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Harazim E, Vrkoslav V, Buděšínský M, Harazim P, Svoboda M, Plavka R, Bosáková Z, Cvačka J. Nonhydroxylated 1- O-acylceramides in vernix caseosa. J Lipid Res 2018; 59:2164-2173. [PMID: 30254076 PMCID: PMC6210899 DOI: 10.1194/jlr.m088864] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/21/2018] [Indexed: 01/22/2023] Open
Abstract
Vernix caseosa, the waxy substance that coats the skin of newborn babies, has an extremely complex lipid composition. We have explored these lipids and identified nonhydroxylated 1-O-acylceramides (1-O-ENSs) as a new class of lipids in vernix caseosa. These ceramides mostly contain saturated C11-C38 ester-linked (1-O) acyls, saturated C12-C39 amide-linked acyls, and C16-C24 sphingoid bases. Because their fatty acyl chains are frequently branched, numerous molecular species were separable and detectable by HPLC/MS: we found more than 2,300 molecular species, 972 of which were structurally characterized. The most abundant 1-O-ENSs contained straight-chain and branched fatty acyls with 20, 22, 24, or 26 carbons in the 1-O position, 24 or 26 carbons in the N position, and sphingosine. The 1-O-ENSs were isolated using multistep TLC and HPLC and they accounted for 1% of the total lipid extract. The molecular species of 1-O-ENSs were separated on a C18 HPLC column using an acetonitrile/propan-2-ol gradient and detected by APCI-MS, and the structures were elucidated by high-resolution and tandem MS. Medium-polarity 1-O-ENSs likely contribute to the cohesiveness and to the waterproofing and moisturizing properties of vernix caseosa.
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Affiliation(s)
- Eva Harazim
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University, CZ-128 43 Praha 2, Czech Republic
| | - Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
| | - Miloš Buděšínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
| | - Petr Harazim
- Department of Concrete and Masonry Structures, Faculty of Civil Engineering, Czech Technical University in Prague, CZ-166 29 Praha 6, Czech Republic
| | - Martin Svoboda
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
| | - Richard Plavka
- Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital in Prague, CZ-128 00 Praha 2, Czech Republic
| | - Zuzana Bosáková
- Department of Analytical Chemistry, Faculty of Science, Charles University, CZ-128 43 Praha 2, Czech Republic
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, CZ-166 10 Praha 6, Czech Republic
- Department of Analytical Chemistry, Faculty of Science, Charles University, CZ-128 43 Praha 2, Czech Republic
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2
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Tessema EN, Gebre-Mariam T, Frolov A, Wohlrab J, Neubert RHH. Development and validation of LC/APCI-MS method for the quantification of oat ceramides in skin permeation studies. Anal Bioanal Chem 2018; 410:4775-4785. [PMID: 29947900 DOI: 10.1007/s00216-018-1162-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 04/20/2018] [Accepted: 05/24/2018] [Indexed: 12/11/2022]
Abstract
Ceramides (CERs) are the backbone of the intercellular lipid lamellae of the stratum corneum (SC), the outer layer of the skin. Skin diseases such as atopic dermatitis, psoriasis, and aged skin are characterized by dysfunctional skin barrier and dryness which are associated with reduced levels of CERs. Replenishing the depleted epidermal CERs with exogenous CERs has been shown to have beneficial effects in improving the skin barrier and hydration. The exogenous CERs such as phyto-derived CERs (PhytoCERs) can be delivered deep into the SC using novel topical formulations. This, however, requires investigating the rate and extent of skin permeation of CERs. In this study, an LC/APCI-MS method to detect and quantify PhytoCERs in different layers of the skin has been developed and validated. The method was used to investigate the skin permeation of PhytoCERs using Franz diffusion cells after applying an amphiphilic cream containing PhytoCERs to the surface of ex vivo human skin. As plant-specific CERs are not commercially available, well-characterized CERs isolated from oat (Avena abyssinica) were used as reference standards for the development and validation of the method. The method was linear over the range of 30-1050 ng/mL and sensitive with limit of detection and quantification of 10 and 30 ng/mL, respectively. The method was also selective, accurate, and precise with minimal matrix effect (with mean matrix factor around 100%). Even if more than 85% of oat CERs in the cream remained in the cream after the incubation periods of 30, 100, and 300 min, it was possible to quantify the small quantities of oat CERs distributed across the SC, epidermis, and dermis of the skin indicating the method's sensitivity. Therefore, the method can be used to investigate the skin permeation of oat CERs from the various pharmaceutical and cosmeceutical products without any interference from the skin constituents such as the epidermal lipids. Graphical abstract ᅟ.
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Affiliation(s)
- Efrem N Tessema
- Department of Pharmaceutical Technology and Biopharmaceutics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Tsige Gebre-Mariam
- Department of Pharmaceutics and Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Andrej Frolov
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle (Saale), Germany
| | - Johannes Wohlrab
- Department of Dermatology and Venereology, Medical Faculty, Martin Luther University Halle-Wittenberg, Ernst-Grube-Str. 40, 06120, Halle (Saale), Germany
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Weinbergweg 23, 06120, Halle (Saale), Germany
| | - Reinhard H H Neubert
- Department of Pharmaceutical Technology and Biopharmaceutics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany.
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Weinbergweg 23, 06120, Halle (Saale), Germany.
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3
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Profile and quantification of human stratum corneum ceramides by normal-phase liquid chromatography coupled with dynamic multiple reaction monitoring of mass spectrometry: development of targeted lipidomic method and application to human stratum corneum of different age groups. Anal Bioanal Chem 2016; 408:6623-36. [DOI: 10.1007/s00216-016-9775-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/30/2016] [Accepted: 07/06/2016] [Indexed: 10/21/2022]
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4
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Mi S, Zhao YY, Dielschneider RF, Gibson SB, Curtis JM. An LC/MS/MS method for the simultaneous determination of individual sphingolipid species in B cells. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1031:50-60. [PMID: 27450899 DOI: 10.1016/j.jchromb.2016.07.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 07/13/2016] [Accepted: 07/15/2016] [Indexed: 12/27/2022]
Abstract
Comprehensive profiling of sphingolipids is of great importance for clinical and pharmaceutical studies. An LC/MS/MS method was established for the simultaneous separation and quantification of individual sphingolipid species including ceramides, dihydroceramides, glucosylceramides, sphingosine, sphingosine-1-phosphate, sphinganine and sphinganine-1-phosphate. All target individual sphingolipid species were separated and quantified in a single chromatographic run of <20min. Method validation results indicated that calibration curves were linear in the range of 2.5-10,000nM for ceramides and glucosylceramides, 10-10,000nM for dihydroceramides, 5-10,000nM for sphingosine, sphingosine-1-phosphate, sphinganine and sphinganine-1-phosphate, respectively. The limits of detection ranged from 0.5nM to 5nM. Accuracies of 92.5-113% with precisions of 0.3-8.0% RSD were obtained for all of the standards over a wide range of concentrations. The application of this method was demonstrated using B cells collected from Chronic Lymphocytic Leukemia patients (n=5) and healthy donors (n=4). 17 sphingolipid species were successfully characterized and quantified in the lipid extract. This is a rapid method that could be readily adapted to lipidomic investigations of sphingolipids in other bio-fluids and tissues.
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Affiliation(s)
- Si Mi
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada
| | - Yuan-Yuan Zhao
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada
| | - Rebecca F Dielschneider
- Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada; Research Institute of Oncology and Hematology, Cancer Care Manitoba, Winnipeg, Manitoba, Canada
| | - Spencer B Gibson
- Department of Immunology, University of Manitoba, Winnipeg, Manitoba, Canada; Research Institute of Oncology and Hematology, Cancer Care Manitoba, Winnipeg, Manitoba, Canada
| | - Jonathan M Curtis
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada.
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Angelbeck-Schulze M, Stahl J, Brodesser S, Rohn K, Naim H, Hewicker-Trautwein M, Kietzmann M, Bäumer W, Mischke R. Comparison of three different sampling methods for canine skin lipids. Vet Dermatol 2013; 24:233-e51. [PMID: 23470179 DOI: 10.1111/vde.12015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2012] [Indexed: 11/26/2022]
Abstract
BACKGROUND Epidermal lipids are of major interest in dermatological research, especially in canine atopic dermatitis. Owing to the existence of several sampling methods, the interpretation of study results is often complicated. OBJECTIVES This study aimed to compare three different sampling methods and to establish a minimally invasive method for collecting canine epidermal lipids. ANIMALS AND METHODS Skin samples from five dogs with no obvious skin abnormalities were taken from the caudal back and the inguinal region postmortem. Samples consisted of heat-separated epidermis of three skin biopsies, three scrapes and three skin scrubs. Lipids were analysed by high-performance thin-layer chromatography; the resulting bands were identified by using corresponding standards, retardation factors and mass spectrometry. The influences of the sampling method, the body site and the ceramide standards were investigated. RESULTS Between body sites, significant differences were found for cholesterol sulphate, cholesteryl esters and triglycerides. Significant differences between sampling methods were detected for all lipid fractions except for cholesterol sulphate and glucosylceramides within the lipid profile, and for at least four ceramide classes within the ceramide profile. The most obvious discrepancies were found between heat-separated epidermis and skin scrub. The reproducibility was high for scraping and skin scrub, but was lowest for heat-separated epidermis. Furthermore, this study revealed a marked influence of ceramide standards on the results regarding the ceramide profile. CONCLUSIONS AND CLINICAL IMPORTANCE Scraping and skin scrub are comparably suitable methods for skin lipid sampling, whereas the analysis of heat-separated epidermis may not be the method of first choice.
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Affiliation(s)
- Mandy Angelbeck-Schulze
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Buenteweg 9, Hanover, Germany
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6
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Development and validation of LC/ESI-MS method for the detection and quantification of exogenous ceramide NP in stratum corneum and other layers of the skin. J Pharm Biomed Anal 2012; 60:7-13. [DOI: 10.1016/j.jpba.2011.10.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 10/27/2011] [Accepted: 10/28/2011] [Indexed: 11/21/2022]
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7
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Goto H, Nishikawa K, Shionoya N, Taniguchi M, Igarashi T. Determination of sphingoid bases from hydrolyzed glucosylceramide in rice and wheat by online post-column high-performance liquid chromatography with O-phthalaldehyde derivatization. J Oleo Sci 2012. [DOI: 10.5650/jos.61.681] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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8
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Merle C, Laugel C, Chaminade P, Baillet-Guffroy A. QUANTITATIVE STUDY OF THE STRATUM CORNEUM LIPID CLASSES BY NORMAL PHASE LIQUID CHROMATOGRAPHY: COMPARISON BETWEEN TWO UNIVERSAL DETECTORS. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826071003608520] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- C. Merle
- a Groupe Chimie Analytique de Paris-Sud EA, School of Pharmacy , Châtenay-Malabry Cedex, France
| | - C. Laugel
- a Groupe Chimie Analytique de Paris-Sud EA, School of Pharmacy , Châtenay-Malabry Cedex, France
| | - P. Chaminade
- a Groupe Chimie Analytique de Paris-Sud EA, School of Pharmacy , Châtenay-Malabry Cedex, France
| | - A. Baillet-Guffroy
- a Groupe Chimie Analytique de Paris-Sud EA, School of Pharmacy , Châtenay-Malabry Cedex, France
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9
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Budvytiene M, Babenko N, Liesiene J. LC Separation of Fatty Acid Ceramides Using a Two Column System. Chromatographia 2009. [DOI: 10.1365/s10337-009-1093-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Masukawa Y, Narita H, Sato H, Naoe A, Kondo N, Sugai Y, Oba T, Homma R, Ishikawa J, Takagi Y, Kitahara T. Comprehensive quantification of ceramide species in human stratum corneum. J Lipid Res 2009; 50:1708-19. [PMID: 19349641 DOI: 10.1194/jlr.d800055-jlr200] [Citation(s) in RCA: 150] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
One of the key challenges in lipidomics is to quantify lipidomes of interest, as it is practically impossible to collect all authentic materials covering the targeted lipidomes. For diverse ceramides (CER) in human stratum corneum (SC) that play important physicochemical roles in the skin, we developed a novel method for quantification of the overall CER species by improving our previously reported profiling technique using normal-phase liquid chromatography-electrospray ionization-mass spectrometry (NPLC-ESI-MS). The use of simultaneous selected ion monitoring measurement of as many as 182 kinds of molecular-related ions enables the highly sensitive detection of the overall CER species, as they can be analyzed in only one SC-stripped tape as small as 5 mm x 10 mm. To comprehensively quantify CERs, including those not available as authentic species, we designed a procedure to estimate their levels using relative responses of representative authentic species covering the species targeted, considering the systematic error based on intra-/inter-day analyses. The CER levels obtained by this method were comparable to those determined by conventional thin-layer chromatography (TLC), which guarantees the validity of this method. This method opens lipidomics approaches for CERs in the SC.
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Affiliation(s)
- Yoshinori Masukawa
- Tochigi Research Laboratories, Kao Corporation, Ichikai, Haga, Tochigi 321-3497, Japan.
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11
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Farwanah H, Pierstorff B, Schmelzer CEH, Raith K, Neubert RHH, Kolter T, Sandhoff K. Separation and mass spectrometric characterization of covalently bound skin ceramides using LC/APCI-MS and Nano-ESI-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 852:562-70. [PMID: 17368999 DOI: 10.1016/j.jchromb.2007.02.030] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2006] [Revised: 02/06/2007] [Accepted: 02/12/2007] [Indexed: 11/28/2022]
Abstract
Ceramides covalently bound to keratinocytes are essential for the barrier function of the skin, which can be disturbed in diseases, such as psoriasis and atopic dermatitis. These ceramides of the classes omega-hydroxyacyl-sphingosine and omega-hydroxyacyl-6-hydroxysphingosine contain an omega-hydroxy fatty acid. For their separation and identification, a new analytical approach based on normal phase liquid chromatography coupled to atmospheric pressure chemical ionization mass spectrometry and tandem nano-electrospray mass spectrometry, respectively, is presented here. Tandem mass spectrometry provided structural information about the sphingoid base as well as the fatty acid moieties. The chain lengths of the bases ranged from C12 to C22, the chain lengths of the fatty acids varied between C28 and C36. In total, 67 ceramide species have been identified in human skin. The analytical methods presented in this work can be helpful for investigating alterations in the ceramide composition of the skin as seen in psoriasis, atopic dermatitis, and diseases with impaired epidermal barrier function.
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Affiliation(s)
- Hany Farwanah
- LIMES-Life and Medical Sciences Bonn, Program Unit Membrane and Lipid Biochemistry, Laboratory of Biology & Lipid Biochemistry, Friedrichs-Wilhelm-University, Gerhard-Domagk-Strasse 1, D-53121 Bonn, Germany
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12
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Wang L, Wang T, Fehr WR. HPLC quantification of sphingolipids in soybeans with modified palmitate content. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:7422-8. [PMID: 17002403 DOI: 10.1021/jf061624c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Efficient separation and accurate quantification of sphingolipids (SL) are important for studying SL concentrations and biological functions. The objectives of this study were to develop effective methods for the separation and quantification of SL and to determine the relationship between palmitate and SL contents of mature soybean seeds. Methods using column chromatography and high-performance liquid chromatography-evaporative light scattering detector (HPLC-ELSD) were developed to separate and quantify glucosylceramide (GlcCer) and ceramide (Cer) in 15 soybeans lines in which palmitate content ranged from 3.7 to 40.7%. There were significant differences among the lines for GlcCer (83.4-397.6 nmol/g) and major Cer contents (8.4-20.7 nmol/g) on a dry weight basis. The correlations of palmitate content with GlcCer and Cer concentrations were not significant. The results indicated that the palmitate content of soybean seed did not affect their GlcCer and Cer contents. Genetic factors other than those that control palmitate content seemed to be responsible for the variation among soybean lines for GlcCer and Cer contents.
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Affiliation(s)
- Liping Wang
- Department of Food Science and Human Nutrition, Iowa State University, Ames, Iowa 50011, USA
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13
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Masukawa Y, Tsujimura H, Narita H. Liquid chromatography-mass spectrometry for comprehensive profiling of ceramide molecules in human hair. J Lipid Res 2006; 47:1559-71. [PMID: 16639079 DOI: 10.1194/jlr.d600007-jlr200] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Ceramides (CERs) play key roles in signal transduction and cell regulation, probably during the keratinization of human hair. Current methods using mass spectrometry (MS), however, are not sufficient to allow the comprehensive analysis of CER molecules, including isobaric and isomeric CERs. Therefore, a method for the comprehensive profiling of CERs was developed. The method developed is based on reversed-phase liquid chromatography (RPLC) coupled to atmospheric pressure chemical ionization (APCI)-MS. Comprehensive identification and profiling of CERs is achieved using two sets of multimass chromatograms obtained from two channel detections that monitor both molecular-related and sphingoid-related ions under two different in-source collision-induced dissociation conditions and using retention times obtained from RPLC. The application of this method revealed that human hair contains 73 species of CER molecules, which were all corroborated by structural analysis using tandem mass spectrometry. The results further revealed that the composition is characterized by predominant molecules consisting of even carbon atom-containing saturated/unsaturated nonhydroxy or alpha-hydroxy fatty acids and C(18) dihydrosphingosine, a minor but distinct content of isobaric/isomeric and odd chain-containing CERs. This successfully developed RPLC-APCI-MS technique allows the comprehensive profiling of CER molecules in hair for the investigation of their physicochemical and physiological roles.
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Affiliation(s)
- Yoshinori Masukawa
- Tochigi Research Laboratories, Kao Corporation, Haga, Tochigi 321-0962, Japan.
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14
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Quinton L, Gaudin K, Baillet A, Chaminade P. Microanalytical systems for separations of stratum corneum ceramides. J Sep Sci 2006; 29:390-8. [PMID: 16544881 DOI: 10.1002/jssc.200500362] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The small amount of lipids from human skin obtained with noninvasive sampling method led us to investigate microanalytical separation techniques. The lipid class analysis was performed with a micro polyvinyl alcohol-silica (PVA-Sil) column. The gradient elution was from heptane to acetone/butanol 90:10 v/v in 4%/min at 78 microL/min. In addition an evaporative light scattering detector (ELSD) was modified for micro-LC. All solvents contained 0.1% of triethylamine and formic acid in stoichiometric amount, which increased the ELSD response. In these conditions, the cholesterol eluted before free fatty acid, and squalene and triglycerides close to the dead volume. The various ceramide classes eluted following the order of the increased number of hydroxyl groups. The LOD for ceramides was 2.2 ng. The advantages of this method are the use of a normal stationary phase more reliable due to its chemical stability, its surface homogeneity and its development in microchromatography without chlorinated solvents which offers small LOD and the whole profile of lipids present in stratum corneum (SC). A method using a narrow-bore PVA-Sil column was used to collect ceramide fraction. Then the molecular species were analysed with a porous graphitic carbon column in capillary LC using a gradient from CH3OH/CHCl3 70:30 v/v to CHCl3 at 2%/min with a flow rate at 5 microL/min. The LOD obtained for ceramide was 1 ng. Both methods were assessed with SC samples obtained by rinsing a 5.7 cm2 area of the forearm with 25 mL of ethanol.
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Affiliation(s)
- Loïc Quinton
- Laboratoire de Chimie Analytique, Faculté de pharmacie, Groupe de Chimie Analytique de Paris-Sud, Châtenay-Malabry, France
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15
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Miyanishi K, Shiono N, Shirai H, Dombo M, Kimata H. Reduction of transepidermal water loss by oral intake of glucosylceramides in patients with atopic eczema. Allergy 2005; 60:1454-5. [PMID: 16197483 DOI: 10.1111/j.1398-9995.2005.00915.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- K Miyanishi
- R&D Center, Unitika Ltd. 23, Kozakura-Uji Uji City Kyoto Prefecture 611-0021, Japan.
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16
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Farwanah H, Wohlrab J, Neubert RHH, Raith K. Profiling of human stratum corneum ceramides by means of normal phase LC/APCI–MS. Anal Bioanal Chem 2005; 383:632-7. [PMID: 16184366 DOI: 10.1007/s00216-005-0044-3] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2005] [Revised: 06/10/2005] [Accepted: 07/17/2005] [Indexed: 11/26/2022]
Abstract
The ceramides of the stratum corneum are critical to maintaining the epidermal barrier function of the skin. A number of skin diseases and disorders are known to be related to impairments of the ceramide pattern. Therefore, obtaining mass spectrometric profiles of the nine ceramide classes known to exist aids our understanding of the underlying molecular mechanisms, which should eventually lead to new diagnostic opportunities: for example, the mass spectrometric profiles of patients suffering from serious skin diseases such as atopic dermatitis and psoriasis can be compared to those of healthy controls. Previous work on mass spectrometric analysis of ceramides relied mostly on GC/MS after hydrolysis and derivatization. The introduction of ESI-MS and LC/ESI-MS has provided new options for directly analyzing intact ceramides. However, some of the ceramide classes are not accessible to ESI-MS. However, as shown in this work, these limitations of GC/MS and ESI-MS can be overcome using a new approach based on normal phase LC interfaced with APCI-MS. Separation and online detection of the stratum corneum ceramide classes became possible in one run. Ceramide species with C26 and/or C28 fatty acid chains were the most abundant ones in Cer [NP], Cer [NH], Cer [AP], and Cer [AH]. The main component of Cer [AS] was C16. The omega-esterified ceramide classes Cer [EOS], Cer [EOP] and Cer [EOH] contained mostly species with fatty acids >C30. This was also the case for Cer [NS], suggesting an analogy to the omega-esterified ceramides. In addition, evidence for a new ceramide class Cer [NdS] was found.
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Affiliation(s)
- Hany Farwanah
- Institute of Pharmaceutics and Biopharmaceutics, Martin Luther University, W.-Langenbeck-Str. 4, 06120 Halle (S.), Germany
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17
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Farwanah H, Raith K, Neubert RHH, Wohlrab J. Ceramide profiles of the uninvolved skin in atopic dermatitis and psoriasis are comparable to those of healthy skin. Arch Dermatol Res 2005; 296:514-21. [PMID: 15803327 DOI: 10.1007/s00403-005-0551-2] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2004] [Revised: 02/03/2005] [Accepted: 02/14/2005] [Indexed: 10/25/2022]
Abstract
Ceramides are sphingolipids consisting of sphingoidbases, which are amide-linked to fatty acids. In the stratum corneum, they represent the major constituent of the free extractable intercellular lipids and play a significant role in maintaining and structuring the water permeability barrier of the skin. Using thin layer chromatography, which represents the method of the first choice in analyzing the stratum corneum ceramides, at least seven classes can be distinguished. Each ceramide class contains various species, which have the same head group and different chain lengths. As in many other skin disorders, atopic dermatitis and psoriasis show derangements in content and profile of the ceramides. Such derangements were reported for both the lesional involved as well as for the normal-appearing uninvolved skin. In this study, we focused on investigating the stratum corneum ceramides of the uninvolved skin in atopic dermatitis and psoriasis patients compared to healthy skin. The aim of the investigations was to explore possible significant and specific differences which can be accomplished for purposes of early diagnostics. The skin lipids were collected by means of an in vivo topical extraction procedure using an extraction mixture consisting of n-hexane and ethanol, (2:1). An automated multiple development-high performance thin layer chromatography (AMD-HPTLC) method with photodensitometric detection were applied to separate the ceramides and to estimate their contents. For studying their molecular profile within each ceramide class, a new method of normal phase HPLC with atmospheric pressure chemical ionization mass spectrometry were used. The results obtained by AMD-HPTLC exposed no significant alterations regarding the relative composition of the major stratum corneum lipids and primarily the ceramides. In addition, the mass spectrometric profiles within each ceramide class were similar in the patients and the healthy control subjects. In conclusion, this study revealed that the normal-appearing uninvolved skin of atopic dermatitis and psoriasis patients does not prove significant or specific deficiencies with respect to the free extractable major stratum corneum lipids and mainly the ceramides, when compared to healthy skin. Thus, they cannot be used for diagnostic purposes. Furthermore, our data are not consistent with the concept that impairments in the ceramide composition represent an obligate etiologic factor for both diseases.
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Affiliation(s)
- Hany Farwanah
- Institute of Pharmaceutics and Biopharmaceutics, Martin Luther University, W.-Langenbeck-Str. 4, 06120, Halle (S.), Germany
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Ramjit HG, Newton R, Guare JP. A novel coaxial electrospray ionization method for characterizing hexacosanoylceramides by Fourier transform ion cyclotron resonance mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2005; 19:1257-1262. [PMID: 15838927 DOI: 10.1002/rcm.1926] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Because of poor aqueous solubility and lack of UV chromophores, the characterization of long-chain hydrocarbons and ceramides by conventional UV and mass spectrometric methods has not been successful. Therefore, a novel coaxial electrospray ionization method was developed for characterizing reaction products of phytosphingosine and hexacosanoic acid in toluene and tetrahydrofuran (THF), by high resolving power Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS). Simultaneous spraying of a solution of apolar analytes and polar reagents into the gas phase readily enabled protonation and/or sodiation of analyte with enhanced signal-to-noise (S/N). Sample introduction was by direct infusion such that the sprayers were arranged either along the instrument line-of-sight (for monospray and coaxial spray modes) or in a 45 degrees configuration for dual-spray mode. For dual-spray and coaxial spraying, p-toluenesulphonic acid was used as a reagent and sprayed simultaneously with the analyte dissolved in toluene or THF. Compounds were characterized by accurate mass measurement of the protonated and/or sodiated molecules.
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Affiliation(s)
- Harri G Ramjit
- Department of Medicinal Chemistry, Merck Research Laboratories, Merck & Co., Inc., West Point, PA 19486, USA.
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Raith K, Farwanah H, Wartewig S, Neubert RHH. Progress in the analysis of Stratum corneum ceramides. EUR J LIPID SCI TECH 2004. [DOI: 10.1002/ejlt.200400982] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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