scholarly journals Leptin administration to overweight and obese subjects for 6 months increases free leptin concentrations but does not alter circulating hormones of the thyroid and IGF axes during weight loss induced by a mild hypocaloric diet

2011 ◽  
Vol 165 (2) ◽  
pp. 249-254 ◽  
Author(s):  
Greeshma K Shetty ◽  
Giuseppe Matarese ◽  
Faidon Magkos ◽  
Hyun-Seuk Moon ◽  
Xiaowen Liu ◽  
...  
Keyword(s):  
Weight Loss ◽  
Hypocaloric Diet ◽  
Short Term ◽  
Obese Adults ◽  
Neuroendocrine Function ◽  
Term Energy ◽  
Obese Subjects ◽  
Energy Deprivation ◽  
To Receive

ObjectiveShort-term energy deprivation reduces leptin concentrations and alters the levels of circulating hormones of the hypothalamic–pituitary–peripheral axis in lean subjects. Whether the reduction in leptin concentration during long-term weight loss in obese individuals is linked to the same neuroendocrine changes seen in lean, leptin-sensitive subjects remains to be fully clarified.MethodsIn this study, 24 overweight and obese adults (16 women and eight men; body mass index (BMI): 27.5–38.0 kg/m2) were prescribed a hypocaloric diet (−500 kcal/day) and were randomized to receive recombinant methionyl leptin (n=18, metreleptin, 10 mg/day self-injected s.c.) or placebo (n=6, same volume and time as metreleptin) for 6 months.ResultsMetreleptin administration did not affect weight loss beyond that induced by hypocaloric diet alone (P for interaction=0.341) but increased the serum concentrations of total leptin by six- to eight-fold (P<0.001) and led to the generation of anti-leptin antibodies. Despite free leptin concentration (P for interaction=0.041) increasing from 9±1 ng/ml at baseline to 43±15 and 36±12 ng/ml at 3 and 6 months, respectively, changes in circulating hormones of the thyroid and IGF axes at 3 and 6 months were not significantly different in the placebo- and metreleptin-treated groups.ConclusionsLeptin does not likely mediate changes in neuroendocrine function in response to weight loss induced by a mild hypocaloric diet in overweight and obese subjects.

scholarly journals Effects of short-term caloric restriction on circulating free IGF-I, acid-labile subunit, IGF-binding proteins (IGFBPs)-1–4, and IGFBPs-1–3 protease activity in obese subjects

2006 ◽  
Vol 155 (4) ◽  
pp. 575-581 ◽  
Author(s):  
Michael Højby Rasmussen ◽  
Anders Juul ◽  
Lise Lund Kjems ◽  
Jannik Hilsted
Keyword(s):  
Weight Loss ◽  
Protease Activity ◽  
Biologically Active ◽  
Hypocaloric Diet ◽  
Short Term ◽  
Igf I ◽  
Igf Binding ◽  
Acid Labile Subunit ◽  
Obese Subjects ◽  
Acid Labile

Objective: Decreased levels of GH and total IGF-I have been reported in obesity. It has been hypothesized that increased free (biologically active) IGF-I levels generated from IGF-binding protein (IGFBP) protease activity could be the mechanism for the low GH release in dieting obese subjects. However, no published data exist on free IGF-I levels, acid labile subunit (ALS), or IGFBP protease activity in relation to GH release during a hypocaloric diet. The main purpose of this study was to determine free IGF-I, ALS, IGFBPs-1–4, and IGFBPs-1–3 protease activity in relation to 24-h GH release before and after a short-term very low-calorie diet (VLCD). Design: Six obese subjects before weight loss, five after an average weight loss of 36.1 kg, and five age-and sex-matched lean controls underwent a 4-day VLCD. All subjects were studied on two occasions, once during normal basic diet and again during the last day of the VLCD (1.6 MJ). Methods: Free IGF-I was determined by a non-competitive immunoradiometric assay. Results: Free IGF-I levels decreased in concert with increased ALS and unchanged blunted GH release after a VLCD in the obese subjects. IGFBPs-1–3 proteolytic activity was found to be unchanged by hypocaloric diet in all groups. Conclusions: We conclude that free IGF-I decreases after a short-term hypocaloric diet in obese subjects with no concomitant change in 24-h GH release. Circulating free IGF-I per se cannot be the main mechanism of the attenuated GH release in dieting obese subjects.

scholarly journals Improvements in Long-Term Appetite-Regulating Hormones in Response to a Combined Lifestyle Intervention for Obesity

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. A489-A490
Author(s):  
Susanne Kuckuck
Keyword(s):  
Weight Loss ◽  
Lifestyle Intervention ◽  
Weight Regain ◽  
Initial Weight ◽  
Short Term ◽  
Initial Weight Loss ◽  
Hormone Levels ◽  
Adiposity Signals ◽  
Term Energy

Abstract Altered levels of hormonal appetite regulators have been observed in obesity (BMI ≥ 30.0 kg/m2), most prominently increases of insulin and leptin (indicating resistance) as well as decreases of adiponectin - all of which are long-term energy regulators and adiposity signals. Disrupted signaling of these hormones may have detrimental effects on metabolism, but may also promote weight gain. Weight loss is often accompanied by normalizations of long-term adiposity signals, but findings concerning short-term appetite regulators after weight loss vary across interventions (e.g. very low calorie diets vs. exercise). Moreover, it is debated whether such weight-loss-induced hormonal changes may reflect a disposition for weight regain. Here, we investigated changes of long- and short-term appetite signals in response to an intensive 75-week combined lifestyle intervention (CLI) comprising a normocaloric healthy diet, physical activity and psychotherapy to promote improved long-term weight management. For 39 patients, data on fasting serum levels of appetite-regulating hormones (leptin, insulin, adiponectin, GIP, PP, PYY, CCK, FGF21) were available. Hormone levels were correlated to BMI at baseline (T0) and compared across three time points: T0, T1 (after 10 weeks; initial weight loss) and T2 (after 75 weeks; weight loss maintenance). T0-T1 hormone changes were correlated to BMI changes between T1 and T2 to investigate whether hormonal alterations during initial weight loss are associated with weight regain. At T0, hormone levels were not associated with BMI. BMI decreased significantly from T0 (40.13 kg/m2 ± 5.7) to T1 (38.2 ± 5.4, p &lt; .001) which was maintained at T2 (38.2 kg/m2 ± 5.9, p &lt; .001). There were no significant changes in GIP, PP, PYY, CCK and FGF21. Leptin decreased from T0 (44.9 ng/nl ± 15.3) to T1 (33 ng/nl ± 14.8, p &lt; .001) and T2 (38.6 ng/nl ± 16.0, p &lt; .01), just like insulin which was significantly decreased at T1 (123 pmol/l ± 65, p &lt; .05) and T2 (128 pmol/l ± 64, p &lt; .05) compared to T0 (160 pmol/l ± 80). Adiponectin did not change between T0 (3.36 ug/ml ± 2.1) and T1 (3.2 ug/ml ± 2.1), but was increased at T2 (3.7 ug/ml ± 2.9, p &lt; .01) compared to T1. T0-T2 BMI decrease correlated positively with T0-T2 decreases in leptin (r = .667, p &lt; .001), insulin (rho = .535, p &lt; .001) and increases of adiponectin (r = .412, p &lt; .01), but no other hormone. T0-T1 hormone changes did not predict T1-T2 BMI changes. Thus, a 75-week CLI was associated with beneficial changes in the long-term energy regulators adiponectin, leptin and insulin, but no changes in short-term appetite-regulating hormones were observed despite significant weight loss. Initial changes in appetite-regulating hormones were not associated with subsequent weight regain. Overall, our data suggest that a CLI does not lead to adverse changes in appetite regulation, but rather long-term improvements such as e.g. increased leptin and insulin sensitivity.

scholarly journals Web-Based Digital Health Interventions for Weight Loss and Lifestyle Habit Changes in Overweight and Obese Adults: Systematic Review and Meta-Analysis (Preprint)

2017 ◽  
Author(s):  
Alline M Beleigoli ◽  
Andre Q Andrade ◽  
Alexandre G Cançado ◽  
Matheus NL Paulo ◽  
Maria De Fátima H Diniz ◽  
...  
Keyword(s):  
Weight Loss ◽  
Digital Health ◽  
Meta Analysis ◽  
Overweight And Obesity ◽  
Health Interventions ◽  
Short Term ◽  
Obese Adults ◽  
Web Based ◽  
Lifestyle Habit

BACKGROUND Obesity is a highly prevalent condition with important health implications. Face-to-face interventions to treat obesity demand a large number of human resources and time, generating a great burden to individuals and health system. In this context, the internet is an attractive tool for delivering weight loss programs due to anonymity, 24-hour-accessibility, scalability, and reachability associated with Web-based programs. OBJECTIVE We aimed to investigate the effectiveness of Web-based digital health interventions, excluding hybrid interventions and non-Web-based technologies such as text messaging, short message service, in comparison to nontechnology active or inactive (wait list) interventions on weight loss and lifestyle habit changes in individuals with overweight and obesity. METHODS We searched PubMed or Medline, SciELO, Lilacs, PsychNet, and Web of Science up to July 2018, as well as references of previous reviews for randomized trials that compared Web-based digital health interventions to offline interventions. Anthropometric changes such as weight, body mass index (BMI), waist, and body fat and lifestyle habit changes in adults with overweight and obesity were the outcomes of interest. Random effects meta-analysis and meta-regression were performed for mean differences (MDs) in weight. We rated the risk of bias for each study and the quality of evidence across studies using the Grades of Recommendation, Assessment, Development, and Evaluation approach. RESULTS Among the 4071 articles retrieved, 11 were included. Weight (MD −0.77 kg, 95% CI −2.16 to 0.62; 1497 participants; moderate certainty evidence) and BMI (MD −0.12 kg/m2; 95% CI −0.64 to 0.41; 1244 participants; moderate certainty evidence) changes were not different between Web-based and offline interventions. Compared to offline interventions, digital interventions led to a greater short-term (<6 months follow-up) weight loss (MD −2.13 kg, 95% CI −2.71 to −1.55; 393 participants; high certainty evidence), but not in the long-term (MD −0.17 kg, 95% CI −2.10 to 1.76; 1104 participants; moderate certainty evidence). Meta-analysis was not possible for lifestyle habit changes. High risk of attrition bias was identified in 5 studies. For weight and BMI outcomes, the certainty of evidence was moderate mainly due to high heterogeneity, which was mainly attributable to control group differences across studies (R2=79%). CONCLUSIONS Web-based digital interventions led to greater short-term but not long-term weight loss than offline interventions in overweight and obese adults. Heterogeneity was high across studies, and high attrition rates suggested that engagement is a major issue in Web-based interventions.

Short-term weight loss after hospitalization predicts long-term survival in patients with chronic heart failure

2006 ◽  
Vol 31 (03) ◽  
Author(s):  
M Lainscak ◽  
S von Haehling ◽  
A Sandek ◽  
I Keber ◽  
M Kerbev ◽  
...  
Keyword(s):  
Heart Failure ◽  
Weight Loss ◽  
Chronic Heart Failure ◽  
Short Term ◽  
Term Survival ◽  
Long Term Survival

Abstract P290: Short-term Weight Change and Long-term Mortality in the Trials of Hypertension Prevention

Circulation ◽  
2016 ◽  
Vol 133 (suppl_1) ◽  
Author(s):  
Nancy R Cook ◽  
Lawrence J Appel ◽  
Paul K Whelton
Keyword(s):  
Weight Loss ◽  
Weight Change ◽  
Phase 1 ◽  
Total Mortality ◽  
Weight Loss Intervention ◽  
Phase 2 ◽  
Short Term ◽  
Hypertension Prevention ◽  
Long Term Mortality

Introduction: Although weight loss has favorable effects on intermediate outcomes, such as blood pressure and insulin resistance, few studies have examined its effects on long-term outcomes including total mortality. Methods: In the Trials of Hypertension Prevention (TOHP) individuals aged 30-54 years with high normal BP were randomized to a weight loss intervention, to one of several other lifestyle or dietary supplement interventions, or to usual care. All participants from Phase 1 (1987-90) and Phase 2 (1990-5) were followed for mortality through 2013. The association of weight change during any of the interventions with long-term mortality up to 18-24 years after the trial periods was examined among 3828 participants who fell into a high baseline weight stratum, defined as body mass index at least 26 kg/m2 in men and 24 kg/m2 in women. Results and Conclusions: There were 1477 high-weight participants in Phase 1 and 2351 in Phase 2, of whom 21% and 50%, respectively, were assigned to a weight loss intervention. Overall, mean weight change during the trial period was -1.8 lbs (-0.8% of baseline body weight) over 1.5 years in Phase 1 and 1.6 lbs (0.8%) over 3-4 years in Phase 2. A total of 556 (15%) lost > 5%, 1,101 (29%) lost <=5%, 1,567 (41%) gained less than 5%, and 604 (16%) gained > 5% in body weight. Corresponding hazard ratios (HRs) for total mortality were 0.82 (95% confidence interval (CI)=0.57-1.18), 0.94 (95% CI=0.72-1.23), 1.00 (reference), and 1.29 (95% CI=0.92-1.80) (p-trend = 0.046). There was a direct linear relationship with percent change in weight during the trial period and later mortality (HR=1.14 per 5% change, 95% CI=1.02-1.28, p=0.019). This association persisted throughout the course of mortality follow-up (Figure). In these healthy individuals taking part in lifestyle and nutrition supplement trials , short-term weight change was directly associated with mortality about two decades later. These results are consistent with a long-term beneficial effect of presumed intentional weight loss on total mortality.

Design of Microgrid Energy Management System Based on LabVIEW

2014 ◽  
Vol 960-961 ◽  
pp. 1562-1566 ◽  
Author(s):  
Teng Yu Ge ◽  
Bu Han Zhang ◽  
Jun Li Wu ◽  
Bing Jie Jin ◽  
Shuang Zhao ◽  
...  
Keyword(s):  
Energy Management ◽  
Management System ◽  
Point Of View ◽  
System Structure ◽  
Energy Management System ◽  
Short Term ◽  
Optimization Management ◽  
Term Energy ◽  
Microgrid Energy Management

Microgrid can be applied in different locations, relative to traditional power technology. It can improve the reliability of users of electricity and power system operation. Distributed power in microgrid needs real-time and multi-objective optimization management. This paper discusses functions and structure of microgrid energy management system(MGEMS) when connected with the main grid. Problems in long-term and short-term energy management of microgrid are discussed. From the point of view of the software platform, the system structure of MGEMS software are proposed. On this basis, this paper discusses the way to construct modules of MGEMS and their functions.

Session 23: Maintaining Motivation

2016 ◽  
pp. 139-144
Author(s):  
Evan M. Forman ◽  
Meghan L. Butryn
Keyword(s):  
Weight Loss ◽  
Weight Control ◽  
Hard Work ◽  
Short Term ◽  
Self Monitoring ◽  
Healthy Behaviors ◽  
Weight Control Behaviors ◽  
Motivate Behavior ◽  
Do So

This chapter (Session 23) discusses how to maintain long-term motivation for weight control by focusing on the importance of values to motivate behavior, even if short-term reward of weight control behaviors is decreasing (e.g., weight loss is slowing, self-monitoring is becoming tiresome). Clients are encouraged to view the hard work of weight control as working toward their values and to use the skill of willingness to continue to engage in healthy behaviors, even when it is difficult uncomfortable to do so.

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