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Lope V, Del Pozo MDP, Criado-Navarro I, Pérez-Gómez B, Pastor-Barriuso R, Ruiz E, Castelló A, Lucas P, Sierra Á, Salas-Trejo D, Llobet R, Martínez I, Romieu I, Chajès V, Priego-Capote F, Pollán M. Serum Phospholipid Fatty Acids and Mammographic Density in Premenopausal Women. J Nutr 2020; 150:2419-2428. [PMID: 32584993 DOI: 10.1093/jn/nxaa168] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/26/2020] [Accepted: 05/19/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The role of fatty acids (FAs) on mammographic density (MD) is unclear, and available studies are based on self-reported dietary intake. OBJECTIVES This study assessed the association between specific serum phospholipid fatty acids (PLFAs) and MD in premenopausal women. METHODS The cross-sectional study DDM-Madrid recruited 1392 Spanish premenopausal women, aged 39-50 y, who attended a screening in a breast radiodiagnosis unit of Madrid City Council. Women completed lifestyle questionnaires and FFQs. Percentage MD was estimated using a validated computer tool (DM-Scan), and serum PLFA percentages were measured by GC-MS. Multivariable linear regression models were used to quantify the association of FA tertiles with MD. Models were adjusted for age, education, BMI, waist circumference, parity, oral contraceptive use, previous breast biopsies, and energy intake, and they were corrected for multiple testing. RESULTS Women in the third tertile of SFAs showed significantly higher MD compared with those in the first tertile (βT3vsT1 = 7.53; 95% CI: 5.44, 9.61). Elevated relative concentrations of palmitoleic (βT3vsT1 = 3.12; 95% CI: 0.99, 5.25) and gondoic (βT3vsT1 = 2.67; 95% CI: 0.57, 4.77) MUFAs, as well as high relative concentrations of palmitelaidic (βT3vsT1 = 5.22; 95% CI: 3.15, 7.29) and elaidic (βT3vsT1 = 2.69; 95% CI: 0.59, 4.79) trans FAs, were also associated with higher MD. On the contrary, women with elevated relative concentrations of n-6 (ω-6) linoleic (βT3vsT1 = -5.49; 95% CI; -7.62, -3.35) and arachidonic (βT3vsT1 = -4.68; 95% CI: -6.79, -2.58) PUFAs showed lower MD. Regarding desaturation indices, an elevated palmitoleic to palmitic ratio and a low ratio of oleic to steric and arachidonic to dihomo-γ-linolenic acids were associated with higher MD. CONCLUSIONS Spanish premenopausal women with high relative concentrations of most SFAs and some MUFAs and trans FAs showed an increased MD, whereas those with high relative concentrations of some n-6 PUFAs presented lower density. These results, which should be confirmed in further studies, underscore the importance of analyzing serum FAs individually.
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Affiliation(s)
- Virginia Lope
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - María Del Pilar Del Pozo
- Department of Preventive Medicine, Public Health, and Microbiology, Autonomous University of Madrid, Madrid, Spain
| | - Inmaculada Criado-Navarro
- Department of Analytical Chemistry, Annex Marie Curie Building, Campus of Rabanales, University of Cordoba, Cordoba, Spain
- Maimónides Institute of Biomedical Research, Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Beatriz Pérez-Gómez
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Roberto Pastor-Barriuso
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Emma Ruiz
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Adela Castelló
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
- Faculty of Medicine, University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - Pilar Lucas
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Ángeles Sierra
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Dolores Salas-Trejo
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
- Valencian Breast Cancer Screening Program, General Directorate of Public Health, Valencia, Spain
- Center for Public Health Research CSISP, FISABIO, Valencia, Spain
| | - Rafael Llobet
- Institute of Computer Technology, Polytechnic University of Valencia, Valencia, Spain
| | - Inmaculada Martínez
- Valencian Breast Cancer Screening Program, General Directorate of Public Health, Valencia, Spain
- Center for Public Health Research CSISP, FISABIO, Valencia, Spain
| | - Isabelle Romieu
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca, Mexico
- Huber Department of Global Health, Emory University, Atlanta, GA, USA
| | - Véronique Chajès
- Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon, France
| | - Feliciano Priego-Capote
- Department of Analytical Chemistry, Annex Marie Curie Building, Campus of Rabanales, University of Cordoba, Cordoba, Spain
- Maimónides Institute of Biomedical Research, Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
| | - Marina Pollán
- Cancer and Environmental Epidemiology Unit, Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, Madrid, Spain
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
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del Pozo MDP, Lope V, Criado-Navarro I, Pastor-Barriuso R, Fernández de Larrea N, Ruiz E, Castelló A, Lucas P, Sierra Á, Romieu I, Chajès V, Priego-Capote F, Pérez-Gómez B, Pollán M. Serum Phospholipid Fatty Acids Levels, Anthropometric Variables and Adiposity in Spanish Premenopausal Women. Nutrients 2020; 12:E1895. [PMID: 32630591 PMCID: PMC7353394 DOI: 10.3390/nu12061895] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/16/2020] [Accepted: 06/23/2020] [Indexed: 02/05/2023] Open
Abstract
This study investigates the still uncertain association between serum phospholipid fatty acids (PL-FA), and anthropometric and adiposity variables. A cross-sectional study was conducted with 1443 Spanish premenopausal women. Participants answered an epidemiological and a food frequency questionnaire. Anthropometric variables were measured using a bioimpedance scale. Serum PL-FAs levels were determined by gas chromatography-mass spectrometry. The association between body mass index (BMI), weight gain, body fat percentage, visceral fat index, and waist circumference with serum PL-FAs and desaturation indices was evaluated using multivariable linear regression models. BMI was positively associated with the relative concentration of saturated fatty acids (SFAs) (β = 0.94, q-val = 0.001), and with palmitoleic, dihomo-γ-linolenic (DGLA), arachidonic (AA) and α-linolenic acids, and was inversely associated with oleic, gondoic, trans-vaccenic, linoleic and γ-linolenic acids. Total fat percentage was positively associated with DGLA and AA, and inversely with linoleic and γ-linolenic acids. Low relative concentrations of some SFAs and high levels of n-6 PUFAs were associated with greater waist circumference. While the oleic/stearic and AA/DGLA acid ratios were inversely associated with BMI, DGLA/linoleic acid ratio was positively related to almost all variables. In addition to BMI, total fat percentage and waist circumference were also associated with certain individual fatty acids.
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Affiliation(s)
- María del Pilar del Pozo
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain;
| | - Virginia Lope
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Inmaculada Criado-Navarro
- Department of Analytical Chemistry, Annex Marie Curie Building, Campus of Rabanales, University of Córdoba, 14014 Córdoba, Spain; (I.C.-N.); (F.P.-C.)
- Maimónides Institute of Biomedical Research (IMIBIC), Reina Sofia University Hospital, 14004 Córdoba, Spain
| | - Roberto Pastor-Barriuso
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Nerea Fernández de Larrea
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Emma Ruiz
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Adela Castelló
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
- Faculty of Medicine, University of Alcalá, Alcalá de Henares, 28871 Madrid, Spain
| | - Pilar Lucas
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
| | - Ángeles Sierra
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Isabelle Romieu
- Center for Research on Population Health, National Institute of Public Health, Cuernavaca 62100, Mexico;
- Huber Department of Global Health, Emory University, Atlanta, GA 30329, USA
| | - Véronique Chajès
- Section of Nutrition and Metabolism, International Agency for Research on Cancer, 69008 Lyon, France;
| | - Feliciano Priego-Capote
- Department of Analytical Chemistry, Annex Marie Curie Building, Campus of Rabanales, University of Córdoba, 14014 Córdoba, Spain; (I.C.-N.); (F.P.-C.)
- Maimónides Institute of Biomedical Research (IMIBIC), Reina Sofia University Hospital, 14004 Córdoba, Spain
| | - Beatriz Pérez-Gómez
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
| | - Marina Pollán
- Department of Epidemiology of Chronic Diseases, National Center for Epidemiology, Carlos III Institute of Health, 28029 Madrid, Spain; (R.P.-B.); (N.F.d.L.); (E.R.); (A.C.); (P.L.); (Á.S.); (B.P.-G.); (M.P.)
- Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, 28029 Madrid, Spain
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Currò S, Manuelian CL, De Marchi M, Claps S, Rufrano D, Neglia G. Effects of Breed and Stage of Lactation on Milk Fatty Acid Composition of Italian Goat Breeds. Animals (Basel) 2019; 9:E764. [PMID: 31623398 PMCID: PMC6826614 DOI: 10.3390/ani9100764] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 01/02/2023] Open
Abstract
Fatty acid (FA) profile plays an important role on human health and on sensory quality of dairy products. There is few information about breed influence on milk FA profile of local goat breeds. This study aimed to characterize and compare the milk FA profile of 5 local endangered goat breeds (Garganica, Girgentana, Jonica, Maltese, and Mediterranean Red) and a cosmopolitan breed (Saanen) reared in the same farm during a complete lactation. A total of 252 milk samples were collected monthly from 42 goats (7 goats per breed) and analyzed for gross composition and FA profile. Individual FA was determined using gas-chromatography. Data were analyzed using a mixed model with repeated measures with breed and week of lactation as fixed effects. Results showed that the FA profile was significantly affected by week of lactation and only few FA by breed effect (p < 0.05). Overall, the main differences were found between Saanen and local breeds. This study contributed to the characterization of goat milk FA profile, and it may be of interest for the valorization of milk from local goat breeds which seem to have a healthier profile than milk of the cosmopolitan breed.
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Affiliation(s)
- Sarah Currò
- Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova, 35020 Legnaro (PD), Italy.
| | - Carmen L Manuelian
- Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova, 35020 Legnaro (PD), Italy.
| | - Massimo De Marchi
- Department of Agronomy, Food, Natural resources, Animals and Environment, University of Padova, 35020 Legnaro (PD), Italy.
| | - Salvatore Claps
- Council for Agricultural Research and Agricultural Economy Analysis-Research Centre for Animal Production and Aquaculture, 85051 Bella Muro (PZ), Italy.
| | - Domenico Rufrano
- Council for Agricultural Research and Agricultural Economy Analysis-Research Centre for Animal Production and Aquaculture, 85051 Bella Muro (PZ), Italy.
| | - Gianluca Neglia
- Department of Veterinary Medicine and Animal Production (DMVPA), University of Naples Federico II, Naples, 80137 Napoli, Italy.
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Wellington G, Campbell A, Elder D. Intermittent hypoxia in preterm infants: Measurement using the desaturation index. Pediatr Pulmonol 2019; 54:865-872. [PMID: 30924319 DOI: 10.1002/ppul.24276] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 01/21/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The aims of this study were to: (i) Determine in preterm infants at neonatal discharge the prevalence of intermittent hypoxia (IH), as measured by the oxygen desaturation index (DSI) recorded by pulse oximetry and (ii) Determine the change in values for very preterm infants at 1-month post discharge. METHODS Preterm infants were recruited from the Wellington regional neonatal intensive care unit (NICU) and 24-h pulse oximetry recordings performed immediately before discharge. Infants born <32 weeks gestational age (GA) had repeat oximetry 1-month post discharge. Oxygenation measures included the 3% and 4% desaturation (DSI 3%, DSI 4%) indices. RESULTS At discharge from the neonatal unit the median and interquartile range (IQR) for DSI 4% was 51 (31-74) events per hour with normal mean SpO2 (median of 97.9% [97.2-98.8 IQR]). Episodes of IH 1 month post discharge decreased with improvements of between 42% and 57% seen for the three DSI measures. Infants <32 weeks GA had higher median DSI 3 and 4% values at discharge but differences when compared with late preterm infants were not significant. CONCLUSIONS Preterm infants have frequent episodes of IH as measured by the 3% and 4% DSI when deemed otherwise ready for discharge home. Further research in a larger cohort of very preterm infants and also in term infants is needed to determine the significance of this finding.
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Affiliation(s)
- Grace Wellington
- Department of Paediatrics and Child Health, University of Otago, Wellington, New Zealand
| | - Angela Campbell
- Department of , Medicine, University of Otago, Wellington, New Zealand
| | - Dawn Elder
- Department of Paediatrics and Child Health, University of Otago, Wellington, New Zealand
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Wiebracht ND, He S, Cotton C, Meinzen-Derr J, Shott G, Smith DF, McConnell KB, Ishman SL. Polysomnographic Oxygen Saturation Findings for Preteen Children versus Adolescents. Otolaryngol Head Neck Surg 2017; 158:187-193. [PMID: 29205091 DOI: 10.1177/0194599817733687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 11/17/2022]
Abstract
Objective Home oximetry is commonly used to screen for obstructive sleep apnea (OSA) in children; however, normal oxygen desaturation levels by disease severity are not well known. It was our objective to determine if oxygen saturation levels differed by OSA severity category in children and if these differences were similar for preteen children and adolescents. Study Design Retrospective case series of children undergoing polysomnography from September 2011 to July 2015. Setting Tertiary pediatric hospital. Subjects and Methods Six- to 18-year-olds (preteen, 6-12 years old; adolescent, 13-18 years old). Chi-square, Wilcoxon rank sum test, and Kruskal-Wallis testing were used to compare variables between age groups. Results The study included 342 children with a mean age of 11.3 ± 2.4 years (range, 6.5-17.5) and a mean body mass index of 25.6 ± 9.2 kg/m2 (78 ± 29 percentile); 61% were white, 35% were black, and 4% were other or unknown. Of the children, 48% were female, and this was not a significant difference between age groups ( P = .81). Overall, 50% of the children had no OSA, 32% mild, 10% moderate, and 8% severe. When compared with the younger children, the adolescents had a longer sleep time ( P = .014) and a higher mean obstructive apnea-hypopnea index (3.53 ± 5.1 vs 3.03 ± 6.1 events per hour, P = .02). The 3% and 4% oxygen desaturation indices were not significantly different between age groups when accounting for OSA severity. Conclusion Adolescents have longer sleep times and higher obstructive apnea-hypopnea indexes than preteens, but oxygen saturations and desaturation indices were similar. This supports current triage algorithms for children with OSA, as we found no significant age-based differences.
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Affiliation(s)
- Nathan D Wiebracht
- 1 Department of Otolaryngology-Head and Neck Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Shan He
- 2 Division of Pediatric Otolaryngology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,3 Department of Otolaryngology, Shanghai Children's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Colin Cotton
- 2 Division of Pediatric Otolaryngology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Jareen Meinzen-Derr
- 2 Division of Pediatric Otolaryngology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,4 Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Gordon Shott
- 1 Department of Otolaryngology-Head and Neck Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - David F Smith
- 2 Division of Pediatric Otolaryngology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,5 Division of Pulmonary and Sleep Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Keith B McConnell
- 5 Division of Pulmonary and Sleep Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,6 Department of Electrical Engineering, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Stacey L Ishman
- 1 Department of Otolaryngology-Head and Neck Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA.,2 Division of Pediatric Otolaryngology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,5 Division of Pulmonary and Sleep Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
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Aglago EK, Biessy C, Torres-Mejía G, Angeles-Llerenas A, Gunter MJ, Romieu I, Chajès V. Association between serum phospholipid fatty acid levels and adiposity in Mexican women. J Lipid Res 2017; 58:1462-1470. [PMID: 28465289 PMCID: PMC5496042 DOI: 10.1194/jlr.p073643] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 04/23/2017] [Indexed: 12/31/2022] Open
Abstract
Fatty acids (FAs) have been postulated to impact adiposity, but few epidemiological studies addressing this hypothesis have been conducted. This study investigated the association between serum phospholipid FAs (S-PLFAs) and indicators of obesity. BMI and waist-to-hip ratio (WHR) were collected from 372 healthy Mexican women included as controls in a case-control study. S-PLFA percentages were determined through gas chromatography. Desaturation indices, SCD-16, SCD-18, FA desaturase (FADS)1, and FADS2, biomarkers of endogenous metabolism, were proxied respectively as 16:1n-7/16:0, 18:1n-9/18:0, 20:4n-6/20:3n-6, and 22:6n-3/20:5n-3. Multiple linear regressions adjusted for relevant confounders and corrected for multiple testing were conducted to determine the association between S-PLFA, desaturation indices, and indicators of adiposity. SCD-16 (β = 0.034, P = 0.001, q = 0.014), palmitoleic acid (β = 0.031, P = 0.001, q = 0.014), and dihomo-γ-linolenic acid (β = 0.043, P = 0.000, q = 0.0002) were positively associated with BMI. Total n-6 PUFAs (β = 1.497, P = 0.047, q = 0.22) and the ratio of n-6/n-3 PUFAs (β = 0.034, P = 0.040, q = 0.19) were positively associated with WHR, while odd-chain FAs (pentadecanoic and heptadecanoic acid) showed negative associations with all the adiposity indicators. In conclusion, increased endogenous synthesis of palmitoleic acid and a high n-6/n-3 ratio are associated with increased adiposity, while odd-chain FAs are associated with decreased adiposity. Further studies are needed to determine the potential causality behind these associations.
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Affiliation(s)
- Elom K Aglago
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC/WHO), Lyon, France.
| | - Carine Biessy
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Gabriela Torres-Mejía
- National Institute of Public Health, Center for Population Health Research, Cuernavaca Morelos, Mexico
| | - Angélica Angeles-Llerenas
- National Institute of Public Health, Center for Population Health Research, Cuernavaca Morelos, Mexico
| | - Marc J Gunter
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Isabelle Romieu
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Veronique Chajès
- Nutrition and Metabolism Section, International Agency for Research on Cancer (IARC/WHO), Lyon, France
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Harasim-Symbor E, Konstantynowicz-Nowicka K, Chabowski A. Additive effects of dexamethasone and palmitate on hepatic lipid accumulation and secretion. J Mol Endocrinol 2016; 57:261-273. [PMID: 27707773 DOI: 10.1530/jme-16-0108] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 09/20/2016] [Indexed: 01/03/2023]
Abstract
Synthetic and natural glucocorticoids are able to highly modify liver lipid metabolism, which is possibly associated with nonalcoholic fatty liver disease development. We have assessed the changes in lipid and sphingolipid contents in hepatocytes, lipid composition and saturation status as well as the expression of proteins involved in fatty acid transport after both dexamethasone and palmitate treatments. The experiments were conducted on primary rat hepatocytes, incubated with dexamethasone and/or palmitic acid during short (16 h) and prolonged (40 h) exposure. Intracellular and extracellular lipid and sphingolipid contents were assessed by gas liquid chromatography and high-performance liquid chromatography, respectively. The expression of selected proteins was estimated by Western blotting. Short and prolonged exposure to dexamethasone combined with palmitic acid resulted in increased expression of fatty acid transporters, which was subsequently reflected by excessive intracellular accumulation of triacylglycerols and ceramide. The expression of microsomal transfer protein and cassette transporter was also significantly increased after dexamethasone and palmitate treatment, which was in accordance with elevated extracellular lipid and sphingolipid contents. Our data showed additive effects of dexamethasone and palmitate on protein-dependent fatty acid uptake in primary hepatocytes, resulting in the increased accumulation of triacylglycerols and sphingolipids. Moreover, the combined treatment altered fatty acid composition and diminished triacylglycerols desaturation index. Importantly, we observed that additive effects on both increased microsomal transport protein expression as well as elevated export of triacylglycerols, which may be relevant as a liver protective mechanism.
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Affiliation(s)
- Ewa Harasim-Symbor
- Department of PhysiologyMedical University of Bialystok, Białsytok, Podlaskie, Poland
| | | | - Adrian Chabowski
- Department of PhysiologyMedical University of Bialystok, Białsytok, Podlaskie, Poland
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Abstract
Stearoyl-CoA desaturase-1 (SCD1) converts saturated fatty acids (SFA) into monounsaturated fatty acids and is necessary for proper liver, adipose tissue, and skeletal muscle lipid metabolism. While there is a wealth of information regarding SCD1 expression in the liver, research on its effect in skeletal muscle is scarce. Furthermore, the majority of information about its role is derived from global knockout mice, which are known to be hypermetabolic and fail to accumulate SCD1's substrate, SFA. We now know that SCD1 expression is important in regulating lipid bilayer fluidity, increasing triglyceride formation, and enabling lipogenesis and may protect against SFA-induced lipotoxicity. Exercise has been shown to increase SCD1 expression, which may contribute to an increase in intramyocellular triglyceride at the expense of free fatty acids and diacylglycerol. This review is intended to define the role of SCD1 in skeletal muscle and discuss the potential benefits of its activity in the context of lipid metabolism, insulin sensitivity, exercise training, and obesity.
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Dumitrache-Rujinski S, Calcaianu G, Zaharia D, Toma CL, Bogdan M. The role of overnight pulse-oximetry in recognition of obstructive sleep apnea syndrome in morbidly obese and non obese patients. Maedica (Bucur) 2013; 8:237-242. [PMID: 24371491 PMCID: PMC3869111] [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] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Accepted: 08/01/2013] [Indexed: 06/03/2023]
Abstract
MATERIAL AND METHODS We prospectively evaluated 199 individuals with high pre-test clinical suspicion of OSAS. Of these, 123 patients were morbidly obese (Group A) and 76 were non-obese (Group B). We performed six channel cardio-respiratory polygraphy and assessed the correlation between the Desaturation Index (DI) and the Apnea Hypopnea Index (AHI) for both groups. RESULTS In group A: 116 patients (94.3%) were diagnosed with OSAS (AHI>5/hour); mean age: 59.4±10.9 years; mean BMI: 44.8±4.9 kg/m(2). The mean DI was 47.2±27.6/hour and the mean AHI: 46.5±27.6/hour. Mean average SaO2 was 88.5±6.3 %. In group B, 65 patients (85.52%) were diagnosed with SAS; mean age: 51.2 ± 12.7 years; mean BMI: 27.24±2.2 kg/m(2).The mean DI was 23.12 ± 18.35/hour and the mean AHI: 28.8 ± 18.5/hour. Mean average SaO2 was 93.7±2.07 %.A significant positive correlation (correlation index rA = 0.863 and rB= 0.877) was found between DI and AHI in both groups (p<0.001). CONCLUSION Assessment of the Desaturation Index by nocturnal pulse-oximetry maintains its utility as a screening method for OSAS in both obese and non-obese patients with high clinical pre-test suspicion, despite the fact that the basal nocturnal saturation was found to be lower in group A.
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Affiliation(s)
- Stefan Dumitrache-Rujinski
- "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania ; "Marius Nasta" Institute of Pneumology, Bucharest, Romania
| | | | - Dragos Zaharia
- "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania ; "Marius Nasta" Institute of Pneumology, Bucharest, Romania
| | - Claudia Lucia Toma
- "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania ; "Marius Nasta" Institute of Pneumology, Bucharest, Romania
| | - Miron Bogdan
- "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania ; "Marius Nasta" Institute of Pneumology, Bucharest, Romania
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Subbaiah PV, Gould IG, Lal S, Aizezi B. Incorporation profiles of conjugated linoleic acid isomers in cell membranes and their positional distribution in phospholipids. Biochim Biophys Acta 2011; 1811:17-24. [PMID: 20920595 PMCID: PMC2997919 DOI: 10.1016/j.bbalip.2010.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Revised: 09/20/2010] [Accepted: 09/27/2010] [Indexed: 10/19/2022]
Abstract
Although the conjugated linoleic acids (CLA) have several isomer-specific biological effects including anti-carcinogenic and anti-adipogenic effects, their mechanisms of action remain unclear. To determine their potential effects on membrane structure and function, we studied the incorporation profiles of four CLA isomers (trans-10 cis-12 (A), trans-9 trans-11 (B), cis-9 trans-11 (C), and cis-9 cis-11 (D)) in CHO and HepG2 cells. All four isomers were incorporated into cellular lipids as efficiently as linoleic acid (LA), with the majority of the incorporated CLA present in membrane rafts. Of the four isomers, only CLA-A increased the cholesterol content of the raft fraction. Over 50% of the incorporated CLAs were recovered in phosphatidylcholine of CHO cells, but in HepG2 the neutral lipids contained the majority of CLA. The desaturation index (18:1/18:0 and 16:1/16:0) was reduced by CLA-A, but increased by CLA-B, the effects being apparent mostly in raft lipids. The Δ⁹ desaturase activity was inhibited by CLAs A and C. Unlike LA, which was mostly found in the sn-2 position of phospholipids, most CLAs were also incorporated significantly into the sn-1 position in both cell types. These studies show that the incorporation profiles of CLA isomers differ significantly from that of LA, and this could lead to alterations in membrane function, especially in the raft-associated proteins.
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