Liang Chen's research while affiliated with Shandong University and other places
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Publications (14)
The rupture and erosion of atherosclerotic plaque can induce coronary thrombosis. Prolyl-4-hydroxylase (P4H) plays a central role in the synthesis of all known types of collagens, which are the most abundant constituent of the extracellular matrix in atherosclerotic plaque. The pathogenesis of atherosclerosis is thought to be in part caused by shea...
Hypertension can increase mechanical stretch on the vessel wall, an important stimulus that induces collagen remodeling. Prolyl-4-hydroxylaseα1 (P4Hα1) and matrix metalloproteinases (MMPs) are essential for collagen synthesis and degradation. However, the effect of mechanical strain and collagen synthesis remains largely unknown. This study aimed t...
Adiponectin (APN) is an important anti‑atherogenic adipocytokine. The aim of the present study was to investigate the role of adiponectin in atherosclerotic plaque formation and clarify its mechanisms. An atherosclerosis model was induced by in vivo perivascular constrictive silica collar placement on the left common carotid arteries in male apolip...
We recently found low level of tumor suppressor programmed cell death 4 (PDCD4) associated with reduced atherosclerotic plaque area (unpublished). We investigated whether atheroprotective unidirectional pulsatile shear stress affects the expression of PDCD4 in endothelial cells.
En face co-immunostaining of the mouse aortic arch revealed a low leve...
Objectives To analyse the changes of bull's eye chart parameters by real-time three-dimensional echocardiography before and after treatment of Carvedilol for 6 months in hypertension patients with normal configuration. In order to evaluate effect of Carvedilol on left ventricular function by the parameter of excursion of left ventricular wall motio...
The purpose of this study was to investigate the association of area strain and tissue components and vulnerability of atherosclerotic plaques in a rabbit model. Forty purebred New Zealand rabbits underwent balloon-induced abdominal aorta endothelium injury, then a high-cholesterol diet for 24 weeks. Intravascular ultrasound (IVUS) images of abdomi...
Intravascular ultrasound elastography (IVUSE) is a promising imaging technique for early investigation of vulnerable plaques. Compared to radiofrequency signal processing, digital B-mode analysis is simple and of higher portability. However, rare studies have been reported validating the latter technique in vivo. In this study, we developed an IVUS...
Adiponectin is an important antiatherogenic adipocytokine that inhibits inflammation, insulin resistance, and oxide stress. Inflammation in the vascular adventitia is a crucial factor in the pathogenesis of atherosclerosis. Adventitial fibroblasts (AFs) can proliferate, divide into myofibroblasts, and migrate to the intima to become a new component...
Extracellular acidic pH-activated chloride channel I(Cl, acid), has been characterized in HEK 293 cells and mammalian cardiac myocytes. This study was designed to characterize I(Cl,acid) in human umbilical vein endothelial cells(HUVECs). The activation and deactivation of the current rapidly and repeatedly follows the change of the extracellular so...
We have reported previously that the 27nt repeat polymorphism in endothelial nitric-oxide synthase (eNOS) intron 4--a source of 27nt small RNA--inhibits eNOS expression. In the current study, we have investigated how 27nt small RNA suppresses eNOS expression. Using a chromatin immunoprecipitation assay, we examined histone acetylation in the 27nt r...
Adiponectin is an adipocyte-derived protein with insulin-sensitizing, anti-inflammatory, and anti-atherogenic properties and is abundantly found in plasma. Vascular adventitia is the outermost connective and supporting tissue of vessels. Recently, increasing evidence has shown that infection in the adventitia is one of the causes of atherosclerosis...
Objective:
Strain rate (SR) provides a quantitative segmental analysis of myocardial function. However, the use of SR with stress echocardiography to determine the ischemic myocardium has not been completely investigated. The present study aimed to determine the changes in systolic function of the ischemic myocardium by strain-rate imaging (SRI) w...
Atherosclerotic plaque rupture and thrombosis are the main causes of acute coronary syndrome. In the present study, we investigated whether ultrasound imaging and inflammatory parameters are predictive of plaque rupture in a newly established animal model. We developed a rabbit model for plaque rupture by locally delivering recombinant p53 adenovir...
In this study, we investigated the in vivo role of adiponectin, an adipocytokine, on the development of atherosclerosis in rabbits mainly using adenovirus expressing adiponectin gene (Ad-APN) and intravascular ultrasonography. Serum adiponectin concentrations in rabbits after Ad-APN local transfer to abdominal aortas increased about nine times as m...
Citations
... P4HA1 is an isozyme of P4H. Several studies have found that regulating the expression of P4HA1 can affect the stability of atherosclerotic plaque [44] and it also promotes tumor cell infiltration [45]. So far no study is available on the relationship between L-Arg and P4HA1 in the invasiveness of glioblastoma in hypoxia. ...
... Prolyl 4-hydroxylases (P4Hs) are key enzymes in collagen synthesis, and P4HA1 is the main isoform, exerting a rate-limiting function during collagen maturation and secretion [48,49]. P4HA1 is correlated with pan-cancer prognosis, indicating an immunosuppressive microenvironment, and can be used as a potential target for immunotherapy [50]. ...
... Среди нескольких десятков таких белков особый интерес вызывает адипонектин, поскольку: а) его продукция, в отличие от многих других адипокинов, при ожирении и МС снижается, предполагая возможность «заместительной» терапии МС этим адипокином либо его аналогами [1][2][3]; б) к функциям адипонектина относится повышение способности жировой ткани депонировать энергию и противодействовать тем самым отложению жира в других органах и тканях и развитию в них метаболических нарушений, а также повышение чувствительности к инсулину в адипоцитах, скелетных миоцитах и гепатоцитах [4][5][6][7]; наконец, в) адипонектин противодействует формированию атерогенной дислипидемии и большинством исследователей рассматривается как адипокин с антиатерогенным действием [8]. Действительно, уменьшение площади атеросклеротических поражений было показано в большинстве исследований на животных [9][10][11]. Однако у людей атеросклероз зачастую протекает более тяжело, с развитием осложненных бляшек. ...
Reference: Адипонектин и атерогенез
... However, it was also demonstrated that deficiency of PDCD4 alleviates AS by inhibition of inflammatory pathways [17]. The reduction of PDCD4 expression in endothelial cells is associated with reduced atherosclerotic plaque area [18], and the inhibition of PDCD4 expression suppresses apoptosis and promotes proliferation of angiotensin II (AngII)treated endothelial cell [19]. However, the potential molecular mechanism of PDCD4 in endothelial cells remains largely unknown. ...
... A pathological image analyzer was used to measure the size of the staining patch area. Image-Pro Plus 6.0 software (Media Cybernetics, Inc., Rockville, MD, USA) was used to determine the proportion of atherosclerotic plaque area to the luminal area (31,32). ...
... Среди нескольких десятков таких белков особый интерес вызывает адипонектин, поскольку: а) его продукция, в отличие от многих других адипокинов, при ожирении и МС снижается, предполагая возможность «заместительной» терапии МС этим адипокином либо его аналогами [1][2][3]; б) к функциям адипонектина относится повышение способности жировой ткани депонировать энергию и противодействовать тем самым отложению жира в других органах и тканях и развитию в них метаболических нарушений, а также повышение чувствительности к инсулину в адипоцитах, скелетных миоцитах и гепатоцитах [4][5][6][7]; наконец, в) адипонектин противодействует формированию атерогенной дислипидемии и большинством исследователей рассматривается как адипокин с антиатерогенным действием [8]. Действительно, уменьшение площади атеросклеротических поражений было показано в большинстве исследований на животных [9][10][11]. Однако у людей атеросклероз зачастую протекает более тяжело, с развитием осложненных бляшек. ...
Reference: Адипонектин и атерогенез
... As an alternative, b-mode IVUSE techniques have been developed, reporting good results in vitro and with numerical simulations (Talhami et al., 1994;Ryan and Foster, 1997;Mingxi Wan et al., 2001). Furthermore, Zhang's group developed a b-mode IVUSE system Zhang et al. (2011a) and tested it in vivo in a rabbit model (Hu et al., 2011). They used their methodology to investigate the relation between their new index called area strain (AS) (Saijo et al., 2006), which may be viewed as the rate of area deformation, and the features and vulnerability of the atherosclerotic plaques. ...
... Three to nine percent of the intimal plaque fibroblast-like cells were endothelial derived and thus had undergone complete EndMT [14]. Fibroblasts and vascular smooth muscle cells play crucial roles in atherosclerosis by regulating inflammation, the extracellular matrix, collagen production, and atherosclerotic plaque structural integrity [88,89]. Studies have shown that vascular smooth muscle cells can undergo a phenotypic transformation into macrophage-like cells, foam cells, mesenchymal stem cells, osteoblast-like cells, and other types, thereby affecting plaque stability. ...
Reference: Endothelial Reprogramming in Atherosclerosis
... RV-LS in the patients with regional MFR < 2.0 decreased in the stress state. This decrease was similar to the changes in the kinetics of the ischemic myocardium of the LV under adenosine stress [16][17][18]. Therefore, the reduced RV-LS was affected by RCA ischemia. ...
... One group did not receive medication (HCB group), and the remaining three groups were given high-dose TXL original powder (0.6 g·kg-1·day-1) on the basis of a high-cholesterol diet, for 4 weeks (HCB + TXL4w group), 8 weeks (HCB + TXL8w group), and 12 weeks (HCB + TXL12w group) respectively. At the end of the TXL treatment, the rabbits were pharmacologically triggered as described in previous study (Chen et al., 2007), that is, 0.15 mg/kg of Chinese viper venom (Obtained from the Snake Venom Research Institute of Fujian Medical University) was injected intraperitoneally, and then 30 min later, 0.02 mg/kg histamine (Sigma Chemical Corp., United States). The euthanized rabbits were subjected to pathological studies 24 h after the pharmacological trigger. ...