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von Deneen KM, Qin W, Liu P, Dong M, Chen P, Xie H, Zhang Y, Gold MS, Liu Y, Tian J. Connectivity Study of the Neuromechanism of Acute Acupuncture Needling during fMRI in "Overweight" Subjects. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2015; 2015:384389. [PMID: 25821486 PMCID: PMC4363637 DOI: 10.1155/2015/384389] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 12/29/2014] [Accepted: 12/29/2014] [Indexed: 11/18/2022]
Abstract
This functional connectivity study depicts how acupoints ST 36 and SP 9 and their sham acupoints acutely act on blood glucose (GLU), core body temperature (CBT), hunger, and sensations pertaining to needling (De-qi) via the limbic system and dopamine (DA) to affect various brain areas in fasting, adult, and "overweight" Chinese males using functional magnetic resonance imaging. Functional connectivity (FC) analysis utilized the amygdala (AMY) and hypothalamus (HYP) as regions of interest (ROIs) in the discrete cosine transform and seed correlation analysis methods. There was a significant difference in the spatial patterns of the distinct brain regions between groups. Correlation results showed that increased HYP-hippocampus FC after ACU was positively correlated with ACU-induced change in CBT; increased HYP-putamen-insula FC after ACU was positively correlated with ACU-induced change in GLU; and increased HYP-anterior cingulate cortex FC after ACU was positively correlated with ACU-induced change in HUNGER suggesting that increased DA modulation during ACU was probably associated with increased poststimulation limbic system and spinothalamic tract connectivity. Decreased HYP-thalamus FC after ACU was negatively correlated or anticorrelated with ACU-induced change in HUNGER suggesting that increased DA modulation during ACU was possibly associated with decreased poststimulation limbic system and spinothalamic tract connectivity. No correlation was found for min SHAM. This was an important study in addressing acute acupuncture effects and neural pathways involving physiology and appetite regulation in overweight individuals.
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Affiliation(s)
- Karen M. von Deneen
- School of Life Science and Technology, Xidian University, Xi'an 710071, China
- Department of Psychiatry & McKnight Brain Institute, University of Florida, 1149 S. Newell Dr. L4-100K, Gainesville, FL 32610, USA
| | - Wei Qin
- School of Life Science and Technology, Xidian University, Xi'an 710071, China
| | - Peng Liu
- School of Life Science and Technology, Xidian University, Xi'an 710071, China
| | - Minghao Dong
- School of Life Science and Technology, Xidian University, Xi'an 710071, China
| | - Peng Chen
- Beijing University of Chinese Medicine, Beijing 100029, China
| | - Huisheng Xie
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, P.O. Box 100126 2015 SW 16th Avenue, Gainesville, FL 32610, USA
| | - Yi Zhang
- School of Life Science and Technology, Xidian University, Xi'an 710071, China
| | - Mark S. Gold
- Department of Psychiatry & McKnight Brain Institute, University of Florida, 1149 S. Newell Dr. L4-100K, Gainesville, FL 32610, USA
| | - Yijun Liu
- Department of Psychiatry & McKnight Brain Institute, University of Florida, 1149 S. Newell Dr. L4-100K, Gainesville, FL 32610, USA
| | - Jie Tian
- School of Life Science and Technology, Xidian University, Xi'an 710071, China
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Abstract
High intensity, low-energy sweeteners (LES) are used by many consumers in order to limit energy intake and possibly facilitate body weight control. These beneficial effects are often questioned in the scientific and lay media. LES are frequently accused of stimulating and/or maintaining a liking for sweetness which in turn would be deleterious for adequate body weight control. Evidence for the specific effects of LES use on appetite for sweet products will be extracted from observational studies, experimental laboratory studies, randomized controlled trials, and finally brain imaging studies. While many of the existing studies cannot identify any causal links between use of LES and appetite for sweetness, randomized trials in children and adults suggest that use of LES tends to reduce rather than increase the intake of sugar-containing foods and to facilitate, rather than impair, weight loss.
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Affiliation(s)
- France Bellisle
- Université Paris 13, Epidémiologie Nutritionnelle, Centre de Recherche en Nutrition Humaine d’Ile-de-France, U1153 INSERM, U1125 INRA, CNAM, 74 rue Marcel Cachin, 93017 Bobigny cedex, France
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Yasoshima Y, Yoshizawa H, Shimura T, Miyamoto T. The basolateral nucleus of the amygdala mediates caloric sugar preference over a non-caloric sweetener in mice. Neuroscience 2015; 291:203-15. [PMID: 25684750 DOI: 10.1016/j.neuroscience.2015.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 02/03/2015] [Accepted: 02/04/2015] [Indexed: 11/19/2022]
Abstract
Neurobiological and genetic mechanisms underlying increased intake of and preference for nutritive sugars over non-nutritive sweeteners are not fully understood. We examined the roles of subnuclei of the amygdala in the shift in preference for a nutritive sugar. Food-deprived mice alternately received caloric sucrose (1.0 M) on odd-numbered training days and a non-caloric artificial sweetener (2.5 mM saccharin) on even-numbered training days. During training, mice with sham lesions of the basolateral (BLA) or central (CeA) nucleus of the amygdala increased their intake of 1.0 M sucrose, but not saccharin. Trained mice with sham lesions showed a significant shift in preference toward less concentrated sucrose (0.075 M) over the saccharin in a two-bottle choice test, although the mice showed an equivalent preference for these sweeteners before training. No increased intake of or preference for sucrose before and after the alternating training was observed in non-food-deprived mice. Excitotoxic lesions centered in the BLA impaired the increase in 1.0M sucrose intake and shift in preference toward 0.075 M sucrose over saccharin. Microlesions with iontophoretic excitotoxin injections into the CeA did not block the training-dependent changes. These results suggest that food-deprived animals selectively shift their preference for a caloric sugar over a non-caloric sweetener through the alternate consumption of caloric and non-caloric sweet substances. The present data also suggest that the BLA, but not CeA, plays a role in the selective shift in sweetener preference.
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Affiliation(s)
- Y Yasoshima
- Division of Behavioral Physiology, Department of Behavioral Sciences, Graduate School of Human Sciences, Osaka University, 1-2 Yamadaoka, Suita 565-0871, Japan.
| | - H Yoshizawa
- Division of Material and Biological Sciences, Graduate School of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan.
| | - T Shimura
- Division of Behavioral Physiology, Department of Behavioral Sciences, Graduate School of Human Sciences, Osaka University, 1-2 Yamadaoka, Suita 565-0871, Japan.
| | - T Miyamoto
- Division of Material and Biological Sciences, Graduate School of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan; Laboratory of Behavioral Neuroscience, Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan.
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104
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Maslova E, Halldorsson TI, Astrup A, Olsen SF. Dietary protein-to-carbohydrate ratio and added sugar as determinants of excessive gestational weight gain: a prospective cohort study. BMJ Open 2015; 5:e005839. [PMID: 25670731 PMCID: PMC4325128 DOI: 10.1136/bmjopen-2014-005839] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVE To examine the relation between the protein:carbohydrate (P/C) ratio and added sugar intake in pregnancy and gestational weight gain (GWG). DESIGN A prebirth cohort including 103 119 pregnancies enrolled between 1996 and 2003. SETTING All women in Denmark were eligible to participate if they spoke Danish and were planning to carry to term.The pregnant women were recruited and enrolled during their first antenatal visit (6-10 weeks of gestation). PARTICIPANTS Participants included women with live-born singletons and complete data on dietary intake and GWG, leaving 46 262 women for the analysis. EXPOSURE Macronutrient intake was quantified using a validated food frequency questionnaire administered in the 25th week of gestation. The P/C ratio and added sugar intake were examined in quintiles. PRIMARY OUTCOME MEASURES GWG was based on self-reported weight in gestational weeks 12 and 30 and defined as gain in g/week. We used multivariable linear regression, including adjusting for pre-pregnancy body mass index, to calculate relative change in GWG and 95% CI. RESULTS Average GWG was 471(224) g/week. The adjusted weight gain was 16 g/week lower (95% CI 9 to 22, p for trend <0.001) in the highest (Q5) versus lowest (Q1) quintile of the P/C ratio (∼3% average reduction across the entire pregnancy). Weight gain for those with >20%E vs <12%E from protein was 36 g/week lower (95% CI 20 to 53, p for trend <0.0001; ∼8% average reduction). A high P/C ratio was inversely related to intake of added sugars. Added sugar consumption was strongly associated with GWG (Q5 vs Q1: 34, 95% CI 28 to 40 g/week, p for trend <0.0001). CONCLUSIONS A high P/C ratio was associated with reduced GWG. This association appeared to be partly driven by a decrease in intake of added sugar. These results are consistent with randomised trials in non-pregnant participants. A dietary intervention targeting an increased P/C ratio with emphasis on reducing added sugar can contribute to reducing excessive GWG.
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Affiliation(s)
- Ekaterina Maslova
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institute, Copenhagen, Denmark
| | - Thorhallur I Halldorsson
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institute, Copenhagen, Denmark
- Faculty of Food Science and Nutrition, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Unit for Nutrition Research, Landspitali University Hospital, Reykjavik, Iceland
| | - Arne Astrup
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Sjurdur F Olsen
- Centre for Fetal Programming, Department of Epidemiology Research, Statens Serum Institute, Copenhagen, Denmark
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
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105
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Martire SI, Westbrook RF, Morris MJ. Effects of long-term cycling between palatable cafeteria diet and regular chow on intake, eating patterns, and response to saccharin and sucrose. Physiol Behav 2015; 139:80-8. [DOI: 10.1016/j.physbeh.2014.11.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 11/03/2014] [Accepted: 11/03/2014] [Indexed: 01/06/2023]
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Gugusheff JR, Ong ZY, Muhlhausler BS. The early origins of food preferences: targeting the critical windows of development. FASEB J 2014; 29:365-73. [PMID: 25466884 DOI: 10.1096/fj.14-255976] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The nutritional environment to which an individual is exposed during the perinatal period plays a crucial role in determining his or her future metabolic health outcomes. Studies in rodent models have demonstrated that excess maternal intake of high-fat and/or high-sugar "junk foods" during pregnancy and lactation can alter the development of the central reward pathway, particularly the opioid and dopamine systems, and program an increased preference for junk foods in the offspring. More recently, there have been attempts to define the critical windows of development during which the opioid and dopamine systems within the reward pathway are most susceptible to alteration and to determine whether it is possible to reverse these effects through nutritional interventions applied later in development. This review discusses the progress made to date in these areas, highlights the apparent importance of sex in determining these effects, and considers the potential implications of the findings from rodent models in the human context.
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Affiliation(s)
- Jessica Rose Gugusheff
- *FOODplus Research Centre, School of Agriculture Food and Wine, The University of Adelaide, Adelaide, South Australia, Australia; Sansom Institute for Health Research, School of Pharmacy and Medical Science, University of South Australia, Adelaide, South Australia, Australia; and Department of Psychology, The University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Zhi Yi Ong
- *FOODplus Research Centre, School of Agriculture Food and Wine, The University of Adelaide, Adelaide, South Australia, Australia; Sansom Institute for Health Research, School of Pharmacy and Medical Science, University of South Australia, Adelaide, South Australia, Australia; and Department of Psychology, The University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Beverly Sara Muhlhausler
- *FOODplus Research Centre, School of Agriculture Food and Wine, The University of Adelaide, Adelaide, South Australia, Australia; Sansom Institute for Health Research, School of Pharmacy and Medical Science, University of South Australia, Adelaide, South Australia, Australia; and Department of Psychology, The University of Pennsylvania, Philadelphia, Pennsylvania, USA
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107
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Montelius C, Szwiec K, Kardas M, Lozinska L, Erlanson-Albertsson C, Pierzynowski S, Rehfeld JF, Weström B. Dietary thylakoids suppress blood glucose and modulate appetite-regulating hormones in pigs exposed to oral glucose tolerance test. Clin Nutr 2014; 33:1122-6. [DOI: 10.1016/j.clnu.2013.12.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 12/20/2013] [Accepted: 12/20/2013] [Indexed: 10/25/2022]
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108
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Variations in the neonatal environment modulate adult behavioral and brain responses to palatable food withdrawal in adult female rats. Int J Dev Neurosci 2014; 40:70-5. [DOI: 10.1016/j.ijdevneu.2014.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 11/11/2014] [Accepted: 11/11/2014] [Indexed: 12/21/2022] Open
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Rossetti C, Halfon O, Boutrel B. Controversies about a common etiology for eating and mood disorders. Front Psychol 2014; 5:1205. [PMID: 25386150 PMCID: PMC4209809 DOI: 10.3389/fpsyg.2014.01205] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 10/06/2014] [Indexed: 12/25/2022] Open
Abstract
Obesity and depression represent a growing health concern worldwide. For many years, basic science and medicine have considered obesity as a metabolic illness, while depression was classified a psychiatric disorder. Despite accumulating evidence suggesting that obesity and depression may share commonalities, the causal link between eating and mood disorders remains to be fully understood. This etiology is highly complex, consisting of multiple environmental and genetic risk factors that interact with each other. In this review, we sought to summarize the preclinical and clinical evidence supporting a common etiology for eating and mood disorders, with a particular emphasis on signaling pathways involved in the maintenance of energy balance and mood stability, among which orexigenic and anorexigenic neuropeptides, metabolic factors, stress responsive hormones, cytokines, and neurotrophic factors.
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Affiliation(s)
- Clara Rossetti
- Center for Psychiatric Neuroscience, Lausanne University Hospital Lausanne, Switzerland
| | - Olivier Halfon
- Division of Child and Adolescent Psychiatry, Department of Psychiatry, Lausanne University Hospital Lausanne, Switzerland
| | - Benjamin Boutrel
- Center for Psychiatric Neuroscience, Lausanne University Hospital Lausanne, Switzerland ; Division of Child and Adolescent Psychiatry, Department of Psychiatry, Lausanne University Hospital Lausanne, Switzerland
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110
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Ferro Cavalcante TC, Marcelino da Silva AA, Lira MCA, Amaral Almeida LCD, Marques APJ, Nascimento ED. Early exposure of dams to a westernized diet has long-term consequences on food intake and physiometabolic homeostasis of the rat offspring. Int J Food Sci Nutr 2014; 65:989-93. [DOI: 10.3109/09637486.2014.950208] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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111
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Hoertel HA, Will MJ, Leidy HJ. A randomized crossover, pilot study examining the effects of a normal protein vs. high protein breakfast on food cravings and reward signals in overweight/obese "breakfast skipping", late-adolescent girls. Nutr J 2014; 13:80. [PMID: 25098557 PMCID: PMC4249715 DOI: 10.1186/1475-2891-13-80] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 07/29/2014] [Indexed: 11/13/2022] Open
Abstract
Background This pilot study examined whether the addition of a normal protein (NP) vs. high protein (HP) breakfast leads to alterations in food cravings and plasma homovanillic acid (HVA), which is an index of central dopamine production, in overweight/obese ‘breakfast skipping’ late-adolescent young women. Methods A randomized crossover design was incorporated in which 20 girls (age 19 ± 1 y; BMI 28.6 ± 0.7 kg/m2) consumed 350 kcal NP (13 g protein) breakfast meals, 350 kcal HP (35 g protein) breakfast meals, or continued breakfast skipping (BS) for 6 consecutive days/pattern. On day 7 of each pattern, a 4 h testing day was completed including the consumption of breakfast (or no breakfast) followed by food craving questionnaires and blood sampling for HVA concentrations throughout the morning. Results Both breakfast meals reduced post-meal cravings for sweet and savory foods and increased HVA concentrations vs. BS (all, p < 0.05). Between breakfast meals, the HP breakfast tended to elicit greater reductions in post-meal savory cravings vs. NP (p = 0.08) and tended to elicit sustained increases in HVA concentrations prior to lunch vs. NP (p = 0.09). Lastly, HVA concentrations were positively correlated with the protein content at breakfast (r: 0.340; p < 0.03). Conclusions Collectively, these findings suggest that the addition of breakfast reduces post-meal food cravings and increases homovanillic acid concentrations in overweight/obese young people with higher protein versions eliciting greater responses.
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Affiliation(s)
| | | | - Heather J Leidy
- Department of Nutrition & Exercise Physiology, School of Medicine, 207 Gwynn Hall, University of Missouri, Columbia, MO 65211, USA.
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112
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Bisogno T, Maccarrone M. Endocannabinoid signaling and its regulation by nutrients. Biofactors 2014; 40:373-80. [PMID: 24753395 DOI: 10.1002/biof.1167] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 04/08/2014] [Indexed: 01/07/2023]
Abstract
Diet plays a central role in maintaining health throughout life and a controlled food intake is associated to a reduced risk of certain diseases. A proper diet should include vitamins, minerals, carbohydrates, proteins, and fats that have to be optimally balanced in order to exert their physiological functions. The endogenous ligands of type-1 and type-2 cannabinoid receptors, N-arachidonoyl-ethanolamine and 2-arachidonoylglycerol, are arachidonic acid (AA) derivatives whose levels are regulated by the activity of metabolic enzymes, as well as by AA availability. Since the only sources of AA in mammals are diet and the enzymatic production in the liver from shorter-chain essential fatty acids like linoleic acid, it is realistic to hypothesize that endocannabinoid levels might be modulated by fatty acid composition of food. Therefore, in this review we summarize literature data indicating that endocannabinoid levels, and hence their activity at cannabinoid receptors, might be modulated by food composition. We focused our attention on dietary fatty acid content, and on type and esterified form of fatty acids in the different diets.
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Affiliation(s)
- Tiziana Bisogno
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, National Research Council, 80078, Pozzuoli, Italy; Center of Integrated Research, Campus Bio-Medico University of Rome, 00128, Rome, Italy
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113
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Montelius C, Erlandsson D, Vitija E, Stenblom EL, Egecioglu E, Erlanson-Albertsson C. Body weight loss, reduced urge for palatable food and increased release of GLP-1 through daily supplementation with green-plant membranes for three months in overweight women. Appetite 2014; 81:295-304. [PMID: 24993695 DOI: 10.1016/j.appet.2014.06.101] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/22/2014] [Accepted: 06/25/2014] [Indexed: 01/02/2023]
Abstract
The frequency of obesity has risen dramatically in recent years but only few effective and safe drugs are available. We investigated if green-plant membranes, previously shown to reduce subjective hunger and promote satiety signals, could affect body weight when given long-term. 38 women (40-65 years of age, body mass index 25-33 kg/m(2)) were randomized to dietary supplementation with either green-plant membranes (5 g) or placebo, consumed once daily before breakfast for 12 weeks. All individuals were instructed to follow a three-meal paradigm without any snacking between the meals and to increase their physical activity. Body weight change was analysed every third week as was blood glucose and various lipid parameters. On days 1 and 90, following intake of a standardized breakfast, glucose, insulin and glucagon-like peptide 1 (GLP-1) in plasma were measured, as well as subjective ratings of hunger, satiety and urge for different palatable foods, using visual analogue scales. Subjects receiving green-plant membranes lost significantly more body weight than did those on placebo (p < 0.01). Mean weight loss with green-plant extract was 5.0 ± 2.3 kg compared to 3.5 ± 2.3 kg in the control group. Consumption of green-plant membranes also reduced total and LDL-cholesterol (p < 0.01 and p < 0.05 respectively) compared to control. Single-meal tests performed on day 1 and day 90 demonstrated an increased postprandial release of GLP-1 and decreased urge for sweet and chocolate on both occasions in individuals supplemented with green-plant membranes compared to control. Waist circumference, body fat and leptin decreased in both groups over the course of the study, however there were no differences between the groups. In conclusion, addition of green-plant membranes as a dietary supplement once daily induces weight loss, improves obesity-related risk-factors, and reduces the urge for palatable food. The mechanism may reside in the observed increased release of GLP-1.
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Affiliation(s)
- Caroline Montelius
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Daniel Erlandsson
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Egzona Vitija
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Eva-Lena Stenblom
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Emil Egecioglu
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden
| | - Charlotte Erlanson-Albertsson
- Department of Experimental Medical Science, Appetite Regulation Unit, Faculty of Medicine, Lund University, Sölvegatan 19, 221 84 Lund, Sweden.
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114
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Ramli NS, Brown L, Ismail P, Rahmat A. Effects of red pitaya juice supplementation on cardiovascular and hepatic changes in high-carbohydrate, high-fat diet-induced metabolic syndrome rats. Altern Ther Health Med 2014; 14:189. [PMID: 24919841 PMCID: PMC4064814 DOI: 10.1186/1472-6882-14-189] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 06/06/2014] [Indexed: 11/17/2022]
Abstract
Background The fruit of Hylocereus polyrhizus, also known as red pitaya, and buah naga in Malay, is one of the tropical fruits of the cactus family, Cactaceae. Red pitaya has been shown to protect aorta from oxidative damage and improve lipid profiles in hypercholesterolemic rats probably due to phytochemicals content including phenolics and flavonoids. The aim of this study was to investigate the changes in cardiac stiffness, hepatic and renal function in high-carbohydrate, high-fat diet-induced obese rats following supplementation of red pitaya juice. Methods Total 48 male Wistar rats were divided into 4 groups: corn-starch group (CS), corn-starch + red pitaya juice group (CRP), high-carbohydrate, high fat group (HCHF) and high-carbohydrate, high fat + red pitaya juice (HRP). The intervention with 5% red pitaya juice was started for 8 weeks after 8 weeks initiation of the diet. Heart function was determined ex vivo with Langendorff hearts while plasma liver enzymes, uric acid and urea were measured using commercial kits. Total fat mass was determined with Dual-energy X-ray absorptiometry (DXA) scan. Glucose uptake was measured with Oral Glucose Tolerance Test (OGTT). Liver and cardiac structures were defined by histology. Results Supplementation of red pitaya juice for 8 weeks increased energy intake and abdominal circumference but no change in body fat and lean mass respectively. Also, there were a trend of uric acid and glucose normalization for HRP as compared to H-fed rats. Red pitaya juice treatment reduced ALP and ALT but caused significant increment in AST. Diastolic stiffness of the heart was reduced after supplementation of red pitaya juice in corn starch fed rats. However, the reduction was not significant in HRP rats in comparison with H rats. Conclusion The present study concluded that red pitaya juice may serve as a complimentary therapy for attenuating some signs of metabolic syndrome.
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115
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Swarna Nantha Y. Addiction to sugar and its link to health morbidity: a primer for newer primary care and public health initiatives in Malaysia. J Prim Care Community Health 2014; 5:263-70. [PMID: 24879656 DOI: 10.1177/2150131914536988] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVES The average consumption of sugar in the Malaysian population has reached an alarming rate, exceeding the benchmark recommended by experts. This article argues the need of a paradigm shift in the management of sugar consumption in the country through evidence derived from addiction research. METHODS "Food addiction" could lead to high levels of sugar consumption. This probable link could accelerate the development of diabetes and obesity in the community. A total of 94 reports and studies that describe the importance of addiction theory-based interventions were found through a search on PubMed, Google Scholar, and Academic Search Complete. RESULTS Research in the field of addiction medicine has revealed the addictive potential of high levels of sugar intake. Preexisting health promotion strategies could benefit from the integration of the concept of sugar addiction. A targeted intervention could yield more positive results in health outcomes within the country. CONCLUSION Current literature seems to support food environment changes, targeted health policies, and special consultation skills as cost-effective remedies to curb the rise of sugar-related health morbidities.
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116
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Temple JL. Factors that influence the reinforcing value of foods and beverages. Physiol Behav 2014; 136:97-103. [PMID: 24793218 DOI: 10.1016/j.physbeh.2014.04.037] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 04/22/2014] [Accepted: 04/23/2014] [Indexed: 11/28/2022]
Abstract
Behavioral economic principles state that as the cost of a product increases, purchasing or consumption of that product will decrease. To understand the impact of behavioral economics on ingestive behavior, our laboratory utilizes an operant behavior paradigm to measure how much work an individual will engage in to get access to foods and beverages. This task provides an objective measure of the reinforcing value. We have shown that consumption of the same high fat snack food every day for two weeks reduces its reinforcing value in lean individuals, but increases its reinforcing value in a subset of obese individuals. This increase in the reinforcing value of food predicts future weight gain. Similarly, we have shown that repeated intake of caffeinated soda increases its reinforcing value in boys, but not in girls. This increase in reinforcing value is not related to usual caffeine consumption, but may be associated with positive, subjective effects of caffeine that are more likely to be reported by boys than by girls. Because food and beverage reinforcement relates to real-world consumption, it is important to determine factors that increase or decrease the reinforcing value and determine the consequences of these responses. We are especially interested in determining ways to shift the behavioral economic curve in order to develop novel strategies to decrease the reinforcing value of less healthy snack foods and beverages, such as soda, potato chips and candy and to increase the reinforcing value of healthier foods and beverages, such as water, fruits, and vegetables.
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Affiliation(s)
- Jennifer L Temple
- Departments of Exercise and Nutrition Sciences and Community Health and Health Behavior, School of Public Health and Health Professions, University at Buffalo, 3435 Main Street, 1 Farber Hall, Buffalo, NY 14214, United States.
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Martire SI, Maniam J, South T, Holmes N, Westbrook RF, Morris MJ. Extended exposure to a palatable cafeteria diet alters gene expression in brain regions implicated in reward, and withdrawal from this diet alters gene expression in brain regions associated with stress. Behav Brain Res 2014; 265:132-41. [DOI: 10.1016/j.bbr.2014.02.027] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 01/17/2014] [Accepted: 02/18/2014] [Indexed: 01/16/2023]
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Gejl M, Rungby J, Brock B, Gjedde A. At the centennial of Michaelis and Menten, competing Michaelis-Menten steps explain effect of GLP-1 on blood-brain transfer and metabolism of glucose. Basic Clin Pharmacol Toxicol 2014; 115:162-71. [PMID: 24684709 DOI: 10.1111/bcpt.12240] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 03/17/2014] [Indexed: 12/16/2022]
Abstract
Glucagon-like peptide-1 (GLP-1) is a potent insulinotropic incretin hormone with both pancreatic and extrapancreatic effects. Studies of GLP-1 reveal significant effects in regions of brain tissue that regulate appetite and satiety. GLP-1 mimetics are used for the treatment of type 2 diabetes mellitus. GLP-1 interacts with peripheral functions in which the autonomic nervous system plays an important role, and emerging pre-clinical findings indicate a potential neuroprotective role of the peptide, for example in models of stroke and in neurodegenerative disorders. A century ago, Leonor Michaelis and Maud Menten described the steady-state enzyme kinetics that still apply to the multiple receptors, transporters and enzymes that define the biochemical reactions of the brain, including the glucose-dependent impact of GLP-1 on blood-brain glucose transfer and metabolism. This MiniReview examines the potential of GLP-1 as a molecule of interest for the understanding of brain energy metabolism and with reference to the impact on brain metabolism related to appetite and satiety regulation, stroke and neurodegenerative disorders. These effects can be understood only by reference to the original formulation of the Michaelis-Menten equation as applied to a chain of kinetically controlled steps. Indeed, the effects of GLP-1 receptor activation on blood-brain glucose transfer and brain metabolism of glucose depend on the glucose concentration and relative affinities of the steps both in vitro and in vivo, as in the pancreas.
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Affiliation(s)
- Michael Gejl
- Department of Biomedicine - Pharmacology, Aarhus University, Aarhus, Denmark; Centre for Advanced Imaging, The University of Queensland, Brisbane, Qld, Australia
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Japur CC, Diez-Garcia RW, de Oliveira Penaforte FR, de Sá MFS. Imbalance Between Postprandial Ghrelin and Insulin Responses to an Ad Libitum Meal in Obese Women With Polycystic Ovary Syndrome. Reprod Sci 2014; 21:1020-1026. [PMID: 24520086 DOI: 10.1177/1933719114522521] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Obese women with polycystic ovary syndrome (PCOS) may have impairment in the regulation of food intake associated with ghrelin and insulin. In order to compare postprandial ghrelin and insulin responses to an ad libitum meal, we assessed 30 obese women with PCOS and 23 obese women without PCOS (control group). Blood samples were taken under fasting conditions, preprandially, and 15, 45, 75, and 135 minutes after the beginning of an ad libitum meal and ghrelin and insulin concentrations were analyzed. Insulin resistance (IR) was classified using basal insulin, quantitative insulin sensitivity check index, and homeostasis model assessment index. Mean ad libitum food intake was similar between the groups (468 ± 150 vs 444 ± 165 g, P = .60). The IR was found in 56.6% in PCOS group compared with 30.4% in the control group (P < .01). The postprandial ghrelin response was similar in both the groups but the insulin area under the curve (AUC) tend to be greater in the PCOS group (12807 ± 8149.4 vs 8654.4 ± 7232.3 μIU/mL/min; P = .057). The ghrelin AUC was negatively correlated with the insulin AUC (r = -.5138; P = .01) only in the control group. The imbalance in the feedback mechanisms between insulin and ghrelin, present in obese women, especially those with IR, may affect food intake throughout the day and that could be a mechanism for the development of obesity in PCOS.
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Affiliation(s)
- Camila Cremonezi Japur
- Department of Gynecology and Obstetrics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil Laboratory of Eating Practices and Behavior (PratiCA), Course of Nutrition and Metabolism, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Rosa Wanda Diez-Garcia
- Laboratory of Eating Practices and Behavior (PratiCA), Course of Nutrition and Metabolism, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernanda Rodrigues de Oliveira Penaforte
- Laboratory of Eating Practices and Behavior (PratiCA), Course of Nutrition and Metabolism, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil Department of Nutrition, Institute of Health Sciences, Federal University of Triângulo Mineiro, Uberaba, Brazil
| | - Marcos Felipe Silva de Sá
- Department of Gynecology and Obstetrics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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Hochkogler CM, Rohm B, Hojdar K, Pignitter M, Widder S, Ley JP, Krammer GE, Somoza V. The capsaicin analog nonivamide decreases total energy intake from a standardized breakfast and enhances plasma serotonin levels in moderately overweight men after administered in an oral glucose tolerance test: A randomized, crossover trial. Mol Nutr Food Res 2014; 58:1282-90. [DOI: 10.1002/mnfr.201300821] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/21/2013] [Accepted: 12/24/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Christina M. Hochkogler
- Christian Doppler Laboratory for Bioactive Aroma Compounds; University of Vienna; Vienna Austria
| | - Barbara Rohm
- Christian Doppler Laboratory for Bioactive Aroma Compounds; University of Vienna; Vienna Austria
| | - Karin Hojdar
- Christian Doppler Laboratory for Bioactive Aroma Compounds; University of Vienna; Vienna Austria
| | - Marc Pignitter
- Department of Nutritional and Physiological Chemistry; University of Vienna; Vienna Austria
| | | | | | | | - Veronika Somoza
- Christian Doppler Laboratory for Bioactive Aroma Compounds; University of Vienna; Vienna Austria
- Department of Nutritional and Physiological Chemistry; University of Vienna; Vienna Austria
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Martin Agnoux A, Alexandre-Gouabau MC, Le Dréan G, Antignac JP, Parnet P. Relative contribution of foetal and post-natal nutritional periods on feeding regulation in adult rats. Acta Physiol (Oxf) 2014; 210:188-201. [PMID: 24010762 DOI: 10.1111/apha.12163] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 06/17/2013] [Accepted: 09/02/2013] [Indexed: 01/21/2023]
Abstract
AIM The aim of this study was to assess the contribution of both foetal and/or post-natal nutritional periods on feeding regulation in adult rats. METHODS Body weight gain, adipose tissue development, food preferences and feeding pattern under regular chow or Western diets were characterized on four experimental groups of rats: pups born from protein-restricted dams (R) and weaned by control (RC) or R dams (RR) and pups born from control dams weaned by C (CC) or R dams (CR). RESULTS Rats born with intrauterine growth restriction (IUGR) and fed a Western diet at adulthood appeared predisposed to body weight gain and more fat accretion, whereas CR rats, despite their preference for high-fat diet and their hyperphagia for Western diet, did not show significant increase in fat tissue. Daytime food intakes, as well as their speed of ingestion, were found modified in RC and RR. Alterations in the hypothalamic appetite regulatory mechanisms were investigated through neuropeptide expression analysis. IUGR rats showed altered expression of key elements of leptin and NPY signalling, while CR rats exhibited lesser expression of enterostatin, MC4r and HT-1Br mRNA. CONCLUSION Altogether, these results indicate that peri-natal nutrition has different lasting effects on feeding pattern and hypothalamic appetite regulation, depending on the time window insult.
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Affiliation(s)
- A. Martin Agnoux
- INRA, UMR1280, Physiologie des Adaptations Nutritionnelles; Nantes France
- Université de Nantes; UMR 1280, Physiologie des Adaptations Nutritionnelles; Nantes France
- IMAD, Institut des Maladies de l'Appareil Digestif, CRNH (Centre de Recherche en Nutrition Humaine); Nantes France
| | - M. -C. Alexandre-Gouabau
- INRA, UMR1280, Physiologie des Adaptations Nutritionnelles; Nantes France
- Université de Nantes; UMR 1280, Physiologie des Adaptations Nutritionnelles; Nantes France
- IMAD, Institut des Maladies de l'Appareil Digestif, CRNH (Centre de Recherche en Nutrition Humaine); Nantes France
| | - G. Le Dréan
- INRA, UMR1280, Physiologie des Adaptations Nutritionnelles; Nantes France
- Université de Nantes; UMR 1280, Physiologie des Adaptations Nutritionnelles; Nantes France
- IMAD, Institut des Maladies de l'Appareil Digestif, CRNH (Centre de Recherche en Nutrition Humaine); Nantes France
| | - J. -P. Antignac
- LUNAM université; Oniris, Laboratoire d'Etude des Résidus et Contaminants dans les Aliments (LABERCA); USC INRA 1329; Nantes France
| | - P. Parnet
- INRA, UMR1280, Physiologie des Adaptations Nutritionnelles; Nantes France
- Université de Nantes; UMR 1280, Physiologie des Adaptations Nutritionnelles; Nantes France
- IMAD, Institut des Maladies de l'Appareil Digestif, CRNH (Centre de Recherche en Nutrition Humaine); Nantes France
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Burgess E, Turan B, Lokken K, Morse A, Boggiano M. Profiling motives behind hedonic eating. Preliminary validation of the Palatable Eating Motives Scale. Appetite 2014; 72:66-72. [DOI: 10.1016/j.appet.2013.09.016] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 09/09/2013] [Accepted: 09/13/2013] [Indexed: 11/26/2022]
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Levy A, Salamon A, Tucci M, Limebeer CL, Parker LA, Leri F. Co-sensitivity to the incentive properties of palatable food and cocaine in rats; implications for co-morbid addictions. Addict Biol 2013; 18:763-73. [PMID: 22340075 DOI: 10.1111/j.1369-1600.2011.00433.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Several lines of evidence suggest that there may be a shared vulnerability to acquire behaviors motivated by strong incentive stimuli. Non-food restricted male Sprague-Dawley rats (n = 78) underwent place conditioning with Oreos, and were subsequently tested on cocaine self-administration (SA) on fixed and progressive ratios, as well as extinction and reinstatement by cocaine primes and by consumption of Oreos. Although there was a group preference for the Oreo-paired compartment, at the individual level some rats (69%) displayed a preference and others did not. In cocaine SA, 'preference' rats achieved higher break points on a progressive ratio, and displayed greater responding during extinction and cocaine-induced reinstatement. Within the context of this study, Oreo-cocaine cross-reinstatement was not observed. In a control study, rats (n = 29) conditioned with a less palatable food (rice cakes) also displayed individual differences in place preference, but not on subsequent cocaine tests. These findings indicate that there is a relationship between incentive learning promoted by palatable foods and by cocaine. This supports the hypothesis that co-morbid food-drug addictions may result from a shared vulnerability to acquire behaviors motivated by strong incentives.
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Affiliation(s)
- AnneMarie Levy
- Department of Psychology, University of Guelph, Ontario, Canada
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124
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Stenblom EL, Montelius C, Östbring K, Håkansson M, Nilsson S, Rehfeld JF, Erlanson-Albertsson C. Supplementation by thylakoids to a high carbohydrate meal decreases feelings of hunger, elevates CCK levels and prevents postprandial hypoglycaemia in overweight women. Appetite 2013; 68:118-23. [DOI: 10.1016/j.appet.2013.04.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 04/18/2013] [Accepted: 04/19/2013] [Indexed: 10/26/2022]
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125
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Effect of chronic administration of tamoxifen and/or estradiol on feeding behavior, palatable food and metabolic parameters in ovariectomized rats. Physiol Behav 2013; 119:17-24. [DOI: 10.1016/j.physbeh.2013.05.026] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 02/28/2013] [Accepted: 05/08/2013] [Indexed: 01/25/2023]
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126
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Ribeiro G, Santos O. Recompensa alimentar: mecanismos envolvidos e implicações para a obesidade. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.rpedm.2013.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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127
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Holik AK, Rohm B, Somoza MM, Somoza V. N(ε)-Carboxymethyllysine (CML), a Maillard reaction product, stimulates serotonin release and activates the receptor for advanced glycation end products (RAGE) in SH-SY5Y cells. Food Funct 2013; 4:1111-20. [PMID: 23759926 DOI: 10.1039/c3fo60097a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Maillard reaction products, which are formed in highly thermally treated foods, are commonly consumed in a Western diet. In this study, we investigated the impact of N(ε)-carboxymethyllysine (CML), a well-characterized product of the Maillard reaction, on the gene regulation of the human neuroblastoma cell line SH-SY5Y. Pathway analysis of data generated from customized DNA microarrays revealed 3 h incubation with 50 μM and 500 μM CML to affect serotonin receptor expression. Further experiments employing qRT-PCR showed an up-regulation of serotonin receptors 2A, 1A and 1B after 0.25 h and 3 h. In addition, 500 μM CML increased serotonin release, thus showing effects of CML not only at a genetic, but also at a functional level. Intracellular calcium mobilization, which mediates serotonin release, was increased by CML at concentrations of 0.05-500 μM. Since calcium mobilization has been linked to the activation of the receptor for advanced glycation end products (RAGE), we further investigated the effects of CML on RAGE expression. RAGE was found to be up-regulated after incubation with 500 μM CML for 0.25 h. Co-incubation with the calcium blocker neomycin for 0.25 h blocked the up-regulation of RAGE and the serotonin receptors 2A, 1A and 1B. These results indicate a possible link between a CML-induced calcium-mediated serotonin release and RAGE.
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Affiliation(s)
- Ann-Katrin Holik
- Department of Nutritional and Physiological Chemistry, University of Vienna, Althanstraße 14, Vienna, Austria
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128
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Ong ZY, Wanasuria AF, Lin MZ, Hiscock J, Muhlhausler BS. Chronic intake of a cafeteria diet and subsequent abstinence. Sex-specific effects on gene expression in the mesolimbic reward system. Appetite 2013; 65:189-99. [DOI: 10.1016/j.appet.2013.01.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 01/08/2013] [Accepted: 01/13/2013] [Indexed: 10/27/2022]
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da Silva AAM, Borba TKF, de Almeida Lira L, Cavalcante TCF, de Freitas MFL, Leandro CG, do Nascimento E, de Souza SL. Perinatal undernutrition stimulates seeking food reward. Int J Dev Neurosci 2013; 31:334-41. [PMID: 23669181 DOI: 10.1016/j.ijdevneu.2013.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 04/06/2013] [Accepted: 05/02/2013] [Indexed: 01/07/2023] Open
Abstract
Experiments in animals have revealed that perinatal nutritional restriction, which manifests in adulthood, increases food intake and preference for palatable foods. Considering this, we aimed to evaluate the effects of perinatal malnutrition on hedonic control of feeding behavior. In this study, we divided Wistar rats into two groups according to the diet provided to their mothers during pregnancy and lactation: the control group (diet with 17% casein) and low-protein group (diet with 8% casein). We assessed the animals' motivational behavior in adulthood by giving them a stimulus of food reward. We also assessed their neuronal activation triggered by the stimulus of palatable food using FOS protein labeling of neurons activated in the caudate putamen, paraventricular, dorsomedial, ventromedial, and lateral hypothalamic nuclei and amygdala. Evaluation of body weight in malnourished animals showed reduction from the 6th day of life until adulthood. Analysis of feeding behavior revealed that these animals were more motivated by food reward, but they had delays during learning of the task. This finding correlated with the number of c-FOS-immunoreactive neurons, which indicated that malnourished animals had an increase in the number of neurons activated in response to the palatable diet, especially in the amygdala and caudate putamen. The study therefore confirmed our hypothesis that early nutritional insults promote changes in encephalic control mechanisms, especially those related to food intake and search for reward.
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130
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Salamone JD, Correa M. Dopamine and food addiction: lexicon badly needed. Biol Psychiatry 2013; 73:e15-24. [PMID: 23177385 PMCID: PMC4450088 DOI: 10.1016/j.biopsych.2012.09.027] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 09/25/2012] [Accepted: 09/27/2012] [Indexed: 01/26/2023]
Abstract
Over the last few years, the concept of food addiction has become a common feature in the scientific literature, as well as the popular press. Nevertheless, the use of the term addiction to describe pathological aspects of food intake in humans remains controversial, and even among those who affirm the validity of the concept, there is considerable disagreement about its utility for explaining the increasing prevalence of obesity throughout much of the world. An examination of the literature on food addiction indicates that mesolimbic and nigrostriatal dopamine systems often are cited as mechanisms that contribute to the establishment of food addiction. However, in reviewing this literature, it is important to have a detailed consideration of the complex nature of dopaminergic involvement in motivational processes. For example, although it is often stated that mesolimbic dopamine mediates reward, there is no standard or consistent technical meaning of this term. Moreover, there is a persistent tendency to link dopamine transmission with pleasure or hedonia, as opposed to other aspects of motivation or learning. The present article provides a critical discussion of some aspects of the food addiction literature, viewed through the lens of recent findings and current theoretical views of dopaminergic involvement in food motivation. Furthermore, compulsive food intake and binge eating will be considered from an evolutionary perspective, in terms of the motivational subsystems that are involved in adaptive patterns of food consumption and seeking behaviors and a consideration of how these could be altered in pathological conditions.
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Affiliation(s)
- John D Salamone
- Department of Psychology, University of Connecticut, Storrs, Connecticut 06269-1020, USA.
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131
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Abstract
What do the Atkins Diet and the traditional Japanese diet have in common? The Atkins Diet is low in carbohydrate and usually high in fat; the Japanese diet is high in carbohydrate and usually low in fat. Yet both work to promote weight loss. One commonality of both diets is that they both eliminate the monosaccharide fructose. Sucrose (table sugar) and its synthetic sister high fructose corn syrup consist of 2 molecules, glucose and fructose. Glucose is the molecule that when polymerized forms starch, which has a high glycemic index, generates an insulin response, and is not particularly sweet. Fructose is found in fruit, does not generate an insulin response, and is very sweet. Fructose consumption has increased worldwide, paralleling the obesity and chronic metabolic disease pandemic. Sugar (i.e., fructose-containing mixtures) has been vilified by nutritionists for ages as a source of "empty calories," no different from any other empty calorie. However, fructose is unlike glucose. In the hypercaloric glycogen-replete state, intermediary metabolites from fructose metabolism overwhelm hepatic mitochondrial capacity, which promotes de novo lipogenesis and leads to hepatic insulin resistance, which drives chronic metabolic disease. Fructose also promotes reactive oxygen species formation, which leads to cellular dysfunction and aging, and promotes changes in the brain's reward system, which drives excessive consumption. Thus, fructose can exert detrimental health effects beyond its calories and in ways that mimic those of ethanol, its metabolic cousin. Indeed, the only distinction is that because fructose is not metabolized in the central nervous system, it does not exert the acute neuronal depression experienced by those imbibing ethanol. These metabolic and hedonic analogies argue that fructose should be thought of as "alcohol without the buzz."
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Affiliation(s)
- Robert H Lustig
- Department of Pediatrics and the Philip R. Lee Institute for Health Policy Studies, University of California, San Francisco, CA, USA.
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132
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Naughton SS, Mathai ML, Hryciw DH, McAinch AJ. Fatty Acid modulation of the endocannabinoid system and the effect on food intake and metabolism. Int J Endocrinol 2013; 2013:361895. [PMID: 23762050 PMCID: PMC3677644 DOI: 10.1155/2013/361895] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 04/25/2013] [Accepted: 05/07/2013] [Indexed: 01/26/2023] Open
Abstract
Endocannabinoids and their G-protein coupled receptors (GPCR) are a current research focus in the area of obesity due to the system's role in food intake and glucose and lipid metabolism. Importantly, overweight and obese individuals often have higher circulating levels of the arachidonic acid-derived endocannabinoids anandamide (AEA) and 2-arachidonoyl glycerol (2-AG) and an altered pattern of receptor expression. Consequently, this leads to an increase in orexigenic stimuli, changes in fatty acid synthesis, insulin sensitivity, and glucose utilisation, with preferential energy storage in adipose tissue. As endocannabinoids are products of dietary fats, modification of dietary intake may modulate their levels, with eicosapentaenoic and docosahexaenoic acid based endocannabinoids being able to displace arachidonic acid from cell membranes, reducing AEA and 2-AG production. Similarly, oleoyl ethanolamide, a product of oleic acid, induces satiety, decreases circulating fatty acid concentrations, increases the capacity for β -oxidation, and is capable of inhibiting the action of AEA and 2-AG in adipose tissue. Thus, understanding how dietary fats alter endocannabinoid system activity is a pertinent area of research due to public health messages promoting a shift towards plant-derived fats, which are rich sources of AEA and 2-AG precursor fatty acids, possibly encouraging excessive energy intake and weight gain.
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Affiliation(s)
- Shaan S. Naughton
- Biomedical and Lifestyle Diseases Unit, College of Health and Biomedicine, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
| | - Michael L. Mathai
- Biomedical and Lifestyle Diseases Unit, College of Health and Biomedicine, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
- Florey Neuroscience Institutes, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Deanne H. Hryciw
- Department of Physiology, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Andrew J. McAinch
- Biomedical and Lifestyle Diseases Unit, College of Health and Biomedicine, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
- *Andrew J. McAinch:
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133
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Parsons MP, Burt J, Cranford A, Alberto C, Zipperlen K, Hirasawa M. Nociceptin induces hypophagia in the perifornical and lateral hypothalamic area. PLoS One 2012; 7:e45350. [PMID: 23028954 PMCID: PMC3444493 DOI: 10.1371/journal.pone.0045350] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2012] [Accepted: 08/15/2012] [Indexed: 11/18/2022] Open
Abstract
Nociceptin/orphanin FQ (N/OFQ) is known to induce food intake when administered into the lateral ventricle or certain brain areas. This is somewhat contradictory to its reward-suppressing role, as food is a strong rewarding stimulus. This discrepancy may be due to the functional diversity of N/OFQ's target brain areas. N/OFQ has been shown to inhibit orexin and melanin-concentrating hormone (MCH) neurons, both of which are appetite-inducing cells. As the expression of these neurons is largely confined to the lateral hypothalamus/perifornical area (LH/PFA), we hypothesized that N/OFQ inhibits food intake by acting in this area. To test this hypothesis, we examined the effect of local N/OFQ infusion within the LH/PFA on food intake in the rat and found that N/OFQ decreased sugar pellet as well as chow intake. This effect was not seen when the injection site was outside of the LH/PFA, suggesting a site-specific effect. Next, to determine a possible cellular mechanism of N/OFQ action on food intake, whole cell patch clamp recordings were performed on rat orexin neurons. As previously reported in mice, N/OFQ induced a strong and long lasting hyperpolarization. Pharmacological study indicated that N/OFQ directly inhibited orexin neurons by activating ATP-sensitive potassium (KATP) channels. This effect was partially but significantly attenuated by the inhibitors of PI3K, PKC and PKA, suggesting that the N/OFQ signaling is mediated by these protein kinases. In summary, our results demonstrate a KATP channel-dependent N/OFQ signaling and that N/OFQ is a site-specific anorexic peptide.
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Affiliation(s)
- Matthew P. Parsons
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John’s, Newfoundland and Labrador, Canada
| | - Julia Burt
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John’s, Newfoundland and Labrador, Canada
| | - Amanda Cranford
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John’s, Newfoundland and Labrador, Canada
| | - Christian Alberto
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John’s, Newfoundland and Labrador, Canada
| | - Katrin Zipperlen
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John’s, Newfoundland and Labrador, Canada
| | - Michiru Hirasawa
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John’s, Newfoundland and Labrador, Canada
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Kurbanov DB, Currie PJ, Simonson DC, Borsook D, Elman I. Effects of naltrexone on food intake and body weight gain in olanzapine-treated rats. J Psychopharmacol 2012; 26:1244-51. [PMID: 22723540 DOI: 10.1177/0269881112450783] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Blockade of opioidergic neurotransmission contributes to reduction in body weight. However, how such blockade affects body weight gain (BWG) attributed to second generation antipsychotic agents (SGAs) has not yet been established. Here we examined the effects of an opioid receptor antagonist, naltrexone (NTX), on food intake and BWG associated with an SGA, olanzapine (OL). Four groups of Wistar Han IGS rats were treated for 28 days with either OL (2 mg/kg twice daily, intraperitoneal (IP)), a combination of OL (2 mg/kg twice daily, IP) + extended-release NTX (50 mg/kg, one-time, intramuscular (IM)), extended-release NTX (50 mg/kg, one-time, IM) or vehicle and their food intake and body weight were measured daily for the first nine days and every other day thereafter. Food intake and BWG that were increased by OL were decreased by the added NTX while NTX alone had no significant effects on food intake or on BWG. Plasma leptin concentrations were significantly elevated in the three groups receiving pharmacological agents, but did not differ among each other, suggesting that changes in leptin secretion and/or clearance alone would not explain the food intake and the body weight findings. Our results extend prior reports on anorexigenic effects of opioid antagonists by demonstrating that such effects may generalize to food intake increases and BWG arising in the context of OL pharmacotherapy.
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135
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Abstract
Recent research findings reveal that human bioenergetics belongs to the class of multi-loop nonlinear feedback systems—the same class of systems that system dynamics aims to study. In this paper the author aims to demonstrate the utility of utilizing simple—bathtub like—system dynamics models to gain insight into human weight and energy regulation and (in the process) help debunk widespread misconceptions that are hindering prevention and treatment efforts. Specifically, the author presents a series of models, starting with one that captures conventional wisdom about human energy regulation. This baseline model is critiqued and its limitations—and pitfalls—exposed through model experimentation. The model is then incrementally refined in a spiral of modeling-experimentation-learning steps, to arrive at a structure that integrates emerging (advanced) conceptualization(s) of human weight/energy regulation. In the concluding section, the author builds upon the insights gained from this modeling exercise to propose recommendations for obesity treatment and prevention.
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136
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Melanin-concentrating hormone receptor 1 (MCH1-R) antagonism: reduced appetite for calories and suppression of addictive-like behaviors. Pharmacol Biochem Behav 2012; 102:400-6. [PMID: 22705492 DOI: 10.1016/j.pbb.2012.06.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Revised: 05/29/2012] [Accepted: 06/09/2012] [Indexed: 11/23/2022]
Abstract
RATIONALE The hypothalamic neuropeptide melanin-concentrating hormone and its MCH1 receptor have been implicated in regulation of feeding and energy homeostasis, as well as modulation of reward-related behaviors. Here, we examined whether the MCH system plays a role both in caloric and motivational aspects of sugar intake. MATERIALS AND METHODS The non-peptide MCH1-R antagonist GW803430 (3, 10, 30 mg/kg, i.p.) was first tested on self-administration under a fixed ratio schedule of reinforcement of both a caloric (10% w/v sucrose) and a non-caloric (0.06% w/v saccharin) sweet solution. GW803430 was then tested for its ability to alter motivational properties and seeking of sucrose. Lastly, the drug was tested to concurrently examine its effects on the escalated consumption of both sugar and food in animals following intermittent sugar access. RESULTS The MCH1-R antagonist reduced sucrose- but not saccharin-reinforced lever pressing, likely reflecting a decreased appetite for calories in GW803430-treated rats. GW803430 reduced sucrose self-administration under a progressive ratio schedule, and suppressed cue-induced reinstatement of sucrose seeking, suggesting effects on rewarding properties of sucrose. GW803430 attenuated food intake in rats on intermittent access to sucrose at all doses examined (3, 10, 30 mg/kg), while reduction of sugar intake was weaker in magnitude. CONCLUSION Together, these observations support an involvement of the MCH system in regulation of energy balance as well as mediation of sucrose reward. MCH may be an important regulator of sugar intake by acting on both caloric and rewarding components.
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137
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Zhang LN, Morgan DG, Clapham JC, Speakman JR. Factors predicting nongenetic variability in body weight gain induced by a high-fat diet in inbred C57BL/6J mice. Obesity (Silver Spring) 2012; 20:1179-88. [PMID: 21720432 DOI: 10.1038/oby.2011.151] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Inbred C57BL/6J mice displayed large individual variations in weight gain when fed a high-fat diet (HFD). The objective of this study was to examine whether this predominantly nongenetic variability could be predicted by relevant baseline features and to explore whether variations in these significant features were influenced during pregnancy and/or lactation. Fat mass (FM), fat-free mass (FFM), food intake (FI), resting metabolic rate (RMR), physical activity (PA), and body temperature (T(b)) were all evaluated at baseline in 60 mice (aged 10-12 weeks) before HFD feeding. Regression analyses showed that baseline FM was a strong positive predictor of weight gain between 4 and 16 weeks of HFD. Baseline PA was negatively associated with weight gain at week 8, 12, and 16, and baseline FFM had a positive effect at week 12 and 16. In a second experiment, 40 female mice were mated and litter sizes (LS) were manipulated on day 3 of lactation. Weaning weight and postweaning growth rate (GR) had positive impacts on FM and FFM at age 9 weeks (FM, P = 0.001; FFM, P < 0.001: n = 97). Lactation LS had a negative effect on weaning weight and a positive effect on postweaning GR. In conclusion, our results show that obesity induced by HFD was associated with a higher baseline FM, a higher baseline FFM and a lower baseline PA level before the exposure of HFD. Two of these traits (FM and FFM) were influenced by lactation LS via weaning weight and postweaning GR.
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Affiliation(s)
- Li-Na Zhang
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK
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138
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Sclafani A. Gut-brain nutrient signaling. Appetition vs. satiation. Appetite 2012; 71:454-8. [PMID: 22664300 DOI: 10.1016/j.appet.2012.05.024] [Citation(s) in RCA: 142] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 05/12/2012] [Accepted: 05/17/2012] [Indexed: 01/09/2023]
Abstract
Multiple hormonal and neural signals are generated by ingested nutrients that limit meal size and suppress postmeal eating. However, the availability of sugar-rich and fat-rich foods can override these satiation/satiety signals and lead to overeating and obesity. The palatable flavor of these foods is one factor that promotes overeating, but sugar and fat also have postoral actions that can stimulate eating and increase food preferences. This is revealed in conditioning studies in which rodents consume flavored solutions paired with intragastric sugar or fat infusions. The significant flavor preferences and increased intake produced by the nutrient infusions appear to involve stimulatory gut-brain signals, referred to here as appetition signals, that are distinct from the satiation signals that suppress feeding. Newly developed rapid conditioning protocols may facilitate the study of postoral appetition processes.
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Affiliation(s)
- Anthony Sclafani
- Department of Psychology, Brooklyn College and the Graduate School, City University of New York, 2900 Bedford Avenue, Brooklyn, NY 11210, USA.
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139
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Protein v. carbohydrate intake differentially affects liking- and wanting-related brain signalling. Br J Nutr 2012; 109:376-81. [DOI: 10.1017/s0007114512001092] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Extreme macronutrient intakes possibly lead to different brain signalling. The aim of the present study was to determine the effects of ingesting high-protein v. high-carbohydrate food on liking and wanting task-related brain signalling (TRS) and subsequent macronutrient intake. A total of thirty female subjects (21·6 (sd 2·2) years, BMI 25·0 (sd 3·7) kg/m2) completed four functional MRI scans: two fasted and two satiated on two different days. During the scans, subjects rated all food items for liking and wanting, thereby choosing the subsequent meal. The results show that high-protein (PROT) v. high-carbohydrate (CARB) conditions were generated using protein or carbohydrate drinks at the first meal. Energy intake and hunger were recorded. PROT (protein: 53·7 (sd 2·1) percentage of energy (En%); carbohydrate: 6·4 (sd 1·3) En%) and CARB conditions (protein: 11·8 (sd 0·6) En%; carbohydrate: 70·0 (sd 2·4) En%) were achieved during the first meal, while the second meals were not different between the conditions. Hunger, energy intake, and behavioural liking and wanting ratings were decreased after the first meal (P< 0·001). Comparing the first with the second meal, the macronutrient content changed: carbohydrate − 26·9 En% in the CARB condition, protein − 37·8 En% in the PROT condition. After the first meal in the CARB condition, wanting TRS was increased in the hypothalamus. After the first meal in the PROT condition, liking TRS was decreased in the putamen (P< 0·05). The change in energy intake from the first to the second meal was inversely related to the change in liking TRS in the striatum and hypothalamus in the CARB condition and positively related in the PROT condition (P< 0·05). In conclusion, wanting and liking TRS were affected differentially with a change in carbohydrate or protein intake, underscoring subsequent energy intake and shift in macronutrient composition.
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140
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Perinatal overnutrition and the programming of food preferences: pathways and mechanisms. J Dev Orig Health Dis 2012; 3:299-308. [DOI: 10.1017/s204017441200030x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
One of the major contributing factors to the continuous rise in obesity rates is the increase in caloric intake, which is driven to a large extent by the ease of access and availability of palatable high-fat, high-sugar ‘junk foods’. It is also clear that some individuals are more likely to overindulge in these foods than others; however, the factors that determine an individual's susceptibility towards the overconsumption of palatable foods are not well understood. There is growing evidence that an increased preference for these foods may have its origins early in life. Recent work from our group and others has reported that in utero and early life exposure to these palatable foods in rodents increased the offspring's preference towards foods high in fat and sugar. One of the potential mechanisms underlying the programming of food preferences is the altered development of the mesolimbic reward system, a system that plays an important role in driving palatable food intake in adults. The aim of this review is to explore the current knowledge of the programming of food preferences, a relatively new and emerging area in the DOHAD field, with a particular focus on maternal overnutrition, the development of the mesolimbic reward system and the biological mechanisms which may account for the early origins of an increased preference for palatable foods.
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141
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Georg Jensen M, Knudsen J, Viereck N, Kristensen M, Astrup A. Functionality of alginate based supplements for application in human appetite regulation. Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.11.042] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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142
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Lemmens SG, Martens EA, Born JM, Martens MJ, Westerterp-Plantenga MS. Lack of effect of high-protein vs. high-carbohydrate meal intake on stress-related mood and eating behavior. Nutr J 2011; 10:136. [PMID: 22152216 PMCID: PMC3251533 DOI: 10.1186/1475-2891-10-136] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Accepted: 12/12/2011] [Indexed: 11/10/2022] Open
Abstract
Background Consumption of meals with different macronutrients, especially high in carbohydrates, may influence stress-related eating behavior. We aimed to investigate whether consumption of high-protein vs. high-carbohydrate meals influences stress-related mood, food reward, i.e. 'liking' and 'wanting', and post-meal energy intake. Methods Participants (n = 38, 19m/19f, age = 25 ± 9 y, BMI = 25.0 ± 3.3 kg/m2) came to the university four times, fasted, once for a stress session receiving a high-protein meal, once for a rest session receiving a high-protein meal, once for a stress session receiving a high-carbohydrate meal and once for a rest session receiving a high-carbohydrate meal (randomized cross-over design). The high-protein and high-carbohydrate test meals (energy percentage protein/carbohydrate/fat 65/5/30 vs. 6/64/30) matched for energy density (4 kJ/g) and daily energy requirements (30%). Stress was induced using an ego-threatening test. Pre- and post-meal 'liking' and 'wanting' (for bread, filling, drinks, dessert, snacks, stationery (non-food alternative as control)) was measured by means of a computer test. Following the post-meal 'wanting' measurement, participants received and consumed their wanted food items (post-meal energy intake). Appetite profile (visual analogue scales), mood state (Profile Of Mood State and State Trait Anxiety Inventory questionnaires), and post-meal energy intake were measured. Results Participants showed increased feelings of depression and anxiety during stress (P < 0.01). Consumption of the test meal decreased hunger, increased satiety, decreased 'liking' of bread and filling, and increased 'liking' of placebo and drinks (P < 0.0001). Food 'wanting' decreased pre- to post-meal (P < 0.0001). The high-protein vs. high-carbohydrate test meal induced lower subsequent 'wanting' and energy intake (1.7 ± 0.3 MJ vs. 2.5 ± 0.4 MJ) only in individuals characterized by disinhibited eating behavior (factor 2 Three Factor Eating Questionnaire, n = 16), during rest (P ≤ 0.01). This reduction in 'wanting' and energy intake following the high-protein meal disappeared during stress. Conclusions Consumption of a high-protein vs. high-carbohydrate meal appears to have limited impact on stress-related eating behavior. Only participants with high disinhibition showed decreased subsequent 'wanting' and energy intake during rest; this effect disappeared under stress. Acute stress overruled effects of consumption of high-protein foods. Trial registration The study was registered in the Dutch Trial Register (NTR1904). The protocol described here in this study deviates from the trial protocol approved by the Medical Ethical Committee of the Maastricht University as it comprises only a part of the approved trial protocol.
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Affiliation(s)
- Sofie G Lemmens
- Top Institute Food and Nutrition, Wageningen, The Netherlands.
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143
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Wiebe N, Padwal R, Field C, Marks S, Jacobs R, Tonelli M. A systematic review on the effect of sweeteners on glycemic response and clinically relevant outcomes. BMC Med 2011; 9:123. [PMID: 22093544 PMCID: PMC3286380 DOI: 10.1186/1741-7015-9-123] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 11/17/2011] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The major metabolic complications of obesity and type 2 diabetes may be prevented and managed with dietary modification. The use of sweeteners that provide little or no calories may help to achieve this objective. METHODS We did a systematic review and network meta-analysis of the comparative effectiveness of sweetener additives using Bayesian techniques. MEDLINE, EMBASE, CENTRAL and CAB Global were searched to January 2011. Randomized trials comparing sweeteners in obese, diabetic, and healthy populations were selected. Outcomes of interest included weight change, energy intake, lipids, glycated hemoglobin, markers of insulin resistance and glycemic response. Evidence-based items potentially indicating risk of bias were assessed. RESULTS Of 3,666 citations, we identified 53 eligible randomized controlled trials with 1,126 participants. In diabetic participants, fructose reduced 2-hour blood glucose concentrations by 4.81 mmol/L (95% CI 3.29, 6.34) compared to glucose. Two-hour blood glucose concentration data comparing hypocaloric sweeteners to sucrose or high fructose corn syrup were inconclusive. Based on two ≤10-week trials, we found that non-caloric sweeteners reduced energy intake compared to the sucrose groups by approximately 250-500 kcal/day (95% CI 153, 806). One trial found that participants in the non-caloric sweetener group had a decrease in body mass index compared to an increase in body mass index in the sucrose group (-0.40 vs 0.50 kg/m2, and -1.00 vs 1.60 kg/m2, respectively). No randomized controlled trials showed that high fructose corn syrup or fructose increased levels of cholesterol relative to other sweeteners. CONCLUSIONS Considering the public health importance of obesity and its consequences; the clearly relevant role of diet in the pathogenesis and maintenance of obesity; and the billions of dollars spent on non-caloric sweeteners, little high-quality clinical research has been done. Studies are needed to determine the role of hypocaloric sweeteners in a wider population health strategy to prevent, reduce and manage obesity and its consequences.
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Affiliation(s)
- Natasha Wiebe
- Department of Medicine, 13-103 Clinical Sciences Building, University of Alberta, Edmonton, Alberta, T6G 2G3 Canada
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144
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Dynamic regulation of dopamine and serotonin responses to salient stimuli during chronic haloperidol treatment. Int J Neuropsychopharmacol 2011; 14:1327-39. [PMID: 21281560 DOI: 10.1017/s1461145711000010] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Antipsychotic drugs are the clinical standard for the treatment of schizophrenia. Although these drugs work initially, many compliant patients relapse due to treatment failure. The known biomarkers can not sufficiently explain antipsychotic treatment failure. We, therefore, enquired how the dynamic responses of the neurotransmitters, dopamine and serotonin, change in relation to treatment action and failure. Rats received either short-term (2-6 d) or long-term (12-14 d) treatment with haloperidol, which resembled human D2 receptor occupancy, using osmotic mini-pumps. Dopamine and serotonin basal levels and responses to novelty, appetitive food, and to an aversive tail pinch were measured in the prefrontal cortex, nucleus accumbens and caudate putamen using in-vivo microdialysis, and the behaviour was recorded. Subsequently, we used in-vivo voltammetry to measure dopamine overflow in the nucleus accumbens. Haloperidol decreased dopamine, but not serotonin baseline levels in a time-dependent way. Salient stimuli induced dopamine and serotonin responses. Short-term haloperidol treatment attenuated the mesolimbic dopamine responses to aversive stimulation, while the responses to appetitive stimulation were largely preserved. After long-term treatment, the initial response adaptations were reversed. Similar changes were also observed at the behavioural level. In-vivo voltammetry showed that nucleus accumbens dopamine adaptations and their reversal were mediated by changes in extracellular dopamine release. Chronic haloperidol treatment, which resembles human D2 receptor occupancy, modulates dopamine and behavioural responses to aversive and appetitive stimulation depending on the duration of treatment. Specific changes in dopamine response dynamics and their reversal may be a functional substrate of antipsychotic action and failure respectively.
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145
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Yuliana ND, Jahangir M, Korthout H, Choi YH, Kim HK, Verpoorte R. Comprehensive review on herbal medicine for energy intake suppression. Obes Rev 2011; 12:499-514. [PMID: 20659298 DOI: 10.1111/j.1467-789x.2010.00790.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The obesity drug development is present not a bright and successful story. So far, drugs reported to be effective, either from synthetic or natural sources, mostly stimulated controversy because of serious adverse effects, which ended with stopping clinical trials or even withdrawal from the market. However, obesity and its comorbidities have become rapidly a major problem in both developed and developing countries. This has encouraged pharmaceutical companies and academia to keep on struggling on developing novel effective but safe obesity drugs, and on characterizing novel obesity drug targets. From existing scientific work on obesity drug discovery and commercial slimming preparations, compounds originating from nature, especially from plants, seem to be the first choice. Traditional belief that herbal medicine is safer than synthetic ones is one of the classical arguments, although scientifically this is not always true (e.g. ban on Ephedra). But in general, it has been widely acknowledged that a plant compound, with its unique scaffolds and rich diversity is an unlimited source of novel lead compounds. This paper aims to summarize all works focused on screening plant materials by targeting important pathways related to energy intake regulation, either by in vivo or in vitro experiments.
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Affiliation(s)
- N D Yuliana
- Department of Pharmacognosy, Section of Metabolomics, Leiden University, Leiden, The Netherlands
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146
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Sampey BP, Vanhoose AM, Winfield HM, Freemerman AJ, Muehlbauer MJ, Fueger PT, Newgard CB, Makowski L. Cafeteria diet is a robust model of human metabolic syndrome with liver and adipose inflammation: comparison to high-fat diet. Obesity (Silver Spring) 2011; 19:1109-17. [PMID: 21331068 PMCID: PMC3130193 DOI: 10.1038/oby.2011.18] [Citation(s) in RCA: 414] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Accepted: 01/09/2011] [Indexed: 12/15/2022]
Abstract
Obesity has reached epidemic proportions worldwide and reports estimate that American children consume up to 25% of calories from snacks. Several animal models of obesity exist, but studies are lacking that compare high-fat diets (HFD) traditionally used in rodent models of diet-induced obesity (DIO) to diets consisting of food regularly consumed by humans, including high-salt, high-fat, low-fiber, energy dense foods such as cookies, chips, and processed meats. To investigate the obesogenic and inflammatory consequences of a cafeteria diet (CAF) compared to a lard-based 45% HFD in rodent models, male Wistar rats were fed HFD, CAF or chow control diets for 15 weeks. Body weight increased dramatically and remained significantly elevated in CAF-fed rats compared to all other diets. Glucose- and insulin-tolerance tests revealed that hyperinsulinemia, hyperglycemia, and glucose intolerance were exaggerated in the CAF-fed rats compared to controls and HFD-fed rats. It is well-established that macrophages infiltrate metabolic tissues at the onset of weight gain and directly contribute to inflammation, insulin resistance, and obesity. Although both high fat diets resulted in increased adiposity and hepatosteatosis, CAF-fed rats displayed remarkable inflammation in white fat, brown fat and liver compared to HFD and controls. In sum, the CAF provided a robust model of human metabolic syndrome compared to traditional lard-based HFD, creating a phenotype of exaggerated obesity with glucose intolerance and inflammation. This model provides a unique platform to study the biochemical, genomic and physiological mechanisms of obesity and obesity-related disease states that are pandemic in western civilization today.
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Affiliation(s)
- Brante P Sampey
- Department of Nutrition, Gillings School of Global Public Health, School of Medicine; University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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Reece AS. Hypothalamic opioid-melanocortin appetitive balance and addictive craving. Med Hypotheses 2011; 76:132-7. [PMID: 20926200 DOI: 10.1016/j.mehy.2010.09.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2010] [Revised: 08/17/2010] [Accepted: 09/06/2010] [Indexed: 10/19/2022]
Abstract
Whilst the parallels between drug and food craving are receiving increasing attention, the recently elucidated complex physiology of the hypothalamic appetite regulatory centres has been largely overlooked in the efforts to understand drug craving which is one of the most refractory and problematic aspects of drug and behavioural addictions. Important conceptual gains could be made by researchers from both appetite and addiction neuroscience if they were to have an improved understanding of each others' disciplines. It is well known in addiction medicine that the use of many substances is elevated in opiate dependency. There is voluminous evidence of very high rates of drug use in opiate agonist maintained patients, and the real possibility exists that opiate agonist therapy therefore increases drug craving. Conversely, opiate antagonist therapy with naloxone or naltrexone has been shown to reduce most chemical and behavioural addictions, and naltrexone is now being developed together with bupropion as the anti-obesity drug "Contrave". Hypothalamic melanocortins, particularly α-MSH, are known to constitute the main brake to consumptive behaviour of food. There is a well described antagonism between melanocortins and opioids at many loci including the hypothalamus. Administration of exogenous opiates is known to both suppress α-MSH and to stimulate hedonic food consumption. Opiate maintenance programs are associated with weight gain. As monoamines, opioids and cannabinoids are known to be involved in appetite regulation, and as endorphin opioids are known to be perturbed in other addictions, further exploration of the hypothalamic appetite regulatory centre would appear to be an obvious, albeit presently largely overlooked, locus in which to study drug and other craving mechanisms.
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Affiliation(s)
- Albert Stuart Reece
- University of Western Australia, Clinical Neurosciences, 39 Gladstone Rd., Highgate Hill, Brisbane, Queensland 4101, Australia.
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148
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Obesity as an addiction: Why do the obese eat more? Maturitas 2011; 68:342-5. [DOI: 10.1016/j.maturitas.2011.01.018] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Accepted: 01/28/2011] [Indexed: 01/11/2023]
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149
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Ari M, Ozturk OH, Bez Y, Oktar S, Erduran D. High plasma nesfatin-1 level in patients with major depressive disorder. Prog Neuropsychopharmacol Biol Psychiatry 2011; 35:497-500. [PMID: 21163317 DOI: 10.1016/j.pnpbp.2010.12.004] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 11/15/2010] [Accepted: 12/07/2010] [Indexed: 11/28/2022]
Abstract
AIM In the present study, our aim was to determine the changes in the plasma concentrations of a recently discovered peptide hormone nesfatin-1 in patients with major depressive disorder and then to make a comparison with the control group. METHOD Subjects in the patient group were randomly selected from Mustafa Kemal University, Medical School, Research and Training Hospital, Psychiatry Department, Outpatient Clinic and subjects in the control group were selected from healthy volunteers. Healthy control subjects were matched in terms of weight and body mass index. Hamilton Depression Rating Scale (HAM-D) was applied to both groups. ELISA method was used for measurement of plasma nesfatin-1 levels. RESULTS The average nesfatin-1 level was statistically higher in patients with major depressive disorder than in the control group (p<0.001). A positive correlation was observed between plasma nesfatin-1 levels and HAM-D scores both in the patient group (r=0.59, p<0.001) and in the control group (r=0.58, p<0.001). CONCLUSION Our findings suggest a possible relationship between major depressive disorder and high plasma nesfatin-1 level.
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Affiliation(s)
- Mustafa Ari
- Mustafa Kemal University Medical Faculty, Department of Psychiatry, Antakya, Turkey
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150
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Lamy E, Rawel H, Schweigert FJ, Capela e Silva F, Ferreira A, Costa AR, Antunes C, Almeida AM, Coelho AV, Sales-Baptista E. The effect of tannins on Mediterranean ruminant ingestive behavior: the role of the oral cavity. Molecules 2011; 16:2766-84. [PMID: 21441875 PMCID: PMC6260606 DOI: 10.3390/molecules16042766] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Revised: 03/10/2011] [Accepted: 03/22/2011] [Indexed: 11/28/2022] Open
Abstract
Sheep, cattle and goat are domestic ruminants of significant economic interest in the Mediterranean region. Although sharing the same pasture ranges, they ingest different plants and plant parts and, consequently different levels of tannins. This suggests an ability to detect and adapt ingestion according to animal physiological limits of tolerance for plant secondary metabolites. This review will detail the effects of dietary tannins on feeding behavior, and the role of the oral cavity in this process, with focus on such ruminant species. The role of salivary protein profile in tannin perception in the oral cavity, and as a defense mechanism, will be discussed.
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Affiliation(s)
- Elsa Lamy
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal
- Escola Superior de Hotelaria e Turismo do Estoril (ESHTE), Estoril, Portugal
- Author to whom correspondence should be addressed; E-Mail:
| | - Harshadrai Rawel
- Institute of Nutritional Science, University of Potsdam, Nuthetal (OT Bergholz-Rehbrücke), Germany; E-Mails: (H.R.); (F.J.S.)
| | - Florian J. Schweigert
- Institute of Nutritional Science, University of Potsdam, Nuthetal (OT Bergholz-Rehbrücke), Germany; E-Mails: (H.R.); (F.J.S.)
| | - Fernando Capela e Silva
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal
- Departamento de Biologia, Universidade de Évora, Évora, Portugal; E-Mail:
| | - Ana Ferreira
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal
| | - Ana Rodrigues Costa
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal
- Departamento de Química, Universidade de Évora, Évora, Portugal; E-Mail:
| | - Célia Antunes
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal
- Departamento de Química, Universidade de Évora, Évora, Portugal; E-Mail:
- Centro de Neurociências e Biologia Celular (CNBC), Universidade de Coimbra, Coimbra, Portugal; E-Mail:
| | - André Martinho Almeida
- Instituto de Investigação Científica Tropical (IICT) & CIISA – Centro Interdisciplinar de Investigação em Sanidade Animal. CVZ - Centro de Veterinária e Zootecnia, Faculdade de Medicina Veterinária, Lisboa, Portugal; E-Mail:
- Instituto de Tecnologia Química e Biológica/Universidade Nova de Lisboa (ITQB/UNL), Oeiras, Portugal; E-Mail:
| | - Ana Varela Coelho
- Departamento de Química, Universidade de Évora, Évora, Portugal; E-Mail:
- Instituto de Tecnologia Química e Biológica/Universidade Nova de Lisboa (ITQB/UNL), Oeiras, Portugal; E-Mail:
| | - Elvira Sales-Baptista
- Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Évora, Portugal
- Departamento de Zootecnia, Universidade de Évora, Évora, Portugal; E-Mail:
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