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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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Different changes in pre- and postsynaptic components in the hippocampal CA1 subfield after transient global cerebral ischemia. Brain Struct Funct 2021; 227:345-360. [PMID: 34626230 DOI: 10.1007/s00429-021-02404-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 09/29/2021] [Indexed: 10/20/2022]
Abstract
To date, ischemia-induced damage to dendritic spines has attracted considerable attention, while the possible effects of ischemia on presynaptic components has received relatively less attention. To further examine ischemia-induced changes in pre- and postsynaptic specializations in the hippocampal CA1 subfield, we modeled global cerebral ischemia with two-stage 4-vessel-occlusion in rats, and found that three postsynaptic markers, microtubule-associated protein 2 (MAP2), postsynaptic density protein 95 (PSD95), and filamentous F-actin (F-actin), were all substantially decreased in the CA1 subfield after ischemia/reperfusion (I/R). Although no significant change was detected in synapsin I, a presynaptic marker, in the CA1 subfield at the protein level, confocal microscopy revealed that the number and size of synapsin I puncta were significantly changed in the CA1 stratum radiatum after I/R. The size of synapsin I puncta became slightly, but significantly reduced on Day 1.5 after I/R. From Days 2 to 7 after I/R, the number of synapsin I puncta became moderately decreased, while the size of synapsin I puncta was significantly increased. Interestingly, some enlarged puncta of synapsin I were observed in close proximity to the dendritic shafts of CA1 pyramidal cells. Due to the more substantial decrease in the number of F-actin puncta, the ratio of synapsin I/F-actin puncta was significantly increased after I/R. The decrease in synapsin I puncta size in the early stage of I/R may be the result of excessive neurotransmitter release due to I/R-induced hyperexcitability in CA3 pyramidal cells, while the increase in synapsin I puncta in the later stage of I/R may reflect a disability of synaptic vesicle release due to the loss of postsynaptic contacts.
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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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