1
|
Assay of Phospholipase D Activity by an Amperometric Choline Oxidase Biosensor. SENSORS 2020; 20:s20051304. [PMID: 32121031 PMCID: PMC7085753 DOI: 10.3390/s20051304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/21/2020] [Accepted: 02/25/2020] [Indexed: 11/24/2022]
Abstract
A novel electrochemical method to assay phospholipase D (PLD) activity is proposed based on the employment of a choline biosensor realized by immobilizing choline oxidase through co-crosslinking on an overoxidized polypyrrole film previously deposited on a platinum electrode. To perform the assay, an aliquot of a PLD standard solution is typically added to borate buffer containing phosphatidylcholine at a certain concentration and the oxidation current of hydrogen peroxide is then measured at the rotating modified electrode by applying a detection potential of +0.7 V vs. SCE. Various experimental parameters influencing the assay were studied and optimized. The employment of 0.75% (v/v) Triton X-100, 0.2 mM calcium chloride, 5 mM phosphatidylcholine, and borate buffer at pH 8.0, ionic strength (I) 0.05 M allowed to achieve considerable current responses. In order to assure a controlled mass transport and, at the same time, high sensitivity, an electrode rotation rate of 200 rpm was selected. The proposed method showed a sensitivity of 24 (nA/s)⋅(IU/mL)−1, a wide linear range up to 0.33 IU/mL, fast response time and appreciable long-term stability. The limit of detection, evaluated from the linear calibration curve, was 0.005 IU/mL (S/N = 3). Finally, due to the presence of overoxidized polypyrrole film characterized by notable rejection properties towards electroactive compounds, a practical application to real sample analysis can be envisaged.
Collapse
|
2
|
Zhu X, Fan L, Wang S, Lei C, Huang Y, Nie Z, Yao S. Phospholipid-Tailored Titanium Carbide Nanosheets as a Novel Fluorescent Nanoprobe for Activity Assay and Imaging of Phospholipase D. Anal Chem 2018; 90:6742-6748. [DOI: 10.1021/acs.analchem.8b00581] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xiaohua Zhu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Lin Fan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Shigong Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Chunyang Lei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Yan Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
| |
Collapse
|
3
|
Fiore M, Madanamoothoo W, Berlioz-Barbier A, Maniti O, Girard-Egrot A, Buchet R, Strazewski P. Giant vesicles from rehydrated crude mixtures containing unexpected mixtures of amphiphiles formed under plausibly prebiotic conditions. Org Biomol Chem 2018; 15:4231-4240. [PMID: 28466946 DOI: 10.1039/c7ob00708f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Giant lipid vesicles resemble compartments of biological cells, mimicking them in their dimension, membrane structure and partly in their membrane composition. The spontanenous appearance of closed membranes composed of bilayers of self-assembling amphiphiles was likely a prerequisite for Darwinian competitive behavior to set in at the molecular level. Such compartments should be dynamic in their membrane composition (evolvable), and sufficiently stable to harbor macromolecules (leak-free), yet semi-permeable for reactive small molecules to get across the membrane (stay away from chemical equilibrium). Here we describe bottom-up experiments simulating prebiotic environments that support the formation of simple amphiphilic molecules capable of self-assembling into vesicular objects on the micrometer scale. Long-chain alkyl phosphates, together with related amphiphilic compounds, were formed under simulated prebiotic phosphorylation conditions by using cyanamide, a recognized prebiotic chemical activator and a precursor for several compound classes. Crude dry material of the thus obtained prebiotic mixtures formed multilamellar giant vesicles once rehydrated at the appropriate pH and in the presence of plausibly prebiotic co-surfactants, as observed by optical microscopy. The size and the shape of lipid aggregates tentatively suggest that prebiotic lipid assemblies could encapsulate peptides or nucleic acids that could be formed under similar chemical prebiotic conditions. The formation of prebiotic amphiphiles was monitored by using TLC, IR, NMR and ESI-MS and UPLC-HRMS. In addition we provide a spectroscopic analysis of cyanamide under simulated prebiotic conditions in the presence of phosphate sources and spectroscopic analysis of O-phosphorylethanolamine as a plausible precursor for phosphoethanolamine lipids.
Collapse
Affiliation(s)
- Michele Fiore
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Université de Lyon, Claude Bernard Lyon 1, 43 bdv du 11 Novembre 1918, 69622 Villeurbanne Cedex, France.
| | | | | | | | | | | | | |
Collapse
|
6
|
Rahier R, Noiriel A, Abousalham A. Development of a Direct and Continuous Phospholipase D Assay Based on the Chelation-Enhanced Fluorescence Property of 8-Hydroxyquinoline. Anal Chem 2015; 88:666-74. [DOI: 10.1021/acs.analchem.5b02332] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Renaud Rahier
- Institut
de Chimie et de Biochimie Moléculaires
et Supramoléculaires (ICBMS) UMR 5246 CNRS, Université Claude Bernard Lyon 1, Organisation
et Dynamique des Membranes Biologiques, Bâtiment Raulin, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
| | - Alexandre Noiriel
- Institut
de Chimie et de Biochimie Moléculaires
et Supramoléculaires (ICBMS) UMR 5246 CNRS, Université Claude Bernard Lyon 1, Organisation
et Dynamique des Membranes Biologiques, Bâtiment Raulin, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
| | - Abdelkarim Abousalham
- Institut
de Chimie et de Biochimie Moléculaires
et Supramoléculaires (ICBMS) UMR 5246 CNRS, Université Claude Bernard Lyon 1, Organisation
et Dynamique des Membranes Biologiques, Bâtiment Raulin, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
| |
Collapse
|
7
|
Ren Z, Do LD, Bechkoff G, Mebarek S, Keloglu N, Ahamada S, Meena S, Magne D, Pikula S, Wu Y, Buchet R. Direct determination of phosphatase activity from physiological substrates in cells. PLoS One 2015; 10:e0120087. [PMID: 25785438 PMCID: PMC4364917 DOI: 10.1371/journal.pone.0120087] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 01/19/2015] [Indexed: 01/09/2023] Open
Abstract
A direct and continuous approach to determine simultaneously protein and phosphate concentrations in cells and kinetics of phosphate release from physiological substrates by cells without any labeling has been developed. Among the enzymes having a phosphatase activity, tissue non-specific alkaline phosphatase (TNAP) performs indispensable, multiple functions in humans. It is expressed in numerous tissues with high levels detected in bones, liver and neurons. It is absolutely required for bone mineralization and also necessary for neurotransmitter synthesis. We provided the proof of concept that infrared spectroscopy is a reliable assay to determine a phosphatase activity in the osteoblasts. For the first time, an overall specific phosphatase activity in cells was determined in a single step by measuring simultaneously protein and substrate concentrations. We found specific activities in osteoblast like cells amounting to 116 ± 13 nmol min(-1) mg(-1) for PPi, to 56 ± 11 nmol min(-1) mg(-1) for AMP, to 79 ± 23 nmol min(-1) mg(-1) for beta-glycerophosphate and to 73 ± 15 nmol min(-1) mg(-1) for 1-alpha-D glucose phosphate. The assay was also effective to monitor phosphatase activity in primary osteoblasts and in matrix vesicles. The use of levamisole--a TNAP inhibitor--served to demonstrate that a part of the phosphatase activity originated from this enzyme. An IC50 value of 1.16 ± 0.03 mM was obtained for the inhibition of phosphatase activity of levamisole in osteoblast like cells. The infrared assay could be extended to determine any type of phosphatase activity in other cells. It may serve as a metabolomic tool to monitor an overall phosphatase activity including acid phosphatases or other related enzymes.
Collapse
Affiliation(s)
- Zhongyuan Ren
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University Changchun, 130012, China
| | - Le Duy Do
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
- Department of Biochemistry, Nencki Institute of Experimental Biology and Polish Academy of Sciences, 02–093 Warsaw, Poland
| | - Géraldine Bechkoff
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
| | - Saida Mebarek
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
| | - Nermin Keloglu
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
| | - Saandia Ahamada
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
| | - Saurabh Meena
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
| | - David Magne
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
| | - Slawomir Pikula
- Department of Biochemistry, Nencki Institute of Experimental Biology and Polish Academy of Sciences, 02–093 Warsaw, Poland
| | - Yuqing Wu
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University Changchun, 130012, China
| | - René Buchet
- Université de Lyon, Villeurbanne, France
- Université Lyon 1, Villeurbanne, France
- INSA-Lyon, Villeurbanne, France
- CPE Lyon, Villeurbanne, France
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Villeurbanne, France
- CNRS UMR 5246, Villeurbanne, France
| |
Collapse
|
8
|
Cen Y, Wu YM, Kong XJ, Wu S, Yu RQ, Chu X. Phospholipid-modified upconversion nanoprobe for ratiometric fluorescence detection and imaging of phospholipase D in cell lysate and in living cells. Anal Chem 2014; 86:7119-27. [PMID: 24939283 DOI: 10.1021/ac5016694] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Phospholipase D (PLD) is a critical component of intracellular signal transduction and has been implicated in many important biological processes. It has been observed that there are abnormalities in PLD expression in many human cancers, and PLD is thus recognized as a potential diagnostic biomarker as well as a target for drug discovery. We report for the first time a phospholipid-modified nanoprobe for ratiometric upconversion fluorescence (UCF) sensing and bioimaging of PLD activity. The nanoprobe can be synthesized by a facile one-step self-assembly of a phospholipid monolayer composed of poly(ethylene glycol) (PEG)ylated phospholipid and rhodamine B-labeled phospholipid on the surface of upconversion nanoparticles (UCNPs) NaYF4: 20%Yb, 2%Er. The fluorescence resonance energy transfer (FRET) process from the UCF emission at 540 nm of the UCNPs to the absorbance of the rhodamine B occurs in the nanoprobe. The PLD-mediated hydrolysis of the phosphodiester bond makes rhodamine B apart from the UCNP surface, leading to the inhibition of FRET. Using the unaffected UCF emission at 655 nm as an internal standard, the nanoprobe can be used for ratiometric UCF detection of PLD activity with high sensitivity and selectivity. The PLD activity in cell lysates is also determined by the nanoprobe, confirming that PLD activity in a breast cancer cell is at least 7-fold higher than in normal cell. Moreover, the nanoprobe has been successfully applied to monitoring PLD activity in living cells by UCF bioimaging. The results reveal that the nanoprobe provides a simple, sensitive, and robust platform for point-of-care diagnostics and drug screening in biomedical applications.
Collapse
Affiliation(s)
- Yao Cen
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University , Changsha 410082, People's Republic of China
| | | | | | | | | | | |
Collapse
|