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Morfoisse F, De Toni F, Nigri J, Hosseini M, Zamora A, Tatin F, Pujol F, Sarry JE, Langin D, Lacazette E, Prats AC, Tomasini R, Galitzky J, Bouloumié A, Garmy-Susini B. Coordinating Effect of VEGFC and Oleic Acid Participates to Tumor Lymphangiogenesis. Cancers (Basel) 2021; 13:cancers13122851. [PMID: 34200994 PMCID: PMC8227717 DOI: 10.3390/cancers13122851] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/18/2021] [Accepted: 05/25/2021] [Indexed: 01/22/2023] Open
Abstract
Simple Summary In cancer, the lymphatic system is hijacked by tumor cells that escape from primary tumor and metastasize to the sentinel lymph nodes. Tumor lymphangiogenesis is stimulated by the vascular endothelial growth factors-C (VEGFC) after binding to its receptor VEGFR-3. However, how VEGFC cooperates with other molecules to promote lymphatic neovessel growth has not been fully determined. Here, we showed that tumor lymphangiogenesis developed in tumoral lesions and in their surrounding adipose tissue (AT). Interestingly, lymphatic vessel density correlated with an increase in circulating free fatty acids (FFA) in the lymph from tumor-bearing mice. We showed that adipocyte-released FFA are uploaded by lymphatic endothelial cells (LEC) to stimulate their sprouting. Lipidomic analysis identified the monounsaturated oleic acid (OA) as the major circulating FFA in the lymph in a tumoral context. OA transporters FATP-3, -6 and CD36 were only upregulated on LEC in the presence of VEGFC showing a collaborative effect of these molecules. OA released from adipocytes is taken up by LECs to stimulate the fatty acid β-oxidation, leading to increased adipose tissue lymphangiogenesis. Our results provide new insights on the dialogue between tumors and adipocytes via the lymphatic system and identify a key role for adipocyte-derived FFA in the promotion of lymphangiogenesis, revealing novel therapeutic opportunities for inhibitors of lymphangiogenesis in cancer. Abstract In cancer, the lymphatic system is hijacked by tumor cells that escape from primary tumor and metastasize to the sentinel lymph nodes. Tumor lymphangiogenesis is stimulated by the vascular endothelial growth factors-C (VEGFC) after binding to its receptor VEGFR-3. However, how VEGFC cooperates with other molecules to promote lymphatics growth has not been fully determined. We showed that lymphangiogenesis developed in tumoral lesions and in surrounding adipose tissue (AT). Interestingly, lymphatic vessel density correlated with an increase in circulating free fatty acids (FFA) in the lymph from tumor-bearing mice. We showed that adipocyte-released FFA are uploaded by lymphatic endothelial cells (LEC) to stimulate their sprouting. Lipidomic analysis identified the monounsaturated oleic acid (OA) as the major circulating FFA in the lymph in a tumoral context. OA transporters FATP-3, -6 and CD36 were only upregulated on LEC in the presence of VEGFC showing a collaborative effect of these molecules. OA stimulates fatty acid β-oxidation in LECs, leading to increased AT lymphangiogenesis. Our results provide new insights on the dialogue between tumors and adipocytes via the lymphatic system and identify a key role for adipocyte-derived FFA in the promotion of lymphangiogenesis, revealing novel therapeutic opportunities for inhibitors of lymphangiogenesis in cancer.
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Affiliation(s)
- Florent Morfoisse
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Fabienne De Toni
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Jeremy Nigri
- CRCM, Inserm UMR 1068, 13001 Marseille, France; (J.N.); (R.T.)
| | - Mohsen Hosseini
- CRCT, Université de Toulouse, Inserm UMR 1037, UPS, 31000 Toulouse, France; (M.H.); (J.-E.S.)
| | - Audrey Zamora
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Florence Tatin
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Françoise Pujol
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Jean-Emmanuel Sarry
- CRCT, Université de Toulouse, Inserm UMR 1037, UPS, 31000 Toulouse, France; (M.H.); (J.-E.S.)
| | - Dominique Langin
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Eric Lacazette
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Anne-Catherine Prats
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | | | - Jean Galitzky
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Anne Bouloumié
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
| | - Barbara Garmy-Susini
- I2MC, Université de Toulouse, Inserm UMR 1297, UPS, 31000 Toulouse, France; (F.M.); (F.D.T.); (A.Z.); (F.T.); (F.P.); (D.L.); (E.L.); (A.-C.P.); (J.G.); (A.B.)
- Correspondence:
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2
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Ekramzadeh M, Hajivandi L, Noroozi M, Mostafavi F. Psychological Experiences of Adolescent Girls with Polycystic Ovary Syndrome: A Qualitative Study. IRANIAN JOURNAL OF NURSING AND MIDWIFERY RESEARCH 2020; 25:341-347. [PMID: 33014747 PMCID: PMC7494171 DOI: 10.4103/ijnmr.ijnmr_276_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 02/29/2020] [Accepted: 04/28/2020] [Indexed: 11/04/2022]
Abstract
Background Polycystic Ovary Syndrome (PCOS) is one of the most common endocrine disorders in the women of reproductive age. In addition to multiple physical problems, this syndrome has many psychological manifestations. Thus, the present research was conducted aimed at investigating the psychological experiences of the adolescent girls with PCOS. Materials and Methods This research was conducted using the qualitative content analysis method. A total of 18 adolescent girls with PCOS and 15 healthcare providers were selected by the purposive sampling method. The data were collected through in-depth interviews, focus group discussions, and field notes, which were analyzed using the conventional content analysis method. Results After analyzing, three main categories and seven subcategories were extracted. First, the psychological experiences related to the disease symptoms had three subcategories: "psychological experiences related to hirsutism, alopecia, and acne," "psychological experiences related to obesity," and "psychological experiences related to menstrual disorders." Second, the psychological experiences related to disease complications had two subcategories: "psychological experiences related to infertility" and "psychological experiences related to disease progression." Third, the psychological experiences related to treatment of the disease had two subcategories: "psychological experiences related to prolongation of the treatment and uncertain fate of the disease" and "psychological experiences related to the complications of the medical treatment." Conclusions Results of the study showed that adolescent girls with PCOS were exposed to multiple concerns endangering their psychological health. Therefore, it is recommended to provide adequate and appropriate information about the disease and its consequences, as well as psychosocial supports and regular assessment of psychological state by the team of healthcare providers in the adolescent girls with PCOS.
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Affiliation(s)
- Maryam Ekramzadeh
- Nutrition Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Leila Hajivandi
- Department of Nursing and Midwifery, Kazerun Medical Sciences Branch, Islamic Azad University, Kazerun, Iran
| | - Mahnaz Noroozi
- Department of Midwifery and Reproductive Health, School of Nursing and Midwifery, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Firoozeh Mostafavi
- Department of Health Education and Promotion, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
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Beulen Y, Martínez-González MA, van de Rest O, Salas-Salvadó J, Sorlí JV, Gómez-Gracia E, Fiol M, Estruch R, Santos-Lozano JM, Schröder H, Alonso-Gómez A, Serra-Majem L, Pintó X, Ros E, Becerra-Tomas N, González JI, Fitó M, Martínez JA, Gea A. Quality of Dietary Fat Intake and Body Weight and Obesity in a Mediterranean Population: Secondary Analyses within the PREDIMED Trial. Nutrients 2018; 10:E2011. [PMID: 30572588 PMCID: PMC6315420 DOI: 10.3390/nu10122011] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/12/2018] [Accepted: 12/14/2018] [Indexed: 12/21/2022] Open
Abstract
A moderately high-fat Mediterranean diet does not promote weight gain. This study aimed to investigate the association between dietary intake of specific types of fat and obesity and body weight. A prospective cohort study was performed using data of 6942 participants in the PREDIMED trial, with yearly repeated validated food-frequency questionnaires, and anthropometric outcomes (median follow-up: 4.8 years). The effects of replacing dietary fat subtypes for one another, proteins or carbohydrates were estimated using generalized estimating equations substitution models. Replacement of 5% energy from saturated fatty acids (SFA) with monounsaturated fatty acids (MUFA) or polyunsaturated fatty acids (PUFA) resulted in weight changes of -0.38 kg (95% Confidece Iinterval (CI): -0.69, -0.07), and -0.51 kg (95% CI: -0.81, -0.20), respectively. Replacing proteins with MUFA or PUFA decreased the odds of becoming obese. Estimates for the daily substitution of one portion of red meat with white meat, oily fish or white fish showed weight changes up to -0.87 kg. Increasing the intake of unsaturated fatty acids at the expense of SFA, proteins, and carbohydrates showed beneficial effects on body weight and obesity. It may therefore be desirable to encourage high-quality fat diets like the Mediterranean diet instead of restricting total fat intake.
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Grants
- RTIC G03/140, RTIC RD 06/0045 Instituto de Salud Carlos III
- - CIBERobn
- CNIC 06/2007 Centro Nacional de Investigaciones Cardiovasculares
- PI04-2239, PI 05/2584, CP06/00100, PI07/0240, PI07/1138, PI07/0954, PI 07/0473, PI10/01407, PI10/02658, PI11/01647, P11/02505 Fondo de Investigación Sanitaria - Fondo Europeo de Desarrollo Regional
- AGL-2009-13906-C02, AGL2010-22319-C03 Ministerio de Ciencia e Innovación
- Fundación Mapfre 2010 Fundación Mapfre 2010
- PI0105/2007 Consejería de Salud de la Junta de Andalucía
- ACOMP06109, GVACOMP2010-181, GVACOMP2011-151, CS2010-AP-111, CS2011-AP-042, and PROMETEO17/2017 Public Health Division of the Department of Health of the Autonomous Government of Catalonia, Generalitat Valenciana
- P27/2011 Regional Government of Navarra
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Affiliation(s)
- Yvette Beulen
- Division of Human Nutrition, Wageningen University, 6708 Wageningen, The Netherlands.
| | - Miguel A Martínez-González
- Department of Preventive Medicine & Public Health, University of Navarra, 31008 Pamplona, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
| | - Ondine van de Rest
- Division of Human Nutrition, Wageningen University, 6708 Wageningen, The Netherlands.
| | - Jordi Salas-Salvadó
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Human Nutrition Unit, Faculty of Medicine and Health Sciences, Pere Virgili Health Research Institute, Rovira i Virgili University, 43002 Reus, Spain.
| | - José V Sorlí
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Department of Preventive Medicine, University of Valencia, 46010 Valencia, Spain.
| | | | - Miquel Fiol
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Institute of Health Sciences IUNICS, University of Balearic Islands and Hospital Son Espases, 07010 Palma de Mallorca, Spain.
| | - Ramón Estruch
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Department of Internal Medicine, Department of Endocrinology and Nutrition Biomedical Research Institute August Pi Sunyer (IDI- BAPS), Hospital Clinic, University of Barcelona, 08036 Barcelona, Spain.
| | - José M Santos-Lozano
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Department of Family Medicine, Research Unit, Distrito Sanitario Atención Primaria Sevilla, Centro de Salud Universitario San Pablo, 41013 Sevilla, Spain.
| | - Helmut Schröder
- Cardiovascular and Nutrition Research Group (Regicor Study Group), Hospital del Mar Research Institute (IMIM), 08003 Barcelona, Spain.
- CIBER Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
| | - Angel Alonso-Gómez
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Department of Cardiology, University Hospital of Alava, 48940 Vitoria, Spain.
| | - Luis Serra-Majem
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Research Institute of Biomedical and Health Sciences (IUIBS), University of Las Palmas de Gran Canaria and Service of Preventive Medicine, Complejo Hospitalario Universitario Insular Materno Infantil (CHUIMI), Canary Health Service, 35016 Las Palmas de Gran Canaria, Spain.
| | - Xavier Pintó
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Lipids and Vascular Risk Unit, Internal Medicine, Hospital Universitario de Bellvitge, Hospitalet de Llobregat, 08907 Barcelona, Spain.
| | - Emilio Ros
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Lipid Clinic, Department of Endocrinology and Nutrition Biomedical Research Institute August Pi Sunyer (IDIBAPS), Hospital Clinic, University of Barcelona, 08036 Barcelona, Spain.
| | - Nerea Becerra-Tomas
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Human Nutrition Unit, Faculty of Medicine and Health Sciences, Pere Virgili Health Research Institute, Rovira i Virgili University, 43002 Reus, Spain.
| | - José I González
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Department of Preventive Medicine, University of Valencia, 46010 Valencia, Spain.
| | - Montserrat Fitó
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Cardiovascular and Nutrition Research Group (Regicor Study Group), Hospital del Mar Research Institute (IMIM), 08003 Barcelona, Spain.
| | - J Alfredo Martínez
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Spanish Government, 28029 Madrid, Spain.
- Department of Nutrition and Food Sciences and Physiology, University of Navarra, 31008 Pamplona, Spain.
| | - Alfredo Gea
- Department of Preventive Medicine & Public Health, University of Navarra, 31008 Pamplona, Spain.
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Serum FABP4 concentrations decrease after Roux-en-Y gastric bypass but not after intensive medical management. Surgery 2018; 165:571-578. [PMID: 30287050 DOI: 10.1016/j.surg.2018.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 07/19/2018] [Accepted: 08/06/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Serum concentrations of fatty acid binding protein 4, an adipose tissue fatty acid chaperone, have been correlated with insulin resistance and cardiovascular risk factors. The objective of this study were to assess relationships among Roux-en-Y gastric bypass, intensive lifestyle modification and medical management protocol, fatty acid binding protein 4, and metabolic parameters in obese patients with severe type 2 diabetes mellitus; and to evaluate the relative contribution of abdominal subcutaneous adipose and visceral adipose to the secretion of fatty acid binding protein 4. METHODS Participants were randomly assigned to intensive lifestyle modification and medical management protocol (n = 29) or to intensive lifestyle modification and medical management protocol augmented with Roux-en-Y gastric bypass (n = 34). Relationships among fatty acid binding protein 4 and demographic characteristics, metabolic parameters, and 12-month changes in these values were examined. Visceral and subcutaneous adipose tissue explants from obese nondiabetic patients (n = 5) were obtained and treated with forskolin to evaluate relative secretion of fatty acid binding protein 4 in the different adipose tissue depots. RESULTS The intensive lifestyle modification and medical management protocol and Roux-en-Y gastric bypass cohorts had similar fasting serum fatty acid binding protein 4 concentrations at baseline. At 1 year, mean serum fatty acid binding protein 4 decreased by 42% in Roux-en-Y gastric bypass participants (P = .002) but did not change significantly in the intensive lifestyle modification and medical management protocol cohort. Percentage of weight change was not a significant predictor of 12-month fatty acid binding protein 4 within treatment arm or in multivariate models adjusted for treatment arm. In adipose tissue explants, fatty acid binding protein 4 was secreted similarly between visceral and subcutaneous adipose tissue. CONCLUSION After Roux-en-Y gastric bypass, fatty acid binding protein 4 is reduced 12 months after surgery but not after intensive lifestyle modification and medical management protocol in patients with type 2 diabetes mellitus. Fatty acid binding protein 4 was secreted similarly between subcutaneous and visceral adipose tissue explants.
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Silva Figueiredo P, Inada AC, Ribeiro Fernandes M, Granja Arakaki D, Freitas KDC, Avellaneda Guimarães RDC, Aragão do Nascimento V, Aiko Hiane P. An Overview of Novel Dietary Supplements and Food Ingredients in Patients with Metabolic Syndrome and Non-Alcoholic Fatty Liver Disease. Molecules 2018; 23:molecules23040877. [PMID: 29641459 PMCID: PMC6017470 DOI: 10.3390/molecules23040877] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 03/29/2018] [Accepted: 04/05/2018] [Indexed: 12/13/2022] Open
Abstract
Metabolic syndrome (MetS) is characterized by interconnected factors related to metabolic disturbances, and is directly related to the occurrence of some diseases such as cardiovascular diseases and type 2 diabetes. MetS is described as one or both of insulin resistance and visceral adiposity, considered the initial causes of abnormalities that include hyperglycemia, elevated blood pressure, dyslipidemia, elevated inflammatory markers, and prothrombotic state, as well as polycystic ovarian syndrome in women. Other than in MetS, visceral adiposity and the pro-inflammatory state are also key in the development of non-alcoholic fatty liver disease (NAFLD), which is the most prevalent chronic liver disease in modern society. Both MetS and NAFLD are related to diet and lifestyle, and their treatment may be influenced by dietary pattern changes and the use of certain dietary supplements. This study aimed to review the role of food ingredients and supplements in the management of MetS and NAFLD specifically in human clinical trials. Moreover, bioactive compounds and polyunsaturated fatty acids (PUFAs) may be used as strategies for preventing the onset of and treatment of metabolic disorders, such as MetS and NAFLD, improving the inflammatory state and other comorbidities, such as obesity, dyslipidemias, and cardiovascular diseases (CVD).
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Affiliation(s)
- Priscila Silva Figueiredo
- Post Graduate Program in Health and Development in the Central-West Region, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil.
| | - Aline Carla Inada
- Post Graduate Program in Health and Development in the Central-West Region, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil.
| | - Melina Ribeiro Fernandes
- Post Graduate Program in Health and Development in the Central-West Region, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil.
| | - Daniela Granja Arakaki
- Post Graduate Program in Health and Development in the Central-West Region, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil.
| | - Karine de Cássia Freitas
- Post Graduate Program in Health and Development in the Central-West Region, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil.
| | - Rita de Cássia Avellaneda Guimarães
- Post Graduate Program in Health and Development in the Central-West Region, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil.
- Optics and Photonics Group, Institute of Physics, Federal University of Mato Grosso do Sul, 549, Campo Grande 79070900, Brazil.
| | - Valter Aragão do Nascimento
- Post Graduate Program in Health and Development in the Central-West Region, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil.
- Optics and Photonics Group, Institute of Physics, Federal University of Mato Grosso do Sul, 549, Campo Grande 79070900, Brazil.
| | - Priscila Aiko Hiane
- Post Graduate Program in Health and Development in the Central-West Region, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil.
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Garcia-Rios A, Alcala-Diaz JF, Gomez-Delgado F, Delgado-Lista J, Marin C, Leon-Acuña A, Camargo A, Rodriguez-Cantalejo F, Blanco-Rojo R, Quintana-Navarro G, Ordovas JM, Perez-Jimenez F, Lopez-Miranda J, Perez-Martinez P. Beneficial effect of CETP gene polymorphism in combination with a Mediterranean diet influencing lipid metabolism in metabolic syndrome patients: CORDIOPREV study. Clin Nutr 2018; 37:229-234. [DOI: 10.1016/j.clnu.2016.12.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 11/09/2016] [Accepted: 12/11/2016] [Indexed: 12/27/2022]
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7
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López-Moreno J, García-Carpintero S, Jimenez-Lucena R, Haro C, Rangel-Zúñiga OA, Blanco-Rojo R, Yubero-Serrano EM, Tinahones FJ, Delgado-Lista J, Pérez-Martínez P, Roche HM, López-Miranda J, Camargo A. Effect of Dietary Lipids on Endotoxemia Influences Postprandial Inflammatory Response. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7756-7763. [PMID: 28793772 DOI: 10.1021/acs.jafc.7b01909] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Metabolic syndrome (MetS) results in postprandial metabolic alterations that predisposes one to a state of chronic low-grade inflammation and increased oxidative stress. We aimed to assess the effect of the consumption of the quantity and quality of dietary fat on fasting and postprandial plasma lipopolysaccharides (LPS). A subgroup of 75 subjects with metabolic syndrome was randomized to receive 1 of 4 diets: HSFA, rich in saturated fat; HMUFA, rich in monounsaturated fat; LFHCC n-3, low-fat, rich in complex carbohydrate diet supplemented with n-3 polyunsaturated fatty acids; LFHCC low-fat, rich in complex carbohydrate diet supplemented with placebo, for 12 weeks each. We administered a fat challenge reflecting the fatty acid composition of the diets at postintervention. We determined the plasma lipoproteins and glucose and gene expression in peripheral blood mononuclear cells (PBMC) and adipose tissue. LPS and LPS binding protein (LBP) plasma levels were determined by ELISA, at fasting and postprandial (4 h after a fat challenge) states. We observed a postprandial increase in LPS levels after the intake of the HSFA meal, whereas we did not find any postprandial changes after the intake of the other three diets. Moreover, we found a positive relationship between the LPS plasma levels and the gene expression of IkBa and MIF1 in PBMC. No statistically significant differences in the LBP plasma levels at fasting or postprandial states were observed. Our results suggest that the consumption of HSFA diet increases the intestinal absorption of LPS which, in turn, increases postprandial endotoxemia levels and the postprandial inflammatory response.
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Affiliation(s)
- Javier López-Moreno
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Sonia García-Carpintero
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Rosa Jimenez-Lucena
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Carmen Haro
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Oriol A Rangel-Zúñiga
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Ruth Blanco-Rojo
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Elena M Yubero-Serrano
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Francisco J Tinahones
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
- Endocrinology and Nutrition Service, Hospital Virgen de la Victoria , 29010 Málaga, Spain
| | - Javier Delgado-Lista
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Pablo Pérez-Martínez
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Helen M Roche
- UCD Institute of Food & Health/UCD Conway Institute, School of Public Health and Population Sciences, University College Dublin , Dublin 4, Ireland
| | - José López-Miranda
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
| | - Antonio Camargo
- Lipids and Atherosclerosis Research Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba , 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III , 14004 Cordoba, Spain
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8
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Camargo A, Rangel-Zúñiga OA, Alcalá-Díaz J, Gomez-Delgado F, Delgado-Lista J, García-Carpintero S, Marín C, Almadén Y, Yubero-Serrano EM, López-Moreno J, Tinahones FJ, Pérez-Martínez P, Roche HM, López-Miranda J. Dietary fat may modulate adipose tissue homeostasis through the processes of autophagy and apoptosis. Eur J Nutr 2017; 56:1621-1628. [PMID: 27029919 DOI: 10.1007/s00394-016-1208-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 03/17/2016] [Indexed: 01/09/2023]
Abstract
PURPOSE Obesity increases the risk of cardiovascular disease, type 2 diabetes mellitus and cancer development. Autophagy and apoptosis are critical processes for development and homeostasis in multicellular organisms and have been linked to a variety of disorders. We aimed to investigate whether the quantity and quality of dietary fat can influence these processes in the adipose tissue of obese people. METHODS A randomized, controlled trial within the LIPGENE study assigned 39 obese people with metabolic syndrome to 1 of 4 diets: (a) a high-saturated fatty acid diet, (b) a high-monounsaturated fatty acid (HMUFA) diet, and (c, d) two low-fat, high-complex carbohydrate diets supplemented with long-chain n-3 polyunsaturated fatty acids (LFHCC n-3) or placebo (LFHCC), for 12 weeks each. RESULTS We found an increase in the expression of autophagy-related BECN1 and ATG7 genes after the long-term consumption of the HMUFA diet (p = 0.001 and p = 0.004, respectively) and an increase in the expression of the apoptosis-related CASP3 gene after the long-term consumption of the LFHCC and LFHCC n-3 diets (p = 0.001 and p = 0.029, respectively). CASP3 and CASP7 gene expression changes correlated with HOMA index. CONCLUSION Our results suggest that the processes of autophagy and apoptosis in adipose tissue may be modified by diet and that the consumption of a diet rich in monounsaturated fat may contribute to adipose tissue homeostasis by increasing autophagy. They also reinforce the notion that apoptosis in adipose tissue is linked to insulin resistance. CLINICAL TRIAL REGISTRATION NUMBER ClinicalTrials.gov NCT00429195.
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Affiliation(s)
- A Camargo
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - O A Rangel-Zúñiga
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - J Alcalá-Díaz
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - F Gomez-Delgado
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - J Delgado-Lista
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - S García-Carpintero
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - C Marín
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - Y Almadén
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - E M Yubero-Serrano
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - J López-Moreno
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - F J Tinahones
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
- Endocrinology and Nutrition Service, Hospital Virgen de la Victoria, Malaga, Spain
| | - P Pérez-Martínez
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - H M Roche
- UCD Institute of Food and Health, UCD Conway Institute, School of Public Health and Population Sciences, University College Dublin, Dublin, UK
| | - J López-Miranda
- Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Cordoba, Av. Menendez Pidal, s/n, 14004, Córdoba, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain.
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Bargut TCL, Souza-Mello V, Mandarim-de-Lacerda CA, Aguila MB. Fish oil diet modulates epididymal and inguinal adipocyte metabolism in mice. Food Funct 2016; 7:1468-76. [PMID: 26876019 DOI: 10.1039/c5fo00909j] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We aimed to investigate the impact of different high-fat diets containing fish oil on adiposity and white adipose tissue (WAT) function in mice, comparing the effects on epididymal (eWAT) and subcutaneous (sWAT) depots. For this, we used C57BL/6 male mice fed four types of diets for eight weeks: standard chow (SC), high-fat lard (HF-L), high-fat lard plus fish oil (HF-L + FO), and high-fat fish oil (HF-FO). The HF-L group had a greater body mass (BM) gain, insulin resistance, increased gene expression related to lipogenesis (CD36, aP2, SREBP1c, and FAS), decreased gene expression of perilipin in both eWAT and sWAT, and reduced expression of genes related to beta-oxidation (CPT-1a) and to mitochondrial biogenesis (PGC1alpha, NRF1, and TFAM) in eWAT and sWAT. On the other hand, the HF-L + FO and HF-FO groups showed a smaller BM gain and adiposity, and normalization of insulin resistance and lipogenic genes in both eWAT and sWAT. These animals also showed decreased perilipin gene expression and elevated expression of beta-oxidation and mitochondrial biogenesis genes in eWAT and sWAT. 'Beige' adipocytes were identified in sWAT of the HF-FO animals. In conclusion, fish oil intake has anti-obesity effects through modulation of both eWAT and sWAT metabolism in mice and is relevant in diminishing the BM gain, adiposity, and insulin resistance even in combination with a high-fat lard diet in mice.
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Affiliation(s)
- Thereza Cristina Lonzetti Bargut
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Vanessa Souza-Mello
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Carlos Alberto Mandarim-de-Lacerda
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Marcia Barbosa Aguila
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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Paniagua JA. Nutrition, insulin resistance and dysfunctional adipose tissue determine the different components of metabolic syndrome. World J Diabetes 2016; 7:483-514. [PMID: 27895819 PMCID: PMC5107710 DOI: 10.4239/wjd.v7.i19.483] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 08/16/2016] [Accepted: 09/07/2016] [Indexed: 02/05/2023] Open
Abstract
Obesity is an excessive accumulation of body fat that may be harmful to health. Today, obesity is a major public health problem, affecting in greater or lesser proportion all demographic groups. Obesity is estimated by body mass index (BMI) in a clinical setting, but BMI reports neither body composition nor the location of excess body fat. Deaths from cardiovascular diseases, cancer and diabetes accounted for approximately 65% of all deaths, and adiposity and mainly abdominal adiposity are associated with all these disorders. Adipose tissue could expand to inflexibility levels. Then, adiposity is associated with a state of low-grade chronic inflammation, with increased tumor necrosis factor-α and interleukin-6 release, which interfere with adipose cell differentiation, and the action pattern of adiponectin and leptin until the adipose tissue begins to be dysfunctional. In this state the subject presents insulin resistance and hyperinsulinemia, probably the first step of a dysfunctional metabolic system. Subsequent to central obesity, insulin resistance, hyperglycemia, hypertriglyceridemia, hypoalphalipoproteinemia, hypertension and fatty liver are grouped in the so-called metabolic syndrome (MetS). In subjects with MetS an energy balance is critical to maintain a healthy body weight, mainly limiting the intake of high energy density foods (fat). However, high-carbohydrate rich (CHO) diets increase postprandial peaks of insulin and glucose. Triglyceride-rich lipoproteins are also increased, which interferes with reverse cholesterol transport lowering high-density lipoprotein cholesterol. In addition, CHO-rich diets could move fat from peripheral to central deposits and reduce adiponectin activity in peripheral adipose tissue. All these are improved with monounsaturated fatty acid-rich diets. Lastly, increased portions of ω-3 and ω-6 fatty acids also decrease triglyceride levels, and complement the healthy diet that is recommended in patients with MetS.
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Vargas Hernández JE. Nutrigenómica humana: efectos de los alimentos o sus componentes sobre la expresión RNA. REVISTA DE LA FACULTAD DE MEDICINA 2016. [DOI: 10.15446/revfacmed.v64n2.51080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
<p>Los resultados del proyecto del genoma humano fueron el punto de partida de grandes avances técnicos, metodológicos y conceptuales en la ciencia de la genética. Hoy en día es claro que el DNA es una molécula compleja que presenta diversas interacciones dinámicas consigo misma y con otros componentes del entorno celular. Asimismo, se sabe que el RNA es una molécula fundamental para el entendimiento de las características del organismo y de la respuesta de este a los estímulos del medioambiente. Además, los mecanismos epigenéticos conjugan todos los eventos moleculares que determinan cuáles serán los rasgos —anatómicos, fisiológicos, metabólicos, etc.— particulares de una entidad biológica definida. Todos los aspectos mencionados antes ofrecen la oportunidad de estudiar el conjunto de interacciones existentes entre el genoma y la dieta, lo cual es muy relevante dado que la ingesta de alimentos —o de los componentes contenidos o derivados de los mismos— es uno de los factores del entorno más importantes a los que está expuesto un individuo a lo largo de su vida, puesto que es capaz de condicionar positiva o negativamente el estado de salud. El presente artículo tiene el propósito de dar un panorama general de los aspectos básicos que integran el concepto nutrigénomica y proporcionar un estado del arte actualizado de algunos de los estudios realizados en este campo in vivo en humanos.</p>
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Todorčević M, Hodson L. The Effect of Marine Derived n-3 Fatty Acids on Adipose Tissue Metabolism and Function. J Clin Med 2015; 5:jcm5010003. [PMID: 26729182 PMCID: PMC4730128 DOI: 10.3390/jcm5010003] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 12/14/2015] [Accepted: 12/22/2015] [Indexed: 12/19/2022] Open
Abstract
Adipose tissue function is key determinant of metabolic health, with specific nutrients being suggested to play a role in tissue metabolism. One such group of nutrients are the n-3 fatty acids, specifically eicosapentaenoic acid (EPA; 20:5n-3) and docosahexaenoic acid (DHA; 22:6n-3). Results from studies where human, animal and cellular models have been utilised to investigate the effects of EPA and/or DHA on white adipose tissue/adipocytes suggest anti-obesity and anti-inflammatory effects. We review here evidence for these effects, specifically focusing on studies that provide some insight into metabolic pathways or processes. Of note, limited work has been undertaken investigating the effects of EPA and DHA on white adipose tissue in humans whilst more work has been undertaken using animal and cellular models. Taken together it would appear that EPA and DHA have a positive effect on lowering lipogenesis, increasing lipolysis and decreasing inflammation, all of which would be beneficial for adipose tissue biology. What remains to be elucidated is the duration and dose required to see a favourable effect of EPA and DHA in vivo in humans, across a range of adiposity.
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Affiliation(s)
- Marijana Todorčević
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Churchill Hospital, OX3 7LE Oxford, UK.
| | - Leanne Hodson
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Churchill Hospital, OX3 7LE Oxford, UK.
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Glycerol Production from Glucose and Fructose by 3T3-L1 Cells: A Mechanism of Adipocyte Defense from Excess Substrate. PLoS One 2015; 10:e0139502. [PMID: 26426115 PMCID: PMC4591265 DOI: 10.1371/journal.pone.0139502] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 09/12/2015] [Indexed: 12/28/2022] Open
Abstract
Cultured adipocytes (3T3-L1) produce large amounts of 3C fragments; largely lactate, depending on medium glucose levels. Increased glycolysis has been observed also in vivo in different sites of rat white adipose tissue. We investigated whether fructose can substitute glucose as source of lactate, and, especially whether the glycerol released to the medium was of lipolytic or glycolytic origin. Fructose conversion to lactate and glycerol was lower than that of glucose. The fast exhaustion of medium glucose was unrelated to significant changes in lipid storage. Fructose inhibited to a higher degree than glucose the expression of lipogenic enzymes. When both hexoses were present, the effects of fructose on gene expression prevailed over those of glucose. Adipocytes expressed fructokinase, but not aldolase b. Substantive release of glycerol accompanied lactate when fructose was the substrate. The mass of cell triacylglycerol (and its lack of change) could not justify the comparatively higher amount of glycerol released. Consequently, most of this glycerol should be derived from the glycolytic pathway, since its lipolytic origin could not be (quantitatively) sustained. Proportionally (with respect to lactate plus glycerol), more glycerol was produced from fructose than from glucose, which suggests that part of fructose was catabolized by the alternate (hepatic) fructose pathway. Earlier described adipose glycerophophatase activity may help explain the glycolytic origin of most of the glycerol. However, no gene is known for this enzyme in mammals, which suggests that this function may be carried out by one of the known phosphatases in the tissue. Break up of glycerol-3P to yield glycerol, may be a limiting factor for the synthesis of triacylglycerols through control of glycerol-3P availability. A phosphatase pathway such as that described may have a potential regulatory function, and explain the production of glycerol by adipocytes in the absence of lipolytic stimulation.
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