic acid (KA) rat seizure model, an animal model for temporal lobe epilepsy and excitotoxic neurodegeneration. Our results show that bupropion (10 or 50mg/kg), administrated intraperitoneally to the rats 30 min before the KA (15 mg/kg) intraperitoneal injection, increased the seizure latency and decreased the seizure score. Bupropion pretreatment attenuated KA-induced neuronal cell death and microglia activation in the CA3 region of the hippocampus. Furthermore, KA-induced c-Fos expression and extracellular signal-regulated kinase 1/2 (ERK1/2) phosphorylation in the hippocampus were also reduced by bupropion pretreatment. These results suggest that bupropion has therapeutic potential in the treatment of seizure and other neurological diseases associated with excitotoxicity.
Collapse
Affiliation(s)
- Kao-Chang Lin
- Department of Neurology, Chi Mei Medical Center, Biotechnology, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | | | | |
Collapse
|
|
29
|
Dunleavy M, Provenzano G, Henshall DC, Bozzi Y. Kainic acid-induced seizures modulate Akt (SER473) phosphorylation in the hippocampus of dopamine D2 receptor knockout mice. J Mol Neurosci 2012. [PMID: 23188702 PMCID: PMC3532719 DOI: 10.1007/s12031-012-9927-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Dopamine D2 receptor (D2R) signalling has been shown to modulate seizure-induced hippocampal cell death. D2R knockout (D2R−/−) mice are more susceptible to kainic acid (KA)-induced excitotoxicity, displaying cell death in the CA3 subfield of the hippocampus at KA doses not damaging in wild-type (WT) animals. Absence of D2R signalling in the hippocampus leads to activation (dephosphorylation) of glycogen synthase kinase 3β (GSK-3β) after KA (20 mg/kg), which is not associated with a change in the phosphorylation of the GSK-3β regulator Akt at the canonical threonine 308 residue. In the present study, we investigated alternative pathways responsible for the activation of GSK-3β in the hippocampus of the D2R−/− mice 24 h following KA-induced seizures. Here, we show that phosphorylation of Akt occurs at serine 473 (Ser473) in the CA3 region of WT but not D2R−/− mice following KA. Moreover, the CA1 subregion, which does not undergo neurodegeneration in either WT or D2R−/− mice, displays a strong induction of Akt (Ser473) phosphorylation after KA. Additionally, the vulnerability in the CA3 is not associated with changes to p38MAPK and Dishevelled activation, and β-catenin does not appear to be a downstream target of the GSK-3β. Thus, we propose that GSK-3β phosphorylation-mediated hippocampal cell survival may depend on Akt (Ser473) phosphorylation; loss of D2R-mediated signalling in the CA3 region of D2R−/− mice leads to reduced Akt (Ser473) phosphorylation rendering neurons more vulnerable to apoptosis. Further investigation is required to fully elucidate the GSK-3β targets involved in D2R-dependent response to excitotoxicity.
Collapse
Affiliation(s)
- Mark Dunleavy
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Laboratory of Molecular Neuropathology, Centre for Integrative Biology (CIBIO), University of Trento, Via delle Regole 101, Mattarello, 38123 Trento, Italy
| | - Giovanni Provenzano
- Laboratory of Molecular Neuropathology, Centre for Integrative Biology (CIBIO), University of Trento, Via delle Regole 101, Mattarello, 38123 Trento, Italy
| | - David C. Henshall
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Yuri Bozzi
- Laboratory of Molecular Neuropathology, Centre for Integrative Biology (CIBIO), University of Trento, Via delle Regole 101, Mattarello, 38123 Trento, Italy
| |
Collapse
|
|
30
|
Wei XW, Yan H, Xu B, Wu YP, Li C, Zhang GY. Neuroprotection of co-activation of GABA receptors by preventing caspase-3 denitrosylation in KA-induced seizures. Brain Res Bull 2012; 88:617-23. [PMID: 22613773 DOI: 10.1016/j.brainresbull.2012.05.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 05/07/2012] [Accepted: 05/09/2012] [Indexed: 12/19/2022]
Abstract
Previous studies have demonstrated that kainic acid (KA)-induced seizures can cause the enhancement of excitation and lead to neuronal death in rat hippocampus. Co-activation of the inhibitory GABA receptors can attenuate the excitatory JNK3 apoptotic signaling pathway via inhibiting the increased assembly of the GluR6-PSD-95-MLK3 signaling module induced by KA in epileptic rat hippocampal CA1 and CA3 regions. Caspase-3 is a cysteine protease located in both the cytoplasm and mitochondrial intermembrane space that is a central effector of many apoptotic pathways. We designed experiments to elucidate the underlying molecular mechanisms of procaspase-3 activation and neuroprotection of co-activation of GABA receptors against neuronal death induced by KA. In this study, we show that co-activation of GABA receptors can attenuate the Fas/FasL apoptotic signaling pathway and inhibit the increased of thioredoxin reductase activity induced by KA, subsequently inhibit the activation of procaspase-3 by diminishing the denitrosylation of its active-site thiol and decreasing the cleavage of the caspase-3 zymogen to its active subunits. These results indicate that co-activation of GABA receptors results in neuroprotection by preventing caspase-3 denitrosylation in KA-induced seizure of rats.
Collapse
Affiliation(s)
- Xue-Wen Wei
- Jiangsu Key Laboratory of Brain Disease Bioinformation and Research Center of Biochemistry and Molecular Biochemistry, Xuzhou Medical College, Xuzhou 221002, China
| | | | | | | | | | | |
Collapse
|
|
31
|
Li MM, Wu LY, Zhao T, Wu KW, Xiong L, Zhu LL, Fan M. The protective role of 5-hydroxymethyl-2-furfural (5-HMF) against acute hypobaric hypoxia. Cell Stress Chaperones 2011; 16:529-37. [PMID: 21494793 PMCID: PMC3156263 DOI: 10.1007/s12192-011-0264-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 03/17/2011] [Accepted: 03/18/2011] [Indexed: 01/18/2023] Open
Abstract
Our previous study showed that pretreatment with 5-hydroxymethyl-2-furfural (5-HMF) led to protection against hypoxic injury via a p-ERK-mediated pathway in vitro. Whether the protection of 5-HMF against hypoxia is effective in vivo is unknown. The present study is aimed to verify the role of 5-HMF in acute hypobaric hypoxia using Kunming mice as an in vivo model and further investigate the underlying mechanisms. Mice pretreated with or without 5-HMF for 1 h were exposed to acute hypobaric hypoxic condition for 6 h and then the survival time, the survival rate, the permeability of blood-brain barrier (BBB), the histological analysis in hippocampus and cortex, and the phosphorylation level of mitogen-activated protein kinases (ERK, JNK, and p38) were investigated. The results showed that 5-HMF significantly increased the survival time and the survival rate of mice. Accordingly, pretreatment with 5-HMF markedly attenuated acute hypobaric hypoxia-induced permeability of BBB (P < 0.01). In addition, the cellular damage extent of the hippocampus and the cortex induced by hypoxia for 6 h was also attenuated by pretreatment with 5-HMF, especially in the hippocampus CA1 region. Furthermore, the activation of ERK rather than JNK and p38 was involved in the protection of 5-HMF against acute hypobaric hypoxia. In summary, 5-HMF enhanced the survival capability of mice and decreased acute hypoxic damage to the brain, which may be associated with the effects on BBB and p-ERK.
Collapse
Affiliation(s)
- Ming-Ming Li
- Department of Neurobiology, Beijing Institute for Neuro-Science, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 People’s Republic of China
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Li-Ying Wu
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Tong Zhao
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Kui-Wu Wu
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Lei Xiong
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Ling-Ling Zhu
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| | - Ming Fan
- Department of Neurobiology, Beijing Institute for Neuro-Science, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 People’s Republic of China
- Department of Brain Protection and Plasticity, Institute of Basic Medical Sciences, No. 27 Taiping Rd., Beijing, 100850 People’s Republic of China
| |
Collapse
|
|
32
|
Fradejas N, Del Carmen Serrano-PÉREZ M, Tranque P, Calvo S. Selenoprotein S expression in reactive astrocytes following brain injury. Glia 2011; 59:959-72. [DOI: 10.1002/glia.21168] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Accepted: 02/21/2011] [Indexed: 02/05/2023]
|
|
33
|
Byun JS, Lee JW, Kim SY, Kwon KJ, Sohn JH, Lee K, Oh D, Kim SS, Chun W, Lee HJ. Neuroprotective effects of stanniocalcin 2 following kainic acid-induced hippocampal degeneration in ICR mice. Peptides 2010; 31:2094-9. [PMID: 20713105 DOI: 10.1016/j.peptides.2010.08.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Revised: 08/04/2010] [Accepted: 08/08/2010] [Indexed: 02/06/2023]
Abstract
Stanniocalcin 2 (STC2), the paralog of STC1, has been shown to act as a novel target of the mammalian unfolded protein response. We investigated the potential neuroprotective actions of STC2 against kainic acid toxicity in the hippocampus of ICR mice. STC2-treated mice experienced less neuronal cell loss in the CA3 area of the hippocampus. Also, microglial activation and heme oxygenase 1 expression were attenuated in the hippocampus of STC2-treated mice. To confirm whether STC2 regulates microglial activation directly, nitric oxide levels were measured in BV2 cells cultured with and without 10nM STC2. STC2 decreased the level of nitric oxide induced by lipopolysaccharide (LPS) treatment significantly. Also, STC2 pretreatment significantly decreased TNF-α and IL-1β expression induced by LPS treatment. These observations demonstrated that STC2 exerts neuroprotective actions against excitotoxic insults through the inhibition of microglial activation.
Collapse
Affiliation(s)
- Jong-Seon Byun
- Department of Pharmacology, School of Medicine, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
|
34
|
Serrano-Pérez MC, Martín ED, Vaquero CF, Azcoitia I, Calvo S, Cano E, Tranque P. Response of transcription factor NFATc3 to excitotoxic and traumatic brain insults: Identification of a subpopulation of reactive astrocytes. Glia 2010; 59:94-107. [DOI: 10.1002/glia.21079] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Accepted: 08/23/2010] [Indexed: 01/21/2023]
|
|
35
|
Sonn K, Pankratova S, Korshunova I, Zharkovsky A, Bock E, Berezin V, Kiryushko D. A metallothionein mimetic peptide protects neurons against kainic acid-induced excitotoxicity. J Neurosci Res 2010; 88:1074-82. [PMID: 19937811 DOI: 10.1002/jnr.22281] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Metallothioneins I and II (MTI/II) are metal-binding proteins overexpressed in response to brain injury. Recently, we have designed a peptide, termed EmtinB, which is modeled after the beta-domain of MT-II and mimics the biological effects of MTI/II in vitro. Here, we demonstrate the neuroprotective effect of EmtinB in the in vitro and in vivo models of kainic acid (KA)-induced neurotoxicity. We show that EmtinB passes the blood-brain barrier and is detectable in plasma for up to 24 hr. Treatment with EmtinB significantly attenuates seizures in C57BL/6J mice exposed to moderate (20 mg/kg) and high (30 mg/kg) KA doses and tends to decrease mortality induced by the high KA dose. Histopathological evaluation of hippocampal (CA3 and CA1) and cortical areas of mice treated with 20 mg/kg KA shows that EmtinB treatment reduces KA-induced neurodegeneration in the CA1 region. These findings establish EmtinB as a promising target for therapeutic development.
Collapse
Affiliation(s)
- Katrin Sonn
- Protein Laboratory, Department of Neuroscience and Pharmacology, Panum Institute, Copenhagen, Denmark
| | | | | | | | | | | | | |
Collapse
|
|
36
|
Spigolon G, Veronesi C, Bonny C, Vercelli A. c-Jun N-terminal kinase signaling pathway in excitotoxic cell death following kainic acid-induced status epilepticus. Eur J Neurosci 2010; 31:1261-72. [DOI: 10.1111/j.1460-9568.2010.07158.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
|
37
|
Yalcin A, Armagan G, Turunc E, Konyalioglu S, Kanit L. Potential neuroprotective effect of γ-glutamylcysteine ethyl ester on rat brain against kainic acid-induced excitotoxicity. Free Radic Res 2010; 44:513-21. [DOI: 10.3109/10715761003645964] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
|
38
|
Park HJ, Rajbhandari I, Yang HS, Lee S, Cucoranu D, Cooper DS, Klein JD, Sands JM, Choi I. Neuronal expression of sodium/bicarbonate cotransporter NBCn1 (SLC4A7) and its response to chronic metabolic acidosis. Am J Physiol Cell Physiol 2010; 298:C1018-28. [PMID: 20147654 DOI: 10.1152/ajpcell.00492.2009] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The sodium-bicarbonate cotransporter NBCn1 (SLC4A7) is an acid-base transporter that normally moves Na(+) and HCO(3)(-) into the cell. This membrane protein is sensitive to cellular and systemic pH changes. We examined NBCn1 expression and localization in the brain and its response to chronic metabolic acidosis. Two new NBCn1 antibodies were generated by immunizing a rabbit and a guinea pig. The antibodies stained neurons in a variety of rat brain regions, including hippocampal pyramidal neurons, dentate gyrus granular neurons, posterior cortical neurons, and cerebellar Purkinje neurons. Choroid plexus epithelia were also stained. Double immunofluorescence labeling showed that NBCn1 and the postsynaptic density protein PSD-95 were found in the same hippocampal CA3 neurons and partially colocalized in dendrites. PSD-95 was pulled down from rat brain lysates with the GST/NBCn1 fusion protein and was also coimmunoprecipitated with NBCn1. Chronic metabolic acidosis was induced by feeding rats with normal chow or 0.4 M HCl-containing chow for 7 days. Real-time PCR and immunoblot showed upregulation of NBCn1 mRNA and protein in the hippocampus of acidotic rats. NBCn1 immunostaining was enhanced in CA3 neurons, posterior cortical neurons, and cerebellar granular cells. Intraperitoneal administration of N-methyl-d-aspartate caused neuronal death determined by caspase-3 activity, and this effect was more severe in acidotic rats. Administering N-methyl-d-aspartate also inhibited NBCn1 upregulation in acidotic rats. We conclude that NBCn1 in neurons is upregulated by chronic acid loads, and this upregulation is associated with glutamate excitotoxicity.
Collapse
Affiliation(s)
- Hae Jeong Park
- Dept. of Physiology, Emory Univ., Atlanta, GA 30322, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
|
39
|
Liang Z, Liu F, Iqbal K, Grundke-Iqbal I, Gong CX. Dysregulation of tau phosphorylation in mouse brain during excitotoxic damage. J Alzheimers Dis 2009; 17:531-9. [PMID: 19363259 DOI: 10.3233/jad-2009-1069] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Glutamate receptor-mediated excitotoxicity is thought to contribute to the development of Alzheimer's disease (AD), but the underlying mechanism is unknown. In this study, we investigated the dynamic changes of tau phosphorylation and tau-related protein kinases and protein phosphatase 2A (PP2A) in the mouse brain during excitotoxicity induced by intraperitoneal injection of 20 mg/kg kainic acid (KA). We found that KA-induced excitotoxicity led to transient dephosphorylation of tau (within 6 hr post-injection), followed by sustained hyperphosphorylation of tau at multiple sites that are hyperphosphorylated in AD brain. The initial dephosphorylation of tau may result from activation of PP2A, and the sustained hyperphosphorylation may be due mainly to activation of cdk5 and down-regulation of PP2A during the later phase. Because abnormal hyperphosphorylation of tau plays a crucial role in neurodegeneration and in the formation of neurofibrillary tangles, our results suggest that glutamate receptor-mediated excitotoxicity might contribute to AD partially via promoting abnormal hyperphosphorylation of tau in AD brain.
Collapse
Affiliation(s)
- Zhihou Liang
- Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY 10314-6399, USA
| | | | | | | | | |
Collapse
|
|
40
|
Liu C, Lin N, Wu B, Qiu Y. Neuroprotective effect of memantine combined with topiramate in hypoxic-ischemic brain injury. Brain Res 2009; 1282:173-82. [PMID: 19501064 DOI: 10.1016/j.brainres.2009.05.071] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2009] [Revised: 05/19/2009] [Accepted: 05/20/2009] [Indexed: 02/05/2023]
Abstract
Glutamate receptor-mediated neurotoxicity is a major mechanism contributing to hypoxic-ischemic brain injury (HIBI). Memantine is a safe non-competitive NMDA receptor blocker characterized by its low affinity and fast unblocking kinetics. Topiramate is an AMPA/KA receptor blocker and use-dependent sodium channel blocker with several other neuroprotective actions and little neurotoxicity. We hypothesized that the coadministration of memantine and topiramate would be highly effective to attenuate HIBI in neonatal rats. Seven-day-old Sprague-Dawley rat pups were subjected to right common carotid artery ligation and hypoxia for 2 h, and then were randomly and blindly assigned to one of four groups: vehicle, memantine, topiramate and combination group. Brain injury was evaluated by gross damage and weight deficit of the right hemisphere at 22d after hypoxic-ischemia (HI) and by neurofunctional assessment (foot-fault test) at 21d post-HI. Acute neuronal injury was also evaluated by microscopic damage grading at 72 h post-HI. Results showed the combination of memantine and topiramate improved both pathological outcome and performance significantly. The drug-induced apoptotic neurodegeneration was assessed by TUNEL staining at 48 h post-HI and the result showed no elevated apoptosis in all observed areas. The result of the experiment indicates the combination therapy is safe and highly effective to reduce brain damage after HIBI.
Collapse
Affiliation(s)
- Chunhua Liu
- Department of Pediatrics, The First Affiliated Hospital of Shantou University Medical College, 515000, Shantou, China
| | | | | | | |
Collapse
|
|
41
|
Mohammadi S, Pavlik A, Krajci D, Al-Sarraf H. NMDA preconditioning and neuroprotection in vivo: Delayed onset of kainic acid-induced neurodegeneration and c-Fos attenuation in CA3a neurons. Brain Res 2009; 1256:162-72. [DOI: 10.1016/j.brainres.2008.12.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 12/04/2008] [Accepted: 12/05/2008] [Indexed: 01/04/2023]
|
|
42
|
Effect of topiramate on cognitive function and single units from hippocampal place cells following status epilepticus. Epilepsy Behav 2009; 14:40-7. [PMID: 18929683 DOI: 10.1016/j.yebeh.2008.09.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2008] [Revised: 09/16/2008] [Accepted: 09/18/2008] [Indexed: 11/24/2022]
Abstract
Topiramate, an antiepileptic drug with multiple mechanisms of action, was assessed as a neuroprotective agent following status epilepticus. We administered topiramate or normal saline chronically beginning 1 hour after cessation of lithium pilocarpine-induced status epilepticus. Control animals not subjected to status epilepticus were also treated with topiramate or normal saline. Following completion of the topiramate treatment, animals were tested in the water maze to assess spatial learning and underwent in vivo single-cell place cell recordings. Spontaneous seizure frequency following status epilepticus in the topiramate-treated rats was similar to that in the rats treated with saline. Following status epilepticus, rats had profound deficits in water maze performance and place cell function. Rats subjected to status epilepticus and treated with topiramate were also severely impaired in the water maze, but performed slightly better than rats treated with saline. Following status epilepticus, topiramate-treated rats did not differ from rats treated with normal saline in the platform switch, a test of prefrontal function. Although place cell firing patterns were similar in both the topiramate- and saline-treated rats, rats treated with topiramate had higher information content scores than rats treated with saline. Topiramate-treated animals had less supragranular sprouting following status epilepticus than nontreated rats. Control animals treated with topiramate did not differ from saline-treated controls on any measures. Taken together, this study shows that topiramate administered following status epilepticus has modest neuroprotective effects.
Collapse
|