1
|
Gauba E, Sui S, Tian J, Driskill C, Jia K, Yu C, Rughwani T, Wang Q, Kroener S, Guo L, Du H. Modulation of OSCP mitigates mitochondrial and synaptic deficits in a mouse model of Alzheimer's pathology. Neurobiol Aging 2020; 98:63-77. [PMID: 33254080 DOI: 10.1016/j.neurobiolaging.2020.09.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/09/2020] [Accepted: 09/21/2020] [Indexed: 01/22/2023]
Abstract
Synaptic failure underlies cognitive impairment in Alzheimer's disease (AD). Cumulative evidence suggests a strong link between mitochondrial dysfunction and synaptic deficits in AD. We previously found that oligomycin-sensitivity-conferring protein (OSCP) dysfunction produces pronounced neuronal mitochondrial defects in AD brains and a mouse model of AD pathology (5xFAD mice). Here, we prevented OSCP dysfunction by overexpressing OSCP in 5xFAD mouse neurons in vivo (Thy-1 OSCP/5xFAD mice). This approach protected OSCP expression and reduced interaction of amyloid-beta (Aβ) with membrane-bound OSCP. OSCP overexpression also alleviated F1Fo ATP synthase deregulation and preserved mitochondrial function. Moreover, OSCP modulation conferred resistance to Aβ-mediated defects in axonal mitochondrial dynamics and motility. Consistent with preserved neuronal mitochondrial function, OSCP overexpression ameliorated synaptic injury in 5xFAD mice as demonstrated by preserved synaptic density, reduced complement-dependent synapse elimination, and improved synaptic transmission, leading to preserved spatial learning and memory. Taken together, our findings show the consequences of OSCP dysfunction in the development of synaptic stress in AD-related conditions and implicate OSCP modulation as a potential therapeutic strategy.
Collapse
Affiliation(s)
- Esha Gauba
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Shaomei Sui
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Jing Tian
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Christopher Driskill
- School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Kun Jia
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Chunxiao Yu
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Tripta Rughwani
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Qi Wang
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Sven Kroener
- School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Lan Guo
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA; Department of Pharmacology & Toxicology, The University of Kansas, Lawrence, KS, USA; Higuchi Biosciences Center, The University of Kansas, Lawrence, KS, USA.
| | - Heng Du
- Department of Biological Sciences, University of Texas at Dallas, Richardson, TX, USA; Department of Pharmacology & Toxicology, The University of Kansas, Lawrence, KS, USA; Higuchi Biosciences Center, The University of Kansas, Lawrence, KS, USA.
| |
Collapse
|
2
|
Li C, Yu TY, Zhang Y, Wei LP, Dong SA, Shi J, Du SH, Yu JB. Electroacupuncture Improves Cognition in Rats With Sepsis-Associated Encephalopathy. J Surg Res 2020; 256:258-266. [PMID: 32712439 DOI: 10.1016/j.jss.2020.06.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 06/04/2020] [Accepted: 06/16/2020] [Indexed: 01/02/2023]
Abstract
BACKGROUND Sepsis-associated encephalopathy (SAE) is a common complication of sepsis. Although sepsis is effectively managed with the administration of antibiotics and source control, which may include surgical intervention, SAE usually leads to prolonged cognitive dysfunction affecting the quality of life of the patients. In this study, we investigated the possible effect of electroacupuncture (EA) on cognition in a model of SAE induced by cecal ligation and puncture (CLP). MATERIALS AND METHODS The rats were randomly divided into four groups: the control group, the CLP group, the CLP with EA treatment group (CLP + EA), and the CLP with sham EA treatment group (CLP + sham EA). EA at DU20, LI11, and ST36 or sham EA was performed 30 min daily for 10 consecutive days starting from 2 days before CLP. Then cognitive function was examined by the Morris water maze test. On day 14 after CLP surgery, the synaptic injury, neuron loss, and oxidative stress were studied. RESULTS Rats with EA treatment showed improved survival rate, spatial learning, and memory abilities. The dendritic spine density, the synaptic proteins, and the hippocampal neuron number were also increased after EA treatment. Furthermore, EA suppressed oxidative stress through regulating the level of malondialdehyde and superoxide dismutase and enhanced the expression of antioxidant nuclear factor erythroid-2-related factor-2 and hemeoxygenase-1. But sham EA did not have the same effect. CONCLUSIONS EA may protect against SAE-induced cognitive dysfunction by inhibiting synaptic injury, neuronal loss, and oxidative stress, and the nuclear factor erythroid-2-related factor-2/hemeoxygenase-1 signaling pathway may be involved in this effect.
Collapse
Affiliation(s)
- Cui Li
- Department of Anesthesiology, Tianjin Medical University NanKai Hospital, Tianjin, China; Department of Anesthesiology, Tianjin NanKai Hospital, Tianjin, China
| | - Tian-Yu Yu
- Department of Anesthesiology, Tianjin Medical University NanKai Hospital, Tianjin, China
| | - Yuan Zhang
- Department of Anesthesiology, Tianjin NanKai Hospital, Tianjin, China
| | - Liang-Peng Wei
- Department of Anesthesiology, Tianjin Medical University NanKai Hospital, Tianjin, China
| | - Shu-An Dong
- Department of Anesthesiology, Tianjin NanKai Hospital, Tianjin, China
| | - Jia Shi
- Department of Anesthesiology, Tianjin NanKai Hospital, Tianjin, China
| | - Shi-Han Du
- Department of Anesthesiology, Tianjin Medical University NanKai Hospital, Tianjin, China
| | - Jian-Bo Yu
- Department of Anesthesiology, Tianjin NanKai Hospital, Tianjin, China.
| |
Collapse
|
3
|
Chen M, Li B, Sang N. Particulate matter (PM 2.5) exposure season-dependently induces neuronal apoptosis and synaptic injuries. J Environ Sci (China) 2017; 54:336-345. [PMID: 28391945 DOI: 10.1016/j.jes.2016.10.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 08/24/2016] [Accepted: 10/08/2016] [Indexed: 06/07/2023]
Abstract
Epidemiological studies have shown that particulate matter 2.5 (PM2.5) not only increases the incidence of cardiopulmonary illnesses but also relates to the development of neurodegenerative diseases. Considering that PM2.5 is highly heterogeneous with regional disparity and seasonal variation, we investigated whether PM2.5 exposure induced neuronal apoptosis and synaptic injuries in a season-dependent manner. The results indicated that PM2.5 altered the expression of apoptosis-related proteins (mainly bax and bcl-2), activated caspase-3 and caused neuronal apoptosis. Additionally, PM2.5 decreased the levels of synaptic structural protein postsynaptic density (PSD-95) and synaptic functional protein N-methyl-D-aspartate (NMDA) receptor subunit (NR2B) expression. These effects occurred in a season-dependent manner, and PM2.5 collected from the winter showed the strongest changes. Furthermore, the effect was coupled with the inhibition of phosphorylated extracellular signal-regulated kinase 1/2 (p-ERK1/2) and phosphorylated cAMP-response element binding protein (p-CREB). Based on the findings, we analyzed the correlations between the chemical composition of PM2.5 samples and the biological effects, and confirmed that winter PM2.5 played a major role in causing neuronal apoptosis and synaptic injuries among different season samples.
Collapse
Affiliation(s)
- Minjun Chen
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan 030006, China.
| | - Ben Li
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan 030006, China
| | - Nan Sang
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan 030006, China.
| |
Collapse
|
4
|
Zhang Y, Pan HY, Hu XM, Cao XL, Wang J, Min ZL, Xu SQ, Xiao W, Yuan Q, Li N, Cheng J, Zhao SQ, Hong X. The role of myocardin-related transcription factor-A in Aβ25-35 induced neuron apoptosis and synapse injury. Brain Res 2016; 1648:27-34. [PMID: 27387387 DOI: 10.1016/j.brainres.2016.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 06/19/2016] [Accepted: 07/04/2016] [Indexed: 11/18/2022]
Abstract
Myocardin-related transcription factor-A (MRTF-A) highly expressed in brain has been demonstrated to promote neuronal survival via regulating the transcription of related target genes as a powerful co-activator of serum response factor (SRF). However, the role of MRTF-A in Alzheimer's disease (AD) is still unclear. Here, we showed that MRTF-A was significantly downregulated in cortex of the Aβ25-35-induced AD rats, which played a key role in Aβ25-35 induced cerebral neuronal degeneration in vitro. Bilateral intracerebroventricular injection of Aβ25-35 caused significantly MRTF-A expression decline in cortex of rats, along with significant neuron apoptosis and plasticity damage. In vitro, transfection of MRTF-A into primary cultured cortical neurons prevented Aβ25-35 induced neuronal apoptosis and synapses injury. And luciferase reporter assay determined that MRTF-A could bind to and enhance the transactivity of the Mcl-1 (Myeloid cell leukemia-1) and Arc (activity-regulated cytoskeletal-associated protein) promoters by activating the key CArG box element. These data demonstrated that the decreasing of endogenous MRTF-A expression might contribute to the development of AD, whereas the upregulation MRTF-A in neurons could effectively reduce Aβ25-35 induced synapse injury and cell apoptosis. And the underlying mechanism might be partially due to MRTF-A-mediated the transcription and expression of Mcl-1 and Arc by triggering the CArG box.
Collapse
Affiliation(s)
- Ying Zhang
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Hong-Yan Pan
- Tianyou Hospital Affiliated to Wuhan University of Science and Technology, Wuhan 430064, PR China
| | - Xia-Min Hu
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China.
| | - Xiao-Lu Cao
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Jun Wang
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Zhen-Li Min
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Shi-Qiang Xu
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Wan Xiao
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Qiong Yuan
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Na Li
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Jing Cheng
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Shu-Qi Zhao
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| | - Xing Hong
- Department of Pharmacology, Medical College of Wuhan University of Science and Technology, Wuhan 430080, PR China
| |
Collapse
|
5
|
Cimini S, Sclip A, Mancini S, Colombo L, Messa M, Cagnotto A, Di Fede G, Tagliavini F, Salmona M, Borsello T. The cell-permeable Aβ1-6A2VTAT(D) peptide reverts synaptopathy induced by Aβ1-42wt. Neurobiol Dis 2016; 89:101-11. [PMID: 26721320 DOI: 10.1016/j.nbd.2015.12.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/17/2015] [Accepted: 12/21/2015] [Indexed: 02/07/2023] Open
Abstract
Alzheimer disease (AD) is the most prevalent form of dementia. Loss of hippocampal synapses is the first neurodegenerative event in AD. Synaptic loss has been associated with the accumulation in the brain parenchyma of soluble oligomeric forms of amyloid β peptide (Aβ1-42wt). Clinical observations have shown that a mutation in the APP protein (A673V) causes an early onset AD-type dementia in homozygous carriers while heterozygous carriers are unaffected. This mutation leads to the formation of mutated Aβ peptides (Aβ1-42A2V) in homozygous patients, while in heterozygous subjects both Aβ1-42wt and Aβ1-42A2V are present. To better understand the impact of the A673V mutation in AD, we analyzed the synaptotoxic effect of oligomers formed by aggregation of different Aβ peptides (Aβ1-42wt or Aβ1-42A2V) and the combination of the two Aβ1-42MIX (Aβ1-42wt and Aβ1-42A2V) in an in vitro model of synaptic injury. We showed that Aβ1-42A2V oligomers are more toxic than Aβ1-42wt oligomers in hippocampal neurons, confirming the results previously obtained in cell lines. Furthermore, we reported that oligomers obtained by the combination of both wild type and mutated peptides (Aβ1-42MIX) did not exert synaptic toxicity. We concluded that the combination of Aβ1-42wt and Aβ1-42A2V peptides hinders the toxicity of Aβ1-42A2V and counteracts the manifestation of synaptopathy in vitro. Finally we took advantage of this finding to generate a cell-permeable peptide for clinical application, by fusing the first six residues of the Aβ1-42A2V to the TAT cargo sequence (Aβ1-6A2VTAT(D)). Noteworthy, the treatment with Aβ1-6A2VTAT(D) confers neuroprotection against both in vitro and in vivo synaptopathy models. Therefore Aβ1-6A2VTAT(D) may represent an innovative therapeutic tool to prevent synaptic degeneration in AD.
Collapse
|
6
|
Nakamura T, Prikhodko OA, Pirie E, Nagar S, Akhtar MW, Oh CK, McKercher SR, Ambasudhan R, Okamoto SI, Lipton SA. Aberrant protein S-nitrosylation contributes to the pathophysiology of neurodegenerative diseases. Neurobiol Dis 2015; 84:99-108. [PMID: 25796565 DOI: 10.1016/j.nbd.2015.03.017] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/09/2015] [Accepted: 03/12/2015] [Indexed: 11/29/2022] Open
Abstract
Nitric oxide (NO) is a gasotransmitter that impacts fundamental aspects of neuronal function in large measure through S-nitrosylation, a redox reaction that occurs on regulatory cysteine thiol groups. For instance, S-nitrosylation regulates enzymatic activity of target proteins via inhibition of active site cysteine residues or via allosteric regulation of protein structure. During normal brain function, protein S-nitrosylation serves as an important cellular mechanism that modulates a diverse array of physiological processes, including transcriptional activity, synaptic plasticity, and neuronal survival. In contrast, emerging evidence suggests that aging and disease-linked environmental risk factors exacerbate nitrosative stress via excessive production of NO. Consequently, aberrant S-nitrosylation occurs and represents a common pathological feature that contributes to the onset and progression of multiple neurodegenerative disorders, including Alzheimer's, Parkinson's, and Huntington's diseases. In the current review, we highlight recent key findings on aberrant protein S-nitrosylation showing that this reaction triggers protein misfolding, mitochondrial dysfunction, transcriptional dysregulation, synaptic damage, and neuronal injury. Specifically, we discuss the pathological consequences of S-nitrosylated parkin, myocyte enhancer factor 2 (MEF2), dynamin-related protein 1 (Drp1), protein disulfide isomerase (PDI), X-linked inhibitor of apoptosis protein (XIAP), and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) under neurodegenerative conditions. We also speculate that intervention to prevent these aberrant S-nitrosylation events may produce novel therapeutic agents to combat neurodegenerative diseases.
Collapse
Affiliation(s)
- Tomohiro Nakamura
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Olga A Prikhodko
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA; Biomedical Sciences Graduate Program, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Elaine Pirie
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA; Biomedical Sciences Graduate Program, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Saumya Nagar
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA; Graduate School of Biomedical Sciences, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Mohd Waseem Akhtar
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Chang-Ki Oh
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Scott R McKercher
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Rajesh Ambasudhan
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Shu-ichi Okamoto
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Stuart A Lipton
- Neuroscience and Aging Research Center, Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA; Biomedical Sciences Graduate Program, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Department of Neurosciences, University of California San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093, USA.
| |
Collapse
|