Healthy Non-obese Subjects Research Articles

Study on the association between different obesity metabolic phenotypes and carotid plaque

Objective: To investigate the relationship between different obesity metabolic phenotypes and the incidence of new carotid artery plaque. Methods: The present study is a retrospective cohort study, collecting individuals from the Health Management Center of the Second Affiliated Hospital of Dalian Medical University who had two or more cervical vascular color ultrasound examinations and met the inclusion criteria from 2014 to 2022, and collected their baseline clinical data. According to whether the subjects were obese and had metabolic syndrome, they were divided into metabolically healthy non-obese group, metabolically unhealthy non-obese group, metabolically healthy obese group, and metabolically unhealthy obese group. The first physical examination time of the subjects was taken as the starting point of follow-up, and cervical vascular color ultrasound was performed during the follow-up physical examination, with the outcome event being carotid artery plaque. Kaplan-Meier survival curve analysis was used to analyze the cumulative incidence of carotid artery plaques in the four groups and log-rank test was performed, and a multifactorial Cox proportional hazards model was used to analyze the relationship between different obesity metabolic phenotypes and the risk of carotid artery plaque incidence. Results: A total of 4 890 subjects were enrolled, aged (45.4±9.6) years, and 2 754 (56.3%) males. The follow-up time was 1.14(0.93, 2.20) years. Compared with the other 3 obesity metabolic phenotypes, the incidence of carotid plaques in the metabolically unhealthy obesity group was the highest (15.4% (286/1 861)). Kaplan-Meier survival curve analysis showed that the cumulative incidence of carotid plaques in metabolically unhealthy obese subjects was about 2.962 times that of metabolically healthy non-obese subjects (log-rank P<0.001). Multivariate Cox regression results showed that the risk of carotid plaque in metabolically unhealthy obese subjects was 1.650 times that of metabolically healthy non-obese subjects (95%CI: 1.203-2.264, P=0.002). Conclusion: Metabolically unhealthy obesity phenotype is an independent risk factor for carotid plaque.

Effects of hypertriglyceridemia with or without NEFA elevation on β-cell function and insulin clearance and sensitivity.

Hypertriglyceridemia is a risk factor for developing type 2 diabetes (T2D) and might contribute to its pathogenesis either directly or through elevation of non-esterified fatty acids (NEFAs). This study aimed at comparing the glucometabolic effects of acute hypertriglyceridemia alone or combined with NEFA elevation in non-diabetic subjects. Twenty-two healthy lean volunteers underwent two 5-h intravenous infusions of either saline or Intralipid, without (n=12) or with heparin (I+H; n=10) to activate the release of NEFAs. Oral glucose tolerance tests (OGTTs) were performed during the last 3h of infusion. Insulin sensitivity, insulin secretion rate (ISR), model-derived β-cell function, and insulin clearance were measured after 2h of lipid infusion and during the OGTTs. In fasting conditions, both lipid infusions increased plasma insulin and ISR and reduced insulin clearance, without affecting plasma glucose and insulin sensitivity. These effects on insulin and ISR were more pronounced for I+H than Intralipid alone. During the OGTT, the lipid infusions markedly impaired glucose tolerance, increased plasma insulin and ISR, and decreased insulin sensitivity and clearance, without significant group differences. Intralipid alone inhibited glucose-stimulated insulin secretion (i.e. β-cell glucose sensitivity) and increased β-cell potentiation, whereas I+H had neutral effects on these β-cell functions. In healthy non-obese subjects, mild acute hypertriglyceridemia directly reduces glucose tolerance, insulin sensitivity and clearance, and has selective and opposite effects on β-cell function that are neutralized by NEFAs. These findings provide new insight into plausible biological signals that generate and sustain insulin resistance and chronic hyperinsulinemia in the development of T2D.

Abstract 4427: Do changes in lipid metabolism link obesity to pancreatic cancer

Abstract The near equal incidence and mortality rates of pancreatic cancer, combined with projections that pancreatic cancer will become the second-most common cancer-related deaths by 2050, underscore the need to identify patients with early disease and interrupt this trajectory. Obesity, weight gain and waistline have been implicated in increasing the risk of pancreatic cancer. Although metabolomic analyses of pancreatic cancer patients have established correlations between phospholipids, lysophospholipids with treatment outcomes, the association between metabolites, obesity, and pancreatic cancer remains largely understudied. The objective of this pilot study was to determine differences in serum metabolites in obese and overweight pancreatic cancer patients compared with healthy non-obese subjects. Our long-term goal is to develop serum marker(s) that may be used to prevent advanced pancreatic cancer and thus improve outcomes for these patients. Serum was obtained from healthy subjects (n=11; BMI range from 18-25), overweight (n=9; 25-30) and obese (n=7; &amp;gt;30) pancreatic cancer patients from an IRB approved study. Males (n=12) and females (n=15) were represented in the study. Global metabolic profiles were determined using Ultrahigh performance liquid chromatography-tandem mass spectroscopy. Raw data was extracted, peaks were identified and processed at Metabolon using the Laboratory Information Management System. Comparison between overweight pancreatic cancer patients and healthy controls identified 403 biochemicals (111 upregulated and 292 downregulated; p &amp;lt;0.05) and 93 biochemicals (40 upregulated and 53 downregulated; 0.05&amp;lt;p&amp;lt;0.10). Comparison of the differences in biochemicals between obese pancreatic cancer patients and healthy controls showed changes in 293 biochemicals (71 upregulated and 222 downregulated; p &amp;lt;0.05) and 123 biochemical changes at 0.05&amp;lt;p&amp;lt;0.10 (42 increased and 81 decreased). 38 (p &amp;lt;0.05) and 47 (0.05&amp;lt;p&amp;lt;0.10) differential levels of biochemicals were identified when obese and overweight pancreatic cancer patients were compared. Random forest analysis showed that the 30 top ranking biochemicals were involved in lipid metabolism, amino acid metabolism, nucleotide metabolism, peptide, xenobiotics, and carbohydrate metabolism. These data suggest an association between changes in lipid metabolism may be another link between obesity and pancreatic cancer. This project was funded in part by VA-Merit Award (I01 BX003876). Citation Format: Rita Ghosh, Deepa Ajit, Jillian Woodworth, Danielle Fritze, Francisco G. Cigarroa, Glenn A. Halff, Addanki Pratap Kumar. Do changes in lipid metabolism link obesity to pancreatic cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 4427.

Plasma Adiponectin and Its Correlation with Carotid Intima-Media Thickness in Obesity and in Type 2 Diabetes and Nonalcoholic Fatty Liver Disease.

The study included 200 Egyptian subjects. They were divided into four equal groups: group 1: obese patients with NAFLD and T2DM (O+/NAFLD+/DM+), group 2: nonobese patients with NAFLD and T2DM (O-/NAFLD+/DM+), group 3: obese nondiabetic patients with NAFLD (O+/NAFLD+/DM-), and group 4: nonobese healthy control subjects. Plasma adiponectin was measured using ELISA (enzyme-linked immunosorbent assay) technique. Ultrasonography was used to diagnose NAFLD. CIMT was assessed using Doppler ultrasonography. Plasma adiponectin was significantly lower and CIMT was significantly higher in O+/NAFLD+/DM+, as compared with O-/NAFLD+/DM+, O+/NAFLD+/DM-, and control subjects (p < 0.001 for all). A significant negative correlation was found between adiponectin and CIMT in obese patients with NAFLD (p < 0.05), but not in patients with NAFLD and T2DM. The significant independent predictors of CIMT were diabetes duration, BMI (body mass index), albumin/creatinine ratio, and cholesterol. Plasma adiponectin is inversely correlated with CIMT in obese patients with NAFLD, but not in patients with NAFLD and T2DM. Hypoadiponectinemia could be a good indicator of cardiovascular risk in obese patients with NAFLD, with or without T2DM, but not in nonobese patients with NAFLD.

Fasting indices of glucose-insulin-metabolism across life span and prediction of glycemic deterioration in children with obesity from new diagnostic cut-offs.

Fasting indices of glucose-insulin-metabolism are an easy and affordable tool to assess insulin resistance. We aimed to establish reference ranges for fasting insulin indices that reflect age-dependent variation over the entire life span and subsequently test their clinical application regarding the prediction of glycemic deterioration in children. We calculated age- and puberty-dependent reference values for HOMA-IR, HOMA2-IR, HOMA-β, McAuley index, fasting insulin, and fasting glucose from 6994 observations of 5512 non-obese healthy subjects aged 5-80 years. Applying those references, we determined the prevalence of insulin resistance among 2538 subjects with obesity. Furthermore, we investigated the intraindividual stability and the predictive values for future dysglycemia of these fasting indices in 516 children and adolescents with obesity up to 19 years of follow-up. We validated the results in three independent cohorts. There was a strong age-dependent variation of all indices throughout the life span, including prolonged recovery of pubertal insulin resistance and a subsequent continuous increase throughout adulthood. Already from age 5 years onwards, >40% of children with obesity presented with elevated parameters of insulin resistance. Applying newly developed reference ranges, insulin resistance among children with obesity doubled the risk for future glycemic deterioration (HOMA-IR HR 1.88 (95% CI 1.1-3.21)), fasting insulin HR 1.89 (95% CI 1.11-3.23). In contrast, fasting glucose alone was not predictive for emerging dysglycemia in children with obesity (HR 1.03 (95% CI 0.62-1.71)). The new insulin-based thresholds were superior to fasting glucose and HbA1c in detecting children eventually manifesting with dysglycemia in prospective analyses. The variation of fasting glucose-insulin-metabolism across the life span necessitates age-specific reference ranges. The improved prediction of future glycemic deterioration by indices based on fasting insulin beyond simple glucose measures alone could help to stratify risk characteristics of children with obesity in order to guide patient-tailored prevention and intervention approaches. German Research Foundation (DFG)-through SFB 1052, project number 209933838, subproject C5; Federal Ministry of Education and Research, Germany; European Union-European Regional Development Fund; Free State of Saxony. The German Diabetes Association, the CarbHealth consortium (01EA1908B). EU-IMI2-Consortium SOPHIA (grant agreement No 875534), German Center for Diabetes Research (DZD), grant number 82DZD14E03.

Abstract 13592: Gender Related Divergences in Cardiac and Vascular Function With Age

Introduction: Heart failure with preserved ejection fraction (HFpEF) is a disease of advanced aging that disproportionately affects women. Diastolic function changes with age and it is unknown if gender-related differences in progression exist. Understanding ages at which parameters of vascular and diastolic function diverge may provide insight into the differential risk of HFpEF between genders. Methods: Sedentary but healthy non-obese subjects aged 20-90 (n=178, 58% female; avg age 56 ± 13 yrs) underwent measures of pulmonary capillary wedge pressure (PCWP; right heart catheterization), blood pressure and cardiac output (acetylene rebreathe). Diastolic function was assessed by Doppler echocardiogram. A generalized linear model was used to estimate effects of age for each measured hemodynamic parameter as a function of gender. Results: Across age, women had higher systolic blood pressure (SBP) (age*gender p=0.025, age p&lt;0.001) and total peripheral resistance (TPR) (age*gender p=0.053, age p&lt;0.001). Changes in TPR were apparent at age 26 while SBP diverged at age 55. (Figure) Women had slower early diastolic recoil (e’) (age*gender p&lt;0.001) starting at age 55. While E wave velocity was lower in women, age-related decline was similar to men. E/e’ was higher in women (age*gender p=0.007) and diverged at a young age (28). PCWP declined with age similarly in both men and women. Systolic velocity (s’) declined in early middle age (42) in women (age*gender p=0.007, age p=0.002). Conclusions: Women experience greater changes in cardiac and vascular function with age than men. The age at which these parameters diverge differs, with evidence for decline in vascular function and cardiac contractility occurring at young ages in women while changes in SBP and diastolic recoil occur after age 55. Understanding lifestyle and hormonal factors that influence these differences may help elucidate HFpEF risk factors that are modifiable and serve as a target for therapy.

Alternation of the gut microbiota in metabolically healthy obesity: An integrated multiomics analysis.

Although the gut microbiota may be involved in obesity onset and progression, the exact association of the gut microbiota in metabolically healthy obesity (MHO) remains largely unknown. An integrated paired-sample metagenomic analysis was conducted to investigate the gut microbial network and biomarkers of microbial species from the MHO and healthy non-obese subjects in the GMrepo database. Further explorations were performed in the MHO mice model using a multiomics analysis to detect changes in the composition and function of the intestinal microbiome and associated metabolites. In the human study, 314 matched metagenomic data were qualified for the final analysis. We identified seven significantly changed species possibly involved in MHO pathogenesis (MHO-enriched: Bacteroides vulgatus, Megamonas sp; MHO-depleted: Butyrivibrio crossotus, Faecalibacterium prausnitzii, Bacteroides cellulosilyticus; Eubacterium siraeum; Bacteroides massiliensis). In the murine study, we found 79 significantly-changed species which may have possible associations with the MHO phenotype. The depletion of Bacteroides cellulosilyticus was commonly recognized in the human and murine MHO phenotype. Consistent with the metagenomic data, liquid chromatography-mass spectrometry (LC/MS) revealed significantly changed gut metabolites, which may promote MHO pathogenesis by altering the amino acids and lipid metabolic pathways. In the microbe-metabolites interaction analysis, we identified certain fatty acids (Dodecanedioic acid, Arachidic Acid, Mevalonic acid, etc.) that were significantly correlated with the MHO-enriched or depleted species. This study provides insights into identifying specific microbes and metabolites that may involve in the development of obesity without metabolic disorders. Future modalities for MHO intervention may be further validated by targeting these bacteria and metabolites.

Serotonin transporter is negatively associated with body mass index after glucose loading in humans.

Serotonin transporter (SERT) is a presynaptically localized membrane protein that regulates the serotonin transmission via its reuptake of released serotonin. We hypothesized that glucose loading may change SERT availability from brainstem in humans. An intravenous bolus injection of 18F-FP-CIT was administered after the infusion of glucose or placebo (normal saline), and the emission data were acquired over 90 mins in 33 healthy nonobese subjects. For a volume-of-interest-based analysis, an atlas involving midbrain, and pons was applied. SERT availability, binding potential (BPND), were measured via the simplified reference tissue method with a reference of cerebellum. For a voxel-based analysis, statistical parametric mapping 12 was used with parametric BPND images. BPNDs from midbrain (p=0.8937), and pons (p=0.1115) were not different between glucose and placebo loading. Both of BPNDs from midbrain after glucose, and placebo loading were negatively correlated with body mass index (BMI). BMI showed a trend of negative correlation with glucose-loaded BPND from pons, whereas, placebo-loaded BPNDs from pons did not show any significant association with BMI. In conclusion, SERT availability was negatively correlated with BMI after glucose loading in humans. SERT might have a role in eating behavior through the action of insulin. Further studies are needed to elucidate the underlying mechanism of this phenomenon.

Effect of obesity on pulmonary function test: A comparative study

Background: Obesity is worldwide health problem, with increasing incidence and prevalence, high costs, and poor outcomes. Accumulation of adipose tissue mass is associated with respiratory abnormalities. There is a need to conduct pulmonary function tests (PFTs) among obese subjects and create awareness of the drawback of obesity as it is reversible lifestyle disorder. Aim and Objective: The aim of the study was to assess the PFT in obese adult males and females and compare the result with controls. Materials and Methods: PFTs of healthy non-obese subjects and obese but healthy subjects were compared and correlated in a tertiary medical college and hospital. Criteria for obesity were according to the WHO criteria of body mass index. The PFTs were carried out with a computerized spirometer (Med-Spiror).The data were collected, statistically analyzed, and valid conclusions were drawn. Results: There was a statistically significant decrease in the value of forced expiratory volume (FEV) 1 and FEV3. Peak expiratory flow rate in obese males and females whereas forced vital capacity and force expiratory flow 25–75% significantly decreased anly in obese male subjects. Conclusions: Obesity influences respiratory functions. The cause of this reduction of various pulmonary functions is due to the inability of the chest wall and thoracic cavity to expand which lead to a decrease in ventilatory volumes and total lung capacity.

Association of basal metabolic rate with respiratory function among middle-aged obese and nonobese subjects

Background: Obesity is proved to be a comorbid condition in various metabolic, cardiovascular, and pulmonary disorders. Only a few investigations analyzed the relationship between basal metabolic rate (BMR) and lung function in middle-aged obese individuals. Objectives: The aim of this study was to determine the relationship of BMR to that of pulmonary functions among middle-aged obese subjects. Materials and Methods: This cross-sectional study was undertaken in obese and nonobese healthy subjects (50 each) of age 35–55 years. Body mass index (BMI), body fat percentage (BF%), fat mass (FM), and fat-free mass (FFM) were estimated, and BMR was calculated using predicted equations. Spirometric measures such as forced expiratory volume in one second (FEV1), forced vital capacity (FVC), FEV1/FVC, and peak expiratory flow rate (PEFR) were measured. Maximum voluntary ventilation (MVV) and mean forced expiratory flow during the middle of FVC (FEF25%–75%) were determined. Descriptive statistics, t test (unpaired), and Pearson’s correlation test were used for the analysis of the variables. Values of P ≤ 0.05 were considered statistically significant. Results: Mean BMR among obese was significantly higher than nonobese. The pulmonary function parameters FVC, FEV1, and FEF25%–75% were significantly reduced in obese. A significant positive correlation of BMR was found with FVC, FEV1, PEFR, FEF25%–75%, and MVV among both obese and nonobese. An inverse correlation existed between BMR and FEV1-to-FVC ratio in the study participants. Conclusions: Pulmonary functions are more closely associated with fat distribution than with the extent of obesity. The study outcome suggests that, in the context of early lung function alterations in the middle-aged obese subjects, it is necessary to take into account the BMR and body composition instead of BMI alone.

1223-P: Effects of Bariatric Surgery on Quality of Life, Body Image, and Sex Life in Obese Women

Bariatric surgery and consequent weight loss improve metabolic and anthropometric parameters in obese subjects. However, a detailed assessments about the impact of bariatric surgery on quality of life (QoL), body image perception, and sex life is lacking. The aim of this study was to assess the QoL, body image satisfaction and sexual function in 389 female patients with obesity (age 40±10 years, pre-surgery weight 120.4±17.7 kg) before and at least 6 months after bariatric surgery (60% sleeve gastrectomy, 40% gastric bypass). All participants were asked to complete the following online self-report questionnaires seven days before and six months after bariatric surgery: the Body Uneasiness Test (BUT) to assess self-perception of body image, the Short Form-12 (SF-12) to QoL as per the physical (PCS) and mental (MCS) domains, and the Female Sexual Function Index (FSFI) to screen for sexual dysfunctions in women. After bariatric surgery, patients lost 44.5±16.5 kg (p&amp;lt;0.001), with an increase of the PCS (53.3±7.2 vs. 31.9±21.4, p&amp;lt;0.001) and MCS (50.5±8.8 vs. 39.6±12.5, p&amp;lt;0.001) scores, that fell within the normal range of healthy individuals. All patients showed a significant improvement of the global score index domain of the BUT (1.9±1.1 vs. 3.7±0.9, p&amp;lt;0.001). The youngest patients (18-39 years old) who lost at least 40% of the baseline weight obtained a normalization of their body image concern domain results, reaching the reference range for healthy non-obese subjects. After bariatric surgery, patients also had a significant improvement of the FSFI (26.8±9.7 vs. 19.6±8.8, p&amp;lt;0.001), with an increase of non-dysfunctional, sexually active women from 26.2% to 78.2%. Significant correlations were found between the extent of weight loss and the improvement of all the psychometric parameters. Bariatric surgery is an efficient and safe treatment for obesity, and the physical gains related to weight loss are also mirrored by significant improvements in mental and physical health and sexual function. Disclosure L. Di gioia: None. A. Natalicchio: Speaker’s Bureau; Self; AstraZeneca, Boehringer Ingelheim International GmbH, Lilly Diabetes, Sanofi. L. Laviola: Advisory Panel; Self; A. Menarini Diagnostics, Abbott, AstraZeneca, Lilly Diabetes, Novo Nordisk Inc., Roche Diabetes Care, Sanofi-Aventis, Speaker’s Bureau; Self; Boehringer Ingelheim International GmbH, Medtronic. A. Bertolino: None. F. Giorgino: Consultant; Self; AstraZeneca, Boehringer Ingelheim International GmbH, Lilly Diabetes, Novo Nordisk, Roche Diabetes Care, Sanofi, Research Support; Self; Lilly Diabetes, Roche Diabetes Care. S. Perrini: None. A. Braun: None. E. Rossi: None. F. Giordano: None. F. Guarini: None. E. Siciliano: None. A. Cignarelli: None. A. Leonardini: None.

The relation between increased carotid intima-media thickness with fibrin monomers in obese children.

This study aimed to investigate the association between carotid intima-media changes that play a part in the atherosclerotic process in childhood obesity and fibrin monomers as an important indicator of fibrin plaque. This is a cross-sectional study of obese children and non-obese healthy control subjects. Height, weight, body mass index, waist/hip ratio, systolic/diastolic blood pressures were recorded, in addition, biochemistry, haemogram, fibrin monomers and d-dimer were measured in both groups. Right and left common carotid intima-media thicknesses were measured by ultrasonography and mean carotid intima-media thickness was calculated. Obese children (n=89, 46.1% girls, median age: 12.6±2.3years) and healthy control group (n=40, 52.5% girls, median age: 13.2±2.2years) were comparable in terms of gender, age and puberty stage. Mean carotid intima-media thickness was higher in obese children than the healthy control group (P=.002). There was no difference between the two groups in terms of fibrin monomers and d-dimer levels. In obese children, there was a weak negative correlation between mean carotid intima-media thickness and fibrin monomers (P=.030, r=-0.233). In obese children, mean carotid intima-media thickness was determined higher, as an early indicator of atherosclerosis. We want to emphasise that obese children are at risk for cardiovascular disease and should be evaluated in terms of atherosclerosis. This study investigates the relation between increased carotid intima-media thickness and fibrin monomers, in children, the first time in Literature.

Controlled Attenuation Parameter in Healthy Individuals Aged 8-70 Years.

Abstract Purpose Controlled attenuation parameter (CAP) is a non-invasive method to assess the presence of liver steatosis. It has been evaluated in children and adults, mainly in either the obese or in subjects with suspected liver disease. Our aim was to describe CAP in healthy non-obese subjects without suspected liver steatosis and to suggest cutoff levels for steatosis. Materials and Methods We prospectively recruited 187 individuals aged 8–70 years. All underwent clinical examination, including height and weight measurement. Body mass index (BMI) was calculated and converted into z-scores. To exclude liver pathology, B-mode ultrasound and liver stiffness measurements were performed in all prior to CAP measurement. Blood was drawn for liver biochemistry in adults. Results CAP was associated with BMI z-score across all ages. CAP started to rise alongside BMI z-score already in subjects with a BMI below average. CAP values were higher in adults than in children (p&lt;0.001), and higher in adult males than adult females (p=0.014). CAP did not correlate with age within the adult or pediatric cohorts. CAP was highly correlated with the fatty liver index. 18 and 23% of subjects showed CAP above the suggested cutoff value for children and adults, respectively. Conclusion CAP was correlated with BMI z-score, even in individuals with a below-average BMI . We found CAP above published cutoff values in a substantial proportion of presumably healthy, non-obese children and adults, warranting further research to clarify whether this represents non-obese non-alcoholic fatty liver disease or if reference values need adjustment.

Relationship Between Serum Testosterone, Leptin,Interleukin-6 (il-6) Level and Insulin Sensitivity in Non-obese and Obese Male Subjects in Magway Region, Myanmar

Objective: To determine the relationship between insulin resistance and related variables (serum testosterone, interleukin (IL-6) and leptin level) in obese and non-obese healthy subjects. Methods: Community-based crosssectional, analytic study was undertaken in 60 subjects for each obese group (BMI ≥ 30.0 kg/m2) and non-obese group (BMI 18.5 to 24.9 kg/m2) (age;18-45 years) residing in Magway Township from December 2016 to December 2017. Serum insulin, testosterone, IL-6 and leptin levels were measured by enzyme linked immunoassay, and serum fasting glucose was measured by glucose oxidase method. Insulin sensitivity was calculated by HOMA formula (Homeostatic Model Assessment). Results:HOMA-IR, serum leptin and IL-6 level were significantly higher in obese group while serum testosterone level was significantly lower in obese group. There was a significantly correlation between HOMA-IR with leptin (r=0.306, p=0.001), IL-6 (r=0.237, p=0.009) and testosterone (r=-0.209,p=0.02). Moreover, serum leptin was significantly and positively correlated with IL-6 (r=0.391, p&lt;0.001) while serum testosterone was significantly and negatively correlated with leptin (r=-0.408, p&lt;0.001), and IL-6 (r=-0.34, p&lt;0.001).Conclusions:Obese men are more likely to have low testosterone, high inflammatory markers leptin and Il-6, which were associated with decreased insulin sensitivity.

Visceral Adiposity, Pro-Inflammatory Signaling and Vasculopathy in Metabolically Unhealthy Non-Obesity Phenotype.

The debate regarding the actual cardiovascular burden in metabolically healthy obese or metabolically unhealthy non-obesity individuals is ongoing. Accumulating data have suggested a unique pathophysiological role of pro-inflammatory cytokines in mediating metabolic and cardiovascular disorders by dysregulated visceral adiposity. To compare the burden of visceral adiposity, the inflammatory marker high-sensitivity C-reactive protein (hs-CRP) and the prevalent atherosclerotic burden in metabolically healthy obese (MHO) or metabolically unhealthy (MU) populations, were compared to those of metabolically healthy non-obesity subjects (MHNO). Coronary artery calcification score (CACS) and visceral fat, including pericardial fat (PCF)/thoracic peri-aortic fat (TAT), were quantified in 2846 asymptomatic subjects using a CT dataset. A cross-sectional analysis comparing CACS, inflammatory marker hs-CRP, and visceral fat burden among four obesity phenotypes (MHNO, metabolically unhealthy non-obesity (MUNO), MHO, and metabolically unhealthy obese (MUO)) was performed. Both MUNO and MUO demonstrated significantly higher hs-CRP and greater CACS than MHNO/MHO (adjusted coefficient: 25.46, 95% confidence interval (CI): 5.29–45.63; 43.55, 95% CI: 23.38–63.73 for MUNO and MUO (MHNO as reference); both p < 0.05). Visceral fat (PCF/TAT) was an independent determinant of MU and was similarly higher in the MUNO/MHO groups than in the MHNO group, with the MUO group having the largest amount. PCF/TAT, obesity, and MU remained significantly associated with higher CACS even after adjustment, with larger PCF/TAT modified effects for MU and diabetes in CACS (both pinteraction < 0.05). MU tightly linked to excessive visceral adiposity was a strong and independent risk factor for coronary atherosclerosis even in lean individuals, which could be partially explained by its coalignment with pathological pro-inflammatory signaling.

Microbiota Features Associated With a High-Fat/Low-Fiber Diet in Healthy Adults.

A high intake of dietary saturated fatty acids (SFAs) is related to an increased risk of obesity, inflammation and cancer-related diseases, and this risk is attenuated only when SFAs are replaced by unsaturated fats and unrefined carbohydrates. The gut microbiota has recently emerged as a new environmental factor in the pathophysiology of these disorders, and is also one of the factors most influenced by diet. We sought to determine whether the gut microbiota of healthy individuals whose intake of SFAs exceeds World Health Organization (WHO) recommendations exhibits features similar to those reported in people with obesity, inflammation, cancer or metabolic disease. Healthy non-obese subjects were divided into two groups based on their SFAs intake. Body composition and gut microbiota composition were analyzed, and associations between bacterial taxa, diet and body fat composition were determined globally and separately by sex. Metagenome functional pathways were predicted by PICRUSt analysis. Subjects whose SFAs intake exceeded WHO recommendations also had a dietary pattern of low fiber intake. This high saturated fat/low fiber diet was associated with a greater sequence abundance of the Anaerotruncus genus, a butyrate producer associated with obesity. Analysis of data of high SFAs intake by sex showed that females presented with a greater abundance of Campylobacter, Blautia, Flavonifractor and Erysipelatoclostridium, whereas males showed higher levels of Anaerotruncus, Eisenbergiella, a genus from the order Clostridiales (FamilyXIIIUCG_001) and two genera from the Lachnospiraceae family. PICRUSt analysis confirmed these data, showing a correlation with a decrease in the abundance of sequences encoding for transporters of some metals such as iron, which is needed to maintain a healthy metabolism. Thus, the microbiota of healthy people on a high SFAs diet contain bacterial taxa (Anaerotruncus, Lachnospiraceae Flavonifractor, Campylobacter, Erysipelotrichacea and Eisenbergiella) that could be related to the development of some diseases, especially obesity and other pro-inflammatory diseases in women. In summary, the present study identifies bacterial taxa that could be considered as early predictors for the onset of different diseases in healthy subjects. Also, sex differences in gut microbiota suggest that women and men differentially benefit from following a specific diet.

An Erythritol-Sweetened Beverage Induces Satiety and Suppresses Ghrelin Compared to Aspartame in Healthy Non-Obese Subjects: A Pilot Study.

Despite the reduced caloric content of artificially sweetened beverages (ASBs) relative to those sweetened with sucrose, consumption of ASBs fail to consistently decrease the risk of obesity and associated diseases. This failure may be due to the inability of ASBs to effectively reduce appetite and hence overall caloric intake. A variety of non-nutritive sweeteners (NNS), however, remain to be screened for effectiveness in promoting satiety and reducing calorie consumption. Erythritol is well-tolerated, low-calorie sugar alcohol widely used as a sugar substitute. It is unique among NNS due to its low sweetness index relative to glucose, meaning that it is typically served at much higher concentrations than other common NNS. Animal and human studies have noted correlations between osmolarity, satiety, and levels of satiety hormones, independent of the effects of sweetness or nutritive value. We hypothesized that consumption of a beverage sweetened with erythritol to the sweetness and osmolarity of a common soft drink will improve self-reported satiety and more strongly affect the magnitude of changes in the hormone ghrelin than would an iso sweet beverage sweetened only with aspartame, a sweetener with a high sweetness index relative to glucose. Using a randomized double-blind crossover trial, we found that serum ghrelin was significantly decreased after consumption of an erythritol-sweetened beverage compared to aspartame. Likewise, consumption of the erythritol-sweetened beverage increased various measures of satiety in volunteers. Knowledge gained from this project demonstrates that high-osmolarity NNS may be useful in formulating ASBs that are satiating and low in calories.

Cortical thickness of the tibial diaphysis reveals age- and sex-related characteristics between non-obese healthy young and elderly subjects depending on the tibial regions

PurposeThis study aimed to evaluate the age- and sex-related characteristics in cortical thickness of the tibial diaphysis between non-obese healthy young and elderly subjects as reference data.MethodsThe study investigated 31 young subjects (12 men and 19 women; mean age, 25 ± 8 years) and 54 elderly subjects (29 men and 25 women; mean age, 70 ± 6 years). Three-dimensional estimated cortical thickness of the tibial diaphysis was automatically calculated for 5000–9000 measurement points using the high-resolution cortical thickness measurement from clinical computed tomography data. In 12 assessment regions created by combining three heights (proximal, central, and distal diaphysis) and four areas of the axial plane at 90° (medial, anterior, lateral, and posterior areas) in the tibial coordinate system, the standardized thickness was assessed using the tibial length.ResultsAs structural characteristics, there were no differences in the medial and lateral thicknesses, while the anterior thickness was greater than the posterior thickness in all groups. The sex-related difference was not shown. As an age-related difference, elderly subjects showed greater or lesser cortical thickness than the young subjects, depending on the regions of the tibia.ConclusionsCortical thickness was different depending on sex, age, and regions in the tibia. The results of this study are of clinical relevance as reference points to clarify the causes of various pathological conditions for diseases.Level of evidenceLevel 3.

Evaluation of Serum Leptin, Interlukein–6 and some Biochemical Parameters in Iraq obese Adult Patients

Objective: The current study conducted for evaluating serum level of interleukin-6 and leptin (IL- 6) among Iraqi obese adult people and other biochemical parameters related with obesity. Methods: Leptin and IL-6 Levels were assessed in serum samples from 43 Iraqi obese adults and 30 non-obese healthy subjects. Results: Significant elevation (p<0.05) in S.Ca+ levels for obese females as compared to obese males and there is high decrease of significant (p<0.0001) in the S. Ca+ level for obese male as compared to control male. The liver function enzymes S. GOT S. GPT levels showed significant elevation (p<0.0001 and p<0.01) in obese female in comparison to their control and a significant elevation appeared at level of cholesterol for both (p<0.001 in male) and (p<0.01 in female), S LDL p<0.05 for obese male and HDL p<0.0001 in obese female. Finally, High positive correlation (p<0.01) between serum leptin levels for obese subjects and their BMI. Also, IL-6 revealed strong positive correlation (p<0.01) with S. TRIG and S. VLDL. Whereas, S.CREAT was positive association at level (p<0.05). Conclusions: The data revealed effect the obesity in different human body function, liver enzyme, lipid profile and leptin in adult’s male in different criteria according to the gender. As well as, the positive correlation between IL-6 with (S. CREAT, S. TRIG and VLDL) and leptin with BMI. Increased creatinine related with presence of inflammation or injury to the kidney, which was evidenced by the presence of a positive correlation with IL-6. Obesity effects on lipid profile and liver enzyme and leptin due to the sex hormone differences.

Perceptual Responses To Reduced Exertion High Intensity Interval Training (REHIT) In Adults Differing In Cardiorespiratory Fitness

Participation in physical activity (PA) in the US is low, as less than 50% of adults achieve at least 150 min/wk of moderate-intensity continuous training (MICT) or 75% of vigorous-intensity exercise (CDC, 2017). Low participation in PA is a problem because inactivity is one of the leading causes of premature mortality (Mokdad et al., 2004). The current recommendations including high volume MICT and resistance training require about 4 h/wk which is unrealistic for adults, as “lack of time” is cited as the primary reason for low PA (Trost et al., 2002). REHIT is a form of sprint interval training that requires only 10 minutes per session and elicits similar health related adaptations as chronic MICT (Cuddy et al., 2019). However, there are concerns that it may be too aversive (Ekkekakis et al., 2011). PURPOSE: To compare changes in affective valence and enjoyment to a single session of REHIT in adults with varying fitness level. METHODS: 85 healthy non-obese subjects participated in the study. Baseline testing consisted of incremental cycling to assess VO2max during which participants were familiarized with reporting Rating of Perceived Exertion (RPE) and affective valence. The VO2max results were used to group subjects into above and below average cardiorespiratory fitness (CRF). Subsequently, they completed a REHIT session consisting of two 20-second sprints interspersed with 3 minutes of active recovery. During the session, heart rate (HR), RPE, affective valence, blood lactate concentration (BLa), and enjoyment were assessed. RESULTS: RPE increased and was highest after sprint 2 (p < 0.001), but there was no significant group X time interaction (p = 0.41). Affective valence decreased but remained positive in both groups (p < 0.001), and there was no significant difference between groups (p = 0.86). Enjoyment was high in both groups (93.2 ± 20.8 vs. 91.1 ± 16.4 in above and below average CRF, respectively), and there was no significant difference between groups (p = 0.64). BLa increased 9-fold during REHIT (p = 0.001); however, there was no significant difference between groups (p = 0.64). CONCLUSION: There was no effect of CRF on perceptual changes in response to REHIT, indicating that low-volume SIT may be suitable for individuals with below average CRF.