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Ding D, He X, Agarry IE, Wang Y, Zhou F, Li Y, Kan J, Cai T, Chen K. Profile of Human Milk Phospholipids at Different Lactation Stages with UPLC/Q-TOF-MS: Characterization, Distribution, and Differences. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:6326-6337. [PMID: 37040528 DOI: 10.1021/acs.jafc.2c07512] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Human milk phospholipids are important for the regular growth and development of infants. Ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC/Q-TOF-MS) was employed to qualitatively and quantitatively analyze 277 phospholipid molecular species in 112 human milk samples to obtain a detailed profile of human milk phospholipids along the lactation stage. MS/MS fragmentation patterns of sphingomyelin, phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, and phosphatidylserine were characterized in detail. Phosphatidylcholine is the most dominant group, followed by sphingomyelin. PC(18:0/18:2), SM(d18:1/24:1), PE(18:0/18:0), PS(18:0/20:4), and PI(18:0/18:2) showed the highest average concentration among all of the phosphatidylcholine, sphingomyelin, phosphatidylethanolamine, phosphatidylserine, and phosphatidylinositol molecular species, respectively. The fatty acids attached to the phospholipid molecules were mainly palmitic, stearic, oleic, and linoleic acids, and the plasmalogens decreased along the lactation stage. The increase of sphingomyelins and phosphatidylethanolamines and the decrease of phosphatidylcholines are the key changes from colostrum to transitional milk; the increase of lysophosphatidylcholines and lysophosphatidylethanolamines and the continuous decrease of phosphatidylcholines are the vital changes from transitional milk to mature milk.
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Affiliation(s)
- Desheng Ding
- College of Food Science, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, P. R. China
- Chongqing Key Laboratory of Specialty Food Co-built by Sichuan and Chongqing, Chongqing 400715, P. R. China
| | - Xiaoling He
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P. R. China
| | - Israel Emiezi Agarry
- College of Food Science, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, P. R. China
- Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing 400715, P. R. China
- Chongqing Key Laboratory of Specialty Food Co-built by Sichuan and Chongqing, Chongqing 400715, P. R. China
| | - Yuankai Wang
- College of Food Science, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, P. R. China
- Chongqing Key Laboratory of Specialty Food Co-built by Sichuan and Chongqing, Chongqing 400715, P. R. China
| | - Fenglan Zhou
- College of Food Science, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, P. R. China
- Chongqing Key Laboratory of Specialty Food Co-built by Sichuan and Chongqing, Chongqing 400715, P. R. China
| | - Yunchang Li
- College of Food Science, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, P. R. China
- Chongqing Key Laboratory of Specialty Food Co-built by Sichuan and Chongqing, Chongqing 400715, P. R. China
| | - Jianquan Kan
- College of Food Science, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, P. R. China
- Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing 400715, P. R. China
- Chongqing Key Laboratory of Specialty Food Co-built by Sichuan and Chongqing, Chongqing 400715, P. R. China
| | - Tian Cai
- School of Chemistry and Chemical Engineering, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, P. R. China
| | - Kewei Chen
- College of Food Science, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, P. R. China
- Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing 400715, P. R. China
- Chongqing Key Laboratory of Specialty Food Co-built by Sichuan and Chongqing, Chongqing 400715, P. R. China
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Zeng L, Ma B, Yang S, Zhang M, Wang J, Liu M, Chen J. Role of autophagy in lysophosphatidylcholine-induced apoptosis in mouse Leydig cells. ENVIRONMENTAL TOXICOLOGY 2022; 37:2756-2763. [PMID: 36214341 DOI: 10.1002/tox.23634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 07/10/2022] [Accepted: 07/21/2022] [Indexed: 06/16/2023]
Abstract
Lysophosphatidylcholine (LPC), a major class of glycerophospholipids ubiquitously present in most tissues, plays a dominant role in many diseases, while it is still unknown about the potential mechanism of LPC affecting the testicular Leydig cells. In the present study, mouse TM3 Leydig cells in vitro were treated with LPC for 48 h. LPC was found to significantly induce apoptosis and oxidative stress of mouse TM3 Leydig cells; while inhibition of oxidative stress by N-acetyl-L-cysteine, an inhibitor of oxidative stress, could rescue the induction of apoptosis, indicating that LPC induced apoptosis of mouse TM3 Leydig cells via oxidative stress. Interestingly, LPC was showed to inhibit autophagy; however, induction of autophagy by rapamycin significantly alleviated the induction of apoptosis by LPC. Taken together, oxidative stress was involved in LPC-induced apoptosis of mouse TM3 Leydig cells, and autophagy might play a protective role in LPC-induced apoptosis.
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Affiliation(s)
- Lin Zeng
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
- Nanchang Emergency Center, Nanchang, China
| | - Bingchun Ma
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Si Yang
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Meijuan Zhang
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Jinglei Wang
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Mengling Liu
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
- Nursing School of Jiujiang University, Jiujiang, China
| | - Jiaxiang Chen
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
- Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang, China
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Kim SR, Heo JI, Park JW, Kang CM, Kim KS. Radiation-induced lipoprotein-associated phospholipase A2 increases lysophosphatidylcholine and induces endothelial cell damage. Toxicology 2021; 458:152841. [PMID: 34216699 DOI: 10.1016/j.tox.2021.152841] [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: 05/04/2021] [Revised: 06/15/2021] [Accepted: 06/22/2021] [Indexed: 10/21/2022]
Abstract
The cardiotoxicity of various anticancer therapies, including radiotherapy, can lead to cardiovascular complications. These complications can range from damaging cardiac tissues within the irradiation field to increasing the long-term risks of developing heart failure, coronary artery disease, and myocardial infarction. We analyzed radiation-induced metabolites capable of mediating critical biological processes, such as inflammation, senescence, and apoptosis. Previously, by applying QTOF-MASS analysis to irradiated human fibroblasts, we identified that metabolite sets of lysophosphatidylcholine (LPC) were increased in these cells. In this study, radiation-induced LPC accumulation in human aortic endothelial cells (HAECs) increased reactive oxygen species (ROS) production and senescence-associated-beta-galactosidase staining, in addition to decreasing their tube-forming ability. Knockdown of lipoprotein-associated phospholipase A2 (Lp-PLA2) with small interfering RNA (siRNA) inhibited the increased LPC production induced by radiation, and reduced the radiation-induced cell damage produced by ROS and oxidized low-density lipoprotein (LDL). Lp-PLA2 depletion abolished the induction of proinflammatory factors, such as interleukin 1β, tumor necrosis factor-alpha, matrix metalloproteinase 2, and matrix metalloproteinase 9, as well as adhesion molecules, such as intercellular adhesion molecule 1 (ICAM-1) and E-selection. Likewise, we showed that Lp-PLA2 expression was upregulated in the vasculature of irradiated rat, resulting in increased LPC production and LDL oxidation. Our data demonstrate that radiation-induced LPC production is a potential risk factor for cardiotoxicity that is mediated by Lp-PLA2 activity, suggesting that LPC and Lp-PLA2 offer potential diagnostic and therapeutic approaches to cardiovascular damage during radiotherapy.
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Affiliation(s)
- So-Ra Kim
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, 01812, Republic of Korea; School of Radiological and Medico-Oncological Sciences, University of Science and Technology, Daejeon, 34054, Republic of Korea
| | - Jong-Ik Heo
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, 01812, Republic of Korea
| | - Jeong-Woo Park
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, 01812, Republic of Korea
| | - Chang-Mo Kang
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, 01812, Republic of Korea; School of Radiological and Medico-Oncological Sciences, University of Science and Technology, Daejeon, 34054, Republic of Korea.
| | - Kwang Seok Kim
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, 01812, Republic of Korea; School of Radiological and Medico-Oncological Sciences, University of Science and Technology, Daejeon, 34054, Republic of Korea.
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Meng Y, Du Z, Li Y, Wang L, Gao P, Gao X, Li C, Zhao M, Jiang Y, Tu P, Guo X. Integration of Metabolomics With Pharmacodynamics to Elucidate the Anti-myocardial Ischemia Effects of Combination of Notoginseng Total Saponins and Safflower Total Flavonoids. Front Pharmacol 2018; 9:667. [PMID: 29988484 PMCID: PMC6026671 DOI: 10.3389/fphar.2018.00667] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 06/04/2018] [Indexed: 01/20/2023] Open
Abstract
Notoginseng (Sanqi), the roots and rhizomes of Panax notoginseng and safflower, the flowers of Carthamus tinctorius, are widely used traditional Chinese medicines (TCMs) for the treatment of cardiovascular diseases. Positive evidences have fueled growing acceptance for cardioprotective effects of the combination of the notoginseng total saponins and safflower total flavonoids (CNS) against myocardial ischemia (MI). However, the underlying cardioprotective mechanisms of CNS are still obscured. Metabolomics is a comprehensive tool for investigating biological mechanisms of disease, monitoring therapeutic outcomes, and advancing drug discovery and development. Herein, we investigated the cardioprotective effects of CNS on the isoproterenol (ISO)-induced MI rats by using plasma and urine metabolomics based on ultra-performance liquid chromatography coupled with quadrupole-time of flight mass spectrometry (UPLC-Q-TOF/MS) and multiple pharmacodynamics approaches. The results showed that pretreatment with CNS could attenuate the cardiac injury resulting from ISO, as evidenced by decreasing the myocardial infarct size, converting the echocardiographic, histopathological, and plasma biochemical abnormalities, and reversing the perturbations of plasma and urine metabolic profiles, particularly for the 55.0 mg/kg dosage group. In addition, 44 metabolites were identified as the potential MI biomarkers, mainly including a range of free fatty acids (FFAs), sphingolipids, and glycerophospholipids. CNS pretreatment group may robustly ameliorate these potential MI-related biomarkers. The accumulation of LysoPCs and FFAs, caused by PLA2, may activate NF-κB pathway and increase proinflammatory cytokines. However, our results showed that CNS at 55.0 mg/kg dosage could maximally attenuate the NF-κB signaling pathway, depress the expressions of TNF-α, IL-6, IL-1β, and PLA2. The results suggested that the anti-inflammatory property of CNS may contribute to its cardioprotection against MI. Our results demonstrate that the integrating of metabolomics with pharmacodynamics provides a reasonable approach for understanding the therapeutic effects of TCMs and CNS provide a potential candidate for prevention and treatment of MI.
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Affiliation(s)
- Yuqing Meng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Zhiyong Du
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Yan Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Lichao Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Peng Gao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Xiaoyan Gao
- School of Chinese Material Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Chun Li
- Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Mingbo Zhao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Yong Jiang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Pengfei Tu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Xiaoyu Guo
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
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Yang X, Li Y, Li Y, Ren X, Zhang X, Hu D, Gao Y, Xing Y, Shang H. Oxidative Stress-Mediated Atherosclerosis: Mechanisms and Therapies. Front Physiol 2017; 8:600. [PMID: 28878685 PMCID: PMC5572357 DOI: 10.3389/fphys.2017.00600] [Citation(s) in RCA: 255] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 08/03/2017] [Indexed: 12/14/2022] Open
Abstract
Atherogenesis, the formation of atherosclerotic plaques, is a complex process that involves several mechanisms, including endothelial dysfunction, neovascularization, vascular proliferation, apoptosis, matrix degradation, inflammation, and thrombosis. The pathogenesis and progression of atherosclerosis are explained differently by different scholars. One of the most common theories is the destruction of well-balanced homeostatic mechanisms, which incurs the oxidative stress. And oxidative stress is widely regarded as the redox status realized when an imbalance exists between antioxidant capability and activity species including reactive oxygen (ROS), nitrogen (RNS) and halogen species, non-radical as well as free radical species. This occurrence results in cell injury due to direct oxidation of cellular protein, lipid, and DNA or via cell death signaling pathways responsible for accelerating atherogenesis. This paper discusses inflammation, mitochondria, autophagy, apoptosis, and epigenetics as they induce oxidative stress in atherosclerosis, as well as various treatments for antioxidative stress that may prevent atherosclerosis.
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Affiliation(s)
- Xinyu Yang
- Guang'anmen Hospital, Chinese Academy of Chinese Medical SciencesBeijing, China.,Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital, Beijing University of Chinese MedicineBeijing, China
| | - Yang Li
- Department of Cardiology, General Hospital of People's Liberation ArmyBeijing, China
| | - Yanda Li
- Guang'anmen Hospital, Chinese Academy of Chinese Medical SciencesBeijing, China
| | - Xiaomeng Ren
- Guang'anmen Hospital, Chinese Academy of Chinese Medical SciencesBeijing, China.,Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital, Beijing University of Chinese MedicineBeijing, China
| | - Xiaoyu Zhang
- Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital, Beijing University of Chinese MedicineBeijing, China
| | - Dan Hu
- Masonic Medical Research LaboratoryUtica, NY, United States
| | - Yonghong Gao
- Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital, Beijing University of Chinese MedicineBeijing, China
| | - Yanwei Xing
- Guang'anmen Hospital, Chinese Academy of Chinese Medical SciencesBeijing, China
| | - Hongcai Shang
- Key Laboratory of Chinese Internal Medicine of the Ministry of Education, Dongzhimen Hospital, Beijing University of Chinese MedicineBeijing, China
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Mendes MT, Carvalho-Costa TM, da Silva MV, Anhê ACBM, Guimarães RM, da Costa TA, Ramirez LE, Rodrigues V, Oliveira CJF. Effect of the saliva from different triatomine species on the biology and immunity of TLR-4 ligand and Trypanosoma cruzi-stimulated dendritic cells. Parasit Vectors 2016; 9:634. [PMID: 27938380 PMCID: PMC5148907 DOI: 10.1186/s13071-016-1890-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 11/16/2016] [Indexed: 02/07/2023] Open
Abstract
Background Triatomines are blood-sucking vectors of Trypanosoma cruzi, the causative agent of Chagas disease. During feeding, triatomines surpass the skin host response through biomolecules present in their saliva. Dendritic cells (DCs) play a crucial role in the induction of the protection to aggressive agents, including blood-sucking arthropods. Here, we evaluated if salivary components of triatomines from different genera evade the host immunity by modulating the biology and the function of LPS- or T. cruzi-stimulated DCs. Methods Saliva of Panstrongylus lignarius, Meccus pallidipennis, Triatoma lecticularia and Rhodnius prolixus were obtained by dissection of salivary glands and the DCs were obtained from the differentiation of mouse bone marrow precursors. Results The differentiation of DCs was inhibited by saliva of all species tested. Saliva differentially inhibited the expression of MHC-II, CD40, CD80 and CD86 in LPS-matured DCs. Except for the saliva of R. prolixus, which induced IL-6 cytokine production, TNF-α, IL-12 and IL-6 were inhibited by the saliva of the other three tested species and IL-10 was increased in all of them. Saliva per se, also induced the production of IL-12, IL-6 and IL-10. Only the saliva of R. prolixus induced DCs apoptosis. The presence of PGE2 was not detected in the saliva of the four triatomines studied. Finally, T. cruzi invasion on DCs is enhanced by the presence of the triatomine saliva. Conclusions These results demonstrate that saliva from different triatomine species exhibit immunomodulatory effects on LPS and T. cruzi-stimulated DCs. These effects could be related to hematophagy and transmission of T. cruzi during feeding. Electronic supplementary material The online version of this article (doi:10.1186/s13071-016-1890-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Maria Tays Mendes
- Department of Biological Sciences, University of Texas at El Paso, El Paso, TX, USA.,Laboratory of Immunology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | | | - Marcos Vinicius da Silva
- Laboratory of Immunology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil.
| | | | - Rafaela Mano Guimarães
- Laboratory of Immunology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Thiago Alvares da Costa
- Laboratory of Immunology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Luis Eduardo Ramirez
- Laboratory of Immunology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Virmondes Rodrigues
- Laboratory of Immunology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
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Li YF, Li RS, Samuel SB, Cueto R, Li XY, Wang H, Yang XF. Lysophospholipids and their G protein-coupled receptors in atherosclerosis. Front Biosci (Landmark Ed) 2016; 21:70-88. [PMID: 26594106 DOI: 10.2741/4377] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Lysophospholipids (LPLs) are bioactive lipid-derived signaling molecules generated by the enzymatic and chemical processes of regiospecific phospholipases on substrates such as membrane phospholipids (PLs) and sphingolipids (SLs). They play a major role as extracellular mediators by activating G-protein coupled receptors (GPCRs) and stimulating diverse cellular responses from their signaling pathways. LPLs are involved in various pathologies of the vasculature system including coronary heart disease and hypertension. Many studies suggest the importance of LPLs in their association with the development of atherosclerosis, a chronic and severe vascular disease. This paper focuses on the pathophysiological effects of different lysophospholipids on atherosclerosis, which may promote the pathogenesis of myocardial infarction and strokes. Their atherogenic biological activities take place in vascular endothelial cells, vascular smooth muscle cells, fibroblasts, monocytes and macrophages, dendritic cells, T-lymphocytes, platelets, etc.
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Affiliation(s)
- Ya-Feng Li
- Centers for Metabolic Disease Research, Cardiovascular Research and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, PA 19140, USA ; Department of Nephrology and Hemodialysis Center, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Rong-Shan Li
- Department of Nephrology and Hemodialysis Center, Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, China
| | - Sonia B Samuel
- Centers for Metabolic Disease Research, Cardiovascular Research and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, PA 19140, USA
| | - Ramon Cueto
- Centers for Metabolic Disease Research, Cardiovascular Research and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, PA 19140, USA
| | - Xin-Yuan Li
- Centers for Metabolic Disease Research, Cardiovascular Research and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, PA 19140, USA
| | - Hong Wang
- Centers for Metabolic Disease Research, Cardiovascular Research and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, PA 19140, USA
| | - Xiao-Feng Yang
- Centers for Metabolic Disease Research, Cardiovascular Research and Thrombosis Research, Department of Pharmacology, Temple University School of Medicine, Philadelphia, PA 19140, USA
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Akerele OA, Cheema SK. Fatty acyl composition of lysophosphatidylcholine is important in atherosclerosis. Med Hypotheses 2015; 85:754-60. [PMID: 26604024 DOI: 10.1016/j.mehy.2015.10.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/24/2015] [Accepted: 10/14/2015] [Indexed: 12/11/2022]
Abstract
Atherosclerosis is a major cause of death for mankind. Although the pathophysiology of atherosclerosis is a complex and multifactorial process, growing body of evidence has identified phospholipids-mediated signaling as an important factor in the induction and progression of atherosclerosis. Lysophosphatidylcholine (LPC) is a major phospholipid in oxidized low-density lipoprotein, and is generally considered to be atherogenic. However, some studies have shown anti-atherogenic properties of LPC. The controversial findings surrounding the pro- or anti-atherogenic properties of LPC appear to be due to the chain length and the degree of saturation of the fatty acyl moiety of LPC. Studies have suggested that the presence of omega (n)-polyunsaturated fatty acids (PUFA) at the sn-1 position of LPC modulates the inflammatory response thereby making LPC anti-atherogenic. We have recently shown that feeding a diet high in n-3 PUFA resulted in the enrichment of LPC in both plasma and liver of C57BL/6 mice with n-3 PUFA. Others have also shown that supplementation with fish oil leads to preferential incorporation of n-3 PUFA into LPC. We also found that plasma obtained from mice fed a diet high in n-3 PUFA showed higher cholesterol efflux capacity compared to animals fed a low n-3 PUFA diet, despite no changes in high-density lipoprotein concentrations. We are therefore hypothesizing that n-3 PUFA enriched LPC has anti-atherogenic properties by promoting cholesterol efflux from macrophages and by reducing inflammation. Our anticipated long term objective is to establish that the fatty acyl moiety of LPC can be used as a potential biomarker for the risk of developing atherosclerosis. Validating this hypothesis would have a substantial impact on the public health with respect to early diagnosis of cardiovascular risks, and designing dietary based therapeutic strategies for the prevention and management of atherosclerosis and other heart related diseases.
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The use of sequential staining for detection of heterogeneous intracellular response of individual Jurkat cells to lysophosphatidylcholine. J Immunol Methods 2013; 387:96-106. [DOI: 10.1016/j.jim.2012.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 09/29/2012] [Accepted: 10/04/2012] [Indexed: 12/16/2022]
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Vereyken EJF, Fluitsma DM, Bolijn MJ, Dijkstra CD, Teunissen CE. Anin vitromodel for de- and remyelination using lysophosphatidyl choline in rodent whole brain spheroid cultures. Glia 2009; 57:1326-40. [DOI: 10.1002/glia.20852] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Foulds LM, Boysen RI, Crane M, Yang Y, Muir JA, Smith AI, de Kretser DM, Hearn MTW, Hedger MP. Molecular identification of lyso-glycerophosphocholines as endogenous immunosuppressives in bovine and rat gonadal fluids. Biol Reprod 2008; 79:525-36. [PMID: 18509166 DOI: 10.1095/biolreprod.107.064386] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The ability of the gametes to escape detection by the immune system is vital to successful human reproduction. Furthermore, the observed capacity of the testis in some species to support tissue grafts without rejection (immunological privilege) indicates that spermatogenic cells are protected by local immunoregulatory mechanisms. One of these mechanisms involves targeting T cells for inactivation and destruction within the testicular environment. Although the fluids of the testis and ovary surrounding the developing gametes contain soluble factors that inhibit T cells, the identity of the molecule(s) responsible for this activity has been unknown. Using a specific T-cell proliferation assay to monitor bioactivity, these molecules were purified from bovine ovarian follicular fluid by methanol extraction and sequential reverse-phase HPLC (RP-HPLC). All purified active fractions coincided with the elution position on RP-HPLC of several small molecules ranging in size from 496 to 522 Da. The same molecules were localized to the immunosuppressive fractions of rat testicular interstitial fluid. The active molecules were identified, using capillary electrophoresis electrospray ionization mass spectroscopy, as lyso-glycerophosphocholines (lyso-GPCs), namely, 1-palmitoyl-sn-glycero-3-phosphocholine, 1-oleoyl-sn-glycero-3-phosphocholine, a 18:2a/lyso-GPC (putatively, 1-linoleoyl-sn-glycero-3-phosphocholine), and a 20:4a/lyso-GPC (putatively, 1-arachidonyl-sn-glycero-3-phosphocholine). Comparison of the bioactivity and mass spectroscopy profiles of two of the purified molecules with their synthetic standards confirmed the identification. These molecules inhibit T-cell proliferation in response to activation and induce apoptosis of these cells in a time- and dose-dependent manner. The emergence of gonadal lyso-GPCs as potential regulators of critical immune events opens up new avenues of inquiry into the origins of autoimmune infertility and more generally into mechanisms of peripheral immunoregulation and the development of novel immunosuppressives.
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Affiliation(s)
- Lynda M Foulds
- Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia
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Zurgil N, Shafran Y, Afrimzon E, Fixler D, Shainberg A, Deutsch M. Concomitant real-time monitoring of intracellular reactive oxygen species and mitochondrial membrane potential in individual living promonocytic cells. J Immunol Methods 2006; 316:27-41. [PMID: 17011571 DOI: 10.1016/j.jim.2006.07.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2006] [Revised: 07/12/2006] [Accepted: 07/12/2006] [Indexed: 11/23/2022]
Abstract
Reactive oxygen species (ROS) have recently been shown to be involved in multiple physiological responses through modulation of signaling pathways. Inappropriate production of these radicals, and their metabolites, leads to the development of various pathologies. Free radicals can induce both positive and negative effects in cells, and their metabolic pathways are very complex. Hence, it is crucial to be able to simultaneously and directly determine their production dynamics and concentrations in individual living cells, in physiological or pathological states, and in response to drugs. The aim of the present study was to monitor in real time the rates of ROS generation in promonocytic cells upon stimulation with hydrogen peroxide and oxidized lipid. Quantitative detection of intracellular ROS concentration in intact living U937 cells was performed by fluorescence intensity (FI) and polarization (FP) measurements utilizing the Optical LiveCell Array technology. The "dihydro" derivative probes of fluorescein (DCF-DA) and rhodamine (DHR123) were used to assess the intracellular levels of ROS. Each probe molecule exhibited a characteristic FI and FP in its non-fluorescent or oxidized form. Analysis of the temporal relationship between the kinetics of ROS generation and the onset of changes in mitochondrial membrane potential shows high variability within a cell population with regard to both processes. The data demonstrated that temporal measurement of ROS generation, in identifiable individual cells, reveals kinetic behavior that otherwise would be undetected.
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Affiliation(s)
- Naomi Zurgil
- The Biophysical Interdisciplinary Jerome Schottenstein Center for the Research and the Technology of the Cellome, Department of Physics, Bar-Ilan University, Ramat Gan 52900, Israel
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