scholarly journals Binding of C-reactive protein to modified low-density-lipoprotein particles: identification of cholesterol as a novel ligand for C-reactive protein

2002 ◽  
Vol 367 (2) ◽  
pp. 403-412 ◽  
Author(s):  
Sanna TASKINEN ◽  
Petri T. KOVANEN ◽  
Hanna JARVA ◽  
Seppo MERI ◽  
Markku O. PENTIKÄINEN
Keyword(s):  
Cholesterol Oxidase ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Acute Phase Reactant ◽  
Cholesterol Esterase ◽  
C Reactive Protein ◽  
Reactive Protein ◽  
Modified Lipoproteins ◽  
Arterial Intima

C-reactive protein (CRP), an acute-phase reactant, is present in atherosclerotic human arterial intima in association with lipids. In the present work we studied interactions between CRP and LDL on microtitre wells, where either CRP or LDL was immobilized. LDL was modified by vortex-mixing, oxidation, or by lipolysis with phospholipase A2 or with sphingomyelinase or a combination of trypsin and cholesterol esterase. We found that CRP bound only to LDL modified by trypsin/cholesterol esterase or by sphingomyelinase and that this binding was Ca2+-dependent. In these two forms of modified LDL, non-esterified cholesterol was susceptible to cholesterol oxidase, indicating exposure of non-esterified cholesterol on particle surfaces and suggesting a role for non-esterified cholesterol in mediating CRP binding. Consistent with this hypothesis were the following findings: (i) increasing the amount of non-esterified cholesterol in LDL with cyclodextrin increased, and decreasing its amount decreased, the binding of CRP to LDL; (ii) modification of non-esterified cholesterol in LDL by cholesterol oxidase decreased the binding of CRP to LDL; and (iii) CRP bound to purified non-esterified cholesterol. The binding was Ca2+-dependent and could be competed out with phosphocholine. Taken together, these findings suggest that CRP can bind to modified lipoproteins, notably to the non-esterified cholesterol on their surface. These interactions may be related to the suggested role of CRP in the local inflammation present in atherosclerotic plaques.

scholarly journals Observational Study of Lipid Profile and C-Reactive Protein after a Seven-Day Fast

Nutrients ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 255
Author(s):  
Valeria Galetti ◽  
Marica Brnic ◽  
Benjamin Lotin ◽  
Mauro Frigeri
Keyword(s):  
Total Cholesterol ◽  
Medical Center ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Blood Parameters ◽  
Swiss Alps ◽  
Risk Level ◽  
Metabolic Risk ◽  
C Reactive Protein ◽  
Reactive Protein

Fasting is becoming an increasingly popular practice. Nevertheless, its clinical benefits and possible inconveniences remain limitedly evaluated. We observed the effects of a seven-day fast conducted in a non-medical center located in the Swiss Alps. Clinical parameters were measured on the first and last day of fasting (D1 and D7), and two months later (D60). Among the 40 participants, blood analyses were done on 25 persons with an increased metabolic risk, with the primary goal of assessing the lasting effect on low-density lipoprotein (LDL) cholesterol. By comparing D60 with D1, high-density lipoprotein cholesterol (HDL) (+0.15 mmol/L) and insulin-like growth factor-1 (IGF-1) (+2.05 mmol/L) increased (both p < 0.009), all other blood parameters (LDL, glucose, total cholesterol, triglycerides, C-reactive protein (CRP)) did not change; weight (−0.97 kg) and hearth rate (−7.31 min−1) decreased (both p < 0.006). By comparing D7 with D1, total cholesterol (+0.44 mmol/L), triglycerides (+0.37 mmol/L) and CRP (+3.37 mg/L) increased (all p < 0.02). The lack of LDL variation at D60 may be due to the low metabolic risk level of the participants. The increase of total cholesterol, triglycerides and CRP at D7 warrants studies to understand whether such fluctuations represent a stress reaction to the fasting state, which may vary in different fasting types.

scholarly journals Low density lipoprotein and very low density lipoprotein are selectively bound by aggregated C-reactive protein.

1982 ◽  
Vol 156 (1) ◽  
pp. 230-242 ◽  
Author(s):  
F C de Beer ◽  
A K Soutar ◽  
M L Baltz ◽  
I M Trayner ◽  
A Feinstein ◽  
...  
Keyword(s):  
Acute Phase ◽  
Solid Phase ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Very Low Density Lipoprotein ◽  
Low Density ◽  
C Reactive Protein ◽  
Calcium Dependent ◽  
Reactive Protein

C-reactive protein (CRP), the classical acute-phase protein, can bind phospholipids by virtue of its specific, calcium-dependent reactivity with phosphorylcholine residues. However, analysis of acute-phase serum by gel filtration and by density gradient ultracentrifugation showed that the CRP was in a free, uncomplexed form, despite the coexistent presence of the various classes of serum lipoproteins, all of which contain phospholipids. In contrast, when isolated CRP was aggregated by immobilization at a sufficient density on a solid phase and then exposed to normal human serum, it selectively bound low density lipoprotein (LDL) and traces of very low density lipoprotein. The reaction was calcium dependent and reversible by free phosphorylcholine but not by heparin. LDL isolated from normal plasma was also bound by aggregated CRP. CRP reacts in vitro with a wide variety of different ligands both of extrinsic and of autogenous origin, e.g., microbial products and damaged cell membranes, respectively. If CRP aggregated in vivo by complexing with these ligands than acquires the capacity to selectively bind LDL, the phenomenon may have significant implications for the function of CRP and for the metabolism, clearance, and deposition of LDL.

scholarly journals Phosphoethanolamine-complexed C-reactive protein: A pharmacological-like macromolecule that binds to native low-density lipoprotein in human serum

2008 ◽  
Vol 394 (1-2) ◽  
pp. 94-98 ◽  
Author(s):  
Sanjay K. Singh ◽  
Madathilparambil V. Suresh ◽  
Deborah C. Prayther ◽  
Jonathan P. Moorman ◽  
Antonio E. Rusiñol ◽  
...  
Keyword(s):  
Human Serum ◽  
Low Density Lipoprotein ◽  
Protein A ◽  
Density Lipoprotein ◽  
Low Density ◽  
C Reactive Protein ◽  
Reactive Protein ◽  
Native Low Density Lipoprotein

scholarly journals Relationship between C-reactive protein and features of the metabolic syndrome in military pilots in the Serbia and Montenegro

2005 ◽  
Vol 62 (11) ◽  
pp. 811-819
Author(s):  
Aleksandra Jovelic ◽  
Goran Radjen ◽  
Stojan Jovelic ◽  
Marica Markovic
Keyword(s):  
Metabolic Syndrome ◽  
High Density Lipoprotein ◽  
High Density Lipoprotein Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Lipoprotein Cholesterol ◽  
Low Density ◽  
C Reactive Protein ◽  
Low Density Lipoprotein Cholesterol ◽  
Reactive Protein

Background/Aim. C-reactive protein is an independent predictor of the risk of cardiovascular events and diabetes mellitus in apparently healthy men. The relationship between C-reactive protein and the features of metabolic syndrome has not been fully elucidated. To assess the cross-sectional relationship between C-reactive protein and the features of metabolic syndrome in healthy people. Methods. We studied 161 military pilots (agee, 40?6 years) free of cardiovascular disease, diabetes mellitus and active inflammation on their regular annual medical control. Age, total cholesterol, low density lipoprotein cholesterol, high density lipoprotein cholesterol, triglycerides, fasting glucose, glycosylated hemoglobin, blood pressure, smoking habit, waist circumference and body mass index were evaluated. Plasma C-reactive protein was measured by the immunonephelometry (Dade Behring) method. Metabolic syndrome was defined according to the National Cholesterol Education Program Expert Panel. Results. The mean C-reactive protein concentrations in the subjects grouped according to the presence of 0, 1, 2 and 3 or more features of the metabolic syndrome were 1.11, 1.89, 1.72 and 2.22 mg/L, respectively (p = 0.023) with a statistically, significant difference between those with 3, and without metabolic syndrome (p = 0.01). In the simple regression analyses C-reactive protein did not correlate with the total cholesterol, low density lipoprotein cholesterol, high density lipoprotein cholesterol, body mass index and blood pressure (p > 0.05). In the multiple regression analysis, waist circumference (? = 0.411, p = 0.000), triglycerides to high density lipoprotein cholesterol ratio (? = 0.774, p = 0.000), smoking habit (? = 0.236, p = 0.003) and triglycerides (? = 0.471, p = 0.027) were independent predictors of C-reactive protein. Conclusions. Our results suggested a cross-sectional independent correlation between the examined cardiovascular risk factors as the predominant features of metabolic syndrome and C-reactive protein in the group of apparently healthy subjects. The lack of correlation of C-reactive protein with the total cholesterol and low density lipoprotein cholesterol in our study may suggest their different role in the process of atherosclerosis and the possibility to determine C-reactive protein in order to identify high-risk subjects not identified with cholesterol screening.

scholarly journals KORELASI KADAR HIGH SENSITIVITY C-REACTIVE PROTEIN DENGAN KADAR LOW DENSITY LIPOPROTEIN PADA PENYANDANG OBES

2020 ◽  
Vol 5 (3) ◽  
pp. 676
Author(s):  
Rama Dhanivita Djamin
Keyword(s):  
Interleukin 1 ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
High Sensitivity ◽  
Low Grade ◽  
Low Density ◽  
C Reactive Protein ◽  
Necrosis Factor Alpha ◽  
Reactive Protein ◽  
Hs Crp

<p><em>Obesitas terjadi karena akumulasi lemak berlebih di dalam tubuh. Akumulasi lemak menimbulkan low grade inflammation pada jaringan adiposa, menyebabkan peningkatan sitokin inflamasi seperti tumor necrosis factor-alpha, interleukin-1 beta, dan interleukin-6 (IL-6). Peningkatan sekresi IL-6 merangsang hepar meningkatkan produksi protein fase akut. High sensitivity C-reactive protein (hs-CRP) sebagai penanda inflamasi merupakan protein fase akut. Low density lipoprotein (LDL-kolesterol) adalah lipoprotein yang paling banyak mengandung kolesterol. Peningkatan kadar hs-CRP dan kadar LDL-kolesterol pada obesitas diidentifikasi sebagai faktor risiko aterosklerosis. Penelitian ini bertujuan menganalisis hubungan hs-CRP dengan LDL-kolesterol pada penyandang obes, merupakan penelitian analitik rancangan potong lintang dilakukan  September 2018 sampai Agustus 2019. Kadar hs-CRP diperiksa dengan metode enzyme linked immunoassay (ELISA), sedangkan kadar LDL-kolesterol dengan metode kalkulasi (rumus Friedewald). Uji korelasi Spearman digunakan untuk menganalisi data, jika didapatkan nilai p&lt;0,05 korelasi dinyatakan bermakna. Subjek penelitian berjumlah 26 penyandang obes terdiri dari 6 laki-laki (23,1%) dan 20 perempuan (76,9%). Rerata umur subjek penelitian adalah 36,46(7,68) tahun. Rerata kadar hs-CRP dan kadar LDL-kolesterol adalah 5,08(1,28) mg/L dan  154,69(45,8) mg/dL. Analisis korelasi menunjukkan korelasi positif lemah dan tidak bermakna secara statistik antara kadar hs-CRP dengan kadar LDL-kolesterol (r= 0,333, p=0,096). Simpulan: Terdapat korelasi positif lemah antara kadar hs-CRP dengan kadar LDL-kolesterol pada penyandang obes.</em></p><p><strong><em>Kata kunci</em></strong><em>: </em><em>Obesitas, High Sensitivity C-Reactive, Low Density Lipoprotein</em><em></em></p>

scholarly journals INDICATORS OF INFLAMMATION IN THE PATHOGENESIS OF UNSTABLE ANGINA

2020 ◽  
Vol 73 (3) ◽  
pp. 569-573 ◽  
Author(s):  
Yevheniia H. Zaremba ◽  
Olha V. Smaliukh ◽  
Olena V. Zaremba-Fedchyshyn ◽  
Olha V. Zaremba ◽  
Andriy S. Kost ◽  
...  
Keyword(s):  
Unstable Angina ◽  
Inflammatory Cytokines ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Blood Lipid ◽  
Low Density ◽  
C Reactive Protein ◽  
Low Density Lipoprotein Cholesterol ◽  
Reactive Protein ◽  
Lipid Spectrum

The aim: Research of blood lipid spectrum, level of anti-inflammatory cytokines and C-reactive protein of coronary heart disease patients. Materials and methods: There was examined 61 patients with unstable angina, who had been on hospital care in the cardiology department of the Lviv National Emergency Hospital. Their average age was 68.3 ± 1.9 years. The control group included 20 generally healthy persons. There was estimated blood lipid spectrum, C-reactive protein, fibrinogen and proinflammatory cytokine of patients. Results: There was determined considerable increase total cholesterol, low density lipoprotein cholesterol, very low density lipoprotein cholesterol, triglycerides and coefficient of atherogenicity. High level of C-reactive protein and pro-inflammatory cytokines were detected in patients with unstable angina. Conclusions: In patients with unstable angina was revealed a significant increase of proinflammatory cytokines levels in the blood serum: interleukin-1β, interleukin-6, interleukin-17, TNF-α and C-reactive protein, fibrinogen, which indicates activation of the inflammatory process. In patients with unstable angina was detected a significant disorder of blood lipid spectrum. For its correction should be recommended diet and hypolipidemic agents.

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