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Hezarkhani S, Hajighaderi A, Hosseinzadeh S, Behnampour N, Veghari G, Fathabadi F, Hesari Z, Joshaghani HR. The serum levels of angiopoietin-like protein 3 and 4 in type 2 diabetic patients with and without metabolic syndrome compared to the control group. Endocrinol Diabetes Metab 2024; 7:e466. [PMID: 38140923 PMCID: PMC10782050 DOI: 10.1002/edm2.466] [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: 11/08/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 12/24/2023] Open
Abstract
INTRODUCTION ANGPTLs (Angiopoietin-like proteins) 3 and 4 play an important role in the development of type 2 diabetes. These glycoproteins affect the modulation of glucose and lipid metabolism. They inhibit lipoprotein lipase (LPL) activity and provoke lipolysis. This study was aimed to investigate the protein levels of ANGPTL3 and 4 in the serum of type 2 diabetic patients with metabolic syndrome in comparison to the type 2 diabetic patients without metabolic syndrome and the control group. METHODS Three groups of individuals were included in this study; Group I: 47 patients with type 2 diabetes and metabolic syndrome; Group II: 25 patients with type 2 diabetes without metabolic syndrome; Group III: 40 non-diabetic healthy people without metabolic syndrome as a control group. After collection of 5 mL fasting blood samples, serum concentrations of fasting blood sugar (FBS), cholesterol (Chol), triglyceride (TG), HDL-C (High-density lipoprotein-Cholesterol) and LDL-C (Low-density lipoprotein-Cholesterol) were measured by the enzymatic method; blood pressure (BP), height and weight with stadiometers; and ANGPTL3 and 4 by the enzyme-linked immunosorbent assay (ELISA). RESULTS The serum levels of ANGPTL3 was significantly different among our three groups (p = .000). In patients with type 2 diabetes and metabolic syndrome (Group I), ANGPTL3 and 4 levels were lower than the control group. The serum levels of the parameters evaluated in this study (except HDL-C) was lower in the group II in comparison with the group I, and this difference was significant for TG, Chol, BP and BMI between these two groups. Also, our results revealed that there was a negative correlation between FBS, TG, Chol, LDL-C and BMI with ANGPTL3 and 4. While, there was a significant positive correlation between ANGPTL4 and ANGPTL3. CONCLUSION Altogether, our findings suggest that the decreased levels of ANGPTL3 and 4 may be a causative factor for type 2 diabetes.
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Affiliation(s)
- Sharabeh Hezarkhani
- Metabolic Disorders Research CenterGolestan University of Medical SciencesGorganIran
| | - Aytekin Hajighaderi
- Laboratory Sciences Research CenterGolestan University of Medical SciencesGorganIran
| | - Sara Hosseinzadeh
- Laboratory Sciences Research CenterGolestan University of Medical SciencesGorganIran
| | - Naser Behnampour
- Department of Biostatistics, Faculty of HealthGolestan University of Medical SciencesGorganIran
| | - Gholamreza Veghari
- Ischemic Disorders Research CenterGolestan University of Medical SciencesGorganIran
| | - Farshid Fathabadi
- Laboratory Sciences Research CenterGolestan University of Medical SciencesGorganIran
| | - Zahra Hesari
- Laboratory Sciences Research CenterGolestan University of Medical SciencesGorganIran
| | - Hamid Reza Joshaghani
- Laboratory Sciences Research CenterGolestan University of Medical SciencesGorganIran
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Khanlarkhani N, Azizi E, Amidi F, Khodarahmian M, Salehi E, Pazhohan A, Farhood B, Mortezae K, Goradel NH, Nashtaei MS. Metabolic risk factors of ovarian cancer: a review. JBRA Assist Reprod 2022; 26:335-347. [PMID: 34751020 PMCID: PMC9118962 DOI: 10.5935/1518-0557.20210067] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 08/29/2021] [Indexed: 11/20/2022] Open
Abstract
Ovarian cancer continues to be the leading cause of death from gynecological cancers. Despite inconsistent results, patients with metabolic abnormalities, including obesity and diabetes mellitus (DM), have poorer outcomes, showing a correlation with ovarian cancer incidence and ovarian cancer survival. Since ovarian cancer is the most common cancer in women, and considering the increasing prevalence of obesity and DM, this paper reviews the literature regarding the relationship between the aforementioned metabolic derangements and ovarian cancer, with a focus on ovarian cancer incidence, mortality, and likely mechanisms behind them. Several systematic reviews and meta-analyses have shown that obesity is associated with a higher incidence and poorer survival in ovarian cancer. Although more studies are required to investigate the etiological relation of DM and ovarian cancer, sufficient biological evidence indicates poorer outcomes and shorter survival in DM women with ovarian cancer. A variety of pathologic factors may contribute to ovarian cancer risk, development, and survival, including altered adipokine expression, increased levels of circulating growth factors, altered levels of sex hormones, insulin resistance, hyperinsulinemia, and chronic inflammation. Thus, obesity and DM, as changeable risk factors, can be targeted for intervention to prevent ovarian cancer and improve its outcomes.
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Affiliation(s)
- Neda Khanlarkhani
- Department of Physiology and Pharmacology, Karolinska Institute, Sweden
| | - Elham Azizi
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fardin Amidi
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahshad Khodarahmian
- Infertility department, Arash Women's Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Ensieh Salehi
- Department of Gynecology, School of Medicine, Fertility and Infertility Research Center, Dr. Ali Shariati Hospital, Shahid Mohammadi Hospital, Hormozgan University of Medical Sciences, Hormozgan, Iran
| | - Azar Pazhohan
- Infertility Center, Academic Center for Education, Culture and Research, East Azarbaijan, Tabriz, Iran. / Department of Midwifery, Urmia Branch, Islamic Azad University, Urmia, Iran
| | - Bagher Farhood
- Departments of Medical Physics and Radiology, Faculty of Paramedical Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Keywan Mortezae
- Department of Anatomy, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Nasser Hashemi Goradel
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Shabani Nashtaei
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. / Infertility Department, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Lockridge A, Hanover JA. A nexus of lipid and O-Glcnac metabolism in physiology and disease. Front Endocrinol (Lausanne) 2022; 13:943576. [PMID: 36111295 PMCID: PMC9468787 DOI: 10.3389/fendo.2022.943576] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 07/27/2022] [Indexed: 11/13/2022] Open
Abstract
Although traditionally considered a glucose metabolism-associated modification, the O-linked β-N-Acetylglucosamine (O-GlcNAc) regulatory system interacts extensively with lipids and is required to maintain lipid homeostasis. The enzymes of O-GlcNAc cycling have molecular properties consistent with those expected of broad-spectrum environmental sensors. By direct protein-protein interactions and catalytic modification, O-GlcNAc cycling enzymes may provide both acute and long-term adaptation to stress and other environmental stimuli such as nutrient availability. Depending on the cell type, hyperlipidemia potentiates or depresses O-GlcNAc levels, sometimes biphasically, through a diversity of unique mechanisms that target UDP-GlcNAc synthesis and the availability, activity and substrate selectivity of the glycosylation enzymes, O-GlcNAc Transferase (OGT) and O-GlcNAcase (OGA). At the same time, OGT activity in multiple tissues has been implicated in the homeostatic regulation of systemic lipid uptake, storage and release. Hyperlipidemic patterns of O-GlcNAcylation in these cells are consistent with both transient physiological adaptation and feedback uninhibited obesogenic and metabolic dysregulation. In this review, we summarize the numerous interconnections between lipid and O-GlcNAc metabolism. These links provide insights into how the O-GlcNAc regulatory system may contribute to lipid-associated diseases including obesity and metabolic syndrome.
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Angiopoietin-like Proteins in Colorectal Cancer-A Literature Review. Int J Mol Sci 2021; 22:ijms22168439. [PMID: 34445141 PMCID: PMC8395131 DOI: 10.3390/ijms22168439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/22/2021] [Accepted: 08/03/2021] [Indexed: 12/14/2022] Open
Abstract
Colorectal cancer (CRC) is one of the most common types of malignancy, with an annual incidence of about 10% of the total number of new cases. Despite well-developed screening tests, mortality from this type of cancer remains unchanged. Therefore, it is important to search for more accurate markers that are useful in the detection of colorectal cancer (especially in its early stages), and treatment. Angiopoietin-like proteins (ANGPTLs) are a family of eight proteins with a diversity of applications, including pro- and anti-angiogenic properties. Consequently, we performed an extensive search of the literature, pertaining to our investigation, via the MEDLINE/PubMed database. Based on the available literature, we summarize that some of those proteins are characterized by increased or decreased concentrations during the course of CRC. We can also assume that some ANGPTLs can inhibit the development of CRC, while others induce its progress. Moreover, some factors are dependent on the stage or histological type of the tumor, the presence of hypoxia, or metastases. Most importantly, some ANGPTLs can be useful in anti-cancer therapy. Therefore, further studies on ANGPTLs as potential markers of CRC should be continued.
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The antagonic behavior of GPIHBP1 between EAT and circulation does not reflect lipolytic enzymes levels in the tissue and serum from coronary patients. Clin Chim Acta 2020; 510:423-429. [DOI: 10.1016/j.cca.2020.08.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/22/2020] [Accepted: 08/04/2020] [Indexed: 12/24/2022]
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McCulloch LJ, Bramwell LR, Knight B, Kos K. Circulating and tissue specific transcription of angiopoietin-like protein 4 in human Type 2 diabetes. Metabolism 2020; 106:154192. [PMID: 32112823 DOI: 10.1016/j.metabol.2020.154192] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 02/12/2020] [Accepted: 02/24/2020] [Indexed: 02/07/2023]
Abstract
AIMS Obesity is associated with adipose tissue (AT) dysfunction marked by cellular hypertrophy, inflammation, hypoxia and fibrosis. Angiopoietin-like protein 4 (ANGPTL4) inhibits lipoprotein lipase which regulates triglyceride storage. Recently, inhibition of ANGPTL4 has been suggested as potential treatment for type 2 diabetes. Here we evaluate ANGPTL4's role in diabetes and examine ANGPTL4 in relation to markers of AT dysfunction and fatty liver disease. MATERIALS & METHODS We obtained a unique set of paired samples from subjects undergoing weight loss surgery including subcutaneous AT (SCAT), omental AT (OMAT), liver, thigh muscle biopsies and serum including a post-surgical SCAT biopsy after 9 months. RESULTS SCAT ANGPTL4 expression and circulating protein levels were higher in people with diabetes and correlated with glucose levels and HOMA-IR but not BMI. At post-surgical follow up, SCAT ANGPTL4 declined in subjects with diabetes to levels of those without diabetes. ANGPTL4 expression correlated with HIF1A and inflammation (MCP-1, IL-6). CONCLUSIONS We found that SCAT ANGPTL4 was closely linked with the expression of ANGPTL4 in the liver and represented a good proxy for liver steatosis. We suggest the elevation of ANGPTL4 levels in diabetes and the association with inflammation and hypoxia is due to a compensatory mechanism to limit further AT dysfunction. A reduction of ANGPTL4 for the treatment of T2DM as previously suggested is thus unlikely to be of further benefit.
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Affiliation(s)
- Laura J McCulloch
- Diabetes and Obesity Research Group, Institute of Biological and Clinical Sciences, University of Exeter, EX2 5DW, United Kingdom of Great Britain and Northern Ireland
| | - Laura R Bramwell
- Diabetes and Obesity Research Group, Institute of Biological and Clinical Sciences, University of Exeter, EX2 5DW, United Kingdom of Great Britain and Northern Ireland
| | - Bridget Knight
- Exeter NIHR Clinical Research Facility, RILD, Exeter EX2 5DW, United Kingdom of Great Britain and Northern Ireland
| | - Katarina Kos
- Diabetes and Obesity Research Group, Institute of Biological and Clinical Sciences, University of Exeter, EX2 5DW, United Kingdom of Great Britain and Northern Ireland.
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Hjelholt AJ, Søndergaard E, Pedersen SB, Møller N, Jessen N, Jørgensen JOL. Growth hormone upregulates ANGPTL4 mRNA and suppresses lipoprotein lipase via fatty acids: Randomized experiments in human individuals. Metabolism 2020; 105:154188. [PMID: 32084431 DOI: 10.1016/j.metabol.2020.154188] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/06/2020] [Accepted: 02/17/2020] [Indexed: 01/19/2023]
Abstract
OBJECTIVES Lipoprotein lipase (LPL) catalyzes the hydrolysis of circulating triglycerides into free fatty acids (FFA) and thereby promotes FFA uptake in peripheral tissues. LPL is negatively regulated by angiopoietin-like protein 4 (ANGPTL4) presumably by an FFA-dependent mechanism. Growth hormone (GH) suppresses LPL activity, but it is unknown whether this is mediated by FFA and ANGPTL4. Therefore, we investigated the concerted effect of GH on ANGPTL4 and LPL in the presence and absence of lipolysis in two in vivo studies in human subjects. METHODS In a randomized, placebo-controlled, cross-over study, nine obese men were examined after injection of 1) a GH bolus, and 2) a GH-receptor antagonist followed by four adipose tissue biopsies obtained over a 5-h period. In a second study, nine hypopituitary men were examined in a 2 × 2 factorial design including GH and acipimox (an anti-lipolytic agent), with biopsies from adipose tissue and skeletal muscle obtained during a basal period and a subsequent hyperinsulinemic-euglycemic clamp. The mRNA expression of ANGPTL4 and LPL as well as LPL activity were analyzed in the biopsies. RESULTS In both studies, GH increased serum FFA levels, upregulated ANGPTL4 mRNA expression and suppressed LPL activity. In study 2, acipimox completely suppressed FFA levels and antagonized the effects of GH on ANGPTL4 and LPL. CONCLUSIONS These human in vivo studies demonstrate that GH upregulates ANGPTL4 mRNA and suppresses LPL activity via an FFA-dependent mechanism.
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Affiliation(s)
- Astrid Johannesson Hjelholt
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and internal medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark.
| | - Esben Søndergaard
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and internal medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark; Steno Diabetes Center Aarhus, Aarhus University Hospital, Hedeager 3, 2., 8200 Aarhus N, Denmark
| | - Steen Bønløkke Pedersen
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and internal medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark; Steno Diabetes Center Aarhus, Aarhus University Hospital, Hedeager 3, 2., 8200 Aarhus N, Denmark
| | - Niels Møller
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and internal medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark
| | - Niels Jessen
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Hedeager 3, 2., 8200 Aarhus N, Denmark; Department of Clinical Pharmacology, Aarhus University Hospital, Wilh, Meyers Allé 4, 8000 Aarhus C, Denmark; Department of Biomedicine, Aarhus University, Vennelyst Boulevard 4, 8000 Aarhus C, Denmark
| | - Jens Otto L Jørgensen
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and internal medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark
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Barchuk M, Schreier L, López G, Cevey A, Baldi J, Fernandez Tomé MDC, Goren N, Rubio M, Miksztowicz V, Berg G. Glycosylphosphatidylinositol-anchored high density lipoprotein-binding protein 1 and angiopoietin-like protein 4 are associated with the increase of lipoprotein lipase activity in epicardial adipose tissue from diabetic patients. Atherosclerosis 2019; 288:51-59. [DOI: 10.1016/j.atherosclerosis.2019.06.915] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/27/2019] [Accepted: 06/27/2019] [Indexed: 12/28/2022]
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9
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Sun Y, Xiaoyan H, Yun L, Chaoqun L, Jialing W, Liu Y, Yingqi Z, Peipei Y, Junjun P, Yuanming L. Identification of Key Candidate Genes and Pathways for Relationship between Ovarian Cancer and Diabetes Mellitus Using Bioinformatical Analysis. Asian Pac J Cancer Prev 2019; 20:145-155. [PMID: 30678426 PMCID: PMC6485580 DOI: 10.31557/apjcp.2019.20.1.145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Ovarian cancer is one of the three major gynecologic cancers in the world. The aim of this study is to find the
relationship between ovarian cancer and diabetes mellitus by using the genetic screening technique. By GEO database
query and related online tools of analysis, we analyzed 185 cases of ovarian cancer and 10 control samples from
GSE26712, and a total of 379 different genes were identified, including 104 up-regulated genes and 275 down-regulated
genes. The up-regulated genes were mainly enriched in biological processes, including cell adhesion, transcription of
nucleic acid and biosynthesis, and negative regulation of cell metabolism. The down-regulated genes were enriched in
cell proliferation, migration, angiogenesis and macromolecular metabolism. Protein-protein interaction was analyzed
by network diagram and module synthesis analysis. The top ten hub genes (CDC20, H2AFX, ENO1, ACTB, ISG15,
KAT2B, HNRNPD, YWHAE, GJA1 and CAV1) were identified, which play important roles in critical signaling
pathways that regulate the process of oxidation-reduction reaction and carboxylic acid metabolism. CTD analysis
showed that the hub genes were involved in 1,128 distinct diseases (bonferroni-corrected P<0.05). Further analysis by
drawing the Kaplan-Meier survival curve indicated that CDC20 and ISG15 were statistically significant (P<0.05). In
conclusion, glycometabolism was related to ovarian cancer and genes and proteins in glycometabolism could serve as
potential targets in ovarian cancer treatment.
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Affiliation(s)
- Yi Sun
- Department of Toxicology, Guilin Medical University School of Public Health, Guilin, China.
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Surendran RP, Udayyapan SD, Clemente-Postigo M, Havik SR, Schimmel AWM, Tinahones F, Nieuwdorp M, Dallinga-Thie GM. Decreased GPIHBP1 protein levels in visceral adipose tissue partly underlie the hypertriglyceridemic phenotype in insulin resistance. PLoS One 2018; 13:e0205858. [PMID: 30408040 PMCID: PMC6224034 DOI: 10.1371/journal.pone.0205858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 10/02/2018] [Indexed: 01/29/2023] Open
Abstract
GPIHBP1 is a protein localized at the endothelial cell surface that facilitates triglyceride (TG) lipolysis by binding lipoprotein lipase (LPL). Whether Glycosyl Phosphatidyl Inositol high density lipoprotein binding protein 1 (GPIHBP1) function is impaired and may underlie the hyperTG phenotype observed in type 2 diabetes is not yet established. To elucidate the mechanism underlying impaired TG homeostasis in insulin resistance state we studied the effect of insulin on GPIHBP1 protein expression in human microvascular endothelial cells (HMVEC) under flow conditions. Next, we assessed visceral adipose tissue GPIHBP1 protein expression in type 2 diabetes Leprdb/db mouse model as well as in subjects with ranging levels of insulin resistance. We report that insulin reduces the expression of GPIHBP1 protein in HMVECs. Furthermore, GPIHBP1 protein expression in visceral adipose tissue in Leprdb/db mice is significantly reduced as is the active monomeric form of GPIHBP1 as compared to Leprdb/m mice. A similar decrease in GPIHBP1 protein was observed in subjects with increased body weight. GPIHBP1 protein expression was negatively associated with insulin and HOMA-IR. In conclusion, our data suggest that decreased GPIHBP1 availability in insulin resistant state may hamper peripheral lipolysis capacity.
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Affiliation(s)
- R. Preethi Surendran
- Department of Experimental Vascular Medicine, Amsterdam University Medical Center, location AMC, Amsterdam, The Netherlands
| | - Shanti D. Udayyapan
- Department of Experimental Vascular Medicine, Amsterdam University Medical Center, location AMC, Amsterdam, The Netherlands
| | - Mercedes Clemente-Postigo
- Unidad de Gestión Clínica Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Malaga, Malaga, Spain
- CIBER Fisiopatologia de la Obesidad y Nutrición (CB06/03), Barcelona, Spain
| | - Stefan R. Havik
- Department of Experimental Vascular Medicine, Amsterdam University Medical Center, location AMC, Amsterdam, The Netherlands
| | - Alinda W. M. Schimmel
- Department of Experimental Vascular Medicine, Amsterdam University Medical Center, location AMC, Amsterdam, The Netherlands
| | - Fransisco Tinahones
- Unidad de Gestión Clínica Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Malaga, Malaga, Spain
- CIBER Fisiopatologia de la Obesidad y Nutrición (CB06/03), Barcelona, Spain
| | - Max Nieuwdorp
- Department of Vascular Medicine, Amsterdam University Medical Center, location AMC, Amsterdam, The Netherlands
| | - Geesje M. Dallinga-Thie
- Department of Experimental Vascular Medicine, Amsterdam University Medical Center, location AMC, Amsterdam, The Netherlands
- Unidad de Gestión Clínica Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Malaga, Malaga, Spain
- * E-mail:
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Ryan AS, Ortmeyer HK. Insulin suppression of fatty acid skeletal muscle enzyme activity in postmenopausal women, and improvements in metabolic flexibility and lipoprotein lipase with aerobic exercise and weight loss. Int J Obes (Lond) 2018; 43:276-284. [PMID: 29907844 DOI: 10.1038/s41366-018-0068-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 01/25/2018] [Accepted: 02/14/2018] [Indexed: 12/29/2022]
Abstract
BACKGROUND Obesity and insulin resistance are characterized by metabolic inflexibility, a condition described as an inability to switch from fat oxidation during fasting to carbohydrate oxidation during hyperinsulinemia. The purpose of this study was to examine predictors of metabolic flexibility in 103 obese (37-59% fat), sedentary (VO2max: 19.4 ± 0.5 ml/kg/min), postmenopausal (45-76 years) women, and changes in metabolic flexibility with exercise and weight loss interventions. METHODS Insulin sensitivity (M) and metabolic flexibility via an 80 mU/m2/min hyperinsulinemic-euglycemic clamp, VO2max, and body composition were measured. Metabolic flexibility was measured after 6-months aerobic training + weight loss (AEX + WL: n = 43) or weight loss (WL: n = 31). Basal and insulin-stimulated vastus lateralis skeletal muscle samples were available from a subset of these women (n = 45). RESULTS Metabolic flexibility correlated inversely with glucose120 min of OGTT, fasting insulin, and the percent change (insulin-basal) in lipoprotein lipase (LPL) activity and positively with M, but not with VO2max, total body fat, visceral fat, or subcutaneous abdominal fat. Skeletal muscle acyl-CoA synthase and citrate synthase activities decreased during hyperinsulinemia. Metabolic flexibility increased after AEX + WL but not WL, and the percent change in metabolic flexibility was inversely related to the percent change in insulin's effect on LPL activity. CONCLUSION Metabolic flexibility is related to insulin sensitivity and insulin's action on LPL. Furthermore, metabolic flexibility and insulin suppression of skeletal muscle LPL activity increase with AEX + WL in overweight and obese, sedentary older women.
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Affiliation(s)
- Alice S Ryan
- VA Research Service, VA Maryland Health Care System, Baltimore, MD, 21201, USA. .,Department of Medicine, Division of Gerontology and Geriatric Medicine at the University of Maryland School of Medicine, Baltimore, MD, 21201, USA. .,Baltimore VA, GRECC, Baltimore, MD, 21201, USA.
| | - Heidi K Ortmeyer
- VA Research Service, VA Maryland Health Care System, Baltimore, MD, 21201, USA.,Department of Medicine, Division of Gerontology and Geriatric Medicine at the University of Maryland School of Medicine, Baltimore, MD, 21201, USA.,Baltimore VA, GRECC, Baltimore, MD, 21201, USA
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12
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Sadeghabadi ZA, Nourbakhsh M, Alaee M, Larijani B, Razzaghy-Azar M. Peroxisome proliferator-activated receptor gamma expression in peripheral blood mononuclear cells and angiopoietin-like protein 4 levels in obese children and adolescents. J Endocrinol Invest 2018; 41:241-247. [PMID: 28733963 DOI: 10.1007/s40618-017-0730-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 07/10/2017] [Indexed: 01/20/2023]
Abstract
PURPOSE The peroxisome proliferator-activated receptor γ (PPARγ) is highly expressed in adipose tissue and functions as transcriptional regulator of metabolism and adipocyte differentiation. Angiopoietin-like protein 4 (ANGPTL4), a central player in various aspects of energy homoeostasis, is induced by PPARγ. The aim of this study was to evaluate ANGPTL4 plasma levels and PPARγ gene expression in peripheral blood mononuclear cells (PBMCs) of children and adolescents with obesity and their association with metabolic parameters. METHODS Seventy children and adolescents (35 obese and 35 age- and gender-matched control subjects), were selected. PBMCs were separated and their total RNA was extracted. After cDNA synthesis, PPARG gene expression was analyzed by real-time PCR. Relative differences in gene expression were calculated by ΔCt method using β-actin as a normalizer. Serum ANGPTL4 and insulin were measured using ELISA, and insulin resistance (IR) was calculated by the homeostatic model assessment of insulin resistance (HOMA-IR). Fasting plasma glucose (FPG), triglyceride, total cholesterol, LDL-C and HDL-C were also measured. RESULTS The expression of the PPARG gene as well as the plasma ANGPTL4 levels were significantly diminished in obese subjects as compared to control ones. However, they were not significantly different in obese children with IR compared to obese children without IR or in those with or without metabolic syndrome. A significant positive correlation was found between PPARγ and ANGPTL4 (r = 0.364, p = 0.002). PPARγ expression levels were also significantly correlated with FPG (r = -0.35, p = 0.003). CONCLUSION PPARγ is decreased in childhood obesity and may be responsible for diminished ANGPTL4 levels.
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Affiliation(s)
- Z A Sadeghabadi
- Metabolic Disorders Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - M Nourbakhsh
- Department of Biochemistry, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - M Alaee
- Metabolic Disorders Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - B Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - M Razzaghy-Azar
- Metabolic Disorders Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
- H. Aliasghar Hospital, Iran University of Medical Sciences, Tehran, Iran
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Angiopoietin-Like Proteins in Angiogenesis, Inflammation and Cancer. Int J Mol Sci 2018; 19:ijms19020431. [PMID: 29389861 PMCID: PMC5855653 DOI: 10.3390/ijms19020431] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/24/2018] [Accepted: 01/25/2018] [Indexed: 12/27/2022] Open
Abstract
Altered expression of secreted factors by tumor cells or cells of the tumor microenvironment is a key event in cancer development and progression. In the last decade, emerging evidences supported the autocrine and paracrine activity of the members of the Angiopoietin-like (ANGPTL) protein family in angiogenesis, inflammation and in the regulation of different steps of carcinogenesis and metastasis development. Thus, ANGPTL proteins become attractive either as prognostic or predictive biomarkers, or as novel target for cancer treatment. Here, we outline the current knowledge about the functions of the ANGPTL proteins in angiogenesis, cancer progression and metastasis. Moreover, we discuss the most recent evidences sustaining their role as prognostic or predictive biomarkers for cancer therapy. Although the role of ANGPTL proteins in cancer has not been fully elucidated, increasing evidence suggest their key effects in the proliferative and invasive properties of cancer cells. Moreover, given the common overexpression of ANGPTL proteins in several aggressive solid tumors, and their role in tumor cells and cells of the tumor microenvironment, the field of research about ANGPTL proteins network may highlight new potential targets for the development of future therapeutic strategies.
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Maser RE, Lenhard MJ, Pohlig RT, Balagopal PB. Pre-heparin lipoprotein lipase mass as a potential mediator in the association between adiponectin and HDL-cholesterol in type 2 diabetes. JOURNAL OF CLINICAL AND TRANSLATIONAL ENDOCRINOLOGY 2017; 7:7-11. [PMID: 29067244 PMCID: PMC5651302 DOI: 10.1016/j.jcte.2016.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 12/02/2016] [Accepted: 12/03/2016] [Indexed: 01/25/2023]
Abstract
AIM Lipoprotein lipase (LPL) is a major enzyme in lipid metabolism. Dyslipidemia, characterized by decreased high-density lipoprotein cholesterol (HDL-C), is prevalent in persons with type 2 diabetes mellitus (T2DM). The aim of this study was to determine whether pre-heparin LPL mass mediates the association between adiponectin and HDL-C in individuals with T2DM. METHODS Pre-heparin LPL mass was measured via an enzyme-linked immunosorbent assay, adiponectin by radioimmunoassay, and HDL-C was determined enzymatically. Participants' (n = 50) demographics, HbA1c, adiposity, homeostasis model assessment for insulin resistance (HOMA-IR), serum creatinine, and lipids were measured. Path analysis was utilized to test whether pre-heparin LPL mass is a mediator in the relationship between adiponectin and HDL-C. RESULTS All four criteria for mediation were satisfied in the path analysis. The indirect effect of adiponectin on HDL-C through pre-heparin LPL mass was significant, p = 0.001, whereas the direct effect of adiponectin on HDL-C was not significant, p = 0.074. These results remained consistent even after adjustments for age, gender, body mass index, HOMA-IR, and serum creatinine in the model. CONCLUSION The findings in this study suggest that pre-heparin LPL mass may mediate the association between adiponectin and HDL-C in T2DM. This relationship for measures of HDL-C functionality requires future investigation.
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Affiliation(s)
- Raelene E Maser
- Department of Medical Laboratory Sciences, University of Delaware, Newark, DE 19716, USA.,Diabetes and Metabolic Research Center, Christiana Care Health System, Newark, DE 19713, USA
| | - M James Lenhard
- Diabetes and Metabolic Research Center, Christiana Care Health System, Newark, DE 19713, USA.,Diabetes and Metabolic Diseases Center, Christiana Care Health System, Wilmington, DE 19801, USA
| | - Ryan T Pohlig
- Biostatistics Core Facility, University of Delaware, Newark, DE 19716, USA
| | - P Babu Balagopal
- Biomedical Research & Analysis Laboratory, Nemours Children's Specialty Care & Mayo Clinic College of Medicine, Jacksonville, FL 32207, USA
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15
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Blomquist C, Chorell E, Ryberg M, Mellberg C, Worrsjö E, Makoveichuk E, Larsson C, Lindahl B, Olivecrona G, Olsson T. Decreased lipogenesis-promoting factors in adipose tissue in postmenopausal women with overweight on a Paleolithic-type diet. Eur J Nutr 2017; 57:2877-2886. [PMID: 29075849 PMCID: PMC6267391 DOI: 10.1007/s00394-017-1558-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 10/13/2017] [Indexed: 01/19/2023]
Abstract
Purpose We studied effects of diet-induced postmenopausal weight loss on gene expression and activity of proteins involved in lipogenesis and lipolysis in adipose tissue. Methods Fifty-eight postmenopausal women with overweight (BMI 32.5 ± 5.5) were randomized to eat an ad libitum Paleolithic-type diet (PD) aiming for a high intake of protein and unsaturated fatty acids or a prudent control diet (CD) for 24 months. Anthropometry, plasma adipokines, gene expression of proteins involved in fat metabolism in subcutaneous adipose tissue (SAT) and lipoprotein lipase (LPL) activity and mass in SAT were measured at baseline and after 6 months. LPL mass and activity were also measured after 24 months. Results The PD led to improved insulin sensitivity (P < 0.01) and decreased circulating triglycerides (P < 0.001), lipogenesis-related factors, including LPL mRNA (P < 0.05), mass (P < 0.01), and activity (P < 0.001); as well as gene expressions of CD36 (P < 0.05), fatty acid synthase, FAS (P < 0.001) and diglyceride acyltransferase 2, DGAT2 (P < 0.001). The LPL activity (P < 0.05) and gene expression of DGAT2 (P < 0.05) and FAS (P < 0.05) were significantly lowered in the PD group versus the CD group at 6 months and the LPL activity (P < 0.05) remained significantly lowered in the PD group compared to the CD group at 24 months. Conclusions Compared to the CD, the PD led to a more pronounced reduction of lipogenesis-promoting factors in SAT among postmenopausal women with overweight. This could have mediated the favorable metabolic effects of the PD on triglyceride levels and insulin sensitivity.
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Affiliation(s)
- Caroline Blomquist
- Department of Public Health and Clinical Medicine, Medicine, Umeå University, By 6M, M31, SE-901 87, Umeå, Sweden.
| | - Elin Chorell
- Department of Public Health and Clinical Medicine, Medicine, Umeå University, By 6M, M31, SE-901 87, Umeå, Sweden
| | - Mats Ryberg
- Department of Public Health and Clinical Medicine, Medicine, Umeå University, By 6M, M31, SE-901 87, Umeå, Sweden
| | - Caroline Mellberg
- Department of Public Health and Clinical Medicine, Medicine, Umeå University, By 6M, M31, SE-901 87, Umeå, Sweden
| | - Evelina Worrsjö
- Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden
| | - Elena Makoveichuk
- Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden
| | - Christel Larsson
- Department of Food and Nutrition and Sport Science, University of Gothenburg, Gothenburg, Sweden
| | - Bernt Lindahl
- Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden
| | | | - Tommy Olsson
- Department of Public Health and Clinical Medicine, Medicine, Umeå University, By 6M, M31, SE-901 87, Umeå, Sweden
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16
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Castellano-Castillo D, Moreno-Indias I, Fernández-García JC, Alcaide-Torres J, Moreno-Santos I, Ocaña L, Gluckman E, Tinahones F, Queipo-Ortuño MI, Cardona F. Adipose Tissue LPL Methylation is Associated with Triglyceride Concentrations in the Metabolic Syndrome. Clin Chem 2017; 64:210-218. [PMID: 29046332 DOI: 10.1373/clinchem.2017.277921] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 09/12/2017] [Indexed: 02/03/2023]
Abstract
BACKGROUND DNA methylation is one of the epigenetic mechanisms that regulate gene expression. DNA methylation may be modified by environmental and nutritional factors. Thus, epigenetics could potentially provide a mechanism to explain the etiology of metabolic disorders, such as metabolic syndrome (MetS). The aim of this study was to analyze the level of DNA methylation of several lipoprotein lipase (LPL)-promoter-CpG dinucleotides in a CpG island region and relate this to the gene and protein expression levels in human visceral adipose tissue (VAT) from individuals with and without MetS. METHODS VAT samples were collected from laparoscopic surgical patients without and with MetS, and levels of LPL mRNA, LPL protein, and LPL DNA methylation were measured by qPCR, western blot, and pyrosequencing. Biochemical and anthropometric variables were analyzed. Individuals included in a subset underwent a dietary fat challenge test, and levels of postprandial triglycerides were determined. RESULTS We found higher levels of DNA methylation in MetS patients but lower gene expression and protein levels. There was a negative association between LPL methylation and LPL gene expression. We found a positive association between LPL methylation status and abnormalities of the metabolic profile and basal and postprandial triglycerides, whereas LPL gene expression was negatively associated with these abnormalities. CONCLUSIONS We demonstrate that LPL methylation may be influenced by the degree of metabolic disturbances and could be involved in triglyceride metabolism, promoting hypertriglyceridemia and subsequent associated disorders, such as MetS.
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Affiliation(s)
- Daniel Castellano-Castillo
- Unidad de Gestión Clínica de Endocrinología y Nutrición del Hospital Virgen de la Victoria, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Madrid, Spain
| | - Isabel Moreno-Indias
- Unidad de Gestión Clínica de Endocrinología y Nutrición del Hospital Virgen de la Victoria, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Madrid, Spain
| | - José Carlos Fernández-García
- Unidad de Gestión Clínica de Endocrinología y Nutrición del Hospital Virgen de la Victoria, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Madrid, Spain
| | - Juan Alcaide-Torres
- Unidad de Gestión Clínica de Endocrinología y Nutrición del Hospital Virgen de la Victoria, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Madrid, Spain
| | - Inmaculada Moreno-Santos
- Unidad de Gestión Clínica Área del Corazón, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Clínico Virgen de la Victoria, Universidad de Málaga, Red de Investigación Cardiovascular (RIC), Málaga, Spain
| | - Luis Ocaña
- Unidad de Cirugía Metabólica, Hospital Clínico Virgen de la Victoria, Málaga, Spain
| | - Enrique Gluckman
- Unidad de Cirugía Metabólica, Hospital Clínico Virgen de la Victoria, Málaga, Spain
| | - Francisco Tinahones
- Unidad de Gestión Clínica de Endocrinología y Nutrición del Hospital Virgen de la Victoria, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Madrid, Spain
| | - María Isabel Queipo-Ortuño
- Unidad de Gestión Clínica de Endocrinología y Nutrición del Hospital Virgen de la Victoria, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, Spain; .,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Madrid, Spain
| | - Fernando Cardona
- Unidad de Gestión Clínica de Endocrinología y Nutrición del Hospital Virgen de la Victoria, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, Spain.,Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Madrid, Spain
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17
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Ingerslev B, Hansen JS, Hoffmann C, Clemmesen JO, Secher NH, Scheler M, Hrabĕ de Angelis M, Häring HU, Pedersen BK, Weigert C, Plomgaard P. Angiopoietin-like protein 4 is an exercise-induced hepatokine in humans, regulated by glucagon and cAMP. Mol Metab 2017; 6:1286-1295. [PMID: 29031727 PMCID: PMC5641605 DOI: 10.1016/j.molmet.2017.06.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 05/30/2017] [Accepted: 06/01/2017] [Indexed: 12/03/2022] Open
Abstract
Objective Angiopoietin-like protein-4 (ANGPTL4) is a circulating protein that is highly expressed in liver and implicated in regulation of plasma triglyceride levels. Systemic ANGPTL4 increases during prolonged fasting and is suggested to be secreted from skeletal muscle following exercise. Methods We investigated the origin of exercise-induced ANGPTL4 in humans by measuring the arterial-to-venous difference over the leg and the hepato-splanchnic bed during an acute bout of exercise. Furthermore, the impact of the glucagon-to-insulin ratio on plasma ANGPTL4 was studied in healthy individuals. The regulation of ANGPTL4 was investigated in both hepatic and muscle cells. Results The hepato-splanchnic bed, but not the leg, contributed to exercise-induced plasma ANGPTL4. Further studies using hormone infusions revealed that the glucagon-to-insulin ratio is an important regulator of plasma ANGPTL4 as elevated glucagon in the absence of elevated insulin increased plasma ANGPTL4 in resting subjects, whereas infusion of somatostatin during exercise blunted the increase of both glucagon and ANGPTL4. Moreover, activation of the cAMP/PKA signaling cascade let to an increase in ANGPTL4 mRNA levels in hepatic cells, which was prevented by inhibition of PKA. In humans, muscle ANGPTL4 mRNA increased during fasting, with only a marginal further induction by exercise. In human muscle cells, no inhibitory effect of AMPK activation could be demonstrated on ANGPTL4 expression. Conclusions The data suggest that exercise-induced ANGPTL4 is secreted from the liver and driven by a glucagon-cAMP-PKA pathway in humans. These findings link the liver, insulin/glucagon, and lipid metabolism together, which could implicate a role of ANGPTL4 in metabolic diseases. Release of Angiopoietin-like Protein 4 from the hepato-splanchnic bed is induced by exercise. It is regulated by the glucagon-to-insulin ratio in vivo in humans. In vitro in hepatocytes Angiopoietin-like Protein 4 is stimulated by cAMP. Angiopoietin-like Protein 4 is not released from the exercising nor resting leg.
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Affiliation(s)
- Bodil Ingerslev
- The Centre of Inflammation and Metabolism, The Centre for Physical Activity Research, Rigshospitalet, Copenhagen University Hospital, Denmark
| | - Jakob S Hansen
- The Centre of Inflammation and Metabolism, The Centre for Physical Activity Research, Rigshospitalet, Copenhagen University Hospital, Denmark; Department of Clinical Biochemistry, Rigshospitalet, Copenhagen University Hospital, Denmark
| | - Christoph Hoffmann
- Division of Endocrinology, Diabetology, Angiology, Nephrology, Pathobiochemistry and Clinical Chemistry, Department of Internal Medicine IV, University of Tuebingen, Germany
| | - Jens O Clemmesen
- Department of Hepatology, Rigshospitalet, Copenhagen University Hospital, Denmark
| | - Niels H Secher
- Department of Anaesthesiology, The Copenhagen Muscle Research Centre, Rigshospitalet, Copenhagen University Hospital, Denmark
| | - Mika Scheler
- Institute of Experimental Genetics, Helmholtz Center Munich, German Research Center for Enviromental Health Neuherberg, Germany; German Center for Diabetes Research (DZD), Germany
| | - Martin Hrabĕ de Angelis
- Institute of Experimental Genetics, Helmholtz Center Munich, German Research Center for Enviromental Health Neuherberg, Germany; German Center for Diabetes Research (DZD), Germany; Center of Life and Food Sciences Weihenstephan, Technical University Munich, Freising-Weihenstephan, Germany
| | - Hans U Häring
- Division of Endocrinology, Diabetology, Angiology, Nephrology, Pathobiochemistry and Clinical Chemistry, Department of Internal Medicine IV, University of Tuebingen, Germany; German Center for Diabetes Research (DZD), Germany; Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tuebingen, Tuebingen, Germany
| | - Bente K Pedersen
- The Centre of Inflammation and Metabolism, The Centre for Physical Activity Research, Rigshospitalet, Copenhagen University Hospital, Denmark
| | - Cora Weigert
- Division of Endocrinology, Diabetology, Angiology, Nephrology, Pathobiochemistry and Clinical Chemistry, Department of Internal Medicine IV, University of Tuebingen, Germany; German Center for Diabetes Research (DZD), Germany; Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tuebingen, Tuebingen, Germany
| | - Peter Plomgaard
- The Centre of Inflammation and Metabolism, The Centre for Physical Activity Research, Rigshospitalet, Copenhagen University Hospital, Denmark; Department of Clinical Biochemistry, Rigshospitalet, Copenhagen University Hospital, Denmark.
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18
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TNF-α decreases lipoprotein lipase activity in 3T3-L1 adipocytes by up-regulation of angiopoietin-like protein 4. Biochim Biophys Acta Mol Cell Biol Lipids 2017; 1862:533-540. [DOI: 10.1016/j.bbalip.2017.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 01/22/2017] [Accepted: 02/10/2017] [Indexed: 12/12/2022]
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19
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Makoveichuk E, Ruge T, Nilsson S, Södergren A, Olivecrona G. High Concentrations of Angiopoietin-Like Protein 4 Detected in Serum from Patients with Rheumatoid Arthritis Can Be Explained by Non-Specific Antibody Reactivity. PLoS One 2017; 12:e0168922. [PMID: 28107351 PMCID: PMC5249215 DOI: 10.1371/journal.pone.0168922] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 12/08/2016] [Indexed: 11/19/2022] Open
Abstract
Angiopoietin-like protein 4 (ANGPTL4) is suggested to be a master regulator of plasma triglyceride metabolism. Our aim was to study whether the previously reported high levels of ANGPTL4 detected in serum from patients with rheumatoid arthritis (RA) by ELISA was due to any specific molecular form of this protein (oligomers, monomers or fragments). ANGPTL4 levels were first determined in serum from 68 RA patients and 43 age and sex matched control subjects and the mean values differed by a factor of 5.0. Then, ANGPTL4 was analyzed after size exclusion chromatography (SEC) of serum samples. With serum from one of the RA patients with high levels of ANGPTL4, the dominant reactivity was found in fractions corresponding to high-molecular weight proteins. In addition, a minor peak of reactivity eluting late from the column was found both in the patient and in controls. By the use of HeteroBlock®, and by careful selection of antibodies, we documented non-specific reactions for ANGPTL4 in 39% of samples from the RA patients, most likely due to cross-reactivity of the antibodies with rheumatoid factor (RF). The corresponding figure for control subjects was 6.3%. After corrections for non-specific reactions, the mean level of ANGPTL4 in serum from RA patients was still significantly higher than in control individuals (mean levels were 101±62 and 67±39 ng/ml respectively, P = 0.02). We re-analyzed samples from our previously published studies on ANGPL4 levels in patients on hemodialysis and patients with diabetes type 2. These samples did not show false positive reactions. The levels of ANGPTL4 were comparable to those detected previously.
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Affiliation(s)
- Elena Makoveichuk
- Department of Medical Biosciences/Physiological Chemistry, Umeå University, Umeå, Sweden
| | - Toralph Ruge
- Department of Surgery and Perioperative Sciences/Acute Medicine, Umeå University, Umeå Sweden
| | - Solveig Nilsson
- Department of Medical Biosciences/Physiological Chemistry, Umeå University, Umeå, Sweden
| | - Anna Södergren
- Department of Public Health and Clinical Medicine/Rheumatology, Umeå University, Umeå, Sweden
| | - Gunilla Olivecrona
- Department of Medical Biosciences/Physiological Chemistry, Umeå University, Umeå, Sweden
- * E-mail:
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20
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La Paglia L, Listì A, Caruso S, Amodeo V, Passiglia F, Bazan V, Fanale D. Potential Role of ANGPTL4 in the Cross Talk between Metabolism and Cancer through PPAR Signaling Pathway. PPAR Res 2017; 2017:8187235. [PMID: 28182091 PMCID: PMC5274667 DOI: 10.1155/2017/8187235] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 12/19/2016] [Indexed: 02/07/2023] Open
Abstract
The angiopoietin-like 4 (ANGPTL4) protein belongs to a superfamily of secreted proteins structurally related to factors modulating angiogenesis known as angiopoietins. At first, ANGPTL4 has been identified as an adipokine exclusively involved in lipid metabolism, because of its prevalent expression in liver and adipose tissue. This protein regulates lipid metabolism by inhibiting lipoprotein lipase (LPL) activity and stimulating lipolysis of white adipose tissue (WAT), resulting in increased levels of plasma triglycerides (TG) and fatty acids. Subsequently, ANGPTL4 has been shown to be involved in several nonmetabolic and metabolic conditions, both physiological and pathological, including angiogenesis and vascular permeability, cell differentiation, tumorigenesis, glucose homoeostasis, lipid metabolism, energy homeostasis, wound healing, inflammation, and redox regulation. The transcriptional regulation of ANGPTL4 can be modulated by several transcription factors, including PPARα, PPARβ/δ, PPARγ, and HIF-1α, and nutritional and hormonal conditions. Several studies showed that high levels of ANGPTL4 are associated with poor prognosis in patients with various solid tumors, suggesting an important role in cancer onset and progression, metastasis, and anoikis resistance. Here, we have discussed the potential role of ANGPTL4 in mediating the cross talk between metabolic syndromes, such as diabetes and obesity, and cancer through regulation of its expression by PPARs.
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Affiliation(s)
- Laura La Paglia
- ICAR-CNR, National Research Council of Italy, 90146 Palermo, Italy
| | - Angela Listì
- Department of Surgical, Oncological and Oral Sciences, Section of Medical Oncology, University of Palermo, 90127 Palermo, Italy
| | - Stefano Caruso
- Génomique Fonctionnelle des Tumeurs Solides, INSERM, UMR 1162, 75010 Paris, France
| | - Valeria Amodeo
- Samantha Dickson Brain Cancer Unit, UCL Cancer Institute, University College London, London WC1E 6DD, UK
| | - Francesco Passiglia
- Department of Surgical, Oncological and Oral Sciences, Section of Medical Oncology, University of Palermo, 90127 Palermo, Italy
| | - Viviana Bazan
- Department of Surgical, Oncological and Oral Sciences, Section of Medical Oncology, University of Palermo, 90127 Palermo, Italy
| | - Daniele Fanale
- Department of Surgical, Oncological and Oral Sciences, Section of Medical Oncology, University of Palermo, 90127 Palermo, Italy
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El Kabbaoui M, Chda A, Azdad O, Mejrhit N, Aarab L, Bencheikh R, Tazi A. Evaluation of hypoglycemic and hypolipidemic activities of aqueous extract of Cistus ladaniferus in streptozotocin-induced diabetic rats. Asian Pac J Trop Biomed 2016. [DOI: 10.1016/j.apjtb.2016.09.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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22
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Huang CW, Chien YS, Chen YJ, Ajuwon KM, Mersmann HM, Ding ST. Role of n-3 Polyunsaturated Fatty Acids in Ameliorating the Obesity-Induced Metabolic Syndrome in Animal Models and Humans. Int J Mol Sci 2016; 17:ijms17101689. [PMID: 27735847 PMCID: PMC5085721 DOI: 10.3390/ijms17101689] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 09/05/2016] [Accepted: 09/27/2016] [Indexed: 02/07/2023] Open
Abstract
The incidence of obesity and its comorbidities, such as insulin resistance and type II diabetes, are increasing dramatically, perhaps caused by the change in the fatty acid composition of common human diets. Adipose tissue plays a role as the major energy reservoir in the body. An excess of adipose mass accumulation caused by chronic positive energy balance results in obesity. The n-3 polyunsaturated fatty acids (n-3 PUFA), DHA (docosahexaenoic acid) and EPA (eicosapentaenoic acid) exert numerous beneficial effects to maintain physiological homeostasis. In the current review, the physiology of n-3 PUFA effects in the body is delineated from studies conducted in both human and animal experiments. Although mechanistic studies in human are limited, numerous studies conducted in animals and models in vitro provide potential molecular mechanisms of the effects of these fatty acids. Three aspects of n-3 PUFA in adipocyte regulation are discussed: (1) lipid metabolism, including adipocyte differentiation, lipolysis and lipogenesis; (2) energy expenditure, such as mitochondrial and peroxisomal fatty acid β-oxidation; and (3) inflammation, including adipokines and specialized pro-resolving lipid mediators. Additionally, the mechanisms by which n-3 PUFA regulate gene expression are highlighted. The beneficial effects of n-3 PUFA may help to reduce the incidence of obesity and its comorbidities.
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Affiliation(s)
- Chao-Wei Huang
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan.
| | - Yi-Shan Chien
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan.
| | - Yu-Jen Chen
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan.
| | - Kolapo M Ajuwon
- Department of Animal Science, Purdue University, West Lafayette, IN 47907-2054, USA.
| | - Harry M Mersmann
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan.
| | - Shih-Torng Ding
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan.
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan.
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Frenzel E, Wrenger S, Brügger B, Salipalli S, Immenschuh S, Aggarwal N, Lichtinghagen R, Mahadeva R, Marcondes AMQ, Dinarello CA, Welte T, Janciauskiene S. α1-Antitrypsin Combines with Plasma Fatty Acids and Induces Angiopoietin-like Protein 4 Expression. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2015; 195:3605-16. [PMID: 26363050 PMCID: PMC6232844 DOI: 10.4049/jimmunol.1500740] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 08/06/2015] [Indexed: 11/19/2022]
Abstract
α1-Antitrypsin (A1AT) purified from human plasma upregulates expression and release of angiopoietin-like protein 4 (Angptl4) in adherent human blood monocytes and in human lung microvascular endothelial cells, providing a mechanism for the broad immune-regulatory properties of A1AT independent of its antiprotease activity. In this study, we demonstrate that A1AT (Prolastin), a potent inducer of Angptl4, contains significant quantities of the fatty acids (FA) linoleic acid (C18:2) and oleic acid (C18:1). However, only trace amounts of FAs were present in preparations that failed to increase Angplt4 expression, for example, A1AT (Zemaira) or M-type A1AT purified by affinity chromatography. FA pull-down assays with Western blot analysis revealed a FA-binding ability of A1AT. In human blood-adherent monocytes, A1AT-FA conjugates upregulated expression of Angptl4 (54.9-fold, p < 0.001), FA-binding protein 4 (FABP4) (11.4-fold, p < 0.001), and, to a lesser degree, FA translocase (CD36) (3.1-fold, p < 0.001) relative to A1AT devoid of FA (A1AT-0). These latter effects of A1AT-FA were blocked by inhibitors of peroxisome proliferator-activated receptor (PPAR) β/δ (ST247) and PPARγ (GW9662). When compared with controls, cell pretreatment with ST247 diminished the effect of A1AT-LA on Angptl4 mRNA (11.6- versus 4.1-fold, p < 0.001) and FABP4 mRNA (5.4- versus 2.8-fold, p < 0.001). Similarly, preincubation of cells with GW9662 inhibited inducing effect of A1AT-LA on Angptl4 mRNA (by 2-fold, p < 0.001) and FABP4 mRNA (by 3-fold, p < 0.001). Thus, A1AT binds to FA, and it is this form of A1AT that induces Angptl4 and FABP4 expression via a PPAR-dependent pathway. These findings provide a mechanism for the unexplored area of A1AT biology independent of its antiprotease properties.
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Affiliation(s)
- Eileen Frenzel
- Department of Respiratory Medicine, Hannover Medical School, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover, Member of the German Center for Lung Research, 30626 Hannover, Germany
| | - Sabine Wrenger
- Department of Respiratory Medicine, Hannover Medical School, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover, Member of the German Center for Lung Research, 30626 Hannover, Germany
| | - Britta Brügger
- Biochemistry Center, Heidelberg University, 69120 Heidelberg, Germany
| | - Sandeep Salipalli
- Department of Respiratory Medicine, Hannover Medical School, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover, Member of the German Center for Lung Research, 30626 Hannover, Germany
| | - Stephan Immenschuh
- Institute for Transfusion Medicine, Hannover Medical School, 30625 Hannover, Germany
| | - Nupur Aggarwal
- Department of Respiratory Medicine, Hannover Medical School, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover, Member of the German Center for Lung Research, 30626 Hannover, Germany
| | - Ralf Lichtinghagen
- Institute of Clinical Chemistry, Hannover Medical School, 30625 Hannover, Germany
| | - Ravi Mahadeva
- Department of Respiratory Medicine, University of Cambridge, Cambridge CB2 0QQ, United Kingdom
| | - A Mario Q Marcondes
- Department of Medicine, University of Washington, Seattle, WA 98195; Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Charles A Dinarello
- Department of Medicine, University of Colorado Denver, Aurora, CO 80045; and Department of Medicine, Radboud University Medical Centre, Nijmegen 30625, the Netherlands
| | - Tobias Welte
- Department of Respiratory Medicine, Hannover Medical School, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover, Member of the German Center for Lung Research, 30626 Hannover, Germany
| | - Sabina Janciauskiene
- Department of Respiratory Medicine, Hannover Medical School, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover, Member of the German Center for Lung Research, 30626 Hannover, Germany;
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Skoczyńska A. Postprandial decrease in LDL-cholesterol in men with metabolic syndrome. Open Med (Wars) 2015; 10:138-151. [PMID: 28352689 PMCID: PMC5153088 DOI: 10.1515/med-2015-0025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Accepted: 03/31/2014] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND In some epidemiological studies, blood lipids are determined at non-fasting state, which may impact cardiovascular risk estimation. The aim of this study was to evaluate postprandial LDL-C changes in men with newly diagnosed metabolic syndrome (MetSy). METHODS 36 male patients were examined: 12 men with and 24 men without MetSy. The fat tolerance test was performed before and after a three-month hypolipidemic treatment. Serum lipids were measured using routine methods, lipid peroxides (LPO) colorimetrically, apolipoproteins A-I, B, and hsCRP immunoturbidimetrically. RESULTS The postprandial increase in triglycerides was associated with a decrease in LDL-C and a small decrease in apo B. In men with MetSy, the mean change in LDL-C (-19.5 ± 2.3 mg/dl) was greater than in healthy men (-5.7 ± 3.8 mg/dl). All lipid changes (ΔTG, ΔLDL-C and ΔLPO) were linearly dependent on the postprandial non-LDL-cholesterol. After three months of hypolipidemic treatment, in all men with MetSy, the apoB/apoA-I ratio remained the same as before the therapy. CONCLUSION In men diagnosed with MetSy, postprandial decreases in LDL-cholesterol may cause underestimation of cardiovascular risk. After three months of hypolipidemic treatment, there was only a partial reduction in this risk, as the apoB/apoA-I ratio remained the same.
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Response of Angiopoietin-like Proteins 3 and 4 to Hemodialysis. Int J Artif Organs 2014; 37:13-20. [DOI: 10.5301/ijao.5000252] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/22/2013] [Indexed: 11/20/2022]
Abstract
Background/Aim Patients on chronic hemodialysis (cHD) have decreased activity of lipoprotein lipase (LPL). Angiopoietin-like proteins (ANGPTL) 3 and 4 have been shown to inactivate LPL. The aim of this study was to investigate the levels of the ANGPTLs in plasma of cHD-patients and to evaluate if cHD may alter these levels. Material and methods Baseline data were collected from cHD patients (n = 23), and controls (n = 23) and samples were analyzed from 17 patients during low-flux or high-flux HD, and from ultrafiltrate (n = 5). The levels of ANGPTL3 and 4, LPL and triglycerides were studied in a cross-over design on cHD with local citrate compared to tinzaparin as anticoagulant. Results The level of ANGPTL3 was higher than ANGPTL4 in patients and controls (p<0.01); the ANGPTL3 was 2.0 and ANGPTL4 was 3.3-fold higher in cHD versus controls. The levels of ANGPTL4 increased during cHD. After 180 min of HD the values had decreased again. When the dialysis was performed with high-flux filter, the mean level of ANGPTL4 at 180 min was below the value observed before cHD (p = 0.003). There was immunoreaction for ANGPTL4 in UFs when using high-flux, but not with low-flux, filter. ANGPTL3 was not detectable in UF. On cHD with citrate, no LPL activity was released into the blood Conclusions ANGPTL3 and ANGPTL4 were increased in HD patients. Anticoagulation with tinzaparin during cHD causes release of ANGPTL4 from tissues into blood. cHD using high-flux filters, to some extent, removed ANGPTL4. With citrate the levels of ANGPTL4 decreased.
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Abstract
Angiopoietin-like proteins (ANGPTLs) are a family of proteins structurally similar to the angiopoietins. To date, eight ANGPTLs have been discovered, namely ANGPTL1 to ANGPTL8. Emerging evidence implies a key role for ANGPTLs in the regulation of a plethora of physiological and pathophysiological processes. Most of the ANGPTLs exhibit multibiological properties, including established functional roles in lipid and glucose metabolism, inflammation, hematopoiesis, and cancer. This report represents a systematic and updated appraisal of this class of proteins, focusing on the main features of each ANGPTL.
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Affiliation(s)
- Gaetano Santulli
- Department of Advanced Biomedical Sciences, University of Naples “Federico II”, Naples, Italy
- College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
- *Correspondence: Gaetano Santulli, College of Physicians and Surgeons, Columbia University Medical Center, St. Nicholas Avenue, RB-5-513, Manhattan, NY 10032, USA e-mail:
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Makoveichuk E, Vorrsjö E, Olivecrona T, Olivecrona G. Inactivation of lipoprotein lipase in 3T3-L1 adipocytes by angiopoietin-like protein 4 requires that both proteins have reached the cell surface. Biochem Biophys Res Commun 2013; 441:941-6. [DOI: 10.1016/j.bbrc.2013.11.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 11/01/2013] [Indexed: 01/25/2023]
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Brands M, Sauerwein HP, Ackermans MT, Kersten S, Serlie MJ. Omega-3 long-chain fatty acids strongly induce angiopoietin-like 4 in humans. J Lipid Res 2013; 54:615-621. [PMID: 23319744 PMCID: PMC3617937 DOI: 10.1194/jlr.m030049] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 01/12/2013] [Indexed: 01/08/2023] Open
Abstract
Angiopoietin-like 4 (ANGPTL4) is a regulator of LPL activity. In this study we examined whether different fatty acids have a differential effect on plasma ANGPTL4 levels during hyperinsulinemia in healthy lean males. In 10 healthy lean males, 3 hyperinsulinemic euglycemic clamps were performed during concomitant 6 h intravenous infusion of soybean oil (Intralipid® rich in PUFA), olive oil (Clinoleic® rich in MUFA) and control saline. In 10 other healthy lean males, 2 hyperinsulinemic clamps were performed during infusion of a mixed lipid emulsion containing a mixture of fish oil (FO), medium-chain triglycerides (MCTs), and long-chain triglycerides (LCTs) (FO/MCT/LCT; SMOFlipid®) or saline. FFA levels of approximately 0.5 mmol/l were reached during each lipid infusion. Plasma ANGPTL4 decreased during hyperinsulinemia by 32% (18-52%) from baseline. This insulin-mediated decrease in ANGPTL4 concentrations was partially reduced during concomitant infusion of olive oil and completely blunted during concomitant infusion of soybean oil and FO/MCT/LCT. The reduction in insulin sensitivity was similar between all lipid infusions. In accordance, incubation of rat hepatoma cells with the polyunsaturated fatty acid C22:6 increased ANGPTL4 expression by 70-fold, compared with 27-fold by the polyunsaturated fatty acid C18:2, and 15-fold by the monounsaturated fatty acid C18:1. These results suggest that ANGPTL4 is strongly regulated by fatty acids in humans, and is also dependent on the type of fatty acid.
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Affiliation(s)
- Myrte Brands
- Department of Endocrinology and Metabolism, Laboratory of Endocrinology, Academic Medical Center, Amsterdam, The Netherlands
| | - Hans P. Sauerwein
- Department of Endocrinology and Metabolism, Laboratory of Endocrinology, Academic Medical Center, Amsterdam, The Netherlands
| | - Mariette T. Ackermans
- Department of Clinical Chemistry, Laboratory of Endocrinology, Academic Medical Center, Amsterdam, The Netherlands
| | - Sander Kersten
- Nutrition, Metabolism, and Genomics Group, Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands
| | - Mireille J. Serlie
- Department of Endocrinology and Metabolism, Laboratory of Endocrinology, Academic Medical Center, Amsterdam, The Netherlands
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Jonker JT, Smit JWA, Hammer S, Snel M, van der Meer RW, Lamb HJ, Mattijssen F, Mudde K, Jazet IM, Dekkers OM, de Roos A, Romijn JA, Kersten S, Rensen PCN. Dietary modulation of plasma angiopoietin-like protein 4 concentrations in healthy volunteers and in patients with type 2 diabetes. Am J Clin Nutr 2013; 97:255-60. [PMID: 23283507 DOI: 10.3945/ajcn.112.043687] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Angiopoietin-like protein 4 (ANGPTL4) has been identified as an inhibitor of lipoprotein lipase. Preliminary data suggest that plasma nonesterified fatty acids (NEFAs) raise plasma ANGPTL4 concentrations in humans. OBJECTIVE The objective was to assess plasma ANGPTL4 concentrations after various nutritional interventions that increase NEFA concentrations in healthy subjects and in patients with type 2 diabetes mellitus. DESIGN We studied 4 groups, both at baseline and after 3 d of either fasting (n = 22 healthy men), a very-low-calorie diet (VLCD; n = 10 healthy men and n = 10 patients with diabetes), or a high-fat, high-energy diet (HFED; n = 15 healthy men). Plasma ANGPTL4, NEFA, and triglyceride concentrations were measured. RESULTS In healthy men, a VLCD increased ANGPTL4 from 13.2 (IQR: 8.1-24.2) at baseline to 18.2 (16.7-33.4) ng/mL (P < 0.05), fasting increased ANGPTL4 from 10.6 (7.6-17.6) to 28.0 (23.1-35.0) ng/mL (P < 0.05), and an HFED increased ANGPTL4 from 13.9 (8.2-22.0) to 17.2 (11.2-23.6) ng/mL (P < 0.05). In men with diabetes, a VLCD also increased ANGPTL4, from 10.9 ± 2.4 to 19.2 ± 3.2 ng/mL (P < 0.05). All interventions significantly increased plasma NEFAs in both healthy men and patients with diabetes. The change in ANGPTL4 positively correlated with the change in NEFA concentrations (β = 0.048, P < 0.001) and negatively correlated with the change in plasma triglycerides (β = -0.051, P = 0.01). CONCLUSIONS Three days of either fasting, a VLCD, or an HFED increased plasma ANGPTL4 concentrations in healthy men, concomitantly with increased plasma NEFA concentrations. Similarly, a VLCD in patients with diabetes increased ANGPTL4 concentrations, concomitantly with increased NEFA concentrations.
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Affiliation(s)
- Jacqueline T Jonker
- Departments of Endocrinology and Metabolic Diseases, Leiden University Medical Center, Leiden, Netherlands
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Pereira MJ, Palming J, Rizell M, Aureliano M, Carvalho E, Svensson MK, Eriksson JW. The immunosuppressive agents rapamycin, cyclosporin A and tacrolimus increase lipolysis, inhibit lipid storage and alter expression of genes involved in lipid metabolism in human adipose tissue. Mol Cell Endocrinol 2013; 365:260-9. [PMID: 23160140 DOI: 10.1016/j.mce.2012.10.030] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 10/15/2012] [Accepted: 10/30/2012] [Indexed: 02/07/2023]
Abstract
Cyclosporin A (CsA), tacrolimus and rapamycin are immunosuppressive agents (IAs) associated with insulin resistance and dyslipidemia, although their molecular effects on lipid metabolism in adipose tissue are unknown. We explored IAs effects on lipolysis, lipid storage and expression of genes involved on lipid metabolism in isolated human adipocytes and/or adipose tissue obtained via subcutaneous and omental fat biopsies. CsA, tacrolimus and rapamycin increased isoproterenol-stimulated lipolysis and inhibited lipid storage by 20-35% and enhanced isoproterenol-stimulated hormone-sensitive lipase Ser552 phosphorylation. Rapamycin also increased basal lipolysis (~20%) and impaired insulin's antilipolytic effect. Rapamycin, down-regulated the gene expression of perilipin, sterol regulatory element-binding protein 1 (SREBP1) and lipin 1, while tacrolimus down-regulated CD36 and aP2 gene expression. All three IAs increased IL-6 gene expression and secretion, but not expression and secretion of TNF-α or adiponectin. These findings suggest that CsA, tacrolimus and rapamycin enhance lipolysis, inhibit lipid storage and expression of lipogenic genes in adipose tissue, which may contribute to the development of dyslipidemia and insulin resistance associated with immunosuppressive therapy.
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Affiliation(s)
- Maria J Pereira
- The Lundberg Laboratory for Diabetes Research, Department of Molecular and Clinical Medicine, The Sahlgrenska Academy at University of Gothenburg, 413 45 Gothenburg, Sweden.
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Simplified analysis of lipoprotein lipase activity: Evaluation of lipasemic activity of low molecular weight heparin in rats. Arch Pharm Res 2012; 35:1107-14. [DOI: 10.1007/s12272-012-0619-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 03/15/2012] [Accepted: 03/22/2012] [Indexed: 11/25/2022]
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Nutritional regulation of adipose tissue lipoprotein lipase is blunted in insulin resistant rats. Open Life Sci 2012. [DOI: 10.2478/s11535-012-0002-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
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