scholarly journals Soluble Receptor for Advanced Glycation End Products and Its Forms in COVID-19 Patients with and without Diabetes Mellitus: A Pilot Study on Their Role as Disease Biomarkers

2020 ◽  
Vol 9 (11) ◽  
pp. 3785
Author(s):  
Elena Dozio ◽  
Clementina Sitzia ◽  
Lara Pistelli ◽  
Rosanna Cardani ◽  
Roberta Rigolini ◽  
...  

The receptor for advanced glycation end products (RAGE), a well-known player of diabetes mellitus (DM)-related morbidities, was supposed to be involved in coronavirus disease-19 (COVID-19), but no data exist about COVID-19, DM, and the soluble RAGE (sRAGE) forms. We quantified total sRAGE and its forms, the endogenously secretory esRAGE and the membrane-cleaved cRAGE, in COVID-19 patients with and without DM and in healthy individuals to explore how COVID-19 may affect these molecules and their potential role as biomarkers. Circulating sRAGE and esRAGE were quantified by enzyme-linked-immunosorbent assays. cRAGE was obtained by subtracting esRAGE from total sRAGE. sRAGE, esRAGE, cRAGE, and the cRAGE/esRAGE ratio did not differ between DM and non-DM patients and had the same trend when compared to healthy individuals. Levels of total sRAGE, cRAGE, and cRAGE/esRAGE ratio were upregulated, while esRAGE was downregulated. The lack of difference between DM and non-DM COVID-19 patients in the levels of sRAGE and its forms supports the hypothesis that in COVID-19 the RAGE system is modulated regardless of glycemic control. Identifying how sRAGE and its forms associate to COVID-19 prognosis and the potential of RAGE as a therapeutic target to control inflammatory burden seem of relevance to help treatment of COVID-19.

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 275-LB
Author(s):  
EDWIN R. MIRANDA ◽  
JR. KELLY N. FULLER ◽  
RYAN PERKINS ◽  
PAUL J. BEISSWENGER ◽  
SARAH S. FARABI ◽  
...  

Blood ◽  
2012 ◽  
Vol 119 (25) ◽  
pp. 6136-6144 ◽  
Author(s):  
Weifei Zhu ◽  
Wei Li ◽  
Roy L. Silverstein

Abstract Diabetes mellitus has been associated with platelet hyperreactivity, which plays a central role in the hyperglycemia-related prothrombotic phenotype. The mechanisms responsible for this phenomenon are not established. In the present study, we investigated the role of CD36, a class-B scavenger receptor, in this process. Using both in vitro and in vivo mouse models, we demonstrated direct and specific interactions of platelet CD36 with advanced glycation end products (AGEs) generated under hyperglycemic conditions. AGEs bound to platelet CD36 in a specific and dose-dependent manner, and binding was inhibited by the high-affinity CD36 ligand NO2LDL. Cd36-null platelets did not bind AGE. Using diet- and drug-induced mouse models of diabetes, we have shown that cd36-null mice had a delayed time to the formation of occlusive thrombi compared with wild-type (WT) in a FeCl3-induced carotid artery injury model. Cd36-null mice had a similar level of hyperglycemia and a similar level of plasma AGEs compared with WT mice under this condition, but WT mice had more AGEs incorporated into thrombi. Mechanistic studies revealed that CD36-dependent JNK2 activation is involved in this prothrombotic pathway. Therefore, the results of the present study couple vascular complications in diabetes mellitus with AGE-CD36–mediated platelet signaling and hyperreactivity.


Author(s):  
Hussein Saad Alzadi ◽  
Naza Mohammed Ali Mahmood

Diabetes mellitus (DM) compromises cell metabolism and function in many organs, resulting in increased risks of complications in many organs such as kidney, nervous system, eye, and fragility fractures. Advanced glycation end products (AGEs) are chemical moieties produced during long-term hyperglycemia; they interact with the specific receptors for AGEs (RAGEs) and make a meaningful contribution to cellular metabolism and/or alteration of their functions. Searches in PubMed using the keywords "advanced glycation end product "RAGE", "sRAGE", "DM", and "complications” were made to reveal some of the clinical outcomes of DM in cellular metabolism and organ function through the AGE-RAGE signaling pathway. All published experimental and clinical studies were included in tables. The AGE-RAGE signaling is involved in diabetic complications such as nephropathy, neuropathy, retinopathy, and osteopathy. Some clinical results in diabetic patients could be potentially attributed to AGE-RAGE signaling consequences. However, the AGE-RAGE signaling pathway has some helpful roles in many tissues, including an increase in osteogenic function. Soluble RAGE (sRAGE), as a ligand decoy, may increase in either condition of RAGE production or destruction, and then it cannot always reflect the AGE-RAGE signaling. Although various medicines are capable to target the AGE-RAGE axis. They can also limit the associated damaging consequences. Recombinant sRAGE can block the AGE-RAGE signaling pathway; however, it is associated with some limitations such as accessibility to AGEs, increase in other RAGE ligands, and a long half-life (24 hours). It is associated with losing the beneficial effect of AGE/RAGE. As a result, sRAGE is not a helpful marker to assess the activity of the RAGE signaling pathway. The recombinant sRAGE cannot be translated into clinical practice due to its limitations.


2018 ◽  
Vol 20 (4) ◽  
pp. 535-540 ◽  
Author(s):  
Mohammed Alrabiah ◽  
Khulud Abdulrahman Al-Aali ◽  
Zeyad H. Al-Sowygh ◽  
Abdulelah M. Binmahfooz ◽  
Sameer A Mokeem ◽  
...  

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