COVID-19 Outcome Relates With Circulating BDNF, According to Patient Adiposity and Age

Background and Aims: We evaluated adipose tissue-derived hormones, body composition, serum metabolic profile, levels of brain-derived neurotrophic factor (BDNF), and the association of these parameters with the clinical outcome in patients with COVID-19. We sought to examine whether obesity, sex, and age influence the adipose tissue endocrine response to the disease.Methods: This prospective study investigated 145 hospitalized patients with COVID-19. Patients were categorized based on their body mass index (BMI), sex and age, and were also classified regarding their outcome after hospitalization as: (a) Non-ICU: patients hospitalized who did not receive intensive care; (b) ICU-survivor: patients admitted to the intensive care unit and discharged; (c) ICU-death: patients who died. Blood samples were collected by the hospital staff between the first and third day of hospitalization. Serum leptin, adiponectin and BDNF concentrations, triglycerides, total cholesterol and cholesterol fractions were performed following the manufacturer's guidelines.Results: We demonstrate that BDNF levels predict intensive care (IC) need (p < 0.01). This association was found to be stronger in patients >60y (p = 0.026). Neither leptin nor adiponectin concentration was associated with IC requirement or with patient's outcome, while the BDNF/adiponectin ratio was closely associated with worsened outcomes (p < 0.01). BDNF concentration was similar between sexes, however tended to be lower in male patients (p = 0.023). In older patients, BDNF concentration was lower than that of younger patients (p = 0.020). These age and sex-specific differences should be considered when employing these potential markers for prognosis assessment. While appetite and body composition regulating hormones secreted by the white adipose tissue are not reliable predictors of disease severity, the ratio BDNF/adiponectin was indicative of patient status.Conclusion: Thus, we propose that serum BDNF content and BDNF/adiponectin ratio may serve as tools predicting worsened prognosis in COVID-19, especially for male patients.

Antioxidant Potential of Adiponectin and Full PPAR-γ Agonist in Correcting Streptozotocin-Induced Vascular Abnormality in Spontaneously Hypertensive Rats

Oxidative stress, which is associated with metabolic and anthropometric perturbations, leads to reactive oxygen species production and decrease in plasma adiponectin concentration. We investigated pharmacodynamically the pathophysiological role and potential implication of exogenously administered adiponectin with full and partial peroxisome proliferator-activated receptor-gamma (PPAR-γ) agonists on modulation of oxidative stress, metabolic dysregulation, and antioxidant potential in streptozotocin-induced spontaneously hypertensive rats (SHR). Group I (WKY) serves as the normotensive control, whereas 42 male SHRs were randomized equally into 7 groups ( n = 6 ); group II serves as the SHR control, group III serves as the SHR diabetic control, and groups IV, V, and VI are treated with irbesartan (30 mg/kg), pioglitazone (10 mg/kg), and adiponectin (2.5 μg/kg), whereas groups VII and VIII received cotreatments as irbesartan+adiponectin and pioglitazone+adiponectin, respectively. Diabetes was induced using an intraperitoneal injection of streptozotocin (40 mg/kg). Plasma adiponectin, lipid contents, and arterial stiffness with oxidative stress biomarkers were measured using an in vitro and in vivo analysis. Diabetic SHRs exhibited hyperglycemia, hypertriglyceridemia, hypercholesterolemia, and increased arterial stiffness with reduced plasma adiponectin and antioxidant enzymatic levels ( P < 0.05 ). Diabetic SHRs pretreated with pioglitazone and adiponectin separately exerted improvements in antioxidant enzyme activities, abrogated arterial stiffness, and offset the increased production of reactive oxygen species and dyslipidemic effects of STZ, whereas the blood pressure values were significantly reduced in the irbesartan-treated groups (all P < 0.05 ). The combined treatment of exogenously administered adiponectin with full PPAR-γ agonist augmented the improvement in lipid contents and adiponectin concentration and restored arterial stiffness with antioxidant potential effects, indicating the degree of synergism between adiponectin and full PPAR-γ agonists (pioglitazone).

The Controversial Role of Adiponectin in Appetite Regulation of Animals

Eating disorders and obesity are important health problems with a widespread global epidemic. Adiponectin (AdipoQ), the most abundant adipokine in the plasma, plays important roles in the regulation of energy homeostasis, glucose metabolism and lipid metabolism. Plasma adiponectin concentration is negatively associated with obesity and binge eating disorder. There is a growing interest in the appetite regulation function of adiponectin. However, the effect of AdipoQ on feeding behavior is controversial and closely related to nutritional status and food composition. In this review, we summarize the literatures about the discovery, structure, tissue distribution, receptors and regulation of nutritional status, and focus on the biological function of adiponectin in the regulation of food intake in the central and peripheral system.

Correlation between age, testosterone and adiponectin concentrations, and sperm abnormalities in Simmental bulls

Background and Aim: Capacity for sperm production is affected by age, which is related to the morphology of sperm abnormalities and can affect fertility. The aim of this study was to evaluate the relationship between age and concentrations of testosterone and adiponectin with sperm abnormalities in Simmental bulls. Materials and Methods: The study used 11 bulls, separated into three groups. The first group consisted of five bulls aged 4-5 years, and the second and third groups each consisted of three bulls, aged 6-7 and 8-10 years, respectively. The average sperm motility of the animals ranged from 57.66±2.60% to 70.17±0.22%. Blood samples were obtained from the coccygeal region of the animals. Testosterone and adiponectin analysis was performed using the enzyme-linked immunosorbent assay method. Sperm morphology was evaluated using carbol fuchsin-eosin staining according to the Williams method. Finally, correlations between testosterone and adiponectin concentrations, age, and sperm abnormalities were analyzed using Pearson's correlation analysis. Results: The findings revealed a significant correlation (p<0.01) between the concentrations of testosterone and adiponectin (–0.538), age (–0.588), and abnormal sperm morphology (–0.912). Moreover, they revealed that the concentration of testosterone in the bulls aged 8-10 years was lower, at 21.89±4.56 ng/mL, compared to that in the bulls aged 4-5 years, at 36.15±1.29 ng/mL, and 6-7 years, at 35.16±5.39 ng/mL. The findings also revealed a positive correlation between adiponectin concentration and age (0.529) and sperm abnormalities (0.506). The increase in testosterone concentration was inversely related to the adiponectin concentration (–0.538). Moreover, the mean amount of abnormal sperm increased with increasing age: 3.82±0.33% in the group aged 4-5 years, and 4.40±0.72% and 10.20±1.97% in the groups aged 6-7 years and 8-10 years, respectively. Conclusion: The study data indicate that there is a decrease in testosterone concentration, a high adiponectin concentration, and an increase in abnormal sperm with increasing age in bulls.

12α-Hydroxylated bile acid enhances accumulation of adiponectin and immunoglobulin A in the rat ileum

We previously reported that dietary supplementation with cholic acid (CA), the primary 12α-hydroxylated (12αOH) bile acid (BA), reduces plasma adiponectin concentration in rats. The aim of this study was to examine the distribution of adiponectin in the body of CA-fed rats and its influence on mucosal immunoglobulin A concentration in the intestine. Rats were fed a diet supplemented with or without CA (0.5 g CA/kg diet) for 13 weeks. A reduction in plasma adiponectin level was observed from week 3. At the end of the experiment, the CA diet reduced plasma adiponectin concentration both in the portal and aortic plasma. Accumulation of adiponectin was accompanied by an increase in cadherin-13 mRNA expression in the ileal mucosa of CA-fed rats. No increase was observed in adiponectin mRNA expression in the ileal and adipose tissues of the CA-fed rats. Immunoglobulin A concentration in the ileal mucosa was elevated in the CA-fed rats and was correlated with the ileal adiponectin concentration. 12αOH BAs may modulate mucosal immune response that are involved in the accumulation of adiponectin in the ileum.

POS0558 STATE OF ADIPOCYTOKINES IN PATIENTS WITH RHEUMATOID ARTHRITIS WITH SUBCLINICAL ATHEROSCLEROSIS

Background:The causes of accelerated atherosclerosis in rheumatoid arthritis (RA) are not completely understood [1]. Therefore, there is a need to identify new biomarkers of increased cardiovascular risk in RA.Objectives:To establish the relationship of adipocytokines (adiponectin and leptin) with metabolic and inflammatory markers of subclinical atherosclerosis in RA patients.Methods:The study included 88 women with RA according to the ACR (American College of Rheumatology)/EULAR (European League Against Rheumatism) criteria, 2010 [2] who visited the adaptation therapy clinic of Orenburg State Medical University. The mean±SD age was 46.43±8.5 years and the mean±SD disease duration was 8.21±5.56 years.We evaluated the following laboratory parameters in all patients: erythrocyte sedimentation rate (ESR), total cholesterol, triglycerides (TAG), high-density lipoproteins (HDL), low-density lipoproteins (LDL) and C-reactive protein (CRP). Serum concentrations of adiponectin, leptin, rheumatoid factor (RF), tumor necrosis factor-α (TNF-α), and interleukin-17 (IL-17) were determined by enzyme-linked immunosorbent assay (ELISA).We carried out ultrasound (US) duplex scanning of the carotid arteries by the device “Philips Epiq 7” with linear transducer with frequency of 4-18 MHz with the division into 2 groups of patients: group I consisted of 44 women with US signs of subclinical atherosclerosis, group II – 44 women without these signs. The control group included 30 women without inflammatory joint diseases and US signs of subclinical atherosclerosis and similar in gender, age and body mass index (BMI) to RA patients.The program STATISTICA, 12.0 was used for statistical analysis.Results:The serum adiponectin level was significantly higher in RA patients compared to the control group (p<0.0001): 40.88±13.60 ng/ml versus 22.75±11.27 ng/ml. The level of leptin in the blood serum of women with RA and healthy individuals was approximately the same and amounted to 18.07±14.02 ng/ml and 16.60±11.45 ng/ml respectively. When comparing the levels of adipocytokines in RA patients, the predominance of concentrations of both adipokines in patients with paraclinical atherosclerosis were noted. The adiponectin concentration was 46.08±14.44 ng/ml versus 35.70±10.51 ng/ml (p<0.001). The leptin level was 26.40±20.06 ng/ml versus 14.96±16.62 ng/ml (p<0.01).Correlation analysis showed an negative relationship between adiponectin levels and metabolic markers of atherosclerosis: BMI (r=-0.52; p<0.05), neck circumference (NC) (r=-0.50; p<0.05), levels of LDL (r=-0.77; p<0.001) and TAG (r=-0.59; p<0.05) as well as proinflammatory cytokines: TNF-α (r=-0,48; p<0.05), IL-17 (r= -0.60; p<0.01) in patients of both groups. The increase in adiponectin concentration in group II patients was associated with the duration of administration of methotrexate (r=0.49; p<0.05) and glucocorticosteroids (r=0.71; p<0.001). Direct correlations were found between the level of leptin and BMI (r=0.48; p<0.05), NC (r=0.48; p<0.05), LDL (r=0.54; p<0.05) and TAG (r=0.45; p<0.05), CRP (r=0.49; p<0.05) and IL-17 (r= 0.52; p<0.05) in group I patients.Conclusion:There is a significant increase in the production of adipocytokines in RA with subclinical atherosclerosis. Correlations of levels of adipokines with metabolic and inflammatory markers of atherosclerosis, on the one hand, indicate the influence of adipose tissue on systemic inflammation and, on the other hand, confirm the involvement of proinflammatory cytokines in the development of atherosclerotic vascular damage in patients with RA.References:[1]Mahmoudi M, Aslani S, Fadaei R, Jamshidi AR. New insights to the mechanisms underlying atherosclerosis in rheumatoid arthritis. Int J Rheum Dis. 2017;20(3):287-297. doi: 10.1111/1756-185X.12999[2]Aletaha D, Neogi T, Silman AJ, et al. 2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative. Ann Rheum Dis. 2010;69:1580—8. doi:10.1136/ard.2010.138461Disclosure of Interests:None declared

Breed and age effects on concentration of adiponectin and reproductive performance in Anglo Nubian, Etawah grade and its crossbred bucks

Hafizuddin, Karja NWK, Praharani L, Setiadi MA. 2021. Breed and age effects on concentration of adiponectin and reproductive performance in Anglo Nubian, Etawah grade and its crossbred bucks. Biodiversitas 22: 1112-1119. The purpose of this study was to evaluate the effect of differences in breed and age on reproductive performance and adiponectin and testosterone production in Anglo Nubian, Etawah grade, and crossbred (Anpera) bucks. A total of 12 bucks with four individuals of each breed were used. This study collected five data points from each buck regarding adiponectin, testosterone, and reproductive performance (libido and semen characteristics). Data were analyzed with factorial analysis of variance and Duncan's test. The result shows that adiponectin concentration between breeds was significantly different (P <0.01). There were also significant differences (P<0.05) in adiponectin concentrations based on buck age. There were also significant interactions with adiponectin concentrations (P <0.01). Furthermore, testosterone concentrations showed significant differences based on breed (P <0.05) and age (P <0.05). There were also significant age-breed interactions affecting testosterone concentrations (P <0.01). Libido and semen characteristics had no significant differences based on breed and age group, and no significant age-breed interactions (P> 0.05). The heterosis effect on adiponectin concentration (48.05%), testosterone concentration (27.68%), libido (-0.61%), semen volume (-1.93%), sperm motility (0.49%), sperm normal morphology (0.18%), and sperm concentration (0.00%) was measured. In conclusion, there is a significant effect of breed, age, and age-breed interactions on the concentration of adiponectin and testosterone in bucks, and both of these variables have a high heterosis effect on crossbred bucks.

Kidney damage in patients with chronic heart failure and obesity: the role of leptin and adiponectin

Objectives: to assess the functional state of the kidneys and cardiovascular risk in relation to the level of leptin and adiponectin in patients with chronic heart failure (CHF) and obesity.Materials and methods: a total of 116 patients with CHF of I-III functional class (FC) 45-65 years old were examined, which were divided into three comparable groups depending on body mass index (BMI).Results: a statistically significant decrease in glomerular filtration rate (GFR), a significant increase in the level of albuminuria (AC) and β2-microglobulins (β2-MG) among patients with chronic heart failure and obesity were revealed. The leptin level significantly increased from the 1st to the 3rd group, the adiponectin concentration decreased from the 1st to the 3rd group. Significant correlations were established between the concentrations of adipokines, HOMA-IR and GFR, AC, β2-MG in the group of individuals with heart failure and obesity.Conclusions: reliable deterioration of renal functional parameters in patients with CHF, statistically significant relationships between GFR, AC, β2-MG and adipokines, HOMA-IR with increasing body weight, as well as an increase in the combined risk of CKD progression and the development of cardiovascular complications with comparable FC were established.

Ciglitazone Increases Adiponectin and Adipogenic Gene Expression in Bovine Skeletal Muscle Satellite Cells

Background: Ciglitazone is a member of the thiazolidinedione (TZD) family, and specifically binds to peroxisome proliferator-activated receptor-γ (PPARγ) , thereby promoting adipocyte differentiation. We hypothesized that ciglitazone as a PPARγ ligand in the absence of an adipocyte differentiation cocktail would increase adiponectin and adipogenic gene expression in bovine satellite cells (BSC).Methods: Muscle-derived bovine satellite cells were isolated from six, 18-month-old Yanbian Yellow Cattle. The BSC were cultured for 96 h in differentiation medium containing 5 µM ciglitazone (CL), 10 µM ciglitazone (CM), or 20 µM ciglitazone (CH). Control (CON) BSC were cultured only in differentiation medium (containing 2% horse serum).Results: The presence of myogenin, desmin, and paired box 7 (Pax7) proteins were confirmed in the BSC by immunofluorescence staining. The CL, CM, and CH treatments produced higher concentrations of triacylglycerol and lipid droplet accumulation in myotubes than those of the CON treatment. Ciglitazone treatments significantly increased the relative expression of PPARγ , CCAAT/enhancer-binding protein alpha (C/EBPα), C/EBPβ, fatty acid synthase stearoyl-CoA desaturase (SCD) and perilipin 2. Ciglitazone treatments increased gene expression of paired box 3 (Pax3) and Pax7 and decreased expression of myogenic differentiation-1, myogenin, myogenic regulatory factor-5 (MRF5), and MYF4 (P < 0.01). Adiponectin concentration caused by ciglitazone treatments was significantly greater than CON (P < 0.01). RNA sequencing showed that 281 differentially expressed genes (DEGs) were found in the treatments of ciglitazone. DEGs gene ontology (GO) analysis showed that the top 10 GO enrichment significantly changed the biological processes such as protein trimerization, negative regulation of cell proliferation, adipocytes differentiation, and cellular response to external stimulus. KEGG pathway analysis showed that DEGs were involved into p53 signaling pathway, PPAR signaling pathway, biosynthesis of amino acids, TNF signaling pathway, non-alcoholic fatty liver disease (NAFLD), PI3K-Akt signaling pathway, and Wnt signaling pathway.Conclusion: These results indicate that ciglitazone acts as PPARγ agonist, effectively increasing the adiponectin concentration and adipogenic gene expression, and stimulating the conversion of BSC to adipocyte-like cells in the absence of adipocyte differentiation cocktail.