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Zhu M, Sun Y, Su Y, Guan W, Wang Y, Han J, Wang S, Yang B, Wang Q, Kuang H. Luteolin: A promising multifunctional natural flavonoid for human diseases. Phytother Res 2024; 38:3417-3443. [PMID: 38666435 DOI: 10.1002/ptr.8217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 04/06/2024] [Accepted: 04/14/2024] [Indexed: 07/12/2024]
Abstract
Natural products are closely associated with human health. Luteolin (LUT), a flavonoid polyphenolic compound, is widely found in fruits, vegetables, flowers, and herbs. It is noteworthy that LUT exhibits a variety of beneficial pharmacological properties and holds significant potential for clinical applications, particularly in antitumor, anti-convulsion, diabetes control, anti-inflammatory, neuroprotection, anti-oxidation, anti-cardiovascular, and other aspects. The potential mechanism of action has been partially elucidated, including the mediation of NF-κB, toll-like receptor, MAPK, Wnt/β-catenin, PI3K/Akt, AMPK/mTOR, and Nrf-2, among others. The review that aimed to comprehensively consolidate essential information on natural sources, pharmacological effects, therapeutic and preventive potential, as well as potential mechanisms of LUT. The objective is to establish a theoretical basis for the continued development and application of LUT.
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Affiliation(s)
- Mingtao Zhu
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
| | - Yanping Sun
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
| | - Yang Su
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
| | - Wei Guan
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
| | - Yu Wang
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
| | - Jianwei Han
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
| | - Shuang Wang
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
| | - Bingyou Yang
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
| | - Qiuhong Wang
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Haixue Kuang
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
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Greidinger D, Halperin R, Zemet R, Maixner N, Tirosh A. Somatic USP8 alteration affects the immune landscape of corticotroph pituitary adenomas- a pilot study. Hormones (Athens) 2024:10.1007/s42000-024-00569-4. [PMID: 38819743 DOI: 10.1007/s42000-024-00569-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 05/17/2024] [Indexed: 06/01/2024]
Abstract
INTRODUCTION Somatic mutations in ubiquitin-specific protease-8 (USP8), encoding a deubiquinating protein, are found in approximately 30% of corticotroph-derived pituitary adenomas (CPAs). Stratifin, a protein encoded by SFN, inhibits USP8 catalytic activity. USP8 has immunomodulating properties that have been demonstrated in non-tumoral diseases. METHODS We assessed the influence of USP8 on the immune landscape of CPA and validated this effect and its dependency on stratifin in large cohorts of non-pituitary tumors. We analyzed data of CPA samples (n = 20) and additional non-pituitary tumors from the TCGA database, using transcriptome signature-recognition algorithms. Immune tumor microenvironment (iTME) was compared both by USP8 and SFN expression levels (n = 843) and by USP8 mutation status and SFN expression (n = 12,389). RESULTS CPA with activating USP8 mutations was associated with "cold" iTME compared with wild-type USP8 CPA, as reflected by lower fractions of immune cells, including B cells, CD4, regulatory and gamma/delta T cells, natural killer cells, M0 and M1 macrophages, dendritic cells, and eosinophils (p < 0.05 for all comparisons). Pathways altered by the presence of USP8 mutation, based on the most differentially expressed genes (3061 genes), included microglia pathogen phagocytosis and multiple toll-like receptor signaling pathways (p < 0.0001). In a validation analysis based on large cohorts of non-pituitary tumors, high expression of USP8 was associated with a suppressed iTME effect that was augmented by a low SFN expression. CONCLUSIONS Our data demonstrate for the first time, to our knowledge, a distinct immune landscape of tumors based on USP8 status and expression and the dependency of this immunological effect on SFN expression.
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Affiliation(s)
- Dahlia Greidinger
- Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
- Internal Medicine I, Tel HaShomer, Israel
| | - Reut Halperin
- Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
- ENTIRE - Endocrine Neoplasia Translational Research Center, Research Center for Endocrinology, Diabetes and Metabolism, The Chaim Sheba Medical Center, Tel HaShomer , Israel
| | - Roni Zemet
- Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
- Department of Obstetrics and Gynecology, Tel HaShomer, Israel
| | - Nitzan Maixner
- Cancer Center at Chaim Sheba Medical Center, Tel HaShomer, Israel
| | - Amit Tirosh
- Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel.
- ENTIRE - Endocrine Neoplasia Translational Research Center, Research Center for Endocrinology, Diabetes and Metabolism, The Chaim Sheba Medical Center, Tel HaShomer , Israel.
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Bi W, Bao K, Zhou X, Deng Y, Li X, Zhang J, Lan X, Zhao J, Lu D, Xu Y, Cen Y, Cao R, Xu M, Zhong W, Zhu L. PSMC5 regulates microglial polarization and activation in LPS-induced cognitive deficits and motor impairments by interacting with TLR4. J Neuroinflammation 2023; 20:277. [PMID: 38001534 PMCID: PMC10668523 DOI: 10.1186/s12974-023-02904-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/23/2023] [Indexed: 11/26/2023] Open
Abstract
Luteolin is a flavonoid found in high concentrations in celery and green pepper, and acts as a neuroprotectant. PSMC5 (proteasome 26S subunit, ATPase 5) protein levels were reduced after luteolin stimulation in activated microglia. We aimed to determine whether regulating PSMC5 expression could inhibit neuroinflammation, and investigate the underlying mechanisms.BV2 microglia were transfected with siRNA PSMC5 before the addition of LPS (lipopolysaccharide, 1.0 µg/ml) for 24 h in serum free DMEM. A mouse model of LPS-induced cognitive and motor impairment was established to evaluate the neuroprotective effects of shRNA PSMC5. Intracerebroventricular administration of shRNA PSMC5 was commenced 7 days prior to i.p. injection of LPS (750 μg/kg). Treatments and behavioral experiments were performed once daily for 7 consecutive days. Behavioral tests and pathological/biochemical assays were performed to evaluate LPS-induced hippocampal damage. Molecular dynamics simulation was used to confirm the interaction between PSMC5 and TLR4 (Toll-like receptor 4) in LPS-stimulated BV2 microglia. SiRNA PSMC5 inhibited BV2 microglial activation, and suppressed the release of inflammatory factors (IL-1β, COX-2, PGE2, TNF-α, and iNOS) upon after LPS stimulation in BV2 microglia. LPS increased IκB-α and p65 phosphorylation, which was attenuated by siRNA PSMC5. Behavioral tests and pathological/biochemical assays showed that shRNA PSMC5 attenuated LPS-induced cognitive and motor impairments, and restored synaptic ultrastructure and protein levels in mice. ShRNA PSMC5 reduced pro-inflammatory cytokine (TNF-α, IL-1β, PGE2, and NO) levels in the serum and brain, and relevant protein factors (iNOS and COX-2) in the brain. Furthermore, shRNA PSMC5 upregulated the anti-inflammatory mediators interleukin IL-4 and IL-10 in the serum and brain, and promoted a pro-inflammation-to-anti-inflammation phenotype shift in microglial polarization. Mechanistically, shRNA PSMC5 significantly alleviated LPS-induced TLR4 expression. The polarization of LPS-induced microglial pro-inflammation phenotype was abolished by TLR4 inhibitor and in the TLR-4-/- mouse, as in shRNA PSMC5 treatment. PSMC5 interacted with TLR4 via the amino sites Glu284, Met139, Leu127, and Phe283. PSMC5 site mutations attenuated neuroinflammation and reduced pro-inflammatory factors by reducing TLR4-related effects, thereby reducing TLR4-mediated MyD88 (myeloid differentiation factor 88)-dependent activation of NF-κB. PSMC5 could be an important therapeutic target for treatment of neurodegenerative diseases involving neuroinflammation-associated cognitive deficits and motor impairments induced by microglial activation.
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Affiliation(s)
- Wei Bi
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
- Clinical Neuoscience Institute, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Keyao Bao
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Xinqi Zhou
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Yihui Deng
- Central Laboratory of the First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Xiaoting Li
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Jiawei Zhang
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Xin Lan
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Jiayi Zhao
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Daxiang Lu
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Yezi Xu
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Yanmei Cen
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Rui Cao
- Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Avenue, Guangzhou, 510630, China
| | - Mengyang Xu
- Department of Biology, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China
| | - Wenbin Zhong
- Department of Biology, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China.
| | - Lihong Zhu
- Department of Pathophysiology, School of Medicine, Jinan University, No. 601, West Huangpu Avenue, Guangzhou, 510632, China.
- Guangzhou Key Laboratory for Germ-free Animals and Microbiota Application, No. 601, West Huangpu Avenue, Guangzhou, 510632, China.
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Liu X, Moussa C. Regulatory Role of Ubiquitin Specific Protease-13 (USP13) in Misfolded Protein Clearance in Neurodegenerative Diseases. Neuroscience 2021; 460:161-166. [PMID: 33577955 DOI: 10.1016/j.neuroscience.2021.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 02/02/2021] [Accepted: 02/03/2021] [Indexed: 12/14/2022]
Abstract
Ubiquitin Specific Protease (USP)-13 is a de-ubiquitinase member of the cysteine-dependent protease superfamily that cleaves ubiquitin off protein substrates to reverse ubiquitin-mediated protein degradation. Several findings implicate USPs in neurodegeneration. Ubiquitin targets proteins to major degradation pathways, including the proteasome and the lysosome. In melanoma cells, USP13 regulates the degradation of several proteins primarily via ubiquitination and de-ubiquitination. However, the significance of USP13 in regulating protein clearance in neurodegeneration is largely unknown. This mini-review summarizes the most recent evidence pertaining to the role of USP13 in protein clearance via autophagy and the proteasome in neurodegenerative diseases.
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Affiliation(s)
- Xiaoguang Liu
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Building D, Room 265, 4000 Reservoir Road, NW, Washington DC 20057, USA.
| | - Charbel Moussa
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Building D, Room 265, 4000 Reservoir Road, NW, Washington DC 20057, USA.
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Ekova MR, Smirnov AV, Tyurenkov IN, Grigor'eva NV. Peculiarities of the Expression of Inducible NO Synthase in Rat Dentate Gyrus in Depression Modeling. Bull Exp Biol Med 2020; 169:718-720. [PMID: 32990853 DOI: 10.1007/s10517-020-04963-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Indexed: 10/23/2022]
Abstract
Mild stress exposure contributes to the development of cognitive and emotional deficits, is considered as a model of depressive state, and is characterized by enhanced NO production. In albino mature (12-month-old) male rats, the depressive state was simulated by daily 30-min exposure to stressful stimuli (vibration, loud sound, and strobe light) over 7 days in a special chamber. On paraffin frontal sections of the brain stained with antibodies against inducible NO synthase (iNOS), the expression and distribution pattern of immunoreactive material were evaluated in various layers of the dentate gyrus under normal conditions and after depression modeling. The relative area of iNOS expression in the dentate gyrus of control rats was 8.2 (7.1-9.9)%, while in rats with experimental depression, this parameter was 16.7 (10.5-22.1)%, i.e. increased by 8.5% (p<0.05). In mature rats with modeled depressive state, the expression and relative area of iNOS expression in neuronal perikarya in the granular and subgranular layers of the dentate gyrus increased, which can underlie the mechanisms of damage and determine reduced neuroplasticity and suppressed neurogenesis in the dentate gyrus in rats during adulthood.
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Affiliation(s)
- M R Ekova
- Volgograd State Medical University, the Ministry of Health of Russian Federation, Volgograd, Russia.
| | - A V Smirnov
- Volgograd State Medical University, the Ministry of Health of Russian Federation, Volgograd, Russia.,Volgograd Medical Research Center, Volgograd, Russia
| | - I N Tyurenkov
- Volgograd State Medical University, the Ministry of Health of Russian Federation, Volgograd, Russia
| | - N V Grigor'eva
- Volgograd State Medical University, the Ministry of Health of Russian Federation, Volgograd, Russia
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Zhao J, Bi W, Zhang J, Xiao S, Zhou R, Tsang CK, Lu D, Zhu L. USP8 protects against lipopolysaccharide-induced cognitive and motor deficits by modulating microglia phenotypes through TLR4/MyD88/NF-κB signaling pathway in mice. Brain Behav Immun 2020; 88:582-596. [PMID: 32335193 DOI: 10.1016/j.bbi.2020.04.052] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 11/16/2022] Open
Abstract
Ubiquitin-specific protease 8 (USP8) regulates inflammation in vitro; however, the mechanisms by which USP8 inhibits neuroinflammation and its pathophysiological functions are not completely understood. In this study, we aimed to determine whether USP8 exerts neuroprotective effects in a mouse model of lipopolysaccharide (LPS)-induced cognitive and motor impairment. We commenced intracerebroventricular USP8 administration 7 days prior to i.p. injection of LPS (750 μg/kg). All treatments and behavioral experiments were performed once per day for 7 consecutive days. Behavioral tests and pathological/biochemical assays were performed to evaluate LPS-induced hippocampal damage. USP8 attenuated LPS-induced cognitive and motor impairments in mice. Moreover, USP8 downregulated several pro-inflammatory cytokines [nitric oxide (NO), tumor necrosis factor α (TNF-α), prostaglandin E2 (PGE2), and interleukin-1β (IL-1β)] in the serum and brain, and the relevant protein factors [inducible nitric oxide synthase (iNOS) and cyclooxygenase 2 (COX-2)] in the brain. Furthermore, USP8 upregulated the anti-inflammatory mediators interleukin (IL)-4 and IL-10 in the serum and brain, and promoted a shift from pro-inflammatory to anti-inflammatory microglial phenotypes. The LPS-induced microglial pro-inflammatory phenotype was abolished by TLR4 inhibitor and in TLR4-/- mice; these effects were similar to those of USP8 treatment. Mechanistically, we found that USP8 increased the expression of neuregulin receptor degradation protein-1 (Nrdp1), potently downregulated the expression of TLR4 and myeloid differentiation primary response protein 88 (MyD88) protein, and inhibited the phosphorylation of IκB kinase (IKK) β and kappa B-alpha (IκBα), thereby reducing nuclear translocation of p65 by inhibiting the activation of the nuclear factor-kappaB (NF-κB) signaling pathway in LPS-induced mice. Our results demonstrated that USP8 exerts protective effects against LPS-induced cognitive and motor deficits in mice by modulating microglial phenotypes via TLR4/MyD88/NF-κB signaling.
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Affiliation(s)
- JiaYi Zhao
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong Province 510632, China
| | - Wei Bi
- Department of Neurology, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong Province 510630, China
| | - JiaWei Zhang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong Province 510632, China
| | - Shu Xiao
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong Province 510632, China
| | - RuiYi Zhou
- Department of Neurology, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong Province 510630, China
| | - Chi Kwan Tsang
- Clinical Neuoscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province 510630, China
| | - DaXiang Lu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong Province 510632, China
| | - Lihong Zhu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong Province 510632, China.
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Bi W, Lan X, Zhang J, Xiao S, Cheng X, Wang H, Lu D, Zhu L. USP8 ameliorates cognitive and motor impairments via microglial inhibition in a mouse model of sepsis-associated encephalopathy. Brain Res 2019; 1719:40-48. [PMID: 31075263 DOI: 10.1016/j.brainres.2019.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/29/2019] [Accepted: 05/06/2019] [Indexed: 02/08/2023]
Abstract
Sepsis-associated encephalopathy (SAE) is a common and serious complication of sepsis, which is thought to be caused by neuroinflammation. In our previous study, ubiquitin-specific protease 8 (USP8), was reported to regulate inflammation in vitro. In the current study, we investigated whether increased USP8 expression would ameliorate the cognitive and motor impairments induced by cecal ligation and puncture (CLP) in mice, a model of SAE. Male adult mice were randomly divided into four groups: control, sham, CLP, and CLP + USP8 groups. The CLP + USP8 mice showed reduced weight loss on day 4 post-CLP, with a slight increase noted on day 7. The mortality rate in the CLP group was 70% 48 h after CLP; however, USP8 significantly improved survival after CLP. USP8 modulated the neurobehavioral scores in CLP mice. Our results also indicate that USP8 attenuated the CLP-induced cognitive and motor impairments, based on the performance of mice in the Morris water maze (MWM), pole-climbing, and wire suspension tests. USP8 suppressed the release of pro-inflammatory mediators, including prostaglandin E2(PGE2) in the serum and nitric oxide (NO) in brain tissue, as well as levels of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2) in brain tissue. Immunofluorescence experiments revealed that USP8 inhibited CLP-induced increases in microglial size and density in the hippocampus, and protected hippocampal neurons. Our findings indicate that neuroinflammation occurs in the brains of CLP mice, and that USP8 exerts protective effects against CLP-induced neuroinflammation and cognitive and motor impairments, which may aid in the development of novel therapeutic strategies for SAE.
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Affiliation(s)
- Wei Bi
- Department of Neurology, The First Affiliated Hospital of Jinan University, Guangzhou 510630, PR China
| | - Xin Lan
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - JiaWei Zhang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - Shu Xiao
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - XiaoFeng Cheng
- Department of Neurology, The First Affiliated Hospital of Jinan University, Guangzhou 510630, PR China
| | - HuaDong Wang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - DaXiang Lu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China
| | - Lihong Zhu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, PR China.
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Liu X, Hebron M, Shi W, Lonskaya I, Moussa CEH. Ubiquitin specific protease-13 independently regulates parkin ubiquitination and alpha-synuclein clearance in alpha-synucleinopathies. Hum Mol Genet 2019; 28:548-560. [PMID: 30329047 DOI: 10.1093/hmg/ddy365] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 10/09/2018] [Indexed: 12/22/2022] Open
Abstract
Ubiquitin specific proteases (USPs) are de-ubiquitinases (DUBs) that control protein ubiquitination cycle. The role of DUBs is poorly understood in neurodegenerative diseases. We found that USP13 is overexpressed in post-mortem Parkinson's disease (PD) brains. We investigated whether changes in USP13 levels can affect two molecules, parkin and alpha-synuclein, that are implicated in PD pathogenesis. Parkin is an E3 ubiquitin ligase that is regulated by ubiquitination and targets certain proteins for degradation, and alpha-synuclein may be ubiquitinated and recycled in the normal brain. We found that USP13 independently regulates parkin and alpha-synuclein ubiquitination in models of alpha-synucleinopathies. USP13 shRNA knockdown increases alpha-synuclein ubiquitination and clearance, in a parkin-independent manner. Furthermore, USP13 overexpression counteracts the effects of a tyrosine kinase inhibitor, Nilotinib, while USP13 knockdown facilitates Nilotinib effects on alpha-synculein clearance, suggesting that alpha-synuclein ubiquitnation is important for its clearance. These studies provide novel evidence of USP13 effects on parkin and alpha-synuclein metabolism and suggest that USP13 is a potential therapeutic target in the alpha-synucleinopathies.
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Affiliation(s)
- Xiaoguang Liu
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
| | - Michaeline Hebron
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
| | - Wangke Shi
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
| | - Irina Lonskaya
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
| | - Charbel E-H Moussa
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
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Liu X, Hebron ML, Mulki S, Wang C, Lekah E, Ferrante D, Shi W, Kurd-Misto B, Moussa C. Ubiquitin Specific Protease 13 Regulates Tau Accumulation and Clearance in Models of Alzheimer's Disease. J Alzheimers Dis 2019; 72:425-441. [PMID: 31594232 DOI: 10.3233/jad-190635] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ubiquitin Specific Protease-13 (USP13) is a de-ubiquinating enzyme that regulates protein ubiquitination and clearance. The role of USP13 is largely unknown in neurodegeneration. In this study we aim to demonstrate whether tau accumulation and/or clearance depends on ubiquitination/de-ubiquitination via USP-13. We used transgenic animal models of human amyloid precursor protein (APP) or P301L tau mutations and genetically knocked-down USP13 expression via shRNA to determine USP13 effects on tau ubiquitination and levels. We found a two-fold increase of USP13 levels in postmortem Alzheimer's disease (AD) brains. USP13 knockdown significantly increased the activity of the 20S proteasome and reduced the levels of hyper-phosphorylated tau (p-tau) in primary cortical neurons. USP13 knockdown also reduced the levels of amyloid and increased p-tau ubiquitination and clearance in transgenic animal models that overexpress murine tau as a result of the expression of familial APP mutations (TgAPP) and the human mutant P301L tau (rTg4510), respectively. Clearance of p-tau appears to be mediated by autophagy in these animal models. Taken together, these data suggest that USP13 knockdown reduces p-tau accumulation via regulation of ubiquitination/de-ubiquitination and mediates its clearance via autophagy and/or the proteasome. These results suggest that USP13 inhibition may be a therapeutic strategy to reduce accumulation of plaques and toxic p-tau in AD and human tauopathies.
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Affiliation(s)
- Xiaoguang Liu
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
| | - Michaeline L Hebron
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
| | - Sanjana Mulki
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
| | - Chen Wang
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
| | - Elizabeth Lekah
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
| | - Dalila Ferrante
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
| | - Wangke Shi
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
| | - Bahjat Kurd-Misto
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
| | - Charbel Moussa
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
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Zhang Y, Luo Y, Wang Y, Liu H, Yang Y, Wang Q. Effect of deubiquitinase USP8 on hypoxia/reoxygenation‑induced inflammation by deubiquitination of TAK1 in renal tubular epithelial cells. Int J Mol Med 2018; 42:3467-3476. [PMID: 30221684 DOI: 10.3892/ijmm.2018.3881] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 09/04/2018] [Indexed: 11/06/2022] Open
Abstract
Intermittent hypoxia/reoxygenation (IHR), characterized by repeated episodes of hypoxia interspersed with periods of reoxygenation, has been found to induce pro‑inflammatory cytokine production and is increasingly recognized as a major pathophysiological factor in various disease processes with distinct cell and molecular responses. The present study is the first, to the best of our knowledge, to investigate the effects of ubiquitin‑specific peptidase 8 (USP8) on IHR‑induced inflammation in renal tubular epithelial cells and examine the underlying mechanism. Following transfection of plasmids, HK‑2 and TCMK‑1 cells were incubated for eight cycles of IHR treatment including 3 h of hypoxic incubation followed by 3 h of normoxic culture. It was demonstrated that the expression of USP8 was decreased in IHR conditions but not in normoxic or continuous hypoxic conditions. In addition, IHR‑induced inflammation was suppressed in USP8‑overexpressinh renal tubular epithelial cells, and the silencing of USP8 markedly aggravated inflammation. Furthermore, it was found that the overexpression of USP8 inhibited the IHR‑induced activation of nuclear factor‑κB and it was demonstrated that USP8 interacted with transforming growth factor‑β‑activated kinase‑1 (TAK1) and deubiquitinated the K63‑linked ubiquitination of TAK1. Taken together, the results demonstrated the role of USP8 in IHR‑induced inflammation and suggested USP8 as a potential and specific therapeutic target for IHR‑related diseases.
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Affiliation(s)
- Yuwei Zhang
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Yingquan Luo
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Yina Wang
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Hong Liu
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Yu Yang
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Qiong Wang
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
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Inhibition of iNOS alleviates cognitive deficits and depression in diabetic mice through downregulating the NO/sGC/cGMP/PKG signal pathway. Behav Brain Res 2017; 322:70-82. [DOI: 10.1016/j.bbr.2016.12.046] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 12/30/2016] [Accepted: 12/31/2016] [Indexed: 12/21/2022]
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12
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Zhang Y, Su L, Zhang K. Transcriptional Effects of E3 Ligase Nrdp1 on Hypertrophy in Neonatal Rat Cardiomyocytes by Microarray and Integrated Gene Network Analysis. Cardiology 2016; 135:203-215. [DOI: 10.1159/000447235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 05/26/2016] [Indexed: 11/19/2022]
Abstract
Objective: Neuregulin receptor degradation protein-1 (Nrdp1) is a novel E3 ubiquitin ligase, and we have previously shown that overexpression of Nrdp1 increased cardiomyocyte injury. However, the role of Nrdp1 in myocardial hypertrophy is unclear. In the present study, we clarified the molecular mechanisms of angiotensin II (Ang II)-induced cardiomyocyte hypertrophy regulated by Nrdp1 based on genome-wide transcriptional analysis. Methods: Neonatal rat cardiomyocytes were infected with adenoviruses containing green fluorescent protein (Ad-GFP) or wild-type Nrdp1 (Ad-Nrdp1), and then treated with Ang II for 36 h. Detection of differentially expressed genes was achieved with an Affymetrix Rat Gene 2.0 Array and Cluster and Java TreeView software. Results and Conclusion: Microarray data analysis demonstrated that Nrdp1 overexpression affected the expression of 12,140 mRNA genes in Ang II-induced cardiomyocyte hypertrophy, including the upregulation of 12,044 and the downregulation of 96. Gene ontology and globe signal transduction network analysis showed that Nrdp1 affected the expression of many genes related to stimulus response, the cell receptor pathway, and cell growth. Pathway network analysis identified myocardial metabolism, DNA replication, and the cell cycle as the most important pathways targeted by Nrdp1. lncRNA-mRNA coexpression network analysis showed that two core lncRNAs, NONRATT057160 and NONRATT054243, were involved in cardiomyotrophy regulated by Nrdp1 in cardiomyocytes. Taken together, these data provide compelling clues for further exploration of the function of Nrdp1 in heart disease.
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YANG ZHAI, JIANG QIONG, CHEN SHUANGXI, HU CHENGLIANG, SHEN HUIFAN, HUANG PEIZHI, XU JUNPING, MEI JINPING, ZHANG BENPING, ZHAO WEIJIANG. Differential changes in Neuregulin-1 signaling in major brain regions in a lipopolysaccharide-induced neuroinflammation mouse model. Mol Med Rep 2016; 14:790-6. [PMID: 27220549 PMCID: PMC4918623 DOI: 10.3892/mmr.2016.5325] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 05/10/2016] [Indexed: 02/05/2023] Open
Abstract
Neuregulin 1 (Nrg1) is involved in multiple biological processes in the nervous system. The present study investigated changes in Nrg1 signaling in the major brain regions of mice subjected to lipopolysaccharide (LPS)-induced neuroinflammation. At 24 h post‑intraperitoneal injection of LPS, mouse brain tissues, including tissues from the cortex, striatum, hippocampus and hypothalamus, were collected. Reverse transcription‑polymerase chain reaction was used to determine the expression of Nrg1 and its receptors, Neu and ErbB4, at the mRNA level. Western blotting was performed to determine the levels of these proteins and the protein levels of phosphorylated extracellular signal-regulated kinases (Erk)1/2 and Akt1. Immunohistochemical staining was utilized to detect the levels of pNeu and pErbB4 in these regions. LPS successfully induced sites of neuroinflammation in these regions, in which changes in Nrg1, Neu and ErbB4 at the mRNA and protein levels were identified compared with controls. LPS induced a reduction in pNeu and pErbB4 in the striatum and hypothalamus, although marginally increased pErbB4 levels were found in the hippocampus. LPS increased the overall phosphorylation of Src but this effect was reduced in the hypothalamus. Moreover, increased phosphorylation of Akt1 was found in the striatum and hippocampus. These data suggest diverse roles for Nrg1 signaling in these regions during the process of neuroinflammation.
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Affiliation(s)
- ZHAI YANG
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - QIONG JIANG
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - SHUANG-XI CHEN
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - CHENG-LIANG HU
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - HUI-FAN SHEN
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - PEI-ZHI HUANG
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - JUN-PING XU
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - JIN-PING MEI
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, P.R. China
| | - BEN-PING ZHANG
- Department of Neurology, The 2nd Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - WEI-JIANG ZHAO
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
- Correspondence to: Dr Wei-Jiang Zhao, Center for Neuroscience, Shantou University Medical College, 22 Xinling Road, Shantou, Guangdong 515041, P.R. China, E-mail:
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Baune BT. Are Non-steroidal Anti-Inflammatory Drugs Clinically Suitable for the Treatment of Symptoms in Depression-Associated Inflammation? Curr Top Behav Neurosci 2016; 31:303-319. [PMID: 27405497 DOI: 10.1007/7854_2016_19] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The aetiology and pathophysiology of depression have long been associated with inflammation, at least in a proportion of patients. Altered cytokine activity in the periphery and in the brain has brought support to a concept of depression-associated inflammation. However, these immunological changes - and inflammation in particular - in depression have only been recently targeted for treatment. Non-steroidal anti-inflammatory drugs (NSAIDs) have been proposed to be of clinical use in the treatment of depression either as monotherapy or as adjuncts in combination with antidepressants. Specifically, selective cyclooxygenase (COX)-2 and non-selective COX inhibitor NSAIDs as adjuncts or monotherapy have been trialled clinically. A limited body of clinical research has been conducted with mixed results so far. Although meta-analyses appear to support the use of NSAIDs in acute depression, the overall effect is mainly biased by the effects of celecoxib for which the best evidence exists to date. Efficacy data of non-selective COX inhibitor NSAIDs on depressive symptoms is limited and out of six studies, only a retrospective analysis shows positive results for non-selective COX inhibitor. Clinical data on aspirin, an irreversible inhibitor of both COX-1 and COX-2, are mainly experimental and hypothetical at this stage, but may be promising in depressed patients with concomitant inflammatory conditions. The main problematic factor is that current evidence rests on trials in acute depression. Because of the dynamic nature of depression, it is important exploring if NSAIDs and other anti-inflammatory treatments may have a preventive role in early stages of depression and for relapse prevention. The possible impact of anti-inflammatory treatments on immune changes in different phases of depression warrants caution for a wide and preventive use of anti-inflammatory agents in depression-associated inflammation.
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Affiliation(s)
- Bernhard T Baune
- Discipline of Psychiatry, School of Medicine, University of Adelaide, Adelaide, SA, 5005, Australia.
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