scholarly journals Effects of Delayed Sample Processing on Determination of Total and High Molecular Weight (HMW) Adiponectin in Serum and Plasma: A Pilot Study

2016 ◽  
Vol 8 (3) ◽  
pp. 19
Author(s):  
Choaping Ng ◽  
Felicity J Rose ◽  
Sahar Keshvari ◽  
Marina M Reeves ◽  
Goce Dimeski ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Pilot Study ◽  
High Molecular Weight ◽  
Accurate Determination ◽  
Mean Difference ◽  
Serum Samples ◽  
Blood Samples ◽  
Hmw Adiponectin ◽  
Total Adiponectin

<p>Adiponectin is a beneficial adipocyte-secreted hormone, which circulates in a variety of multimeric forms termed low and high molecular weight (LMW/HMW). Effectiveness of clinical therapeutic trials which target adiponectin rely on accurate determination of circulating total and HMW adiponectin levels but the accuracy may be influenced by variations in sample handling processes. The aim of this pilot study was to investigate the effects of delayed processing of blood samples on the concentration of total and HMW adiponectin.</p><p>Materials and Methods: Fasting blood samples were collected for analysis of total and HMW adiponectin concentrations in EDTA plasma and serum from eight healthy participants.  Samples were centrifuged post 15 min storage at 4<sup>o</sup>C as the comparative ‘ideal’ method or after up to 72 h of refrigerated storage or 6 h at room temperature. Total and HMW adiponectin concentrations were measured by ELISA.</p><p>Results: Under ideal handling conditions measurements of total and HMW adiponectin concentrations were significantly higher in serum than in plasma (mean difference: -1.3 µg/mL [95% CI: -1.6, -1.0], p&lt;0.001; and, -0.6 µg/mL [95% CI: -0.7, -0.5], p&lt;0.001, respectively).  Storage of blood samples at 4<sup>o</sup>C for 72 h resulted in significant reductions in concentration of total adiponectin in serum (mean difference: -1.4 µg/mL [95% CI: -2.0, -0.8], p=0.001) and HMW adiponectin in plasma (mean difference: -0.6 µg/mL [95%CI: -0.9, -0.2], p=0.007), compared with ideal conditions.  Further analysis of serum samples showed a significant decrease in total adiponectin concentration after 6 h storage at 4<sup>o</sup>C (mean difference: -1.4 µg/mL [95% CI: -2.0, -0.8], p=0.001) compared with ideal conditions.</p><p>Conclusions: Delayed processing of samples may have differential effects on the concentration of total and HMW adiponectin in serum or plasma. Larger studies are warranted for clinical intervention trials.</p>

scholarly journals Linoleic Acid–Rich Oil Supplementation Increases Total and High-Molecular-Weight Adiponectin and Alters Plasma Oxylipins in Postmenopausal Women with Metabolic Syndrome

2020 ◽  
Vol 4 (9) ◽  
Author(s):  
Rachel M Cole ◽  
Sarah Puchala ◽  
Jia-Yu Ke ◽  
Mahmoud Abdel-Rasoul ◽  
Kristin Harlow ◽  
...  
Keyword(s):  
Metabolic Syndrome ◽  
Molecular Weight ◽  
Linoleic Acid ◽  
High Molecular Weight ◽  
Oil Consumption ◽  
Open Label ◽  
High Molecular Weight Adiponectin ◽  
Markers Of Inflammation ◽  
Hmw Adiponectin ◽  
Total Adiponectin

ABSTRACT Background The onset of menopause increases the risk of metabolic syndrome (MetS). Adiponectin is an adipokine associated with insulin sensitivity that is lower in people with MetS. Supplementing diets with linoleic acid (LA)-rich oil increased adiponectin concentrations and improved glucose control in women with type 2 diabetes. The effect of LA on adipokines, especially total and the bioactive form of adiponectin, high-molecular-weight (HMW) adiponectin, in women with MetS is unknown. Objectives The aim of this study was to explore the effect of supplementation of the diet with an oil rich in LA on adipokines in women with MetS. The effect of the LA-rich oil (LA-oil) on oxylipins, key metabolites that may influence inflammation and metabolism, was also explored. Methods In this open-label single-arm pilot study, 18 postmenopausal nondiabetic women with MetS enrolled in a 2-phase study were instructed to consume LA-rich vegetable oil (10 mL/d) as part of their habitual diets. Women consumed an oleic acid–rich oil (OA-oil) for 4 wk followed by an LA-oil for 16 wk. Fasting concentrations of adipokines, fatty acids, oxylipins, and markers of glycemia and inflammation were measured. Results After 4 wk of OA-oil consumption, fasting glucose and total adiponectin concentrations decreased whereas fasting C-reactive protein increased. After 16 wk of LA-oil supplementation total and HMW adiponectin and plasma oxylipins increased. Markers of inflammation and glycemia were unchanged after LA-oil consumption. Conclusions Supplementation with LA-oil increased total and HMW adiponectin concentrations and altered plasma oxylipin profiles. Larger studies are needed to elucidate the links between these changes and MetS. This trial was registered at clinicaltrials.gov as NCT02063165.

Measurement of high-molecular-weight adiponectin is not useful in assessing coronary stenosis

2012 ◽  
Vol 50 (4) ◽  
Author(s):  
Takuya Imatoh ◽  
Motonobu Miyazaki ◽  
Ken Kadowaki ◽  
Shinichi Tanihara ◽  
Chinami Akashi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Coronary Stenosis ◽  
Active Form ◽  
Surrogate Marker ◽  
Area Under The Curve ◽  
High Molecular Weight Adiponectin ◽  
Cross Sectional ◽  
Hmw Adiponectin ◽  
Total Adiponectin

AbstractIn many studies, high-molecular-weight (HMW) adiponectin has been considered the active form of adiponectin. However, whether HMW adiponectin is a good surrogate marker for coronary artery disease still needs to be elucidated.We conducted a hospital-based cross-sectional study to examine the relationship between total, HMW or non-HMW adiponectin concentrations and coronary stenosis in 83 male patients and 138 male controls.Patients with coronary stenosis had significantly lower total adiponectin concentrations compared with controls. Non-HMW adiponectin concentrations in cases were significantly lower than the controls. However, there were no significant differences between cases and controls in HMW adiponectin concentrations. From the receiver operating characteristic (ROC) analysis, the area under the curve (AUC) for total and non-HMW adiponectin was significantly larger than that for HMW adiponectin concentrations. Of the three models, that for non-HMW adiponectin showed the largest AUC (total adiponectin 0.74, HMW adiponectin 0.54, and non-HMW adiponectin 0.79).Despite associations between total adiponectin levels and coronary stenosis, our data go against any apparent association between HMW adiponectin concentrations and coronary stenosis.

scholarly journals Dietary factors associated with plasma high molecular weight and total adiponectin levels in apparently healthy women

2008 ◽  
Vol 159 (4) ◽  
pp. R5-R10 ◽  
Author(s):  
Mary Yannakoulia ◽  
Nikos Yiannakouris ◽  
Labros Melistas ◽  
Evaggelia Fappa ◽  
Nikoletta Vidra ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Statistical Significance ◽  
Dietary Factors ◽  
Dietary Intakes ◽  
Food Groups ◽  
Fruit Consumption ◽  
Hmw Adiponectin ◽  
Total Adiponectin ◽  
Apparently Healthy

ObjectiveOur aim was to investigate associations between dietary factors and high molecular weight (HMW) as well as total adiponectin in a sample of apparently healthy adult Mediterranean women.Design and methodsTwo hundred and twenty women were enrolled in this study. Anthropometric and body composition measurements were performed in all subjects. Fasting blood samples were taken; HMW and total adiponectin concentrations were measured. Food intake was evaluated using 3-day food records. The frequency of consumption of several food groups was approximately quantified in terms of number of servings per day. Furthermore, dietary intakes of betaine, choline, and free choline were estimated.ResultsWomen in the highest HMW adiponectin tertile had higher fruit intake compared with those with lower levels, after adjusting for potential confounders (P=0.04). On the contrary, dietary betaine and choline intakes were not different among HMW adiponectin tertiles. In linear models, fruit consumption, controlling for biological and lifestyle variables, was significantly related to HMW adiponectin (partial r=0.15, P=0.04), but the association with total adiponectin did not reach statistical significance (partial r=0.11, P=0.12). A significant negative correlation between total adiponectin and refined cereals was also observed (partial r=−0.16, P=0.03).DiscussionThis is the first study that evaluates associations between dietary factors and HMW adiponectin levels. The associations found are moderate and indicate that, after multivariate adjustment, fruit consumption is related to HMW adiponectin in both linear and nonlinear models.

scholarly journals Analytical Validation and Biological Evaluation of a High–Molecular-Weight Adiponectin ELISA

2007 ◽  
Vol 53 (12) ◽  
pp. 2144-2151 ◽  
Author(s):  
Madhur K Sinha ◽  
Traci Songer ◽  
Qiang Xiao ◽  
John H Sloan ◽  
Jin Wang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Bypass Surgery ◽  
Dynamic Range ◽  
Biological Evaluation ◽  
Size Exclusion ◽  
Proteinase K ◽  
Morbidly Obese ◽  
Hmw Adiponectin ◽  
Total Adiponectin

Abstract Background: Of the 3 circulating multimeric forms of adiponectin, the high–molecular-weight (HMW) form, as measured by size-exclusion and/or immunoblotting techniques, is a better index of insulin sensitivity for monitoring health and disease than is total adiponectin. We aimed to develop a simple ELISA to measure HMW adiponectin. Methods: We pretreated serum or plasma samples with digestion solution containing proteinase K (Millipore, ESDS). HMW (Millipore, EZHMWA-64K) and total adiponectin (Millipore, EZHADP-61K) concentrations were measured in treated and untreated samples, respectively, from 108 individuals and from 20 morbidly obese patients before and at 1, 3, 6, and 12 months after gastric-bypass surgery. Results: The ELISA has a dynamic range of 3–200 μg/L and a detection limit of 0.8 μg/L. Intraassay and interassay CVs were &lt;4% and &lt;10%, respectively. Sample-dilution curves paralleled the calibration curves. Fast protein liquid chromatography profiles of the proteinase K-treated samples revealed predominantly HMW adiponectin. Values for HMW adiponectin produced with this method are comparable with those obtained with Western blot analysis (y = 0.77x − 0.15; r = 0.96; n = 56). Body mass index (BMI)- and sex-related changes were more pronounced for HMW adiponectin and percentage of HMW adiponectin than for total adiponectin. HMW and total adiponectin increased after bypass surgery, but changes in HMW adiponectin were more pronounced and preceded changes in total adiponectin. Conclusion: This simple, rapid ELISA for HMW adiponectin recognizes the HMW isoform, produces results closely correlated with those obtained with Western blotting, and appears to better distinguish BMI-, sex-, and weight loss–associated differences than assays for total adiponectin.

scholarly journals Circulating high-molecular-weight adiponectin is upregulated in preeclampsia and is related to insulin sensitivity and renal function

2008 ◽  
Vol 158 (2) ◽  
pp. 197-201 ◽  
Author(s):  
Mathias Fasshauer ◽  
Theresa Waldeyer ◽  
Jeannette Seeger ◽  
Susanne Schrey ◽  
Thomas Ebert ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Renal Function ◽  
Insulin Sensitivity ◽  
High Molecular Weight ◽  
Active Form ◽  
Biologically Active ◽  
Serum Concentrations ◽  
High Molecular Weight Adiponectin ◽  
Hmw Adiponectin ◽  
Total Adiponectin

ObjectivePreeclampsia (PE) is a serious cardiovascular complication in pregnancy which is associated with an increased future metabolic and cardiovascular risk for mother and newborn. Recently, a paradoxical upregulation of the insulin-sensitizing and anti-atherogenic adipokine adiponectin has been shown in PE. Furthermore, high-molecular-weight (HMW) adiponectin has been suggested as the biologically active form of this adipokine.Design and methodsHMW adiponectin and total adiponectin serum concentrations were quantified by ELISA in PE (n=16) patients and pregnant control women without PE (n=20). Furthermore, HMW adiponectin and total adiponectin were correlated to clinical and biochemical measures of renal function, glucose, and lipid metabolism, as well as inflammation.ResultsMedian maternal HMW adiponectin and total adiponectin levels were significantly and independently upregulated almost twofold in PE when compared with controls. HMW adiponectin and total adiponectin correlated positively with creatinine and negatively with fasting insulin in univariate and multivariate analyses.ConclusionsWe show that maternal HMW adiponectin and total adiponectin serum concentrations are significantly increased in PE and are positively associated with markers of insulin sensitivity and renal dysfunction. Adiponectin might be part of a physiological feedback mechanism improving insulin sensitivity and cardiovascular health in PE.

scholarly journals Total and High Molecular Weight Adiponectin Levels and Prediction of Cardiovascular Risk in Diabetic Patients

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Dagmar Horáková ◽  
Kateřina Azeem ◽  
Radka Benešová ◽  
Dalibor Pastucha ◽  
Vladimír Horák ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Cardiovascular Risk ◽  
High Molecular Weight ◽  
Binary Logistic Regression ◽  
Binary Logistic Regression Analysis ◽  
Diabetic Patients ◽  
High Molecular Weight Adiponectin ◽  
Hmw Adiponectin ◽  
Total Adiponectin ◽  
Metabolically Healthy

The study aimed at assessing the potential use of lower total and HMW adiponectin levels for predicting cardiovascular risk in patients with type 2 diabetes mellitus (T2DM). Concentrations of total adiponectin or high molecular weight (HMW) adiponectin decrease in association with the development of metabolic dysfunction such as obesity, insulin resistance, or T2DM. Increased adiponectin levels are associated with a lower risk for coronary heart disease. A total of 551 individuals were assessed. The first group comprised metabolically healthy participants (143 females, and 126 males) and the second group were T2DM patients (164 females, and 118 males). Both total adiponectin and HMW adiponectin in diabetic patients were significantly lower when compared with the group of metabolically healthy individuals. There was a weak monotonic correlation between HMW adiponectin levels and triglycerides levels. Binary logistic regression analysis, gender adjusted, showed a higher cardiovascular risk in diabetic persons when both total adiponectin (OR = 1.700) and HMW adiponectin (OR = 2.785) levels were decreased. A decrease in total adiponectin levels as well as a decrease in its HMW adiponectin is associated with a higher cardiovascular risk in individuals with T2DM. This association suggests that adiponectin levels may be potentially used as an epidemiological marker for cardiovascular risk in diabetic patients.

Corrigendum to: Increased high molecular weight adiponectin, but decreased total adiponectin and kisspeptin, in central precocious puberty compared with aged-matched prepubertal girls

2017 ◽  
Vol 29 (12) ◽  
pp. 2506 ◽  
Author(s):  
Chantacha Sitticharoon ◽  
Maynart Sukharomana ◽  
Supawadee Likitmaskul ◽  
Malika Churintaraphan ◽  
Pailin Maikaew
Keyword(s):  
Blood Pressure ◽  
Molecular Weight ◽  
High Molecular Weight ◽  
Precocious Puberty ◽  
Tanner Stage ◽  
Central Precocious Puberty ◽  
Control Group ◽  
Hmw Adiponectin ◽  
Total Adiponectin ◽  
Prepubertal Girls

The aim of the present study was to compare serum leptin, kisspeptin, total adiponectin, high molecular weight (HMW) adiponectin and neuropeptide Y (NPY) levels between girls with central precocious puberty (CPP; n=26, 7–9.5 years old) and age-matched controls (n=29) including or excluding obese girls. Leptin and NPY levels were comparable between CPP and control girls. Kisspeptin levels were lower in the CPP than control group, and were positively correlated with oestrogen in the control group and with systolic and diastolic blood pressure in the CPP group. Kisspeptin levels were negatively correlated with FSH and LH in the CPP group. Total adiponectin levels were lower in CPP than control girls, and were negatively correlated with Tanner stage and body mass index, but positively correlated with the quantitative insulin sensitivity check index in the control group. HMW adiponectin was higher in the CPP than control group, and was positively correlated with Tanner stage and LH in all girls. Total adiponectin had a strong positive correlation with HMW adiponectin in the CPP group (r=0.915) compared with the control group (r=0.371). In conclusion, kisspeptin may be associated with increased oestrogen in prepubertal girls, but with increased blood pressure in girls with CPP. In girls entering puberty, HMW adiponectin was increased and associated with reproductive parameters. Based on these observations, HMW adiponectin probably plays an essential role in the initiation of puberty and is a candidate marker for the prediction of CPP.

scholarly journals Associations between Maternal and Fetal Levels of Total Adiponectin, High Molecular Weight Adiponectin, Selected Somatomedins, and Birth Weight of Infants of Smoking and Non-Smoking Mothers

2020 ◽  
Vol 17 (13) ◽  
pp. 4781 ◽  
Author(s):  
Magdalena Chełchowska ◽  
Joanna Gajewska ◽  
Tomasz M. Maciejewski ◽  
Joanna Mazur ◽  
Mariusz Ołtarzewski ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Birth Weight ◽  
Growth Factor ◽  
Cord Blood ◽  
High Molecular Weight ◽  
Umbilical Cord Blood ◽  
High Molecular Weight Adiponectin ◽  
Hmw Adiponectin ◽  
Total Adiponectin ◽  
Igf I

The aim of the study was to determine the relationships between maternal smoking, total adiponectin, high molecular weight adiponectin (HMW adiponectin), selected somatomedins, and the birth weight of newborns. A total of 78 women with a healthy, singleton pregnancy, 41 active smokers and 37 non-smokers, and their offspring were studied. Total and HMW adiponectin, insulin-like growth factor I (IGF-I), and insulin-like growth factor binding protein-1 (IGFBP-1) and 2 (IGFBP-2) were determined in maternal and cord blood by enzyme-link immunosorbent assay. Serum levels of total and HMW adiponectin were lower in smokers compared to the tobacco abstinent in both the mothers (p = 0.013; p = 0.006) and the infants (p = 0.001; p = 0.047). In smoking women and their children, serum concentrations of IGF-I were significantly lower (p = 0.014; p = 0.042), IGFBP-1 significantly higher (p = 0.009; p = 0.039), and IGFBP-2 did not differ from that observed in the non-smoking group. In multivariate analysis performed on the whole group of mothers, the highest impact of serum cotinine and IGFBP-2 levels were indicated for adiponectin and cotinine and the number of cigarettes/day for HMW adiponectin concentration. In correlation analysis estimated separately for smokers and non-smokers, neonatal birth weight was positively associated with total and HMW adiponectin concentrations in umbilical cord blood. Birth weight was also inversely associated with IGFBP-1 and positively correlated with IGF-I levels in maternal serum as well as in cord blood (r = −0.317, p = 0.005; r = −0.294, p = 0.004; r = 0.245, p = 0.031; r = 0.271, p = 0.009, respectively). The present study showed the levels of total and HMW adiponectin in umbilical cord blood may have a significant effect on fetal development. Both IGF-I and IGFBP-1 concentrations also play an essential role in fetal growth, which is an important predictor of birth weight. Cigarette smoking during pregnancy negatively affected adiponectin and the insulin growth factor profile in the serum of women and the cord blood and may be the reason for the lower birth weight of the smokers newborns compared with the nonsmokers offspring.

scholarly journals Total and high-molecular-weight adiponectin levels in relation to insulin resistance among overweight/obese adults

2013 ◽  
Vol 2 (2) ◽  
Author(s):  
Sushama D. Acharya ◽  
Rhobert W. Evans ◽  
Maria M. Brooks ◽  
Faina Linkov ◽  
Lora E. Burke
Keyword(s):  
Insulin Resistance ◽  
Molecular Weight ◽  
Weight Loss ◽  
High Molecular Weight ◽  
Adiponectin Level ◽  
Inverse Association ◽  
Obese Adults ◽  
Hmw Adiponectin ◽  
Total Adiponectin ◽  
Baseline Weight

Objective: To determine whether baseline levels or intervention-associated changes in total and high molecular weight (HMW) adiponectin levels were associated with insulin resistance after six months of behavioral treatment for weight loss.Design: An ancillary study to a behavioral weight loss trial; the intervention was delivered in group sessions.Methods: Participants included 143 overweight/obese adults with a mean BMI of 33.7 kg/m2. The sample was 88% female, 67% white, and 44.2 ± 8.5 years old. Circulating adiponectin levels (total and HMW) and the homeostasis model assessment (HOMA) of insulin resistance were measured and evaluated.Results: At baseline, there was significant inverse associations between total adiponectin and HOMA (p < 0.001) and between HMW adiponectin and HOMA (p < 0.001) independent of weight. At 6-mo, there was a 17% improvement in HOMA, 8% increase in total adiponectin, 17% increase in HMW adiponectin levels, and 8.72% weight loss (p's for all< 0.001). There was also a significant inverse association between changes in total adiponectin and HOMA (p = 0.04) that was independent of baseline weight and weight loss. In contrast, the association between changes in HMW adiponectin and HOMA was attenuated after adjustment for weight loss.Conclusions: An increased level of total adiponectin was associated with improved insulin sensitivity, regardless of baseline weight and weight loss. However, baseline total and HMW adiponectin levels were more strongly associated with HOMA than changes in these measures at six months. HMW adiponectin level was not related more closely to insulin resistance than total adiponectin level. 

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