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Wang S, Wei J, Li S, Luo Y, Li Y, Wang X, Shen W, Luo D, Liu D. PPA1, an energy metabolism initiator, plays an important role in the progression of malignant tumors. Front Oncol 2022; 12:1012090. [PMID: 36505776 PMCID: PMC9733535 DOI: 10.3389/fonc.2022.1012090] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 11/07/2022] [Indexed: 11/27/2022] Open
Abstract
Inorganic pyrophosphatase (PPA1) encoded by PPA1 gene belongs to Soluble Pyrophosphatases (PPase) family and is expressed widely in various tissues of Homo sapiens, as well as significantly in a variety of malignancies. The hydrolysis of inorganic pyrophosphate (PPi) to produce orthophosphate (Pi) not only dissipates the negative effects of PPi accumulation, but the energy released by this process also serves as a substitute for ATP. PPA1 is highly expressed in a variety of tumors and is involved in proliferation, invasion, and metastasis during tumor development, through the JNK/p53, Wnt/β-catenin, and PI3K/AKT/GSK-3β signaling pathways. Because of its remarkable role in tumor development, PPA1 may serve as a biological target for adjuvant therapy of tumor malignancies. Further, PPA1 is a potential biomarker to predict survival in patients with cancer, where the assessment of its transcriptional regulation can provide an in-depth understanding. Herein, we describe the signaling pathways through which PPA1 regulates malignant tumor progression and provide new insights to establish PPA1 as a biomarker for tumor diagnosis.
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Affiliation(s)
- Shuying Wang
- Department of Oncology, The Third Affiliated Hospital of Zunyi Medical University (The First People’s Hospital of Zunyi), Zunyi, China,College of Clinical Medicine, Zunyi Medical University, Zunyi, China
| | - Jianmei Wei
- Department of Clinical Pharmacy, The Third Affiliated Hospital of Zunyi Medical University (The First People' s Hospital of Zunyi), Zunyi, China
| | - Shunwei Li
- Department of Oncology, The Third Affiliated Hospital of Zunyi Medical University (The First People’s Hospital of Zunyi), Zunyi, China
| | - Yuyin Luo
- Department of Oncology, The Third Affiliated Hospital of Zunyi Medical University (The First People’s Hospital of Zunyi), Zunyi, China,College of Clinical Medicine, Zunyi Medical University, Zunyi, China
| | - Yifei Li
- College of Clinical Medicine, Jining Medical University, Jining, China
| | - Xianglin Wang
- Department of Oncology, The Third Affiliated Hospital of Zunyi Medical University (The First People’s Hospital of Zunyi), Zunyi, China,College of Clinical Medicine, Zunyi Medical University, Zunyi, China
| | - Wenzhi Shen
- Key Laboratory of Precision Oncology in Universities of Shandong, Institute of Precision Medicine, Jining Medical University, Jining, China,*Correspondence: Daishun Liu, ; Dehong Luo, ; Wenzhi Shen,
| | - Dehong Luo
- Department of Oncology, The Third Affiliated Hospital of Zunyi Medical University (The First People’s Hospital of Zunyi), Zunyi, China,*Correspondence: Daishun Liu, ; Dehong Luo, ; Wenzhi Shen,
| | - Daishun Liu
- College of Clinical Medicine, Zunyi Medical University, Zunyi, China,*Correspondence: Daishun Liu, ; Dehong Luo, ; Wenzhi Shen,
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Gene-gene interaction and new onset of major depressive disorder: Findings from a Chinese freshmen nested case-control study. J Affect Disord 2022; 300:505-510. [PMID: 34990634 DOI: 10.1016/j.jad.2021.12.138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/27/2021] [Accepted: 12/31/2021] [Indexed: 11/23/2022]
Abstract
BACKGROUND The gene-gene interaction is known to be the genetic cause of major depressive disorder (MDD). Several genes have been found to be related to MDD. The objectives of this study were to verify the susceptibility genes of MDD in a sample of university students in China, and to investigate possible gene-gene interactions in relation to the risk of MDD. METHODS 7,627 Chinese Han freshmen were enrolled at baseline survey in 2018. After a 2-year follow-up, 170 new onset MDD cases and 680 controls with DNA samples reserved were sequenced and genotyped for 4 selected Single Nucleotide Polymorphisms (SNPs) in a nested case-control study (ratio of 1:4). Chi-square test was used to identify the relationships between SNPs and risk of MDD. Generalized multifactor dimensionality reduction (GMDR) was used to analyze the gene-gene interactions. RESULTS The 2-year incidence of MDD in Chinese college students was 3.75% (95% CI: 3.24%, 4.34%). There was no statistical difference in MDD incidences between males (3.74%, 95% CI: 3.12%, 4.49%) and females (3.77%, 95% CI: 2.97%, 4.78%) (p>0.05). TMEM161B (rs768705) was positively associated with new onset MDD (χ2 = 0.75, p = 0.023). The AG genotype of rs768705 was significant (OR=1.640, 95%CI:1.414-2.358). The gene-gene interaction between TMEM161B (rs768705) and LHPP (rs35936514) was statistically significant in this nested case-control study (p = 0.011). The CV consistency was 9/10 and the testing accuracy was 0.5274. LIMITATIONS The results could not be inferred to other ethnics. CONCLUSIONS This study provided evidence that combined rs768705 (TMEM161B) and rs35936514 (LHPP) may modulate the risk of MDD.
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Chen P, Qu R, Peng W, Wang X, Huang K, He Y, Zhang X, Meng Y, Liu T, Chen J, Xie Y, Huang J, Hu Q, Geng J, Ying B. Visual and dual-fluorescence homogeneous sensor for the detection of pyrophosphatase in clinical hyperthyroidism samples based on selective recognition of CdTe QDs and coordination polymerization of Ce3+. JOURNAL OF MATERIALS CHEMISTRY C 2021. [DOI: 10.1039/d1tc00558h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A visual / dual fluorescent strategy based on selective recognition of QDs and coordination polymerization of Ce3+ was developed for pyrophosphatase detection.
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Hauser A, Hwang S, Sun H, Hackenberger CPR. Combining free energy calculations with tailored enzyme activity assays to elucidate substrate binding of a phospho-lysine phosphatase. Chem Sci 2020; 11:12655-12661. [PMID: 34094459 PMCID: PMC8163145 DOI: 10.1039/d0sc03930f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Studying enzymes that are involved in the regulation of dynamic post-translational modifications (PTMs) is of key importance in proteomics research. Such investigations can be particularly challenging when the modification itself is intrinsically labile. In this article, we elucidate the enzymatic activity of Phospholysine Phosphohistidine Inorganic Pyrophosphate Phosphatase (LHPP) towards different O- and N-phosphorylated peptides by a combined experimental and computational approach. LHPP has been previously described to hydrolyze the phosphoramidate bonds in different small molecule substrates, including phosphorylated lysine (pLys). Taking the instability of the phosphoramidate bond into account, we conducted a carefully adjusted enzymatic assay with various pLys pentapeptides to confirm enzymatic phosphatase activity with LHPP. Molecular docking was employed to explore possible binding poses of the substrates in complex with the enzyme. Molecular dynamics based free energy calculations, which are unique in their accuracy and solid theoretical basis, were further applied to predict relative binding affinity of different substrates. Comparison of simulations with experiments clearly suggested a distinct binding motif of pLys peptides as well as a very narrow promiscuity of LHPP. We believe this integrated approach can be widely adopted to study the structure and interaction of poorly characterized enzyme-substrate complexes, in particular with synthetically challenging or labile substrates.
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Affiliation(s)
- Anett Hauser
- Department of Chemical Biology II, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) Berlin Germany .,Institute for Chemistry, Humboldt-Universität zu Berlin Berlin Germany
| | - Songhwan Hwang
- Group of Structural Chemistry and Computational Biophysics, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) Berlin Germany
| | - Han Sun
- Group of Structural Chemistry and Computational Biophysics, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) Berlin Germany
| | - Christian P R Hackenberger
- Department of Chemical Biology II, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) Berlin Germany .,Institute for Chemistry, Humboldt-Universität zu Berlin Berlin Germany
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5
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Huang X, Jia J, Lin Y, Qiu B, Lin Z, Chen H. A Highly Sensitive Electrochemiluminescence Biosensor for Pyrophosphatase Detection Based on Click Chemistry-Triggered Hybridization Chain Reaction in Homogeneous Solution. ACS APPLIED MATERIALS & INTERFACES 2020; 12:34716-34722. [PMID: 32643920 DOI: 10.1021/acsami.0c10542] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The abnormal expression of pyrophosphatase (PPase) is closely related to many diseases and malignant tumors, so the detection for PPase is of great significance in clinical diagnosis, disease monitoring, and other biomedical aspects. In this study, a sensitive and specific electrochemiluminescence (ECL) biosensor combined highly specific Cu+-catalyzed azide-alkyne cycloaddition (CuAAC) with high efficiency of hybridization chain reaction (HCR) for the purpose of detecting pyrophosphatase has been designed. Highly efficient hybridization chain reaction amplification processed in homogeneous solution and the amplification products were connected to the electrode surface in one step, which solved the problem of low DNA amplification efficiency on the electrode surface because of the steric hindrance. Ru(phen)32+ was embedded into the dsDNA and functioned as ECL probes; the enhanced ECL intensity of the system had a linear relationship with the logarithm of PPase concentration in the range of 0.025-50 mU with a detection limit of 8 μU. The method was proved to be of good specificity, repeatability, and stability that could be used for screening and quantitatively determining pyrophosphatase inhibitor sodium fluoride. The practicability of this method in clinical application has been proved through the detection of serum from the clinical arthritis patients. Moreover, the method can be used to monitor PPase activity of arthritis patients before and after administration to provide reference for the effect of drug treatment.
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Affiliation(s)
- Xiaocui Huang
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Jinpeng Jia
- Department of Orthopaedics, General Hospital of Chinese People's Liberation Army, 28 Fuxing Road, Beijing 100853, China
| | - Yue Lin
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Bin Qiu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Zhenyu Lin
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Huixing Chen
- Department of Hepatobiliary Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian 350000, China
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Liao L, Duan D, Liu Y, Chen L. LHPP inhibits hepatocellular carcinoma cell growth and metastasis. Cell Cycle 2020; 19:1846-1854. [PMID: 32578511 DOI: 10.1080/15384101.2020.1783472] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Hepatocellular carcinoma (HCC) has a poor prognosis, owing to its high potential for growth and metastasis. In this study, we aimed to investigate the roles of Phospholysine Phosphohistidine Inorganic Pyrophosphate Phosphatase (LHPP)in human HCCcell growth and metastasis. We analyzed the LHPP expression level in human HCC tissues paired normal tissues in the Oncomine database, and assessed the relationship between the LHPP expression levels with HCC patient's overall survival and the prognostic value of LHPP in human HCC by Kaplan-Meier survival analysis. Real-time PCR and Western Blot were used to examine the expression levels of LHPP in normal liver cell line (LO2) and human HCC cell lines (SMCC-7721, HepG2, Huh7, MHCC-97 H, and LM3). Through lentivirus infection, we established human HCC stable cell lines (Huh7 and LM3) overexpressing LHPP. Then, we detected these cell viability, colony , and invasion. Subsequently, we performed the gene set enrichment analysis (GSEA) for the RNA-seq data of HCC patients from TCGA. Finally, we examined the expression level of several oncogenes, including CCNB1, PKM2, MMP7, and MMP9, in these cells via real-time PCR assay. Here, we found thatLHPPis significantly downregulated in the human HCC tissues paired normal tissues. Furthermore, the high expression level of LHPP is associated with better clinical outcomes in human HCC. Overexpression of LHPPinhibitscell growth and metastasis in human HCC cells, and LHPP expression levels negatively correlate with cell cycle and metastasis in HCC tissues. Moreover, the level of LHPP is negatively correlated with CCNB1, PKM2, MMP7, and MMP9 in human HCC cells and HCC tissues. These findings highlight a novel tumor suppressor in human HCC growth and metastasis, and provide a promising diagnostic and prognostic factor for humanHCC.
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Affiliation(s)
- Lijuan Liao
- Shenzhen Laboratory of Tumor Cell Biology, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, P. R. China.,University of Chinese Academy of Sciences , Beijing, P. R. China
| | - Deyu Duan
- Department of Clinical Laboratory, The Seventh Affiliated Hospital of Sun Yat-Sen University , Shenzhen, Guangdong, China
| | - Yanfeng Liu
- Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai, China
| | - Liang Chen
- Shenzhen Laboratory of Tumor Cell Biology, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, P. R. China.,University of Chinese Academy of Sciences , Beijing, P. R. China
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7
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Cui L, Wang F, Yin Z, Chang M, Song Y, Wei Y, Lv J, Zhang Y, Tang Y, Gong X, Xu K. Effects of the LHPP gene polymorphism on the functional and structural changes of gray matter in major depressive disorder. Quant Imaging Med Surg 2020; 10:257-268. [PMID: 31956547 DOI: 10.21037/qims.2019.12.01] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background A single-nucleotide polymorphism (SNP) of the LHPP gene (rs35936514) has been reported to be associated with major depressive disorder (MDD) in genome-wide association studies. However, the systems-level neural effects of rs35936514 that mediate the association are unknown. We hypothesized that variations in rs35936514 would be associated with structural and functional changes in gray matter (GM) at rest in MDD patients. Methods A total of 50 MDD patients and 113 healthy controls (HCs) were studied. Functional connectivity (FC) was analyzed by defining the bilateral hippocampus as the seed region. Voxel-based morphometry (VBM) was performed to assess the patterns of GM volume. The subjects were further divided into two groups: a CC homozygous group (CC; 24 MDD and 56 HC) and a risk T-allele carrier group (CT/TT genotypes; 26 MDD and 57 HC). A 2×2 analysis of variance (ANOVA: diagnosis × genotype) was used to determine the interaction effects and main effect (P<0.05). Results Significant diagnosis × genotype interaction effects on brain morphology and FC were noted. Compared to other subgroups, the MDD patients with the T allele showed an increased hippocampal FC in the bilateral calcarine cortex and cuneus and a decreased hippocampal FC in the right dorsolateral prefrontal cortex (DLPFC), bilateral anterior cingulate cortex (ACC), and medial prefrontal cortex (MPFC), in addition to reduced GM volume in the right DLPFC, bilateral temporal cortex, and posterior cingulate cortex (PCC). Conclusions LHPP gene polymorphisms may affect functional and structural changes in the GM at rest and may play an important role in the pathophysiological mechanisms of MDD.
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Affiliation(s)
- Lingling Cui
- Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Fei Wang
- Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Brain Function Research Sections, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Zhiyang Yin
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Brain Function Research Sections, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Miao Chang
- Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Brain Function Research Sections, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Yanzhuo Song
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Brain Function Research Sections, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Yange Wei
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Brain Function Research Sections, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Jing Lv
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Brain Function Research Sections, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Yifan Zhang
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Brain Function Research Sections, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Yanqing Tang
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Brain Function Research Sections, The First Affiliated Hospital of China Medical University, Shenyang 110001, China.,Department of Geriatrics, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - Xiaohong Gong
- State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Ke Xu
- Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang 110001, China
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8
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Cui L, Gong X, Chang M, Yin Z, Geng H, Song Y, Lv J, Feng R, Wang F, Tang Y, Xu K. Association of LHPP genetic variation (rs35936514) with structural and functional connectivity of hippocampal-corticolimbic neural circuitry. Brain Imaging Behav 2019; 14:1025-1033. [PMID: 31250265 DOI: 10.1007/s11682-019-00140-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A single nucleotide polymorphism at the LHPP gene (rs35936514) has been reported to be associated with major depressive disorder (MDD) in genome-wide association studies. We conducted a neuroimaging analysis to explore whether and which brain neural systems are affected by LHPP variation. Since LHPP variants seem to be associated with the hippocampus, we assessed the relationship between rs35936514 variation and structural-functional connectivity within a hippocampal-corticolimbic neural system implicated in MDD. A total of 122 Chinese subjects were divided into a CC homozygous group (CC genotype, n = 60) and a T allele-carrier group (CT/TT genotypes, n = 62). All subjects participated in resting-state functional magnetic resonance imaging (rs-fMRI) and diffusion tensor imaging (DTI) scans. Structural and functional connectivity data analyses were then performed. Compared to the CC group, the T allele-carrier group showed significantly higher fractional anisotropy (FA) values in the fornix as well as increased functional connectivity from the hippocampus to the rostral part of the anterior cingulate cortex (rACC). Moreover, a significant negative correlation between fornix FA value and hippocampus-rACC functional connectivity was identified (P < 0.05). These findings suggest that there is a relationship between rs35936514 variation and both structural and functional hippocampal-corticolimbic neural system involvement in MDD. LHPP may play an important role in the neuropathophysiology of MDD.
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Affiliation(s)
- Lingling Cui
- Department of Radiology, The First Affiliated Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, People's Republic of China
| | - Xiaohong Gong
- State Key Laboratory of Genetic Engineering and MOE key Laboratory of Contemporary Anthroology, School of Life Sciences, Fudan University, Shanghai, China
| | - Miao Chang
- Department of Radiology, The First Affiliated Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, People's Republic of China
| | - Zhiyang Yin
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Haiyang Geng
- Department of Radiology, The First Affiliated Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, People's Republic of China
| | - Yanzhuo Song
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Jing Lv
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Ruiqi Feng
- Department of Radiology, The First Affiliated Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, People's Republic of China
| | - Fei Wang
- Department of Radiology, The First Affiliated Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, People's Republic of China
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang, China
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
- The Research Institute for Brain Functional Imaging, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Yanqing Tang
- Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang, China.
- Department of Geriatrics and Psychiatry, The First Affiliated Hospital, China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, People's Republic of China.
| | - Ke Xu
- Department of Radiology, The First Affiliated Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, People's Republic of China.
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Tian Y, Hao L, Wang C, Yang X, Liu S. Quantum Dot Doping-Induced Photoluminescence for Facile, Label-Free, and Sensitive Pyrophosphatase Activity Assay and Inhibitor Screening. NANOMATERIALS 2019; 9:nano9010111. [PMID: 30669286 PMCID: PMC6359004 DOI: 10.3390/nano9010111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/14/2019] [Accepted: 01/15/2019] [Indexed: 12/19/2022]
Abstract
Development of simple, convenient, and sensitive assay methods for pyrophosphatase (PPase) activity is of importance, for disease diagnosis and drug discovery. Herein, a simple, rapid, label-free, and sensitive fluorescence sensor for PPase activity assay is developed, using Cu2+ doping-induced quantum dot (QD) photoluminescence as a signal reporter. The Cu2+ doping of ZnSe QD can induce a dopant-dependent emission response, which will be inhibited after the premixing of Cu2+ with pyrophosphate (PPi), to form a Cu2+-PPi complex. Then, the hydrolysis of PPi into phosphate (Pi), specifically catalyzed by PPase, liberates the free Cu2+ to regain the QD doping for the fluorescence response, which is highly dependent on the PPase activity. The PPase can be sensitively and selectively assayed, with a detection limit of 0.1 mU/mL. The developed sensing strategy can be also employed for the PPase inhibitor screening. Thus, the current QD doping-based sensing strategy offers an efficient and promising avenue for Cu2+, PPi, or PPase-related target analysis, and might hold great potential for the further applications in the clinical disease diagnosis.
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Affiliation(s)
- Yishen Tian
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Lijie Hao
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Chao Wang
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Xiaoyan Yang
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Shufeng Liu
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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Jung H, Shin SH, Kee J. Recent Updates on ProteinN‐Phosphoramidate Hydrolases. Chembiochem 2018; 20:623-633. [DOI: 10.1002/cbic.201800566] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Hoyoung Jung
- Department of ChemistryUlsan National Institute of Science and Technology (UNIST) Ulsan 44919 South Korea
| | - Son Hye Shin
- Department of ChemistryUlsan National Institute of Science and Technology (UNIST) Ulsan 44919 South Korea
| | - Jung‐Min Kee
- Department of ChemistryUlsan National Institute of Science and Technology (UNIST) Ulsan 44919 South Korea
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Combinational siRNA delivery using hyaluronic acid modified amphiphilic polyplexes against cell cycle and phosphatase proteins to inhibit growth and migration of triple-negative breast cancer cells. Acta Biomater 2018; 66:294-309. [PMID: 29183848 DOI: 10.1016/j.actbio.2017.11.036] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 11/05/2017] [Accepted: 11/21/2017] [Indexed: 12/22/2022]
Abstract
Triple-negative breast cancer is an aggressive form of breast cancer with few therapeutic options if it recurs after adjuvant chemotherapy. RNA interference could be an alternative therapy for metastatic breast cancer, where small interfering RNA (siRNA) can silence the expression of aberrant genes critical for growth and migration of malignant cells. Here, we formulated a siRNA delivery system using lipid-substituted polyethylenimine (PEI) and hyaluronic acid (HA), and characterized the size, ζ-potential and cellular uptake of the nanoparticulate delivery system. Higher cellular uptake of siRNA by the tailored PEI/HA formulation suggested better interaction of complexes with breast cancer cells due to improved physicochemical characteristics of carrier and HA-binding CD44 receptors. The siRNAs against specific phosphatases that inhibited migration of MDA-MB-231 cells were then identified using library screen against 267 protein-tyrosine phosphatases, and siRNAs to inhibit cell migration were further validated. We then assessed the combinational delivery of a siRNA against CDC20 to decrease cell growth and a siRNA against several phosphatases shown to decrease migration of breast cancer cells. Combinational siRNA therapy against CDC20 and identified phosphatases PPP1R7, PTPN1, PTPN22, LHPP, PPP1R12A and DUPD1 successfully inhibited cell growth and migration, respectively, without interfering the functional effect of the co-delivered siRNA. The identified phosphatases could serve as potential targets to inhibit migration of highly aggressive metastatic breast cancer cells. Combinational siRNA delivery against cell cycle and phosphatases could be a promising strategy to inhibit both growth and migration of metastatic breast cancer cells, and potentially other types of metastatic cancer. STATEMENT OF SIGNIFICANCE The manuscript investigated the efficacy of a tailored polymeric siRNA delivery system formulation as well as combinational siRNA therapy in metastatic breast cancer cells to inhibit malignant cell growth and migration. The siRNA delivery was undertaken by non-viral means with PEI/HA. We identified six phosphatases that could be critical targets to inhibit migration of highly aggressive metastatic breast cancer cells. We further report on specifically targeting cell cycle and phosphatase proteins to decrease both malignant cell growth and migration simultaneously. Clinical gene therapy against metastatic breast cancer with effective and safe delivery systems is urgently needed to realize the potential of molecular medicine in this deadly disease and our studies in this manuscript is intended to facilitate this endeavor.
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Fuhs SR, Hunter T. pHisphorylation: the emergence of histidine phosphorylation as a reversible regulatory modification. Curr Opin Cell Biol 2017; 45:8-16. [PMID: 28129587 DOI: 10.1016/j.ceb.2016.12.010] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 12/31/2016] [Indexed: 12/30/2022]
Abstract
Histidine phosphorylation is crucial for prokaryotic signal transduction and as an intermediate for several metabolic enzymes, yet its role in mammalian cells remains largely uncharted. This is primarily caused by difficulties in studying histidine phosphorylation because of the relative instability of phosphohistidine (pHis) and lack of specific antibodies and methods to preserve and detect it. The recent synthesis of stable pHis analogs has enabled development of pHis-specific antibodies and their use has started to shed light onto this important, yet enigmatic posttranslational modification. We are beginning to understand that pHis has broader roles in protein and cellular function including; cell cycle regulation, phagocytosis, regulation of ion channel activity and metal ion coordination. Two mammalian histidine kinases (NME1 and NME2), two pHis phosphatases (PHPT1 and LHPP), and a handful of substrates were previously identified. These new tools have already led to the discovery of an additional phosphatase (PGAM5) and hundreds of putative substrates. New methodologies are also being developed to probe the pHis phosphoproteome and determine functional consequences, including negative ion mode mass spectroscopy and unnatural amino acid incorporation. These new tools and strategies have the potential to overcome the unique challenges that have been holding back our understanding of pHis in cell biology.
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Affiliation(s)
- Stephen Rush Fuhs
- Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Tony Hunter
- Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
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13
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Relationship between the LHPP Gene Polymorphism and Resting-State Brain Activity in Major Depressive Disorder. Neural Plast 2016; 2016:9162590. [PMID: 27843651 PMCID: PMC5097818 DOI: 10.1155/2016/9162590] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/22/2016] [Accepted: 09/06/2016] [Indexed: 11/18/2022] Open
Abstract
A single-nucleotide polymorphism at the LHPP gene (rs35936514) has been reported in genome-wide association studies to be associated with major depressive disorder (MDD). However, the neural system effects of rs35936514 that mediate the association are unknown. The present work explores whether the LHPP rs35936514 polymorphism moderates brain regional activity in MDD. A total of 160 subjects were studied: a CC group homozygous for the C allele (23 individuals with MDD and 57 controls) and a T-carrier group carrying the high risk T allele (CT/TT genotypes; 22 MDD and 58 controls). All participants underwent resting-state functional magnetic resonance imaging (rs-fMRI) scanning. Brain activity was assessed using the amplitudes of low-frequency fluctuations (ALFF). MDD patients showed a significant increased ALFF in the left middle temporal gyrus and occipital cortex. The T-carrier group showed increased ALFF in the left superior temporal gyrus. Significant diagnosis × genotype interaction was noted in the bilateral lingual gyri, bilateral dorsal lateral prefrontal cortex (dlPFC), and left medial prefrontal cortex (mPFC) (P < 0.05, corrected). Results demonstrated that MDD patients with LHPP rs35936514 CT/TT genotype may influence the regional brain activity. These findings implicate the effects of the rs35936514 variation on the neural system in MDD.
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Zhao L, Zhao L, Miao Y, Liu C, Zhang C. Construction of a Turn Off-On-Off Fluorescent System Based on Competitive Coordination of Cu 2+ between 6,7-Dihydroxycoumarin and Pyrophosphate Ion for Sensitive Assay of Pyrophosphatase Activity. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2016; 2016:4306838. [PMID: 27766179 PMCID: PMC5059578 DOI: 10.1155/2016/4306838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 08/25/2016] [Accepted: 09/05/2016] [Indexed: 06/06/2023]
Abstract
The detection of pyrophosphatase (PPase) activity is of great significance in diagnosing diseases and understanding the function of PPase-related biological events. This study constructed a turn off-on-off fluorescent system for PPase activity assay based on PPase-regulated competitive coordination of Cu2+ between a water-soluble fluorescent probe 6,7-dihydroxycoumarin (DHC) and pyrophosphate (PPi). The probe DHC can coordinate with Cu2+ and consequently display on-off type fluorescence response. Furthermore, the in situ formed nonfluorescent Cu2+-DHC complex can act as an effective off-on type fluorescent probe for sensing PPi due to the higher coordination reactivity between Cu2+ and PPi than that between Cu2+ and DHC. The subsequent addition of PPase to the mixture containing Cu2+, DHC, and PPi leads to the fluorescence requenching of the system again (an off state) because PPase catalyzes the hydrolysis of PPi into orthophosphate in the reaction system. Under the optimum conditions, the decrease of the fluorescence intensity of DHC-Cu2+-PPi system was linear with the increase of the PPase activity in the range from 0.1 to 0.3 U. The detection limit was down to 0.028 U PPase (S/N = 3). Moreover, the as-established system was also applied to evaluate PPase inhibitor. This study offers a simple yet effective method for the detection of PPase activity.
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Affiliation(s)
- Lingzhi Zhao
- Department of Pharmacy, Xi'an Medical College, Xi'an 710021, China
- Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Liu Zhao
- Beijing Research Center of Agricultural Standards and Testing, Beijing 100097, China
| | - Yanqing Miao
- Department of Pharmacy, Xi'an Medical College, Xi'an 710021, China
| | - Chunye Liu
- Department of Pharmacy, Xi'an Medical College, Xi'an 710021, China
| | - Chenxiao Zhang
- Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
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15
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Deng HH, Wang FF, Shi XQ, Peng HP, Liu AL, Xia XH, Chen W. Water-soluble gold nanoclusters prepared by protein-ligand interaction as fluorescent probe for real-time assay of pyrophosphatase activity. Biosens Bioelectron 2016; 83:1-8. [DOI: 10.1016/j.bios.2016.04.031] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 04/09/2016] [Accepted: 04/11/2016] [Indexed: 12/19/2022]
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16
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Zhou Q, Lin Y, Xu M, Gao Z, Yang H, Tang D. Facile Synthesis of Enhanced Fluorescent Gold–Silver Bimetallic Nanocluster and Its Application for Highly Sensitive Detection of Inorganic Pyrophosphatase Activity. Anal Chem 2016; 88:8886-92. [DOI: 10.1021/acs.analchem.6b02543] [Citation(s) in RCA: 153] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Qian Zhou
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Youxiu Lin
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Mingdi Xu
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Zhuangqiang Gao
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Huanghao Yang
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Dianping Tang
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
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17
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Knowles EEM, Kent JW, McKay DR, Sprooten E, Mathias SR, Curran JE, Carless MA, de Almeida MAA, Harald HHG, Dyer TD, Olvera RL, Fox PT, Duggirala R, Almasy L, Blangero J, Glahn DC. Genome-wide linkage on chromosome 10q26 for a dimensional scale of major depression. J Affect Disord 2016; 191:123-31. [PMID: 26655122 PMCID: PMC4715913 DOI: 10.1016/j.jad.2015.11.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 10/27/2015] [Accepted: 11/09/2015] [Indexed: 12/28/2022]
Abstract
Major depressive disorder (MDD) is a common and potentially life-threatening mood disorder. Identifying genetic markers for depression might provide reliable indicators of depression risk, which would, in turn, substantially improve detection, enabling earlier and more effective treatment. The aim of this study was to identify rare variants for depression, modeled as a continuous trait, using linkage and post-hoc association analysis. The sample comprised 1221 Mexican-American individuals from extended pedigrees. A single dimensional scale of MDD was derived using confirmatory factor analysis applied to all items from the Past Major Depressive Episode section of the Mini-International Neuropsychiatric Interview. Scores on this scale of depression were subjected to linkage analysis followed by QTL region-specific association analysis. Linkage analysis revealed a single genome-wide significant QTL (LOD=3.43) on 10q26.13, QTL-specific association analysis conducted in the entire sample revealed a suggestive variant within an intron of the gene LHPP (rs11245316, p=7.8×10(-04); LD-adjusted Bonferroni-corrected p=8.6×10(-05)). This region of the genome has previously been implicated in the etiology of MDD; the present study extends our understanding of the involvement of this region by highlighting a putative gene of interest (LHPP).
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Affiliation(s)
- Emma E M Knowles
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA; Olin Neuropsychiatric Research Center, Institute of Living, Hartford Hospital, Hartford, CT, USA.
| | - Jack W Kent
- Department of Genetics, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - D Reese McKay
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA; Olin Neuropsychiatric Research Center, Institute of Living, Hartford Hospital, Hartford, CT, USA
| | - Emma Sprooten
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA; Olin Neuropsychiatric Research Center, Institute of Living, Hartford Hospital, Hartford, CT, USA
| | - Samuel R Mathias
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA; Olin Neuropsychiatric Research Center, Institute of Living, Hartford Hospital, Hartford, CT, USA
| | - Joanne E Curran
- South Texas Diabetes and Obesity Institute, University of Texas Health Science Center at San Antonio & University of Texas of the Rio Grande Valley, Brownsville, TX, United States
| | - Melanie A Carless
- Department of Genetics, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Marcio A A de Almeida
- South Texas Diabetes and Obesity Institute, University of Texas Health Science Center at San Antonio & University of Texas of the Rio Grande Valley, Brownsville, TX, United States
| | - H H Goring Harald
- South Texas Diabetes and Obesity Institute, University of Texas Health Science Center at San Antonio & University of Texas of the Rio Grande Valley, Brownsville, TX, United States
| | - Tom D Dyer
- South Texas Diabetes and Obesity Institute, University of Texas Health Science Center at San Antonio & University of Texas of the Rio Grande Valley, Brownsville, TX, United States
| | - Rene L Olvera
- Department of Psychiatry, University of Texas Health Science Center San Antonio, Texas Center San Antonio, San Antonio, TX, United States
| | - Peter T Fox
- Research Imaging Institute, University of Texas Health Science Center San Antonio, San Antonio, TX, United States; South Texas Veterans' Healthcare System, 7400 Merton Minter, San Antonio, TX 78229, USA
| | - Ravi Duggirala
- South Texas Diabetes and Obesity Institute, University of Texas Health Science Center at San Antonio & University of Texas of the Rio Grande Valley, Brownsville, TX, United States
| | - Laura Almasy
- South Texas Diabetes and Obesity Institute, University of Texas Health Science Center at San Antonio & University of Texas of the Rio Grande Valley, Brownsville, TX, United States
| | - John Blangero
- South Texas Diabetes and Obesity Institute, University of Texas Health Science Center at San Antonio & University of Texas of the Rio Grande Valley, Brownsville, TX, United States
| | - David C Glahn
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA; Olin Neuropsychiatric Research Center, Institute of Living, Hartford Hospital, Hartford, CT, USA
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18
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Zhu X, Liu J, Peng H, Jiang J, Yu R. A novel fluorescence assay for inorganic pyrophosphatase based on modulated aggregation of graphene quantum dots. Analyst 2016; 141:251-5. [DOI: 10.1039/c5an01937k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A simple and highly sensitive fluorometric method has been developed for inorganic pyrophosphatase (PPase) activity detection based on the disaggregation and aggregation of graphene quantum dots (GQDs).
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Affiliation(s)
- Xueli Zhu
- College of Chemistry and Chemical Engineering
- Hunan University
- State Key Laboratory for Chemo/Biosensing and Chemometrics
- Changsha
- China
| | - Jinwen Liu
- College of Chemistry and Chemical Engineering
- Hunan University
- State Key Laboratory for Chemo/Biosensing and Chemometrics
- Changsha
- China
| | - Haiyang Peng
- College of Chemistry and Chemical Engineering
- Hunan University
- State Key Laboratory for Chemo/Biosensing and Chemometrics
- Changsha
- China
| | - Jianhui Jiang
- College of Chemistry and Chemical Engineering
- Hunan University
- State Key Laboratory for Chemo/Biosensing and Chemometrics
- Changsha
- China
| | - Ruqin Yu
- College of Chemistry and Chemical Engineering
- Hunan University
- State Key Laboratory for Chemo/Biosensing and Chemometrics
- Changsha
- China
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19
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Lin Y, Zhou Q, Li J, Shu J, Qiu Z, Lin Y, Tang D. Magnetic Graphene Nanosheet-Based Microfluidic Device for Homogeneous Real-Time Electronic Monitoring of Pyrophosphatase Activity Using Enzymatic Hydrolysate-Induced Release of Copper Ion. Anal Chem 2015; 88:1030-8. [DOI: 10.1021/acs.analchem.5b04005] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Youxiu Lin
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Qian Zhou
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Juan Li
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Jian Shu
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Zhenli Qiu
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Yuping Lin
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
| | - Dianping Tang
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, People’s Republic of China
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20
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Zhang L, Li M, Qin Y, Chu Z, Zhao S. A convenient label free colorimetric assay for pyrophosphatase activity based on a pyrophosphate-inhibited Cu2+–ABTS–H2O2reaction. Analyst 2014; 139:6298-303. [DOI: 10.1039/c4an01415d] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Shipman M, Lubick K, Fouchard D, Gurram R, Grieco P, Jutila M, Dratz EA. Proteomic and systems biology analysis of the monocyte response to Coxiella burnetii infection. PLoS One 2013; 8:e69558. [PMID: 23990884 PMCID: PMC3749201 DOI: 10.1371/journal.pone.0069558] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 06/09/2013] [Indexed: 01/02/2023] Open
Abstract
Coxiella burnetii is an obligate intracellular bacterial pathogen and the causative agent of Q fever. Chronic Q fever can produce debilitating fatigue and C. burnetii is considered a significant bioterror threat. C. burnetii occupies the monocyte phagolysosome and although prior work has explained features of the host-pathogen interaction, many aspects are still poorly understood. We have conducted a proteomic investigation of human Monomac I cells infected with the Nine Mile Phase II strain of C. burnetii and used the results as a framework for a systems biology model of the host response. Our principal methodology was multiplex differential 2D gel electrophoresis using ZDyes, a new generation of covalently linked fluorescent protein detection dyes under development at Montana State University. The 2D gel analysis facilitated the detection of changes in posttranslational modifications on intact proteins in response to infection. The systems model created from our data a framework for the design of experiments to seek a deeper understanding of the host-pathogen interactions.
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Affiliation(s)
- Matt Shipman
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana, United States of America
- * E-mail:
| | - Kirk Lubick
- Department of Veterinary Molecular Biology, Montana State University, Bozeman, Montana, United States of America
| | - David Fouchard
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana, United States of America
| | - Rajani Gurram
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana, United States of America
| | - Paul Grieco
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana, United States of America
| | - Mark Jutila
- Department of Veterinary Molecular Biology, Montana State University, Bozeman, Montana, United States of America
| | - Edward A. Dratz
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana, United States of America
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22
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Pyrophosphatase overexpression is associated with cell migration, invasion, and poor prognosis in gastric cancer. Tumour Biol 2012; 33:1889-98. [PMID: 22797819 DOI: 10.1007/s13277-012-0449-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 06/22/2012] [Indexed: 10/28/2022] Open
Abstract
Inorganic pyrophosphatase (PPase) catalyzes the hydrolysis of pyrophosphate to form orthophosphate. Pyrophosphate can substitute for ATP under certain circumstances. We previously conducted a proteomic analysis to investigate tumor-specific protein expression in gastric cancer, and PPase was identified as a potential gastric tumor-specific marker; it was therefore selected for further study. Clinicopathological analysis, using proteomic analysis and immunohistochemistry, was used to validate PPase as a prognostic marker in gastric cancers. Proteomic analysis showed that PPase was overexpressed in patients with lymph node (LN) metastases and high tumor node metastasis (TNM) stages (p < 0.05). Based on immunohistochemistry, patients whose tumors overexpressed PPase had higher T stages, LN metastasis, a higher TNM stage, a higher cancer recurrence rate, and shorter survival times than patients whose tumors exhibited PPase underexpression (p < 0.05). Gain-of-function and loss-of-function approaches were employed to examine the malignant phenotypes of PPase-overexpressing or PPase-depleted cells. A decrease in PPase expression caused a significant decrease in gastric cancer cell migration and invasion in vitro, whereas forced overexpression of PPase enhanced migration but not invasion. Our findings indicate that PPase is involved in gastric tumor progression and that PPase may be a useful marker for poor prognosis of human gastric cancers.
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Ferjani A, Segami S, Horiguchi G, Sakata A, Maeshima M, Tsukaya H. Regulation of pyrophosphate levels by H+-PPase is central for proper resumption of early plant development. PLANT SIGNALING & BEHAVIOR 2012; 7:38-42. [PMID: 22301965 PMCID: PMC3357364 DOI: 10.4161/psb.7.1.18573] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The synthesis of DNA, RNA, and de novo proteins is fundamental for early development of the seedling after germination, but such processes release pyrophosphate (PPi) as a byproduct of ATP hydrolysis. The over-accumulation of the inhibitory metabolite PPi in the cytosol hinders these biosynthetic reactions. All living organisms possess ubiquitous enzymes collectively called inorganic pyrophosphatases (PPases), which catalyze the hydrolysis of PPi into two orthophosphate (Pi) molecules. Defects in PPase activity cause severe developmental defects and/or growth arrest in several organisms. In higher plants, a proton-translocating vacuolar PPase (H+-PPase) uses the energy of PPi hydrolysis to acidify the vacuole. However, the biological implications of PPi hydrolysis are vague due to the widespread belief that the major role of H+-PPase in plants is vacuolar acidification. We have shown that the Arabidopsis fugu5 mutant phenotype, caused by a defect in H+-PPase activity, is rescued by complementation with the yeast cytosolic PPase IPP1. In addition, our analyses have revealed that increased cytosolic PPi levels impair postgerminative development in fugu5 by inhibiting gluconeogenesis. This led us to the conclusion that the role of H+-PPase as a proton-pump is negligible. Here, we present further evidence of the growth-boosting effects of removing PPi in later stages of plant vegetative development, and briefly discuss the biological role of PPases and their potential applications in different disciplines and in various organisms.
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Affiliation(s)
- Ali Ferjani
- Department of Biology, Tokyo Gakugei University, Koganei-shi, Tokyo, Japan.
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24
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Beattie JH, Nicol F, Gordon MJ, Reid MD, Cantlay L, Horgan GW, Kwun IS, Ahn JY, Ha TY. Ginger phytochemicals mitigate the obesogenic effects of a high-fat diet in mice: a proteomic and biomarker network analysis. Mol Nutr Food Res 2011; 55 Suppl 2:S203-13. [PMID: 21954187 DOI: 10.1002/mnfr.201100193] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 06/29/2011] [Accepted: 07/04/2011] [Indexed: 02/02/2023]
Abstract
SCOPE Natural dietary anti-obesogenic phytochemicals may help combat the rising global incidence of obesity. We aimed to identify key hepatic pathways targeted by anti-obsogenic ginger phytochemicals fed to mice. METHODS AND RESULTS Weaning mice were fed a high-fat diet containing 6-gingerol (HFG), zerumbone (HFZ), a characterized rhizome extract of the ginger-related plant Alpinia officinarum Hance (high fat goryankang, HFGK) or no phytochemicals (high-fat control, HFC) for 6 wks and were compared with mice on a low-fat control diet (LFC). Increased adiposity in the HFC group, compared with the LFC group, was significantly (p<0.05) reduced in the HFG and HFGK groups without food intake being affected. Correlation network analysis, including a novel residuals analysis, was utilized to investigate relationships between liver proteomic data, lipid and cholesterol biomarkers and physiological indicators of adiposity. 6-Gingerol significantly increased plasma cholesterol but hepatic farnesyl diphosphate synthetase, which is involved in cholesterol biosynthesis was decreased, possibly by negative feedback. Acetyl-coenzyme A acyltransferase 1 and enoyl CoA hydratase, which participate in the β-oxidation of fatty acids were significantly (p<0.05) increased by consumption of phytochemical-supplemented diets. CONCLUSION Dietary ginger phytochemicals target cholesterol metabolism and fatty acid oxidation in mice, with anti-obesogenic but also hypercholesterolemic consequences.
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Affiliation(s)
- John H Beattie
- Division of Lifelong Health, Rowett Institute of Nutrition and Health, University of Aberdeen, Bucksburn, Aberdeen, Scotland, UK.
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25
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Ko KM, Lee W, Yu JR, Ahnn J. PYP-1, inorganic pyrophosphatase, is required for larval development and intestinal function in C. elegans. FEBS Lett 2007; 581:5445-53. [PMID: 17981157 DOI: 10.1016/j.febslet.2007.10.047] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Revised: 10/17/2007] [Accepted: 10/24/2007] [Indexed: 10/22/2022]
Abstract
Inorganic pyrophosphatase (PPase) catalyzes the hydrolysis of inorganic pyrophosphate (PPi) into phosphate (Pi), which provides a thermodynamic driving force for important biosynthetic reactions. The nematode Caenorhabditis elegans gene C47E12.4 encodes a PPase (PYP-1) which shows 54% amino acid identity with human PPase. PYP-1 exhibits specific enzyme activity and is mainly expressed in the intestinal and nervous system. A null mutant of pyp-1 reveals a developmental arrest at early larval stages and exhibits gross defects in intestinal morphology and function. The larval arrest phenotype was successfully rescued by reintroduction of the pyp-1 gene, suggesting that PYP-1 is required for larval development and intestinal function in C. elegans.
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Affiliation(s)
- Kyung Min Ko
- Cell Dynamics Research Center, Department of Life Science, GIST, Gwangju 500-712, Republic of Korea
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