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https://www.readbyqxmd.com/read/28196416/blood-proteomic-profiling-in-inherited-attrm-and-acquired-attrwt-forms-of-transthyretin-associated-cardiac-amyloidosis
#1
Gloria G Chan, Clarissa M Koch, Lawreen H Connors
Transthyretin-associated forms of cardiac amyloidosis are fatal protein misfolding diseases that can be inherited (ATTRm) or acquired (ATTRwt). Precise biomarkers for ATTR disease identification and monitoring are undiscovered, disease-specific therapeutic options are needed, and the current understanding of ATTR molecular pathogenesis is limited. The aim of this study was to investigate and compare the serum proteomes in ATTRm and ATTRwt cardiac amyloidosis to identify differentially expressed blood proteins that were disease-specific...
February 14, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28196196/identification-of-transthyretin-cardiac-amyloidosis-using-serum-retinol-binding-protein-4-and-a-clinical-prediction-model
#2
Marios Arvanitis, Clarissa M Koch, Gloria G Chan, Celia Torres-Arancivia, Michael P LaValley, Daniel R Jacobson, John L Berk, Lawreen H Connors, Frederick L Ruberg
Importance: Transthyretin cardiac amyloidosis (ATTR) is an underrecognized cause of heart failure (HF) in older individuals, owing in part to difficulty in diagnosis. ATTR can result from substitution of valine for isoleucine at codon 122 of the transthyretin (TTR) gene (V122I), present in 3.43% of African American individuals. Objective: To examine whether serum retinol-binding protein 4 (RBP4), an endogenous TTR ligand, could be used as a diagnostic test for ATTR V122I amyloidosis...
February 8, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28134916/rescue-of-retinal-morphology-and-function-in-a-humanized-mouse-at-the-mouse-retinol-binding-protein-locus
#3
Li Liu, Tomohiro Suzuki, Jingling Shen, Shigeharu Wakana, Kimi Araki, Ken-Ichi Yamamura, Lei Lei, Zhenghua Li
Retinol-binding protein RBP4 is the specific carrier for retinol in the blood. We previously produced a Rbp4-deficient (Rbp4(-/-)) mouse that showed electroretinogram (ERG) abnormalities, accompanied by histological and electron-microscopic changes such as fewer synapses in the inner plexiform layer in the central retina. To address whether human RBP4 gene expression can rescue the phenotypes observed in Rbp4(-/-) mice, we produced a humanized (Rbp4(hRBP4orf/ hRBP4orf)) mouse with a human RBP4 open reading frame in the mouse Rbp4 locus using a Cre-mutant lox recombination system...
January 30, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28122883/retinol-binding-protein-dependent-cholesterol-uptake-regulates-macrophage-foam-cell-formation-and-promotes-atherosclerosis
#4
Yan Liu, Yuan Zhong, Hongen Chen, Duan Wang, Min Wang, Jing-Song Ou, Min Xia
BACKGROUND: -Retinol binding protein 4 (RBP4) is an adipokine that plays decisive roles in glucose metabolism and insulin sensitivity. Elevated circulating RBP4 levels were reported to be associated with increased risk for cardiovascular disease, but the precise role of RBP4 in atherosclerotic diseases and its mechanisms of action remain elusive. METHODS: -Serum RBP4 levels of 1683 participants from South China were evaluated and the occurrence of major adverse cardiovascular events was followed up for 5 years...
January 25, 2017: Circulation
https://www.readbyqxmd.com/read/28116469/adipokines-may-mediate-the-relationship-between-resting-metabolic-rates-and-bone-mineral-densities-in-obese-women
#5
S Moradi, K Mirzaei, A A Abdurahman, S A Keshavarz
: The researchers sought to test the possible link between resting metabolic rate and bone mineral density through four adipokines. Participants with lower resting metabolic rate (RMR) per kilogram demonstrated higher total bone mineral density (BMD), total T-score, and total Z-score. Omentin-1 had a mediatory effect on the relationship between RMR/kg of body weight and bone parameters. INTRODUCTION: The previous results of studies regarding the links between obesity and bone health are controversial...
January 23, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28038989/increased-plasma-rbp4-concentration-in-older-hypertensives-is-related-to-the-decreased-kidney-function-and-the-number-of-antihypertensive-drugs-results-from-the-polsenior-substudy
#6
Marcin Majerczyk, Piotr Choręza, Maria Bożentowicz-Wikarek, Aniceta Brzozowska, Habibullah Arabzada, Aleksander Owczarek, Małgorzata Mossakowska, Tomasz Grodzicki, Tomasz Zdrojewski, Andrzej Więcek, Magdalena Olszanecka-Glinianowicz, Jerzy Chudek
Increased plasma retinol-binding protein 4 (RBP4), a novel adipokine, has been associated in previous studies with obesity, type 2 diabetes, dyslipidemia, hypertension (HT), atherosclerosis, and coronary artery disease. This study aimed to analyze the relationship between HT occurrence and its treatment, and plasma RBP4 concentrations in the older polish population. The study sample consisted of 1728 (890 men and 838 women) PolSenior study participants aged 65 years and older with available plasma samples and NT-proBNP values below 2000 pg/mL...
December 7, 2016: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28026829/retinol-binding-protein-4-rbp4-as-the-causative-factor-and-marker-of-vascular-injury-related-to-insulin-resistance
#7
Marcin Majerczyk, Magdalena Olszanecka-Glinianowicz, Monika Puzianowska-Kuźnicka, Jerzy Chudek
One of adipokines involved in the development of insulin resistance is retinol-binding protein 4(RBP4). The physiological role of RBP4 is transport of retinol from the liver to peripheral tissues. One of the first events related to the excessive visceral fat accumulation is the development of inflammation followed by hormonal adipose tissue dysfunction, including excessive RBP4 production. Reduced density of the membrane-type glucose transporter 4 (GLUT4) is considered as a direct cause for the stimulation of RBP4 release to the circulation by adipocytes...
December 21, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28002423/elevated-serum-levels-of-retinol-binding-protein-4-are-associated-with-breast-cancer-risk-a-case-control-study
#8
Congcong Jiao, Lianhua Cui, Aiguo Ma, Na Li, Hongzong Si
BACKGROUND: Retinol binding protein 4 (RBP4) is a recently identified adipokine that is elevated in patients with obesity or type 2 diabetes. A growing body of research has shown that RBP4 is associated with several types of cancer. However, no studies have investigated the relationship between serum RBP4 levels and breast cancer risk. We performed a case-control study to evaluate the association between serum RBP4 levels and the risk of breast cancer. METHODS: From August 2012 to December 2013, four-hundred subjects including 200 patients diagnosed with primary breast cancer and 200 matched healthy women were consecutively enrolled from Affiliated Hospital of Qingdao University Medical College...
2016: PloS One
https://www.readbyqxmd.com/read/27998159/relationship-between-cystatin-c-retinol-binding-protein-4-and-framingham-risk-score-in-healthy-postmenopausal-women
#9
Aleksandra Klisic, Jelena Kotur-Stevuljevic, Nebojsa Kavaric, Marija Matic
BACKGROUND: We aimed to examine the relationship between high levels of cystatin C, retinol-binding protein 4 (RBP4) and cardiovascular risk score [determined by Framingham Risk Score (FRS)] in postmenopausal women. METHODS: A total of apparently healthy 129 postmenopausal women (mean age 57.1 ± 4.6 years) were included. Serum cystatin C, RBP4, glucose, lipid parameters, creatinine, uric acid and high sensitivity C-reactive protein (hsCRP) were determined. Anthropometric parameters and blood pressure were also obtained...
December 2016: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/27933445/correlation-of-crevicular-fluid-and-serum-levels-of-retinol-binding-protein-4-and-leptin-in-chronic-periodontitis-and-obesity
#10
Dharmendra Kanoriya, A R Pradeep, A Mallika, Sandeep Singhal, Vibhuti Garg
OBJECTIVE: Retinol-binding protein 4 (RBP4) and leptin are both adipokines and involved in the pathophysiology of different vascular and inflammatory diseases and selectively elevated in patients with obesity. The aim of the present study was to determine and correlate the levels of RBP4 and leptin in gingival crevicular fluid (GCF) and serum in patients with chronic periodontitis (CP) and obesity. MATERIALS AND METHODS: A total of 70 patients with age group 25 to 45 years were divided into four groups based on gingival index (GI), probing depth (PD), clinical attachment level (CAL), body mass index (BMI) and radiographic evidence of bone loss...
December 8, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27892788/vitamin-a-deficiency-due-to-bi-allelic-mutation-of-rbp4-there-s-more-to-it-than-meets-the-eye
#11
Kamron N Khan, Keren Carss, F Lucy Raymond, Farrah Islam, Nihr BioResource-Rare Diseases Consortium, Anthony T Moore, Michel Michaelides, Gavin Arno
Vitamin A deficiency is the leading cause of preventable blindness in children worldwide and results in a well-recognized ocular phenotype. Herein we describe a patient presenting to the eye clinic with a retinal dystrophy and ocular colobomata. This combination of clinical signs and consanguineous pedigree structure suggested a genetic basis for the disease, a hypothesis that was tested using whole genome sequencing. Bi-allelic mutations in RBP4 were identified (c.248+1G>A), consistent with a diagnosis of inherited vitamin A deficiency...
November 28, 2016: Ophthalmic Genetics
https://www.readbyqxmd.com/read/27830502/vitamin-a-absorption-storage-and-mobilization
#12
William S Blaner, Yang Li, Pierre-Jacques Brun, Jason J Yuen, Seung-Ah Lee, Robin D Clugston
It is well established that chylomicron remnant (dietary) vitamin A is taken up from the circulation by hepatocytes, but more than 80 % of the vitamin A in the liver is stored in hepatic stellate cells (HSC). It presently is not known how vitamin A is transferred from hepatocytes to HSCs for storage. Since retinol-binding protein 4 (RBP4), a protein that is required for mobilizing stored vitamin A, is synthesized solely by hepatocytes and not HSCs, it similarly is not known how vitamin A is transferred from HSCs to hepatocytes...
2016: Sub-cellular Biochemistry
https://www.readbyqxmd.com/read/27830500/functions-of-intracellular-retinoid-binding-proteins
#13
Joseph L Napoli
Multiple binding and transport proteins facilitate many aspects of retinoid biology through effects on retinoid transport, cellular uptake, metabolism, and nuclear delivery. These include the serum retinol binding protein sRBP (aka Rbp4), the plasma membrane sRBP receptor Stra6, and the intracellular retinoid binding-proteins such as cellular retinol-binding proteins (CRBP) and cellular retinoic acid binding-proteins (CRABP). sRBP transports the highly lipophilic retinol through an aqueous medium. The major intracellular retinol-binding protein, CRBP1, likely enhances efficient retinoid use by providing a sink to facilitate retinol uptake from sRBP through the plasma membrane or via Stra6, delivering retinol or retinal to select enzymes that generate retinyl esters or retinoic acid, and protecting retinol/retinal from excess catabolism or opportunistic metabolism...
2016: Sub-cellular Biochemistry
https://www.readbyqxmd.com/read/27824510/association-of-bf-rbp4-and-esr2-genotypes-with-litter-size-in-an-autochthonous-pig-population
#14
G P Laliotis, A Marantidis, M Avdi
: The aim of the present study was to determine any potential association of the BF, RBP4, and ESR2 genes with reproduction traits in an autochthonous Greek pig population. The PCR-RFLP methodology was implemented for genotyping purposes of the examined genes. No deviation from the Hardy-Weinberg equilibrium was observed for the examined loci, while the B allele noted to be the more frequent in all analyzed genes. In addition, sows with the AA genotype of BF gene found to produce significantly lower numbers of the total born piglets (TNB) and number of piglets born alive (TNA), while the respective BB genotype significantly exceeded in TNB and NBA traits compared to the other two genotypes (P < 0...
November 8, 2016: Animal Biotechnology
https://www.readbyqxmd.com/read/27806063/biomarker-profiles-in-women-with-pcos-and-pcos-offspring-a-pilot-study
#15
Nadine M P Daan, Maria P H Koster, Marlieke A de Wilde, Gerdien W Dalmeijer, Annemieke M V Evelein, Bart C J M Fauser, Wilco de Jager
OBJECTIVE: To study metabolic/inflammatory biomarker risk profiles in women with PCOS and PCOS offspring. DESIGN: Cross-sectional comparison of serum biomarkers. SETTING: University Medical Center Utrecht. PATIENTS: Hyperandrogenic PCOS women (HA-PCOS, n = 34), normoandrogenic PCOS women (NA-PCOS, n = 34), non-PCOS reference population (n = 32), PCOS offspring (n = 14, age 6-8 years), and a paedriatic reference population (n = 30)...
2016: PloS One
https://www.readbyqxmd.com/read/27797907/hepatocytes-are-the-principal-source-of-circulating-rbp4-in-mice
#16
Spencer J Thompson, Ashot Sargsyan, Seung-Ah Lee, Jason J Yuen, Jinjin Cai, Rana Smalling, Norbert Ghyselinck, Manuel Mark, William S Blaner, Timothy E Graham
RBP4 is produced mainly by hepatocytes. In type 2 diabetes and obesity, circulating RBP4 is increased and may act systemically to cause insulin resistance and glucose intolerance. Observations that adipocyte RBP4 mRNA increases in parallel with circulating RBP4 in these conditions, whereas liver RBP4 mRNA does not, led to a widely held hypothesis that elevated circulating RBP4 is a direct result of increased production by adipocytes. To test this, we generated mice with hepatocyte-specific deletion of RBP4 (liver RBP4 knockout or LRKO mice)...
January 2017: Diabetes
https://www.readbyqxmd.com/read/27777632/the-effect-of-maternal-undernutrition-on-the-rat-placental-transcriptome-protein-restriction-up-regulates-cholesterol-transport
#17
Zoe Daniel, Angelina Swali, Richard Emes, Simon C Langley-Evans
BACKGROUND: Fetal exposure to a maternal low protein diet during rat pregnancy is associated with hypertension, renal dysfunction and metabolic disturbance in adult life. These effects are present when dietary manipulations target only the first half of pregnancy. It was hypothesised that early gestation protein restriction would impact upon placental gene expression and that this may give clues to the mechanism which links maternal diet to later consequences. METHODS: Pregnant rats were fed control or a low protein diet from conception to day 13 gestation...
2016: Genes & Nutrition
https://www.readbyqxmd.com/read/27775783/significance-of-change-of-retinol-binding-protein-4-level-of-plasma-of-patients-with-coronary-heart-disease-complicated-with-hyperlipidemia
#18
W-J Guan, G-J Yang
OBJECTIVE: We investigated the significance of a change in retinol binding protein (RBP4) levels in the plasma of patients with coronary heart disease complicated with hyperlipidemia. PATIENTS AND METHODS: 66 cases of coronary heart disease (CHD) patients in Cardiovascular Department of our Hospital from December 2014 to December 2015 were selected. Based on the diagnostic criteria of hyperinsulinemia, patients were divided into a CHD Group with 35 cases and a CHD-Hyperinsulinemia Group (CHD-H group) with 31 cases...
October 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27662660/genomic-characterization-of-liver-metastases-from-colorectal-cancer-patients
#19
José María Sayagués, Luís Antonio Corchete, María Laura Gutiérrez, Maria Eugenia Sarasquete, María Del Mar Abad, Oscar Bengoechea, Encarna Fermiñán, María Fernanda Anduaga, Sofia Del Carmen, Manuel Iglesias, Carmen Esteban, María Angoso, Jose Antonio Alcazar, Jacinto García, Alberto Orfao, Luís Muñoz-Bellvis
Metastatic dissemination is the most frequent cause of death of sporadic colorectal cancer (sCRC) patients. Genomic abnormalities which are potentially characteristic of such advanced stages of the disease are complex and so far, they have been poorly described and only partially understood. We evaluated the molecular heterogeneity of sCRC tumors based on simultaneous assessment of the overall GEP of both coding mRNA and non-coding RNA genes in primary sCRC tumor samples from 23 consecutive patients and their paired liver metastases...
September 20, 2016: Oncotarget
https://www.readbyqxmd.com/read/27589346/short-term-detraining-does-not-change-insulin-sensitivity-and-rbp4-in-rodents-previously-submitted-to-aerobic-exercise
#20
Rafael A Marschner, Graziela Pinto, Júlia Borges, Melissa Medeiros Markoski, Beatriz D Schaan, Alexandre Machado Lehnen
Elevated serum retinol binding protein 4 (RBP4) levels were previously described in insulin-resistance states. Exercise training can improve insulin sensitivity and RBP4, but the time-response effect of exercise detraining on RBP4 has not been studied. Thus, we examined the effects of exercise training and short-term detraining on insulin resistance, serum RBP4 levels, and GLUT4 expression in spontaneously hypertensive rats (SHR). Thirty-two male SHR, 4 months old, were submitted to 10-week treadmill training, 5 times/week or kept sedentary, followed by a 2- and 4-day detraining period...
January 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
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