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Wilkerson JL, Tatum SM, Holland WL, Summers SA. Ceramides are fuel gauges on the drive to cardiometabolic disease. Physiol Rev 2024; 104:1061-1119. [PMID: 38300524 DOI: 10.1152/physrev.00008.2023] [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: 02/14/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 02/02/2024] Open
Abstract
Ceramides are signals of fatty acid excess that accumulate when a cell's energetic needs have been met and its nutrient storage has reached capacity. As these sphingolipids accrue, they alter the metabolism and survival of cells throughout the body including in the heart, liver, blood vessels, skeletal muscle, brain, and kidney. These ceramide actions elicit the tissue dysfunction that underlies cardiometabolic diseases such as diabetes, coronary artery disease, metabolic-associated steatohepatitis, and heart failure. Here, we review the biosynthesis and degradation pathways that maintain ceramide levels in normal physiology and discuss how the loss of ceramide homeostasis drives cardiometabolic pathologies. We highlight signaling nodes that sense small changes in ceramides and in turn reprogram cellular metabolism and stimulate apoptosis. Finally, we evaluate the emerging therapeutic utility of these unique lipids as biomarkers that forecast disease risk and as targets of ceramide-lowering interventions that ameliorate disease.
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Affiliation(s)
- Joseph L Wilkerson
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - Sean M Tatum
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - William L Holland
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - Scott A Summers
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
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Meikopoulos T, Begou O, Theodoridis G, Gika H. Ceramides biomarkers determination in quantitative dried blood spots by UHPLC-MS/MS. Anal Chim Acta 2023; 1255:341131. [PMID: 37032061 DOI: 10.1016/j.aca.2023.341131] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/10/2023] [Accepted: 03/22/2023] [Indexed: 03/30/2023]
Abstract
A method was developed for the analysis of four ceramide species; namely C16:0, C18:0, C24:0 and C24:1 in quantitative Dried Blood Samples (qDBS) by LC-MS/MS and validated with the aim to give prominence to an interesting application of at-home blood microsampling for health monitoring. Ceramides, being key-role metabolites implicated in regulation of diverse cellular processes have been considered as emerging biomarkers for different disease states, such as cardiovascular diseases, type 2 diabetes and others. Here, Capitainer device was utilized to provide accurate and consistent volumes of samples, ideal for accurate determinations. The method requires a 10 μL sample offering duplicate analysis by device, is quick and enables the sample collection by distance as it was proved that ceramides under study were stable at various conditions, including RT. Intra and inter-day accuracy of the determination were estimated between 87.6% - 113% and 90.6% -113%, respectively, while intra- and inter-day precision were calculated from 0.2% to 9.9% %RSD and 0.1% - 8.0% %RSD, respectively. The data acquired by ten healthy individuals indicated that circulating ceramides are at higher levels in whole blood taken from the fingertip in comparison to the reported values in plasma or serum.
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Sphingolipidomic profile and HDL subfractions in obese dyslipidemic type 2 diabetic patients. Prostaglandins Other Lipid Mediat 2023; 166:106719. [PMID: 36863606 DOI: 10.1016/j.prostaglandins.2023.106719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 02/16/2023] [Accepted: 02/27/2023] [Indexed: 03/04/2023]
Abstract
PURPOSE The aim of the study was to investigate changes in serum sphingolipid levels and high density lipoprotein (HDL) subtypes with relation to low-density lipoprotein cholesterol (LDL-C), non-HDL-C and triglyceride (TG) levels in type 2 diabetes mellitus (T2DM) patients. METHODS Blood was obtained from 60 patients with T2DM. Levels of sphingosine-1-phosphate (S1P), C16-C24 sphingomyelins (SMs), C16-C24 ceramides (CERs), and C16 CER-1 P were determined by LC-MS/MS. Serum concentrations of cholesterol ester transfer protein (CETP), lecithin-cholesterol acyltransferase (LCAT) and apolipoprotein A-1 (apoA-I) were analyzed by enzyme-linked immunosorbent assay (ELISA). HDL subfraction analysis was performed by Disc polyacrylamide gel electrophoresis. RESULTS C16 SM, C24 SM, C24-C16 CER and C16 CER-1 P levels were significantly increased in T2DM patients with LDL-C above 160 mg/dL, compared to those with LDL-C below 100 mg/dL. A significant correlation was observed between C24:C16 SM, C24:C16 CER ratios and LDL-C, non HDL-C levels. Higher serum levels of C24 SM, C24-C18 CER and C24:C16 SM ratio was seen in obese T2DM patients (BMI>30) compared to those with BMI 27-30. Patients with fasting TG levels below 150 mg/dL had significantly increased HDL-large and significantly decreased HDL-small fractions compared to those with fasting TG levels above 150 mg/dL. CONCLUSION Obese dyslipidemic T2DM patients had increased levels of serum sphingomyelins, ceramides and HDL-small fractions. The ratio of serum C24:C16 SM, C24:C16 CER and long chain CER levels may be used as diagnostic and prognostic indicators of dyslipidemia in T2DM.
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Zeng K, Zhou X, Liu W, Nie C, Zhang Y. Determination of endogenous sphingolipid content in stroke rats and HT22 cells subjected to oxygen-glucose deprivation by LC‒MS/MS. Lipids Health Dis 2023; 22:13. [PMID: 36698123 PMCID: PMC9878918 DOI: 10.1186/s12944-022-01762-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/20/2022] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Stroke is the leading cause of death in humans worldwide, and its incidence increases every year. It is well documented that lipids are closely related to stroke. Analyzing the changes in lipid content in the stroke model after absolute quantification and investigating whether changes in lipid content can predict stroke severity provides a basis for the combination of clinical stroke and quantitative lipid indicators. METHODS This paper establishes a rapid, sensitive, and reliable LC‒MS/MS analytical method for the detection of endogenous sphingolipids in rat serum and brain tissue and HT22 cells and quantifies the changes in sphingolipid content in the serum and brain tissue of rats from the normal and pMCAO groups and in cells from the normal and OGD/R groups. Using sphingosine (d17:1) as the internal standard, a chloroform: methanol (9:1) mixed system was used for protein precipitation and lipid extraction, followed by analysis by reversed-phase liquid chromatography coupled to triple quadrupole mass spectrometry. RESULTS Based on absolute quantitative analysis of lipids in multiple biological samples, our results show that compared with those in the normal group, the contents of sphinganine (d16:0), sphinganine (d18:0), and phytosphingosine were significantly increased in the model group, except sphingosine-1-phosphate, which was decreased in various biological samples. The levels of each sphingolipid component in serum fluctuate with time. CONCLUSION This isotope-free and derivatization-free LC‒MS/MS method can achieve absolute quantification of sphingolipids in biological samples, which may also help identify lipid biomarkers of cerebral ischemia.
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Affiliation(s)
- Keqi Zeng
- grid.411866.c0000 0000 8848 7685Department of Pharmaceutics, College of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangdong 51006 Guangzhou, China
| | - Xin Zhou
- grid.411866.c0000 0000 8848 7685Department of Pharmaceutics, College of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangdong 51006 Guangzhou, China
| | - Wanyi Liu
- grid.411866.c0000 0000 8848 7685Department of Pharmaceutics, College of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangdong 51006 Guangzhou, China
| | - Cong Nie
- grid.411866.c0000 0000 8848 7685Department of Pharmaceutics, College of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangdong 51006 Guangzhou, China
| | - Yingfeng Zhang
- grid.411866.c0000 0000 8848 7685Department of Pharmaceutics, College of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangdong 51006 Guangzhou, China
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Nicholson RJ, Norris MK, Poss AM, Holland WL, Summers SA. The Lard Works in Mysterious Ways: Ceramides in Nutrition-Linked Chronic Disease. Annu Rev Nutr 2022; 42:115-144. [PMID: 35584813 PMCID: PMC9399075 DOI: 10.1146/annurev-nutr-062220-112920] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Diet influences onset, progression, and severity of several chronic diseases, including heart failure, diabetes, steatohepatitis, and a subset of cancers. The prevalence and clinical burden of these obesity-linked diseases has risen over the past two decades. These metabolic disorders are driven by ectopic lipid deposition in tissues not suited for fat storage, leading to lipotoxic disruption of cell function and survival. Sphingolipids such as ceramides are among the most deleterious and bioactive metabolites that accrue, as they participate in selective insulin resistance, dyslipidemia, oxidative stress and apoptosis. This review discusses our current understanding of biochemical pathways controlling ceramide synthesis, production and action; influences of diet on ceramide levels; application of circulating ceramides as clinical biomarkers of metabolic disease; and molecular mechanisms linking ceramides to altered metabolism and survival of cells. Development of nutritional or pharmacological strategies to lower ceramides could have therapeutic value in a wide range of prevalent diseases.
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Affiliation(s)
- Rebekah J. Nicholson
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, Utah, USA,Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, Utah, USA
| | - Marie K. Norris
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, Utah, USA,Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, Utah, USA
| | - Annelise M. Poss
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, Utah, USA,Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, Utah, USA
| | - William L. Holland
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, Utah, USA,Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, Utah, USA
| | - Scott A. Summers
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, Utah, USA,Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, Utah, USA
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Çeker T, Yılmaz Ç, Kırımlıoglu E, Aslan M. Endoplasmic-reticulum-stress-induced lipotoxicity in human kidney epithelial cells. Toxicol Res (Camb) 2022; 11:683-695. [PMID: 36051659 PMCID: PMC9424710 DOI: 10.1093/toxres/tfac041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 06/08/2022] [Accepted: 06/21/2022] [Indexed: 07/24/2023] Open
Abstract
Accumulation of lipids and their intermediary metabolites under endoplasmic reticulum (ER) stress instigates metabolic failure, described as lipotoxicity, in the kidney. This study aimed to determine ER-stress-related sphingolipid and polyunsaturated fatty acid (PUFA) changes in human kidney cells. Tunicamycin (TM) was employed to induce ER stress and an ER stress inhibitor, tauroursodeoxycholic acid (TUDCA), was given to minimize cytotoxicity. Cell viability was determined by MTT assay. Sphingomyelin (SM), ceramide (CER), and PUFA levels were measured by LC-MS/MS. Glucose-regulated protein 78-kd (GRP78), cleaved caspase-3 and cyclooxygenase-1 (COX-1) levels were assessed by immunofluorescence. Cytosolic phospholipase A2 (cPLA2), total COX, and prostaglandin E2 (PGE2) were measured to evaluate changes in enzyme activity. Decreased cell viability was observed in TM treated cells. Administration of TUDCA following TM treatment significantly increased cell viability compared to TM treatment alone. Tunicamycin-induced ER stress was confirmed by significantly increased protein levels of GRP78. A significant increase was observed in C18-C24 CERs and caspase-3 activity, while a significant decrease occurred in sphingosine-1-phosphate (S1P) and cPLA2 activity in cells treated with TM versus controls. The decrease in cPLA2 activity was accompanied by significantly increased PUFA levels in TM treated cells. TUDCA treatment in conjunction with TM significantly decreased ER stress, C18-C24 CERs, caspase 3 activity, and increased S1P levels. Results show the buildup of long chain CERs and PUFAs in kidney cells undergoing ER stress alongside increased apoptotic activity. TUDCA administration, along with TM treatment alleviated the buildup of CERs and TM-induced apoptotic activity in kidney epithelial cells.
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Affiliation(s)
- Tuğçe Çeker
- Department of Medical Biochemistry, Akdeniz University, Faculty of Medicine, Antalya 07070, Turkey
| | - Çağatay Yılmaz
- Department of Medical Biochemistry, Akdeniz University, Faculty of Medicine, Antalya 07070, Turkey
| | - Esma Kırımlıoglu
- Department of Histology and Embryology, Akdeniz University, Faculty of Medicine, Antalya 07070, Turkey
| | - Mutay Aslan
- Corresponding author: Akdeniz University Medical School, Department of Biochemistry, Antalya 07070, Turkey.
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Poss AM, Krick B, Maschek JA, Haaland B, Cox JE, Karra P, Ibele AR, Hunt SC, Adams TD, Holland WL, Playdon MC, Summers SA. Following Roux-en-Y gastric bypass surgery, serum ceramides demarcate patients that will fail to achieve normoglycemia and diabetes remission. MED 2022; 3:452-467.e4. [PMID: 35709767 PMCID: PMC9271635 DOI: 10.1016/j.medj.2022.05.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 05/04/2022] [Accepted: 05/20/2022] [Indexed: 12/28/2022]
Abstract
BACKGROUND Obesity is a prevalent health threat and risk factor for type 2 diabetes. In this study, we evaluate the relationship between ceramides, which inhibit insulin secretion and sensitivity, and markers of glucose homeostasis and diabetes remission or recursion in patients who have undergone a Roux-en-Y gastric bypass (RYGB). METHODS The Utah Obesity Study is a prospective cohort study, with targeted ceramide and dihydroceramide measurements performed on banked serum samples. The Utah Obesity Study consists of 1,156 participants in three groups: a RYGB surgery group, a non-surgery group denied insurance coverage, and severely obese population controls. Clinical examinations and ceramide assessments were performed at baseline and 2 and 12 years after RYGB surgery. FINDINGS Surgery patients (84% female, 42.2 ± 10.6 years of age at baseline) displayed lower levels of several serum dihydroceramides and ceramides at 2 and 12 years after RYGB. By contrast, neither the control group (77% female, 48.7± 6.4 years of age at baseline) nor the non-surgery group (95% female, 43.0± 11.4 years of age at baseline) experienced significant decreases in any species. Using a linear mixed effect model, we found that multiple dihydroceramides and ceramides positively associated with the glycemic control measures HOMA-IR and HbA1c. In surgery group participants with prevalent diabetes, ceramides inversely predict diabetes remission, independent of changes in weight. CONCLUSIONS Ceramide decreases may explain the insulin sensitization and diabetes resolution observed in most RYGB surgery patients. FUNDING Funded by the National Institutes of health (NIH), The Juvenile Diabetes Research Foundation, and the American Heart Association.
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Affiliation(s)
- Annelise M Poss
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, UT 84112, USA; Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, UT, USA
| | - Benjamin Krick
- Cancer Control and Population Sciences, Huntsman Cancer Institute, Salt Lake City, UT, USA
| | - J Alan Maschek
- Department of Biochemistry, University of Utah College of Medicine, Salt Lake City, UT, USA; Metabolomics Core Research Facility, University of Utah, Salt Lake City, UT, USA; Proteomics Core Research Facility, University of Utah, Salt Lake City, UT, USA
| | - Benjamin Haaland
- Department of Population Health Sciences, University of Utah, Salt Lake City, UT, USA; Huntsman Cancer Institute, Salt Lake City, UT, USA
| | - James E Cox
- Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, UT, USA; Department of Biochemistry, University of Utah College of Medicine, Salt Lake City, UT, USA; Metabolomics Core Research Facility, University of Utah, Salt Lake City, UT, USA
| | - Prasoona Karra
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, UT 84112, USA; Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, UT, USA; Cancer Control and Population Sciences, Huntsman Cancer Institute, Salt Lake City, UT, USA
| | - Anna R Ibele
- Department of Surgery, University of Utah, Salt Lake City, UT, USA
| | - Steven C Hunt
- Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA; Department of Genetic Medicine, Weill Cornell Medicine, Doha, Qatar
| | - Ted D Adams
- Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA; Intermountain Live Well Center Salt Lake, Intermountain Healthcare, Salt Lake City, UT, USA
| | - William L Holland
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, UT 84112, USA; Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, UT, USA
| | - Mary C Playdon
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, UT 84112, USA; Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, UT, USA; Cancer Control and Population Sciences, Huntsman Cancer Institute, Salt Lake City, UT, USA
| | - Scott A Summers
- Department of Nutrition and Integrative Physiology, University of Utah College of Health, Salt Lake City, UT 84112, USA; Diabetes and Metabolism Research Center, University of Utah College of Medicine, Salt Lake City, UT, USA.
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Aslan M. Polyunsaturated Fatty Acid and Sphingolipid Measurements by Tandem Mass Spectrometry. MINI-REV ORG CHEM 2021. [DOI: 10.2174/1570193x17999200504094901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Linoleic Acid (LA) (omega-6) and Alpha-Linolenic Acid (ALA) (omega-3) are essential
fatty acids and give rise to Arachidonic Acid (AA), Eicosapentaenoic Acid (EPA) and Docosahexaenoic
Acid (DHA) that are important in metabolic homeostasis. The omega-6:omega-3 ratio can be
a prognostic consideration in cardiovascular and inflammatory diseases. Sphingolipids are bioactive
lipids found in cell membranes that play a role in cell growth, differentiation and apoptosis. Electrospray
Ionization (ESI) coupled with tandem Mass Spectrometry (MS/MS) is a simple and speedy
method to identify and quantify these lipids in various biological matrices. Tandem mass spectrometric
analyses can be performed on cell lysates, tissue homogenates and serum samples to measure
quantitative changes directly in lipid extracts from these different matrices. The present review summarizes
measurement of omega-3 (n-3) and omega-6 (n-6) Polyunsaturated Fatty Acids (PUFAs),
their metabolism to eicosanoids and their role in certain disease states. Altered sphingolipid metabolism
is also associated with a number of human diseases. Therefore, understanding sphingolipid metabolism
is important to comprehend the function of sphingolipids in cellular processes. In this review,
we focus on pathways of Ceramide (CER) and Sphingomyelin (SM) synthesis and discuss altered
levels reported in disease states. Results of reported studies herein clearly show that PUFAs,
SMs and CERs carry out a large number of fundamental functions. They serve as structural elements
in cellular membranes, and they work as signaling molecules. Alterations in their amounts of expression
occurring in diabetes, obesity, inflammation and ER stress-related conditions lead to dysfunctions
contributing to disease pathogenesis.
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Affiliation(s)
- Mutay Aslan
- Department of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey
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Aslan M, Elpek Ö, Akkaya B, Balaban HT, Afşar E. Organ function, sphingolipid levels and inflammation in tunicamycin induced endoplasmic reticulum stress in male rats. Hum Exp Toxicol 2021; 40:259-273. [PMID: 33527851 DOI: 10.1177/0960327120949619] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Disorders of the endoplasmic reticulum (ER) lead to cellular damage but can cause cell death if ER dysfunction is prolonged. We aimed to examine liver/kidney functions, neutral sphingomyelinase (N-SMase) activity, sphingolipid levels, cytosolic phospholipase A2 (cPLA2) and cyclooxygenase-2 (COX-2) protein expression in rats under ER stress. ER stress was induced by tunicamycin (TM) and the ER stress inhibitor taurodeoxycholic acid (TUDCA) was injected before induction of ER stress. ER stress was confirmed by increased tissue levels of GRP78. Hematological and biochemical profiles were measured by autoanalyzers while hepatic and renal injury was evaluated via microscopy and histopathological scoring. Tissue levels of C16-C24 sphingomyelins (SM), C16-C24 ceramides (CERs) and sphingosine-1-phosphate (S1P) were determined by LC-MS/MS. Tissue cPLA2 and COX-2 were measured by western blot and activity assays. Tunicamycin treatment caused kidney and liver function test abnormalities, increased hematocrit and hemoglobin levels but decreased white blood cell counts. Histopathological findings showed hepatic necroinflammation and renal tubular damage in rats treated with TM. TUDCA administration attenuated WBC abnormalities and TM- induced hepatic/renal functional impairment in ER stress, as evident by significantly restored serum ALT, AST, creatinine, and total bilirubin levels. A significant increase was observed in N-SMase activity, tissue levels of C16-C24 CERs, cPLA2 and COX-2 expression in liver and kidney tissue under ER stress. TUDCA administration decreased tissue CER levels, cPLA2 and COX-2 expression as well as prostaglandin E2 (PGE2) formation. These results signify that ER stress causes hepatic and renal toxicity as well as CER-induced PGE2 formation in liver and kidney.
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Affiliation(s)
- Mutay Aslan
- Department of Medical Biochemistry, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Özlem Elpek
- Department of Pathology, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Bahar Akkaya
- Department of Pathology, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Hazal Tuzcu Balaban
- Department of Pathology, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Ebru Afşar
- Department of Medical Biochemistry, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
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Liakh I, Sledzinski T, Kaska L, Mozolewska P, Mika A. Sample Preparation Methods for Lipidomics Approaches Used in Studies of Obesity. Molecules 2020; 25:E5307. [PMID: 33203044 PMCID: PMC7696154 DOI: 10.3390/molecules25225307] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 02/06/2023] Open
Abstract
Obesity is associated with alterations in the composition and amounts of lipids. Lipids have over 1.7 million representatives. Most lipid groups differ in composition, properties and chemical structure. These small molecules control various metabolic pathways, determine the metabolism of other compounds and are substrates for the syntheses of different derivatives. Recently, lipidomics has become an important branch of medical/clinical sciences similar to proteomics and genomics. Due to the much higher lipid accumulation in obese patients and many alterations in the compositions of various groups of lipids, the methods used for sample preparations for lipidomic studies of samples from obese subjects sometimes have to be modified. Appropriate sample preparation methods allow for the identification of a wide range of analytes by advanced analytical methods, including mass spectrometry. This is especially the case in studies with obese subjects, as the amounts of some lipids are much higher, others are present in trace amounts, and obese subjects have some specific alterations of the lipid profile. As a result, it is best to use a method previously tested on samples from obese subjects. However, most of these methods can be also used in healthy, nonobese subjects or patients with other dyslipidemias. This review is an overview of sample preparation methods for analysis as one of the major critical steps in the overall analytical procedure.
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Affiliation(s)
- Ivan Liakh
- Department of Pharmaceutical Biochemistry, Medical University of Gdansk, Debinki 1, 80-211 Gdansk, Poland; (I.L.); (T.S.); (P.M.)
- Department of Toxicology, Medical University of Gdańsk, Al. Gen. Hallera 107, 80-416 Gdańsk, Poland
| | - Tomasz Sledzinski
- Department of Pharmaceutical Biochemistry, Medical University of Gdansk, Debinki 1, 80-211 Gdansk, Poland; (I.L.); (T.S.); (P.M.)
| | - Lukasz Kaska
- Department of General, Endocrine and Transplant Surgery, Faculty of Medicine, Medical University of Gdansk, Smoluchowskiego 17, 80-214 Gdansk, Poland;
| | - Paulina Mozolewska
- Department of Pharmaceutical Biochemistry, Medical University of Gdansk, Debinki 1, 80-211 Gdansk, Poland; (I.L.); (T.S.); (P.M.)
| | - Adriana Mika
- Department of Pharmaceutical Biochemistry, Medical University of Gdansk, Debinki 1, 80-211 Gdansk, Poland; (I.L.); (T.S.); (P.M.)
- Department of Environmental Analysis, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland
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Raichur S. Ceramide Synthases Are Attractive Drug Targets for Treating Metabolic Diseases. Front Endocrinol (Lausanne) 2020; 11:483. [PMID: 32849276 PMCID: PMC7403459 DOI: 10.3389/fendo.2020.00483] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 06/22/2020] [Indexed: 12/11/2022] Open
Abstract
Ceramide synthases (CerS) are central enzymes required for the de-novo synthesis of ceramides and other sphingolipids. They catalyze the addition of different acyl-chains to a sphingoid base, and thus account for much of the rich diversity in the sphingolipid family. Recent studies have demonstrated that the acyl-chain is an important determinant of ceramide function, such that a small subset of ceramides (e.g., those containing the C16 or C18 acyl-chain) alter metabolism by inhibiting insulin signaling or inducing mitochondrial fragmentation. Herein I discuss the therapeutic potential of targeting certain ceramide synthase isoforms for the treatment of obesity, insulin resistance, steatohepatitis, and other metabolic disorders.
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Aslan M, Afşar E, Kırımlıoglu E, Çeker T, Yılmaz Ç. Antiproliferative Effects of Thymoquinone in MCF-7 Breast and HepG2 Liver Cancer Cells: Possible Role of Ceramide and ER Stress. Nutr Cancer 2020; 73:460-472. [PMID: 32286088 DOI: 10.1080/01635581.2020.1751216] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We aimed to investigate the impact of thymoquinone (TQ), on sphingolipid metabolites, ER stress and apoptotic pathways in MCF-7 and HepG2 cancer cells. Antiproliferative effect was exerted in cancer cells via TQ incubation at different doses and durations. Cell viability was measured by MTT assay. Levels of sphingosine-1-phosphate (S1P), C16-C24 sphingomyelins (SM) and C16-C24 ceramides (CER) were determined by LC-MS/MS. Neutral sphingomyelinase (N-SMase) enzyme activity was measured by colorimetric assay and ceramide-1-phosphate (C1P) levels were determined by immunoassay. Nuclear factor kappa-b subunit 1 (NFκB1) and glucose-regulated protein 78-kd (GRP78) gene expressions were evaluated by quantitative PCR analysis, while NF-κB p65, GRP 78 and cleaved caspase-3 protein levels were assesed by immunofluorescence and western blot analysis. Incubation with TQ significantly decreased cell viability, S1P, C1P, NF-κB1 mRNA and NF-κB p65 protein levels in cancer cells compared to controls. A significant increase was observed in N-SMase activity, cellular levels of C16-C24 CERs and cleaved caspase-3 levels in cancer cells treated with TQ. GRP78 mRNA and protein levels also increased in cancer cells treated with TQ. In conclusion, TQ-induced ceramide accumulation and ER stress in conjunction with decreased S1P, C1P and NF-κB mediated cell survival may promote cancer cell death by triggering apoptosis.
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Affiliation(s)
- Mutay Aslan
- Departments of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Ebru Afşar
- Departments of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Esma Kırımlıoglu
- Departments of Histology, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Tuğçe Çeker
- Departments of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Çağatay Yılmaz
- Departments of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey
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Afşar E, Kırımlıoglu E, Çeker T, Yılmaz Ç, Demir N, Aslan M. Effect of ER stress on sphingolipid levels and apoptotic pathways in retinal pigment epithelial cells. Redox Biol 2020; 30:101430. [PMID: 31978676 PMCID: PMC6976939 DOI: 10.1016/j.redox.2020.101430] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 12/30/2019] [Accepted: 01/10/2020] [Indexed: 12/31/2022] Open
Abstract
Background We aimed to determine sphingolipid levels and examine apoptotic pathways in human retinal pigment epithelial cells (ARPE-19) undergoing endoplasmic reticulum (ER) stress. Methods Cells were treated with tunicamycin (TM) to induce ER stress and tauroursodeoxycholic acid (TUDCA), an ER stress inhibitor, was administered to decrease cytotoxicity. Cell viability was measured by MTT assay. Levels of C16–C24 sphingomyelins (SM) and C16–C24 ceramides (CERs) were determined by LC-MS/MS. Glucose-regulated protein 78-kd (GRP78) and nuclear factor kappa-b subunit 1 (NFκB1) gene expressions were evaluated by quantitative PCR analysis, while GRP 78, NF-κB p65, cleaved caspase-3 and caspase-12 protein levels were assesed by immunofluorescence. Ceramide-1-phosphate (C1P) levels were determined by immunoassay, while caspase −3 and −12 activity in cell lysates were measured via a fluorometric method. Results Induction of ER stress in TM treated groups were confirmed by significantly increased mRNA and protein levels of GRP78. TM significantly decreased cell viability compared to controls. Treatment with TUDCA along with TM significantly increased cell viability compared to the TM group. A significant increase was observed in C22–C24 CERs, C1P, caspase-3, caspase-12, NFκB1 mRNA and NF-κB p65 protein levels in cells treated with TM compared to controls. Administration of TUDCA lead to a partial decrease in GRP78 expression, NFκB1 mRNA, NF-κB p65 protein, C22–C24 CERs and C1P levels along with a decrease in caspase-3 and -12 activity. Conclusions The results of this study reveal the presence of increased long chain CERs, C1P and apoptotic markers in retinal cells undergoing ER stress.
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Affiliation(s)
- Ebru Afşar
- Department of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey.
| | - Esma Kırımlıoglu
- Department of Histology, Akdeniz University Faculty of Medicine, Antalya, Turkey.
| | - Tuğçe Çeker
- Department of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey.
| | - Çağatay Yılmaz
- Department of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey.
| | - Necdet Demir
- Department of Histology, Akdeniz University Faculty of Medicine, Antalya, Turkey.
| | - Mutay Aslan
- Department of Medical Biochemistry, Akdeniz University Faculty of Medicine, Antalya, Turkey.
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Drazba MA, Holásková I, Sahyoun NR, Ventura Marra M. Associations of Adiposity and Diet Quality with Serum Ceramides in Middle-Aged Adults with Cardiovascular Risk Factors. J Clin Med 2019; 8:E527. [PMID: 30999626 PMCID: PMC6517875 DOI: 10.3390/jcm8040527] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/12/2019] [Accepted: 04/16/2019] [Indexed: 02/06/2023] Open
Abstract
Rates of adverse cardiovascular events have increased among middle-aged adults. Elevated ceramides have been proposed as a risk factor for cardiovascular events. Diet quality and weight status are inversely associated with several traditional risk factors; however, the relationship to ceramides is less clear. This study aimed to determine associations of adiposity and diet quality with circulating ceramides in middle-aged adults (n = 96). Diet quality was estimated using the Healthy Eating Index 2015 (HEI-2015). Serum ceramide concentrations were determined by liquid chromatography-mass spectrometry. A ceramide risk score was determined based on ceramides C16:0, C18:0, and C24:1 and their ratios to C24:0. Participants who were classified as at 'moderate risk' compared to 'lower-risk' based on a ceramide risk score had significantly higher body mass index (BMI) values, as well as higher rates of elevated fibrinogen levels, metabolic syndrome, and former smoking status. BMI was positively associated with the ceramide C18:0 (R2 = 0.31, p < 0.0001), the ratio between C18:0/C24:0 ceramides (R2 = 0.30, p < 0.0001), and the ceramide risk score (R2 = 0.11, p < 0.009). Total HEI-2015 scores (R2 = 0.42, p = 0.02), higher intakes of vegetables (R2 = 0.44, p = 0.02) and whole grains (R2 = 0.43, p = 0.03), and lower intakes of saturated fats (R2 = 0.43, p = 0.04) and added sugar (R2 = 0.44, p = 0.01) were associated with lower C22:0 values. These findings suggest that circulating ceramides are more strongly related to adiposity than overall diet quality. Studies are needed to determine if improvements in weight status result in lower ceramides and ceramide risk scores.
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Affiliation(s)
- Margaret A Drazba
- Division of Animal and Nutritional Sciences, West Virginia University, Morgantown, WV 26506, USA.
| | - Ida Holásková
- Office of Statistics, West Virginia University, Davis College of Agriculture, Natural Resources and Design, West Virginia Agriculture and Forestry Experiment Station, Morgantown, WV 26506-6108, USA.
| | - Nadine R Sahyoun
- Department of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA.
| | - Melissa Ventura Marra
- Division of Animal and Nutritional Sciences, West Virginia University, Morgantown, WV 26506, USA.
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