جستجوی مقالات مرتبط با کلیدواژه « Adipokines » در نشریات گروه « پزشکی »

 Meteorin-like protein (METRNL) is a novel adipomyokine that may improve glucose tolerance, and its circulating levels are affected by changes in body weight.

 This study aimed to evaluate the effects of eight weeks of resistance training (RT) and high sucrose consumption on serum and adipose tissue METRNL levels in male rats.

 In this study, 32 Wistar male rats were divided into normal diet and high sucrose diet groups. After 4 weeks, each group was divided into control and training groups. The rats in the training group were subjected to the RT program (3 days/week, for 8 weeks). In addition to serum and adipose tissue levels of METRNL, we measured epididymal and mesenteric fat mass, serum glucose, insulin, and homeostatic model assessment of insulin resistance (HOMA-IR).

 High sucrose diet increased fat weights and serum levels of glucose, insulin, and IR index; nevertheless, it reduced the serum levels of METRNL. RT decreased serum insulin concentrations and HOMA-IR. The result of two-way ANOVA and the t-test showed that eight weeks of RT decreased serum levels of METRNL, insulin, and HOMA-IR in sugar solution-fed rats.

 The results suggest that RT may be an effective intervention to reduce serum METRNL and HOMA-IR levels, which is associated with improving body composition.

 Neuregulin-4 (Nrg4), a novel brown fat-enriched factor, has been reported to play a crucial role in developing metabolic disorders. The current case-control study aimed to investigate the association between serum Nrg4 and coronary artery disease (CAD).

 This study enrolled 43 patients with CAD and 43 subjects with normal coronary arteries diagnosed by coronary angiography. Anthropometric and biochemical parameters were measured and recorded. The serum Nrg4 level was determined using the enzyme-linked immunosorbent assay. The relationships between circulating Nrg4 and CAD and other clinical parameters were analyzed. A receiver operating characteristic analysis was applied to assess the utility of Nrg4 in identifying CAD.

The study population comprised 86 patients, including 64 men (74.4%), at a mean age of 57.83±6.01 years. Patients with CAD had significantly lower serum Nrg4 than the control group (P<0.001). The serum Nrg4 level was negatively correlated with anthropometric variables, including the body mass index, waist circumference, and the waist-to-hip ratio, fasting blood glucose, and the triglyceride-glucose index (P<0.05). In multivariable-adjusted regression analysis, the odds of CAD decreased by 46% per 1 SD elevation in the serum Nrg4 level (OR, 0.54; 95% CI, 0.40 to 0.73; P<0.001) after controlling for potential confounders. Nrg4 showed a significantly high area under the curve value (AUC, 0.85; 95% CI, 0.75 to 0.94) with 81.4% sensitivity and 95.3% specificity to identify CAD.

 Generally, the serum level of Nrg4 declines in patients with CAD, which might be an independent risk factor for CAD.

Cinnamon is extracted from the inner bark of Cinnamomum trees. Recent studies have indicated that cinnamon is a safe and cost-effective treatment for improving body weight, lipid profiles, insulin resistance, and blood pressure. This systematic review aimed to summarize the effect of cinnamon supplementation on adipokines and appetite-regulating hormones.

This comprehensive literature search was conducted using databases such as PubMed, Scopus, ISI Web of Science, and Google Scholar up to March 2022 without any limitation. The quality of eligible studies was evaluated through the Cochrane Collaboration’s tool for assessing the risk of bias.

This systematic review included six clinical trial studies (363 participants), among which, only one study was performed on children, and two investigations were conducted on obese participants. A decreasing effect was found in the level of leptin and visfatin after cinnamon supplementation. Two out of three studies examined adiponectin levels and revealed non-significant effects of cinnamon consumption on this parameter. Two studies evaluated ghrelin levels and found an increase after cinnamon supplementation. The result of cinnamon supplementation on other biomarkers such as glucose-dependent insulinotropic polypeptide, glucagon-like peptide 1, and resistin was inconsistent.

The result of this systematic review indicated the increasing effect of cinnamon supplementation on ghrelin levels and decreasing effect on leptin and visfatin levels. However, more clinical data are required to clarify the beneficial effects of cinnamon on adipokines levels due to the controversial findings of the studies.

Normal weight obesity (NWO), known as a syndrome, is characterized by normal weight and body mass index (BMI) but high adipose tissue (more than 30%).

The present study was conducted to investigate the relationship between adipokines and lipid factors as risk factors in cardiovascular diseases (CVDs) and NWO syndrome in women.

In this case-control study, anthropometric data were obtained from 20 - 40-year-oldwomenreferring to nutrition and diet clinics in Ahvaz, Iran. Then, based on the inclusion criteria, including normal BMI and no physical or mental illness, the subjects were divided into the NWO (body fat percentage (BF%) > 30) group and the non-NWO (BF% < 30) group depending on their BF%. Twenty blood samples were taken from each group, and their chemerin and adipokine serum levels were measured using both the enzyme-linked immunosorbent assay (ELISA) method with high sensitivity and the sandwich and competitive ELISA techniques.

The serum levels of adipokine chemerin and IL-1, IL-1 , IL-6, and tumor necrosis factor alpha (TNF-), as well as the serum concentrations of triglyceride (TG), low-density lipoprotein (LDL), and total cholesterol, were significantly higher in theNWOgroup than in the control group (P < 0.05).

The findings of this study indicated a significant correlation between chemerin, adipokines, and lipid factors, as CVD risk factors, andNWOsyndrome and fat tissue percentages in women. Therefore, fat tissue measurement is recommended as a more accurate index than BMI in predicting CVDs.

Chemerin abnormal level represents a risk indicator of visceral fat increase. It has a role in the incidence of inflammation, insulin resistance, metabolic syndrome, obesity, and diabetes. This study aimed to evaluate Chemerin level in diabetic type 2 patients with metabolic syndrome in both Genders. 

 This study was carried out on the patients referred to the Al-Yarmouk Teaching Hospital in 2021-2022. 88 participants were selected by random sampling method and were divided into two groups including T2DM patients with metabolic syndrome in the experience group (n=55) compared with healthy subjects in the control group (n=38). Triacylglycerol (TG), High-Density Lipoprotein-Cholesterol (HDL-c), Obesity (BMI), serum Chemerin, Hypertension (SBP), age, Fasting Blood Glucose (FBG), and Glycated Haemoglobin (HbA1C) were measured in the two studied groups. Data were analyzed using T-test through SPSS 21 Software.

 A significant difference was observed between the levels of BMI, SBP, FBG, TG, HDL-c, Chemerin weight, DBP, and HbA1c in the studied groups (p=0.05). The rate of WC and HDL-c was higher in the females than in males in the experience group. While, there was a significant increase in the rates of SBP, FBG, TG, and Chemerin in males than females. A positive correlation coefficient was observed between age, SBP, WC, BMI, FBG, TG, and HbA1c with Chemerin level in the experience group.

 An increase in Chemerin level is associated with a high level of triglycerides during the onset of symptoms of metabolic syndrome, age, and gender, which affect the increase of adipokine.

Adipocytokines secreted by adipose tissue are suggested to play a significant role in developing obesity-related complications. On the other hand, regular high-intensity interval training (HIIT) has been shown to reduce the risk of metabolic complications in obese subjects.

The effect of HIIT was evaluated on serum and adipose tissues (inguinal and retroperitoneal) adiponectin and TNF-α levels in rats fed with a high-fat diet plus sucrose solution (HFDS).

Thirty-two male Wistar rats were randomly divided into HFDS and standard diet (SD) groups. After 12 weeks, each group was divided into a sedentary group and a HIIT group. An HIIT program was performed three times/week for eight weeks. Inguinal and retroperitoneal adipose tissues and serum were collected to assay adiponectin and TNF-α levels. Also, serum glucose and insulin levels, insulin resistance index (HOMA-IR) were measured.

HFDS significantly increased weight gain, weight of inguinal (P = 0.001) and retroperitoneal fat depots (P < 0.001), and HOMA-IR (P < 0.001) but reduced serum TNF-α levels (P = 0.011). HIIT was able to decrease weight gain and fat mass (P < 0.05) but did not affect inguinal and retroperitoneal fat depots’ adipokines (adiponectin and TNF-α) levels and HOMA-IR (P > 0.05).

HIIT program can have significant reducing effects on weight gain and fat weights, but it does not effect on circulating and fat depots' adiponectin and TNF-α levels in rats fed a HFDS.

Exercise training and zataria multiflora exert anti-inflammatory effects alone and together; these anti-inflammatory effects are partly related to modulating adipokines secretion from adipose tissue. This research aimed to investigate the effect of combined training (aerobic-resistance) and zataria multiflora supplementation on serum resistin and retinol binding protein 4 (RBP-4) in sedentary women.

The present randomized clinical trial, under the registration number IRCT20200812048388N1, was conducted in the winter and spring of 2021. The participants included 40 overweight and obese women who were assigned in four groups (10 women in each group), namely combined training with zataria multiflora (TZ), combined training (T), zataria multiflora (Z), and placebo (C) groups. Each combined training session consisted of 30 min of aerobic exercise, followed by 30 min of resistance exercise. Zataria multiflora supplement was also consumed at 500 mg daily. We carried out blood sampling before and after (48 hours after the last training session) the intervention period and measured the serum levels of RBP-4 and resistin via ELISA method. For data analysis, the SPSS software version 24, and analysis of covariance (ANCOVA) with Bonferroni post-hoc tests were used.

We observed a significant decrease in RBP-4 levels of T compared to that of C group (P=0.045), and in TZ compared to C and Z groups (p <0.001). In addition, the obtained findings indicated a significant decrease in resistin of T compared to that of C group (P=0.046), and in TZ group compared to C and Z groups (p <0.001). In addition, there was a significant decrease in HOMA-IR of T and TZ groups compared to that of C and Z groups (p <0.05).

According to the results, Zataria multiflora supplementation amplified the anti-inflammatory properties of combined training and combined training effect in insulin resistance improvement. Furthermore, it was found to have a synergistic effect along with combined training.

Exercise training and omega-3 supplementation are believed to have a positive effect on obese and overweight people. We conducted the present study in order to investigate the effect of aerobic training and omega3 ingestion on the levels of Adipsin and insulin resistance in overweight and obese women. In this semi-experimental study conducted in Tehran, summer 2020, 40 overweight and obese women (aged from 20 to 35 years old, and BMI 29.6±1.93 kg.m2) were assigned in four equal groups, namely placebo (P), omega-3 (O), training (E), and training+omega-3 (OE) groups. The subjects in the training and training+omega-3 groups completed the eight-week (three sessions per week) aerobic training program. 2000 mg omega-3 supplement was consumed on a daily basis. Blood samples were obtained before and after completing the intervention and Adipsin and insulin levels were measured. The data were analyzed via repeated measures analysis of variance (ANOVA) test along with Tukey post-hoc test. The study was approved under the IRCT registration code of IRCT20200811048360N1. The findings of the present research shed light on a significant decrease in serum Adipsin levels in the E and OE groups compared to those in the P and O groups (p <0.05). Moreover, insulin resistance significantly decreased in E compared with that in the P group (P=0.012) and also in the OE group compared to that in the P (P=0.001) and O (P=0.009) groups. The present study indicated that omega-3 supplementation could increase the effect of exercise training on the reduction in the Adipsin and insulin resistance; further effects may be observed by increasing the duration of exercise training period.

Physical activity (PA) and obesity are effective interventions for hypertension. The current study is a review to explain possible mechanisms related to the effects of PA and obesity on hypertension. To this end, several scientific databases were searched using the keyword "hypertension" and also some English articles related to obesity and PA were investigated. Then, the mechanisms of obesity and PA associated with hypertension were extracted from the collected articles. Overall, obesity causes an increase in renin-angiotensin-aldosterone (RAA) systems, harmful changes in lipid and lipoprotein profile, a decrease in insulin sensitivity, as well as harmful changes in adipokines, oxidative stress, and inflammatory factors. PA improves the above-mentioned changes caused by obesity. Overall, PA mainly via an effect on oxidative stress, inflammation, endothelial cells, the elasticity of arteries, body weight, the activity of the RAA system, activity of parasympathetic and renal function as well as improve the insulin sensitivity has positive effects on hypertension. It should be noted that the effects of PA against hypertension is highly variable and they are related to PA modes, environmental and genetic factors.

Obesity was associated with high serum vaspin concentrations and increased vaspin mRNA expression in human adipose tissue , insulin resistance, and type II diabetes. However, the mechanisms how vaspin secretion may be linked to deterioration of glucose metabolism and insulin sensitivity are not understood. The aim of this work is to explore the effect of dietary regimen for 6 months on serum vaspin levels in obese diabetic and non diabetic female patients. The study was carried out in Zagazig University Hospital and Obesity management and research unit. The sample size was 40 obese female patients. All participants were screened to determine the eligibility for participation in the study according to specific inclusion and exclusion criteria.Control groups didnchr('39')t follow any diet plan while mediterrnean diet group followed mediterrnean diet for 6 months. The following parameters were assessed at the beginning and after 6months:body mass index(BMI), waist circumference(WC),Homeostatic model assessment (HOMA), Atherogenic index (AI), creatinine clearance  and circulating levels of vaspin, vitamin D ,Low density lipoprotein (LDL), High density lipoprotein (HDL), Triglyecrides (TG), Total cholesterol  (TC), glucose,insulin,HbA1c, Superoxide dismutase (SOD) and Malondialdehyde (MDA). Mediterrnean diet life style for 6 months resulted in a significant decrease in BMI, WC, HOMA, AI, vaspin, LDL, TG, TC,glucose,insulin,HbA1c  and MDA with a significant increase in HDL,SOD and vitamin D. Elevated  serum vaspin and low Vit D levels  are encountered in obesity. So, vaspin may be used as a novel biomarker for obesity, insulin resistance and Type II DM management.

Zinc as one of the important trace elements in human health has been suggested to be a supplement for modifying the level of adipokines, whereas findings from studies have been inconsistent. This study aimed to systematically review the evidence provided by randomized controlled trials (RCTs) regarding the effect of zinc supplementation on serum adipokines levels.

PubMed, Google Scholar, Web of Science, and Scopus were systematically searched up to June 2019. The mean differences and their corresponding standard deviations (SDs) of changes in serum adipokines levels were used as effect size.

Eight eligible RCTs (leptin n=6, adiponectin n=3) were included in the current study. There were no significant changes in serum leptin levels [weighted mean difference (WMD) =0.60 ng/ml, 95% confidence interval (CI): -1.78, 2.99; I-squared (I2) = 64.3%] and adiponectin levels (WMD = 1.09 ng/ml, 95% CI: -0.76, 3.18, I2 = 78.8%) following zinc supplementation compared to placebo group. These findings did not change after considering several subgroups including gender, study duration, health status, body weight and the type of zinc used for supplementation.

No evidence was found to support the efficacy of dietary zinc supplements on serum levels of adipokines. Further, high-quality, long-term controlled clinical trials are warranted to confirm these findings.

Beta thalassemia (b-thalassemia) is a type of inherited blood disorder characterized by the impaired production of beta globin chains. b-Thalassemia can be categorized into three subtypes according to symptom severity: b-thalassemia minor, b-thalassemia intermedia, and b-thalassemia major. Adipose tissue functions as an endocrine gland by synthesizing and secreting an array of bioactive peptides including leptin, adiponectin, and resistin.

We recruited 30 participants who were transfusion dependent b-thalassemia patients (major) and 30 participants who were non-transfusion dependent b-thalassemia patients (minor). The control group consisted of 20 healthy individuals. Analysis of the demographic profile, hematological profile, biochemical parameters, and serum adipokine concentrations (leptin, adiponectin and resistin) were performed for all participants.

Our results showed that leptin serum levels were significantly lower in the b-thalassemia major group compared with the b-thalassemia minor group or healthy individuals, while serum levels of adiponectin were significantly higher in b-thalassemic patients compared with healthy controls. Serum levels of resistin were significantly higher in b-thalassemic patients compared with the healthy control group. A significant negative correlation was noted between adiponectin and BMI in b-thalassemic patients, whereas leptin was observed to have a significant positive correlation with BMI in the control group. Leptin was observed to have a significant negative correlation with adiponectin and ferritin in the b-thalassemia major group.

The changes we observed in adipokine levels may play a role in the development of the complications related to b-Thalassemia and disease severity.

Adiponectin, an adipokine secreted by adipocytes, is a well‑known homeostatic factor for regulating glucose levels, lipid metabolism, and insulin sensitivity through its anti‑inflammatory, anti‑fibrotic, and antioxidant effects. All these metabolic processes are mediated via two adiponectin receptors, AdipoR1 and AdipoR2. In addition, adiponectin is one of the hormones with the highest plasma concentrations. Weight loss or caloric restriction leads to increasing adiponectin levels, and this increase is associated with increased insulin sensitivity. Therefore, the adiponectin pathway can play a crucial role in the development of drugs to treat type 2 diabetes mellitus and other obesity‑related diseases affected by insulin resistance like cancers or cardiovascular diseases. Adiponectin appears to increase insulin sensitivity by improving glucose and lipid metabolisms. The objective of this review is to analyze current knowledge concerning adiponectin and, in particular, its role in physiology and pathophysiology

This study investigated the effect of non-surgical periodontal treatment on clinical indices and salivary levels of visfatin, chemerin, and progranulin in diabetic patients with periodontitis.

This interventional clinical trial was performed on 20 patients with type II diabetes mellitus (T2DM) with moderate to severe chronic periodontitis (periodontitis stages II or III according to the new classification of periodontal diseases). Clinical indices, including gingival index (GI), probing pocket depth (PPD), clinical attachment level (CAL) and plaque index (PI), were recorded and visfatin, chemerin, and progranulin adipokines levels were also measured in unstimulated saliva by ELISA technique at baseline and twelve weeks after non-surgical periodontal treatment.

GI dropped from 1.92±0.27 to 0.71±0.14 after the intervention (P<0.001). Also, there were significant changes in the PPD and PI (P<0.001). However, no significant changes were observed in the CAL (P<0.05). The concentrations of all three salivary adipokines decreased after treatment, but this change was statistically significant only for progranulin (P<0.05).

Non-surgical periodontal therapy resulted in improvements in the clinical indices of GI, PPD, and PI in T2DM patients with periodontitis. Moreover, the significant reduction in the salivary level of progranulin after treatment suggests that it might be considered a target inflammatory marker in periodontal diseases.

Adipose tissue-derived hormones known as adipokines, like leptin, have multiple bioactions. Notwithstanding the key roles of leptin in regulating energy homeostasis and metabolism, its cardiovascular functions are complex and not fully understood. This study aimed to investigate the association between serum concentrations of leptin and lipid profiles in patients with valve calcification. Seventy-two patients with valve calcification and 72 healthy individuals participated in this case-control study. The serum levels of biochemical markers and leptin were measured by the standard enzymatic methods and enzyme-linked immunosorbent assay (ELISA) technique, respectively. Significantly increased serum concentrations of FBS (P=0.001), urea (P<0.0001), creatinine (P=0.018), P (P<0.0001), LDL-C (P=0.011) and lower Ca (P=0.006), and HDL-C (P<0.0001) levels were observed in patients compared to controls. There was no significant difference in the serum level of TG and TC of patients than controls. Systolic and diastolic blood pressures were significantly increased in patients relative to controls (P<0.0001). However, a significantly diminished serum level of leptin was observed in patients than controls (P<0.0001). The correlation analysis demonstrated that the serum leptin concentration is negatively correlated with creatinine, but it is positively correlated with systolic blood pressure (P=0.0302, P=0.0362, respectively). There was no statistically significant association between serum levels of leptin and lipid profiles. Our findings indicated dyslipidemia and reduced serum leptin concentrations in patients with valve calcification, suggesting the role of lipid abnormalities and reduced leptin levels in the development and pathogenesis of valve calcification diseases.

Obesity is considered a worldwide important health problem with continuously increasing prevalence, particularly among postmenopausal women. Weight gain is one of the major concerns of menopause. Understanding the contributing factors to postmenopausal obesity helps to reduce its incidence and thus its associated health complications. The present study aimed to review the role of ghrelin in mediating postmenopausal obesity.

A literature review was done to understand the possible association between ghrelin levels and obesity in postmenopausal women.

It was found that the lack of estrogen during menopause increases the serum ghrelin level. In addition, the results revealed that ghrelin stimulates appetite, changes food preference, and causes an accumulation of visceral fat resulting in weight gain. On the other hand, ghrelin was found to have many protective effects as an anti-inflammatory and a neuroprotective agent.

In general, the ghrelin hormone is a double-edged sword as it mediates the increase of body weight in postmenopausal women. More importantly, it plays a considerable role in protecting postmenopausal women from cardiovascular and neurodegenerative diseases. The selective blockage of appetite-stimulating and metabolic effects of ghrelin may be of a potential prophylactic or therapeutic effect for postmenopausal overweight and obesity