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Gong Q, Li W, Ali T, Hu Y, Mou S, Liu Z, Zheng C, Gao R, Li A, Li T, Li N, Yu Z, Li S. eIF4E phosphorylation mediated LPS induced depressive-like behaviors via ameliorated neuroinflammation and dendritic loss. Transl Psychiatry 2023; 13:352. [PMID: 37978167 PMCID: PMC10656522 DOI: 10.1038/s41398-023-02646-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 10/25/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023] Open
Abstract
The translational defect has emerged as a common feature of neurological disorders. Studies have suggested that alterations between opposing and balanced synaptic protein synthesis and turnover processes could lead to synaptic abnormalities, followed by depressive symptoms. Further studies link this phenomenon with eIF4E and TrkB/BDNF signaling. However, the interplay between the eIF4E and TrkB/BDNF signaling in the presence of neuroinflammation is yet to be explored. To illuminate the role of eIF4E activities within LPS-induced neuroinflammation and depression symptomology, we applied animal behavioral, biochemical, and pharmacological approaches. In addition, we sought to determine whether eIF4E dysregulated activities correlate with synaptic protein loss via the TrkB/BDNF pathway. Our results showed that LPS administration induced depressive-like behaviors, accompanied by neuroinflammation, reduced spine numbers, and synaptic protein dysregulation. Concurrently, LPS treatment enhanced eIF4E phosphorylation and TrkB/BDNF signaling defects. However, eFT508 treatment rescued the LPS-elicited neuroinflammation and depressive behaviors, as well as altered eIF4E phosphorylation, synaptic protein expression, and TrkB/BDNF signaling. The causal relation of eIF4E with BDNF signaling was further explored with TrkB antagonist K252a, which could reverse the effects of eFT508, validating the interplay between the eIF4E and TrkB/BDNF signaling in regulating depressive behaviors associated with neuroinflammation via synaptic protein translational regulation. In conclusion, our results support the involvement of eIF4E-associated translational dysregulation in synaptic protein loss via TrkB/BDNF signaling, eventually leading to depressiven-like behaviors upon inflammation-linked stress.
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Affiliation(s)
- Qichao Gong
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Weifen Li
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
- Department of Infectious Diseases, Shenzhen Key Laboratory for Endogenous Infections, The 6th Affiliated Hospital of Shenzhen University Health Science Center. No 89, Taoyuan Road, Nanshan District, 518052, Shenzhen, China
| | - Tahir Ali
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Yue Hu
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Shengnan Mou
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Zizhen Liu
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Chengyou Zheng
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Ruyan Gao
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Axiang Li
- College of Forensic Medicine, Institute of Forensic Injury, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Tao Li
- College of Forensic Medicine, Institute of Forensic Injury, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Ningning Li
- Tomas Lindahl Nobel Laureate Laboratory, Precision Medicine Research Centre, The Seventh Affiliated Hospital of Sun Yat-sen University, 518107, Shenzhen, China
| | - Zhijian Yu
- Department of Infectious Diseases, Shenzhen Key Laboratory for Endogenous Infections, The 6th Affiliated Hospital of Shenzhen University Health Science Center. No 89, Taoyuan Road, Nanshan District, 518052, Shenzhen, China
| | - Shupeng Li
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China.
- Institute of Chemical Biology, Shenzhen Bay Laboratory, 518132, Shenzhen, China.
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada.
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Cheng J, Xia Y, Zhou C, Li X, Liu P. Proteomics and Phosphoproteomic Analysis to Identify Spleen of Takifugu rubripes Infected Cryptocaryon irritans. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2023; 25:291-313. [PMID: 37039930 DOI: 10.1007/s10126-023-10205-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Accepted: 03/15/2023] [Indexed: 04/12/2023]
Abstract
Takifugu rubripes is important commercially fish species in China and it is under serious threat from white spot disease (cyptocaryoniasis), which leads to heavy economic losses. In this study, we used proteomics and phosphoproteomic analysis to identify differentially abundant proteins in the spleen of T. rubripes infected with the Cryptocaryon irritans. We identified 5,307 proteins and 6,644 phosphorylated sites on 2,815 phosphoproteins using high-throughput proteomics analysis of the spleen of T. rubripes based on 26,421 unique peptides and 5,013 modified peptides, respectively. The 5,307 quantified host proteins, 40 were upregulated and 43 were downregulated in the infection group compared to the control group. Among the 2815 phosphoproteins, 44/120 were upregulated/downregulated, and 62/151 were upregulated/downregulated in the 6644 quantified phosphosites. Using the combination of Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analyses, screening for significantly different phosphoproteins, motif analysis and protein-protein interaction analysis, we ultimately identified three phosphorylated proteins (G-protein-signaling modulator 1-like, zinc finger protein 850-like, and histone H1-like) and three phosphorylated protein kinases (serine/threonine-protein kinase homolog isoform X2, mitogen-activated protein kinase 5-like, and protein kinase C theta type) as potential biomarkers for T. rubripes immune responses. We then screened the phosphorylation sites of these biomarker proteins for further verification. Based on our results, we speculate that phosphorylation modification of the phosphorylation sites is involved in the immunity of T. rubripes against C. irritans.
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Affiliation(s)
- Jianxin Cheng
- College of Life Science, Liaoning Normal University, Dalian, 116081, China
- Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, 52 Heishijiao Street, Dalian, 116023, China
| | - Yuqing Xia
- Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, 52 Heishijiao Street, Dalian, 116023, China
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, People's Republic of China
| | - Cheng Zhou
- College of Marine Technology and Environment, Dalian Ocean University, No.52, Heishijiao Road, Dalian, 116023, China
- Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, 52 Heishijiao Street, Dalian, 116023, China
| | - Xiaohao Li
- College of Marine Technology and Environment, Dalian Ocean University, No.52, Heishijiao Road, Dalian, 116023, China
- Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, 52 Heishijiao Street, Dalian, 116023, China
| | - Pengfei Liu
- College of Marine Technology and Environment, Dalian Ocean University, No.52, Heishijiao Road, Dalian, 116023, China.
- Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, 52 Heishijiao Street, Dalian, 116023, China.
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3
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Chen HH, Petty LE, North KE, McCormick JB, Fisher-Hoch SP, Gamazon ER, Below JE. OUP accepted manuscript. Hum Mol Genet 2022; 31:3191-3205. [PMID: 35157052 PMCID: PMC9476627 DOI: 10.1093/hmg/ddac039] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 01/17/2022] [Accepted: 01/18/2022] [Indexed: 11/17/2022] Open
Abstract
Type 2 diabetes is a complex, systemic disease affected by both genetic and environmental factors. Previous research has identified genetic variants associated with type 2 diabetes risk; however, gene regulatory changes underlying progression to metabolic dysfunction are still largely unknown. We investigated RNA expression changes that occur during diabetes progression using a two-stage approach. In our discovery stage, we compared changes in gene expression using two longitudinally collected blood samples from subjects whose fasting blood glucose transitioned to a level consistent with type 2 diabetes diagnosis between the time points against those who did not with a novel analytical network approach. Our network methodology identified 17 networks, one of which was significantly associated with transition status. This 822-gene network harbors many genes novel to the type 2 diabetes literature but is also significantly enriched for genes previously associated with type 2 diabetes. In the validation stage, we queried associations of genetically determined expression with diabetes-related traits in a large biobank with linked electronic health records. We observed a significant enrichment of genes in our identified network whose genetically determined expression is associated with type 2 diabetes and other metabolic traits and validated 31 genes that are not near previously reported type 2 diabetes loci. Finally, we provide additional functional support, which suggests that the genes in this network are regulated by enhancers that operate in human pancreatic islet cells. We present an innovative and systematic approach that identified and validated key gene expression changes associated with type 2 diabetes transition status and demonstrated their translational relevance in a large clinical resource.
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Affiliation(s)
- Hung-Hsin Chen
- Vanderbilt Genetics Institute and Division of Genetic Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Lauren E Petty
- Vanderbilt Genetics Institute and Division of Genetic Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Kari E North
- Department of Epidemiology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Joseph B McCormick
- The University of Texas Health Science Center at Houston (UTHealth) School of Public Health, Brownsville, TX 78520, USA
| | - Susan P Fisher-Hoch
- The University of Texas Health Science Center at Houston (UTHealth) School of Public Health, Brownsville, TX 78520, USA
| | - Eric R Gamazon
- Vanderbilt Genetics Institute and Division of Genetic Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Clare Hall, University of Cambridge, Cambridgeshire, UK
| | - Jennifer E Below
- To whom correspondence should be addressed. Tel: +1-615-343-1655;
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Zhang SF, Zhang K, Cheng HM, Lin L, Wang DZ. Comparative transcriptomics reveals colony formation mechanism of a harmful algal bloom species Phaeocystis globosa. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 719:137454. [PMID: 32114233 DOI: 10.1016/j.scitotenv.2020.137454] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/15/2020] [Accepted: 02/18/2020] [Indexed: 06/10/2023]
Abstract
Phaeocystis globosa is a major causative agent of harmful algal blooms in the global ocean, featuring a complex polymorphic life cycle alternating between free-living solitary cells and colonial cells. Colony is the dominant morphotype during P. globosa bloom. However, the underlying mechanism of colony formation is poorly understood. Here, we comprehensively compared global transcriptomes of P. globosa cells at four distinctive colony formation stages: free-living solitary cells, two cell-, four cell- and multi-cell colonies, under low (20 °C) and high (32 °C) temperatures, and characterized the genes involved in colony formation. Glycosaminoglycan (GAG) synthesis was enhanced while its degradation was decreased during colony formation, resulting in the accumulation of GAGs that are an essential substrate of the colony matrix. Nitrogen metabolism and glutamine synthesis were remarkably increased in the colonial cells, which provided precursors for GAG synthesis. Furthermore, cell defense and motility were down-regulated in the colonial cells, thereby conserving energy for GAG synthesis. Notably, high temperature led to decreased synthesis and increased degradation of GAGs, resulting in insufficient substrates to form the colony. Our study indicates that GAGs accumulation is critical for colony formation of P. globosa, but high temperature inhibits GAGs' accumulation and colony formation.
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Affiliation(s)
- Shu-Feng Zhang
- State Key Laboratory of Marine Environmental Science/College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
| | - Kun Zhang
- State Key Laboratory of Marine Environmental Science/College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
| | - Hua-Min Cheng
- State Key Laboratory of Marine Environmental Science/College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
| | - Lin Lin
- State Key Laboratory of Marine Environmental Science/College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
| | - Da-Zhi Wang
- State Key Laboratory of Marine Environmental Science/College of the Environment and Ecology, Xiamen University, Xiamen 361102, China; Key Laboratory of Marine Ecology & Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
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5
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Khan MA. Phosphorylation of translation initiation factor eIFiso4E promotes translation through enhanced binding to potyvirus VPg. J Biochem 2019; 165:167-176. [PMID: 30371907 DOI: 10.1093/jb/mvy091] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 10/28/2018] [Indexed: 12/13/2022] Open
Abstract
Interactions of phosphorylated eIFiso4E binding to VPg as a function of temperature and ionic strength were assessed employing fluorescence spectroscopic. Phosphorylation increased the binding affinity ∼3.5-fold between VPg and eIFiso4E under equilibrium conditions. Binding affinity of VPg for eIFiso4Ep correlates with the ability to enhance in vitro protein synthesis. Addition of VPg and eIFiso4Ep together to Dep WGE enhances the translation for both uncapped and capped mRNA. However, capped mRNA translation was inhibited with addition of eIFiso4Ep alone in dep WGE, suggesting that phosphorylation prevents the cap binding and favours the VPg binding to promotes translation. Temperature dependence showed that the phosphorylated form of the eIFiso4E is preferred for complex formation. A van't Hoff analysis reveals that eIFiso4Ep binding to VPg was enthalpy driven (ΔH = -43.9 ± 0.3 kJ.mol-1) and entropy-opposed (ΔS = -4.3 ± 0.1 J.mol-1K-1). Phosphorylation increased the enthalpic contributions ∼33% for eIFiso4Ep-VPg complex. The thermodynamic values and ionic strength dependence of binding data suggesting that phosphorylation increased hydrogen-bonding and decreased hydrophobic interactions, which leads to more stable complex formation and favour efficient viral translation. Overall these data correlate well with the observed translational data and provide more detailed information on the translational strategy of potyviruses.
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Affiliation(s)
- Mateen A Khan
- Department of Chemistry & Biochemistry, Hunter College of the City University of New York, 695 Park Ave, New York, USA.,Department of Life Sciences, College of Science and General Studies, Alfaisal University, Takhasusi Street, P.O. Box-50927, Riyadh, Saudi Arabia
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Protective role of Dihydromyricetin in Alzheimer's disease rat model associated with activating AMPK/SIRT1 signaling pathway. Biosci Rep 2019; 39:BSR20180902. [PMID: 30498091 PMCID: PMC6328867 DOI: 10.1042/bsr20180902] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 10/26/2018] [Accepted: 11/15/2018] [Indexed: 12/20/2022] Open
Abstract
The aim of the present study was to understand the possible role of the Dihydromyricetin (DHM) in Alzheimer's disease (AD) rat model through regulation of the AMPK/SIRT1 signaling pathway. Rats were divided into Sham group, AD group, AD + DHM (100 mg/kg) group and AD + DHM (200 mg/kg) group. The spatial learning and memory abilities of rats were assessed by Morris Water Maze. Then, the inflammatory cytokines expressions were determined by radioimmunoassay while expressions of AMPK/SIRT1 pathway-related proteins by Western blot; and the apoptosis of hippocampal cells was detected by TdT-mediated dUTP nick end labeling assay. AD rats had an extended escape latency with decreases in the number of platform crossings, the target quadrant residence time, as well as swimming speed, and the inflammatory cytokines in serum and hippocampus were significantly elevated but AMPK/SIRT1 pathway-related proteins were reduced. Meanwhile, the apoptosis of hippocampal cells was significantly up-regulated with decreased Bcl-2 and increased Bax, as compared with Sham rats (all P<0.05). After AD rats treated with 100 or 200 mg/kg of DHM, the above effects were significantly reversed, resulting in a completely opposite tendency, and especially with 200 mg/kg DHM treatment, the improvement of AD rats was more obvious. DHM exerts protective role in AD via up-regulation of AMPK/SIRT1 pathway to inhibit inflammatory responses and hippocampal cell apoptosis and ameliorate cognitive function.
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AMP-Activated Protein Kinase (AMPK)-Dependent Regulation of Renal Transport. Int J Mol Sci 2018; 19:ijms19113481. [PMID: 30404151 PMCID: PMC6274953 DOI: 10.3390/ijms19113481] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 10/26/2018] [Accepted: 10/30/2018] [Indexed: 02/06/2023] Open
Abstract
AMP-activated kinase (AMPK) is a serine/threonine kinase that is expressed in most cells and activated by a high cellular AMP/ATP ratio (indicating energy deficiency) or by Ca2+. In general, AMPK turns on energy-generating pathways (e.g., glucose uptake, glycolysis, fatty acid oxidation) and stops energy-consuming processes (e.g., lipogenesis, glycogenesis), thereby helping cells survive low energy states. The functional element of the kidney, the nephron, consists of the glomerulus, where the primary urine is filtered, and the proximal tubule, Henle's loop, the distal tubule, and the collecting duct. In the tubular system of the kidney, the composition of primary urine is modified by the reabsorption and secretion of ions and molecules to yield final excreted urine. The underlying membrane transport processes are mainly energy-consuming (active transport) and in some cases passive. Since active transport accounts for a large part of the cell's ATP demands, it is an important target for AMPK. Here, we review the AMPK-dependent regulation of membrane transport along nephron segments and discuss physiological and pathophysiological implications.
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Khan MA, Goss DJ. Kinetic analyses of phosphorylated and non-phosphorylated eIFiso4E binding to mRNA cap analogues. Int J Biol Macromol 2017; 106:387-395. [PMID: 28797816 DOI: 10.1016/j.ijbiomac.2017.08.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 07/24/2017] [Accepted: 08/04/2017] [Indexed: 01/23/2023]
Abstract
Phosphorylation of eukaryotic initiation factors was previously shown to interact with m7G cap and play an important role in the regulation of translation initiation of protein synthesis. To gain further insight into the phosphorylation process of plant protein synthesis, the kinetics of phosphorylated wheat eIFiso4E binding to m7G cap analogues were examined. Phosphorylation of wheat eIFiso4E showed similar kinetic effects to human eIF4E binding to m7-G cap. Phosphorylation of eIFiso4E decreased the kinetic rate (2-fold) and increased the dissociation rate (2-fold) as compared to non-phosphorylated eIFiso4E binding to both mono- and di-nucleotide analogues at 22°C. Phosphorylated and non-phosphorylated eIFiso4E-m7G cap binding rates were found to be independent of concentration, suggesting conformational changes were rate limiting. Rate constant for phosphorylated and non-phosphorylated eIFiso4E binding to m7-G cap increased with temperature. Phosphorylation of eIFiso4E decreased (2-fold) the activation energy for both m7-G cap analogues binding as compared to non-phosphorylated eIFiso4E. The reduced energy barrier for the formation of eIFiso4E-m7-G cap complex suggests a more stable platform for further initiation complex formation and possible means of adapting variety of environmental conditions. Furthermore, the formation of phosphorylated eIFiso4E-cap complex may contribute to modulation of the initiation of protein synthesis in plants.
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Affiliation(s)
- Mateen A Khan
- Department of Chemistry and Biochemistry, Hunter College of the City University of New York, New York, NY 10065, USA; Department of Life Sciences, College of Science and General Studies, Alfaisal University, Riyadh 11533, KSA, Saudi Arabia.
| | - Dixie J Goss
- Department of Chemistry and Biochemistry, Hunter College of the City University of New York, New York, NY 10065, USA.
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Puerarin promotes ABCA1-mediated cholesterol efflux and decreases cellular lipid accumulation in THP-1 macrophages. Eur J Pharmacol 2017; 811:74-86. [PMID: 28576406 DOI: 10.1016/j.ejphar.2017.05.055] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 05/25/2017] [Accepted: 05/29/2017] [Indexed: 12/19/2022]
Abstract
It was reported that puerarin decreases the total cholesterol, low-density lipoprotein cholesterol (LDL-C), triglyceride (TG) and increases high-density lipoprotein cholesterol (HDL-C) level, but the underlying mechanism is unclear. This study was designed to determine whether puerarin decreased lipid accumulation via up-regulation of ABCA1-mediated cholesterol efflux in THP-1 macrophage-derived foam cells. Our results showed that puerarin significantly promoted the expression of ATP-binding cassette transporter A1 (ABCA1) mRNA and protein via the AMP-activated protein kinase (AMPK)-peroxisome proliferator-activated receptor gamma (PPARγ)-liver X receptor-alpha (LXR-α) pathway and decreased cellular lipid accumulation in human THP-1 macrophage-derived foam cells. The miR-7 directly targeted 3' untranslated region of STK11 (Serine/Threonine Kinase 11), which activated the AMPK pathway. Transfection with miR-7 mimic significantly reduced STK11 expression in puerarin-treated macrophages, decreased the phosphorylation of AMPK, down-regulated the expression of the PPARγ-LXR-α-ABCA1 expression. Additionally, treatment with miR-7 decreased cholesterol efflux and increased cholesterol levels in THP-1 macrophage-derived foam cells. Our study demonstrates that puerarin promotes ABCA1-mediated cholesterol efflux and decreases intracellular cholesterol levels through the pathway involving miR-7, STK11, and the AMPK-PPARγ-LXR-α-ABCA1 cascade.
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