scholarly journals RBP4: A Culprit for Insulin Resistance in End Stage Renal Disease That Can Be Cleared by Hemodiafiltration

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Fabrizio Grosjean ◽  
Pasquale Esposito ◽  
Rosario Maccarrone ◽  
Carmelo Libetta ◽  
Antonio Dal Canton ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Adipose Tissue ◽  
Kidney Transplant ◽  
Glucose Transporter ◽  
Serum Levels ◽  
Tissue Expression ◽  
Serum Glucose ◽  
Retinol Binding Protein ◽  
Retinol Binding Protein 4 ◽  
Glut4 Expression

Introduction. Retinol Binding Protein 4 (RBP4) is mainly excreted by the kidney and plays a pivotal role in insulin resistance (IR). In our study, we evaluated the association between RBP4 and IR in hemodialysis subjects (HD). We also assessed how circulating RBP4 could be influenced by kidney transplant or different dialytic techniques.Methods. RBP4 serum levels were evaluated in HD (n=16) and matched healthy controls (C;n=16). RBP4 and glucose transporter type 4 (GLUT4) mRNA expressions were also determined in adipose tissue. Circulating RBP4 was evaluated after kidney transplant (n=7) and in hemodialysis patients (n=10) enrolled in a cross-over study treated with standard bicarbonate dialysis (BD) or hemodiafiltration (HDF).Results. HOMA index (P<0.05) and serum RBP4 (P<0.005) were higher in HD compared to C. RBP4 levels positively correlated with fasting serum glucose (P<0.05). RBP4 mRNA was lower in HD compared to C (P<0.05) and positively correlated with kidney function (P<0.05) and GLUT4 mRNA (P<0.001). Transplant or HDF reduced circulating RBP4 (P<0.01andP<0.05, resp.). Our results demonstrate that IR is associated with high circulating RBP4 and that suppressed RBP4 adipose tissue expression is accompanied by reduced GLUT4 expression in HD. Renal transplantation or HDF are effective in lowering serum RBP4 levels.

Role of adiponectin and PBEF/visfatin as regulators of inflammation: involvement in obesity-associated diseases

2008 ◽  
Vol 114 (4) ◽  
pp. 275-288 ◽  
Author(s):  
Herbert Tilg ◽  
Alexander R. Moschen
Keyword(s):  
Insulin Resistance ◽  
Adipose Tissue ◽  
Clinical Medicine ◽  
Binding Protein ◽  
Retinol Binding Protein ◽  
Acid Oxidation ◽  
Endothelial Cell Function ◽  
Retinol Binding Protein 4 ◽  
Associated Diseases ◽  
Anti Inflammatory

Obesity and obesity-related disorders play an important role in clinical medicine. Adipose tissue, with its soluble mediators called adipocytokines, has emerged as a major endocrine organ. These adipocytokines comprise many mediators such as adiponectin, PBEF (pre-B-cell-enhancing factor)/visfatin, leptin, resistin, retinol-binding protein-4 and others. They play major roles in key aspects of metabolism, such as insulin resistance, fatty acid oxidation, inflammation and immunity. Adiponectin, a prototypic adipocytokine, is of importance in the regulation of insulin resistance, as circulating levels are decreased in obesity and diseases associated with insulin resistance. Besides its major role in regulation of insulin sensitivity, recent evidence suggests potent anti-inflammatory functions for adiponectin. These effects are paralleled by other immune-regulatory properties, such as regulation of endothelial cell function. The in vitro effects of adiponectin have been corroborated by several studies demonstrating potent in vivo anti-inflammatory effects. Many other adipocytokines, such as PBEF/visfatin, leptin, resistin or retinol binding protein-4, are involved in the physiology and pathophysiology of adipocytes, adipose tissue and related diseases. PBEF/visfatin, another recently characterized adipocytokine, has been linked to several inflammatory disease states beyond insulin resistance, such as acute lung injury or inflammatory bowel diseases. It has been recognized for many decades that obesity is accompanied by an increase in cancer and potentially some immune-mediated diseases. Understanding this new exciting world of adipocytokines will be of importance in the development of novel therapies for obesity-associated diseases.

scholarly journals Associations between Tissue Visfatin/Nicotinamide, Phosphoribosyltransferase (Nampt), Retinol Binding Protein-4, and Vaspin Concentrations and Insulin Resistance in Morbidly Obese Subjects

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Zeynep Goktas ◽  
Shannon Owens ◽  
Mallory Boylan ◽  
David Syn ◽  
Chwan-Li Shen ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Adipose Tissue ◽  
Binding Protein ◽  
Retinol Binding Protein ◽  
Morbidly Obese ◽  
Tissue Samples ◽  
Blood Concentrations ◽  
Nicotinamide Phosphoribosyltransferase ◽  
Retinol Binding Protein 4 ◽  
Obese Subjects

Visfatin/Nampt, vaspin, and retinol binding protein-4 (RBP-4) play an important role in insulin resistance. The objectives of this study were to measure visfatin/Nampt, vaspin, and RBP-4 concentrations in blood, liver, muscle, subcutaneous, omental, and mesenteric adipose tissues in morbidly obese subjects and investigate their relationship to insulin resistance. Blood and tissue samples were collected from 38 morbidly obese subjects during Roux-en-Y surgery. Insulin resistance biomarkers were measured using standard kits. Visfatin/Nampt, vaspin, and RBP-4 gene expression levels in tissues were measured using real-time PCR. Their protein concentrations in blood and tissues were measured using ELISA kits. Diabetic subjects had significantly higher homeostasis model of assessment-insulin resistance and age and lower blood HDL-cholesterol concentrations than nondiabetic and prediabetic subjects. Diabetic and prediabetic subjects had significantly higher blood concentrations of visfatin/Nampt and vaspin than nondiabetic subjects. Liver RBP-4 concentrations were positively associated with blood glucose concentrations. Blood insulin resistance biomarker levels were positively associated with visfatin/Nampt concentrations in omental adipose tissue and liver, and vaspin concentrations in mesenteric adipose tissue. In conclusion, the correlations of visfatin/Nampt, vaspin, and RBP-4 with insulin resistance are tissue dependent.

scholarly journals Visceral Adipose Tissue was Associated with Increased Risk of Insulin Resistance in Lean Polycystic Ovarian Syndrome, Independent with Retinol Binding Protein-4

2020 ◽  
pp. 168-173
Author(s):  
Vita Silvana ◽  
Andon Hestiantoro ◽  
Muharam Natadisastra ◽  
Kanadi Sumapraja ◽  
Budi Wiweko
Keyword(s):  
Insulin Resistance ◽  
Body Mass Index ◽  
Adipose Tissue ◽  
Body Mass ◽  
Visceral Adipose Tissue ◽  
Binding Protein ◽  
Retinol Binding Protein ◽  
Receiver Operating Curve ◽  
Retinol Binding Protein 4 ◽  
Visceral Adipose

Objective: To determine whether visceral adipose tissue or serum RBP-4 were related with the risk increment of insulin resistance in normal BMI PCOS patients. Methods: This was a cross-sectional study conducted in normal body mass index PCOS patients at Yasmin Clinic, RSCM, Jakarta from July 2014 until March 2015. Diagnosis of PCOS was established using Rotterrdam (2003) criteria. Insulin resistance was confirmed by using ratio of HOMA-IR >1.4. Results: Among 40 subjects, 20 subjects (50%) belong insulin resistance group. Serum RBP-4 level was higher in insulin resistance group (p=0.06). After ROC analysis was conducted, area under curve for of serum RBP-4 was 69.9% (CI 95% -3754.77 - (186.60-7696.14, p=0.061)). Cut-off level of serum RBP-4 was 23814.5 ng/mL yielded sensitivity and specificity to a level of 60% and 60%, respectively. After logistic regression were analyzed, visceral adipose tissue demonstrated substantial association with the risk increment of insulin resistance in normal BMI PCOS patients. Conclusions: Visceral adipose tissue demonstrated substantial association with the risk increment of insulin resistance in normal BMI PCOS patients, independent with serum RBP-4 levels. Key words: body mass index, diagnosis, insulin resistance, PCOS, retinol binding protein-4   Abstrak Tujuan: Untuk menentukan apakah jaringan adiposa viseral atau serum RBP-4 berhubungan dengan peningkatan risiko resistensi insulin pada Sindrom Ovarium Polikistik dengan indeks masa tubuh normal. Metode: Studi potong lintang dilakukan pada subjek SOPK dengan IMT normal di Klinik Yasmin, RSCM, Jakarta sejak Juli 2014 sampai dengan Maret 2015. Penegakan diagnosis SOPK dilakukan dengan kriteria Rotterdam (2003). Resistensi insulin dikonfirmasi dengan pemeriksaan rasio HOMA-IR > 1.4 Hasil: Diantara 40 subjek, sebanyak 20 subjek (50%) mengalami resistensi insulin. Kadar serum RBP-4 lebih tinggi pada kelompok resistensi insulin (p=0.06). Setelah dilakukan analisis Receiver Operating Curve (ROC), serum RBP-4 memiliki Area Under the Curve  (AUC) sebesar 69.9% (IK 95% -3754.77 - (186.60-7696.14, p=0,061)). Titik potong kadar serum RBP-4 adalah 23814.5 ng/mL dengan sensitivitas dan spesifisitas masing-masing 60% dan 60%. Setelah dilakukan analisis regresi logistik, jaringan adiposa viseral menunjukan asosiasi yang kuat dengan terjadinya resistensi insulin pada pasien SOPK dengan IMT normal. Kesimpulan: Jaringan adiposa viseral menunjukan asosiasi yang kuat dengan terjadinya resistensi insulin pada SOPK dengan IMT normal, independen terhadap kadar serum RBP-4. Kata kunci: diagnosis, indeks masa tubuh, resistensi insulin, retinol binding protein-4, SOPK

scholarly journals Serum retinol-binding protein 4 levels in polycystic ovary syndrome

2019 ◽  
Vol 8 (6) ◽  
pp. 709-717
Author(s):  
Shilpa Lingaiah ◽  
Laure Morin-Papunen ◽  
Terhi Piltonen ◽  
Inger Sundström-Poromaa ◽  
Elisabet Stener-Victorin ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Binding Protein ◽  
Serum Levels ◽  
Retinol Binding Protein ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Retinol ◽  
Ovary Syndrome ◽  
Retinol Binding Protein 4

Objective Serum levels of retinol-binding protein 4 (RBP4), an adipokine thought to affect systemic insulin sensitivity, were compared between women with polycystic ovary syndrome (PCOS) and non-PCOS controls to evaluate the association of RBP4 with clinical, hormonal and metabolic parameters of PCOS. Subjects and methods Serum RBP4 levels were analysed in 278 women with PCOS (age range 18–57 years) and 191 non-PCOS controls (age 20–53 years) by enzyme-linked immunosorbent assay. Results Serum levels of RBP4 were increased in women with PCOS compared with control women in the whole population (45.1 ± 24.0 (s.d.) vs 33.5 ± 18.3 mg/L, P < 0.001). Age-stratified analysis showed that serum RBP4 levels were increased in women with PCOS aged ≤30 years compared with controls (47.7 ± 23.5 vs 27.1 ± 10.4 mg/L, P < 0.001), whereas no significant differences were seen in the other age groups. No significant correlations of RBP4 were seen with either steroids or indices of insulin resistance. Conclusions Although serum RBP4 levels were increased in younger women with PCOS compared with age-matched non-PCOS controls, RBP4 does not seem to be a good marker of insulin resistance or other metabolic derangements in women with PCOS.

Association of serum levels of retinol-binding protein 4 with male sex but not with insulin resistance in obese patients

2010 ◽  
Vol 116 (2) ◽  
pp. 57-62 ◽  
Author(s):  
Fatma Ülgen ◽  
Christian Herder ◽  
Markus C. Kühn ◽  
Holger S. Willenberg ◽  
Matthias Schott ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Binding Protein ◽  
Serum Levels ◽  
Retinol Binding Protein ◽  
Obese Patients ◽  
Retinol Binding Protein 4 ◽  
Male Sex

scholarly journals Minireview: Obesity and LipOdystrophy—Where Do the Circles Intersect?

Endocrinology ◽  
2008 ◽  
Vol 149 (3) ◽  
pp. 925-934 ◽  
Author(s):  
Farid F. Chehab
Keyword(s):  
Insulin Resistance ◽  
Adipose Tissue ◽  
Insulin Sensitivity ◽  
Glucose Uptake ◽  
Binding Protein ◽  
Retinol Binding Protein ◽  
Retinol Binding Protein 4 ◽  
Secreted Factors ◽  
Survival And Reproduction

Adipose tissue is unique in that it can undergo significant hypertrophy and atrophy, resulting in wide ranges of obesities and lipodystrophies. At the base of this elasticity is the lipid-filled adipocyte, which can either overfill by storing large amounts of triglycerides or shrink to a tiny cell by depleting its lipids and as such is remarkable in sustaining insults. As a major energy reservoir, the adipocyte may hold considerable calories necessary for survival and reproduction, two functions that are essential for the survival of the species. This review will summarize some of the recent studies that have advanced our understanding of the central and peripheral mechanisms that are initiated by adipocyte-secreted factors such as leptin, adiponectin, resistin, and retinol-binding protein 4. The intersection of obesity and lipodystrophy results in insulin resistance, which may be unlocked by elucidating the roles of these factors in pathways that control insulin sensitivity and glucose uptake.

Fenofibrate reduces serum retinol-binding protein-4 by suppressing its expression in adipose tissue

2009 ◽  
Vol 296 (4) ◽  
pp. E628-E634 ◽  
Author(s):  
Haiya Wu ◽  
Li Wei ◽  
Yuqian Bao ◽  
Junxi Lu ◽  
Ping Huang ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Adipose Tissue ◽  
Insulin Sensitivity ◽  
Molecular Mechanisms ◽  
Binding Protein ◽  
Retinol Binding Protein ◽  
Mrna Levels ◽  
Retinol Binding Protein 4 ◽  
Fenofibrate Treatment ◽  
Obese Rats

Fenofibrate is a peroxisome proliferator-activated receptor-α (PPARα) activator that has been clinically used to treat dyslipidemia and insulin resistance. To better understand the molecular mechanisms underlying fenofibrate action, we investigated whether fenofibrate affects serum levels of retinol-binding protein-4 (RBP4), an adipocytokine that has recently been shown to link obesity and insulin resistance. Fenofibrate treatment significantly decreased serum RBP4 levels of dyslipidemic patients, which correlated with reduced body weight and increased insulin sensitivity. To elucidate the biochemical mechanisms of fenofibrate action, we investigated the effect of fenofibrate on RBP4 expression in obese rats. Fenofibrate greatly decreased RBP4 mRNA levels in adipose tissue but not in the liver, which correlated with decreased serum RBP4 levels and increased insulin sensitivity in obese rats. Consistent with a direct effect on RBP4 expression, fenofibrate treatment significantly reduced the mRNA expression levels of RPB4 in 3T3-L1 adipocytes. Together, our results demonstrate for the first time that fenofibrate inhibits RPB4 expression in dyslipidemic human subjects and suggest that inhibition of RBP4 expression in adipocytes may provide a mechanism by which fenofibrate improves insulin sensitivity in dyslipidemic patients.

scholarly journals Is retinol binding protein 4 a link between adiposity and cancer?

2015 ◽  
Vol 23 (2) ◽  
Author(s):  
Noa Noy ◽  
Li Li ◽  
Matthew V. Abola ◽  
Nathan A. Berger
Keyword(s):  
Metabolic Disease ◽  
Insulin Resistance ◽  
Adipose Tissue ◽  
Binding Protein ◽  
The Body ◽  
Retinol Binding Protein ◽  
Retinol Binding Protein 4 ◽  
Oncogenic Pathways ◽  
Available Information ◽  
Obesity And Cancer

AbstractRetinol binding protein 4 (RBP4) is synthesized in the liver where it binds vitamin A, retinol, and transports it to tissues throughout the body. It has been shown in some studies that the level of circulating RBP4 increases with body mass, and the protein has been implicated as a mediator in the development of insulin resistance and the metabolic disease. Adipose tissue serves as another site of RBP4 synthesis, accounting for its designation as an adipokine. In addition to its function as a transport protein, RBP4 serves as a signaling molecule which, by binding to the membrane receptor STRA6, triggers downstream activation of pro-oncogenic pathways including JAK2/STAT3/5. Taken together, available information suggests the possibility that RBP4 may be a link between obesity and cancer.

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