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Association of cholesterol efflux capacity with plasmalogen levels of high-density lipoprotein: A cross-sectional study in chronic kidney disease patients. Atherosclerosis 2018; 270:102-109. [DOI: 10.1016/j.atherosclerosis.2018.01.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/19/2018] [Accepted: 01/24/2018] [Indexed: 11/18/2022]
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Mawatari S, Hazeyama S, Morisaki T, Fujino T. Enzymatic measurement of ether phospholipids in human plasma after hydrolysis of plasma with phospholipase A 1. Pract Lab Med 2018; 10:44-51. [PMID: 29487891 PMCID: PMC5814366 DOI: 10.1016/j.plabm.2018.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 01/04/2018] [Accepted: 01/04/2018] [Indexed: 11/03/2022] Open
Abstract
Objectives Ethanolamine ether phospholipids (ePE) and choline ether phospholipid (ePC) are present in human serum or plasma. Decreases in ether phospholipids (plasmalogens) in serum (plasma) have been reported in several diseases such as Alzheimer's disease, Parkinson's disease, metabolic syndrome, schizophrenia. Therefore, need for assay of ether phospholipids in plasma may increase in the future. Nowadays, measurement of the ether phospholipids in human plasma seem to depend on tandem mass spectrometry (LC/MS/MS), but a system for LC/MS/MS is too expensive for most of ordinary clinical laboratories, moreover, use and maintenance of the system are time consuming. Design and methods Phospholipase A1 (PLA1) hydrolyzes ester (acyl) bond at the sn-1 position of glycerophospholipids, but it does not act on ether bond at the sn-1 position. We confirmed by a HPLC method that treatment of plasma with PLA1 causes complete disappearance of all diacyl phospholipids, but ether phospholipids remain intact. On the basis of these observations, we developed an enzymatic assay method for ePE and ePC in human plasma by use of a fluorescence plate reader. Results The amount of ePE in human plasma measured by the enzymatic method was well correlated to that by LC/ESI-MS method (R2 > 0.94), but the correlation of ePC between the two methods was bit poorer (R2 > 0.77) than that of ePE. Conclusion The enzymatic method may be applied to assay of ether phospholipids (ePE and ePC) not only in human plasma but also to assay of ePE and ePC in the other tissues. Enzymatic assay method of ether phospholipids in human plasma. To our knowledge, the first report of enzymatic assay method of ether phospholipids. The enzymatic method correlate with HPLC-ELSD method. The method may be applicable to many tissues other than human plasma.
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Affiliation(s)
- Shiro Mawatari
- Institute of Rheological Functions of Food, 2241 Kubara, Hisayama Chou, Kasuya-gun, Fukuoka 811-2501, Japan
| | - Seira Hazeyama
- Institute of Rheological Functions of Food, 2241 Kubara, Hisayama Chou, Kasuya-gun, Fukuoka 811-2501, Japan
| | - Tomomi Morisaki
- Institute of Rheological Functions of Food, 2241 Kubara, Hisayama Chou, Kasuya-gun, Fukuoka 811-2501, Japan
| | - Takehiko Fujino
- Institute of Rheological Functions of Food, 2241 Kubara, Hisayama Chou, Kasuya-gun, Fukuoka 811-2501, Japan
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Mawatari S, Hazeyama S, Fujino T. Measurement of Ether Phospholipids in Human Plasma with HPLC-ELSD and LC/ESI-MS After Hydrolysis of Plasma with Phospholipase A1. Lipids 2016; 51:997-1006. [PMID: 27386871 PMCID: PMC4958133 DOI: 10.1007/s11745-016-4170-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 06/13/2016] [Indexed: 11/25/2022]
Abstract
Ethanolamine ether phospholipid (eEtnGpl) and choline ether phospholipid (eChoGpl) are present in human plasma or serum, but the relative concentration of the ether phospholipids in plasma is very low as compared to those in other tissues. Nowadays, measurement of ether phospholipids in plasma depends on tandem mass spectrometry (LC/MS/MS), but a system for LC/MS/MS is generally too expensive for usual clinical laboratories. Treatment of plasma with phospholipase A1 (PLA1) causes complete hydrolysis of diacylphospholipids, but ether phospholipids remain intact. After the treatment of plasma with PLA1, both eEtnGpl and eChoGpl are detected as independent peaks by high-performance liquid chromatography with evaporative light scattering detection (HPLC–ELSD). The same sample used for HPLC–ELSD can be applied to detect eEtnGpl and eChoGpl with electrospray ionization mass spectrometry. Presence of alkylacylphospholipids in both eChoGpl and eEtnGpl in human plasma was indicated by sequential hydrolysis of plasma with PLA1 and hydrochloric acid.
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Affiliation(s)
- Shiro Mawatari
- Institute of Rheological Functions of Food, 2241 Kubara, Hisayama Chou, Kasuya-gun, Fukuoka, 811-2501, Japan.
| | - Seira Hazeyama
- Institute of Rheological Functions of Food, 2241 Kubara, Hisayama Chou, Kasuya-gun, Fukuoka, 811-2501, Japan
| | - Takehiko Fujino
- Institute of Rheological Functions of Food, 2241 Kubara, Hisayama Chou, Kasuya-gun, Fukuoka, 811-2501, Japan
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Chen H, Lu Q, Liao J, Yuan R, Chen S. Anodic electrogenerated chemiluminescence behavior and the choline biosensing application of blue emitting conjugated polymer dots. Chem Commun (Camb) 2016; 52:7276-9. [DOI: 10.1039/c6cc02182d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The anodic electrochemiluminescence (ECL) behavior of poly(9,9-dioctylfluorenyl-2,7-diyl) (PFO) dots was studied and applied in oxidoreductase-based ECL biosensing using Chox as the model enzyme.
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Affiliation(s)
- Hongmei Chen
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Qiyi Lu
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Jiayao Liao
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Ruo Yuan
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Shihong Chen
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
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Serum ethanolamine plasmalogens improve detection of cognitive impairment among elderly with high excretion levels of urinary myo-inositol: A cross-sectional study. Clin Chim Acta 2015; 453:134-40. [PMID: 26680299 DOI: 10.1016/j.cca.2015.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 11/22/2015] [Accepted: 12/04/2015] [Indexed: 01/22/2023]
Abstract
BACKGROUND Several reports have implicated myo-inositol (MI) in myelin formation. We hypothesized that MI is involved in this process through facilitating the biosynthesis of ethanolamine plasmalogens (PlsEtns), which are the major component of myelin membranes, and essential for myelin formation and function. Excessive MI urinary excretion possibly causes PlsEtn deficiency, leading to demyelinating diseases including dementia. METHODS We examined the association between cognitive impairment, serum levels of PlsEtn, and baseline levels of urinary MI excretion, in the enrollment of 55 memory clinic outpatients and 107 cognitively normal elderly. RESULTS Serum PlsEtns were independently associated with cognitive impairment, and significantly reduced in memory clinic outpatients, especially in those with high urinary MI, as compared to normal elderly. On the other hand, there was no direct association between urinary MI and cognitive impairment, but urinary MI was significantly associated with serum hemoglobin A1c and amyloid β 1-40. The interaction between PlsEtn and urinary MI for cognitive impairment was statistically confirmed, and their combined usage improved diagnosis of cognitive impairment. CONCLUSIONS We proposed the involvement of MI and PlsEtn in cognitive impairment pathology. In conclusion, serum PlsEtn may be useful in detecting cognitive decline among elderly with hyperglycemia.
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Sakasegawa SI, Maeba R, Murayama K, Matsumoto H, Sugimori D. Hydrolysis of plasmalogen by phospholipase A1 from Streptomyces albidoflavus for early detection of dementia and arteriosclerosis. Biotechnol Lett 2015; 38:109-16. [PMID: 26354853 DOI: 10.1007/s10529-015-1955-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 09/01/2015] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To obtain an ethanolamine plasmalogen (PlsEtn)-hydrolyzing enzyme and to develop an assay that would help determine PlsEtn concentrations in human serum as an indicator of Alzheimer-type dementia and of arteriosclerosis. RESULTS Phospholipase A1s, SaPLA1 and SvPLA1 from, respectively, Streptomyces albidoflavus NA297 and S. avermitilis JCM5070-but not phospholipase B from Streptomyces sp. NA684, PLA2-Nagase from S. avermitilis, PLA2IIL from S. violaceoruber nor LIPOMOD 699L (porcine phospholipase)-hydrolyzed choline plasmalogen (PlsCho) and PlsEtn (PlsCho preferred over PlsEtn). Using a combination of SaPLA1, lysoplasmalogen-specific phospholipase D (LyPls-PLD), with amine oxidase, an end-point assay was developed for measuring serum PlsEtn concentration. The standard curve, generated using various amounts of PlsEtn in this assay, was linear between 0 and 0.2 mM. PlsEtn concentrations in forty-seven serum samples, determined independently by this enzyme-based assay and (125)I-HPLC method, exhibited a linear relationship, indicating that the assay is suitable for fast and accurate measurement of serum PlsEtn concentration. CONCLUSIONS An assay, developed using SaPLA1, LyPls-PLD, and AOX, selectively measured PlsEtn levels in blood samples. This assay could be a useful diagnostic tool for early stage detection of diseases such as Alzheimer-type dementia and arteriosclerosis.
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Affiliation(s)
- Shin-ich Sakasegawa
- Asahi Kasei Pharma Corp., 632-1 Mifuku, Izunokuni, Shizuoka, 410-2321, Japan.
| | - Ryota Maeba
- Department of Biochemistry, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi-Ku, Tokyo, 173-8605, Japan.
| | - Kazutaka Murayama
- Division of Biomedical Measurements and Diagnostics, Graduate School of Biomedical Engineering, Tohoku University, 2-1 Seiryo, Aoba, Sendai, 980-8575, Japan.
| | - Hideyuki Matsumoto
- Asahi Kasei Pharma Corp., 632-1 Mifuku, Izunokuni, Shizuoka, 410-2321, Japan.
| | - Daisuke Sugimori
- Department of Symbiotic Systems Science and Technology, Graduate School of Symbiotic Systems Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima, 960-1296, Japan.
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Maeba R, Nishimukai M, Sakasegawa SI, Sugimori D, Hara H. Plasma/Serum Plasmalogens: Methods of Analysis and Clinical Significance. Adv Clin Chem 2015; 70:31-94. [PMID: 26231485 DOI: 10.1016/bs.acc.2015.03.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Age-related diseases, such as atherosclerosis and dementia, are associated with oxidative stress and chronic inflammation. Peroxisome dysfunction may be related to aging and age-related pathologies, possibly through the derangement of redox homeostasis. The biosyntheses of plasmalogens (Pls), a subclass of glycerophospholipids, are primarily regulated by peroxisomes. Thus, plasma Pls may reflect the systemic functional activity of peroxisomes and serve as potential biomarkers for diseases related to oxidative stress and aging. Recently, we have established three promising analytical methods for plasma/serum Pls using high-performance liquid chromatography with radioactive iodine, liquid chromatography-tandem mass spectrometry, and enzymatic assay. These methods were validated and used to obtain detailed molecular information regarding these molecules. In cross-sectional studies on asymptomatic, coronary artery disease, and elderly dementia individuals, we found that serum choline Pls, particularly those containing oleic and linoleic acid in the sn-2 position of the glycerol backbone, may serve as reliable antiatherogenic biomarkers. Furthermore, we also found that serum ethanolamine Pls were effective in discriminating cognitive impairment. These results support our hypothesis and further studies are clearly needed to elucidate Pls pathophysiologic significance.
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Nishimukai M, Maeba R, Ikuta A, Asakawa N, Kamiya K, Yamada S, Yokota T, Sakakibara M, Tsutsui H, Sakurai T, Takahashi Y, Hui SP, Chiba H, Okazaki T, Hara H. Serum choline plasmalogens—those with oleic acid in sn− 2—are biomarkers for coronary artery disease. Clin Chim Acta 2014; 437:147-54. [DOI: 10.1016/j.cca.2014.07.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 07/07/2014] [Accepted: 07/17/2014] [Indexed: 10/25/2022]
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Yamazaki Y, Kondo K, Maeba R, Nishimukai M, Nezu T, Hara H. Proportion of nervonic acid in serum lipids is associated with serum plasmalogen levels and metabolic syndrome. J Oleo Sci 2014; 63:527-37. [PMID: 24770479 DOI: 10.5650/jos.ess13226] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
An increase in serum plasmalogens (1-O-alk-1-enyl-2-acyl glycerophospholipids), which are endogenous anti-oxidative phospholipids, can potentially prevent age-related diseases such as atherosclerosis and metabolic syndrome (MetS). Very long chain fatty acids (VLCFAs) in plasma may supply the materials for plasmalogen biosynthesis through peroxisomal beta-oxidation. On the other hand, elevated levels of saturated and monounsaturated VLCFAs in plasma appear to be associated with decreased peroxisomal function, and are a symptom of age-related diseases. To reconcile these contradictory findings, we attempted to investigate the relationship between the serum levels of saturated and monounsaturated VLCFAs, clinical and biochemical parameters, and serum levels of plasmalogens in subjects with MetS (n = 117), who were asymptomatic Japanese males over 40 years of age. Fatty acids in serum lipids were quantified using gas chromatography/mass spectrometry (GC/MS). Serum plasmalogen levels were determined by liquid chromatography using radioactive iodine (¹²⁵I-HPLC), and the molecular composition of serum plasmalogens was analyzed by liquid chromatography-tandem mass spectrometry (LC/MS/MS). We found that MetS subjects showed a significant reduction in the proportion of specific saturated and monounsaturated VLCFAs such as behenic acid (C22:0), lignoceric acid (C24:0), and nervonic acid (C24:1) in serum lipids compared to non-MetS subjects. These VLCFAs were positively associated with serum levels of high density lipoprotein cholesterol (HDL-C) as well as plasmalogen-related parameters, and inversely with serum levels of triglyceride (TG) and small dense low density lipoprotein cholesterol (sdLDL-C). In conclusion, the proportion of nervonic acid in serum lipids is associated with serum levels of plasmalogens and with MetS, and probably reflects the peroxisomal dysfunction and enhancement of endoplasmic reticulum (ER) stress seen in common age-related diseases.
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