Plasma Level of Retinol-Binding Protein 4, N-Terminal proBNP and Renal Function in Older Patients Hospitalized for Heart Failure

Background/Aim: Elevated plasma concentration of retinol-binding protein 4 (RBP4) has recently emerged as a potential new risk factor for cardiovascular diseases, including hypertension (HT) and coronary artery disease (CAD). Limited data suggest that RBP4 promotes inflammatory damage to cardiomyocytes and participates in the development of heart failure (HF). This study aimed to analyze the relationship between concentrations of plasma RBP4 and serum N-terminal proBNP (NT-proBNP), a powerful biomarker of left ventricle dysfunction, in the older Polish population. Methods: The study sample consisted of 2,826 (1,487 men) participants of the PolSenior study, aged 65 years and older, including a subgroup hospitalized for HF (n = 282). In all subjects, plasma concentrations of RBP4, interleukin-6 (IL-6), serum level of NT-proBNP, and hs-CRP were measured. Additionally, BMI, estimated glomerular filtration rate (eGFR), and HOMA-IR were calculated. The prevalence of HT, CAD, atrial fibrillation (AF), and medication were considered as potential confounders. Results: Similar RBP4 levels were found in subjects with NT-proBNP < 125 and ≥125 ng/mL, with and without AF, and in the subgroups hospitalized for HF with and without AF. Regression analysis revealed no association between log10(NT-proBNP) and log10(RBP4). Plasma levels of RBP4 were increased by HT occurrence and diuretic therapy, while diminished with regard to female gender, age, eGFR values, AF, and IL-6 levels. Conclusion: Our results show that RBP4 is affected by GFR but cannot be considered as an independent biomarker of heart muscle dysfunction.

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Retinol-Binding Protein 4 and Lipocalin-2 in Childhood and Adolescent Obesity: When Children Are Not Just “Small Adults”

Clinical Chemistry ◽

10.1373/clinchem.2007.099002 ◽

2008 ◽

Vol 54 (7) ◽

pp. 1176-1182 ◽

Cited By ~ 39

Author(s):

Christina Kanaka-Gantenbein ◽

Alexandra Margeli ◽

Panagiota Pervanidou ◽

Sophia Sakka ◽

George Mastorakos ◽

...

Keyword(s):

Insulin Resistance ◽

Binding Protein ◽

Assessment Model ◽

Retinol Binding Protein ◽

Morbidly Obese ◽

Homa Index ◽

Lipocalin 2 ◽

Obese Adults ◽

Retinol Binding Protein 4 ◽

Hs Crp

Abstract Background: Although there is much evidence regarding the physiologic and pathogenic roles of the newly described adipokines retinol-binding protein 4 (RBP4) and lipocalin-2 as potential promoters of insulin resistance in obese adults, relatively little information exists regarding their roles in obese children. Methods: We investigated the circulating concentrations of RBP4 and lipocalin-2 in 80 obese girls (ages 9– 15 years) and their relationships with high-sensitivity C-reactive protein (hs-CRP) and the adipokines leptin and adiponectin. We divided participants by their body mass index standard deviation scores (BMI SDSs) into 4 groups of 20 girls each: overweight [mean BMI SDS (SD), 1.8 (0.4)], obese [2.2 (0.4)], morbidly obese [3.6 (0.4)], and lean controls [−0.11 (0.4)]. We measured plasma-soluble RBP4, the RBP4-binding protein transthyretin, lipocalin-2, hs-CRP, leptin, and adiponectin and calculated the homeostatic assessment model (HOMA) index from fasting glucose and insulin concentrations. Results: Unexpectedly, plasma RBP4 and lipocalin-2 concentrations were correlated negatively with BMI SDS values (P = 0.005, and P < 0.03, respectively). These results were different from those of adults and were not correlated with the HOMA index. In contrast, hs-CRP and leptin concentrations were positively correlated with BMI SDS values (P < 0.0001, and P < 0.00001, respectively), as expected, whereas the adiponectin concentration was negatively correlated (P = 0.008). Conclusions: Although the correlations of leptin, adiponectin, and hs-CRP concentrations with BMI in children are similar to those of adults, the correlations of RBP4 and lipocalin-2 with BMI in children are the inverse of those observed in adults. Thus, although systemic inflammation and mild insulin resistance are present in childhood obesity, RBP4 and lipocalin-2 concentrations are not increased in children as they are in obese adults with long-standing severe insulin resistance and type 2 diabetes.

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Retinol Binding Protein 4 Levels relate to the presence and severity of coronary artery disease

Journal of Medical Biochemistry ◽

10.5937/jomb0-28846 ◽

2021 ◽

Author(s):

Gokay Nar ◽

Sara Cetin Sanlialp ◽

Rukiye Nar

Keyword(s):

Coronary Artery Disease ◽

Coronary Artery ◽

Binding Protein ◽

Retinol Binding Protein ◽

Serum Retinol ◽

Retinol Binding Protein 4 ◽

Coronary Syndrome ◽

Artery Disease ◽

The Relationship

Background: The prevous studies has showed that serum retinol binding protein 4 (RBP4) levels increased in metobolic disorders which are closely associated with cardiovascular dieases (CVD). However the human studies investigating the role of RBP4 in CVD are conflicted. Therefore, we aimed to evaluate the relationship between RBP4 and the presence and the severity of coronary artery disease (CAD) in this study. Methods: 55 patients with presenting acute coronary syndrome (ACS) and 43 control subjects who had various cardiovascular risk factors with normal coronary artery on coronary angiography were included in this study.The serum RBP4 concentrations were measured using ELISA method and clinically and anatomically score models were used to asses the severity of coronary lesion. Results: Serum RBP4 level was significantly higher in patients with ACS compared to the controls (68.40 ± 47.94 mg/L vs. 49.46 ± 13.64 mg/L; p = 0.014). RBP4 was correlated with GENSINI and SYNTAX I score (r = 0,286 p=0,034; r = 0.403 p = 0.002 respectively). However, there was no relationship between RBP4 and GRACE score. Conclusion: Patients with ACS had increased serum RBP4 levels and its high levels were correlated with CAD severity.

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