1
|
Zhang Q, Singh P, Peng DW, Peng EY, Burns JM, Swerdlow RH, Suo WZ. Proactive M2 blockade prevents cognitive decline in GRK5-deficient APP transgenic mice via enhancing cholinergic neuronal resilience. J Biol Chem 2024; 300:107619. [PMID: 39098530 PMCID: PMC11400976 DOI: 10.1016/j.jbc.2024.107619] [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: 02/05/2024] [Revised: 07/09/2024] [Accepted: 07/14/2024] [Indexed: 08/06/2024] Open
Abstract
Alzheimer's disease (AD) poses an immense challenge in healthcare, lacking effective therapies. This study investigates the potential of anthranilamide derivative (AAD23), a selective M2 receptor antagonist, in proactively preventing cognitive impairments and cholinergic neuronal degeneration in G protein-coupled receptor kinase-5-deficient Swedish APP (GAP) mice. GAP mice manifest cognitive deficits by 7 months and develop senile plaques by 9 months. A 6-month AAD23 treatment was initiated at 5 months and stopped at 11 months before behavioral assessments without the treatment. AAD23-treated mice exhibited preserved cognitive abilities and improved cholinergic axonal health in the nucleus basalis of Meynert akin to wildtype mice. Conversely, vehicle-treated GAP mice displayed memory deficits and pronounced cholinergic axonal swellings in the nucleus basalis of Meynert. Notably, AAD23 treatment did not alter senile plaques and microgliosis. These findings highlight AAD23's efficacy in forestalling AD-related cognitive decline in G protein-coupled receptor kinase-5-deficient subjects, attributing its success to restoring cholinergic neuronal integrity and resilience, enhancing resistance against diverse degenerative insults.
Collapse
Affiliation(s)
- Qiang Zhang
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri, USA
| | - Prabhakar Singh
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri, USA
| | - David W Peng
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri, USA
| | - Evelyn Y Peng
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri, USA
| | - Jeffery M Burns
- Department of Neurology, University of Kansas Medical College, Kansas City, Kansas, USA; Department of Physiology, University of Kansas Medical College, Kansas City, Kansas, USA; The University of Kansas Alzheimer's Disease Center, Kansas City, Kansas, USA
| | - Russell H Swerdlow
- Department of Neurology, University of Kansas Medical College, Kansas City, Kansas, USA; Department of Physiology, University of Kansas Medical College, Kansas City, Kansas, USA; The University of Kansas Alzheimer's Disease Center, Kansas City, Kansas, USA
| | - William Z Suo
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri, USA; Department of Neurology, University of Kansas Medical College, Kansas City, Kansas, USA; Department of Physiology, University of Kansas Medical College, Kansas City, Kansas, USA; The University of Kansas Alzheimer's Disease Center, Kansas City, Kansas, USA.
| |
Collapse
|
2
|
Zhang Y, Zhang J, Wang J, Chen H, Ouyang L, Wang Y. Targeting GRK2 and GRK5 for treating chronic degenerative diseases: Advances and future perspectives. Eur J Med Chem 2022; 243:114668. [DOI: 10.1016/j.ejmech.2022.114668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 08/04/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022]
|
3
|
Zong B, Yu F, Zhang X, Zhao W, Sun P, Li S, Li L. Understanding How Physical Exercise Improves Alzheimer’s Disease: Cholinergic and Monoaminergic Systems. Front Aging Neurosci 2022; 14:869507. [PMID: 35663578 PMCID: PMC9158463 DOI: 10.3389/fnagi.2022.869507] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 04/14/2022] [Indexed: 01/11/2023] Open
Abstract
Alzheimer’s disease (AD) is an age-related neurodegenerative disorder, characterized by the accumulation of proteinaceous aggregates and neurofibrillary lesions composed of β-amyloid (Aβ) peptide and hyperphosphorylated microtubule-associated protein tau, respectively. It has long been known that dysregulation of cholinergic and monoaminergic (i.e., dopaminergic, serotoninergic, and noradrenergic) systems is involved in the pathogenesis of AD. Abnormalities in neuronal activity, neurotransmitter signaling input, and receptor function exaggerate Aβ deposition and tau hyperphosphorylation. Maintenance of normal neurotransmission is essential to halt AD progression. Most neurotransmitters and neurotransmitter-related drugs modulate the pathology of AD and improve cognitive function through G protein-coupled receptors (GPCRs). Exercise therapies provide an important alternative or adjunctive intervention for AD. Cumulative evidence indicates that exercise can prevent multiple pathological features found in AD and improve cognitive function through delaying the degeneration of cholinergic and monoaminergic neurons; increasing levels of acetylcholine, norepinephrine, serotonin, and dopamine; and modulating the activity of certain neurotransmitter-related GPCRs. Emerging insights into the mechanistic links among exercise, the neurotransmitter system, and AD highlight the potential of this intervention as a therapeutic approach for AD.
Collapse
Affiliation(s)
- Boyi Zong
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai, China
- College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Fengzhi Yu
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai, China
- College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Xiaoyou Zhang
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai, China
- College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Wenrui Zhao
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai, China
- College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Peng Sun
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai, China
- College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Shichang Li
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai, China
- College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Lin Li
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai, China
- College of Physical Education and Health, East China Normal University, Shanghai, China
- *Correspondence: Lin Li,
| |
Collapse
|
4
|
Suo WZ. GRK5 Deficiency Causes Mild Cognitive Impairment due to Alzheimer's Disease. J Alzheimers Dis 2021; 85:1399-1410. [PMID: 34958040 DOI: 10.3233/jad-215379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Prevention of Alzheimer's disease (AD) is a high priority mission while searching for a disease modifying therapy for AD, a devastating major public health crisis. Clinical observations have identified a prodromal stage of AD for which the patients have mild cognitive impairment (MCI) though do not yet meet AD diagnostic criteria. As an identifiable transitional stage before the onset of AD, MCI should become the high priority target for AD prevention, assuming successful prevention of MCI and/or its conversion to AD also prevents the subsequent AD. By pulling this string, one demonstrated cause of amnestic MCI appears to be the deficiency of G protein-coupled receptor-5 (GRK5). The most compelling evidence is that GRK5 knockout (GRK5KO) mice naturally develop into aMCI during aging. Moreover, GRK5 deficiency was reported to occur during prodromal stage of AD in CRND8 transgenic mice. When a GRK5KO mouse was crossbred with Tg2576 Swedish amyloid precursor protein transgenic mouse, the resulted double transgenic GAP mice displayed exaggerated behavioral and pathological changes across the spectrum of AD pathogenesis. Therefore, the GRK5 deficiency possesses unique features and advantage to serve as a prophylactic therapeutic target for MCI due to AD.
Collapse
Affiliation(s)
- William Z Suo
- Laboratory for Alzheimer's Disease & Aging Research, VA Medical Center, Kansas City, MO, USA.,Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA.,Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA.,The University of Kansas Alzheimer's Disease Center, Kansas City, KS, USA
| |
Collapse
|
5
|
Neuropharmacology of Cevimeline and Muscarinic Drugs-Focus on Cognition and Neurodegeneration. Int J Mol Sci 2021; 22:ijms22168908. [PMID: 34445613 PMCID: PMC8396258 DOI: 10.3390/ijms22168908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 12/18/2022] Open
Abstract
At present, Alzheimer’s disease (AD) and related dementias cannot be cured. Therefore, scientists all over the world are trying to find a new approach to prolong an active life of patients with initial dementia. Both pharmacological and non-pharmacological pathways are investigated to improve the key symptom of the disease, memory loss. In this respect, influencing the neuromodulator acetylcholine via muscarinic receptors, such as cevimeline, might be one of the therapeutic alternatives. The purpose of this study is to explore the potential of cevimeline on the cognitive functions of AD patients. The methodology is based on a systematic literature review of available studies found in Web of Science, PubMed, Springer, and Scopus on the research topic. The findings indicate that cevimeline has shown an improvement in experimentally induced cognitive deficits in animal models. Furthermore, it has demonstrated to positively influence tau pathology and reduce the levels of amyloid-β (Aβ) peptide in the cerebral spinal fluid of Alzheimer’s patients. Although this drug has not been approved by the FDA for its use among AD patients and there is a lack of clinical studies confirming and extending this finding, cevimeline might represent a breakthrough in the treatment of AD.
Collapse
|
6
|
Inhibition of miR-134-5p protects against kainic acid-induced excitotoxicity through Sirt3-mediated preservation of mitochondrial function. Epilepsy Res 2021; 176:106722. [PMID: 34273723 DOI: 10.1016/j.eplepsyres.2021.106722] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 07/07/2021] [Accepted: 07/09/2021] [Indexed: 12/31/2022]
Abstract
Epilepsy is a neurological disorder which is characterized by brain hyper-excitability and manifests as seizure. Due to its complicated pathogenesis, treatment for epilepsy still remains a huge challenge for neurology in the whole world. MciroRNA-134 (miR-134) is one kind of miRNAs which was firstly found abundant in synapses. In this study, we tried to unveil the role of inhibiting MciroRNA-134-5p (miR-134-5p) in excitotoxicity induced by kainic acid (KA) in the hippocampal neurons (HT22) cells. The results showed that treatment of KA increased the expression of miR-134-5p significantly and caused marked neuron excitotoxicity, evidenced by risen cell death rate, higher LDH release and aggravated cell viability. After suppressing miR-134-5p expression via transfecting HT22 cells with miR-134-5p antisense (Anti-134), cell viability was promoted obviously, along with decreased LDH release and cell death rate. In addition, KA-induced lipid peroxidation, cytochrome c release and mitochondrial ROS generation were also attenuated by Anti-134. The level of Sirtuin 3 (Sirt3) and its downstream antioxidant enzymes, such as mitochondrial superoxide dismutase 2 (SOD2), isocitrate dehydrogenase 2 (IDH2) and glutathione peroxidase (GSH-Px), were significantly higher in Anti-134 group compared with the control and scramble group. After inhibiting Sirt3 expression with SiRNA targeting Sirt3 (Si-Sirt3) and 3-(1H-1,2,3-triazol-4-yl) pyridine (3-TYP), the positive role of Anti-134 was apparently reversed. In conclusion, this research highly suggests that inhibition of miR-134-5p could protect neurons from KA-induced excitotoxicity through Sirt3-mediated preservation of mitochondrial function.
Collapse
|
7
|
Wysocka A, Palasz E, Steczkowska M, Niewiadomska G. Dangerous Liaisons: Tau Interaction with Muscarinic Receptors. Curr Alzheimer Res 2021; 17:224-237. [PMID: 32329686 PMCID: PMC7509759 DOI: 10.2174/1567205017666200424134311] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 02/05/2020] [Accepted: 03/25/2020] [Indexed: 11/22/2022]
Abstract
The molecular processes underlying neurodegenerative diseases (such as Alzheimer's Disease - AD) remain poorly understood. There is also an imperative need for disease-modifying therapies in AD since the present treatments, acetylcholinesterase inhibitors and NMDA antagonists, do not halt its progression. AD and other dementias present unique pathological features such as that of microtubule associated protein tau metabolic regulation. Tau has numerous binding partners, including signaling molecules, cytoskeletal elements and lipids, which suggests that it is a multifunctional protein. AD has also been associated with severe loss of cholinergic markers in the brain and such loss may be due to the toxic interaction of tau with cholinergic muscarinic receptors. By using specific antagonists of muscarinic receptors it was found in vitro that extracellular tau binds to M1 and M3 receptors and which the increase of intracellular calcium found in neuronal cells upon tau-binding. However, so far, the significance of tau signaling through muscarinic receptor in vivo in tauopathic models remains uncertain. The data reviewed in the present paper highlight the significant effect of M1 receptor/tau interaction in exacerbating tauopathy related pathological features and suggest that selective M1 agonists may serve as a prototype for future therapeutic development toward modification of currently intractable neurodegenerative diseases, such as tauopathies.
Collapse
Affiliation(s)
- Adrianna Wysocka
- Neurobiology Center, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland
| | - Ewelina Palasz
- Department of Applied Physiology, Mossakowski Medical Research Center, 02-093 Warsaw, Poland
| | - Marta Steczkowska
- Department of Applied Physiology, Mossakowski Medical Research Center, 02-093 Warsaw, Poland
| | - Grazyna Niewiadomska
- Neurobiology Center, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland
| |
Collapse
|
8
|
Chaudhary PK, Kim S. The GRKs Reactome: Role in Cell Biology and Pathology. Int J Mol Sci 2021; 22:ijms22073375. [PMID: 33806057 PMCID: PMC8036551 DOI: 10.3390/ijms22073375] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/21/2021] [Accepted: 03/22/2021] [Indexed: 02/06/2023] Open
Abstract
G protein-coupled receptor kinases (GRKs) are protein kinases that function in concert with arrestins in the regulation of a diverse class of G protein-coupled receptors (GPCRs) signaling. Although GRKs and arrestins are key participants in the regulation of GPCR cascades, the complex regulatory mechanisms of GRK expression, its alternation, and their function are not thoroughly understood. Several studies together with the work from our lab in recent years have revealed the critical role of these kinases in various physiological and pathophysiological processes, including cardiovascular biology, inflammation and immunity, neurodegeneration, thrombosis, and hemostasis. A comprehensive understanding of the mechanisms underlying functional interactions with multiple receptor proteins and how these interactions take part in the development of various pathobiological processes may give rise to novel diagnostic and therapeutic strategies. In this review, we summarize the current research linking the role of GRKs to various aspects of cell biology, pathology, and therapeutics, with a particular focus on thrombosis and hemostasis.
Collapse
|
9
|
Targeting GRK5 for Treating Chronic Degenerative Diseases. Int J Mol Sci 2021; 22:ijms22041920. [PMID: 33671974 PMCID: PMC7919044 DOI: 10.3390/ijms22041920] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/11/2021] [Accepted: 02/12/2021] [Indexed: 12/27/2022] Open
Abstract
G protein-coupled receptors (GPCRs) are the largest family of cell-surface receptors and they are responsible for the transduction of extracellular signals, regulating almost all aspects of mammalian physiology. These receptors are specifically regulated by a family of serine/threonine kinases, called GPCR kinases (GRKs). Given the biological role of GPCRs, it is not surprising that GRKs are also involved in several pathophysiological processes. Particular importance is emerging for GRK5, which is a multifunctional protein, expressed in different cell types, and it has been found located in single or multiple subcellular compartments. For instance, when anchored to the plasma membrane, GRK5 exerts its canonical function, regulating GPCRs. However, under certain conditions (e.g., pro-hypertrophic stimuli), GRK5 translocates to the nucleus of cells where it can interact with non-GPCR-related proteins as well as DNA itself to promote “non-canonical” signaling, including gene transcription. Importantly, due to these actions, several studies have demonstrated that GRK5 has a pivotal role in the pathogenesis of chronic-degenerative disorders. This is true in the cardiac cells, tumor cells, and neurons. For this reason, in this review article, we will inform the readers of the most recent evidence that supports the importance of targeting GRK5 to prevent the development or progression of cancer, cardiovascular, and neurological diseases.
Collapse
|
10
|
Gurevich EV, Gurevich VV. GRKs as Modulators of Neurotransmitter Receptors. Cells 2020; 10:cells10010052. [PMID: 33396400 PMCID: PMC7823573 DOI: 10.3390/cells10010052] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 12/23/2020] [Accepted: 12/30/2020] [Indexed: 01/08/2023] Open
Abstract
Many receptors for neurotransmitters, such as dopamine, norepinephrine, acetylcholine, and neuropeptides, belong to the superfamily of G protein-coupled receptors (GPCRs). A general model posits that GPCRs undergo two-step homologous desensitization: the active receptor is phosphorylated by kinases of the G protein-coupled receptor kinase (GRK) family, whereupon arrestin proteins specifically bind active phosphorylated receptors, shutting down G protein-mediated signaling, facilitating receptor internalization, and initiating distinct signaling pathways via arrestin-based scaffolding. Here, we review the mechanisms of GRK-dependent regulation of neurotransmitter receptors, focusing on the diverse modes of GRK-mediated phosphorylation of receptor subtypes. The immediate signaling consequences of GRK-mediated receptor phosphorylation, such as arrestin recruitment, desensitization, and internalization/resensitization, are equally diverse, depending not only on the receptor subtype but also on phosphorylation by GRKs of select receptor residues. We discuss the signaling outcome as well as the biological and behavioral consequences of the GRK-dependent phosphorylation of neurotransmitter receptors where known.
Collapse
|
11
|
Sueishi T, Akasaki Y, Goto N, Kurakazu I, Toya M, Kuwahara M, Uchida T, Hayashida M, Tsushima H, Bekki H, Lotz MK, Nakashima Y. GRK5 Inhibition Attenuates Cartilage Degradation via Decreased NF-κB Signaling. Arthritis Rheumatol 2020; 72:620-631. [PMID: 31696655 DOI: 10.1002/art.41152] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 10/29/2019] [Indexed: 12/26/2022]
Abstract
OBJECTIVE NF-κB-dependent signaling is an important modulator in osteoarthritis (OA), and G protein-coupled receptor kinase 5 (GRK5) regulates the NF-κB pathway. This study was undertaken to investigate the functional involvement of GRK5 in OA pathogenesis. METHODS GRK5 expression in normal and OA human knee joints was analyzed immunohistochemically. Gain- or loss-of-function experiments were performed using human and mouse chondrocytes. OA was induced in GRK5-knockout mice by destabilization of the medial meniscus, and histologic examination was performed. OA was also induced in wild-type mice, which were then treated with an intraarticular injection of amlexanox, a selective GRK5 inhibitor, every 5 days for 8 weeks. RESULTS GRK5 protein expression was increased in human OA cartilage. In vitro, expression levels of OA-related factors and NF-κB transcriptional activation were down-regulated by suppression of the GRK5 gene in human OA chondrocytes (3.49-fold decrease in IL6 [P < 0.01], 2.43-fold decrease in MMP13 [P < 0.01], and 2.66-fold decrease in ADAMTS4 [P < 0.01]). Conversely, GRK5 overexpression significantly increased the expression of OA-related catabolic mediators and NF-κB transcriptional activation. On Western blot analysis, GRK5 deletion reduced IκBα phosphorylation (up to 4.4-fold decrease [P < 0.05]) and decreased p65 nuclear translocation (up to 6.4-fold decrease [P < 0.01]) in mouse chondrocytes. In vivo, both GRK5 deletion and intraarticular amlexanox protected mouse cartilage against OA. CONCLUSION Our results suggest that GRK5 regulates cartilage degradation through a catabolic response mediated by NF-κB signaling, and is a potential target for OA treatment. Furthermore, amlexanox may be a major compound in relevant drugs.
Collapse
Affiliation(s)
- Takuya Sueishi
- Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Yukio Akasaki
- Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Norio Goto
- Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Ichiro Kurakazu
- Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Masakazu Toya
- Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Masanari Kuwahara
- Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Taisuke Uchida
- Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | | | | | - Hirofumi Bekki
- Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan, and Scripps Research Institute, San Diego, California
| | | | | |
Collapse
|
12
|
Apostolakou AE, Baltoumas FA, Stravopodis DJ, Iconomidou VA. Extended Human G-Protein Coupled Receptor Network: Cell-Type-Specific Analysis of G-Protein Coupled Receptor Signaling Pathways. J Proteome Res 2019; 19:511-524. [PMID: 31774292 DOI: 10.1021/acs.jproteome.9b00754] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
G-protein coupled receptors (GPCRs) mediate crucial physiological functions in humans, have been implicated in an array of diseases, and are therefore prime drug targets. GPCRs signal via a multitude of pathways, mainly through G-proteins and β-arrestins, to regulate effectors responsible for cellular responses. The limited number of transducers results in different GPCRs exerting control on the same pathway, while the availability of signaling proteins in a cell defines the result of GPCR activation. The aim of this study was to construct the extended human GPCR network (hGPCRnet) and examine the effect that cell-type specificity has on GPCR signaling pathways. To achieve this, protein-protein interaction data between GPCRs, G-protein coupled receptor kinases (GRKs), Gα subunits, β-arrestins, and effectors were combined with protein expression data in cell types. This resulted in the hGPCRnet, a very large interconnected network, and similar cell-type-specific networks in which, distinct GPCR signaling pathways were formed. Finally, a user friendly web application, hGPCRnet ( http://bioinformatics.biol.uoa.gr/hGPCRnet ), was created to allow for the visualization and exploration of these networks and of GPCR signaling pathways. This work, and the resulting application, can be useful in further studies of GPCR function and pharmacology.
Collapse
Affiliation(s)
- Avgi E Apostolakou
- Section of Cell Biology and Biophysics, Department of Biology, School of Sciences , National and Kapodistrian University of Athens , Panepistimiopolis , Athens 15701 , Greece
| | - Fotis A Baltoumas
- Section of Cell Biology and Biophysics, Department of Biology, School of Sciences , National and Kapodistrian University of Athens , Panepistimiopolis , Athens 15701 , Greece
| | - Dimitrios J Stravopodis
- Section of Cell Biology and Biophysics, Department of Biology, School of Sciences , National and Kapodistrian University of Athens , Panepistimiopolis , Athens 15701 , Greece
| | - Vassiliki A Iconomidou
- Section of Cell Biology and Biophysics, Department of Biology, School of Sciences , National and Kapodistrian University of Athens , Panepistimiopolis , Athens 15701 , Greece
| |
Collapse
|
13
|
Fang W, Liao W, Zheng Y, Huang X, Weng X, Fan S, Chen X, Zhang X, Chen J, Xiao S, Thea A, Luan P, Liu J. Neurotropin reduces memory impairment and neuroinflammation via BDNF/NF-κB in a transgenic mouse model of Alzheimer's disease. Am J Transl Res 2019; 11:1541-1554. [PMID: 30972181 PMCID: PMC6456545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 12/28/2018] [Indexed: 06/09/2023]
Abstract
Alzheimer's disease (AD) is a devastating neurodegenerative disease with limited treatments and no cure. Neurotropin (NTP) is an analgesic drug widely prescribed for neuropathic pain. Increasing evidence suggests that NTP may also protect against neurodegeneration, but NTP's treatment potential against memory impairments of AD remains to be explored. APP/PS1 mice, which model AD, were given NTP for three months then cognitively tested with the Morris water maze. Their Aβ burden, microglial and astrocytic activation, and BDNF levels were compared to untreated controls using immunofluorescent staining. Expression of pro-inflammatory cytokines (IL-1β, IL-6 and TNF-α) and NF-κB pathway related proteins (p65 and IκB-α) were examined by ELISA or Western blots in vivo and in vitro in the microglia cell line. Lastly, BV-2 cells were pre-treated with the selective BDNF inhibitor ANA-12 and with NTP to examine mechanistic pathways. Taken together, NTP treatment reduced cognitive impairment, Aβ deposits, and glial activation in cortex and hippocampus APP/PS1 mice. IL-1β, IL-6 and TNF-α also decreased after NTP treatment in vivo and in vitro, and BDNF levels rose. Also, NTP reduced p65 and IκB-α activation and the effect of NTP on pro-inflammatory cytokines and NF-κB pathway related proteins was abolished by BDNF inhibitor. Our results indicate that NTP reduces neuroinflammation and improves the cognitive deficits in APP/PS1 mice possibly via BDNF/NF-κB pathway. NTP may be a new promising drug candidate for patients with AD.
Collapse
Affiliation(s)
- Wenli Fang
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
| | - Wang Liao
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
- Department of Psychiatry, McLean Hospital, Harvard Medical SchoolBelmont, MA 02478, USA
| | - Yuqiu Zheng
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
| | - Xiaoyun Huang
- Department of Neurology, The Affiliated Houjie Hospital, Guangdong Medical UniversityDongguan 523945, Guangdong, China
| | - Xueling Weng
- Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
| | - Shengnuo Fan
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
| | - Xiaoyu Chen
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
- People’s Hospital of Zhongshan CityZhongshan 528403, Guangdong, China
| | - Xingmei Zhang
- Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine, Karolinska University HospitalKarolinska Sjukhuset, Sweden
| | - Jianjun Chen
- Department of Psychiatry, McLean Hospital, Harvard Medical SchoolBelmont, MA 02478, USA
| | - Songhua Xiao
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
| | - Anderson Thea
- Department of Psychiatry, McLean Hospital, Harvard Medical SchoolBelmont, MA 02478, USA
| | - Ping Luan
- Medicine School, Shenzhen UniversityShenzhen 518060, Guangdong, China
| | - Jun Liu
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
- Laboratory of RNA and Major Diseases of Brain and Heart, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
- Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen UniversityGuangzhou 510120, Guangdong, China
| |
Collapse
|
14
|
Hendrickx JO, van Gastel J, Leysen H, Santos-Otte P, Premont RT, Martin B, Maudsley S. GRK5 - A Functional Bridge Between Cardiovascular and Neurodegenerative Disorders. Front Pharmacol 2018; 9:1484. [PMID: 30618771 PMCID: PMC6304357 DOI: 10.3389/fphar.2018.01484] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 12/03/2018] [Indexed: 12/15/2022] Open
Abstract
Complex aging-triggered disorders are multifactorial programs that comprise a myriad of alterations in interconnected protein networks over a broad range of tissues. It is evident that rather than being randomly organized events, pathophysiologies that possess a strong aging component such as cardiovascular diseases (hypertensions, atherosclerosis, and vascular stiffening) and neurodegenerative conditions (dementia, Alzheimer's disease, mild cognitive impairment, Parkinson's disease), in essence represent a subtly modified version of the intricate molecular programs already in place for normal aging. To control such multidimensional activities there are layers of trophic protein control across these networks mediated by so-called "keystone" proteins. We propose that these "keystones" coordinate and interconnect multiple signaling pathways to control whole somatic activities such as aging-related disease etiology. Given its ability to control multiple receptor sensitivities and its broad protein-protein interactomic nature, we propose that G protein coupled receptor kinase 5 (GRK5) represents one of these key network controllers. Considerable data has emerged, suggesting that GRK5 acts as a bridging factor, allowing signaling regulation in pathophysiological settings to control the connectivity between both the cardiovascular and neurophysiological complications of aging.
Collapse
Affiliation(s)
- Jhana O. Hendrickx
- Department of Biomedical Science, University of Antwerp, Antwerp, Belgium
- Center for Molecular Neurology, University of Antwerp – Flanders Institute for Biotechnology (VIB), Antwerp, Belgium
| | - Jaana van Gastel
- Department of Biomedical Science, University of Antwerp, Antwerp, Belgium
- Center for Molecular Neurology, University of Antwerp – Flanders Institute for Biotechnology (VIB), Antwerp, Belgium
| | - Hanne Leysen
- Department of Biomedical Science, University of Antwerp, Antwerp, Belgium
- Center for Molecular Neurology, University of Antwerp – Flanders Institute for Biotechnology (VIB), Antwerp, Belgium
| | - Paula Santos-Otte
- Institute of Biophysics, Humboldt-Universitat zu Berlin, Berlin, Germany
| | - Richard T. Premont
- Harrington Discovery Institute, Case Western Reserve University, Cleveland, GA, United States
| | - Bronwen Martin
- Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Stuart Maudsley
- Department of Biomedical Science, University of Antwerp, Antwerp, Belgium
- Center for Molecular Neurology, University of Antwerp – Flanders Institute for Biotechnology (VIB), Antwerp, Belgium
| |
Collapse
|
15
|
Zhao J, Li X, Chen X, Cai Y, Wang Y, Sun W, Mai H, Yang J, Fan W, Tang P, Ou M, Zhang Y, Huang X, Zhao B, Cui L. GRK5 influences the phosphorylation of tau via GSK3β and contributes to Alzheimer's disease. J Cell Physiol 2018; 234:10411-10420. [PMID: 30511419 DOI: 10.1002/jcp.27709] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 10/15/2018] [Indexed: 12/18/2022]
Abstract
G protein-coupled receptor kinase 5 (GRK5) is a serine/threonine kinase whose dysfunction results in cognitive impairment and Alzheimer-like pathology, including tau hyperphosphorylation. However, the mechanisms whereby GRK5 influences tau phosphorylation remain incompletely understood. In the current study, we showed that GRK5 influenced the phosphorylation of tau via glycogen synthase kinase 3β (GSK3β). The activity of both tau and GSK3β in the hippocampus was increased in aged GRK5-knockout mice, which is consistent with what occurs in APP/PS1 transgenic mice. Furthermore, GRK5 regulated the activity of GSK3β and phosphorylated tau in vitro. Regardless of changes of GRK5 protein levels, tau hyperphosphorylation remained reduced after GSK3β activity was inhibited, suggesting that GRK5 may specifically influence tau hyperphosphorylation by modulating GSK3β activity. Taken together, our findings suggest that GRK5 deficiency contributes to the pathogenesis of Alzheimer's disease by influencing the hyperphosphorylation of tau through the activation of GSK3β.
Collapse
Affiliation(s)
- Jianghao Zhao
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Neurology, Dongguan People's Hospital, Dongguan, China
| | - Xiaohui Li
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Xiongjin Chen
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yujie Cai
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yan Wang
- Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life, Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Wenjing Sun
- Key Laboratory for Medical Molecular Diagnostics of Guangdong Province, China-America Cancer Research Institute, Guangdong Medical University, Dongguan, China
| | - Hui Mai
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Jingqi Yang
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Weihao Fan
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Pei Tang
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Mingqian Ou
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yuan Zhang
- Institute for Translational Medicine, College of Medicine, Qingdao University, Qingdao, China
| | - Xuemei Huang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Bin Zhao
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Lili Cui
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| |
Collapse
|
16
|
Abstract
Proinflammatory reaction by the body occurs acutely in response to injury that is considered primarily beneficial. However, sustained proinflammatory cytokines observed with chronic pathologies such as metabolic syndrome, cancer, and arthritis are detrimental and in many cases is a major cardiovascular risk factor. Proinflammatory cytokines such as interleukin-1, interleukin-6, and tumor necrosis factor α (TNFα) have long been implicated in cardiovascular risk and considered to be a major underlying cause for heart failure (HF). The failure of the anti-TNFα therapy for HF indicates our elusive understanding on the dichotomous role of proinflammatory cytokines on acutely beneficial effects versus long-term deleterious effects. Despite these well-described observations, less is known about the mechanistic underpinnings of proinflammatory cytokines especially TNFα in pathogenesis of HF. Increasing evidence suggests the existence of an active cross-talk between the TNFα receptor signaling and G-protein-coupled receptors such as β-adrenergic receptor (βAR). Given that βARs are the key regulators of cardiac function, the review will discuss the current state of understanding on the role of proinflammatory cytokine TNFα in regulating βAR function.
Collapse
Affiliation(s)
- Maradumane L Mohan
- *Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH; and †Cardiovascular Research Institute, Case Western Reserve University, Cleveland, OH
| | | | | |
Collapse
|
17
|
Zhang Y, Zhao J, Yin M, Cai Y, Liu S, Wang Y, Zhang X, Cao H, Chen T, Huang P, Mai H, Liu Z, Tao H, Zhao B, Cui L. The influence of two functional genetic variants of GRK5 on tau phosphorylation and their association with Alzheimer's disease risk. Oncotarget 2017; 8:72714-72726. [PMID: 29069820 PMCID: PMC5641163 DOI: 10.18632/oncotarget.20283] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 07/23/2017] [Indexed: 11/25/2022] Open
Abstract
Our work explores the relationship between G protein-coupled receptor kinase-5 (GRK5) single nucleotide polymorphisms and Alzheimer's disease risk. We confirmed that GRK5 translocates from the cellular membrane to the cytosol in the hippocampus of Alzheimer's disease mice and that GRK5 deficiency promotes tau hyperphosphorylation, a hallmark of Alzheimer's disease pathology. Our results indicate that one functional variant, or mutant, of GRK5 (GRK5-Gln41Leu) decreased GRK5 translocation from the membrane to the cytoplasm and reduced tau hyperphosphorylation, whereas, another GRK5 mutant (GRK5-Arg304His) increased GRK5 translocation to the cytoplasm and promoted tau hyperphosphorylation. In addition, case-control studies revealed that GRK5-Gln41Leu is associated with a lower risk of late-onset Alzheimer's disease. Our findings suggest that the GRK5-Gln41Leu mutant may resist tau hyperphosphorylation by promoting GRK5 membrane stability and, in effect, may contribute to lower Alzheimer's disease risk.
Collapse
Affiliation(s)
- Yuan Zhang
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Institute for Translational Medicine, College of Medicine, Qingdao University, Qingdao, China
| | - Jianghao Zhao
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Mingkang Yin
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yujie Cai
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Shengyuan Liu
- Department of Chronic Disease, Shenzhen Nanshan Center for Chronic Disease Control, Shenzhen, China
| | - Yan Wang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Xingliang Zhang
- Department of Pediatrics, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Hao Cao
- Departments of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
| | - Ting Chen
- Clinical Research Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Pengru Huang
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Hui Mai
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Zhou Liu
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Hua Tao
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Bin Zhao
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Lili Cui
- Guangdong Key Laboratory of Age-related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| |
Collapse
|
18
|
Steury MD, McCabe LR, Parameswaran N. G Protein-Coupled Receptor Kinases in the Inflammatory Response and Signaling. Adv Immunol 2017; 136:227-277. [PMID: 28950947 DOI: 10.1016/bs.ai.2017.05.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
G protein-coupled receptor kinases (GRKs) are serine/threonine kinases that regulate a large and diverse class of G protein-coupled receptors (GPCRs). Through GRK phosphorylation and β-arrestin recruitment, GPCRs are desensitized and their signal terminated. Recent work on these kinases has expanded their role from canonical GPCR regulation to include noncanonical regulation of non-GPCR and nonreceptor substrates through phosphorylation as well as via scaffolding functions. Owing to these and other regulatory roles, GRKs have been shown to play a critical role in the outcome of a variety of physiological and pathophysiological processes including chemotaxis, signaling, migration, inflammatory gene expression, etc. This diverse set of functions for these proteins makes them popular targets for therapeutics. Role for these kinases in inflammation and inflammatory disease is an evolving area of research currently pursued in many laboratories. In this review, we describe the current state of knowledge on various GRKs pertaining to their role in inflammation and inflammatory diseases.
Collapse
Affiliation(s)
| | - Laura R McCabe
- Michigan State University, East Lansing, MI, United States
| | | |
Collapse
|
19
|
Fang WL, Zhao DQ, Wang F, Li M, Fan SN, Liao W, Zheng YQ, Liao SW, Xiao SH, Luan P, Liu J. Neurotropin® alleviates hippocampal neuron damage through a HIF-1α/MAPK pathway. CNS Neurosci Ther 2017; 23:428-437. [PMID: 28271615 DOI: 10.1111/cns.12689] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/09/2017] [Accepted: 02/09/2017] [Indexed: 01/13/2023] Open
Abstract
AIMS The main purpose was to verify the potent capacity of Neurotropin® against neuronal damage in hippocampus and to explore its underlying mechanisms. METHODS HT22 cells were treated with 40 μmol/L Aβ25-35 in the presence of various concentrations of Neurotropin® or in its absence. The cell viability was assessed with a CCK-8 assay, and flow cytometry was used to measure cell apoptosis, intracellular ROS levels, and mitochondrial membrane potential. Aβ plaques were examined by Bielschowsky silver staining, and the activities of antioxidants were detected in hippocampus of APP/PS1 mice after Neurotropin® treatment. The expression of proteins, including HIF-1α, Bcl-2, Bax, and MAPKs signaling molecules was evaluated by Western blot. RESULTS Neurotropin® significantly reversed the cell injury induced by Aβ25-35 through increasing cell viability and mitochondrial membrane potential, decreasing intracellular ROS and cell apoptosis of HT22 cells (P<.05). Furthermore, Neurotropin® markedly reduced the formation of Aβ plaques and upregulated the activities of antioxidants (P<.05). Additionally, the protein expression of HIF-1α, p-ERK1/2, p-JNK, and p-P38 was significantly inhibited in hippocampus of APP/PS1 mice. CONCLUSIONS Neurotropin® exhibited a potent neuroprotective effect on inhibiting Aβ-induced oxidative damage and alleviating Aβ deposition in hippocampus via modulation of HIF-1α/MAPK signaling pathway.
Collapse
Affiliation(s)
- Wen-Li Fang
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - De-Qiang Zhao
- Department of Neurology, Nanfang Hospital Huiqiao Medical Center, Guangzhou, Guangdong, China
| | - Fei Wang
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Mei Li
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Sheng-Nuo Fan
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Wang Liao
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Yu-Qiu Zheng
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Shao-Wei Liao
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Song-Hua Xiao
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Ping Luan
- Medicine School, Shenzhen University, Shenzhen, Guangdong, China
| | - Jun Liu
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China.,Laboratory of RNA and Major Diseases of Brain and Heart, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China.,Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
| |
Collapse
|
20
|
Liao W, Jiang M, Li M, Jin C, Xiao S, Fan S, Fang W, Zheng Y, Liu J. Magnesium Elevation Promotes Neuronal Differentiation While Suppressing Glial Differentiation of Primary Cultured Adult Mouse Neural Progenitor Cells through ERK/CREB Activation. Front Neurosci 2017; 11:87. [PMID: 28280456 PMCID: PMC5322230 DOI: 10.3389/fnins.2017.00087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 02/10/2017] [Indexed: 12/25/2022] Open
Abstract
This study aimed to explore the influence of magnesium elevation on fate determination of adult neural progenitor cells (aNPCs) and the underlying mechanism in vitro. Adult neurogenesis, which is the generation of functional neurons from neural precursors, occurs throughout life in restricted anatomical regions in mammals. Magnesium is the fourth most abundant ion in mammals, and its elevation in the brain has been shown to enhance memory and synaptic plasticity in vivo. However, the effects of magnesium on fate determination of aNPCs, which are vital processes in neurogenesis, remain unknown. NPCs isolated from the dentate gyrus of adult C57/BL6 mice were induced to differentiate in a medium with varying magnesium concentrations (0.6, 0.8, and 1.0 mM) and extracellular signal-regulated kinase (ERK) inhibitor PD0325901. The proportion of cells that differentiated into neurons and glial cells was evaluated using immunofluorescence. Quantitative real-time polymerase chain reaction and Western blot methods were used to determine the expression of β-III tubulin (Tuj1) and glial fibrillary acidic protein (GFAP). The activation of ERK and cAMP response element-binding protein (CREB) was examined by Western blot to reveal the underlying mechanism. Magnesium elevation increased the proportion of Tju1-positive cells and decreased the proportion of GFAP-positive cells. Also, the expression of Tuj1 was upregulated, whereas the expression of GFAP was downregulated. Moreover, magnesium elevation enhanced the activation of both ERK and CREB. Treatment with PD0325901 reversed these effects in a dose-dependent manner. Magnesium elevation promoted neural differentiation while suppressing glial cell differentiation, possibly via ERK-induced CREB activation.
Collapse
Affiliation(s)
- Wang Liao
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou, China; Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen UniversityGuangzhou, China; Laboratory of RNA and Major Diseases of Brain and Heart, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou, China
| | - Mujun Jiang
- Department of Neurology, Bengbu Medical College, The First Affiliated Hospital Bengbu, China
| | - Mei Li
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, China
| | - Congli Jin
- Department of Neurology, Affiliated Hospital of Guangdong Medical University Zhanjiang, China
| | - Songhua Xiao
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, China
| | - Shengnuo Fan
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, China
| | - Wenli Fang
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, China
| | - Yuqiu Zheng
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, China
| | - Jun Liu
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou, China; Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen UniversityGuangzhou, China; Laboratory of RNA and Major Diseases of Brain and Heart, Sun Yat-sen Memorial Hospital, Sun Yat-sen UniversityGuangzhou, China
| |
Collapse
|
21
|
Nanjidsuren T, Park CW, Sim BW, Kim SU, Chang KT, Kang MH, Min KS. GRK5-Knockout Mice Generated by TALEN-Mediated Gene Targeting. Anim Biotechnol 2016; 27:223-30. [DOI: 10.1080/10495398.2016.1176032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Tsevelmaa Nanjidsuren
- Animal Biotechnology, Graduate School of Future Convergence Technology, Institute of Genetic Engineering, Hankyong National University, Anseong, Republic of Korea
| | - Chae-Won Park
- Animal Biotechnology, Graduate School of Future Convergence Technology, Institute of Genetic Engineering, Hankyong National University, Anseong, Republic of Korea
| | - Bo-Woong Sim
- National Research Center, Korea Research Institute of Bioscience and Biotechnology, Ochang, Republic of Korea
| | - Sun-Uk Kim
- National Research Center, Korea Research Institute of Bioscience and Biotechnology, Ochang, Republic of Korea
| | - Kyu-Tae Chang
- National Research Center, Korea Research Institute of Bioscience and Biotechnology, Ochang, Republic of Korea
| | - Myung-Hwa Kang
- Department of Food and Nutrition, Hoseo University, Asan, Republic of Korea
| | - Kwan-Sik Min
- Animal Biotechnology, Graduate School of Future Convergence Technology, Institute of Genetic Engineering, Hankyong National University, Anseong, Republic of Korea
| |
Collapse
|
22
|
He M, Singh P, Cheng S, Zhang Q, Peng W, Ding X, Li L, Liu J, Premont RT, Morgan D, Burns JM, Swerdlow RH, Suo WZ. GRK5 Deficiency Leads to Selective Basal Forebrain Cholinergic Neuronal Vulnerability. Sci Rep 2016; 6:26116. [PMID: 27193825 PMCID: PMC4872166 DOI: 10.1038/srep26116] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 04/27/2016] [Indexed: 02/05/2023] Open
Abstract
Why certain diseases primarily affect one specific neuronal subtype rather than another is a puzzle whose solution underlies the development of specific therapies. Selective basal forebrain cholinergic (BFC) neurodegeneration participates in cognitive impairment in Alzheimer’s disease (AD), yet the underlying mechanism remains elusive. Here, we report the first recapitulation of the selective BFC neuronal loss that is typical of human AD in a mouse model termed GAP. We created GAP mice by crossing Tg2576 mice that over-express the Swedish mutant human β-amyloid precursor protein gene with G protein-coupled receptor kinase-5 (GRK5) knockout mice. This doubly defective mouse displayed significant BFC neuronal loss at 18 months of age, which was not observed in either of the singly defective parent strains or in the wild type. Along with other supporting evidence, we propose that GRK5 deficiency selectively renders BFC neurons more vulnerable to degeneration.
Collapse
Affiliation(s)
- Minchao He
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA
| | - Prabhakar Singh
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA
| | - Shaowu Cheng
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA
| | - Qiang Zhang
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA
| | - Wei Peng
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA
| | - XueFeng Ding
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA.,Department of Cognitive Sciences, Beijing Institute of Basic Medical Sciences, Beijing, 100850, P.R. China
| | - Longxuan Li
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA
| | - Jun Liu
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA.,Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, P. R. China
| | - Richard T Premont
- Department of Medicine, Duke Univ. Med. Center, Durham, NC 27710, USA
| | - Dave Morgan
- The Johnnie B. Byrd Alzheimer's Center &Research Institute, Tampa, FL 33620, USA.,Deptment of Molecular Pharmacology &Physiology, University of South Florida, Tampa, FL 33620, USA
| | - Jeffery M Burns
- Department of Neurology, University of Kansas Medical College, Kansas City, KS 66170, USA.,Department of Molecular and Integrative Physiology, University of Kansas Medical College, Kansas City, KS 66170, USA.,The University of Kansas Alzheimer's Disease Center, Kansas City, KS 66160, USA
| | - Russell H Swerdlow
- Department of Neurology, University of Kansas Medical College, Kansas City, KS 66170, USA.,Department of Molecular and Integrative Physiology, University of Kansas Medical College, Kansas City, KS 66170, USA.,The University of Kansas Alzheimer's Disease Center, Kansas City, KS 66160, USA
| | - William Z Suo
- Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, MO 64128, USA.,Department of Neurology, University of Kansas Medical College, Kansas City, KS 66170, USA.,Department of Molecular and Integrative Physiology, University of Kansas Medical College, Kansas City, KS 66170, USA.,The University of Kansas Alzheimer's Disease Center, Kansas City, KS 66160, USA
| |
Collapse
|
23
|
Abstract
G-protein-coupled receptor kinases (GRKs) are serine/threonine protein kinases originally discovered for their role in G-protein-coupled receptor (GPCR) phosphorylation. Recent studies have demonstrated a much broader function for this kinase family including phosphorylation of cytosolic substrates involved in cell signaling pathways stimulated by GPCRs, as well as by non-GPCRs. In addition, GRKs modulate signaling via phosphorylation-independent functions. Because of these various biochemical functions, GRKs have been shown to affect critical physiological and pathophysiological processes, and thus are considered as drug targets in diseases such as heart failure. Role of GRKs in inflammation and inflammatory diseases is an evolving area of research and several studies including work from our lab in the recent years have demonstrated critical role of GRKs in the immune system. In this review, we discuss the classical and the newly emerging functions of GRKs in the immune system and their role in inflammation and disease processes.
Collapse
|
24
|
Zhang Y, Wang N, Su P, Lu J, Wang Y. Disruption of dopamine D1 receptor phosphorylation at serine 421 attenuates cocaine-induced behaviors in mice. Neurosci Bull 2014; 30:1025-1035. [PMID: 25304015 DOI: 10.1007/s12264-014-1473-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 05/21/2014] [Indexed: 01/11/2023] Open
Abstract
Dopamine D1 receptors (D1Rs) play a key role in cocaine addiction, and multiple protein kinases such as GRKs, PKA, and PKC are involved in their phosphorylation. Recently, we reported that protein kinase D1 phosphorylates the D1R at S421 and promotes its membrane localization. Moreover, this phosphorylation of S421 is required for cocaineinduced behaviors in rats. In the present study, we generated transgenic mice over-expressing S421A-D1R in the forebrain. These transgenic mice showed reduced phospho-D1R (S421) and its membrane localization, and reduced downstream ERK1/2 activation in the striatum. Importantly, acute and chronic cocaine-induced locomotor hyperactivity and conditioned place preference were significantly attenuated in these mice. These findings provide in vivo evidence for the critical role of S421 phosphorylation of the D1R in its membrane localization and in cocaine-induced behaviors. Thus, S421 on the D1R represents a potential pharmacotherapeutic target for cocaine addiction and other drug-abuse disorders.
Collapse
Affiliation(s)
- Ying Zhang
- Neuroscience Research Institute and Department of Neurobiology, The Key Laboratory for Neuroscience of the Ministry of Education/National Health and Family Planning Commission, Peking University Health Science Center, Beijing, 100191, China
| | - Ning Wang
- Neuroscience Research Institute and Department of Neurobiology, The Key Laboratory for Neuroscience of the Ministry of Education/National Health and Family Planning Commission, Peking University Health Science Center, Beijing, 100191, China
| | - Ping Su
- Neuroscience Research Institute and Department of Neurobiology, The Key Laboratory for Neuroscience of the Ministry of Education/National Health and Family Planning Commission, Peking University Health Science Center, Beijing, 100191, China
| | - Jie Lu
- Neuroscience Research Institute and Department of Neurobiology, The Key Laboratory for Neuroscience of the Ministry of Education/National Health and Family Planning Commission, Peking University Health Science Center, Beijing, 100191, China
| | - Yun Wang
- Neuroscience Research Institute and Department of Neurobiology, The Key Laboratory for Neuroscience of the Ministry of Education/National Health and Family Planning Commission, Peking University Health Science Center, Beijing, 100191, China.
- PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, 100871, China.
| |
Collapse
|
25
|
He M, Liu J, Cheng S, Xing Y, Suo WZ. Differentiation renders susceptibility to excitotoxicity in HT22 neurons. Neural Regen Res 2014; 8:1297-306. [PMID: 25206424 PMCID: PMC4107644 DOI: 10.3969/j.issn.1673-5374.2013.14.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 02/23/2013] [Indexed: 12/31/2022] Open
Abstract
HT22 is an immortalized mouse hippocampal neuronal cell line that does not express cholinergic and glutamate receptors like mature hippocampal neurons in vivo. This in part prevents its use as a model for mature hippocampal neurons in memory-related studies. We now report that HT22 cells were appropriately induced to differentiate and possess properties similar to those of mature hippocampal neurons in vivo, such as becoming more glutamate-receptive and excitatory. Results showed that sensitivity of HT22 cells to glutamate-induced toxicity changed dramatically when comparing undifferentiated with differentiated cells, with the half-effective concentration for differentiated cells reducing approximately two orders of magnitude. Moreover, glutamate-induced toxicity in differentiated cells, but not undifferentiated cells, was inhibited by the N-methyl-D- aspartate receptor antagonists MK-801 and memantine. Evidently, differentiated HT22 cells expressed N-methyl-D-aspartate receptors, while undifferentiated cells did not. Our experimental findings indicated that differentiation is important for immortalized cell lines to render post-mitotic neuronal properties, and that differentiated HT22 neurons represent a better model of hippocampal neurons than undifferentiated cells.
Collapse
Affiliation(s)
- Minchao He
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China ; Laboratory for Alzheimer's Disease & Aging Research, Veterans Affairs Medical Center, Kansas, MO 64128, USA
| | - Jun Liu
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China ; Laboratory for Alzheimer's Disease & Aging Research, Veterans Affairs Medical Center, Kansas, MO 64128, USA
| | - Shaowu Cheng
- Laboratory for Alzheimer's Disease & Aging Research, Veterans Affairs Medical Center, Kansas, MO 64128, USA
| | - Yigang Xing
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
| | - William Z Suo
- Laboratory for Alzheimer's Disease & Aging Research, Veterans Affairs Medical Center, Kansas, MO 64128, USA ; Department of Neurology, University of Kansas Medical Center, Kansas, KS 66170, USA ; Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas, KS 66170, USA
| |
Collapse
|
26
|
Du Z, Dou X, Huang C, Gao J, Hu L, Zhu J, Qian Y, Dou M, Fan C. Preparation, drug releasing property and pharmacodynamics of soy isoflavone-loaded chitosan microspheres. PLoS One 2013; 8:e79698. [PMID: 24244544 PMCID: PMC3823575 DOI: 10.1371/journal.pone.0079698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2013] [Accepted: 09/24/2013] [Indexed: 11/27/2022] Open
Abstract
Soybean isoflavone (SIF) has anti-aging properties and many other biological functions; however, SIF is difficult to reach higher blood concentration due to its rapid metabolism. Therefore, it is of great value to design and produce a sustained-release formulation that is able to maintain a stable level of plasma concentrations. In this paper, soybean isoflavone sustained-release microsphere from chitosan and sodium alginate was prepared successfully. The important factors that determined the quality of the microspheres were the sodium alginate concentration in solution B, the ratio of soybean isoflavone to chitosan and the mixing speed. The relative yield, encapsulation efficiency and drug loading capability of SIF were much higher than the existing commercial formulations. In real gastrointestinal conditions, compared with the non-sustained release group, the release rate of SIF slowed down and the reaction time was prolonged. Animal experiments showed that sustained-release microspheres intensified the anti-aging potentials of SIF. Compared with the Non-sustained release (NSR) group mice, oral SIF/CHI microsphere treated mice were better in the Morris Water Maze Test (MWMT), the MDA level in the both plasma and brain of the sustained release (SR) group mice decreased, and SOD content was remarkably improved.
Collapse
Affiliation(s)
- Zhongyan Du
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Xiaobing Dou
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Chenyun Huang
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Jia Gao
- College of Management, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Linfeng Hu
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Jiazhen Zhu
- College of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Ying Qian
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Minhua Dou
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Chunlei Fan
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, PR China
| |
Collapse
|
27
|
Luan P, Zhou HH, Zhang B, Liu AM, Yang LH, Weng XL, Tao EX, Liu J. Basic fibroblast growth factor protects C17.2 cells from radiation-induced injury through ERK1/2. CNS Neurosci Ther 2013; 18:767-72. [PMID: 22943143 DOI: 10.1111/j.1755-5949.2012.00365.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
AIMS To establish a radiation-induced neural injury model using C17.2 neural stem cells (NSCs) and to investigate whether basic fibroblast growth factor (bFGF) can protect the radiation-induced injury of C17.2 NSCs. Furthermore, we aim to identify the possible mechanisms involved in this model. METHODS C17.2 NSCs received a single exposure (3, 6, and 9 Gy, respectively) at a dose rate of 300 cGy/min with a control group receiving 0 Gy. Different concentrations of bFGF were added for 24 h, 5 min postirradiation. The MTS assay and flow cytometry were used to detect cytotoxicity and apoptosis. Expression of FGFR1, ERK1/2, and p-ERK1/2 proteins was detected with or without U0126 was pretreated prior to C17.2 NSCs receiving irradiation. RESULTS C17.2 NSCs showed a dose-dependent cell death as the dose of radiation was increased. Additionally, the rate of apoptosis in the C17.2 NSCs reached 31.2 ± 1.23% in the 6 Gy irradiation group, which was the most significant when compared to the other irradiation treated groups. bFGF showed protective effect on cell apoptosis in a dose-dependent manner. The mean percentage of apoptotic cells decreased to 7.83 ± 1.75% when 100 ng/mL bFGF was given. Furthermore, U0126 could block the protective effect of bFGF by inhibiting the phosphorylation of ERK1/2. CONCLUSIONS An in vitro cellular model of radiation-induced apoptosis of NSCs, in C17.2 NSCs, was developed successfully. Additionally, bFGF can protect neurons from radiation injury in vitro via the ERK1/2 signal transduction pathway.
Collapse
Affiliation(s)
- Ping Luan
- Medical School, Shenzhen University, China
| | | | | | | | | | | | | | | |
Collapse
|
28
|
Suo WZ. Accelerating Alzheimer’s pathogenesis by GRK5 deficiency via cholinergic dysfunction. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/aad.2013.24020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
29
|
Zhao ZY, Luan P, Huang SX, Xiao SH, Zhao J, Zhang B, Gu BB, Pi RB, Liu J. Edaravone protects HT22 neurons from H2O2-induced apoptosis by inhibiting the MAPK signaling pathway. CNS Neurosci Ther 2012; 19:163-9. [PMID: 23253171 DOI: 10.1111/cns.12044] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Revised: 11/12/2012] [Accepted: 11/12/2012] [Indexed: 01/20/2023] Open
Abstract
AIMS Oxidative stress is frequently implicated in the pathology of neurodegenerative diseases. This study aimed to investigate the effects and their underlying mechanism(s) of edaravone upon hydrogen peroxide (H2O2)-induced oxidative stress and apoptosis in HT22 cells, a murine hippocampal neuronal model. METHODS HT22 cells were treated with H2O2 in the presence of various concentrations of edaravone or in its absence. A CCK-8 assay, Hoechst 33342 staining, and flow cytometry were used to detect cytotoxicity and apoptosis. In addition, the levels of reactive oxygen species (ROS) and the expression of Bcl-2, Bax, p-ERK 1/2, p-JNK, and p-P38 proteins in HT22 cells were examined. RESULTS Exogenous H2O2 decreased cell viability in a concentration-dependent manner and was associated with increased apoptosis and ROS production. Moreover, H2O2 significantly activated and upregulated the expression of p-ERK 1/2, p-JNK, and p-P38, while edaravon protected HT22 cells against H2O2-induced injury by inhibiting the production of ROS and activating the MAPK signaling pathway. CONCLUSIONS Our results provide the first evidence that edaravone can protect H2O2-induced cell injury in HT22 neurons via its antioxidant action. These findings suggest that edaravone may be useful in the treatment of neurodegenerative disorders in which oxidative stress has been principally implicated.
Collapse
Affiliation(s)
- Zhong-Yan Zhao
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Mikroulis AV, Psarropoulou C. Endogenous ACh effects on NMDA-induced interictal-like discharges along the septotemporal hippocampal axis of adult rats and their modulation by an early life generalized seizure. Epilepsia 2012; 53:879-87. [DOI: 10.1111/j.1528-1167.2012.03440.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
31
|
|
32
|
Gurevich EV, Tesmer JJG, Mushegian A, Gurevich VV. G protein-coupled receptor kinases: more than just kinases and not only for GPCRs. Pharmacol Ther 2011; 133:40-69. [PMID: 21903131 DOI: 10.1016/j.pharmthera.2011.08.001] [Citation(s) in RCA: 319] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 08/01/2011] [Indexed: 12/24/2022]
Abstract
G protein-coupled receptor (GPCR) kinases (GRKs) are best known for their role in homologous desensitization of GPCRs. GRKs phosphorylate activated receptors and promote high affinity binding of arrestins, which precludes G protein coupling. GRKs have a multidomain structure, with the kinase domain inserted into a loop of a regulator of G protein signaling homology domain. Unlike many other kinases, GRKs do not need to be phosphorylated in their activation loop to achieve an activated state. Instead, they are directly activated by docking with active GPCRs. In this manner they are able to selectively phosphorylate Ser/Thr residues on only the activated form of the receptor, unlike related kinases such as protein kinase A. GRKs also phosphorylate a variety of non-GPCR substrates and regulate several signaling pathways via direct interactions with other proteins in a phosphorylation-independent manner. Multiple GRK subtypes are present in virtually every animal cell, with the highest expression levels found in neurons, with their extensive and complex signal regulation. Insufficient or excessive GRK activity was implicated in a variety of human disorders, ranging from heart failure to depression to Parkinson's disease. As key regulators of GPCR-dependent and -independent signaling pathways, GRKs are emerging drug targets and promising molecular tools for therapy. Targeted modulation of expression and/or of activity of several GRK isoforms for therapeutic purposes was recently validated in cardiac disorders and Parkinson's disease.
Collapse
Affiliation(s)
- Eugenia V Gurevich
- Department of Pharmacology, Vanderbilt University, 2200 Pierce Avenue, Preston Research Building, Rm. 454, Nashville, TN 37232, United States.
| | | | | | | |
Collapse
|
33
|
Affiliation(s)
- Jesús Avila
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Nicolás Cabrera 1, Universidad Autónoma de Madrid, Campus, Cantoblanco, 28049 Madrid, Spain and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Valderrebollo 5, 28031 Madrid, Spain
| |
Collapse
|
34
|
Cheng S, Li L, He S, Liu J, Sun Y, He M, Grasing K, Premont RT, Suo WZ. GRK5 deficiency accelerates {beta}-amyloid accumulation in Tg2576 mice via impaired cholinergic activity. J Biol Chem 2010; 285:41541-8. [PMID: 21041302 PMCID: PMC3009881 DOI: 10.1074/jbc.m110.170894] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Revised: 10/24/2010] [Indexed: 12/25/2022] Open
Abstract
Membrane G protein-coupled receptor kinase 5 (GRK5) deficiency is linked to Alzheimer disease, yet its precise roles in the disease pathogenesis remain to be delineated. We have previously demonstrated that GRK5 deficiency selectively impairs desensitization of presynaptic M2 autoreceptors, which causes presynaptic M2 hyperactivity and inhibits acetylcholine release. Here we report that inactivation of one copy of Grk5 gene in transgenic mice overexpressing β-amyloid precursor protein (APP) carrying Swedish mutations (Tg2576 or APPsw) resulted in significantly increased β-amyloid (Aβ) accumulation, including increased Aβ(+) plaque burdens and soluble Aβ in brain lysates and interstitial fluid (ISF). In addition, secreted β-APP fragment (sAPPβ) also increased, whereas full-length APP level did not change, suggesting an alteration in favor of β-amyloidogenic APP processing in these animals. Reversely, perfusion of methoctramine, a selective M2 antagonist, fully corrected the difference between the control and GRK5-deficient APPsw mice for ISF Aβ. In contrast, a cholinesterase inhibitor, eserine, although significantly decreasing the ISF Aβ in both control and GRK5-deficient APPsw mice, failed to correct the difference between them. However, combining eserine with methoctramine additively reduced the ISF Aβ further in both animals. Altogether, these findings indicate that GRK5 deficiency accelerates β-amyloidogenic APP processing and Aβ accumulation in APPsw mice via impaired cholinergic activity and that presynaptic M2 hyperactivity is the specific target for eliminating the pathologic impact of GRK5 deficiency. Moreover, a combination of an M2 antagonist and a cholinesterase inhibitor may reach the maximal disease-modifying effect for both amyloid pathology and cholinergic dysfunction.
Collapse
Affiliation(s)
- Shaowu Cheng
- From the Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri 64128
| | - Longxuan Li
- From the Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri 64128
- the Department of Neurology, Guangdong Medical College Affiliated Hospital, Zhanjiang 524001, China
| | - Shuangteng He
- the Substance Abuse Research Laboratory, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri 64128
| | - Jun Liu
- From the Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri 64128
- the Department of Neurology, the Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510120, China
| | - Yuning Sun
- From the Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri 64128
| | - Minchao He
- From the Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri 64128
- The Department of Biochemistry and Molecular Biology, Ningxia Medical University, Yinchuan, Ningxia 750004, China, and
| | - Kenneth Grasing
- the Substance Abuse Research Laboratory, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri 64128
| | - Richard T. Premont
- the Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710
| | - William Z. Suo
- From the Laboratory for Alzheimer's Disease and Aging Research, Kansas City Veterans Affairs Medical Center, Kansas City, Missouri 64128
- the Departments of Neurology and
- Physiology, University of Kansas Medical College, Kansas City, Kansas 66170
| |
Collapse
|
35
|
Haga T. [G protein-coupled receptor kinase (GRK)]. Nihon Yakurigaku Zasshi 2010; 136:215-218. [PMID: 20948157 DOI: 10.1254/fpj.136.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
|
36
|
Nedi T, White PJ, Coupar IM, Irving HR. Tissue dependent differences in G-protein coupled receptor kinases associated with 5-HT4 receptor desensitization in the rat gastro-intestinal tract. Biochem Pharmacol 2010; 81:123-33. [PMID: 20836992 DOI: 10.1016/j.bcp.2010.09.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Revised: 08/31/2010] [Accepted: 09/02/2010] [Indexed: 12/12/2022]
Abstract
Desensitization of 5-HT(4) receptors is regulated by G-protein coupled receptor kinases (GRKs). However, the specific GRK(s) that regulates the desensitization of 5-HT(4) receptors in the in vivo setting is unknown. We investigated the in situ expression of 5-HT(4) receptors and the GRKs in the rat gastrointestinal tract using immunohistochemistry and their interaction using coimmunoprecipitation. 5-HT(4) receptors were expressed in the tunica muscularis mucosae of the oesophagus, longitudinal muscle, myenteric plexus, circular muscle, submucosal plexus and muscularis mucosae of both the proximal and distal colon. GRK2 was expressed in longitudinal muscle and occasionally in myenteric plexus whilst GRK5 showed limited expression in the nerve endings of the myenteric plexus and submucosal plexus of the colon. GRK3 was expressed in the tunica muscularis mucosae of the oesophagus, circular muscle, submucosal plexus and muscularis mucosae of the colon. GRK6 was expressed in the tunica muscularis mucosae of the oesophagus, longitudinal muscle, circular muscle, and muscularis mucosae of the colon. Stimulation of tunica muscularis mucosae of the oesophagus and distal colon using the 5-HT(4) receptor agonist, tegaserod, followed by analysis of the 5-HT(4) receptor antibody immunoprecipitate, revealed the coimmunoprecipitation of GRK6 with 5-HT(4) receptors in the tunica muscularis mucosae of oesophagus while GRK2 and GRK6 were coimmunoprecipitated with 5-HT(4) receptors in the distal colon. This study indicates that GRK6 may be involved in the regulation of the desensitization of 5-HT(4) receptors in the rat oesophagus whilst GRK2 and GRK6 may be involved in regulation of the desensitization of 5-HT(4) receptors in the distal colon.
Collapse
Affiliation(s)
- Teshome Nedi
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Vic 3052, Australia
| | | | | | | |
Collapse
|