1
|
Boulet MM, Cheillan D, Di Filippo M, Buisson C, Michalski MC, Moulin P, Calzada C. Large triglyceride-rich lipoproteins from fasting patients with type 2 diabetes activate platelets. Diabetes Metab 2019; 46:54-60. [PMID: 30981822 DOI: 10.1016/j.diabet.2019.03.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/25/2019] [Accepted: 03/30/2019] [Indexed: 01/06/2023]
Abstract
AIMS Type 2 diabetes (T2D) patients present with risk factors for atherothrombosis such as fasting hypertriglyceridaemia and platelet hyperactivity. Our study objective was to determine the effect of large triglyceride-rich lipoproteins (TGRL) from fasting T2D patients on platelet aggregation and, if any, to identify the signaling pathway involved. METHODS Large TGRL were isolated from the plasma of 25 T2D patients by ultracentrifugation (density < 1.000 g/mL). Platelets were isolated from healthy blood donors (HBD) and suspended in buffer, then preincubated in the presence or absence of TGRL and stimulated with either collagen or thrombin. Platelet aggregation and the arachidonic acid (AA) signaling pathway were studied. RESULTS Fasting T2D large TGRL were mostly of hepatic origin (apoB100/apoB48 ratio: 42 ± 7) and rich in triglycerides (TG/total apoB ratio: 4.2 ± 0.5), and able to potentiate agonist-stimulated platelet aggregation (collagen: +68%, P < 0.05; thrombin: +771%, P < 0.05). It should also be mentioned that TGRL from the plasma of HBD (n = 7) had no effect on platelet aggregation. In addition, T2D large TGRL increased thromboxane B2 (TxB2) concentration in platelets stimulated with either collagen (+34%, P < 0.05) or thrombin (+37%, P < 0.05) compared with platelets stimulated with either of these agonists without TGRL. Phosphorylation of p38 MAPK and cytosolic phospholipase A2 (cPLA2) was enhanced after incubation of platelets with T2D TGRL and thrombin (+87% and +32%, respectively, P < 0.05) compared with platelets incubated with thrombin only. CONCLUSION Large TGRL from fasting T2D patients may play a role in the development of atherothrombosis by increasing platelet aggregation and activating the platelet AA signaling pathway.
Collapse
Affiliation(s)
- M M Boulet
- Université-Lyon, CarMeN Laboratory, Inserm U1060, INRA U1397, INSA Lyon, université Claude-Bernard Lyon 1, IMBL, 69621 Villeurbanne, France
| | - D Cheillan
- Université-Lyon, CarMeN Laboratory, Inserm U1060, INRA U1397, INSA Lyon, université Claude-Bernard Lyon 1, IMBL, 69621 Villeurbanne, France; Laboratoire de biochimie et de biologie moléculaire Grand Est, centre de biologie et de pathologie Est, hospices civils de Lyon, 69677 Bron, France
| | - M Di Filippo
- Université-Lyon, CarMeN Laboratory, Inserm U1060, INRA U1397, INSA Lyon, université Claude-Bernard Lyon 1, IMBL, 69621 Villeurbanne, France; Laboratoire de biochimie et de biologie moléculaire Grand Est, centre de biologie et de pathologie Est, hospices civils de Lyon, 69677 Bron, France
| | - C Buisson
- Université-Lyon, CarMeN Laboratory, Inserm U1060, INRA U1397, INSA Lyon, université Claude-Bernard Lyon 1, IMBL, 69621 Villeurbanne, France
| | - M-C Michalski
- Université-Lyon, CarMeN Laboratory, Inserm U1060, INRA U1397, INSA Lyon, université Claude-Bernard Lyon 1, IMBL, 69621 Villeurbanne, France
| | - P Moulin
- Université-Lyon, CarMeN Laboratory, Inserm U1060, INRA U1397, INSA Lyon, université Claude-Bernard Lyon 1, IMBL, 69621 Villeurbanne, France; Fédération d'endocrinologie, maladies métaboliques, diabète et nutrition, hôpital Louis-Pradel, hospices civils de Lyon, 69677 Bron, France
| | - C Calzada
- Université-Lyon, CarMeN Laboratory, Inserm U1060, INRA U1397, INSA Lyon, université Claude-Bernard Lyon 1, IMBL, 69621 Villeurbanne, France.
| |
Collapse
|
2
|
Fouad Mansour M, Pelletier M, Boulet MM, Mayrand D, Brochu G, Lebel S, Poirier D, Fradette J, Cianflone K, Luu-The V, Tchernof A. Oxidative activity of 17β-hydroxysteroid dehydrogenase on testosterone in male abdominal adipose tissues and cellular localization of 17β-HSD type 2. Mol Cell Endocrinol 2015; 414:168-76. [PMID: 26123590 DOI: 10.1016/j.mce.2015.06.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 05/31/2015] [Accepted: 06/13/2015] [Indexed: 10/23/2022]
Abstract
Testosterone can be converted into androstenedione (4-dione) by 17β-hydroxysteroid dehydrogenase (HSD) activity likely performed by 17β-HSD type 2. Our objective was to evaluate the rate of testosterone conversion to 4-dione as well as expression and localization of 17β-HSD type 2 in omental (OM) vs. subcutaneous (SC) adipose tissues of men. Formation of 4-dione from testosterone was significantly higher in homogenates (p ≤ 0.001) and explants (p ≤ 0.01) of OM than SC tissue. Microscopy analyses and biochemical assays in cell fractions localized the enzyme in the vasculature/endothelial cells of adipose tissues. Conversion of testosterone to 4-dione was weakly detected in most OM and/or SC preadipocyte cultures. Positive correlations were found between 17β-HSD type 2 activity in whole tissue and BMI or SC adipocyte diameter. We conclude that conversion of testosterone to 4-dione detected in abdominal adipose tissue is caused by 17β-HSD type 2 which is localized in the vasculature of the adipose compartment.
Collapse
Affiliation(s)
- Mohamed Fouad Mansour
- Endocrinology and Nephrology, CHU de Québec-Université Laval Medical Center, Québec, Canada
| | - Mélissa Pelletier
- Endocrinology and Nephrology, CHU de Québec-Université Laval Medical Center, Québec, Canada
| | - Marie-Michèle Boulet
- Endocrinology and Nephrology, CHU de Québec-Université Laval Medical Center, Québec, Canada; Quebec Cardiology and Pulmonology Institute, School of Nutrition, Université Laval, Québec, Canada
| | - Dominique Mayrand
- Centre de recherche en organogénèse expérimentale de l'Université Laval /LOEX Division of Regenerative Medicine, CHU de Québec-Université Laval Medical Center, Québec, Canada; Department of Surgery, Université Laval, Québec, Canada
| | - Gaétan Brochu
- Department of General Surgery, CHU de Québec-Université Laval Medical Center, Québec, Canada
| | - Stefane Lebel
- Quebec Cardiology and Pulmonology Institute, School of Nutrition, Université Laval, Québec, Canada
| | - Donald Poirier
- Endocrinology and Nephrology, CHU de Québec-Université Laval Medical Center, Québec, Canada
| | - Julie Fradette
- Centre de recherche en organogénèse expérimentale de l'Université Laval /LOEX Division of Regenerative Medicine, CHU de Québec-Université Laval Medical Center, Québec, Canada; Department of Surgery, Université Laval, Québec, Canada
| | - Katherine Cianflone
- Quebec Cardiology and Pulmonology Institute, School of Nutrition, Université Laval, Québec, Canada
| | - Van Luu-The
- Endocrinology and Nephrology, CHU de Québec-Université Laval Medical Center, Québec, Canada
| | - André Tchernof
- Endocrinology and Nephrology, CHU de Québec-Université Laval Medical Center, Québec, Canada; Quebec Cardiology and Pulmonology Institute, School of Nutrition, Université Laval, Québec, Canada.
| |
Collapse
|
3
|
Tchernof A, Mansour MF, Pelletier M, Boulet MM, Nadeau M, Luu-The V. Updated survey of the steroid-converting enzymes in human adipose tissues. J Steroid Biochem Mol Biol 2015; 147:56-69. [PMID: 25448733 DOI: 10.1016/j.jsbmb.2014.11.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 11/10/2014] [Accepted: 11/12/2014] [Indexed: 12/26/2022]
Abstract
Over the past decade, adipose tissues have been increasingly known for their endocrine properties, that is, their ability to secrete a number of adipocytokines that may exert local and/or systemic effects. In addition, adipose tissues have long been recognized as significant sites for steroid hormone transformation and action. We hereby provide an updated survey of the many steroid-converting enzymes that may be detected in human adipose tissues, their activities and potential roles. In addition to the now well-established role of aromatase and 11β-hydroxysteroid dehydrogenase (HSD) type 1, many enzymes have been reported in adipocyte cell lines, isolated mature cells and/or preadipocytes. These include 11β-HSD type 2, 17β-HSDs, 3β-HSD, 5α-reductases, sulfatases and glucuronosyltransferases. Some of these enzymes are postulated to bear relevance for adipose tissue physiology and perhaps for the pathophysiology of obesity. This elaborate set of steroid-converting enzymes in the cell types of adipose tissue deserves further scientific attention. Our work on 20α-HSD (AKR1C1), 3α-HSD type 3 (AKR1C2) and 17β-HSD type 5 (AKR1C3) allowed us to clarify the relevance of these enzymes for some aspects of adipose tissue function. For example, down-regulation of AKR1C2 expression in preadipocytes seems to potentiate the inhibitory action of dihydrotestosterone on adipogenesis in this model. Many additional studies are warranted to assess the impact of intra-adipose steroid hormone conversions on adipose tissue functions and chronic conditions such as obesity, diabetes and cancer.
Collapse
Affiliation(s)
- André Tchernof
- Institut Universitaire de Cardiologie et Pneumologie de Québec, Québec, Canada; École de Nutrition, Université Laval, Québec, Canada; Endocrinologe et Néphrologie, Centre Hospitalier Universitaire de Québec, Québec, Canada.
| | - Mohamed Fouad Mansour
- Institut Universitaire de Cardiologie et Pneumologie de Québec, Québec, Canada; Endocrinologe et Néphrologie, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Mélissa Pelletier
- Endocrinologe et Néphrologie, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Marie-Michèle Boulet
- Institut Universitaire de Cardiologie et Pneumologie de Québec, Québec, Canada; École de Nutrition, Université Laval, Québec, Canada
| | - Mélanie Nadeau
- Institut Universitaire de Cardiologie et Pneumologie de Québec, Québec, Canada
| | - Van Luu-The
- Endocrinologe et Néphrologie, Centre Hospitalier Universitaire de Québec, Québec, Canada
| |
Collapse
|
4
|
Abstract
Androgens are regulators of important adipocyte functions such as adipogenesis, lipid storage, and lipolysis. Through depot-specific impact on the cells of each fat compartment, androgens could modulate body fat distribution patterns in humans. Testosterone and dihydrotestosterone have been shown to inhibit the differentiation of preadipocytes to lipid-storing adipocytes in several models including primary cultures of human adipocytes from both men and women. Androgen effects have also been observed on some markers of lipid metabolism such as LPL activity, fatty acid uptake, and lipolysis. Possible depot-specific and sex-specific effects have been observed in some but not all models. Transformation of androgen precursors to active androgens or their inactivation by enzymes that are expressed and functional in adipose tissue may contribute to modulate the local availability of active hormones. These phenomena, along with putative depot-specific interactions with glucocorticoids may contribute to human body fat distribution patterns.
Collapse
Affiliation(s)
- Mouna Zerradi
- Endocrinology and Nephrology, CHU de Quebec Research Center, 2705 Laurier Blvd. R-4779, Quebec City, PQ, Canada, G1V 4G2
- Department of Nutrition, Laval University, Québec City, Canada, G1V 4G2
| | - Julie Dereumetz
- Endocrinology and Nephrology, CHU de Quebec Research Center, 2705 Laurier Blvd. R-4779, Quebec City, PQ, Canada, G1V 4G2
- Department of Nutrition, Laval University, Québec City, Canada, G1V 4G2
| | - Marie-Michèle Boulet
- Endocrinology and Nephrology, CHU de Quebec Research Center, 2705 Laurier Blvd. R-4779, Quebec City, PQ, Canada, G1V 4G2
- Department of Nutrition, Laval University, Québec City, Canada, G1V 4G2
| | - André Tchernof
- Endocrinology and Nephrology, CHU de Quebec Research Center, 2705 Laurier Blvd. R-4779, Quebec City, PQ, Canada, G1V 4G2.
- Department of Nutrition, Laval University, Québec City, Canada, G1V 4G2.
| |
Collapse
|
5
|
Boulet MM. Conception d’un système conseiller intelligent dédié à la modélisation conceptuelle des données. CJLT / RCAT 2009. [DOI: 10.21432/t2cs4v] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
|