Soluble Levels of Receptor for Advanced Glycation Endproducts (RAGE) and Progression of Atherosclerosis in Individuals Infected with Human Immunodeficiency Virus: ACTG NWCS 332

Atherosclerosis Vascular Endothelial Secretion Dysfunction and Smooth Muscle Cell Proliferation

Atherosclerosis is a chronic inflammatory disease of the arterial wall and the main cause of cardiovascular disease and cerebrovascular disease. In recent years, the mortality rate of atherosclerotic diseases has become higher and higher. This article aims to study the dysregulation of atherosclerotic vascular endothelial secretion and smooth muscle cell proliferation, and put forward and practice the pathological research of atherosclerotic disease. This article describes in detail atherosclerosis, endothelial dysfunction, and smooth muscle cell proliferation, and studies the causes of atherosclerosis. Research results indicate that atherosclerotic vascular endothelial dysfunction also has a great influence on the proliferation of smooth muscle cells. Many genes and environmental factors can regulate the functions of endothelial cells, vascular smooth muscle cells, and mononuclear macrophages and affect the formation of atherosclerosis. At the same time, diabetes, hypertension, hyperlipidemia, obesity, etc. are the main causes of atherosclerosis. The number of patients with cardiovascular and cerebrovascular diseases dying from atherosclerosis in the country is increasing, and the proportion is close to 30%.

Soluble levels of receptor for advanced glycation endproducts and dysfunctional high-density lipoprotein in persons infected with human immunodeficiency virus: ACTG NWCS332

The role of high-density lipoprotein (HDL) function and advanced glycation end products (AGEs) in HIV-related atherosclerotic cardiovascular disease (CVD) is unclear. Both glycation and oxidation (HDLox) are major modifications of HDL that can alter its composition and function. Therefore, we explored the longitudinal association of HDLox with progression of glycation, as evaluated by measurement of circulating forms of receptor for AGE that predict morbidity (soluble Receptors for Advanced Glycation Endproducts [sRAGE], endogenous secretory Receptors for Advanced Glycation Endproducts [esRAGE]), in people with HIV-1 (PWH; HIV-1) and uninfected (HIV-1) individuals.We retrospectively assessed if levels of plasma sRAGE and esRAGE and HDL function (reduced antioxidant function is associated with increased HDL lipid hydroperoxide content; HDLox) in a subset of participants (n = 80) from a prospective 3-year study (AIDS Clinical Trials Group A5078). Primary outcomes were baseline and yearly rates of change over 96 of 144 weeks (Δ) in HDLox in HIV-1 versus uninfected HIV-1 controls (noted as HIV-1).Higher baseline levels of sRAGE in PWH on effective anti-retroviral therapy and with low CVD risk, but not in HIV-1 persons, were independently associated with higher HDLox. EsRAGE, but not sRAGE, had consistent inverse relationships with ΔHDLox in both HIV-1 and HIV-1 persons at baseline. In HIV-1 but not in HIV-1 persons, ΔHDLox had positive and inverse relationships with ΔRAGE and ΔesRAGE, respectively.Glycation and oxidation of HDL may contribute to impaired HDL function present in PWH.

Experimental study of the anti-atherosclerotic effect of demethylzeylasteral

This study aimed to confirm that atherosclerosis (AS) is a systemic immune-mediated chronic inflammatory disease and to investigate the anti-atherosclerotic effect of demethylzeylasteral by testing the immunocompetent cells and inflammatory mediators in the blood and atherosclerotic plaques of the rabbit model of AS. For this purpose, 60 male New Zealand white rabbits were given 150 g high-fat diet (1% cholesterol, 5% lard, and 15% egg yolk powder) daily for a total of 90 days. On day 61, the rabbits were randomly divided into the saline group (n=15), the rosuvastatin group (n=15), the low-dose demethylzeylasteral group (n=15), and the high-dose demethylzeylasteral group (n=15). The CD3⁺ T lymphocytes and the subsets CD4⁺, CD8⁺, and CD4⁺/CD8⁺, as well as the soluble interleukin-2 receptor (sIL-2R) were measured before and after the treatment. The contents of immunoglobulins IgG, IgA and IgM and the levels of complements C3 and C4 were also monitored. In addition, the level of anti-oxidized low-density lipoprotein (ox-LDL) antibody, the inflammatory cytokines tumor necrosis factor-α (TNF-α), IL-6 and metalloproteinase-9 (MMP-9), the blood lipids triglyceride (TG), total cholesterol (TC), LDL cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C) were measured, and the severity of plaque lesions was also evaluated. Our results showed that the saline group, the rosuvastatin group and the low-dose demethylzeylasteral group had significantly lower activated T lymphocyte parameters CD3⁺, CD4⁺, CD8⁺ and CD4⁺/CD8⁺ (P<0.05), and significantly higher levels of sIL-2R, immunoglobulins IgG, IgA and IgM, complements C3 and C4, anti-ox-LDL antibody, TNF-α, IL-6 and MMP-9 (P<0.01) when compared with the high-dose demethylzeylasteral group. Moreover, TG, TC, LDL-C contents were found significantly lower and their HDL-C contents were significantly higher in high-dose demethylzeylasteral group (P<0.01) as compared to the other three groups. Furthermore, Sudan staining and haematoxylin and eosin staining of the thoracic aorta showed that, after 30-day treatment, the high-dose demethylzeylasteral group had the smoothest intima and the lightest plaque lesions among the four groups. Based on these results, we concluded that AS is a systemic immune-mediated chronic inflammatory disease and the relatively high dose of demethylzeylasteral used in the treatment of atherosclerotic rabbits could significantly alleviate AS. This implies that demethylzeylasteral may be considered as a suitable drug for anti-immunization therapy.