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Carulla P, Badia-Villanueva M, Civit S, Carrascal M, Abian J, Ricart-Jané D, Llobera M, Casanovas A, López-Tejero MD. The response to fasting and refeeding reveals functional regulation of lipoprotein lipase proteoforms. Front Physiol 2023; 14:1271149. [PMID: 37916217 PMCID: PMC10617031 DOI: 10.3389/fphys.2023.1271149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/04/2023] [Indexed: 11/03/2023] Open
Abstract
Lipoprotein lipase (LPL) is responsible for the intravascular catabolism of triglyceride-rich lipoproteins and plays a central role in whole-body energy balance and lipid homeostasis. As such, LPL is subject to tissue-specific regulation in different physiological conditions, but the mechanisms of this regulation remain incompletely characterized. Previous work revealed that LPL comprises a set of proteoforms with different isoelectric points, but their regulation and functional significance have not been studied thus far. Here we studied the distribution of LPL proteoforms in different rat tissues and their regulation under physiological conditions. First, analysis by two-dimensional electrophoresis and Western blot showed different patterns of LPL proteoforms (i.e., different pI or relative abundance of LPL proteoforms) in different rat tissues under basal conditions, which could be related to the tissue-specific regulation of the enzyme. Next, the comparison of LPL proteoforms from heart and brown adipose tissue between adults and 15-day-old rat pups, two conditions with minimal regulation of LPL in these tissues, yielded virtually the same tissue-specific patterns of LPL proteoforms. In contrast, the pronounced downregulation of LPL activity observed in white adipose tissue during fasting is accompanied by a prominent reconfiguration of the LPL proteoform pattern. Furthermore, refeeding reverts this downregulation of LPL activity and restores the pattern of LPL proteoforms in this tissue. Importantly, this reversible proteoform-specific regulation during fasting and refeeding indicates that LPL proteoforms are functionally diverse. Further investigation of potential differences in the functional properties of LPL proteoforms showed that all proteoforms exhibit lipolytic activity and have similar heparin-binding affinity, although other functional aspects remain to be investigated. Overall, this study demonstrates the ubiquity, differential distribution and specific regulation of LPL proteoforms in rat tissues and underscores the need to consider the existence of LPL proteoforms for a complete understanding of LPL regulation under physiological conditions.
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Affiliation(s)
- Pere Carulla
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Míriam Badia-Villanueva
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Sergi Civit
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Montserrat Carrascal
- Biological and Environmental Proteomics, Institute of Biomedical Research of Barcelona, Spanish National Research Council, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IIBB-CSIC/IDIBAPS), Barcelona, Spain
| | - Joaquin Abian
- Biological and Environmental Proteomics, Institute of Biomedical Research of Barcelona, Spanish National Research Council, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IIBB-CSIC/IDIBAPS), Barcelona, Spain
| | - David Ricart-Jané
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Miquel Llobera
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - Albert Casanovas
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
| | - M. Dolores López-Tejero
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
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Carmona-Maurici J, Rosa A, Azcona-Granada N, Peña E, Ricart-Jané D, Viñas A, López-Tejero MD, Domingo JC, Miñarro A, Baena-Fustegueras JA, Peinado-Onsurbe J, Pardina E. Irisin as a Novel Biomarker of Subclinical Atherosclerosis in Severe Obesity. Int J Mol Sci 2023; 24:ijms24098171. [PMID: 37175880 PMCID: PMC10179106 DOI: 10.3390/ijms24098171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/27/2023] [Accepted: 05/01/2023] [Indexed: 05/15/2023] Open
Abstract
Severe obesity (SO) can accelerate atherosclerosis and the onset of acute cardiovascular events. The diagnosis of atherosclerosis in the context of a high body mass index (BMI) can be challenging, making the identification of biomarkers clinically relevant. We aimed to assess the usefulness of irisin as a biomarker for subclinical atherosclerosis in participants with SO. This prospective observational study included 61 participants undergoing bariatric surgery for SO, defined as a BMI >40 kg/m2 or >35 kg/m2 with at least one comorbidity. Atherosclerotic plaques were detected by ultrasound. Plasma samples were obtained 1 month before and at 6 and 12 months after bariatric surgery to measure irisin by ELISA. Additionally, subcutaneous samples of adipose tissue were taken and genotyped to identify irisin polymorphism rs3480. Irisin levels were positively correlated with BMI (r = 0.23, p = 0.0064), negatively correlated with atheroma-related parameters (e.g., carotid intima-media thickness), and lower in subjects with atheroma (p < 0.0002). Irisin also showed good overall accuracy for discriminating plaque presence (AUC, 0.81; 95% CI, 0.6956-0.9156). However, the rs3480 polymorphism correlated with neither the irisin levels nor the presence of atheromas. Iirisin could identify subclinical atherosclerosis in SO and might facilitate clinical diagnosis.
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Affiliation(s)
- Júlia Carmona-Maurici
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
| | - Araceli Rosa
- Secció de Zoologia i Antropologia Biològica, Departament de Biologia Evolutiva Ecologia i Ciències Ambientals Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain
- Institut de Biomedicina de la Universitat de Barcelona (IBUB), 08028 Barcelona, Spain
- Centre for Biomedical Research Network on Mental Health (CIBERSAM), Instituto de Salud Carlos III, 28029 Barcelona, Spain
| | - Natalia Azcona-Granada
- Secció de Zoologia i Antropologia Biològica, Departament de Biologia Evolutiva Ecologia i Ciències Ambientals Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Elionora Peña
- Secció de Zoologia i Antropologia Biològica, Departament de Biologia Evolutiva Ecologia i Ciències Ambientals Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - David Ricart-Jané
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
| | - Anna Viñas
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
| | - Maria Dolores López-Tejero
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
| | - Joan Carles Domingo
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
| | - Antonio Miñarro
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Juan Antonio Baena-Fustegueras
- Gastrointestinal Surgery Department, Arnau de Vilanova University Hospital, IRB Lleida, University of Lleida, 25198 Lleida, Spain
| | - Julia Peinado-Onsurbe
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
| | - Eva Pardina
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
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Carmona-Maurici J, Cuello E, Ricart-Jané D, Miñarro A, Baena-Fustegueras JA, Peinado-Onsurbe J, Pardina E. Effect of bariatric surgery on inflammation and endothelial dysfunction as processes underlying subclinical atherosclerosis in morbid obesity. Surg Obes Relat Dis 2020; 16:1961-1970. [DOI: 10.1016/j.soard.2020.07.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/21/2020] [Accepted: 07/27/2020] [Indexed: 02/06/2023]
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Carmona-Maurici J, Cuello E, Ricart-Jané D, Miñarro A, Olsina Kissler JJ, Baena-Fustegueras JA, Peinado-Onsurbe J, Pardina E. Effect of bariatric surgery in the evolution of oxidative stress depending on the presence of atheroma in patients with morbid obesity. Surg Obes Relat Dis 2020; 16:1258-1265. [PMID: 32586725 DOI: 10.1016/j.soard.2020.04.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Morbid obesity is associated with accelerated atherosclerosis, a chronic vascular disease related to oxidative stress (OS) and endothelial dysfunction. OBJECTIVES We aimed to evaluate the effect of bariatric surgery (BS) on oxidative stress as a cardiovascular risk factor in patients with and without atheromatous plaques. SETTING Arnau de Vilanova University Hospital and University of Barcelona. METHODS Plasma samples from 66 patients with morbid obesity were obtained before BS and 6 and 12 months after. Patients were divided into 2 groups based on the presence of atheromatous plaques (detected by ultrasonography). OS parameters were measured by enzyme-linked immunosorbent assay. RESULTS Patients with morbid obesity had OS independently of the presence of an atheroma, but oxidized low-density lipoprotein levels were higher in patients with plaques throughout the study (P = .0430). After surgery, oxidized low-density lipoprotein and malondialdehyde levels decreased significantly (P < .0001 in both cases). At the beginning of the study, antioxidant enzyme levels were the same between the groups. After surgery, paraoxonase 1 levels were increased (P < .0001) in the group without plaque, being significantly higher (P = .0147). Superoxide dismutase 2 levels were only decreased in patients without plaque (P < .0010), while catalase activity was higher in patients with plaque. CONCLUSIONS Morbid obesity may lead to chronic OS, which increases predisposition to atherogenesis. BS improves the antioxidant profile and reduces OS and co-morbidities in both groups. However, the benefits are greater for patients without plaque. Therefore, BS may prevent atheroma formation and also could prevent plaque rupture by decreasing OS.
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Affiliation(s)
- Júlia Carmona-Maurici
- Department of Biochemistry and Molecular Biomedicine, Biology Faculty, University of Barcelona, Barcelona, Spain
| | - Elena Cuello
- Gastrointestinal Surgery Department, Arnau de Vilanova University Hospital, IRB Lleida, University of Lleida, Lleida, Spain
| | - David Ricart-Jané
- Department of Biochemistry and Molecular Biomedicine, Biology Faculty, University of Barcelona, Barcelona, Spain
| | - Antonio Miñarro
- Department of Genetics, Microbiology, and Statistics, Biology Faculty, University of Barcelona, Barcelona, Spain
| | - Jorge Juan Olsina Kissler
- Gastrointestinal Surgery Department, Arnau de Vilanova University Hospital, IRB Lleida, University of Lleida, Lleida, Spain
| | - Juan Antonio Baena-Fustegueras
- Gastrointestinal Surgery Department, Arnau de Vilanova University Hospital, IRB Lleida, University of Lleida, Lleida, Spain
| | - Julia Peinado-Onsurbe
- Department of Biochemistry and Molecular Biomedicine, Biology Faculty, University of Barcelona, Barcelona, Spain.
| | - Eva Pardina
- Department of Biochemistry and Molecular Biomedicine, Biology Faculty, University of Barcelona, Barcelona, Spain
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Cambras T, Pardina E, Carmona J, Ricart-Jané D, Miñarro A, Ferrer R, Lecube A, Balibrea JM, Caubet E, González O, Vilallonga R, Fort JM, Cuello E, Baena-Fustegueras JA, Díez-Noguera A, Peinado-Onsurbe J. Seasonal variations of changes in lipid and glucidic variables after bariatric surgery. Chronobiol Int 2018; 36:250-257. [PMID: 30351989 DOI: 10.1080/07420528.2018.1533560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Seasonality is a phenomenon that is characterized by changes over the year in sleep, mood, behaviour, appetite and body weight. In humans, seasonal variations have been found in certain variables, such as lipid variables and body mass index. We hypothesize that this rhythm could influence the expected variation of the levels of biochemical variables in cases of body weight loss. Thus, the goal of this study was to observe whether the time of year in which bariatric surgery (BS) took place modulated the changes in several variables related to glucidic and lipid metabolism. Blood samples were obtained from 24 women and 10 men before BS and 1 and 3 months after BS. We calculated the percentage of variation that occurred for each individual and for each variable as a function of the time of the year. Data were adjusted to a 12-month period sinusoidal curve, with significance being set at p < 0.05. The results showed that almost all of the studied variables changed due to the BS according to a seasonal rhythm. Most of the variables showed a decrease that was most prominent in winter. In the cases of body mass index (BMI), adrenocorticotropin hormone (ACTH), and cortisol, the highest variation occurred in winter. Insulin and cholesterol in high-density lipoproteins (cHLD) variations were higher in springtime. Glucose variation showed a decrease after surgery with acrophase in summer-fall and plasminogen activator inhibitor-1 (PAI-1) and homeostatic model assessment-insulin resistance (HOMA-IR) in spring-summer. Ghrelin levels showed increases with a rhythm of variation with an acrophase in summer-fall. The seasonal rhythm found in this study fits nearly with the inverse of the endogenous circannual rhythm of the variables studied. The time of the year when the highest variation takes place is related to the circannual rhythm of the variable. The results agree with the manifestation of seasonal rhythm in human biochemical variables, which are reflected in the responses to weight loss after BS.
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Affiliation(s)
- Trinitat Cambras
- a Department of Physiology and Biochemistry, Faculty of pharmacy and Food Sciences , Universitat de Barcelona , Barcelona , Spain
| | - Eva Pardina
- b Department of Biochemistry and Molecular Biomedicine, Biology Faculty , Barcelona University , Barcelona , Spain
| | - Júlia Carmona
- b Department of Biochemistry and Molecular Biomedicine, Biology Faculty , Barcelona University , Barcelona , Spain
| | - David Ricart-Jané
- b Department of Biochemistry and Molecular Biomedicine, Biology Faculty , Barcelona University , Barcelona , Spain
| | - Antonio Miñarro
- c Department of Genetics, Microbiology and Statistics, Biology Faculty , Barcelona University , Barcelona , Spain
| | - Roser Ferrer
- d Department of Biochemistry , Institut de Recerca Hospital Universitari Vall d'Hebron , Barcelona , Spain
| | - Albert Lecube
- e Department of Endocrinology and Nutrition , Arnau de Vilanova University Hospital, CIBER de Diabetes y Enfermedades Metabólicas (CIBERDEM, Spain) , Lleida , Spain
| | - José María Balibrea
- f Endocrinology Surgery Unit , Hospital Universitari Vall d'Hebron , Barcelona , Spain
| | - Enric Caubet
- f Endocrinology Surgery Unit , Hospital Universitari Vall d'Hebron , Barcelona , Spain
| | - Oscar González
- f Endocrinology Surgery Unit , Hospital Universitari Vall d'Hebron , Barcelona , Spain
| | - Ramón Vilallonga
- f Endocrinology Surgery Unit , Hospital Universitari Vall d'Hebron , Barcelona , Spain
| | - Jose Manuel Fort
- f Endocrinology Surgery Unit , Hospital Universitari Vall d'Hebron , Barcelona , Spain
| | - Elena Cuello
- g Endocrinology Surgery Unit , Arnau de Vilanova University Hospital (UdL) , Lleida , Spain
| | | | - Antoni Díez-Noguera
- a Department of Physiology and Biochemistry, Faculty of pharmacy and Food Sciences , Universitat de Barcelona , Barcelona , Spain
| | - Julia Peinado-Onsurbe
- b Department of Biochemistry and Molecular Biomedicine, Biology Faculty , Barcelona University , Barcelona , Spain
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Rossell J, González M, Mestres N, Pardina E, Ricart-Jané D, Peinado-Onsurbe J, Baena-Fustegueras JA. Diet Change After Sleeve Gastrectomy Is More Effective for Weight Loss Than Surgery Only. Obes Surg 2018; 27:2566-2574. [PMID: 28342156 DOI: 10.1007/s11695-017-2650-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Bariatric surgery with or without diet change has become one of the most effective treatments for obesity. The objective of this study was to observe the effects of vertical sleeve gastrectomy (VSG) and diet change in Sprague-Dawley rats on both body and tissue weights. METHODS Eighteen rats were fed with a standard chow diet (SCD) (C group), and 36 rats were fed with a high-fat diet (HFD) (diet-induced obesity (DIO) group). After 8 weeks, the animals underwent VSG, sham surgery or no surgery (NS). After surgery, a third of the rats fed with the HFD changed to the SCD (DIO + C group). Body weight, food and energy intake were recorded daily during the experiment (12 weeks). Food efficiency (%) (FE) was determined from weekly weight gain and weekly kilocalorie consumed measurements. RESULTS The DIO group had higher and significant weight gain than the C group at the time of surgery (p < 0.001). The major weight loss (WL) was observed in the DIO + C-VSG group, during the 4 weeks after surgery. Adipose tissues in the DIO + C-VSG group were drastically reduced and had a weight similar to those in the C-VSG group. CONCLUSION VSG and the diet change combination led to a greater WL, which was maintained during the 4 weeks post-surgery, leading to a normalization of body weight. VSG and diet change also affected most of the tissues, not only adipose, showing a global change in whole body composition.
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Affiliation(s)
- Joana Rossell
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028, Barcelona, Spain
| | - Marta González
- Unitat de Cirurgia, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, Lleida, Spain
| | - Núria Mestres
- Unitat de Cirurgia, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, Lleida, Spain
| | - Eva Pardina
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028, Barcelona, Spain
| | - David Ricart-Jané
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028, Barcelona, Spain
| | - Julia Peinado-Onsurbe
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028, Barcelona, Spain.
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Cambras T, Baena-Fustegueras JA, Pardina E, Ricart-Jané D, Rossell J, Díez-Noguera A, Peinado-Onsurbe J. Seasonal variation in plasma lipids and lipases in young healthy humans. Chronobiol Int 2017; 34:1248-1258. [DOI: 10.1080/07420528.2017.1359618] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Trinitat Cambras
- Departament de Fisiologia i Bioquímica, Facultat de Farmàcia i Ciències de l’Alimentació, Universitat de Barcelona, Barcelona, Spain
| | | | - Eva Pardina
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - David Ricart-Jané
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - Joana Rossell
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - Antoni Díez-Noguera
- Departament de Fisiologia i Bioquímica, Facultat de Farmàcia i Ciències de l’Alimentació, Universitat de Barcelona, Barcelona, Spain
| | - Julia Peinado-Onsurbe
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
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Pardina E, Ferrer R, Rossell J, Ricart-Jané D, Méndez-Lara KA, Baena-Fustegueras JA, Lecube A, Julve J, Peinado-Onsurbe J. Hepatic CD36 downregulation parallels steatosis improvement in morbidly obese undergoing bariatric surgery. Int J Obes (Lond) 2017; 41:1388-1393. [PMID: 28555086 DOI: 10.1038/ijo.2017.115] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 02/28/2017] [Accepted: 04/02/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND The notion that hepatic expression of genes involved in lipid metabolism is altered in obese patients is relatively new and its relationship with hepatic steatosis and cardiometabolic alterations remains unclear. OBJECTIVE We assessed the impact of Roux-en-Y gastric bypass surgery (RYGB) on the expression profile of genes related to metabolic syndrome in liver biopsies from morbidly obese individuals using a custom-made, focused cDNA microarray, and assessed the relationship between the expression profile and hepatic steatosis regression. MATERIALS AND METHODS Plasma and liver samples were obtained from patients at baseline and 12 months after surgery. Samples were assayed for chemical and gene expression analyses, as appropriate. Gene expression profiles were assessed using custom-made, focused TaqMan low-density array cards. RESULTS RYGB-induced weight loss produced a favorable reduction in fat deposits, insulin resistance (estimated by homeostasis model assessment of insulin resistance (HOMA-IR)), and plasma and hepatic lipid levels. Compared with the baseline values, the gene expression levels of key targets of lipid metabolism were significantly altered: CD36 was significantly downregulated (-40%; P=0.001), whereas APOB (+27%; P=0.032) and SCARB1 (+37%; P=0.040) were upregulated in response to surgery-induced weight reduction. We also observed a favorable reduction in the expression of the PAI1 gene (-80%; P=0.007) and a significant increase in the expression of the PPARA (+60%; P=0.014) and PPARGC1 genes (+36%; P=0.015). Notably, the relative fold decrease in the expression of the CD36 gene was directly associated with a concomitant reduction in the cholesterol (Spearman's r=0.92; P=0.001) and phospholipid (Spearman's r=0.76; P=0.04) contents in this tissue. CONCLUSIONS For the first time, RYGB-induced weight loss was shown to promote a favorable downregulation of CD36 expression, which was proportional to a favorable reduction in the hepatic cholesterol and phospholipid contents in our morbidly obese subjects following surgery.
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Affiliation(s)
- E Pardina
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - R Ferrer
- Unitat d'Hormones, Servei de Bioquímica, Hospital Universitari de la Vall d'Hebron, Barcelona, Spain
| | - J Rossell
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - D Ricart-Jané
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - K A Méndez-Lara
- Institut de Recerca de l'Hospital de La Santa Creu i Sant Pau, Institut d'Investigacions Biomèdiques de l'Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, Barcelona, Spain.,Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | | | - A Lecube
- Departament d'Endocrinologia i Nutrició, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, Lleida, Spain.,Unitat de Recerca en Diabetes i Metabolisme, Institut de Recerca Hospital Universitari Vall d'Hebron, Barcelona, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, CIBERDEM, Barcelona, Spain
| | - J Julve
- Institut de Recerca de l'Hospital de La Santa Creu i Sant Pau, Institut d'Investigacions Biomèdiques de l'Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, Barcelona, Spain.,Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Bellaterra, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, CIBERDEM, Barcelona, Spain
| | - J Peinado-Onsurbe
- Departament de Bioquímica i Biomedicina Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
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Pinto H, Ricart-Jané D, Pardina E. Pre and post lipocryolysis thermic conditioning enhances rat adipocyte destruction. Cryo Letters 2014; 35:154-160. [PMID: 24869648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND New knowledge about crystallization vs. lipid-to-gel transition has surfaced recently, since some of the latest publications on lipocryolysis have focused on its action mechanism. As a result, new opportunities for technical improvements and clinical outcome optimization have opened up. The food industry has been working with lipid crystal polymorphisms for decades, and tempering seems to be the easiest method of external conditioning, in addition to being harmless. OBJECTIVE Evaluate if pre and post lipocryolyisis thermic conditioning enhances rat adipocyte destruction. METHODS Several temperature treatment patterns (TTP) were applied to isolated rat adipocytes. The survival of the adipocytes exposed to the different TTPs and the formation of crystals in the surviving adipocytes were assessed and analyzed. RESULT Pre and post lipocryolysis thermic conditioning changed lipocryolyisis crystallization process and showed an enhancement in adipocyte destruction that could represent an important step in improving clinical results. CONCLUSIONS pre and post lipocryolyisis thermic conditioning enhances rat adipocyte destruction.
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Affiliation(s)
- Hermán Pinto
- Instituto de Investigaciones para las Especialidades Esteticas y del Envejecimiento, Barcelona. )
| | | | - Eva Pardina
- Centre de Recerca en Metabolisme, Barcelona (CEREMET)
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Ricart-Jané D, Casanovas A, Jané N, González M, Buira-Morell I, Ribera J, Llobera M, López-Tejero MD. Nitric Oxide and the Release of Lipoprotein Lipase from White Adipose Tissue. Cell Physiol Biochem 2008; 22:525-30. [DOI: 10.1159/000185526] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2008] [Indexed: 11/19/2022] Open
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Ricart-Jané D, Cejudo-Martín P, Peinado-Onsurbe J, López-Tejero MD, Llobera M. Changes in lipoprotein lipase modulate tissue energy supply during stress. J Appl Physiol (1985) 2005; 99:1343-51. [PMID: 15947029 DOI: 10.1152/japplphysiol.00971.2004] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We studied the variations caused by stress in lipoprotein lipase (LPL) activity, LPL-mRNA, and local blood flow in LPL-rich tissues in the rat. Stress was produced by body immobilization (Immo): the rat's limbs were taped to metal mounts, and its head was placed in a plastic tube. Chronic stress (2 h daily of Immo) decreased total LPL activity in mesenteric and epididymal white adipose tissue (WAT) and was accompanied by a weight reduction of these tissues. In limb muscle, heart, and adrenals, total LPL activity and mRNA levels increased, and, in plasma, LPL activity and mass also increased. Acute stress (30-min Immo) caused a decrease in total LPL activity only in retroperitoneal WAT and an increase in preheparin plasma active LPL, but the overall weight of this tissue did not vary significantly. We propose an early release of the enzyme from this tissue into the bloodstream by some unknown extracellular pathways or other local mechanisms. These changes in this key energy-regulating enzyme are probably induced by catecholamines. They modify the flow of energy substrates between tissues, switching the WAT from importer to exporter of free fatty acids and favoring the uptake by muscle of circulating triacylglycerides for energy supply. Moreover, we found that acute stress almost doubled blood flow in all WAT studied, favoring the export of free fatty acids.
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Affiliation(s)
- David Ricart-Jané
- Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Spain.
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Abstract
Experimental approaches involving the perfusion of tissues and organs offer the advantage of improved physiological relevance over the use of isolated tissues or cells while at the same time being much more controlled and tissue-specific than studies in vivo. Nevertheless, there have been few metabolic studies performed in perfused white adipose tissue, largely because of the difficulty of the surgical technique involved. Although some methods have been described, they are difficult to use as perfusion protocols and their reproducibility is poor. We have modified a rat perfusion method, based on a modification of the Ho and Meng technique, for use with epididymal white adipose tissue (eWAT), and we present it here as a protocol to be reproduced. We also offer surgical solutions for the most common variants of vessel distributions in rats. Using the protocol described here, the perfused adipose tissue is viable and metabolically active, as indicated by the maintenance of tissue ATP levels and adiponectin secretion and by endogenous lipolysis regulation. Moreover, there is a high level of lipoprotein lipase activity in the endothelium of the tissue, which is heparin-releasable. Thus, this method is a useful and reproducible tool that allows the perfusion of eWAT for use in metabolic studies.
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Affiliation(s)
- Gemma Cònsol
- Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, E-08071 Barcelona, Spain
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Abstract
Hepatic lipase activity is detectable in liver but also in adrenal glands, ovaries, and plasma. The subunit size of hepatic lipase in liver, adrenal glands, and nonheparin plasma was compared. Hepatic lipase in liver and adrenal glands appeared as a 55 kDa band. In liver, a faint band of lower size was also detected. In nonheparin plasma, hepatic lipase appeared as a doublet of 57 kDa and 59 kDa. When activity/mass ratio was calculated, similar values were obtained for liver and adrenal glands. In plasma this value was much lower. After heparin administration in vivo, hepatic lipase activity in plasma increased nearly 100-fold with appearance of an additional 55 kDa band in postheparin plasma. This band coeluted with activity after preparative polyacrylamide gel electrophoresis. Differences in size persisted after digestion with peptide-N-glycosidase F. A progressive increase in 57 kDa and 59 kDa in postheparin plasma followed disappearance of the 55 kDa band, suggesting that these larger bands originate from the smaller form. In plasma, both smaller and larger forms were associated with HDL, but not with LDL or VLDL. We conclude that rat plasma contains a larger form of hepatic lipase that is inactive in in vitro assay.
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Affiliation(s)
- Xavier Galan
- Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Avda. Diagonal 645, E-08071 Barcelona, Spain
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Ricart-Jané D, Rodríguez-Sureda V, Benavides A, Peinado-Onsurbe J, López-Tejero MD, Llobera M. Immobilization stress alters intermediate metabolism and circulating lipoproteins in the rat. Metabolism 2002; 51:925-31. [PMID: 12077743 DOI: 10.1053/meta.2002.33353] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In humans, stress can increase the risk of cardiovascular disease by altering lipoprotein metabolism. Scarce experimental and clinical data are available on this effect. Therefore, we studied the metabolic response to acute and chronic stress following a model of immobilization (IMO) in rats and we evaluated the resulting circulating lipoprotein levels. Repeated IMO treatment (2 hours daily, always between 9:00 AM and 11:00 AM, for 2 periods of 5 and 4 consecutive days, separated by 2 days of rest) daily decreased body weight gain and food intake, increased adrenal weight, and slightly reduced liver glycogen and plasma insulin (without considerable variations of blood glucose), which is characteristic of chronic stress. A single IMO application (30 minutes of an unexpected IMO starting at 2:00 PM immediately before the animals were killed) significantly increased the circulating levels of corticosterone, glucose, insulin, glycerol, and ketone bodies, which is the typical response to acute stress. Both acute and chronic stress decreased the plasmatic triacylglycerol (TAG) concentration, as reflected by the reduction in the number of very-low-density lipoprotein (VLDL) particles. This may be due to an increase in the metabolization of TAG, as suggested by the slightly higher amounts of circulating LDLs. Chronic stress, but not acute stress, significantly increased both the number and the estimated size of circulating high-density lipoprotein (HDLs), as shown by the plasma cholesterol concentration. Acute stress did not have an additive effect over chronic stress on the lipoprotein parameters studied. The metabolic effects of these IMO-induced alterations on lipoprotein profiles are discussed, and future studies in lipidic metabolism are suggested.
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Affiliation(s)
- David Ricart-Jané
- Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
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Ricart-Jané D, Llobera M, López-Tejero MD. Anticoagulants and other preanalytical factors interfere in plasma nitrate/nitrite quantification by the Griess method. Nitric Oxide 2002; 6:178-85. [PMID: 11890742 DOI: 10.1006/niox.2001.0392] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nitric oxide (NO) is a signal molecule with functions such as neurotransmission, local vascular relaxation, and anti-inflammation in many physiological and pathological processes. Various factors regulate its intracellular lifetime. Due to its high reactivity in biological systems, it is transformed in the bloodstream into nitrates (NO(-)(3)) by oxyhemoglobin. The Griess reaction is a technically simple method (spectrophotometric, 540 nm) for the analysis of nitrites (NO(-)(2)) in aqueous solutions. We studied the interference of common anticoagulants in the quantification of nitrate and nitrite in plasma samples by the Griess method. We obtained rat plasma using heparin or sodium EDTA as anticoagulants, then added, or otherwise, known NO(-)(3) amounts in order to calculate their recovery. We also studied the effect of ultra-filtration performed before Griess reaction on plasma and aqueous solutions of various anticoagulants (heparin, EDTA, and also sodium citrate) to compare the recoveries of added NO(-)(3) or NO(-)(2). We used standards of NO(-)(3) or NO(-)(2) for quantification. We conclude that: (i) The bacterial nitrate reductase used to reduce NO(-)(3) to NO(-)(2) is unstable in certain storage conditions and interferes with different volumes of plasma used. (ii) The ultrafiltration (which is sometimes performed before the Griess reaction) of plasma obtained with EDTA or citrate is not recommended because it leads to overestimation of NO(minus sign)(3). In contrast, ultrafiltration is necessary when heparin is used. (iii) The absorbance at 540 nm attributed to plasma itself (basal value or background) interferes in final quantification, especially when ultrafiltration is not performed. For the quantification of plasma NO(-)(3) we recommend: sodium EDTA as anticoagulant, no ultrafiltration of plasma, and measurement of the absorbance background of each sample.
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Affiliation(s)
- D Ricart-Jané
- Departament de Bioquímica i Biologia Molecular, Unitat B, Facultat de Biologia, Universitat de Barcelona, Spain
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