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Ahmadi S, Lotay N, Thompson M. Affinity-based electrochemical biosensor with antifouling properties for detection of lysophosphatidic acid, a promising early-stage ovarian cancer biomarker. Bioelectrochemistry 2023; 153:108466. [PMID: 37244204 DOI: 10.1016/j.bioelechem.2023.108466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/09/2023] [Accepted: 05/12/2023] [Indexed: 05/29/2023]
Abstract
Electrochemical techniques are considered to be highly sensitive, capable of fast response and can be easily miniaturized, properties which can aid with regard to the fabrication of compact point-of-care medical devices; however, the main challenge in developing such a tool is overcoming a ubiquitous, problematic phenomenon known as non-specific adsorption (NSA). NSA is due to the fouling of non-target molecules in the blood on the recognition surface of the device. To overcome NSA, we have developed an affinity-based electrochemical biosensor using medical-grade stainless steel electrodes and following a unique and novel strategy using silane-based interfacial chemistry to detect lysophosphatidic acid (LPA), a highly promising biomarker, which was found to be elevated in 90 % of stage I OC patients and gradually increases as the disease progresses to later stages. The biorecognition surface was developed using the affinity-based gelsolin-actin system, which was previously investigated by our group to detect LPA using fluorescence spectroscopy. We demonstrate the capability of this label-free biosensor to detect LPA in goat serum with a detection limit of 0.7 µM as a proof-of-concept for the early diagnosis of ovarian cancer.
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Affiliation(s)
- Soha Ahmadi
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Navina Lotay
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Michael Thompson
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada.
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2
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Tarannum N, Kumar D, Agrawal R. Facile Titrimetric Assay of Lysophosphatidic Acid in Human Serum and Plasma for Ovarian Cancer Detection. J Cancer Prev 2023; 28:31-39. [PMID: 37434795 PMCID: PMC10331031 DOI: 10.15430/jcp.2023.28.2.31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 07/13/2023] Open
Abstract
Herein, an instrument free facile acid-base titrimetric methodology is reported for lysophosphatidic acid (LPA) measurement in serum and plasma samples for ovarian cancer detection. The concept is based on the titrimetric method in which alkaline solution was titrated with free fatty acid. Free fatty acid is generated due to action of the lysophospholipase to LPA. A phospholipid derivative known as LPA can function as a signaling molecule. A glycerol backbone serves as the foundation for phosphatidic acid, which also has bonds to an unsaturated fatty acid at carbon-1, a hydroxyl group at carbon-2, and a phosphate molecule at carbon-3. Free fatty acid and glycerol-3-phosphate are formed when LPA reacts with lysophospholipase. The formation of free fatty acid depends on the concentration of LPA. The standard graph of known concentrations of LPA, LPA spiked serum and LPA spiked plasma was plotted. The concentration of LPA in unknown serum and plasma were calculated from the standard graph. The limit of detection of LPA in spiked serum and plasma samples via titrimetric assay was calculated as 0.156 μmol/L. A patient's chance of survival may be outweighed by an early diagnosis of ovarian cancer.
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Affiliation(s)
- Nazia Tarannum
- Department of Chemistry, Chaudhary Charan Singh University, Meerut, India
| | - Deepak Kumar
- Department of Chemistry, Chaudhary Charan Singh University, Meerut, India
| | - Ranu Agrawal
- Department of Applied Science, Sir Chhotu Ram Institute of Engineering and Technology, Chaudhary Charan Singh University, Meerut, India
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3
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Fontaine N, Harter L, Marette A, Boudreau D. Acting as a Molecular Tailor: Dye Structural Modifications for Improved Sensitivity toward Lysophosphatidic Acids Sensing. ACS OMEGA 2023; 8:1067-1078. [PMID: 36643514 PMCID: PMC9835520 DOI: 10.1021/acsomega.2c06420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
Lysophosphatidic acids (LPA) are key biomarkers for several physiological processes, the monitoring of which can provide insights into the host's health. Common lab-based techniques for their detection are cumbersome, expensive, and necessitate specialized personnel to operate. LPA-sensitive fluorescent probes have been described, albeit for nonaqueous conditions, which impedes their use in biological matrices. In this paper, we explore in detail the influence of structure on the extent of aggregation-induced fluorescence quenching using specially synthesized styrylpyridinium dyes bearing structural adaptations to bestow them enhanced affinity toward LPA in aqueous media. Spectroscopic investigations supported by time-resolved fluorimetry revealed the contribution of excimer formation to the fluorescence quenching mechanism displayed by the fluorescent probes. Experimental observations of the influence of structure on detection sensitivity were supported by DFT calculations.
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Affiliation(s)
- Nicolas Fontaine
- Department
of Chemistry, Université Laval, 1045 avenue de la Médecine, Québec, CanadaG1V 0A6
- Center
for Optics, Photonics and Lasers, Université
Laval, 2375 rue de la
Terrasse, Québec, CanadaG1V 0A6
| | - Lara Harter
- Department
of Chemistry, Université Laval, 1045 avenue de la Médecine, Québec, CanadaG1V 0A6
- Center
for Optics, Photonics and Lasers, Université
Laval, 2375 rue de la
Terrasse, Québec, CanadaG1V 0A6
| | - André Marette
- Quebec
Heart and Lung Institute, Université
Laval, 2725, chemin Sainte-Foy, Québec, CanadaG1V 4G5
- Institute
of Nutrition and Functional Foods, Université
Laval, 2440, boulevard
Hochelaga, Québec, QC, CanadaG1V 0A6
| | - Denis Boudreau
- Department
of Chemistry, Université Laval, 1045 avenue de la Médecine, Québec, CanadaG1V 0A6
- Center
for Optics, Photonics and Lasers, Université
Laval, 2375 rue de la
Terrasse, Québec, CanadaG1V 0A6
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Huang X, Feng B, Liu M, Liu Z, Li S, Zeng W. Preclinical detection of lysophosphatidic acid: A new window for ovarian cancer diagnostics. Talanta 2022; 247:123561. [DOI: 10.1016/j.talanta.2022.123561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/29/2022] [Accepted: 05/14/2022] [Indexed: 12/17/2022]
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Zhang Q, Yang X, Wang Q, Zhang Y, Gao P, Li Z, Liu R, Xu H, Bi K, Li Q. "Modeling-Prediction" Strategy for Deep Profiling of Lysophosphatidic Acids by Liquid Chromatography-Mass Spectrometry: Exploration Biomarkers of Breast Cancer. J Chromatogr A 2020; 1634:461634. [PMID: 33176220 DOI: 10.1016/j.chroma.2020.461634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/18/2020] [Accepted: 10/19/2020] [Indexed: 01/13/2023]
Abstract
Lysophosphatidic acids (LPAs) are important bioactive phospholipids consisting of various species involved in a wide array of physiological and pathological processes. However, LPAs were rarely identified in untargeted lipidomics studies because of the incompatibility with analytical methods. Moreover, in targeted studies, the coverages of LPAs remained unsatisfactorily low due to the limitation of reference standards. Herein, a "modeling-prediction" workflow for deep profiling of LPAs by liquid chromatography-mass spectrometry was developed. Multiple linear regression models of qualitative and quantitative parameters were established according to features of fatty acyl tails of the commercial standards to predict the corresponding parameters for unknown LPAs. Then 72 multiple reaction monitoring (MRM) transitions were monitored simultaneously and species of LPA 14:0, LPA 16:1, LPA 18:3, LPA 20:3 and LPA 20:5 were firstly characterized and quantified in plasma. Finally, the workflow was applied to explore the changes of LPAs in plasma of breast cancer patients compared with healthy volunteers. Multi-LPAs indexes with strong diagnostic ability for breast cancer were identified successfully using Student's t- test, orthogona partial least-squares discrimination analysis (OPLS-DA) and logistic regression- receiver operating characteristic (ROC) curve analysis. The proposed workflow with high sensitivity, high accuracy, high coverage and reliable identification would be a powerful complement to untargeted lipidomics and shed a light on the analysis of other lipids.
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Affiliation(s)
- Qian Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Xiao Yang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Qian Wang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Yiwen Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Peng Gao
- Metabolomics Core Facility of RHLCCC, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, United States
| | - Zuojing Li
- School of Medical Devices, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Ran Liu
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Huarong Xu
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Kaishun Bi
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Qing Li
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China.
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LI NS, CHEN L, XIAO ZX, YANG YQ, AI KL. Progress in Detection of Biomarker of Ovarian Cancer: Lysophosphatidic Acid. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1016/s1872-2040(20)60062-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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De La Franier B, Thompson M. Detection of the Ovarian Cancer Biomarker Lysophosphatidic Acid in Serum. BIOSENSORS-BASEL 2020; 10:bios10020013. [PMID: 32075013 PMCID: PMC7168251 DOI: 10.3390/bios10020013] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/06/2020] [Accepted: 02/11/2020] [Indexed: 02/07/2023]
Abstract
Lysophosphatidic acid (LPA) is present during the medical condition of ovarian cancer at all stages of the disease, and, therefore possesses considerable potential as a biomarker for screening its presence in female patients. Unfortunately, there is currently no clinically employable assay for this biomarker. In the present work, we introduce a test based on the duel protein system of actin and gelsolin that could allow the quantitative measurement of LPA in serum samples in a biosensing format. In order to evaluate this possibility, actin protein was dye-modified and complexed with gelsolin protein, followed by surface deposition onto silica nanoparticles. This solid-phase system was exposed to serum samples containing various concentrations of LPA and analyzed by fluorescence microscopy. Measurements conducted for the LPA-containing serum samples were higher after exposure to the developed test than samples without LPA. Early results suggest a limit of detection of 5 μM LPA in serum. The eventual goal is to employ the chemistry described here in a biosensor configuration for the large population-scale, rapid screening of women for the potential occurrence of ovarian cancer.
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Moore RG, Blackman A, Miller MC, Robison K, DiSilvestro PA, Eklund EE, Strongin R, Messerlian G. Multiple biomarker algorithms to predict epithelial ovarian cancer in women with a pelvic mass: Can additional makers improve performance? Gynecol Oncol 2019; 154:150-155. [PMID: 30992143 DOI: 10.1016/j.ygyno.2019.04.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/06/2019] [Accepted: 04/06/2019] [Indexed: 12/27/2022]
Abstract
INTRODUCTION Management of a woman with a pelvic mass is complicated by difficulty in discriminating malignant from benign disease. Many serum biomarkers have been examined to determine their sensitivity for detecting malignancy. This study was designed to evaluate if the addition of biomarkers to HE4 and CA125, as used in the Risk of Malignancy Algorithm (ROMA), can improve the detection of EOC. METHODS This was an IRB approved, prospective clinical trial examining serum obtained from women diagnosed with a pelvic mass who subsequently underwent surgery. Serum biomarker levels for CA125, HE4, YKL-40, transthyretin, ApoA1, Beta-2-microglobulin, transferrin, and LPA were measured. Logistic regression analysis was performed for various marker combinations, ROC curves were generated, and the area under the curves (AUCs) were determined. RESULTS A total of 184 patients met inclusion criteria with a median age of 56 years (Range 20-91). Final pathology revealed there were 103 (56.0%) benign tumors, 4 (2.2%) LMP tumors, 61 EOC (33.1%), 2 (1.1%) non-EOC ovarian cancers, 6 (3.3%) gynecologic cancers with metastasis to the ovary and 8 (4.3%) non-gynecologic cancers with metastasis to the ovary. The combination of HE4 and CA125 (i.e. ROMA) achieved an AUC of 91.2% (95% CI: 86.0-96.4) for the detection of EOC vs benign disease. The combination of CA125, HE4, YKL-40, transthyretin, ApoA1, Beta 2 microglobulin, transferrin, LPA and menopausal status achieved the highest AUC of 94.6% (95% CI: 90.1-99.2) but this combination was not significantly better than the HE4 and CA125 combination alone (p = 0.078). CONCLUSIONS The addition of select further serum biomarkers to HE4 and CA125 does not add to the performance of the dual marker combination for the detection of ovarian cancer.
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Affiliation(s)
- Richard G Moore
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Wilmot Cancer Institute, University of Rochester, Rochester, NY 14620, USA; Center for Biomarkers and Emerging Technologies, Women and Infants Hospital/Brown University, RI 02905, USA; Program in Women's Oncology, Department of Obstetrics and Gynecology, Women and Infants Hospital/Brown University, RI 02905, USA.
| | - Alexandra Blackman
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Wilmot Cancer Institute, University of Rochester, Rochester, NY 14620, USA
| | - M Craig Miller
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Wilmot Cancer Institute, University of Rochester, Rochester, NY 14620, USA
| | - Katina Robison
- Program in Women's Oncology, Department of Obstetrics and Gynecology, Women and Infants Hospital/Brown University, RI 02905, USA
| | - Paul A DiSilvestro
- Program in Women's Oncology, Department of Obstetrics and Gynecology, Women and Infants Hospital/Brown University, RI 02905, USA
| | - Elizabeth E Eklund
- Center for Biomarkers and Emerging Technologies, Women and Infants Hospital/Brown University, RI 02905, USA; Department of Pathology, Women and Infants Hospital/Brown University, RI 02905, USA
| | - Robert Strongin
- Department of Chemistry, Portland State University, Portland, OR 97201, USA
| | - Geralyn Messerlian
- Center for Biomarkers and Emerging Technologies, Women and Infants Hospital/Brown University, RI 02905, USA; Department of Pathology, Women and Infants Hospital/Brown University, RI 02905, USA
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9
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Wang Y, Pei H, Jia Y, Liu J, Li Z, Ai K, Lu Z, Lu L. Synergistic Tailoring of Electrostatic and Hydrophobic Interactions for Rapid and Specific Recognition of Lysophosphatidic Acid, an Early-Stage Ovarian Cancer Biomarker. J Am Chem Soc 2017; 139:11616-11621. [PMID: 28782946 DOI: 10.1021/jacs.7b06885] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Early detection of ovarian cancer, the most lethal type of gynecologic cancer, can dramatically improve the efficacy of available treatment strategies. However, few screening tools exist for rapidly and effectively diagnosing ovarian cancer in early stages. Here, we present a facile "lock-key" strategy, based on rapid, specific detection of plasma lysophosphatidic acid (LPA, an early stage biomarker) with polydiacetylenes (PDAs)-based probe, for the early diagnosis of ovarian cancer. This strategy relies on specifically inserting LPA "key" into the PDAs "lock" through the synergistic electrostatic and hydrophobic interactions between them, leading to conformation transition of the PDA backbone with a concomitant blue-to-red color change. The detailed mechanism underlying the high selectivity of PDAs toward LPA is revealed by comprehensive theoretical calculation and experiments. Moreover, the level of LPA can be quantified in plasma samples from both mouse xenograft tumor models and patients with ovarian cancer. Impressively, this approach can be introduced into a portable point-of-care device to successfully distinguish the blood samples of patients with ovarian cancer from those of healthy people, with 100% accuracy. This work provides a valuable portable tool for early diagnosis of ovarian cancer and thus holds a great promise to dramatically improve the overall survival.
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Affiliation(s)
- Ying Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , 5625 Renmin Street, Changchun 130022, China.,University of Chinese Academy of Sciences , Beijing 100049, China
| | - Hanwen Pei
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun 130023, China
| | | | | | - Zelun Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , 5625 Renmin Street, Changchun 130022, China
| | - Kelong Ai
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , 5625 Renmin Street, Changchun 130022, China
| | - Zhongyuan Lu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun 130023, China
| | - Lehui Lu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , 5625 Renmin Street, Changchun 130022, China.,University of Chinese Academy of Sciences , Beijing 100049, China
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Wang J, Sibrian-Vazquez M, Escobedo JO, Wang L, Chu YH, Moore RG, Strongin RM. Templated polymers enable selective capture and release of lysophosphatidic acid in human plasma via optimization of non-covalent binding to functional monomers. Analyst 2016; 140:7572-7. [PMID: 26455441 DOI: 10.1039/c5an01597a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The first solid phase extraction materials for selective lysophosphatidic acid (LPA) enrichment from human plasma are described. Molecularly imprinted polymers were designed, synthesized and evaluated as cartridge fillings. They enabled a relatively rapid and simple extraction protocol for LPA without any need for multiple liquid-liquid extraction steps. The five major subspecies of lysophosphatidic acid are readily separated from all other native plasma phospholipids, including those well-known to interfere with LPA quantitation, such as phosphatidylcholine and lysophosphatidylcholine. Outstanding LPA purity is obtained via these solid phase materials in a tandem extraction setup.
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Affiliation(s)
- Jialu Wang
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.
| | | | - Jorge O Escobedo
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.
| | - Lei Wang
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.
| | - Yu-Hsuan Chu
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.
| | - Richard G Moore
- Women and Infants Hospital, Brown University, Providence, RI 02905, USA
| | - Robert M Strongin
- Department of Chemistry, Portland State University, Portland, OR 97201, USA.
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Wang L, Sibrian-Vazquez M, Escobedo JO, Wang J, Moore RG, Strongin RM. Spiroguanidine rhodamines as fluorogenic probes for lysophosphatidic acid. Chem Commun (Camb) 2015; 51:1697-700. [PMID: 25516957 PMCID: PMC4320994 DOI: 10.1039/c4cc08818b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Direct determination of total lysophosphatidic acid (LPA) was accomplished using newly developed spiroguanidines derived from rhodamine B as universal fluorogenic probes. Optimum conditions for the quantitative analysis of total LPA were investigated. The linear range for the determination of total LPA is up to 5 μM with a limit of detection of 0.512 μM.
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Affiliation(s)
- Lei Wang
- Department of Chemistry, Portland State University, Portland, OR 97201, USA. Tel: +1-503-725-9724
| | - Martha Sibrian-Vazquez
- Department of Chemistry, Portland State University, Portland, OR 97201, USA. Tel: +1-503-725-9724
| | - Jorge O. Escobedo
- Department of Chemistry, Portland State University, Portland, OR 97201, USA. Tel: +1-503-725-9724
| | - Jialu Wang
- Department of Chemistry, Portland State University, Portland, OR 97201, USA. Tel: +1-503-725-9724
| | - Richard G. Moore
- Women and Infants Hospital, Brown University, 101 Dudley Street, Providence, RI 02905, USA; Tel: +1-401-453-7520
| | - Robert M. Strongin
- Department of Chemistry, Portland State University, Portland, OR 97201, USA. Tel: +1-503-725-9724
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12
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Onorato JM, Shipkova P, Minnich A, Aubry AF, Easter J, Tymiak A. Challenges in accurate quantitation of lysophosphatidic acids in human biofluids. J Lipid Res 2014; 55:1784-96. [PMID: 24872406 DOI: 10.1194/jlr.d050070] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Indexed: 01/30/2023] Open
Abstract
Lysophosphatidic acids (LPAs) are biologically active signaling molecules involved in the regulation of many cellular processes and have been implicated as potential mediators of fibroblast recruitment to the pulmonary airspace, pointing to possible involvement of LPA in the pathology of pulmonary fibrosis. LPAs have been measured in various biological matrices and many challenges involved with their analyses have been documented. However, little published information is available describing LPA levels in human bronchoalveolar lavage fluid (BALF). We therefore conducted detailed investigations into the effects of extensive sample handling and sample preparation conditions on LPA levels in human BALF. Further, targeted lipid profiling of human BALF and plasma identified the most abundant lysophospholipids likely to interfere with LPA measurements. We present the findings from these investigations, highlighting the importance of well-controlled sample handling for the accurate quantitation of LPA. Further, we show that chromatographic separation of individual LPA species from their corresponding lysophospholipid species is critical to avoid reporting artificially elevated levels. The optimized sample preparation and LC/MS/MS method was qualified using a stable isotope-labeled LPA as a surrogate calibrant and used to determine LPA levels in human BALF and plasma from a Phase 0 clinical study comparing idiopathic pulmonary fibrosis patients to healthy controls.
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Affiliation(s)
- Joelle M Onorato
- Departments of Bioanalytical and Discovery Analytical Science, Bristol-Myers Squibb Co., Princeton, NJ
| | - Petia Shipkova
- Departments of Bioanalytical and Discovery Analytical Science, Bristol-Myers Squibb Co., Princeton, NJ
| | - Anne Minnich
- Exploratory Clinical and Translational Research, Bristol-Myers Squibb Co., Princeton, NJ
| | - Anne-Françoise Aubry
- Analytical and Bioanalytical Development, Bristol-Myers Squibb Co., Princeton, NJ
| | - John Easter
- Discovery Chemistry, Bristol-Myers Squibb Co., Princeton, NJ
| | - Adrienne Tymiak
- Departments of Bioanalytical and Discovery Analytical Science, Bristol-Myers Squibb Co., Princeton, NJ
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Methods for quantifying lysophosphatidic acid in body fluids: a review. Anal Biochem 2014; 453:38-43. [PMID: 24613261 DOI: 10.1016/j.ab.2014.02.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 02/10/2014] [Accepted: 02/21/2014] [Indexed: 11/23/2022]
Abstract
Lysophosphatidic acid (LPA) is a bioactive lipid involved in cellular signal transduction. LPA plays a role in both physiological and pathological processes. Elevated levels of LPA are observed in the plasma of patients with epithelial ovarian cancer, indicating its potential as a diagnostic marker. Quantification of total LPA can be performed by radioenzymatic, fluorometric, colorimetric, or immunoezymatic assay. Determination of individual LPA molecular species requires the use of capillary electrophoresis, gas chromatography, thin layer chromatography, liquid chromatography, or a matrix-assisted laser desorption/ionization time-of-flight method connected to an appropriate detection system.
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