1
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Lu L, Li J, Zhang L, Zhang Y, Li Z, Lan J, Zeng R, Fang S, Zhang T, Ding Y. A rapid quantitative UPLC-MS/MS method for analysis of key regulatory oxysterols in biological samples for liver cancer. J Steroid Biochem Mol Biol 2024; 243:106577. [PMID: 38971336 DOI: 10.1016/j.jsbmb.2024.106577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 06/27/2024] [Accepted: 07/04/2024] [Indexed: 07/08/2024]
Abstract
An UPLC-APCI-MS/MS method was developed for the simultaneous determination of cholesterol, 7-dehydrocholesterol (7DHC) and eight oxysterols including 27-hydroxycholesterol (27OHC), 7α-hydroxycholesterol (7αOHC), 7β-hydroxycholesterol (7βOHC), 24S-hydroxycholesterol (24SOHC), 25-hydroxycholesterol (25OHC), 7α,24S-dihydroxycholesterol (7α,24SdiOHC), 7α,25-dihydroxycholesterol (7α,25diOHC), and 7α,27-dihydroxycholesterol (7α,27diOHC). It has been used for quantitative analysis of cholesterol, 7DHC and eight oxysterols in hepatocellular carcinoma (HCC) cells, plasma and tumor tissue samples. And the above compounds were extracted from the biological matrix (plasma and tissue) using liquid-liquid extraction with hexane/isopropanol after saponification to cleave the steroids from their esterified forms without further derivatization. Then cholesterol, 7DHC and oxysterols were separated on a reversed phase column (Agilent Zorbax Eclipse plus, C18) within 8 min using a gradient elution with 0.1 % formic acid in H2O and methanol and detected by an APCI triple quadrupole mass spectrometer. The lower limit of quantification (LLOQ) of the cholesterol, 7DHC and oxysterols ranged from 3.9 ng/mL to 31.25 ng/mL, and the recoveries ranged from 83.0 % to 113.9 %. Cholesterol, 7DHC and several oxysterols including 27OHC, 7αOHC and 7βOHC were successfully quantified in HCC cells, plasma, tissues and urine of HCC mice. Results showed that 27OHC was at high levels in three kind of HCC cells and tumor tissues as well as plasma samples from both HepG2 and Huh7 bearing mice model,and the high levels of 27OHC in tumors were associated with HCC development. Moreover, the levels of cholesterol in HCC cells and tumor issues varied in different HCC cells and mice model. Oxysterols profiling in biological samples might provide complementary information in cancer diagnosis.
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Affiliation(s)
- Lu Lu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; National Innovation Platform for medical industry-education integration, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Jie Li
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Lijuan Zhang
- National Innovation Platform for medical industry-education integration, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Yong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Zhe Li
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; The MOE Innovation Centre for Basic Medicine Research on Qi-Blood TCM Theories, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Jinshuai Lan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; The MOE Innovation Centre for Basic Medicine Research on Qi-Blood TCM Theories, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Ruifeng Zeng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Shiyuan Fang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Tong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Yue Ding
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; National Innovation Platform for medical industry-education integration, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; The MOE Innovation Centre for Basic Medicine Research on Qi-Blood TCM Theories, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
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2
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Kure T, Ochiai R, Sakai H. Stability of Liposomal Membrane of Hemoglobin-Vesicles (Artificial Red Cells) for Over Years of Storage Evaluated Using Liquid Chromatography-Mass Spectrometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12264-12275. [PMID: 38804272 DOI: 10.1021/acs.langmuir.4c01403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Hemoglobin-Vesicles (Hb-V) are artificial oxygen carriers encapsulating a purified and concentrated Hb solution in liposomes composed of 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC), cholesterol, 1,5-O-dihexadecyl-N-succinyl-l-glutamate (DHSG), and 1,2-distearoyl-sn-glycero-3-phosphatidylethanolamine-N-poly(ethylene glycol) (PEG5000) (DSPE-PEG). The safety and efficacy of Hb-V have been studied extensively by both preclinical and clinical test methods. Deoxygenation of Hb-V prevents autoxidation of Hb and can extend its shelf life to 2 years at room temperature. However, the lipid components raise concerns about hydrolysis because Hb-V is dispersed in saline. For this study, we attempted to estimate the lipid degradation of long-term stored Hb-V using liquid chromatography-mass spectrometry. Analyses of lipid components extracted from the stored Hb-V showed that the degradation increased depending on the storage temperature. The calculated % remaining of intact lipids of Hb-V were 98.1% after 4 years and 90.4% after 7.2 years at 4 °C, 95.8% after 1 year and 86.7% after 2 years at 25 °C, and 85.6% after 6 months at 40 °C. The main degradation products were lyso-PC and palmitic acid which are hydrolyzed at the ester bond of DPPC. A few hydrolyzed products of DHSG and DSPE-PEG were also detected in Hb-V, but almost no degradation or oxidation products derived from cholesterol could be identified. A shear test of Hb-V at 1500 s-1 showed no significant increase in Hb leakage after storage of 2 years at 25 °C and 6 months at 40 °C. Lipid degradation products including free fatty acids would decrease the pH of the Hb-V dispersion and synergistically facilitate degradation, but it maintained pH 6.5 during 6 years at 4 °C, 2 years at 25 °C, and 3 months at 40 °C because of its high buffering capacity. These results indicate that the storage conditions for Hb-V are appropriate to minimize lipid degradation in the long term.
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Affiliation(s)
- Tomoko Kure
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan
| | - Ryosuke Ochiai
- Pharmaceuticals and Life Sciences Division, Shimadzu Techno-Research, Inc., Kyoto 604-8436, Japan
| | - Hiromi Sakai
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara 634-8521, Japan
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3
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Wang C, Gamage PL, Jiang W, Mudalige T. Excipient-related impurities in liposome drug products. Int J Pharm 2024; 657:124164. [PMID: 38688429 DOI: 10.1016/j.ijpharm.2024.124164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 05/02/2024]
Abstract
Liposomes are widely used in the pharmaceutical industry as drug delivery systems to increase the efficacy and reduce the off-target toxicity of active pharmaceutical ingredients (APIs). The liposomes are more complex drug delivery systems than the traditional dosage forms, and phospholipids and cholesterol are the major structural excipients. These two excipients undergo hydrolysis and/or oxidation during liposome preparation and storage, resulting in lipids hydrolyzed products (LHPs) and cholesterol oxidation products (COPs) in the final liposomal formulations. These excipient-related impurities at elevated concentrations may affect liposome stability and exert biological functions. This review focuses on LHPs and COPs, two major categories of excipient-related impurities in the liposomal formulations, and discusses factors affecting their formation, and analytical methods to determine these excipient-related impurities.
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Affiliation(s)
- Changguang Wang
- Arkansas Laboratory, Office of Regulatory Affairs, U.S. Food and Drug Administration, Jefferson, AR, 72079, USA
| | - Prabhath L Gamage
- Arkansas Laboratory, Office of Regulatory Affairs, U.S. Food and Drug Administration, Jefferson, AR, 72079, USA
| | - Wenlei Jiang
- Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland, 20993, USA.
| | - Thilak Mudalige
- Arkansas Laboratory, Office of Regulatory Affairs, U.S. Food and Drug Administration, Jefferson, AR, 72079, USA.
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4
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Abucayon EG, Sweeney S, Matyas GR. A Reliable Quantification of Cholesterol and 25-Hydroxycholesterol in Liposomal Adjuvant Formulation by Liquid Chromatography High-Resolution Tandem Mass Spectrometry. ACS OMEGA 2024; 9:19637-19644. [PMID: 38708252 PMCID: PMC11064170 DOI: 10.1021/acsomega.4c01524] [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: 02/16/2024] [Revised: 04/01/2024] [Accepted: 04/05/2024] [Indexed: 05/07/2024]
Abstract
Cholesterol, as one of the major components of liposomes, plays a critical role in modulating membrane bilayer permeability, fluidity, and structural stability. Controlling these quality attributes is essential to maintaining the efficacy and fitness of the liposomes in various applications. However, during the manufacture and storage of liposomes, cholesterol has a propensity to undergo oxidative degradation. Hence, an analytical tool that is capable of determining not only the identity and quantity of cholesterol but also its associated degradants is a prerequisite to effective process control and product quality and safety assessments. In this view, a new liquid chromatography electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) method with parallel reaction monitoring (PRM) was developed and qualified to accurately quantify cholesterol and monitor the formation of 25-hydroxycholesterol degradant in liposomal drug formulations without the use of an isotopic internal standard (IS). The method was qualified according to the FDA Quality Guidance for Industry: Q2(R1). Study results showed that the method presents good specificity for cholesterol and 25-hydroxycholesterol detection in the liposomal matrix, good sensitivity characterized by LOD/LOQ in the nanomolar range, and accuracy within the range of 80 to 120%. The described method enables accurate evaluation of in-process and product release samples of Army Liposome Formulation with QS21 (ALFQ).
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Affiliation(s)
- Erwin G. Abucayon
- U.S.
Military HIV Research Program, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, Maryland 20910, United States
- Henry
M. Jackson Foundation for the Advancement of Military Medicine, 6720A Rockledge Drive, Bethesda, Maryland 20817, United States
| | - Scott Sweeney
- Avanti
Polar Lipids, LLC, 700
Industrial Park Drive, Alabaster, Alabama 35007, United States
| | - Gary R. Matyas
- U.S.
Military HIV Research Program, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, Maryland 20910, United States
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5
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Rojas D, Benachenhou S, Laroui A, Aden AA, Abolghasemi A, Galarneau L, Irakoze TJ, Plantefeve R, Bouhour S, Toupin A, Corbin F, Fink G, Mallet PL, Çaku A. Development and validation of a liquid chromatography-tandem mass spectrometry assay to quantify plasma 24(S)-hydroxycholesterol and 27-hydroxycholesterol: A new approach integrating the concept of ion ratio. J Steroid Biochem Mol Biol 2023; 235:106408. [PMID: 37806531 DOI: 10.1016/j.jsbmb.2023.106408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 10/02/2023] [Accepted: 10/05/2023] [Indexed: 10/10/2023]
Abstract
Accurate quantification of 24(S)-hydroxycholesterol and 27-hydroxycholesterol holds substantial biological significance due to their involvement in pivotal cellular processes, encompassing cholesterol homeostasis, inflammatory responses, neuronal signaling, and their potential as disease biomarkers. The plasma determination of these oxysterols is challenging considering their low concentrations and similarities in terms of empirical formulae, molecular structure, and physicochemical properties across all human endogenous plasma oxysterols. To overcome these sensitivity and specificity issues, we developed and validated a quantification method using liquid chromatography coupled to a tandem mass spectrometry instrument. Validation studies were designed inspired by Clinical and Laboratory Standards Institute (CLSI) C62-A Guidelines. The linearity ranged between 20 and 300 nM for both oxysterols with limits of quantification at 20 nM and 30 nM for 24(S)-OHC and 27-OHC, respectively. Inter-day precision coefficient variations (CV) were lower than 10% for both oxysterols. An optimal separation of 25-OHC was obtained from 24(S)-OHC and 27-OHC with a resolution (Rs) > 1.25. The determination and validation of ion ratios for 24(S)-OHC and 27-OHC enabled another quality check in identifying interferents that could impact the quantification. Our developed and validated LC-MS/MS method allows consistent and reliable quantification of human plasmatic 24(S)-OHC and 27-OHC that is warranted in fundamental and clinical research projects.
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Affiliation(s)
- Daniela Rojas
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Sérine Benachenhou
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Asma Laroui
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Amira Abdourahim Aden
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Armita Abolghasemi
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Luc Galarneau
- The Medical Physics Unit, McGill University Health Center, Montreal, QC, Canada
| | - Taratibu Janvière Irakoze
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Rosalie Plantefeve
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Sophie Bouhour
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Amanda Toupin
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - François Corbin
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Guy Fink
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Pierre-Luc Mallet
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Artuela Çaku
- Department of Biochemistry and Functional Genomics, Université de Sherbrooke, Sherbrooke, QC, Canada.
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6
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Poudel A, Gachumi G, Purves R, Badea I, El-Aneed A. Determination of phytosterol oxidation products in pharmaceutical liposomal formulations and plant vegetable oil extracts using novel fast liquid chromatography - Tandem mass spectrometric methods. Anal Chim Acta 2022; 1194:339404. [PMID: 35063161 DOI: 10.1016/j.aca.2021.339404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 12/10/2021] [Accepted: 12/23/2021] [Indexed: 11/26/2022]
Abstract
Phytosterol oxidation products (POPs) formed by the auto-oxidation of phytosterols can lead to negative health consequences. New liquid chromatography-tandem mass spectrometry (LC-MS/MS) quantitative and qualitative approaches were developed. For quantification, sixteen phytosterol oxidation products (POPs) in liposomal formulations; namely 7-keto, 7-hydroxy, 5,6-epoxy, and 5,6-dihydroxy derivatives of brassicasterol, campesterol, stigmasterol, and β-sitosterol were quantified. The method has a short run time of 5 min, achieved on a poroshell C18 column, using isocratic elution. To the best of our knowledge, this is the shortest run time among reported methods for the quantitative analysis of POPs. Atmospheric pressure chemical ionization (APCI) was used, and the mobile phase was composed of acetonitrile/methanol (99:1 v/v). The quantitative method was validated as per the FDA guidelines for linearity, accuracy, precision, selectivity, sensitivity, matrix effect, dilution integrity, and stability. The method was applied for the quantification of POPs in liposomal phytosterol formulations prepared with and without tocopherols, as antioxidants. The formulation process had little impact on the formation of POPs as only 7-ketobrassicasterol was quantified in tested samples. The quantified value of POPs in liposomal samples was insignificant to impart any toxicological effects. Other degradation products such as 7-hydroxy, 5,6-epoxy and 5,6-dihydroxy derivatives of brassicasterol, campesterol and β-sitosterol were below the lower limit of quantification. Phytosterol-containing formulations were then assessed for their oxidative stability after microwave exposure for 5 min. The incorporation of tocopherols significantly increased the stability of phytosterols in the liposomal formulations. Finally, LC-MS/MS qualitative identification of phytosterols obtained from extra virgin olive oil was performed. New POPs, namely 7-ketoavenasterol, and 7-ketomethylenecycloartenol were putatively identified, illustrating the applicability of the method to identify POPs with varying structures present in various phytosterol sources. In fact, it is the first time that 7-ketomethylenecycloartenol is reported as a POP.
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Affiliation(s)
- Asmita Poudel
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - George Gachumi
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Randy Purves
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada; Canadian Food Inspection Agency, Saskatoon, SK, Canada
| | - Ildiko Badea
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Anas El-Aneed
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada.
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7
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Liu Y, Yang X, Xiao F, Jie F, Zhang Q, Liu Y, Xiao H, Lu B. Dietary cholesterol oxidation products: Perspectives linking food processing and storage with health implications. Compr Rev Food Sci Food Saf 2021; 21:738-779. [PMID: 34953101 DOI: 10.1111/1541-4337.12880] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 12/23/2022]
Abstract
Dietary cholesterol oxidation products (COPs) are heterogeneous compounds formed during the processing and storage of cholesterol-rich foods, such as seafood, meat, eggs, and dairy products. With the increased intake of COPs-rich foods, the concern about health implications of dietary COPs is rising. Dietary COPs may exert deleterious effects on human health to induce several inflammatory diseases including atherosclerosis, neurodegenerative diseases, and inflammatory bowel diseases. Thus, knowledge regarding the effects of processing and storage conditions leading to formation of COPs is needed to reduce the levels of COPs in foods. Efficient methodologies to determine COPs in foods are also essential. More importantly, the biological roles of dietary COPs in human health and effects of phytochemicals on dietary COPs-induced diseases need to be established. This review summarizes the recent information on dietary COPs including their formation in foods during their processing and storage, analytical methods of determination of COPs, metabolic fate, implications for human health, and beneficial interventions by phytochemicals. The formation of COPs is largely dependent on the heating temperature, storage time, and food matrices. Alteration of food processing and storage conditions is one of the potent strategies to restrict hazardous dietary COPs from forming, including maintaining relatively low temperatures, shorter processing or storage time, and the appropriate addition of antioxidants. Once absorbed into the circulation, dietary COPs can contribute to the progression of several inflammatory diseases, where the absorbed dietary COPs may induce inflammation, apoptosis, and autophagy in cells in the target organs or tissues. Improved intake of phytochemicals may be an effective strategy to reduce the hazardous effects of dietary COPs.
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Affiliation(s)
- Yan Liu
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control, Zhejiang University, Hangzhou, China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou, China.,Ningbo Research Institute, Zhejiang University, Ningbo, China
| | - Xuan Yang
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control, Zhejiang University, Hangzhou, China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou, China.,Ningbo Research Institute, Zhejiang University, Ningbo, China
| | - Fan Xiao
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control, Zhejiang University, Hangzhou, China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou, China.,Ningbo Research Institute, Zhejiang University, Ningbo, China
| | - Fan Jie
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control, Zhejiang University, Hangzhou, China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou, China.,Ningbo Research Institute, Zhejiang University, Ningbo, China
| | - Qinjun Zhang
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control, Zhejiang University, Hangzhou, China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou, China.,Ningbo Research Institute, Zhejiang University, Ningbo, China
| | - Yuqi Liu
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control, Zhejiang University, Hangzhou, China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou, China.,Ningbo Research Institute, Zhejiang University, Ningbo, China
| | - Hang Xiao
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control, Zhejiang University, Hangzhou, China.,Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
| | - Baiyi Lu
- College of Biosystems Engineering and Food Science, National-Local Joint Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture and Rural Affairs, Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control, Zhejiang University, Hangzhou, China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou, China.,Ningbo Research Institute, Zhejiang University, Ningbo, China
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8
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Gachumi G, Poudel A, Wasan KM, El-Aneed A. Analytical Strategies to Analyze the Oxidation Products of Phytosterols, and Formulation-Based Approaches to Reduce Their Generation. Pharmaceutics 2021; 13:pharmaceutics13020268. [PMID: 33669349 PMCID: PMC7920278 DOI: 10.3390/pharmaceutics13020268] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/03/2021] [Accepted: 02/09/2021] [Indexed: 12/12/2022] Open
Abstract
Phytosterols are a class of lipid molecules present in plants that are structurally similar to cholesterol and have been widely utilized as cholesterol-lowering agents. However, the susceptibility of phytosterols to oxidation has led to concerns regarding their safety and tolerability. Phytosterol oxidation products (POPs) present in a variety of enriched and non-enriched foods can show pro-atherogenic and pro-inflammatory properties. Therefore, it is crucial to screen and analyze various phytosterol-containing products for the presence of POPs and ultimately design or modify phytosterols in such a way that prevents the generation of POPs and yet maintains their pharmacological activity. The main approaches for the analysis of POPs include the use of mass spectrometry (MS) linked to a suitable separation technique, notably gas chromatography (GC). However, liquid chromatography (LC)-MS has the potential to simplify the analysis due to the elimination of any derivatization step, usually required for GC-MS. To reduce the transformation of phytosterols to their oxidized counterparts, formulation strategies can theoretically be adopted, including the use of microemulsions, microcapsules, micelles, nanoparticles, and liposomes. In addition, co-formulation with antioxidants, such as tocopherols, may prove useful in substantially preventing POP generation. The main objectives of this review article are to evaluate the various analytical strategies that have been adopted for analyzing them. In addition, formulation approaches that can prevent the generation of these oxidation products are proposed.
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Affiliation(s)
- George Gachumi
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (G.G.); (A.P.)
| | - Asmita Poudel
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (G.G.); (A.P.)
| | - Kishor M. Wasan
- iCo Therapeutics Inc., Vancouver, BC V6Z 2T3, Canada;
- Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Skymount Medical Group Inc., Calgary, AB T3C 0J8, Canada
| | - Anas El-Aneed
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (G.G.); (A.P.)
- Correspondence: ; Tel.: +1-306-966-2013
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9
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Dorakumbura BN, Busetti F, Lewis SW. Analysis of squalene and its transformation by-products in latent fingermarks by ultrahigh-performance liquid chromatography-high resolution accurate mass Orbitrap™ mass spectrometry. Forensic Chem 2020. [DOI: 10.1016/j.forc.2019.100193] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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10
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Quantitative analysis of cholesterol oxidation products and desmosterol in parenteral liposomal pharmaceutical formulations. Int J Pharm 2019; 569:118576. [DOI: 10.1016/j.ijpharm.2019.118576] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 11/19/2022]
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11
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Mass Spectrometry in Advancement of Redox Precision Medicine. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1140:327-358. [PMID: 31347057 DOI: 10.1007/978-3-030-15950-4_19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Redox (portmanteau of reduction-oxidation) reactions involve the transfer of electrons between chemical species in biological processes fundamental to life. It is of outmost importance that cells maintain a healthy redox state by balancing the action of oxidants and antioxidants; failure to do so leads to a multitude of diseases including cancer, diabetes, fibrosis, autoimmune diseases, and cardiovascular and neurodegenerative diseases. From the perspective of precision medicine, it is therefore beneficial to interrogate the redox phenotype of the individual-similar to the use of genomic sequencing-in order to design tailored strategies for disease prevention and treatment. This chapter provides an overview of redox metabolism and focuses on how mass spectrometry (MS) can be applied to advance our knowledge in redox biology and precision medicine.
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Dias IH, Wilson SR, Roberg-Larsen H. Chromatography of oxysterols. Biochimie 2018; 153:3-12. [DOI: 10.1016/j.biochi.2018.05.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 05/04/2018] [Indexed: 12/16/2022]
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13
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Reinicke M, Schröter J, Müller-Klieser D, Helmschrodt C, Ceglarek U. Free oxysterols and bile acids including conjugates - Simultaneous quantification in human plasma and cerebrospinal fluid by liquid chromatography-tandem mass spectrometry. Anal Chim Acta 2018; 1037:245-255. [PMID: 30292299 DOI: 10.1016/j.aca.2018.02.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 02/14/2018] [Accepted: 02/18/2018] [Indexed: 01/19/2023]
Abstract
A liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI(+)-MS/MS) assay was developed and qualified for analyzing 35 analytes of the cholesterol metabolism, including free cholesterol, 17 free, non-esterified oxysterols and 17 free and conjugated bile acids in plasma and cerebrospinal fluid. As internal standards, 25 commercially available stable deuterium-labeled analogs of the analytes were used. Pre-analytical investigations included stability tests of analyte concentrations affected by different anticoagulation additives: lithium heparin-, citrate-, EDTA-K3-stabilized plasma and serum, and the stability in EDTA whole blood at RT. This LC-ESI(+)-MS/MS method was successfully applied for the analysis of paired serum/cerebrospinal fluid samples of patients with and without blood-brain barrier disturbance, as well as of 100 plasma samples of a LIFE-Adult study sub-cohort. A fast and simple sample preparation including protein precipitation and on-line solid-phase extraction was developed. As little as 55 μL of human plasma/serum or cerebrospinal fluid were needed for the analysis. It was possible to separate isomeric oxysterols and bile acids within 23 min using a C18 core-shell column. The assay is capable of quantifying in a linear range of 0.8-250 ng mL-1 for free hydroxycholesterols, 0.2-10 ng mL-1 for dihydroxycholesterols, 0.2-500 ng mL-1 for bile acids and 16-2000 μg mL-1 for cholesterol with acceptable accuracy and precision. In cerebrospinal fluid one free oxysterols, five free and five conjugated bile acids could be quantified. No significant differences between patients with and without blood-brain barrier disturbance were obtained. In the LIFE-Adult sub-cohort two free oxysterols, four free and seven conjugated bile acids could be quantified in EDTA plasma. Men showed significantly higher concentrations of 26-OHC than women (p = 0.035). Furthermore, in women lower levels of cholic acid, glycocholic acid, glycodeoxycholic acid, chenodeoxycholic acid, glycochenodeoxycholic acid, glycoursodeoxycholic acid, glycolithocholic acid and higher levels of taurocholic acid, taurochenodeoxycholic acid, ursodeoxycholic acid/hyodeoxycholic acid were quantified.
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Affiliation(s)
- Madlen Reinicke
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Leipzig University, Liebigstr. 27, 04103 Leipzig, Germany.
| | - Jenny Schröter
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Leipzig University, Liebigstr. 27, 04103 Leipzig, Germany
| | - Daniel Müller-Klieser
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Leipzig University, Liebigstr. 27, 04103 Leipzig, Germany
| | - Christin Helmschrodt
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Leipzig University, Liebigstr. 27, 04103 Leipzig, Germany
| | - Uta Ceglarek
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Leipzig University, Liebigstr. 27, 04103 Leipzig, Germany; LIFE - Leipzig Research Center for Civilization Diseases, Leipzig University, Philipp-Rosenthal-Str. 27, 04103 Leipzig, Germany
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Beck A, Jordan LK, Herlitze S, Amtmann A, Christian J, Brogden G, Adamek M, Naim HY, Maria Becker A. Quantification of sterols from carp cell lines by using HPLC-MS. SEPARATION SCIENCE PLUS 2018. [DOI: 10.1002/sscp.201700021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Alexander Beck
- Institute of Bioprocess Engineering; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
| | - Lisa Katharina Jordan
- Institute of Bioprocess Engineering; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
| | - Simon Herlitze
- Institute of Bioprocess Engineering; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
| | - Anette Amtmann
- Institute of Bioprocess Engineering; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
| | - Juergen Christian
- Bavarian Health and Food Safety Authority; Institute for Animal Health II; Erlangen Germany
| | - Graham Brogden
- Department of Physiological Chemistry; University of Veterinary Medicine; Hannover Germany
| | - Mikolaj Adamek
- Fish Disease Research Unit; Institute of Parasitology; University of Veterinary Medicine; Hannover Germany
| | - Hassan Y. Naim
- Department of Physiological Chemistry; University of Veterinary Medicine; Hannover Germany
| | - Anna Maria Becker
- Institute of Bioprocess Engineering; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
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Fujiwara Y, Hama K, Tsukahara M, Izumi-Tsuzuki R, Nagai T, Ohe-Yamada M, Inoue K, Yokoyama K. Acyl Chain Preference in Foam Cell Formation from Mouse Peritoneal Macrophages. Biol Pharm Bull 2018; 41:86-91. [DOI: 10.1248/bpb.b17-00610] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yuko Fujiwara
- Faculty of Pharmaceutical Sciences, Teikyo University
| | - Kotaro Hama
- Faculty of Pharmaceutical Sciences, Teikyo University
| | | | | | - Toru Nagai
- Faculty of Pharmaceutical Sciences, Teikyo University
| | | | - Keizo Inoue
- Faculty of Pharmaceutical Sciences, Teikyo University
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Rapid determination of cholesterol oxidation products in milk powder based products by reversed phase SPE and HPLC-APCI-MS/MS. Food Chem 2017; 230:604-610. [DOI: 10.1016/j.foodchem.2017.03.080] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 12/23/2016] [Accepted: 03/13/2017] [Indexed: 11/20/2022]
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17
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Fibigr J, Šatínský D, Solich P. A UHPLC method for the rapid separation and quantification of phytosterols using tandem UV/Charged aerosol detection – A comparison of both detection techniques. J Pharm Biomed Anal 2017; 140:274-280. [DOI: 10.1016/j.jpba.2017.03.057] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 03/21/2017] [Accepted: 03/27/2017] [Indexed: 11/26/2022]
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18
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Duong S, Strobel N, Buddhadasa S, Stockham K, Auldist M, Wales B, Orbell J, Cran M. Rapid measurement of phytosterols in fortified food using gas chromatography with flame ionization detection. Food Chem 2016; 211:570-6. [PMID: 27283669 DOI: 10.1016/j.foodchem.2016.05.104] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 04/06/2016] [Accepted: 05/16/2016] [Indexed: 11/30/2022]
Abstract
A novel method for the measurement of total phytosterols in fortified food was developed and tested using gas chromatography with flame ionization detection. Unlike existing methods, this technique is capable of simultaneously extracting sterols during saponification thus significantly reducing extraction time and cost. The rapid method is suitable for sterol determination in a range of complex fortified foods including milk, cheese, fat spreads, oils and meat. The main enhancements of this new method include accuracy and precision, robustness, cost effectiveness and labour/time efficiencies. To achieve these advantages, quantification and the critical aspects of saponification were investigated and optimised. The final method demonstrated spiked recoveries in multiple matrices at 85-110% with a relative standard deviation of 1.9% and measurement uncertainty value of 10%.
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Affiliation(s)
- Samantha Duong
- Australian Government, National Measurement Institute (NMI), 1/153 Bertie Street, Port Melbourne, VIC 3207, Australia; Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
| | - Norbert Strobel
- Australian Government, National Measurement Institute (NMI), 1/153 Bertie Street, Port Melbourne, VIC 3207, Australia
| | - Saman Buddhadasa
- Australian Government, National Measurement Institute (NMI), 1/153 Bertie Street, Port Melbourne, VIC 3207, Australia
| | - Katherine Stockham
- Australian Government, National Measurement Institute (NMI), 1/153 Bertie Street, Port Melbourne, VIC 3207, Australia
| | - Martin Auldist
- Department of Environment and Primary Industry (DEPI), 1301 Hazeldean Road, Ellinbank, VIC 3821, Australia
| | - Bill Wales
- Department of Environment and Primary Industry (DEPI), 1301 Hazeldean Road, Ellinbank, VIC 3821, Australia
| | - John Orbell
- Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
| | - Marlene Cran
- Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia.
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Dumont Q, Bárcenas M, Dossmann H, Bailloux I, Buisson C, Mechin N, Molina A, Lasne F, Rannulu NS, Cole RB. Improved Steroids Detection and Evidence for Their Regiospecific Decompositions Using Anion Attachment Mass Spectrometry. Anal Chem 2016; 88:3585-91. [DOI: 10.1021/acs.analchem.5b04097] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Quentin Dumont
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut
Parisien de Chimie Moléculaire (IPCM), 4 Place Jussieu 75252 Paris Cedex 05, France
| | - Mariana Bárcenas
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut
Parisien de Chimie Moléculaire (IPCM), 4 Place Jussieu 75252 Paris Cedex 05, France
| | - Héloïse Dossmann
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut
Parisien de Chimie Moléculaire (IPCM), 4 Place Jussieu 75252 Paris Cedex 05, France
| | - Isabelle Bailloux
- Agence Française de Lutte Contre le Dopage, Département des Analyses, 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France
| | - Corinne Buisson
- Agence Française de Lutte Contre le Dopage, Département des Analyses, 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France
| | - Nathalie Mechin
- Agence Française de Lutte Contre le Dopage, Département des Analyses, 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France
| | - Adeline Molina
- Agence Française de Lutte Contre le Dopage, Département des Analyses, 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France
| | - Françoise Lasne
- Agence Française de Lutte Contre le Dopage, Département des Analyses, 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France
| | - Nalaka S. Rannulu
- Department
of Chemistry, University of New Orleans, 2000 Lakeshore Drive, New Orleans, Louisiana 70148, United States
| | - Richard B. Cole
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut
Parisien de Chimie Moléculaire (IPCM), 4 Place Jussieu 75252 Paris Cedex 05, France
- Department
of Chemistry, University of New Orleans, 2000 Lakeshore Drive, New Orleans, Louisiana 70148, United States
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Roberg-Larsen H, Vesterdal C, Wilson SR, Lundanes E. Underivatized oxysterols and nanoLC-ESI-MS: A mismatch. Steroids 2015; 99:125-30. [PMID: 25668614 DOI: 10.1016/j.steroids.2015.01.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 01/13/2015] [Accepted: 01/22/2015] [Indexed: 11/26/2022]
Abstract
Due to their non-charged character, liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS) measurements of oxysterols are often performed after derivatization with e.g. charged Girard reagents. However, derivatization reactions are time-consuming and may require numerous steps to remove excess reagent. In addition, extensive sample handling can be associated with cholesterol autoxidation, resulting in analyte artifacts and hence false positives. Nano scale liquid chromatography in combination with electrospray-mass spectrometry (nanoLC-ESI-MS) is a powerful tool for analyzing limited samples, due to substantially increased sensitivity compared to conventional LC-ESI-MS. The signal enhancement may compensate for the poor ionization of the oxysterols; hence we have explored the possibility to quantify oxysterols without derivatization using nanoLC-ESI-MS. Non-derivatized oxysterols and nanoLC were however not compatible, due to persistent and large carry-over. This was attributed to the extended contribution of surface to volume ratio in such miniaturized systems and interactions with the materials of the nanoLC instrumentation (e.g. adsorption to the fused silica tubing). Two contemporary MS instruments (Q-Exactive™ hybrid quadrupole-Orbitrap and TSQ Quantiva™ triple quadrupole) were used. However, both the MS and MS/MS spectra of non-derivatized oxysterols were ambiguous and/or unrepeatable for both of the instruments employed. Derivatizing oxysterols is more cumbersome, but provides more selective and reliable results, and Girard derivatization+nanoLC-ESI-MS continues to be our recommended choice for measuring oxysterols in very limited samples. These investigations also indicate that extra care should be taken to remove lipids prior to nanoLC of other analytes, as adsorbed oxysterols, etc. can compromise analysis.
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Affiliation(s)
- Hanne Roberg-Larsen
- Department of Chemistry, University of Oslo, PO Box 1033 Blindern, NO-0315 Oslo, Norway.
| | - Caroline Vesterdal
- Department of Chemistry, University of Oslo, PO Box 1033 Blindern, NO-0315 Oslo, Norway
| | - Steven Ray Wilson
- Department of Chemistry, University of Oslo, PO Box 1033 Blindern, NO-0315 Oslo, Norway
| | - Elsa Lundanes
- Department of Chemistry, University of Oslo, PO Box 1033 Blindern, NO-0315 Oslo, Norway
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21
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Wang Y, Jiang H, Huang H, Xie Y, Zhao Y, You X, Tang L, Wang Y, Yin W, Qiu P, Yan G, Hu H. Determination of neuroprotective oxysterols in Calculus bovis
, human gallstones, and traditional Chinese medicine preparations by liquid chromatography with mass spectrometry. J Sep Sci 2015; 38:796-803. [DOI: 10.1002/jssc.201400850] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 12/05/2014] [Accepted: 12/10/2014] [Indexed: 01/15/2023]
Affiliation(s)
- Yalong Wang
- Lab of Pharmaceutics; School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou China
| | - Han Jiang
- Lab of Pharmaceutics; School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou China
| | - Huizhi Huang
- Lab of Pharmaceutics; School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou China
| | - Yanqi Xie
- Lab of Pharmaceutics; School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou China
| | - Yunshi Zhao
- Lab of Pharmaceutics; School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou China
| | - Xiuhua You
- Lab of Pharmaceutics; School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou China
| | - Lipeng Tang
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-sen University; Guangzhou China
| | - Youqiong Wang
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-sen University; Guangzhou China
| | - Wei Yin
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-sen University; Guangzhou China
| | - Pengxin Qiu
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-sen University; Guangzhou China
| | - Guangmei Yan
- Department of Pharmacology; Zhongshan School of Medicine; Sun Yat-sen University; Guangzhou China
| | - Haiyan Hu
- Lab of Pharmaceutics; School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou China
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Development of a Reliable Analytical Protocol for the Isolation of Cholesterol Oxidation Products—a Comparison of Different Lipid Extraction and Saponification Methods. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-0034-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Al-Balaa D, Rajchl A, Grégrová A, Ševčík R, Čížková H. DART mass spectrometry for rapid screening and quantitative determination of cholesterol in egg pasta. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:911-917. [PMID: 25230188 DOI: 10.1002/jms.3465] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 07/10/2014] [Accepted: 08/12/2014] [Indexed: 06/03/2023]
Abstract
To ensure that egg-containing products, such as dried eggs and egg pasta, conform to the technological and legislative requirements for egg content, methods are needed to determine the amount of cholesterol in such products. The conventional approach, direct saponification and hexane extraction followed by cholesterol determination by gas chromatography coupled to a flame ionization detector, is very time consuming. Therefore, we developed a rapid method on the basis of direct analysis in real time coupled to time-of-flight mass spectrometry. Samples were prepared simply by solvent extraction followed by extract filtration. The optimization of certain parameters, including the solvent used and direct analysis in real time ionization gas temperature, had a pronounced effect on the intensities of the produced ions, in particular, the molecular and dehydrated ions of cholesterol and its deuterated analog, cholesterol 2,2,3,4,4,6-d(6) which was used as an internal standard. For the developed method, limits of detection and quantification were 0.03 and 0.05 mg g(-1) respectively. The results of the real samples were compared with those obtained using the conventional approach [limit of detection = 0.002 mg g(-1) and limit of quantification = 0.05 mg g(-1)], and it was found that, although the results obtained using the conventional approach were more accurate, our developed method is much simpler and faster, where the time was dramatically reduced by 87% for executing a screening analysis.
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Affiliation(s)
- Dania Al-Balaa
- Department of Food Preservation, Institute of Chemical Technology, Prague, Czech Republic
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Zardetto S, Barbanti D, Rosa MD. Formation of cholesterol oxidation products (COPs) and loss of cholesterol in fresh egg pasta as a function of thermal treatment processing. Food Res Int 2014. [DOI: 10.1016/j.foodres.2014.02.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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A new SPE/GC-fid method for the determination of cholesterol oxidation products. Application to subcutaneous fat from Iberian dry-cured ham. Talanta 2014; 122:58-62. [PMID: 24720962 DOI: 10.1016/j.talanta.2014.01.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 01/10/2014] [Accepted: 01/14/2014] [Indexed: 11/21/2022]
Abstract
A new method for the isolation and analysis of cholesterol oxidation products (COPs) using solid phase extraction (SPE) and silica columns was developed using gas chromatography-flame ion detection (GC-FID). The method comprises of saponification and liquid-liquid extraction of the unsaponifiable fraction prior to the isolation and derivatization of the COPs to trimethylsilyl ethers. The COPs used in this study are cholestane-5α-6α-epoxide, cholestane-3β-5α-6β-triol, 25-hydroxycholesterol and 5-cholesten-3β-ol-7-one. In order to identify the COPs fraction a GC-ion-trap-mass spectrometry experiment were conducted using authentic standards to verify the presence of the COPs. The method was effective at rapidly separating the COPs (25 min run). Calibration curves were linear with the LODs and LOQs bellow 0.03 and 0.07 mgkg(-1) for all cases, respectively. This methodology gave a total recovery for every compound that was used in the study. Betulin was used as an internal standard to monitor the recovery. The method was validated with a standard mixture of COPs. The method has been applied to characterize the COP fraction of subcutaneous fat from Iberian dry-cured ham. Cholestane-5α-6α-epoxide, cholestane-3β-5α-6β-triol, 25-hydroxycholesterol and 5-cholesten-3β-ol-7-one have been identified for the first time in these samples.
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Roberg-Larsen H, Strand MF, Krauss S, Wilson SR. Metabolites in vertebrate Hedgehog signaling. Biochem Biophys Res Commun 2014; 446:669-74. [DOI: 10.1016/j.bbrc.2014.01.087] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 01/18/2014] [Indexed: 12/26/2022]
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Sample preparation: A critical step in the analysis of cholesterol oxidation products. Food Chem 2014; 145:918-26. [DOI: 10.1016/j.foodchem.2013.08.123] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 06/28/2013] [Accepted: 08/28/2013] [Indexed: 11/15/2022]
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28
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Juang YM, She TF, Chen HY, Lai CC. Comparison of CID versus ETD-based MS/MS fragmentation for the analysis of doubly derivatized steroids. JOURNAL OF MASS SPECTROMETRY : JMS 2013; 48:1349-1356. [PMID: 24338890 DOI: 10.1002/jms.3300] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 10/15/2013] [Accepted: 10/20/2013] [Indexed: 06/03/2023]
Abstract
Electrospray ionization coupled with collision-induced dissociation (CID) and tandem mass spectrometry (MS/MS) is a commonly used technique to analyze the chemical composition of steroids. However, steroids are structurally similar compounds, making it difficult to interpret their product-ion spectra. Electron transfer dissociation (ETD), a relatively new technique for protein and peptide fragmentation, has been shown to provide more detailed structural information. In this study, we compared the ability of CID with that of ETD to differentiate between eight 3,20-dioxosteroids that had been derivatizated with a quaternary ammonium salt, Girard reagent P (GirP), at room temperature or after exposure to microwave irradiation to generate doubly charged ions. We found that the derivatization of steroid with GirP hydrazine occurred in less than 10 min when the reaction was carried out in the presence of microwave irradiation compared to 30 min when the reaction was carried out at room temperature. According to the MS/MS spectra, CID provided rich, structurally informative ions; however, the spectra were complex, thereby complicating the peak assignment. In contrast, ETD generated simpler spectra, making it easier to recognize individual peaks. Remarkably, both CID and ETD were allowed to differentiate of steroid isomers, 17α-hydroxyprogesterone (17OHP) and deoxycorticosterone (DOC), but the signature ions obtained from CID were less intense than those generated by ETD, which generated much clearer spectra. These results indicate that ETD in conjunction with CID can provide more structural information for precise characterization of steroids.
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Affiliation(s)
- Yu-Min Juang
- Institute of Molecular Biology, National Chung Hsing University, Taichung, Taiwan
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29
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Helmschrodt C, Becker S, Schröter J, Hecht M, Aust G, Thiery J, Ceglarek U. Fast LC–MS/MS analysis of free oxysterols derived from reactive oxygen species in human plasma and carotid plaque. Clin Chim Acta 2013; 425:3-8. [DOI: 10.1016/j.cca.2013.06.022] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 06/23/2013] [Accepted: 06/24/2013] [Indexed: 02/06/2023]
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30
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Dufresne M, Thomas A, Breault-Turcot J, Masson JF, Chaurand P. Silver-assisted laser desorption ionization for high spatial resolution imaging mass spectrometry of olefins from thin tissue sections. Anal Chem 2013; 85:3318-24. [PMID: 23425078 DOI: 10.1021/ac3037415] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Silver has been demonstrated to be a powerful cationization agent in mass spectrometry (MS) for various olefinic species such as cholesterol and fatty acids. This work explores the utility of metallic silver sputtering on tissue sections for high resolution imaging mass spectrometry (IMS) of olefins by laser desorption ionization (LDI). For this purpose, sputtered silver coating thickness was optimized on an assorted selection of mouse and rat tissues including brain, kidney, liver, and testis. For mouse brain tissue section, the thickness was adjusted to 23 ± 2 nm of silver to prevent ion suppression effects associated with a higher cholesterol and lipid content. On all other tissues, a thickness of at 16 ± 2 nm provided the best desorption/ionization efficiency. Characterization of the species by MS/MS showed a wide variety of olefinic compounds allowing the IMS of different lipid classes including cholesterol, arachidonic acid, docosahexaenoic acid, and triacylglyceride 52:3. A range of spatial resolutions for IMS were investigated from 150 μm down to the high resolution cellular range at 5 μm. The applicability of direct on-tissue silver sputtering to LDI-IMS of cholesterol and other olefinic compounds presents a novel approach to improve the amount of information that can be obtained from tissue sections. This IMS strategy is thus of interest for providing new biological insights on the role of cholesterol and other olefins in physiological pathways or disease.
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Affiliation(s)
- Martin Dufresne
- Department of Chemistry, University of Montreal, Montreal, Quebec, Canada
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Ayciriex S, Regazzetti A, Gaudin M, Prost E, Dargère D, Massicot F, Auzeil N, Laprévote O. Development of a novel method for quantification of sterols and oxysterols by UPLC-ESI-HRMS: application to a neuroinflammation rat model. Anal Bioanal Chem 2012; 404:3049-59. [DOI: 10.1007/s00216-012-6396-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 08/24/2012] [Accepted: 08/29/2012] [Indexed: 10/27/2022]
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32
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Georgiou CA, Kapnissi-Christodoulou CP. Qualitative and Quantitative Determination of COPs in Cypriot Meat Samples Using HPLC Determination of the Most Effective Sample Preparation Procedure. J Chromatogr Sci 2012; 51:286-91. [DOI: 10.1093/chromsci/bms139] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Vicente SJV, Sampaio GR, Ferrari CKB, Torres EAFS. Oxidation of Cholesterol in Foods and Its Importance for Human Health. FOOD REVIEWS INTERNATIONAL 2012. [DOI: 10.1080/87559129.2011.594972] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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34
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A highly specific and sensitive quantification analysis of the sterols in silkworm larvae by high performance liquid chromatography–atmospheric pressure chemical ionization–tandem mass spectrometry. Anal Biochem 2011; 419:123-32. [DOI: 10.1016/j.ab.2011.08.046] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 08/25/2011] [Accepted: 08/25/2011] [Indexed: 11/19/2022]
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35
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Farwanah H, Kolter T, Sandhoff K. Mass spectrometric analysis of neutral sphingolipids: Methods, applications, and limitations. Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1811:854-60. [DOI: 10.1016/j.bbalip.2011.05.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 05/05/2011] [Accepted: 05/24/2011] [Indexed: 10/18/2022]
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36
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Shui G, Cheong WF, Jappar IA, Hoi A, Xue Y, Fernandis AZ, Tan BKH, Wenk MR. Derivatization-independent cholesterol analysis in crude lipid extracts by liquid chromatography/mass spectrometry: applications to a rabbit model for atherosclerosis. J Chromatogr A 2011; 1218:4357-65. [PMID: 21621788 DOI: 10.1016/j.chroma.2011.05.011] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 02/22/2011] [Accepted: 05/08/2011] [Indexed: 10/18/2022]
Abstract
Direct measurement of various sterols in crude lipid extracts in a single experiment from limited biological samples is challenging. Current mass spectrometry (MS) based approaches usually require chemical derivatization before subjecting to MS analysis. Here, we present a derivatization-independent method for analyzing various sterols, including cholesterol and its congeners, using liquid chromatography and atmospheric pressure chemical ionization mass spectrometry. Based on the specific tandem mass spectrometry pattern of cholesterol, multiple reaction monitoring (MRM) transitions were used to quantify free cholesterol and its fatty acyl esters. Several cholesterol oxidation products could also be measured using the upfront liquid chromatography separation and specific MRM transitions. The method was validated alongside established enzymatic assays in measuring total cholesterol. As a proof of concept, we analyzed plasma sterols in rabbits administrated with a high cholesterol diet (HCD) which is a classical atherosclerotic model. Free cholesterol, cholesterol esters, 7-hydroxycholesterol, and 7-ketocholesterol were elevated in plasma of rabbits on HCD. This method could also serve as an excellent tool for quantitative analysis of other sterols such as ergosterol and sitosterol in other organisms beside mammalian. In Saccharomyces cerevisiae, our results indicated dramatic increases of the ratio of ergosterol esters to free ergosterol in both yeh2Δ and tgl1Δ cells, which are consistent with the function of the respective enzymes.
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Affiliation(s)
- Guanghou Shui
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
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37
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Gas chromatography–mass spectrometry-based simultaneous quantitative analytical method for urinary oxysterols and bile acids in rats. Anal Biochem 2011; 408:242-52. [DOI: 10.1016/j.ab.2010.09.031] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 09/17/2010] [Accepted: 09/21/2010] [Indexed: 11/24/2022]
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38
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7-Ketocholesterol and 7-hydroxycholesterol in pork meat and its gravy thermally treated without additives and in the presence of onion and garlic. Meat Sci 2010; 86:976-84. [DOI: 10.1016/j.meatsci.2010.08.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 08/04/2010] [Accepted: 08/09/2010] [Indexed: 12/21/2022]
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39
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Chen LJ, Lu YF, Chien JT, Chen BH. Formation and inhibition of cholesterol oxidation products in tea-leaf eggs during marinating. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:10467-10474. [PMID: 20828157 DOI: 10.1021/jf102487j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The objectives of this study were to develop a GC-MS method for determination of cholesterol oxidation products (COPs) in tea-leaf eggs and study the formation and inhibition of COPs as affected by heating time and various ingredients in marinated juice. The various COPs in egg and juice samples were extracted by a solvent system of chloroform/methanol (2:1, v/v), followed by purification using a silica cartridge and GC-MS for subsequent separation and quantitation, with high recovery ranges from 85.9 to 98.3% and from 83.1-100.1% being obtained for egg and juice, respectively. 5α-Cholestane was shown to be an appropriate internal standard for quantitation. A total of five COPs, including 7-keto, 5,6 β-EP, 7α-OH, 7β-OH, and triol, were formed in tea-leaf eggs during marinating, but not in marinated juice. A peak level of total COPs (2272.2 ng/g) was generated in tea-leaf eggs after 24 h of heating, but reduced to 1068.2 ng/g in 48 h. Both the total phenolic and flavonoid compounds in tea-leaf eggs showed a time-dependent increase during marinating and so did the pH and browning index in tea-leaf eggs and juice. The incorporation of soy sauce or black tea leaf into juice was effective in inhibiting COPs formation in tea-leaf eggs, with the latter being more pronounced than the former. The formation of Maillard reaction products during marinating as well as the presence of total phenolic and total flavonoid in black tea leaf was mainly responsible for COPs reduction in tea-leaf eggs.
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Affiliation(s)
- L J Chen
- Department of Food Science, Fu Jen University, Taipei 242, Taiwan
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40
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Nogueira GC, Costa BZ, Crotti AEM, Bragagnolo N. Synthesis of 7-hydroperoxycholesterol and its separation, identification, and quantification in cholesterol heated model systems. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:10226-10230. [PMID: 20799691 DOI: 10.1021/jf102252r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
7-Hydroperoxycholesterol is considered to be an intermediate compound of the cholesterol oxidation path as the first product formed when cholesterol is oxidized by triplet oxygen. However, there is a limitation on cholesterol mechanism studies because of the lack of 7-hydroperoxycholesterol analytical standard due to its low stability. To verify the formation of hydroperoxides in cholesterol model systems heated at 140, 180, and 220 °C, 7α-hydroperoxycholesterol was synthesized by cholesterol photooxidation followed by rearrangement at room temperature in chloroform. Its structure was confirmed on the basis of 13C NMR and mass spectra obtained by APCI-LC-MS. The synthesized compound was also used as standard for the quantification of 7-hydroperoxycholesterol as the sum of 7α- and 7β-hydroperoxycholesterol. The results demonstrated that 7-hydroperoxycholesterol is the first compound formed when the temperature is lower (140 °C). However, the concentration of the 7-hydroperoxycholesterol depends on the temperature and time of exposure: the higher the time, the higher the amount of 7-hydroperoxycholesterol at lower temperatures, and the lower the time, the lower the amount of 7-hydroperoxycholesterol at higher temperatures (180 and 220 °C). By the formation of 7-hydroperoxycholesterol, the known cholesterol oxidation mechanism in three phases (initiation, propagation, and termination) could be confirmed; once at lower temperatures, the stage of cholesterol oxidation is at initiation, at which hydroperoxide formation predominates.
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Affiliation(s)
- Gislaine C Nogueira
- Department of Food Science, Faculty of Food Engineering, University of Campinas, Campinas, SP, Brazil
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41
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Honda A, Miyazaki T, Ikegami T, Iwamoto J, Yamashita K, Numazawa M, Matsuzaki Y. Highly sensitive and specific analysis of sterol profiles in biological samples by HPLC-ESI-MS/MS. J Steroid Biochem Mol Biol 2010; 121:556-64. [PMID: 20302936 DOI: 10.1016/j.jsbmb.2010.03.030] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2009] [Revised: 01/27/2010] [Accepted: 03/02/2010] [Indexed: 10/19/2022]
Abstract
High-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) is a powerful method for the microanalysis of compounds in biological samples. Compared with gas chromatography-mass spectrometry (GC-MS), this method is more broadly applicable to various compounds and usually does not require a derivatization step before analysis. However, when neutral sterols are analyzed, the sensitivities of usual HPLC-MS/MS method are not superior to those of GC-MS because the sterols are relatively resistant to ionization. In this review, we introduce the recent development of HPLC-MS/MS analysis for the quantification of non-cholesterol sterols. By adding an effective derivatization step to the conventional procedure, sterol analysis by HPLC-MS/MS surpassed that obtained by GC-MS in sensitivity. In addition, sufficient specificity of this method was achieved by selected reaction monitoring (SRM) and thorough chromatographic separation of each sterol.
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Affiliation(s)
- Akira Honda
- Center for Collaborative Research, Tokyo Medical University Ibaraki Medical Center, Ami, Ibaraki 300-0395, Japan
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42
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Morrow MP, Grant A, Mujawar Z, Dubrovsky L, Pushkarsky T, Kiselyeva Y, Jennelle L, Mukhamedova N, Remaley AT, Kashanchi F, Sviridov D, Bukrinsky M. Stimulation of the liver X receptor pathway inhibits HIV-1 replication via induction of ATP-binding cassette transporter A1. Mol Pharmacol 2010; 78:215-25. [PMID: 20479131 DOI: 10.1124/mol.110.065029] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Cholesterol plays an important role in the HIV life cycle, and infectivity of cholesterol-depleted HIV virions is significantly impaired. Recently, we demonstrated that HIV-1, via its protein Nef, inhibits the activity of the major cellular cholesterol transporter ATP binding cassette transporter A1 (ABCA1), suggesting that the virus may use this mechanism to get access to cellular cholesterol. In this study, we investigated the effect on HIV infection of a synthetic liver X receptor (LXR) ligand, N-(2,2,2-trifluoro-ethyl)-N-[4-(2,2,2-trifluoro-1-hydroxy-1-trifluoromethyl-ethyl)-phenyl]-benzenesulfonamide (TO-901317), which is a potent stimulator of ABCA1 expression. We demonstrate that TO-901317 restores cholesterol efflux from HIV-infected T lymphocytes and macrophages. TO-901317 potently suppressed HIV-1 replication in both cell types and inhibited HIV-1 replication in ex vivo cultured lymphoid tissue and in RAG-hu mice infected in vivo. This anti-HIV activity was dependent on ABCA1, because the effect of the drug was significantly reduced in ABCA1-defective T cells from a patient with Tangier disease, and RNA interference-mediated inhibition of ABCA1 expression eliminated the effect of TO-901317 on HIV-1 replication. TO-901317-mediated inhibition of HIV replication was due to reduced virus production and reduced infectivity of produced virions. The infectivity defect was in part due to reduced fusion activity of the virions, which was directly linked to reduced viral cholesterol. These results describe a novel approach to inhibiting HIV infection by stimulating ABCA1 expression.
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43
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Xu L, Korade Z, Porter NA. Oxysterols from free radical chain oxidation of 7-dehydrocholesterol: product and mechanistic studies. J Am Chem Soc 2010; 132:2222-32. [PMID: 20121089 DOI: 10.1021/ja9080265] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Free radical chain oxidation of highly oxidizable 7-dehydrocholesterol (7-DHC), initiated by 2,2'-azobis(4-methoxy-2,4-dimethylvaleronitrile), was carried out at 37 degrees C in benzene for 24 h. Fifteen oxysterols derived from 7-DHC were isolated and characterized with 1D and 2D NMR spectroscopy and mass spectrometry. A mechanism that involves abstraction of hydrogen atoms at C-9 and/or C-14 is proposed to account for the formation of all of the oxysterols and the reaction progress profile. In either the H-9 or H-14 mechanism, a pentadienyl radical intermediate is formed after abstraction of H-9 or H-14 by a peroxyl radical. This step is followed by the well-precedented transformations observed in peroxidation reactions of polyunsaturated fatty acids such as oxygen addition, peroxyl radical 5-exo cyclization, and S(H)i carbon radical attack on the peroxide bond. The mechanism for peroxidation of 7-DHC also accounts for the formation of numerous oxysterol natural products isolated from fungal species, marine sponges, and cactaceous species. In a cell viability test, the oxysterol mixture from 7-DHC peroxidation was found to be cytotoxic to Neuro2a neuroblastoma cells in the micromolar concentration range. We propose that the high reactivity of 7-DHC and the oxysterols generated from its peroxidation may play important roles in the pathogenesis of Smith-Lemli-Opitz syndrome, X-linked dominant chondrodysplasia punctata, and cerebrotendinous xanthomatosis, all of these being metabolic disorders characterized by an elevated level of 7-DHC.
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Affiliation(s)
- Libin Xu
- Department of Chemistry and Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235, USA
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44
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Gas chromatography–mass spectrometry determination of conjugated linoleic acids and cholesterol oxides and their stability in a model system. Anal Biochem 2010; 400:130-8. [DOI: 10.1016/j.ab.2010.01.031] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 01/18/2010] [Accepted: 01/25/2010] [Indexed: 12/13/2022]
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45
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Shui G, Guan XL, Low CP, Chua GH, Goh JSY, Yang H, Wenk MR. Toward one step analysis of cellular lipidomes using liquid chromatography coupled with mass spectrometry: application to Saccharomyces cerevisiae and Schizosaccharomyces pombe lipidomics. MOLECULAR BIOSYSTEMS 2010; 6:1008-17. [PMID: 20485745 DOI: 10.1039/b913353d] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Recent rapid growth of lipidomics is mainly attributed to technological advances in mass spectrometry. Development of soft ionization techniques, in combination with computational tools, has spurred subsequent development of various methods for lipid analysis. However, none of these existing approaches can cover major cellular lipids in a single run. Here we demonstrate that a single method of liquid chromatography coupled with mass spectrometry (LCMS) can be used for simultaneous profiling of major cellular lipids including glycerophospholipids (PLs), sphingolipids (SPLs), waxes, sterols (ST) and mono-, di- as well as triacylglycerides (MAG, DAG, TAG). We applied this approach to analyze these lipids in various organisms including Saccharomyces cerevisiae and Schizosaccharomyces pombe. While phospholipids and triacylglycerides of S. pombe mainly contain 18 : 1 fatty acyls, those of S. cerevisiae contain 16 : 1, 16 : 0 and 18 : 1 fatty acyls. S. cerevisiae and S. pombe contain distinct sphingolipid profiles. S. cerevisiae has abundant inositol phytoceramides (IPC), while S. pombe contains high levels of free phytoceramides as well as short chain phytoceramides (t18:1/20 : 0-B) and IPC (t18:1/20 : 0-B). In S. cerevisiae, our results demonstrated accumulation of ergosterol esters in tgl1Delta cells and accumulation of various TAG species in tgl3Delta cells, which are consistent with the function of the respective enzymes. Furthermore, we, for the first time, systematically characterized lipids in S. pombe and measured their dynamic changes in Deltaplh1Deltadga1 cells at different growth phases. We further discussed dynamic changes of phospholipids, sphingolipids and neutral lipids in the progress of programmed cell death in Deltaplh1Deltadga1 cells of S. pombe.
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Affiliation(s)
- Guanghou Shui
- Yong Loo Lin School of Medicine, National University of Singapore, Department of Biochemistry, 8 Medical Drive, Block MD 7, Singapore.
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46
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Lupin protein isolate and cysteine-supplemented casein reduce calcification of atherosclerotic lesions in apoE-deficient mice. Br J Nutr 2009; 103:180-8. [PMID: 19709448 DOI: 10.1017/s0007114509991565] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Protein from lupin is supposed to have anti-atherogenic effects due to its lipid-lowering properties in laboratory animals. It is further suggested that the amino acid cysteine plays a crucial role in this aspect. The objective of the present study was to compare the effects of lupin protein and cysteine-supplemented casein with those of casein on atherosclerotic lesion development in apoE-deficient mice. For that purpose, thirty mice were fed an egg albumin-based Western-type diet containing test protein (100 g/kg) for 4 months. ApoE-deficient mice fed the lupin protein or the cysteine-supplemented casein had more than 50 % less aortic calcification than mice fed casein (P < 0.05). The quantified lesion area as a percentage of the total surface area, as well as the collagen and fat content of the lesions were not different between the three groups of mice. The concentration of VLDL TAG was higher in mice fed the lupin protein and the cysteine-supplemented casein than in mice fed casein (P < 0.05). The cholesterol concentrations of VLDL, LDL and HDL from mice fed the lupin protein and cysteine-supplemented casein were not different compared with the mice fed casein. Also, the plasma concentrations of homocysteine, Ca, inorganic phosphate, and the activity of glutathione peroxidase in plasma and liver did not differ between the three groups of mice. The present study shows that lupin protein and cysteine-supplemented casein compared with casein reduce the calcification of atherosclerotic lesions in apoE-deficient mice. This effect seems not to be mediated by effects on plasma lipoproteins, homocysteine and circulating minerals.
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47
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Griffiths WJ, Wang Y. Analysis of neurosterols by GC-MS and LC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:2778-805. [PMID: 19560986 DOI: 10.1016/j.jchromb.2009.05.017] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Revised: 05/07/2009] [Accepted: 05/09/2009] [Indexed: 10/20/2022]
Abstract
The term neurosteroid was coined by Baulieu and colleagues in Paris towards the end of the last century to describe steroids which are synthesised in the central or peripheral nervous system [E.E. Baulieu, Psychoneuroendocrinology 23 (1998) 963-87]. This definition was restricted to side-chain "shortened" steroids with 21 carbon atoms or less, and excluded sterols and their carboxylic acids with an intact side-chain. By analogy, we now use the term neurosterol to describe C(27) sterols synthesised in the nervous system. In this review we discuss the biological importance of neurosterols, and how they are extracted, isolated, and analysed by GC-MS and LC-MS/MS, from brain and relevant body fluids. We present applications of methodology employed for analysis of specific sterols and comment on the relative merits of the methods employed. Finally, the importance of future in-depth "sterolomic" investigations of brain is highlighted.
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Affiliation(s)
- William J Griffiths
- Institute of Mass Spectrometry, School of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, UK.
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48
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Hu C, van der Heijden R, Wang M, van der Greef J, Hankemeier T, Xu G. Analytical strategies in lipidomics and applications in disease biomarker discovery. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:2836-46. [PMID: 19233743 DOI: 10.1016/j.jchromb.2009.01.038] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2008] [Revised: 01/24/2009] [Accepted: 01/27/2009] [Indexed: 11/25/2022]
Abstract
Lipidomics is a lipid-targeted metabolomics approach aiming at comprehensive analysis of lipids in biological systems. Recently, lipid profiling, or so-called lipidomics research, has captured increased attention due to the well-recognized roles of lipids in numerous human diseases to which lipid-associated disorders contribute, such as diabetes, obesity, atherosclerosis and Alzheimer's disease. Investigating lipid biochemistry using a lipidomics approach will not only provide insights into the specific roles of lipid molecular species in health and disease, but will also assist in identifying potential biomarkers for establishing preventive or therapeutic approaches for human health. Recent technological advancements in mass spectrometry and rapid improvements in chromatographic techniques have led to the rapid expansion of the lipidomics research field. In this review, emphasis is given to the recent advances in lipidomics technologies and their applications in disease biomarker discovery.
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Affiliation(s)
- Chunxiu Hu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, the Chinese Academy of Sciences, 457 Zhongshan Road, 116023 Dalian, China
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49
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Liquid chromatography-tandem mass spectrometry determination of plasma 24S-hydroxycholesterol with chromatographic separation of 25-hydroxycholesterol. Anal Biochem 2008; 381:151-3. [PMID: 18555788 DOI: 10.1016/j.ab.2008.05.037] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Revised: 05/20/2008] [Accepted: 05/23/2008] [Indexed: 10/22/2022]
Abstract
Concentrations of circulating 24S-hydroxycholesterol (24SOHChol) are of interest as a practical measure of cholesterol efflux from the human brain. The current method of choice for 24SOHChol quantification is with gas chromatography-mass spectrometry (GC-MS). Liquid chromatography-mass spectrometry (LC-MS) methods to detect 24SOHChol have been described, but they lack rigorous high-performance liquid chromatography (HPLC) separation of a closely eluting isomeric oxysterol, 25-hydroxycholesterol. This is important because 25-hydroxycholesterol can be present in significant amounts and tandem mass spectrometry (MS/MS) cannot completely differentiate 24SOHChol. We describe an LC-MS method with rapid chromatographic separation of the oxysterols to permit accurate determination of plasma 24SOHChol. The availability of an LC-MS method offers advantages such as simplified sample work-up and analysis.
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50
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Lee H, Chien J, Chen B. Inhibition of cholesterol oxidation in marinated foods as affected by antioxidants during heating. Food Chem 2008. [DOI: 10.1016/j.foodchem.2007.10.072] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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