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Ding N, Levis RJ. Noncontact Detection of Absorbed Dinitrotoluene Using Laser Electrospray Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2025. [PMID: 40371943 DOI: 10.1021/jasms.5c00046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2025]
Abstract
Noncontact detection of the explosive signature molecule 2,4-dinitrotoluene (DNT) from both metal and sand substrates using laser electrospray mass spectrometry (LEMS) is investigated. The measurement of DNT mass spectral signal intensity as a function of laser vaporization energy reveals that the optimal laser pulse energy for metal (0.4 mJ) is lower than that for dielectric substrates (1.2 mJ). The effects of laser spot area and laser power density on the LEMS analysis of DNT were studied at fixed laser pulse energies. The LEMS signal intensity of DNT is modeled as the product of laser spot area and laser power density. The model shows that both parameters contribute to the measured signal intensity, in agreement with experimental data. Furthermore, investigations of the DNT signal intensity as a function of nine different sampling tube positions were conducted to improve the capture efficiency of laser-vaporized analytes. The limit of detection (LoD) for DNT using LEMS is 15 ng through noncontact detection using a Venturi pump remote sampling system.
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Affiliation(s)
- Ning Ding
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
- Center for Advanced Photonics Research, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Robert J Levis
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
- Center for Advanced Photonics Research, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
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2
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Feto NA, Asuzu P, Wan J, Stentz F, Dagogo-Jack S, Mandal N. Do circulating sphingolipid species correlate with age? A study in a normoglycemic biracial population. Biogerontology 2025; 26:106. [PMID: 40323517 PMCID: PMC12052799 DOI: 10.1007/s10522-025-10244-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2025] [Accepted: 04/16/2025] [Indexed: 05/07/2025]
Abstract
Sphingolipids (SPLs) are essential membrane lipids with significant bioactive roles involved in various cellular processes, and their alterations have been found to be linked to many diseases, including age-related diseases. However, comprehensive studies on the association of plasma sphingolipids with aging in large, diverse cohorts remain limited. The objective of this study was to investigate the relationship between plasma sphingolipid levels and aging in a cohort of 240 normoglycemic, biracial individuals (Black and White), aged 19-65 years. Using a targeted lipidomics approach, we measured 76 sphingolipid species using liquid chromatography-tandem mass spectrometry (LC-MS/MS) in picomole/mL and determined changes in their levels with age and their correlations with aging. We found significant age-related changes in several sphingolipid species, including ceramide C18:1 and several very long-chain sphingomyelins (VLC SMs), such as C28:1 and C30:1, increases with age, showing a positive correlation. On the other hand, glycosphingolipids (monohexosylceramide, MHC; lactosylceramide, LacCer) and sphingosine (So) showed strong negative correlations with aging. A significant correlation was also observed between the ratios of saturate/monosaturated sphingolipid species with aging. In conclusion, our findings provide novel insights into the dynamic changes of circulating sphingolipids with aging. Specific sphingolipid species, such as Ceramide C18:1 and SM, accumulate with age, while others, including MHC, LacCer, and So decrease. These results suggest that the plasma SPL profile may provide valuable information about healthy aging and age-associated disease conditions.
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Affiliation(s)
- Naser Aliye Feto
- Departments of Ophthalmology, Anatomy and Neurobiology, University of Tennessee Health Science Center, 930 Madison Ave., Memphis, TN, 38163, USA
| | - Peace Asuzu
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Jim Wan
- Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Frankie Stentz
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Sam Dagogo-Jack
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
- General Clinical Research Center, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Nawajes Mandal
- Departments of Ophthalmology, Anatomy and Neurobiology, University of Tennessee Health Science Center, 930 Madison Ave., Memphis, TN, 38163, USA.
- Research, Memphis VA Medical Center, Memphis, TN, 38104, USA.
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3
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Ouyang Z, Tan Z, Ali U, Zhang Y, Li B, Yao X, Yang B, Guo L. Ceramide-1-phosphate enhances defense responses against Sclerotinia sclerotiorum in Brassica napus. PLANT PHYSIOLOGY 2025; 197:kiae649. [PMID: 39928582 DOI: 10.1093/plphys/kiae649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2024] [Accepted: 10/27/2024] [Indexed: 02/12/2025]
Abstract
Sclerotinia stem rot caused by Sclerotinia sclerotiorum is one of the most severe diseases affecting the growth and production of Brassica napus. Sphingolipid metabolism plays a crucial role in plant response to pathogens. In this study, we show that ceramide kinase (CERK) is significantly induced during S. sclerotiorum infection to produce higher levels of ceramide-1-phosphate (C1P) in B. napus. The balance between ceramide (Cer) and C1P affects plant resistance to S. sclerotiorum, with CERK mutant lines exhibiting greater susceptibility to S. sclerotiorum and CERK overexpression lines showing enhanced resistance to this pathogen. Moreover, we identified candidate C1P-binding proteins by proteomic analysis and determined that C1P binds to and promotes the activity of a Gly-Asp-Ser-Leu lipase protein involved in B. napus resistance to S. sclerotiorum infection. In conclusion, our results indicate that C1P plays a key role in S. sclerotiorum resistance through metabolic regulation and signal transduction in B. napus.
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Affiliation(s)
- Zhewen Ouyang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China
| | - Zengdong Tan
- Yazhouwan National Laboratory, Sanya 572025, China
| | - Usman Ali
- State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450046, China
| | - Ying Zhang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
- The Provincial Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Bo Li
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
- The Provincial Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Xuan Yao
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China
- Yazhouwan National Laboratory, Sanya 572025, China
| | - Bao Yang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China
- Department of Biology, University of Missouri, St. Louis, MO 63121, USA
- Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Liang Guo
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China
- Yazhouwan National Laboratory, Sanya 572025, China
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4
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Merrill AH. Don't Be Surprised When These Surprise You: Some Infrequently Studied Sphingoid Bases, Metabolites, and Factors That Should Be Kept in Mind During Sphingolipidomic Studies. Int J Mol Sci 2025; 26:650. [PMID: 39859363 PMCID: PMC11765627 DOI: 10.3390/ijms26020650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2024] [Revised: 01/09/2025] [Accepted: 01/11/2025] [Indexed: 01/27/2025] Open
Abstract
Sphingolipidomic mass spectrometry has provided valuable information-and surprises-about sphingolipid structures, metabolism, and functions in normal biological processes and disease. Nonetheless, many noteworthy compounds are not routinely determined, such as the following: most of the sphingoid bases that mammals biosynthesize de novo other than sphingosine (and sometimes sphinganine) or acquire from exogenous sources; infrequently considered metabolites of sphingoid bases, such as N-(methyl)n-derivatives; "ceramides" other than the most common N-acylsphingosines; and complex sphingolipids other than sphingomyelins and simple glycosphingolipids, including glucosyl- and galactosylceramides, which are usually reported as "monohexosylceramides". These and other subspecies are discussed, as well as some of the circumstances when they are likely to be seen (or present and missed) due to experimental conditions that can influence sphingolipid metabolism, uptake from the diet or from the microbiome, or as artifacts produced during extraction and analysis. If these compounds and factors are kept in mind during the design and interpretation of lipidomic studies, investigators are likely to be surprised by how often they appear and thereby advance knowledge about them.
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Affiliation(s)
- Alfred H Merrill
- School of Biological Sciences and The Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
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Ouellette JM, Mallender MD, Hian-Cheong DJ, Scurto DL, Nicholas JE, Trumble SJ, Hawke TJ, Krause MP. Altered sphingolipid profile in response to skeletal muscle injury in a mouse model of type 1 diabetes mellitus. Am J Physiol Cell Physiol 2025; 328:C273-C287. [PMID: 39611411 DOI: 10.1152/ajpcell.00158.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 11/06/2024] [Accepted: 11/19/2024] [Indexed: 11/30/2024]
Abstract
A complication of type 1 diabetes mellitus (T1DM) is diabetic myopathy that includes reduced regenerative capacity of skeletal muscle. Sphingolipids are a diverse family of lipids with roles in skeletal muscle regeneration. Some studies have found changes in sphingolipid species levels in T1DM, however, the effect of T1DM on a sphingolipid panel in regenerating skeletal muscle has not been examined. Wild-type (WT) and diabetic Ins2Akita+/- (Akita) mice received cardiotoxin-induced muscle injury in their left quadriceps, gastrocnemius-plantaris-soleus, and tibialis anterior muscles with the contralateral muscles serving as uninjured controls. Muscles were collected at 1, 3, 5, or 7 days postinjury. In regenerating muscle from Akita mice, lipid staining with BODIPY 493/503 revealed increased intramyocellular and total lipids and perilipin-1-positive cell numbers as compared with WT. Liquid chromatography-mass spectrometry of quadriceps was used to identify sphingolipid levels in skeletal muscle. The C22:0 and C24:0 ceramides were significantly elevated in uninjured Akita, whereas ceramide C24:1 was decreased in injured Akita compared with WT. Ceramide-1-phosphate was increased in Akita compared with WT regardless of injury, whereas sphingosine-1-phosphate (S1P) was elevated with injury in WT but this response was muted in Akita mice. Western blotting of key enzymes involved in sphingolipid metabolism revealed S1P lyase, the enzyme that degrades S1P irreversibly, was significantly elevated in the injured muscle in Akita mice during regeneration, in accordance with lower S1P levels. This mouse model of T1DM demonstrates sphingolipidomic changes that may contribute to delayed muscle regeneration.NEW & NOTEWORTHY Muscle lipids become elevated, and the sphingolipid profile is altered by T1DM in skeletal muscle regeneration. A loss of S1P is accompanied by greater expression of sphingosine-1-phosphate lyase (SPL) in response to injury in Akita mice, suggesting a role for sphingolipids in the attenuated repair of skeletal muscle in T1DM rodent models. Although ceramide-1-phosphate (C1P) is increased with T1DM, there was no increase in ceramide kinase (CerK) suggesting an alternative route of ceramide phosphorylation in skeletal muscle.
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Affiliation(s)
- Jacob M Ouellette
- Department of Kinesiology, Faculty of Human Kinetics, University of Windsor, Windsor, Ontario, Canada
| | - Michael D Mallender
- Department of Kinesiology, Faculty of Human Kinetics, University of Windsor, Windsor, Ontario, Canada
| | - Dylan J Hian-Cheong
- Department of Kinesiology, Faculty of Human Kinetics, University of Windsor, Windsor, Ontario, Canada
| | - Daniel L Scurto
- Department of Kinesiology, Faculty of Human Kinetics, University of Windsor, Windsor, Ontario, Canada
| | - James E Nicholas
- Department of Kinesiology, Faculty of Human Kinetics, University of Windsor, Windsor, Ontario, Canada
| | | | - Thomas J Hawke
- Department of Pathology & Molecular Medicine, Faculty of Health Science, McMaster University, Hamilton, Ontario, Canada
| | - Matthew P Krause
- Department of Kinesiology, Faculty of Human Kinetics, University of Windsor, Windsor, Ontario, Canada
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Jia W, Yuan J, Zhang J, Li S, Lin W, Cheng B. Bioactive sphingolipids as emerging targets for signal transduction in cancer development. Biochim Biophys Acta Rev Cancer 2024; 1879:189176. [PMID: 39233263 DOI: 10.1016/j.bbcan.2024.189176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 08/28/2024] [Accepted: 08/28/2024] [Indexed: 09/06/2024]
Abstract
Sphingolipids, crucial components of cellular membranes, play a vital role in maintaining cellular structure and signaling integrity. Disruptions in sphingolipid metabolism are increasingly implicated in cancer development. Key bioactive sphingolipids, such as ceramides, sphingosine-1-phosphate (S1P), ceramide-1-phosphate (C1P), and glycosphingolipids, profoundly impact tumor biology. They influence the behavior of tumor cells, stromal cells, and immune cells, affecting tumor aggressiveness, angiogenesis, immune modulation, and extracellular matrix remodeling. Furthermore, abnormal expression of sphingolipids and their metabolizing enzymes modulates the secretion of tumor-derived extracellular vesicles (TDEs), which are key players in creating an immunosuppressive tumor microenvironment, remodeling the extracellular matrix, and facilitating oncogenic signaling within in situ tumors and distant pre-metastatic niches (PMNs). Understanding the role of sphingolipids in the biogenesis of tumor-derived extracellular vesicles (TDEs) and their bioactive contents can pave the way for new biomarkers in cancer diagnosis and prognosis, ultimately enhancing comprehensive tumor treatment strategies.
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Affiliation(s)
- Wentao Jia
- Department of General Practice, The First Affiliated Hospital of Naval Medical University, Shanghai 200433, China; Oncology Department of Traditional Chinese Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai 200433, China; Faculty of Traditional Chinese Medicine, Naval Medical University, Shanghai 200043, China
| | - Jiaying Yuan
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jinbo Zhang
- Department of Pharmacy, Tianjin Rehabilitation and Recuperation Center, Joint Logistics Support Force, Tianjin 300000, China
| | - Shu Li
- Department of Gastroenterology, Baoshan Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201900, China
| | - Wanfu Lin
- Oncology Department of Traditional Chinese Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai 200433, China; Faculty of Traditional Chinese Medicine, Naval Medical University, Shanghai 200043, China.
| | - Binbin Cheng
- Oncology Department of Traditional Chinese Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai 200433, China; Faculty of Traditional Chinese Medicine, Naval Medical University, Shanghai 200043, China.
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7
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Lee AH, Snider JM, Moorthi S, Coant N, Trayssac M, Canals D, Clarke CJ, Luberto C, Hannun YA. A comprehensive measure of Golgi sphingolipid flux using NBD C 6-ceramide: evaluation of sphingolipid inhibitors. J Lipid Res 2024; 65:100584. [PMID: 38925252 PMCID: PMC11326893 DOI: 10.1016/j.jlr.2024.100584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/13/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024] Open
Abstract
Measurements of sphingolipid metabolism are most accurately performed by LC-MS. However, this technique is expensive, not widely accessible, and without the use of specific probes, it does not provide insight into metabolic flux through the pathway. Employing the fluorescent ceramide analogue NBD-C6-ceramide as a tracer in intact cells, we developed a comprehensive HPLC-based method that simultaneously measures the main nodes of ceramide metabolism in the Golgi. Hence, by quantifying the conversion of NBD-C6-ceramide to NBD-C6-sphingomyelin, NBD-C6-hexosylceramides, and NBD-C6-ceramide-1-phosphate (NBD-C1P), the activities of Golgi resident enzymes sphingomyelin synthase 1, glucosylceramide synthase, and ceramide kinase (CERK) could be measured simultaneously. Importantly, the detection of NBD-C1P allowed us to quantify CERK activity in cells, a usually difficult task. By applying this method, we evaluated the specificity of commonly used sphingolipid inhibitors and discovered that 1-phenyl-2-decanoylamino-3-morpholino-1-propanol, which targets glucosylceramide synthase, and fenretinide (4HPR), an inhibitor for dihydroceramide desaturase, also suppress CERK activity. This study demonstrates the benefit of an expanded analysis of ceramide metabolism in the Golgi, and it provides a qualitative and easy-to-implement method.
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Affiliation(s)
- Allen H Lee
- Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Justin M Snider
- Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Sitapriya Moorthi
- Department of Physiology and Biophysics, Stony Brook University, Stony Brook, NY, USA
| | - Nicolas Coant
- Department of Pathology, Stony Brook University, Stony Brook, NY, USA
| | - Magali Trayssac
- Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Daniel Canals
- Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | | | - Chiara Luberto
- Department of Physiology and Biophysics, Stony Brook University, Stony Brook, NY, USA
| | - Yusuf A Hannun
- Department of Medicine, Stony Brook University, Stony Brook, NY, USA; Department of Pathology, Stony Brook University, Stony Brook, NY, USA; Department of Medicine, The Northport Veterans Affairs Hospital, Northport, NY, USA.
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Gary AA, Prislovsky A, Tovar A, Locatelli E, Felix ER, Stephenson D, Chalfant CE, Lai J, Kim C, Mandal N, Galor A. Lipids from ocular meibum and tears may serve as biomarkers for depression and post-traumatic stress disorder. Clin Exp Ophthalmol 2024; 52:516-527. [PMID: 38146655 PMCID: PMC11199378 DOI: 10.1111/ceo.14343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 11/14/2023] [Accepted: 12/01/2023] [Indexed: 12/27/2023]
Abstract
BACKGROUND There is a need to develop biomarkers for diagnosis and prediction of treatment responses in depression and post-traumatic stress disorder (PTSD). METHODS Cross-sectional study examining correlations between tear inflammatory proteins, meibum and tear sphingolipids, and symptoms of depression and PTSD-associated anxiety. Ninety individuals filled depression (Patient Health Questionnaire 9, PHQ-9) and PTSD-associated anxiety (PTSD Checklist-Military Version, PCL-M) questionnaires. In 40 patients, a multiplex assay system was used to quantify 23 inflammatory proteins in tears. In a separate group of 50 individuals, liquid chromatography-mass spectrometry was performed on meibum and tears to quantify 34 species of sphingolipids, encompassing ceramides, monohexosyl ceramides and sphingomyelins. RESULTS The mean age of the population was 59.4 ± 11.0 years; 89.0% self-identified as male, 34.4% as White, 64.4% as Black, and 16.7% as Hispanic. The mean PHQ-9 score was 11.1 ± 7.6, and the mean PCL-M score was 44.3 ± 19.1. Symptoms of depression and PTSD-associated anxiety were highly correlated (ρ =0.75, p < 0.001). Both PHQ9 and PCL-M scores negatively correlated with multiple sphingolipid species in meibum and tears. In multivariable models, meibum Monohexosyl Ceramide 26:0 (pmol), tear Ceramide 16:0 (mol%), meibum Monohexosyl Ceramide 16:0 (mol%), and tear Ceramide 26:1 (mol%) remained associated with depression and meibum Monohexosyl Ceramide 16:0 (mol%), meibum Monohexosyl Ceramide 26:0 (pmol), tear Sphingomyelin 20:0 (mol%), and tear Sphingosine-1-Phosphate (mol%) remained associated with PTSD-associated anxiety. CONCLUSIONS Certain meibum and tear sphingolipid species were related to mental health indices. These interactions present opportunities for innovative diagnostic and therapeutic approaches for mental health disorders.
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Affiliation(s)
- Ashlyn A. Gary
- Miller School of Medicine, University of Miami, Miami, FL, USA
| | | | - Arianna Tovar
- Surgical Services, Miami Veterans Affairs Medical Center, Miami, FL, USA
| | - Elyana Locatelli
- Surgical Services, Miami Veterans Affairs Medical Center, Miami, FL, USA
- Bascom Palmer Eye Institute, University of Miami, Miami, FL, USA
| | - Elizabeth R. Felix
- Research Service, Miami Veterans Affairs Medical Center, Miami, FL, USA
- Department of Physical Medicine & Rehabilitation, University of Miami, Miami, FL, USA
| | - Daniel Stephenson
- Departments of Medicine and Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Charles E. Chalfant
- Departments of Medicine and Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - James Lai
- Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Colin Kim
- Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Nawajes Mandal
- Memphis VA Medical Center, Memphis, TN, USA
- Depts. of Ophthalmology, Anatomy and Neurobiology and Pharmaceutical Sciences, University of Tennessee Health Sciences Center, Hamilton Eye Institute, Memphis, TN, USA
| | - Anat Galor
- Surgical Services, Miami Veterans Affairs Medical Center, Miami, FL, USA
- Bascom Palmer Eye Institute, University of Miami, Miami, FL, USA
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Tian L, Zhao C, Yan Y, Jia Q, Cui S, Chen H, Li X, Jiang H, Yao Y, He K, Zhao X. Ceramide-1-phosphate alleviates high-altitude pulmonary edema by stabilizing circadian ARNTL-mediated mitochondrial dynamics. J Adv Res 2024; 60:75-92. [PMID: 37479181 PMCID: PMC11156611 DOI: 10.1016/j.jare.2023.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/25/2023] [Accepted: 07/18/2023] [Indexed: 07/23/2023] Open
Abstract
INTRODUCTION High-altitude pulmonary edema (HAPE) is a severe and potentially fatal condition with limited treatment options. Although ceramide kinase (CERK)-derived ceramide-1-phosphate (C1P) has been demonstrated to offer protection against various pulmonary diseases, its effects on HAPE remain unclear. OBJECTIVES Our study aimed to investigate the potential role of CERK-derived C1P in the development of HAPE and to reveal the molecular mechanisms underlying its protective effects. We hypothesized that CERK-derived C1P could protect against HAPE by stabilizing circadian rhythms and maintaining mitochondrial dynamics. METHODS To test our hypothesis, we used CERK-knockout mice and established HAPE mouse models using a FLYDWC50-1C hypobaric hypoxic cabin. We utilized a range of methods, including lipidomics, transcriptomics, immunofluorescence, Western blotting, and transmission electron microscopy, to identify the mechanisms of regulation. RESULTS Our findings demonstrated that CERK-derived C1P played a protective role against HAPE. Inhibition of CERK exacerbated HAPE induced by the hypobaric hypoxic environment. Specifically, we identified a novel mechanism in which CERK inhibition induced aryl hydrocarbon receptor nuclear translocator-like (ARNTL) autophagic degradation, inducing the circadian rhythm and triggering mitochondrial damage by controlling the expression of proteins required for mitochondrial fission and fusion. The decreased ARNTL caused by CERK inhibition impaired mitochondrial dynamics, induced oxidative stress damage, and resulted in defects in mitophagy, particularly under hypoxia. Exogenous C1P prevented ARNTL degradation, alleviated mitochondrial damage, neutralized oxidative stress induced by CERK inhibition, and ultimately relieved HAPE. CONCLUSIONS This study provides evidence for the protective effect of C1P against HAPE, specifically, through stabilizing circadian rhythms and maintaining mitochondrial dynamics. Exogenous C1P therapy may be a promising strategy for treating HAPE. Our findings also highlight the importance of the circadian rhythm and mitochondrial dynamics in the pathogenesis of HAPE, suggesting that targeting these pathways may be a potential therapeutic approach for this condition.
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Affiliation(s)
- Liuyang Tian
- School of Medicine, Nankai University, Tianjin 300071, China; Medical Big Data Research Center, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China; National Engineering Research Center for Medical Big Data Application Technology, the Chinese PLA General Hospital, Beijing 100853, China
| | - Chenghui Zhao
- National Engineering Research Center for Medical Big Data Application Technology, the Chinese PLA General Hospital, Beijing 100853, China; Research Center for Biomedical Engineering, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China
| | - Yan Yan
- Research Center for Translational Medicine, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China
| | - Qian Jia
- National Engineering Research Center for Medical Big Data Application Technology, the Chinese PLA General Hospital, Beijing 100853, China; Research Center for Translational Medicine, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China
| | - Saijia Cui
- Research Center for Translational Medicine, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China
| | - Huining Chen
- Research Center for Translational Medicine, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China
| | - Xiaolu Li
- Experimental Research Center, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University Beijing Anzhen Hospital, Beijing 100029, China
| | - Hongfeng Jiang
- Experimental Research Center, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University Beijing Anzhen Hospital, Beijing 100029, China
| | - Yongming Yao
- Research Center for Translational Medicine, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China.
| | - Kunlun He
- Medical Big Data Research Center, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China; National Engineering Research Center for Medical Big Data Application Technology, the Chinese PLA General Hospital, Beijing 100853, China; School of Medicine, Nankai University, Tianjin 300071, China.
| | - Xiaojing Zhao
- National Engineering Research Center for Medical Big Data Application Technology, the Chinese PLA General Hospital, Beijing 100853, China; Research Center for Translational Medicine, Medical Innovation Research Division of the Chinese PLA General Hospital, Beijing 100853, China.
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10
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Tahia F, Basu SK, Prislovsky A, Mondal K, Ma D, Kochat H, Brown K, Stephenson DJ, Chalfant CE, Mandal N. Sphingolipid biosynthetic inhibitor L-Cycloserine prevents oxidative-stress-mediated death in an in vitro model of photoreceptor-derived 661W cells. Exp Eye Res 2024; 242:109852. [PMID: 38460719 PMCID: PMC11089890 DOI: 10.1016/j.exer.2024.109852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 03/01/2024] [Accepted: 03/03/2024] [Indexed: 03/11/2024]
Abstract
Oxidative stress plays a pivotal role in the pathogenesis of several neurodegenerative diseases. Retinal degeneration causes irreversible death of photoreceptor cells, ultimately leading to vision loss. Under oxidative stress, the synthesis of bioactive sphingolipid ceramide increases, triggering apoptosis in photoreceptor cells and leading to their death. This study investigates the effect of L-Cycloserine, a small molecule inhibitor of ceramide biosynthesis, on sphingolipid metabolism and the protection of photoreceptor-derived 661W cells from oxidative stress. The results demonstrate that treatment with L-Cycloserine, an inhibitor of Serine palmitoyl transferase (SPT), markedly decreases bioactive ceramide and associated sphingolipids in 661W cells. A nontoxic dose of L-Cycloserine can provide substantial protection of 661W cells against H2O2-induced oxidative stress by reversing the increase in ceramide level observed under oxidative stress conditions. Analysis of various antioxidant, apoptotic and sphingolipid pathway genes and proteins also confirms the ability of L-Cycloserine to modulate these pathways. Our findings elucidate the generation of sphingolipid mediators of cell death in retinal cells under oxidative stress and the potential of L-Cycloserine as a therapeutic candidate for targeting ceramide-induced degenerative diseases by inhibiting SPT. The promising therapeutic prospect identified in our findings lays the groundwork for further validation in in-vivo and preclinical models of retinal degeneration.
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Affiliation(s)
- Faiza Tahia
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA; Department of Ophthalmology, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Sandip K Basu
- Department of Ophthalmology, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Amanda Prislovsky
- Department of Ophthalmology, University of Tennessee Health Science Center, Memphis, TN, 38163, USA; Memphis VA Medical Center, Memphis, TN, 38104, USA
| | - Koushik Mondal
- Department of Ophthalmology, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Dejian Ma
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Harry Kochat
- Plough Center for Sterile Drug Delivery Solutions, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Kennard Brown
- Office of Executive Vice Chancellor and Chief Operations Officer, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Daniel J Stephenson
- Departments of Medicine and Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, 22903, USA
| | - Charles E Chalfant
- Departments of Medicine and Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, 22903, USA; Research Service, Richmond Veterans Administration Medical Center, Richmond VA, 23298, USA
| | - Nawajes Mandal
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA; Department of Ophthalmology, University of Tennessee Health Science Center, Memphis, TN, 38163, USA; Memphis VA Medical Center, Memphis, TN, 38104, USA; Department of Anatomy and Neurobiology, University of Tennessee Health Science Center, Memphis, TN, 38163, USA.
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11
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Read CB, Ali AN, Stephenson DJ, Macknight HP, Maus KD, Cockburn CL, Kim M, Xie X, Carlyon JA, Chalfant CE. Ceramide-1-phosphate is a regulator of Golgi structure and is co-opted by the obligate intracellular bacterial pathogen Anaplasma phagocytophilum. mBio 2024; 15:e0029924. [PMID: 38415594 PMCID: PMC11005342 DOI: 10.1128/mbio.00299-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 02/29/2024] Open
Abstract
Many intracellular pathogens structurally disrupt the Golgi apparatus as an evolutionarily conserved promicrobial strategy. Yet, the host factors and signaling processes involved are often poorly understood, particularly for Anaplasma phagocytophilum, the agent of human granulocytic anaplasmosis. We found that A. phagocytophilum elevated cellular levels of the bioactive sphingolipid, ceramide-1-phosphate (C1P), to promote Golgi fragmentation that enables bacterial proliferation, conversion from its non-infectious to infectious form, and productive infection. A. phagocytophilum poorly infected mice deficient in ceramide kinase, the Golgi-localized enzyme responsible for C1P biosynthesis. C1P regulated Golgi morphology via activation of a PKCα/Cdc42/JNK signaling axis that culminates in phosphorylation of Golgi structural proteins, GRASP55 and GRASP65. siRNA-mediated depletion of Cdc42 blocked A. phagocytophilum from altering Golgi morphology, which impaired anterograde trafficking of trans-Golgi vesicles into and maturation of the pathogen-occupied vacuole. Cells overexpressing phosphorylation-resistant versions of GRASP55 and GRASP65 presented with suppressed C1P- and A. phagocytophilum-induced Golgi fragmentation and poorly supported infection by the bacterium. By studying A. phagocytophilum, we identify C1P as a regulator of Golgi structure and a host factor that is relevant to disease progression associated with Golgi fragmentation.IMPORTANCECeramide-1-phosphate (C1P), a bioactive sphingolipid that regulates diverse processes vital to mammalian physiology, is linked to disease states such as cancer, inflammation, and wound healing. By studying the obligate intracellular bacterium Anaplasma phagocytophilum, we discovered that C1P is a major regulator of Golgi morphology. A. phagocytophilum elevated C1P levels to induce signaling events that promote Golgi fragmentation and increase vesicular traffic into the pathogen-occupied vacuole that the bacterium parasitizes. As several intracellular microbial pathogens destabilize the Golgi to drive their infection cycles and changes in Golgi morphology is also linked to cancer and neurodegenerative disorder progression, this study identifies C1P as a potential broad-spectrum therapeutic target for infectious and non-infectious diseases.
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Affiliation(s)
- Curtis B. Read
- Department of Microbiology and Immunology, Virginia Commonwealth University Medical Center, School of Medicine, Richmond, Virginia, USA
| | - Anika N. Ali
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, Florida, USA
| | - Daniel J. Stephenson
- Division of Hematology & Oncology, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - H. Patrick Macknight
- Division of Hematology & Oncology, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Kenneth D. Maus
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, Florida, USA
| | - Chelsea L. Cockburn
- Department of Microbiology and Immunology, Virginia Commonwealth University Medical Center, School of Medicine, Richmond, Virginia, USA
| | - Minjung Kim
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, Florida, USA
| | - Xiujie Xie
- Division of Hematology & Oncology, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Jason A. Carlyon
- Department of Microbiology and Immunology, Virginia Commonwealth University Medical Center, School of Medicine, Richmond, Virginia, USA
| | - Charles E. Chalfant
- Division of Hematology & Oncology, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA
- Department of Cell Biology, University of Virginia, Charlottesville, Virginia, USA
- Program in Cancer Biology, University of Virginia Cancer Center, Charlottesville, Virginia, USA
- Research Service, Richmond Veterans Administration Medical Center, Richmond, Virginia, USA
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12
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Mangwani-Mordani S, Prislovsky A, Stephenson D, Chalfant CE, Galor A, Mandal N. Role of Polyunsaturated Fatty Acids (PUFAs) and Eicosanoids on Dry Eye Symptoms and Signs. Biomolecules 2024; 14:376. [PMID: 38540794 PMCID: PMC10968634 DOI: 10.3390/biom14030376] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 01/30/2025] Open
Abstract
Polyunsaturated fatty acids (PUFAs) generate pro- and anti-inflammatory eicosanoids via three different metabolic pathways. This study profiled tear PUFAs and their metabolites and examined the relationships with dry eye (DE) and meibomian gland dysfunction (MGD) symptoms and signs. A total of 40 individuals with normal eyelids and corneal anatomies were prospectively recruited. The symptoms and signs of DE and MGD were assessed, and tear samples (from the right eye) were analyzed by mass spectrometry. Mann-Whitney U tests assessed differences between medians; Spearman tests assessed correlations between continuous variables; and linear regression models assessed the impact of potential confounders. The median age was 63 years; 95% were male; 30% were White; and 85% were non-Hispanic. The symptoms of DE/MGD were not correlated with tear PUFAs and eicosanoids. DE signs (i.e., tear break-up time (TBUT) and Schirmer's) negatively correlated with anti-inflammatory eicosanoids (11,12-dihydroxyeicosatrienoic acid (11,12 DHET) and 14,15-dihydroxyicosatrienoic acid (14,15, DHET)). Corneal staining positively correlated with the anti-inflammatory PUFA, docosahexaenoic acid (DHA). MGD signs significantly associated with the pro-inflammatory eicosanoid 15-hydroxyeicosatetranoic acid (15-HETE) and DHA. Several relationships remained significant when potential confounders were considered. DE/MGD signs relate more to tear PUFAs and eicosanoids than symptoms. Understanding the impact of PUFA-related metabolic pathways in DE/MGD may provide targets for new therapeutic interventions.
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Affiliation(s)
- Simran Mangwani-Mordani
- Surgical Services, Department of Ophthalmology, Miami Veterans Affairs Medical Center, 1201 NW 17th Street, Miami, FL 33125, USA;
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, 900 NW 17th Street, Miami, FL 33136, USA
| | - Amanda Prislovsky
- Memphis VA Medical Center, 1030 Jefferson Avenue, Memphis, TN 38104, USA
| | - Daniel Stephenson
- Departments of Medicine and Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
| | - Charles E. Chalfant
- Departments of Medicine and Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
- Research Service, Richmond Veterans Administration Medical Center, Richmond VA 23298, USA
| | - Anat Galor
- Surgical Services, Department of Ophthalmology, Miami Veterans Affairs Medical Center, 1201 NW 17th Street, Miami, FL 33125, USA;
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, 900 NW 17th Street, Miami, FL 33136, USA
| | - Nawajes Mandal
- Memphis VA Medical Center, 1030 Jefferson Avenue, Memphis, TN 38104, USA
- Hamilton Eye Institute, Department of Ophthalmology, Anatomy and Neurobiology, The University of Tennessee Health Science Center, 930 Madison Ave, Memphis, TN 38163, USA
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13
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Mandal N, Stentz F, Asuzu PC, Nyenwe E, Wan J, Dagogo-Jack S. Plasma Sphingolipid Profile of Healthy Black and White Adults Differs Based on Their Parental History of Type 2 Diabetes. J Clin Endocrinol Metab 2024; 109:740-749. [PMID: 37804534 PMCID: PMC10876402 DOI: 10.1210/clinem/dgad595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 09/18/2023] [Accepted: 10/05/2023] [Indexed: 10/09/2023]
Abstract
CONTEXT Ceramides and sphingolipids have been linked to type 2 diabetes (T2D). The Ceramides and Sphingolipids as Predictors of Incident Dysglycemia (CASPID) study is designed to determine the association of plasma sphingolipids with the pathophysiology of human T2D. OBJECTIVE A comparison of plasma sphingolipids profiles in Black and White adults with (FH+) and without (FH-) family history of T2D. DESIGN We recruited 100 Black and White FH- (54 Black, 46 White) and 140 FH+ (75 Black, 65 White) adults. Fasting plasma levels of 58 sphingolipid species, including 18 each from 3 major classes (ceramides, monohexosylceramides, and sphingomyelins, all with 18:1 sphingoid base) and 4 long-chain sphingoid base-containing species, were measured by liquid chromatography/mass spectrometry. RESULTS Sphingomyelin was the most abundant sphingolipid in plasma (89% in FH-), and was significantly elevated in FH+ subjects (93%). Ceramides and monohexosylceramides comprised 5% and 6% of total sphingolipids in the plasma of FH- subjects, and were reduced significantly in FH+ subjects (3% and 4%, respectively). In FH+ subjects, most ceramide and monohexosylceramide species were decreased but sphingomyelin species were increased. The level of C18:1 species of all 3 classes was elevated in FH+ subjects. CONCLUSION Elevated levels of sphingomyelin, the major sphingolipids of plasma, and oleic acid-containing sphingolipids in healthy FH+ subjects compared with healthy FH- subjects may reflect heritable elements linking sphingolipids and the development of T2D.
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Affiliation(s)
- Nawajes Mandal
- Departments of Ophthalmology, Anatomy and Neurobiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
- Research, Memphis VA Medical Center, Memphis, TN 38104, USA
| | - Frankie Stentz
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Peace Chiamaka Asuzu
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Ebenezer Nyenwe
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Jim Wan
- Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Sam Dagogo-Jack
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Tennessee Health Science Center, Memphis, TN 38163, USA
- General Clinical Research Center, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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14
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Maus KD, Stephenson DJ, Macknight HP, Vu NT, Hoeferlin LA, Kim M, Diegelmann RF, Xie X, Chalfant CE. Skewing cPLA 2α activity toward oxoeicosanoid production promotes neutrophil N2 polarization, wound healing, and the response to sepsis. Sci Signal 2023; 16:eadd6527. [PMID: 37433004 PMCID: PMC10565596 DOI: 10.1126/scisignal.add6527] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 06/16/2023] [Indexed: 07/13/2023]
Abstract
Uncontrolled inflammation is linked to poor outcomes in sepsis and wound healing, both of which proceed through distinct inflammatory and resolution phases. Eicosanoids are a class of bioactive lipids that recruit neutrophils and other innate immune cells. The interaction of ceramide 1-phosphate (C1P) with the eicosanoid biosynthetic enzyme cytosolic phospholipase A2 (cPLA2) reduces the production of a subtype of eicosanoids called oxoeicosanoids. We investigated the effect of shifting the balance in eicosanoid biosynthesis on neutrophil polarization and function. Knockin mice expressing a cPLA2 mutant lacking the C1P binding site (cPLA2αKI/KI mice) showed enhanced and sustained neutrophil infiltration into wounds and the peritoneum during the inflammatory phase of wound healing and sepsis, respectively. The mice exhibited improved wound healing and reduced susceptibility to sepsis, which was associated with an increase in anti-inflammatory N2-type neutrophils demonstrating proresolution behaviors and a decrease in proinflammatory N1-type neutrophils. The N2 polarization of cPLA2αKI/KI neutrophils resulted from increased oxoeicosanoid biosynthesis and autocrine signaling through the oxoeicosanoid receptor OXER1 and partially depended on OXER1-dependent inhibition of the pentose phosphate pathway (PPP). Thus, C1P binding to cPLA2α suppresses neutrophil N2 polarization, thereby impairing wound healing and the response to sepsis.
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Affiliation(s)
- Kenneth D Maus
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA
| | - Daniel J Stephenson
- Department of Medicine, Division of Hematology and Oncology, University of Virginia, Charlottesville, VA 22903, USA
| | - H Patrick Macknight
- Department of Medicine, Division of Hematology and Oncology, University of Virginia, Charlottesville, VA 22903, USA
| | - Ngoc T Vu
- Department of Applied Biochemistry, School of Biotechnology, International University-VNU HCM, Ho Chi Minh City, Vietnam
| | - L Alexis Hoeferlin
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University-School of Medicine, Richmond VA 23298, USA
| | - Minjung Kim
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA
| | - Robert F Diegelmann
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University-School of Medicine, Richmond VA 23298, USA
| | - Xiujie Xie
- Department of Medicine, Division of Hematology and Oncology, University of Virginia, Charlottesville, VA 22903, USA
| | - Charles E Chalfant
- Department of Medicine, Division of Hematology and Oncology, University of Virginia, Charlottesville, VA 22903, USA
- Department of Cell Biology, University of Virginia, Charlottesville, VA 22903, USA
- Program in Cancer Biology, University of Virginia Cancer Center, Charlottesville, VA 22903, USA
- Research Service, Richmond Veterans Administration Medical Center, Richmond VA, 23298, USA
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15
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Stephenson DJ, MacKnight HP, Hoeferlin LA, Washington SL, Sawyers C, Archer KJ, Strauss JF, Walsh SW, Chalfant CE. Bioactive lipid mediators in plasma are predictors of preeclampsia irrespective of aspirin therapy. J Lipid Res 2023; 64:100377. [PMID: 37119922 PMCID: PMC10230265 DOI: 10.1016/j.jlr.2023.100377] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 04/13/2023] [Accepted: 04/18/2023] [Indexed: 05/01/2023] Open
Abstract
There are few early biomarkers to identify pregnancies at risk of preeclampsia (PE) and abnormal placental function. In this cross-sectional study, we utilized targeted ultra-performance liquid chromatography-ESI MS/MS and a linear regression model to identify specific bioactive lipids that serve as early predictors of PE. Plasma samples were collected from 57 pregnant women prior to 24-weeks of gestation with outcomes of either PE (n = 26) or uncomplicated term pregnancies (n = 31), and the profiles of eicosanoids and sphingolipids were evaluated. Significant differences were revealed in the eicosanoid, (±)11,12 DHET, as well as multiple classes of sphingolipids; ceramides, ceramide-1-phosphate, sphingomyelin, and monohexosylceramides; all of which were associated with the subsequent development of PE regardless of aspirin therapy. Profiles of these bioactive lipids were found to vary based on self-designated race. Additional analyses demonstrated that PE patients can be stratified based on the lipid profile as to PE with a preterm birth linked to significant differences in the levels of 12-HETE, 15-HETE, and resolvin D1. Furthermore, subjects referred to a high-risk OB/GYN clinic had higher levels of 20-HETE, arachidonic acid, and Resolvin D1 versus subjects recruited from a routine, general OB/GYN clinic. Overall, this study shows that quantitative changes in plasma bioactive lipids detected by ultra-performance liquid chromatography-ESI-MS/MS can serve as an early predictor of PE and stratify pregnant people for PE type and risk.
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Affiliation(s)
- Daniel J Stephenson
- Division of Hematology & Oncology, Department of Medicine, University of Virginia, Charlottesville, VA, USA
| | - H Patrick MacKnight
- Division of Hematology & Oncology, Department of Medicine, University of Virginia, Charlottesville, VA, USA
| | - L Alexis Hoeferlin
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University (VCU), Richmond, VA, USA
| | - Sonya L Washington
- Department of Obstetrics and Gynecology, Virginia Commonwealth University, Richmond, VA, USA
| | - Chelsea Sawyers
- Virginia Institute for Psychiatric & Behavioral Genetics, Virginia Commonwealth University School of Medicine, Richmond, VA, USA
| | - Kellie J Archer
- Division of Biostatistics, The Ohio State University College of Public Health, Columbus, OH, USA
| | - Jerome F Strauss
- Department of Obstetrics and Gynecology, Virginia Commonwealth University, Richmond, VA, USA
| | - Scott W Walsh
- Department of Obstetrics and Gynecology, Virginia Commonwealth University, Richmond, VA, USA.
| | - Charles E Chalfant
- Division of Hematology & Oncology, Department of Medicine, University of Virginia, Charlottesville, VA, USA; Department of Biochemistry and Molecular Biology, Virginia Commonwealth University (VCU), Richmond, VA, USA; Department of Cell Biology, University of Virginia, Charlottesville, VA, USA; Program in Cancer Biology, University of Virginia Cancer Center, Charlottesville, VA, USA; Research Service, Richmond Veterans Administration Medical Center, Richmond, VA, USA.
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16
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Francis M, Ahmad A, Bodgi L, Azzam P, Youssef T, Daher AA, Eid AA, Fornoni A, Pollack A, Marples B, Zeidan YH. SMPDL3b modulates radiation-induced DNA damage response in renal podocytes. FASEB J 2022; 36:e22545. [PMID: 36094323 PMCID: PMC11934431 DOI: 10.1096/fj.202100186rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 08/24/2022] [Accepted: 08/29/2022] [Indexed: 11/17/2024]
Abstract
The kidneys are radiosensitive and dose-limiting organs for radiotherapy (RT) targeting abdominal and paraspinal tumors. Excessive radiation doses to the kidneys ultimately lead to radiation nephropathy. Our prior work unmasked a novel role for the lipid-modifying enzyme, sphingomyelin phosphodiesterase acid-like 3b (SMPDL3b), in regulating the response of renal podocytes to radiation injury. In this study, we investigated the role of SMPDL3b in DNA double-strand breaks (DSBs) repair in vitro and in vivo. We assessed the kinetics of DSBs recognition and repair along with the ATM pathway and nuclear sphingolipid metabolism in wild-type (WT) and SMPDL3b overexpressing (OE) human podocytes. We also assessed the extent of DNA damage repair in SMPDL3b knock-down (KD) human podocytes, and C57BL6 WT and podocyte-specific SMPDL3b-knock out (KO) mice after radiation injury. We found that SMPDL3b overexpression enhanced DSBs recognition and repair through modulating ATM nuclear shuttling. OE podocytes were protected against radiation-induced apoptosis by increasing the phosphorylation of p53 at serine 15 and attenuating subsequent caspase-3 cleavage. SMPDL3b overexpression prevented radiation-induced alterations in nuclear ceramide-1-phosphate (C1P) and ceramide levels. Interestingly, exogenous C1P pretreatment radiosensitized OE podocytes by delaying ATM nuclear foci formation and DSBs repair. On the other hand, SMPDL3b knock-down, in vitro and in vivo, induced a significant delay in DSBs repair. Additionally, increased activation of apoptosis was induced in podocytes of SMPDL3b-KO mice compared to WT mice at 24 h post-irradiation. Together, our results unravel a novel role for SMPDL3b in radiation-induced DNA damage response. The current work suggests that SMPDL3b modulates nuclear sphingolipid metabolism, ATM nuclear shuttling, and DSBs repair.
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Affiliation(s)
- Marina Francis
- Department of Anatomy, Cell Biology, and Physiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Anis Ahmad
- Department of Radiation Oncology, Miller School of Medicine/Sylvester Cancer Center, University of Miami, Miami, Florida, USA
| | - Larry Bodgi
- Department of Radiation Oncology, American University of Beirut, Beirut, Lebanon
| | - Patrick Azzam
- Department of Anatomy, Cell Biology, and Physiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Tarek Youssef
- Department of Anatomy, Cell Biology, and Physiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Alaa Abou Daher
- Department of Anatomy, Cell Biology, and Physiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Assaad A. Eid
- Department of Anatomy, Cell Biology, and Physiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Alessia Fornoni
- Peggy and Harold Katz Family Drug Discovery Center and Katz Family Division of Nephrology and Hypertension, Department of Medicine, University of Miami, Miami, Florida, USA
| | - Alan Pollack
- Department of Radiation Oncology, Miller School of Medicine/Sylvester Cancer Center, University of Miami, Miami, Florida, USA
| | - Brian Marples
- Department of Radiation Oncology, University of Rochester, Rochester, New York, USA
| | - Youssef H. Zeidan
- Department of Anatomy, Cell Biology, and Physiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
- Department of Radiation Oncology, American University of Beirut, Beirut, Lebanon
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17
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Vu NT, Kim M, Stephenson DJ, MacKnight HP, Chalfant CE. Ceramide Kinase Inhibition Drives Ferroptosis and Sensitivity to Cisplatin in Mutant KRAS Lung Cancer by Dysregulating VDAC-Mediated Mitochondria Function. Mol Cancer Res 2022; 20:1429-1442. [PMID: 35560154 PMCID: PMC9444881 DOI: 10.1158/1541-7786.mcr-22-0085] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/15/2022] [Accepted: 05/11/2022] [Indexed: 11/16/2022]
Abstract
Ceramide kinase (CERK) is the mammalian lipid kinase from which the bioactive sphingolipid, ceramide-1-phosphate (C1P), is derived. CERK has been implicated in several promalignant phenotypes with little known as to mechanistic underpinnings. In this study, the mechanism of how CERK inhibition decreases cell survival in mutant (Mut) KRAS non-small cell lung cancer (NSCLC), a major lung cancer subtype, was revealed. Specifically, NSCLC cells possessing a KRAS mutation were more responsive to inhibition, downregulation, and genetic ablation of CERK compared with those with wild-type (WT) KRAS regarding a reduction in cell survival. Inhibition of CERK induced ferroptosis in Mut KRAS NSCLC cells, which required elevating VDAC-regulated mitochondria membrane potential (MMP) and the generation of cellular reactive oxygen species (ROS). Importantly, through modulation of VDAC, CERK inhibition synergized with the first-line NSCLC treatment, cisplatin, in reducing cell survival and in vivo tumor growth. Further mechanistic studies indicated that CERK inhibition affected MMP and cell survival by limiting AKT activation and translocation to mitochondria, and thus, blocking VDAC phosphorylation and tubulin recruitment. IMPLICATIONS Our findings depict how CERK inhibition may serve as a new key point in combination therapeutic strategy for NSCLC, specifically precision therapeutics targeting NSCLC possessing a KRAS mutation.
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Affiliation(s)
- Ngoc T. Vu
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA,Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City, Vietnam
| | - Minjung Kim
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA
| | - Daniel J. Stephenson
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA,Department of Medicine, Division of Hematology & Oncology, University of Virginia, Charlottesville, VA, 22903
| | - H. Patrick MacKnight
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA,Department of Medicine, Division of Hematology & Oncology, University of Virginia, Charlottesville, VA, 22903
| | - Charles E. Chalfant
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA,Department of Medicine, Division of Hematology & Oncology, University of Virginia, Charlottesville, VA, 22903,Department of Cell Biology, University of Virginia, Charlottesville, VA, 22903,Program in Cancer Biology, University of Virginia Cancer Center, Charlottesville, VA, 22903,Research Service, Richmond Veterans Administration Medical Center, Richmond VA, 23298,To whom correspondence should be addressed: Charles E. Chalfant, Professor, Department of Medicine, Division of Hematology & Oncology, P.O. Box 801398, University of Virginia, Charlottesville, VA, 22903, or
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18
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Tanaka A, Honda T, Yasue M, Yamazaki R, Hatakeyama H, Hisaka A, Mashimo M, Kohama T, Nakamura H, Murayama T. Effects of ceramide kinase knockout on lipopolysaccharide-treated sepsis-model mice: Changes in serum cytokine/chemokine levels and increased lethality. J Pharmacol Sci 2022; 150:1-8. [DOI: 10.1016/j.jphs.2022.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 05/19/2022] [Accepted: 05/30/2022] [Indexed: 12/01/2022] Open
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19
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Shin KO, Mihara H, Ishida K, Uchida Y, Park K. Exogenous Ceramide Serves as a Precursor to Endogenous Ceramide Synthesis and as a Modulator of Keratinocyte Differentiation. Cells 2022; 11:cells11111742. [PMID: 35681438 PMCID: PMC9179460 DOI: 10.3390/cells11111742] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/18/2022] [Accepted: 05/18/2022] [Indexed: 12/16/2022] Open
Abstract
Since ceramide is a key epidermal barrier constituent and its deficiency causes barrier-compromised skin, several molecular types of ceramides are formulated in commercial topical agents to improve barrier function. Topical ceramide localizes on the skin surface and in the stratum corneum, but certain amounts of ceramide penetrate the stratum granulosum, becoming precursors to endogenous ceramide synthesis following molecular modification. Moreover, exogenous ceramide as a lipid mediator could modulate keratinocyte proliferation/differentiation. We here investigated the biological roles of exogenous NP (non-hydroxy ceramide containing 4-hydroxy dihydrosphingosine) and NDS (non-hydroxy ceramide containing dihydrosphingosine), both widely used as topical ceramide agents, in differentiated-cultured human keratinocytes. NDS, but not NP, becomes a precursor for diverse ceramide species that are required for a vital permeability barrier. Loricrin (late differentiation marker) production is increased in keratinocytes treated with both NDS and NP vs. control, while bigger increases in involucrin (an early differentiation marker) synthesis were observed in keratinocytes treated with NDS vs. NP and control. NDS increases levels of a key antimicrobial peptide (an innate immune component), cathelicidin antimicrobial peptide (CAMP/LL-37), that is upregulated by a ceramide metabolite, sphingosine-1-phosphate. Our studies demonstrate that NDS could be a multi-potent ceramide species, forming heterogenous ceramide molecules and a lipid mediator to enhance differentiation and innate immunity.
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Affiliation(s)
- Kyong-Oh Shin
- Department of Food Science & Nutrition, Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon 31151, Korea;
- The Korean Institute of Nutrition, Hallym University, Chuncheon 31151, Korea
- LaSS Lipid Institute (LLI), LaSS Inc., Chuncheon 31151, Korea
| | - Hisashi Mihara
- Takasago International Company, Hiratsuka 259-1207, Japan; (H.M.); (K.I.)
| | - Kenya Ishida
- Takasago International Company, Hiratsuka 259-1207, Japan; (H.M.); (K.I.)
| | - Yoshikazu Uchida
- Department of Food Science & Nutrition, Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon 31151, Korea;
- The Korean Institute of Nutrition, Hallym University, Chuncheon 31151, Korea
- Veterans Affairs Medical Center, Department of Dermatology, School of Medicine, Northern California Institute for Research and Education, University of California, San Francisco, CA 94158, USA
- Correspondence: (Y.U.); (K.P.); Tel.: +82-33-248-3146 (Y.U.); +82-33-248-2131 (K.P.)
| | - Kyungho Park
- Department of Food Science & Nutrition, Convergence Program of Material Science for Medicine and Pharmaceutics, Hallym University, Chuncheon 31151, Korea;
- The Korean Institute of Nutrition, Hallym University, Chuncheon 31151, Korea
- Correspondence: (Y.U.); (K.P.); Tel.: +82-33-248-3146 (Y.U.); +82-33-248-2131 (K.P.)
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20
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A simple and rapid method for extraction and measurement of circulating sphingolipids using LC-MS/MS: a targeted lipidomic analysis. Anal Bioanal Chem 2022; 414:2041-2054. [PMID: 35066602 DOI: 10.1007/s00216-021-03853-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/19/2021] [Accepted: 12/14/2021] [Indexed: 01/28/2023]
Abstract
Sphingolipids are a class of lipids with high structural diversity and biological pleiotropy. Mounting evidence supports a role for sphingolipids in regulating pathophysiology of cardiometabolic diseases, and they have been proposed as potential cardiometabolic biomarkers. Current methods for quantifying sphingolipids require laborious pretreatment and relatively large sample volumes, and cover limited species, hindering their application in epidemiological studies. Herein, we applied a time-, labor-, and sample-saving protocol simply using methanol for plasma sphingolipid extraction. It was compared with classical liquid-liquid extraction methods and showed significant advantages in terms of simplicity, sphingolipid coverage, and sample volume. By coupling the protocol with liquid chromatography using a wide-span mobile phase polarity parameter and tandem mass spectrometry operated in dynamic multiple reaction monitoring mode, 37 sphingolipids from 8 classes (sphingoid base, sphingoid base phosphate, ceramide-1-phosphate, lactosylceramide, hexosylceramide, sphingomyelin, ceramide, and dihydroceramide) were quantified within 16 min, using only 10 μL of human plasma. The current method showed good performance in terms of linearity (R2 > 0.99), intra- and interbatch accuracy (70-123%) and precision (RSD < 12%), matrix effect (91-121%), recovery (96-101%), analyte chemical stability (deviation < 19%), and carryover (< 16%). We successfully applied this method to quantify 33 detectable sphingolipids from 579 plasma samples of an epidemiological study within 10 days. The quantified sphingolipid concentrations were comparable with previous studies. Positive associations of ceramide C22:0/C24:0 and their precursors with homeostasis model assessment of insulin resistance suggested that the synthesis of the ceramides might be involved in insulin resistance. This novel method constitutes a simple and rapid approach to quantify circulating sphingolipids for epidemiological studies using targeted lipidomic analysis, which will help elucidate the sphingolipid-regulated pathways underlying cardiometabolic diseases.
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21
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Diesel Particulate Extract Accelerates Premature Skin Aging in Human Fibroblasts via Ceramide-1-Phosphate-Mediated Signaling Pathway. Int J Mol Sci 2022; 23:ijms23052691. [PMID: 35269833 PMCID: PMC8910364 DOI: 10.3390/ijms23052691] [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: 02/08/2022] [Revised: 02/24/2022] [Accepted: 02/24/2022] [Indexed: 02/06/2023] Open
Abstract
Both intrinsic (i.e., an individual’s body clock) and extrinsic factors (i.e., air pollutants and ultraviolet irradiation) accelerate premature aging. Epidemiological studies have shown a correlation between pollutant levels and aging skin symptoms. Diesel particle matter in particular leads to some diseases, including in the skin. Our recent study demonstrates that diesel particulate extract (DPE) increases apoptosis via increases in an anti-mitogenic/pro-apoptotic lipid mediator, ceramide in epidermal keratinocytes. Here, we investigated whether and how DPE accelerates premature skin aging using cultured normal human dermal fibroblasts (HDF). We first demonstrated that DPE increases cell senescence marker β-galactosidase activity in HDF. We then found increases in mRNA and protein levels, along with activity of matrix metalloprotease (MMP)-1 and MMP-3, which are associated with skin aging following DPE exposure. We confirmed increases in collagen degradation in HDF treated with DPE. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (NOX) is activated by DPE and results in increased ceramide production by sphingomyelinase activation in HDF. We identified that ceramide-1-phosphate (C1P) (produced from ceramide by ceramide kinase activation) activates MMP-1 and MMP-3 through activation of arachidonate cascade, followed by STAT 1- and STAT 3-dependent transcriptional activation.
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22
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Gallion LA, Wang Y, Massaro A, Yao M, Petersen BV, Zhang Q, Huang W, Carr AJ, Zhang Q, Allbritton NL. "Fix and Click" for Assay of Sphingolipid Signaling in Single Primary Human Intestinal Epithelial Cells. Anal Chem 2022; 94:1594-1600. [PMID: 35020354 PMCID: PMC8931668 DOI: 10.1021/acs.analchem.1c03503] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Capillary electrophoresis with fluorescence detection (CE-F) is a powerful method to measure enzyme activation in single cells. However, cellular enzymatic assays used in CE-F routinely utilize reporter substrates that possess a bulky fluorophore that may impact enzyme kinetics. To address these challenges, we describe a "fix and click" method utilizing an alkyne-terminated enzyme activation reporter, aldehyde-based fixation, and a click chemistry reaction to attach a fluorophore prior to analysis by single-cell CE-F. The "fix and click" strategy was utilized to investigate sphingolipid signaling in both immortalized cell lines and primary human colonic epithelial cells. When the sphingosine alkyne reporter was loaded into cells, this reporter was metabolized to ceramide (31.6 ± 3.3% peak area) without the production of sphingosine-1-phosphate. In contrast, when the reporter sphingosine fluorescein was introduced into cells, sphingosine fluorescein was converted to sphingosine-1-phosphate and downstream products (32.8 ± 5.7% peak area) without the formation of ceramide. Sphingolipid metabolism was measured in single cells from both differentiated and stem/proliferative human colonic epithelium using "fix and click" paired with CE-F to highlight the diversity of sphingosine metabolism in single cells from primary human colonic epithelium. This novel method will find widespread utility for the performance of single-cell enzyme assays by virtue of its ability to temporally and spatially separate cellular reactions with alkyne-terminated reporters, followed by the assay of enzyme activation at a later time and place.
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Affiliation(s)
- Luke A. Gallion
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina, 27514, United States of America
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, United States of America
| | - Yuli Wang
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, United States of America
| | - Angelo Massaro
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, United States of America
| | - Ming Yao
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, United States of America
| | - Brae V. Petersen
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, United States of America
| | - Quanzheng Zhang
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, Chapel Hill, North Carolina, 27514, United States of America
| | - Weigang Huang
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, Chapel Hill, North Carolina, 27514, United States of America
| | - Adam J. Carr
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, Chapel Hill, North Carolina, 27514, United States of America
| | - Qisheng Zhang
- Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, Chapel Hill, North Carolina, 27514, United States of America
| | - Nancy L. Allbritton
- Department of Bioengineering, University of Washington, Seattle, Washington, 98105, United States of America
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23
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Galor A, Sanchez V, Jensen A, Burton M, Maus K, Stephenson D, Chalfant C, Mandal N. Meibum sphingolipid composition is altered in individuals with meibomian gland dysfunction-a side by side comparison of Meibum and Tear Sphingolipids. Ocul Surf 2022; 23:87-95. [PMID: 34861426 PMCID: PMC8792295 DOI: 10.1016/j.jtos.2021.11.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 01/21/2023]
Abstract
PURPOSE Sphingolipids (SPL) play a role in cell signaling, inflammation, and apoptosis. The purpose of this study was to examine meibum and tear SPL composition in individuals with poor versus good meibum quality. METHODS Individuals were grouped by meibum quality (n = 25 with poor quality, case group and n = 25 with good quality, control group). Meibum and tears were analyzed with liquid chromatography-mass spectrometry (LC-MS) to quantify SPL classes. Semiquantitative and relative composition (mole percent) of SPL and major classes, Ceramide (Cer), Hexosyl-Ceramide (Hex-Cer), Sphingomyelin (SM), Sphingosine (Sph), and sphingosine 1-phosphate (S1P) were compared between groups. RESULTS Demographic characteristics were similar between the two groups. Overall, individuals with poor meibum quality had more SPL pmole in meibum and tears than controls. Relative composition analysis revealed that individuals with poor meibum quality had SPL composed of less Cer, Hex-Cer, and Sph and more SM compared to individuals with good quality meibum. This pattern was not reproduced in tears as individuals with poor meibum quality had SPL composed of a similar amount of Cer, but more Hex-Cer, Sph and SM compared to controls. In meibum, SPL pmole and relative composition most strongly correlated with MG metrics while in tears, SPL pmole and relative composition most strongly correlated with tear production. SPL in both compartments, specifically Cer pmole in meibum and S1P% in tears, correlated with DE symptoms. CONCLUSION SPL composition differs in meibum and tears in patients with poor vs good meibum quality. These findings may be translated into therapeutic targets for disease.
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Affiliation(s)
- Anat Galor
- Miami Veterans Administration Medical Center, 1201 NW 16th St, Miami, FL 33125,Bascom Palmer Eye Institute, University of Miami, 900 NW 17th Street, Miami, FL 33136
| | - Victor Sanchez
- New York University Grossman School of Medicine, New York, NY 10016
| | - Andrew Jensen
- Miami Veterans Administration Medical Center, 1201 NW 16th St, Miami, FL 33125
| | - Madeline Burton
- Department of Ophthalmology, University of Tennessee Health Sciences Center, Hamilton Eye Institute, 930 Madison Avenue, Memphis, TN 38163
| | - Kenneth Maus
- Departments of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL 33620
| | | | - Charles Chalfant
- Departments of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL 33620,The Moffitt Cancer Center, Tampa, FL 33620,Research Service, James A. Haley Veterans Hospital, Tampa, FL 33612
| | - Nawajes Mandal
- Department of Ophthalmology, University of Tennessee Health Sciences Center, Hamilton Eye Institute, 930 Madison Avenue, Memphis, TN 38163,Departments of Anatomy and Neurobiology, and Pharmaceutical Sciences, University of Tennessee Health Sciences Center, 930 Madison Avenue, Memphis, TN 38163,Memphis VA Medical Center, 1030 Jefferson Avenue, Memphis, TN 38104.,Corresponding Author: Nawajes Mandal, PhD, 930 Madison Avenue, Suite 718, Memphis, TN 38163;
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24
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Ali T, Lei X, Barbour SE, Koizumi A, Chalfant CE, Ramanadham S. Alterations in β-Cell Sphingolipid Profile Associated with ER Stress and iPLA 2β: Another Contributor to β-Cell Apoptosis in Type 1 Diabetes. Molecules 2021; 26:molecules26216361. [PMID: 34770770 PMCID: PMC8587436 DOI: 10.3390/molecules26216361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/11/2021] [Accepted: 10/11/2021] [Indexed: 02/06/2023] Open
Abstract
Type 1 diabetes (T1D) development, in part, is due to ER stress-induced β-cell apoptosis. Activation of the Ca2+-independent phospholipase A2 beta (iPLA2β) leads to the generation of pro-inflammatory eicosanoids, which contribute to β-cell death and T1D. ER stress induces iPLA2β-mediated generation of pro-apoptotic ceramides via neutral sphingomyelinase (NSMase). To gain a better understanding of the impact of iPLA2β on sphingolipids (SLs), we characterized their profile in β-cells undergoing ER stress. ESI/MS/MS analyses followed by ANOVA/Student’s t-test were used to assess differences in sphingolipids molecular species in Vector (V) control and iPLA2β-overexpressing (OE) INS-1 and Akita (AK, spontaneous model of ER stress) and WT-littermate (AK-WT) β-cells. As expected, iPLA2β induction was greater in the OE and AK cells in comparison with V and WT cells. We report here that ER stress led to elevations in pro-apoptotic and decreases in pro-survival sphingolipids and that the inactivation of iPLA2β restores the sphingolipid species toward those that promote cell survival. In view of our recent finding that the SL profile in macrophages—the initiators of autoimmune responses leading to T1D—is not significantly altered during T1D development, we posit that the iPLA2β-mediated shift in the β-cell sphingolipid profile is an important contributor to β-cell death associated with T1D.
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Affiliation(s)
- Tomader Ali
- Research Department, Imperial College London Diabetes Center, Abu Dhabi 51133, United Arab Emirates;
| | - Xiaoyong Lei
- Department of Cell, Developmental, and Integrative Biology and Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Suzanne E. Barbour
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA;
| | - Akio Koizumi
- Department of Health and Environmental Sciences, Kyoto Graduate School of Medicine, Kyoto 606-8501, Japan;
| | - Charles E. Chalfant
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL 33620, USA;
| | - Sasanka Ramanadham
- Department of Cell, Developmental, and Integrative Biology and Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
- Correspondence: ; Tel.: +1-205-996-5973; Fax: +1-205-996-5220
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25
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Keppley LJW, Walker SJ, Gademsey AN, Smith JP, Keller SR, Kester M, Fox TE. Nervonic acid limits weight gain in a mouse model of diet-induced obesity. FASEB J 2020; 34:15314-15326. [PMID: 32959931 DOI: 10.1096/fj.202000525r] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 09/03/2020] [Accepted: 09/09/2020] [Indexed: 12/18/2022]
Abstract
Lipid perturbations contribute to detrimental outcomes in obesity. We previously demonstrated that nervonic acid, a C24:1 ω-9 fatty acid, predominantly acylated to sphingolipids, including ceramides, are selectively reduced in a mouse model of obesity. It is currently unknown if deficiency of nervonic acid-sphingolipid metabolites contribute to complications of obesity. Mice were fed a standard diet, a high fat diet, or these diets supplemented isocalorically with nervonic acid. The primary objective was to determine if dietary nervonic acid content alters the metabolic phenotype in mice fed a high fat diet. Furthermore, we investigated if nervonic acid alters markers of impaired fatty acid oxidation in the liver. We observed that a nervonic acid-enriched isocaloric diet reduced weight gain and adiposity in mice fed a high fat diet. The nervonic acid enrichment led to increased C24:1-ceramides and improved several metabolic parameters including blood glucose levels, and insulin and glucose tolerance. Mechanistically, nervonic acid supplementation increased PPARα and PGC1α expression and improved the acylcarnitine profile in liver. These alterations indicate improved energy metabolism through increased β-oxidation of fatty acids. Taken together, increasing dietary nervonic acid improves metabolic parameters in mice fed a high fat diet. Strategies that prevent deficiency of, or restore, nervonic acid may represent an effective strategy to treat obesity and obesity-related complications.
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Affiliation(s)
- Laura J W Keppley
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Susan J Walker
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Alexis N Gademsey
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Jason P Smith
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Susanna R Keller
- Medicine: Endocrinology and Metabolism, University of Virginia, Charlottesville, VA, USA
| | - Mark Kester
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Todd E Fox
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA.,Department of Ophthalmology, University of Virginia, Charlottesville, VA, USA
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26
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Sphingolipid metabolism determines the therapeutic efficacy of nanoliposomal ceramide in acute myeloid leukemia. Blood Adv 2020; 3:2598-2603. [PMID: 31488436 DOI: 10.1182/bloodadvances.2018021295] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 06/13/2019] [Indexed: 11/20/2022] Open
Abstract
Key Points
Distinct sphingolipid metabolism of AML with MDS-related changes defines unique sensitivity to nanoliposomal C6-ceramide. Vinblastine alters sphingolipid metabolism to enhance the sensitivity of AML to nanoliposomal C6-ceramide.
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27
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Nelson AJ, Stephenson DJ, Bone RN, Cardona CL, Park MA, Tusing YG, Lei X, Kokotos G, Graves CL, Mathews CE, Kramer J, Hessner MJ, Chalfant CE, Ramanadham S. Lipid mediators and biomarkers associated with type 1 diabetes development. JCI Insight 2020; 5:138034. [PMID: 32814707 PMCID: PMC7455134 DOI: 10.1172/jci.insight.138034] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 07/09/2020] [Indexed: 01/13/2023] Open
Abstract
Type 1 diabetes (T1D) is a consequence of autoimmune β cell destruction, but the role of lipids in this process is unknown. We previously reported that activation of Ca2+-independent phospholipase A2β (iPLA2β) modulates polarization of macrophages (MΦ). Hydrolysis of the sn-2 substituent of glycerophospholipids by iPLA2β can lead to the generation of oxidized lipids (eicosanoids), pro- and antiinflammatory, which can initiate and amplify immune responses triggering β cell death. As MΦ are early triggers of immune responses in islets, we examined the impact of iPLA2β-derived lipids (iDLs) in spontaneous-T1D prone nonobese diabetic mice (NOD), in the context of MΦ production and plasma abundances of eicosanoids and sphingolipids. We find that (a) MΦNOD exhibit a proinflammatory lipid landscape during the prediabetic phase; (b) early inhibition or genetic reduction of iPLA2β reduces production of select proinflammatory lipids, promotes antiinflammatory MΦ phenotype, and reduces T1D incidence; (c) such lipid changes are reflected in NOD plasma during the prediabetic phase and at T1D onset; and (d) importantly, similar lipid signatures are evidenced in plasma of human subjects at high risk for developing T1D. These findings suggest that iDLs contribute to T1D onset and identify select lipids that could be targeted for therapeutics and, in conjunction with autoantibodies, serve as early biomarkers of pre-T1D.
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Affiliation(s)
- Alexander J Nelson
- Department of Cell, Developmental, and Integrative Biology, and.,Comprehensive Diabetes Center, University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA
| | - Daniel J Stephenson
- Department of Cell Biology, Microbiology and Molecular Biology (CMMB), University of South Florida, Tampa, Florida, USA
| | - Robert N Bone
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Christopher L Cardona
- Department of Cell Biology, Microbiology and Molecular Biology (CMMB), University of South Florida, Tampa, Florida, USA
| | - Margaret A Park
- Department of Cell Biology, Microbiology and Molecular Biology (CMMB), University of South Florida, Tampa, Florida, USA
| | - Ying G Tusing
- Department of Cell, Developmental, and Integrative Biology, and.,Comprehensive Diabetes Center, University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA
| | - Xiaoyong Lei
- Department of Cell, Developmental, and Integrative Biology, and.,Comprehensive Diabetes Center, University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA
| | - George Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, Greece
| | - Christina L Graves
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Clayton E Mathews
- Department of Pathology, Immunology, and Laboratory Medicine, College of Medicine, University of Florida Health Science Center, Gainesville, Florida, USA
| | - Joanna Kramer
- Max McGee Research Center for Juvenile Diabetes, Department of Pediatrics at Medical College of Wisconsin and Children's Research Institute of Children's Hospital of Wisconsin, Milwaukee, Wisconsin, USA
| | - Martin J Hessner
- Max McGee Research Center for Juvenile Diabetes, Department of Pediatrics at Medical College of Wisconsin and Children's Research Institute of Children's Hospital of Wisconsin, Milwaukee, Wisconsin, USA
| | - Charles E Chalfant
- Department of Cell Biology, Microbiology and Molecular Biology (CMMB), University of South Florida, Tampa, Florida, USA.,Research Service, James A. Haley Veterans Hospital, Tampa, Florida, USA
| | - Sasanka Ramanadham
- Department of Cell, Developmental, and Integrative Biology, and.,Comprehensive Diabetes Center, University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA
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28
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Walsh SW, Reep DT, Alam SMK, Washington SL, Al Dulaimi M, Lee SM, Springel EH, Strauss JF, Stephenson DJ, Chalfant CE. Placental Production of Eicosanoids and Sphingolipids in Women Who Developed Preeclampsia on Low-Dose Aspirin. Reprod Sci 2020; 27:2158-2169. [PMID: 32557282 DOI: 10.1007/s43032-020-00234-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 05/19/2020] [Accepted: 06/08/2020] [Indexed: 12/13/2022]
Abstract
Low-dose aspirin, which selectively inhibits thromboxane synthesis, is now standard of care for the prevention of preeclampsia in at risk women, but some women still develop preeclampsia despite an aspirin regimen. To explore the "aspirin failures," we undertook a comprehensive evaluation of placental lipids to determine if abnormalities in non-aspirin sensitive lipids might help explain why some women on low-dose aspirin develop preeclampsia. We studied placentas from women with normal pregnancies and women with preeclampsia. Placental villous explants were cultured and media analyzed by mass spectrometry for aspirin-sensitive and non-aspirin-sensitive lipids. In women who developed severe preeclampsia and delivered preterm, there were significant elevations in non-aspirin-sensitive lipids with biologic actions that could cause preeclampsia. There were significant increases in 15- and 20-hydroxyeicosatetraenoic acids and sphingolipids: D-e-C18:0 ceramide, D-e-C18:0 sphingomyelin, D-e-sphingosine-1-phosphate, and D-e-sphinganine-1-phosphate. With regard to lipids sensitive to aspirin, there was no difference in placental production of thromboxane or prostacyclin, but prostaglandins were lower. There was no difference for isoprostanes, but surprisingly, anti-inflammatory omega 3 and 6 PUFAs were increased. In total, 10 of 30 eicosanoids and 5 of 42 sphingolipids were abnormal in women with severe early onset preeclampsia. Lipid changes in women with mild preeclampsia who delivered at term were of lesser magnitude with few significant differences. The placenta produces many aspirin-sensitive and non-aspirin-sensitive lipids. Abnormalities in eicosanoids and sphingolipids not sensitive to aspirin might explain why some aspirin-treated women develop preeclampsia.
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Affiliation(s)
- Scott W Walsh
- Departments of Obstetrics and Gynecology, Virginia Commonwealth University Medical Center, P.O. Box 980034, Richmond, VA, 23298-0034, USA. .,Physiology and Biophysics, Virginia Commonwealth University, Richmond, VA, 23298, USA.
| | - Daniel T Reep
- Departments of Obstetrics and Gynecology, Virginia Commonwealth University Medical Center, P.O. Box 980034, Richmond, VA, 23298-0034, USA.,Physiology and Biophysics, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - S M Khorshed Alam
- Departments of Obstetrics and Gynecology, Virginia Commonwealth University Medical Center, P.O. Box 980034, Richmond, VA, 23298-0034, USA
| | - Sonya L Washington
- Departments of Obstetrics and Gynecology, Virginia Commonwealth University Medical Center, P.O. Box 980034, Richmond, VA, 23298-0034, USA
| | - Marwah Al Dulaimi
- Departments of Obstetrics and Gynecology, Virginia Commonwealth University Medical Center, P.O. Box 980034, Richmond, VA, 23298-0034, USA
| | - Stephanie M Lee
- Departments of Obstetrics and Gynecology, Virginia Commonwealth University Medical Center, P.O. Box 980034, Richmond, VA, 23298-0034, USA
| | - Edward H Springel
- Departments of Obstetrics and Gynecology, Virginia Commonwealth University Medical Center, P.O. Box 980034, Richmond, VA, 23298-0034, USA
| | - Jerome F Strauss
- Departments of Obstetrics and Gynecology, Virginia Commonwealth University Medical Center, P.O. Box 980034, Richmond, VA, 23298-0034, USA
| | - Daniel J Stephenson
- Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, 23298, USA.,Department of Cell Biology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA
| | - Charles E Chalfant
- Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, 23298, USA.,Department of Cell Biology and Molecular Biology, University of South Florida, Tampa, FL, 33620, USA.,Research Service, James A. Haley Veterans Hospital, Tampa, FL, 33612, USA.,The Moffitt Cancer Center, Tampa, FL, 33620, USA
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Tomizawa S, Tamori M, Tanaka A, Utsumi N, Sato H, Hatakeyama H, Hisaka A, Kohama T, Yamagata K, Honda T, Nakamura H, Murayama T. Inhibitory effects of ceramide kinase on Rac1 activation, lamellipodium formation, cell migration, and metastasis of A549 lung cancer cells. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158675. [PMID: 32112978 DOI: 10.1016/j.bbalip.2020.158675] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 01/30/2020] [Accepted: 02/22/2020] [Indexed: 01/01/2023]
Abstract
Ceramide kinase (CerK) phosphorylates ceramide to ceramide-1-phosphate (C1P), a bioactive sphingolipid. Since the mechanisms responsible for regulating the proliferation and migration/metastasis of cancer cells by the CerK/C1P pathway remain unclear, we conducted the present study. The knockdown of CerK in A549 lung and MCF-7 breast cancer cells (shCerK cells) increased the formation of lamellipodia, which are membrane protrusions coupled with cell migration. Mouse embryonic fibroblasts prepared from CerK-null mice also showed an enhanced formation of lamellipodia. The overexpression of CerK inhibited lamellipodium formation in A549 cells. The knockdown of CerK increased the number of cells having lamellipodia with Rac1 and the levels of active Rac1-GTP form, whereas the overexpression of CerK decreased them. CerK was located in lamellipodia after the epidermal growth factor treatment, indicating that CerK functioned there to inhibit Rac1. The migration of A549 cells was negatively regulated by CerK. An intravenous injection of A549-shCerK cells into nude mice resulted in markedly stronger metastatic responses in the lungs than an injection of control cells. The in vitro growth of A549 cells and in vivo expansion after the injection into mouse flanks were not affected by the CerK knockdown. These results suggest that the activation of CerK/C1P pathway has inhibitory roles on lamellipodium formation, migration, and metastasis of A549 lung cancer cells.
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Affiliation(s)
- Satoshi Tomizawa
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Mizuki Tamori
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Ai Tanaka
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Naoya Utsumi
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hiromi Sato
- Laboratory of Clinical Pharmacology and Pharmacometrics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hiroto Hatakeyama
- Laboratory of Clinical Pharmacology and Pharmacometrics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Akihiro Hisaka
- Laboratory of Clinical Pharmacology and Pharmacometrics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Takafumi Kohama
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan; Research Coordination Group, Research Management Department, Daiichi Sankyo RD Novare Co., Ltd., 1016-13 Kitakasai, Edogawa-ku, Tokyo 134-8630, Japan
| | - Kazuyuki Yamagata
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Takuya Honda
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hiroyuki Nakamura
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan.
| | - Toshihiko Murayama
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
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Amraoui F, Hassani Lahsinoui H, Spijkers LJA, Vogt L, Peters SLM, Wijesinghe DS, Warncke UO, Chalfant CE, Ris-Stalpers C, van den Born BJH, Afink GB. Plasma ceramide is increased and associated with proteinuria in women with pre-eclampsia and HELLP syndrome. Pregnancy Hypertens 2020; 19:100-105. [PMID: 31927322 DOI: 10.1016/j.preghy.2019.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 12/06/2019] [Accepted: 12/15/2019] [Indexed: 01/27/2023]
Abstract
OBJECTIVES Ceramide is a sphingolipid with anti-angiogenic and pro-apoptotic properties that has shown to be increased in plasma of women with pre-eclampsia. We aimed to compare plasma and placental sphingolipid content among normotensive pregnant women and pre-eclamptic women with and without HELLP syndrome and we aimed to assess whether ceramide is related to hypertension and proteinuria in pre-eclampsia. STUDY DESIGN Case-control study. Participants were recruited from the Department of Obstetrics at the Academic Medical Center in Amsterdam, The Netherlands. In total 48 pregnant women were included: 24 with pre-eclampsia and 24 normotensive controls. Of the 24 pre-eclamptic women, 11 had HELLP syndrome. MAIN OUTCOME MEASURES Plasma and placental ceramide content and correlation with blood pressure and protein excretion in pre-eclampsia. RESULTS Total plasma, but not placental, ceramide was higher in pre-eclamptic women with HELLP syndrome (11200 95% CI 9531-12870 nmol/ml, n = 11) compared to pre-eclamptic women without HELLP (7413 95% CI 5928-8898 nmol/ml, n = 13, p < 0.001) and normotensive pregnant women (7404 95% CI 6695-8112 nmol/ml, n = 24, p < 0.001). Maternal circulating ceramide levels were strongly associated with proteinuria (r = 0.621, n = 24, p = 0.001) in pre-eclamptic women and inversely correlated with gestational age at delivery (r = 0.771, p < 0.01) in pre-eclamptic women with HELLP syndrome. Plasma ceramide was not correlated with blood pressure. CONCLUSION Plasma but not placental ceramide content is increased in women with pre-eclampsia and HELLP syndrome. The strong positive correlation with proteinuria and the inverse correlation with gestational age at delivery indicate that excess plasma ceramide may contribute to the pathophysiology of pre-eclampsia and HELLP.
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Affiliation(s)
- Fouad Amraoui
- Department of Vascular Medicine, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Hajar Hassani Lahsinoui
- Department of Obstetrics and Gynaecology, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands; Reproductive Biology Laboratory, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Leon J A Spijkers
- Department of Vascular Medicine, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Liffert Vogt
- Department of Vascular Medicine, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Stephan L M Peters
- Department of Vascular Medicine, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Dayanjan S Wijesinghe
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), USA; Center for Pharmacy Practice Transformation, VCU, Richmond, VA, USA
| | - Urszula O Warncke
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), USA
| | - Charles E Chalfant
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA; Research Service, James A. Haley Veterans Hospital, Tampa, FL 33612, USA
| | - Carrie Ris-Stalpers
- Department of Obstetrics and Gynaecology, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands; Reproductive Biology Laboratory, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Bert-Jan H van den Born
- Department of Vascular Medicine, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Gijs B Afink
- Reproductive Biology Laboratory, Amsterdam UMC, location AMC, University of Amsterdam, Amsterdam, The Netherlands.
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Kumagai K, Hanada K. Structure, functions and regulation of CERT, a lipid-transfer protein for the delivery of ceramide at the ER-Golgi membrane contact sites. FEBS Lett 2019; 593:2366-2377. [PMID: 31254361 DOI: 10.1002/1873-3468.13511] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/26/2019] [Accepted: 06/26/2019] [Indexed: 12/17/2022]
Abstract
The inter-organelle transport of lipids must be regulated to ensure appropriate lipid composition of each organelle. In mammalian cells, ceramide synthesised in the endoplasmic reticulum (ER) is transported to the trans-Golgi regions, where ceramide is converted to sphingomyelin (SM) with the concomitant production of diacylglycerol. Ceramide transport protein (CERT) transports ceramide from the ER to the trans-Golgi regions at the ER-Golgi membrane contact sites (MCS). The function of CERT is down-regulated by multisite phosphorylation of a serine-repeat motif (SRM) and up-regulated by phosphorylation of serine 315 in CERT. Multisite phosphorylation of the SRM is primed by protein kinase D, which is activated by diacylglycerol. The function of CERT is regulated by a phosphorylation-dependent feedback mechanism in response to cellular requirements of SM. CERT-dependent ceramide transport is also affected by the pool of phosphatidylinositol (PtdIns)-4-phosphate (PtdIns(4)P) in the trans-Golgi regions, while the PtdIns(4)P pool is regulated by PtdIns-4-kinases and oxysterol-binding protein. The ER-Golgi MCS may serve as inter-organelle communication zones, in which many factors work in concert to serve as an extensive rheostat of SM, diacylglycerol, cholesterol and PtdIns(4)P.
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Affiliation(s)
- Keigo Kumagai
- Department of Biochemistry and Cell Biology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kentaro Hanada
- Department of Biochemistry and Cell Biology, National Institute of Infectious Diseases, Tokyo, Japan
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Özbalci C, Storck EM, Eggert US. RNAi Transfection Results in Lipidome Changes. Proteomics 2019; 19:e1800298. [PMID: 31099980 PMCID: PMC6617754 DOI: 10.1002/pmic.201800298] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 04/30/2019] [Indexed: 12/21/2022]
Abstract
RNAi experiments are ubiquitously used in cell biology and are achieved by transfection of small interfering RNAs (siRNAs) into cells using a transfection reagent. These results in knock-down of proteins of interest, and the phenotypic consequences are then analyzed. It is reported here that two common RNA interference (RNAi) transfection reagents, DharmaFECT 1 and INTERFERin, in mock transfections using non-targeting siRNAs, cause alterations in the lipidome of HeLa cells. Some lipids change in response to both, presumably chemically different, transfection reagents, while other lipid species change only in response to one of the reagents. While the functional implications of these lipidomic alterations remain to be investigated, the authors' experiments suggest that it is important to use appropriate mock transfection controls during RNAi experiments, ideally complemented by an orthogonal perturbation, especially when investigating membrane-associated phenomena.
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Affiliation(s)
- Cagakan Özbalci
- Randall Centre for Cell and Molecular BiophysicsSchool of Basic and Medical BiosciencesKing's College LondonLondonSE1 1ULUK
| | - Elisabeth M. Storck
- Randall Centre for Cell and Molecular BiophysicsSchool of Basic and Medical BiosciencesKing's College LondonLondonSE1 1ULUK
| | - Ulrike S. Eggert
- Randall Centre for Cell and Molecular BiophysicsSchool of Basic and Medical BiosciencesKing's College LondonLondonSE1 1ULUK
- Department of ChemistryKing's College LondonLondonSE1 1ULUK
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Sidhu R, Mondjinou Y, Qian M, Song H, Kumar AB, Hong X, Hsu FF, Dietzen DJ, Yanjanin NM, Porter FD, Berry-Kravis E, Vite CH, Gelb MH, Schaffer JE, Ory DS, Jiang X. N-acyl- O-phosphocholineserines: structures of a novel class of lipids that are biomarkers for Niemann-Pick C1 disease. J Lipid Res 2019; 60:1410-1424. [PMID: 31201291 DOI: 10.1194/jlr.ra119000157] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 06/13/2019] [Indexed: 01/29/2023] Open
Abstract
Niemann-Pick disease type C1 (NPC1) is a fatal, neurodegenerative, cholesterol storage disorder. With new therapeutics in clinical trials, there is an urgency to improve diagnostics and monitor therapeutic efficacy with biomarkers. In this study, we sought to define the structure of an unknown lipid biomarker for NPC1 with [M + H]+ ion at m/z 509.3351, previously designated as lysoSM-509. The structure of N-palmitoyl-O-phosphocholineserine (PPCS) was proposed for the lipid biomarker based on the results from mass spectrometric analyses and chemical derivatizations. As no commercial standard is available, authentic PPCS was chemically synthesized, and the structure was confirmed by comparison of endogenous and synthetic compounds as well as their derivatives using liquid chromatography-tandem mass spectrometry (LC-MS/MS). PPCS is the most abundant species among N-acyl-O-phosphocholineserines (APCS), a class of lipids that have not been previously detected in biological samples. Further analysis demonstrated that all APCS species with acyl groups ranging from C14 to C24 were elevated in NPC1 plasma. PPCS is also elevated in both central and peripheral tissues of the NPC1 cat model. Identification of APCS structures provide an opportunity for broader exploration of the roles of these novel lipids in NPC1 disease pathology and diagnosis.
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Affiliation(s)
- Rohini Sidhu
- Departments of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Yawo Mondjinou
- Departments of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Mingxing Qian
- Developmental Biology, Washington University School of Medicine, St. Louis, MO 63110
| | - Haowei Song
- Process and Analytical Development, MilliporeSigma, St. Louis, MO 63118
| | - Arun Babu Kumar
- Department of Chemistry, University of Washington, Seattle, WA 98195
| | - Xinying Hong
- Department of Chemistry, University of Washington, Seattle, WA 98195
| | - Fong-Fu Hsu
- Departments of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Dennis J Dietzen
- Pediatrics, Washington University School of Medicine, St. Louis, MO 63110
| | - Nicole M Yanjanin
- Section on Molecular Dysmorphology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892
| | - Forbes D Porter
- Section on Molecular Dysmorphology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892
| | - Elizabeth Berry-Kravis
- Departments of Pediatrics, Neurological Sciences, and Biochemistry, Rush University Medical Center, Chicago, IL 60612
| | - Charles H Vite
- Department of Clinical Studies and Advanced Medicine, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA 70736
| | - Michael H Gelb
- Process and Analytical Development, MilliporeSigma, St. Louis, MO 63118
| | - Jean E Schaffer
- Departments of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Daniel S Ory
- Departments of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Xuntian Jiang
- Departments of Medicine, Washington University School of Medicine, St. Louis, MO 63110
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Wilmott LA, Grambergs RC, Allegood JC, Lyons TJ, Mandal N. Analysis of sphingolipid composition in human vitreous from control and diabetic individuals. J Diabetes Complications 2019; 33:195-201. [PMID: 30630661 PMCID: PMC6368445 DOI: 10.1016/j.jdiacomp.2018.12.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 10/08/2018] [Accepted: 12/07/2018] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Sphingolipids have a fundamental role in many cellular processes, and they have been implicated in insulin resistance and Diabetes Mellitus (DM) and its complications, including diabetic retinopathy (DR). Little is known about how bioactive sphingolipids relate to retinopathies in human DM. In this study, we analyzed the sphingolipid composition of type 2 diabetic (T2DM) and non-diabetic human vitreous samples. METHODS We conducted an observational study on post-mortem human vitreous samples from non-diabetic (Controls; n = 4; age: 71.6 ± 11.0 years, mean ± SD) and type 2 diabetic (T2DM; n = 9; age: 67.0 ± 9.2 years) donors to identify changes in sphingolipid composition. Samples were analyzed by a triple quadrupole mass spectrometer and individual sphingolipid species were identified and quantified using established protocols. RESULTS The total quantity (pmol/mg) of ceramide (Cer), lactosylceramide (Lac-Cer), and sphingomyelin (SM) were increased in type 2 diabetic vitreous samples. Among individual species, we found a general trend of increase in the longer chain species of ceramides, hexosylceramides (Hex-Cer), Lac-Cer, and SM. CONCLUSIONS This study shows the presence of measurable levels of sphingolipids in human vitreous. The results indicate changes in sphingolipid composition in the vitreous due to type 2 diabetes, which could be connected to the disease pathologies of the retina, retinal vessels, vitreous and the surrounding tissues.
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Affiliation(s)
- Lynda A Wilmott
- The University of Tennessee Health Science Center, Department of Ophthalmology, Memphis, TN 38163, USA
| | - Richard C Grambergs
- The University of Tennessee Health Science Center, Department of Ophthalmology, Memphis, TN 38163, USA
| | - Jeremy C Allegood
- Virginia Commonwealth University School of Medicine, Lipidomics Core, Department of Biochemistry and Molecular Biology, Richmond, VA 23298, USA
| | - Timothy J Lyons
- Medical University of South Carolina, Division of Endocrinology, Diabetes & Medical Genetics, Charleston, SC 29425, USA
| | - Nawajes Mandal
- The University of Tennessee Health Science Center, Department of Ophthalmology, Memphis, TN 38163, USA; The University of Tennessee Health Science Center, Department of Anatomy and Neurobiology, Memphis, TN 38163, USA; The University of Oklahoma Health Science Center, Department of Ophthalmology, Oklahoma City, OK 73104, USA.
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Mishra SK, Stephenson DJ, Chalfant CE, Brown RE. Upregulation of human glycolipid transfer protein (GLTP) induces necroptosis in colon carcinoma cells. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:158-167. [PMID: 30472325 PMCID: PMC6448591 DOI: 10.1016/j.bbalip.2018.11.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 11/03/2018] [Accepted: 11/10/2018] [Indexed: 02/06/2023]
Abstract
Human GLTP on chromosome 12 (locus 12q24.11) encodes a 24 kD amphitropic lipid transfer protein (GLTP) that mediates glycosphingolipid (GSL) intermembrane trafficking and regulates GSL homeostatic levels within cells. Herein, we provide evidence that GLTP overexpression inhibits the growth of human colon carcinoma cells (HT-29; HCT-116), but spares normal colonic cells (CCD-18Co). Mechanistic studies reveal that GLTP overexpression arrested the cell cycle at the G1/S checkpoint via upregulation of cyclin-dependent kinase inhibitor-1B (Kip1/p27) and cyclin-dependent kinase inhibitor 1A (Cip1/p21) at the protein and mRNA levels, and downregulation of cyclin-dependent kinase-2 (CDK2), cyclin-dependent kinase-4 (CDK4), cyclin E and cyclin D1 protein levels. Assessment of the biological fate of HCT-116 cells overexpressing GLTP indicated no increase in cell death suggesting induction of quiescence. However, HT-29 cells overexpressing GLTP underwent cell death by necroptosis as revealed by phosphorylation of human mixed lineage kinase domain-like protein (pMLKL) via receptor-interacting protein kinase-3 (RIPK-3), elevated cytosolic calcium, and plasma membrane permeabilization by pMLKL oligomerization. Overexpression of W96A-GLTP, an ablated GSL binding site mutant, failed to arrest the cell cycle or induce necroptosis. Sphingolipid assessment (ceramide, monohexosylceramide, sphingomyelin, ceramide-1-phosphate, sphingosine, and sphingosine-1-phosphate) of HT-29 cells overexpressing GLTP revealed large decreases (>5-fold) in sphingosine-1-phosphate with minimal change in 16:0-ceramide, tipping the 'sphingolipid rheostat' (S1P/16:0-Cer ratio) towards cell death. Depletion of RIPK-3 or MLKL abrogated necroptosis induced by GLTP overexpression. Our findings establish GLTP upregulation as a previously unknown suppressor of human colon carcinoma HT-29 cells via interference with cell cycle progression and induction of necroptosis.
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Affiliation(s)
| | - Daniel J Stephenson
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University Medical Center, Richmond, VA 23298-0614, USA; Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL 33620, USA
| | - Charles E Chalfant
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL 33620, USA; Research Service, James A. Haley Veterans Hospital, Tampa, FL 33612, USA; The Moffitt Cancer Center, Tampa, FL 33620, USA
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The Role of Ceramide 1-Phosphate in Inflammation, Cellular Proliferation, and Wound Healing. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1159:65-77. [DOI: 10.1007/978-3-030-21162-2_5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Paranjpe V, Tan J, Nguyen J, Lee J, Allegood J, Galor A, Mandal N. Clinical signs of meibomian gland dysfunction (MGD) are associated with changes in meibum sphingolipid composition. Ocul Surf 2018; 17:318-326. [PMID: 30553001 DOI: 10.1016/j.jtos.2018.12.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 10/26/2018] [Accepted: 12/11/2018] [Indexed: 12/16/2022]
Abstract
PURPOSE Sphingolipids (SPL) play roles in cell signaling, inflammation, and apoptosis. Changes in SPL composition have been reported in individuals with MGD, but associations between clinical signs of MGD and compositional changes in meibum SPLs have not been examined. METHODS Forty-three individuals underwent a tear film assessment. Groups were split into those with good or poor quality meibum. Meibum was collected then analyzed with liquid chromatography-mass spectroscopy to quantify SPL classes. Relative composition of SPL and major classes, Ceramide (Cer), Hexosyl-Ceramide (Hex-Cer), Sphingomyelin (SM), Sphingosine (Sph) and Sphingosine 1-phosphate (S1P) was calculated via mole percent. RESULTS 22 and 21 individuals were characterized with good and poor quality meibum, respectively. Individuals with poor quality were older (60 ± 8 vs 51 ± 16 years) and more likely to be male (90% vs 64%). Relative composition analysis revealed that individuals with poor meibum quality had SPL composed of less Cer (33.36% vs 49.49%, p < 0.01), Hex-Cer (4.88% vs 9.15%, p < 0.01), and S1P (0.16% vs 0.31%, p = 0.05), and more SM (58.67% vs 38.18%, p < 0.01) and Sph (2.92% vs 2.87%, p = 0.97) compared to individuals with good quality meibum. Assessment of the ratio of Cer (pro-apoptotic) to S1P (pro-survival) showed that individuals with poor meibum quality had a relative increase in Cer (495.23 vs 282.69, p = 0.07). CONCLUSION Meibum quality, a clinically graded marker of MGD, is associated with compositional changes in meibum sphingolipids. Further investigation of the structural and bioactive roles of sphingolipids in MGD may provide future targets for therapy.
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Affiliation(s)
- Vikram Paranjpe
- Miami Veterans Administration Medical Center, 1201 NW 16th St, Miami, FL, 33125, USA; Bascom Palmer Eye Institute, University of Miami, 900 NW 17th Street, Miami, FL, 33136, USA
| | - Jeremy Tan
- Ophthalmic Surgeons and Consultants of Ohio, Ohio State University, Columbus, OH, 43203, USA
| | - Jason Nguyen
- West Virginia University Eye, Morgantown, WV, 26506, USA
| | - John Lee
- Miami Veterans Administration Medical Center, 1201 NW 16th St, Miami, FL, 33125, USA; Bascom Palmer Eye Institute, University of Miami, 900 NW 17th Street, Miami, FL, 33136, USA
| | - Jeremy Allegood
- Lipidomics Core, Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23249, USA
| | - Anat Galor
- Miami Veterans Administration Medical Center, 1201 NW 16th St, Miami, FL, 33125, USA; Bascom Palmer Eye Institute, University of Miami, 900 NW 17th Street, Miami, FL, 33136, USA.
| | - Nawajes Mandal
- Department of Ophthalmology, Anatomy and Neurobiology, University of Tennessee Health Sciences Center, Hamilton Eye Institute, 930 Madison Avenue, Memphis, TN, 38163, USA.
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Sugano E, Edwards G, Saha S, Wilmott LA, Grambergs RC, Mondal K, Qi H, Stiles M, Tomita H, Mandal N. Overexpression of acid ceramidase (ASAH1) protects retinal cells (ARPE19) from oxidative stress. J Lipid Res 2018; 60:30-43. [PMID: 30413652 DOI: 10.1194/jlr.m082198] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 10/26/2018] [Indexed: 01/08/2023] Open
Abstract
Over 11 million people in the United States alone have some form of age-related macular degeneration (AMD). Oxidative stress, cell death, and the degeneration of retinal pigment epithelial (RPE) cells contribute to AMD pathology. Recent evidence suggests that ceramide (Cer), a cellular sphingolipid mediator that acts as a second messenger to induce apoptosis, might play a role in RPE cell death. The lysosomal breakdown of Cer by acid ceramidase [N-acylsphingosine amidohydrolase (ASAH)1] into sphingosine (Sph) is the major source for Sph 1-phosphate production, which has an opposing role to Cer and provides cytoprotection. Here, we investigated the role of Cer in human RPE-derived ARPE19 cells under hydrogen peroxide-induced oxidative stress, and show that Cer and hexosyl-Cer levels increase in the oxidatively stressed ARPE19 cells, which can be prevented by overexpression of lysosomal ASAH1. This study demonstrates that oxidative stress generates sphingolipid death mediators in retinal cells and that induction of ASAH1 could rescue retinal cells from oxidative stress by hydrolyzing excess Cers.
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Affiliation(s)
- Eriko Sugano
- Division of Science and Engineering, Iwate University, Morioka 020-8551, Japan
| | - Genea Edwards
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Saikat Saha
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Lynda A Wilmott
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Richard C Grambergs
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Koushik Mondal
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163
| | - Hui Qi
- Department of Ophthalmology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104
| | - Megan Stiles
- Department of Ophthalmology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104
| | - Hiroshi Tomita
- Division of Science and Engineering, Iwate University, Morioka 020-8551, Japan
| | - Nawajes Mandal
- Departments of Ophthalmology University of Tennessee Health Science Center, Memphis, TN 38163 .,Department of Ophthalmology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104.,Anatomy and Neurobiology, University of Tennessee Health Science Center, Memphis, TN 38163
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Regulation of adipogenesis by ceramide 1-phosphate. Exp Cell Res 2018; 372:150-157. [DOI: 10.1016/j.yexcr.2018.09.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 09/24/2018] [Accepted: 09/26/2018] [Indexed: 11/27/2022]
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Karandashova S, Kummarapurugu A, Zheng S, Kang L, Sun S, Rubin BK, Voynow JA. Neutrophil elastase correlates with increased sphingolipid content in cystic fibrosis sputum. Pediatr Pulmonol 2018; 53:872-880. [PMID: 29624923 PMCID: PMC6566867 DOI: 10.1002/ppul.24001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 03/07/2018] [Indexed: 12/31/2022]
Abstract
INTRODUCTION Sphingolipids are associated with the regulation of pulmonary inflammation. Although sphingolipids have been investigated in the context of cystic fibrosis (CF), the focus has been on loss of CF transmembrane conductance regulator (CFTR) function in mice, and in CF human lung epithelial cell lines. The sphingolipid content of CF sputum and the potential link between ceramide and airway inflammation in CF remain relatively unexplored. METHODS Fifteen patients with CF provided two spontaneously expectorated sputum samples, one collected during a hospitalization for an acute pulmonary exacerbation and one from an outpatient visit at a time of clinical stability. Sputum was processed, and the supernatant assessed for active neutrophil elastase (NE) using a chromogenic microplate assay and sphingolipid content using reverse phase high-performance liquid chromatography/electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS). Relevant demographic data including age, sex, CF genotype, FEV1 % predicted, and sputum bacteriology were assessed as possible modifying factors that could influence the correlation between NE and sputum sphingolipids. Data were analyzed for linear correlation, with statistical significance pre-defined as P < 0.05. RESULTS There was a significant association between the concentration of active NE and ceramide, sphingomyelin, and monohexosylceramide moieties as well as sphingosine-1-phosphate. The presence of Methicillin-resistant Staphylococcus aureus (MRSA), FEV1 % predicted, and female gender further strengthened the association of NE and sphingolipids, but Pseudomonas aeruginosa had no effect on the association between NE and sphingolipids. CONCLUSIONS These data suggest that NE may increase pro-inflammatory sphingolipid signaling, and the association is strengthened in female patients and patients with MRSA.
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Affiliation(s)
- Sophia Karandashova
- Center for Clinical and Translational Research at Virginia Commonwealth University (VCU), Richmond, Virginia
| | - Apparao Kummarapurugu
- Division of Pediatric Pulmonology, Children's Hospital of Richmond at VCU, Richmond, Virginia
| | - Shuo Zheng
- Division of Pediatric Pulmonology, Children's Hospital of Richmond at VCU, Richmond, Virginia
| | - Le Kang
- Department of Biostatistics, VCU, Richmond, Virginia
| | - Shumei Sun
- Department of Biostatistics, VCU, Richmond, Virginia
| | - Bruce K Rubin
- Division of Pediatric Pulmonology, Children's Hospital of Richmond at VCU, Richmond, Virginia
| | - Judith A Voynow
- Division of Pediatric Pulmonology, Children's Hospital of Richmond at VCU, Richmond, Virginia
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Moro K, Kawaguchi T, Tsuchida J, Gabriel E, Qi Q, Yan L, Wakai T, Takabe K, Nagahashi M. Ceramide species are elevated in human breast cancer and are associated with less aggressiveness. Oncotarget 2018; 9:19874-19890. [PMID: 29731990 PMCID: PMC5929433 DOI: 10.18632/oncotarget.24903] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Accepted: 03/12/2018] [Indexed: 01/19/2023] Open
Abstract
Sphingolipids have emerged as key regulatory molecules in cancer cell survival and death. Although important roles of sphingolipids in breast cancer progression have been reported in experimental models, their roles in human patients are yet to be revealed. The aim of this study was to investigate the ceramide levels and its biosynthesis pathways in human breast cancer patients. Breast cancer, peri-tumor and normal breast tissue samples were collected from surgical specimens from a series of 44 patients with breast cancer. The amount of sphingolipid metabolites in the tissue were determined by mass spectrometry. The Cancer Genome Atlas was used to analyze gene expression related to the sphingolipid metabolism. Ceramide levels were higher in breast cancer tissue compared to both normal and peri-tumor breast tissue. Substrates and enzymes that generate ceramide were significantly increased in all three ceramide biosynthesis pathways in cancer. Further, higher levels of ceramide in breast cancer were associated with less aggressive cancer biology presented by Ki-67 index and nuclear grade of the cancer. Interestingly, patients with higher gene expressions of enzymes in the three major ceramide synthesis pathways showed significantly worse prognosis. This is the first study to reveal the clinical relevance of ceramide metabolism in breast cancer patients. We demonstrated that ceramide levels in breast cancer tissue were significantly higher than those in normal tissue, with activation of the three ceramide biosynthesis pathways. We also identified that ceramide levels have a significant association with aggressive phenotype and its enzymes have prognostic impact on breast cancer patients.
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Affiliation(s)
- Kazuki Moro
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata City 951-8510, Japan
| | - Tsutomu Kawaguchi
- Breast Surgery, Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York 14263, USA
| | - Junko Tsuchida
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata City 951-8510, Japan
| | - Emmanuel Gabriel
- Breast Surgery, Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York 14263, USA
| | - Qianya Qi
- Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, New York 14263, USA
| | - Li Yan
- Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, New York 14263, USA
| | - Toshifumi Wakai
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata City 951-8510, Japan
| | - Kazuaki Takabe
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata City 951-8510, Japan.,Breast Surgery, Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, New York 14263, USA.,Department of Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, The State University of New York, Buffalo, New York 14203, USA.,Department of Breast Surgery and Oncology, Tokyo Medical University, Tokyo 160-8402, Japan.,Department of Surgery, Yokohama City University, Yokohama 236-0004, Japan
| | - Masayuki Nagahashi
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata City 951-8510, Japan
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Abstract
This review provides an overview on components of the sphingolipid superfamily, on their localization and metabolism. Information about the sphingolipid biological activity in cell physiopathology is given. Recent studies highlight the role of sphingolipids in inflammatory process. We summarize the emerging data that support the different roles of the sphingolipid members in specific phases of inflammation: (1) migration of immune cells, (2) recognition of exogenous agents, and (3) activation/differentiation of immune cells.
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Starkweather A, Julian T, Ramesh D, Heineman A, Sturgill J, Dorsey SG, Lyon DE, Wijesinghe DS. Circulating Lipids and Acute Pain Sensitization: An Exploratory Analysis. Nurs Res 2017; 66:454-461. [PMID: 29095376 PMCID: PMC5679413 DOI: 10.1097/nnr.0000000000000248] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND In individuals with low back pain, higher lipid levels have been documented and were associated with increased risk for chronic low back pain. OBJECTIVES The purpose of this research was to identify plasma lipids that discriminate participants with acute low back pain with or without pain sensitization as measured by quantitative sensory testing. METHODS This exploratory study was conducted as part of a larger parent randomized controlled trial. A cluster analysis of 30 participants with acute low back pain revealed two clusters: one with signs of peripheral and central sensitivity to mechanical and thermal stimuli and the other with an absence of peripheral and central sensitivity. Lipid levels were extracted from plasma and measured using mass spectroscopy. RESULTS Triacylglycerol 50:2 was significantly higher in participants with peripheral and central sensitization compared to the nonsensitized cluster. The nonsensitized cluster had significantly higher levels of phosphoglyceride 34:2, plasmenyl phosphocholine 38:1, and phosphatidic acid 28:1 compared to participants with peripheral and central sensitization. Linear discriminant function analysis was conducted using the four statistically significant lipids to test their predictive power to classify those in the sensitization and no-sensitization clusters; the four lipids accurately predicted cluster classification 58% of the time (R = .58, -2 log likelihood = 14.59). DISCUSSION The results of this exploratory study suggest a unique lipidomic signature in plasma of patients with acute low back pain based on the presence or absence of pain sensitization. Future work to replicate these preliminary findings is underway.
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Affiliation(s)
- Angela Starkweather
- Angela Starkweather, PhD, RN, FAAN, is Professor; Thomas Julian, BSN, RN, is Research Assistant; and Divya Ramesh, PhD, is Project Director, University of Connecticut School of Nursing, Storrs. Amy Heineman, BSN, RN, is Research Coordinator, Virginia Commonwealth University School of Nursing, Richmond. Jamie Sturgill, PhD, is Assistant Professor, University of Kentucky School of Medicine, Lexington. Susan G. Dorsey, PhD, RN, FAAN, is Professor and Chair, University of Maryland, Baltimore, School of Nursing. Debra E. Lyon, PhD, RN, FAAN, is Professor and Executive Associate Dean, University of Florida College of Nursing, Gainesville. Dayanjan Shanaka Wijesinghe, PhD, is Assistant Professor, Virginia Commonwealth University School of Pharmacy, Richmond
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Karandashova S, Kummarapurugu AB, Zheng S, Chalfant CE, Voynow JA. Neutrophil elastase increases airway ceramide levels via upregulation of serine palmitoyltransferase. Am J Physiol Lung Cell Mol Physiol 2017; 314:L206-L214. [PMID: 29025713 DOI: 10.1152/ajplung.00322.2017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Altered sphingolipid metabolism is associated with increased inflammation; however, the impact of inflammatory mediators, including neutrophil elastase (NE), on airway sphingolipid homeostasis remains unknown. Using a well-characterized mouse model of NE oropharyngeal aspiration, we investigated a potential link between NE-induced airway inflammation and increased synthesis of various classes of sphingolipids, including ceramide species. Sphingolipids in bronchoalveolar lavage fluids (BAL) were identified and quantified using reverse-phase high-performance liquid chromatography/electrospray ionization tandem mass spectrometry analysis. BAL total and differential cell counts, CXCL1/keratinocyte chemoattractant (KC) protein levels, and high-mobility group box 1 (HMGB1) protein levels were determined. NE exposure increased BAL long-chain ceramides, total cell and neutrophil counts, and upregulated KC and HMGB1. The mRNA and protein levels of serine palmitoyltransferase (SPT) long-chain subunits 1 and 2, the multimeric enzyme responsible for the first, rate-limiting step of de novo ceramide generation, were determined by qRT-PCR and Western analyses, respectively. NE increased lung SPT long-chain subunit 2 (SPTLC2) protein levels but not SPTLC1 and had no effect on mRNA for either subunit. To assess whether de novo ceramide synthesis was required for NE-induced inflammation, myriocin, a SPT inhibitor, or a vehicle control was administered intraperitoneally 2 h before NE administration. Myriocin decreased BAL d18:1/22:0 and d18:1/24:1 ceramide, KC, and HMGB1 induced by NE exposure. These results support a feed-forward cycle of NE-generated ceramide and ceramide-driven cytokine signaling that may be a potential target for intervention in lung disease typified by chronic neutrophilic inflammation.
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Affiliation(s)
- Sophia Karandashova
- Center for Clinical and Translational Research, Virginia Commonwealth University , Richmond, Virginia
| | - Apparao B Kummarapurugu
- Division of Pediatric Pulmonary Medicine, Children's Hospital of Richmond at Virginia Commonwealth University , Richmond, Virginia
| | - Shuo Zheng
- Division of Pediatric Pulmonary Medicine, Children's Hospital of Richmond at Virginia Commonwealth University , Richmond, Virginia
| | - Charles E Chalfant
- Dept. of Biochemistry and Molecular Biology, Institute of Molecular Medicine, Johnson Center for Critical Care and Pulmonary Research, and Massey Cancer Center, Virginia Commonwealth University , Richmond, Virginia.,Research Service, Hunter Holmes McGuire Veterans Administration Medical Center , Richmond, Virginia
| | - Judith A Voynow
- Division of Pediatric Pulmonary Medicine, Children's Hospital of Richmond at Virginia Commonwealth University , Richmond, Virginia
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Qi H, Priyadarsini S, Nicholas SE, Sarker-Nag A, Allegood J, Chalfant CE, Mandal NA, Karamichos D. Analysis of sphingolipids in human corneal fibroblasts from normal and keratoconus patients. J Lipid Res 2017; 58:636-648. [PMID: 28188148 DOI: 10.1194/jlr.m067264] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 02/08/2017] [Indexed: 12/31/2022] Open
Abstract
The pathophysiology of human keratoconus (KC), a bilateral progressive corneal disease leading to protrusion of the cornea, stromal thinning, and scarring, is not well-understood. In this study, we investigated a novel sphingolipid (SPL) signaling pathway through which KC may be regulated. Using human corneal fibroblasts (HCFs) and human KC cells (HKCs), we examined the SPL pathway modulation. Both cell types were stimulated by the three transforming growth factor (TGF)-β isoforms: TGF-β1 (T1), TGF-β2 (T2), and TGF-β3 (T3). All samples were analyzed using lipidomics and real-time PCR. Our data showed that HKCs have increased levels of signaling SPLs, ceramide (Cer), and sphingosine 1-phosphate (S1P). Treatment with T1 reversed the increase in Cer in HKCs and treatment with T3 reversed the increase in S1P. S1P3 receptor mRNA levels were also significantly upregulated in HKCs, but were reduced to normal levels following T3 treatment. Furthermore, stimulation with Cer and S1P led to significant upregulation of fibrotic markers in HCFs, but not in HKCs. Additionally, stimulation with a Cer synthesis inhibitor (FTY720) led to significant downregulation of specific fibrotic markers in HKCs (TGF-β1, collagen type III, and α smooth muscle actin) without an effect on healthy HCFs, suggesting a causative role of Cer and S1P in fibrogenesis. Overall, this study suggests an association of the SPL signaling pathway in KC disease and its relation with the TGF-β pathway.
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Affiliation(s)
- Hui Qi
- Departments of Ophthalmology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104; Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Shrestha Priyadarsini
- Departments of Ophthalmology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104; Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Sarah E Nicholas
- Departments of Ophthalmology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104; Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Akhee Sarker-Nag
- Departments of Ophthalmology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104; Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Jeremy Allegood
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23249
| | - Charles E Chalfant
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA 23249; Research and Development, Hunter Holmes McGuire Veterans Administration Medical Center, Richmond, VA 23249 and VCU Massey Cancer Center, VCU Institute of Molecular Medicine, and VCU Johnson Center, Virginia Commonwealth University, Richmond, VA 23298
| | - Nawajes A Mandal
- Departments of Ophthalmology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104; Dean McGee Eye Institute, Oklahoma City, OK 73104; Physiology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104; Cell Biology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104.
| | - Dimitrios Karamichos
- Departments of Ophthalmology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104; Dean McGee Eye Institute, Oklahoma City, OK 73104; Physiology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104; Cell Biology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK 73104.
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Mohammed BM, Sanford KW, Fisher BJ, Martin EJ, Contaifer Jr D, Warncke UO, Wijesinghe DS, Chalfant CE, Brophy DF, Fowler III AA, Natarajan R. Impact of high dose vitamin C on platelet function. World J Crit Care Med 2017; 6:37-47. [PMID: 28224106 PMCID: PMC5295168 DOI: 10.5492/wjccm.v6.i1.37] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/15/2016] [Accepted: 11/02/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To examine the effect of high doses of vitamin C (VitC) on ex vivo human platelets (PLTs).
METHODS Platelet concentrates collected for therapeutic or prophylactic transfusions were exposed to: (1) normal saline (control); (2) 0.3 mmol/L VitC (Lo VitC); or (3) 3 mmol/L VitC (Hi VitC, final concentrations) and stored appropriately. The VitC additive was preservative-free buffered ascorbic acid in water, pH 5.5 to 7.0, adjusted with sodium bicarbonate and sodium hydroxide. The doses of VitC used here correspond to plasma VitC levels reported in recently completed clinical trials. Prior to supplementation, a baseline sample was collected for analysis. PLTs were sampled again on days 2, 5 and 8 and assayed for changes in PLT function by: Thromboelastography (TEG), for changes in viscoelastic properties; aggregometry, for PLT aggregation and adenosine triphosphate (ATP) secretion in response to collagen or adenosine diphosphate (ADP); and flow cytometry, for changes in expression of CD-31, CD41a, CD62p and CD63. In addition, PLT intracellular VitC content was measured using a fluorimetric assay for ascorbic acid and PLT poor plasma was used for plasma coagulation tests [prothrombin time (PT), partial thrombplastin time (PTT), functional fibrinogen] and Lipidomics analysis (UPLC ESI-MS/MS).
RESULTS VitC supplementation significantly increased PLTs intracellular ascorbic acid levels from 1.2 mmol/L at baseline to 3.2 mmol/L (Lo VitC) and 15.7 mmol/L (Hi VitC, P < 0.05). VitC supplementation did not significantly change PT and PTT values, or functional fibrinogen levels over the 8 d exposure period (P > 0.05). PLT function assayed by TEG, aggregometry and flow cytometry was not significantly altered by Lo or Hi VitC for up to 5 d. However, PLTs exposed to 3 mmol/L VitC for 8 d demonstrated significantly increased R and K times by TEG and a decrease in the α-angle (P < 0.05). There was also a fall of 20 mm in maximum amplitude associated with the Hi VitC compared to both baseline and day 8 saline controls. Platelet aggregation studies, showed uniform declines in collagen and ADP-induced platelet aggregations over the 8-d study period in all three groups (P > 0.05). Collagen and ADP-induced ATP secretion was also not different between the three groups (P > 0.05). Finally, VitC at the higher dose (3 mmol/L) also induced the release of several eicosanoids including thromboxane B2 and prostaglandin E2, as well as products of arachidonic acid metabolism via the lipoxygenases pathway such as 11-/12-/15-hydroxyicosatetraenoic acid (P < 0.05).
CONCLUSION Alterations in PLT function by exposure to 3 mmol/L VitC for 8 d suggest that caution should be exerted with prolonged use of intravenous high dose VitC.
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Contaifer D, Carl DE, Warncke UO, Martin EJ, Mohammed BM, Van Tassell B, Brophy DF, Chalfant CE, Wijesinghe DS. Unsupervised analysis of combined lipid and coagulation data reveals coagulopathy subtypes among dialysis patients. J Lipid Res 2016; 58:586-599. [PMID: 27993949 DOI: 10.1194/jlr.p068833] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 12/01/2016] [Indexed: 01/22/2023] Open
Abstract
Hemodialysis (HD) and peritoneal dialysis (PD) are the primary means of managing end stage renal disease (ESRD). However, these treatment modalities are associated with the onset of coagulation abnormalities. Effective management of coagulation risk among these patients requires the identification of surrogate markers that provide an early indication of the coagulation abnormalities. The role of sphingolipids in the manifestation and prediction of coagulation abnormalities among dialysis patients have never been investigated. Herein, we report the first instance of an in depth investigation into the sphingolipid changes among ESRD patients undergoing HD and PD. The results reveal distinct differences in terms of perturbations to specific sphingolipid biosynthetic pathways that are highly dependent on the treatment modality. Our studies also demonstrated strong correlation between specific sphingolipids and coagulation parameters, such as HexCer(d18:1/26:0) and maximal amplitude (MA), SM(d18:1/24:1) and tissue factor pathway inhibitor, and sphingosine 1-phosphate d18:1 and FX (Spearman ρ of 0.93, 0.89, and -0.89, respectively). Furthermore, our study revealed the potential for using HexCer(d18:1/22:0), HexCer(d18:1/24:0), and HexCer(d18:1/26:0) (r2 = 0.71, 0.82, and 0.63, respectively) and coagulation parameter MA (r2 = 0.7) for successful diagnosis of differential coagulopathies among ESRD patients undergoing HD, providing an opportunity toward personalized disease management.
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Affiliation(s)
- Daniel Contaifer
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), Richmond, VA
| | - Daniel E Carl
- Departments of Internal Medicine, Virginia Commonwealth University (VCU), Richmond, VA
| | - Urszula Osinska Warncke
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), Richmond, VA
| | - Erika J Martin
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), Richmond, VA
| | - Bassem M Mohammed
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), Richmond, VA
| | - Benjamin Van Tassell
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), Richmond, VA
| | - Donald F Brophy
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), Richmond, VA
| | - Charles E Chalfant
- Biochemistry and Molecular Biology, Virginia Commonwealth University (VCU), Richmond, VA .,Hunter Holmes McGuire Veterans Administration Medical Center, VCU Johnson Center for Critical Care Research, VCU Massey Cancer Center, and VCU Institute of Molecular Medicine, Richmond, VA
| | - Dayanjan S Wijesinghe
- Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University (VCU), Richmond, VA .,Surgery, Virginia Commonwealth University (VCU), Richmond, VA
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Stiles M, Qi H, Sun E, Tan J, Porter H, Allegood J, Chalfant CE, Yasumura D, Matthes MT, LaVail MM, Mandal NA. Sphingolipid profile alters in retinal dystrophic P23H-1 rats and systemic FTY720 can delay retinal degeneration. J Lipid Res 2016; 57:818-31. [PMID: 26947037 DOI: 10.1194/jlr.m063719] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Indexed: 12/28/2022] Open
Abstract
Retinal degeneration (RD) affects millions of people and is a major cause of ocular impairment and blindness. With a wide range of mutations and conditions leading to degeneration, targeting downstream processes is necessary for developing effective treatments. Ceramide and sphingosine-1-phosphate, a pair of bioactive sphingolipids, are involved in apoptosis and its prevention, respectively. Apoptotic cell death is a potential driver of RD, and in order to understand the mechanism of degeneration and potential treatments, we studied rhodopsin mutant RD model, P23H-1 rats. Investigating this genetic model of human RD allows us to investigate the association of sphingolipid metabolites with the degeneration of the retina in P23H-1 rats and the effects of a specific modulator of sphingolipid metabolism, FTY720. We found that P23H-1 rat retinas had altered sphingolipid profiles that, when treated with FTY720, were rebalanced closer to normal levels. FTY720-treated rats also showed protection from RD compared with their vehicle-treated littermates. Based on these data, we conclude that sphingolipid dysregulation plays a secondary role in retinal cell death, which may be common to many forms of RDs, and that the U.S. Food and Drug Administration-approved drug FTY720 or related compounds that modulate sphingolipid metabolism could potentially delay the cell death.
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Affiliation(s)
- Megan Stiles
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Hui Qi
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Eleanor Sun
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Jeremy Tan
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Hunter Porter
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 Dean McGee Eye Institute, Oklahoma City, OK 73104
| | - Jeremy Allegood
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA 23298
| | - Charles E Chalfant
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA 23298 Research and Development, Hunter Holmes McGuire Veterans Administration Medical Center, Richmond, VA 23249 Virginia Commonwealth University School of Medicine, Virginia Commonwealth University Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298 Virginia Commonwealth University Institute of Molecular Medicine and the Virginia Commonwealth University Johnson Center, Virginia Commonwealth University, Richmond, VA 23298
| | - Douglas Yasumura
- Beckman Vision Center, University of California, San Francisco School of Medicine, San Francisco, CA 94143
| | - Michael T Matthes
- Beckman Vision Center, University of California, San Francisco School of Medicine, San Francisco, CA 94143
| | - Matthew M LaVail
- Beckman Vision Center, University of California, San Francisco School of Medicine, San Francisco, CA 94143
| | - Nawajes A Mandal
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 Dean McGee Eye Institute, Oklahoma City, OK 73104 Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
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Kolawole EM, McLeod JJA, Ndaw V, Abebayehu D, Barnstein BO, Faber T, Spence AJ, Taruselli M, Paranjape A, Haque TT, Qayum AA, Kazmi QA, Wijesinghe DS, Sturgill JL, Chalfant CE, Straus DB, Oskeritzian CA, Ryan JJ. Fluvastatin Suppresses Mast Cell and Basophil IgE Responses: Genotype-Dependent Effects. THE JOURNAL OF IMMUNOLOGY 2016; 196:1461-70. [PMID: 26773154 DOI: 10.4049/jimmunol.1501932] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 12/07/2015] [Indexed: 12/29/2022]
Abstract
Mast cell (MC)- and basophil-associated inflammatory diseases are a considerable burden to society. A significant portion of patients have symptoms despite standard-of-care therapy. Statins, used to lower serum cholesterol, have immune-modulating activities. We tested the in vitro and in vivo effects of statins on IgE-mediated MC and basophil activation. Fluvastatin showed the most significant inhibitory effects of the six statins tested, suppressing IgE-induced cytokine secretion among mouse MCs and basophils. The effects of fluvastatin were reversed by mevalonic acid or geranylgeranyl pyrophosphatase, and mimicked by geranylgeranyl transferase inhibition. Fluvastatin selectively suppressed key FcεRI signaling pathways, including Akt and ERK. Although MCs and basophils from the C57BL/6J mouse strain were responsive to fluvastatin, those from 129/SvImJ mice were completely resistant. Resistance correlated with fluvastatin-induced upregulation of the statin target HMG-CoA reductase. Human MC cultures from eight donors showed a wide range of fluvastatin responsiveness. These data demonstrate that fluvastatin is a potent suppressor of IgE-mediated MC activation, acting at least partly via blockade of geranyl lipid production downstream of HMG-CoA reductase. Importantly, consideration of statin use for treating MC-associated disease needs to incorporate genetic background effects, which can yield drug resistance.
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Affiliation(s)
| | | | - Victor Ndaw
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Daniel Abebayehu
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Brian O Barnstein
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Travis Faber
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Andrew J Spence
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Marcela Taruselli
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Anuya Paranjape
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Tamara T Haque
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Amina A Qayum
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Qasim A Kazmi
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | | | - Jamie L Sturgill
- Department of Family and Community Health, Virginia Commonwealth University School of Nursing, Richmond, VA 23298
| | - Charles E Chalfant
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA 23298; Research and Development, Hunter Holmes McGuire Veterans Administration Medical Center, Richmond, VA 23249; VCU Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298; Virginia Commonwealth University Institute of Molecular Medicine, Richmond, VA 23298; and
| | - David B Straus
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284
| | - Carole A Oskeritzian
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29208
| | - John J Ryan
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284;
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The Integrative Human Microbiome Project: dynamic analysis of microbiome-host omics profiles during periods of human health and disease. Cell Host Microbe 2015; 16:276-89. [PMID: 25211071 PMCID: PMC5109542 DOI: 10.1016/j.chom.2014.08.014] [Citation(s) in RCA: 350] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Much has been learned about the diversity and distribution of human-associated microbial communities, but we still know little about the biology of the microbiome, how it interacts with the host, and how the host responds to its resident microbiota. The Integrative Human Microbiome Project (iHMP, http://hmp2.org), the second phase of the NIH Human Microbiome Project, will study these interactions by analyzing microbiome and host activities in longitudinal studies of disease-specific cohorts and by creating integrated data sets of microbiome and host functional properties. These data sets will serve as experimental test beds to evaluate new models, methods, and analyses on the interactions of host and microbiome. Here we describe the three models of microbiome-associated human conditions, on the dynamics of preterm birth, inflammatory bowel disease, and type 2 diabetes, and their underlying hypotheses, as well as the multi-omic data types to be collected, integrated, and distributed through public repositories as a community resource.
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