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Huang Y, Chi W, Li Y, Zhang C, Li J, Meng F. Morphine Preconditioning Alleviates Ischemia/Reperfusion-induced Caspase-8-dependent Neuronal Apoptosis through cPKCγ-NF-κB-cFLIPL Pathway. J Neurosurg Anesthesiol 2024:00008506-990000000-00103. [PMID: 38577840 DOI: 10.1097/ana.0000000000000963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 02/28/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Perioperative cerebral ischemia/reperfusion injury is a major contributor to postoperative death and cognitive dysfunction in patients. It was reported that morphine preconditioning (MP) can mimic ischemia/hypoxia preconditioning to protect against ischemia/reperfusion injury. However, the mechanism of MP on the ischemia/reperfusion-induced neuronal apoptosis has not been fully clarified. METHODS The middle cerebral artery occlusion/reperfusion (MCAO/R) model of mice and the oxygen-glucose deprivation/reoxygenation (OGD/R) model in primary cortical neurons were used to mimic ischemic stroke. In vivo, the infarct size was measured by using TTC staining; NDSS, Longa score system, and beam balance test were performed to evaluate the neurological deficits of mice; the expression of the protein was detected by using a western blot. In vitro, the viability of neurons was determined by using CCK-8 assay; the expression of protein and mRNA were assessed by using western blot, RT-qPCR, and immunofluorescent staining; the level of apoptosis was detected by using TUNEL staining. RESULTS MP can improve the neurological functions of mice following MCAO/R (P<0.001, n=10 per group). MP can decrease the infarct size (P<0.001, n=10 per group) and the level of cleaved-caspase-3 of mice following MCAO/R (P<0.01 or 0.001, n=6 per group). MP can increase the levels of cPKCγ membrane translocation, p-p65, and cFLIPL, and decrease the levels of cleaved-caspase-8, 3 in neurons after OGD/R or MCAO/R 1 d (P<0.05, 0.01 or 0.001, n=6 per group). In addition, MP could alleviate OGD/R-induced cell apoptosis (P<0.001, n=6 per group). CONCLUSION MP alleviates ischemia/reperfusion-induced Caspase 8-dependent neuronal apoptosis through the cPKCγ-NF-κB-cFLIPL pathway.
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Affiliation(s)
- Yaru Huang
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, PR China
| | - Wenying Chi
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, PR China
| | - Yan Li
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, PR China
| | - Chengzhen Zhang
- Department of Anesthesiology, Shandong First Medical University, Jinan, Shandong, PR China
| | - Junfa Li
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, PR China
- Department of Neurobiology, Capital Medical University, Beijing, PR China
| | - Fanjun Meng
- Department of Anesthesiology, Central Hospital Affiliated to Shandong First Medical University, Shandong, PR China
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Wei HP, Peng ZF, Shao KM, Zhang PH, Chen L, Hu JA, Chai H, Liu JM. cPKCγ Inhibits Caspase-9-Initiated Neuronal Apoptosis in an Ischemia Reperfusion Model In Vitro Through p38 MAPK-p90RSK-Bad Pathway. Neurochem Res 2023; 48:362-374. [PMID: 36152136 DOI: 10.1007/s11064-022-03747-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 08/03/2022] [Accepted: 08/30/2022] [Indexed: 02/08/2023]
Abstract
Strokes are one of the leading causes of death and disability in the world. Previously we have found that conventional protein kinase Cγ (cPKCγ) plays neuroprotective role in ischemic strokes. Further, we found that cPKCγ knockdown increased the level of cleaved (cl)-Caspase-3. However, the precise mechanisms underlying cPKCγ-mediated neuronal death remain unclear. To this end, a model incorporating 1 h oxygen-glucose deprivation/24 h reoxygenation (1 h OGD/24 h R) was established in cortical neurons. We found that cPKCγ knockdown remarkably increased neuronal death after OGD. We also found that cPKCγ knockdown increased the level of cl-Caspase-3 through the upstream initiators Capsases-9 (not Caspase-8/12) in OGD-treated neurons. Overexpression of cPKCγ could decrease neuronal death and cl-Caspase-3 and -9 levels. Moreover, cPKCγ knockdown further reduced the phosphorylation levels of p38 MAPK, p90RSK, and Bad. In addition, the protein levels of Bcl-2 and Bcl-xl were decreased after cPKCγ knockdown, whereas that of Bax was increased. In conclusion, our results suggest that cPKCγ partly alleviates ischemic injury through activating the p38 MAPK-p90RSK-Bad pathway and inhibiting Caspase-9 initiated apoptosis. This may have potential as a therapeutic target for ischemic stroke.
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Affiliation(s)
- Hai-Ping Wei
- Department of Neurology, Lanzhou University Second Hospital, No. 82 Cuiyingmen Street, Chengguan District, Lanzhou, 730030, Gansu, China.
| | - Zhi-Feng Peng
- Department of Physiology, School of Medicine, Shanxi Datong University, Xingyun Street, Pingcheng District, Datong, 037009, Shanxi, China
| | - Kang-Mei Shao
- The Second Clinical Medical College, Lanzhou University Second Hospital, No. 82 Cuiyingmen Street, Chengguan District, Lanzhou, 730030, Gansu, China
| | - Pei-Hao Zhang
- The Second Clinical Medical College, Lanzhou University Second Hospital, No. 82 Cuiyingmen Street, Chengguan District, Lanzhou, 730030, Gansu, China
| | - Lei Chen
- The Second Clinical Medical College, Lanzhou University Second Hospital, No. 82 Cuiyingmen Street, Chengguan District, Lanzhou, 730030, Gansu, China
| | - Jin-An Hu
- The Second Clinical Medical College, Lanzhou University Second Hospital, No. 82 Cuiyingmen Street, Chengguan District, Lanzhou, 730030, Gansu, China
| | - Hui Chai
- The Second Clinical Medical College, Lanzhou University Second Hospital, No. 82 Cuiyingmen Street, Chengguan District, Lanzhou, 730030, Gansu, China
| | - Jin-Mei Liu
- The Second Clinical Medical College, Lanzhou University Second Hospital, No. 82 Cuiyingmen Street, Chengguan District, Lanzhou, 730030, Gansu, China
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Zhang G, Lai Z, Gu L, Xu K, Wang Z, Duan Y, Chen H, Zhang M, Zhang J, Zhao Z, Wang S. Delta Opioid Receptor Activation with Delta Opioid Peptide [d-Ala2, d-Leu5] Enkephalin Contributes to Synaptic Improvement in Rat Hippocampus against Global Ischemia. Cell Transplant 2021; 30:9636897211041585. [PMID: 34470528 PMCID: PMC8419564 DOI: 10.1177/09636897211041585] [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] [Indexed: 11/28/2022] Open
Abstract
Global cerebral ischemia induced by cardiac arrest usually leads to poor neurological outcomes. Numerous studies have focused on ways to prevent ischemic damage in the brain, however clinical therapies are still limited. Our previous studies revealed that delta opioid receptor (DOR) activation with [d-Ala2, d-Leu5] enkephalin (DADLE), a DOR agonist, not only significantly promotes neuronal survival on day 3, but also improves spatial memory deficits on days 5-9 after ischemia. However, the neurological mechanism underlying DADLE-induced cognitive recovery remains unclear. This study first examined the changes in neuronal survival in the CA1 region at the advanced time point (day 7) after ischemia/reperfusion (I/R) injury and found a significant amelioration of damaged CA1 neurons in the rats treated with DADLE (2.5 nmol) when administered at the onset of reperfusion. The structure and function of CA1 neurons on days 3 and 7 post-ischemia showed significant improvements in both the density of the injured dendritic spines and the basic transmission of the impaired CA3-CA1 synapses following DADLE treatment. The molecular changes involved in DADLE-mediated synaptic modulation on days 3 and 7 post-ischemia implied the time-related differential regulation of PKCα-MARCKS on the dendritic spine structure and of BDNF- ERK1/2-synapsin I on synaptic function, in response to ischemic/reperfusion injury as well as to DADLE treatment. Importantly, all the beneficial effects of DADLE on ischemia-induced cellular, synaptic, and molecular deficits were eliminated by the DOR inhibitor naltrindole (2.5 nmol). Taken together, this study suggested that DOR activation-induced protective signaling pathways of PKCα-MARCKS involved in the synaptic morphology and BDNF-ERK-synapsin I in synaptic transmission may be engaged in the cognitive recovery in rats suffering from advanced cerebral ischemia.
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Affiliation(s)
- Guangming Zhang
- Department of Anesthesiology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200336, China
| | - Zelin Lai
- Shanghai Key Laboratory of Brain Functional Genomics, Ministry of Education, School of Life Sciences, East China Normal University, Shanghai 200062, China
| | - Lingling Gu
- Shanghai Key Laboratory of Brain Functional Genomics, Ministry of Education, School of Life Sciences, East China Normal University, Shanghai 200062, China
| | - Kejia Xu
- Department of Anesthesiology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200336, China
| | - Zhenlu Wang
- Shanghai Key Laboratory of Brain Functional Genomics, Ministry of Education, School of Life Sciences, East China Normal University, Shanghai 200062, China
| | - Yale Duan
- Shanghai Key Laboratory of Brain Functional Genomics, Ministry of Education, School of Life Sciences, East China Normal University, Shanghai 200062, China
| | - Huifen Chen
- Department of Clinical Laboratory, Shanghai First Maternity and Infant Hospital
| | - Min Zhang
- Tongji University School of Medicine, Shanghai 201204, China
| | - Jun Zhang
- Department of Clinical Laboratory, Shanghai First Maternity and Infant Hospital.,Tongji University School of Medicine, Shanghai 201204, China
| | - Zheng Zhao
- Shanghai Key Laboratory of Brain Functional Genomics, Ministry of Education, School of Life Sciences, East China Normal University, Shanghai 200062, China
| | - Shuyan Wang
- Department of Anesthesiology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200336, China
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Zhao XY, Li JF, Li TZ, Pan CX, Xue FS, Wang GY. Morphine pretreatment protects against cerebral ischemic injury via a cPKCγ-mediated anti-apoptosis pathway. Exp Ther Med 2021; 22:1016. [PMID: 34373702 DOI: 10.3892/etm.2021.10448] [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] [Received: 01/14/2021] [Accepted: 06/21/2021] [Indexed: 12/26/2022] Open
Abstract
It has been reported that morphine pretreatment (MP) can exert neuroprotective effects, and that protein kinase C (PKC) participates in the initiation and development of ischemic/hypoxic preconditioning in the brain. However, it remains unknown whether PKC is involved in MP-induced neuroprotection. The aim of the present study, which included in vivo and in vitro experiments, was to determine whether the conventional γ isoform of PKC (cPKCγ) was involved in the protective effects of MP against cerebral ischemic injury. The present study included an in vivo experiment using a mouse model of middle cerebral artery occlusion and an in vitro experiment using neuroblastoma N2a cells with oxygen-glucose deprivation (OGD). Furthermore, a cPKCγ antagonist, Go6983, was used to determine the involvement of cPKCγ in the protective effects of MP against cerebral ischemic injury. In the in vivo experiment, neurological deficits, ischemic infarct volume, neural cell damage, apoptosis and caspase-3 activation were evaluated. In the in vitro experiment, flow cytometry was used to determine the activation of caspase-3 in N2a cells with OGD. It was found that MP protected against cerebral ischemic injury. However, intracerebroventricular injection of the cPKCγ antagonist before MP attenuated the neuroprotective effect of MP and increased the activation of cleaved caspase-3. These findings suggested that MP may provide protection against cerebral ischemic injury via a cPKCγ-mediated anti-apoptosis pathway.
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Affiliation(s)
- Xiao-Yan Zhao
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
| | - Jun-Fa Li
- Department of Neurobiology, Capital Medical University; Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, P.R. China
| | - Tian-Zuo Li
- Department of Anesthesiology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, P.R. China
| | - Chu-Xiong Pan
- Department of Anesthesiology, Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, P.R. China
| | - Fu-Shan Xue
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P.R. China
| | - Gu-Yan Wang
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
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Ju ZH, Liang X, Ren YY, Shu LW, Yan YH, Cui X. Neurons derived from human-induced pluripotent stem cells express mu and kappa opioid receptors. Neural Regen Res 2021; 16:653-658. [PMID: 33063716 PMCID: PMC8067944 DOI: 10.4103/1673-5374.295341] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Neuroprotection studies have shown that induced pluripotent stem (iPS) cells have the possibility to transform neuroprotection research. In the present study, iPS cells were generated from human renal epithelial cells and were then differentiated into neurons. Cells in the iPS-cell group were maintained in stem cell medium. In contrast, cells in the iPS-neuron group were first maintained in neural induction medium and expansion medium containing ROCK inhibitors, and then cultivated in neuronal differentiation medium and neuronal maturation medium to induce the neural stem cells to differentiate into neurons. The expression of relevant markers was compared at different stages of differentiation. Immunofluorescence staining revealed that cells in the iPS-neuron group expressed the neural stem cell markers SOX1 and nestin on day 11 of induction, and neuronal markers TUBB3 and NeuN on day 21 of induction. Polymerase chain reaction results demonstrated that, compared with the iPS-cell group, TUBB3 gene expression in the iPS-neuron group was increased 15.6-fold. Further research revealed that, compared with the iPS-cell group, the gene expression and immunoreactivity of mu opioid receptor in the iPS-neuron group were significantly increased (38.3-fold and 5.7-fold, respectively), but those of kappa opioid receptor had only a slight change (1.33-fold and 1.57-fold increases, respectively). Together, these data indicate that human iPS cells can be induced into mu opioid receptor- and kappa opioid receptor-expressing neurons, and that they may be useful to simulate human opioid receptor function in vitro and explore the underlying mechanisms of human conditions.
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Affiliation(s)
- Zhi-Hai Ju
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Xuan Liang
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Yao-Yao Ren
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Luo-Wa Shu
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Yan-Hong Yan
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Xu Cui
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
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Guo R, Sun Y, Li H, Ma D, Wang Y. Upregulation of spinal glucose-dependent insulinotropic polypeptide receptor induces membrane translocation of PKCγ and synaptic target of AMPA receptor GluR1 subunits in dorsal horns in a rat model of incisional pain. Neurochem Int 2019; 134:104651. [PMID: 31870892 DOI: 10.1016/j.neuint.2019.104651] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 12/16/2019] [Accepted: 12/19/2019] [Indexed: 01/28/2023]
Abstract
It is unclear whether glucose-dependent insulinotropic polypeptide receptor (GIPR) signaling plays an important role in spinal nociception. We hypothesized that the spinal GIPR is implicated in central sensitization of postoperative pain. Our data showed that the cumulative pain scores peaked at 3 h, kept at a high level at 1 d after incision, gradually decreased afterwards and returned to the baseline values at 5 d after incision. Correspondingly, the expression of GIPR in spinal cord dorsal horn peaked at 1 d after incision, and returned to the baseline value at 5 d after incision. The double-labeling immunofluorescence demonstrated that spinal GIPR was expressed in dorsal horn neurons, but not in astrocyte or microglial cells. At 1 d after incision, the effects of intrathecal saline, GIPR antagonist (Pro3)GIP on pain behaviors were investigated. Our data showed that at 30 min and 60 min following intrathecal treatments of 300 ng (Pro3)GIP, the cumulative pain scores were decreased and paw withdrawal thresholds to mechanical stimuli were increased when compared to those immediately before intrathecal treatments. Accordingly, at 30 min after intrathecal injections, the membrane translocation levels of PKCγ and the GluR1 expression in postsynaptic membrane in ipsilateral dorsal horns to the incision were significantly upregulated in rats with intrathecal saline injections, as compared to normal control group. At 30 min after intrathecal treatment, (Pro3)GIP inhibited the membrane translocation levels of PKCγ and the GluR1 expression in postsynaptic membrane in ipsilateral dorsal horns. Our study indicates that upregulation of spinal GIPR may contribute to pain hypersensitivity through inducing membrane translocation level of PKCγ and synaptic target of AMPA receptor GluR1 subunits in ipsilateral dorsal horns of rats with plantar incision.
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Affiliation(s)
- Ruijuan Guo
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Yuqing Sun
- Department of Anesthesiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China
| | - Huili Li
- Department of Anesthesiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China
| | - Danxu Ma
- Department of Anesthesiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China
| | - Yun Wang
- Department of Anesthesiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China.
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Pastore D, Pacifici F, Dave KR, Palmirotta R, Bellia A, Pasquantonio G, Guadagni F, Donadel G, Di Daniele N, Abete P, Lauro D, Rundek T, Perez-Pinzon MA, Della-Morte D. Age-Dependent Levels of Protein Kinase Cs in Brain: Reduction of Endogenous Mechanisms of Neuroprotection. Int J Mol Sci 2019; 20:E3544. [PMID: 31331067 PMCID: PMC6678180 DOI: 10.3390/ijms20143544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/15/2019] [Accepted: 07/17/2019] [Indexed: 02/07/2023] Open
Abstract
Neurodegenerative diseases are among the leading causes of mortality and disability worldwide. However, current therapeutic approaches have failed to reach significant results in their prevention and cure. Protein Kinase Cs (PKCs) are kinases involved in the pathophysiology of neurodegenerative diseases, such as Alzheimer's Disease (AD) and cerebral ischemia. Specifically ε, δ, and γPKC are associated with the endogenous mechanism of protection referred to as ischemic preconditioning (IPC). Existing modulators of PKCs, in particular of εPKC, such as ψεReceptor for Activated C-Kinase (ψεRACK) and Resveratrol, have been proposed as a potential therapeutic strategy for cerebrovascular and cognitive diseases. PKCs change in expression during aging, which likely suggests their association with IPC-induced reduction against ischemia and increase of neuronal loss occurring in senescent brain. This review describes the link between PKCs and cerebrovascular and cognitive disorders, and proposes PKCs modulators as innovative candidates for their treatment. We report original data showing εPKC reduction in levels and activity in the hippocampus of old compared to young rats and a reduction in the levels of δPKC and γPKC in old hippocampus, without a change in their activity. These data, integrated with other findings discussed in this review, demonstrate that PKCs modulators may have potential to restore age-related reduction of endogenous mechanisms of protection against neurodegeneration.
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Affiliation(s)
- Donatella Pastore
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Francesca Pacifici
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Kunjan R Dave
- Department of Neurology, The Evelyn McKnight Brain Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Raffaele Palmirotta
- Department of Biomedical Sciences and Human Oncology, University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Alfonso Bellia
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
- Policlinico Tor Vergata Foundation, University Hospital, 00133 Rome, Italy
| | - Guido Pasquantonio
- Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Fiorella Guadagni
- Department of Human Sciences and Quality of Life Promotion, San Raffaele Roma Open University, 00166 Rome, Italy
| | - Giulia Donadel
- Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Nicola Di Daniele
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
- Policlinico Tor Vergata Foundation, University Hospital, 00133 Rome, Italy
| | - Pasquale Abete
- Department of Translational Medical Sciences, University of Naples, Federico II, 80138 Naples, Italy
| | - Davide Lauro
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
- Policlinico Tor Vergata Foundation, University Hospital, 00133 Rome, Italy
| | - Tatjana Rundek
- Department of Neurology, The Evelyn McKnight Brain Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Miguel A Perez-Pinzon
- Department of Neurology, The Evelyn McKnight Brain Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - David Della-Morte
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy.
- Department of Neurology, The Evelyn McKnight Brain Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, USA.
- Department of Human Sciences and Quality of Life Promotion, San Raffaele Roma Open University, 00166 Rome, Italy.
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Zhang N, Zhu H, Han S, Sui L, Li J. cPKCγ alleviates ischemic injury through modulating synapsin Ia/b phosphorylation in neurons of mice. Brain Res Bull 2018; 142:156-162. [PMID: 30016727 DOI: 10.1016/j.brainresbull.2018.07.005] [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: 04/20/2018] [Revised: 07/02/2018] [Accepted: 07/12/2018] [Indexed: 01/13/2023]
Abstract
Conventional protein kinase C (cPKC)γ and synapsin Ia/b have been implicated in the development of ischemic stroke, but their relationships and functions are unclear. In the present study, the oxygen-glucose deprivation (OGD)-induced ischemic insult in primary cultured cortical neurons in vitro and middle cerebral artery occlusion (MCAO)-induced ischemic stroke model in vivo were used to elucidate the function of cPKCγ and its modulation on synapsin Ia/b phosphorylation in ischemic stroke. We found that cPKCγ knockout significantly increased the infarct volume of mice after 1 h MCAO/72 h reperfusion by using triphenyltetrazolium chloride (TTC) staining. In the primarily cultured cortical neurons, cPKCγ knockout also aggravated the OGD-induced cell death and morphological damage of neurites, while cPKCγ restoration could alleviate the ischemic injury. Among the five phosphorylation sites of synapsin Ia/b, only the phosphorylation levels of Ser549 and 553 could be modulated by cPKCγ in neurons following 0.5 h OGD/24 h reoxygenation. In addition, we found that cPKCγ and synapsin Ia/b could be reciprocally co-immunoprecipitated in the cerebral cortex of MCAO mice. Taken together, we proposed that cPKCγ alleviates ischemic injury through modulating Ser549/553- synapsin Ia/b phosphorylation in neurons of mice.
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Affiliation(s)
- Nan Zhang
- Department of Human Anatomy, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, PR China; Chinese Medical Association Publishing House, Beijing 100710, PR China
| | - Hongyi Zhu
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, PR China
| | - Song Han
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, PR China
| | - Leiming Sui
- Core Facility Center, Capital Medical University, Beijing 100069, PR China
| | - Junfa Li
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, PR China.
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Morphine Preconditioning Downregulates MicroRNA-134 Expression Against Oxygen-Glucose Deprivation Injuries in Cultured Neurons of Mice. J Neurosurg Anesthesiol 2017; 28:195-202. [PMID: 26372418 DOI: 10.1097/ana.0000000000000204] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Brain protection by narcotics such as morphine is clinically relevant due to the extensive use of narcotics in the perioperative period. Morphine preconditioning induces neuroprotection in neurons, but it remains uncertain whether microRNA-134 (miR-134) is involved in morphine preconditioning against oxygen-glucose deprivation-induced injuries in primary cortical neurons of mice. The present study examined this issue. MATERIALS AND METHODS After cortical neurons of mice were cultured in vitro for 6 days, the neurons were transfected by respective virus vector, such as lentiviral vector (LV)-miR-control-GFP, LV-pre-miR-134-GFP, LV-pre-miR-134-inhibitor-GFP for 24 hours; after being normally cultured for 3 days again, morphine preconditioning was performed by incubating the transfected primary neurons with morphine (3 μM) for 1 hour, and then neuronal cells were exposed to oxygen-glucose deprivation (OGD) for 1 hour and oxygen-glucose recovery for 12 hours. The neuronal cells survival rate and the amount of apoptotic neurons were determined by MTT assay or TUNEL staining at designated time; and the expression levels of miR-134 were detected using real-time reverse transcription polymerase chain reaction at the same time. RESULTS The neuronal cell survival rate was significantly higher, and the amount of apoptotic neurons was significantly decreased in neurons preconditioned with morphine before OGD than that of OGD alone. The neuroprotection induced by morphine preconditioning was partially blocked by upregulating miR-134 expression, and was enhanced by downregulating miR-134 expression. The expression of miR-134 was significantly decreased in morphine-preconditioned neurons alone without transfection. CONCLUSIONS By downregulating miR-134 expression, morphine preconditioning protects primary cortical neurons of mice against injuries induced by OGD.
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Zhang D, Han S, Wang S, Luo Y, Zhao L, Li J. cPKCγ-mediated down-regulation of UCHL1 alleviates ischaemic neuronal injuries by decreasing autophagy via ERK-mTOR pathway. J Cell Mol Med 2017; 21:3641-3657. [PMID: 28726275 PMCID: PMC5706506 DOI: 10.1111/jcmm.13275] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 05/14/2017] [Indexed: 02/06/2023] Open
Abstract
Stroke is one of the leading causes of death in the world, but its underlying mechanisms remain unclear. Both conventional protein kinase C (cPKC)γ and ubiquitin C-terminal hydrolase L1 (UCHL1) are neuron-specific proteins. In the models of 1-hr middle cerebral artery occlusion (MCAO)/24-hr reperfusion in mice and 1-hr oxygen-glucose deprivation (OGD)/24-hr reoxygenation in cortical neurons, we found that cPKCγ gene knockout remarkably aggravated ischaemic injuries and simultaneously increased the levels of cleaved (Cl)-caspase-3 and LC3-I proteolysis product LC3-II, and the ratio of TUNEL-positive cells to total neurons. Moreover, cPKCγ gene knockout could increase UCHL1 protein expression via elevating its mRNA level regulated by the nuclear factor κB inhibitor alpha (IκB-α)/nuclear factor κB (NF-κB) pathway in cortical neurons. Both inhibitor and shRNA of UCHL1 significantly reduced the ratio of LC3-II/total LC3, which contributed to neuronal survival after ischaemic stroke, but did not alter the level of Cl-caspase-3. In addition, UCHL1 shRNA reversed the effect of cPKCγ on the phosphorylation levels of mTOR and ERK rather than that of AMPK and GSK-3β. In conclusion, our results suggest that cPKCγ activation alleviates ischaemic injuries of mice and cortical neurons through inhibiting UCHL1 expression, which may negatively regulate autophagy through ERK-mTOR pathway.
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Affiliation(s)
- Dan Zhang
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Song Han
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Shizun Wang
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Yanlin Luo
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Li Zhao
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Junfa Li
- Department of Neurobiology and Center of Stroke, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
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Gui X, Cui X, Wei H, Feng G, Zhang X, He Y, Li J, Li T. cPKCγ membrane translocation is involved in herkinorin‑induced neuroprotection against cerebral ischemia/reperfusion injury in mice. Mol Med Rep 2016; 15:221-227. [PMID: 27922694 PMCID: PMC5355757 DOI: 10.3892/mmr.2016.5995] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 11/01/2016] [Indexed: 01/09/2023] Open
Abstract
Herkinorin is an opiate analgesic with limited adverse effects, functioning as a primary selective atypical opioid µ agonist. The present study aimed to identify whether herkinorin has a positive effect on ischemic/reperfusion (I/R) injury. Adult male C57BL/6 mice were randomly divided into five groups: i) Naïve, ii) sham, iii) I/R, iv) I/R with dimethyl sulfoxide (I/R+D) and v) I/R with herkinorin (I/R+H). The I/R injury model was induced by occluding the middle cerebral artery for 1 h followed by 24 h or 7 days of reperfusion. Neurobehavioral scores and sensorimotor functions were examined 24 h and 7 days following reperfusion. In addition, infarct volumes were examined at these time points using a 2,3,5‑triphenyltetrazolium chloride assay. Herkinorin treatment improved neurobehavioral and sensorimotor functional recovery from I/R‑induced brain injury. There was a significant decrease in infarct volume in the I/R+H group at 24 h or 7 days following reperfusion compared with the I/R and I/R+D groups. Western blotting suggested that the decrease in conventional protein kinase C γ (cPKCγ) membrane translocation in the peri‑infarct region may be attenuated by herkinorin pretreatment. These results indicated that herkinorin may be beneficial in I/R‑induced mouse brain injury, and this may be attributed to the membrane translocation of cPKCγ following activation.
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Affiliation(s)
- Xiaochen Gui
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
| | - Xu Cui
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
| | - Haiping Wei
- Department of Neurobiology, Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, P.R. China
| | - Guang Feng
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
| | - Xuezheng Zhang
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
| | - Yongjin He
- Department of Anesthesiology, Tianjin Hospital, Tianjin 300211, P.R. China
| | - Junfa Li
- Department of Neurobiology, Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, P.R. China
| | - Tianzuo Li
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
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12
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Maino B, D'Agata V, Severini C, Ciotti MT, Calissano P, Copani A, Chang YC, DeLisi C, Cavallaro S. Igf1 and Pacap rescue cerebellar granule neurons from apoptosis via a common transcriptional program. Cell Death Discov 2015; 1. [PMID: 26941962 PMCID: PMC4773033 DOI: 10.1038/cddiscovery.2015.29] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A shift of the delicate balance between apoptosis and survival-inducing signals determines the fate of neurons during the development of the central nervous system and its homeostasis throughout adulthood. Both pathways, promoting or protecting from apoptosis, trigger a transcriptional program. We conducted whole-genome expression profiling to decipher the transcriptional regulatory elements controlling the apoptotic/survival switch in cerebellar granule neurons following the induction of apoptosis by serum and potassium deprivation or their rescue by either insulin-like growth factor-1 (Igf1) or pituitary adenylyl cyclase-activating polypeptide (Pacap). Although depending on different upstream signaling pathways, the survival effects of Igf1 and Pacap converged into common transcriptional cascades, thus suggesting the existence of a general transcriptional program underlying neuronal survival.
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Affiliation(s)
- Barbara Maino
- Institute of Neurological Sciences, Italian National Research Council, 95126 Catania, Italy
| | - Velia D'Agata
- Department of Biomedical and Biotechnological Sciences, Section of Human Anatomy and Histology, University of Catania, 95123 Catania, Italy
| | - Cinzia Severini
- Institute of Neurobiology and Molecular Medicine, Italian National Research Council, 00143 Roma, Italy
| | | | | | - Agata Copani
- Department of Drug Sciences, University of Catania, 95125 Catania, Italy
| | - Yi-Chien Chang
- Center for Advanced Genomic Technology, Boston University, Boston, MA 02215, USA
| | - Charles DeLisi
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Sebastiano Cavallaro
- Institute of Neurological Sciences, Italian National Research Council, 95126 Catania, Italy
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Kleczkowska P, Kawalec M, Bujalska-Zadrozny M, Filip M, Zablocka B, Lipkowski AW. Effects of the Hybridization of Opioid and Neurotensin Pharmacophores on Cell Survival in Rat Organotypic Hippocampal Slice Cultures. Neurotox Res 2015; 28:352-60. [PMID: 26286504 DOI: 10.1007/s12640-015-9553-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 08/04/2015] [Accepted: 08/04/2015] [Indexed: 10/23/2022]
Abstract
Several neurotransmitter and neuromodulatory systems can control physiological glutamatergic activity. For example, opioid receptor ligands were shown to partially inhibit N-methyl-D-aspartic acid (NMDA) receptor-dependent glutamatergic excitotoxicity. Also, the endogenous tridecapeptide neurotensin (NT) was found to modulate excessive glutamate release and glutamate receptor activity in neurons. Alternatively to the one target-one drug approach, it has been well documented that hybrid compounds encompassing two pharmacophores in one molecular scaffold can represent more potent drugs. Moreover, such structures with dual activity can potentially enable a reduction of undesirable side effects and/or improved bioavailability. Herein, we describe the neuroprotective potential of an opioid-NT hybrid peptide (PK20), which was recently designed and synthesized within our group. The protective properties of PK20, assessed in an in vitro model of excitotoxic injury in organotypic hippocampal slice cultures subjected to NMDA, were compared to the effects caused by NT. Our results indicate that PK20 is a potent anti-neurodegenerative agent. Moreover, co-administered with NMDA, PK20 (25-100 ng/ml) dose-dependently reduced hippocampal cell death, determined by a decrease in the propidium iodide signal. We also report for the first time the significant NT-induced neuroprotective effect, as its application (50-100 ng/ml) to hippocampal slice cultures protected CA1 damage against neurotoxicity caused by NMDA.
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Affiliation(s)
- Patrycja Kleczkowska
- Department of Neuropeptides, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego Str., 02-106, Warsaw, Poland. .,Department of Pharmacodynamics, Centre for Preclinical Research and Technology, CEPT, Medical University of Warsaw, 1B Banacha Str., 02-106, Warsaw, Poland.
| | - Maria Kawalec
- Molecular Biology Unit, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego Str., 02-106, Warsaw, Poland
| | - Magdalena Bujalska-Zadrozny
- Department of Pharmacodynamics, Centre for Preclinical Research and Technology, CEPT, Medical University of Warsaw, 1B Banacha Str., 02-106, Warsaw, Poland
| | - Małgorzata Filip
- Department of Toxicology, Faculty of Pharmacy, Jagiellonian University, College of Medicum, 9 Medyczna Str., 30-688, Kraków, Poland.,Laboratory of Drug Addiction Pharmacology, Department of Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Str., 31-343, Kraków, Poland
| | - Barbara Zablocka
- Molecular Biology Unit, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego Str., 02-106, Warsaw, Poland
| | - Andrzej W Lipkowski
- Department of Neuropeptides, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego Str., 02-106, Warsaw, Poland
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Stetler RA, Leak RK, Gan Y, Li P, Zhang F, Hu X, Jing Z, Chen J, Zigmond MJ, Gao Y. Preconditioning provides neuroprotection in models of CNS disease: paradigms and clinical significance. Prog Neurobiol 2014; 114:58-83. [PMID: 24389580 PMCID: PMC3937258 DOI: 10.1016/j.pneurobio.2013.11.005] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 11/18/2013] [Accepted: 11/18/2013] [Indexed: 12/14/2022]
Abstract
Preconditioning is a phenomenon in which brief episodes of a sublethal insult induce robust protection against subsequent lethal injuries. Preconditioning has been observed in multiple organisms and can occur in the brain as well as other tissues. Extensive animal studies suggest that the brain can be preconditioned to resist acute injuries, such as ischemic stroke, neonatal hypoxia/ischemia, surgical brain injury, trauma, and agents that are used in models of neurodegenerative diseases, such as Parkinson's disease and Alzheimer's disease. Effective preconditioning stimuli are numerous and diverse, ranging from transient ischemia, hypoxia, hyperbaric oxygen, hypothermia and hyperthermia, to exposure to neurotoxins and pharmacological agents. The phenomenon of "cross-tolerance," in which a sublethal stress protects against a different type of injury, suggests that different preconditioning stimuli may confer protection against a wide range of injuries. Research conducted over the past few decades indicates that brain preconditioning is complex, involving multiple effectors such as metabolic inhibition, activation of extra- and intracellular defense mechanisms, a shift in the neuronal excitatory/inhibitory balance, and reduction in inflammatory sequelae. An improved understanding of brain preconditioning should help us identify innovative therapeutic strategies that prevent or at least reduce neuronal damage in susceptible patients. In this review, we focus on the experimental evidence of preconditioning in the brain and systematically survey the models used to develop paradigms for neuroprotection, and then discuss the clinical potential of brain preconditioning.
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Affiliation(s)
- R Anne Stetler
- State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University, Shanghai Medical College, Shanghai 200032, China; Department of Neurology and Center of Cerebrovascular Disease Research, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA; Geriatric Research, Educational and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA 15261, USA
| | - Rehana K Leak
- Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University, Pittsburgh, PA 15282, USA
| | - Yu Gan
- State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University, Shanghai Medical College, Shanghai 200032, China; Department of Neurology and Center of Cerebrovascular Disease Research, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA
| | - Peiying Li
- State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University, Shanghai Medical College, Shanghai 200032, China; Department of Neurology and Center of Cerebrovascular Disease Research, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA
| | - Feng Zhang
- State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University, Shanghai Medical College, Shanghai 200032, China; Department of Neurology and Center of Cerebrovascular Disease Research, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA; Geriatric Research, Educational and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA 15261, USA
| | - Xiaoming Hu
- Department of Neurology and Center of Cerebrovascular Disease Research, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA; Geriatric Research, Educational and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA 15261, USA
| | - Zheng Jing
- Department of Neurology and Center of Cerebrovascular Disease Research, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA; Geriatric Research, Educational and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA 15261, USA
| | - Jun Chen
- State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University, Shanghai Medical College, Shanghai 200032, China; Department of Neurology and Center of Cerebrovascular Disease Research, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA; Geriatric Research, Educational and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA 15261, USA
| | - Michael J Zigmond
- State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University, Shanghai Medical College, Shanghai 200032, China; Department of Neurology and Center of Cerebrovascular Disease Research, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA
| | - Yanqin Gao
- State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University, Shanghai Medical College, Shanghai 200032, China.
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Menard C, Bastianetto S, Quirion R. Neuroprotective effects of resveratrol and epigallocatechin gallate polyphenols are mediated by the activation of protein kinase C gamma. Front Cell Neurosci 2013; 7:281. [PMID: 24421757 PMCID: PMC3872731 DOI: 10.3389/fncel.2013.00281] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Accepted: 12/15/2013] [Indexed: 01/08/2023] Open
Abstract
Polyphenols such as epigallocatechin gallate (EGCG) and resveratrol have received a great deal of attention because they may contribute to the purported neuroprotective action of the regular consumption of green tea and red wine. Many studies, including those published by our group, suggest that this protective action includes their abilities to prevent the neurotoxic effects of beta-amyloid, a protein whose accumulation likely plays a pivotal role in Alzheimer's disease. Moreover, the scavenging activities of polyphenols on reactive oxygen species and their inhibitory action of cyclooxygenase likely explain, at least in part, their antioxidant and anti-inflammatory activities. Besides these well-documented properties, the modulatory action of these polyphenols on intracellular signaling pathways related to cell death/survival (e.g., protein kinase C, PKC) has yet to be investigated in detail. Using rat hippocampal neuronal cells, we aimed to investigate here the effects of EGCG and resveratrol on cell death induced by GF 109203X, a selective inhibitor of PKC. The MTT/resazurin and spectrin assays indicated that EGCG and resveratrol protected against GF 109203X-induced cell death and cytoskeleton degeneration, with a maximal effect at 1 and 3 μM, respectively. Moreover, immunofluorescence data revealed that cells treated with these polyphenols increased PKC gamma (γ) activation and promoted neuronal interconnections. Finally, we found that the protective effects of both polyphenols on the cytoskeleton and synaptic plasticity were mediated by the PKCγ subunit. Taken together, the results suggest that PKC, and more specifically its γ subunit, plays a critical role in the protective action of EGCG and resveratrol on neuronal integrity.
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Affiliation(s)
- Caroline Menard
- Laboratory of Neuroendocrinology of Aging, Centre Hospitalier de l'Université de Montréal Research Center Montreal, QC, Canada ; Department of Medicine, University of Montreal Montreal, QC, Canada ; Douglas Mental Health University Institute, McGill University Montreal, QC, Canada ; Department of Psychiatry, McGill University Montreal, QC, Canada
| | - Stéphane Bastianetto
- Douglas Mental Health University Institute, McGill University Montreal, QC, Canada
| | - Rémi Quirion
- Douglas Mental Health University Institute, McGill University Montreal, QC, Canada ; Department of Psychiatry, McGill University Montreal, QC, Canada
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Wang Y, Wu J, Guo R, Zhao Y, Wang Y, Zhang M, Chen Z, Wu A, Yue Y. Surgical incision induces phosphorylation of AMPA receptor GluR1 subunits at Serine-831 sites and GluR1 trafficking in spinal cord dorsal horn via a protein kinase Cγ-dependent mechanism. Neuroscience 2013; 240:361-70. [PMID: 23470774 DOI: 10.1016/j.neuroscience.2013.02.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 02/14/2013] [Accepted: 02/25/2013] [Indexed: 01/07/2023]
Abstract
Spinal α-amino-3-hydroxy-5-methy-4-isoxazole propionate (AMPA) receptor plays an important role in acute pain induced by surgical tissue injuries. Our previous study has shown that the enhanced phosphorylation of AMPA receptor GluR1 subunits at Serine-831 sites by protein kinase C (PKC) in the spinal cord dorsal horn is involved in post-surgical pain hypersensitivity. However, which isoforms of PKC are responsible for the phosphorylation of AMPA receptor GluR1 subunits at Serine-831 sites remains to be established. In the present study, using an animal model of postoperative pain, we found that surgical tissue injuries enhanced the membrane translocation level of PKCγ, but not PKCα, βI, and βII, and induced the trafficking of GluR1, but not GluR2 into neuronal plasma membrane. Intrathecal (i.t.) pretreatment of small interfering RNA targeting PKCγ to reduce the PKCγ expression in the spinal cord significantly attenuated the pain hypersensitivity and inhibited the phosphorylation of AMPA receptor GluR1 subunits at Serine-831 sites as well as GluR1 membrane trafficking. Our study indicates that the surgical incision-induced phosphorylation of AMPA receptor GluR1 subunits at Serine-831 sites and GluR1 trafficking are regulated by a PKCγ-dependent mechanism.
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Affiliation(s)
- Y Wang
- Department of Anesthesiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China.
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17
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Yakovlev AA, Peregud DI, Panchenko LF, Gulyaeva NV. Involvement of brain intracellular proteolytic systems in the effects of opiates: Caspases. NEUROCHEM J+ 2011. [DOI: 10.1134/s1819712411040192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Yang L, Shah K, Wang H, Karamyan VT, Abbruscato TJ. Characterization of neuroprotective effects of biphalin, an opioid receptor agonist, in a model of focal brain ischemia. J Pharmacol Exp Ther 2011; 339:499-508. [PMID: 21856861 DOI: 10.1124/jpet.111.184127] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Approximately 795,000 people experience a new or recurrent stroke in the United States annually. The purpose of this study was to assess the protective effect of a nonselective opioid receptor agonist, biphalin, in brain edema and infarct damage by using both in vitro and in vivo models of stroke. In an in vivo model of ischemia, biphalin significantly decreased edema (66.6 and 58.3%) and infarct (52.2 and 56.4%) ratios in mouse transient (60-min occlusion/24-h reperfusion) and permanent (6 h) middle cerebral artery occlusion models, respectively. Biphalin administration also showed decreased neurodegeneration in hippocampal, cortical, and striatal brain tissue after ischemia, evidenced by reduced Fluoro-Jade C staining. In addition, biphalin improved neurological function after stroke injury evidenced by neurological score and locomotor activity evaluation. Biphalin significantly decreased penumbral expression of Na(+), K(+), 2Cl(-) cotransporter (NKCC) and the translocation of the conventional isoforms of protein kinase C (PKC). It also reversed the activation of PKC-induced cell volume increase during ischemia in primary neuronal cell cultures exposed to 1 h of oxygen glucose deprivation. These data suggest that opioid receptor activation provides neuroprotection during stroke, and a possible explanation of this mechanism could be the inhibition of NKCC function via the regulation of PKC-dependent cell signaling.
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Affiliation(s)
- Li Yang
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, 1300 S. Coulter, Amarillo, TX 79016, USA
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Neuroprotective potential of biphalin, multireceptor opioid peptide, against excitotoxic injury in hippocampal organotypic culture. Neurochem Res 2011; 36:2091-5. [PMID: 21842273 PMCID: PMC3183243 DOI: 10.1007/s11064-011-0568-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 06/09/2011] [Accepted: 06/10/2011] [Indexed: 10/26/2022]
Abstract
UNLABELLED Biphalin is a dimeric opioid peptide that exhibits affinity for three types of opioid receptors (MOP, DOP and KOP). Biphalin is undergoing intensive preclinical study. It was recognized that activation of δ-opioid receptor elicits neuroprotection against brain hypoxia and ischemia. We compare the effect of biphalin and morphine and the inhibition of opioid receptors by naltrexone on survival of neurons in rat organotypic hippocampal cultures challenged with NMDA. FINDINGS (1) 0.025-0.1 μM biphalin reduces NMDA-induced neuronal damage; (2) biphalin neuroprotection is abolished by naltrexone; (3) reduced number of dead cells is shown even if biphalin is applied with delay after NMDA challenge.
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Zhang N, Yin Y, Han S, Jiang J, Yang W, Bu X, Li J. Hypoxic preconditioning induced neuroprotection against cerebral ischemic injuries and its cPKCγ-mediated molecular mechanism. Neurochem Int 2011; 58:684-92. [DOI: 10.1016/j.neuint.2011.02.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
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Sivaswamy S, Neafsey EJ, Collins MA. Neuroprotective preconditioning of rat brain cultures with ethanol: potential transduction by PKC isoforms and focal adhesion kinase upstream of increases in effector heat shock proteins. Eur J Neurosci 2010; 32:1800-12. [DOI: 10.1111/j.1460-9568.2010.07451.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Differential Roles of Phosphorylated AMPA Receptor GluR1 Subunits at Serine-831 and Serine-845 Sites in Spinal Cord Dorsal Horn in a Rat Model of Post-Operative Pain. Neurochem Res 2010; 36:170-6. [DOI: 10.1007/s11064-010-0288-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2010] [Indexed: 11/24/2022]
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Abstract
This paper is the 31st consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2008 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); and immunological responses (Section 17).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, 65-30 Kissena Blvd, Flushing, NY 11367, United States.
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Systemic Lidocaine Inhibits Remifentanil-induced Hyperalgesia via the Inhibition of cPKCgamma Membrane Translocation in Spinal Dorsal Horn of Rats. J Neurosurg Anesthesiol 2009; 21:318-25. [DOI: 10.1097/ana.0b013e3181abbde5] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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